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1

Coal gasification systems engineering and analysis. Volume 1: Executive summary  

NASA Technical Reports Server (NTRS)

Feasibility analyses and systems engineering studies for a 20,000 tons per day medium Btu (MBG) coal gasification plant to be built by TVA in Northern Alabama were conducted. Major objectives were as follows: (1) provide design and cost data to support the selection of a gasifier technology and other major plant design parameters, (2) provide design and cost data to support alternate product evaluation, (3) prepare a technology development plan to address areas of high technical risk, and (4) develop schedules, PERT charts, and a work breakdown structure to aid in preliminary project planning. Volume one contains a summary of gasification system characterizations. Five gasification technologies were selected for evaluation: Koppers-Totzek, Texaco, Lurgi Dry Ash, Slagging Lurgi, and Babcock and Wilcox. A summary of the trade studies and cost sensitivity analysis is included.

1980-01-01

2

Coal gasification systems engineering and analysis. Appendix A: Coal gasification catalog  

NASA Technical Reports Server (NTRS)

The scope of work in preparing the Coal Gasification Data Catalog included the following subtasks: (1) candidate system subsystem definition, (2) raw materials analysis, (3) market analysis for by-products, (4) alternate products analysis, (5) preliminary integrated facility requirements. Definition of candidate systems/subsystems includes the identity of and alternates for each process unit, raw material requirements, and the cost and design drivers for each process design.

1980-01-01

3

Coal gasification systems engineering and analysis. Appendix H: Work breakdown structure  

NASA Technical Reports Server (NTRS)

A work breakdown structure (WBS) is presented which encompasses the multiple facets (hardware, software, services, and other tasks) of the coal gasification program. The WBS is shown to provide the basis for the following: management and control; cost estimating; budgeting and reporting; scheduling activities; organizational structuring; specification tree generation; weight allocation and control; procurement and contracting activities; and serves as a tool for program evaluation.

1980-01-01

4

EMERY BIOMASS GASIFICATION POWER SYSTEM  

SciTech Connect

Emery Recycling Corporation (now Emery Energy Company, LLC) evaluated the technical and economical feasibility of the Emery Biomass Gasification Power System (EBGPS). The gasifier technology is owned and being developed by Emery. The Emery Gasifier for this project was an oxygen-blown, pressurized, non-slagging gasification process that novelly integrates both fixed-bed and entrained-flow gasification processes into a single vessel. This unique internal geometry of the gasifier vessel will allow for tar and oil destruction within the gasifier. Additionally, the use of novel syngas cleaning processes using sorbents is proposed with the potential to displace traditional amine-based and other syngas cleaning processes. The work scope within this project included: one-dimensional gasifier modeling, overall plant process modeling (ASPEN), feedstock assessment, additional analyses on the proposed syngas cleaning process, plant cost estimating, and, market analysis to determine overall feasibility and applicability of the technology for further development and commercial deployment opportunities. Additionally, the project included the development of a detailed technology development roadmap necessary to commercialize the Emery Gasification technology. Process modeling was used to evaluate both combined cycle and solid oxide fuel cell power configurations. Ten (10) cases were evaluated in an ASPEN model wherein nine (9) cases were IGCC configurations with fuel-to-electricity efficiencies ranging from 38-42% and one (1) case was an IGFC solid oxide case where 53.5% overall plant efficiency was projected. The cost of electricity was determined to be very competitive at scales from 35-71 MWe. Market analysis of feedstock availability showed numerous market opportunities for commercial deployment of the technology with modular capabilities for various plant sizes based on feedstock availability and power demand.

Benjamin Phillips; Scott Hassett; Harry Gatley

2002-11-27

5

Integrated bioenergy conversion concepts for small scale gasification power systems  

NASA Astrophysics Data System (ADS)

Thermal and biological gasification are promising technologies for addressing the emerging concerns in biomass-based renewable energy, environmental protection and waste management. However, technical barriers such as feedstock quality limitations, tars, and high NOx emissions from biogas fueled engines impact their full utilization and make them suffer at the small scale from the need to purify the raw gas for most downstream processes, including power generation other than direct boiler use. The two separate gasification technologies may be integrated to better address the issues of power generation and waste management and to complement some of each technologies' limitations. This research project investigated the technical feasibility of an integrated thermal and biological gasification concept for parameters critical to appropriately matching an anaerobic digester with a biomass gasifier. Specific studies investigated the thermal gasification characteristics of selected feedstocks in four fixed-bed gasification experiments: (1) updraft gasification of rice hull, (2) indirect-heated gasification of rice hull, (3) updraft gasification of Athel wood, and (4) downdraft gasification of Athel and Eucalyptus woods. The effects of tars and other components of producer gas on anaerobic digestion at mesophilic temperature of 36°C and the biodegradation potentials and soil carbon mineralization of gasification tars during short-term aerobic incubation at 27.5°C were also examined. Experiments brought out the ranges in performance and quality and quantity of gasification products under different operating conditions and showed that within the conditions considered in the study, these gasification products did not adversely impact the overall digester performance. Short-term aerobic incubation demonstrated variable impacts on carbon mineralization depending on tar and soil conditions. Although tars exhibited low biodegradation indices, degradation may be improved if the microorganisms used to deal with tars are selected and pre-conditioned to the tar environment. Overall, the results provided a basis for operational and design strategy for a combined gasification system but further study is recommended such as determination of the impacts in terms of emissions, power, efficiency and costs associated with the use of producer gas-enriched biogas taking advantage of hydrogen enrichment to reduce NOx and other pollutants in reciprocating engines and other energy conversion systems.

Aldas, Rizaldo Elauria

6

Coal Integrated Gasification Fuel Cell System Study  

SciTech Connect

This study analyzes the performance and economics of power generation systems based on Solid Oxide Fuel Cell (SOFC) technology and fueled by gasified coal. System concepts that integrate a coal gasifier with a SOFC, a gas turbine, and a steam turbine were developed and analyzed for plant sizes in excess of 200 MW. Two alternative integration configurations were selected with projected system efficiency of over 53% on a HHV basis, or about 10 percentage points higher than that of the state-of-the-art Integrated Gasification Combined Cycle (IGCC) systems. The initial cost of both selected configurations was found to be comparable with the IGCC system costs at approximately $1700/kW. An absorption-based CO2 isolation scheme was developed, and its penalty on the system performance and cost was estimated to be less approximately 2.7% and $370/kW. Technology gaps and required engineering development efforts were identified and evaluated.

Chellappa Balan; Debashis Dey; Sukru-Alper Eker; Max Peter; Pavel Sokolov; Greg Wotzak

2004-01-31

7

Power Systems Development Facility Gasification Test Campaign TC22  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF), located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coals. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a KBR Transport Gasifier, a hot gas particulate control device, advanced syngas cleanup systems, and high-pressure solids handling systems. This report summarizes the results of TC22, the first test campaign using a high moisture lignite from Mississippi as the feedstock in the modified Transport Gasifier configuration. TC22 was conducted from March 24 to April 17, 2007. The gasification process was operated for 543 hours, increasing the total gasification operation at the PSDF to over 10,000 hours. The PSDF gasification process was operated in air-blown mode with a total of about 1,080 tons of coal. Coal feeder operation was challenging due to the high as-received moisture content of the lignite, but adjustments to the feeder operating parameters reduced the frequency of coal feeder trips. Gasifier operation was stable, and carbon conversions as high as 98.9 percent were demonstrated. Operation of the PCD and other support equipment such as the recycle gas compressor and ash removal systems operated reliably.

Southern Company Services

2008-11-01

8

Improved system integration for integrated gasification combined cycle (IGCC) systems  

Microsoft Academic Search

Integrated gasification combined cycle (IGCC) systems are a promising technology for power generation. They include an air separation unit (ASU), a gasification system, and a gas turbine combined cycle power block, and feature competitive efficiency and lower emissions compared to conventional power generation technology. IGCC systems are not yet in widespread commercial use and opportunities remain to improve system feasibility

H. Christopher Frey; Yunhua Zhu

2006-01-01

9

Power Systems Development Facility Gasification Test Campaign TC16  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coals. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a KBR (formerly Kellogg Brown & Root) Transport Gasifier, a hot gas particulate control device, advanced syngas cleanup systems, and high-pressure solids handling systems. This report discusses Test Campaign TC16 of the PSDF gasification process. TC16 began on July 14, 2004, lasting until August 24, 2004, for a total of 835 hours of gasification operation. The test campaign consisted of operation using Powder River Basin (PRB) subbituminous coal and high sodium lignite from the North Dakota Freedom mine. The highest gasifier operating temperature mostly varied from 1,760 to 1,850 F with PRB and 1,500 to 1,600 F with lignite. Typically, during PRB operations, the gasifier exit pressure was maintained between 215 and 225 psig using air as the gasification oxidant and between 145 and 190 psig while using oxygen as the oxidant. With lignite, the gasifier operated only in air-blown mode, and the gasifier outlet pressure ranged from 150 to 160 psig.

Southern Company Services

2004-08-24

10

Power Systems Development Facility Gasification Test Campaign TC20  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF), located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coal. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a Transport Gasifier, a hot gas particulate control device (PCD), advanced syngas cleanup systems, and high-pressure solids handling systems. This report summarizes the results of the first demonstration of the Transport Gasifier following significant modifications of the gasifier configuration. This demonstration took place during test campaign TC20, occurring from August 8 to September 23, 2006. The modifications proved successful in increasing gasifier residence time and particulate collection efficiency, two parameters critical in broadening of the fuel operating envelope and advancing gasification technology. The gasification process operated for over 870 hours, providing the opportunity for additional testing of various gasification technologies, such as PCD failsafe evaluation and sensor development.

Southern Company Services

2006-09-30

11

Power Systems Development Facility Gasification Test Campaing TC14  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coals. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a KBR Transport Gasifier, a hot gas particulate control device (PCD), advanced syngas cleanup systems, and high pressure solids handling systems. This report details test campaign TC14 of the PSDF gasification process. TC14 began on February 16, 2004, and lasted until February 28, 2004, accumulating 214 hours of operation using Powder River Basin (PRB) subbituminous coal. The gasifier operating temperatures varied from 1760 to 1810 F at pressures from 188 to 212 psig during steady air blown operations and approximately 160 psig during oxygen blown operations.

Southern Company Services

2004-02-28

12

A Review of Fixed Bed Gasification Systems for Biomass  

Microsoft Academic Search

The gasification of biomass into useful fuel enhances its potential as a renewable energy resource. The fixed bed gasification systems are classified as updraft, Imbert downdraft, throatless downdraft, crossdraft and two stage gasifiers. Updraft gasifiers are suitable for gasification of biomass containing high ash (up to 15 %) and high moisture content (up to 50 %) and generate producer gas

Sangeeta Chopra; Anil Kr Jain

13

Power Systems Development Facility Gasification Test Campaign TC17  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coals. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a KBR (formerly Kellogg Brown & Root) Transport Gasifier, a hot gas particulate control device, advanced syngas cleanup systems, and high-pressure solids handling systems. This report summarizes the results gasification operation with Illinois Basin bituminous coal in PSDF test campaign TC17. The test campaign was completed from October 25, 2004, to November 18, 2004. System startup and initial operation was accomplished with Powder River Basin (PRB) subbituminous coal, and then the system was transitioned to Illinois Basin coal operation. The major objective for this test was to evaluate the PSDF gasification process operational stability and performance using the Illinois Basin coal. The Transport Gasifier train was operated for 92 hours using PRB coal and for 221 hours using Illinois Basin coal.

Southern Company Services

2004-11-30

14

Hydrogen production by biomass gasification in supercritical water using concentrated solar energy: System development and proof of concept  

Microsoft Academic Search

A novel system of hydrogen production by biomass gasification in supercritical water using concentrated solar energy has been constructed, installed and tested at the State Key Laboratory of Multiphase Flow in Power Engineering (SKLMF). The “proof of concept” tests for solar-thermal gasification of biomass in supercritical water (SCW) were successfully carried out. Biomass model compounds (glucose) and real biomass (corn

Jingwei Chen; Youjun Lu; Liejin Guo; Ximin Zhang; Peng Xiao

2010-01-01

15

Development of a catalytic system for gasification of wet biomass  

SciTech Connect

A gasification system is under development at Pacific Northwest Laboratory that can be used with high-moisture biomass feedstocks. The system operates at 350 C and 205 atm using a liquid water phase as the processing medium. Since a pressurized system is used, the wet biomass can be fed as a slurry to the reactor without drying. Through the development of catalysts, a useful processing system has been produced. This paper includes assessment of processing test results of different catalysts. Reactor system results including batch, bench-scale continuous, and engineering-scale processing results are presented to demonstrate the applicability of this catalytic gasification system to biomass. The system has utility both for direct conversion of biomass to fuel gas or as a wastewater cleanup system for treatment of unconverted biomass from bioconversion processes. By the use of this system high conversion of biomass to fuel gas can be achieved. Medium-Btu is the primary product. Potential exists for recovery/recycle of some of the unreacted inorganic components from the biomass in the aqueous byproduct stream.

Elliott, D.C.; Sealock, L.J.; Phelps, M.R.; Neuenschwander, G.G.; Hart, T.R.

1993-08-01

16

Power generation potential of biomass gasification systems  

SciTech Connect

Biomass has the potential to contribute a significant portion of the electricity consumed in industrialized nations and a major share of the power mix in developing countries. In addition to providing an alternative to fossil-fuel-based energy and creating new markets for agriculture, a renewable resource like biomass used in a sustainable fashion facilitates closure of the carbon cycle. To realize these benefits, particularly in the shadow of uncertainties cast by deregulation and recent changes in federal energy and agricultural policies, biomass power systems must be competitive with incumbent power-generation technologies in terms of generation efficiency and overall cost. Anticipated performance and cost of biomass-based integrated gasification, combined-cycle power systems are discussed. The electric power that can be generated worldwide using existing biomass resources (primarily crop residues and wastes) and the potential amount that could be generated from crops grown specifically for electricity generation are projected. Technical and economic obstacles that must be overcome before advanced biomass-power systems based on aeroderivative turbines or fuel cells can become fully commercial are identified. Research, development, and demonstration efforts under way or being planned to overcome those obstacles are described; developments in a major biomass gasification demonstration project taking place in Hawaii under the auspices of the US Department of Energy and the State of Hawaii are detailed.

Kinoshita, C.M.; Turn, S.Q. [Univ. of Hawaii, Honolulu, HI (United States); Overend, R.P.; Bain, R.L. [National Renewable Energy Lab., Golden, CO (United States)

1997-12-01

17

Power Systems Development Facility Gasification Test Campaign TC25  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF), located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coals. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a KBR Transport Gasifier, a hot gas particulate control device, advanced syngas cleanup systems, and high-pressure solids handling systems. This report summarizes the results of TC25, the second test campaign using a high moisture lignite coal from the Red Hills mine in Mississippi as the feedstock in the modified Transport Gasifier configuration. TC25 was conducted from July 4, 2008, through August 12, 2008. During TC25, the PSDF gasification process operated for 742 hours in air-blown gasification mode. Operation with the Mississippi lignite was significantly improved in TC25 compared to the previous test (TC22) with this fuel due to the addition of a fluid bed coal dryer. The new dryer was installed to dry coals with very high moisture contents for reliable coal feeding. The TC25 test campaign demonstrated steady operation with high carbon conversion and optimized performance of the coal handling and gasifier systems. Operation during TC25 provided the opportunity for further testing of instrumentation enhancements, hot gas filter materials, and advanced syngas cleanup technologies. The PSDF site was also made available for testing of the National Energy Technology Laboratory's fuel cell module and Media Process Technology's hydrogen selective membrane with syngas from the Transport Gasifier.

Southern Company Services

2008-12-01

18

Power Systems Development Facility Gasification Test Campaign TC24  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF), located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coals. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a KBR Transport Gasifier, a hot gas particulate control device, advanced syngas cleanup systems, and high-pressure solids handling systems. This report summarizes the results of TC24, the first test campaign using a bituminous coal as the feedstock in the modified Transport Gasifier configuration. TC24 was conducted from February 16, 2008, through March 19, 2008. The PSDF gasification process operated for about 230 hours in air-blown gasification mode with about 225 tons of Utah bituminous coal feed. Operational challenges in gasifier operation were related to particle agglomeration, a large percentage of oversize coal particles, low overall gasifier solids collection efficiency, and refractory degradation in the gasifier solids collection unit. The carbon conversion and syngas heating values varied widely, with low values obtained during periods of low gasifier operating temperature. Despite the operating difficulties, several periods of steady state operation were achieved, which provided useful data for future testing. TC24 operation afforded the opportunity for testing of various types of technologies, including dry coal feeding with a developmental feeder, the Pressure Decoupled Advanced Coal (PDAC) feeder; evaluating a new hot gas filter element media configuration; and enhancing syngas cleanup with water-gas shift catalysts. During TC24, the PSDF site was also made available for testing of the National Energy Technology Laboratory's fuel cell module and Media Process Technology's hydrogen selective membrane.

Southern Company Services

2008-03-30

19

Power Systems Development Facility Gasification Test Campaign TC21  

SciTech Connect

In support of technology development to utilize coal for efficient, affordable, and environmentally clean power generation, the Power Systems Development Facility (PSDF), located in Wilsonville, Alabama, routinely demonstrates gasification technologies using various types of coal. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems, including a Transport Gasifier, a hot gas particulate control device (PCD), advanced syngas cleanup systems, and high-pressure solids handling systems. This report summarizes the results of the first demonstration of gasification operation with lignite coal following the 2006 gasifier configuration modifications. This demonstration took place during test campaign TC21, occurring from November 7, 2006, through January 26, 2007. The test campaign began with low sodium lignite fuel, and after 304 hours of operation, the fuel was changed to high sodium lignite, for 34 additional hours of operation. Both fuels were from the North Dakota Freedom mine. Stable operation with low sodium lignite was maintained for extended periods, although operation with high sodium lignite was problematic due to agglomeration formation in the gasifier restricting solids circulation.

Southern Company Services

2007-01-30

20

Solar heated fluidized bed gasification system  

SciTech Connect

This solar-heated gasification system avoids the problems inherent in other solar processes (such as blackened solar-input windows and overheated zones on the reactor walls) by heating the fluidizing gas and steam in a solar-heat absorption zone before they enter the reactor. Energy to heat the gas and steam concentrates in high-heat-capacity refractory honeycomb that surrounds the fluidized-bed reactor zone. Solar concentrators focus the solar energy on the honeycomb through a solar window. The reaction zone is also heated directly and uniformly by thermal contact of the ceramic honeycomb with the walls of the reactor. The reactor handles such solids as coal and biomass.

Frosch, R.A.; Qader, S.A.

1981-09-22

21

Case-study of a coal gasification-based energy supply system for China  

E-print Network

Case-study of a coal gasification-based energy supply system for China Zheng Hongtao Department of Thermal Engineering, Tsinghua University, 100084 Beijing, China Tel: +86-10-62795738; fax: +86, Tsinghua University, 100084 Beijing, China Eric D. Larson Princeton Environmental Institute, Princeton

22

Introduction Systems Engineering Fundamentals ENGINEERING  

E-print Network

Introduction Systems Engineering Fundamentals i SYSTEMS ENGINEERING FUNDAMENTALS January 2001;Systems Engineering Fundamentals Introduction ii #12;Introduction Systems Engineering Fundamentals iii ............................................................................................................................................. iv PART 1. INTRODUCTION Chapter 1. Introduction to Systems Engineering Management

Rhoads, James

23

Basic design of the coal gasification systems for Korean IGCC application  

SciTech Connect

Presented is the basic design scheme of coal gasification system as a part of IGCC engineering package. The basic design scheme has sequential design steps for pulverized coal storage bin, lock hoppers, injection vessels, coal/oxidizer burner nozzles, gasifier, preheater, slag discharge hopper and product gas quencher. Each design module is constructed to generate design data and specifications, and is then coupled together with other design modules in computerized system. The present design method was used for small scale coal gasification facility construction with success, and can be applied to perform parametric studies and scale-up analyses that will be helpful for large scale IGCC power plant applications.

Kim, H.T.; Kim, S.W. [Ajou Univ., Suwon (Korea, Republic of). Dept. of Energy; Lee, C. [Univ. of Suwon (Korea, Republic of). Dept. of Mechanical Engineering

1996-12-31

24

Techniques for Mercury Control and Measurement in Gasification Systems  

SciTech Connect

A major concern for power systems that use coal as an energy source is the air emissions from the plant. Although certain air emissions are currently regulated, the emergence of new regulations for other pollutants are on the horizon. Gasification is an important strategy for increasing the utilization of abundant domestic coal reserves. The Department of Energy envisions increased use of gasification in the United States during the next twenty years. As such, the DOE Gasification Technologies Program will strive to approach a near-zero emissions goal with respect to pollutants. The mercury research detailed in this proposal addresses the Gas Cleaning and Conditioning program technology area.

Granite, E.J.; King, W.P.; Pennline, H.W.

2002-09-20

25

Coal gasification: Technology status report  

SciTech Connect

The US Department of Energy's (DOE) Morgantown Energy Technology Center (METC) is currently sponsoring research and development (R and D) activities in surface coal gasification. The activities are primarily aimed at exploring and developing flexibility of the coal gasification technology. A wide range of technical needs could then be met for systems that are based on coal gasification. The systems include (1) integrated gasification combined cycle (IGCC) for electric power production, (2) production of synthesis gas, (3) production of value-added coproducts, and (4) production of industrial fuel gas. The R and D projects that are included in the Surface Coal Gasification Program cover a wide spectrum of technology development stages. These projects range from laboratory-scale investigations of a fundamental nature to the engineering-scale process development units (PDU's). In the area of laboratory-scale projects, fundamentals of gasification, gas purification, and gas separation are investigated to understand certain key parameters that will lead to gasification-based systems as the most desired energy alternatives. For the engineering-scale PDU's, novel process concepts are evaluated to obtain critical engineering and process data to translate the concepts into sound engineering designs. In addition, activities in the area of mathematical interpretation of coal gasification and associated gas separation and gas purification technologies are pursued to develop predictive capabilities and to conduct preliminary evaluations of various systems. This report provides comprehensive summaries of major accomplishments of the various projects in the Surface Coal Gasification Program. 5 refs., 18 figs., 4 tabs.

Not Available

1986-12-01

26

Improved system integration for integrated gasification combined cycle (IGCC) systems  

SciTech Connect

Integrated gasification combined cycle (IGCC) systems are a promising technology for power generation. They include an air separation unit (ASU), a gasification system, and a gas turbine combined cycle power block, and feature competitive efficiency and lower emissions compared to conventional power generation technology. IGCC systems are not yet in widespread commercial use and opportunities remain to improve system feasibility via improved process integration. A process simulation model was developed for IGCC systems with alternative types of ASU and gas turbine integration. The model is applied to evaluate integration schemes involving nitrogen injection, air extraction, and combinations of both, as well as different ASU pressure levels. The optimal nitrogen injection only case in combination with an elevated pressure ASU had the highest efficiency and power output and approximately the lowest emissions per unit output of all cases considered, and thus is a recommended design option. The optimal combination of air extraction coupled with nitrogen injection had slightly worse efficiency, power output, and emissions than the optimal nitrogen injection only case. Air extraction alone typically produced lower efficiency, lower power output, and higher emissions than all other cases. The recommended nitrogen injection only case is estimated to provide annualized cost savings compared to a nonintegrated design. Process simulation modeling is shown to be a useful tool for evaluation and screening of technology options. 27 refs., 3 figs., 4 tabs.

H. Christopher Frey; Yunhua Zhu [North Carolina State University, Raleigh, NC (United States). Department of Civil, Construction, and Environmental Engineering

2006-03-01

27

Improved system integration for integrated gasification combined cycle (IGCC) systems.  

PubMed

Integrated gasification combined cycle (IGCC) systems are a promising technology for power generation. They include an air separation unit (ASU), a gasification system, and a gas turbine combined cycle power block, and feature competitive efficiency and lower emissions compared to conventional power generation technology. IGCC systems are not yet in widespread commercial use and opportunities remain to improve system feasibility via improved process integration. A process simulation model was developed for IGCC systems with alternative types of ASU and gas turbine integration. The model is applied to evaluate integration schemes involving nitrogen injection, air extraction, and combinations of both, as well as different ASU pressure levels. The optimal nitrogen injection only case in combination with an elevated pressure ASU had the highest efficiency and power output and approximately the lowest emissions per unit output of all cases considered, and thus is a recommended design option. The optimal combination of air extraction coupled with nitrogen injection had slightly worse efficiency, power output, and emissions than the optimal nitrogen injection only case. Air extraction alone typically produced lower efficiency, lower power output, and higher emissions than all other cases. The recommended nitrogen injection only case is estimated to provide annualized cost savings compared to a nonintegrated design. Process simulation modeling is shown to be a useful tool for evaluation and screening of technology options. PMID:16568789

Frey, H Christopher; Zhu, Yunhua

2006-03-01

28

Damage monitoring of refractory wall in a generic entrained-bed slagging gasification system  

E-print Network

791 Damage monitoring of refractory wall in a generic entrained-bed slagging gasification system-bed slagging gasification systems is attributed to evolution of structural damage in the refractory walls. Early detection of such damage is necessary to avert unscheduled shutdown of a gasification plant

Ray, Asok

29

Industrial and Systems engineering  

E-print Network

Industrial and Systems engineering COLLEGE of ENGINEERING DepartmentofIndustrialandSystemsEngineering EDGE Engineering Entrepreneur Certificate Program is a great addition to an industrial and systems to expert clinical recommendations. engineering.wayne.edu/isefaculty Industrial and systems engineering

Berdichevsky, Victor

30

Southern cone energy network coal gasification for SNG production and pipeline system feasibility study (Brazil). Volume 2. Export trade information  

SciTech Connect

Part I of the volume reports on the coal gasification plant study performed by the Advanced Technology Division of Fluor Engineers and Constructors, Inc., together with information on coal resources and markets, gas demand, and by-product markets provided by Jaakko Poyry. Jaakko Poyry also supported the study with site, cost, economic, and other required local Brazilian data. Part II of the volume presents the results of Fluor's study of an SNG gas transport and gas distribution system. Also included are the results of an alternate study into barging coal north to a gasification plant located in the Santos area.

Not Available

1992-08-01

31

ENVIRONMENTAL ASSESSMENT REPORT: WELLMAN-GALUSHA LOW-BTU GASIFICATION SYSTEMS  

EPA Science Inventory

The report, an Environmental Assessment Report (EAR) for Wellman-Galusha low-Btu gasification systems, is part of an overall environmental assessment program for low-medium-Btu gasification technology. This EAR provides EPA administrators and program offices with a document repre...

32

Coal Integrated Gasification Fuel Cell System Study. Pre-Baseline Topical Report for April 2003 to July 2003.  

National Technical Information Service (NTIS)

The pre-baseline configuration for an Integrated Gasification Fuel Cell (IGFC) system has been developed. This case uses current gasification, clean-up, gas turbine, and bottoming cycle technologies together with projected large planar Solid Oxide Fuel Ce...

G. Wotzak, C. Balan, F. Rahman, N. Minh

2003-01-01

33

Multizone ultrasonic thermometry with application to coal gasification systems  

SciTech Connect

The decrease of sound velocity with temperature in solid media is utilized in ultrasonic thermometry. A multizone sensor generally consists of a thin rod on which small notches are made to partition the sensor length into various zones. The change of acoustic impedance at the notches causes the sound waves to be partly reflected back, and the measurement of time intervals between the successive pairs of reflected signals provides an indication of the average temperatures in the corresponding zones. This paper addresses the application of ultrasonic senses to temperature profiling in the reactors of coal gasification systems. In particular, results on the sensor development, materials testing, and signal processing are presented. 14 references, 8 figures, 1 table.

Gopalsami, N.; Raptis, A.C.

1984-02-01

34

DIFFUSION COATINGS FOR CORROSION RESISTANT COMPONENTS IN COAL GASIFICATION SYSTEMS  

SciTech Connect

Heat-exchangers, filters, turbines, and other components in integrated coal gasification combined cycle system must withstand demanding conditions of high temperatures and pressure differentials. Under the highly sulfiding conditions of the high temperature coal gas, the performance of components degrade significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low cost alloy may improve is resistance to such sulfidation attack and decrease capital and operating costs. A review of the literature indicates that the corrosion reaction is the competition between oxidation and sulfidation reactions. The Fe- and Ni-based high-temperature alloys are susceptible to sulfidation attack unless they are fortified with high levels of Cr, Al, and Si. To impart corrosion resistance, these elements need not be in the bulk of the alloy and need only be present at the surface layers.

Gopala N. Krishnan; Ripudaman Malhotra; Angel Sanjurjo

2004-05-01

35

Development of a Segregated Municipal Solid Waste Gasification System for Electrical Power Generation  

E-print Network

............................................................................................................ 17 Biomass Gasifier Used in the Study ..................................................................... 17 Instrumentation for Measurement and Control of the Gasification System ......... 19 Installation of the Control Devices... Methodology .......................................................................................................... 111 Composition and Characteristics of the Biomass and Ash ................................ 111 Slagging and Fouling Indices Calculations...

Maglinao, Amado Latayan

2013-04-11

36

FEED SYSTEM INNOVATION FOR GASIFICATION OF LOCALLY ECONOMICAL ALTERNATIVE FUELS (FIGLEAF)  

SciTech Connect

The Feed System Innovation for Gasification of Locally Economical Alternative Fuels (FIGLEAF) project was conducted by the Energy & Environmental Research Center and Gasification Engineering Corporation of Houston, Texas (a subsidiary of Global Energy Inc., Cincinnati, Ohio), with 80% cofunding from the U.S. Department of Energy (DOE). The goal of the project was to identify and evaluate low-value fuels that could serve as alternative feedstocks and to develop a feed system to facilitate their use in integrated gasification combined-cycle and gasification coproduction facilities. The long-term goal, to be accomplished in a subsequent project, is to install a feed system for the selected fuel(s) at Global Energy's commercial-scale 262-MW Wabash River Coal Gasification Facility in West Terre Haute, Indiana. The feasibility study undertaken for the project consisted of identifying and evaluating the economic feasibility of potential fuel sources, developing a feed system design capable of providing a fuel at 400 psig to the second stage of the E-Gas (Destec) gasifier to be cogasified with coal, performing bench- and pilot-scale testing to verify concepts and clarify decision-based options, reviewing information on high-pressure feed system designs, and determining the economics of cofeeding alternative feedstocks with the conceptual feed system design. A preliminary assessment of feedstock availability within Indiana and Illinois was conducted. Feedstocks evaluated included those with potential tipping fees to offset processing cost: sewage sludge, municipal solid waste, used railroad ties, urban wood waste (UWW), and used tires/tire-derived fuel. Agricultural residues and dedicated energy crop fuels were not considered since they would have a net positive cost to the plant. Based on the feedstock assessment, sewage sludge was selected as the primary feedstock for consideration at the Wabash River Plant. Because of the limited waste heat available for drying and the ability of the gasifier to operate with alternative feedstocks at up to 80% moisture, a decision was made to investigate a pumping system for delivering the as-received fuel across the pressure boundary into the second stage of the gasifier. A high-pressure feed pump and fuel dispersion nozzles were tested for their ability to cross the pressure boundary and adequately disperse the sludge into the second stage of the gasifier. These results suggest that it is technically feasible to get the sludge dispersed to an appropriate size into the second stage of the gasifier although the recycle syngas pressure needed to disperse the sludge would be higher than originally desired. A preliminary design was prepared for a sludge-receiving, storage, and high-pressure feeding system at the Wabash River Plant. The installed capital costs were estimated at approximately $9.7 million, within an accuracy of {+-}10%. An economic analysis using DOE's IGCC Model, Version 3 spreadsheet indicates that in order to justify the additional capital cost of the system, Global Energy would have to receive a tipping fee of $12.40 per wet ton of municipal sludge delivered. This is based on operation with petroleum coke as the primary fuel. Similarly, with coal as the primary fuel, a minimum tipping of $16.70 would be required. The availability of delivered sludge from Indianapolis, Indiana, in this tipping-fee range is unlikely; however, given the higher treatment costs associated with sludge treatment in Chicago, Illinois, delivery of sludge from Chicago, given adequate rail access, might be economically viable.

Michael L. Swanson; Mark A. Musich; Darren D. Schmidt; Joseph K. Schultz

2003-02-01

37

FEED SYSTEM INNOVATION FOR GASIFICATION OF LOCALLY ECONOMICAL ALTERNATIVE FUELS (FIGLEAF)  

SciTech Connect

The Feed System Innovation for Gasification of Locally Economical Alternative Fuels (FIGLEAF) project is being conducted by the Energy and Environmental Research Center and Gasification Engineering Corporation of Houston, Texas (a subsidiary of Global Energy Inc., Cincinnati, Ohio), with 80% cofunding from the U.S. Department of Energy. The goal of the project is to identify and evaluate low-value fuels that could serve as alternative feedstocks and to develop a feed system to facilitate their use in integrated gasification combined cycle and gasification coproduction facilities. The long-term goal, to be accomplished in a subsequent project, is to install a feed system for the selected fuels at Global Energy's commercial-scale 262-MW Wabash River Coal Gasification Facility in West Terre Haute, Indiana. The feasibility study undertaken for the project consists of identifying and evaluating the economic feasibility of potential fuel sources, developing a feed system design capable of providing a fuel at 400 psig to the second stage of the E-Gas (Destec) gasifier to be cogasified with coal at up to 30% on a Btu basis, performing bench- and pilot-scale testing to verify concepts and clarify decision-based options, reviewing prior art with respect to high-pressure feed system designs, and determining the economics of cofeeding alternative feedstocks with the conceptual feed system design. Activities and results thus far include the following. Several potential alternative fuels have been obtained for evaluation and testing as potential feedstocks, including sewage sludge, used railroad ties, urban wood waste, municipal solid waste, and used waste tires/tire-derived fuel. Only fuels with potential tipping fees were considered; potential energy crop fuels were not considered since they would have a net positive cost to the plant. Based on the feedstock assessment, sewage sludge has been selected as one of the primary feedstocks for consideration at the Wabash plant. Because of the limited waste heat available for drying and the ability of the gasifier to operate with alternative feedstocks at up to 80% moisture, a decision was made to investigate a pumping system for delivering the as-received fuel across the pressure boundary. High-temperature drop-tube furnace tests were conducted to determine if explosive fragmentation of high-moisture sludge droplets could be expected, but showed that these droplets underwent a shrinking and densification process that implies that the sludge will have to be well dispersed when injected into the gasifier. Fuel dispersion nozzles have been obtained for measuring how well the sludge can be dispersed in the second stage of the gasifier. Future work will include leasing a Schwing America pump to test pumping sewage sludge against 400 psig. In addition, sludge dispersion testing will be completed using two different dispersion nozzles to determine their ability to generate sludge particles small enough to be entrained out of the E-Gas entrained-flow gasifier.

Michael L. Swanson; Mark A. Musich; Darren D. Schmidt

2001-11-01

38

Diffusion Coatings for Corrosion Resistant Components in Coal Gasification Systems  

SciTech Connect

Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low cost alloy may improve its resistance to such sulfidation attack and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. During this reporting period we focused on getting a bench-scale test system to expose alloy coupons to simulated gasifier environment. The test facility was designed to allow about 20 specimen coupons to be exposed simultaneously for an extend period to a simulated coal gas stream at temperatures up to 1000 C. The simulated gas stream contained about 26%H{sub 2}, 39%CO, 17%CO{sub 2}, 1.4% H{sub 2}S and balance steam. We successfully ran a 100+h test with coated and uncoated stainless steel coupons. The tested alloys include SS304, SS316, SS405, SS409, SS410, and IN800. The main finding is that Ti/Ta coating provides excellent protection to SS405 under conditions where uncoated austenitic and ferritic stainless steel alloy coupons are badly corroded. Cr coatings also appear to afford some protection against corrosion.

Gopala N. Krishnan; Ripudaman Malhotra; Esperanza Alvarez; Kai-Hung Lau; Angel Sanjurjo

2005-01-01

39

Systems engineering management plans  

Microsoft Academic Search

The Systems Engineering Management Plan (SEMP) is a comprehensive and effective tool used to assist in the management of systems engineering efforts. It is intended to guide the work of all those involved in the project. The SEMP is comprised of three main sections: technical project planning and control, systems engineering process, and engineering specialty integration. The contents of each

Tamara S

2009-01-01

40

DIFFUSION COATINGS FOR CORROSION RESISTANT COMPONENTS IN COAL GASIFICATION SYSTEMS  

SciTech Connect

Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low cost alloy may improve is resistance to such sulfidation attack and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. A review of the literature indicated that the Fe- and Ni-based high-temperature alloys are susceptible to sulfidation attack unless they are fortified with high levels of Cr, Al, and Si. To impart corrosion resistance, these elements need not be in the bulk of the alloy and need only be present at the surface layers. We selected diffusion coatings of Cr and Al, and surface coatings of Si and Ti for the preliminary testing. These coatings will be applied using the fluidized bed chemical vapor deposition technique developed at SRI which is rapid and relatively inexpensive. We have procured coupons of typical alloys used in a gasifier. These coupons will be coated with Cr, Al, Si, and Ti. The samples will be tested in a bench-scale reactor using simulated coal gas compositions. In addition, we will be sending coated samples for insertion in the gas stream of the coal gasifier.

Gopala N. Krishnan; Ripudaman Malhotra; Angel Sanjurjo

2004-05-01

41

A continuous two stage solar coal gasification system  

NASA Astrophysics Data System (ADS)

The characteristics of a two-stage fluidized-bed hybrid coal gasification system to produce syngas from coal, lignite, and peat are described. Devolatilization heat of 823 K is supplied by recirculating gas heated by a solar receiver/coal heater. A second-stage gasifier maintained at 1227 K serves to crack remaining tar and light oil to yield a product free from tar and other condensables, and sulfur can be removed by hot clean-up processes. CO is minimized because the coal is not burned with oxygen, and the product gas contains 50% H2. Bench scale reactors consist of a stage I unit 0.1 m in diam which is fed coal 200 microns in size. A stage II reactor has an inner diam of 0.36 m and serves to gasify the char from stage I. A solar power source of 10 kWt is required for the bench model, and will be obtained from a central receiver with quartz or heat pipe configurations for heat transfer.

Mathur, V. K.; Breault, R. W.; Lakshmanan, S.; Manasse, F. K.; Venkataramanan, V.

42

Power Systems Development Facility Gasification Test Run TC08  

SciTech Connect

This report discusses Test Campaign TC08 of the Kellogg Brown & Root, Inc. (KBR) Transport Gasifier train with a Siemens Westinghouse Power Corporation (Siemens Westinghouse) particle filter system at the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama. The Transport Gasifier is an advanced circulating fluidized-bed gasifier designed to operate as either a combustor or a gasifier in air- or oxygen-blown mode using a particulate control device (PCD). The Transport Gasifier was operated as a pressurized gasifier in air- and oxygen-blown modes during TC08. Test Run TC08 was started on June 9, 2002 and completed on June 29. Both gasifier and PCD operations were stable during the test run with a stable baseline pressure drop. The oxygen feed supply system worked well and the transition from air to oxygen blown was smooth. The gasifier temperature was varied between 1,710 and 1,770 F at pressures from 125 to 240 psig. The gasifier operates at lower pressure during oxygen-blown mode due to the supply pressure of the oxygen system. In TC08, 476 hours of solid circulation and 364 hours of coal feed were attained with 153 hours of pure oxygen feed. The gasifier and PCD operations were stable in both enriched air and 100 percent oxygen blown modes. The oxygen concentration was slowly increased during the first transition to full oxygen-blown operations. Subsequent transitions from air to oxygen blown could be completed in less than 15 minutes. Oxygen-blown operations produced the highest synthesis gas heating value to date, with a projected synthesis gas heating value averaging 175 Btu/scf. Carbon conversions averaged 93 percent, slightly lower than carbon conversions achieved during air-blown gasification.

Southern Company Services

2002-06-30

43

Program (systems) engineering  

NASA Technical Reports Server (NTRS)

Program Systems Engineering applies the principles of Systems Engineering at the program level. Space programs are composed of interrelated elements which can include collections of projects, advanced technologies, information systems, etc. Some program elements are outside traditional engineering's physical systems, such as education and public outreach, public relations, resource flow, and interactions within the political environments.

Baroff, Lynn E.; Easter, Robert W.; Pomphrey, Richard B.

2004-01-01

44

Coal Gasification and Coal Hydrogenation.  

National Technical Information Service (NTIS)

The present state of the development works on the coal gasification and coal hydrogenation processes carried out by the coal producing and engineering companies is presented. The coal gasification projects are the following: Texaco suspended dust gasifica...

1980-01-01

45

GASIFICATION FOR DISTRIBUTED GENERATION  

SciTech Connect

A recent emphasis in gasification technology development has been directed toward reduced-scale gasifier systems for distributed generation at remote sites. The domestic distributed power generation market over the next decade is expected to be 5-6 gigawatts per year. The global increase is expected at 20 gigawatts over the next decade. The economics of gasification for distributed power generation are significantly improved when fuel transport is minimized. Until recently, gasification technology has been synonymous with coal conversion. Presently, however, interest centers on providing clean-burning fuel to remote sites that are not necessarily near coal supplies but have sufficient alternative carbonaceous material to feed a small gasifier. Gasifiers up to 50 MW are of current interest, with emphasis on those of 5-MW generating capacity. Internal combustion engines offer a more robust system for utilizing the fuel gas, while fuel cells and microturbines offer higher electric conversion efficiencies. The initial focus of this multiyear effort was on internal combustion engines and microturbines as more realistic near-term options for distributed generation. In this project, we studied emerging gasification technologies that can provide gas from regionally available feedstock as fuel to power generators under 30 MW in a distributed generation setting. Larger-scale gasification, primarily coal-fed, has been used commercially for more than 50 years to produce clean synthesis gas for the refining, chemical, and power industries. Commercial-scale gasification activities are under way at 113 sites in 22 countries in North and South America, Europe, Asia, Africa, and Australia, according to the Gasification Technologies Council. Gasification studies were carried out on alfalfa, black liquor (a high-sodium waste from the pulp industry), cow manure, and willow on the laboratory scale and on alfalfa, black liquor, and willow on the bench scale. Initial parametric tests evaluated through reactivity and product composition were carried out on thermogravimetric analysis (TGA) equipment. These tests were evaluated and then followed by bench-scale studies at 1123 K using an integrated bench-scale fluidized-bed gasifier (IBG) which can be operated in the semicontinuous batch mode. Products from tests were solid (ash), liquid (tar), and gas. Tar was separated on an open chromatographic column. Analysis of the gas product was carried out using on-line Fourier transform infrared spectroscopy (FT-IR). For selected tests, gas was collected periodically and analyzed using a refinery gas analyzer GC (gas chromatograph). The solid product was not extensively analyzed. This report is a part of a search into emerging gasification technologies that can provide power under 30 MW in a distributed generation setting. Larger-scale gasification has been used commercially for more than 50 years to produce clean synthesis gas for the refining, chemical, and power industries, and it is probable that scaled-down applications for use in remote areas will become viable. The appendix to this report contains a list, description, and sources of currently available gasification technologies that could be or are being commercially applied for distributed generation. This list was gathered from current sources and provides information about the supplier, the relative size range, and the status of the technology.

Ronald C. Timpe; Michael D. Mann; Darren D. Schmidt

2000-05-01

46

Engineering Industrial & Systems  

E-print Network

Industrial Engineering Department of Industrial & Systems Engineering Leslie Monplaisir, Ph powerful tool sets used in industry today. -Brent Gillett, BSIE 2007 Advanced Planning Engineer at BMW I is available at: http://ise.wayne.edu/bs-industrial/index What is Industrial Engineering? The industrial

Berdichevsky, Victor

47

Advanced hybrid gasification facility  

SciTech Connect

The objective of this procurement is to provide a test facility to support early commercialization of advanced fixed-bed coal gasification technology for electric power generation applications. The proprietary CRS Sirrine Engineers, Inc. PyGas{trademark} staged gasifier has been selected as the initial gasifier to be developed under this program. The gasifier is expected to avoid agglomeration when used on caking coals. It is also being designed to crack tar vapors and ammonia, and to provide an environment in which volatilized alkali may react with aluminosilicates in the coal ash thereby minimizing their concentration in the hot raw coal gas passing through the system to the gas turbine. This paper describes a novel, staged, airblown, fixed-bed gasifier designed to solve both through the incorporation of pyrolysis (carbonization) with gasification. It employs a pyrolyzer (carbonizer) to avoid sticky coal agglomeration which occurs in a fixed-bed process when coal is gradually heated through the 400{degrees}F to 900{degrees}F range. In a pyrolyzer, the coal is rapidly heated such that coal tar is immediately vaporized. Gaseous tars are then thermally cracked prior to the completion of the gasification process. During the subsequent endothermic gasification reactions, volatilized alkali can be chemically bound to aluminosilicates in (or added to) the ash. To reduce NOx from fuel home nitrogen, moisture is minimized to control ammonia generation, and HCN in the upper gasifier region is partially oxidized to NO which reacts with NH3/HCN to form N2.

Sadowski, R.S.; Skinner, W.H. [CRS Sirrine, Inc., Greenville, SC (United States); Johnson, S.A. [PSI Technology Co., Andover, MA (United States); Dixit, V.B. [Riley Stoker Corp., Worcester, MA (United States). Riley Research Center

1993-08-01

48

Combustion Engineering Integrated Coal Gasification Combined Cycle Repowering Project: Clean Coal Technology Program  

SciTech Connect

On February 22, 1988, DOE issued Program Opportunity Notice (PON) Number-DE-PS01-88FE61530 for Round II of the CCT Program. The purpose of the PON was to solicit proposals to conduct cost-shared ICCT projects to demonstrate technologies that are capable of being commercialized in the 1990s, that are more cost-effective than current technologies, and that are capable of achieving significant reduction of SO[sub 2] and/or NO[sub x] emissions from existing coal burning facilities, particularly those that contribute to transboundary and interstate pollution. The Combustion Engineering (C-E) Integrated Coal Gasification Combined Cycle (IGCC) Repowering Project was one of 16 proposals selected by DOE for negotiation of cost-shared federal funding support from among the 55 proposals that were received in response to the PON. The ICCT Program has developed a three-level strategy for complying with the National Environmental Policy Act (NEPA) that is consistent with the President's Council on Environmental Quality regulations implementing NEPA (40 CFR 1500-1508) and the DOE guidelines for compliance with NEPA (10 CFR 1021). The strategy includes the consideration of programmatic and project-specific environmental impacts during and subsequent to the reject selection process.

Not Available

1992-03-01

49

Industrial & Systems Engineering Areas of Engineering Interests  

E-print Network

Industrial & Systems Engineering Areas of Engineering Interests The Department of Industrial and Systems Engineering understands our students may work as Industrial Engineers in other engineering industries, and to help prepare them for these careers, the ISE Areas of Interest was formulated. The courses

Berdichevsky, Victor

50

Systems Engineering Handbook Foreword ................................ ................................ ................................ ............................ ix  

E-print Network

NASA Systems Engineering Handbook SP-610S June 1995 #12;Contents Foreword ................................ ................................ ................................ .... 1 Fundamentals of System Engineering ................................ ............................ 3 Definition of Systems Engineering

Rhoads, James

51

Systems Science and Engineering  

E-print Network

447 Systems Science and Industrial Engineering UNDERGRADUATE PROGRAMS The bachelor of science-Year Engineering Science Association (TYESA) agreement with community colleges in New York state. The emphasis with industry. The primary goal is to prepare the industrial and systems engineering bachelor of science

Suzuki, Masatsugu

52

Engineering scalable biological systems  

E-print Network

Synthetic biology is focused on engineering biological organisms to study natural systems and to provide new solutions for pressing medical, industrial, and environmental problems. At the core of engineered organisms are ...

Lu, Timothy K.

53

Application of a detailed dimensional solid oxide fuel cell model in integrated gasification fuel cell system design and analysis  

Microsoft Academic Search

Integrated gasification fuel cell (IGFC) systems that combine coal gasification and solid oxide fuel cells (SOFC) are promising for highly efficient and environmentally sensitive utilization of coal for power production. Most IGFC system analysis efforts performed to-date have employed non-dimensional SOFC models, which predict SOFC performance based upon global mass and energy balances that do not resolve important intrinsic constraints

Mu Li; Jacob Brouwer; Ashok D. Rao; G. Scott Samuelsen

2011-01-01

54

DEPARTMENT CHAIR Engineering Management & Systems Engineering Department  

E-print Network

DEPARTMENT CHAIR Engineering Management & Systems Engineering Department Old Dominion University, Norfolk VA The Batten College of Engineering and Technology at Old Dominion University in Norfolk, VA, Dean's Office, 102 Kaufman Hall, Old Dominion University, Norfolk, VA 23529. Review of applications

55

INDUSTRIAL&SYSTEMS Industrial and Systems engineers use engineering  

E-print Network

78 INDUSTRIAL&SYSTEMS Industrial and Systems engineers use engineering and business principles companies compete in today's global marketplace. The Industrial and Systems engineer's task is to take of industries including consulting, technology development, software, supply chain manufacturing, engineering

Rohs, Remo

56

Unified Engineering Software System  

NASA Technical Reports Server (NTRS)

Collection of computer programs performs diverse functions in prototype engineering. NEXUS, NASA Engineering Extendible Unified Software system, is research set of computer programs designed to support full sequence of activities encountered in NASA engineering projects. Sequence spans preliminary design, design analysis, detailed design, manufacturing, assembly, and testing. Primarily addresses process of prototype engineering, task of getting single or small number of copies of product to work. Written in FORTRAN 77 and PROLOG.

Purves, L. R.; Gordon, S.; Peltzman, A.; Dube, M.

1989-01-01

57

TREATMENT OF AQUEOUS WASTE STREAMS FROM KRW ENERGY SYSTEMS COAL GASIFICATION TECHNOLOGY  

EPA Science Inventory

The paper gives results of a bench-scale evaluation to determine the extent to which process wastewaters from the KRW Energy Systems coal gasification process are treatable using commercially proven wastewater treatment technology. (NOTE: The process--formerly called the Westingh...

58

Computer simulation of a biomass gasification-solid oxide fuel cell power system using Aspen Plus  

Microsoft Academic Search

The operation and performance of a SOFC (solid oxide fuel cell) stack on biomass syn-gas from a biomass gasification CHP (combined heat and power) plant is investigated. The objective of this work is to develop a model of a biomass-SOFC system capable of predicting performance under diverse operating conditions. The tubular SOFC technology is selected. The SOFC stack model, equilibrium

Wayne Doherty; Anthony Reynolds; David Kennedy

2010-01-01

59

Proceedings of the seventh annual gasification and gas stream cleanup systems contractors review meeting: Volume 2  

SciTech Connect

On June 16 through 19, 1987, METC sponsored the Seventh Annual Gasification and Gas Stream Cleanup Systems Contractors Review Meeting which was held at the Sheraton Lakeview Conference Center in Morgantown, West Virginia. The primary purpose of the meeting was threefold: to review the technical progress and current status of the gasification and gas stream cleanup projects sponsored by the Department of Energy; to foster technology exchange among participating researchers and other technical communities; to facilitate interactive dialogues which would identify research needs that would make coal-based gasification systems more attractive economically and environmentally. More than 310 representatives of Government, academia, industry, and foreign energy research organizations attended the 4-day meeting. Fifty-three papers and thirty poster dsplays were presented summarizing recent developments in the gasification and gas stream cleanup programs. Volume II covers papers presented at sessions 5 and 6 on system for the production of synthesis gas, and on system for the production of power. All papers have been processed for inclusion in the Energy Data Base.

Ghate, M.R.; Markel, K.E. Jr.; Jarr, L.A.; Bossart, S.J. (eds.)

1987-08-01

60

Nuclear propulsion systems engineering  

SciTech Connect

The Nuclear Energy for Rocket Vehicle Application (NERVA) program of the 1960`s and early 1970`s was dramatically successful, with no major failures during the entire testing program. This success was due in large part to the successful development of a systems engineering process. Systems engineering, properly implemented, involves all aspects of the system design and operation, and leads to optimization of theentire system: cost, schedule, performance, safety, reliability, function, requirements, etc. The process must be incorporated from the very first and continued to project completion. This paper will discuss major aspects of the NERVA systems engineering effort, and consider the implications for current nuclear propulsion efforts.

Madsen, W.W.; Neuman, J.E.: Van Haaften, D.H.

1992-12-31

61

Nuclear propulsion systems engineering  

SciTech Connect

The Nuclear Energy for Rocket Vehicle Application (NERVA) program of the 1960's and early 1970's was dramatically successful, with no major failures during the entire testing program. This success was due in large part to the successful development of a systems engineering process. Systems engineering, properly implemented, involves all aspects of the system design and operation, and leads to optimization of theentire system: cost, schedule, performance, safety, reliability, function, requirements, etc. The process must be incorporated from the very first and continued to project completion. This paper will discuss major aspects of the NERVA systems engineering effort, and consider the implications for current nuclear propulsion efforts.

Madsen, W.W.; Neuman, J.E.: Van Haaften, D.H.

1992-01-01

62

Systems Engineering Research in the Engineering Systems Context  

E-print Network

Systems Engineering Research in the Engineering Systems Context: Value-Driven Architecting and Design of Engineering Systems Presented by: Dr. Donna H. Rhodes and Dr. Adam M. Ross Massachusetts Topics PART I. Systems Engineering Research in the Engineering Systems Context � Brief Overview

de Weck, Olivier L.

63

INDUSTRIAL&SYSTEMS Industrial and Systems engineers use engineering  

E-print Network

78 INDUSTRIAL&SYSTEMS Industrial and Systems engineers use engineering and business principles companies compete in today's global marketplace. The Industrial and Systems engineer's task is to take · Industrial and Systems Engineering Bachelor of Science 128 units · Industrial and Systems Engineering

Rohs, Remo

64

INDUSTRIAL & SYSTEMS Industrial and Systems engineers use engineering  

E-print Network

78 INDUSTRIAL & SYSTEMS Industrial and Systems engineers use engineering and business principles companies compete in todays global marketplace. The Industrial and Systems engineers task is to take limited Industrial and Systems Engineering Bachelor of Science 128 units Industrial and Systems Engineering

Rohs, Remo

65

Developing Data System Engineers  

NASA Astrophysics Data System (ADS)

In the early days of general computer systems for science data processing, staff members working on NASA's data systems would most often be hired as mathematicians. Computer engineering was very often filled by those with electrical engineering degrees. Today, the Goddard Space Flight Center has special position descriptions for data scientists or as they are more commonly called: data systems engineers. These staff members are required to have very diverse skills, hence the need for a generalized position description. There is always a need for data systems engineers to develop, maintain and operate the complex data systems for Earth and space science missions. Today's data systems engineers however are not just mathematicians, they are computer programmers, GIS experts, software engineers, visualization experts, etc... They represent many different degree fields. To put together distributed systems like the NASA Earth Observing Data and Information System (EOSDIS), staff are required from many different fields. Sometimes, the skilled professional is not available and must be developed in-house. This paper will address the various skills and jobs for data systems engineers at NASA. Further it explores how to develop staff to become data scientists.

Behnke, J.; Byrnes, J. B.; Kobler, B.

2011-12-01

66

ADVANCED GASIFICATION-BASED FUEL CONVERSION AND ELECTRIC ENERGY PRODUCTION SYSTEM  

SciTech Connect

Boise Paper Solutions and the Gas Technology Institute (GTI) are cooperating to develop, demonstrate and place in continuous operation an advanced biomass gasification-based power generation system suitable for near-term commercial deployment in the Forest Products Industry. The system will be used in conjunction with, rather than in place of, existing wood waste fired boilers and flue gas cleanup systems. The novel system will include three advanced technological components based on GTI's RENUGAS{reg_sign} and three-stage stoker combustion technologies, and a gas turbine-based power generation concept developed in DOE's High Performance Power System (HIPPS) program. The system has, as its objective, to avoid the major hurdles of high-pressure gasification, i.e., high-pressure fuel feeding and ash removal, and hot gas cleaning that are typical for conventional IGCC power generation. It aims to also minimize capital intensity and technology risks. The system is intended to meet the immediate needs of the forest products industry for highly efficient and environmentally friendly electricity and steam generation systems utilizing existing wood waste as fuel resources. The overall objective of this project is to demonstrate the commercial applicability of an advanced biomass gasification-based power generation system at Boise Paper Solutions' pulp and paper mill located at DeRidder, Louisiana.

Joseph Rabovitser; Bruce Bryan

2002-10-01

67

Combustion engine system  

NASA Technical Reports Server (NTRS)

A flow through catalytic reactor which selectively catalytically decomposes methanol into a soot free hydrogen rich product gas utilizing engine exhaust at temperatures of 200 to 650 C to provide the heat for vaporizing and decomposing the methanol is described. The reactor is combined with either a spark ignited or compression ignited internal combustion engine or a gas turbine to provide a combustion engine system. The system may be fueled entirely by the hydrogen rich gas produced in the methanol decomposition reactor or the system may be operated on mixed fuels for transient power gain and for cold start of the engine system. The reactor includes a decomposition zone formed by a plurality of elongated cylinders which contain a body of vapor permeable, methanol decomposition catalyst preferably a shift catalyst such as copper-zinc.

Houseman, John (inventor); Voecks, Gerald E. (inventor)

1986-01-01

68

A study on a multi-stage hybrid gasifier-engine system  

Microsoft Academic Search

This paper presents the results of a study on a multi-stage hybrid biomass–charcoal gasification to produce low tar content gas for engine application using coconut shell as a fuel. The performance of a gasifier-engine system consisting of the hybrid biomass–charcoal gasifier, a gas cleaning\\/cooling system and a diesel engine is also discussed.The lowest tar content found in hybrid coconut shell-charcoal

S. C Bhattacharya; San Shwe Hla; Hoang-Luang Pham

2001-01-01

69

Basic design model of entrained-bed coal gasification system in IGCC power plant  

SciTech Connect

Proposed is the basic design model of entrained-bed coal gasification system, which will be a tool to identify the basic design parameters and the feasible operating range of each component in the system. The present design model is composed of three major design modules for coal/oxidizer burner nozzle, gasifier with refractory, preheater, slag discharge hopper and product gas quenching system. Each design module is constructed by incorporating lumped-mass based design approach with thermochemical data and relevant correlation in order to give the basic design specification of the component, and is then coupled together with other design module. Using the present design model, parametric studies are carried out to investigate the influences of gasification system design variables on the performance parameters of key component, and then scale-up analysis is performed to obtain design data for large scale IGCC (Integrated Gasification Combined Cycle) application. Furthermore, the present model will be combined with the data base of marketable products, from which designer can select the product suitable to the component design specification obtained from design modules.

Kim, H.T.; Kim, S.W.; Lee, C.

1996-12-31

70

industrial & systems Industrial and Systems engineers use engineering  

E-print Network

78 industrial & systems Industrial and Systems engineers use engineering and business principles companies compete in today's global marketplace. The Industrial and Systems engineer's task is to take to introduce the philosophy, subject matter, aims, goals, and techniques of industrial and systems engineering

Rohs, Remo

71

industrial & systems Industrial and Systems engineers use engineering  

E-print Network

78 industrial & systems Industrial and Systems engineers use engineering and business principles companies compete in today's global marketplace. The Industrial and Systems engineer's task is to take s e n G i n e e r i n G ( i s e ) ISE 105 Introduction to Industrial and Systems Engineering (2, Fa

Rohs, Remo

72

Energy impacts of controlling carbon dioxide emissions from an integrated gasification/combined-cycle system  

SciTech Connect

This paper presents results from a study of the impacts associated with CO{sub 2} recovery in integrated gasification/combined-cycle (IGCC) systems which is being conducted for the Morgantown Energy Technology Center by Argonne National Laboratory. The objective of the study is to compare, on a consistent systems-oriented basis, the energy and economic impacts of adding CO{sub 2} capture and sequestration to an IGCC system. The research reported here has emphasized commercial technologies for capturing CO{sub 2}, but ongoing work is also addressing advanced technologies under development and alternate power-system configurations that may enhance system efficiency.

Livengood, C.D.; Doctor, R.D.; Molburg, J.C.; Thimmapuram, P.

1994-08-01

73

Engineering scalable biological systems.  

PubMed

Synthetic biology is focused on engineering biological organisms to study natural systems and to provide new solutions for pressing medical, industrial and environmental problems. At the core of engineered organisms are synthetic biological circuits that execute the tasks of sensing inputs, processing logic and performing output functions. In the last decade, significant progress has been made in developing basic designs for a wide range of biological circuits in bacteria, yeast and mammalian systems. However, significant challenges in the construction, probing, modulation and debugging of synthetic biological systems must be addressed in order to achieve scalable higher-complexity biological circuits. Furthermore, concomitant efforts to evaluate the safety and biocontainment of engineered organisms and address public and regulatory concerns will be necessary to ensure that technological advances are translated into real-world solutions. PMID:21468204

Lu, Timothy K

2010-01-01

74

Preliminary results of an economic and engineering evaluation of the M.W. Kellogg air-blown gasification combined cycle  

SciTech Connect

The capital cost of a coal-based power plant contributes over 50% to the busbar cost of electricity. For new coal-based power plants to be competitive, it is imperative that the capital cost be reduced. Additionally, they must have excellent environmental performance and high cycle efficiency. One of the most cost-competitive, coal-based power plant technologies is believed to be an air-blown, combined cycle incorporating a partial gasifier and pressurized char combustor. These two coal-conversion stages provide fuel gas and vitiated air to fire a combustion turbine. To protect the turbine from particle erosion damage, all the dust must be removed from the two hot gas streams. This operation involves high-temperature, high-pressure (HTHP) filtration, a technology currently under development at several locations funded by the Department of Energy. One of these locations is the Power Systems Development Facility (PSDF) at Wilsonville, Alabama. At this same site two potential air-blown, coal-based combined cycle power plant technologies are under development. These are: the M.W. Kellogg Company`s (Kellogg) gasification combined cycle (GCC), incorporating their transport reactor design as both the gasifier and the combustor; and Foster Wheeler`s (FW) topped pressurized fluidized bed combustor (PFBC), incorporating a bubbling-bed carbonizer and a circulating PFBC. It was decided to complete an engineering and economic evaluation of the technologies under development at the PSDF. The results are to quantify the process economics, and to focus the supporting Research and Development activities on those areas offering the greatest economic advantage. This paper presents preliminary results from the evaluation of a Kellogg air-blow GCC unit. Capital cost and thermal performance data are presented along with costs of electricity based on recent fuel price projections for the US. Space limitations prevent presentation of the results for the FW advanced PFBC train and these will be reported at a later date. The economics of both processes are very similar.

Wheeldon, J.M.; Booras, G.S. [Electric Power Research Inst., Palo Alto, CA (United States); Styles, G.A.; Vansickle, R.J. [Southern Co. Services, Birmingham, AL (United States); Longanbach, J.; Mahajan, K. [Federal Energy Technology Center, Morgantown, WV (United States)

1998-12-31

75

Readings in Systems Engineering  

NASA Technical Reports Server (NTRS)

This present collection was inspired by seven papers prepared by the NASA Alumni League, illustrating the members' systems engineering experience. These papers make up the heart of this collection. We have supplemented them with papers describing industry processes and other governmental practices to illustrate the diversity of systems engineering as it is formulated and practiced. This is one discipline that clearly benefits from cross-fertilization and infusion of new ideas. There is also a wide variety of tools and techniques described herein, some standard and some unique.

Hoban, Francis T. (editor); Lawbaugh, William M. (editor)

1993-01-01

76

Engineering the earth system  

NASA Astrophysics Data System (ADS)

The post-war growth of the earth sciences has been fueled, in part, by a drive to quantify environmental insults in order to support arguments for their reduction, yet paradoxically the knowledge gained is grants us ever greater capability to deliberately engineer environmental processes on a planetary scale. Increased capability can arises though seemingly unconnected scientific advances. Improvements in numerical weather prediction such as the use of adjoint models in analysis/forecast systems, for example, means that weather modification can be accomplished with smaller control inputs. Purely technological constraints on our ability to engineer earth systems arise from our limited ability to measure and predict system responses and from limits on our ability to manage large engineering projects. Trends in all three constraints suggest a rapid growth in our ability to engineer the planet. What are the implications of our growing ability to geoengineer? Will we see a reemergence of proposals to engineer our way out of the climate problem? How can we avoid the moral hazard posed by the knowledge that geoengineering might provide a backstop to climate damages? I will speculate about these issues, and suggest some institutional factors that may provide a stronger constraint on the use of geoengineering than is provided by any purely technological limit.

Keith, D. W.

2005-12-01

77

Integration and testing of hot desulfurization and entrained flow gasification for power generation systems  

SciTech Connect

To help achieve the goal of clean, low cost power generation from coal, Texaco submitted an unsolicited proposal in July 1986 to develop and demonstrate the integration of high temperature desulfurization with the Texaco Coal Gasification Process (TCGP). The main goals of the proposed program were: Develop and demonstrate in-situ desulfurization of synthesis gas in an entrained flow gasifier using both air and oxygen gasification. Develop and demonstrate a high efficiency integrated system on a process development unit (PDU) scale which would include coal preparation, gasification, sulfur removal, particle and trace element removal and a gas turbine. In addition, secondary goals were proposed which would help further major research in which DOE/METC was already involved. These were: Test advanced instruments developed by METC for coal conversion processes. Screen alternative high temperature sulfur removal sorbents that could be used external to the gasifier. Development of these sorbents would provide a backup to the in-situ desulfurization approach. Accomplishments to date are presented.

Leininger, T.F.; Robin, A.; Jung, D.Y.; Kassman, J.S.; Wolfenbarger, J.K.; Yang, P.P.

1992-11-01

78

Integration and testing of hot desulfurization and entrained flow gasification for power generation systems. [Zinc titanates  

SciTech Connect

To help achieve the goal of clean, low cost power generation from coal, Texaco submitted an unsolicited proposal in July 1986 to develop and demonstrate the integration of high temperature desulfurization with the Texaco Coal Gasification Process (TCGP). The main goals of the proposed program were: Develop and demonstrate in-situ desulfurization of synthesis gas in an entrained flow gasifier using both air and oxygen gasification. Develop and demonstrate a high efficiency integrated system on a process development unit (PDU) scale which would include coal preparation, gasification, sulfur removal, particle and trace element removal and a gas turbine. In addition, secondary goals were proposed which would help further major research in which DOE/METC was already involved. These were: Test advanced instruments developed by METC for coal conversion processes. Screen alternative high temperature sulfur removal sorbents that could be used external to the gasifier. Development of these sorbents would provide a backup to the in-situ desulfurization approach. Accomplishments to date are presented.

Leininger, T.F.; Robin, A.; Jung, D.Y.; Kassman, J.S.; Wolfenbarger, J.K.; Yang, P.P.

1992-01-01

79

Performance evaluation of an integrated small-scale SOFC-biomass gasification power generation system  

NASA Astrophysics Data System (ADS)

The combination of biomass gasification and high-temperature solid oxide fuel cells (SOFCs) offers great potential as a future sustainable power generation system. In order to provide insights into an integrated small-scale SOFC-biomass gasification power generation system, system simulation was performed under diverse operating conditions. A detailed anode-supported planar SOFC model under co-flow operation and a thermodynamic equilibrium for biomass gasification model were developed and verified by reliable experimental and simulation data. The other peripheral components include three gas-to-gas heat exchangers (HXs), heat recovery steam generator (HRSG), burner, fuel and air compressors. To determine safe operating conditions with high system efficiency, energy and exergy analysis was performed to investigate the influence through detailed sensitivity analysis of four key parameters, e.g. steam-to-biomass ratio (STBR), SOFC inlet stream temperatures, fuel utilization factor (Uf) and anode off-gas recycle ratio (AGR) on system performance. Due to the fact that SOFC stack is accounted for the most expensive part of the initial investment cost, the number of cells required for SOFC stack is economically optimized as well. Through the detailed sensitivity analysis, it shows that the increase of STBR positively affects SOFC while gasifier performance drops. The most preferable operating STBR is 1.5 when the highest system efficiencies and the smallest number of cells. The increase in SOFC inlet temperature shows negative impact on system and gasifier performances while SOFC efficiencies are slightly increased. The number of cells required for SOFC is reduced with the increase of SOFC inlet temperature. The system performance is optimized for Uf of 0.75 while SOFC and system efficiencies are the highest with the smallest number of cells. The result also shows the optimal anode off-gas recycle ratio of 0.6. Regarding with the increase of anode off-gas recycle ratio, there is a trade-off between overall efficiencies and the number of SOFC cells.

Wongchanapai, Suranat; Iwai, Hiroshi; Saito, Motohiro; Yoshida, Hideo

2012-10-01

80

What is “engineering systems thinking”?  

Microsoft Academic Search

As technological systems grow larger, more complex, and interdisciplinary, electronics and hi-tech industries face a growing demand for engineers with a capacity for “engineering systems thinking”. This paper presents a multifunctional definition and 30 laws of “engineering systems thinking”. The definition and the laws are based on a study that its purpose was to identify the characteristics of engineers who

Moti Frank

2002-01-01

81

Developing systems engineers  

Microsoft Academic Search

Systems engineering is a critical capability for our organisation's business following good growth in business but also because of risks in certain areas. Indeed, SE is of national importance if we are to sustain growth in the face of complex technologies. Ironically, there is a global shortage of these skills. This paper briefly reviews why it is difficult to develop

Duarte Gonçalves

2008-01-01

82

Biological Systems Engineering Bioenvironmental Engineering Option  

E-print Network

(Organic Chemistry) 3 Micro 302 (Microorganisms) 1 Chem 231L (Organic Chemistry Lab) 1 Micro 302L Total Credits #12;Biological Systems Engineering Food Engineering Option 2013-2014 Catalog 128 Total of BSE) 4 Math 267 (Differential Equations) 3 Chem 231 (Organic Chemistry) 1 Chem 231L (Organic Chemistry

Lin, Zhiqun

83

NASA Systems Engineering Handbook  

NASA Technical Reports Server (NTRS)

This handbook is intended to provide general guidance and information on systems engineering that will be useful to the NASA community. It provides a generic description of Systems Engineering (SE) as it should be applied throughout NASA. A goal of the handbook is to increase awareness and consistency across the Agency and advance the practice of SE. This handbook provides perspectives relevant to NASA and data particular to NASA. The coverage in this handbook is limited to general concepts and generic descriptions of processes, tools, and techniques. It provides information on systems engineering best practices and pitfalls to avoid. There are many Center-specific handbooks and directives as well as textbooks that can be consulted for in-depth tutorials. This handbook describes systems engineering as it should be applied to the development and implementation of large and small NASA programs and projects. NASA has defined different life cycles that specifically address the major project categories, or product lines, which are: Flight Systems and Ground Support (FS&GS), Research and Technology (R&T), Construction of Facilities (CoF), and Environmental Compliance and Restoration (ECR). The technical content of the handbook provides systems engineering best practices that should be incorporated into all NASA product lines. (Check the NASA On-Line Directives Information System (NODIS) electronic document library for applicable NASA directives on topics such as product lines.) For simplicity this handbook uses the FS&GS product line as an example. The specifics of FS&GS can be seen in the description of the life cycle and the details of the milestone reviews. Each product line will vary in these two areas; therefore, the reader should refer to the applicable NASA procedural requirements for the specific requirements for their life cycle and reviews. The engineering of NASA systems requires a systematic and disciplined set of processes that are applied recursively and iteratively for the design, development, operation, maintenance, and closeout of systems throughout the life cycle of the programs and projects.

2007-01-01

84

Graduate Studies Transportation Systems Engineering  

E-print Network

for intermodal transportation, sustainable development and transporta- tion, application of geographicGraduate Studies Transportation Systems Engineering TRANSPORTATION SYSTEMS The transportation that transportation systems engineering can promote a thriving economy and a better quality of life by ensuring

Jacobs, Laurence J.

85

Evaluation of a Combined Cyclone and Gas Filtration System for Particulate Removal in the Gasification Process  

SciTech Connect

The Wabash gasification facility, owned and operated by sgSolutions LLC, is one of the largest single train solid fuel gasification facilities in the world capable of transforming 2,000 tons per day of petroleum coke or 2,600 tons per day of bituminous coal into synthetic gas for electrical power generation. The Wabash plant utilizes Phillips66 proprietary E-Gas (TM) Gasification Process to convert solid fuels such as petroleum coke or coal into synthetic gas that is fed to a combined cycle combustion turbine power generation facility. During plant startup in 1995, reliability issues were realized in the gas filtration portion of the gasification process. To address these issues, a slipstream test unit was constructed at the Wabash facility to test various filter designs, materials and process conditions for potential reliability improvement. The char filtration slipstream unit provided a way of testing new materials, maintenance procedures, and process changes without the risk of stopping commercial production in the facility. It also greatly reduced maintenance expenditures associated with full scale testing in the commercial plant. This char filtration slipstream unit was installed with assistance from the United States Department of Energy (built under DOE Contract No. DE-FC26-97FT34158) and began initial testing in November of 1997. It has proven to be extremely beneficial in the advancement of the E-Gas (TM) char removal technology by accurately predicting filter behavior and potential failure mechanisms that would occur in the commercial process. After completing four (4) years of testing various filter types and configurations on numerous gasification feed stocks, a decision was made to investigate the economic and reliability effects of using a particulate removal gas cyclone upstream of the current gas filtration unit. A paper study had indicated that there was a real potential to lower both installed capital and operating costs by implementing a char cyclonefiltration hybrid unit in the E-Gas (TM) gasification process. These reductions would help to keep the E-Gas (TM) technology competitive among other coal-fired power generation technologies. The Wabash combined cyclone and gas filtration slipstream test program was developed to provide design information, equipment specification and process control parameters of a hybrid cyclone and candle filter particulate removal system in the E-Gas (TM) gasification process that would provide the optimum performance and reliability for future commercial use. The test program objectives were as follows: 1. Evaluate the use of various cyclone materials of construction; 2. Establish the optimal cyclone efficiency that provides stable long term gas filter operation; 3. Determine the particle size distribution of the char separated by both the cyclone and candle filters. This will provide insight into cyclone efficiency and potential future plant design; 4. Determine the optimum filter media size requirements for the cyclone-filtration hybrid unit; 5. Determine the appropriate char transfer rates for both the cyclone and filtration portions of the hybrid unit; 6. Develop operating procedures for the cyclone-filtration hybrid unit; and, 7. Compare the installed capital cost of a scaled-up commercial cyclone-filtration hybrid unit to the current gas filtration design without a cyclone unit, such as currently exists at the Wabash facility.

Rizzo, Jeffrey J. [Phillips66 Company, West Terre Haute, IN (United States)

2010-04-30

86

Operating System Engineering  

NSDL National Science Digital Library

From MIT's extraordinary OpenCourseWare projects comes this computer science course focused on operating system engineering. Taught by Frans Kaashoek in the Fall of 2006, this course covers "virtual memory, kernel and user mode, system calls, threads, context switches, interrupts, interprocess communication, coordination of concurrent activities, and the interface between software and hardware" and the interaction between these processes. On the site, visitors will find the course syllabus, lecture notes, lab activities, assignments, exams, and related links and tools. This is a great site for educators to use to bolster or create their own computer science modules on operating systems.

Kaashoek, Frans, 1965-

2006-01-01

87

Modeling the Performance, Emissions, and Cost of an Entrained-Flow Gasification Combined Cycle System Using  

E-print Network

1 Modeling the Performance, Emissions, and Cost of an Entrained-Flow Gasification Combined Cycle Carolina State University ABSTRACT Gasification is a globally emerging technology in commercial markets of the most developed and versatile gasification technologies is based upon entrained-flow reactors, which

Frey, H. Christopher

88

Process Systems Engineering R&D for Advanced Fossil Energy Systems  

SciTech Connect

This presentation will examine process systems engineering R&D needs for application to advanced fossil energy (FE) systems and highlight ongoing research activities at the National Energy Technology Laboratory (NETL) under the auspices of a recently launched Collaboratory for Process & Dynamic Systems Research. The three current technology focus areas include: 1) High-fidelity systems with NETL's award-winning Advanced Process Engineering Co-Simulator (APECS) technology for integrating process simulation with computational fluid dynamics (CFD) and virtual engineering concepts, 2) Dynamic systems with R&D on plant-wide IGCC dynamic simulation, control, and real-time training applications, and 3) Systems optimization including large-scale process optimization, stochastic simulation for risk/uncertainty analysis, and cost estimation. Continued R&D aimed at these and other key process systems engineering models, methods, and tools will accelerate the development of advanced gasification-based FE systems and produce increasingly valuable outcomes for DOE and the Nation.

Zitney, S.E.

2007-09-11

89

Power Systems Development Facility Gasification Test Run TC09  

SciTech Connect

This report discusses Test Campaign TC09 of the Kellogg Brown & Root, Inc. (KBR) Transport Gasifier train with a Siemens Westinghouse Power Corporation (Siemens Westinghouse) particle filter system at the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama. The Transport Gasifier is an advanced circulating fluidized-bed gasifier designed to operate as either a combustor or a gasifier in air- or oxygen-blown mode of operation using a particulate control device (PCD). The Transport Gasifier was operated as a pressurized gasifier during TC09 in air- and oxygen-blown modes. Test Run TC09 was started on September 3, 2002, and completed on September 26, 2002. Both gasifier and PCD operations were stable during the test run, with a stable baseline pressure drop. The oxygen feed supply system worked well and the transition from air to oxygen was smooth. The gasifier temperature varied between 1,725 and 1,825 F at pressures from 125 to 270 psig. The gasifier operates at lower pressure during oxygen-blown mode due to the supply pressure of the oxygen system. In TC09, 414 hours of solid circulation and over 300 hours of coal feed were attained with almost 80 hours of pure oxygen feed.

Southern Company Services

2002-09-30

90

Engineering the ULTra System  

NSDL National Science Digital Library

The Advanced Transport Group at the University of Bristol, upon considering current traffic congestion problems in England and throughout the world, attempted to "identify the ideal system for future urban transport." The group's work has led to the development of the Urban Light Transport (ULTra) System. This paper, published in September 2002, describes the engineering challenges and accomplishments of the endeavor. Thus far, a test track has been constructed, and an initial vehicle design was successfully demonstrated. The ULTra home page provides much more information, documents, and videos.

Lowson, Martin.

2002-01-01

91

GENETIC ALGORITHMS CONTROL SYSTEMS ENGINEERING  

E-print Network

GENETIC ALGORITHMS IN CONTROL SYSTEMS ENGINEERING P. J. FLEMING R. C. PURSHOUSE Department. 789 May 2001 #12;Genetic algorithms in control systems engineering P. J. Fleming and R. C. Purshouse of Automatic Control and Systems Engineering University of Sheffield Sheffield, S1 3JD UK Research Report No

Coello, Carlos A. Coello

92

Power Systems Development Facility Gasification Test Run TC11  

SciTech Connect

This report discusses Test Campaign TC11 of the Kellogg Brown & Root, Inc. (KBR) Transport Gasifier train with a Siemens Westinghouse Power Corporation (Siemens Westinghouse) particle filter system at the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama. The Transport Gasifier is an advanced circulating fluidized-bed gasifier designed to operate as either a combustor or a gasifier in air- or oxygen-blown mode of operation using a particulate control device (PCD). Test run TC11 began on April 7, 2003, with startup of the main air compressor and the lighting of the gasifier start-up burner. The Transport Gasifier operated until April 18, 2003, when a gasifier upset forced the termination of the test run. Over the course of the entire test run, gasifier temperatures varied between 1,650 and 1,800 F at pressures from 160 to 200 psig during air-blown operations and around 135 psig during enriched-air operations. Due to a restriction in the oxygen-fed lower mixing zone (LMZ), the majority of the test run featured air-blown operations.

Southern Company Services

2003-04-30

93

Boiler control systems engineering  

SciTech Connect

The book provides in-depth coverage on how to safely and reliably control the firing of a boiler. Regardless of the capacity or fuel, certain fundamental control systems are required for boiler control. Large utility systems are more complex due to the number of burners and the overall capacity and equipment. This book covers engineering details on control systems and provides specific examples of boiler control including configuration and tuning. References to requirements are based on the 2004 NFPA 85 along with other ISA standards. Detailed chapters cover: Boiler fundamentals including piping and instrument diagrams (P&IDs) and a design basis checklist; Control of boilers, from strategies and bumpless transfer to interlock circuitry and final control elements; Furnace draft; Feedwater; Coal-fired boilers; Fuel and air control; Steam temperature; Burner management systems; Environment; and Control valve sizing. 2 apps.

Gilman, J.

2005-07-01

94

Leveling Intermittent Renewable Energy Production Through Biomass Gasification-Based Hybrid Systems  

SciTech Connect

The increased use of intermittent renewable power in the United States is forcing utilities to manage increasingly complex supply and demand interactions. This paper evaluates biomass pathways for hydrogen production and how they can be integrated with renewable resources to improve the efficiency, reliability, dispatchability, and cost of other renewable technologies. Two hybrid concepts were analyzed that involve co-production of gaseous hydrogen and electric power from thermochemical biorefineries. Both of the concepts analyzed share the basic idea of combining intermittent wind-generated electricity with a biomass gasification plant. The systems were studied in detail for process feasibility and economic performance. The best performing system was estimated to produce hydrogen at a cost of $1.67/kg. The proposed hybrid systems seek to either fill energy shortfalls by supplying hydrogen to a peaking natural gas turbine or to absorb excess renewable power during low-demand hours. Direct leveling of intermittent renewable electricity production is accomplished with either an indirectly heated biomass gasifier, or a directly heated biomass gasifier. The indirect gasification concepts studied were found to be cost competitive in cases where value is placed on controlling carbon emissions. A carbon tax in the range of $26-40 per metric ton of CO{sub 2} equivalent (CO{sub 2}e) emission makes the systems studied cost competitive with steam methane reforming (SMR) to produce hydrogen. However, some additional value must be placed on energy peaking or sinking for these plants to be economically viable. The direct gasification concept studied replaces the air separation unit (ASU) with an electrolyzer bank and is unlikely to be cost competitive in the near future. High electrolyzer costs and wind power requirements make the hybridization difficult to justify economically without downsizing the system. Based on a direct replacement of the ASU with electrolyzers, hydrogen can be produced for $0.27 premium per kilogram. Additionally, if a non-renewable, grid-mix electricity is used, the hybrid system is found to be a net CO{sub 2}e emitter.

Dean, J.; Braun, R.; Penev, M.; Kinchin, C.; Munoz, D.

2010-01-01

95

Sustainable gasificationbiochar systems? A case-study of rice-husk gasification in Cambodia, Part II: Field trial results, carbon abatement,  

E-print Network

Sustainable gasification­biochar systems? A case-study of rice-husk gasification in Cambodia, Part II: Field trial results, carbon abatement, economic assessment and conclusions Simon Shackley a, Metro Manila, Philippines a r t i c l e i n f o Article history: Received 15 June 2011 Accepted 8

Haszeldine, Stuart

96

Surface Gasification Materials Program. Semiannual progress report for the period ending September 30, 1982  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. The Program is divided into two subprograms: (1) the Gasification Systems Fabrication Technology Program and (2) the Materials Application and Development Program. The purpose of the Gasification Systems Fabrication Technology Program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. The purpose of the Materials Application and Development Program is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. The Morgantown Energy Technology Center (METC), in its lead role for gasification projects, is responsible for ensuring that the Surface Gasification Materials Program is responsive to the needs for gasification systems. Under its lead role for fossil energy materials, the Oak Ridge Operations Office (ORO), is responsible for the planning, implementation, and management of the program in accordance with guidance received from METC. The ORNL Fossil Energy Materials Program Office compiles and issues this combined semiannual progress report from camera-ready copies submitted by each of the participating organizations.

Not Available

1982-12-01

97

Gasification Product Improvement Facility (GPIF)  

SciTech Connect

The objective is to provide a test facility to support early commercialization of advanced fixed-bed coal gasification technology electric power generation applications. The proprietary CRS Sirrine Engineers, Inc. PyGas{trademark} staged gasifier has been selected as the initial gasifier to be developed under this program. The gasifier is expected to avoid agglomeration when used on caking coals. It is also being designed to crack tar vapors and ammonia, and to provide an environment in which volatilized alkali may condense onto aluminosilicates in the coal ash thereby minimizing their exiting with the hot raw coal gas and passing through the system to the gas turbine. The management plan calls for a three phased program. The initial phase (Phase 1), includes the CRS Sinine Engineers, Inc. proprietary gasification invention called PyGas{trademark}, necessary coal and limestone receiving/storage/reclaim systems to allow closely metered coal and limestone to be fed into the gasifier for testing. The coal gas is subsequently piped to and combusted in an existing burner of the Monongahela Power Fort Martin Generating Station Unit No. 2. Continuous gasification process steam is generated by a small GPIF packaged boiler using light oil fuel at startup, and by switching from light oil to coal gas after startup. The major peripheral equipment such as foundations, process water system, ash handling, ash storage silo, emergency vent pipe, building, lavatory, electrical interconnect, control room, provisions for Phases II & III, and control system are all included in Phase I. A future hot gas cleanup unit conceptualized to be a zinc ferrite based fluidized bed process constitutes the following phase (Phase H). The final phase (Phase III) contemplates the addition of a combustion turbine and generator set sized to accommodate the parasitic load of the entire system.

Sadowski, R.S.; Brooks, K.S.; Skinner, W.H.; Brown, M.J.

1992-11-01

98

Gasification Product Improvement Facility (GPIF)  

SciTech Connect

The objective is to provide a test facility to support early commercialization of advanced fixed-bed coal gasification technology electric power generation applications. The proprietary CRS Sirrine Engineers, Inc. PyGas[trademark] staged gasifier has been selected as the initial gasifier to be developed under this program. The gasifier is expected to avoid agglomeration when used on caking coals. It is also being designed to crack tar vapors and ammonia, and to provide an environment in which volatilized alkali may condense onto aluminosilicates in the coal ash thereby minimizing their exiting with the hot raw coal gas and passing through the system to the gas turbine. The management plan calls for a three phased program. The initial phase (Phase 1), includes the CRS Sinine Engineers, Inc. proprietary gasification invention called PyGas[trademark], necessary coal and limestone receiving/storage/reclaim systems to allow closely metered coal and limestone to be fed into the gasifier for testing. The coal gas is subsequently piped to and combusted in an existing burner of the Monongahela Power Fort Martin Generating Station Unit No. 2. Continuous gasification process steam is generated by a small GPIF packaged boiler using light oil fuel at startup, and by switching from light oil to coal gas after startup. The major peripheral equipment such as foundations, process water system, ash handling, ash storage silo, emergency vent pipe, building, lavatory, electrical interconnect, control room, provisions for Phases II III, and control system are all included in Phase I. A future hot gas cleanup unit conceptualized to be a zinc ferrite based fluidized bed process constitutes the following phase (Phase H). The final phase (Phase III) contemplates the addition of a combustion turbine and generator set sized to accommodate the parasitic load of the entire system.

Sadowski, R.S.; Brooks, K.S.; Skinner, W.H.; Brown, M.J.

1992-01-01

99

Biodiesel and electrical power production through vegetable oil extraction and byproducts gasification: Modeling of the system.  

PubMed

Aim of this work is to introduce an alternative to the standard biodiesel production chain, presenting an innovative in situ system. It is based on the chemical conversion of vegetable oil from oleaginous crops in synergy with the gasification of the protein cake disposed by the seed press. The syngas from the gasifier is here used to produce electrical power while part of it is converted into methanol. The methanol is finally used to transform the vegetable oil into biodiesel. Through a coupled use of ASPEN PLUS(TM) and MATLAB(TM) codes, a rapeseed, soy and sunflower rotation, with a duration of three year, was simulated considering 15ha of soil. This surface resulted sufficient to feed a 7kWel power plant. Simulation outputs proven the system to be self-sustainable. In addition, economical NPV of the investment is presented. Finally the environmental, economical and social advantages related to this approach are discussed. PMID:25151071

Allesina, Giulio; Pedrazzi, Simone; Tebianian, Sina; Tartarini, Paolo

2014-10-01

100

Engine exhaust gas recirculation system  

Microsoft Academic Search

An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air control valve therein furnishes atmospheric air to the intake passage downstream from the throttle valve. Vacuum responsive actuators are provided for

H. Nishimura; T. Shioya; T. Umemoto

1981-01-01

101

Engine exhaust gas recirculation system  

Microsoft Academic Search

An exhaust gas recirculation system for an internal combustion engine employs a recirculation control valve in a passageway connecting the engine exhaust passage to the engine intake passage downstream from the throttle valve. An air conduit having an air control valve therein draws atmospheric air into the intake passage downstream from the throttle valve. Vacuum responsive actuators are provided for

K. Ishii; H. Nishimura; K. Osawa

1981-01-01

102

Diffusion Coatings for Corrosion-Resistant Components in Coal Gasification Systems  

SciTech Connect

Heat-exchangers, particle filters, turbines, and other components in integrated coal gasification combined cycle system must withstand the highly sulfiding conditions of the high temperature coal gas over an extended period of time. The performance of components degrades significantly with time unless expensive high alloy materials are used. Deposition of a suitable coating on a low-cost alloy may improve its resistance to such sulfidation attack, and decrease capital and operating costs. The alloys used in the gasifier service include austenitic and ferritic stainless steels, nickel-chromium-iron alloys, and expensive nickel-cobalt alloys. The primary activity this period was preparation and presentation of the findings on this project at the Twenty-Third annual Pittsburgh Coal Conference. Dr. Malhotra attended this conference and presented a paper. A copy of his presentation constitutes this quarterly report.

Gopala N. Krishnan; Ripudaman Malhotra; Esperanza Alvarez; Kai-Hung Lau; Jordi Perez Mariano; Angel Sanjurjo

2006-09-30

103

Stirling engine heating system  

SciTech Connect

A hot gas engine is described wherein a working gas flows back and forth in a closed path between a relatively cooler compression cylinder side of the engine and a relatively hotter expansion cylinder side of the engine and the path contains means including a heat source and a heat sink acting upon the gas in cooperation with the compression and expansion cylinders to cause the gas to execute a thermodynamic cycle wherein useful mechanical output power is developed by the engine, the improvement in the heat source which comprises a plurality of individual tubes each forming a portion of the closed path for the working gas.

Johansson, L.N.; Houtman, W.H.; Percival, W.H.

1988-06-28

104

NASA systems engineering handbook. Draft  

NASA Technical Reports Server (NTRS)

This handbook is intended to provide information on systems engineering that will be useful to NASA system engineers, especially new ones. Its primary objective is to provide a generic description of systems engineering as it should be applied throughout NASA. Field Center Handbooks are encouraged to provide center-specific details of implementation. For NASA system engineers to choose to keep a copy of this handbook at their elbows, it must provide answers that cannot be easily found elsewhere. Consequently, it provides NASA-relevant perspectives and NASA-particular data. NASA management instructions (NMI's) are referenced when applicable. This handbook's secondary objective is to serve as a useful companion to all of the various courses in systems engineering that are being offered under NASA's auspices. The coverage of systems engineering is general to techniques, concepts, and generic descriptions of processes, tools, and techniques. It provides good systems engineering practices, and pitfalls to avoid. This handbook describes systems engineering as it should be applied to the development of major NASA product and producing systems.

Shishko, Robert; Chamberlain, Robert G.; Aster, Robert; Bilardo, Vincent; Forsberg, Kevin; Hammond, Walter E.; Mooz, Harold; Polaski, Lou; Wade, Ron; Cassingham, Randy (editor)

1992-01-01

105

Task 4, Mild gasification technology development system integration studies, April 1989--September 1990  

SciTech Connect

The IGT mild gasification process incorporates an integrated fluidized-bed/entrained-bed reactor with heat supplied by a combination of hot char and gas recycle. The use of mild operating conditions (1000 to 1500{degree}F), low pressures (<50 psig), and continuous operation in closed reactors, combined with the potential value-added benefits from the sale of co-products, offer an economical and environmentally sound approach to advanced coal utilization. The tests conducted as Task 4 operated with a full-stream product gas condensate system that was added to the process research unit (PRU). In these tests, the use of recycled char from previous tests mixed with the caking coal feed to the fluidized bed simulated the scale-up process design for the adiabatic process development unit (PDU) using recycled hot char. Also, one test was performed to evaluate the effect of carbon dioxide in the inlet fluidization gas, as would be present in the PDU design using heated recycled product gas for fluidization. Co-product yields and quality were compared with Task 2 data and related to sequential char recycle, fluidization gas, and coal type. Oils/tars yields with Illinois and West Virginia bituminous coals were consistently over 25% by weight of moisture- and ash-free coal, and were not adversely affected either by replacement of coke diluent with mild gasification char or by the use of 19% CO{sub 2} in the fluidization gas. Condensable co-products from the Task 4 PRU tests were evaluated by Reilly Industries for the production of chemicals and pitch binders, and recommendations for liquids upgrading for incorporation into the 24-ton/h PDU design were made. Larger batches of char were generated for preparation of form coke and smokeless fuel briquettes to be tested. 3 refs., 4 figs., 31 tabs.

Knight, R.A.; Gissy, J.; Onischak, M.; Carty, R.; Babu, S.P.; Wootten, J.M.; Duthie, R.G.

1990-12-01

106

System safety engineering analysis handbook  

NASA Technical Reports Server (NTRS)

The basic requirements and guidelines for the preparation of System Safety Engineering Analysis are presented. The philosophy of System Safety and the various analytic methods available to the engineering profession are discussed. A text-book description of each of the methods is included.

Ijams, T. E.

1972-01-01

107

Plasma gasification of organic containing substances as a promising way of development of alternative renewable power engineering  

NASA Astrophysics Data System (ADS)

The paper deals with perspectives of large-scale implementation of the plasma gasification process of solid organic-containing substances as a source of renewable energy. First of all, such substances as wood waste, agriculture waste, solid household waste are considered. Thanks to the process of the plasma high-temperature gasification the energy of their combustion can be completely converted into the energy of the synthesis gas combustion, which use as a fuel for the combined cycle allows electricity generation with efficiency of ~60 %. Thus, if the psychogenesis production wastes are considered, this technology enables avoiding additional emission of carbon dioxide into biosphere as for production of biomass from biosphere it is extracted the same amount of carbon dioxide as is emitted at its combustion. The report represents the realized and developing designs of plasma gasification, their advantages and deficiencies.

Rutberg, Ph G.; Bratsev, A. N.; Kuznetsov, V. A.; Kumkova, I. I.; Popov, V. E.; Surov, A. V.

2012-12-01

108

industrial & systems (ISE) Industrial and Systems Engineers use engineering and business principles  

E-print Network

70 industrial & systems (ISE) Industrial and Systems Engineers use engineering and business systems to help companies compete in today's global marketplace. The Industrial and Systems Engineer. Programs Available · Industrial and Systems Engineering Bachelor of Science 129 units · Industrial

Rohs, Remo

109

Instrumentation and Evaluation of a Pilot Scale Fluidized Bed Biomass Gasification System  

E-print Network

A pilot scale fluidized bed biomass gasifier developed at Texas A&M University in College Station, Texas was instrumented with thermocouples, pressure transducers and motor controllers for monitoring gasification temperature and pressure, air flow...

Maglinao, Amado L

2009-12-04

110

Boiling liquid engine cooling system  

Microsoft Academic Search

A boiling liquid cooling system is described for an engine, comprising: means defining in the engine a coolant jacket into which coolant is introduced in liquid state and from which coolant is discharged in gaseous state; a radiator into which gaseous coolant from the coolant jacket is introduced to be liquified; an electric pump for pumping the coolant thus liquified

N. Miura; Y. Hayashi

1987-01-01

111

Intelligent Engine Systems  

NASA Technical Reports Server (NTRS)

A high bypass jet engine fan case represents one of the largest, heaviest single components in an engine. In addition to supporting the inlet and providing the fan flowpath, the most critical function is the containment of a failed fan blade. In this development program, a lightweight, low-cost composite containment case with diagnostic capabilities was developed, fabricated, and tested. The fan case design, containment methods, and diagnostic concepts evaluated in the initial Propulsion 21 program were improved and scaled up to a full case design.

Xie, Ming

2008-01-01

112

Novel hydrogen separation device development for coal gasification system applications. Final report  

SciTech Connect

This study was undertaken for the development of a novel Electrochemical Hydrogen Separator (EHS) technology for low-cost hydrogen separation from coal derived gases. Design and operating parameter testing was performed using subscale cells (25 cm{sup 2}). High H{sub 2} purity, >99% is one of the main features of the EHS. It was found that N{sub 2}, CO{sub 2} and CH{sub 4} behave as equivalent inerts; EHS performance is not affected by the balance of feed gas containing these components. This product purity level is not sacrificed by increased H{sub 2} recovery. CO, however, does adversely affect EHS performance and therefore feed stream pretreatment is recommended. Low levels of H{sub 2}S and NH{sub 3} were added to the feed gas stream and it was verified that these impurities did not affect EHS performance. Task 2 demonstrated the scale-up to full size multi-cell module operation while maintaining a stable energy requirement. A 10-cell full-size module (1050 cm{sup 2} cell active area) was operated for over 3,800 hours and gave a stable baseline performance. Several applications for the EHS were investigated. The most economically attractive systems incorporating an EHS contain low pressure, dilute hydrogen streams, such as coal gasification carbonate fuel cell systems, hydrogen plant purification and fluid catalytic cracker units. In addition, secondary hydrogen recovery from PSA or membrane tailstreams using an EHS may increase overall system efficiency.

Not Available

1993-08-01

113

Engine Data Interpretation System (EDIS)  

NASA Technical Reports Server (NTRS)

A prototype of an expert system was developed which applies qualitative or model-based reasoning to the task of post-test analysis and diagnosis of data resulting from a rocket engine firing. A combined component-based and process theory approach is adopted as the basis for system modeling. Such an approach provides a framework for explaining both normal and deviant system behavior in terms of individual component functionality. The diagnosis function is applied to digitized sensor time-histories generated during engine firings. The generic system is applicable to any liquid rocket engine but was adapted specifically in this work to the Space Shuttle Main Engine (SSME). The system is applied to idealized data resulting from turbomachinery malfunction in the SSME.

Cost, Thomas L.; Hofmann, Martin O.

1990-01-01

114

Assessment of coal gasification/hot gas cleanup based advanced gas turbine systems  

SciTech Connect

The major objectives of the joint SCS/DOE study of air-blown gasification power plants with hot gas cleanup are to: (1) Evaluate various power plant configurations to determine if an air-blown gasification-based power plant with hot gas cleanup can compete against pulverized coal with flue gas desulfurization for baseload expansion at Georgia Power Company's Plant Wansley; (2) determine if air-blown gasification with hot gas cleanup is more cost effective than oxygen-blown IGCC with cold gas cleanup; (3) perform Second-Law/Thermoeconomic Analysis of air-blown IGCC with hot gas cleanup and oxygen-blown IGCC with cold gas cleanup; (4) compare cost, performance, and reliability of IGCC based on industrial gas turbines and ISTIG power island configurations based on aeroderivative gas turbines; (5) compare cost, performance, and reliability of large (400 MW) and small (100 to 200 MW) gasification power plants; and (6) compare cost, performance, and reliability of air-blown gasification power plants using fluidized-bed gasifiers to air-blown IGCC using transport gasification and pressurized combustion.

Not Available

1990-12-01

115

industrial & systems (ISE) Industrial and Systems engineers use engineering and business principles  

E-print Network

74 industrial & systems (ISE) Industrial and Systems engineers use engineering and business to help companies compete in today's global marketplace. The Industrial and Systems engineer's task. Programs Available · Industrial and Systems Engineering Bachelor of Science 128 units · Industrial

Rohs, Remo

116

Energy Systems Engineering Technician Curriculum  

NSDL National Science Digital Library

St. Lawerence College of Ontario, Canada offers a two year program for students interested in becoming Energy Systems Engineering Technicians serving the alternative energy industry. The website offers a description of the program and links to required courses.

2010-06-07

117

Assessment of a coal-gasification fuel-cell system for utility application  

NASA Astrophysics Data System (ADS)

The technical and economic feasibility of a coal gasification-advanced phosphoric acid fuel cell power plant for electric utility application were defined and assessed. The system design criteria selected reslted in a modular, relatively small sized poer plant that could be configured with a basic building block of approximately 11 MW. A range of coals and lignite was evaluated as the basic feedstock for a low-Btu fixed-bed conventional air-blown coal gasifier. The system included gas processing, cleanup, compression and delivery of sulfur-free hydrogen-rich gas to an advanced phosphoric acid fuel cell. Equipment erection and operating costs, in 1981 dollars, were solicited from American industry for all process sections. The plant was designed and evaluated on the basis of low capital cost, lowest overall heat rate and, as far as possible, with off-the-shelf technology. A 44 MW lignite example plant utilizing the basic building block concept was defined and evaluated for Lincoln, Nebraska, as an example site.

Cronin, P. G.; Murphy, A. J.; Newton, R. J.; Wagner, E. S.

1982-05-01

118

Waste to Energy Conversion by Stepwise Liquefaction, Gasification and "Clean" Combustion of Pelletized Waste Polyethylene for Electric Power Generation---in a Miniature Steam Engine  

NASA Astrophysics Data System (ADS)

The amounts of waste plastics discarded in developed countries are increasing drastically, and most are not recycled. The small fractions of the post-consumer plastics which are recycled find few new uses as their quality is degraded; they cannot be reused in their original applications. However, the high energy density of plastics, similar to that of premium fuels, combined with the dwindling reserves of fossil fuels make a compelling argument for releasing their internal energy through combustion, converting it to thermal energy and, eventually, to electricity through a heat engine. To minimize the emission of pollutants this energy conversion is done in two steps, first the solid waste plastics undergo pyrolytic gasification and, subsequently, the pyrolyzates (a mixture of hydrocarbons and hydrogen) are blended with air and are burned "cleanly" in a miniature power plant. This plant consists of a steam boiler, a steam engine and an electricity generator.

Talebi Anaraki, Saber

119

Optical systems engineering - A tutorial  

NASA Technical Reports Server (NTRS)

The paper examines the use of the systems engineering approach in the design of optical systems, noting that the use of such an approach which involves an integrated interdisciplinary approach to the development of systems is most appropriate for optics. It is shown that the high precision character of optics leads to complex and subtle effects on optical system performance, resulting from structural, thermal dynamical, control system, and manufacturing and assembly considerations. Attention is given to communication problems that often occur among users and optical engineers due to the unique factors of optical systems. It is concluded that it is essential that the optics community provide leadership to resolve communication problems and fully formalize the field of optical systems engineering.

Wyman, C. L.

1979-01-01

120

Surface-gasification materials program. Semiannual progress report for the period ending March 31, 1982  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. The Program is divided into two subprograms: (1) the Gasification Systems Fabrication Technology Program and (2) the Materials Application and Development Program. The purpose of the Gasification Systems Fabrication Technology Program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. The purpose of the Materials Application and Development Program is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. The management of materials projects in support of surface gasification sponsored by the Headquarters DOE Gasification Division has been defined in an April 16, 1982 METC-sponsored agreement transmitted to DOE field offices and performing contractors. This agreement recognizes the lead role in fossil energy materials delegated by METC to the DOE Oak Ridge Operations Office and the Oak Ridge National Laboratory. The ORNL Fossil Energy Materials Program Office compiles and issues this combined semiannual progress report from camera-ready copies submitted by each of the participating organizations. Distribution is as shown on pages 59 to 63. Future reports will be issued on a semiannual basis to a similar distribution.

Not Available

1982-08-01

121

MIT Engineering Systems Symposium, March 2004 1 The Case for Evolving Systems Engineering as a  

E-print Network

MIT Engineering Systems Symposium, March 2004 1 The Case for Evolving Systems Engineering as a Field within Engineering Systems Donna Rhodes and Daniel Hastings Engineering Systems Division. Engineering Systems is an important new field of study focusing on the complex engineering of systems

de Weck, Olivier L.

122

Transportation Systems Engineering GRADUATE STUDIES  

E-print Network

Transportation Systems Engineering GRADUATE STUDIES TRANSPORTATION SYSTEMS are the building blocks and provides for an improved quality of life. However, transportation systems by their very nature also affect the environment through physical construction and operation of transportation facilities, and through the travel

Wang, Yuhang

123

Engineering Resilient Cyber-Physical Systems  

E-print Network

Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;Thrust Area 6 Professor of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Email: Overbye@illinois.edu Power Systems Engineering Research Center The Power Systems Engineering Research Center (PSERC

124

Communication Engineering Systems Introduction to Communication Systems  

E-print Network

Communication Engineering Systems Introduction to Communication Systems (1) Assoc .. 4 #12;Outline Variety of Today's Communication SystemsVariety of Today s Communication Systems Design Challenges Basic of Communication Systems F d t l Li it tiFundamental Limitation Bandwidth

Kovintavewat, Piya

125

System Engineering Paper  

NASA Technical Reports Server (NTRS)

The Iowa State University team, Team LunaCY, is composed of the following sub-teams: the main student organization, the Lunabotics Club; a senior mechanical engineering design course, ME 415; a senior multidisciplinary design course, ENGR 466; and a senior design course from Wartburg College in Waverly, Iowa. Team LunaCY designed and fabricated ART-E III, Astra Robotic Tractor- Excavator the Third, for the team's third appearance in the NASA Lunabotic Mining competition. While designing ART-E III, the team had four main goals for this year's competition:to reduce the total weight of the robot, to increase the amount of regolith simulant mined, to reduce dust, and to make ART-E III autonomous. After many designs and research, a final robot design was chosen that obtained all four goals of Team LunaCY. A few changes Team LunaCY made this year was to go to the electrical, computer, and software engineering club fest at Iowa State University to recruit engineering students to accomplish the task of making ART-E III autonomous. Team LunaCY chose to use LabView to program the robot and various sensors were installed to measure the distance between the robot and the surroundings to allow ART-E III to maneuver autonomously. Team LunaCY also built a testing arena to test prototypes and ART-E III in. To best replicate the competition arena at the Kennedy Space Center, a regolith simulant was made from sand, QuickCrete, and fly ash to cover the floor of the arena. Team LunaCY also installed fans to allow ventilation in the arena and used proper safety attire when working in the arena . With the additional practice in the testing arena and innovative robot design, Team LunaCY expects to make a strong appearance at the 2012 NASA Lunabotic Mining Competition. .

Heise, James; Hull, Bethanne J.; Bauer, Jonathan; Beougher, Nathan G.; Boe, Caleb; Canahui, Ricardo; Charles, John P.; Cooper, Zachary Davis Job; DeShaw, Mark A.; Fontanella, Luan Gasparetto; Friel, Mark; Goebel, Katie; Grant, Alex Martinsdacosta; Graves, Matt; Harms, Ryan Andrew; Hill, Aren; Lsely, Kevin Lee; Jose, Sonia; Klein, Andrew; Kolstad, Lauren Wickham; Lamp, Daniel A.; Lindquist, Mariangela Martin; Lopes, Daniel da Paula; Lourens, Rob; Matthews, Christopher

2012-01-01

126

Life cycle assessment of a biomass gasification combined-cycle power system  

SciTech Connect

The potential environmental benefits from biomass power are numerous. However, biomass power may also have some negative effects on the environment. Although the environmental benefits and drawbacks of biomass power have been debated for some time, the total significance has not been assessed. This study serves to answer some of the questions most often raised in regard to biomass power: What are the net CO{sub 2} emissions? What is the energy balance of the integrated system? Which substances are emitted at the highest rates? What parts of the system are responsible for these emissions? To provide answers to these questions, a life cycle assessment (LCA) of a hypothetical biomass power plant located in the Midwest United States was performed. LCA is an analytical tool for quantifying the emissions, resource consumption, and energy use, collectively known as environmental stressors, that are associated with converting a raw material to a final product. Performed in conjunction with a technoeconomic feasibility study, the total economic and environmental benefits and drawbacks of a process can be quantified. This study complements a technoeconomic analysis of the same process, reported in Craig and Mann (1996) and updated here. The process studied is based on the concept of power Generation in a biomass integrated gasification combined cycle (BIGCC) plant. Broadly speaking, the overall system consists of biomass production, its transportation to the power plant, electricity generation, and any upstream processes required for system operation. The biomass is assumed to be supplied to the plant as wood chips from a biomass plantation, which would produce energy crops in a manner similar to the way food and fiber crops are produced today. Transportation of the biomass and other materials is by both rail and truck. The IGCC plant is sized at 113 MW, and integrates an indirectly-heated gasifier with an industrial gas turbine and steam cycle. 63 refs., 34 figs., 32 tabs.

Mann, M.K.; Spath, P.L.

1997-12-01

127

Biomass gasification integrated with pyrolysis in a circulating fluidised bed  

Microsoft Academic Search

The use of biomass for energy generation is getting increasing attention. At present, gasification of biomass is taken as a popular technical route to produce fuel gas for application in boilers, engine, gas turbine or fuel cell. Up to now, most of researchers have focused their attentions only on fixed-bed gasification and fluidised bed gasification under air-blown conditions. In that

G Chen; J Andries; H Spliethoff; M Fang; P. J van de Enden

2004-01-01

128

Surface Gasification Materials Program. Semiannual Progress Report for the Period Ending September 30, 1982.  

National Technical Information Service (NTIS)

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. The Program is divided into two subprograms: (1) the Gasification Systems F...

1982-01-01

129

Hybrid solar coal gasification  

Microsoft Academic Search

The University of New Hampshire is engaged in the research and development of a Gas Recirculation Two Stage Fluidized-Bed Hybrid Coal Gasification System where the heat required for the endothermic reactions of coal, lignite, or biomass with steam for the production of synthesis gas (CO + Hâ) is supplied by solar energy. This paper describes the experimental set-up and discusses

V. K. Mathur; S. Canguly; S. Chaudhary

1983-01-01

130

Earth Systems Science and Engineering  

Microsoft Academic Search

Providing the essential energy and water systems to support human needs while understanding and addressing their environmental consequences is a watershed problem for the 21st century. The LLNL Earth System Science and Engineering Program seeks to provide the scientific understanding and technological expertise to help provide solutions at both global and regional scales. Our work is highly collaborative with universities,

Rotman

2006-01-01

131

Energy Engineering and Systems Analysis  

E-print Network

Energy Engineering and Systems Analysis Fission Process and Control In nuclear power reactors, called fission products, with significant heat generation. A nuclear reactor system is controlled the need arise, such as in an emergency or planned power shutoff, the control rods are inserted

Kemner, Ken

132

Intelligent Engine Systems: Acoustics  

NASA Technical Reports Server (NTRS)

An extensive study of new fan exhaust nozzle technologies was performed. Three new uniform chevron nozzles were designed, based on extensive CFD analysis. Two new azimuthally varying variants were defined. All five were tested, along with two existing nozzles, on a representative model-scale, medium BPR exhaust nozzle. Substantial acoustic benefits were obtained from the uniform chevron nozzle designs, the best benefit being provided by an existing design. However, one of the azimuthally varying nozzle designs exhibited even better performance than any of the uniform chevron nozzles. In addition to the fan chevron nozzles, a new technology was demonstrated, using devices that enhance mixing when applied to an exhaust nozzle. The acoustic benefits from these devices applied to medium BPR nozzles were similar, and in some cases superior to, those obtained from conventional uniform chevron nozzles. However, none of the low noise technologies provided equivalent acoustic benefits on a model-scale high BPR exhaust nozzle, similar to current large commercial applications. New technologies must be identified to improve the acoustics of state-of-the-art high BPR jet engines.

Wojno, John; Martens, Steve; Simpson, Benjamin

2008-01-01

133

Computer systems and software engineering  

NASA Technical Reports Server (NTRS)

The High Technologies Laboratory (HTL) was established in the fall of 1982 at the University of Houston Clear Lake. Research conducted at the High Tech Lab is focused upon computer systems and software engineering. There is a strong emphasis on the interrelationship of these areas of technology and the United States' space program. In Jan. of 1987, NASA Headquarters announced the formation of its first research center dedicated to software engineering. Operated by the High Tech Lab, the Software Engineering Research Center (SERC) was formed at the University of Houston Clear Lake. The High Tech Lab/Software Engineering Research Center promotes cooperative research among government, industry, and academia to advance the edge-of-knowledge and the state-of-the-practice in key topics of computer systems and software engineering which are critical to NASA. The center also recommends appropriate actions, guidelines, standards, and policies to NASA in matters pertinent to the center's research. Results of the research conducted at the High Tech Lab/Software Engineering Research Center have given direction to many decisions made by NASA concerning the Space Station Program.

Mckay, Charles W.

1988-01-01

134

Systems engineering at the nanoscale  

NASA Astrophysics Data System (ADS)

Nanomaterials have provided some of the greatest leaps in technology over the past twenty years, but their relatively early stage of maturity presents challenges for their incorporation into engineered systems. Perhaps even more challenging is the fact that the underlying physics at the nanoscale often run counter to our physical intuition. The current state of nanotechnology today includes nanoscale materials and devices developed to function as components of systems, as well as theoretical visions for "nanosystems," which are systems in which all components are based on nanotechnology. Although examples will be given to show that nanomaterials have indeed matured into applications in medical, space, and military systems, no complete nanosystem has yet been realized. This discussion will therefore focus on systems in which nanotechnology plays a central role. Using self-assembled magnetic artificial cilia as an example, we will discuss how systems engineering concepts apply to nanotechnology.

Benkoski, Jason J.; Breidenich, Jennifer L.; Wei, Michael C.; Clatterbaughi, Guy V.; Keng, Pei Yuin; Pyun, Jeffrey

2012-06-01

135

The Mansfield Two-Stage, Low BTU Gasification System: Report of Operations  

E-print Network

The least expensive way to produce gas from coal is by low Btu gasification, a process by which coal is converted to carbon monoxide and hydrogen by reacting it with air and steam. Low Btu gas, which is used near its point of production, eliminates...

Blackwell, L. T.; Crowder, J. T.

1983-01-01

136

Assessment of integration of different biomass gasification alternatives in a district-heating system  

Microsoft Academic Search

With increasingly stringent CO2 emission reduction targets, incentives for efficient use of limited biomass resources increase. Technologies for gasification of biomass may then play a key role given their potential for high electrical efficiency and multiple outputs; not only electricity but also bio transport fuels and district heat. The aim of this study is to assess the economic consequences and

E. Fahlén; E. O. Ahlgren

2009-01-01

137

INDUSTRIAL&SYSTEMS Industrial and Systems engineers use  

E-print Network

78 INDUSTRIAL&SYSTEMS Industrial and Systems engineers use engineering and business principles companies compete in today's global marketplace. The Industrial and Systems engineer's task is to take · Industrial and Systems Engineering Bachelor of Science 128 units · Industrial and Systems Engineering

Rohs, Remo

138

Biometric System Security Systems and Computer Engineering  

E-print Network

on their behavioral and biolog- ical characteristics", a vulnerability in biometric security results in incorrectBiometric System Security Andy Adler Systems and Computer Engineering Carleton University, Ottawa to confidentiality and integrity". Defining biometrics system security is difficult, because of the ways biometric

Adler, Andy

139

2.0 AEDL Systems Engineering  

NASA Technical Reports Server (NTRS)

Some engineering topics: Some Initial Thoughts. Capability Description. Capability State-of-the-Art. Capability Requirements. Systems Engineering. Capability Roadmap. Capability Maturity. Candidate Technologies. Metrics.

Graves, Claude

2005-01-01

140

Diesel engine catalytic combustor system. [aircraft engines  

NASA Technical Reports Server (NTRS)

A low compression turbocharged diesel engine is provided in which the turbocharger can be operated independently of the engine to power auxiliary equipment. Fuel and air are burned in a catalytic combustor to drive the turbine wheel of turbine section which is initially caused to rotate by starter motor. By opening a flapper value, compressed air from the blower section is directed to catalytic combustor when it is heated and expanded, serving to drive the turbine wheel and also to heat the catalytic element. To start, engine valve is closed, combustion is terminated in catalytic combustor, and the valve is then opened to utilize air from the blower for the air driven motor. When the engine starts, the constituents in its exhaust gas react in the catalytic element and the heat generated provides additional energy for the turbine section.

Ream, L. W. (inventor)

1984-01-01

141

Security systems engineering overview  

Microsoft Academic Search

Crime prevention is on the minds of most people today. The concern for public safety and the theft of valuable assets are being discussed at all levels of government and throughout the public sector. There is a growing demand for security systems that can adequately safeguard people and valuable assets against the sophistication of those criminals or adversaries who pose

Steele

1996-01-01

142

Security systems engineering overview  

Microsoft Academic Search

Crime prevention is on the minds of most people today. The concern for public safety and the theft of valuable assets are being discussed at all levels of government and throughout the public sector. There is a growing demand for security systems that can adequately safeguard people and valuable assets against the sophistication of those criminals or adversaries who pose

Basil J. Steele

1997-01-01

143

Diesel engine fuel systems  

SciTech Connect

The film shows the basic structure of diesel systems, including the parts and operation of injectors and fuel pumps. It discusses Bosch, General Motors, and Excello Equipment. This title has been declared obsolete for use within the sponsoring agency, but may have content value for educational use.

Not Available

1994-01-01

144

Diesel engine fuel systems  

SciTech Connect

The film shows the basic structure of diesel systems, including the parts and operation of injectors and fuel pumps. It discusses Bosch, General Motors, and Excello Equipment. This title has been declared obsolete for use within the sponsoring agency, but may have content value for educational use.

NONE

1994-12-31

145

"SYSTEMS ENGINEERING APPLICATIONS  

E-print Network

for Future Submarines (CLASSIFIED) ['98] 19. Low Maintenance Surface Ships ['98] 20. "Carrier Islands" ['99/NAVSEA-Carderock 011 5 AUTOMATED UNDERWATER HULL MAINTENANCE AND MONITORING SYSTEM #12;12/10/2009 D. W. Byers Final: Develop and Assess Integrated Aircraft Carrier Island Concepts and Corresponding Implementation

146

Core Concepts of Systems Engineering  

NSDL National Science Digital Library

This telecollaborative project is designed to provide students in grades 9-12 with an orientation to systems engineering concepts. Through guided activities students will reverse-engineer a common device that contains both electrical and mechanical components and then create a systems diagram for the deconstructed device. (In this case, the device is a disposable camera.) In partnership with other project participants across the country, learners will reassemble the device and test their reconstruction against quality controls. The project is free with teacher registration. The module includes lesson plans, comprehensive teacher tutorial, reference material, question sets and worksheets, and digital collaboration tools. This resource was developed by the Center for Innovation in Science and Engineering Education (CIESE). Participation is cost-free with teacher registration. Editor's Note: Several components of this activity specifically address a physics curriculum. Disposable flash cameras provide an opportunity for analysis of electric field, charging a capacitor, and energy storage on a capacitor.

147

Security systems engineering overview  

NASA Astrophysics Data System (ADS)

Crime prevention is on the minds of most people today. The concern for public safety and the theft of valuable assets are being discussed at all levels of government and throughout the public sector. There is a growing demand for security systems that can adequately safeguard people and valuable assets against the sophistication of those criminals or adversaries who pose a threat. The crime in this country has been estimated at 70 billion dollars in direct costs and up to 300 billion dollars in indirect costs. Health insurance fraud alone is estimated to cost American businesses 100 billion dollars. Theft, warranty fraud, and counterfeiting of computer hardware totaled 3 billion dollars in 1994. A threat analysis is a prerequisite to any security system design to assess the vulnerabilities with respect to the anticipated threat. Having established a comprehensive definition of the threat, crime prevention, detection, and threat assessment technologies can be used to address these criminal activities. This talk will outline the process used to design a security system regardless of the level of security. This methodology has been applied to many applications including: government high security facilities; residential and commercial intrusion detection and assessment; anti-counterfeiting/fraud detection technologies; industrial espionage detection and prevention; security barrier technology.

Steele, Basil J.

1997-01-01

148

System Verification II Systems Engineering  

E-print Network

in safety critical systems to prevent unsafe values, e.g. high doses of radiation. Remember: not just should be able to: Explain the role & practice of debugging in the software process. Describe in detail the purpose, scope of, and activities comprising each of the three main phases of software testing. Conduct

Bryson, Joanna J.

149

Voraussetzungen: Control Systems I & II, System Modeling, Engine Class (IC Engines and Propulsion Systems,  

E-print Network

Systems, Introduction to Modeling and Control of Internal Combustion Engine Systems,...), MATLAB Design for a Novel Engine Concept Position Control for an Internal Combustion Engine (Simulation) German. The control task is to make an internal combustion engine piston follow a reference position trajectory

Lygeros, John

150

Engineering intelligent tutoring systems  

NASA Technical Reports Server (NTRS)

We have defined an object-oriented software architecture for Intelligent Tutoring Systems (ITS's) to facilitate the rapid development, testing, and fielding of ITS's. This software architecture partitions the functionality of the ITS into a collection of software components with well-defined interfaces and execution concept. The architecture was designed to isolate advanced technology components, partition domain dependencies, take advantage of the increased availability of commercial software packages, and reduce the risks involved in acquiring ITS's. A key component of the architecture, the Executive, is a publish and subscribe message handling component that coordinates all communication between ITS components.

Warren, Kimberly C.; Goodman, Bradley A.

1993-01-01

151

Dynamic modeling of gas turbines in integrated gasification fuel cell systems  

NASA Astrophysics Data System (ADS)

Solid oxide fuel cell-gas turbine (SOFC-GT) hybrid systems for use in integrated gasification fuel cell (IGFC) systems operating on coal will stretch existing fossil fuel reserves, generate power with less environmental impact, while having a cost of electricity advantage over most competing technologies. However, the dynamic performance of a SOFC-GT in IGFC applications has not been previously studied in detail. Of particular importance is how the turbo-machinery will be designed, controlled and operated in such applications; this is the focus of the current work. Perturbation and dynamic response analyses using numerical SimulinkRTM models indicate that compressor surge is the predominant concern for safe dynamic turbo-machinery operation while shaft over-speed and excessive turbine inlet temperatures are secondary concerns. Fuel cell temperature gradients and anode-cathode differential pressures were found to be the greatest concerns for safe dynamic fuel cell operation. Two control strategies were compared, that of constant gas turbine shaft speed and constant fuel cell temperature, utilizing a variable speed gas turbine. Neither control strategy could eliminate all vulnerabilities during dynamic operation. Constant fuel cell temperature control ensures safe fuel cell operation, while constant speed control does not. However, compressor surge is more likely with constant fuel cell temperature control than with constant speed control. Design strategies that provide greater surge margin while utilizing constant fuel cell temperature control include increasing turbine design mass flow and decreasing turbine design inlet pressure, increasing compressor design pressure ratio and decreasing compressor design mass flow, decreasing plenum volume, decreasing shaft moment of inertia, decreasing fuel cell pressure drop, maintaining constant compressor inlet air temperature. However, these strategies in some cases incur an efficiency penalty. A broad comparison of cycles employing cathode recycle using either an ejector or a blower indicate that the cycles with the blower provide better turbo-machinery stability and higher system efficiencies than the cycles with the ejector. A comparison of two models controlled to maintain constant fuel cell operating temperatures of 1,100 K and 1,373 K, show similar dynamic performance trends, indicating that the results are applicable to planar and tubular SOFC-GT systems and should apply to other operating temperatures.

Maclay, James Davenport

152

Cooling system for automotive engine  

Microsoft Academic Search

An internal combustion engine: a structure subject to heat flux; and a cooling system is described which consists of: a cooling circuit which includes: (a) a coolant jacket formed about the structure subject to high heat flux and into which coolant is introduced in liquid form, permitted to boil and discharged in gaseous form, (b) a radiator exposed to a

Hirano

1986-01-01

153

Systems Engineering Advancement Research Initiative  

E-print Network

for sharing perspectives on a topic. A research summit provides an opportunity for sharing knowledge, the summit featured research overview and project briefings on advanced systems engineering topics. SEAri research portfolio topics were described by researchers, with alternating short student research summary

de Weck, Olivier L.

154

A Virtual Engineering Framework for Simulating Advanced Power System  

SciTech Connect

In this report is described the work effort performed to provide NETL with VE-Suite based Virtual Engineering software and enhanced equipment models to support NETL's Advanced Process Engineering Co-simulation (APECS) framework for advanced power generation systems. Enhancements to the software framework facilitated an important link between APECS and the virtual engineering capabilities provided by VE-Suite (e.g., equipment and process visualization, information assimilation). Model enhancements focused on improving predictions for the performance of entrained flow coal gasifiers and important auxiliary equipment (e.g., Air Separation Units) used in coal gasification systems. In addition, a Reduced Order Model generation tool and software to provide a coupling between APECS/AspenPlus and the GE GateCycle simulation system were developed. CAPE-Open model interfaces were employed where needed. The improved simulation capability is demonstrated on selected test problems. As part of the project an Advisory Panel was formed to provide guidance on the issues on which to focus the work effort. The Advisory Panel included experts from industry and academics in gasification, CO2 capture issues, process simulation and representatives from technology developers and the electric utility industry. To optimize the benefit to NETL, REI coordinated its efforts with NETL and NETL funded projects at Iowa State University, Carnegie Mellon University and ANSYS/Fluent, Inc. The improved simulation capabilities incorporated into APECS will enable researchers and engineers to better understand the interactions of different equipment components, identify weaknesses and processes needing improvement and thereby allow more efficient, less expensive plants to be developed and brought on-line faster and in a more cost-effective manner. These enhancements to APECS represent an important step toward having a fully integrated environment for performing plant simulation and engineering. Furthermore, with little effort the modeling capabilities described in this report can be extended to support other DOE programs, such as ultra super critical boiler development, oxy-combustion boiler development or modifications to existing plants to include CO2 capture and sequestration.

Mike Bockelie; Dave Swensen; Martin Denison; Stanislav Borodai

2008-06-18

155

Engine system for motor vehicle  

SciTech Connect

An engine system of the invention comprises an internal combustion engine; a carburetor; an exhaust gas recirculation system; an exhaust gas treatment device; and a source of secondary air, in which there is provided a fluid network which interconnects the source of secondary air, the engine exhaust system at a position upstream of the exhaust gas treatment device and the exhaust gas recirculation system at a position upstream of an exhaust gas recirculation valve and there is also provided an air injection control valve fluidly disposed in the fluid network intermediate the source of secondary air and the exhaust gas recirculation system. The air injection control valve is adapted to selectively permit and prevent the admission of air to the exhaust gas recirculation system. A controller for the air injection control valve is also disclosed which comprises a detector that generates as an output signal a first signal responsive to urban driving conditions which are empirically determined to occur when the motor vehicle is driven in urban areas and a second signal responsive to rural driving conditions which are empirically determined to occur when the motor vehicle is driven in rural areas. The controller causes the air injection valve to permit the admission of air to the egr system when the detector detects the rural driving conditions.

Nakajima, Y.; Nakamura, K.; Sugihara, K.; Takami, M.

1980-12-23

156

Systems Engineering Positions New England Healthcare Engineering Partnership  

E-print Network

Systems Engineering Positions New England Healthcare Engineering Partnership (NEHCEP) An exciting, resource utilization and cost savings. The New England Healthcare Engineering Partnership (NEHCEP. There will also be opportunities to assist and consult at all facilities In our New England region: 8 medical care

de Weck, Olivier L.

157

Analysis of integrating compressed air energy storage concepts with coal gasification/combined-cycle systems for continuous power production  

SciTech Connect

A previous study sponsored by EPRI concluded that integrating a compressed-air energy storage (CAES) plant with a coal-gasification system (CGS) can reduce the required capacity and cost of the expensive gasification system. The results showed that when compared at an equal plant capacity, the capital cost of the CGS portion of the integrated CAES/CGS plant can be reduced by as much as 30% relative to the same portion of an integrated gasification combined cycle (IGCC) plant. Furthermore, the capital cost of the CAES/CGS.plant, configured as a peaking unit, was found to be slightly lower than that of the base-load IGCC plant. However, the overall economics of the CAES/CGS plant were adversely affected by the low capacity factor of the peak-load service, and ultimately, were found to be less attractive than the IGCC plant. The main objective of this study was to develop and analyze integrated CAES/CGS power plant concepts which provide for continuous (around-the-clock) operation of both the CAES reheat turboexpander train and the CGS facility. The developed concepts also provide utility-load management functions by driving the CAES compressor trains with off-peak electricity supplied through the grid. EPRI contracted with Energy Storage Power Consultants, Inc. (ESPC) to develop conceptual designs, optimized performance characteristics, and preliminary cost data for these CAES/CGS concepts, and to provide a technical and cost comparison to the IGCC plant. The CAES/CGS concepts developed by ESPC for the current study contrast from those of Reference 1.

Nakhamkin, M.; Patel, M.; Andersson, L. (Energy Storage and Power Consultants, Inc., Mountainside, NJ (United States))

1992-12-01

158

Systems Engineering Integrating Project Management, Science, Engineering, and  

E-print Network

, high altitude balloons, aircraft, and sounding rockets � Designing systems for multiple environments&C) � Guidance, navigation, and control (GNC) � Spacecraft fault management � Embedded software systems � ControlSystems Engineering Integrating Project Management, Science, Engineering, and Mission Operations

Mojzsis, Stephen J.

159

Enhanced coal gasification heated by unmixed combustion integrated with an hybrid system of SOFC\\/GT  

Microsoft Academic Search

For clean utilization of coal, enhanced gasification by in situ CO2 capture has the advantage that hydrogen production efficiency is increased while no energy is required for CO2 separation. The unmixed fuel process uses a sorbent material as CO2 carrier and consists of three coupled reactors: a coal gasifier where CO2 is captured generating a H2-rich gas that can be

Pilar Lisbona; Luis M. Romeo

2008-01-01

160

The organizational and political challenges of Enterprise Systems Engineering : a survey of senior systems engineers  

E-print Network

Systems engineering efforts are becoming increasingly complex, novel and interdependent, making traditional systems engineering approaches only partially applicable to such efforts. Consequently, a new discipline is emerging ...

Rashid, Faaiza

2008-01-01

161

Frameworks and Models in Engineering Systems / Engineering System Design  

NSDL National Science Digital Library

This class, created by Prof. Joseph Sussman of the Massachusetts Institute of Technology, provides an introduction to quantitative models and qualitative frameworks for studying complex engineering systems. Also taught is the art of abstracting a complex system into a model for purposes of analysis and design while dealing with complexity, emergent behavior, stochasticity, non-linearities and the requirements of many stakeholders with divergent objectives. The successful completion of the class requires a semester-long class project that deals with critical contemporary issues which require an integrative, interdisciplinary approach using the above models and frameworks.

Sussman, Joseph

2011-01-20

162

Systems engineering: A problem of perception  

SciTech Connect

The characterization of systems engineering as a discipline, process, procedure or a set of heuristics will have an impact on the implementation strategy, the training methodology, and operational environment. The systems engineering upgrade activities in the New Mexico Weapons Development Center and a search of systems engineering related information provides evidence of a degree of ambiguity in this characterization of systems engineering. A case is made in this article for systems engineering being the engineering discipline applied to the science of complexity. Implications of this characterization and some generic issues are delineated with the goal of providing an enterprise with a starting point for developing its business environment.

Senglaub, M.

1995-08-01

163

Heat engine generator control system  

DOEpatents

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power. 8 figs.

Rajashekara, K.; Gorti, B.V.; McMullen, S.R.; Raibert, R.J.

1998-05-12

164

Heat engine generator control system  

DOEpatents

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power.

Rajashekara, Kaushik (Carmel, IN); Gorti, Bhanuprasad Venkata (Towson, MD); McMullen, Steven Robert (Anderson, IN); Raibert, Robert Joseph (Fishers, IN)

1998-01-01

165

industrial & systems (ISE) Industrial and Systems Engineers use engineering and business prin-  

E-print Network

70 industrial & systems (ISE) Industrial and Systems Engineers use engineering and business prin to help companies compete in today's global marketplace. The Industrial and Systems Engineer's task Available · Industrial and Systems Engineering Bachelor of Science 129 units · Industrial and Systems

Rohs, Remo

166

Stirling Engine Dynamic System Modeling  

NASA Technical Reports Server (NTRS)

The Thermo-Mechanical systems branch at the Glenn Research Center focuses a large amount time on Stirling engines. These engines will be used on missions where solar power is inefficient, especially in deep space. I work with Tim Regan and Ed Lewandowski who are currently developing and validating a mathematical model for the Stirling engines. This model incorporates all aspects of the system including, mechanical, electrical and thermodynamic components. Modeling is done through Simplorer, a program capable of running simulations of the model. Once created and then proven to be accurate, a model is used for developing new ideas for engine design. My largest specific project involves varying key parameters in the model and quantifying the results. This can all be done relatively trouble-free with the help of Simplorer. Once the model is complete, Simplorer will do all the necessary calculations. The more complicated part of this project is determining which parameters to vary. Finding key parameters depends on the potential for a value to be independently altered in the design. For example, a change in one dimension may lead to a proportional change to the rest of the model, and no real progress is made. Also, the ability for a changed value to have a substantial impact on the outputs of the system is important. Results will be condensed into graphs and tables with the purpose of better communication and understanding of the data. With the changing of these parameters, a more optimal design can be created without having to purchase or build any models. Also, hours and hours of results can be simulated in minutes. In the long run, using mathematical models can save time and money. Along with this project, I have many other smaller assignments throughout the summer. My main goal is to assist in the processes of model development, validation and testing.

Nakis, Christopher G.

2004-01-01

167

Handbook of biomass downdraft gasifier engine systems  

SciTech Connect

This handbook has been prepared by the Solar Energy Research Institute under the US Department of Energy /bold Solar Technical Information Program/. It is intended as a guide to the design, testing, operation, and manufacture of small-scale (less than 200 kW (270 hp)) gasifiers. A great deal of the information will be useful for all levels of biomass gasification. The handbook is meant to be a practical guide to gasifier systems, and a minimum amount of space is devoted to questions of more theoretical interest.

Reed, T B; Das, A

1988-03-01

168

_q .. SP-6102 -" IN SYSTEMS ENGINEERING  

E-print Network

_�q .. SP-6102 -" READINGS IN SYSTEMS ENGINEERING Edited by Francis T. Hoban and William M. Lawbaugh co ! (NASA-SP-6102) REAOINGS IN SYSTEMS ENGINEERING (NASa) 215 p N93-24678 --THRU-- N93-24693 Unclas H1/31 0158570 #12;.J T ,j J #12;READINGS IN SYSTEMS ENGINEERING Edited by Francis T. Hoban

Rhoads, James

169

Hybrid Kansei engineering system and design support  

Microsoft Academic Search

In this paper, we propose the new framework of Kansei Engineering System (KES), called Hybrid KES, which can support both consumer and designer as the decision support system (DSS). Kansei Engineering is defined as “translating technology of a consumer's feeling and image for a product into design elements” (Nagamachi, 1989). It is the Kansei Engineering System which we developed to

Yukihiro Matsubara; Mitsuo Nagamachi

1997-01-01

170

Electrical, Computer, and Systems Engineering Department  

E-print Network

SSIS Engineering Research Center Center for future Energy Systems Center for automation Technologies and Systems;electrical, computer, and systems engineering 4 Engineering and Innovation MODERN ECONOMy in the "To the experiences of Japan, South Korea, India, and Brazil--among others--support this hypothesis. Once an economy

Bystroff, Chris

171

Experimental investigation on an entrained flow type biomass gasification system using coconut coir dust as powdery biomass feedstock.  

PubMed

Based on an entrained flow concept, a prototype atmospheric gasification system has been designed and developed in the laboratory for gasification of powdery biomass feedstock such as rice husks, coconut coir dust, saw dust etc. The reactor was developed by adopting L/D (height to diameter) ratio of 10, residence time of about 2s and a turn down ratio (TDR) of 1.5. The experimental investigation was carried out using coconut coir dust as biomass feedstock with a mean operating feed rate of 40 kg/h The effects of equivalence ratio in the range of 0.21-0.3, steam feed at a fixed flow rate of 12 kg/h, preheat on reactor temperature, product gas yield and tar content were investigated. The gasifier could able to attain high temperatures in the range of 976-1100 °C with gas lower heating value (LHV) and peak cold gas efficiency (CGE) of 7.86 MJ/Nm3 and 87.6% respectively. PMID:22613886

Senapati, P K; Behera, S

2012-08-01

172

Ceramic filters systems -- Necessary equipment for combined cycles based on coal gasification?  

SciTech Connect

An overview about the development of a hot gas filter technology arranging ceramic candles in a different way compared to competing technologies is shown. This technology has been developed executing an extended research program on PFBC (Pressurized Fluidized Bed Combustion). The same technology is used in gasification applications. The paper describes the benefits resulting from using ceramic candle filters in such processes and describes the available technology. Test results and different configurations using the same basic principles of the filtration process will be shown.

Wedel, G. von; Kalthoff, U. [LLB Lurgi Lentjes Babcock Energietechnik GmbH, Oberhausen (Germany)

1994-12-31

173

Integration and testing of hot desulfurization and entrained-flow gasification for power generation systems  

SciTech Connect

This second Topical Report describes the work that was completed between January 1, 1989 and December 31, 1990 in a Cooperative Agreement between Texaco and the US Department of Energy that began on September 30, 1987. During the period that is covered in this report, the development and optimization of in-situ and external desulfurization processes were pursued. The research effort included bench scale testing, PDU scoping tests, process economic studies and advanced instrument testing. Two bench scale studies were performed at the Research Triangle Institute with zinc titanate sorbent to obtain data on its cycle life, sulfur capacity, durability and the effect of chlorides. These studies quantify sulfur capture during simulated air and oxygen-blown gasification for two zinc titanate formulations. Eight PDU runs for a total of 20 days of operation were conducted to evaluate the performance of candidate sorbents for both in-situ and external desulfurization. A total of 47 tests were completed with oxygen and air-blown gasification. Candidate sorbents included iron oxide for in-situ desulfurization and calcium based and mixed metal oxides for external desulfurization. Gasifier performance and sorbent sulfur capture are compared for both air-blown and oxygen-blown operation.

Robin, A.M.; Kassman, J.S.; Leininger, T.F.; Wolfenbarger, J.K.; Wu, C.M.; Yang, P.P.

1991-09-01

174

Development of a Hot-Gas-Cleanup System for Integrated Coal-Gasification/Molten-Carbonate Fuel-Cell Power Plants. Quarterly Progress Report, April-June 1983.  

National Technical Information Service (NTIS)

The program to develop a hot gas cleanup system for integrated coal gasification/molten carbonate fuel cell power plants is divided into the following six tasks: (1) project plan and design of experiments; (2) exploratory and supporting studies; (3) Desig...

S. E. Lyke, L. J. Sealock, G. L. Roberts

1983-01-01

175

Rangan Banerjee Energy Systems Engineering  

E-print Network

, Additional Cost #12;Renewable Energy Options Wind Solar Small Hydro Biomass Tidal Energy Wave Energy Ocean ¡ ¢ £ ¡ ¤ ¥ ¦ ¡ ¢ § ¡ ¦ ¨ ¢£ ¤ Rangan Banerjee Energy Systems Engineering IIT Bombay Rotary Club¨ © © ¨ ¨ #12; ¡ ¢ £ ¤ ¥ ¤ £ ¢ ¦ § ¨ © ¡ £ ¡ ¡ © § ¦ § ¡ Diesel 0.4% Wind 1.0% Nuclear 2.5% Gas 8.7% Coal

Banerjee, Rangan

176

Systems Engineering Integrating Project Management, Science, Engineering, and  

E-print Network

Systems Engineering Integrating Project Management, Science, Engineering, and Mission Operations, to component supplier (mission list: http://lasp .colorado.edu/home/missions-projects/) · Mission (MESSENGER), PPS (Voyager 1); many built and awaiting launch: EXIS (GOES-R), SIM (TSIS), TIM (TSIS), RS

Mojzsis, Stephen J.

177

Applying System Engineering to Pharmaceutical Safety  

E-print Network

While engineering techniques are used in the development of medical devices and have been applied to individual healthcare processes, such as the use of checklists in surgery and ICUs, the application of system engineering ...

Couturier, Matthieu

178

REPOSITORY ENGINEERED BARRIER SYSTEM DESIGN  

SciTech Connect

A Viability Assessment (VA) for the Yucca Mountain Project is being completed for delivery in September of 1998. A major element of the VA is the design of a high level waste repository on the Nevada Test Site. The repository is made up of surface and subsurface facilities. The engineered barrier includes the man-made elements of the system that act to retard the migration of radionuclides from a geologic repository. They act in conjunction with the geologic barriers present at Yucca Mountain. The engineered barrier system (EBS) consists of the Waste Package and the underground facility. The focus of this paper is the status of the design of the underground facility portion of the EBS. In addition to a robust waste package, the EBS components in the reference design include a number of features that impede naturally occurring infiltration from reaching and corroding the waste packages. In addition, and as a defense-in-depth strategy, a number of other optional features are being considered. They include drip shields above the waste packages to intercept dripping water and granular backfill around the waste packages to form a diffusion barrier. Plans are being made to test a number of the EBS materials and structures. The Viability Assessment document will discuss the various EBS options and alternative designs and lay out a plan for determining those to be included in the License Application to the Nuclear Regulatory Commission (NRC) scheduled for completion in 2002.

DANIEL G. MCKENZIE III PE, DR. KALYAN K. BHATTACHARYYA AND PAUL G. HARRINGTON

1998-07-29

179

DEPARTMENT OF INDUSTRIAL AND SYSTEMS ENGINEERING Dwight look College of Engineering  

E-print Network

DEPARTMENT OF INDUSTRIAL AND SYSTEMS ENGINEERING Dwight look College of Engineering .NOTICE of Industrial &Systems Engineering; participate in scholarly activities such as conducting research.D. in industrial and systems engineering, cognitive psychology or a closely related discipline. SALARY

Behmer, Spencer T.

180

Graduate School of Life Science and Systems Engineering School of Engineering  

E-print Network

4 5 Graduate School of Life Science and Systems Engineering 1st Year School of Engineering of Materials Science and Engineering Department of Integrated System Engineering Electrical Engineering Course Engineering Department of Materials Science Department of Applied Science for Integrated System Engineering

Kourai, Kenichi

181

Systems engineering and analysis. Third edition  

Microsoft Academic Search

The topics presented in this book have been organized into 6 parts and 19 chapters. Part 1 presents an introduction to systems and systems engineering in the context of system science and good engineering practice. Part 2 addresses the system design process as a series of evolutionary steps, progressing from the identification of a need through conceptual design, preliminary design,

B. S. Blanchard; W. J. Fabrycky

1998-01-01

182

Egr control system for diesel engine  

Microsoft Academic Search

An egr control system for a diesel engine, comprises an egr passageway connecting an intake passageway and an exhaust passageway to recirculate engine exhaust gas back to the engine, an egr control valve operatively disposed in the egr passageway to control the flow of the recirculated exhaust gas passing through the egr passageway, a detecting device for detecting at least

M. Shiobara; Y. Yoshiba

1983-01-01

183

EGR control system for diesel engine  

Microsoft Academic Search

In an EGR control system for a diesel engine, the EGR amount is controlled by controlling the pressure in a diaphragm chamber of an EGR valve using the output signal of a computer, responsive to signals from a plurality of engine running condition sensors, for calculating the EGR amount wich corrections according to the engine running conditions and the excess

K. Sekiguehi; T. Igashira; H. Kawai; T. Tanaka

1984-01-01

184

Fuel conservation system for internal combustion engines  

Microsoft Academic Search

A system is provided for varying the number of active cylinders in a multi-cylinder internal combustion engine, in response to the operating requirements of the engine. When the engine reaches that part of its operating range where the torque requirement is such that operation of all of the cylinders is not required to provide adequate and efficient power, certain cylinders

1980-01-01

185

ENGINEERING GRaduatE PRoGRams Biological SyStemS engineering Biomedical engineering chemical engineering civil and environmental engineering  

E-print Network

modeling, environmental engineering, fluid mechanics and rheology, materials processing, nanotechnology resources engineering (hydraulics and fluid mechanics, hydrology, and systems planning and designENGINEERING GRaduatE PRoGRams Biological SyStemS engineering § Biomedical engineering § chemical

California at Davis, University of

186

ENGINEERING GRaduatE PRoGRams Biological SyStemS engineering Biomedical engineering chemical engineering civil and environmental engineering  

E-print Network

properties and devices, fluid mechanics and rheology, green engineering and design, interfaces, mathematical resources engineering (hydraulics and fluid mechanics, hydrology, and systems planning and designENGINEERING GRaduatE PRoGRams Biological SyStemS engineering § Biomedical engineering § chemical

California at Davis, University of

187

Coal gasification system with a modulated on/off control system  

DOEpatents

A modulated control system is provided for improving regulation of the bed level in a fixed-bed coal gasifier into which coal is fed from a rotary coal feeder. A nuclear bed level gauge using a cobalt source and an ion chamber detector is used to detect the coal bed level in the gasifier. The detector signal is compared to a bed level set point signal in a primary controller which operates in proportional/integral modes to produce an error signal. The error signal is modulated by the injection of a triangular wave signal of a frequency of about 0.0004 Hz and an amplitude of about 80% of the primary deadband. The modulated error signal is fed to a triple-deadband secondary controller which jogs the coal feeder speed up or down by on/off control of a feeder speed change driver such that the gasifier bed level is driven toward the set point while preventing excessive cycling (oscillation) common in on/off mode automatic controllers of this type. Regulation of the bed level is achieved without excessive feeder speed control jogging.

Fasching, George E. (Morgantown, WV)

1984-01-01

188

Integrated Biomass Gasification with Catalytic Partial Oxidation for Selective Tar Conversion  

SciTech Connect

Biomass gasification is a flexible and efficient way of utilizing widely available domestic renewable resources. Syngas from biomass has the potential for biofuels production, which will enhance energy security and environmental benefits. Additionally, with the successful development of low Btu fuel engines (e.g. GE Jenbacher engines), syngas from biomass can be efficiently used for power/heat co-generation. However, biomass gasification has not been widely commercialized because of a number of technical/economic issues related to gasifier design and syngas cleanup. Biomass gasification, due to its scale limitation, cannot afford to use pure oxygen as the gasification agent that used in coal gasification. Because, it uses air instead of oxygen, the biomass gasification temperature is much lower than well-understood coal gasification. The low temperature leads to a lot of tar formation and the tar can gum up the downstream equipment. Thus, the biomass gasification tar removal is a critical technology challenge for all types of biomass gasifiers. This USDA/DOE funded program (award number: DE-FG36-O8GO18085) aims to develop an advanced catalytic tar conversion system that can economically and efficiently convert tar into useful light gases (such as syngas) for downstream fuel synthesis or power generation. This program has been executed by GE Global Research in Irvine, CA, in collaboration with Professor Lanny Schmidt's group at the University of Minnesota (UoMn). Biomass gasification produces a raw syngas stream containing H2, CO, CO2, H2O, CH4 and other hydrocarbons, tars, char, and ash. Tars are defined as organic compounds that are condensable at room temperature and are assumed to be largely aromatic. Downstream units in biomass gasification such as gas engine, turbine or fuel synthesis reactors require stringent control in syngas quality, especially tar content to avoid plugging (gum) of downstream equipment. Tar- and ash-free syngas streams are a critical requirement for commercial deployment of biomass-based power/heat co-generation and biofuels production. There are several commonly used syngas clean-up technologies: (1) Syngas cooling and water scrubbing has been commercially proven but efficiency is low and it is only effective at small scales. This route is accompanied with troublesome wastewater treatment. (2) The tar filtration method requires frequent filter replacement and solid residue treatment, leading to high operation and capital costs. (3) Thermal destruction typically operates at temperatures higher than 1000oC. It has slow kinetics and potential soot formation issues. The system is expensive and materials are not reliable at high temperatures. (4) In-bed cracking catalysts show rapid deactivation, with durability to be demonstrated. (5) External catalytic cracking or steam reforming has low thermal efficiency and is faced with problematic catalyst coking. Under this program, catalytic partial oxidation (CPO) is being evaluated for syngas tar clean-up in biomass gasification. The CPO reaction is exothermic, implying that no external heat is needed and the system is of high thermal efficiency. CPO is capable of processing large gas volume, indicating a very compact catalyst bed and a low reactor cost. Instead of traditional physical removal of tar, the CPO concept converts tar into useful light gases (eg. CO, H2, CH4). This eliminates waste treatment and disposal requirements. All those advantages make the CPO catalytic tar conversion system a viable solution for biomass gasification downstream gas clean-up. This program was conducted from October 1 2008 to February 28 2011 and divided into five major tasks. - Task A: Perform conceptual design and conduct preliminary system and economic analysis (Q1 2009 ~ Q2 2009) - Task B: Biomass gasification tests, product characterization, and CPO tar conversion catalyst preparation. This task will be conducted after completing process design and system economics analysis. Major milestones include identification of syngas cleaning requirements for proposed system

Zhang, Lingzhi; Wei, Wei; Manke, Jeff; Vazquez, Arturo; Thompson, Jeff; Thompson, Mark

2011-05-28

189

Space shuttle main engine: Hydraulic system  

NASA Technical Reports Server (NTRS)

The hydraulic actuation system of the space shuttle main engine is discussed. The system consists of five electrohydraulic actuators and a single engine filter used to control the five different propellant valves, which in turn control thrust and mixture ratio of the space shuttle main engine. The hydraulic actuation system provides this control with a precision of 98.7 percent or an error in position no greater than 1.3 percent of full scale rotational travel for critical positions.

Geller, G.; Lamb, C. D.

1981-01-01

190

Engine Structures Modeling Software System (ESMOSS)  

NASA Technical Reports Server (NTRS)

Engine Structures Modeling Software System (ESMOSS) is the development of a specialized software system for the construction of geometric descriptive and discrete analytical models of engine parts, components, and substructures which can be transferred to finite element analysis programs such as NASTRAN. The NASA Lewis Engine Structures Program is concerned with the development of technology for the rational structural design and analysis of advanced gas turbine engines with emphasis on advanced structural analysis, structural dynamics, structural aspects of aeroelasticity, and life prediction. Fundamental and common to all of these developments is the need for geometric and analytical model descriptions at various engine assembly levels which are generated using ESMOSS.

1991-01-01

191

2010 Worldwide Gasification Database  

DOE Data Explorer

The 2010 Worldwide Gasification Database describes the current world gasification industry and identifies near-term planned capacity additions. The database lists gasification projects and includes information (e.g., plant location, number and type of gasifiers, syngas capacity, feedstock, and products). The database reveals that the worldwide gasification capacity has continued to grow for the past several decades and is now at 70,817 megawatts thermal (MWth) of syngas output at 144 operating plants with a total of 412 gasifiers.

192

Tank waste remediation system engineering plan  

SciTech Connect

This Engineering Plan describes the engineering process and controls that will be in place to support the Technical Baseline definition and manage its evolution and implementation to the field operations. This plan provides the vision for the engineering required to support the retrieval and disposal mission through Phase 1 and 2, which includes integrated data management of the Technical Baseline. Further, this plan describes the approach for moving from the ``as is`` condition of engineering practice, systems, and facilities to the desired ``to be`` configuration. To make this transition, Tank Waste Remediation System (TWRS) Engineering will become a center of excellence for TWRS which,will perform engineering in the most effective manner to meet the mission. TWRS engineering will process deviations from sitewide systems if necessary to meet the mission most effectively.

Rifaey, S.H.

1998-01-09

193

Characterization of Filter Elements for Service in a Coal Gasification Environment  

SciTech Connect

The Power Systems Development Facility (PSDF) is a joint Department of Energy/Industry sponsored engineering-scale facility for testing advanced coal-based power generation technologies. High temperature, high pressure gas cleaning is critical to many of these advanced technologies. Barrier filter elements that can operate continuously for nearly 9000 hours are required for a successful gas cleaning system for use in commercial power generation. Since late 1999, the Kellogg Brown & Root Transport reactor at the PSDF has been operated in gasification mode. This paper describes the test results for filter elements operating in the Siemens-Westinghouse particle collection device (PCD) with the Transport reactor in gasification mode. Operating conditions in the PCD have varied during gasification operation as described elsewhere in these proceedings (Martin et al, 2002).

Spain, J.D.

2002-09-19

194

Surface Gasification Materials Program: Semiannual progress report for the period ending September 30, 1986. [Iron aluminide  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. One of the goals of the program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. Another goal is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. This semiannual progress report covers: (1) protective coatings and claddings - application/evaluation; (2) electroslag component casting; (3) materials development for solid oxide oxygen production unit; and (4) development of iron aluminides.

Not Available

1987-01-01

195

ATK Launch Systems Engineering NASA Programs Engineering Examples  

NASA Technical Reports Server (NTRS)

This presentation provides an overview of the work done at ATK Launch Systems with and indication of how engineering knowledge can be applied to several real world problems. All material in the presentation has been screened to meet ITAR restrictions. The information provided is a compilation of general engineering knowledge and material available in the public domain. The presentation provides an overview of ATK Launch Systems and NASA programs. Some discussion is provided about the types of engineering conducted at the Promontory plant with added detail about RSRM nozzle engineering. Some brief examples of examples of nozzle technical issues with regard to adhesives and phenolics are shared. These technical issue discussions are based on material available in the public domain.

Richardson, David

2007-01-01

196

Overspeed limiter schemes for Full Authority Digital Engine Control System  

Microsoft Academic Search

Engine control system of aircraft is used for controlling the engine parameters. In today's world Full Authority Digital Engine Control System (FADECS) is used for controlling engine of aircrafts. FADEC system broadly consists of the hydro-mechanical systems, sensors, harnesses, dedicated electronics and embedded software for controlling the engine parameters. FADEC system controls various engine parameters as per the control laws

P. Gupta

2010-01-01

197

Earth Systems Science and Engineering  

SciTech Connect

Providing the essential energy and water systems to support human needs while understanding and addressing their environmental consequences is a watershed problem for the 21st century. The LLNL Earth System Science and Engineering Program seeks to provide the scientific understanding and technological expertise to help provide solutions at both global and regional scales. Our work is highly collaborative with universities, laboratories and industrial partners across the world and involves observational data, laboratory experiments, and numerical simulations. The energy systems we have enjoyed for the last 100 years have resulted in the advanced standard of living in the developed world and a major emerging problem with climate change. Now we face a simultaneous realization that our reliance on fossil fuels is a source of conflict and economic disruption as well as causing potentially abrupt, even catastrophic global climate change. The climate and energy problem is perhaps the greatest challenge ever faced by mankind. Fossil fuel remains the least expensive and most available source of energy and the basis of our economy. The use of fossil fuels, especially over the last 100 years has led to a 30% increase in CO{sub 2} in the atmosphere. The problem is growing. The population of the Earth will increase by several billion people in the next 50 years. If economic growth is to continue, the demand for energy is estimated to approximately double in the next 50 years so that we will need approximately 10 TW more energy than the 15 TW we use now. Much of this demand will come from the developing world where most of the population growth will occur and where advanced energy technology is not generally used. The problem affects and is affected by a complex system of systems. The climate and energy problem will affect resources, social structure and the probability of increased conflict. No one person, no one nation, no one technology can solve the problem. There is no parallel precedent on which to model a solution. On these grounds, we have chosen to tackle four key tasks: (1) Understanding the natural Earth system and anthropogenic systems examining key forcings and processes driving these systems and the interactions between systems; (2) Identify climate change impacts important to society and develop strategies and technologies to adapt to the climate change that is inevitable given past, current, and potential emissions; (3) Developing strategies and technologies to reduce/eliminate greenhouse gas emissions thereby mitigating climate change while generating energy that is economically and socially viable; and (4) Engaging with appropriate economic, legal, social, and political structures to inform key decisions.

Rotman, D A

2006-02-21

198

Graduate School of Creative Science and Engineering Department of Industrial and Management Systems Engineering  

E-print Network

Graduate School of Creative Science and Engineering Department of Industrial and Management and Engineering Department of Industrial and Management Systems Engineering Research Instruction Application; Graduate School of Creative Science and Engineering Department of Industrial and Management Systems

Kaji, Hajime

199

Coal gasification: Kellogg's coal gasification process  

Microsoft Academic Search

Gasification of coal in a bath of molten sodium carbonate through which ; steam is passed is the basis of the Kellogg Coal Gasification process. The bath ; of moiten salt strongly catalyzes the basic steam- coal reaction permi tting ; essentially complete gasificntion of coal at reduced temperature. The molten ; salt can be used to supply heat to

W. C. Schreiner; G. T. Skaperdas

1973-01-01

200

System Engineering of Autonomous Space Vehicles  

NASA Technical Reports Server (NTRS)

Human exploration of the solar system requires fully autonomous systems when travelling more than 5 light minutes from Earth. This autonomy is necessary to manage a large, complex spacecraft with limited crew members and skills available. The communication latency requires the vehicle to deal with events with only limited crew interaction in most cases. The engineering of these systems requires an extensive knowledge of the spacecraft systems, information theory, and autonomous algorithm characteristics. The characteristics of the spacecraft systems must be matched with the autonomous algorithm characteristics to reliably monitor and control the system. This presents a large system engineering problem. Recent work on product-focused, elegant system engineering will be applied to this application, looking at the full autonomy stack, the matching of autonomous systems to spacecraft systems, and the integration of different types of algorithms. Each of these areas will be outlined and a general approach defined for system engineering to provide the optimal solution to the given application context.

Watson, Michael D.; Johnson, Stephen B.; Trevino, Luis

2014-01-01

201

Fixed-bed gasification research using US coals. Volume 10. Gasification of Benton lignite  

SciTech Connect

A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the tenth volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of Benton lignite. The period of gasification test was November 1-8, 1983. 16 refs., 22 figs., 19 tabs.

Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

1985-05-01

202

40 CFR 90.307 - Engine cooling system.  

Code of Federal Regulations, 2010 CFR

An engine cooling system is required with sufficient capacity to maintain the engine at normal operating temperatures as prescribed by the engine manufacturer. Auxiliary fan(s) may be used to maintain sufficient engine cooling during engine dynamometer...

2010-07-01

203

Engine system assessment study using Martian propellants  

NASA Astrophysics Data System (ADS)

A top-level feasibility study was conducted that identified and characterized promising chemical propulsion system designs which use two or more of the following propellant combinations: LOX/H2, LOX/CH4, and LOX/CO. The engine systems examined emphasized the usage of common subsystem/component hardware where possible. In support of this study, numerous mission scenarios were characterized that used various combinations of Earth, lunar, and Mars propellants to establish engine system requirements to assess the promising engine system design concept examined, and to determine overall exploration leverage of such systems compared to state-of-the-art cryogenic (LOX/H2) propulsion systems. Initially in the study, critical propulsion system technologies were assessed. Candidate expander and gas generator cycle LOX/H2/CO, LOX/H2/CH4, and LOX/CO/CH4 engine system designs were parametrically evaluated. From this evaluation baseline, tripropellant Mars Transfer Vehicle (MTV) LOX cooled and bipropellant Lunar Excursion Vehicle (LEV) and Mars Excursion Vehicle (MEV) engine systems were identified. Representative tankage designs for a MTV were also investigated. Re-evaluation of the missions using the baseline engine design showed that in general the slightly lower performance, smaller, lower weight gas generator cycle-based engines required less overall mission Mars and in situ propellant production (ISPP) infrastructure support compared to the larger, heavier, higher performing expander cycle engine systems.

Pelaccio, Dennis; Jacobs, Mark; Scheil, Christine; Collins, John

1992-06-01

204

Engine system assessment study using Martian propellants  

NASA Technical Reports Server (NTRS)

A top-level feasibility study was conducted that identified and characterized promising chemical propulsion system designs which use two or more of the following propellant combinations: LOX/H2, LOX/CH4, and LOX/CO. The engine systems examined emphasized the usage of common subsystem/component hardware where possible. In support of this study, numerous mission scenarios were characterized that used various combinations of Earth, lunar, and Mars propellants to establish engine system requirements to assess the promising engine system design concept examined, and to determine overall exploration leverage of such systems compared to state-of-the-art cryogenic (LOX/H2) propulsion systems. Initially in the study, critical propulsion system technologies were assessed. Candidate expander and gas generator cycle LOX/H2/CO, LOX/H2/CH4, and LOX/CO/CH4 engine system designs were parametrically evaluated. From this evaluation baseline, tripropellant Mars Transfer Vehicle (MTV) LOX cooled and bipropellant Lunar Excursion Vehicle (LEV) and Mars Excursion Vehicle (MEV) engine systems were identified. Representative tankage designs for a MTV were also investigated. Re-evaluation of the missions using the baseline engine design showed that in general the slightly lower performance, smaller, lower weight gas generator cycle-based engines required less overall mission Mars and in situ propellant production (ISPP) infrastructure support compared to the larger, heavier, higher performing expander cycle engine systems.

Pelaccio, Dennis; Jacobs, Mark; Scheil, Christine; Collins, John

1992-01-01

205

System Study for Axial Vane Engine Technology  

NASA Technical Reports Server (NTRS)

The purpose of this engine feasibility study was to determine the benefits that can be achieved by incorporating positive displacement axial vane compression and expansion stages into high bypass turbofan engines. These positive-displacement stages would replace some or all of the conventional compressor and turbine stages in the turbine engine, but not the fan. The study considered combustion occurring internal to an axial vane component (i.e., Diesel engine replacing the standard turbine engine combustor, burner, and turbine); and external continuous flow combustion with an axial vane compressor and an axial vane turbine replacing conventional compressor and turbine systems.

Badley, Patrick R.; Smith, Michael R.; Gould, Cedric O.

2008-01-01

206

Center for Information & Systems Engineering  

E-print Network

of scholarship, funding and industry collaboration, CISE faculty bring vast research experience to addressing Engineering is a groundbreaking graduate program that cuts across traditional engineering departments to en & Control Research in this area aims at advancing the state of the art in the control and optimization

Goldberg, Bennett

207

Turbocharged engine exhaust gas recirculation system  

Microsoft Academic Search

Improved exhaust gas recirculation systems for turbocharged gas engines that include an exhaust pipe, a turbocharger connected thereto, and a carburetor connected with a source of gas for the engine. The recirculation system includes an air conduit extending from the turbocharger compressor discharge to a venturi, an exhaust gas conduit that extends from a connection with the exhaust pipe between

Stachowicz

1984-01-01

208

Hanno Kogaku II Chemical System Engineering  

E-print Network

Hanno Kogaku II Chemical System Engineering Instructors: Prof. S. Ted Oyama, Dept. of Chemical System Engineering Hongo 7-3-1, Bunkyo-ku Tokyo 113-8656 Text: H. S. Fogler, Elements of Chemical changes. Considerable emphasis will be placed on solving non-linar and differential equations using

Yamamoto, Hirosuke

209

Integrated supercritical water gasification combined cycle (IGCC) systems for improved performance and reduced operating costs in existing plants  

SciTech Connect

A revolutionary hydrothermal heat recovery steam generator (HRSG) is being developed to produce clean fuels for gas turbines from slurries and emulsions of opportunity fuels. Water can be above 80% by weight and solids below 20%, including coal fines, coal water fuels, biomass, composted municipal refuse, sewage sludge and bitumen/Orimulsion. The patented HRSG tubes use a commercial method of particle scrubbing to improve heat transfer and prevent corrosion and deposition on heat transfer surfaces. A continuous-flow pilot plant is planned to test the HRSG over a wide range of operating conditions, including the supercritical conditions of water, above 221 bar (3,205 psia) and 374 C (705 F). Bench scale data shows, that supercritical water gasification below 580 C (1,076 F) and low residence time without catalysts or an oxidizer can produce a char product that can contain carbon up to the amount of fixed carbon in the proximate analysis of the solids in the feed. This char can be burned with coal in an existing combustion system to provide the heat required for gasification. The new HRSG tubes can be retrofitted into existing power plant boilers for repowering of existing plants for improved performance and reduced costs. A special condensing turbine allows final low-temperature cleaning and maintains quality and combustibility of the fuel vapor for modern gas turbine in the new Vapor Transmission Cycle (VTC). Increased power output and efficiency can be provided for existing plants, while reducing fuel costs. A preliminary computer-based process simulation model has been prepared that includes material and energy balances that simulate commercial-scale operations of the VTC on sewage sludge and coal. Results predict over 40% HHV thermal efficiency to electric power from sewage sludge at more than 83% water by weight. The system appears to become autothermal (no supplemental fuel required) at about 35% fixed carbon in the feed. Thus, bituminous and lignite coal slurries could be gasified at less than 25% coal and more than 75% water. Preliminary life cycle cost analyses indicate that disposal fees for sewage sludge improve operating economics over fuel that must be purchased, the cost and schedule advantages of natural gas-fired combined cycle systems are preserved. Sensitivity analyses show that increasing capital costs by 50% can be offset by an increase in sewage sludge disposal fees of $10/metric ton.

Tolman, R.; Parkinson, W.J.

1999-07-01

210

Dynamic systems-engineering process - The application of concurrent engineering  

NASA Technical Reports Server (NTRS)

A system engineering methodology is described which enables users, particulary NASA and DOD, to accommodate changing needs; incorporate emerging technologies; identify, quantify, and manage system risks; manage evolving functional requirements; track the changing environment; and reduce system life-cycle costs. The approach is a concurrent, dynamic one which starts by constructing a performance model defining the required system functions and the interrelationships. A detailed probabilistic risk assessment of the system elements and their interrelationships is performed, and quantitative analysis of the reliability and maintainability of an engineering system allows its different technical and process failure modes to be identified and their probabilities to be computed. Decision makers can choose technical solutions that maximize an objective function and minimize the probability of failure under resource constraints.

Wiskerchen, Michael J.; Pittman, R. Bruce

1989-01-01

211

Surface Gasification Materials Program. Semiannual progress report for the period ending September 30, 1985  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. One of the goals of the program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. Another goal is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and furture large-scale plants can be properly selected and specified. Contents of this report include: (1) corrosion studies of plant materials surveillance tests; (2) slagging gasifier refractories - application/evaluation; (3) protective coatings and claddings - application/evaluation; (4) corrosion of structural ceramics in coal gasification environments; (5) advanced pressure vessel materials technology; (6) electroslag component casting; (7) production and evaluation of electroslag casting; and (8) materials review and component failure analysis in support of coal gasification processes and plants.

Not Available

1985-12-01

212

Measuring Systems Engineering Success: Insights from Baseball  

E-print Network

Optimizing the efficiency of socio-technical systems and determining accurate measurements of performance is a critical issue in many systems engineering enterprises. In our analysis we explore some of the recurring themes ...

Blackburn, Craig

2008-01-01

213

Measuring Systems Engineering Success: Insights from Baseball  

E-print Network

Optimizing the efficiency of socio-technical systems and determining accurate measurements of performance is a critical issue in many systems engineering enterprises. In our analysis we explore some of the recurring themes ...

Blackburn, Craig

2008-06-15

214

Screening of low cost sorbents for arsenic and mercury capture in gasification systems  

SciTech Connect

A novel laboratory-scale fixed-bed reactor has been developed to investigate trace metal capture on selected sorbents for cleaning the hot raw gas in Integrated Gasification Combined Cycle (IGCC) power plants. The new reactor design is presented, together with initial results for mercury and arsenic capture on five sorbents. It was expected that the capture efficiency of sorbents would decrease with increasing temperature. However, a commercial activated carbon, Norit Darco 'Hg', and a pyrolysis char prepared from scrap tire rubber exhibit similar efficiencies for arsenic at 200 and at 400{sup o}C (70% and 50%, respectively). Meta-kaolinite and fly ash both exhibit an efficiency of around 50% at 200{sup o}C, which then dropped as the test temperature was increased to 400{sup o}C. Activated scrap tire char performed better at 200{sup o}C than the pyrolysis char showing an arsenic capture capacity similar to that of commercial Norit Darco 'Hg'; however, efficiency dropped to below 40% at 400{sup o}C. These results suggest that the capture mechanism of arsenic (As4) is more complex than purely physical adsorption onto the sorbents. Certain elements within the sorbents may have significant importance for chemical adsorption, in addition to the effect of surface area, as determined by the BET method. This was indeed the case for the mercury capture efficiency for all four sorbents tested. Three of the sorbents tested retained 90% of the mercury when operated at 100{sup o}C. As the temperature increased, the efficiency of activated carbon and pyrolysis char reduced significantly. Curiously, despite having the smallest Brunauer-Emmet-Teller (BET) surface area, a pf-combustion ash was the most effective in capturing mercury over the temperature range studied. These observations suggest that the observed mercury capture was not purely physical adsorption but a combination of physical and chemical processes. 27 refs., 4 figs., 4 tabs.

Cedric Charpenteau; Revata Seneviratne; Anthe George; Marcos Millan; Denis R. Dugwell; Rafael Kandiyoti [Imperial College London, London (United Kingdom). Department of Chemical Engineering

2007-09-15

215

NASA engine system technology programs - An overview  

NASA Technical Reports Server (NTRS)

The various propulsion systems technology programs are examined. The Stratospheric Cruise Emission Reduction program has the objective to explore and demonstrate advanced technology fuel preparation and combustion systems which produce very low emission levels, particularly with respect to the oxides of nitrogen, during high altitude cruising flight. Other programs considered include the Quiet, Clean, General Aviation Turbofan program, the Variable Cycle Engine Technology program, the Helicopter Transmission Technology program, the Broad Specification Fuels Technology program, the Engine Component Improvement program, the Advanced Turboprop Technology program, the Supersonic Cruise Propulsion Technology program, the Materials for Advanced Turbine Engines program, and the Aeroelasticity of Turbine Engines program.

Johnson, H. W.; Conrad, E. W.

1978-01-01

216

RESULTS OF THE TECHNICAL AND ECONOMIC FEASIBILITY ANALYSIS FOR A NOVEL BIOMASS GASIFICATION-BASED POWER GENERATION SYSTEM FOR THE FOREST PRODUCTS INDUSTRY  

SciTech Connect

In 2001, the Gas Technology Institute (GTI) entered into Cooperative Agreement DE-FC26-01NT41108 with the U.S. Department of Energy (DOE) for an Agenda 2020 project to develop an advanced biomass gasification-based power generation system for near-term deployment in the Forest Products Industry (FPI). The advanced power system combines three advanced components, including biomass gasification, 3-stage stoker-fired combustion for biomass conversion, and externally recuperated gas turbines (ERGTs) for power generation. The primary performance goals for the advanced power system are to provide increased self-generated power production for the mill and to increase wastewood utilization while decreasing fossil fuel use. Additional goals are to reduce boiler NOx and CO{sub 2} emissions. The current study was conducted to determine the technical and economic feasibility of an Advanced Power Generation System capable of meeting these goals so that a capital investment decision can be made regarding its implementation at a paper mill demonstration site in DeRidder, LA. Preliminary designs and cost estimates were developed for all major equipment, boiler modifications and balance of plant requirements including all utilities required for the project. A three-step implementation plan was developed to reduce technology risk. The plant design was found to meet the primary objectives of the project for increased bark utilization, decreased fossil fuel use, and increased self-generated power in the mill. Bark utilization for the modified plant is significantly higher (90-130%) than current operation compared to the 50% design goal. For equivalent steam production, the total gas usage for the fully implemented plant is 29% lower than current operation. While the current average steam production from No.2 Boiler is about 213,000 lb/h, the total steam production from the modified plant is 379,000 lb/h. This steam production increase will be accomplished at a grate heat release rate (GHRR) equal to the original boiler design. Boiler efficiencies (cogeneration-steam plus air) is increased from the original design value of 70% to 78.9% due to a combination of improved burnout, operation with lower excess air, and drier fuel. For the fully implemented plant, the thermal efficiency of fuel to electricity conversion is 79.8% in the cogeneration mode, 5% above the design goal. Finally, self-generated electricity will be increased from the 10.8 MW currently attributable to No.2 Boiler to 46.7MW, an increase of 332%. Environmental benefits derived from the system include a reduction in NOx emissions from the boiler of about 30-50% (90-130 tons/year) through syngas reburning, improved carbon burnout and lower excess air. This does not count NOx reduction that may be associated with replacement of purchased electricity. The project would reduce CO{sub 2} emissions from the generation of electricity to meet the mill's power requirements, including 50,000 tons/yr from a net reduction in gas usage in the mill and an additional 410,000 tons/yr reduction in CO{sub 2} emissions due to a 34 MW reduction of purchased electricity. The total CO{sub 2} reduction amounts to about 33% of the CO{sub 2} currently generated to meet the mills electricity requirement. The overall conclusion of the study is that while significant engineering challenges are presented by the proposed system, they can be met with operationally acceptable and cost effective solutions. The benefits of the system can be realized in an economic manner, with a simple payback period on the order of 6 years. The results of the study are applicable to many paper mills in the U.S. firing woodwastes and other solid fuels for steam and power production.

Bruce Bryan; Joseph Rabovitser; Sunil Ghose; Jim Patel

2003-11-01

217

Egr control system for diesel engine  

SciTech Connect

An egr control system for a diesel engine, comprises an egr passageway connecting an intake passageway and an exhaust passageway to recirculate engine exhaust gas back to the engine, an egr control valve operatively disposed in the egr passageway to control the flow of the recirculated exhaust gas passing through the egr passageway, a detecting device for detecting at least one of engine speed, engine load and engine coolant temperature to produce at least a signal dependent thereon, and a control device for controlling the operation of the egr control valve in response to the signal from the detecting device, thereby controlling the amount of the recirculated exhaust gas in accordance with engine operating conditions.

Shiobara, M.; Yoshiba, Y.

1983-06-14

218

Noncatalytic gasification of isooctane in supercritical water: A Strategy for high-yield hydrogen production  

Microsoft Academic Search

Continuous supercritical water gasification of isooctane, a model gasoline compound, is investigated using an updraft gasification system. A new reactor material, Haynes® 230® alloy, is employed to run gasification reactions at high temperature and pressure (763 ± 2 °C; 25 MPa). A large-volume reactor is used (170 mL) to enable the gasification to be run at a long residence time, up to 120 s. Various gasification

Ratna F. Susanti; Agung Nugroho; Jihye Lee; Yunje Kim; Jaehoon Kim

2011-01-01

219

Surface Gasification Materials Program semiannual progress report for the period ending March 31, 1986. [Fe/sub 3/Al (iron aluminides)  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. One of the goals of the program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. Another goal is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. Contents of this semiannual progress report include: (1) protective coatings and claddings - application/evaluation; (2) corrosion of structural ceramics in coal gasification environments; (3) electroslag component casting; and (4) development of iron aluminides. 8 figs., 14 tabs.

Not Available

1986-06-01

220

Engine Data Interpretation System (EDIS), phase 2  

NASA Technical Reports Server (NTRS)

A prototype of an expert system was developed which applies qualitative constraint-based reasoning to the task of post-test analysis of data resulting from a rocket engine firing. Data anomalies are detected and corresponding faults are diagnosed. Engine behavior is reconstructed using measured data and knowledge about engine behavior. Knowledge about common faults guides but does not restrict the search for the best explanation in terms of hypothesized faults. The system contains domain knowledge about the behavior of common rocket engine components and was configured for use with the Space Shuttle Main Engine (SSME). A graphical user interface allows an expert user to intimately interact with the system during diagnosis. The system was applied to data taken during actual SSME tests where data anomalies were observed.

Cost, Thomas L.; Hofmann, Martin O.

1991-01-01

221

Visualizing systems engineering data with Java  

SciTech Connect

Systems Engineers are required to deal with complex sets of data. To be useful, the data must be managed effectively, and presented in meaningful terms to a wide variety of information consumers. Two software patterns are presented as the basis for exploring the visualization of systems engineering data. The Model, View, Controller pattern defines an information management system architecture. The Entity, Relation, Attribute pattern defines the information model. MVC ?Views? then form the basis for the user interface between the information consumer and the MVC ?Controller?/?Model? combination. A Java tool set is described for exploring alternative views into the underlying complex data structures encountered in systems engineering.

Barter, R; Vinzant, A

1998-11-10

222

The interdisciplinary field of Biomedical Engineering combines elements of engineering (electronics, systems analysis, fluid  

E-print Network

32 The interdisciplinary field of Biomedical Engineering combines elements of engineering ) 101 Introduction to Biomedical Engineering (3, Fa) Historical development and survey of major areas comprising biomedical engineering: theoretical neurobiology and systems physiology, biomedical

Rohs, Remo

223

Engine system assessment study using Martian propellants  

NASA Technical Reports Server (NTRS)

A feasibility study was performed that identified and characterized promising chemical propulsion system designs that utilize two or more of the propellant combinations: LOX/H2, LOX/CH4 and LOX/CO. The engine systems examined focused on the usage of common subsystem/component hardware where feasible. From the evaluation baseline employed, tripropellant MTV LOX cooled and bipropellant LEV and MEV engine systems are identified.

Pelaccio, D.; Jacobs, M.; Collins, J.; Scheil, C.; Meyer, M.

1992-01-01

224

Engine system assessment study using Martian propellants  

NASA Astrophysics Data System (ADS)

A feasibility study was performed that identified and characterized promising chemical propulsion system designs that utilize two or more of the propellant combinations: LOX/H2, LOX/CH4 and LOX/CO. The engine systems examined focused on the usage of common subsystem/component hardware where feasible. From the evaluation baseline employed, tripropellant MTV LOX cooled and bipropellant LEV and MEV engine systems are identified.

Pelaccio, D.; Jacobs, M.; Collins, J.; Scheil, C.; Meyer, M.

1992-07-01

225

Congeneration system with a Stirling engine  

SciTech Connect

This patent describes a cogeneration system for producing process heat for useful purposes and electric energy. It comprises an electric generator; a Stirling cycle engine having an output shaft operatively coupled to the generator for driving the generator, the engine including at least one internal fuel combustor; means for circulating a cooling liquid about the generator and engine to extract heat therefrom; an exhaust system coupled with the engine for exhausting combustion gases from the engine, the exhaust system including a condensing heat exchanger for cooling the combustion gases below the condensing, temperature of the water vapor in the exhaust gases; means for directing the cooling liquid around the condensing heat exchanger to extract heat therefrom and heat the liquid; and means for directing the cooling liquid for useful purposes.

Meijer, R.J.; Meijer, E.J.; Godett, T.M.

1991-12-24

226

Heriot-Watt Micro Systems Engineering  

E-print Network

Heriot-Watt Micro Systems Engineering Centre - MISEC KEY BENEFITS: · Clean room facilities in MEMS, MOEMS, sensing and fluidics the MISEC group in Heriot-Watt offers testing and consultancy Engineering Centre (MISEC) at Heriot-Watt University is a multi-disciplinary research team combining a range

Painter, Kevin

227

Egr control system for internal combustion engine  

Microsoft Academic Search

An egr control system for an internal combustion engine, comprises an egr passage connecting between the intake and exhaust passages of the engine and formed with an orifice therein , an egr control valve for controlling the amount of exhaust gas passing through the egr passage, a regulating valve for controlling the operation of the egr control valve, and a

1981-01-01

228

Process Systems Engineering Education: Learning by Research  

ERIC Educational Resources Information Center

In this paper, we discuss our approach in teaching the final-year course Process Systems Engineering. Students are given ownership of the course by transferring to them the responsibility of learning. A project-based group environment stimulates learning while solving a real engineering problem. We discuss postgraduate student involvement and how…

Abbas, A.; Alhammadi, H. Y.; Romagnoli, J. A.

2009-01-01

229

Using ecosystem engineers to restore ecological systems  

E-print Network

Using ecosystem engineers to restore ecological systems James E. Byers1 , Kim Cuddington2 , Clive G of Biological Sciences, Ohio University, Athens, OH 45701, USA 3 Institute of Ecosystem Studies, Millbrook, NY, Duke University, Durham, NC 27708, USA Ecosystem engineers affect other organisms by creating

230

Software-Engineering Data-Base System  

NASA Technical Reports Server (NTRS)

Software Engineering Laboratory Data Base Maintenance System (SEL/DBAM) collects and maintains data base for evaluating software-development methodologies. SEL/DBAM provides interactive facilities for management of data collected by Software Engineering Laboratory at Goddard Space Flight Center.

Card, D. N.

1983-01-01

231

Computer Based Systems Engineering Workshop  

Microsoft Academic Search

Modern computer based systems are complex multi-systems consisting of many connected individual subsystems; each one of them is typically also a multicomputer system. The subsystems in a multi-system can be either geographically distributed or locally connected systems. Typical examples of computer based systems are medical systems, process control systems, communications systems, weapon systems and large information systems.\\u000a The development of

Jonah Z. Lavi; Ashok K. Agrawala; Raymond J. A. Buhr; Ken Jackson; Michael Jackson; Bernard Lang

1991-01-01

232

System safety in Stirling engine development  

NASA Technical Reports Server (NTRS)

The DOE/NASA Stirling Engine Project Office has required that contractors make safety considerations an integral part of all phases of the Stirling engine development program. As an integral part of each engine design subtask, analyses are evolved to determine possible modes of failure. The accepted system safety analysis techniques (Fault Tree, FMEA, Hazards Analysis, etc.) are applied in various degrees of extent at the system, subsystem and component levels. The primary objectives are to identify critical failure areas, to enable removal of susceptibility to such failures or their effects from the system and to minimize risk.

Bankaitis, H.

1981-01-01

233

Hybrid Combustion-Gasification Chemical Looping  

SciTech Connect

For the past several years Alstom Power Inc. (Alstom), a leading world-wide power system manufacturer and supplier, has been in the initial stages of developing an entirely new, ultra-clean, low cost, high efficiency power plant for the global power market. This new power plant concept is based on a hybrid combustion-gasification process utilizing high temperature chemical and thermal looping technology The process consists of the oxidation, reduction, carbonation, and calcination of calcium-based compounds, which chemically react with coal, biomass, or opportunity fuels in two chemical loops and one thermal loop. The chemical and thermal looping technology can be alternatively configured as (i) a combustion-based steam power plant with CO{sub 2} capture, (ii) a hybrid combustion-gasification process producing a syngas for gas turbines or fuel cells, or (iii) an integrated hybrid combustion-gasification process producing hydrogen for gas turbines, fuel cells or other hydrogen based applications while also producing a separate stream of CO{sub 2} for use or sequestration. In its most advanced configuration, this new concept offers the promise to become the technology link from today's Rankine cycle steam power plants to tomorrow's advanced energy plants. The objective of this work is to develop and verify the high temperature chemical and thermal looping process concept at a small-scale pilot facility in order to enable AL to design, construct and demonstrate a pre-commercial, prototype version of this advanced system. In support of this objective, Alstom and DOE started a multi-year program, under this contract. Before the contract started, in a preliminary phase (Phase 0) Alstom funded and built the required small-scale pilot facility (Process Development Unit, PDU) at its Power Plant Laboratories in Windsor, Connecticut. Construction was completed in calendar year 2003. The objective for Phase I was to develop the indirect combustion loop with CO{sub 2} separation, and also syngas production from coal with the calcium sulfide (CaS)/calcium sulfate (CaSO{sub 4}) loop utilizing the PDU facility. The results of Phase I were reported in Reference 1, 'Hybrid Combustion-Gasification Chemical Looping Coal Power Development Technology Development Phase I Report' The objective for Phase II was to develop the carbonate loop--lime (CaO)/calcium carbonate (CaCO{sub 3}) loop, integrate it with the gasification loop from Phase I, and ultimately demonstrate the feasibility of hydrogen production from the combined loops. The results of this program were reported in Reference 3, 'Hybrid Combustion-Gasification Chemical Looping Coal Power Development Technology Development Phase II Report'. The objective of Phase III is to operate the pilot plant to obtain enough engineering information to design a prototype of the commercial Chemical Looping concept. The activities include modifications to the Phase II Chemical Looping PDU, solids transportation studies, control and instrumentation studies and additional cold flow modeling. The deliverable is a report making recommendations for preliminary design guidelines for the prototype plant, results from the pilot plant testing and an update of the commercial plant economic estimates.

Herbert Andrus; Gregory Burns; John Chiu; Gregory Lijedahl; Peter Stromberg; Paul Thibeault

2009-01-07

234

System engineering toolbox for design-oriented engineers  

NASA Technical Reports Server (NTRS)

This system engineering toolbox is designed to provide tools and methodologies to the design-oriented systems engineer. A tool is defined as a set of procedures to accomplish a specific function. A methodology is defined as a collection of tools, rules, and postulates to accomplish a purpose. For each concept addressed in the toolbox, the following information is provided: (1) description, (2) application, (3) procedures, (4) examples, if practical, (5) advantages, (6) limitations, and (7) bibliography and/or references. The scope of the document includes concept development tools, system safety and reliability tools, design-related analytical tools, graphical data interpretation tools, a brief description of common statistical tools and methodologies, so-called total quality management tools, and trend analysis tools. Both relationship to project phase and primary functional usage of the tools are also delineated. The toolbox also includes a case study for illustrative purposes. Fifty-five tools are delineated in the text.

Goldberg, B. E.; Everhart, K.; Stevens, R.; Babbitt, N., III; Clemens, P.; Stout, L.

1994-01-01

235

A systems engineering primer for every engineer and scientist  

SciTech Connect

The Systems Engineering (SE) staff at LBNL has generated the following artifacts to assist projects with implementing a systems approach: (1) The present document that focuses on the what, why, and when of SE. It also provides a simple case-study to illustrate several SE tasks. (2) A web site with primary emphasis on the project life-cycle and workflow, (http://www-eng.LBNL.gov/Systems/index.html). It includes: SE guidelines and principles; A list of in-house tools; Templates; Case studies with ''how to'' examples; and Links to useful SE material. These sources are living documents to be updated as necessary. The viewpoint adopted in this document is that what LBNL engineers and scientists need is a set of principles and guiding practices for developing R and D systems rather than a ''cookbook''. There are many excellent ''how to'' resources such as the ''INCOSE Systems Engineering Handbook'' to guide those in search of more details. The SE staff is another resource available to consult and support projects. This document specifies SE principles and activities that are applicable to all LBNL projects independent of their specific differences. Each project should tailor the SE implementation to meet its individual needs and culture including project-specific resources, procedures, products, and tools.

Edwards, William R.

2001-12-10

236

Modeling Engineering Systems with Geometry  

Microsoft Academic Search

The theory of connection has been used to solve many problems in engineering. economics, and in management; in this paper, firstly, the theory of connection is introduced. Secondly, a new toolbox of functions for modeling and simulation is presented. Thirdly, the theory is used to solve a planning and scheduling problem with the help of the toolbox of functions. The

Reggie Davidrajuh

2009-01-01

237

Project Management vs. Systems Engineering Management: A Practitioners' View on  

E-print Network

Project Management vs. Systems Engineering Management: A Practitioners' View on IntegratingPROJECT MANAGEMENT VS. SYSTEMS ENGINEERING MANAGEMENT Received 3 August 2010; Revised 18 December 2010 as technical planning, management, and leadership activities [Frank, 2000]. Systems engineering managers must

de Weck, Olivier L.

238

46 CFR 126.470 - Marine-engineering systems.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Marine-engineering systems. 126.470 Section 126...Certification § 126.470 Marine-engineering systems. The inspection procedures for marine-engineering systems contained in subchapter F...

2012-10-01

239

46 CFR 126.470 - Marine-engineering systems.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 false Marine-engineering systems. 126.470 Section 126...Certification § 126.470 Marine-engineering systems. The inspection procedures for marine-engineering systems contained in subchapter F...

2013-10-01

240

A Systems-Level Perspective on Engine Ice Accretion  

NASA Technical Reports Server (NTRS)

Talk covers: (1) Problem of Engine Power Loss;(2) Modeling Engine Icing Effects; (3) Simulation of Engine Rollback; (4) Icing/Engine Control System Interaction; (5) Detection of Ice Accretion; (6) Potential Mitigation Strategies.

May, Ryan David; Guo, Ten-Huei; Simon, Donald L.

2012-01-01

241

40 CFR 91.307 - Engine cooling system.  

Code of Federal Regulations, 2010 CFR

An engine cooling system is required with sufficient capacity to maintain the engine at normal operating temperatures as prescribed by the engine manufacturer. Auxiliary fan(s) may be used to maintain sufficient engine cooling during dynamometer...

2010-07-01

242

Development of an Integrated Multi-Contaminant Removal Process Applied to Warm Syngas Cleanup for Coal-Based Advanced Gasification Systems  

SciTech Connect

This project met the objective to further the development of an integrated multi-contaminant removal process in which H2S, NH3, HCl and heavy metals including Hg, As, Se and Cd present in the coal-derived syngas can be removed to specified levels in a single/integrated process step. The process supports the mission and goals of the Department of Energyâ??s Gasification Technologies Program, namely to enhance the performance of gasification systems, thus enabling U.S. industry to improve the competitiveness of gasification-based processes. The gasification program will reduce equipment costs, improve process environmental performance, and increase process reliability and flexibility. Two sulfur conversion concepts were tested in the laboratory under this project, i.e., the solventbased, high-pressure University of California Sulfur Recovery Process â?? High Pressure (UCSRP-HP) and the catalytic-based, direct oxidation (DO) section of the CrystaSulf-DO process. Each process required a polishing unit to meet the ultra-clean sulfur content goals of <50 ppbv (parts per billion by volume) as may be necessary for fuel cells or chemical production applications. UCSRP-HP was also tested for the removal of trace, non-sulfur contaminants, including ammonia, hydrogen chloride, and heavy metals. A bench-scale unit was commissioned and limited testing was performed with simulated syngas. Aspen-Plus®-based computer simulation models were prepared and the economics of the UCSRP-HP and CrystaSulf-DO processes were evaluated for a nominal 500 MWe, coal-based, IGCC power plant with carbon capture. This report covers the progress on the UCSRP-HP technology development and the CrystaSulf-DO technology.

Howard Meyer

2010-11-30

243

AAHM 2012: Systems Engineer Leading the Way  

NASA Video Gallery

Marco Midon, who is visually impaired, is highlighted for NASA's Black History Month. He is the Lead Systems Engineer who oversees the design and implementation of NASA ground stations in the area ...

244

Gasification of rice straw in a fluidized-bed gasifier for syngas application in close-coupled boiler-gasifier systems.  

PubMed

The feasibility and operation performance of the gasification of rice straw in an atmospheric fluidized-bed gasifier was studied. The gasification was carried out between 700 and 850 °C. The stoichiometric air-fuel ratio (A/F) for rice straw was 4.28 and air supplied was 7-25% of that necessary for stoichiometric combustion. Mass and power balances, tar concentration, produced gas composition, gas phase ammonia, chloride and potassium concentrations, agglomeration tendencies and gas efficiencies were assessed. Agglomeration was avoided by replacing the normal alumina-silicate bed by a mixture of alumina-silicate sand and MgO. It was shown that it is possible to produce high quality syngas from the gasification of rice straw. Under the experimental conditions used, the higher heating value (HHV) of the produced gas reached 5.1 MJ Nm(-3), the hot gas efficiency 61% and the cold gas efficiency 52%. The obtained results prove that rice straw may be used as fuel for close-coupled boiler-gasifier systems. PMID:22297044

Calvo, L F; Gil, M V; Otero, M; Morán, A; García, A I

2012-04-01

245

Complexity and Emergence in Engineering Systems  

Microsoft Academic Search

The purpose of this chapter is to introduce the reader to the key concepts of complexity and emergence, and to give an overview\\u000a of the state of the art techniques used to study and engineer systems to exhibit particular emergent properties. We include\\u000a theories both from complex systems engineering and from the physical sciences. Unlike most reviews, which usually focus

Chih-chun Chen; Sylvia B. Nagl; Christopher D. Clack

2009-01-01

246

Stirling cycle engine and refrigeration systems  

NASA Technical Reports Server (NTRS)

A Stirling cycle heat engine is disclosed in which displacer motion is controlled as a function of the working fluid pressure P sub 1 and a substantially constant pressure P sub 0. The heat engine includes an auxiliary chamber at the constant pressure P sub 0. An end surface of a displacer piston is disposed in the auxiliary chamber. During the compression portion of the engine cycle when P sub 1 rises above P sub 0 the displacer forces the working fluid to pass from the cold chamber to the hot chamber of the engine. During the expansion portion of the engine cycle the heated working fluid in the hot chamber does work by pushing down on the engine's drive piston. As the working fluid pressure P sub 1 drops below P sub 0 the displacer forces most of the working fluid in the hot chamber to pass through the regenerator to the cold chamber. The engine is easily combinable with a refrigeration section to provide a refrigeration system in which the engine's single drive piston serves both the engine and the refrigeration section.

Higa, W. H. (inventor)

1976-01-01

247

Complex Adaptive Systems of Systems (CASOS) engineering environment.  

SciTech Connect

Complex Adaptive Systems of Systems, or CASoS, are vastly complex physical-socio-technical systems which we must understand to design a secure future for the nation. The Phoenix initiative implements CASoS Engineering principles combining the bottom up Complex Systems and Complex Adaptive Systems view with the top down Systems Engineering and System-of-Systems view. CASoS Engineering theory and practice must be conducted together to develop a discipline that is grounded in reality, extends our understanding of how CASoS behave and allows us to better control the outcomes. The pull of applications (real world problems) is critical to this effort, as is the articulation of a CASoS Engineering Framework that grounds an engineering approach in the theory of complex adaptive systems of systems. Successful application of the CASoS Engineering Framework requires modeling, simulation and analysis (MS and A) capabilities and the cultivation of a CASoS Engineering Community of Practice through knowledge sharing and facilitation. The CASoS Engineering Environment, itself a complex adaptive system of systems, constitutes the two platforms that provide these capabilities.

Detry, Richard Joseph; Linebarger, John Michael; Finley, Patrick D.; Maffitt, S. Louise; Glass, Robert John, Jr.; Beyeler, Walter Eugene; Ames, Arlo Leroy

2012-02-01

248

Intelligent Engine Systems: Adaptive Control  

NASA Technical Reports Server (NTRS)

We have studied the application of the baseline Model Predictive Control (MPC) algorithm to the control of main fuel flow rate (WF36), variable bleed valve (AE24) and variable stator vane (STP25) control of a simulated high-bypass turbofan engine. Using reference trajectories for thrust and turbine inlet temperature (T41) generated by a simulated new engine, we have examined MPC for tracking these two reference outputs while controlling a deteriorated engine. We have examined the results of MPC control for six different transients: two idle-to-takeoff transients at sea level static (SLS) conditions, one takeoff-to-idle transient at SLS, a Bode power command and reverse Bode power command at 20,000 ft/Mach 0.5, and a reverse Bode transient at 35,000 ft/Mach 0.84. For all cases, our primary focus was on the computational effort required by MPC for varying MPC update rates, control horizons, and prediction horizons. We have also considered the effects of these MPC parameters on the performance of the control, with special emphasis on the thrust tracking error, the peak T41, and the sizes of violations of the constraints on the problem, primarily the booster stall margin limit, which for most cases is the lone constraint that is violated with any frequency.

Gibson, Nathan

2008-01-01

249

Engineering management of large scale systems  

NASA Technical Reports Server (NTRS)

The organization of high technology and engineering problem solving, has given rise to an emerging concept. Reasoning principles for integrating traditional engineering problem solving with system theory, management sciences, behavioral decision theory, and planning and design approaches can be incorporated into a methodological approach to solving problems with a long range perspective. Long range planning has a great potential to improve productivity by using a systematic and organized approach. Thus, efficiency and cost effectiveness are the driving forces in promoting the organization of engineering problems. Aspects of systems engineering that provide an understanding of management of large scale systems are broadly covered here. Due to the focus and application of research, other significant factors (e.g., human behavior, decision making, etc.) are not emphasized but are considered.

Sanders, Serita; Gill, Tepper L.; Paul, Arthur S.

1989-01-01

250

EE 337 Engineering nano-systems EE 337 Engineering micro and nano-systems  

E-print Network

EE 337 Engineering nano-systems Page 1 EE 337 Engineering micro and nano-systems A.F.J. Levi Spring.edu/dept/engineering/eleceng/Adv_Network_Tech/Html/ee337.html This course is designed as an introduction to nano-technology, methods to control and exploit the new degrees of freedom delivered by nano-science, and the integration of nano-technology into systems

Levi, Anthony F. J.

251

COSYSMO: A Constructive Systems Engineering Cost Model Coming of Age  

Microsoft Academic Search

Building on the synergy between Systems Engineering and Software Engineering, the Center for Software Engineering (CSE) at the University of Southern California (USC), has initiated an effort to develop a parametric model to estimate Systems Engineering costs. The goal of this model, called COSYSMO (Constructive Systems Engineering Cost Model), is to more accurately estimate the time and effort associated with

Ricardo Valerdi; Barry W. Boehm; Donald J. Reifer

2003-01-01

252

EE 238 Engineering nano-systems EE 238 Engineering nano-systems  

E-print Network

EE 238 Engineering nano-systems Page 1 EE 238 Engineering nano-systems A.F.J. Levi Spring 2009, OHE This course is designed as an introduction to nano-technology, methods to control and exploit the new degrees of freedom delivered by nano-science, and the integration of nano-technology into systems. It is a hands

Levi, Anthony F. J.

253

EE 337 Engineering micro and nano-systems EE 337 Engineering micro and nano-systems  

E-print Network

EE 337 Engineering micro and nano-systems EE 337 Engineering micro and nano-systems A.F.J. Levi as an introduction to micro and nano-technology, methods to control and exploit the new degrees of freedom delivered by nano-science, and the integration of micro and nano-technology into systems. It is a hands

Levi, Anthony F. J.

254

EGR control system for diesel engine  

SciTech Connect

In an EGR control system for a diesel engine, the EGR amount is controlled by controlling the pressure in a diaphragm chamber of an EGR valve using the output signal of a computer, responsive to signals from a plurality of engine running condition sensors, for calculating the EGR amount wich corrections according to the engine running conditions and the excess air rate. In some cases, the EGR is carried out only when the rotational speed of the engine is higher than a predetermined rotational speed. Also, some cases, the EGR is carried out when an occurence of idling is detected, even if the rotational speed of the engine is lower than the predetermined rotational speed.

Sekiguehi, K.; Igashira, T.; Kawai, H.; Tanaka, T.

1984-05-29

255

Generative engineering databases - Toward expert systems  

NASA Technical Reports Server (NTRS)

Engineering data management, incorporating concepts of optimization with data representation, is receiving increasing attention as the amount and complexity of information necessary for performing engineering operations increases and the need to coordinate its representation and use increases. Research in this area promises advantages for a wide variety of engineering applications, particularly those which seek to use data in innovative ways in the engineering process. This paper presents a framework for a comprehensive, relational database management system that combines a knowledge base of design constraints with a database of engineering data items in order to achieve a 'generative database' - one which automatically generates new engineering design data according to the design constraints stored in the knowledge base. The representation requires a database that is able to store all of the data normally associated with engineering design and to accurately represent the interactions between constraints and the stored data while guaranteeing its integrity. The representation also requires a knowledge base that is able to store all the constraints imposed upon the engineering design process.

Rasdorf, W. J.; Salley, G. C.

1985-01-01

256

Acoustic Velocity and Attenuation Measurements in Thin Rods with Application to Temperature Profiling in Coal Gasification Systems  

Microsoft Academic Search

This paper is concerned with the application of ultrasonic thermometry for temperature profiling in the reactors of coal gasification plants. A temperature profiling sensor typically uses a thin rod with several notches to segregate the sensor length into various zones. An acoustic pulse transmitted through the multizone sensor is partially reflected back at each notch, and measurement of the time

N. Gopalsami; A. C. Raptis

1984-01-01

257

Coal gasification vessel  

DOEpatents

A vessel system (10) comprises an outer shell (14) of carbon fibers held in a binder, a coolant circulation mechanism (16) and control mechanism (42) and an inner shell (46) comprised of a refractory material and is of light weight and capable of withstanding the extreme temperature and pressure environment of, for example, a coal gasification process. The control mechanism (42) can be computer controlled and can be used to monitor and modulate the coolant which is provided through the circulation mechanism (16) for cooling and protecting the carbon fiber and outer shell (14). The control mechanism (42) is also used to locate any isolated hot spots which may occur through the local disintegration of the inner refractory shell (46).

Loo, Billy W. (Oakland, CA)

1982-01-01

258

Gasification: A Cornerstone Technology  

ScienceCinema

NETL is a leader in the science and technology of gasification - a process for the conversion of carbon-based materials such as coal into synthesis gas (syngas) that can be used to produce clean electrical energy, transportation fuels, and chemicals efficiently and cost-effectively using domestic fuel resources. Gasification is a cornerstone technology of 21st century zero emissions powerplants

Gary Stiegel

2010-01-08

259

Pulverized coal plasma gasification  

Microsoft Academic Search

A number of experiments on the plasma-vapor gasification of brown coals of three types have been carried out using an experimental plant with an electric-arc reactor of the combined type. On the basis of the material and heat balances, process parameters have been obtained: the degree of carbon gasification (?c), the level of sulfur conversion into the gas phase (?s),

R. A. Kalinenko; A. P. Kuznetsov; A. A. Levitsky; V. E. Messerle; Yu. A. Mirokhin; L. S. Polak; Z. B. Sakipov; A. B. Ustimenko

1993-01-01

260

Plasma gasification of coals  

SciTech Connect

To avoid problems of transporting coal from Siberia to the European part of the Soviet Union, plasma gasification could be used to give methane and liquid methyl fuel which could be transported by pipeline. Plasma-assisted gasification is particularly effective in the case of brown coals. (11 refs.)

Kruzhilin, G.I.; Khudyakov, G.N.; Tselishchev, P.A.

1981-01-01

261

Systems Engineering Graduate Certificate Program About the Program  

E-print Network

Certificate Program will provide practicing engineers and scientists (from a variety of disciplinary, verification, and validation human systems engineering methods for functional analysis and allocation for prerequisites or interest): MTHSC 634: Advanced Engineering Mathematics MTHSC 805: Data Analysis Systems

Hallstrom, Jason

262

Egr control system for internal combustion engine  

SciTech Connect

An egr control system for an internal combustion engine, comprises an egr passage connecting between the intake and exhaust passages of the engine and formed with an orifice therein , an egr control valve for controlling the amount of exhaust gas passing through the egr passage, a regulating valve for controlling the operation of the egr control valve, and a device, for changing a preset condition of the regulating valve in accordance with engine operating conditions, so that ege rate can be controlled to desirable values from view points of driveability and fuel economy.

Okamura, K.

1981-01-20

263

Deep Space Telecommunications Systems Engineering  

NASA Technical Reports Server (NTRS)

Descriptive and analytical information useful for the optimal design, specification, and performance evaluation of deep space telecommunications systems is presented. Telemetry, tracking, and command systems, receiver design, spacecraft antennas, frequency selection, interference, and modulation techniques are addressed.

Yuen, J. H. (editor)

1982-01-01

264

The Art of War : system of systems engineering perspectives  

Microsoft Academic Search

Purpose – The purpose of this paper is to explore the ancient, 2,500 years old The Art of War by Sun Tzu from a system of systems engineering perspectives. The aim is to show that even for an emerging discipline in engineering the underlying concepts may be much more deeply rooted. Design\\/methodology\\/approach – The author approaches the subject by an

Check Teck Foo

2008-01-01

265

Engineered containment and control systems : nurturing nature.  

SciTech Connect

The development of engineered containment and control systems for contaminated sites must consider the environmental setting of each site. The behaviors of both contaminated materials and engineered systems are affected by environmental conditions that will continue to evolve over time as a result of such natural processes as climate change, ecological succession, pedogenesis, and landform changes. Understanding these processes is crucial to designing, implementing, and maintaining effective systems for sustained health and environmental protection. Traditional engineered systems such as landfill liners and caps are designed to resist natural processes rather than working with them. These systems cannot be expected to provide long-term isolation without continued maintenance. In some cases, full-scale replacement and remediation may be required within 50 years, at an effort and cost much higher than for the original cleanup. Approaches are being developed to define smarter containment and control systems for stewardship sites, considering lessons learned from implementing prescriptive waste disposal regulations enacted since the 1970s. These approaches more effectively involve integrating natural and engineered systems; enhancing sensors and predictive tools for evaluating performance; and incorporating information on failure events, including precursors and consequences, into system design and maintenance. An important feature is using natural analogs to predict environmental conditions and system responses over the long term, to accommodate environmental change in the design process, and, as possible, to engineer containment systems that mimic favorable natural systems. The key emphasis is harmony with the environment, so systems will work with and rely on natural processes rather than resisting them. Implementing these new integrated systems will reduce current requirements for active management, which are resource-intensive and expensive.

MacDonell, M.; Clarke, J.; Smith, E.; Dunn, J.; Waugh, J.; Environmental Assessment; Vanderbilt Univ.; ORNL; Kleinfelder; U.S. Department of Energy Grand Junction Office

2004-06-01

266

ENGINEERING SYSTEMS THE FUTURE OF ENGINEERING SYSTEMS: DEVELOPMENT OF  

E-print Network

attacks of 9/11 showed clearly how some of the critical infrastructures in the US are connected to each after the fact. The budgeting for these systems is largely an art, and thus many of these large complex

de Weck, Olivier L.

267

Bylands: reverse engineering safety-critical systems  

Microsoft Academic Search

We address two problems concerned with the maintenance of safety-critical software. Firstly, we analyse the new issues required for the reverse engineering of real-time existing code to extract high level designs. Secondly, we present a possible design abstraction mechanism that can be used for safety-critical software. We use formal transformations both in the reverse engineering of systems involving temporal constraints,

T. M. Bull; E. J. Younger; Keith H. Bennett; Z. Luo

1995-01-01

268

ASPEN simulation of a fixed-bed integrated gasification combined-cycle power plant  

Microsoft Academic Search

A fixed-bed integrated gasification combined-cycle (IGCC) power plant has been modeled using the Advanced System for Process ENgineering (ASPEN). The ASPEN simulation is based on a conceptual design of a 509-MW IGCC power plant that uses British Gas Corporation (BGC)\\/Lurgi slagging gasifiers and the Lurgi acid gas removal process. The 39.3-percent thermal efficiency of the plant that was calculated by

1986-01-01

269

EE 337 Engineering micro and nano-systems EE 337 Engineering micro and nano-systems  

E-print Network

EE 337 Engineering micro and nano-systems Page 1 EE 337 Engineering micro and nano-systems A.edu/dept/engineering/eleceng/Adv_Network_Tech/Html/ee337.html This course is designed as an introduction to micro and nano-technology, methods to control and exploit the new degrees of freedom delivered by nano-science, and the integration of micro and nano

Levi, Anthony F. J.

270

Helping System Engineers Bridge the Peaks  

NASA Technical Reports Server (NTRS)

In our experience at NASA, system engineers generally follow the Twin Peaks approach when developing safety-critical systems. However, iterations between the peaks require considerable manual, and in some cases duplicate, effort. A significant part of the manual effort stems from the fact that requirements are written in English natural language rather than a formal notation. In this work, we propose an approach that enables system engineers to leverage formal requirements and automated test generation to streamline iterations, effectively "bridging the peaks". The key to the approach is a formal language notation that a) system engineers are comfortable with, b) is supported by a family of automated V&V tools, and c) is semantically rich enough to describe the requirements of interest. We believe the combination of formalizing requirements and providing tool support to automate the iterations will lead to a more efficient Twin Peaks implementation at NASA.

Rungta, Neha; Tkachuk, Oksana; Person, Suzette; Biatek, Jason; Whalen, Michael W.; Castle, Joseph; Castle, JosephGundy-Burlet, Karen

2014-01-01

271

User engineering: A new look at system engineering  

NASA Astrophysics Data System (ADS)

User Engineering is a new System Engineering perspective responsible for defining and maintaining the user view of the system. Its elements are a process to guide the project and customer, a multidisciplinary team including hard and soft sciences, rapid prototyping tools to build user interfaces quickly and modify them frequently at low cost, and a prototyping center for involving users and designers in an iterative way. The main consideration is reducing the risk that the end user will not or cannot effectively use the system. The process begins with user analysis to produce cognitive and work style models, and task analysis to produce user work functions and scenarios. These become major drivers of the human computer interface design which is presented and reviewed as an interactive prototype by users. Feedback is rapid and productive, and user effectiveness can be measured and observed before the system is built and fielded. Requirements are derived via the prototype and baselined early to serve as an input to the architecture and software design.

McLaughlin, Larry L.

1987-10-01

272

User engineering: A new look at system engineering  

NASA Technical Reports Server (NTRS)

User Engineering is a new System Engineering perspective responsible for defining and maintaining the user view of the system. Its elements are a process to guide the project and customer, a multidisciplinary team including hard and soft sciences, rapid prototyping tools to build user interfaces quickly and modify them frequently at low cost, and a prototyping center for involving users and designers in an iterative way. The main consideration is reducing the risk that the end user will not or cannot effectively use the system. The process begins with user analysis to produce cognitive and work style models, and task analysis to produce user work functions and scenarios. These become major drivers of the human computer interface design which is presented and reviewed as an interactive prototype by users. Feedback is rapid and productive, and user effectiveness can be measured and observed before the system is built and fielded. Requirements are derived via the prototype and baselined early to serve as an input to the architecture and software design.

Mclaughlin, Larry L.

1987-01-01

273

ANG coal gasification project management control system report. [Great Plains project  

SciTech Connect

Much time, money and effort has been spent in the forefront of this project for project controls. The work breakdown structure for the systems has been custom designed. The systems, both manual and computerized, have been well scrutinized and chosen by ANG to represent the most cost effective and efficient way of controlling a project the magnitude of $1.5 billion. These systems have been developed in a manner so that information can be gathered as detailed or as summarized as necessary, and in the most timely and expeditious ways.

Not Available

1981-01-01

274

Prospects for the Gasification of Refuse-Derived Fuel (RDF)  

E-print Network

PROSPECTS FOR THE GASIFICATION OF REFUSE-DERIVED FUEL (RDF) Kenneth L. Woodruff Banyan Technology Corporation Dallas, Texas Robin F.W. Guard Omnifuel Gasification Systems, Ltd. Toronto, Ontario ABSTRACT Fluidized-bed gasification... from the primary disc screen under size fraction. The remaining shredded, non-magnetic fraction, consisting primarily of combustible mate rials is presently landfilled, but will be further processed to produce RDF acceptable for use in the Omnifuel...

Woodruff, K. L.; Guard, R. F. W.

1983-01-01

275

Engineering the System and Technical Integration  

NASA Technical Reports Server (NTRS)

Approximately 80% of the problems encountered in aerospace systems have been due to a breakdown in technical integration and/or systems engineering. One of the major challenges we face in designing, building, and operating space systems is: how is adequate integration achieved for the systems various functions, parts, and infrastructure? This Contractor Report (CR) deals with part of the problem of how we engineer the total system in order to achieve the best balanced design. We will discuss a key aspect of this question - the principle of Technical Integration and its components, along with management and decision making. The CR will first provide an introduction with a discussion of the Challenges in Space System Design and meeting the challenges. Next is an overview of Engineering the System including Technical Integration. Engineering the System is expanded to include key aspects of the Design Process, Lifecycle Considerations, etc. The basic information and figures used in this CR were presented in a NASA training program for Program and Project Managers Development (PPMD) in classes at Georgia Tech and at Marshall Space Flight Center (MSFC). Many of the principles and illustrations are extracted from the courses we teach for MSFC.

Blair, J. C.; Ryan, R. S.; Schutzenhofer, L. A.

2011-01-01

276

Exhaust gas recirculation system for diesel engine  

Microsoft Academic Search

An exhaust gas recirculation control system calculates a target EGR ratio value based upon engine operating parameters and maintains the EGR ratio at the target EGR ratio value. Each time the vehicle travels a predetermined distance, the control system calculates an actual EGR ratio value and corrects the target EGR ratio value to reduce a deviation between the target and

K. Masaki; S. Yasuhara

1984-01-01

277

Modular injection systems for miniature engines  

Microsoft Academic Search

Mission requirements for Kinetic Energy Weapons will require miniaturization of current vehicle propulsion systems for future Space Defence Iniative Programs. A modular injection system (MIS) valve is presented which will decrease cost, size and weight of miniaturized storable bipropellant rocket engines and features two poppet-type propellant valve modules pneumatically linked to a pilot solenoid module. A prototype modular injection valve

Mike Cochran

1992-01-01

278

Department of Geomatics Engineering GPS Integrated Systems  

E-print Network

Department of Geomatics Engineering GPS Integrated Systems For Precision Farming By Hazen L. Gehue 20072 #12;THE UNIVERSITY OF CALGARY GPS Integrated Systems for Precision Farming by Hazen L. Gehue #12;iii ABSTRACT The consequences of homogeneous treatments of agricultural fields is investigated

Calgary, University of

279

APPLICATIONS OF EXPERT SYSTEMS IN ENVIRONMENTAL ENGINEERING  

EPA Science Inventory

Expert systems are a promising computer-based approach to helping environmental engineers solve difficult problems. A number of such systems have been developed to date in the areas of hazard assessment, modeling support, process failure diagnosis, and regulatory support. The US ...

280

Systems engineering and analysis. Third edition  

SciTech Connect

The topics presented in this book have been organized into 6 parts and 19 chapters. Part 1 presents an introduction to systems and systems engineering in the context of system science and good engineering practice. Part 2 addresses the system design process as a series of evolutionary steps, progressing from the identification of a need through conceptual design, preliminary design, detail design and development, and test and evaluation. Part 3 derives some of the most useful mathematical models and tools for systems analysis. Emphasis is placed upon the application of modeling and analysis techniques as an integral part of the systems engineering process. Part 4 addresses design for operational feasibility by discussing those characteristics of design found to be most significant for successful system operation and customer satisfaction. Separate chapters are devoted to reliability, maintainability, usability (human factors), supportability (serviceability), producibility, disposability, and affordability (life-cycle cost). Part 5 presents an overview of systems engineering management, with planning and organization discussed in one chapter and program management and control in another. Part 6 contains a set of comprehensive appendices providing supporting topics, checklists, tables, references, and related resource materials.

Blanchard, B.S.; Fabrycky, W.J. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)

1998-12-01

281

A Retrieval System for Engineering Drawings.  

ERIC Educational Resources Information Center

Describes the problems encountered in the design and implementation of a complete, computerized retrieval system for the engineering and architectural drawings of several large Southern California land development firms: developing a specialized cataloging system and format, a customized thesaurus, computer software, and managerial procedures. The…

Tenopir, Carol; Cibbarelli, Pamela

1979-01-01

282

WABASH RIVER COAL GASIFICATION REPOWERING PROJECT  

SciTech Connect

The close of 1999 marked the completion of the Demonstration Period of the Wabash River Coal Gasification Repowering Project. This Final Report summarizes the engineering and construction phases and details the learning experiences from the first four years of commercial operation that made up the Demonstration Period under Department of Energy (DOE) Cooperative Agreement DE-FC21-92MC29310. This 262 MWe project is a joint venture of Global Energy Inc. (Global acquired Destec Energy's gasification assets from Dynegy in 1999) and PSI Energy, a part of Cinergy Corp. The Joint Venture was formed to participate in the Department of Energy's Clean Coal Technology (CCT) program and to demonstrate coal gasification repowering of an existing generating unit impacted by the Clean Air Act Amendments. The participants jointly developed, separately designed, constructed, own, and are now operating an integrated coal gasification combined-cycle power plant, using Global Energy's E-Gas{trademark} technology (E-Gas{trademark} is the name given to the former Destec technology developed by Dow, Destec, and Dynegy). The E-Gas{trademark} process is integrated with a new General Electric 7FA combustion turbine generator and a heat recovery steam generator in the repowering of a 1950's-vintage Westinghouse steam turbine generator using some pre-existing coal handling facilities, interconnections, and other auxiliaries. The gasification facility utilizes local high sulfur coals (up to 5.9% sulfur) and produces synthetic gas (syngas), sulfur and slag by-products. The Project has the distinction of being the largest single train coal gasification combined-cycle plant in the Western Hemisphere and is the cleanest coal-fired plant of any type in the world. The Project was the first of the CCT integrated gasification combined-cycle (IGCC) projects to achieve commercial operation.

Unknown

2000-09-01

283

Risk and Criticality Systems Engineering  

E-print Network

system, and how risk is incorporated into the development of critical systems. Construct a fault tree Find critical fault #12;13 Probabilistic Risk Analysis Computes risk exposure for various scenarios Do risks in a software project. Perform probabilistic risk analysis Explain what is meant by a critical

Bryson, Joanna J.

284

Systems Engineering Advancement Research Initiative  

E-print Network

to be capable of what I refer to as "situational leadership" ­ that is, having the ability to think and act portfolio. A Message from Leadership The shortfall in SE education and staffing was the subject considered this shortfall with regard to highly complex situations introduced by system of systems (So

de Weck, Olivier L.

285

ASPEN. Advanced System for Process Engineering  

SciTech Connect

ASPEN (Advanced System for Process Engineering) is a state of the art process simulator and economic evaluation package which was designed for use in engineering fossil energy conversion processes. ASPEN can represent multiphase streams including solids, and handle complex substances such as coal. The system can perform steady state material and energy balances, determine equipment size and cost, and carry out preliminary economic evaluations. It is supported by a comprehensive physical property system for computation of major properties such as enthalpy, entropy, free energy, molar volume, equilibrium ratio, fugacity coefficient, viscosity, thermal conductivity, and diffusion coefficient for specified phase conditions; vapor, liquid, or solid. The properties may be computed for pure components, mixtures, or components in a mixture, as appropriate. The ASPEN Input Language is oriented towards process engineers.

Bajura, R.A. [USDOE Morgantown Energy Technology Center, WV (United States)

1985-10-01

286

An inference engine for embedded diagnostic systems  

NASA Technical Reports Server (NTRS)

The implementation of an inference engine for embedded diagnostic systems is described. The system consists of two distinct parts. The first is an off-line compiler which accepts a propositional logical statement of the relationship between facts and conclusions and produces data structures required by the on-line inference engine. The second part consists of the inference engine and interface routines which accept assertions of fact and return the conclusions which necessarily follow. Given a set of assertions, it will generate exactly the conclusions which logically follow. At the same time, it will detect any inconsistencies which may propagate from an inconsistent set of assertions or a poorly formulated set of rules. The memory requirements are fixed and the worst case execution times are bounded at compile time. The data structures and inference algorithms are very simple and well understood. The data structures and algorithms are described in detail. The system has been implemented on Lisp, Pascal, and Modula-2.

Fox, Barry R.; Brewster, Larry T.

1987-01-01

287

Trace metal transformations in gasification  

SciTech Connect

The Energy & Environmental Research Center (EERC) is carrying out an investigation that will provide methods to predict the fate of selected trace elements in integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) systems to aid in the development of methods to control the emission of trace elements determined to be air toxics. The goal of this project is to identify the effects of critical chemical and physical transformations associated with trace element behavior in IGCC and IGFC systems. The trace elements included in this project are arsenic, chromium, cadmium, mercury, nickel, selenium, and lead. The research seeks to identify and fill, experimentally and/or theoretically, data gaps that currently exist on the fate and composition of trace elements. The specific objectives are to (1) review the existing literature to identify the type and quantity of trace elements from coal gasification systems, (2) perform laboratory-scale experimentation and computer modeling to enable prediction of trace element emissions, and (3) identify methods to control trace element emissions.

Benson, S.; Erickson, T.A.; Zygarlicke, C.J. [and others

1995-12-01

288

Trace metal transformation in gasification  

SciTech Connect

The Energy & Environmental Research Center (EERC) is carrying out an investigation that will provide methods to predict the fate of selected trace elements in integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) systems to aid in the development of methods to control the emission of trace elements determined to be air toxics. The goal of this project is to identify the effects of critical chemical and physical transformations associated with trace element behavior in IGCC and IGFC systems. The trace elements included in this project are arsenic, chromium, cadmium, mercury, nickel, selenium, and lead. The research seeks to identify and fill, experimentally and/or theoretically, data gaps that currently exist on the fate and composition of trace elements. The specific objectives are to 1) review the existing literature to identify the type and quantity of trace elements from coal gasification systems, 2) perform laboratory-scale experimentation and computer modeling to enable prediction of trace element emissions, and 3) identify methods to control trace element emissions.

Benson, S.A.; Erickson, T.A.; Zygarlicke, C.J.; O`Keefe, C.A.; Katrinak, K.A.; Allen, S.E.; Hassett, D.J.; Hauserman, W.B. [North Dakota Univ., Grand Forks, ND (United States). Energy and Environmental Research Center; Holcombe, N.T. [USDOE Morgantown Energy Technology Center, WV (United States)

1996-12-31

289

Trace metal transformations in gasification  

SciTech Connect

The Energy and Environmental Research Center (EERC) is carrying out an investigation that will provide methods to predict the fate of selected trace elements in integrated gasification combined cycle (IGCC) and integrated gasification fuel cell (IGFC) systems to aid in the development of methods to control the emission of trace elements determined to be air toxics. The goal of this project is to identify the effects of critical chemical and physical transformations associated with trace element behavior in IGCC and IGFC systems. The trace elements included in this project are arsenic, chromium, cadmium, mercury, nickel, selenium, and lead. The research seeks to identify and fill, experimentally and/or theoretically, data gaps that currently exist on the fate and composition of trace elements. The specific objectives are to (1) review the existing literature to identify the type and quantity of trace elements from coal gasification systems; (2) perform laboratory-scale experimentation and computer modeling to enable prediction of trace element emissions; and (3) identify methods to control trace element emissions. Results are presented and discussed on the partitioning of trace metals and the model design for predicting trace metals behavior.

Benson, S.A.; Erickson, T.A.; O`Keefe, C.A.; Katrinak, K.; Allan, S.E.; Hassett, D.J.; Hauserman, W.B.; Zygarlicke, C.J.

1995-11-01

290

Lean Enablers for Systems Engineering  

E-print Network

Electronic Systems Sikorsky Aircraft MIT* OC-ALC OO-ALC WR-ALC AFMC DFAS AEDC ESC ASC AAC AFFTC DCMA SAFAQ Team (all volunteers, working in spare time) Co-chairs identified with asterisk: · Dave Cleotelis

291

System verification and validation: a fundamental systems engineering task  

NASA Astrophysics Data System (ADS)

Systems Engineering (SE) is the discipline in a project management team, which transfers the user's operational needs and justifications for an Extremely Large Telescope (ELT) -or any other telescope-- into a set of validated required system performance characteristics. Subsequently transferring these validated required system performance characteris-tics into a validated system configuration, and eventually into the assembled, integrated telescope system with verified performance characteristics and provided it with "objective evidence that the particular requirements for the specified intended use are fulfilled". The latter is the ISO Standard 8402 definition for "Validation". This presentation describes the verification and validation processes of an ELT Project and outlines the key role System Engineering plays in these processes throughout all project phases. If these processes are implemented correctly into the project execution and are started at the proper time, namely at the very beginning of the project, and if all capabilities of experienced system engineers are used, the project costs and the life-cycle costs of the telescope system can be reduced between 25 and 50 %. The intention of this article is, to motivate and encourage project managers of astronomical telescopes and scientific instruments to involve the entire spectrum of Systems Engineering capabilities performed by trained and experienced SYSTEM engineers for the benefit of the project by explaining them the importance of Systems Engineering in the AIV and validation processes.

Ansorge, Wolfgang R.

2004-09-01

292

Evaluation of the genotoxicity of process stream extracts from a coal gasification system  

SciTech Connect

Extracts of three complex organic environmental mixtures, two from an experimental coal gasifier (a raw gas and a clean gas sample) and one from a coke oven main, were examined for genotoxicity. Three short-term genotoxicity assay systems were used: Ames Salmonella typhimurium reverse mutation assay, Chinese hamster ovary cell/hypoxanthine-guanine phosphoribosyl transferase (CHO/HGPRT) gene locus mutation assay, and the Chinese hamster lung primary culture/sister chromatid exchange (CHL/SCE) assay. Aroclor-1254-induced rat liver homogenate fraction (S-9) was required to observe genotoxicity in both gene locus mutation assays. The relative survival of CHO cells exposed to extracts was highest in cells exposed to clean gas samples, with the raw gas sample being the most cytotoxic either with or without the addition of S-9. All three complex mixtures induced sister chromatid exchanges in primary lung cell cultures without the addition of S-9. The relative genotoxicity ranking of the samples varied between the mammalian and prokaryotic assay systems. Coke oven main extract produced fewer revertants in bacteria than the raw gas sample. However, the coke oven main extract was more genotoxic in the two eukaryotic systems (CHL/SCE and CHO/HGPRT) than was the raw gas sample. The results of all three assays indicate that the cleanup process used in the experimental gasifier was effective in decreasing the genotoxic materials in the process stream. These data also reemphasize the necessity of evaluating genotoxicity of complex mixtures in a variety of short-term systems. 24 references, 3 figures, 2 tables.

Shimizu, R.W.; Benson, J.M.; Li, A.P.; Henderson, R.F.; Brooks, A.L.

1984-01-01

293

Engineering of complex systems: The impact of systems engineering at NASA  

NASA Astrophysics Data System (ADS)

The "true" impact or value of systems engineering to an organization unfortunately appears not to have been well-studied and understood. The principles of systems engineering are highly encouraged by NASA at all levels, and most practitioners, both internal and external to NASA, intuitively "believe" it adds some value to the development of complex systems by producing them faster, better and cheaper. This research, in trying to fill a gap that exists in the systems engineering literature, analyzes data collected within NASA and other sources external to NASA (INCOSE) for comparisons. Analyses involving a number of case studies performed on selected NASA projects are presented to draw attention to the impact systems engineering had or could have had on these projects. This research clearly shows that systems engineering does add value to projects within and outside NASA. The research results further demonstrate that systems engineering has been beneficial not only to NASA but also to organizations within which INCOSE members work. It was determined, however, that systems engineering does not operate in a vacuum and may not always guarantee success through mere application. During this research, it was discovered that the lack of or inadequate application of systems engineering in the development of complex systems may result in cost overruns, poor technical performance, project delays, and in some cases unmitigated risk with disastrous consequences including the loss of life and property. How much is saved (in terms of cost, schedule) or improved (in terms of technical performance) as a result of its implementation may never be known precisely, but by indirectly measuring its value or impact on a project, percentages of project budget spent on systems engineering activities and any schedule reductions or performance enhancements realized could be determined. According to this research, systems engineering is not a waste of time and resources; in most cases, it is likely to produce some positive impact or value in terms of cost, schedule, technical performance, and risk when applied. The stage in a project's life cycle in which systems engineering is introduced may determine the potential value to be realized by the project. The generation of systems engineering documents is not an indicator of proper execution or performance of systems engineering activities. Projects, as this research shows, are selective in documents they generate. Completion or attendance of job-sponsored systems engineering training programs has little or no effect on NASA engineers and their INCOSE counterparts. This research also uncovered some nontechnical (political and cultural preconceptions or alignments) issues that, when not properly addressed, may impact or impede the value derived from systems engineering. This dissertation also examined the satisfaction with the systems engineering process and the willingness of participants from the two groups studied (NASA and INCOSE) to use it on future projects. The approach used in this study may provide a tool for evaluating the benefits or impact of systems engineering on a project. The research also emphasizes the benefits and relationships among systems engineering, cost, technical performance, schedule, and risks in its analysis of selected NASA projects.

Kludze, Ave-Klutse Kodzo Paaku

294

Evaluation of the genotoxicity of process stream extracts from a coal gasification system  

SciTech Connect

Extracts of three complex organic environmental mixtures, two from an experimental coal gasifier (a raw gas and a clean gas sample) and one from a coke oven main, were examined for genotoxicity. Three short-term genotoxicity assay systems were used: Ames Salmonella typhimurium reverse mutation assay, Chinese hamster ovary cell/hypoxanthine-guanine phosphoribosyl transferase (CHO/HGPRT) gene locus mutation assay, and the Chinese hamster lung primary culture/sister chromatid exchange (CHL/SCE) assay. Aroclor-1254-induced rat liver homogenate fraction (S-9) was required to observe genotoxicity in both gene locus mutation assays (CHO/HGPRT and Ames). The relative survival of CHO cells exposed to extracts was highest in cells exposed to clean gas samples, with the raw gas sample being the most cytotoxic either with or without the addition of S-9. All three complex mixtures induced sister chromatid exchanges in primary lung cell cultures without the addition of S-9. The relative genotoxicity ranking of the samples varied between the mammalian and prokaryotic assay systems. The results of all three assays indicate that the cleanup process used in the experimental gasifier was effective in decreasing the genotoxic materials in the process stream. These data also reemphasize the necessity of evaluating genotoxicity of complex mixtures in a variety of short-term systems.

Shimizu, R.W.; Benson, J.M.; Li, A.P.; Henderson, R.F.; Brooks, A.L.

1984-01-01

295

industrial & Systems Engineers Engineer Systems The challenge is in how you can manage complexity to solve your problem.  

E-print Network

industrial & Systems Engineers Engineer Systems The challenge is in how you can manage complexity of Industrial & Systems Engineering http://www.ise.nus.edu.sg/Sye http://www.facebook.com/ise.nus #12;The to solve your problem. Only Systems Engineering tools and techniques can effectively address complexity

Chaudhuri, Sanjay

296

Surface Gasification Materials Program. Semiannual progress report for the period ending March 31, 1984  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. One of the goals of the program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. Another goal is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. Contents of this report include the following: (1) plant materials surveillance tests; (2) slagging gasifier refractories; (3) protective coatings and claddings; (4) ceramic fabrication/application technology; (5) advanced pressure vessel materials technology; (6) electroslag component casting; (7) production and evaluation of electroslag castings; (8) cost reduction of the electroslag casting manufacturing process; (9) quantitative microstructural characterization of steel casting; and (10) materials review and component failure analysis in support of coal gasification processes and plants.

Bradley, R.A. (comp.)

1984-06-01

297

Surface Gasification Materials Program. Semiannual progress report for the period ending March 31, 1985  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. One of the goals of the program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. Another goal is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. Contents of this semiannual progress report include: (1) corrosion studies of plant materials surveillance tests; (2) slagging gasifier refractories - application/evaluation; (3) protective coatings and claddings - application/evaluation; (4) corrosion of structural ceramics in coal gasification environments; (5) advanced pressure vessel materials technology; (6) electroslag component casting; (7) production and evaluation of electroslag castings; (8) cost reduction of electroslag casting manufacturing process; and (9) quantitative microstructural characterization of steel casting.

Bradley, R.A.

1985-06-01

298

Coal gasification pilot plant support studies. Subtask 2-3. Void-gas stripping in coal gasification systems. [e. g. , Removal of oxygen by displacement with nitrogen  

SciTech Connect

An investigation was conducted to: Determine the mechanism of void-gas stripping in a moving packed bed of solids; determine the effect of system parameters on void-gas stripping requirements; and to develop a model for predicting the minimum amount of stripping gas required for a particular design application. The void-gas stripping investigation was carried out with an air-nitrogen gas system. Stripping was conducted in 4, 6, and 8-in. diameter columns with moving beds of sand, siderite, and coal char. The solids flow rate was varied over a wide range. In each test, the stripping gas (i.e., nitrogen) was added to the standpipe to displace the interstitial oxygen in the moving bed of solids. The oxygen concentration in the standpipe was monitored with a diffusion-type oxygen analyzer. The results show that for a downward-moving packed bed, the direction of the void-gas flow in the downcomer to be stripped is important. For void gas initially traveling down (relative to the wall) in the stripping section, stripping-gas requirements could be decreased by: decreasing the solids flow rate, increasing the standpipe diameter, raising the stripping-gas injection point, or increasing the pressure drop in the stripping section. For gas initially traveling up the downcomer relative to the downcomer wall, stripping-gas requirements could be decreased by: increasing the solids flow rate, decreasing the standpipe diameter, lowering the stripping-gas injection point, or decreasing the pressure drop in the stripping section. A model was developed, based on the relative solids-gas velocity in the stripper, to predict stripping-gas requirements for nonporous particles. This model predicted stripping-gas requirements for the sand and siderite material to within 20%.

Not Available

1980-10-01

299

Innovative Design of Complex Engineering Systems  

NASA Technical Reports Server (NTRS)

The document contains the proceedings of the training workshop on Innovative Design of Complex Engineering Systems. The workshop was held at the Peninsula Higher Education Center, Hampton, Virginia, March 23 and 24, 2004. The workshop was jointly sponsored by Old Dominion University and NASA. Workshop attendees came from NASA, other government agencies, industry and universities. The objectives of the workshop were to a) provide broad overviews of the diverse activities related to innovative design of high-tech engineering systems; and b) identify training needs for future aerospace work force development in the design area. The format of the workshop included fifteen, half-hour overview-type presentations, a panel discussion on how to teach and train engineers in innovative design, and three exhibits by commercial vendors.

Noor, Ahmed K. (Compiler)

2004-01-01

300

System Engineering of Photonic Systems for Space Application  

NASA Technical Reports Server (NTRS)

The application of photonics in space systems requires tight integration with the spacecraft systems to ensure accurate operation. This requires some detailed and specific system engineering to properly incorporate the photonics into the spacecraft architecture and to guide the spacecraft architecture in supporting the photonics devices. Recent research in product focused, elegant system engineering has led to a system approach which provides a robust approach to this integration. Focusing on the mission application and the integration of the spacecraft system physics incorporation of the photonics can be efficiently and effectively accomplished. This requires a clear understanding of the driving physics properties of the photonics device to ensure proper integration with no unintended consequences. The driving physics considerations in terms of optical performance will be identified for their use in system integration. Keywords: System Engineering, Optical Transfer Function, Optical Physics, Photonics, Image Jitter, Launch Vehicle, System Integration, Organizational Interaction

Watson, Michael D.; Pryor, Jonathan E.

2014-01-01

301

Exhaust gas recirculation system for a diesel engine  

Microsoft Academic Search

An exhaust gas recirculation system is provided for reducing the content of oxides of nitrogen in the exhaust of a diesel engine. The system is effective in recirculating variable amounts of exhaust gas back through the engine in relation to engine load by being operatively controlled in response to predetermined settings of the engine's fuel supply system.

R. A. Kern; C. L. McClung; J. R. Turner

1977-01-01

302

PROGRAMME SPECIFICATION UNDERGRADUATE PROGRAMMES BEng Computer Systems Engineering/BEng  

E-print Network

1 PROGRAMME SPECIFICATION ­ UNDERGRADUATE PROGRAMMES KEY FACTS Programme name BEng Computer Systems of partnership Articulation PROGRAMME SUMMARY BEng in Computer Systems Engineering is a three year Bachelor Engineering/BEng Computer Systems Engineering with Placement Award BEng (Hons) School School of Engineering

Weyde, Tillman

303

Decision-Making Ontology for Information System Engineering  

E-print Network

Decision-Making Ontology for Information System Engineering Elena Kornyshova, Rébecca Deneckère CRI the requirements engineering field. Keywords: Decision-making, Ontology, Information System Engineering. 1.kornyshova,rebecca.deneckere}@univ-paris1.fr Abstract. Information Systems (IS) engineering (ISE) processes contain steps where decisions

Paris-Sud XI, Université de

304

Handbook of biomass downdraft gasifier engine systems  

Microsoft Academic Search

This handbook has been prepared by the Solar Energy Research Institute under the US Department of Energy \\/bold Solar Technical Information Program\\/. It is intended as a guide to the design, testing, operation, and manufacture of small-scale (less than 200 kW (270 hp)) gasifiers. A great deal of the information will be useful for all levels of biomass gasification. The

T. B. Reed; A. Das

1988-01-01

305

SPOTLIGHT on: Jennifer Dowling Industrial and Systems Engineering  

E-print Network

SPOTLIGHT on: Jennifer Dowling Industrial and Systems Engineering Hometown: La Mirada, CA Involvement at USC: Society of Women Engineers- Corporate Affairs Committee member, Institute of Industrial Engineers- President, Viterbi Graduate Admissions Office- student staff member, Song Girl 2007 Favorite

Wang, Hai

306

40 CFR 86.1318-84 - Engine dynamometer system calibrations.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Engine dynamometer system calibrations...IN-USE HIGHWAY VEHICLES AND ENGINES (CONTINUED) Emission Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate...

2013-07-01

307

40 CFR 86.1318-84 - Engine dynamometer system calibrations.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Engine dynamometer system calibrations...IN-USE HIGHWAY VEHICLES AND ENGINES (CONTINUED) Emission Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate...

2012-07-01

308

40 CFR 86.1318-84 - Engine dynamometer system calibrations.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Engine dynamometer system calibrations...IN-USE HIGHWAY VEHICLES AND ENGINES (CONTINUED) Emission Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate...

2011-07-01

309

40 CFR 89.329 - Engine cooling system.  

Code of Federal Regulations, 2010 CFR

An engine cooling system is required with sufficient capacity to maintain the engine at normal operating temperatures as prescribed by the engine manufacturer. [59 FR 31335, June 17, 1994. Redesignated at 63 FR 56995, Oct. 23,...

2010-07-01

310

System Dynamics and Vibration Lab Dept. of Mechanical Engineering  

E-print Network

System Dynamics and Vibration Lab Dept. of Mechanical Engineering Component Mode Synthesis Using Nonlinear Normal Modes Polarit Apiwattanalunggarn and Steven Shaw Department of Mechanical Engineering Michigan State University East Lansing, MI Christophe Pierre Department of Mechanical Engineering

Shaw, Steven W.

311

Investigation of Exoskeletal Engine Propulsion System Concept  

NASA Technical Reports Server (NTRS)

An innovative approach to gas turbine design involves mounting compressor and turbine blades to an outer rotating shell. Designated the exoskeletal engine, compression (preferable to tension for high-temperature ceramic materials, generally) becomes the dominant blade force. Exoskeletal engine feasibility lies in the structural and mechanical design (as opposed to cycle or aerothermodynamic design), so this study focused on the development and assessment of a structural-mechanical exoskeletal concept using the Rolls-Royce AE3007 regional airliner all-axial turbofan as a baseline. The effort was further limited to the definition of an exoskeletal high-pressure spool concept, where the major structural and thermal challenges are represented. The mass of the high-pressure spool was calculated and compared with the mass of AE3007 engine components. It was found that the exoskeletal engine rotating components can be significantly lighter than the rotating components of a conventional engine. However, bearing technology development is required, since the mass of existing bearing systems would exceed rotating machinery mass savings. It is recommended that once bearing technology is sufficiently advanced, a "clean sheet" preliminary design of an exoskeletal system be accomplished to better quantify the potential for the exoskeletal concept to deliver benefits in mass, structural efficiency, and cycle design flexibility.

Roche, Joseph M.; Palac, Donald T.; Hunter, James E.; Myers, David E.; Snyder, Christopher A.; Kosareo, Daniel N.; McCurdy, David R.; Dougherty, Kevin T.

2005-01-01

312

Chain modeling for life cycle systems engineering  

SciTech Connect

Throughout Sandia`s history, products have been represented by drawings. Solid modeling systems have recently replaced drawings as the preferred means for representing product geometry. These systems are used for product visualization, engineering analysis and manufacturing planning. Unfortunately, solid modeling technology is inadequate for life cycle systems engineering, which requires maintenance of technical history, efficient management of geometric and non-geometric data, and explicit representation of engineering and manufacturing characteristics. Such information is not part of the mathematical foundation of solid modeling. The current state-of-the-art in life cycle engineering is comprised of painstakingly created special purpose tools, which often are incompatible. New research on {open_quotes}chain modeling{close_quotes} provides a method of chaining the functionality of a part to the geometric representation. Chain modeling extends classical solid modeling to include physical, manufacturing, and procedural information required for life cycle engineering. In addition, chain modeling promises to provide the missing theoretical basis for Sandia`s parent/child product realization paradigm. In chain modeling, artifacts and systems are characterized in terms of their combinatorial properties: cell complexes, chains, and their operators. This approach is firmly rooted in algebraic topology and is a natural extension of current technology. The potential benefits of this approach include explicit hierarchical and combinatorial representation of physics, geometry, functionality, test, and legacy data in a common computational framework that supports a rational decision process and partial design automation. Chain modeling will have a significant impact on design preservation, system identification, parameterization, system reliability, and design simplification.

Rivera, J.J. [Sandia National Lab., Albuquerque, NM (United States); Shapiro, V. [Univ. of Wisconsin, Madison, WI (United States). Spatial Automation Lab.

1997-12-01

313

Video display engineering and optimization system  

NASA Technical Reports Server (NTRS)

A video display engineering and optimization CAD simulation system for designing a LCD display integrates models of a display device circuit, electro-optics, surface geometry, and physiological optics to model the system performance of a display. This CAD system permits system performance and design trade-offs to be evaluated without constructing a physical prototype of the device. The systems includes a series of modules which permit analysis of design trade-offs in terms of their visual impact on a viewer looking at a display.

Larimer, James (Inventor)

1997-01-01

314

Ignition system for internal combustion engines  

Microsoft Academic Search

An ingition system for internal combustion engines has dwell angle control apparatus for controlling the switching times of an electronic switch in the primary circuit of an ignition coil in dependence on the signals of a rotating sensor or an ignition computer. Specifically, speed dependent counting values are periodically generated in a counting apparatus each being counted down in a

W. Jundt; M. Mezger; K. Seeger

1982-01-01

315

SCIENTISTS AND ENGINEERS STATISTICAL DATA SYSTEM (SESTAT)  

EPA Science Inventory

SESTAT is a comprehensive and integrated system of information about the employment, educational, and demographic characteristics of scientists and engineers (S&E) in the United States. In concept it covers those with a bachelor's degree or higher who either work in or are educat...

316

2014 GRADUATE STUDIES TRANSPORTATION SYSTEMS ENGINEERING  

E-print Network

-of-good-repair, and economic com- petitiveness. Georgia Tech is also a partner on the UC Davis Sustainable Transportation for intermodal transportation, sustainable development and transpor- tation, application of geographic informa2014 GRADUATE STUDIES TRANSPORTATION SYSTEMS ENGINEERING RESEARCH AREAS SELECTED COURSES UNIVERSITY

Wang, Yuhang

317

A Retrieval System for Engineering Drawings.  

ERIC Educational Resources Information Center

The design and implementation of a complete, computerized retrieval system for the engineering and architectural drawings and maps of several large land development firms are discussed. Such collections present unique problems to the cataloger. Each collection is limited in geographic scope to the land owned or developed by the firm; types of maps…

Tenopir, Carol; Cibbarelli, Pamela

318

A performance measurement system for engineering services  

NASA Technical Reports Server (NTRS)

A performance measurement system which provides both a means of monitoring performance and a resource to support management decision making is described. The process of performance indicator development is discussed and typical indicators are described. The paper concludes with a summary of some of the lessons learned in applying productivity measurements to engineering services tasks and in automating data collection, evaluation and interpretation.

West, R. L.

1985-01-01

319

Requirements for Automotive System Engineering Tools  

Microsoft Academic Search

The requirements to system and software development tools brought up by the automotive industry differ from the requirements that other customers have. The important catchwords here are heterogeneity of suppliers, tools, tech- nical background of the engineers, and - partially resulting from the just mentioned - the overall complexity of the sys- tems that are built up. There are multiple

Joachim Schlosser; BMW AG

2002-01-01

320

Intelligent tutoring systems for systems engineering methodologies  

NASA Technical Reports Server (NTRS)

The general goal is to provide the technology required to build systems that can provide intelligent tutoring in IDEF (Integrated Computer Aided Manufacturing Definition Method) modeling. The following subject areas are covered: intelligent tutoring systems for systems analysis methodologies; IDEF tutor architecture and components; developing cognitive skills for IDEF modeling; experimental software; and PC based prototype.

Meyer, Richard J.; Toland, Joel; Decker, Louis

1991-01-01

321

The systems engineering overview and process (from the Systems Engineering Management Guide, 1990)  

NASA Astrophysics Data System (ADS)

The past several decades have seen the rise of large, highly interactive systems that are on the forward edge of technology. As a result of this growth and the increased usage of digital systems (computers and software), the concept of systems engineering has gained increasing attention. Some of this attention is no doubt due to large program failures which possibly could have been avoided, or at least mitigated, through the use of systems engineering principles. The complexity of modern day weapon systems requires conscious application of systems engineering concepts to ensure producible, operable and supportable systems that satisfy mission requirements. Although many authors have traced the roots of systems engineering to earlier dates, the initial formalization of the systems engineering process for military development began to surface in the mid-1950s on the ballistic missile programs. These early ballistic missile development programs marked the emergence of engineering discipline 'specialists' which has since continued to grow. Each of these specialties not only has a need to take data from the overall development process, but also to supply data, in the form of requirements and analysis results, to the process. A number of technical instructions, military standards and specifications, and manuals were developed as a result of these development programs. In particular, MILSTD-499 was issued in 1969 to assist both government and contractor personnel in defining the systems engineering effort in support of defense acquisition programs. This standard was updated to MIL-STD499A in 1974, and formed the foundation for current application of systems engineering principles to military development programs.

322

The systems engineering overview and process (from the Systems Engineering Management Guide, 1990)  

NASA Technical Reports Server (NTRS)

The past several decades have seen the rise of large, highly interactive systems that are on the forward edge of technology. As a result of this growth and the increased usage of digital systems (computers and software), the concept of systems engineering has gained increasing attention. Some of this attention is no doubt due to large program failures which possibly could have been avoided, or at least mitigated, through the use of systems engineering principles. The complexity of modern day weapon systems requires conscious application of systems engineering concepts to ensure producible, operable and supportable systems that satisfy mission requirements. Although many authors have traced the roots of systems engineering to earlier dates, the initial formalization of the systems engineering process for military development began to surface in the mid-1950s on the ballistic missile programs. These early ballistic missile development programs marked the emergence of engineering discipline 'specialists' which has since continued to grow. Each of these specialties not only has a need to take data from the overall development process, but also to supply data, in the form of requirements and analysis results, to the process. A number of technical instructions, military standards and specifications, and manuals were developed as a result of these development programs. In particular, MILSTD-499 was issued in 1969 to assist both government and contractor personnel in defining the systems engineering effort in support of defense acquisition programs. This standard was updated to MIL-STD499A in 1974, and formed the foundation for current application of systems engineering principles to military development programs.

1993-01-01

323

The gasification of coal  

Microsoft Academic Search

Coal gasification entails the treatment of coal with air, oxygen, steam, or CO2, or mixtures of these gases, to yield a combustible gaseous product. The product of primary gasification is usually a mixture of H2, CO, CO2, CH4, inerts (such as nitrogen), and minor amounts of hydrocarbons and impurities. Low Btu gas is produced if an air-steam mixture is used

L. K. Mudge; G. F. Schiefelbein; C. T. Li; R. H. Moore

1974-01-01

324

Egr control system for internal combustion engine  

SciTech Connect

An egr control system for an internal combustion engine is provided with a control valve member movably disposed in an intake passageway downstream of a throttle valve. The control valve member is movable in the axial direction of a portion of the intake passageway angularly connected to an intake manifold, in accordance with the variation of engine load conditions. For example, the control valve member is connected to a diaphragm member which receives intake manifold vacuum so that the control valve member is movable in response to the intake manifold vacuum.

Aoyama, S.

1981-01-20

325

The JWST data management system engineering database  

NASA Astrophysics Data System (ADS)

The Engineering Data Processing (EDP) component of the James Webb Telescope (JWST) Data Management System (DMS) will collect calibrated engineering values for about 15,000 parameters, 300 million samples per day, with a potential daily database growth of 14 GB, 5 TB per year, 50 TB for a 10-year mission. While data will be mostly received in (time, parameter) order, fast access requires translation into (parameter, time) organization and sorting. Organization and indexing of the data will affect storage requirements as well as ingest and access efficiency. Fast access is critical to pipelines processing and calibrating science data.

Nieto-Santisteban, Maria A.

2012-09-01

326

Steam transmission line system engineering  

SciTech Connect

There are many reasons that create the need to convey steam a long distance from its point of generation to the point of use. The steam transmission line conveys the entire capacity of the steam generator and it is the largest diameter line in the district energy system. It is assumed here that the steam transmission line also conveys the steam a long distance. This analysis is facilitated by considering a {open_quotes}Transport Factor{open_quotes} which equals the product of the steam mass flow rate and the length of the steam transmission line. This sets the problem up as a transportation problem, typical in elementary operations research. Included here in one concurrent analysis is the simulated thermophysical performance, which supports the development of an economic marginal production function. Also construction and operating costs are estimated which supports the development of a economic marginal cost function. Marginal analysis methods give the best selection of steam transmission line diameter which has the best utility.

Carr, C. [Univ. of Maryland, College Park (United States)

1996-11-01

327

14 CFR 23.1111 - Turbine engine bleed air system.  

Code of Federal Regulations, 2012 CFR

...TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Powerplant Induction System § 23.1111 Turbine engine bleed air system. For turbine engine bleed air systems, the following...

2012-01-01

328

14 CFR 23.1111 - Turbine engine bleed air system.  

Code of Federal Regulations, 2013 CFR

...TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Powerplant Induction System § 23.1111 Turbine engine bleed air system. For turbine engine bleed air systems, the following...

2013-01-01

329

14 CFR 23.1111 - Turbine engine bleed air system.  

Code of Federal Regulations, 2011 CFR

...TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Powerplant Induction System § 23.1111 Turbine engine bleed air system. For turbine engine bleed air systems, the following...

2011-01-01

330

14 CFR 23.1111 - Turbine engine bleed air system.  

...TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Powerplant Induction System § 23.1111 Turbine engine bleed air system. For turbine engine bleed air systems, the following...

2014-01-01

331

Systems engineering for Air Force C3I systems  

NASA Astrophysics Data System (ADS)

Each day, sophisticated information systems provide the U.S. with crucial capabilities both to understand the world situation and to react effectively as required by our nation's decision makers. These systems attest to the success of the cooperative efforts of government and industry. Over the last 35 years, to help provide those capabilities, The MITRE Corporation has been privileged to fulfill the role of systems engineer on more than 100 different command, control, communications, and intelligence (C3I) systems for the Air Force and other elements of the Department of Defense (DOD). A long history of successful performance in this broad role provides MITRE with detailed knowledge of the systems' operational capabilities and needs, proficiency in their systems engineering, and a C3I-related corporate memory unmatched by any other organization. That background is the foundation of this book on systems engineering at MITRE.

Monahan, John H.

1993-06-01

332

7th Annual Systems Biology Symposium: Systems Biology and Engineering  

SciTech Connect

Systems biology recognizes the complex multi-scale organization of biological systems, from molecules to ecosystems. The International Symposium on Systems Biology has been hosted by the Institute for Systems Biology in Seattle, Washington, since 2002. The annual two-day event gathers the most influential researchers transforming biology into an integrative discipline investingating complex systems. Engineering and application of new technology is a central element of systems biology. Genome-scale, or very small-scale, biological questions drive the enigneering of new technologies, which enable new modes of experimentation and computational analysis, leading to new biological insights and questions. Concepts and analytical methods in engineering are now finding direct applications in biology. Therefore, the 2008 Symposium, funded in partnership with the Department of Energy, featured global leaders in "Systems Biology and Engineering."

Galitski, Timothy P.

2008-04-01

333

Prerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of  

E-print Network

Thesis IDSC-LG-FZ-05 Gas Diesel Engine Modeling and Control The gas diesel engine is a natural gas enginePrerequisites: Control Systems I+II, System Modeling, Engine Class (Introduction to Modeling and Control of Internal Combustion Engine Systems, IC Engines, ...), Optimization Course, Matlab

Lygeros, John

334

Engineering Design Information System (EDIS) user' manual  

SciTech Connect

This manual is a guide to the use of the Engineering Design Information System (EDIS). The system runs on the Martin Marietta Energy Systems, Inc., IBM 3084 unclassified computer. EDIS is in the second phase of implementation, which provides an index, storage, and retrieval system for engineering documents produced at various plants and laboratories operated by Energy Systems for the Department of Energy (DOE). The second phase also provides additional hard copy request functionality. Section 2.0 of this manual presents an overview of EDIS, describing the system's purpose; the functions it performs; hardware, software, and security requirements; and help and error functions. Section 3.0 describes how to access EDIS and how to operate system functions using Database 2 (DB2), Time Sharing Option (TSO), Interactive System Productivity Facility (ISPF), Soft Master viewing, and FT/Express file transfer features employed by this system. Appendix A lists the special hardware and software requirements that must be met to run the View function. Appendix B contains a description of the Soft Master viewing capabilities provided through the EDIS View function. Appendix C contains a list of special hardware and software requirements for the Store and Download functions of EDIS. Appendix D provides examples of the system error screens and help screens for valid codes used for screen entry. Appendix E contains a dictionary of data elements and descriptions.

Smith, P.S.; Short, R.D.

1991-11-01

335

Experimental analysis of biomass gasification with steam and oxygen  

Microsoft Academic Search

Parametric tests are performed on an indirectly heated, fluidized bed biomass gasifier. The test system allows feedstock, oxygen, nitrogen, and steam flow rates, and temperature to be controlled independently. Gas residence time, temperature, equivalence ratio, and steam:biomass ratio are varied, and product gas composition and select gasification parameters are evaluated and compared with theoretical predictions. Methanol, produced via biomass gasification,

Y. Wang; C. M. Kinoshita

1992-01-01

336

Wood gasification for gas and power generation  

SciTech Connect

A wood-chip gasifier supplying 4.05 million Btu (4.27 GJ)/hr of low-Btu fuel gas to a diesel-engine power generator has demonstrated its suitability as an efficient energy alternative for isolated communities in Canada's heavily wooded northern areas. Preliminary tests with wet spruce chips (58% water) yielded a clean 112-130 Btu/CF (4.4-5.07 MJ/m/sup 3/) gas that is easily combusted in a naturally aspirated diesel engine requiring diesel fuel only or ignition purposes. Although designed as a fluidized-bed system, the gasifier operated essentially in a fixed updraft-flow mode; the wet spruce chips tended to lock together, thus preventing fluidization. A study of the social and environmental consequences of power generation via wood gasification in typical northern communities revealed adequate wood supplies, social benefits related to permanent local employment and a reliable fuel supply, and a minimal negative impact on the environment.

Verma, A.; Weisgerber, G.A.

1980-01-01

337

Model based systems engineering for astronomical projects  

NASA Astrophysics Data System (ADS)

Model Based Systems Engineering (MBSE) is an emerging field of systems engineering for which the System Modeling Language (SysML) is a key enabler for descriptive, prescriptive and predictive models. This paper surveys some of the capabilities, expectations and peculiarities of tools-assisted MBSE experienced in real-life astronomical projects. The examples range in depth and scope across a wide spectrum of applications (for example documentation, requirements, analysis, trade studies) and purposes (addressing a particular development need, or accompanying a project throughout many - if not all - its lifecycle phases, fostering reuse and minimizing ambiguity). From the beginnings of the Active Phasing Experiment, through VLT instrumentation, VLTI infrastructure, Telescope Control System for the E-ELT, until Wavefront Control for the E-ELT, we show how stepwise refinements of tools, processes and methods have provided tangible benefits to customary system engineering activities like requirement flow-down, design trade studies, interfaces definition, and validation, by means of a variety of approaches (like Model Checking, Simulation, Model Transformation) and methodologies (like OOSEM, State Analysis)

Karban, R.; Andolfato, L.; Bristow, P.; Chiozzi, G.; Esselborn, M.; Schilling, M.; Schmid, C.; Sommer, H.; Zamparelli, M.

2014-08-01

338

Fixed-bed gasification research using US coals. Volume 5. Gasification of Stahlman Stoker bituminous coal  

SciTech Connect

A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the fifth volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of Stahlman Stoker bituminous coal from Clarion County, PA. The period of the gasification test was April 30 to May 4, 1983. 4 refs., 16 figs., 10 tabs.

Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

1985-03-31

339

Fixed-bed gasification research using US coals. Volume 6. Gasification of delayed petroleum coke  

SciTech Connect

A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the sixth volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of delayed petroleum coke from Pine Bend, MN. The period of the gasification test was June 1-17, 1983. 2 refs., 15 figs., 22 tabs.

Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

1985-05-01

340

Fixed-bed gasification research using US coals. Volume 4. Gasification of Leucite Hills subbituminous coal  

SciTech Connect

A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the fourth volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of Leucite Hills subbituminous coal from Sweetwater County, Wyoming. The period of the gasification test was April 11-30, 1983. 4 refs., 23 figs., 27 tabs.

Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

1985-03-31

341

AN APPROACH OF SYSTEMS ENGINEERING ON GEOGRAPHICS INFORMATIONS SYSTEMS  

Microsoft Academic Search

The Information Systems (IS) were developed with goal of supporting the functions operational, managerial and more recently of support the existent making decision in an organization. The users of those systems are coming as much of the operational level, as of the tactical and same level strategic of the organization. In the Systems Engineering Technology origin the first classifications of

DIONÍSIO COSTA; CRUZ JÚNIOR; JULIA CELIA; MERCEDES STRAUCH; LEONARDO CASTRO DE OLIVEIRA

342

Fuel-cell engine stream conditioning system  

DOEpatents

A stream conditioning system for a fuel cell gas management system or fuel cell engine. The stream conditioning system manages species potential in at least one fuel cell reactant stream. A species transfer device is located in the path of at least one reactant stream of a fuel cell's inlet or outlet, which transfer device conditions that stream to improve the efficiency of the fuel cell. The species transfer device incorporates an exchange media and a sorbent. The fuel cell gas management system can include a cathode loop with the stream conditioning system transferring latent and sensible heat from an exhaust stream to the cathode inlet stream of the fuel cell; an anode humidity retention system for maintaining the total enthalpy of the anode stream exiting the fuel cell related to the total enthalpy of the anode inlet stream; and a cooling water management system having segregated deionized water and cooling water loops interconnected by means of a brazed plate heat exchanger.

DuBose, Ronald Arthur (Marietta, GA)

2002-01-01

343

Evolution of a Unique Systems Engineering Capability  

SciTech Connect

The Idaho National Laboratory (INL) is a science-based, applied engineering laboratory dedicated to supporting U.S. Department of Energy missions in nuclear and energy research, science, and national security. The INL’s Systems Engineering organization supports all of the various programs under this wide array of missions. As with any multifaceted organization, strategic planning is essential to establishing a consistent culture and a value discipline throughout all levels of the enterprise. While an organization can pursue operational excellence, product leadership or customer intimacy, it is extremely difficult to excel or achieve best-in-class at all three. In fact, trying to do so has resulted in the demise of a number of organizations given the very intricate balancing act that is necessary. The INL’s Systems Engineering Department has chosen to focus on customer intimacy where the customer’s needs are first and foremost and a more total solution is the goal. Frequently a total solution requires the employment of specialized tools to manage system complexity. However, it is only after understanding customer needs that tool selection and use would be pursued. This results in using both commercial-off-the-shelf (COTS) tools and, in some cases, requires internal development of specialized tools. This paper describes how a unique systems engineering capability, through the development of customized tools, evolved as a result of this customer-focused culture. It also addresses the need for a common information model or analysis framework and presents an overview of the tools developed to manage and display relationships between entities, support trade studies through the application of utility theory, and facilitate the development of a technology roadmap to manage system risk and uncertainty.

Robert M. Caliva; James A. Murphy; Kyle B. Oswald

2011-06-01

344

ENGINEERED BARRIER SYSTEM: PHYSICAL AND CHEMICAL ENVIRONMENT  

SciTech Connect

The purpose of this report is to describe the evolution of the physical and chemical environmental conditions within the waste emplacement drifts of the repository, including the drip shield and waste package surfaces. The abstraction model is used in the total system performance assessment for the license application (TSPA LA) to assess the performance of the engineered barrier system and the waste form. This report develops and documents a set of these abstraction-level models that describe the engineered barrier system physical and chemical environment. Where possible, these models use information directly from other reports as input, which promotes integration among process models used for TSPA-LA. Specific tasks and activities of modeling the physical and chemical environment are included in ''Technical Work Plan for: Near-Field Environment and Transport In-Drift Geochemistry Model Report Integration'' (BSC 2004 [DIRS 171156], Section 1.2.2). As described in the technical work plan, the development of this report is coordinated with the development of other engineered barrier system reports.

G.H. Nieder-Westermann

2005-04-07

345

Project Recap Humanitarian Engineering Biodiesel Boiler System for Steam Generator  

E-print Network

Project Recap Humanitarian Engineering ­ Biodiesel Boiler System for Steam Generator Currently 70 biodiesel boiler system to drive a steam engine generator. This system is to provide electricity the customer needs, a boiler fueled by biodiesel and outputting to a steam engine was decided upon. The system

Demirel, Melik C.

346

Systems Engineering in NASA's R&TD Programs  

NASA Technical Reports Server (NTRS)

Systems engineering is largely the analysis and planning that support the design, development, and operation of systems. The most common application of systems engineering is in guiding systems development projects that use a phased process of requirements, specifications, design, and development. This paper investigates how systems engineering techniques should be applied in research and technology development programs for advanced space systems. These programs should include anticipatory engineering of future space flight systems and a project portfolio selection process, as well as systems engineering for multiple development projects.

Jones, Harry

2005-01-01

347

Cardiac tissue engineering using perfusion bioreactor systems  

PubMed Central

This protocol describes tissue engineering of synchronously contractile cardiac constructs by culturing cardiac cell populations on porous scaffolds (in some cases with an array of channels) and bioreactors with perfusion of culture medium (in some cases supplemented with an oxygen carrier). The overall approach is ‘biomimetic’ in nature as it tends to provide in vivo-like oxygen supply to cultured cells and thereby overcome inherent limitations of diffusional transport in conventional culture systems. In order to mimic the capillary network, cells are cultured on channeled elastomer scaffolds that are perfused with culture medium that can contain oxygen carriers. The overall protocol takes 2–4 weeks, including assembly of the perfusion systems, preparation of scaffolds, cell seeding and cultivation, and on-line and end-point assessment methods. This model is well suited for a wide range of cardiac tissue engineering applications, including the use of human stem cells, and high-fidelity models for biological research. PMID:18388955

Radisic, Milica; Marsano, Anna; Maidhof, Robert; Wang, Yadong; Vunjak-Novakovic, Gordana

2009-01-01

348

Biomass Gasification Technology Assessment: Consolidated Report  

SciTech Connect

Harris Group Inc. (HGI) was commissioned by the National Renewable Energy Laboratory to assess gasification and tar reforming technologies. Specifically, the assessments focused on gasification and tar reforming technologies that are capable of producing a syngas suitable for further treatment and conversion to liquid fuels. HGI gathered sufficient information to analyze three gasification and tar reforming systems. This report summarizes the equipment, general arrangement of the equipment, operating characteristics, and operating severity for each technology. The order of magnitude capital cost estimates are supported by a basis-of-estimate write-up, which is also included in this report. The report also includes Microsoft Excel workbook models, which can be used to design and price the systems. The models can be used to analyze various operating capacities and pressures. Each model produces a material balance, equipment list, capital cost estimate, equipment drawings and preliminary general arrangement drawings. Example outputs of each model are included in the Appendices.

Worley, M.; Yale, J.

2012-11-01

349

Biothermal gasification of biomass  

SciTech Connect

The BIOTHERMGAS Process is described for conversion of biomass, organic residues, and peat to substitute natural gas (SNG). This new process, under development at IGT, combines biological and thermal processes for total conversion of a broad variety of organic feeds (regardless of water or nutrient content). The process employs thermal gasification for conversion of refractory digester residues. Ammonia and other inorganic nutrients are recycled from the thermal process effluent to the bioconversion unit. Biomethanation and catalytic methanation are presented as alternative processes for methanation of thermal conversion product gases. Waste heat from the thermal component is used to supply the digester heat requirements of the bioconversion component. The results of a preliminary systems analysis of three possible applications of this process are presented: (1) 10,000 ton/day Bermuda grass plant with catalytic methanation; (2) 10,000 ton/day Bermuda grass plant with biomethanation; and (3) 1000 ton/day municipal solid waste (MSW) sewage sludge plant with biomethanation. The results indicate that for these examples, performance is superior to that expected for biological or thermal processes used separately. The results of laboratory studies presented suggest that effective conversion of thermal product gases can be accomplished by biomethanation.

Chynoweth, D.P.; Srivastava, V.J.; Henry, M.P.; Tarman, P.B.

1980-01-01

350

Pulse Detonation Engine Air Induction System Analysis  

NASA Technical Reports Server (NTRS)

A preliminary mixed-compression inlet design concept for potential pulse-detonation engine (PDE) powered supersonic aircraft was defined and analyzed. The objectives of this research were to conceptually design and integrate an inlet/PDE propulsion system into a supersonic aircraft, perform time-dependent CFD analysis of the inlet flowfield, and to estimate the installed PDE cycle performance. The study was baselined to a NASA Mach 5 Waverider study vehicle in which the baseline over/under turboramjet engines were replaced with a single flowpath PDE propulsion system. As much commonality as possible was maintained with the baseline configuration, including the engine location and forebody lines. Modifications were made to the inlet system's external ramp angles and a rotating cowl lip was incorporated to improve off-design inlet operability and performance. Engines were sized to match the baseline vehicle study's ascent trajectory thrust requirement at Mach 1.2. The majority of this study was focused on a flight Mach number of 3.0. The time-dependent Navier Stokes CFD analyses of a two-dimensional approximation of the inlet was conducted for the Mach 3.0 condition. The Lockheed Martin Tactical Aircraft Systems-developed FALCON CFD code with a two equation 'k-1' turbulence model was used. The downstream PDE was simulated by an array of four sonic nozzles in which the flow areas were rapidly varied in various opening/closing combinations. Results of the CFD study indicated that the inlet design concept operated successfully at the Mach 3.0 condition, satisfying mass capture, total pressure recovery, and operability requirements. Time-dependent analysis indicated that pressure and expansion waves from the simulated valve perturbations did not effect the inlet's operability or performance.

Pegg, R. J.; Hunter, L. G.; Couch, B. D.

1996-01-01

351

Airfoil seal system for gas turbine engine  

DOEpatents

A turbine airfoil seal system of a turbine engine having a seal base with a plurality of seal strips extending therefrom for sealing gaps between rotational airfoils and adjacent stationary components. The seal strips may overlap each other and may be generally aligned with each other. The seal strips may flex during operation to further reduce the gap between the rotational airfoils and adjacent stationary components.

Diakunchak, Ihor S.

2013-06-25

352

Systems engineering in the Large Synoptic Survey Telescope project: an application of model based systems engineering  

NASA Astrophysics Data System (ADS)

The Large Synoptic Survey Telescope project was an early adopter of SysML and Model Based Systems Engineering practices. The LSST project began using MBSE for requirements engineering beginning in 2006 shortly after the initial release of the first SysML standard. Out of this early work the LSST's MBSE effort has grown to include system requirements, operational use cases, physical system definition, interfaces, and system states along with behavior sequences and activities. In this paper we describe our approach and methodology for cross-linking these system elements over the three classical systems engineering domains - requirement, functional and physical - into the LSST System Architecture model. We also show how this model is used as the central element to the overall project systems engineering effort. More recently we have begun to use the cross-linked modeled system architecture to develop and plan the system verification and test process. In presenting this work we also describe "lessons learned" from several missteps the project has had with MBSE. Lastly, we conclude by summarizing the overall status of the LSST's System Architecture model and our plans for the future as the LSST heads toward construction.

Claver, C. F.; Selvy, Brian M.; Angeli, George; Delgado, Francisco; Dubois-Felsmann, Gregory; Hascall, Patrick; Lotz, Paul; Marshall, Stuart; Schumacher, German; Sebag, Jacques

2014-08-01

353

Modular injection systems for miniature engines  

NASA Astrophysics Data System (ADS)

Mission requirements for Kinetic Energy Weapons will require miniaturization of current vehicle propulsion systems for future Space Defence Iniative Programs. A modular injection system (MIS) valve is presented which will decrease cost, size and weight of miniaturized storable bipropellant rocket engines and features two poppet-type propellant valve modules pneumatically linked to a pilot solenoid module. A prototype modular injection valve sized for 100lbf thrust was designed and is being tested to show lower costs, fewer moving parts and a reduction in weight and size. Results show that this valve meets objectives of one-half weight, one-half cost and one-fifth the envelopment of current production valves. Studies indicate that a cruciform configuration of four nominal 100lbf thrust engines can be controlled by four modular injection valve systems in a single housing of less than 1.0 m3. Following further development and correlation of results this concept may be scaled to control four higher thrust engines.

Cochran, Mike

1992-07-01

354

Engineering the interface between cellular chassis and synthetic biological systems  

E-print Network

The aim of my thesis is to help enable the engineering of biological systems that behave in a predictable manner. Well-established techniques exist to engineer systems that behave as expected. Here, I apply such techniques ...

Canton, Bartholomew (Bartholomew John)

2008-01-01

355

Engineering the Interface Between Cellular Chassis and Integrated Biological Systems  

E-print Network

The engineering of biological systems with predictable behavior is a challenging problem. One reason for this difficulty is that engineered biological systems are embedded within complex and variable host cells. To help ...

Canton, Bartholomew

2005-08-08

356

Black liquor gasification. Phase 2 final report  

SciTech Connect

The experimental work included 23 bench-scale tests in a 6-in.-diameter gasifier and two extended runs in a 33-in.-ID pilot-scale unit. The two pilot-scale runs included 26 test periods, each evaluated separately. The engineering analysis work consisted primarily of the correlation of test results and the development of a computer model describing the gasification process. 4 refs., 13 figs., 23 tabs.

Kohl, A.L.; Barclay, K.M.; Stewart, A.E.; Estes, G.R.

1984-11-28

357

The Art and Science of Systems Engineering  

NASA Technical Reports Server (NTRS)

The National Aeronautics and Space Administration (NASA) was established in 1958, and its Marshall Space Flight Center was founded in 1960, as space-related work was transferred from the Army Ballistic Missile Agency at Redstone Arsenal, where Marshall is located. With this heritage, Marshall contributes almost 50 years of systems engineering experience with human-rated launch vehicles and scientific spacecraft to fulfill NASA's mission exploration and discovery. These complex, highly specialized systems have provided vital platforms for expanding the knowledge base about Earth, the solar system, and cosmos; developing new technologies that also benefit life on Earth; and opening new frontiers for America's strategic space goals. From Mercury and Gemini, to Apollo and the Space Shuttle, Marshall's systems engineering expertise is an unsurpassed foundational competency for NASA and the nation. Current assignments comprise managing Space Shuttle Propulsion systems; developing environmental control and life support systems and coordinating science operations on the International Space Station; and a number of exploration-related responsibilities. These include managing and performing science missions, such as the Lunar Crater Observation and Sensing Satellite and the Lunar Reconnaissance Orbiter slated to launch for the Moon in April 2009, to developing the Ares I crew launch vehicle upper stage and integrating the vehicle stack in house, as well as designing the Ares V cargo launch vehicle and contributing to the development of the Altair Lunar Lander and an International Lunar Network with communications nodes and other infrastructure.

Singer, Christopher E.

2009-01-01

358

Exhaust gas recirculation control system for a diesel engine  

SciTech Connect

An exhaust gas recirculation control system is disclosed such that the throttle valve is controlled by two vacuum actuators through three stages of fully-opened, half-opened, and fully closed positions, in addition to the control of the exhaust gas recirculation control valve, in accordance with the engine operating conditions including engine load. The egr valve is fully closed under a heavy engine load and fully opened under a medium and light engine load, and the throttle valve is fully opened under a heavy engine load, half opened under a medium engine load, and fully closed under a light engine load, under due consideration of engine speed.

Kimura, Y.; Shiobara, M.; Yoshiba, Y.

1983-06-21

359

The interdisciplinary field of Biomedical Engineering combines elements of engineering (electronics, systems  

E-print Network

(electronics, systems analysis, fluid mechanics) with the life sciences (biology, physiology, biochemistry for Biomimetic Microelectronic Systems (BMES). COURSES OF INSTRUCTION The terms indicated are expected Engineering · BiomedicalEngineering Emphasis in Mechanical Engineering See pages 34-37 for the curricula

Rohs, Remo

360

Engine control system having speed-based timing  

DOEpatents

A control system for an engine having a cylinder is disclosed having an engine valve movable to regulate a fluid flow of the cylinder and an actuator associated with the engine valve. The control system also has a controller in communication with the actuator. The controller is configured to receive a signal indicative of engine speed and compare the engine speed signal with a desired engine speed. The controller is also configured to selectively regulate the actuator to adjust a timing of the engine valve to control an amount of air/fuel mixture delivered to the cylinder based on the comparison.

Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

2012-02-14

361

An agent system for collaborative version control in engineering  

E-print Network

systems towards the goal of an integrated engineering environment. The paperless design house is becoming of computer based systems aimed at the exchange and maintenance of data on large engineering productsAn agent system for collaborative version control in engineering Barry Florida-James Newcastle

Cheng, Eugenia

362

Internal combustion engine with an exhaust gas recirculation system  

Microsoft Academic Search

Disclosed is an internal combustion engine with an exhaust gas recirculation system. The engine is provided with an exhaust gas recirculation control valve device, a modulator valve device and a vacuum control valve device. The exhaust gas recirculation control valve device communicates an exhaust passage of the engine with an intake passage of the engine and is provided with a

J. Saiki; T. Kumai

1979-01-01

363

Low emission turbo compound engine system  

DOEpatents

A diesel or HHCI engine has an air intake and an exhaust for products of combustion. A pair of turbochargers receive the products of combustion in a series relationship and an exhaust aftertreatment device receive the products of combustion from the downstream turbine. A power turbine receives the output from the exhaust aftertreatment device and an EGR system of the power turbine passes a selected portion of the output to a point upstream of the upstream turbocharger compressor. A device adds fuel to the aftertreatment device to regenerate the particulate filter and the power turbine recoups the additional energy. The power turbine may be used to drive accessories or the prime output of the engine.

Vuk; Carl T. (Denver, IA)

2011-05-31

364

INDUSTRIAL & SYSTEMS ENGINEERING UNDERGRADUATE HANDBOOK 11/8//2010 RENSSELAER POLYTECHNIC INSTITUTE  

E-print Network

INDUSTRIAL & SYSTEMS ENGINEERING UNDERGRADUATE HANDBOOK 11/8//2010 RENSSELAER POLYTECHNIC INSTITUTE School of Engineering Industrial & Systems Engineering #12;2 INDUSTRIAL & SYSTEMS ENGINEERING .................................................................. 1 What is Industrial and Management Engineering (IME)? ......... 1 Are you a candidate for IME

Salama, Khaled

365

Selected Systems Engineering Process Deficiencies and Their Consequences  

NASA Technical Reports Server (NTRS)

The systems engineering process is well established and well understood. While this statement could be argued in the light of the many systems engineering guidelines and that have been developed, comparative review of these respective descriptions reveal that they differ primarily in the number of discrete steps or other nuances, and are at their core essentially common. Likewise, the systems engineering textbooks differ primarily in the context for application of systems engineering or in the utilization of evolved tools and techniques, not in the basic method. Thus, failures in systems engineering cannot credibly be attributed to implementation of the wrong systems engineering process among alternatives. However, numerous systems failures can be attributed to deficient implementation of the systems engineering process. What may clearly be perceived as a system engineering deficiency in retrospect can appear to be a well considered system engineering efficiency in real time - an efficiency taken to reduce cost or meet a schedule, or more often both. Typically these efficiencies are grounded on apparently solid rationale, such as reuse of heritage hardware or software. Over time, unintended consequences of a systems engineering process deficiency may begin to be realized, and unfortunately often the consequence is system failure. This paper describes several actual cases of system failures that resulted from deficiencies in their systems engineering process implementation, including the Ariane 5 and the Hubble Space Telescope.

Thomas, Lawrence Dale

2006-01-01

366

RICCATI EQUATIONS lN SYSTEM ENGINEER ING-kfoore. 29 Applicationof Riccati Equationsin System Engineering  

E-print Network

RICCATI EQUATIONS lN SYSTEM ENGINEER ING-kfoore. 29 Applicationof Riccati Equationsin System because of rhe~ dependence on matrix Riccati differentialequation theory and in some apph~nons Of,the results the soluuon. of a matrix Riccati diRcrential equatronmreqtured. The second reasonn that many

Moore, John Barratt

367

Production of Hydrogen from Underground Coal Gasification  

DOEpatents

A system of obtaining hydrogen from a coal seam by providing a production well that extends into the coal seam; positioning a conduit in the production well leaving an annulus between the conduit and the coal gasification production well, the conduit having a wall; closing the annulus at the lower end to seal it from the coal gasification cavity and the syngas; providing at least a portion of the wall with a bifunctional membrane that serves the dual purpose of providing a catalyzing reaction and selectively allowing hydrogen to pass through the wall and into the annulus; and producing the hydrogen through the annulus.

Upadhye, Ravindra S. (Pleasanton, CA)

2008-10-07

368

Fiber-optic engineering sensor system  

NASA Astrophysics Data System (ADS)

The conceptual design for a fiber-optic engineering sensor system adaptable to many Navy systems is presented. The sensor system consists of the following components: (1) A variety of amplitude type fiber optic sensors, each designed to measure a different physical parameter; (2) Optoelectronic circuitry to control the fiber optic sensors; and (3) A local fiber optic telemetry subsystem that communicates sensor data to other ships' equipment. Details of the sensor system design along with the advantages and potential risks of the proposed system are discussed. Primary advantages are the introduction of standard interface between existing ship's equipment and a large variety of sensor types, increased performance and system flexibility, and reduced sensor size, weight, and cost. Presented is an evaluation of the sensor and data telemetry requirements of the propulsion control system of the DDG-51. Specifically addressed is the Shaft Control Unit (SCU) of that system. The SCU has been selected as a design model because it represents the current state of control system architecture and appears to be an ideal application for the introduction of fiber optic systems.

369

Optical monitoring system for a turbine engine  

DOEpatents

The monitoring system for a gas turbine engine including a viewing tube assembly having an inner end and an outer end. The inner end is located adjacent to a hot gas flow path within the gas turbine engine and the outer end is located adjacent to an outer casing of the gas turbine engine. An aperture wall is located at the inner end of the viewing tube assembly and an optical element is located within the viewing tube assembly adjacent to the inner end and is spaced from the aperture wall to define a cooling and purge chamber therebetween. An aperture is defined in the aperture wall for passage of light from the hot gas flow path to the optical element. Swirl passages are defined in the viewing tube assembly between the aperture wall and the optical element for passage of cooling air from a location outside the viewing tube assembly into the chamber, wherein swirl passages effect a swirling movement of air in a circumferential direction within the chamber.

Lemieux, Dennis H; Smed, Jan P; Williams, James P; Jonnalagadda, Vinay

2013-05-14

370

6.828 Operating System Engineering, Fall 2003  

E-print Network

Teaches the fundamentals of engineering operating systems. The following topics are studied in detail: virtual memory, kernel and user mode, system calls, threads, context switches, interrupts, interprocess communication, ...

Kaashoek, Frans, 1965-

371

1A-01 C JOG System Engineering, IncA-1 SHIPBOARD SYSTEM INTERFACE  

E-print Network

1A-01 C JOG System Engineering, IncA-1 SHIPBOARD SYSTEM INTERFACE DEVELOPMENT Presented at the Naval Post Graduate School August 12, 2004 Jeffrey O. Grady President, JOG System Engineering, Inc. 6015;1A-01 C JOG System Engineering, IncA-2 CURRENT POSITION President, JOG System Engineering, Inc

372

Template for Systems Engineering Tools Trade Study  

NASA Technical Reports Server (NTRS)

A discussion of Systems Engineering tools brings out numerous preferences and reactions regarding tools of choice as well as the functions those tools are to perform. A recent study of Systems Engineering Tools for a new Program illustrated the need for a generic template for use by new Programs or Projects to determine the toolset appropriate for their use. This paper will provide the guidelines new initiatives can follow and tailor to their specific needs, to enable them to make their choice of tools in an efficient and informed manner. Clearly, those who perform purely technical functions will need different tools than those who perform purely systems engineering functions. And, everyone has tools they are comfortable with. That degree of comfort is frequently the deciding factor in tools choice rather than an objective study of all criteria and weighting factors. This paper strives to produce a comprehensive list of criteria for selection with suggestions for weighting factors based on a number of assumptions regarding the given Program or Project. In addition, any given Program will begin with assumptions for its toolset based on Program size, tool cost, user base and technical needs. In providing a template for tool selection, this paper will guide the reader through assumptions based on Program need; decision criteria; potential weighting factors; the need for a compilation of available tools; the importance of tool demonstrations; and finally a down selection of tools. While specific vendors cannot be mentioned in this work, it is expected that this template could serve other Programs in the formulation phase by alleviating the trade study process of some of its subjectivity.

Bailey, Michelle D.

2005-01-01

373

ADAPTIVE CLEARANCE CONTROL SYSTEMS FOR TURBINE ENGINES  

NASA Technical Reports Server (NTRS)

The Controls and Dynamics Technology Branch at NASA Glenn Research Center primarily deals in developing controls, dynamic models, and health management technologies for air and space propulsion systems. During the summer of 2004 I was granted the privilege of working alongside professionals who were developing an active clearance control system for commercial jet engines. Clearance, the gap between the turbine blade tip and the encompassing shroud, increases as a result of wear mechanisms and rubbing of the turbine blades on shroud. Increases in clearance cause larger specific fuel consumption (SFC) and loss of efficient air flow. This occurs because, as clearances increase, the engine must run hotter and bum more fuel to achieve the same thrust. In order to maintain efficiency, reduce fuel bum, and reduce exhaust gas temperature (EGT), the clearance must be accurately controlled to gap sizes no greater than a few hundredths of an inch. To address this problem, NASA Glenn researchers have developed a basic control system with actuators and sensors on each section of the shroud. Instead of having a large uniform metal casing, there would be sections of the shroud with individual sensors attached internally that would move slightly to reform and maintain clearance. The proposed method would ultimately save the airline industry millions of dollars.

Blackwell, Keith M.

2004-01-01

374

An engineering data management system for IPAD  

NASA Technical Reports Server (NTRS)

An overview of the capabilities and software architecture of the IPAD information processor (IPIP) is presented. IPIP is a state-of-the-art data base management system that satisfies engineering requirements not addressed by present day commercial systems. It also significantly advances a number of capabilities that are offered commercially. IPIP capabilities range from support for multiple schemas and data models to support for distributed processing, configuration control, and data inventory management. IPIP exploits semantic commonality in features offered in various forms at different user interfaces in today's commercial systems. An integrated software architecture supports all user interfaces: programming languages, interactive data manipulation, and schema languages. This approach promotes simplicity and compactness in software and permits features to be offered symmetrically across all appropriate user interfaces.

Johnson, H. R.; Comfort, D. L.; Shull, D. D.

1980-01-01

375

Catalyzed gasification of biomass  

Microsoft Academic Search

Catalyzed biomass gasification studies are being conducted by Battelle's Pacific Northwest Laboratories. Investigations are being carried out concurrently at the bench and process development unit scales. These studies are designed to test the technical and economic feasibility of producing specific gaseous products from biomass by enhancing its reactivity and product specificity through the use of specific catalysts. The program is

L. J. Jr. Sealock; R. J. Robertus; L. K. Mudge; D. H. Mitchell; J. L. Cox

1978-01-01

376

SELECTION AND IN-HOUSE DEVELOPMENT OF SYSTEMS ENGINEERS.  

ERIC Educational Resources Information Center

PROCESS INDUSTRIES REQUIRE SYSTEMS ENGINEERS WHO CAN DESIGN, BUILD, AND IMPLEMENT A TOTAL SYSTEM OF INTERACTING COMPONENTS, WITH OR WITHOUT A DIGITAL COMPUTER. SINCE FEW COURSES ARE PROVIDED IN THIS DISCIPLINE, COMPANIES MUST DESIGN INPLANT PROGRAMS. TRAINEES MAY BE PH.D.S IN CONTROL ENGINEERING, PHYSICS, OR CHEMICAL ENGINEERING, RECENT GRADUATES…

MARDON, JASPER

377

The study of network teaching system development based software engineering  

Microsoft Academic Search

The network teaching system is an important area of modern information technology integration application also an important means of achieved information technology education. In this paper, the use of software engineering, combine the network of digital and traditional teaching software engineering to form a complete, scientific and effective software engineering network teaching system. And detail introduction general process of online

Wang Zongjiang

2010-01-01

378

Catalytic coal gasification for SNG manufacture  

NASA Astrophysics Data System (ADS)

The predevelopment phase of research on the Exxon catalytic coal gasification (CCG) process was completed in early 1978 and included bench-scale research on catalyst recovery and kinetics, the operation of a 6 in. diameter times 30 ft long fluid bed gasifier, and supporting engineering studies. As part of the engineering program, a conceptual design has been developed for a pioneer commercial CCG plant producing SNG from Illinois No. 6 bituminous coal. This paper reviews the status of research and development on the CCG program and describes the conceptual design and economics for the commercial scale CCG plant.

Gallagher, J. E., Jr.; Euker, C. A., Jr.

1980-06-01

379

SYSTEMS ENGINEERING CONCENTRATION Systems Engineering is an interdisciplinary approach and means to enable the realization of successful systems. It  

E-print Network

courses (5) ECE.09.402 Topics in ECE: Introduction to Systems Engineering ­ 3-credits MKT.09.375 Business Logistics ­ 3-credits CS.06.3xx Modeling and Simulation ­ 3-credits Any two of the following ­ ENGR.01.301 Junior Engineering Clinic I ­ 2-credits ENGR.01.302 Junior Engineering Clinic II ­ 2-credits ENGR.01

Rusu, Adrian

380

Embedded expert system for space shuttle main engine maintenance  

NASA Technical Reports Server (NTRS)

The SPARTA Embedded Expert System (SEES) is an intelligent health monitoring system that directs analysis by placing confidence factors on possible engine status and then recommends a course of action to an engineer or engine controller. The technique can prevent catastropic failures or costly rocket engine down time because of false alarms. Further, the SEES has potential as an on-board flight monitor for reusable rocket engine systems. The SEES methodology synergistically integrates vibration analysis, pattern recognition and communications theory techniques with an artificial intelligence technique - the Embedded Expert System (EES).

Pooley, J.; Thompson, W.; Homsley, T.; Teoh, W.; Jones, J.; Lewallen, P.

1987-01-01

381

Designing Engineering Systems for Sustainability Peter Sandborn and Jessica Myers  

E-print Network

6 Designing Engineering Systems for Sustainability Peter Sandborn and Jessica Myers CALCE, Department of Mechanical Engineering, University of Maryland Abstract Sustainability means keeping that satisfy the original requirements. Sustainability also includes manufacturing and fielding revised

Sandborn, Peter

382

Energy Efficient Engine: Control system component performance report  

NASA Technical Reports Server (NTRS)

An Energy Efficient Engine (E3) program was established to develop technology for improving the energy efficiency of future commercial transport aircraft engines. As part of this program, General Electric designed and tested a new engine. The design, fabrication, bench and engine testing of the Full Authority Digital Electronic Control (FADEC) system used for controlling the E3 Demonstrator Engine is described. The system design was based on many of the proven concepts and component designs used on the General Electric family of engines. One significant difference is the use of the FADEC in place of hydromechanical computation currently used.

Beitler, R. S.; Bennett, G. W.

1984-01-01

383

Control system for a gas turbine engine, especially a vehicular gas turbine engine  

Microsoft Academic Search

A control system is disclosed for a gas turbine engine, especially a vehicular gas turbine engine, having a speed governor responsive to a controlled variable which is the speed of a gas generator shaft for providing an output to control fuel flow to the engine, a temperature regulator device responsive to a controlled variable which is the gas temperature of

C. Greune; F. Hackl

1979-01-01

384

Surface gasification materials program. Semiannual progress report for the period ending September 30, 1983. [Mountain fuel resources  

SciTech Connect

The objective of the Surface Gasification Materials Program is to conduct research and development on materials for application to the specific needs of coal gasification systems. One of the goals of the program is to evaluate innovative fabrication methods which have the potential to lower costs and improve reliability and safety for gasifier vessels and components. Another goal is to conduct engineering-scale development and application of materials for coal gasification systems to ensure that the materials of construction for pilot plants and future large-scale plants can be properly selected and specified. Contents of this report are: (1) plant materials surveillance tests; (2) slagging gasifier refractories; (3) protective coatings and claddings; (4) ceramic fabrication/application technology; (5) ceramic application technology - brittle material design; (6) advanced pressure vessel materials technology; (7) electroslag component casting; (8) production and evaluation of electroslag castings; (9) cost reduction of the electroslag casting manufacturing process; (10) quantitative microstructural characterization of steel castings; (11) materials review and component failure analysis in support of coal gasification process and plants; and (12) process plant materials review, evaluation, and support.

Bradley, R.A.

1983-11-01

385

History of visual systems in the Systems Engineering Simulator  

NASA Technical Reports Server (NTRS)

The Systems Engineering Simulator (SES) houses a variety of real-time computer generated visual systems. The earliest machine dates from the mid-1960's and is one of the first real-time graphics systems in the world. The latest acquisition is the state-of-the-art Evans and Sutherland CT6. Between the span of time from the mid-1960's to the late 1980's, tremendous strides have been made in the real-time graphics world. These strides include advances in both software and hardware engineering. The purpose is to explore the history of the development of these real-time computer generated image systems from the first machine to the present. Hardware advances as well as software algorithm changes are presented. This history is not only quite interesting but also provides us with a perspective with which we can look backward and forward.

Christianson, David C.

1989-01-01

386

Computer aided system engineering for space construction  

NASA Technical Reports Server (NTRS)

This viewgraph presentation covers the following topics. Construction activities envisioned for the assembly of large platforms in space (as well as interplanetary spacecraft and bases on extraterrestrial surfaces) require computational tools that exceed the capability of conventional construction management programs. The Center for Space Construction is investigating the requirements for new computational tools and, at the same time, suggesting the expansion of graduate and undergraduate curricula to include proficiency in Computer Aided Engineering (CAE) though design courses and individual or team projects in advanced space systems design. In the center's research, special emphasis is placed on problems of constructability and of the interruptability of planned activity sequences to be carried out by crews operating under hostile environmental conditions. The departure point for the planned work is the acquisition of the MCAE I-DEAS software, developed by the Structural Dynamics Research Corporation (SDRC), and its expansion to the level of capability denoted by the acronym IDEAS**2 currently used for configuration maintenance on Space Station Freedom. In addition to improving proficiency in the use of I-DEAS and IDEAS**2, it is contemplated that new software modules will be developed to expand the architecture of IDEAS**2. Such modules will deal with those analyses that require the integration of a space platform's configuration with a breakdown of planned construction activities and with a failure modes analysis to support computer aided system engineering (CASE) applied to space construction.

Racheli, Ugo

1989-01-01

387

Cylinder blanking system for internal combustion engine  

SciTech Connect

This patent describes a cylinder de-activation system for an internal combustion engine of the type having a cylinder block with a turbo charger, multiple reciprocating pistons, a fuel system including fuel injectors operable between a first fuel injecting position and a second inoperative position, and a mechanism for moving the injectors between the first and second positions. It comprises first sensing means for sensing the turbo pressure as a first operating characteristic of the engine to produce a control signal when the turbo pressure is of a predetermined pre-established value; blanking means operatively associated with selected of the injectors having a first inoperative position and a second operative position which overrides the the mechanism upon receiving a control signal and maintains the selected injector in the second injector position whereby fuel flow to the cylinder associated with the injector is terminated; and timer means operably connected to the first sensing means to emit a control signal only if the turbo pressure is of a predetermined value for a predetermined period of time.

Thompson, L.L.

1992-04-21

388

Simultaneous high-temperature removal of alkali and particulates in a pressurized gasification system. Final technical progress report, April 1981-July 1983  

SciTech Connect

This program is directed at performing experimental and analytical investigations, deriving system designs, and estimating costs to ascertain the feasibility of using aluminosilicate-based getters for controlling alkali in pressurized gasification systems. Its overall objective is to develop a plan for evaluating a scaled-up version of the gettering process as a unit operation or as an integral part of a particulate removal device. This report describes work completed on the four technical program tasks: Thermodynamic projections; Getter Selection and Qualification; System Performance Projections; and Program Definition for Concept Scale-up during the 27-month contract performance period. Work completed on the thermodynamic projections includes a data base update, development of alkali phase diagrams, and system performance projections. Getter selection and qualification efforts involved over 70 kinetic studies in which a leading candidate getter - emathlite - was selected and characterized. System performance projections identified a packed-bed configuration containing relatively large getter pellets as the preferred contacting device for a full-scale unit. For emathlite, we concluded that full-scale unit bed heights of 2 m or less would be required if we assume annual replacement on the basis of bed saturation capacity. Concept scale-up work involved defining the hardware and test program requirements for further development of the emathlite packed-bed system. 56 references, 80 figures, 74 tables.

Mulik, P.R.; Alvin, M.A.; Bachovchin, D.M.

1983-09-01

389

Self-replicating systems: A systems engineering approach  

NASA Technical Reports Server (NTRS)

A first approach to conceptualize self-replicating systems was developed from past and present abstract theories. The engineering elements of self-replicating systems are defined in terms of a basic reference system. A number of options are investigated. The growth characteristics and their problems are analyzed, the mathematics of various exponential growth options are outlined, and the problems of universal parts production and systems closure are discussed. Selected areas of further study are defined and a 20 year development and demonstration program is presented.

Vontiesenhausen, G.; Darbro, W. A.

1980-01-01

390

Parallelization of Rocket Engine System Software (Press)  

NASA Technical Reports Server (NTRS)

The main goal is to assess parallelization requirements for the Rocket Engine Numeric Simulator (RENS) project which, aside from gathering information on liquid-propelled rocket engines and setting forth requirements, involve a large FORTRAN based package at NASA Lewis Research Center and TDK software developed by SUBR/UWF. The ultimate aim is to develop, test, integrate, and suitably deploy a family of software packages on various aspects and facets of rocket engines using liquid-propellants. At present, all project efforts by the funding agency, NASA Lewis Research Center, and the HBCU participants are disseminated over the internet using world wide web home pages. Considering obviously expensive methods of actual field trails, the benefits of software simulators are potentially enormous. When realized, these benefits will be analogous to those provided by numerous CAD/CAM packages and flight-training simulators. According to the overall task assignments, Hampton University's role is to collect all available software, place them in a common format, assess and evaluate, define interfaces, and provide integration. Most importantly, the HU's mission is to see to it that the real-time performance is assured. This involves source code translations, porting, and distribution. The porting will be done in two phases: First, place all software on Cray XMP platform using FORTRAN. After testing and evaluation on the Cray X-MP, the code will be translated to C + + and ported to the parallel nCUBE platform. At present, we are evaluating another option of distributed processing over local area networks using Sun NFS, Ethernet, TCP/IP. Considering the heterogeneous nature of the present software (e.g., first started as an expert system using LISP machines) which now involve FORTRAN code, the effort is expected to be quite challenging.

Cezzar, Ruknet

1996-01-01

391

The MSFC Systems Engineering Guide: An Overview and Plan  

NASA Technical Reports Server (NTRS)

This paper describes the guiding vision, progress to date and the plan forward for development of the Marshall Space Flight Center (MSFC) Systems Engineering Guide (SEG), a virtual systems engineering handbook and archive that describes the system engineering processes used by MSFC in the development of ongoing complex space systems such as the Ares launch vehicle and forthcoming ones as well. It is the intent of this website to be a "One Stop Shop' for MSFC systems engineers that will provide tutorial information, an overview of processes and procedures and links to assist system engineering with guidance and references, and provide an archive of relevant systems engineering artifacts produced by the many NASA projects developed and managed by MSFC over the years.

Shelby, Jerry; Thomas, L. Dale

2007-01-01

392

Acoustic velocity and attenuation measurements in thin rods with application to temperature profiling in coal gasification systems  

SciTech Connect

This paper is concerned with the application of ultrasonic thermometry for temperature profiling in the reactors of coal gasification plants. A temperature profiling sensor typically uses a thin rod with several notches to segregate the sensor length into various zones. An acoustic pulse transmitted through the multizone sensor is partially reflected back at each notch, and measurement of the time interval between each pair of the reflected signals provides an indication of the average temperature in the corresponding zone. The main contributions of this paper are (1) delineation of the reflection and transmission phenomenon of sound waves at a notch, (2) development of an improved method of attenuation measurement in single-zone and multizone sensors employing notches, and 3) determination of the acoustic properties, namely, velocity and attenuation of six candidate materials suitable to the gasifier environment in the temperature range from ambient to 1093/sup 0/C. Computer simulation was employed to analyze the reflected signals from the notches, and the simulation results were corroborated at each stage by experiments. 19 references, 6 figures, 2 tables.

Gopalsami, N.; Raptis, A.C.

1984-01-01

393

Cognitive engineering models in space systems  

NASA Technical Reports Server (NTRS)

NASA space systems, including mission operations on the ground and in space, are complex, dynamic, predominantly automated systems in which the human operator is a supervisory controller. Models of cognitive functions in complex systems are needed to describe human performance and form the theoretical basis of operator workstation design, including displays, controls, and decision aids. Currently, there several candidate modeling methodologies. They include the Rasmussen abstraction/aggregation hierarchy and decision ladder, the goal-means network, the problem behavior graph, and the operator function model. The research conducted under the sponsorship of this grant focuses on the extension of the theoretical structure of the operator function model and its application to NASA Johnson mission operations and space station applications. The initial portion of this research consists of two parts. The first is a series of technical exchanges between NASA Johnson and Georgia Tech researchers. The purpose is to identify candidate applications for the current operator function model; prospects include mission operations and the Data Management System Testbed. The second portion will address extensions of the operator function model to tailor it to the specific needs of Johnson applications. At this point, we have accomplished two things. During a series of conversations with JSC researchers, we have defined the technical goal of the research supported by this grant to be the structural definition of the operator function model and its computer implementation, OFMspert. Both the OFM and OFMspert have matured to the point that they require infrastructure to facilitate use by researchers not involved in the evolution of the tools. The second accomplishment this year was the identification of the Payload Deployment and Retrieval System (PDRS) as a candidate system for the case study. In conjunction with government and contractor personnel in the Human-Computer Interaction Lab, the PDRS was identified as the most accessible system for the demonstration. Pursuant to this a PDRS simulation was obtained from the HCIL and an initial knowledge engineering effort was conducted to understand the operator's tasks in the PDRS application. The preliminary results of the knowledge engineering effort and an initial formulation of an operator function model (OFM) are contained in the appendices.

Mitchell, Christine M.

1993-01-01

394

Data engineering systems: Computerized modeling and data bank capabilities for engineering analysis  

NASA Technical Reports Server (NTRS)

The Data Engineering System (DES) is a computer-based system that organizes technical data and provides automated mechanisms for storage, retrieval, and engineering analysis. The DES combines the benefits of a structured data base system with automated links to large-scale analysis codes. While the DES provides the user with many of the capabilities of a computer-aided design (CAD) system, the systems are actually quite different in several respects. A typical CAD system emphasizes interactive graphics capabilities and organizes data in a manner that optimizes these graphics. On the other hand, the DES is a computer-aided engineering system intended for the engineer who must operationally understand an existing or planned design or who desires to carry out additional technical analysis based on a particular design. The DES emphasizes data retrieval in a form that not only provides the engineer access to search and display the data but also links the data automatically with the computer analysis codes.

Kopp, H.; Trettau, R.; Zolotar, B.

1984-01-01

395

Engineering Software Suite Validates System Design  

NASA Technical Reports Server (NTRS)

EDAptive Computing Inc.'s (ECI) EDAstar engineering software tool suite, created to capture and validate system design requirements, was significantly funded by NASA's Ames Research Center through five Small Business Innovation Research (SBIR) contracts. These programs specifically developed Syscape, used to capture executable specifications of multi-disciplinary systems, and VectorGen, used to automatically generate tests to ensure system implementations meet specifications. According to the company, the VectorGen tests considerably reduce the time and effort required to validate implementation of components, thereby ensuring their safe and reliable operation. EDASHIELD, an additional product offering from ECI, can be used to diagnose, predict, and correct errors after a system has been deployed using EDASTAR -created models. Initial commercialization for EDASTAR included application by a large prime contractor in a military setting, and customers include various branches within the U.S. Department of Defense, industry giants like the Lockheed Martin Corporation, Science Applications International Corporation, and Ball Aerospace and Technologies Corporation, as well as NASA's Langley and Glenn Research Centers

2007-01-01

396

3F6 -Software Engineering and Design Concurrent Systems I  

E-print Network

· Second Life Operating System · Linux or Windows · Mobile phone Real time system · Process control system · Engine management system Applications · Microsoft Office Embedded system · Dishwasher · Video recorder Networks Distributed Systems/ Database Systems Operating Systems Real-time Systems Programs Communication

Young, Steve

397

IT Project Management and Systems Engineering Internship  

NASA Technical Reports Server (NTRS)

In the summer of 2009 I had the privilege of participating in the NASA INSPIRE program and during the summer of 2010 I was hired by ASRC Aerospace, a NASA contractor on the USTDC contract, as an Engineering Aide. These experiences combined inspired me to pursue a career in engineering and a goal to work as a NASA engineer and astronaut.

Cardamone, Lauren

2011-01-01

398

Exhaust gas recirculation system for internal combustion engines  

Microsoft Academic Search

An exhaust gas recirculation system for internal combustion engines comprises an exhaust gas recirculating passage for tapping engine exhaust gas from an exhaust pipe and feeding back to an engine intake pipe downstream of a throttle valve disposed therein, a control valve for opening and closing the recirculating passage in response to a pressure signal, and a throttle port formed

T. Kohama; H. Nohira; H. Obayashi; T. Ozaki

1980-01-01

399

Exhaust gas recirculation system for an internal combustion engine  

Microsoft Academic Search

An exhaust gas recirculation system for reducing nitrogen oxide emissions from automotive internal combustion engines is described in which the rate or amount of exhaust gases recirculated into the intake manifold of the engine is controlled in relation to the operating conditions of the engine. A device for supplying secondary air into the exhaust is also provided. An exhaust gas

Hayashi

1974-01-01

400

Improving Turbocharged Diesel Engine Operation with Turbo Power Assist System  

E-print Network

Improving Turbocharged Diesel Engine Operation with Turbo Power Assist System I. Kolmanovsky A. G Engineering, UC, Santa Barbara Abstract The paper investigates improvements in the tur- bocharged diesel problem. Comparison with a conventional turbocharged diesel engine reveals the mechanism by which

Stefanopoulou, Anna

401

A Kansei Engineering approach to a driver\\/vehicle system  

Microsoft Academic Search

In every process of car development, Kansei Engineering has turned out to be a good tool for adapting car products to the tastes or lifestyles of customers. Kansei Engineering approaches to car development have already been applied in some areas, for example, tuning the exhaust sound of a sports car. A Kansei Engineering approach to a driver\\/vehicle system is a

Akinori Horiguchi; Takamasa Suetomi

1995-01-01

402

Information recommendation method, recommendation engine, network system  

US Patent & Trademark Office Database

An information recommendation method, a recommendation engine, and a network system are disclosed in embodiments of the present invention. The method includes: acquiring a friend list of a user from a data source with a social relationship; acquiring a behavior record of a friend in the friend list of the user from a user behavior database; generating recommendation information matched with current behavior of the user, according to the behavior record of the friend in the friend list of the user and information of the current behavior of the user; and sending the recommendation information to an application website. Through the embodiments of the present invention, when information is recommended to a user, the recommendation information can be generated based on the social relationship and according to the behavior record of the friend of the user.

2014-08-19

403

Diagnostic systems in DEMO: Engineering design issues  

NASA Astrophysics Data System (ADS)

The diagnostic systems of DEMO that are mounted on or near the torus, whether intended for the monitoring and control functions of the engineering aspects or the physics behaviour of the machine, will have to be designed to suit the hostile nuclear environment. This will be necessary not just for their survival and correct functioning but also to satisfy the pertinent regulatory bodies, especially where any of them relate to machine protection or the prevention or mitigation of accidents foreseen in the safety case. This paper aims to indicate the more important of the reactor design considerations that are likely to apply to diagnostics for DEMO, drawn from experience on JET, the provisions in hand for ITER and modelling results for the wall erosion and neutron damage effects in DEMO.

Todd, T. N.

2014-08-01

404

Collaborative Systems Thinking: A Response to the Problems Faced by Systems Engineering's 'Middle Tier'  

NASA Technical Reports Server (NTRS)

Experienced systems engineers are adept at more than implementing systems engineering processes: they utilize systems thinking to solve complex engineering problems. Within the space industry demographics and economic pressures are reducing the number of experienced systems engineers that will be available in the future. Collaborative systems thinking within systems engineering teams is proposed as a way to integrate systems engineers of various experience levels to handle complex systems engineering challenges. This paper uses the GOES-R Program Systems Engineering team to illustrate the enablers and barriers to team level systems thinking and to identify ways in which performance could be improved. Ways NASA could expand its engineering training to promote team-level systems thinking are proposed.

Phfarr, Barbara B.; So, Maria M.; Lamb, Caroline Twomey; Rhodes, Donna H.

2009-01-01

405

MATERIALS AND SYSTEMS/SUSTAINABLE CIVIL ENGINEERING POSITIONS -The Department of Civil Engineering at the University of New Hampshire invites  

E-print Network

MATERIALS AND SYSTEMS/SUSTAINABLE CIVIL ENGINEERING POSITIONS - The Department of Civil Engineering level. The two positions, one in civil engineering Materials and one in Systems/Sustainable Engineering of resilient, adaptable and sustainable civil infrastructure. More information can be found at http://www.unh.edu/civil-engineering

New Hampshire, University of

406

Simultaneous high-temperature removal of alkali and particulates in a pressurized gasification system. Fifth quarterly project report, April 1982-June 1982. [Concentration of Na and K in gas at process conditions; also optimization of removal system  

SciTech Connect

This program is directed at performing experimental and analytical investigations, deriving system designs, and estimating costs to ascertain the feasibility of using aluminosilicate-based getters for controlling alkali in pressurized gasification systems. Its overall objective is to develop a comprehensive plan for evaluating a scaled-up version of the gettering process as a unit operation or as an integral part of a particulate removal device. This report briefly summarizes efforts previously completed on thermodynamic projections and system performance projections, together with current work on getter selection and qualification completed during the fifth quarter of the project. Work on the thermodynamic projections has been completed and includes an update of the data base, development of alkali phase diagrams, and projections for several gasification processes. Getter selection and qualification efforts involved four tests - two with activated bauxite and one each with diatomaceous earth and Novacite on the thermogravimetric analysis (TGA) system. Finally, system performance projections entailed examination of available kinetic data to ascertain the rate-controlling step, along with modeling efforts to determine the size requirements of a commercial-sized unit.

Mulik, P.R.; Alvin, M.A.; Bachovchin, D.M.

1982-07-01

407

Hydrogen production from co-gasification of coal and biomass in supercritical water by continuous flow thermal-catalytic reaction system  

Microsoft Academic Search

Hydrogen is a clean energy carrier. Converting abundant coal sources and green biomass energy into hydrogen effectively and\\u000a without any pollution promotes environmental protection. The co-gasification performance of coal and a model compound of biomass,\\u000a carboxymethylcellulose (CMC) in supercritical water (SCW), were investigated experimentally. The influences of temperature,\\u000a pressure and concentration on hydrogen production from co-gasification of coal and CMC

Qiuhui Yan; Liejin Guo; Xing Liang; Ximin Zhang

2007-01-01

408

Impact of knowledge-based software engineering on aerospace systems  

NASA Technical Reports Server (NTRS)

The emergence of knowledge engineering as a software technology will dramatically alter the use of software by expanding application areas across a wide spectrum of industries. The engineering and management of large aerospace software systems could benefit from a knowledge engineering approach. An understanding of this technology can potentially make significant improvements to the current practice of software engineering, and provide new insights into future development and support practices.

Peyton, Liem; Gersh, Mark A.; Swietek, Gregg

1991-01-01

409

Fixed-bed gasification research using US coals. Volume 11. Gasification of Minnesota peat. [Peat pellets and peat sods  

SciTech Connect

A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a coooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the eleventh volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of peat pellets and peat sods during 3 different test periods. 2 refs., 20 figs., 13 tabs.

Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

1985-05-01

410

Single-stage fluidized-bed gasification  

NASA Astrophysics Data System (ADS)

The single-stage fluidized-bed gasification process, in addition to being a simple system, maximizes gas production and allows the economic exploitation of small peat deposits. The objective of this gasification project is to conduct experiments in order to obtain data for designing a single-stage fluidized-bed gasifier, and to evaluate the economics of converting peat to synthesis gas and to SNG by this process. An existing high-temperature and high-pressure process development unit (PDU) was modified to permit the direct feeding of peat to the fluidized bed. Peat flows by gravity from the feed hopper through a 6-inch line to the screw-feeder conveyor. From there, it is fed to the bottom tee section of the reactor and transported into the gasification zone. Oxygen and steam are fed through a distributing ring into the reactor. Gasification reactions occur in the annulus formed by the reactor tube and a central standpipe. Peat ash is discharged from the reactor by overflowing into the standpipe and is collected in a solids receiver.

Lau, F. S.; Rue, D. M.; Weil, S. A.; Punwani, D. V.

1982-04-01

411

Modeling of catalytic char gasification  

SciTech Connect

A mathematical model is presented for catalytic char gasification where naturally occurring mineral impurities catalyse the gasification reactors. The model is based on a probabilistic description of the evolution of the catalytically active mineral surface during the gasification of a single char particle. An expression is obtained for the decay of the active surface area with carbon conversion which, in conjunction with an available pore structure model provides an excellent representation of experimental data. The model is also applied to the gasification of char particles impregnated with catalytically active salts, and model predictions again show good agreement with experimental data.

Reyes, S.; Jensen, K.F.

1984-05-01

412

Catalytic gasification of biomass  

NASA Astrophysics Data System (ADS)

Methane and methanol synthesis gas can be produced by steam gasification of biomass in the presence of appropriate catalysts. This concept is to use catalysts in a fluidized bed reactor which is heated indirectly. The objective is to determine the technical and economic feasibility of the concept. Technically the concept has been demonstrated on a 50 lb per hr scale. Potential advantages over conventional processes include: no oxygen plant is needed, little tar is produced so gas and water treatment are simplified, and yields and efficiencies are greater than obtained by conventional gasification. Economic studies for a plant processing 2000 T/per day dry wood show that the cost of methanol from wood by catalytic gasification is competitive with the current price of methanol. Similar studies show the cost of methane from wood is competitive with projected future costs of synthetic natural gas. When the plant capacity is decreased to 200 T per day dry wood, neither product is very attractive in today's market.

Robertus, R. J.; Mudge, L. K.; Sealock, L. J., Jr.; Mitchell, D. H.; Weber, S. L.

1981-12-01

413

System Engineering for the NNSA Knowledge Base  

NASA Astrophysics Data System (ADS)

To improve ground-based nuclear explosion monitoring capability, GNEM R&E (Ground-based Nuclear Explosion Monitoring Research & Engineering) researchers at the national laboratories have collected an extensive set of raw data products. These raw data are used to develop higher level products (e.g. 2D and 3D travel time models) to better characterize the Earth at regional scales. The processed products and selected portions of the raw data are stored in an archiving and access system known as the NNSA (National Nuclear Security Administration) Knowledge Base (KB), which is engineered to meet the requirements of operational monitoring authorities. At its core, the KB is a data archive, and the effectiveness of the KB is ultimately determined by the quality of the data content, but access to that content is completely controlled by the information system in which that content is embedded. Developing this system has been the task of Sandia National Laboratories (SNL), and in this paper we discuss some of the significant challenges we have faced and the solutions we have engineered. One of the biggest system challenges with raw data has been integrating database content from the various sources to yield an overall KB product that is comprehensive, thorough and validated, yet minimizes the amount of disk storage required. Researchers at different facilities often use the same data to develop their products, and this redundancy must be removed in the delivered KB, ideally without requiring any additional effort on the part of the researchers. Further, related data content must be grouped together for KB user convenience. Initially SNL used whatever tools were already available for these tasks, and did the other tasks manually. The ever-growing volume of KB data to be merged, as well as a need for more control of merging utilities, led SNL to develop our own java software package, consisting of a low- level database utility library upon which we have built several applications for specific tasks (e.g an event/origin merger; a waveform merger). Our package now includes applications for nearly all of the KB merging tasks, but development continues with an emphasis on improving user interfaces by adding GUIs and on increasing performance. Not all types of data products are well-suited to storage and access from a relational database, because of their basic underlying structure as well as the performance requirements for their use. In some cases, such products already have a standard format and corresponding software library in the existing monitoring system, but for others, this is not the case. For some of the latter, SNL has developed a large and complex C++ library for storing and accessing a wide variety of interpolatable geophysical data. Our library was first developed to support kriging of empirical data to provide value corrections and uncertainty estimates for underlying base models. Operational performance constraints led to the addition of an optimal tessellation capability to deliver kriging results using the much faster natural-neighbor interpolation method. To provide better predictions in areas without well-recorded seismicity, the library was further enhanced to provide the capability to use complex polygon delimited regional models as a base model for a single station/phase. Our latest work has focused on improving system performance and flexibility by running the library as a server application on a dedicated multi-processor server. This work was supported by the United States Department of Energy under Contract DE-AC04-94AL85000. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy.

Young, C.; Ballard, S.; Hipp, J.

2006-05-01

414

Engineering America's Future in Space: Systems Engineering Innovations for Sustainable Exploration  

NASA Technical Reports Server (NTRS)

This viewgraph presentation reviews systems engineering innovations for Ares I and Ares V launch vehicles. The contents include: 1) NASA's Exploratoin Roadmap; 2) Launch Vehicle Comparisons; 3) Designing the Ares I and Ares V in House; 4) Exploring the Moon; and 5) Systems Engineering Adds Value Throughout the Project Lifecycle.

Dumbacher, Daniel L.; Caruso, Pamela W.; Jones, Carl P.

2008-01-01

415

Internal combustion engine with an exhaust gas recirculation system  

Microsoft Academic Search

Disclosed is an internal combustion engine with an exhaust gas recirculation system. The engine is provided with a carburetor which includes a primary system and a secondary system. The recirculated exhaust gas is supplied to the intake passage via an exhaust gas supply pipe which is disposed at a position downstream of the carburetor. The top end of the exhaust

Saiki

1980-01-01

416

SYSTEMS ENGINEERING OF TIME-TRIGGERED ARCHITECTURES - THE SETTA APPROACH  

Microsoft Academic Search

SETTA addresses the systems engineering of safety-critical distributed real- time systems with a special focus on time-triggered architectures. An innovative meth- odology and a corresponding engineering environment is developed which aims for a higher maturity at early development steps. Key features are the support for a virtual systems integration and the tighter interconnection between the functional development process and the

C. Scheidler; P. Puschner; S. Boutin; E. Fuchs

2000-01-01

417

DISTRIBUTED COMPUTING SYSTEMS LABORATORY SCHOOL OF COMPUTER SCIENCE AND ENGINEERING  

E-print Network

DISTRIBUTED COMPUTING SYSTEMS LABORATORY SCHOOL OF COMPUTER SCIENCE AND ENGINEERING SEOUL NATIONAL://dcslab.snu.ac.kr/projects/mpichgf Heon Y. Yeom Namyoon Woo & Hyungsoo Jung Distributed Computing Systems Laboratory School of Computer SYSTEMS LABORATORY SCHOOL OF COMPUTER SCIENCE AND ENGINEERING SEOUL NATIONAL UNIVERSITY Introduction

Yeom, Heon Young

418

Exhaust gas recirculation system for an internal combustion engine  

Microsoft Academic Search

The disclosed engine exhaust gas recirculation (EGR) system has an EGR passage for recirculating exhaust gases from an exhaust system of an engine back into an intake system thereof downstream of a throttle valve. The EGR passage has a restriction orifice therein and an EGR control valve responsive to a vacuum signal to control the recirculation of exhaust gases through

T. Kohama; H. Obayashi; T. Ozaki; H. Nohira

1979-01-01

419

Benchmarking Music Information Retrieval Systems Department of Electronic Engineering  

E-print Network

Benchmarking Music Information Retrieval Systems Josh Reiss Department of Electronic Engineering and effective benchmarking system for music information retrieval (MIR) systems. This will serve the multiple surrounding retrieval of audio in test collections. 1. INTRODUCTION The Music Information Retrieval (MIR

Reiss, Josh

420

Energy recovery via mild gasification  

SciTech Connect

A mild gasification research process unit capable of processing up to one ton of coal per day has been constructed at UCC Research Corporation, Bristol, Virginia. The unit is very flexible utilizing coal preparation waste, bituminous, and subbituminous coal as feedstocks. The results, to date, have been encouraging, in that a high quality condensable hydrocarbon has been produced and a char produced which would be a desirable feed for a number of applications. The condensable hydrocarbons have applications as an additive for diesel and gasoline fuels, and either a boiler or turbine fuel. The char has a number of applications, such as in pulverized and/or fluidized-bed industrial and utility boilers, blast furnaces and foundary coke blending systems, and smokeless fuel systems. The facility became operational in November, 1985. The process description and data obtained, to date are described in this paper.

Wolfe, R.A.; Im, C.J.; Gillespie, B.L.; Ghate, M.R.

1986-09-01

421

Fixed-bed gasification research using US coals. Volume 9. Gasification of Elkhorn bituminous coal  

SciTech Connect

A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) group. This report is the ninth volume in a series of reports describing the atmospheric pressure, fixed-bed gasification of US coals. This specific report describes the gasification of Elkhorn bituminous coal. The period of gasificastion test was September 13 to October 12, 1983. 9 refs., 24 figs., 35 tabs.

Thimsen, D.; Maurer, R.E.; Pooler, A.R.; Pui, D.; Liu, B.; Kittelson, D.

1985-05-01

422

Boston University College of Engineering Division of Systems Engineering  

E-print Network

Control of Business EC/MS 573 Solar Energy Systems GRS GE 712 Regional Energy Modeling GRS EC 716 Game and Simulation, or EC 505 Stochastic Processes, or EK 500 Probability with Statistical Applications Semester/Semester/Grade ______________________________ Energy and Environmental Systems CAS EC 513 Game Theory SE/EC/ME 543 Sustainable Power Systems ME/MS 545

423

Boston University College of Engineering Division of Systems Engineering  

E-print Network

Control of Business ENG EC/MS 573 Solar Energy Systems GRS GE 712 Regional Energy Modeling GRS EC 716 Game with Statistical Applications Semester/Grade ______________________________ CONCENTRATION (Select two courses from Systems ENG SE/ME 740 Vision Robotics and Planning ENG SE/ME 762 Nonlinear Systems and Control C. Energy

424

Bio-Inspired Engineering of Exploration Systems  

NASA Technical Reports Server (NTRS)

The multidisciplinary concept of "bioinspired engineering of exploration systems" (BEES) is described, which is a guiding principle of the continuing effort to develop biomorphic explorers as reported in a number of articles in the past issues of NASA Tech Briefs. The intent of BEES is to distill from the principles found in successful nature-tested mechanisms of specific crucial functions that are hard to accomplish by conventional methods but that are accomplished rather deftly in nature by biological organisms. The intent is not just to mimic operational mechanisms found in a specific biological organism but to imbibe the salient principles from a variety of diverse bio-organisms for the desired crucial function. Thereby, we can build explorer systems that have specific capabilities endowed beyond nature, as they will possess a combination of the best nature-tested mechanisms for that particular function. The approach consists of selecting a crucial function, for example, flight or some selected aspects of flight, and develop an explorer that combines the principles of those specific attributes as seen in diverse flying species into one artificial entity. This will allow going beyond biology and achieving unprecedented capability and adaptability needed in encountering and exploring what is as yet unknown. A classification of biomorphic flyers into two main classes of surface and aerial explorers is illustrated in the figure, with examples of a variety of biological organisms that provide the inspiration in each respective subclass. Such biomorphic explorers may possess varied mobility modes: surface-roving, burrowing, hopping, hovering, or flying, to accomplish surface, subsurface, and aerial exploration. Preprogrammed for a specific function, they could serve as one-way communicating beacons, spread over the exploration site, autonomously looking for/at the targets of interest. In a hierarchical organization, these biomorphic explorers would report to the next level of exploration mode (say, a large conventional lander/rover) in the vicinity. A widespread and affordable exploration of new/hazardous sites at lower cost and risk would thus become possible by utilizing a faster aerial flyer to cover long ranges and deploying a variety of function- specific, smaller biomorphic explorers for distributed sensing and local sample acquisition. Several conceptual biomorphic missions for planetary and terrestrial exploration applications have been illustrated in "Surface-Launched Explorers for Reconnaissance/ Scouting" (NPO-20871), NASA Tech Briefs, Vol. 26, No. 4 (April, 2002), page 69 and "Bio-Inspired Engineering of Exploration Systems," Journal of Space Mission Architecture, Issue 2, Fall 2000, pages 49-79.

Thakoor, Sanita

2003-01-01

425

Market Assessment of Biomass Gasification and Combustion Technology for Small- and Medium-Scale Applications  

SciTech Connect

This report provides a market assessment of gasification and direct combustion technologies that use wood and agricultural resources to generate heat, power, or combined heat and power (CHP) for small- to medium-scale applications. It contains a brief overview of wood and agricultural resources in the U.S.; a description and discussion of gasification and combustion conversion technologies that utilize solid biomass to generate heat, power, and CHP; an assessment of the commercial status of gasification and combustion technologies; a summary of gasification and combustion system economics; a discussion of the market potential for small- to medium-scale gasification and combustion systems; and an inventory of direct combustion system suppliers and gasification technology companies. The report indicates that while direct combustion and close-coupled gasification boiler systems used to generate heat, power, or CHP are commercially available from a number of manufacturers, two-stage gasification systems are largely in development, with a number of technologies currently in demonstration. The report also cites the need for a searchable, comprehensive database of operating combustion and gasification systems that generate heat, power, or CHP built in the U.S., as well as a national assessment of the market potential for the systems.

Peterson, D.; Haase, S.

2009-07-01

426

Development of the Engineering Test Satellite-3 (ETS-3) ion engine system  

NASA Technical Reports Server (NTRS)

The ion engine system onboard the ETS-3 is discussed. The system consists of two electron bombardment type mercury ion engines with 2 mN thrust and 2,000 sec specific impulse and a power conditioner with automatic control functions. The research and development of the system, development of its EM, PM and FM, the system test and the technical achievements leading up to final launch are discussed.

Kitamura, S.

1984-01-01

427

Gasification of various coals in molten salts  

SciTech Connect

The utilization of the US coal reserves in a manner which does not add to the existing pollution problem is of utmost importance in the interest of conservation of more valuable natural resources in the national economy. Gasification of coal and generation of clean fuel gas offers one of the most promising approaches to the utilization of coal. It has been assigned a high priority in the US Energy Development Program. Several of the coal gasification processes presently under development are now at the initial pilot plant operation stage. One of these processes is the Rockwell International Molten Salt Coal Gasification Process (Rockgas Process). In this process, the coal is gasified at a temperature of about 1800/sup 0/F and at pressures up to 30 atm by reaction with air in a highly turbulent mixture of molten sodium carbonate containing sodium sulfide, ash, and unreacted carbonaceous material. The sulfur and ash of the coal are retained in the melt, a small stream of which is continuously circulated through a process system for regeneration of the sodium carbonate, removal of the ash, and recovery of elemental sulfur. A molten salt coal gasification process development unit capable of converting 1 ton of coal per hour into low-Btu fuel gas at pressures up to 20 atm is currently undergoing testing under contract to the Department of Energy. Preliminary to the PDU, a considerable amount of laboratory testing took place. These tests were conducted in a bench-scale, 6-in.-dia gasifier in which coals of different rank were continuously gasified in the melt. The tests resulted in a better understanding of the gasification process. The purpose of this paper is to describe these laboratory tests and to discuss some of the chemistry taking place in the gasifier. Emphasis is placed on the effect of coal rank on the chemistry.

Yosim, S.J.; Barclay, K.M.

1980-01-01

428

Thermal and Environmental Barrier Coatings for Advanced Propulsion Engine Systems  

NASA Technical Reports Server (NTRS)

Ceramic thermal and environmental barrier coatings (TEBCs) are used in gas turbine engines to protect engine hot-section components in the harsh combustion environments, and extend component lifetimes. For future high performance engines, the development of advanced ceramic barrier coating systems will allow these coatings to be used to simultaneously increase engine operating temperature and reduce cooling requirements, thereby leading to significant improvements in engine power density and efficiency. In order to meet future engine performance and reliability requirements, the coating systems must be designed with increased high temperature stability, lower thermal conductivity, and improved thermal stress and erosion resistance. In this paper, ceramic coating design and testing considerations will be described for high temperature and high-heat-flux engine applications in hot corrosion and oxidation, erosion, and combustion water vapor environments. Further coating performance and life improvements will be expected by utilizing advanced coating architecture design, composition optimization, and improved processing techniques, in conjunction with modeling and design tools.

Zhu, Dong-Ming; Miller, Robert A.

2004-01-01

429

Aerospike Engine Post-Test Diagnostic System Delivered to Rocketdyne  

NASA Technical Reports Server (NTRS)

The NASA Glenn Research Center at Lewis Field, in cooperation with Rocketdyne, has designed, developed, and implemented an automated Post-Test Diagnostic System (PTDS) for the X-33 linear aerospike engine. The PTDS was developed to reduce analysis time and to increase the accuracy and repeatability of rocket engine ground test fire and flight data analysis. This diagnostic system provides a fast, consistent, first-pass data analysis, thereby aiding engineers who are responsible for detecting and diagnosing engine anomalies from sensor data. It uses analytical methods modeled after the analysis strategies used by engineers. Glenn delivered the first version of PTDS in September of 1998 to support testing of the engine s power pack assembly. The system was used to analyze all 17 power pack tests and assisted Rocketdyne engineers in troubleshooting both data acquisition and test article anomalies. The engine version of PTDS, which was delivered in June of 1999, will support all single-engine, dual-engine, and flight firings of the aerospike engine.

Meyer, Claudia M.

2000-01-01

430

Engine having a high pressure hydraulic system and low pressure lubricating system  

DOEpatents

An engine includes a high pressure hydraulic system having a high pressure pump and at least one hydraulically-actuated device attached to an engine housing. A low pressure engine lubricating system is attached to the engine housing and includes a circulation conduit fluidly connected to an outlet from the high pressure pump.

Bartley, Bradley E. (Manito, IL); Blass, James R. (Bloomington, IL); Gibson, Dennis H. (Chillicothe, IL)

2000-01-01

431

Exhaust-gas-recirculation system for use in diesel engines  

Microsoft Academic Search

An exhaust-gas-recirculation system is disclosed for use in diesel engines, having a valve member adapted to control the flow rate of the exhaust gas recirculated from the exhaust pipe to the intake pipe of the diesel engine. The exhaust-gas-recirculation system has a fly-weight rotatable in synchronization with the engine to produce a centrifugal force, a governor sleeve displaceable in response

K. Matsui; T. Miyazaki; E. Nomura; H. Sami; T. Ueda

1981-01-01

432

Data systems and computer science: Software Engineering Program  

NASA Technical Reports Server (NTRS)

An external review of the Integrated Technology Plan for the Civil Space Program is presented. This review is specifically concerned with the Software Engineering Program. The goals of the Software Engineering Program are as follows: (1) improve NASA's ability to manage development, operation, and maintenance of complex software systems; (2) decrease NASA's cost and risk in engineering complex software systems; and (3) provide technology to assure safety and reliability of software in mission critical applications.

Zygielbaum, Arthur I.

1991-01-01

433

Probabilistic simulation of concurrent engineering of propulsion systems  

NASA Technical Reports Server (NTRS)

Technology readiness and the available infrastructure is assessed for timely computational simulation of concurrent engineering for propulsion systems. Results for initial coupled multidisciplinary, fabrication-process, and system simulators are presented including uncertainties inherent in various facets of engineering processes. An approach is outlined for computationally formalizing the concurrent engineering process from cradle-to-grave via discipline dedicated workstations linked with a common database.

Chamis, C. C.; Singhal, S. N.

1993-01-01

434

Systems Engineering Education Based on Evolutional Project-Based Learning  

NASA Astrophysics Data System (ADS)

The knowledge and skills in systems engineering including project management are necessary for engineers who are engaged in planning and developing systems. Experiences of project execution are necessary for understanding systems engineering. Challenge is how to teach systems engineering to students who have scarce project experiences. In the education, giving the experience including a real experience and a pseudo-experience will be indispensable. In this paper, systems engineering education by evolutional Project-Based Learning (PBL) is designed and evaluated. In curriculum, exercises and lectures are executed alternately and evolutionally in three steps of PBLs ; Workshop of System Thinking, mathematical knowledge and technique are delivered in the first step PBL. Techniques of systems engineering are provided in the second step PBL. Finally project management is obtained in the third step PBL. Execution and evaluation of the education show that the Evolutional Project-Based Learning of systems engineering is effective not only to improve knowledge and experience of students but also to motivate students to study systems engineering.

Inoue, Masahiro; Hasegawa, Hiroshi

435

Non-Toxic Orbital Maneuvering System Engine Development  

NASA Technical Reports Server (NTRS)

Recent results using the Aestus engine operated with LOx/ethanol propellant are presented. An experimental program at Rocketdyne Propulsion and Power is underway to adapt this engine for the Boeing Reusable Space Systems Division non-toxic Orbital Maneuvering System/Reaction control System (OMS/RCS) system. Daimler-Chrysler Aerospace designed the Aestus as an nitrogen tetroxide/monomethyl hydrazine (NTO/MMH) upper-stage engine for the Ariane 5. The non-toxic OMS/RCS system's preliminary design requires a LOx/ethanol (O2/C2H5OH) engine that operates with a mixture ratio of 1.8, a specific impulse of 323 seconds, and fits within the original OMS design envelope. This paper describes current efforts to meet these requirements including, investigating engine performance using LOx/ethanol, developing the en-ine system sizing package, and meeting the vehicle operation parameters. Data from hot-fire testing are also presented and discussed.

Green, Christopher; Claflin, Scott; Maeding, Chris; Butas, John

1999-01-01

436

Diesel engine exhaust gas recirculation system with greater atmospheric pressure compensation at low engine load  

Microsoft Academic Search

An exhaust gas recirculation system is described for a diesel engine for a vehicle utilizing an air intake system and an exhaust system including: (a) an exhaust gas recirculation passage a downstream and of which is connected to the exhaust system and an upstream end of which is connected to the air intake system, so as to recirculate exhaust gas

M. Kawagoe; O. Hishinuma

1986-01-01

437

Engine exhaust gas recirculation control system  

Microsoft Academic Search

A restriction is formed in a branch passage of the exhaust gas passageway of an engine having a plurality of combustion chambers , which passage communicates at its upstream end with only a part of the combustion chambers of the engine, to divide the branch passage into upstream and downstream sections, and the egr passageway connects the upstream section and

Aoyama

1980-01-01

438

A framework for implementing systems engineering development of complex systems  

NASA Astrophysics Data System (ADS)

The Department of Defense and the aerospace industry are responsible for decades of successful implementation of systems engineering process models used for the development of complex systems. The process models implemented throughout acquisition life cycles have proven to be comprehensive and flexible, and hence are designed to reduce acquisition schedule variability and the inherent risks of life-cycle cost overruns. While implementing the appropriate process model is important, various process models do not evaluate and quantify potential technical, manufacturing, scheduling and cost risks that may impact acquisition activities throughout the acquisition life cycle of the complex system. A potential way to effectively manage these risks with the appropriate process model is through the incorporation of the Synthesized Framework , the proposed method developed in this dissertation. With the described Synthesized Framework (SF), process models and risk drivers can be analyzed using this comprehensive approach, which implements qualitative and quantitative risk analysis techniques through Monte Carlo simulation. The result is a repeatable, inherent, risk-driven commitment process that can stabilize and synchronize both systems engineering and acquisition processes.

Brunson, Karl Leonard

439

Space shuttle engineering and operations support. Avionics system engineering  

NASA Technical Reports Server (NTRS)

The shuttle avionics integration laboratory (SAIL) requirements for supporting the Spacelab/orbiter avionics verification process are defined. The principal topics are a Spacelab avionics hardware assessment, test operations center/electronic systems test laboratory (TOC/ESL) data processing requirements definition, SAIL (Building 16) payload accommodations study, and projected funding and test scheduling. Because of the complex nature of the Spacelab/orbiter computer systems, the PCM data link, and the high rate digital data system hardware/software relationships, early avionics interface verification is required. The SAIL is a prime candidate test location to accomplish this early avionics verification.

Broome, P. A.; Neubaur, R. J.; Welsh, R. T.

1976-01-01

440

The Control System for the X-33 Linear Aerospike Engine  

NASA Technical Reports Server (NTRS)

The linear aerospike engine is being developed for single-stage -to-orbit (SSTO) applications. The primary advantages of a linear aerospike engine over a conventional bell nozzle engine include altitude compensation, which provides enhanced performance, and lower vehicle weight resulting from the integration of the engine into the vehicle structure. A feature of this integration is the ability to provide thrust vector control (TVC) by differential throttling of the engine combustion elements, rather than the more conventional approach of gimballing the entire engine. An analysis of the X-33 flight trajectories has shown that it is necessary to provide +/- 15% roll, pitch and yaw TVC authority with an optional capability of +/- 30% pitch at select times during the mission. The TVC performance requirements for X-33 engine became a major driver in the design of the engine control system. The thrust level of the X-33 engine as well as the amount of TVC are managed by a control system which consists of electronic, instrumentation, propellant valves, electro-mechanical actuators, spark igniters, and harnesses. The engine control system is responsible for the thrust control, mixture ratio control, thrust vector control, engine health monitoring, and communication to the vehicle during all operational modes of the engine (checkout, pre-start, start, main-stage, shutdown and post shutdown). The methodology for thrust vector control, the health monitoring approach which includes failure detection, isolation, and response, and the basic control system design are the topic of this paper. As an additional point of interest a brief description of the X-33 engine system will be included in this paper.

Jackson, Jerry E.; Espenschied, Erich; Klop, Jeffrey

1998-01-01

441

Internal combustion engine having exhaust gas recirculation system  

Microsoft Academic Search

An internal combustion engine has an exhaust gas recirculation system including a recirculation valve for controlling the amount of exhaust gas returned to the intake system. The position or opening of the valve is controlled to a desired position in accordance with a memory in a memory device storing desired valve positions under various combinations of the engine load and

K. Iida; K. Okazaki; Y. Yada

1983-01-01

442

Exhaust gas recirculation system for internal combustion engine  

Microsoft Academic Search

An exhaust gas recirculation system for an internal combustion engine for automotive use is disclosed, wherein a diaphragm-operated recirculation rate control valve adapted to control the exhaust gas recirculation rate depending upon the relationship between the pressure of the exhaust gases passed through an orifice and a vacuum developed in the mixture supply system of the engine is used in

T. Yano; H. Yuzawa

1981-01-01

443

Daniel J. Epstein Department of Industrial & Systems Engineering  

E-print Network

National Systems Engineering Research Center The Department of Defense (DoD) and an agency in the Intelligence Community have awarded the nation's first University Affiliated Research Center (UARC) focused on systems engineering to an 18-member consortium led by USC and the Stevens Institute of Technology

Zhou, Chongwu

444

Roadmap: Engineering Technology Mechanical/Systems Bachelor of Science  

E-print Network

Roadmap: Engineering Technology ­ Mechanical/Systems ­ Bachelor of Science [RE;Roadmap: Engineering Technology ­ Mechanical/Systems ­ Bachelor of Science [RE-BS-ENGT-MSY] Regional-BS-ENGT-MSY] Regional College Catalog Year: 2013-2014 Page 1 of 4 | Last Updated: 9-Apr-13/LNHD This roadmap

Khan, Javed I.

445

Exhaust gas recirculation system in an internal combustion engine  

Microsoft Academic Search

This application discloses an exhaust gas recirculation system in an internal combustion engine. The system is comprise of: (1) an EGR pipe which interconnects an exhaust pipe and an intake pipe of the engine; (2) an EGR valve mounted of the EFR pipe; (3) an EGR cooler mounted on the EGR pipe upstream of said EGR valve; (4) a by-pass

Nagano

1979-01-01

446

CIRES/GSD Professional Research Assistant Sr. HPC Systems Engineer  

E-print Network

CIRES/GSD Professional Research Assistant Sr. HPC Systems Engineer The Cooperative Institute. The program provides HPC resources throughout NOAA and to our partners. NOAA's HPC assets are distributed of GSD is looking for a temporary (12 mo) full-time Sr. High Performance Computing (HPC) System Engineer

Colorado at Boulder, University of

447

The exploitation of neural networks in automotive engine management systems  

Microsoft Academic Search

The use of electronic engine control systems on spark ignition engines has enabled a high degree of performance optimisation to be achieved. The range of functions performed by these systems, and the level of performance demanded, is rising and thus so are development times and costs. Neural networks have attracted attention as having the potential to simplify software development and

P. J. Shayler; M. Goodman; T. Ma

2000-01-01