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1

Innovative private micro-hydro power development in Rwanda  

Microsoft Academic Search

Under the “Private Sector Participation in Micro-Hydro Development Project in Rwanda”, four newly registered Rwandan companies are each constructing a micro-hydro electricity plant (100–500kW) and building a low-voltage distribution grid. These companies financed their plants through their own equity and debt with support from the PSP Hydro project. This support comprised a subsidy of 30–50% of investment costs, technical and

Maurice Pigaht; Robert J. van der Plas

2009-01-01

2

Multiple purpose micro hydro electric power station  

Microsoft Academic Search

One presents the calculus of a micro hydro-electric power station, long ago dreamed by our former famous professor Dorin Pavel, from the Politehnica University in Bucharest, PUB; we decided as a proper location for this micro hydro power plant MHPP in discussion to be arranged nearby the PUB, on the Ciurel Dam at the Lake Morii site, located on the

D. B. Guzun; M. D. Cazacu; N. Nistor; R. Guzun

2007-01-01

3

Basic design aspects of micro hydro power plant and its potential development in Malaysia  

Microsoft Academic Search

Hydro power plants convert potential energy of water into electricity. It is a clean source of energy .The water after generating electrical power is available for irrigation and other purposes. The first use of moving water to produce electricity was a waterwheel on the Fox River in Wisconsin in 1882. Hydropower continued to play a major role in the expansion

M. Mohibullah; A. M. Radzi; M. I. A. Hakim

2004-01-01

4

A simplified propeller turbine runner design for stand alone micro-hydro power generation units  

Microsoft Academic Search

In most developing countries, the vast majority of potential micro-hydro power generation sites, i.e. with power outputs up to 100kW, are found in areas with high rainfall or extensive irrigation works with small canal drops. These sites, where the available head does not exceed 5m, are usually referred to as low head sites. The present paper introduces a simplified design

G. M. Demetriades; A. A. Williams; N. P. A. Smith

1996-01-01

5

Study of a grid-connected hybrid wind\\/micro-hydro power system  

Microsoft Academic Search

This paper reports on experimental results for a hybrid wind\\/micro hydro power system connected to the grid. It comprises, on one side, a doubly-fed induction generator linked mechanically and electrically (through back-to-back power electronic converters in the rotor circuit) to a permanent- magnet synchronous machine, which may recover or supply the slip power, and, on the other side, a fixed-

Stefan BREBAN; Mehdi NASSER; Arnaud VERGNOL; Vincent COURTECUISSE; Benoît ROBYNS; Mircea M. RADULESCU

2008-01-01

6

Study of a grid-connected hybrid wind\\/micro-hydro power system associated with a supercapacitor energy storage device  

Microsoft Academic Search

This paper reports on experimental results for a grid-connected hybrid wind\\/micro-hydro power system associated with a supercapacitor energy storage device (SCESD). It comprises a doubly-fed induction generator linked mechanically and electrically (through back-to-back power electronic converters in the rotor circuit) to a permanent magnet synchronous machine, which may recover or supply the slip power. The SCESD is connected via a

Stefan BREBAN; Benoît ROBYNS; Mircea M. RADULESCU

2010-01-01

7

Decentralized Micro-hydro Energy Systems in Nepal: En Route to Sustainable Energy Development  

Microsoft Academic Search

At present, 85 percent of Nepalese people live in remote areas with limited access to energy except fuel wood and other biomass for their energy source. This article examines the sustainable energy projects, considering socioeconomic conditions of the country. In this study, it is revealed that micro-hydro operations in remote\\/isolated areas are considered to be one of the most feasible

G. R. Pokharel; A. B. Chhetri; M. I. Khan; M. R. Islam

2008-01-01

8

Techno-economics of micro-hydro projects for decentralized power supply in India  

Microsoft Academic Search

Results of a techno-economic feasibility evaluation of few micro-hydropower (MHP) projects being planned and implemented for decentralized power supply for remote locations in India are presented. The capital cost of such projects (including cost of power evacuation and distribution system), cost per unit of rated capacity, and relative cost of different sub-systems of MHP projects in the capacity range of

M. R. Nouni; S. C. Mullick; T. C. Kandpal

2006-01-01

9

Cumulative Effects of Micro-Hydro Development on the Fisheries of the Swan River Drainage, Montana, First Annual Progress Report (Covering Field Season July-November 1982).  

SciTech Connect

This fisheries study is to determine the potential cumulative biological and economic effects of 20 small or micro-hydro-electric facilities (less than 5 megawatts) proposed to be constructed on tributaries to the Swan River, a 1738 square kilometer (671 square mile) drainage located in northwestern Montana. The study addresses portions of measure 1204 (b) (2) of the Norwthwest Power Planning Council's Columbia River Basin Fish and Wildlife Program. Aerial pre-surveys conducted during 1982 identified 102 stream reaches that may support fish populations in the Swan drainage between Swan and Lindbergh lakes. These reaches were located in 49 tributary streams and constituted 416 kilometers (258 miles) of potential fish habitat. Construction of all proposed small hydro projects would divert water from 54 kilometers (34 miles) or about 13 percent of the tributary system. Only two of the 20 proposed hydro sites did not support trout populations and most were populated by migratory bull trout and westslope cutthroat trout. Potential cumulative habitat losses that could result from dewatering of all proposed project areas were predicted using a stream reach classification scheme involving stream gradient, drainage ara, and fish population data. Preliminary results of this worst case analysis indicate that 23, 19 and 6 percent of the high quality rearing habitat for cutthroat, bull, and brook trout respectively would be lost.

Leathe, Stephen A.; Graham, Patrick J.

1984-03-01

10

Cumulative Effects of Micro-Hydro Development on the Fisheries of the Swan River Drainage, Montana, Volume I, Summary, 1983-1984 Final Report.  

SciTech Connect

This study was designed to develop and apply methods to evaluate the cumulative effects of 20 proposed small hydro projects on the fisheries resources of the Swan River drainage located in northwestern Montana. Fish population and reach classification information was used to estimate total populations of 107,000 brook trout, 65,000 cut-throat trout and 31,000 juvenile bull trout within the tributary system. Distribution, abundance, and life history of fish species in the drainage and their contribution to the sport fishery were considered in the cumulative impact analysis. Bull trout were chosen as the primary species of concern because of their extensive use of project areas, sensitivity to streambed sedimentation, and their importance to the lake and river sport fisheries. Dewatering of hydroelectric diversion zones and streambed sedimentation (resulting from forest and small hydro development) were the major impacts considered. The developer proposed to divert up to the entire streamflow during low flow months because maintenance of recommended minimum bypass flows would not allow profitable project operation. Dewatering was assumed to result in a total loss of fish production in these areas. 105 refs., 19 figs., 38 tabs.

Leathe, Stephen A.; Enk, Michael D.

1985-04-01

11

Cumulative Effects of Micro-Hydro Development on the Fisheries of the Swan River Drainage, Montana, Volume III, Fish and Habitat Inventory of Tributary Streams, 1983-1984 Final Report.  

SciTech Connect

This report summarizes a study of the fisheries of the Swan River drainage in relation to potential small hydro development. This information was collected in order to obtain a reliable basin-wide database which was used to evaluate the potential cumulative effects of a number of proposed small hydro developments on the fisheries of the drainage. For each named tributary stream there is a reach-by-reach narrative summary of general habitat characteristics, outstanding features of the stream, and fish populations and spawning use. An attempt was made to rank many of the measured parameters relative to other surveyed stream reaches in the drainage. 3 refs.

Leathe, Stephen A.

1985-03-01

12

HYBRID APPROACH FOR DESIGNING SUSTAINABLE POWER GENERATION SYSTEM IN OFF-GRID ISLAND AREA  

Microsoft Academic Search

For power generation in off-grid island area, hybrid approach with micro-grids is a good solution. Using a combination of photovoltaic modules, micro-hydro, solar thermal, diesel generator, storage devices and power conditioning systems can develop hybrid power system. The work as a whole is included resource assessment techniques, load analysis for an assumed load curve and optimisation of the different components

Saiful ISLAM; Johan DRIESEN; Ronnie BELMANS

13

Simulations of Blade Angle Effects on EGAT-Micro Hydro Turbine  

NASA Astrophysics Data System (ADS)

Following the feasibility study of design phase of EGAT (Electricity Generating Authority of Thailand) in-house micro hydro bulb turbine at Huai Kum Dam drainage pipeline from the reservoir for irrigation, the simulation of blade angle effects had been performed. In this case study, the turbine was designed at the average head of 21 m and water flow rate of 0.424 m3/s. The simulation was conducted in order to study of the effects of blade angle on the fluid flow for this specific case. The LES turbulence model under the practical condition of unsteady flow and incompressible fluid at Huai Kum Dam was investigated. The rotating blades effect the change in pressure and momentum which depend on head and flow rate of fluid. The research studied pressure and velocity of fluid flow on blades solving the pre-design for the improvement of hydro turbine efficiency. The computational Fluid Dynamics (CFD) was used to simulate the pressure and velocity distributions on blades of hydro bulb turbine which consists of five-blade runner and rotates at 980 rpm by using Fluent Software. The model was set at the blade twist angle of 25o and blade camber angle of 32o and then adjusted the guide vane angle to 60o, 65o and 70o respectively for comparing the maximum and minimum pressure on both sides of the blades as well as the corresponding efficiency. The results have shown that by setting guide vane angle to 60o, 65o and 70o, the maximum pressure, located at the leading edge of pressure side, are 213 kPa, 217 kPa and 207 kPa and the minimum pressure, located at the leading edge of suction side are -473 kPa, -465 kPa, and -581 kPa respectively. The flow profiles of pressure, velocity and stream line showed the guidelines of better blade angle comparisons. The maximum efficiency of hydro bulb turbine found in this study was 67.8% at blade angle of 32o and guide vane of 60o. This case study will be further investigated on the blade design for the improvement of the turbine efficiency before finalized the post-design.

Nuantong, Weerapon; Taechajedcadarungsri, Sirivit

2010-06-01

14

Micro hydroelectric power stations  

Microsoft Academic Search

This book is a concise, comprehensive presentation of all aspects of hydro-power exploitation using micro-power stations. It offers engineers guidance to techniques for assessing the power available from a given stream, designing and building siteworks, selecting the appropriate turbine types for given conditions, and measuring and controlling environmental hazards associated with micro-hydro installations.

L. Monition; L. LeNir; J. Roux

1985-01-01

15

Low head, micro-hydro demonstration project, Coker, Alabama. Final report  

SciTech Connect

Project objective was to demonstrate the feasibility of using a crossflow (Banki) turbine in a low head, run-of-steam application. Project consisted of construction of small dam across Big Creek at Coker, Alabama. Design, construction and installation of a crossflow turbine with appurtenant feed water structures and control devices. Design of crossflow turbine was for 6 ft net head at 15 cubic ft per second flow. Dimensions of turbine constructed were: diameter 19'', length 72'', No. of blades - 20. Jet thickness (nozzle opening) 1.25'' with calculated full flow rpm of 117. Construction was started in summer of 1981 and completed in September 1981. Before any meaningful information could be gained the dam was demolished by flood. The dam was rebuilt during the summer of 1982. Preliminary testing, using a 8 kW Dayton ac Generator with gear box (input rpm 540) indicated a peak power output at full flow of 2.8 kW as opposed to calculated 7 kW at 75% efficiency for the system. This testing was done in November and December of 1982 under extremely difficult conditions which included destruction of the turbine blades by debris pushed into high backwater. Due to frequent and heavy rains during the winter of 1983 no testing was possible in January and February. In March 1983 the dam was lost again due to severe flooding conditions eroding away the end of the dam. The project will be rebuilt at some future time when funds become available.

Simpson, B.J.

1983-09-01

16

MINI\\/MICRO HYDRO ELECTRIC POWER GENERATION USING AN AXIALLY LAMINATED ANISOTROPIC SELF-EXCITED RELUCTANCE GENERATOR  

Microsoft Academic Search

Energy is key input to drive and improve the life cycle. Due to depletion of fossils fuel, the main source of energy, strongly suggests that harnessing of non conventional, renewable and environment friendly energy resources is vital for steering the global energy supply towards a sustainable path. Mini\\/micro hydropower is a form of non-depleting, self-replenishing energy that can be harnessed

AJAY SRIVASTAVA; S. K. GOEL; RAVI SAXENA; GEETA NEGI

17

Power systems development facility.  

National Technical Information Service (NTIS)

This report discusses the commissioning and operation of the transport reactor train and associated balance-of-plant equipment at the Power Systems Development Facility (PSDF) located in Wilsonville, Alabama. The transport reactor is an advanced circulati...

1998-01-01

18

Heatpipe power system development  

SciTech Connect

This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective of the project was to develop a design approach that could enable the development of near-term, low-cost, space fission-power systems. Sixteen desired attributes were identified for such systems and detailed analyses were performed to verify that they are feasible. Preliminary design work was performed on one concept, the Heatpipe Power system (HPS). As a direct result of this project, funding was obtained from the National Aeronautics and Space Administration to build and test an HPS module. The module tests went well, and they now have funding to build a bimodal module.

Houts, M.G.; Poston, D.I.

1998-12-31

19

China opts for small-scale energy techniques. [Micro hydro plants, small coal mines, methane from organic wastes  

Microsoft Academic Search

China, the largest of the developing countries, has adopted the intermediate technology approach to provide its basic energy supply. The dictum of the Chinese economy since the later 1950s has been not only developing large modern enterprises but also small projects in the rural areas. The advantages of the intermediate approach lie in an extensive use of plentiful and cheap

Smil

1976-01-01

20

Designs and applications for floating-hydro power systems in small streams  

Microsoft Academic Search

The project focuses on an appropriate technology for small-scale hydro power: floating waterwheels and turbines. For background, relic and existing systems such as early floating mills, traditional Amish waterwheels, and micro-hydro systems are examined. In the design phase of the project, new designs for Floating Hydro Power Systems include: an analysis of floatation materials and systems; a floating undershot waterwheel

Rehder

1983-01-01

21

POWER SYSTEMS DEVELOPMENT FACILITY  

SciTech Connect

This report discusses test campaign GCT4 of the Kellogg Brown & Root, Inc. (KBR) transport reactor 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 reactor is an advanced circulating fluidized-bed reactor designed to operate as either a combustor or a gasifier using one of two possible particulate control devices (PCDs). The transport reactor was operated as a pressurized gasifier during GCT4. GCT4 was planned as a 250-hour test run to continue characterization of the transport reactor using a blend of several Powder River Basin (PRB) coals and Bucyrus limestone from Ohio. The primary test objectives were: Operational Stability--Characterize reactor loop and PCD operations with short-term tests by varying coal-feed rate, air/coal ratio, riser velocity, solids-circulation rate, system pressure, and air distribution. Secondary objectives included the following: Reactor Operations--Study the devolatilization and tar cracking effects from transient conditions during transition from start-up burner to coal. Evaluate the effect of process operations on heat release, heat transfer, and accelerated fuel particle heat-up rates. Study the effect of changes in reactor conditions on transient temperature profiles, pressure balance, and product gas composition. Effects of Reactor Conditions on Synthesis Gas Composition--Evaluate the effect of air distribution, steam/coal ratio, solids-circulation rate, and reactor temperature on CO/CO{sub 2} ratio, synthesis gas Lower Heating Value (LHV), carbon conversion, and cold and hot gas efficiencies. Research Triangle Institute (RTI) Direct Sulfur Recovery Process (DSRP) Testing--Provide syngas in support of the DSRP commissioning. Loop Seal Operations--Optimize loop seal operations and investigate increases to previously achieved maximum solids-circulation rate.

Unknown

2002-11-01

22

Developments in pulsed power technology  

Microsoft Academic Search

The size, weight, power rating, availability and reliability of electrical power systems are important for future weapons systems. Applications could include: advanced vehicles and systems; potential new weapons; and man-portable or alternative power. Over twenty R&D studies in pulsed power have been initiated by IAT for the US Army over the last three years. Highlights of some developments in rotating

Ian R. McNab

2001-01-01

23

Developments in tidal power  

NASA Astrophysics Data System (ADS)

Successful, planned, and potential tidal power plants and sites are discussed. Units are in operation in France and Russia, with the French plant using reversible blade turbines being used as a design guide for plants in Argentina and Australia. The U.S. is studying the feasibility of a plant in Passamaquaddy Bay, and Canada is pursuing construction of a plant in the Bay of Fundy. The Severn River in Great Britain is receiving a site study, and over a hundred plants have been built as local power systems in China. Bulb-type turbines, which enhance the volume emptying and filling the retaining basin, are considered as the highest performing power unit. Simpler one-way flow turbines have been suggested as more economical to install. Governmental, institutional, and investor impediments to tidal power plant are explored.

Charlier, R. H.

24

"Word Power" (Vocabulary Development).  

ERIC Educational Resources Information Center

|Containing numerous vocabulary-building activities and exercises, this guidebook is designed to help elementary students learn to manipulate language as they gain concrete experiences with words, increase their "word power," and have fun. The activities described involve dictionary games, synonyms, "saidonyms" (alternatives for the overused word…

Voorhees, Roxy

25

Fusion power development pathways  

Microsoft Academic Search

During the national fusion program Technical Planning Activity (TPA) led by Argonne National Laboratory, it was proposed that a systematic activity be initiated called Development Pathways Analysis. This activity was defined as {open_quotes}developing and applying methodologies for assessing the cost, risk, and schedule impacts of differing approaches to fusion development.{close_quotes} The TPA report states that an {open_quotes}important objective is to

Stephen O. Dean

1993-01-01

26

Power Mems Development.  

National Technical Information Service (NTIS)

We continued development on the Version 3.1 (V3.1) DC-DC converter design using the polymer sacrificial-layer-style switches. To ensure that each switch was electrically isolated, the V3.1 switches were fabricated on three glass wafers. The structural lay...

D. Hanser J. Bumgarner

2011-01-01

27

Geothermal power development in Indonesia  

SciTech Connect

Indonesia consisting of a volcanic island group with a large population has a growing need for electric power to partially replace oil consumption and is rapidly developing its geothermal resources. Geothermal studies of the area for approximately 50 years have culminated in the development of the Kamojang field with New Zealand assistance where 90 MW will be installed. The first 250 KW power station was installed in 1978. Six geothermal areas have been selected by the government for early development in Java and Bali. A geothermal steam cleaner has been installed at Kamojang to reduce turbine maintenance requirements representing a new state of the art development. At Dieng in Central Java wells have located a geothermal reservoir at 2000 meters depth and a potential for 1000 to 2000 MW has been estimated for that region. A 2000 KW power station was started-up in March 1981 at Dieng where several villages will be served for the first time.

Shulman, G.

1981-10-01

28

Development Status of Power Processing Unit  

Microsoft Academic Search

Mitsubishi Electric Corporation (MELCO) has been developing a Hall thruster and its power processing unit (PPU). An anode power supply and a cathode keeper power supply of the PPU for a hall thruster demand high technique. The anode power supply needs large power, high voltage, and high efficiency. On the other hand, the cathode keeper power supply requires good constant

Hiroyuki Osuga; Kentarou Suzuk; Toshiyuki Ozaki; Takafumi Nakagawa; Ikuro Suga; Tomoyuki Kawakam; Takuya Sakai; Yoshiyuki Akuzawa; Fumitoshi Soga; Teppei Furuich

29

Plastic Laminate Pulsed Power Development  

SciTech Connect

The desire to move high-energy Pulsed Power systems from the laboratory to practical field systems requires the development of compact lightweight drivers. This paper concerns an effort to develop such a system based on a plastic laminate strip Blumlein as the final pulseshaping stage for a 600 kV, 50ns, 5-ohm driver. A lifetime and breakdown study conducted with small-area samples identified Kapton sheet impregnated with Propylene Carbonate as the best material combination of those evaluated. The program has successfully demonstrated techniques for folding large area systems into compact geometry's and vacuum impregnating the laminate in the folded systems. The major operational challenges encountered revolve around edge grading and low inductance, low impedance switching. The design iterations and lessons learned are discussed. A multistage prototype testing program has demonstrated 600kV operation on a short 6ns line. Full-scale prototypes are currently undergoing development and testing.

ALEXANDER,JEFF A.; SHOPE,STEVEN L.; PATE,RONALD C.; RINEHART,LARRY F.; JOJOLA,JOHN M.; RUEBUSH,MITCHELL H.; CROWE,WAYNE; LUNDSTROM,J.; SMITH,T.; ZAGAR,D.; PRESTWICH,K.

2000-09-01

30

Why Mami Wata matter: Local considerations for sustainable waterpower development policy in Central Africa  

Microsoft Academic Search

This paper is based on the author's fieldwork on the incorporation of local cultural understandings in the design of rural sustainability projects in the Democratic Republic of Congo. It explores several narratives about Mami Wata, mythological aquatic figures widely known in West and Central Africa, and their meanings for small-scale waterpower development projects, or micro-hydros. Careful examination of such narratives

Richard B. Peterson

2006-01-01

31

Wind, Sun and Water: Complexities of Alternative Energy Development in Rural Northern Peru  

ERIC Educational Resources Information Center

|Drawing on recent research with NGO-driven projects in rural Cajamarca, Peru, we examine the paradoxes of relying on wind, solar and micro-hydro generation of electricity for rural community development. In spite of cost, vagaries of these energy resources and limited material benefits, especially with wind and solar systems, villagers are…

Love, Thomas; Garwood, Anna

2011-01-01

32

Role of nuclear power in the Philippine power development program  

Microsoft Academic Search

The reintroduction of nuclear power in the Philippines is favored by several factors such as: the inclusion of nuclear energy in the energy sector of the science and technology agenda for national development (STAND); the Large gap between electricity demand and available local supply for the medium-term power development plan; the relatively lower health risks in nuclear power fuel cycle

Aleta

1994-01-01

33

Development of Thailand's first nuclear power plant  

Microsoft Academic Search

Strengthening energy security, mitigating global warming and being competitive in global markets are among reasons Thailand is developing nuclear power program. Based on the current Thailand Power Development Plan there will be 5 units of a 1,000 MWe nuclear power plant commercialized from 2020 to 2028. Nuclear power will contribute no greater than 10% of Thailand electricity generation. Currently, Electricity

A. Patchimpattapong

2010-01-01

34

25 CFR 137.6 - Power development.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF THE INTERIOR FINANCIAL ACTIVITIES REIMBURSEMENT OF CONSTRUCTION COSTS, SAN CARLOS INDIAN IRRIGATION PROJECT, ARIZONA § 137.6 Power development. The cost of the power development at the Coolidge Dam is hereby fixed at...

2013-04-01

35

25 CFR 137.6 - Power development.  

Code of Federal Regulations, 2011 CFR

...CARLOS INDIAN IRRIGATION PROJECT, ARIZONA § 137.6 Power development. The cost of the power development at the Coolidge Dam is hereby fixed at $735,000. The net revenues derived from the operation of this power development shall be disposed of as...

2011-04-01

36

Renewables for sustainable village power  

SciTech Connect

It is estimated that two billion people live without electricity and its services. In addition, there is a sizeable number of rural villages that have limited electrical service, with either part-day operation by diesel gen-sets or partial electrification (local school or community center and several nearby houses). For many villages connected to the grid, power is often sporadically available and of poor quality. The U.S. National Renewable Energy Laboratory (NREL) in Golden, Colorado, has initiated a program to address these potential electricity opportunities in rural villages through the application of renewable energy (RE) technologies. The objective of this program is to develop and implement applications that demonstrate the technical performance, economic competitiveness, operational viability, and environmental benefits of renewable rural electric solutions, compared to the conventional options of line extension and isolated diesel mini-grids. These four attributes foster sustainability; therefore, the program is entitled Renewables for Sustainable Village Power (RSVP). The RSVP program is a multi-technology, multi-application program composed of six activities, including village applications development, computer model development, systems analysis, pilot project development, technical assistance, and Internet-based village power project data base. While the current program emphasizes wind, photovoltaics (PV), and their hybrids with diesel gen-sets, micro-hydro and micro-biomass technologies may be integrated in the future. NREL`s RSVP team is currently involved in rural electricity projects in thirteen countries, with U.S., foreign, and internationally based agencies and institutions. The integration of the technology developments, institutional experiences, and the financial solutions for the implementation of renewables in the main line rural electrification processes in both the developing world and remote regions of the developed world is the goal.

Flowers, L.

1997-03-01

37

Nuclear power under the clean development mechanism  

Microsoft Academic Search

Not a few developing countries have been following a policy of positively introducing nuclear power to meet the predicted increase in energy demand in future, however, nuclear power development needs technically and financially advanced infrastructures. It is essential for the developing countries to receive technical and financial supports from a developed country or countries, in relation to procurement of funds,

Ichiro Ikemoto; Keiji Kanda

2000-01-01

38

Recent developments in power transistors  

Microsoft Academic Search

Power transistors capable of providing five watts output are now in production. Because these units are relatively non-linear in their characteristics, large signal graphical analysis of their behavior is necessary. To facilitate this, the static characteristics of the grounded base, grounded emitter, and grounded collector circuits are presented for several temperatures. Since power transistors are seldom driven with a high

H. T. Mooers

1955-01-01

39

DOE/SCS Power Systems Development Facility.  

National Technical Information Service (NTIS)

The use of coal for power generation has come under increasing environmental scrutiny over the past five years. Advances in coal-based power generation technology will continue to develop towards systems that have high efficiency, environmental superiorit...

Z. U. Haq T. E. Pinkston R. E. Sears P. Vimalchand

1993-01-01

40

PEM fuel cell utility power plant development  

Microsoft Academic Search

Summary form only given as follows. Development of fuel cell power plants for utility applications has been the major thrust of this technology over the years. Phosphoric acid fuel cell power plants have been the first to be placed in field demonstrations and to be offered as commercial products. Molten carbonate and solid oxide fuel cell power plants have been

J. R. Huff; D. S. Watkins; R. Cohen

1994-01-01

41

Development of YBCO power devices in Japan  

NASA Astrophysics Data System (ADS)

A new Japanese national project, called M-PACC, to develop high temperature superconducting electric power devices started in June last year (FY2008-FY2012). This project aims to develop three different types of electric power devices that are expected to provide stable power supplies with large capacity and small size by using YBCO coated conductors. The first program is the development of a 2 GJ class superconducting magnetic energy storage system to control stable electric power systems. It is planned to develop several sets of element coils for a 20 MJ class system as a technological feasibility study for a 2 GJ class coil. The second program is the development of two different types of power cables with higher performance than existing power cables; one is a three-core 66 kV-5 kA class large current cable and the other is a single-phase 275 kV-3 kA class high voltage cable. These cable were required several technological developments, namely, large current and low AC loss, high voltage insulation and low dielectric loss, and power and heat balance for both cables. The third program is the development of a 20 MVA class power transformer with 66 kV/6.9 kV as a distribution transformer. In this project, power transformer systematization technology including 2 kA class large current coil technology, anti short-circuit wire winding technology, AC loss reduction technology, and winding technology will be developed.

Fujiwara, N.; Hayashi, H.; Nagaya, S.; Shiohara, Y.

2010-11-01

42

U.S. Wind Power Development  

SciTech Connect

The report provides an overview of domestic wind power development which provides an understanding of where the industry stands today, how it got there, and where it is going. The advent of state renewable portfolio standards and the 3-year renewal of the production tax credit have driven wind power to record levels. A key objective of the report is to provide a comprehensive view of what is behind these developments, so that industry participants can take advantage of the opportunity offered by wind power. Topics covered include: overview of U.S. wind power including its history, current status, and future prospects; business drivers of the U.S. wind power market; barriers to the growth of the U.S. wind power market; keys to successful wind power project development; economics of U.S. wind power, including cost, revenue, and government subsidy components; analysis of key state markets for wind power development; and, profiles of major U.S. wind power project developers.

NONE

2007-11-15

43

High power microwave source development  

NASA Astrophysics Data System (ADS)

The requirements of this project have been to: (1) improve and expand the sources available in the facility for testing purposes and (2) perform specific tasks under direction of the Defense Nuclear Agency about the applications of high power microwaves (HPM). In this project the HPM application was power beaming. The requirements of this program were met in the following way: (1) We demonstrated that a compact linear induction accelerator can drive HPM sources at repetition rates in excess of 100 HZ at peak microwave powers of a GW. This was done for the relativistic magnetron. Since the conclusion of this contract such specifications have also been demonstrated for the relativistic klystron under Ballistic Missile Defense Organization funding. (2) We demonstrated an L band relativistic magnetron. This device has been used both on our single pulse machines, CAMEL and CAMEL X, and the repetitive system CLIA. (3) We demonstrated that phase locking of sources together in large numbers is a feasible technology and showed the generation of multigigawatt S-band radiation in an array of relativistic magnetrons.

Benford, James N.; Miller, Gabriel; Potter, Seth; Ashby, Steve; Smith, Richard R.

1995-05-01

44

The Power Systems Development Facility -- Current status  

Microsoft Academic Search

Southern Company Services, Inc. (SCS) has entered into a cooperative agreement with the US Department of Energy (DOE) to build and operate the Power Systems Development Facility (PSDF), currently under construction in Wilsonville, Alabama, 40 miles southeast of Birmingham. The objectives of the PSDF are to develop advanced coal-fired power generation technologies through testing and evaluation of hot gas cleanup

T. E. Pinkston; J. D. Maxwell; R. F. Leonard; P. Vimalchand

1995-01-01

45

Development of Power Assisting Suit  

NASA Astrophysics Data System (ADS)

In order to realize a wearable power assisting suit for assisting a nurse to carry a patient in her arms, the power supply and control systems of the suit have to be miniaturized, and it has to be wireless and pipeline-less. The new wearable suit consists of shoulders, arms, back, waist and legs units to be fitted on the nurse's body. The arms, waist and legs have new pneumatic rotary actuators driven directly by micro air pumps supplied by portable Ni-Cd batteries. The muscle forces are sensed by a new muscle hardness sensor utilizing a sensing tip mounted on a force sensing film device. An embedded microcomputer is used for the calculations of control signals. The new wearable suit was applied practically to a human body and a series of movement experiments that weights in the arms were held and taken up and down was performed. Each unit of the suit could transmit assisting torque directly to each joint verifying its practicability.

Yamamoto, Keijiro; Ishii, Mineo; Hyodo, Kazuhito; Yoshimitsu, Toshihiro; Matsuo, Takashi

46

Environmental implications of Indian power sector development  

SciTech Connect

Development of a power sector is capital intensive. In addition, the Indian power system, being dominated by coal, pollutes the environment significantly. The present article analyzes the investment requirement and environmental implications of the Indian power system during 1997/98--2006/07. Higher GDP growth rates expected as a result of the recently introduced economic reforms in India have been considered in the study.

Das, A.; Kandpal, T.C.

2000-06-01

47

Development of 2 W UHF power amplifier  

Microsoft Academic Search

This paper describes the development of a three-stage transistor amplifier delivering a power output of 2 W in the frequency range 720 MHz-820 MHz. The input and output matching networks of the amplifier are realized on microstrips. Design of a power stage is discussed in detail. The amplifier meets all the design goals e.g., 2 W power output, bandwidth, ease

D. Rustogi; V. K. Garg; R. V. Singh

1977-01-01

48

Recent Developments of Repetitive Pulsed Power Technology  

NASA Astrophysics Data System (ADS)

One of the important issues in pulsed power generation is the voltage multiplication. In recent years, several new technologies for voltage multiplication have been developed for compact, repetitive pulsed power generation. This paper summarizes the results of the researches carried out recently on voltage multiplication by using (1) saturable capacitor, (2) compact Marx circuit, and (3) semiconductor opening switch.

Jiang, Weihua

49

Development of high power microwave source  

NASA Astrophysics Data System (ADS)

To achieve thermonuclear fusion it is inevitable to develop high power microwave and millimeter wave sources for plasma heating. In 1990, working group was organized as a collaboration study in National Institute for Fusion Science to review the present status of development on high microwave source. The review of development on high power klystron and gyrotron, FEL and microwave power source by REB is reported. Development of high power klystron is almost finished except for cooling of the window, cavity, and collector. As for the gyrotron oscillating with the whispering gallery mode, one must overcome the same problem for CW operation. In the quasi-optical gyrotron, there is no special progress for increasing the frequency and efficiency. Though the experimental evidence on autoresonance in the development of peniotron is performed, output power and frequency is much smaller than that of the gyrotron. It is difficult to increase in the pulse width of FEL having giant power of GW level with several ten ns and the utilization for plasma heating is limited. In addition, microwave and millimeter wave oscillators with high power which are running in the laboratories and the institutes are summarized.

Ono, Shoichi

1992-04-01

50

Power Systems Development Facility, PFBC system perspectives.  

National Technical Information Service (NTIS)

Southern Company Services (SCS) has investigated the feasibility of constructing a Power Systems Development Facility (PSDF) at the Southem Company's Clean Coal Research Center in Wilsonville, Alabama. The PSDF combines a number of pilot-scale test facili...

G. H. Griswold T. J. Boyd M. O. Fankhanel C. J. Crumm D. H. Pontius

1993-01-01

51

Exploratory Development Study Microelectronics UHF Power Assembly.  

National Technical Information Service (NTIS)

The report identifies possible future microelectronic development tasks which will lead to a more optimum RF power assembly which is compatible with monolithic fabrication techniques. Component, circuit technique, mechanical and thermal transfer design re...

C. M. Abrahamson W. S. Heath

1971-01-01

52

Risk Assessment of Nuclear Power Development.  

National Technical Information Service (NTIS)

An approach to risk evaluation of nuclear power development is presented. The obtained values for both individual and collective risks for the population in the vicinity of nuclear plants are compared with the corresponding permissible values. (Atomindex ...

B. Kalchev D. Gencheva

1984-01-01

53

Power Systems Development Facility, PFBC system perspectives  

SciTech Connect

Southern Company Services (SCS) has investigated the feasibility of constructing a Power Systems Development Facility (PSDF) at the Southem Company`s Clean Coal Research Center in Wilsonville, Alabama. The PSDF combines a number of pilot-scale test facilities at a single site to reduce the overall capital and operating cost compared to individual stand-alone facilities, while continuing the DOE/METC`s objective of carrying out meaningful systems and component testing for advanced coal-based power generation development. The intent of the PSDF is to provide a flexible test facility that can be used to develop advanced power system components and assess the integration and control issues of these advanced power systems. The facility would provide a resource for rigorous, long-term testing and performance assessment of hot stream cleanup devices in an integrated environment, permitting evaluation of not only the cleanup devices but also other components in an integrated operation.

Griswold, G.H. [Southern Co. Services, Inc., Birmingham, AL (United States); Boyd, T.J. [Electric Power Research Inst., Palo Alto, CA (United States); Fankhanel, M.O. [Kellogg (M.W.) Co. (United States); Crumm, C.J. [Foster Wheeler Corp. (United States); Pontius, D.H. [SRI International, Menlo Park, CA (United States)

1993-09-01

54

Geothermal Power Development in the Phillippines  

SciTech Connect

The generation of electric power to meet the needs of industrial growth and dispersal in the Philippines is aimed at attaining self-reliance through availment of indigenous energy resources. The Philippines by virtue of her position in the high-heat flow region has in abundance a number of exploitable geothermal fields located all over the country. Results indicate that the geothermal areas of the Philippines presently in various stages of exploration and development are of such magnitude that they can be relied on to meet a significant portion of the country's power need. Large scale geothermal energy for electric power generation was put into operation last year with the inauguration of two 55-MW geothermal generating units at Tiwi, Albay in Southern Luzon. Another two 55-MW units were added to the Luzon Grid in the same year from Makiling-Banahaw field about 70 kilometers south of Manila. For 1979 alone, therefore, 220-MW of generating capacity was added to the power supply coming from geothermal energy. This year a total of 220-MW power is programmed for both areas. This will bring to 443-MW of installed generating capacity from geothermal energy with 3-MW contributed by the Tongonan Geothermal pilot plant in Tongonan, Leyte, Central Philippines in operation since July 1977. Financial consideration of Philippine experience showed that electric power derived from geothermal energy is competitive with other sources of energy and is a viable source of baseload electric power. Findings have proven the technical and economic acceptability of geothermal energy resources development. To realize the benefits that stem from the utilization of indigenous geothermal resources and in the light of the country's ever increasing electric power demand and in the absence of large commercial oil discovery in the Philippines, geothermal energy resource development has been accelerated anew. The program includes development of eight fields by 1989 by adding five more fields to the currently developed and producing geothermal areas.

Jovellanos, Jose U.; Alcaraz, Arturo; Datuin, Rogelio

1980-12-01

55

High-power microwave development in Russia  

NASA Astrophysics Data System (ADS)

This is a survey of Russian research and development in high-power microwave (HPM) sources. It emphasizes those sources of nanoseconds pulse duration time which have potential weapon as well as radar applications. It does not cover the whole range of Russian HPM research and development but concentrates on those aspects which may lead to military applications. Russian investigators have achieved many world firsts in HPM generation; for example, a multiwave Cerenkov generator with a peak output power of 15 gigawatts. Their successes are based on their impressive capability in pulsed power technology which has yielded high-current generators of terawatt peak power. They have transformed the energy of these currents into microwave radiation using tubes of both conventional and novel designs exploiting relativistic electron beams. Recently, the development of high-current mini-accelerators has moved relativistic electron-beam (REB) HPM generation out of the laboratory and enabled the development of deployable military systems with peak powers in the gigawatt range. As a result, they now see development of a REB-based radar systems as one of the most promising directions in radar systems. Details of such a system are described and the implications for HPM weapons are considered.

Gauthier, Sylvain

1995-03-01

56

Expected development of chemical power sources  

NASA Astrophysics Data System (ADS)

An investigation of chemical power sources considers their use by professional consumers in terms of loadability, weight, life, purchase price, operating price, maintenance requirements, and reliability. The criteria for non-professional consumers are mainly purchase price and whether the system is maintenance-free. The single power sources evaluated according to technical requirements, economic properties, convenience, and prognosis include lead-acid accumulators; Ni-Cd accumulators; Ni-Fe accumulators; Ni-Zn accumulators; Ag-Zn accumulators; Zn-Br system accumulators; and accumulators operating at high and average temperatures. Also considered are Leclanchecells; alkali-manganese dioxide cells; elements with Li anode; and fuel cells. It is concluded that present power sources will probably continue to be used for the next 5-10 years, and further development is proposed in various areas, including power supplies for spacecraft and satellites.

Kulcsar, S.

1984-02-01

57

Harnessing wind power in developing countries  

Microsoft Academic Search

This paper discusses the possibilities of harnessing wind power in developing countries to mitigate the burdens imposed by high price of imported fuel and to augment their total energy supply. Special emphasis is given to the use of variable-speed constant-frequency field modulated generator systems to tap wind energy in constant frequency ac form for use in conjunction with conventional utility

R. Ramakumar

1975-01-01

58

Geothermal power developments in the Third World  

Microsoft Academic Search

Emphasis on geothermal energy development in Third World countries is on electric power rather than non-electric direct uses, with some exceptions in Kenya, Viet Nam and China. Eastern European nations will continue to pursue non-electric uses and western nations will attempt to span both sets of uses. Multiple-source funding, including the United Nations Development Programme, bilateral and\\/or private investment funds

J. B. Koenig; J. R. McNitt; M. C. Gardner

1981-01-01

59

Overview of worldwide geothermal power development  

NASA Astrophysics Data System (ADS)

The progress in geothermal power plant development around the world is reviewed. From an installed capacity of about 150 MW, the worldwide geothermal electric capacity now stands at roughly 2550 MW. The status of geothermal installed capacity is given. Over 120 individual power units (i.e., turbo-generator sets) are now in operation. It is interesting to note that one third of these are in Italy, the country that began the commercial generation of electricity from geothermal energy. The recent growth pattern is shown. These has been an increase of 45%, and the installed capacity is expected to exceed 4400 MW, a 150% increase.

Dipippo, R.

1982-12-01

60

Experimental development of power reactor advanced controllers  

SciTech Connect

A systematic approach for developing and verifying advanced controllers with potential application to commercial nuclear power plants is suggested. The central idea is to experimentally demonstrate an advanced control concept first on an ultra safe research reactor followed by demonstration on a passively safe experimental power reactor and then finally adopt the technique for improving safety, performance, reliability and operability at commercial facilities. Prior to completing an experimental sequence, the benefits and utility of candidate advanced controllers should be established through theoretical development and simulation testing. The applicability of a robust optimal observer-based state feedback controller design process for improving reactor temperature response for a TRIGA research reactor, Liquid Metal-cooled Reactor (LMR), and a commercial Pressurized Water Reactor (PWR) is presented to illustrate the potential of the proposed experimental development concept.

Edwards, R.M. (Pennsylvania State Univ., University Park, PA (United States). Dept. of Nuclear Engineering); Weng, C.K. (Pennsylvania State Univ., University Park, PA (United States). Dept. of Mechanical Engineering); Lindsay, R.W. (Argonne National Lab., Idaho Falls, ID (United States))

1992-01-01

61

Development of high power capacitor charging power supply for pulsed power applications  

Microsoft Academic Search

High power capacitor charging power supply (CCPS) using a series resonant converter technology has been developed. The CCPS adopted a 33 kHz IGBT series resonant inverter and a high-efficiency, high-voltage transformer. The performance test of the CCPS was carried out with a 33 nF load capacitor at 40 kV output voltage and 1 kpps repetition rate. Peak power rate of

M. Souda; F. Endo; C. Yamazaki; K. Okamura; K. Fukushima

1999-01-01

62

Analysis of Alaska hydro power development  

SciTech Connect

Alaska leads the world in terms of total potential for hydropower development, yet Alaska is 91% dependent on fossil fuels. A mix of gas, diesel and coal-fired power plants generate all but 9% of its electricity. This dependence on fossil fuels stems from the abundance of cheap gas, coal and oil-nonrenewable resources that are becoming more costly. Hydro power is also costly; however, most hydro projects are justified by long term returns. Once the water hits the turbine in a hydro project, the operating and maintenance cost is practically nil. The successful completion of two complex thin-arch concrete dams and several other hydro projects are discussed in order to meet Alaska's power demand.

Sieber, O.V.

1983-12-01

63

Status of superconducting power transformer development  

SciTech Connect

Development of the superconducting transformer is arguably the most difficult of the ac power applications of superconductivity - this is because of the need for very low ac losses, adequate fault and surge performance, and the rigors of the application environment. This paper briefly summarizes the history of superconducting transformer projects, reviews the key issues for superconducting transformers, and examines the status of HTS transformer development. Both 630-kVA, three-phase and 1-MVA single phase demonstration units are expected to operate in late 1996. Both efforts will further progress toward the development of economical and performance competitive superconducting transformers.

Johnson, R.C.; McConnell, B.W.; Mehta, S.P. [and others

1996-03-01

64

Power Systems Development Facility, PFBC system perspectives  

Microsoft Academic Search

Southern Company Services (SCS) has investigated the feasibility of constructing a Power Systems Development Facility (PSDF) at the Southem Company`s Clean Coal Research Center in Wilsonville, Alabama. The PSDF combines a number of pilot-scale test facilities at a single site to reduce the overall capital and operating cost compared to individual stand-alone facilities, while continuing the DOE\\/METC`s objective of carrying

G. H. Griswold; T. J. Boyd; M. O. Fankhanel; C. J. Crumm; D. H. Pontius

1993-01-01

65

Power Systems Development Facility progress report  

SciTech Connect

This is a report on the progress in design and construction of the Power Systems Development Facility. The topics of the report include background information, descriptions of the advanced gasifier, advanced PFBC, particulate control devices, and fuel cell. The major activities during the past year have been the final stages of design, procurement of major equipment and bulk items, construction of the facility, and the preparation for the operation of the Facility in late 1995.

Rush, R.E.; Hendrix, H.L.; Moore, D.L.; Pinkston, T.E.; Vimalchand, P.; Wheeldon, J.M.

1995-11-01

66

Wireless Power Transmission Technology Development and Demonstrations  

NASA Astrophysics Data System (ADS)

The Wireless Power Transmission (WPT) technology has been treated to a wide extent in the recent years. A broad variety of applications has been investigated, from earth to orbit, orbit to earth, in-orbit and planetary ones, as for moon and Mars missions. In this course the question to use laser or microwave technology has widely been discussed. Beaming energy to spacecrafts could provide an important space mission-economic potential. It promises significant reduction in the cost of access to space, for scientific and commercial missions, and increases the mission capabilities for in-space systems. For the future enhancement of ISS capabilities and operational efficiency, the use of WPT technology became part of the technology research planning for the ISS. The WPT may have the potential of providing operational benefits, increase of spacecraft systems efficiency for elements like co-orbiting platforms, transfer vehicles or other ISS related in-orbit spacecrafts, and planetary exploration vehicles. The laser technology provides specific technical, operational and economic benefits compared to microwave applications and provides the actual basis for the envisioned wireless power transmission concepts. An outlook in terms of future wireless power perspectives, both for terrestrial as for space-to-space scenarios is given; these applications are part of a technology demonstration roadmap for wireless power transmission key- and supporting technologies, which is characterized by dedicated technology demonstration milestones on ground and in space. The actual technology development philosophy as conceived at EADS-Space Transportation is described and includes main system demonstration missions, as a laboratory test bed employing a small rover system, a scaled airship model demonstration as planned in 2004 and an experiment onboard the International Space Station ISS. These demonstrations represent milestones in terms of technical capability verification on the way to solar power platforms in space, as an actual Solar Power Platform Design Concept in the 400 kW range for GEO including the receiver side on ground. Special attention is given to the fact, that technological spin-offs out of the Solar Power Platforms development are an essential aspect of the activities. The application of the suitable type of laser systems for future solar power concepts in space will be discussed, based on recent investigations in the frame of the EADS technology development work. The experimental application of a laser system for power transmission to a moveable and steerable target, a small rover, is addressed also and the demonstration philosophy and experimental set-up are detailed. The ground test objectives, the definition, design and performance of a "Wireless Power Transmission" system and the demonstration of the basic principles of power transmission and target acquisition, pointing and tracking are covered. The lessons learned and consequences for a continuation of this type of demonstration are outlined.

Steinsiek, F.; Weber, K.-H.; Foth, W.-P.; Foth, H. J.; Schäfer, C.

2004-12-01

67

Solid state power controller fuse development program  

NASA Astrophysics Data System (ADS)

The purpose of this development program is to design a family of fail-safe fuses (2-30A, 28VDC, 115/230V-400 Hz) for applications in aircraft electrical systems solid state power controllers (SSPCs). The SSPC functions as a circuit interrupter and a load controller, and when operating properly should protect the aircraft wiring between itself and the load. However, if the SSPC fails to open during a short or overload condition, excessive current can flow, resulting in serious damage to aircraft wiring. The purpose of the SSPC fuse is to prevent wire damage in this double fault condition.

Spauhorst, V. R.; Curtis, W. H.; Kalra, V.

1983-10-01

68

IMPORTANCE OF HIGH POWER DENSITY BOILING-WATER REACTOR DEVELOPMENT TO WIDE SPREAD ECONOMIC NUCLEAR POWER  

Microsoft Academic Search

The goals, economic advantages, and status of high power density ; development in boiling water reactors are discussed. The incentives and ; disadvantages of high power density development are compared, and it is concluded ; that the development will lead to reduced nuclear power costs. High power ; density operating experience will be acquired from the Big Rock Point Nuclear

D. H. Imhoff; S. Levy

1962-01-01

69

An accelerated fusion power development plan  

NASA Astrophysics Data System (ADS)

Energy for electricity and transportation is a national issue with worldwide environmental and political implications. The world must have energy options for the next century that are not vulnerable to possible disruption for technical, environmental, public confidence, or other reasons. Growing concerns about the greenhouse effect and the safety of transporting oil may lead to reduced burning of coal and other fossil fuels, and the incidents at Three Mile Island and Chernobyl, as well as nuclear waste storage problems, have eroded public acceptance of nuclear fission. Meeting future world energy needs will require improvements in energy efficiency and conservation. However, the world will soon need new central station power plants and increasing amounts of fuel for the transportation sector. The use of fossil fuels, and possibly even fission power, will very likely be restricted because of environmental, safety, and, eventually, supply considerations. Time is running out for policymakers. New energy technologies cannot be brought to the marketplace overnight. Decades are required to bring a new energy production technology from conception to full market penetration. With the added urgency to mitigate deleterious environmental effects of energy use, policymakers must act decisively now to establish and support vigorous energy technology development programs. The U.S. has invested 8 billion over the past 40 years in fusion research and development. If the U.S. fusion program proceeds according to its present strategy, an additional 40 years, and more money, will be expended before fusion will provide commercial electricity. Such an extended schedule is neither cost-effective nor technically necessary. It is time to launch a national venture to construct and operate a fusion power pilot plant. Such a plant could be operational within 15 years of a national commitment to proceed.

Dean, Stephen O.; Baker, Charles C.; Cohn, Daniel R.; Kinkead, Susan D.

1991-06-01

70

The Power Systems Development Facility -- Current status  

SciTech Connect

Southern Company Services, Inc. (SCS) has entered into a cooperative agreement with the US Department of Energy (DOE) to build and operate the Power Systems Development Facility (PSDF), currently under construction in Wilsonville, Alabama, 40 miles southeast of Birmingham. The objectives of the PSDF are to develop advanced coal-fired power generation technologies through testing and evaluation of hot gas cleanup systems and other major components at the pilot scale. The performance of components will be assessed and demonstrated in an integrated mode of operation and at a component size readily scaleable to commercial systems. The facility will initially contain five modules: (1) a transport reactor gasifier and combustor, (2) an advanced pressurized fluidized-bed combustion (APFBC) system, (3) a particulate control module, (4) an advanced burner-gas turbine module, and (5) a fuel cell. The five modules will initially be configured into two separate test trains, the transport reactor train (2 tons/hour of coal feed) and the APFBC train (3 tons/hour of coal feed). In addition to a project description, the project design and construction status, preparations for operations, and project test plans are reported in this paper.

Pinkston, T.E.; Maxwell, J.D.; Leonard, R.F.; Vimalchand, P.

1995-11-01

71

Development of an independent type of hybrid power generation system  

Microsoft Academic Search

In this paper, the optimum control technology of an independent type of hybrid power system with wind and solar power generation, which enables a stable power supply to the loads, proposed and developed. This system comprises wind power generation inverter, solar power generation inverter, bidirectional inverter for storage batteries, and engine generator. Each inverter is connected with engine generator in

T. Hirose; H. Matsuo; Y. Ishizuka

2009-01-01

72

Study and Development of Marine Power Station Simulator  

Microsoft Academic Search

The paper discussed how to develop simulator of marine power system which is a kind of power system making up of several generators and AC&DC power supply, including general design and simulation mathematical model. According to characteristics and operational requirements of marine power system, a complete set of mathematical models of marine power system were established, which included turbine generator

Cheng Shouyu; Peng Minjun; Gong Cheng; Liu Xinkai; Lin XuanBo

2010-01-01

73

A concept of space nuclear power development in Russia  

Microsoft Academic Search

The purpose of developing space nuclear power in Russia is to establish an advanced scientific and technological base on unified key components of samples of space nuclear power and propulsion engineering products. Establishment of said base will reduce time required for development of nuclear power and power\\/propulsion systems (NPS and NPPS) in the future, should a decision is made on

Valery A. Menshikov; Anatoly I. Kuzin; Konstantin A. Pavlov; Sergey P. Zatserkovny; Alexander V. Kalmykov; Alexander N. Sorokin; Andrey Ya. Bulavatsky; Vladimir S. Vasilkovsky; Pavel V. Andreev; Anatoly V. Zrodnikov; Nikolai N. Ponomarev-Stepnoi; Yuri V. Nikolaev; Valery S. Bezzubtsev; Evgueni O. Adamov

1997-01-01

74

Power Systems Development Facility. Environmental Assessment  

SciTech Connect

The objective of the PSDF would be to provide a modular facility which would support the development of advanced, pilot-scale, coal-based power systems and hot gas clean-up components. These pilot-scale components would be designed to be large enough so that the results can be related and projected to commercial systems. The facility would use a modular approach to enhance the flexibility and capability for testing; consequently, overall capital and operating costs when compared with stand-alone facilities would be reduced by sharing resources common to different modules. The facility would identify and resolve technical barrier, as well as-provide a structure for long-term testing and performance assessment. It is also intended that the facility would evaluate the operational and performance characteristics of the advanced power systems with both bituminous and subbituminous coals. Five technology-based experimental modules are proposed for the PSDF: (1) an advanced gasifier module, (2) a fuel cell test module, (3) a PFBC module, (4) a combustion gas turbine module, and (5) a module comprised of five hot gas cleanup particulate control devices. The final module, the PCD, would capture coal-derived ash and particles from both the PFBC and advanced gasifier gas streams to provide for overall particulate emission control, as well as to protect the combustion turbine and the fuel cell.

Not Available

1993-06-01

75

Development of bismuth self-powered detector  

NASA Astrophysics Data System (ADS)

Self-powered detectors have been developed with bismuth (2mm diameter×6.4mm) and platinum (2mm diameter ×5mm) emitters. Tests at a 60Co irradiation facility in 0.125MR/h (484.5MC/kg/h) gamma field showed that the gamma sensitivity of the two detectors is 0.121fA/R/h (0.468pA/C/kg/h) and 0.17fA/R/h (0.658pA/C/kg/h). When tested in the core location in Apsara Swimming Pool reactor the current from Bi detector was assumed to be totally gamma-induced. This information was used to derive the neutron-induced component of the Pt detector in which 55% of the total signal was gamma-induced. The neutron sensitivity was found to be 0.54×10-21A/nv.

Alex, Mary; Prasad, K. R.; Kataria, S. K.

2004-05-01

76

Kilovolt dc solid state remote power controller development  

NASA Astrophysics Data System (ADS)

The experience gained in developing and applying solid state power controller (SSPC) technology at high voltage dc (HVDC) potentials and power levels of up to 25 kilowatts is summarized. The HVDC switching devices, power switching concepts, drive circuits, and very fast acting overcurrent protection circuits were analyzed. A 25A bipolar breadboard with Darlington connected switching transistor was built. Fault testing at 900 volts was included. A bipolar transistor packaged breadboard design was developed. Power MOSFET remote power controller (RPC) was designed.

Mitchell, J. T.

1982-10-01

77

NASA's Advanced Radioisotope Power Conversion Technology Development Status  

Microsoft Academic Search

NASA's Advanced Radioisotope Power Systems (ARPS) project is developing the next generation of radioisotope power conversion technologies that will enable future missions that have requirements that cannot be met by either photovoltaic systems or by current radioisotope power systems (RPSs). Requirements of advanced RPSs include high efficiency and high specific power (watts\\/kilogram) in order to meet future mission requirements with

David J. Anderson; John Sankovic; David Wilt; Robert D. Abelson; Jean-Pierre Fleurial

2007-01-01

78

Development of Asset Management Decision Support Tools for Power Equipment  

Microsoft Academic Search

Development of asset management decision support tools become very intensive in order to reduce maintenance cost of power equipment due to the liberalization of power business. This article reviews some aspects of present status of asset management decision support tools development for power equipment based on the papers published in international conferences, domestic conventions, and several journals.

Tatsuki Okamoto; Tsuguhiro Takahashi

2007-01-01

79

Social and Ethical Considerations of Nuclear Power Development  

Microsoft Academic Search

A new urgency is emerging around nuclear power development and this urgency is accentuated by the post-tsunami events at the Fukushima Daiichi nuclear power plant in Japan. This urgency extends beyond these dramatic events in Japan, however, to many other regions of the world and situations where nuclear power development is receiving renewed attention as an alternative to carbon-based energy

John R. Parkins; Randolph Haluza-DeLay

2011-01-01

80

Potential role of power authorities in offshore wind power development in the US  

Microsoft Academic Search

This article examines how power authorities could facilitate and manage offshore wind power development in US coastal waters. The power authority structure is an American 20th century institution for managing energy resources—a form of a public authority or public corporation dedicated to creating, operating and maintaining electric generation and transmission infrastructure. Offshore wind power is characterized by high capital costs

Amardeep Dhanju; Jeremy Firestone; Willett Kempton

2011-01-01

81

Wind power development : economics and policies  

Microsoft Academic Search

This study reviews the prospects of wind power at the global level. Existing studies indicate that the earth's wind energy supply potential significantly exceeds global energy demand. Yet, only 1 percent of the global electricity demand is currently derived from wind power despite 40 percent annual growth in wind generating capacity over the past 25 years. More than 98 percent

G. Cornelis van Kooten; Govinda R. Timilsina

2009-01-01

82

Wind Power Development: Opportunities and Challenges  

Microsoft Academic Search

In this study, the prospects of wind power at the global level are reviewed. Existing studies indicate that the earth’s wind energy supply potential significantly exceeds global energy demand. Yet, only 1% of the global electricity demand is currently derived from wind power despite 40% annual growth in wind generating capacity over the last 25 years. More than 98% of

G. Cornelis van Kooten; Govinda R. Timilsina

2008-01-01

83

Advanced Radioisotope Power Conversion Technology Research and Development.  

National Technical Information Service (NTIS)

NASA's Radioisotope Power Conversion Technology program is developing next generation power conversion technologies that will enable future missions that have requirements that cannot be met by either the ubiquitous photovoltaic systems or by current Radi...

W. A. Wong

2004-01-01

84

Fuji, Thomson to develop, produce high-powered transistors  

Microsoft Academic Search

Some development lines pursued in making innovative products in the field of transistors for power switching are pointed out. The essential features of the new high-power modules produced are outlined.

P. Devittor

1985-01-01

85

Self-Powered Vehicle Detector (SPVD) Magnetic Sensor Development.  

National Technical Information Service (NTIS)

Development of a low power Brown type ring core magnetometer is described for a Self Powered Vehicle Detector (SPVD) unit capable of sensing motor vehicles in a roadway. Sensor stabilization techniques are discussed and a digital feedback loop was designe...

J. F. Scarzello S. W. Usher

1976-01-01

86

ZERO EMISSION POWER GENERATION TECHNOLOGY DEVELOPMENT  

SciTech Connect

Clean Energy Systems (CES) was previously funded by DOE's ''Vision 21'' program. This program provided a proof-of-concept demonstration that CES' novel gas generator (combustor) enabled production of electrical power from fossil fuels without pollution. CES has used current DOE funding for additional design study exercises which established the utility of the CES-cycle for retrofitting existing power plants for zero-emission operations and for incorporation in zero-emission, ''green field'' power plant concepts. DOE funding also helped define the suitability of existing steam turbine designs for use in the CES-cycle and explored the use of aero-derivative turbines for advanced power plant designs. This work is of interest to the California Energy Commission (CEC) and the Norwegian Ministry of Petroleum & Energy. California's air quality districts have significant non-attainment areas in which CES technology can help. CEC is currently funding a CES-cycle technology demonstration near Bakersfield, CA. The Norwegian government is supporting conceptual studies for a proposed 40 MW zero-emission power plant in Stavager, Norway which would use the CES-cycle. The latter project is called Zero-Emission Norwegian Gas (ZENG). In summary, current engineering studies: (1) supported engineering design of plant subsystems applicable for use with CES-cycle zero-emission power plants, and (2) documented the suitability and availability of steam turbines for use in CES-cycle power plants, with particular relevance to the Norwegian ZENG Project.

Ronald Bischoff; Stephen Doyle

2005-01-20

87

New developments in RF power sources  

SciTech Connect

The most challenging rf source requirements for high-energy accelerators presently being studied or designed come from the various electron-positron linear collider studies. All of these studies except TESLA (the superconducting entry in the field) have specified rf sources with much higher peak powers than any existing tubes at comparable high frequencies. While circular machines do not, in general, require high peak power, the very high luminosity electron-positron rings presently being designed as B factories require prodigious total average rf power. In this age of energy conservation, this puts a high priority on high efficiency for the rf sources. Both modulating anodes and depressed collectors are being investigated in the quest for high efficiency at varying output powers.

Miller, R.H.

1994-06-01

88

National Strategies for Nuclear Power Reactor Development.  

National Technical Information Service (NTIS)

The document assesses the potential for design innovation in three areas of nuclear power plant technology: light water reactor systems; liquid metal reactor systems; and high temperature gas reactor systems. The question of how capital costs scale with u...

R. K. Lester M. J. Driscoll M. W. Golay D. D. Lanning L. M. Lidsky

1985-01-01

89

Development of Inductive Storage Pulsed Power Generators.  

National Technical Information Service (NTIS)

A pulse generator, Pawn, has been assembled at the Naval Research Laboratory. It uses inductive energy storage and opening switch power conditioning techniques with high energy density capacitors as the primary energy store. The capacitor bank stores 1 MJ...

R. J. Commisso J. R. Boller G. Cooperstein R. D. Ford P. J. Goodrich

1988-01-01

90

Development of substrate integrated waveguide power dividers  

Microsoft Academic Search

Two classes of substrate integrated waveguide (SIW) power divider are presented, namely, Y- and T-types. Using arrays of via, the SIW power dividers and microstrip transitions are integrated on the same substrate. Design models are presented respectively for the Y- and T-junctions. Experimental results over the Ka band are given for both structures. The Y-junction shows a bandwidth of 25.2%

Simon Germain; Dominic Deslandes; Ke Wu

2003-01-01

91

ZERO EMISSION POWER GENERATION TECHNOLOGY DEVELOPMENT  

Microsoft Academic Search

Clean Energy Systems (CES) was previously funded by DOE's ''Vision 21'' program. This program provided a proof-of-concept demonstration that CES' novel gas generator (combustor) enabled production of electrical power from fossil fuels without pollution. CES has used current DOE funding for additional design study exercises which established the utility of the CES-cycle for retrofitting existing power plants for zero-emission operations

Ronald Bischoff; Stephen Doyle

2005-01-01

92

Development of high power neutral injectors - A review  

Microsoft Academic Search

A review of high power neutral injectors for plasma heating is presented. The flow pattern of power and of high energy and thermal particles is considered; problems in ion source development, extraction and acceleration of high power density and high brightness beams for long pulse lengths are discussed. In addition, progress in high transmission beams through beam lines, dissipation of

T. S. Green

1979-01-01

93

MGX: A High-Power, Pulsed Microwave Generator Development Project.  

National Technical Information Service (NTIS)

A high-power, short-pulse microwave source, MGX, is being developed at Lawrence Livermore National Laboratory. It will be used for high-power microwave vulnerability and lethality studies, investigation of air breakdown, and high-power microwave diagnosti...

R. Scarpetti G. Vogtlin R. Lundberg S. Burkhart W. Hofer

1983-01-01

94

Development of a renewable hybrid power generation system  

Microsoft Academic Search

A renewable hybrid power generation system is proposed. The motivation for the system is that grid power is often unreliable, limited or even nonexistent remote\\/rural areas such as forward operating bases and schools and hospitals in developing countries. The challenge of this system is to provide a reliable, cost-effective power management system that is scalable and uses renewable energy sources.

Chi Cheung; K. Bengtson; M. Moser; A. Wu; B. Parrilla; C. Mastrangelo

2009-01-01

95

Power Systems Development Facility: Filter element evaluation during combustion testing  

Microsoft Academic Search

The Power Systems Development Facility (PSDF) is a Department of Energy (DOE) sponsored engineering scale demonstration of two advanced coal-fired power systems. Particulate cleanup is achieved by utilizing High Temperature, High Pressure (HTHP) gas filtration systems. The PSDF was designed at sufficient scale so that advanced power systems and components could be tested in an integrated fashion to provide confidence

M. Davidson; X. Guan; H. Hendrix; B. Shirley

1999-01-01

96

Toward Development and Measurement of the Interpersonal Power Construct  

Microsoft Academic Search

This paper reports recent efforts to develop a perceptual measure of the power of another individual in dyadic relationships. The Measure of Interpersonal Power (MIP), containing 34 Likert-type scales, was administered to 306 students at the University of Nebraska, who were instructed to assess the power of an individual in one of four communication contexts: acquaintance, friend, co-worker, family. A

John P. Garrison; Larry E. Pate

1977-01-01

97

Solar power tower development: Recent experiences  

SciTech Connect

Recent experiences with the 10 MW{sub e} Solar Two and the 2.5 MW{sub t} TSA (Technology Program Solar Air Receiver) demonstration plants are reported. The heat transfer fluids used in these solar power towers are molten-nitrate salt and atmospheric air, respectively. Lessons learned and suggested technology improvements for next-generation plants are categorized according to subsystem. The next steps to be taken in the commercialization process for each these new power plant technologies is also presented.

Tyner, C.; Kolb, G.; Prairie, M. [and others

1996-12-01

98

Solar Central Power Test Facility heliostat development  

Microsoft Academic Search

The SCPTF, Solar Central Power Test Facility, capable of supplying 5 MW(e) energy onto a target on the tower, uses an array of 222 heliostats in a north field configuration. The SCPTF heliostat is described and the performance data gathered to date is discussed. This data led to certain corrections in the computer code HELIOS. (MHR)

Arvizu

1978-01-01

99

OTEC power system development and environmental impacts  

Microsoft Academic Search

The costs, materials, maintainability, and environmental impacts of prospective OTEC plants are reviewed, along with developmental time tables. The plants are noted to cost almost three times per KW installed power as conventional coal or nuclear plants on land, with main expenses derived from the massive heat exchangers, which must necessarily be 500 times the size of those in conventional

N. F. Sather

1980-01-01

100

Development of the NEXT Power Processing Unit.  

National Technical Information Service (NTIS)

Boeing Electron Dynamic Devices, Inc. (EDD) has designed and fabricated a breadboard version of a 6 kW power processing unit (PPU) for gridded ion thrusters. This breadboard PPU will be integrated with an engineering model 40 cm ion engine designed and te...

T. K. Phelps S. Wiseman D. S. Komm T. Bond L. R. Pinero

2005-01-01

101

Development of microcomputer compatible power switches  

NASA Astrophysics Data System (ADS)

A product family comprising three groups of devices called SIPMOS (Siemens Power MOS) is presented. It includes a PMOS transistor with source drain voltages from 50 to 1000 V, a FET-controlled PMOS-thyristor, and a light controlled MOS-fired triac (600 V, trigger current 1mA).

Strack, H.

1983-12-01

102

On the Development of Autonomous Powered Parachute  

Microsoft Academic Search

The powered parachute (PPC)is now the most popular ultra-light flight equipments. The PPC has excellent self stability and is very simple to fly. To extend the PPC's application to some special area, for example, in long time cruise, precision airdrop, and dangerous mission, autonomous flight is required. This paper aims to fulfill such a design. The flight principle of the

Bian Yongqing; Jiang Tao; He Wei

2007-01-01

103

Trends in development of bipolar power transistors  

Microsoft Academic Search

Monolithic integrated circuit technology was applied to bipolar power transistors which included Darlington transistors with preamplification. They are produced with two stabilizing resistors and sometimes also with two diodes for higher switching speed and for overvoltage protection respectively. Darlington transistors have higher current gain than plain silicon transistors of the same size so that they are indispensable for inverters. The

V. A. Potapchuk

1984-01-01

104

Development of Microcomputer Compatible Power Switches.  

National Technical Information Service (NTIS)

A product family comprising three groups of devices called SIPMOS (Siemens Power MOS) is presented. It includes a PMOS transistor with source drain voltages from 50 to 1000 V, a FET-controlled PMOS-thyristor, and a light controlled MOS-fired triac (600 V,...

H. Strack

1983-01-01

105

Development of geothermal power engineering technologies in Russia  

Microsoft Academic Search

The present state of geothermal power engineering in Russia and prospects for its development are considered. An assessment\\u000a is given of the projects of constructing a pilot binary geothermal power plant in Kamchatka, developing geothermal heat supply\\u000a systems in the town of Vilyuchinsk and settlement of Rozovyi, and increasing the installed capacity of the Mutnovsk geothermal\\u000a power station, which are

G. V. Tomarov; A. I. Nikol’skii; V. N. Semenov; A. A. Shipkov

2009-01-01

106

Micro Scale Village Based Dendro Power Development  

Microsoft Academic Search

This paper introduces a renewable energy harnessing technology from fuel wood, which is known as Dendro Power. This is mainly focused for an isolated off-grid village (80-100 households) in intermediate\\/dry zones in Sri Lanka. The contents are based on the survey carried out at Welimuwapothana, Horrowpothana (dry zone), which has been selected as the model of the study. From the

Dilan Perera; Uditha Suduge; Nishantha Nanayakkara

107

Advanced Power Plant Development and Analysis Methodologies  

SciTech Connect

Under the sponsorship of the U.S. Department of Energy/National Energy Technology Laboratory, a multi-disciplinary team led by the Advanced Power and Energy Program of the University of California at Irvine is defining the system engineering issues associated with the integration of key components and subsystems into advanced power plant systems with goals of achieving high efficiency and minimized environmental impact while using fossil fuels. These power plant concepts include 'Zero Emission' power plants and the 'FutureGen' H2 co-production facilities. The study is broken down into three phases. Phase 1 of this study consisted of utilizing advanced technologies that are expected to be available in the 'Vision 21' time frame such as mega scale fuel cell based hybrids. Phase 2 includes current state-of-the-art technologies and those expected to be deployed in the nearer term such as advanced gas turbines and high temperature membranes for separating gas species and advanced gasifier concepts. Phase 3 includes identification of gas turbine based cycles and engine configurations suitable to coal-based gasification applications and the conceptualization of the balance of plant technology, heat integration, and the bottoming cycle for analysis in a future study. Also included in Phase 3 is the task of acquiring/providing turbo-machinery in order to gather turbo-charger performance data that may be used to verify simulation models as well as establishing system design constraints. The results of these various investigations will serve as a guide for the U. S. Department of Energy in identifying the research areas and technologies that warrant further support.

A.D. Rao; G.S. Samuelsen; F.L. Robson; B. Washom; S.G. Berenyi

2006-06-30

108

Advanced Power Plant Development and Analyses Methodologies  

SciTech Connect

Under the sponsorship of the U.S. Department of Energy/National Energy Technology Laboratory, a multi-disciplinary team led by the Advanced Power and Energy Program of the University of California at Irvine is defining the system engineering issues associated with the integration of key components and subsystems into advanced power plant systems with goals of achieving high efficiency and minimized environmental impact while using fossil fuels. These power plant concepts include ''Zero Emission'' power plants and the ''FutureGen'' H{sub 2} co-production facilities. The study is broken down into three phases. Phase 1 of this study consisted of utilizing advanced technologies that are expected to be available in the ''Vision 21'' time frame such as mega scale fuel cell based hybrids. Phase 2 includes current state-of-the-art technologies and those expected to be deployed in the nearer term such as advanced gas turbines and high temperature membranes for separating gas species and advanced gasifier concepts. Phase 3 includes identification of gas turbine based cycles and engine configurations suitable to coal-based gasification applications and the conceptualization of the balance of plant technology, heat integration, and the bottoming cycle for analysis in a future study. Also included in Phase 3 is the task of acquiring/providing turbo-machinery in order to gather turbo-charger performance data that may be used to verify simulation models as well as establishing system design constraints. The results of these various investigations will serve as a guide for the U. S. Department of Energy in identifying the research areas and technologies that warrant further support.

G.S. Samuelsen; A.D. Rao

2006-02-06

109

Development of high power ion sources for fusion (invited)  

Microsoft Academic Search

Recent progress and development activities regarding high power ion sources for fusion researches are reviewed. High power positive ion sources, which have progressed in the 1980s, played important roles in fusion research. Most of the ion sources developed for major neutral beam injection (NBI) systems are a large area magnetic multipole type with tungsten cathode, and produce tens of amperes

Y. Ohara

1998-01-01

110

The DOE/SCS Power Systems Development Facility  

SciTech Connect

The use of coal for power generation has come under increasing environmental scrutiny over the past five years. Advances in coal-based power generation technology will continue to develop towards systems that have high efficiency, environmental superiority and lower or sustainable cost-of-electricity compared to current coal-based technology. Emerging power generation technologies that work toward these goals include integrated gasification combined-cycle (IGCC) and pressurized fluidized-bed combustion (PFBC). One method for improving the efficiency and lowering the capital cost further for advanced power plants utilizing coal is by employing hot gas cleanup. Although hot gas cleanup has the potential for improving the viability of coal-based power generation, the removal of hot particulates from the gas stream has proven to be a challenging task. The demonstration of particulate control devices (PCDS) under realistic conditions for advanced power generation remains the single most important area for development. With the Southern Company`s commitment to be a major supplier of electricity worldwide and our continued use of coal as a primary fuel source, Southern Company Services (SCS) has entered into a cooperative effort with the Department of Energy (DOE) Morgantown Energy Technology Center (METC) to develop a facility where component and system integration tests can be carried out for advanced coal-based power plants. The Power Systems Development Facility (PSDF) is being designed to be a flexible facility that will address the development of the PCDs required for advanced coal-based power generation systems.

Haq, Z.U.; Pinkston, T.E.; Sears, R.E.; Vimalchand, P.

1993-12-31

111

Development of high power CARM oscillators  

NASA Astrophysics Data System (ADS)

The Cyclotron Auto-Resonance Maser (CARM) is under investigation at the US Naval Research Laboratory as an efficient source of high power millimeter-wave and submillimeter-wave radiation for applications such as plasma heating, advanced rf accelerators, and space-based radars. A short-pulse 100 GHz CARM oscillator experiment based on a 600 kV, 200 A, 50 ns electron beam is under way. The mode selective, high-Q waveguide cavity with rippled-wall Bragg reflectors is designed to operate in the TE61 mode. A novel cold cathode diode is used to produce a high quality (??z/?z <= 3%) annular beam with a momentum pitch ratio of 0.6. The cathode features nonemitting focussing electrodes and an annular velvet emitter. The main objective of the experiment is to demonstrate high efficiency (~ 20%) at a power of approximately 20 MW. In addition, a long pulse, 250 GHz, CARM oscillator experiment based on a 500 kV, 100 A, 1 ?s MIG-type thermionic cathode electron gun is planned. The design of these experiments and the optimization of CARM oscillator efficiency are discussed.

Fliflet, A. W.; McCowan, R. B.; Sullivan, C. A.; Kirkpatrick, D. A.; Gold, S. H.; Manheimer, W. M.

1989-12-01

112

Development of cosmic ray hardened power MOSFETs  

SciTech Connect

Developmental power DMOS (double-diffused metal-oxide semiconductor) FETs (field effect transistors) were characterized in a simulated cosmic ray environment using heavy ions at the Brookhaven National Laboratory's tandem Van de Graaff accelerator facility. The primary failure mode encountered on FETS in this environment was susceptibility to single event burnout. Burnout of the power DMOS FET was catastrophic. Another failure mode was single event gate rupture. Although gate rupture is not as severe as burnout, its long-term effects are not known. Single event gate rupture causes performance degradation due to increased gate leakage current. An increase in current can pose serious problems to applications that cannot compensate for the added performance degradation. Long-term reliability of the gate oxide may be affected resulting in premature device failure. Each failure mode is discussed. Numerous processing lots were fabricated to experimentally verify that each failure mode could be successfully minimized. Test results show that an n-channel, 150-volt DMOS FET was fabricated that survived exposures to ions with LETs up to 80 MeV-cm{sup 2}/mg. Hardening approaches are discussed, including the advantages and disadvantages of each approach on the FETs performance.

Titus, J.L. (Naval Weapons Support Center, Advanced Technology Div., Crane, IN (US)); Jamiolkowski, L.S.; Wheatley, C.F. (Harris Semiconductor, Mountaintop, PA (US))

1989-12-01

113

PATHFINDER ATOMIC POWER PLANT STEAM SEPARATOR DEVELOPMENT  

Microsoft Academic Search

Development of a steam separator the Pathfinder Reactor is reported. ; A full-scale separator model was developed through the combination of scale-model ; testing and the application of principles associated with the existing theory of ; centrifugal separation. This model was put through full-scale air-water tests ; which led to modifications and a final design which meets Pathfinder requirements. ;

G. C. Kutsch; D. H. Swanson; H. W. Yant

1962-01-01

114

High Power Density Capacitor Charging Power Supply Development for Repetitive Pulsed Power.  

National Technical Information Service (NTIS)

Power modulators for compact, repetitive systems are continually faced with new requirements as the corresponding system objectives increase. Changes in pulse rate frequency or number of pulses significantly impact the design of the power conditioning sys...

F. E. Peterkin J. A. Pasour M. M. McQuage V. P. McDowell

2006-01-01

115

Geothermal power development: 1984 overview and update  

SciTech Connect

The status of geothermal power plants as of mid-1984 is given. There are 15 countries with active plants, and France (Guadeloupe) is expected to join the roster in the near future. The total number of operating units (defined as individual turbo-generator sets) is 145; the total installed capacity is somewhat less than 3770 MW. If plans for additional plants are met, the total could jump by more than 200 MW over the next two years. Recent growth is presented and the worldwide installed capacity is traced. A graphic portrayal of the growth pattern is presented. The countries that will be most responsible for sustaining this growth are the US, the Philippines, Mexico, and Indonesia. Other countries that will contribute significantly include Italy, Japan, Kenya, Nicaragua, and Turkey. The following countries do not now have any geothermal plants but may bring some online by 1990: Guatemala, Costa Rica, Greece, St. Lucia, Thailand, and Ethiopia.

DiPippo, R.

1984-10-01

116

Current and future developments in diesel powered hovercraft  

Microsoft Academic Search

After evaluating the development status of the application of diesel power to air-cushion vehicles (ACVs) and surface-effect ships (SESs), attention is given to the AP1-88 ACV, which is both the first and largest operational diesel-powered amphibious craft of this type. An account is given of the ACV and SES features that are dictated by the need to accommodate diesel power

J. C. Leonard; M. J. Stevens; J. A. Buttigieg

1989-01-01

117

PFBC perspectives at the Power Systems Development Facility  

Microsoft Academic Search

The use of coal for power generation has come under increasing environmental scrutiny over the past five years. Advances in coal-based power generation technology will develop systems that have high efficiency, environmental superiority and lower cost of electricity compared to current coal-based technology. Advanced pressurized-fluidized-bed combustion (APFBC) is one `of the promising emerging power generation technologies striving to achieve these

D. L. Moore; P. Vimalchand; Z. U. Haq; J. D. McClung; M. T. Quandt

1994-01-01

118

Development of Pulsed Power Modulator for Induction Synchrotron  

NASA Astrophysics Data System (ADS)

A pulsed power modulator for the POP experiment of an induction synchrotron has been developed. Various difficulties in the development of the modulator, such as enormous power dissipation at a MOSFET, the resonant ringing in the output waveform, the isolation from the ground potential, and the incorrect action of a gate driving circuit, have been discussed and solved. The developed power modulator is installed into the existing accelerator, KEK 12GeV proton synchrotron. The POP experiment of the induction synchrotron has been successfully conducted. A single RF bunch injected from the 500 MeV booster ring was accelerated to the flat-top energy of 8 GeV.

Koseki, Kunio; Takayama, Ken

119

Heat engine development for solar thermal power systems  

NASA Astrophysics Data System (ADS)

The parabolic dish solar collector systems for converting sunlight to electrical power through a heat engine will, require a small heat engine of high performance long lifetime to be competitive with conventional power systems. The most promising engine candidates are Stirling, high temperature Brayton, and combined cycle. Engines available in the current market today do not meet these requirements. The development of Stirling and high temperature Brayton for automotive applications was studied which utilizes much of the technology developed in this automotive program for solar power engines. The technical status of the engine candidates is reviewed and the components that may additional development to meet solar thermal system requirements are identified.

Pham, H. Q.; Jaffe, L. D.

120

Photovoltaic power conditioners: Development, evolution, and the next generation  

SciTech Connect

Market-place acceptance of utility-connected photovoltaic (PV) power generation systems and their accelerated installation into residential and commercial applications are heavily dependent upon the ability of their power conditioning subsystems (PCS) to meet high reliability, low cost, and high performance goals. Many PCS development efforts have taken place over the last 15 years, and those efforts have resulted in substantial PCS hardware improvements. These improvements, however, have generally fallen short of meeting many reliability, cost and performance goals. Continuously evolving semiconductor technology developments, coupled with expanded market opportunities for power processing, offer a significant promise of improving PCS reliability, cost and performance, as they are integrated into future PCS designs. This paper revisits past and present development efforts in PCS design, identifies the evolutionary improvements and describes the new opportunities for PCS designs. The new opportunities are arising from the increased availability and capability of semiconductor switching components, smart power devices, and power integrated circuits (PICS).

Bulawka, A. [USDOE, Washington, DC (United States); Krauthamer, S.; Das, R. [Jet Propulsion Lab., Pasadena, CA (United States); Bower, W. [Sandia National Labs., Albuquerque, NM (United States)

1994-07-01

121

Small hydroelectric power development in China  

Microsoft Academic Search

The small hydroelectric development in China is extensive, with more than 90,000 units, but represents a very small resource in terms of total electricity generation (or as little as 4%). In the rural areas, however, small hydro is an important tool for modernization and represents a substantial percentage (30%) of the electricity. Its characteristics - simplicity, reliability, and low cost

Skidmore

1980-01-01

122

Power Systems Development Facility: Design, Construction, and Commissioning Status  

SciTech Connect

This paper will provide an introduction to the Power Systems Development Facility, a Department of Energy sponsored, engineering scale demonstration of two advanced coal-fired power technologies; and discuss current status of design, construction and commissioning of this facility. 28 viewgraphs, including 2 figs.

Powell, C.A.; Vimalchand; Hendrix, H.L.; Honeycut, P.M.

1996-12-31

123

Development of fuzzy logic power system stabilizer and further studies  

Microsoft Academic Search

During the last several years, we have been working on the development of a fuzzy logic power system stabilizer to enhance the damping of generator oscillations as a joint research work between Kumamoto University and the Kyushu Electric Power Co. Through simulation studies and also experimental studies on a 5 kVA laboratory system, several hydro units in the Kyushu Electric

Takashi Hiyama

1999-01-01

124

Nuclear Power in Developing Countries: The Transfer of Regulatory Capability  

Microsoft Academic Search

By 1985, 17 developing countries will each have at least one nuclear power plant in operation The natural desire of these countries to acquire some capability in the implementation of nuclear power projects, requires that special emphasis be given to pro- grammes for the transfer of industrial technology. This, however, can detract attention from a vital area of technology transfer

M. Rosen

125

Further developments in LP-based optimal power flow  

Microsoft Academic Search

The authors describe developments that have transformed the LP (linear programming) approach into a truly general-purpose OPF (optimal power flow) solver, with computational and other advantages over even recent nonlinear programming (NLP) methods. it is pointed out that the nonseparable loss-minimization problem can now be solved, giving the same results as NLP on power systems of any size and type.

O. Alsac; J. Bright; M. Prais; B. P Stott

1990-01-01

126

Development and fabrication of improved power transistor switches  

Microsoft Academic Search

A new class of high-voltage power transistors has been achieved by adapting present interdigitated thyristor processing techniques to the fabrication of NPN Si transistors. Present devices are 2.3 cm in diameter. The electrical performance obtained is consistent with the predictions of an optimum design theory specifically developed for power switching transistors. The forward safe operating area of the experimental transistors

P. L. Hower; C. K. Chu

1976-01-01

127

Nuclear Power - Status and Development 1986/1987.  

National Technical Information Service (NTIS)

A review og the present global position of nuclear power is given. Topics as nuclear power in developing countries, operation experience for the Super Phenix reactor, and the long-term consequences of the Chernobyl reactor accident are briefly dealt with....

R. O. Lingjaerde

1987-01-01

128

Development of an efficient photovoltaic maximum power point tracking controller  

Microsoft Academic Search

A high performance boost converter for maximum power point tracking (MPPT) of photovoltaic (PV) systems is presented. The proposed boost converter uses a new active snubber to minimize losses in the switching and improve efficiency of the converter. For tracking the maximum power point of a PV array, a closed loop fuzzy logic based MPPT controller has been developed. The

Subiyanto; Azah Mohamed; MA Hannan

2011-01-01

129

Development of an IGCC power plant simulator: Final report  

Microsoft Academic Search

This report provides the results of the Electric Power Research Institute project to develop a dynamic simulator for Integrated Coal Gasification Combined Cycle (IGCC) power plants. With the introduction of commercial chemical process-oriented technology into the utility industry, there was a need for better computer-based project design tools to be used from conceptual design through commercial operation. A major project

Rovnak

1989-01-01

130

Design and development of a constant current power source  

Microsoft Academic Search

The design and development of a low cost, lab built constant current power source to be used in the DC electrical resistivity testing of high temperature superconductors is described. The power source must generate a test current which varies little if at all as the load resistance RL of a cuprate superconductor sample varies from about 2,phi at room temperature

William Mendoza

2005-01-01

131

Practical superconductor development for electrical power applications  

SciTech Connect

Development of useful high-critical-temperature (high-{Tc}) superconductors requires synthesis of superconducting compounds; fabrication of wires, tapes, and films from these compounds; production of composite structures that incorporate stabilizers or insulators; and design and testing of efficient components. This report describes technical progress of research and development efforts aimed at producing superconducting components based on the Y-Ba-Cu, Bi-Sr-Ca-Cu, Bi-Pb-Sr-Ca-Cu, and Tl-Ba-Ca-Cu oxides systems. Topics discussed are synthesis and heat treatment of high-{Tc} superconductors, formation of monolithic and composite wires and tapes, superconductor/metal connectors, characterization of structures and superconducting and mechanical properties, and fabrication and properties of thin films. Collaborations with industry and academia are also documented. 10 figs.

Goretta, K.C. (comp.)

1991-10-01

132

Technological implications of SNAP reactor power system development on future space nuclear power systems  

SciTech Connect

Nuclear reactor systems are one method of satisfying space mission power needs. The development of such systems must proceed on a path consistent with mission needs and schedules. This path, or technology roadmap, starts from the power system technology data base available today. Much of this data base was established during the 1960s and early 1970s, when government and industry developed space nuclear reactor systems for steady-state power and propulsion. One of the largest development programs was the Systems for Nuclear Auxiliary Power (SNAP) Program. By the early 1970s, a technology base had evolved from this program at the system, subsystem, and component levels. There are many implications of this technology base on future reactor power systems. A review of this base highlights the need for performing a power system technology and mission overview study. Such a study is currently being performed by Rockwell's Energy Systems Group for the Department of Energy and will assess power system capabilities versus mission needs, considering development, schedule, and cost implications. The end product of the study will be a technology roadmap to guide reactor power system development.

Anderson, R.V.

1982-11-16

133

PFBC perspectives at the Power Systems Development Facility  

SciTech Connect

The use of coal for power generation has come under increasing environmental scrutiny over the past five years. Advances in coal-based power generation technology will develop systems that have high efficiency, environmental superiority and lower cost of electricity compared to current coal-based technology. Advanced pressurized-fluidized-bed combustion (APFBC) is one `of the promising emerging power generation technologies striving to achieve these goals. One method of improving the efficiency and lowering the capital cost further for advanced power plants utilizing coal is by employing hot gas cleanup. Although hot gas cleanup has the potential for improving the viability of coal-based power generation, the removal of hot particulates from the gas stream has proven to be a challenging task. The demonstration of APFBC technology and the particulate control devices (PCDs) under realistic conditions for advanced power generation remain important areas for development. The Power Systems Development Facility (PSDF) is being designed to be a flexible facility that will address the development of the PCDs and an advanced second-generation PFBC technology. With the progress made in the last decade, the basic concepts of PFBC technology can be achieved through a number of different flowsheets and reactor configurations. The choices made in developing the flowsheets and the choices made in designing the equipment in order to improve the reliability of operation may well dictate, along with the actual data from operation, the process efficiencies and the capital costs that can be achieved.

Moore, D.L.; Vimalchand, P.; Haq, Z.U. [Southern Co. Services, Inc., Birmingham, AL (United States); McClung, J.D. [Foster Wheeler Development Corp., Livingston, NJ (United States); Quandt, M.T. [Foster Wheeler Energy Corp., Clinton, NJ (United States)

1994-06-01

134

Solar power developer feels its technology is cost competitive  

SciTech Connect

This paper reports on a solar power developer which believes that it has a cost-competitive solar power technology. Right now, more than 90% of the world's operating solar-powered electric generating capacity is located in the Los-Angeles-based company's privately financed solar-thermal plants currently operating on the Southern California Edison system. It has 274 MW of qualifying-facility, small-power solar capacity in operation in eight plants. They are expected to produce 700 million kWh this year, equal to an annual capacity factor of about 29%. The solar technology uses supplemental firing of natural gas.

Smock, R.W.

1990-07-01

135

Development of a General Purpose Power System Control Board  

SciTech Connect

In an effort to control modern solid state power modules, a general purpose, multi function power system control board (PSCB) has been under development as a collaboration project between Pohang Accelerator Laboratory (PAL), Korea, and Stanford Linear Accelerator Center (SLAC), USA. The PSCB is an embedded, interlock supervisory, diagnostic, timing, and set-point control board. It is designed to use in various power systems such as sequenced kicker pulsers, solid state RF modulators, simple DC magnet power supplies, etc. The PSCB has the Ethernet communication with the TCP/IP Modbus protocol.

Nam, S.H.; Jeong, S.H.; Kim, S.H.; Kim, S.C.; Park, S.S.; Suh, J.H.; /Pohang Accelerator Lab.; Bellomo, P.; Cassel, R.; Larsen, R.; Nguyen, M.N.; /SLAC

2007-07-23

136

Developement of an Interactive Power System Research Simulator  

Microsoft Academic Search

An interactive power system research simulator is described which has been developed specifically for interactive computation on time-sharing computer systems with high-speed cathode-ray tube (CRT)\\/printer interfaces.

A. Keyhani

1984-01-01

137

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gate ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gate House, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

138

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

139

Development of Thin-Film Battery Powered Transdermal Medical Devices  

SciTech Connect

Research carried out at ORNL has led to the development of solid state thin-film rechargeable lithium and lithium-ion batteries. These unique devices can be fabricated in a variety of shapes and to any required size, large or small, on virtually any type of substrate. Because they have high energies per unit of volume and mass and because they are rechargeable, thin-film lithium batteries have potentially many applications as small power supplies in consumer and special electronic products. Initially, the objective of this project was to develop thin-film battery powered products. Initially, the objective of this project was to develop thin-film battery powered transdermal electrodes for recording electrocardiograms and electroencephalograms. These ''active'' electrode would eliminate the effect of interference and improve the reliability in diagnosing heart or brain malfunctions. Work in the second phase of this project was directed at the development of thin-film battery powered implantable defibrillators.

Bates, J.B.; Sein, T.

1999-07-06

140

Hydro-power development in remote locations of developing countries  

NASA Astrophysics Data System (ADS)

In many developing countries hydropower can be used to replace the consumption of imported oil. The economic advantage of using hydropower increases if a low cost, locally manufactured turbine, called the cross flow turbine, can be used. This paper discusses the technical design and use of the cross flow turbine in the context of a hydroelectric development project in Africa.

Smith, Granville J.

1985-11-01

141

Development of geothermal power engineering technologies in Russia  

NASA Astrophysics Data System (ADS)

The present state of geothermal power engineering in Russia and prospects for its development are considered. An assessment is given of the projects of constructing a pilot binary geothermal power plant in Kamchatka, developing geothermal heat supply systems in the town of Vilyuchinsk and settlement of Rozovyi, and increasing the installed capacity of the Mutnovsk geothermal power station, which are the top-priority projects implemented by OAO RusGidro with scientific and technical support from ZAO GEOINKOM and ZAO Geoterm-EM.

Tomarov, G. V.; Nikol'Skii, A. I.; Semenov, V. N.; Shipkov, A. A.

2009-11-01

142

Development of an analytical tool to study power quality of ac power systems for large spacecraft  

NASA Astrophysics Data System (ADS)

A harmonic power flow program applicable to space power systems with sources of harmonic distortion is described. The algorithm is a modification of Electric Power Research Institute's HARMFLO program which assumes a three-phase, balanced, ac system with loads of harmonic distortion. The modified power flow program can be used with single phase, ac systems. Early results indicate that the required modifications and the models developed are quite adequate for the analysis of a 20-kHz testbed built by General Dynamics Corporation. This is demonstrated by the acceptable correlation of the present results with published data. Although the results are not exact, the discrepancies are relatively small.

Kraft, L. A.; Kankam, M. D.

143

Development status of the small community solar power system  

NASA Astrophysics Data System (ADS)

The development status and test results for the Small Community Solar Thermal Power Experiment are presented. Activities on the phase 2 power module development effort are presented with emphasis on the receiver, the plant control subsystem, and the energy transport subsystem. The components include a single prototype power module consisting of a parabolic dish concentrator, a power conversion assembly (PCA), and a multiple-module plant control subsystem. The PCA consists of a cavity receiver coupled to an organic Rankine cycle engine-alternator unit defined as the power conversion subsystem; the PCA is mounted at the focus of a parabolic dish concentrator. At a solar insolation of 100 W/sq m and ambient temperature of 28 C (82 F), the power module produces approximately 20 kW of 3-phase, 3 kHz ac power, depending on the concentrator employed. A ground-mounted rectifier to the central collection site where it is supplied directly to the common dc bus which collects the power from all modules in the plant.

Pons, R. L.

1982-07-01

144

Development of a 55 kw diesel powered auxiliary power unit for hybrid electric vehicles. Interim report  

Microsoft Academic Search

Three auxillary power units (APU) were developed for military hybrid vehicle applications with funding from DARPA. One APU was for the electric M113 troop carrier originally converted to electric power in the 1960`s. The other two APU`s developed during this project were for hybrid electric High Mobility Multipurpose Wheeled Vehicle (HMMWV) projects. For this APU design a Volkswagen 1.5-1 diesel

W. E. Likos; D. J. Podnar; J. A. Smith; J. Steiber

1998-01-01

145

Development of ceramic superconductors for electric power applications  

SciTech Connect

The U.S. Department of Energy supports an applied superconductivity program entitled {open_quotes}Superconductivity Program for Electric Power Systems.{close_quotes} Activities under this program are designed to help develop the high-temperature superconductor (HTS) technology that is needed for industry to proceed with the commercial development of electric power applications. Research is conducted in three categories: wire development, systems technology development, and Superconductivity Partnership Initiative (SPI). Wire development activities are devoted to improving the critical current density (J{sub c}) of short-length HTS wire, whereas activities in systems technology development focus on fabrication of long-length wires, coils, and magnets. Finally, SPI activities focus on the development of prototypes that consist of a generator coil, a fault current limiter, a transmission cable, and a motor. A current overview and recent progress in the development of HTSs are outlined in this paper. 48 refs., 6 figs.

Balachandran, U.

1997-03-01

146

Ultra-low power microwave CHFET integrated circuit development  

SciTech Connect

This report summarizes work on the development of ultra-low power microwave CHFET integrated circuit development. Power consumption of microwave circuits has been reduced by factors of 50--1,000 over commercially available circuits. Positive threshold field effect transistors (nJFETs and PHEMTs) have been used to design and fabricate microwave circuits with power levels of 1 milliwatt or less. 0.7 {micro}m gate nJFETs are suitable for both digital CHFET integrated circuits as well as low power microwave circuits. Both hybrid amplifiers and MMICs were demonstrated at the 1 mW level at 2.4 GHz. Advanced devices were also developed and characterized for even lower power levels. Amplifiers with 0.3 {micro}m JFETs were simulated with 8--10 dB gain down to power levels of 250 microwatts ({mu}W). However 0.25 {micro}m PHEMTs proved superior to the JFETs with amplifier gain of 8 dB at 217 MHz and 50 {mu}W power levels but they are not integrable with the digital CHFET technology.

Baca, A.G.; Hietala, V.M.; Greenway, D.; Sloan, L.R.; Shul, R.J.; Muyshondt, G.P.; Dubbert, D.F.

1998-04-01

147

Development of the fuel cell power generation technology, 2  

NASA Astrophysics Data System (ADS)

NEDO arranged results of the research on the development of the fuel cell power generation technology during fiscal 1981 to 1987. During 1981 to 1983, research and development were made on a dispersed generation type fuel cell power generation system using phosphoric acid fuel cells (low temperature/pressure type) and a thermal power plant substitution type fuel cell power generation system (high temperature/pressure type). During 1984 to 1986, in addition to the above, research was made on a total system of phosphoric acid fuel cells, trial operation of a molten carbonate fuel cell power plant (matrix electrolyte method, paste electrolyte method) and a total system. In 1987, as to molten carbonate fuel cells, researches were made on stacks and a peripheral system, support, and a total system. As a comprehensive technology development of phosphoric acid fuel cells, researches were made on a fuel cell power generation system for isolated island use and a fuel cell power generation system for business use.

1994-02-01

148

Innovation on Energy Power Technology (13)Development of Geothermal Power Generating Facilities  

NASA Astrophysics Data System (ADS)

The geothermal power generating facilities that utilize the geothermal energy from the earth are environment-friendly, because they scarcely emit the greenhouse gases such as carbon dioxide (CO2) or the environmental pollution substances such as nitrogen oxides (NOx) and sulfur oxides (SOx). On the other hand, they should work swallowing the geothermal steam that contains much amount of chemical impurities such as hydrogen sulfides (H2S), sulfates (SO42-), chlorides (Cl-), silica (SiO2), etc. Therefore, it is not too much to say that the geothermal power generation is a fight against the chemical impurities. Since the first practical geothermal power generating facility in Japan began operating with a small capacity of 30kW in 1960 at Hakone Kowakien, Japanese manufacturers have been developing geothermal power generating facilities and supplying them worldwide. The geothermal power generation is one of the technical challenges that gives a hope for a sustainable development of the human society.

Sakai, Yoshihiro

149

Development of a linear piston-type pulse power electric generator for powering electric guns  

NASA Astrophysics Data System (ADS)

The development of a linear piston-type electric pulse-power generator capable of powering electric guns and EM (rail and coil) guns and ET guns, presently under development, is discussed. The pulse-power generator consists of a cylindrical armature pushed by gases from the combustion of fuel or propellant through an externally produced magnetic field. An arrangement of electrodes and connecting straps serves to extract current from the moving armature and to send it to an external load (the electric gun).

Summerfield, Martin

1993-01-01

150

Developing maximal neuromuscular power: part 2 - training considerations for improving maximal power production.  

PubMed

This series of reviews focuses on the most important neuromuscular function in many sport performances: the ability to generate maximal muscular power. Part 1, published in an earlier issue of Sports Medicine, focused on the factors that affect maximal power production while part 2 explores the practical application of these findings by reviewing the scientific literature relevant to the development of training programmes that most effectively enhance maximal power production. The ability to generate maximal power during complex motor skills is of paramount importance to successful athletic performance across many sports. A crucial issue faced by scientists and coaches is the development of effective and efficient training programmes that improve maximal power production in dynamic, multi-joint movements. Such training is referred to as 'power training' for the purposes of this review. Although further research is required in order to gain a deeper understanding of the optimal training techniques for maximizing power in complex, sports-specific movements and the precise mechanisms underlying adaptation, several key conclusions can be drawn from this review. First, a fundamental relationship exists between strength and power, which dictates that an individual cannot possess a high level of power without first being relatively strong. Thus, enhancing and maintaining maximal strength is essential when considering the long-term development of power. Second, consideration of movement pattern, load and velocity specificity is essential when designing power training programmes. Ballistic, plyometric and weightlifting exercises can be used effectively as primary exercises within a power training programme that enhances maximal power. The loads applied to these exercises will depend on the specific requirements of each particular sport and the type of movement being trained. The use of ballistic exercises with loads ranging from 0% to 50% of one-repetition maximum (1RM) and/or weightlifting exercises performed with loads ranging from 50% to 90% of 1RM appears to be the most potent loading stimulus for improving maximal power in complex movements. Furthermore, plyometric exercises should involve stretch rates as well as stretch loads that are similar to those encountered in each specific sport and involve little to no external resistance. These loading conditions allow for superior transfer to performance because they require similar movement velocities to those typically encountered in sport. Third, it is vital to consider the individual athlete's window of adaptation (i.e. the magnitude of potential for improvement) for each neuromuscular factor contributing to maximal power production when developing an effective and efficient power training programme. A training programme that focuses on the least developed factor contributing to maximal power will prompt the greatest neuromuscular adaptations and therefore result in superior performance improvements for that individual. Finally, a key consideration for the long-term development of an athlete's maximal power production capacity is the need for an integration of numerous power training techniques. This integration allows for variation within power meso-/micro-cycles while still maintaining specificity, which is theorized to lead to the greatest long-term improvement in maximal power. PMID:21244105

Cormie, Prue; McGuigan, Michael R; Newton, Robert U

2011-02-01

151

Development of multiple beam guns for high power RF sources  

NASA Astrophysics Data System (ADS)

The next generation of accelerators will require RF sources producing many megawatts of RF power. Typically, such sources operate at voltages exceeding several hundred kV, requiring pulse modulators and significant amounts of x-ray shielding. In addition, electrical circuits must be designed to handle the high electrical stresses imposed by such high voltages. Multiple beam guns allow for dramatic reduction in the operating voltage while still allowing generation of high RF power levels. These devices have been developed for power levels up to several megawatts; however, significantly higher RF power levels will be required for new accelerators. This paper describes a program to extend the power level of multiple beam devices above 50 MW using doubly convergent electron guns with confined flow focusing. .

Ives, Lawrence; Miram, George

2001-05-01

152

Problems and concepts of the development of solar power satellites  

NASA Astrophysics Data System (ADS)

Solar radiation is a renewable and ecologically pure source of energy. The amount of solar power is huge but the use of that power for the production of electricity involves great difficulties, the major ones being the low density of solar radiation on the Earth's surface and the impermanent nature of that radiation (clouded skies, nighttime). A certain way to overcome those obstacles are the already developed energy accumulators and the combined solar-thermal energy systems, as well as the devices concentrating solar power and increasing its density. Unfortunately, these solutions are not widely applicable and are not competitive to conventional electric power stations. However, giving up ground-based solar electric power stations and placing them in a geosynchronous or low equatorial orbit would produce essentially different results.

Zamfirov, Milen

153

Cold cathode thyratron development for pulsed power applications  

Microsoft Academic Search

The paper presents an overview on the current status of the development of the so called pseudospark switches. The pseudospark itself is characterized as a low pressure gas discharge located on the left branch of the Paschen curve. Based on this discharge a family of fast gas discharge closing switches for pulsed power applications have been developed at Erlangen for

A. Urban; Klaus Frank

2002-01-01

154

Development of molten carbonate fuel cell power plant technology  

Microsoft Academic Search

During this quarter, effort was continued in all four major task areas: system studies to define the reference power plant design; cell and stack design, development and verification; preparation for fabrication and testing of the full-scale prototype stack; and developing the capability for operation of stacks on coal-derived gas. Preliminary module and cell stack design requirements were completed. Fuel processor

H. C. Healy; R. A. Sanderson; F. J. Wertheim; P. F. Farris; A. P. Mientek; D. L. Maricle; T. A. Briggs; J. L. Preston Jr.; G. A. Louis; M. L. Abrams

1980-01-01

155

The environment power system analysis tool development program  

NASA Astrophysics Data System (ADS)

The Environment Power System Analysis Tool (EPSAT) is being developed to provide space power system design engineers with an analysis tool for determining system performance of power systems in both naturally occurring and self-induced environments. The program is producing an easy to use computer aided engineering (CAE) tool general enough to provide a vehicle for technology transfer from space scientists and engineers to power system design engineers. The results of the project after two years of a three year development program are given. The EPSAT approach separates the CAE tool into three distinct functional units: a modern user interface to present information, a data dictionary interpreter to coordinate analysis; and a data base for storing system designs and results of analysis.

Jongeward, Gary A.; Kuharski, Robert A.; Kennedy, Eric M.; Stevens, N. John; Putnam, Rand M.; Roche, James C.; Wilcox, Katherine G.

1990-12-01

156

Development status of the NSTAR ion propulsion system power processor  

Microsoft Academic Search

A 0.5-2.3 kW xenon ion propulsion system is presently being developed under the NASA Solar Electric Propulsion Technology Application Readiness (NSTAR) program. This propulsion system includes a 30 cm diameter xenon ion thruster, a Digital Control Interface Unit, a xenon feed system, and a power processing unit (PPU). The PPU consists of the power supply assemblies which operate the thruster

John A. Hamley; Luis R. Pinero; Vincent K. Rawlin; John R. Miller; Kevin C. Cartier; Glen E. Bowers

1995-01-01

157

Air Force Research Laboratory high power electric propulsion technology development  

Microsoft Academic Search

Space solar power generation systems have a significant impact on Electric Propulsion (EP) technology development.1,2,3 Recent advances in solar cell, deployment, and concentrator hardware have led to significant reductions in component mass, thereby decreasing power generation system specific mass. Combined with maneuvering requirements for Air Force and DoD missions of interest, propulsive requirements emerge that provide direction for technology investments.

Daniel L. Brown; Brian E. Beal; James M. Haas

2010-01-01

158

Space Solar Dynamic Power Systems Status and Development  

Microsoft Academic Search

An analysis and design trade study was conducted to compare different solar dynamic power systems(SDPS) for space missions application. Closed Brayton Cycle(CBC), alkali-metal Rankine Cycle(RC), free-piston Stirling Cycle(SC) and cogeneration cycles were evaluated and also compared with each other. Conceptual designs were developed for cogeneration cycles of CBC combining with Organic RC or new two-phase power cycle, the Organic RC

Bin Wu; Yu-ming Xing

2010-01-01

159

Geothermal Power Development Resource Evaluation Aspects for Kyushu Electric Power Co., Inc., Fukuoka, Japan  

SciTech Connect

This report is a limited review of and presents comments on the geothermal resource exploration program of Kyushu Electric Power Company (KEPCO). This program is for developing geothermal resources to generate electric power on Kyushu Island, Japan. Many organizations in Japan and in particular Kyushu Electric Power Co., Inc. are actively exploring for and developing geothermal resources on Kyushu Island. KEPCO has already demonstrated an ability and expertise to explore for geothermal resources by their successful exploration and subsequent development of several fields (Hatchobaru and Otake) on the island of Kyushu for electric power generation. The review and comments are made relative to the geothermal resource aspects of Kyushu Electric Power Company's geothermal exploration program, and within the time, budget, and scope of the Rogers Engineering's effort under the existing contract. Rogers and its consultants have had a wide variety of geothermal exploration experience and have used such experience in the analysis of what has been presented by KEPCO. The remainder of the introduction section develops general knowledge concerning geothermal power development with particular emphasis on the resource exploration. The data received section describes the information available to perform the project work. There are no interpretative parts to the data received section. The philosophy section relates our understanding of the KEPCO thinking and conditions surrounding current geothermal resource development in Japan. The survey and methods sections presents three important items about each study KEPCO has performed in the resource exploration program. These three aspects are: what should be obtained from the method, what data was obtained and presented, and what is a review and analysis of where the KEPCO exploration program is currently in terms of progress and successful location of reservoirs. The final section presents recommendations on the many aspects of the resource exploration for geothermal power development.

None

1980-10-30

160

Development status of the NSTAR ion propulsion system power processor  

NASA Astrophysics Data System (ADS)

A 0.5-2.3 kW xenon ion propulsion system is presently being developed under the NASA Solar Electric Propulsion Technology Application Readiness (NSTAR) program. This propulsion system includes a 30 cm diameter xenon ion thruster, a Digital Control Interface Unit, a xenon feed system, and a power processing unit (PPU). The PPU consists of the power supply assemblies which operate the thruster neutralizer, main discharge chamber, and ion optics. Also included are recycle logic and a digital microcontroller. The neutralizer and discharge power supplies employ a dual use configuration which combines the functions of two power supplies into one, significantly simplifying the PPU. Further simplification was realized by implementing a single thruster control loop which regulates the beam current via the discharge current. Continuous throttling is possible over a 0.5-2.3 kW output power range. All three power supplies have been fabricated and tested with resistive loads, and have been combined into a single breadboard unit with the recycle logic and microcontroller. All line and load regulation test results show the power supplies to be within the NSTAR flight PPU specified power output of 1.98 kW. The overall efficiency of the PPU, calculated as the combined efficiencies of the power supplies and controller, at 2.3 kW delivered to resistive loads was 0.90. The component was 6.16 kg. Integration testing of the neutralizer and discharge power supplies with a functional model thruster revealed no issues with discharge ignition or steady state operation.

Hamley, John A.; Pinero, Luis R.; Rawlin, Vincent K.; Miller, John R.; Cartier, Kevin C.; Bowers, Glen E.

1995-10-01

161

Development of the SCRF Power Coupler for the APT Accelerator  

SciTech Connect

The team responsible for the design of the Accelerator Production of Tritium (APT) superconducting (SC) radio frequency (RF) power coupler has developed two 700-MHz, helium gas-cooled power couplers. One has a fixed inner conductor and the other has an adjustable inner conductor (gamma prototype and alpha prototype). The power couplers will be performance tested in the near future. This paper discusses the mechanical design and fabrication techniques employed in the development of each power coupler. This includes material selection, copper coating, assembly sequences, and metal joining procedures, as well as the engineering analyses performed to determine the dynamic response of the inner conductors due to environmental excitations. A bellows is used in both prototype inner conductors in the area near the ceramic RF window, to compensate for thermal expansion and mechanical tolerance build-up. In addition, a bellows is used near the tip of the inner conductor of the alpha prototype for running the power coupler after it is installed on the accelerator. Extensive analytical work has been performed to determine the static loads transmitted by the bellows due to thermally induced expansion on the inner conductor and on the RF window. This paper also discusses this analysis, as well as the mechanical analysis performed to determine the final geometric shape of the bellows. Finally, a discussion of the electromagnetic analysis used to optimize the performance of the power couplers is included.

Schmierer, E.N.; Lujan, R.E.; Rusnak, B.; Smith, B.; Haynes, W.B.; Gautier, C.; Waynert, J.A.; Krawczyk, F.; Gioia, J.

1999-03-01

162

Middle Eastern power systems; Present and future developments  

SciTech Connect

Middle Eastern Power systems have evolved independently of each other over many decades. The region covers a wide geographical area of over 4 million square kilometers with an estimated population in 1990 of over 120 million people. This paper discusses the present status and future power system developments in the Middle East with emphasis on the Mashrequ Arab Countries (MAC). MAC consists of Egypt, Iraq, Jordan, Lebanon, Syria, Yemen, and the six Gulf Cooperation Council (GCC) countries, namely, Bahrain, Kuwait, Qatar, Saudi Arabia, Oman, and the United Arab Emirates (UAE). Interconnections within MAC and possible extensions to Turkey, Europe, and Central Africa are discussed. A common characteristic of the MAC power systems is that they are all operated by government or semi-government bodies. The energy resources in the region are varied. Countries such as Iraq, Egypt, and Syria have significant hydro power resources. On the other hand, the GCC countries and Iraq have abundant fossil fuel reserves.

Not Available

1992-06-01

163

Development of molten carbonate fuel cell power plant, volume 1  

NASA Astrophysics Data System (ADS)

The technical results of a molten carbonate fuel cell power plant evelopment program are presented which establish the necessary technology base and demonstrate readiness to proceed with the fabrication and test of full size prototype stacks for coal fueled molten carbonate fuel cell power plants. The effort covered power plant systems studies, fuel cell component technology development, fuel cell stack design and analysis, manufacturing process definition, and an extensive experimental program. The reported results include: the definition and projected costs for a reference coal fueled power plant system based on user requirements, state-of-the-art advances in anode and electrolyte matrix technology, the detailed description of an internally manifolded stack design concept offering a number of attractive advantages, and the specification of the fabrication processes and methods necessary to produce and assemble this design. Results from the experimental program are documented.

1985-03-01

164

A Practical Approach to Starting Fission Surface Power Development  

SciTech Connect

The Prometheus Power and Propulsion Program has been reformulated to address NASA needs relative to lunar and Mars exploration. Emphasis has switched from the Jupiter Icy Moons Orbiter (JIMO) flight system development to more generalized technology development addressing Fission Surface Power (FSP) and Nuclear Thermal Propulsion (NTP). Current NASA budget priorities and the deferred mission need date for nuclear systems prohibit a fully funded reactor Flight Development Program. However, a modestly funded Advanced Technology Program can and should be conducted to reduce the risk and cost of future flight systems. A potential road-map for FSP technology development leading to possible flight applications could include three elements: 1) Conceptual Design Studies, 2) Advanced Component Technology, and 3) Non-Nuclear System Testing. The Conceptual Design Studies would expand on recent NASA and DOE analyses while increasing the depth of study in areas of greatest uncertainty such as reactor integration and human-rated shielding. The Advanced Component Technology element would address the major technology risks through development and testing of reactor fuels, structural materials, primary loop components, shielding, power conversion, heat rejection, and power management and distribution (PMAD). The Non-Nuclear System Testing would provide a modular, technology test-bed to investigate and resolve system integration issues. (author)

Mason, Lee [NASA Glenn Research Center, 21000 Brook Park Road, Cleveland, Ohio 44135 (United States)

2006-07-01

165

Binary Cycle Geothermal Demonstration Power Plant New Developments  

Microsoft Academic Search

San Diego Gas and Electric Company (SDG and E) has been associated with geothermal exploration and development in the Imperial Valley since 1971. SDG and E currently has interests in the four geothermal reservoirs shown. Major SDG and E activities have included drilling and flow testing geothermal exploration wells, feasibility and process flow studies, small-scale field testing of power processes

Robert G. Lacy; William O. Jacobson

1980-01-01

166

Development path of low aspect ratio tokamak power plants  

Microsoft Academic Search

Recent advances in tokamak physics indicate that a spherical tokamak may offer a magnetic fusion development path that can be started with a small size pilot plant and progress smoothly to larger power plants. Full calculations of stability to kink and ballooning modes show the possibility of greater than 50% ?-toroidal with the normalized ? [?N=?T\\/(I\\/a?)] as high as 10

R. D. Stambaugh; V. S. Chan; R. L. Miller; P. M. Anderson; H. K. Chiu; S. C. Chiu; C. B. Forest; C. M. Greenfield; T. H. Jensen; R. J. La Haye; L. L. Lao; Y. R. Lin-Liu; A. Nerem; R. Prater; P. A. Politzer; H. S. T. JOHN; M. J. Schaffer; G. M. Staebler; T. S. Taylor; A. D. Turnbull; C. P. C. Wong

1998-01-01

167

Development path of low aspect ratio tokamak power plants  

Microsoft Academic Search

Recent advances in tokamak physics indicate the spherical tokamak may offer a magnetic fusion development path that can be started with a small size pilot plant and progress smoothly to larger power plants. Full calculations of stability to kink and ballooning modes show the possibility of greater than 50% beta toroidal with the normalized beta as high as 10 and

R. D. Stambaugh; V. S. Chan; R. L. Miller

1997-01-01

168

The Hazards Posed by the Global Development of Nuclear Power  

ERIC Educational Resources Information Center

|Outlines the growth in the demand for energy on a world-wide basis. Reviews the development of nuclear power and points out the many hazards in the nuclear fuel cycle. Describes the nature of nuclear wastes and explains the quantities involved and the current techniques for waste disposal. (GS)|

O'Reilly, S. A.

1976-01-01

169

Developments in Spousal Power Relations: Are We Moving Toward Equality?  

Microsoft Academic Search

We present an analysis of developments in perceptions of spousal power relations, as reflected in decision-making and division of household labor. Based on research conducted from as early as the 1960s to the present, we analyzed theoretical approaches ranging from the classic resource theories and gender role ideology to more complex approaches. We also examined contextual factors that may impact

Liat Kulik

2011-01-01

170

Improving server power management in research and development data centers  

Microsoft Academic Search

Research data centers are often composed of thousands of diverse computer systems used for ongoing research, development, software regression and hardware compatibility testing. The usage patterns of many of these systems result in periodic non-use and extended periods of idleness. Users routinely fail to ensure that idle machines are powered down prior to overnight or extended absence periods. The annual

Chris Hyser; Daniel Gmach; Umesh Ml; Yuan Chen; Vijay Suryanarayana

2011-01-01

171

Power sector reform in developing countries: mismatched agendas  

Microsoft Academic Search

Power sector reform is rapidly spreading across all corners of the developing world at an alarmingly rapid pace. While the rationales for reform seem to have gained acceptance among the stakeholders, the reform model and process are contested. This paper examines the impacts of reform using the promised outcomes as a basis for analysis. The ability of reform to meet

Njeri Wamukonya

2003-01-01

172

Development of a solar-powered passive ejector cooling system  

Microsoft Academic Search

This paper describes the development of an ejector refrigeration system that is powered by solar thermal energy. The cooling system contains no active parts and is therefore deemed passive. Water is used as the refrigerant though other natural refrigerants could be used for lower temperature operation. A prototype system was built with a nominal cooling capacity of 7 kW. This

V. M Nguyen; S. B Riffat; P. S Doherty

2001-01-01

173

The Hazards Posed by the Global Development of Nuclear Power  

ERIC Educational Resources Information Center

Outlines the growth in the demand for energy on a world-wide basis. Reviews the development of nuclear power and points out the many hazards in the nuclear fuel cycle. Describes the nature of nuclear wastes and explains the quantities involved and the current techniques for waste disposal. (GS)

O'Reilly, S. A.

1976-01-01

174

High-power microwave source development at Los Alamos  

SciTech Connect

Experimental research is under way at Los Alamos to develop the large-orbit gyrotron and the resonant-cavity virtual cathode oscillator as very high power microwave sources. These sources, though still in an early stage of development, have demonstrated power outputs from the several hundred megawatt to the gigawatt level at various Laboratories. These devices exhibit very narrow band output, making them candidates for future accelerator drivers. Our efforts are directed toward achieving repetitively pulsed operation at pulse lengths in the microsecond regime. To provide the pulsed power for these experiments, a 1-MV, 10-kA modulator with a 1-..mu..s pulse length and a 5-Hz pulse-repetition frequency has been developed and is currently being assembled. The resonant-cavity virtual cathode source has achieved very narrow band output compared to the conventional free-running virtual cathode oscillator. Techniques are being developed for extracting the microwave power from both sources into the rectangular waveguide. The experimental effort is described and current experimental results are discussed.

Fazio, M.V.; Kinross-Wright, J.; Hoeberling, R.F.; VanHaaften, F.

1988-01-01

175

Development of a high power microwave plasma beam applicator  

Microsoft Academic Search

An efficient plasma beam applicator has been developed that utilizes countercurrent cooling techniques to operate at atmospheric pressure and at microwave powers in excess of 5 kW. The device has been operated continuously for tens of hours and shows no signs of degradation. Argon is used as the discharge gas and once initiated, the plasma is self-sustaining. The beam or

S. A. Gower

2001-01-01

176

An ICF (Inertial Confinement Fusion) power plant development program  

SciTech Connect

The development of Inertial Confinement Fusion (ICF) as a power source will require demonstrating four principal objectives: ignition and propagating burn, adequate gain ({eta}G {approx gt} 10) at low drive energy for the reactor driver, reactor pulse rates of a few Hz, and the long-term reliability and economics of a reactor. Additionally, the potential value and applicability of special-purpose ICF reactors, such as tritium breeding reactors and reactors for burning high level fission waste (actinide and fission products) should be investigated. To keep development time and costs to a minimum these should be accomplished with as few major facilities as possible, and subsystems should be developed only as they are needed. A viable scenario for Inertial Fusion Energy (IFE) would include establishing the first milestone in the National Academy of Sciences (NAS) and Fusion Policy Advisory Committee (FPAC) recommended Nova Upgrade, and the latter three in an Engineering Test Facility (ETF)/Demonstration Power Plant (DPP), i.e. two major facilities. To be successful in so short a time, operations at the major facilities would have to be supported by off-line reactor driver and other technology development. The program plan discussed here assumes that enhanced funding is available beginning in FY 1992. It is estimated that such a program could provide a prototype IFE power plant by the second decade of the 21st century and make commercial power available in mid to late 2020s.

Storm, E.; Hogan, W.J.; Lindl, J.D.

1990-06-05

177

Scientific problems in the development of nuclear power  

Microsoft Academic Search

The scientific problems in the development of nuclear power divide conveniently into the physical, chemical and metallurgical problems. The physicist is concerned with prediction of the nuclear performance of reactors. He has to be able to predict the critical size and the amounts of fuel and the degree of enrichment required to enable it to operate at the designed heat

John Cockcroft

1956-01-01

178

Development of Radioisotope Energy Conversion Systems - efficient Radioisotopic Power  

Microsoft Academic Search

Topical area of the conference: (10) Space Power and Propulsion . Abstract: The topic of this paper is the development of the Radioisotope Energy Conversion System (RECS) in a project which is utilizing analytical computational assisted Design and experimental Research in the investigation of fluorescers and effective transducers for the conversion of energy.

Eric V. Steinfelds; Tushar K. Ghosh; Mark A. Prelas; Robert V. Tompson; Sudarshan K. Loyalka

179

Development of long life lithium ion battery for power storage  

Microsoft Academic Search

With the aim of developing lithium ion batteries with a long life and high efficiency for power storage, we experimentally evaluated combinations of cathode and anode active materials, in which batteries are able to obtain over 4000 cycles or 10 years of life. An acceleration method was evaluated using coin cells. We found that changing the current density was effective

Masatoshi Majima; Satoshi Ujiie; Eriko Yagasaki; Keiji Koyama; Shinji Inazawa

2001-01-01

180

Development of an Interactive Power System Research Simulator  

Microsoft Academic Search

An interactive power system research simulator is described which has been developed specifically for interactive computation on time-sharing computer systems with high-speed cathode-ray tube (CRT)\\/printer interfaces. The simulator is developed based on modular structure. The simulator's modules are designed as mathematical operators which permit it to perform computation much like a calculator does. However, it is a specialized calculator that

A. Keyhani

1984-01-01

181

Designs and applications for floating-hydro power systems in small streams  

SciTech Connect

The project focuses on an appropriate technology for small-scale hydro power: floating waterwheels and turbines. For background, relic and existing systems such as early floating mills, traditional Amish waterwheels, and micro-hydro systems are examined. In the design phase of the project, new designs for Floating Hydro Power Systems include: an analysis of floatation materials and systems; a floating undershot waterwheel design; a floating cylinder (fiberglass storage tank) design; a submerged tube design; and a design for a floating platform with submerged propellers. Finally, in the applications phase, stream flow data from East Tennessee streams are used in a discussion of the potential applications of floating hydro power systems in small streams.

Rehder, J.B.

1983-01-01

182

Development of Next Generation Segmented Thermoelectric Radioisotope Power Systems  

NASA Astrophysics Data System (ADS)

Radioisotope thermoelectric generators have been used for space-based applications since 1961 with a total of 22 space missions that have successfully used RTGs for electrical power production. The key advantages of radioisotope thermoelectric generators (RTGs) are their long life, robustness, compact size, and high reliability. Thermoelectric converters are easily scalable, and possess a linear current-voltage curve, making power generation easy to control via a shunt regulator and shunt radiator. They produce no noise, vibration or torque during operation. These properties have made RTGs ideally suitable for autonomous missions in the extreme environments of outer space and on planetary surfaces. More advanced radioisotope power systems (RPS) with higher specific power (W/kg) and/or power output are desirable for future NASA missions, including the Europa Geophysical Orbiter mission. For the past few years, the Jet Propulsion Laboratory (JPL) has been developing more efficient thermoelectric materials and has demonstrated significant increases in the conversion efficiency of high temperature thermocouples, up to 14% when operated across a 975K to 300K temperature differential. In collaboration with NASA Glenn Research Center, universities (USC and UNM), Ceramic and Metal Composites Corporation and industrial partners, JPL is now planning to lead the research and development of advanced thermoelectric technology for integration into the next generations of RPS. Preliminary studies indicate that this technology has the potential for improving the RPS specific power by more than 50% over the current state-of-the-art multi-mission RTG being built for the Mars Science Laboratory mission. A second generation advanced RPS is projected at more than doubling the specific power.

Fleurial, J.; Caillat, T.; Ewell, R. C.

2005-12-01

183

Development of a robust space power system decision model  

NASA Astrophysics Data System (ADS)

NASA continues to evaluate power systems to support human exploration of the Moon and Mars. The system(s) would address all power needs of surface bases and on-board power for space transfer vehicles. Prior studies have examined both solar and nuclear-based alternatives with respect to individual issues such as sizing or cost. What has not been addressed is a comprehensive look at the risks and benefits of the options that could serve as the analytical framework to support a system choice that best serves the needs of the exploration program. This paper describes the SAIC developed Space Power System Decision Model, which uses a formal Two-step Analytical Hierarchy Process (TAHP) methodology that is used in the decision-making process to clearly distinguish candidate power systems in terms of benefits, safety, and risk. TAHP is a decision making process based on the Analytical Hierarchy Process, which employs a hierarchic approach of structuring decision factors by weights, and relatively ranks system design options on a consistent basis. This decision process also includes a level of data gathering and organization that produces a consistent, well-documented assessment, from which the capability of each power system option to meet top-level goals can be prioritized. The model defined on this effort focuses on the comparative assessment candidate power system options for Mars surface application(s). This paper describes the principles of this approach, the assessment criteria and weighting procedures, and the tools to capture and assess the expert knowledge associated with space power system evaluation. .

Chew, Gilbert; Pelaccio, Dennis G.; Jacobs, Mark; Stancati, Michael; Cataldo, Robert

2001-02-01

184

High energy cable development for pulsed power applications  

SciTech Connect

Commercially available coaxial cables have been used successfully to deliver current from a power supply to small electromagnetic launchers. As launchers become more energetic, and as repetitive fire becomes more important, the shear number of parallel cables required, becomes impractical. This paper presents a new cable design, outlines the development of terminal connectors for the cable, and describes the characterization tests of a first run sample of high power cable. This work was performed for the Air Force Armament Laboratory, Electromagnetic Launcher Technology Branch (AFATL/SAH) and was funded by SDIO. All experimental work was performed in AFATL's Site A-15 Basic Research Facility.

Jamison, K.A.; Stearns, R.E. (Science Applications International Corp., Shalimar, FL (US)); Klug, R.B. (Air Force Armament Lab., Eglin AFB, FL (United States)); Ford, R.D. (Naval Research Lab., Washington, DC (United States))

1991-01-01

185

Modelling Sustainable Development Scenarios of Croatian Power System  

NASA Astrophysics Data System (ADS)

The main objective of power system sustainable development is to provide the security of electricity supply required to underpin economic growth and increase the quality of living while minimizing adverse environmental impacts. New challenges such as deregulation, liberalization of energy markets, increased competition on energy markets, growing demands on security of supply, price insecurities and demand to cut CO2 emissions, are calling for better understanding of electrical systems modelling. Existing models are not sufficient anymore and planners will need to think differently in order to face these challenges. Such a model, on the basis on performed simulations, should enable planner to distinguish between different options and to analyze sustainability of these options. PLEXOS is an electricity market simulation model, used for modeling electrical system in Croatia since 2005. Within this paper, generation expansion scenarios until 2020 developed for Croatian Energy Strategy and modeled in PLEXOS. Development of sustainable Croatian energy scenario was analyzed in the paper - impacts of CO2 emission price and wind generation. Energy Strategy sets goal for 1200 MW from wind power plants in 2020. In order to fully understand its impacts, intermittent nature of electricity generation from wind power plant was modeled. We conclude that electrical system modelling using everyday growing models has proved to be inevitable for sustainable electrical system planning in complex environment in which power plants operate today.

Paši?ko, Robert; Stani?, Zoran; Debrecin, Nenad

2010-05-01

186

Solar dynamic power system development for Space Station Freedom  

NASA Astrophysics Data System (ADS)

The development of a solar dynamic electric power generation system as part of the Space Station Freedom Program is documented. The solar dynamic power system includes a solar concentrator, which collects sunlight; a receiver, which accepts and stores the concentrated solar energy and transfers this energy to a gas; a Brayton turbine, alternator, and compressor unit, which generates electric power; and a radiator, which rejects waste heat. Solar dynamic systems have greater efficiency and lower maintenance costs than photovoltaic systems and are being considered for future growth of Space Station Freedom. Solar dynamic development managed by the NASA Lewis Research Center from 1986 to Feb. 1991 is covered. It summarizes technology and hardware development, describes 'lessons learned', and, through an extensive bibliography, serves as a source list of documents that provide details of the design and analytic results achieved. It was prepared by the staff of the Solar Dynamic Power System Branch at the NASA Lewis Research Center in Cleveland, Ohio. The report includes results from the prime contractor as well as from in-house efforts, university grants, and other contracts. Also included are the writers' opinions on the best way to proceed technically and programmatically with solar dynamic efforts in the future, on the basis of their experiences in this program.

1993-07-01

187

Development of a high power three-loop nuclear power plant  

Microsoft Academic Search

A conceptual design for a new three-loop nuclear power reactor at 1700MWe, P3-1700, is developed. P3 stands for a new design philosophy, which requires protection, performance, and pro-activeness in the design. The design is developed from the proven technology of APR1400, while a significant improvement in the safety and performance is pursued by adopting a new fuel assembly design, a

J. H. Song; J. H. Baik; S. K. Zee; S. Y. Park; S. Choi; B. D. Chung; W. P. Baek

2010-01-01

188

Development of the small community solar power system  

NASA Astrophysics Data System (ADS)

The status of the Small Community Solar Thermal Power Experiment is presented. Activities on the Phase 2 single/module development effort are presented, together with plans for the Phase 3 1 MWe demonstration plant. A description of the various subsystems and components is given with emphasis on the unmanned microprocessor based plant control subsystem. Latest performance figures are given for the 1 MWe plant, based on 56 power modules, each consisting of a 12m low cost concentrator, a cavity receiver, a Rankine power conversion subsystem and a ground mounted solid-state rectifier. Overall plant efficiency at rated conditions is 15.8 percent. Advanced glass concentrator designs yield 20 percent overall efficiencies.

Babbe, R. H.

1981-05-01

189

Long Duration Balloon Maximum Power Point Tracking (MPPT) solar power system development  

NASA Astrophysics Data System (ADS)

High altitude scientific balloons have been used for many years to provide scientists with access to near space at a fraction of the cost of satellite based or sounding rocket experiments. In recent years, these balloons have been successfully used for long duration missions of up to 40 days. Longer missions, with durations of up to 100 days (Ultra Long), are in the planning stages. Due to the flight durations, solar power systems have been utilized throughout the Long Duration Balloon (LDB) flight program to power the necessary electronic systems. Recently, Maximum Power Point Tracking (MPPT) charge controllers have become available off-the-shelf. These controllers along with high efficiency mono-crystalline solar cells have become reliable, low cost solutions even in the harsh environments they operate in. The LDB program at the Columbia Scientific Balloon Facility (CSBF) began supporting solar power systems with custom units fabricated by the Physical Science Laboratory (PSL) of New Mexico State University (NMSU). These charge controllers proved to be very reliable systems; however, they required intensive labor to build and were relatively expensive. As off-the-shelf MPPT charge controllers have become available, they have been integrated into the LDB flight support systems. Coupled with PSL developed interface electronics for monitoring and power switching, they have proven to be as reliable, less expensive, and more efficient. The addition of MPPT allows for the controller to operate the solar panel at it highest power production point. Newer, off-the-shelf controllers with smarter MPPT, are currently being tested. This paper describes the long and ultra-long balloon missions and the role that solar power plays in mission success. More importantly, it discusses the recent developments in off-the-shelf MPPT charge controllers configured for use in the harsh high altitude balloon environment.

Perez, Juan

190

Development in Russia of Megawatt Power Gyrotrons for Fusion  

NASA Astrophysics Data System (ADS)

Tests of the Russian ITER gyrotrons were continued after debugging of the test facility at Kurchatov Institute including the evacuated transmission line and power supplies capable to provide gyrotron CW operation. A new ITER gyrotron (V-10) with upgraded body insulation, liquid cooling system for the DC-break ceramic and improved design of the relief window has been manufactured and is currently under test. A maximal total efficiency near 55% at 1 MW power level was attained. The maximal pulse duration of 1000 s at 0.8 MW power was limited at that time by the test stand. At 1 MW power level the gyrotron V-10 up to now reached a pulse duration of 570 s. An advanced short-pulse (100 ms) gyrotron model operating in the TE28.12 mode demonstrated a very robust operation at relatively high electron energies (up to 100 keV) necessary to achieve 1.5-2 MW output power. Three double frequency gyrotrons have been delivered to ASDEX Upgrade. The development of a multi-frequency gyrotron with a broadband or tuneable synthetic diamond window is in progress.

Litvak, Alexander G.; Denisov, Gregory G.; Myasnikov, Vadim E.; Tai, Evgeny M.; Azizov, Englen A.; Ilin, Vladimir I.

2011-03-01

191

Technology development for a Stirling radioisotope power system  

NASA Astrophysics Data System (ADS)

NASA Glenn Research Center and the Department of Energy are developing a Stirling convertor for an advanced radioisotope power system to provide spacecraft on-board electric power for NASA deep space missions. NASA Glenn is addressing key technology issues through the use of two NASA Phase II SBIRs with Stirling Technology Company (STC) of Kennewick, WA. Under the first SBIR, STC demonstrated a synchronous connection of two thermodynamically independent free-piston Stirling convertors and a 40 to 50 fold reduction in vibrations compared to an unbalanced convertor. The second SBIR is for the development of an Adaptive Vibration Reduction System (AVRS) that will essentially eliminate vibrations over the mission lifetime, even in the unlikely event of a failed convertor. This paper presents the status and results for these two SBIR projects and also discusses a new NASA Glenn in-house project to provide supporting technology for the overall Stirling radioisotope power system development. Tasks for this new effort include convertor performance verification, controls development, heater head structural life assessment, magnet characterization and thermal aging tests, FEA analysis for a lightweight alternator concept, and demonstration of convertor operation under launch and orbit transfer load conditions. .

Thieme, Lanny G.; Qiu, Songgang; White, Maurice A.

2000-01-01

192

The solar power satellite - A programme for development aid  

NASA Astrophysics Data System (ADS)

It is pointed out that there are essentially four types of foreign aid. These types include the transfer of knowledge, the transfer of materials, the transfer of funds, and the provision of preferential agreements. A great number of studies have been conducted to assess the pros and cons of a Solar Power Satellite System (SPSS). According to many, the most difficult problems which have to be solved in connection with such a project are related to environmental, societal, political, and institutional aspects. The present investigation is concerned with the initiation of a gradual, phased approach toward a Solar Power Satellite (SPS). Phase I of such an approach would involve the set-up of an organization and the allocation of studies. The building of photovoltaic farms and of an SPS pilot project would occur during the second phase, while development and deployment of a full SPSS would take place during the third phase. The developments are to be financed under foreign aid.

Meiner, R. C.

193

Development of High Power Long Pulse Iter Gyrotrons  

NASA Astrophysics Data System (ADS)

Recent progress on the development of a high power 170 GHz gyrotron obtained in Japan Atomic Energy Agency (JAEA) is presented. Firstly, a repetitive operation of 800 kW/600 s with an interval of 20-30 min was performed. The electrical efficiency was 52-57 % with a depressed collector. The 72 shots of 88 shots was very stable 600 s oscillation. No damage was found on the gyrotron after the test. Secondly, 5 kHz-full power modulation was demonstrated with pulse duration of 60 s. For this purpose, a full beam current modulation was realized to minimize the collector heat load by adopting an anode voltage switching. Thirdly, in the dual frequency gyrotron development, the 1.3 MW oscillations at 170 GHz and 136.8 GHz were successfully demonstrated at short pulse operation by changing the cavity field and the anode voltage keeping other parameters constant.

Sakamoto, K.; Kajiwara, K.; Oda, Y.; Takahashi, K.; Hayashi, K.; Kobayashi, N.; Henderson, M. A.; Darbos, C.

2011-02-01

194

Inertial fusion power development: the path to global warming suppression  

NASA Astrophysics Data System (ADS)

Shortly after the demonstration of the first lasers, it was proposed that nuclear fusion induced by laser energized implosion could be utilized for energy generation. Today, there are many facilities worldwide undertaking IFE research, and after decades of experiments, theoretical developments and simulations, it is expected that the laser fusion ignition will be demonstrated in the next few years. If this does indeed happen, we will see a new era toward the realization of a fusion power plant.

Mima, Kunioki

2010-01-01

195

The development and prospect of offshore wind power technology in the world  

Microsoft Academic Search

With exploitation of the wind power technology, the offshore wind power has a rapid development and it is becoming a concerns focus of the world's renewable energy problems. The construction of offshore wind power has entered the large-scale development stage in the world. An overview of the development of wind power is introduced from several aspects of development status and

Licun Wang; Jing Wei; Xudong Wang; Xianming Zhang

2009-01-01

196

Development path of low aspect ratio tokamak power plants  

SciTech Connect

Recent advances in tokamak physics indicate the spherical tokamak may offer a magnetic fusion development path that can be started with a small size pilot plant and progress smoothly to larger power plants. Full calculations of stability to kink and ballooning modes show the possibility of greater than 50% beta toroidal with the normalized beta as high as 10 and fully aligned 100% bootstrap current. Such beta values coupled with 2--3 T toroidal fields imply a pilot plant about the size of the present DIII-D tokamak could produce {approximately} 800 MW thermal, 160 MW net electric, and would have a ratio of gross electric power over recirculating power (Q{sub PLANT}) of 1.9. The high beta values in the ST mean that E x B shear stabilization of turbulence should be 10 times more effective in the ST than in present tokamaks, implying that the required high quality of confinement needed to support such high beta values will be obtained. The anticipated beta values are so high that the allowable neutron flux at the blanket sets the device size, not the physics constraints. The ST has a favorable size scaling so that at 2--3 times the pilot plant size the Q{sub PLANT} rises to 4--5, an economic range and 4 GW thermal power plants result. Current drive power requirements for 10% of the plasma current are consistent with the plant efficiencies quoted. The unshielded copper centerpost should have an adequate lifetime against nuclear transmutation induced resistance change and the low voltage, high current power supplies needed for the 12 turn TF coil appear reasonable. The favorable size scaling of the ST and the high beta mean that in large sizes, if the copper TF coil is replaced with a superconducting TF coil and a shield, the advanced fuel D-He{sup 3} could be burned in a device with Q{sub PLANT} {approximately} 4.

Stambaugh, R.D.; Chan, V.S.; Miller, R.L. [and others

1997-03-01

197

Development of low-power wireless networked radioactive material sensor  

NASA Astrophysics Data System (ADS)

Our team at the United States army research laboratory (ARL) has implemented the design and development of a low-power, compact, wireless-networked radiation sensor array. The sensor system was developed to provide high sensitivity event detection and remote warning for a broad range of radioactive materials. The sensor can identify the presence of 1?Ci Cs137 at a distance of 1.5m. The networked array operates well as a facility sensor however the architecture is designed to be operated outside the laboratory environment as well. The performance of the facility radiation measurement system is described and benchmarked to readily available check sources such as Cs137.

Katsis, Dimosthenis; Burns, David; Henriquez, Stanley; Litz, Marc

2010-04-01

198

Approach to develop space solar power as a new energy system for developing countries  

SciTech Connect

The idea of space solar power proposed by Glaser was explained as a set of a solar power station in geostationary earth orbit to transmit microwave power and a ground station to receive the microwave power. Most of the ideas and concepts since Glaser used the same context. On the other hand, Collins et al. introduced the concept of microwave `fuel` to assess the commercial relations of power from space, in which space solar power stations are considered to sell microwave power to any unspecified rectenna. This concept changed the theoretical context of `power from space` to an industrial and economic relation of producers and buyers of an industrial product. This new context has been applied to the SPS 2000 conceptual study. As a result, if 2.45 GHz microwave power transmission is used, each rectenna can be planned and engineered independently from the space sector by local users, especially in developing countries, who are familiar with such activities as introducing solar energy systems. 7 refs., 3 figs.

Nagatomo, Makoto [Inst. of Space and Astronautical Science, Sagamihara (Japan)

1996-12-31

199

Development of Power Assisting Suit for Assisting Nurse Labor  

NASA Astrophysics Data System (ADS)

In order to realize a power assisting suit for assisting a nurse caring a patient in her arm, a hardness sensor of muscle using load cell and a pneumatic rotary actuator utilizing pressure cuffs have been developed. The power assisting suit consists of shoulders, arms, waist and legs made of aluminum, and is fitted on the nurse body. The power assisting suit is originated with the concept of a master and slave system in one body. The arms, waist and legs have the pneumatic rotary actuators. The pneumatic rotary actuators are constructed with pressure cuffs sandwiched between thin plates. The action of the arms, waist and legs of the nurse are sensed with the muscle hardness sensor utilizing load cell with diaphragm mounted on a sensing tip. The dent of the sensing tip corresponds to the hardness of the muscle so that exerting muscle force produces electric signal. This paper gives the design and characteristics of the power assisting suit using the cuff type pneumatic rotary actuators and the muscle hardness sensor verifying its practicability.

Yamamoto, Keijiro; Hyodo, Kazuhito; Ishii, Mineo; Matsuo, Takashi

200

DEVELOPMENT OF INFORMATION EMBEDDED POWER SYSTEM USING OPNET  

Microsoft Academic Search

Due to the significant changes, information embedded power system is required to efficiently transmit power system data so as to control and monitor entire power sysetm effectively. Power system protocol plays significant role in realiably transmitting critical data from different power intelligent electronic devices (IEDs) to the main control centre. An experimental analysis was performed to analyse different power system

M. T. O. Amanullah; A. Kalam; A. Zayegh

201

The Evolution of Political Power in Political Development  

Microsoft Academic Search

To understand political science, we must understand political power. Our misunder-standing of political power is especially problematic for those concerned with comparative politics.Political Elasticity (PE) theory, including the concepts of ‘quality of power’ and ‘political software’, is used to examine and clarify such dichotomies as: (i) transitive and intransitive power; (ii) hard and soft forms of power; and (iii) power

Herbert H. Werlin

2008-01-01

202

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

203

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

204

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

205

Power Systems Development Facility Gasification Test Campaing TC18  

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 TC18 of the PSDF gasification process. Test campaign TC18 began on June 23, 2005, and ended on August 22, 2005, with the gasifier train accumulating 1,342 hours of operation using Powder River Basin (PRB) subbituminous coal. Some of the testing conducted included commissioning of a new recycle syngas compressor for gasifier aeration, evaluation of PCD filter elements and failsafes, testing of gas cleanup technologies, and further evaluation of solids handling equipment. At the conclusion of TC18, the PSDF gasification process had been operated for more than 7,750 hours.

Southern Company Services

2005-08-31

206

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

207

Technology status and project development risks of advanced coal power generation technologies in APEC developing economies  

SciTech Connect

The report reviews the current status of IGCC and supercritical/ultrasupercritical pulverized-coal power plants and summarizes risks associated with project development, construction and operation. The report includes an economic analysis using three case studies of Chinese projects; a supercritical PC, an ultrasupercritical PC, and an IGCC plant. The analysis discusses barriers to clean coal technologies and ways to encourage their adoption for new power plants. 25 figs., 25 tabs.

Lusica, N.; Xie, T.; Lu, T.

2008-10-15

208

Worldwide geothermal power development: an overview and update  

SciTech Connect

During the past year, geothermal electric generating capacity has increased by 616.4 MW or 24%. The bulk of this growth has come from new units in the US (344.9 MW) and the Philippines (147.5 MW). Progress is continuing in Japan, Mexico, Indonesia, Italy, and Kenya. In spite of generally poor worldwide economic conditions and political unrest in several regions, geothermal developments are nevertheless taking place albeit at a slower pace than was anticipated a decade ago. In this paper the authors present the state of affairs in geothermal power and offer a glimpse at some of the trends that may be emerging for the future.

DiPippo, R.

1984-01-01

209

Power Systems Development Facility. First quarterly report, 1997  

SciTech Connect

The objective of this project, herein referred to as the Power Systems Development Facility (PSDF), is to evaluate hot gas particle control technologies using coal derived gas streams. This project entails the design, construction, installation, and use of a flexible test facility which can operate under realistic gasification and combustion conditions. The major particulate control device (PCD) issues to be addressed include the integration of the PCDs into coal utilization systems, on-line cleaning techniques, chemical and thermal degradation of components, fatigue or structural failures, blinding, collection efficiency as a function of particle size, and scale-up of particulate control systems to commercial size.

NONE

1997-07-01

210

Development and Commercialization of the Lunar Solar Power System  

NASA Astrophysics Data System (ADS)

The proposed Lunar Solar Power (LSP) System consists of pairs of power bases located on opposite limbs of the Moon as seen from Earth. The power bases collect the solar energy and convert it to beams of microwaves. The microwaves are delivered directly to moonward-facing receivers on Earth or indirectly through relay satellites in orbit about Earth (1, 2, 3, 4). The LSP System may be the only reasonable method for establishing sustainable global energy prosperity within two generations. Commercial power prosperity requires at least 2 kWe/person. For ten billion people this implies 20 TWe and 2,000 TWe-y of electric energy or ~6,000 TWt-y of thermal energy per century (5, 6, 7, 8). A brief overview is presented of a reference LSP System that supplies 20 TWe by 2050. The engineering scales and the cost and benefits of this system are described. In order to provide low cost commercial electric energy, the power bases are made primarily of local lunar materials by machines, facilities, and people deployed from Earth (1, 2, 3). In addition, lunar production machinery can be made primarily from lunar materials. Advantages of this approach, versus the reference LSP System, are discussed. Full-scale production of a LSP System will certainly be proceeded by terrestrial and lunar operation of the production machinery and a small-scale demonstration of the operational system (1). Using government funds to establishing a permanent lunar base and the associated transportation system would significantly reduce the upfront cost for the demonstration of a commercial LSP System (2). The government program would provide a legal framework for commercial development of the LSP System (3, 9). The LSP System offers the opportunity to establish a materials industry on the Moon that can produce a growing mass and variety of goods and enable new services of benefit on the Earth and the Moon (10). New priorities are suggested for civilian space programs that can accelerate the establishment of a demonstration LSP System and growing commercialization of the Moon and cis-lunar space. 1. Criswell, David R. (2001) Lunar Solar Power System: Industrial Research, Development, and Demonstration, Session 1.2.2: Hydroelectricity, Nuclear Energy and New Renewables, 18th World Energy Congress. [http://www.wec.co.ukin the Congress Papers, Discussion Sessions] 2. Criswell, D. R. and Waldron, R. D. 1993. International Lunar Base and Lunar-based Power System to Supply Earth with Electric Power, Acta Astronautica, Vol. 29, No. 6, pp. 469-480. Pergamon Press Ltd. 3. NASA TASK FORCE. 1989 (July) Report of NASA Lunar Energy Enterprise Case Study Task Force. NASA Technical Memo 101652. 163pp. NASA Headquarters, Office of Exploration (Code Z), Washington, D.C. 20546. 4. Moore, T. (2000, Spring) "Renewed interest in space solar power," EPRI Journal, pp. 6-17. 5. World Energy Council (2000) Energy for Tomorrow's World - Acting Now!, 175pp., Atalink Projects Ltd, London. 6. Criswell, David R. (2002) Energy Prosperity within the 21st Century and Beyond: Options and the Unique Roles of the Sun and the Moon. Chapter 9: Innovative Solutions To CO2 Stabilization, R. Watts (editor), Cambridge Un. Press 7. Strong, Maurice (2001) Where on Earth are We Going?, (See p. 351-352), 419pp., Random House (forward by Kofi Annan) 8. Criswell, D. R. and Thompson, R. G. (1996), "Data envelopment analysis of space and terrestrial-based large scale commercial power systems for Earth: A prototype analysis of their relative economic advantages," Solar Energy, 56, No. 1: 119-131. 9 ILEWG (1997), Proc. 2nd International Lunar Workshop, organized by: International Lunar Exploration Working Group, Inst. Space and Astronautical Science, and National Space Development Agency of Japan, Kyoto, Japan, (October 14 - 17), 89pp. 10. Criswell, D.R. 2000 (October) Commercial power for Earth and lunar industrial development, 7pp., 51st Congress of the International Astronautical Federation (IAF). (Rio de Janeiro, Brazil). Paper #IAA-00-IAA.13.2.06.

Criswell, D. R.

2002-01-01

211

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

212

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

213

Economic viability of photovoltaic power for development assistance applications  

SciTech Connect

This paper briefly discusses the development assistance market and examines a number of specific PV development assistance field tests including water pumping/grain grinding (Tangaye, Upper Volta), vaccine refrigerators slated for deployment in 24 countries, rural medical centers to be installed in Ecuador, Guyana, Kenya and Zimbabwe, and remote earth stations to be deployed in the near future. A comparison of levelized energy cost for diesel generators and PV systems covering a range of annual energy consumptions is also included. The analysis does not consider potential societal, environmental or political benefits associated with PV power. PV systems are shown to be competitive with diesel generators based on life cycle cost considerations, assuming a system price of $20/W(peak), for applications having an annual energy demand of up to 6000 kilowatt-hours per year.

Bifano, W.J.

1982-09-01

214

Private power development and environmental protection in India  

SciTech Connect

This report assesses relationships between private power development in India and environmental protection in that country. The central question is whether private firms generating and distributing electricity in developing countries will do a better or a worse job in environmental protection, as a part of their overall corporate responsibility, than public-sector institutions. After reviewing the fundamental question, why it is asked, and the context in which it operates in the nation of India, this report continues with an analysis of available information, quantitative and qualitative, that can help to resolve the issues in the particular case of India. Finally, it ends with conclusions from the analysis and recommendations for reducing remaining uncertainties in the future.

Das, S.; Wilbanks, T.J.

1997-12-01

215

VGA 17 ?m development for compact, low-power systems  

NASA Astrophysics Data System (ADS)

The high level of accumulated expertise by ULIS and CEA/LETI on uncooled microbolometers made from amorphous silicon has enabled ULIS to develop VGA IRFPA formats with 17 ?m pixel-pitch, hence building up the currently available product catalog. This detector keeps all the innovations developed on the 25 ?m pixel-pitch ROIC (detector configuration by serial link, low power consumption and wide electrical dynamic range). The specific appeal of this unit lies in the high spatial resolution it provides. The pixel-pitch reduction turns this TEC-less VGA array into a product well adapted for high resolution and compact systems. Electro-optical performances of this IRFPA are presented hereafter as well as recent performance improvement. We will focus on NETD trade-off with wide thermal dynamic range, as well as the high characteristics uniformity and pixel operability, achieved thanks to the mastering of amorphous silicon technology coupled with the ROIC design. Solar exposure is also taken into account and shows that ULIS amorphous silicon is perfectly well suited to sustain high intensity exposure. This technology node associated with advanced packaging technique paves the way to compact low power system.

Durand, A.; Tissot, J. L.; Robert, P.; Cortial, S.; Roman, C.; Vilain, M.; Legras, O.

2011-05-01

216

ENGINEERING DEVELOPMENT OF COAL-FIRED HIGH PERFORMANCE POWER SYSTEMS  

SciTech Connect

A High Performance Power System (HIPPS) is being developed. This system is a coal-fired, combined cycle plant with indirect heating of gas turbine air. Foster Wheeler Development Corporation and a team consisting of Foster Wheeler Energy Corporation, Bechtel Corporation, University of Tennessee Space Institute and Westinghouse Electric Corporation are developing this system. In Phase 1 of the project, a conceptual design of a commercial plant was developed. Technical and economic analyses indicated that the plant would meet the goals of the project which include a 47 percent efficiency (HHV) and a 10 percent lower cost of electricity than an equivalent size PC plant. The concept uses a pyrolyzation process to convert coal into fuel gas and char. The char is fired in a High Temperature Advanced Furnace (HITAF). The HITAF is a pulverized fuel-fired boiler/air heater where steam is generated and gas turbine air is indirectly heated. The fuel gas generated in the pyrolyzer is then used to heat the gas turbine air further before it enters the gas turbine. The project is currently in Phase 2, which includes engineering analysis, laboratory testing and pilot plant testing. Research and development is being done on the HIPPS systems that are not commercial or being developed on other projects. Pilot plant testing of the pyrolyzer subsystem and the char combustion subsystem are being done separately, and after each experimental program has been completed, a larger scale pyrolyzer will be tested at the Power Systems Development Facility (PSDF) in Wilsonville, Al. The facility is equipped with a gas turbine and a topping combustor, and as such, will provide an opportunity to evaluate integrated pyrolyzer and turbine operation. During this quarter, initial char combustion tests were performed at the CETF using a Foster Wheeler commercial burner. These preliminary tests were encouraging and will be used to support the development of an innovative char burner for the HIPPS program. The CETF design effort continued through this quarter with the completion of the following systems: 1. Char Storage and Transport System 2. Reheat Burner The char storage system is required for the HIPPS program because the ball mill needs to be de-coupled from the burner. This de-coupling of the mill and the burner allows greater flexibility in changing char particle size distribution ? one of the main test variables under the HIPPS program. The reheat burner is employed to prevent condensation of the flue gas in the baghouse.

NONE

1998-10-01

217

ENGINEERING DEVELOPMENT OF COAL-FIRED HIGH PERFORMANCE POWER SYSTEMS  

SciTech Connect

A High Performance Power System (HIPPS) is being developed. This system is a coal-fired, combined cycle plant with indirect heating of gas turbine air. Foster Wheeler Development Corporation and a team consisting of Foster Wheeler Energy Corporation, Bechtel Corporation, University of Tennessee Space Institute and Westinghouse Electric Corporation are developing this system. In Phase 1 of the project, a conceptual design of a commercial plant was developed. Technical and economic analyses indicated that the plant would meet the goals of the project which include a 47 percent efficiency (HHV) and a 10 percent lower cost of electricity than an equivalent size PC plant. The concept uses a pyrolyzation process to convert coal into fuel gas and char. The char is fired in a High Temperature Advanced Furnace (HITAF). The HITAF is a pulverized fuel-fired boiler/air heater where steam is generated and gas turbine air is indirectly heated. The fuel gas generated in the pyrolyzer is then used to heat the gas turbine air further before it enters the gas turbine. The project is currently in Phase 2 which includes engineering analysis, laboratory testing and pilot plant testing. Research and development is being done on the HIPPS systems that are not commercial or being developed on other projects. Pilot plant testing of the pyrolyzer subsystem and the char combustion subsystem are being done separately, and after each experimental program has been completed, a larger scale pyrolyzer will be tested at the Power Systems Development Facility (PSDF) in Wilsonville, Al. The facility is equipped with a gas turbine and a topping combustor, and as such, will provide an opportunity to evaluate integrated pyrolyzer and turbine operation. This report addresses the areas of technical progress for this quarter. Preliminary process design was started with respect to the integrated test program at the PSDF. All of the construction tasks at Foster Wheeler's Combustion and Environmental Test Facility (CETF) have been completed in preparation for the char combustion test program, this includes installation of the char burner, and the on-line mass spectrometer. A test matrix has been defined, utilizing a statistical design of experiment (SDOE) methodology, for the char combustion program. The first phase of the CETF shakedown has been completed, and all analog devices (thermocouples, transmitters, etc.) have been calibrated.

NONE

1998-10-01

218

Predictive analysis and basic judgment of development targets in China's wind power industry  

Microsoft Academic Search

This paper presents the basic principles and the starting point which can help us to set goals for wind power industry development. After analyzing the existing development goals of national wind power industry, this paper finds that the national planned target for wind power is too low, and the actual installed capacity of wind power has doubled compared to the

Chuanglin Fang; Deli Wang

2009-01-01

219

Prospectives for China's solar thermal power technology development  

Microsoft Academic Search

China's total installed electrical power capacity reached 700GW by the end of 2007 and is predicted to surpass 900GW in 2010. The rapid increase in energy demand and increasing global warming have both pushed China to change its current electrical power structure where coal power accounts for nearly 75% of the total electric power generation. China has already become the

Zhifeng Wang

2010-01-01

220

Preliminary working paper: satellite power system and lesser developed countries  

SciTech Connect

The objective of this report is to screen selected countries that, by geographical location, might be appropriate sites for the rectenna system and for which technical, environmental, social, demographic, political, and economic factors make a Satellite Power System (SPS) project appear possible. The study focused on countries that are referred to as Lesser Developed Countries (LDCs). Of 130 countries, sovereignties, and dependencies classified by the United Nations as less developed, thirteen countries were selected for study. The countries in the Americas are Mexico, Colombia, Venezuela, and Brazil. On the African continent, the countries are Algeria, Senegal, Gambia, Zaire, and Kenya. The countries in Asia and Oceania are The People's Republic of China, India, Thailand, and Indonesia. Certain general conclusions can be drawn from this study. Countries that might be able to support or contribute to SPS are the established, major energy exporters. The consumption of countries that export some energy virtually matches production. They may be able to pay for SPS in the years 2000 or 2025, but increased economic development and diversification of exports will need to be implemented first. Finally, those countries that import energy do not have an economic base by which they could support SPS unaided, but require energy. All thirteen nations could benefit from SPS. SPS could prove invaluable to these countries with sensitive economies. The added electrical energy could bolster their economies and provide for increased development so that the nations could suppport or contribute to SPS.

Oliver, T.E.; Ventry, L.T.; DuBois, C.; Dhanda, R.

1980-02-03

221

Development of high-power gyrotrons with gradually tapered cavity  

NASA Astrophysics Data System (ADS)

In high power gyrotrons, the parasitic modes coupled with the operating mode cannot be avoided in the beam-wave interaction. These parasitic modes will decrease the efficiency of the gyrotrons. The purity of the operating mode affected by different tapers should be carefully studied. The steady-state self-consistent nonlinear theory for gyrotron with gradually tapered cavity is developed in this paper. A steady-state calculation code including ``cold cavity'' and ``hot cavity'' is designed. By comparison, a time-domain model analysis of gyrotron operation is also studied by particle-in-cell (PIC). It is found that the tapers of gyrotron have different influences on the modes coupling between the operating mode and the parasitic modes. During the study, an example of 94 GHz gyrotron with pure operating mode TE03 has been designed. The purity of the operating mode in the optimized cavity is up to -77 dB, and in output waveguide of the cavity is up to -76 dB. At the same time, the beam-wave interaction in the designed cavity has been simulated, too. An output power of 120 kW, corresponding to 41.6% efficiency and an oscillation frequency of 94.099 GHz have been achieved with a 50 kV, 6 A helical electron beam at a guiding magnetic field of 3.5485 T. The results show that the power in spurious modes of the optimized cavity may be kept far below than that of the traditional tapered cavity.

Chaojun, Lei; Sheng, Yu; Xinjian, Niu; Yinghui, Liu; Hongfu, Li; Xiang, Li

2012-12-01

222

Engineering Development of Coal-Fired High Performance Power Systems  

SciTech Connect

This report presents work carried out under contract DE-AC22-95PC95144 ''Engineering Development of Coal-Fired High Performance Systems Phase II and III.'' The goals of the program are to develop a coal-fired high performance power generation system (HIPPS) that is capable of: thermal efficiency (HHV) {ge} 47% NOx, SOx, and particulates {le} 10% NSPS (New Source Performance Standard) coal providing {ge} 65% of heat input all solid wastes benign cost of electricity {le}{le} 90% of present plants Phase I, which began in 1992, focused on the analysis of various configurations of indirectly fired cycles and on technical assessments of alternative plant subsystems and components, including performance requirements, developmental status, design options, complexity and reliability, and capital and operating costs. Phase I also included preliminary R&D and the preparation of designs for HIPPS commercial plants approximately 300 MWe in size. Phase II, had as its initial objective the development of a complete design base for the construction and operation of a HIPPS prototype plant to be constructed in Phase III. As part of a descoping initiative, the Phase III program has been eliminated and work related to the commercial plant design has been ended. The rescoped program retained a program of engineering research and development focusing on high temperature heat exchangers, e.g. HITAF development (Task 2); a rescoped Task 6 that is pertinent to Vision 21 objectives and focuses on advanced cycle analysis and optimization, integration of gas turbines into complex cycles, and repowering designs; and preparation of the Phase II Technical Report (Task 8). This rescoped program deleted all subsystem testing (Tasks 3, 4, and 5) and the development of a site-specific engineering design and test plan for the HIPPS prototype plant (Task 7). Work reported herein is from: Task 2.2 HITAF Air Heaters

None

2000-12-31

223

Electric Power Development in the Pacific Northwest Region: Institutional Commitments and Alternatives, Phase I.  

National Technical Information Service (NTIS)

Pacific Northwest regional electric power development was studied with three objectives: (1) to assemble an historical account of institutional arrangements for electric power development in the region; (2) to identify emergent public policy issues; (3) t...

K. N. Lee M. E. Marts R. G. Walton A. D. Birmingham

1976-01-01

224

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

225

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

226

Experimental development of power consumption in LIPCA-C2  

NASA Astrophysics Data System (ADS)

Currently a carbon/glass fiber, piezoelectric-ceramic composite, LIPCA, is being investigated for use in micro aerial vehicles, micropumps, vibration control systems, and a number of bio-inspired robotic devices. Many of these applications help demonstrate the growing trend in miniaturization that drives innovative developments in products ranging from pacemakers to cell phones. When designing products for our ever shrinking world not only must the size of the principal components of the system be taken into consideration but also the components of the system that afford functionality as a bi-product of their inclusion. To this end we are referring to the mechanical or electrical systems that provide these devices with the necessary energy to perform their tasks. In order to make efficient use of LIPCA in the previously mentioned applications, the ability to forecast power consumption is essential. In the present investigation, a method of modeling the power consumption of piezoelectric devices is presented and evaluated over a range of frequencies and voltages. Effects of variation in actuator dimension, driving voltage, and frequency are presented. Accuracy of the model is assessed and factors leading to inaccuracies are identified.

Smith, Byron F.; Goo, Nam Seo; Mossi, Karla

2007-04-01

227

Power Systems Development Facility. Quarterly report, January--March 1996  

SciTech Connect

The objective of this project is to evaluate hot gas particle control technologies using coal-derived gas streams. This will entail the design, construction, installation, and use of a flexible test facility which can operate under realistic gasification and combustion conditions. The major particular control device issues to be addressed include the integration of the particulate control devices into coal utilization systems, on-line cleaning techniques, chemical and thermal degradation of components, fatigue or structural failures, blinding, collection efficiency as a function of particle size, and scale-up of particulate control systems to commercial size. The conceptual design of the facility was extended to include a within scope, phased expansion of the existing Hot Gas Cleanup Test Facility Cooperative Agreement to also address systems integration issues of hot particulate removal in advanced coal-based power generation systems. This expansion to the Hot Gas Cleanup Test Facility is herein referred to as the Power Systems Development Facility (PSDF). The major emphasis during this reporting period was continuing the detailed design of the Foster Wheeler portion of the facility towards completion and integrating the balance-of-plant processes and particulate control devices (PCDs) into the structural and process designs. Substantial progress in construction activities was achieved during the quarter.

NONE

1996-05-01

228

Geometry, contact, surface, and optical developments for photoconductive power switches  

SciTech Connect

Photoconductive Power Switches (PCPSs) have the advantages of precise control, extremely fast closure times, extremely low inductances and scalability to very high voltages and currents. PCPSs have these advantages because the size or power of the switch is not related to its closure time. The closure time is determined by the external optical source that uniformly illuminates the PCPS between the electrodes. Because carriers are generated uniformly between the electrodes at the desired density, current can flow through the switch immediately without waiting for carrier transient delays. The operating voltage is determined by the switch length l, and the operating current is determined by the switch width w. The electrodes can be made as wide as desired so that the inductance can be extremely low, or the area available for heat removal can be increased and the entire switch brough into conduction at the same instant if the same optical pulse and path length are used. This paper describes recent research at Los Alamos that has improved PCPS contact fabrication technology, has developed a simple optical control illumination system using fiber optics and rectangular optics, and has improved photoconductor surface fabrication methods and processes for high electric field operation.

Nunnally, W.C.; Hammond, R.B.; Wagner, R.S.

1984-01-01

229

Design and development of a constant current power source  

NASA Astrophysics Data System (ADS)

The design and development of a low cost, lab built constant current power source to be used in the DC electrical resistivity testing of high temperature superconductors is described. The power source must generate a test current which varies little if at all as the load resistance RL of a cuprate superconductor sample varies from about 2,? at room temperature to zero below the critical temperature TC. A constant voltage source provides a variable current as RL changes and needs a series resistor to prevent an overload condition as RL,,. A constant current source provides a variable potential and does not need a protecting series resistor whose presence may introduce extraneous thermal noise into the resistivity data. The output current is regulated by the use of a current mirror device, which when thermodynamically stable gives adequate results. A change from RL=45,,,.1% to a short circuit condition results in a current ?% of about 10%. Construction of such a device can be used as a project in an electronics or solid-state physics laboratory for advanced undergraduates in addition to being part of a low cost undergraduate superconductor test facility.

Mendoza, William

2005-11-01

230

Power and developing indigenous human capability in a developed western nation: the case of New Zealand M?ori  

Microsoft Academic Search

This paper links the notion of power or capacity to act with developing human capability. The notion of power as a driver of, or a barrier to, developing human capability seldom explicitly enters the discourse. In addition the notion that, in a social formation where the predominant social relations are capitalist, there are other dimensions to power which systematically favour

Paul O'Neil; Jane Bryson; Helen Lomax

231

Power Systems Development Facility: Filter element evaluation during combustion testing  

SciTech Connect

The Power Systems Development Facility (PSDF) is a Department of Energy (DOE) sponsored engineering scale demonstration of two advanced coal-fired power systems. Particulate cleanup is achieved by utilizing High Temperature, High Pressure (HTHP) gas filtration systems. The PSDF was designed at sufficient scale so that advanced power systems and components could be tested in an integrated fashion to provide confidence and data for commercial scale-up. Since August 1996, almost 5000 hours of combustion testing has been completed at the PSDF. All of the hot combustion gas produced by the Kellogg Brown and Root (KBR) transport reactor has been filtered by a Siemens-Westinghouse Power Company (SWPC) Particulate Control Device (PCD). The transport reactor is an advanced circulating fluidized bed reactor designed to operate as either a combustor or a gasifier. The PCD is designed to filter nominally 1000 acfm of HTHP gas at temperatures up to 1550 F (840 C) and pressures up to 280 psig (19 bar, g). The PCD can hold up to 91 filter elements. To date, 16 different types of filter elements have been tested in the PCD at operating temperatures up to 1450 F (785 C). The elements tested include filter elements from 3M Ceramic Fiber Products, Albany International Techniweave, AlliedSignal Composites (formerly DuPont Lanxide), Blasch Precision Ceramics, Coors Ceramics, Ensto Ceramics Oy, Industrial Filter and Pump, McDermott, Pall Advanced Separations, Specific Surface and U.S. Filter/Schumacher. Filter elements have been installed in the PCD thirteen different times since August 1996. Typically, a variety of elements from several manufacturers have been simultaneously installed. While this has presented its own set of challenges, this ``side-by-side'' comparison has provided valuable insight into how the filter elements perform under a variety of conditions. The filter elements tested at the PSDF can be divided into four different groups: monolithic oxide filter elements, monolithic silicon carbide filter elements, composite filter elements and metal filter elements. Testing of the filter elements in the PCD as well as destructive material testing at Southern Research Institute has shown that each group of elements has advantages and disadvantages due to the material type and method of construction. Overall, the filter elements have worked well at the PSDF, with some performing better than others. Understanding the nature of each material and its shortcomings is key to the successful operation of a HTHP gas filter system.

Davidson, M.; Guan, X.; Hendrix, H.; Shirley, B.

1999-07-01

232

Development of a high permeability cored transintegumental power transformer.  

PubMed

Circulatory support devices require 10-20 W. Currently, several devices are under development for the transmission of this power via transcutaneous transformers, with the secondary implanted subcutaneously and the primary worn externally. Because these devices are air cored, they have relatively large, bulky external appliances, poor coil to coil coupling, and result in significant stray fields passing through adjacent tissues. This article reports on the engineering design of a novel, high permeability cored transformer implanted in a transenteric configuration using an isolated intestinal pouch. Such an approach offers greater energy transmission efficiency, less heat dissipation, less stray electromagnetic energy, and greatly reduced device size. Two competing designs using this concept have been developed and tested. Each consists of the transformer, together with power interface electronics, forming a direct current (DC)/DC resonant converter. Operating frequencies are 90.2 and 14.7 kHz, respectively, with primary/secondary turns ratios of 10/10 and 11/14, respectively. In addition, data interface electronics allows communication across the transformer of up to four signals at a per channel sample rate of 10 Hz. Both designs are able to continuously transmit 25 W at an output level of 12 Vdc into a 5.8 omega load. Calorimetry tests indicate DC to DC efficiencies greater than 75% and coil to coil efficiencies greater than 96%. Total package size for the implantable portion of each device (including sensor internal interface electronics) is less than 40 ml, with a weight weight of less than 100 g. The results of short-term implantation studies have been favorable. Long-term implantation studies currently are under way. PMID:8944956

Helmicki, A J; Melvin, D M; Henderson, H T; Nebrigic, D; Venkat, R; Glos, D L

233

Development of an Organic Rankine-Cycle power module for a small community solar thermal power experiment  

NASA Astrophysics Data System (ADS)

An organic Rankine-cycle (ORC) power module was developed for use in a multimodule solar power plant to be built and operated in a small community. Many successful components and subsystems, including the reciever, power conversion subsystem, energy transport subsystem, and control subsystem, were tested. Tests were performed on a complete power module using a test bed concentrator in place of the proposed concentrator. All major single-module program functional objectives were met and the multimodule operation presented no apparent problems. The hermetically sealed, self-contained, ORC power conversion unit subsequently successfully completed a 300-hour endurance run with no evidence of wear or operating problems.

Kiceniuk, T.

1985-01-01

234

On-Site Fuel Cell Power Plant Technology Development Program.  

National Technical Information Service (NTIS)

Fuel cell power plant designs, specifications and technologies were evaluated to define a power plant approach having the potential for meeting initial on-site commercial service market requirements and costs. An initial commercial market segment was defi...

A. P. Mientek

1982-01-01

235

Nuclear Power - Status and Development 1983/1984.  

National Technical Information Service (NTIS)

A review of the present global position of nuclear power is given. Topics as power-generating capacity, reactor economy, reactor operation experience and uranium resources and demand are briefly dealt with. 7 references. (Atomindex citation 16:035370)

R. O. Lingjaerde

1984-01-01

236

Nuclear Power - Status and Development 1985/1986.  

National Technical Information Service (NTIS)

A review of the present global position of nuclear power is given. Topics as power-generating capasity, reactor economy, reactor operation experience, uranium requirement, and reprocessing of spent fuel are briefly dealt with. (ERA citation 12:022481)

R. O. Lingjaerde

1986-01-01

237

The development of ozone generation with low power consumption  

Microsoft Academic Search

This paper proposed the use of low power and low cost high frequency, high voltage resonant inverter as power supply to produce ozone gas at normal atmospheric pressure and ambient temperature. The modified class E resonant power converter is studied based on modified boost converter. The advantage of resonance phenomena used to convert the square waveform voltage input into sinusoidal

Mochammad Facta; Z. bin Salam; Z. Bin Buntat

2009-01-01

238

TPV power source development for an unmanned undersea vehicle  

Microsoft Academic Search

The thermophotovoltaic (TPV) generation of electrical power promises efficiencies that are exploitable for military and commercial applications. TPV offers a combination of unique characteristics as a power source for military Unmanned Undersea Vehicles. In civilian applications TPV technology offers the potential for lightweight, rugged, and reliable power systems that can be environmentally benign. These systems can use a variety of

Glenn A. Holmquist

1995-01-01

239

Development and testing of improved statistical wind power forecasting methods  

Microsoft Academic Search

Wind power forecasting (WPF) provides important inputs to power system operators and electricity market participants. It is therefore not surprising that WPF has attracted increasing interest within the electric power industry. In this report, we document our research on improving statistical WPF algorithms for point, uncertainty, and ramp forecasting. Below, we provide a brief introduction to the research presented in

J. Mendes; R. J. Bessa; H. Keko; J. Sumaili; V. Miranda; C. Ferreira; J. Gama; A. Botterud; Z. Zhou; J. Wang

2011-01-01

240

Development of voltage stability constrained optimal power flow (VSCOPF)  

Microsoft Academic Search

This paper presents an application of optimization techniques incorporating voltage stability constraints. L-index that indicates voltage collapse proximity is adapted into the OPF formulation. This paper shows the impact of incorporation of voltage security constraint into optimal power flow formulation in which the active power dispatch problem is associated with guaranteeing adequate voltage security levels in power systems. It provides

S. Kim; T.-Y. Song; M.-H. Jeong; B. Lee; Y.-H. Moon; J.-Y. Namkung; G. Jang

2001-01-01

241

Development Project of Supercritical-water Cooled Power Reactor  

SciTech Connect

A Supercritical-water Cooled Power Reactor (SCPR) development project (Feb. 2001- Mar. 2005) is being performed by a joint team consisting of Japanese universities and nuclear venders with a national fund. The main objective of this project is to provide technical information essential to demonstration of SCPR technologies through concentrating three sub-themes: 'plant conceptual design', 'thermohydraulics', and 'material and water chemistry'. The target of the 'plant conceptual design sub-theme' is simplify the whole plant systems compared with the conventional LWRs while achieving high thermal efficiency of more than 40 % without sacrificing the level of safety. Under the 'thermohydraulics sub-theme', heat transfer characteristics of supercritical-water as a coolant of the SCPR are examined experimentally and analytically focusing on 'heat transfer deterioration'. The experiments are being performed using fron-22 for water at a fossil boiler test facility. The experimental results are being incorporated in LWR analytical tools together with an extended steam/R22 table. Under the 'material and water chemistry sub-theme', material candidates for fuel claddings and internals of the SCPR are being screened mainly through mechanical tests, corrosion tests, and simulated irradiation tests under the SCPR condition considering water chemistry. In particular, stress corrosion cracking sensitivity is being investigated as well as uniform corrosion and swelling characteristics. Influences of water chemistry on the corrosion product characteristics are also being examined to find preferable water condition as well as to develop rational water chemistry controlling methods. (authors)

Kataoka, K.; Shiga, S. [Toshiba Corporation, 8, Shinsugita-cho, Isogo-ku, Yokohama, 235-8517 (Japan); Moriya, K. [Hitachi, Ltd. (Japan); Oka, Y. [Univ. of Tokyo (Japan); Yoshida, S. [Kyushu Univ. (Japan); Takahashi, H. [Hokkaido Univ. (Japan)

2002-07-01

242

DEVELOPMENT AND TESTING OF HIGH POWER RF VECTOR MODULATORS*  

SciTech Connect

A fan-out RF power distribution system can allow many accelerating cavities to be powered by a single high-power klystron amplifier. High-power vector modulators can perform independent control of amplitudes and phases of RF voltages at the cavities without changing the klystron signal. A prototype highpower RF vector modulator employing a quadrature hybrid and two ferrite phase shifters in coaxial TEM transmission lines has been built and tested for 402.5 MHz. RF properties of the design and results of high power testing are presented.

Kang, Yoon W [ORNL; Wilson, Joshua L [ORNL; Champion, Mark [FNAL; Hardek, Thomas W [ORNL; Kim, Sang-Ho [ORNL; McCarthy, Mike [ORNL; Vassioutchenko, Alexandre V [ORNL

2007-01-01

243

Power Systems Development Facility Gasification Test Run TC07  

SciTech Connect

This report discusses Test Campaign TC07 of the Kellogg Brown & Root, Inc. (KBR) Transport Reactor 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 Reactor is an advanced circulating fluidized-bed reactor designed to operate as either a combustor or a gasifier using a particulate control device (PCD). The Transport Reactor was operated as a pressurized gasifier during TC07. Prior to TC07, the Transport Reactor was modified to allow operations as an oxygen-blown gasifier. Test Run TC07 was started on December 11, 2001, and the sand circulation tests (TC07A) were completed on December 14, 2001. The coal-feed tests (TC07B-D) were started on January 17, 2002 and completed on April 5, 2002. Due to operational difficulties with the reactor, the unit was taken offline several times. The reactor temperature was varied between 1,700 and 1,780 F at pressures from 200 to 240 psig. In TC07, 679 hours of solid circulation and 442 hours of coal feed, 398 hours with PRB coal and 44 hours with coal from the Calumet mine, and 33 hours of coke breeze feed were attained. Reactor operations were problematic due to instrumentation problems in the LMZ resulting in much higher than desired operating temperatures in the reactor. Both reactor and PCD operations were stable and the modifications to the lower part of the gasifier performed well while testing the gasifier with PRB coal feed.

Southern Company Services

2002-04-05

244

Power Systems Development Facility. Quarterly report, July--September 1995  

SciTech Connect

The objective of this project is to evaluate hot gas particle control technologies using coal-derived gas streams. This will entail the design, construction, installation, and use of a flexible test facility which can operate under realistic gasification and combustion conditions. The major particulate control device issues to be addressed include the integration of the particulate control devices into coal utilization systems, on-line cleaning techniques, chemical and thermal degradation of components, fatigue or structural failures, blinding, collection efficiency as a fimction of particle size, and scale-up of particulate control systems to commercial size. The conceptual design of the facility was extended to include a within scope, phased expansion of the existing Hot Gas Cleanup Test Facility Cooperative Agreement to also address systems integration issues of hot particulate removal in advanced coal-based power generation systems. This expansion included the consideration of the following modules at the test facility in addition to the original Transport Reactor gas source and hot gas cleanup units: carbonizer/pressurized circulating fluidized bed gas source; hot gas cleanup units to mate to all gas streams; combustion gas turbine; and fuel cell and associated gas treatment. This expansion to the Hot Gas Cleanup Test Facility is herein referred to as the Power Systems Development Facility (PSDF). The major emphasis during this reporting period was continuing the detailed design of the facility towards completion and integrating the balance-of-plant processes and particulate control devices (PCDS) into the structural and process designs. Substantial progress in construction activities was achieved during the quarter. Delivery and construction of the process structural steel is nearing completion. Nearly all equipment are set in its place and the FW equipment and the PCDs are being set in the structure.

NONE

1995-11-01

245

Development of tidal and ocean current power plant using elastic turbine  

Microsoft Academic Search

High power generating cost is a important problem in a sustainable energy. In order to reduce the cost for the power generation, passive power control using elastic turbine blade made of composites is adopted. In this study, the performance evaluation system with fluid-structure interaction analysis and water tank tests has been developed to design the passive power control property and

Y. Minami; T. Nimura; N. Sasaki; H. Murayama; K. Uzawa; H. Wada

2011-01-01

246

The waiting game. [Development of independent power projects in North America  

Microsoft Academic Search

Independent power companies are facing numerous changes in power markets across North America. While changes bring uncertainty, they also hold promise for future competitive power opportunities. In Mexico, developers are awaiting the final versions of laws concerning outside ownership of the country's power capacity. The slow process of formalizing these regulations, combined with recent social unrest in southern Mexico, is

Burr

1994-01-01

247

Development Status of a Power Processing Unit for Low Power Ion Thrusters.  

National Technical Information Service (NTIS)

An advanced breadboard Power Processing Unit (PPU) for a low power ion propulsion system incorporating mass reduction techniques was designed and fabricated. As a result of similar output current requirements, the discharge supply was also used to provide...

E. M. Lafontaine G. E. Bowers L. R. Pinero

2000-01-01

248

Developing a harmonics education facility in a power system simulator for power engineering education  

Microsoft Academic Search

This paper describes a newly installed harmonics education facility in detail to teach students about harmonics related problems in a power system. A nonlinear load, which produces harmonic currents, and a harmonic filter, which is a mitigation facility, are merged into an existing power system simulator for advanced power engineering education. The nonlinear load is a widely used three-phase, 6-pulse

Chi-Jui Wu; Wei-Nan Chang

1997-01-01

249

Nuclear power technologies at the stage of sustainable nuclear power development  

Microsoft Academic Search

It is not simple to solve the problem of competitiveness of nuclear power technologies in evolutionary upgrading the conventional nuclear power plants (NPP) such as light water reactors (LWR), which requires high expenditure for safety. Moreover, the existing LWRs cannot provide nuclear power (NP) for a long time (hundreds of years) because the efficiency of use of natural uranium is

G. I. Toshinsky; O. G. Komlev; K. G. Mel’nikov

2011-01-01

250

High-Average-Power W-band TWT Development  

Microsoft Academic Search

A PPM-focused TWT for airborne applications producing over 400 W of peak RF output power at 90.6 GHz and average-power levels between 150 and 180 W is described. Design goals of 1% bandwidth, 250 W of peak power, and 30 dB of gain have all been met despite the invariable fabrication errors in this nascent type of tube. The TWT

Alan J. Theiss; Clark J. Meadows; Ray Freeman; Richard B. True; J. Michael Martin; Keith L. Montgomery

2010-01-01

251

Development of High Average Power Nonlinear Frequency Conversion Devices  

NASA Astrophysics Data System (ADS)

This program developed microstructured nonlinear optical materials and quasi-phasematched devices based on those materials. The two material systems investigated, periodically-poled ferroelectrics, especially lithium niobate (PPLN), and orientation-patterned GaAs (OP-GaAs) enable nonlinear interactions impossible in conventional nonlinear media. This work included the generation of the shortest blue light pulse then reported (5,4 fs), demonstration of orientation patterned GaAs (OP-GaAs), a mid-IR analog for PPLN operating to wavelengths greater than 12 micrometers with 10 times larger nonlinear figure of merit than PPLN, vapor transport synthesis of stoichiometric lithium tantalate (with no measurable room-temperature photorefractive damage), chirped-pulse parametric amplifiers generating millijoule ultrafast pulses in a simple single-pass configuration, guided-wave frequency mixers with efficiencies of 3000%/W, enabling demonstration of extreme phenomena such as 99% pump depleted SHG (with only 900 mW pump power), and optical parametric generators with 300 pJ thresholds. Significant projects seeded by the work in this program have been spun off as industry-supported projects. In particular optical signal processing devices for communications based on the waveguide mixers, and IRCM applications of the OP-GaAs.

Fejer, Martin M.; Route, Robert K.

2002-08-01

252

New development in high resolving power W-Si calorimeters  

SciTech Connect

The Relativistic Heavy Ion Collider (BNL) collides heavy nuclei and creates a strongly coupled medium at unprecedented density and temperature. Characteristic event structures may be efficiently selected with calorimeters, which can provide triggers on high-pT particles, 'jets' of particles, or large transverse energy, along with precision measurements of the structures. The importance of calorimeters in studies of ultrarelativistic heavy-ion collisions was first recognized by W.Willis. The key requirements are photon identification and measurements, and high resolving power to handle extreme occupancies common to this kind of interactions. We present a fully developed and beam tested concept of the W-Si sampling calorimeter built to this specifications. Novel features of this design are concepts of silicon micromodules, use of microconnectors for the silicon alignment purposes and passive signal summation to form readout towers. A prototype calorimeter was built in collaboration between BNL and a number of University groups from USA, Russia, Korea, Finland and Czech Republic and exposed to particle beams at CERN PS and SPS.

Kistenev E.; PHENIX Collaboration

2011-10-01

253

Development of molten carbonate fuel cell power plant technology  

NASA Astrophysics Data System (ADS)

A prototype molten carbonate fuel cell stack which meets the requirements of a 1990's-competitive, coal-fired electrical utility central station, or industrial cogeneration power plant was developed. Compressive creep testing of the present anode is continuedl the samples and support the earlier data showing improved creep resistance. Testing to define the operating limits that are suitable for extending the life of nickel oxide cathodes to an acceptable level is continuing. The mechanical characteristics of several one-piece cathode current collector candidates are measured for suitability. Metallographic evaluation of stack separators was initiated. Posttest characterization of surface treated INCO 825 was completed, retort corrosion testing of this material is continuing, potentiostatic immersion testing of alternative single piece cathode current collector materials is initiated. The 20-cell Stack No. 3 progressed from completion and delivery of the Test Plan through Design Review, assembly, and initial heat-up for the start of testing. Manufacture of separator plates for the upcoming 20-cell Stack No. 4 has begun. The primary objective of this follow-on test is stack cost reduction.

Bushnell, C. L.; Davis, C. L.; Dayton, J. E.; Johnson, C. K.; Katz, M.; Krasij, M.; Kunz, H. R.; Maricle, D. L.; Meyer, A. P.; Pivar, J. C.

1984-09-01

254

Power Systems Development Facility Gasification Test Run TC10  

SciTech Connect

This report discusses Test Campaign TC10 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 TC10 in air- (mainly for transitions and problematic operations) and oxygen-blown mode. Test Run TC10 was started on November 16, 2002, and completed on December 18, 2002. During oxygen-blown operations, gasifier temperatures varied between 1,675 and 1,825 F at pressures from 150 to 180 psig. After initial adjustments were made to reduce the feed rate, operations with the new fluidized coal feeder were stable with about half of the total coalfeed rate through the new feeder. However, the new fluidized-bed coal feeder proved to be difficult to control at low feed rates. Later the coal mills and original coal feeder experienced difficulties due to a high moisture content in the coal from heavy rains. Additional operational difficulties were experienced when several of the pressure sensing taps in the gasifier plugged. As the run progressed, modifications to the mills (to address processing the wet coal) resulted in a much larger feed size. This eventually resulted in the accumulation of large particles in the circulating solids causing operational instabilities in the standpipe and loop seal. Despite problems with the coal mills, coal feeder, pressure tap nozzles and the standpipe, the gasifier did experience short periods of stability during oxygenblown operations. During these periods, the syngas quality was high. During TC10, the gasifier gasified over 609 tons of Powder River Basin subbituminous coal and accumulated a total of 416 hours of coal feed, over 293 hours of which were in oxygen-blown operation. No sorbent was used during the run.

Southern Company Services

2002-12-30

255

Development of 70kV, 22A DC power supply for High Power RF and microwave tubes  

NASA Astrophysics Data System (ADS)

Our institute (IPR) is involved in the development of High Power RF and Microwave sources for various fusion related heating and current drive applications. All the high power RF and microwave tubes e.g. Klystron, Gyrotron tetrode etc need a high voltage DC power supply to deliver the required high power with necessary protections. To cater to the initial testing and commissioning requirements, the development of 70kV, 22A power supply is initiated. The supply ratings are chosen to meet general tube requirements i.e. Klystron, Gyrotron and Tetrode used in RF group. The supply would be a part of test facility, rather than a regular supply for use in an experiment. Hence some ripple and regulation requirements are relaxed to optimize the cost. However all protections including crowbar protection are accommodated. This supply when ready enables continuous full power testing of TH 2103D Klystrons, GLGD-82.6/0.2 Gyrotron and short time (3Sec-"ON", 120Sec-"OFF") full power testing of 1.5MW Tetrode. This paper presents analysis of requirements of various tubes, power supply rating optimization, topology selection, protection requirements and other facilities required. Remote monitoring through DAC and remote control requirement from various locations, are highlighted. Present status of development is mentioned.

Srinivas, Y. S. S.; Babu, Rajan; Makwana, Azad; Parmar, Kirit; Kulkarni, S. V.; Rf Group

2010-02-01

256

High power gas laser - Applications and future developments  

Microsoft Academic Search

Fast flow can be used to create the population inversion required for lasing action, or can be used to improve laser operation, for example by the removal of waste heat. It is pointed out that at the present time all lasers which are capable of continuous high-average power employ flow as an indispensable aspect of operation. High power laser systems

A. Hertzberg

1977-01-01

257

Bi-Directional Four Quadrant (BDQ4) Power Converter Development.  

National Technical Information Service (NTIS)

The feasibility for implementation of a concept for direct ac/dc multikilowatt power conversion with bidirectional transfer of energy was investigated. A 10 kHz current carrier was derived directly from a common 60 Hz three phase power system. This carrie...

F. C. Schwarz

1979-01-01

258

Development plan for advanced fossil fuel power plants. Final report  

Microsoft Academic Search

The slowdown in the growth of nuclear power, and the high cost of natural gas and oil, has projected coal into the position of being the prime energy resource of the future. While several options for burning coal show good promise for the future (liquefaction, fluidized beds and gasification, for example), it is likely that most of the new power

R. D. Hottenstine; N. A. Phillips; R. L. Dail

1985-01-01

259

Development of Next Generation Segmented Thermoelectric Radioisotope Power Systems  

Microsoft Academic Search

Radioisotope thermoelectric generators have been used for space-based applications since 1961 with a total of 22 space missions that have successfully used RTGs for electrical power production. The key advantages of radioisotope thermoelectric generators (RTGs) are their long life, robustness, compact size, and high reliability. Thermoelectric converters are easily scalable, and possess a linear current-voltage curve, making power generation easy

J. Fleurial; T. Caillat; R. C. Ewell

2005-01-01

260

Power Systems Development Facility. Technical Progress Report Gasification Test Run GCT3.  

National Technical Information Service (NTIS)

This report discusses test campaign GCT3 of the Halliburton KBR transport reactor train with a Siemens Westinghouse Power Corporation (Siemens Westinghouse) particle filter system at the Power Systems Development Facility (PSDF) located in Wilsonville, Al...

2002-01-01

261

Power Systems Development Facility: High Temperature, High Pressure Filtration in Gasification Operation.  

National Technical Information Service (NTIS)

High temperature, high pressure gas filtration is a fundamental component of several advanced coal-fired power systems. This paper discusses the hot-gas filter vessel operation in coal gasification mode at the Power Systems Development Facility (PSDF). Th...

R. A. Martin B. Gardner X. Cuan H. Hendrix

2005-01-01

262

Photovoltaic power conditioning subsystem: state of the art and development opportunities  

SciTech Connect

Photovoltaic sytems, the state of the art of power conditioning subsystem components, and the design and operational interaction between photovoltaic systems and hot utilities are detailed in this document. Major technical issues relating to the design and development of power conditioning systems for photovoltaic application are also considered, including: (1) standards, guidelines, and specifications; (2) cost-effective hardware design; (3) impact of advanced components on power conditioning development; (4) protection and safety; (5) quality of power; (6) system efficiency; and (7) system integration with the host utility. In addition, theories of harmonic distortion and reactive power flow are discussed, and information about power conditioner hardware and manufacturers is provided.

Krauthamer, S.; Bahrami, K.; Das, R.; Macie, T.; Rippel, W.

1984-01-15

263

Citizen involvement in energy decision making. [Nuclear power development  

SciTech Connect

Citizen involvement in public policy formation is not a new concept, but it is still a highly controversial issue. While few people deny that citizens should have a role in public policy decisions, there is little agreement regarding the nature or extent of this citizen participation role. At one extreme is the belief that the citizen role in government ends at the ballot box. At the other extreme is the belief that citizens should have ultimate control over all public policy decisions. Between the two extremes are roles such as (a) information and education recipients, (b) advisory group members, (c) partners with decision makers, and (d) partial controllers of specific aspects of a policy-making process. Proponents of a more active role for citizens argue that citizens are the best judges of all basic policy decisions and that policies formulated without citizen involvement are likely to meet with resistance and/or be ineffective in meeting people's needs. Opponents of extensive citizen involvement, meanwhile, maintain that citizens have only a narrow and often misinformed view of the need for and ramifications of certain policies. In practice, most citizen involvement efforts have been fairly limited in scope, they have played mostly advisory roles in the public policy-making arena. Little attention has been given, however, to how citizens view the various roles and techniques for implementing citizen influence in public decision making, or to what people mean by success in citizen participation. The purpose of the study reported in this paper was to learn more about the perceived effectiveness and appropriateness of various citizen influence techniques. This research focuses on nuclear power decision making because of its visibility as both a local and national issue, and because it is representative of other resource development issues in which citizens are becoming highly involved.

Curry, M.G.; Olsen, M.E.

1977-03-01

264

Development and analysis for core power gamma thermometer adaptation  

SciTech Connect

The gamma thermometer (GT) has gained increasing interest to replace the local power range monitor (LPRM) and the traversing in-core probe (TIP) as the core monitoring device in new boiling water reactor (BWR) designs. The number of GTs is designed between the number of LPRMs, 4, and the number of TIPs, 24, per string, but its optimal number is yet to be determined. The authors have modified the BWR core Simulator PANACEA for analyzing the core power GT adaptation and have compared the axial core-averaged relative power distributions and two thermal limits of the GT 8- and 12-point adaptations against those of the TIP 24-point adaptation.

Ren-Tai Chiang; Leong, T. [General Electric Co., San Jose, CA (United States)

1996-12-31

265

Development and Application of the High Bandwidth Powered Resonance Tube.  

National Technical Information Service (NTIS)

The Powered Resonance Tube (PRT) actuator, which is an adaptation of the Hartmann whistle, was selected for bandwidth enhancement. The operation and near field features of this actuator were characterized both experimentally and computationally. An improv...

A. Cain G. Raman E. Kerschen C. Nelson

2005-01-01

266

Design and development of a solar grain dryer incorporating photovoltaic powered air circulation  

Microsoft Academic Search

A solar grain dryer with photovoltaic powered air circulation has been designed, developed and tested in the field. The important feature in this new dryer is the use of photovoltaic solar cells incorporated in the solar air heater section to power a d.c. fan. This photovoltaic powered air circulation induces passive control over the drying air temperature. The dryer can

J. Mumba

1996-01-01

267

Power Systems Development Facility: High Temperature, High Pressure Filter System Operations in a Combustion Gas  

Microsoft Academic Search

The Power Systems Development Facility (PSDF) is a Department of Energy (DOE) sponsored engineering scale demonstration of two advanced coal-fired power systems and several High Temperature, High Pressure (HTHP) gas filtration systems. The PSDF was designed at sufficient scale so that advanced power systems and components could be tested in an integrated fashion to provide confidence and data for commercial

M. Davidson; X. Guan; H. Hendrix; P. Scarborough; Robert S. Dahlin; E. Carl Landham

2000-01-01

268

Development of the conventional and the nuclear power station capacity of the Electricite de France  

Microsoft Academic Search

Investigations were conducted on the increase in electricity consumption ; in France, the method used for selecting the different power station types, and ; the future development of conventional and nuclear power station capacity. ; Finally some data concerning the problems which arise in connection with the ; protection of the environment and with the location of the power stations

G. Krivine; J. F. Lagarde

1973-01-01

269

Developing an integrated resource plan and planning process at Puget Power  

SciTech Connect

This paper discusses the progress that Puget Sound Power and Light Company has made in pursuing a new project, Demand and Resource Evaluation (DARE), which began in early 1986. The purposes of DARE are to strengthen the integrated planning process within Puget Power and to develop an integrated resource plan for Puget Power.

Hirst, E.; Knutsen, C.

1987-01-01

270

Experience in the operation of nuclear power plants and prospects for nuclear-power development in France  

Microsoft Academic Search

The author explains how the NFG managed to obtain a considerable increase in nuclear-power capacity and also describes the organization of the process. Also discussed are the most important questions arising in the operation of nuclear power plants which were successfully settled by the EDG. The author presents the scientific-research programs and large-scale developments aimed at maintaining and raising the

Leclerc

1987-01-01

271

Real time test bed development for power system operation, control and cyber security  

NASA Astrophysics Data System (ADS)

The operation and control of the power system in an efficient way is important in order to keep the system secure, reliable and economical. With advancements in smart grid, several new algorithms have been developed for improved operation and control. These algorithms need to be extensively tested and validated in real time before applying to the real electric power grid. This work focuses on the development of a real time test bed for testing and validating power system control algorithms, hardware devices and cyber security vulnerability. The test bed developed utilizes several hardware components including relays, phasor measurement units, phasor data concentrator, programmable logic controllers and several software tools. Current work also integrates historian for power system monitoring and data archiving. Finally, two different power system test cases are simulated to demonstrate the applications of developed test bed. The developed test bed can also be used for power system education.

Reddi, Ram Mohan

272

Development of Improved Burnable Poisons for Commercial Nuclear Power Reactors  

Microsoft Academic Search

Burnable poisons are used in all modern nuclear reactors to permit higher loading of fuel without the necessity of an overly large control rod system. This not only permits a longer core life but can also be used to level the power distribution. Commercial nuclear reactors commonly use BâC in separate non-fueled rods and more recently, zirconium boride coatings on

Renier

2002-01-01

273

Less is more when developing PowerPoint Animations  

Microsoft Academic Search

Over the last decade PowerPoint has become the medium of choice for many instructors. The software provides animation options for the emphasis, entrance, or disappearance of text and figures. Many instructors use these options regularly with the intuition that such effects enhance student learning by allowing concepts to be introduced incrementally. This research explores the impact of custom animation in

Steve Mahar; Ulku Yaylacicegi; Thomas N. Janicki

2008-01-01

274

The solar power satellite - A programme for development aid  

Microsoft Academic Search

It is pointed out that there are essentially four types of foreign aid. These types include the transfer of knowledge, the transfer of materials, the transfer of funds, and the provision of preferential agreements. A great number of studies have been conducted to assess the pros and cons of a Solar Power Satellite System (SPSS). According to many, the most

R. C. Meiner

1983-01-01

275

A Ricardian Theory of Hydroelectric Power Development: Some Canadian Evidence  

Microsoft Academic Search

Once a hydroelectric power site is operational, its production is constrained both by the available hydraulic energy that drives the turbines and by the installed capacity that limits the pace at which hydraulic energy can be turned into electricity. Different costs are associated with these two constraints. Assuming generating equipment mix cost minimization, the optimal stacking order under the load

Jean-Thomas Bernard

1989-01-01

276

Development of a photovoltaic power supply for wireless sensor networks.  

SciTech Connect

This report examines the design process of a photovoltaic (solar) based power supply for wireless sensor networks. Such a system stores the energy produced by an array of photovoltaic cells in a secondary (rechargeable) battery that in turn provides power to the individual node of the sensor network. The goal of such a power supply is to enable a wireless sensor network to have an autonomous operation on the order of years. Ideally, such a system is as small as possible physically while transferring the maximum amount of available solar energy to the load (the node). Within this report, there is first an overview of current solar and battery technologies, including characteristics of different technologies and their impact on overall system design. Second is a general discussion of modeling, predicting, and analyzing the extended operation of a small photovoltaic power supply and setting design parameters. This is followed by results and conclusions from the testing of a few basic systems. Lastly, some advanced concepts that may be considered in order to optimize future systems will be discussed.

Harvey, Matthew R.; Kyker, Ronald D.

2005-06-01

277

Biomass power for rural development. Revised design report.  

SciTech Connect

The retrofit of Dunkirk Steam Station to fire biomass fuels is an important part of the Consortium's goal--demonstrating the viability of commercial scale willow energy crop production and conversion to power. The goal for th biomass facilities at Dunkirk is to reliably cofire a combination of wood wastes and willow biomass with coal at approximately 20% by heat input.

Neuhauser, Edward

1999-10-03

278

Development of 3 and 5 kW fuel cell power plants  

Microsoft Academic Search

Phosphoric acid fuel cell power plants for use as tactical utility power sources have been developed. The power plants operate on 58% methanol-42% water fuel. Two fully automatic 3kW units were built, tested, and delivered. Thermal efficiency was 23% with ac and 26% with dc output. A brassboard 3kW power plant operating on neat methanol was also constructed, tested, and

S. Abens; M. Farooque

1985-01-01

279

Technology development required by propfan power reduction gearboxes  

SciTech Connect

The design requirements for the propfan transmission are discussed, with respect to the power-turbine and the fan speed ranges required for advanced aircraft, and the weight, reliability, maintenance, safety, and quietness aspects. Particular attention is given to the mechanical characteristics of the materials and the configuration of the planet gear and carrier and the ring gear. The design of the oil system is also considered.

Battezzato, L.; Pias, R.

1989-01-01

280

Development of fuel-cell-powered electric bicycle  

Microsoft Academic Search

The design, fabrication, and testing of a prototype of electric bicycle powered by a proton exchange membrane fuel cell (PEMFC) is reported. The fuel-cell system is composed of a 300-W fuel-cell stack, metal hydride canisters, air pumps, solenoid valves, cooling fans, pressure and temperature sensors, and a microcontroller. To reduce cost, all components are commercially available except for the microcontroller,

J. J Hwang; D. Y Wang; N. C Shih; D. Y Lai; C. K Chen

2004-01-01

281

Economics and nuclear weapons nonproliferation in nuclear power development scenarios  

Microsoft Academic Search

The method of quantile estimates of uncertainties is used to forecast the economic indices of objects of nuclear power and\\u000a to analyze the uncertainties of the predicted estimates of the balance of nuclear materials and the most likely scenarios\\u000a of nuclear weapons proliferation taking account of the salient aspects of the initial nuclear materials. It is shown that\\u000a methods of

A. N. Rumyantsev

2007-01-01

282

Development of a new Solar Photovoltaic Powered Desalination Plant  

Microsoft Academic Search

Abstract Electricity and fresh drink water are two essential needs for continuation of life by the ,human ,beings. There are unfortunately,a large,number,of people,on the,earth that donot,have ,access ,to a ,reliable electricity and ,fresh water. The objective of this contribution to the conference,is to present the design aspects of a ,solar photovoltaic ,(PV) energy powered desalination system, in which electricity and

A Zahedi

283

Predicting Premature Mortality from New Power Plant Development in Virginia  

Microsoft Academic Search

The authors estimated the number of premature deaths from particulate matter less than 2.5 ?m (PM2.5) that would result from making 29 proposed fossil fuel power plants in Virginia operational. We used a U.S. Environmental Protection Agency air quality model (Climatological Regional Dispersion model) to calculate changes in ambient concentrations of PM2.5 and Cox proportional hazard modeling to calculate the

Richard P. Hermann; Frank Divita; Jack O. Lanier

2004-01-01

284

Development and fabrication of improved power transistor switches  

Microsoft Academic Search

A new class of high-voltage power transistors was achieved by adapting present interdigitated thyristor processing techniques to the fabrication of npn Si transistors. Present devices are 2.3 cm in diameter and have V sub CEO (sus) in the range of 400 to 600V. V sub CEO (sus) = 450V devices were made with an (h sub FE)(I sub C) product

P. L. Hower; C. K. Chu

1979-01-01

285

Social Perspectives on Wind-Power Development in West Texas  

Microsoft Academic Search

Since 2000, U.S. wind-energy capacity has increased 24 percent per year, with Texas emerging as the leading state. Multidimensionality, economic decline, and ownership-participation hypotheses dominate recent geographical research on social perspectives toward wind energy. We examine these hypotheses regarding support of wind power from the perspective of a county that leads Texas in installed capacity. Using Q-method, we present empirically

Christian Brannstrom; Wendy Jepson; Nicole Persons

2011-01-01

286

Development of power accumulation-type SiC MOSFET  

Microsoft Academic Search

A new structure of SiC ACCUFET MOSFET for high power applications have been proposed and analyzed by simulation. The new MOSFET has an n-type ion implanted trench region and a MOS structure consisting of a thin surface layer of epitaxially grown n-type SiC. The current flows through then-type ion implanted region, then via accumulation channel of electrons defined in the

Handoko Linewih; Sima Dimitrijev; H. Barry Harrison

1999-01-01

287

CCMR: Development of a High Power Membraneless Fuel Cell  

NSDL National Science Digital Library

Fuel cells can convert the chemical energy from an electrochemical reaction into electrical energy. Typically, hydrogen gas/oxygen gas fuel cells have a proton exchange membrane (PEM) that keeps the fuel and oxidant from mixing and allows protons to travel from the anode surface to the cathode surface. By establishing laminar flow, the Abruña group has been able to eliminate the need for a PEM in a micro fuel cell. Data obtained by running 150mM NaBH4 in 3M NaOH (fuel) and 0.5 M Ce(NH4)2(NO3)6 in 1M HNO3 (oxidant) through these membraneless micro fuel cells indicate that they have much higher power density than most direct methanol fuel cells and use much less fuel. Recently, a scaled up version of these micro fuel cells was built. If this scaled up membraneless fuel cell can be successfully assembled and run using the same fuel and oxidant, then previously obtained performance data indicates that enough power should be generated to power an iPod Nano. It will also indicate that the design is scalable and is commercially practical.

Watts, David J.

2009-08-15

288

Development of high power nickel-cadmium batteries for hybrid vehicles  

Microsoft Academic Search

A new high performance, long life, low cost, nickel cadmium battery has been developed for heavy hybrid vehicles. The Saft STX 600 offers the highest power to weight and longest life available with 500 W\\/kg peak power, 350 W\\/kg at 50% state of charge, and over 600 K cycles at 2% depth of discharge. Development work was funded through a

M. Disosway

1998-01-01

289

DEVELOPMENT OF ULTRASONIC TESTING TECHNIQUE TO INSPECT CONTAINMENT LINERS EMBEDDED IN CONCRETE ON NUCLEAR POWER PLANTS  

Microsoft Academic Search

The purpose of this study is development of ultrasonic testing technique to inspect containment liners embedded in concrete on nuclear power plants. Integrity of containment liners on nuclear power plants can be secured by suitable present operation and maintenance. Furthermore, non-destructive testing technique to inspect embedded liners will ensure the integrity of the containment further. In order to develop the

H. Ishida; Y. Kurozumi; Y. Kaneshima

290

Status of the advanced PFBC at the power systems development facility  

Microsoft Academic Search

The objectives of the Power Systems Development Facility (PSDF) are to develop advanced coal-fired power generation technologies through the testing and evaluation of hot gas cleanup systems and other major components at the pilot scale and to assess and demonstrate the performance of the components in an integrated mode of operation and at a component size easily scaled to commercial

D. L. Moore; Z. Haq; T. E. Pinkston; R. E. Rush; P. Vimalchand; J. D. McClung; M. T. Quandt

1994-01-01

291

Developement of an Integrated Performance Simulator for a Power-assited Bicycle  

Microsoft Academic Search

In this paper, we propose an integrated performance simulator that supports efficient research and development for a power-assisted bicycle. First, we show theoretical conditions modeled as closely as possible to real conditions. We reproduced the conditions on the equipment simulator that we developed, which can experimentally evaluate qualities of the power-assisted bicycle. In addition, we model the performance of the

Kazushige Kakutani; Junji Furusho

2004-01-01

292

A Discussion on the Crisis Management of Small Scale Thermal Power Plant Basing on Sustainable Development  

Microsoft Academic Search

The strategy of sustainable development is one of the two important strategies for Chinese economic development. The present small scale thermal power plants cause much pollution, and consume too much energy, so they are being confronted with the crises of existence and management. Accordingly, it is urgent for small scale thermal power plants to carry out study on the crisis

Shijun Yang; Dongxiao Niu; Yongli Wang

293

Development of Power Poles from Fly Ash. Phase 2. Final Report, April 1980.  

National Technical Information Service (NTIS)

A study to develop a continuous manufacturing process to produce full-size power poles made from fly ash at a competitive price is described. The activity had two major thrusts: to develop a continuous process for the production of fly ash power poles; an...

1980-01-01

294

Status of the advanced PFBC at the power systems development facility.  

National Technical Information Service (NTIS)

The objectives of the Power Systems Development Facility (PSDF) are to develop advanced coal-fired power generation technologies through the testing and evaluation of hot gas cleanup systems and other major components at the pilot scale and to assess and ...

D. L. Moore Z. Haq T. E. Pinkston R. E. Rush P. Vimalchand

1994-01-01

295

Development of a High Power Diode Laser Welding System and Usability for Tailored Blank Processing  

NASA Astrophysics Data System (ADS)

We developed new high power diode lasers and welding system applied to automobile industry. This paper describes the developed machine concept and the possibility of replacement to high power diode laser welding for tailored blank processing which has been performed by CO2 lasers or YAG lasers.

Murakami, Kunio; Kan, Hirofumi

296

Development of a compact Marx generator for high-power microwave applications  

Microsoft Academic Search

One of the goals of the High-Energy Sources Division of the Advanced Weapons and Survivability Directorate at the Phillips Laboratory is to develop high-power microwave sources and their related pulsed power. Here, the development of a compact Marx generator to drive loads with impedances on the order of 10 ohms is discussed. It is an 8 stage design, 4 stages

S. E. Calico; M. C. Scott; M. C. Clark

1997-01-01

297

Advanced heat source development for static and dynamic radioisotope space power systems  

Microsoft Academic Search

An advanced radioisotope heat source development for spacecraft power ; systems using thermoelectric generators or Brayton, Rankine, or Stirling power ; cycles is described. In the past, the majority of heat sources developed and ; launched have been comprised of one or two capsules containing the total fuel ; inventory in a single reentry heat shield. The new technology in

F. A. Schumann; W. E. Osmeyer

1975-01-01

298

Development and relationship of nuclear power and nuclear weapons. Evolving an acceptable nuclear power fuel cycle  

Microsoft Academic Search

The public's fear of nuclear energy stems from its concern with the following: (1) nuclear power reactor safety, (2) nuclear waste management, and (3) nuclear weapons. Although not a direct concern of the public, the industry is also concerned about a stable supply of nuclear fuel. Each of the above is examined, and some ways are suggested to mitigate these

Steinberg

1984-01-01

299

Nuclear power research and development at the Electric Power Research Institute (EPRI)  

Microsoft Academic Search

This paper reviews EPRI's nuclear power RandD program, whose objectives are to: 1) provide technical resolution of existing significant safety and licensing issues for light water reactors (LWRs); 2) improve the reliability of components and systems of LWR nuclear plants, improving their overall plant availability; 3) take explicit measures to ensure the transfer of this technology in a timely and

1982-01-01

300

Power Systems Development Facility: High Temperature, High Pressure Filtration in Gasification Operation  

SciTech Connect

High temperature, high pressure gas filtration is a fundamental component of several advanced coal-fired power systems. This paper discusses the hot-gas filter vessel operation in coal gasification mode at the Power Systems Development Facility (PSDF). The PSDF, near Wilsonville, Alabama, is funded by the U.S. Department of Energy (DOE), Southern Company, and other industrial participants currently including the Electric Power Research Institute, Siemens Westinghouse Power Corporation, Kellogg Brown & Root Inc. (KBR), and Peabody Energy. The PSDF is an engineering scale demonstration of key features of advanced coal-fired power systems designed at sufficient size to provide data for commercial scale-up.

Martin, R.A.; Guan, X.; Gardner, B.; Hendrix, H.

2002-09-18

301

Observations of Crack Formations and Developments in Ice on Pulsed Power Ice Breaking  

NASA Astrophysics Data System (ADS)

In this research, crack formations and developments in ice on ice breaking by pulsed power were investigated using high-speed camera. The pulsed arc discharge was created in water using Marx generator. Shock wave was produced and propagated in water, and then the ice surface was loaded by pressure of shock wave. Cracks were formed inside ice body, and were developed. A velocity of crack development of 2900 m/s was obtained at a discharge peak power of 160 MW from images of high-speed camera. It was found that the velocity of crack development was increased with increase of discharge peak power.

Ihara, Satoshi; Kominato, Yuichi; Fukuda, Kazuyuki; Ushio, Shuki

302

Flashover lithium ion source development for large pulsed power accelerators  

NASA Astrophysics Data System (ADS)

PBFA II, a light-ion pulsed power accelerator intended for inertial confinement fusion (ICF) applications, is currently under construction at Sandia National Laboratories. The accelerator will deliver a 30 MV, 5 MA lithium beam from an Applied-B diode to drive an ICF target. The ion source for this diode will require a thin (approx. 1 mm), dense (10.cm) anode plasma layer of singly-ionized lithium over an anode area of 10 cm. One type of source being investigated is the flashover ion source, which generates the anode plasma via vacuum flashover of a lithium-bearing dielectric material. Experiments with a LiF flashover source on the 0.03 TW Nereus accelerator have shown that contaminant ions account for as much as 70% of the extracted ion beam current. To overcome this, we have explored in-diode cleaning of the externally-prepared anode surface by flow discharge cleaning and vacuum baking as well as in-diode preparation of the anode surface by vacuum evaporation of the lithium dielectric. Lithium-bearing dielectric materials which have been investigated include LiF, LiI, LiNO, and Li N. These techniques have resulted in a two-to three-fold improvement in the extracted lithium ion purity. As a result, a glow-discharge cleaned LiF flashover source will be used for initial pulsed-power testing on PBFA II.

Bieg, K. W.; Burns, E. J. T.; Gerber, R. A.; Olsen, J. N.; Lamppa, K. P.

303

Development of a high-power lithium-ion battery.  

SciTech Connect

Safety is a key concern for a high-power energy storage system such as will be required in a hybrid vehicle. Present lithium-ion technology, which uses a carbon/graphite negative electrode, lacks inherent safety for two main reasons: (1) carbon/graphite intercalates lithium at near lithium potential, and (2) there is no end-of-charge indicator in the voltage profile that can signal the onset of catastrophic oxygen evolution from the cathode (LiCoO{sub 2}). Our approach to solving these safety/life problems is to replace the graphite/carbon negative electrode with an electrode that exhibits stronger two-phase behavior further away from lithium potential, such as Li{sub 4}Ti{sub 5}O{sub 12}. Cycle-life and pulse-power capability data are presented in accordance with the Partnership for a New Generation of Vehicles (PNGV) test procedures, as well as a full-scale design based on a spreadsheet model.

Jansen, A. N.

1998-09-02

304

Development of a hybrid pneumatic-power vehicle  

Microsoft Academic Search

Many complex technologies have been developed and applied to improve the energy efficiency and exhaust emission of an engine under different driving conditions. The overall thermal efficiency of an internal-combustion engine, however, can be maintained at only about 20–30%, with aggravated problems in the design and development, such as overall difficulty, excessive time consumption or excessively high cost. For electric

K. David Huang; Sheng-Chung Tzeng

2005-01-01

305

Multi-Band Synthesizer, Power Amplifier, and Filter Development.  

National Technical Information Service (NTIS)

This final report describes three research and development projects conducted by Synergy Microwave Corporation for DARPA (Defense Advanced Research Agency). The purpose of these projects was to develop and demonstrate the key sub-systems needed for an u1t...

M. McHenry U. Rohde

2005-01-01

306

Response of Rocky Mountain elk (Cervus elaphus) to wind-power development  

USGS Publications Warehouse

Wind-power development is occurring throughout North America, but its effects on mammals are largely unexplored. Our objective was to determine response (i.e., home-range, diet quality) of Rocky Mountain elk (Cervus elaphus) to wind-power development in southwestern Oklahoma. Ten elk were radiocollared in an area of wind-power development on 31 March 2003 and were relocated bi-weekly through March 2005. Wind-power construction was initiated on 1 June 2003 and was completed by December 2003 with 45 active turbines. The largest composite home range sizes (>80 km2) occurred April-June and September, regardless of the status of wind-power facility development. The smallest home range sizes (<50 km2) typically occurred in October-February when elk aggregated to forage on winter wheat. No elk left the study site during the study and elk freely crossed the gravel roads used to access the wind-power facility. Carbon and nitrogen isotopes and percent nitrogen in feces suggested that wind-power development did not affect nutrition of elk during construction. Although disturbance and loss of some grassland habitat was apparent, elk were not adversely affected by wind-power development as determined by home range and dietary quality.

Walter, W. D.; Leslie, Jr. , D. M.; Jenks, J. A.

2006-01-01

307

Factors driving wind power development in the United States  

SciTech Connect

In the United States, there has been substantial recent growth in wind energy generating capacity, with growth averaging 24 percent annually during the past five years. About 1,700 MW of wind energy capacity was installed in 2001, while another 410 MW became operational in 2002. This year (2003) shows promise of significant growth with more than 1,500 MW planned. With this growth, an increasing number of states are experiencing investment in wind energy projects. Wind installations currently exist in about half of all U.S. states. This paper explores the key factors at play in the states that have achieved a substantial amount of wind energy investment. Some of the factors that are examined include policy drivers, such as renewable portfolio standards (RPS), federal and state financial incentives, and integrated resource planning; as well as market drivers, such as consumer demand for green power, natural gas price volatility, and wholesale market rules.

Bird, Lori A.; Parsons, Brian; Gagliano, Troy; Brown, Matthew H.; Wiser, Ryan H.; Bolinger, Mark

2003-05-15

308

Development of Large Current High Precision Pulse Power Supply  

NASA Astrophysics Data System (ADS)

JAEA and KEK are jointly constructing a high intensity proton accelerator project J-PARC. Its main accelerator is 3GeV synchrotron. Its injection bump magnets, especially horizontal paint bump magnets, are excited by large pulse currents. Their rated currents are over 10kA and pulse widths are about 1ms. Tracking errors are required to be less than 1%. Multiple connected two-quadrant IGBT choppers are adopted for their power supplies. Their output currents are controlled by feedback control with minor loop voltage control (m-AVR). When output current of a chopper intermits at small current, its output voltage rises up and current control becomes difficult. In this paper response of m-AVR and output voltage characteristics at current intermittent region are studied and an improved control scheme is proposed. The performance is confirmed by a test.

Takayanagi, Tomohiro; Koseki, Shoichiro; Kubo, Hiroshi; Katoh, Shuji; Ogawa, Shinichi

309

Intellectual Property: a powerful tool to develop biotech research.  

PubMed

Today biotechnology is perhaps the most important technology field because of the strong health and food implications. However, due to the nature of said technology, there is the need of a huge amount of investments to sustain the experimentation costs. Consequently, investors aim to safeguard as much as possible their investments. Intellectual Property, and in particular patents, has been demonstrated to actually constitute a powerful tool to help them. Moreover, patents represent an extremely important means to disclose biotechnology inventions. Patentable biotechnology inventions involve products as nucleotide and amino acid sequences, microorganisms, processes or methods for modifying said products, uses for the manufacture of medicaments, etc. There are several ways to protect inventions, but all follow the three main patentability requirements: novelty, inventive step and industrial application. PMID:21255349

Giugni, Diego; Giugni, Valter

2010-06-01

310

Development of a digital turbine control system in a nuclear power plant  

Microsoft Academic Search

A digital turbine control system (TCS) has been developed for retrofitting an old analog TCS in a nuclear power plant. The\\u000a developed TCS, which controls the speed of a turbine and the power load of a generator, is based on a triple modular redundant\\u000a structure to ensure the system reliability. In addition, a turbine simulator has been developed to verify

In-Kyu Choi; Jong-An Kim; Chang-Ki Jeong; Joo-Hee Woo; Ji-Young Choi; Gihun Son

2009-01-01

311

Power.  

ERIC Educational Resources Information Center

|This issue addresses advantages and disadvantages of having power. Includes Web sites, CD-ROMs and software, videos, books, and additional resources with suggested age levels and disciplines as well as ideas for appropriate related activities. Sidebars discuss the power of the pen, the power of peace, and the power of the media. (LRW)|

Online-Offline, 1999

1999-01-01

312

A Power Consumption Analysis Technique Using UML-Based Design Models in Embedded Software Development  

NASA Astrophysics Data System (ADS)

Although the power consumption of embedded system depends on the operation of hardware devices, software behaviors give great effect to the power consumption because of its functionality and complexity growth. This paper proposes a power consumption estimation technique using design models of software to support energy-efficient embedded software development. Even though code-based power analysis techniques have been proposed, these techniques have demerits that the analysis time is long and feedback is not easy. Our proposed technique makes use of UML behavior models for the power consumption analysis in order to overcome the demerits of code-based analysis. When comparing with the existing code-based analysis, our technique can provide the power analysis result at earlier phase than implementation. Therefore, software engineer can apply our technique to select energy-efficient design decisions in embedded software development process.

Kim, Doo-Hwan; Kim, Jong-Phil; Hong, Jang-Eui

313

Development of a power control system for AUVs probing for underwater mineral resources  

NASA Astrophysics Data System (ADS)

Valuable mineral resources are widely distributed throughout the seabed. autonomous underwater vehicles (AUVs) are preferable to remotely-operated vehicles (ROVs) when probing for such mineral resources as the extensive exploration area makes it difficult to maintain contact with operators. AUVs depend on batteries, so their power consumption should be reduced to extend exploration time. Power for conventional marine instrument systems is incorporated in their waterproof sealing. External intermittent control of this power source until termination of exploration is challenging due to limitations imposed by the underwater environment. Thus, the AUV must have a power control system that can improve performance and maximize use of battery capacity. The authors developed such a power control system with a three-step algorithm. It automatically detects underwater operational states and can limit power, effectively decreasing power consumption by about 15%.

Kim, Young Jin; Kim, Hyung Tae; Cho, Young June; Lee, Kang Won

2009-12-01

314

Materials advances to enhance development of geothermal power  

SciTech Connect

In order to assure the continued development of geothermal resources, many advances in materials technology are required so that high costs resulting from the severe environments encountered during drilling, well completion and energy extraction can be reduced. These needs will become more acute as higher temperature and chemically aggressive fluids are encountered. High priority needs are for lost circulation control and lightweight well completion materials, and tools such as drill pipe protectors, rotating head seals, blow-out preventers, and downhole drill motors. The lack of suitable hydrolytically stable chemical systems that can bond previously developed elastomers to metal reinforcement is a critical but as yet unaddressed impediment to the development of these tools. In addition, the availability of low cost corrosion and scale-resistant tubular lining materials would greatly enhance transport and energy extraction processes utilizing hypersaline brines. Work to address these materials needs is underway at Brookhaven National Laboratory (BNL), and recent accomplishments are summarized in the paper. 15 refs.

Kukacka, L.E.

1989-03-01

315

Climate impacts on hydro-power development in China  

NASA Astrophysics Data System (ADS)

Viewing hydropower as a clean energy source and an important part of overall energy strategy in the years ahead, China has put priority on hydroelectric projects as part of its sustainable development strategy to reduce pollution as well as CO2 emission resulting from burning coal. Although China's hydropower exploitation potential ranks first in the world, its utilization ratio is very low at 24% by comparing with as high as 80% in developed countries. Although the economic importance of hydropower plants cannot be underestimated, their construction also has brought inevitable negative effects on the environment. Moreover, because the efficiency of operating hydropower plants is heavily dependent on precipitation condition which is very sensitive to climate variation and climate change, and the reservoirs built for hydropower plants are also discovered as one of greenhouse gases sources, the climate impact on developing mega-hydropower projects needs to be studied.

Zhou, Meili; Ye, Qian; Liu, Zhihui

2005-09-01

316

Power Systems Development Facility: High Temperature, High Pressure Filtration in Gasification Operation  

Microsoft Academic Search

High temperature, high pressure gas filtration is a fundamental component of several advanced coal-fired power systems. This paper discusses the hot-gas filter vessel operation in coal gasification mode at the Power Systems Development Facility (PSDF). The PSDF, near Wilsonville, Alabama, is funded by the U.S. Department of Energy (DOE), Southern Company, and other industrial participants currently including the Electric Power

R. A. Martin; X. Guan; B. Gardner; H. Hendrix

2002-01-01

317

Development of a high frequency Stirling engine-powered 3 kW(e) generator set  

Microsoft Academic Search

The development of a Stirling engine-powered, 3 kW electric generator set is discussed. The generator set contains two high-frequency (115 Hz), helium-charged, free-piston Stirling engines mounted in an opposed configuration and heated by gas-fired sodium heat pipe, a power conditioner, an adaptive load controller, and the engine cooling system. The maximum power from a single engine, at this stage of

D. M. Berchowitz; D. Shade; A. Karandikar

1989-01-01

318

Wind Power Projects in India and Clean Development Mechanism (CDM) Approach  

Microsoft Academic Search

\\u000a This chapter aims to discuss the necessity of increasing wind power plants with respect to the increasing power demand and\\u000a the availability of the wind resource in India. The maximum available wind potential for power production is higher than the\\u000a present installed capacities. This creates a chance for further sustainable development. This chapter is an original research\\u000a work carried out

Shrinivas Tukdeo; Satyanarayana Narra

319

250 degrees C SiC High Density Power Module Development  

SciTech Connect

Taking full advantage of SiC devices, a team from Oak Ridge National Laboratory, the University of Tennessee and Virginia Polytechnic Institute and State University have designed, developed, and tested a phase-leg power module based on a high temperature wirebond package. Details of the layout, gate drive, and cooling system designs are described. Continuous power tests confirmed that our design process produced a high density power module that operated successfully at high junction temperatures.

Ning, Puqi [ORNL; Wang, Fei [ORNL; Ngo, Khai [Virginia Polytechnic Institute and State University (Virginia Tech)

2011-01-01

320

Geothermal power development in Hawaii. Volume I. Review and analysis  

SciTech Connect

The history of geothermal exploration in Hawaii is reviewed briefly. The nature and occurrences of geothermal resources are presented island by island. An overview of geothermal markets is presented. Other topies covered are: potential markets of the identified geothermal areas, well drilling technology, hydrothermal fluid transport, overland and submarine electrical transmission, community aspects of geothermal development, legal and policy issues associated with mineral and land ownership, logistics and infrastructure, legislation and permitting, land use controls, Regulation 8, Public Utilities Commission, political climate and environment, state plans, county plans, geothermal development risks, and business planning guidelines.

Not Available

1982-06-01

321

Advanced on-site power plant development technology program  

NASA Astrophysics Data System (ADS)

A 30-cell stack was tested for 7200 hours. At 6000 hours the stack was successfully refilled with acid with no loss of performance. A second stack containing the advanced Configuration B cell package was fabricated and assembled for testing in 1985. A 200-kW brassboard inverter was successfully evaluated, verifying the design of the two-bridge ASCR circuit design. A fuel processing catalyst train was tested for 2000 hours verifying the catalyst for use in a 200-kW development reformer. The development reformer was fabricated for evaluation in 1985. The initial test plan was prepared for a 200-kW verification test article.

Kemp, F. S.

1985-02-01

322

Development of Improved Burnable Poisons for Commercial Nuclear Power Reactors  

SciTech Connect

Burnable poisons are used in nuclear reactors to produce a more level distribution of power in the reactor core and to reduce to necessity for a large control system. An ideal burnable poison would burn at the same rate as the fuel. In this study, separation of neutron-absorbing isotopes was investigated in order to eliminate isotopes that remain as absorbers at the end of fuel life, thus reducing useful fuel life. The isotopes Gd-157, Dy-164, and Er-167 were found to have desirable properties. These isotopes were separated from naturally occurring elements by means of plasma separation to evaluate feasibility and cost. It was found that pure Gd-157 could save approximately $6 million at the end of four years. However, the cost of separation, using the existing facility, made separation cost- ineffective. Using a magnet with three times the field strength is expected to reduce the cost by a factor of ten, making isotopically separated burnable poisons a favorable method of increasing fuel life in commercial reactors, in particular Generation-IV reactors. The project also investigated various burnable poison configurations, and studied incorporation of metallic burnable poisons into fuel cladding.

M. L. Grossbeck J-P.A. Renier Tim Bigelow

2003-09-30

323

Predicting premature mortality from new power plant development in Virginia.  

PubMed

The authors estimated the number of premature deaths from particulate matter less than 2.5 microm (PM2.5) that would result from making 29 proposed fossil fuel power plants in Virginia operational. We used a U.S. Environmental Protection Agency air quality model (Climatological Regional Dispersion model) to calculate changes in ambient concentrations of PM2.5 and Cox proportional hazard modeling to calculate the resulting premature mortality. The model predicted that if all 29 plants were operational, PM2.5 concentrations would rise in 271 counties across 19 states 5 and increased average annual PM2.5 concentrations would result in a rate of 17 deaths per 37,900,026 people aged 30 yr and older (0.45 deaths per million, 95% confidence interval = 0.31, 0.59) per year by the end of 2004, increasing thereafter. Over a 6 yr period, 104 cumulative excess deaths would occur due to operations of these proposed plants. The authors recommend that precautionary principles be considered when policy decisions related to energy production from fossil fuels are made. PMID:16425664

Hermann, Richard P; Divita, Frank; Lanier, Jack O

2004-10-01

324

Driver development of IFE power plant in Japan Collaborative process with industry and industrial applications  

NASA Astrophysics Data System (ADS)

The typical specifications of the laser driver for a commercial IFE power plant are (1) total energy (MJ/pulse) with a tailored 20-40 ns pulse, (2) repetition operation (˜ 10 Hz), (3) efficiency (˜ 10%) with enough robustness and low cost. The key elements of the DPSSL driver technology are under development with HALNA. The HALNA 10 (High Average-power Laser for Nuclear-fusion Application) demonstrated 10 J × 10 Hz operation and the HALNA 100 (100 J × 10 Hz) is now under construction. By using the high average power and high intensity lasers, new industrial applications are being proceeded. The collaborative process for the development of high power laser with industry and for the industrial applications is effective and essential in the development of the laser driver for IFE power plant.

Nakai, S.; Yamanaka, M.; Kitagawa, Y.; Fujita, K.; Heya, M.; Mima, K.; Izawa, Y.; Nakatsuka, M.; Murakami, M.; Ueda, K.; Sasaki, T.; Mori, Y.; Kanabe, T.; Hiruma, T.; Kan, H.; Kawashima, T.

2006-06-01

325

The power of the 3? UTR: translational control and development  

Microsoft Academic Search

Many crucial decisions, such as the location and timing of cell division, cell-fate determination, and embryonic axes establishment, are made in the early embryo, a time in development when there is often little or no transcription. For this reason, the control of variation in gene expression in the early embryo often relies on post-transcriptional control of maternal genes. Although the

Scott Kuersten; Elizabeth B. Goodwin

2003-01-01

326

Development Status of the NSTAR Ion Propulsion System Power Processor.  

National Technical Information Service (NTIS)

A 0.5-2.3 kW xenon ion propulsion system is presently being developed under the NASA Solar Electric Propulsion Technology Application Readiness (NSTAR) program. This propulsion system includes a 30 cm diameter xenon ion thruster, a Digital Control Interfa...

J. A. Hamley L. R. Pinero V. K. Rawlin J. R. Miller K. C. Cartier

1995-01-01

327

Development of Induction Machines in Wind Power Technology  

Microsoft Academic Search

This paper gives an overview of the development of the induction machine as a generator for wind turbines from the middle of the 20th century up to now. After a short history chapter the different energy conversion concepts are presented. At first a squirrel cage machine is direct coupled to the grid (Danish concept). To adjust the machine speed the

Stefan Soter; R. Wegener

2007-01-01

328

Materials Advances to Enhance Development of Geothermal Power  

Microsoft Academic Search

In order to assure the continued development of geothermal resources, many advances in materials technology are required so that high costs resulting from the severe environments encountered during drilling, well completion and energy extraction can be reduced. These needs will become more acute as higher temperature and chemically aggressive fluids are encountered. High priority needs are for lost circulation control

Kukacka; Lawrence E

1989-01-01

329

Materials advances to enhance development of geothermal power  

Microsoft Academic Search

In order to assure the continued development of geothermal resources, many advances in materials technology are required so that high costs resulting from the severe environments encountered during drilling, well completion and energy extraction can be reduced. These needs will become more acute as higher temperature and chemically aggressive fluids are encountered. High priority needs are for lost circulation control

Kukacka

1989-01-01

330

‘The power of mantras’: postcoloniality, education and development  

Microsoft Academic Search

The discourse of development or modernization and of ‘national integration’ or ‘nation?building’ in India is inseparable from issues surrounding education and culture and their incorporation in definitions forged during colonialism. In this article I look primarily at the Kothari Commission Report (KCR) of 1964–66 and the New Policy on Education (NPE) proposals of 1986. These two documents, between them, chart

Prem Poddar

2006-01-01

331

Development of high purity large forgings for nuclear power plants  

Microsoft Academic Search

The recent increase in the size of energy plants has been supported by the development of manufacturing technology for high purity large forgings for the key components of the plant. To assure the reliability and performance of the large forgings, refining technology to make high purity steels, casting technology for gigantic ingots, forging technology to homogenize the material and consolidate

Yasuhiko Tanaka; Ikuo Sato

2011-01-01

332

Developing Responsible Learners: The Power of Intentional Mental Processing  

Microsoft Academic Search

Most college students do not habitually do the deep thinking that will allow them to take their learning beyond the acquisition of knowledge. This paper examines the findings from a phenomenological study of eight students involved in an interdisciplinary community focused on developing responsible, life-long learners. Students identified both the myriad ways the learning opportunities had been structured to engage

Janice A. Wiersema; Barbara L. Licklider

2007-01-01

333

Tourism planning and power within micropolitan community development  

Microsoft Academic Search

The purpose of this research is to investigate the community planning processes associated with the development of a new and iconic attraction in a micropolitan community. The four sources of evidence in the case study research were communication with community leaders, planning documents, newspaper articles, and observations. Two hypotheses were formulated with the first phrased as planning for a proposed

William L. Obenour; Nelson Cooper

2010-01-01

334

The need for the development of a child led assessment tool for powered mobility users  

Microsoft Academic Search

Research based evidence for provision of powered mobility to disabled infants and children is a growing area of concern for the child, their families and the clinicians involved with the assessment and prescription of equipment. A review of the main literature on powered mobility studies with children identifies gaps which need to be addressed in terms of normal development, play

Josephine Durkin

2002-01-01

335

Development of a quiet Stirling cycle multi-fuel engine for electric power generation  

Microsoft Academic Search

The work described in this report summarizes a six-month study to develop a lightweight, tactical electric power plant with a low level of aural, I. R., and visual detectability, based on a Stirling engine. The conceptual design presented was analyzed and predicted to have power output qualities exceeding those specified by the Army for tactical generators. The unit promises to

J. E. Mercer; S. G. Emigh; P. Riggle; O. L. Tremoulet; M. A. White

1982-01-01

336

A software for simulation and controller development for high frequency high voltage power supplies  

Microsoft Academic Search

This paper describes software developed for the simulation of high voltage (up to 125 kV), high frequency power supply for radiology equipment. The main components of the power supply are an AC-DC conversion stage and a high frequency inverter feeding a resonant load. The resonant load is the impedance reflected to the inverter side of the high voltage, high frequency

H. Biilent Ertan; Tolga Camlikaya; Okan Demirel; Cosku Kasnakoglu

2000-01-01

337

AE analysis in developing the Hot Fractured Rock geothermal power in Australia  

Microsoft Academic Search

The hot fractured rock (HFR) geothermal power is being developed in Cooper Basin, South Australia since 2002. HFR geothermal power is one of natural energy acquiring systems, in which water is pumped into hot, crystalline rock via an injection well, becomes superheated as it flows through open joints in the hot rock reservoir, and is returned through production wells. At

Y. Aoyagi; H. Kaieda; H. Asanuma; D. Wyborn

2004-01-01

338

Feasibility determination of low-head hydroelectric power development at existing sites. Final report  

Microsoft Academic Search

This report contains the feasibility study, economic analysis, and information relevant to reactivation of the dam in Bethelehem, NH. It outlines a plan of development which calls for sale of the power to a local utility for the first few years of the project and then predominately on-site use of the power in an innovative plan for controlled-environment agriculture. The

Polonsky

1979-01-01

339

Development of fast breeder reactor fuel reprocessing technology at the Power Reactor and Nuclear Fuel Development Corporation.  

National Technical Information Service (NTIS)

For the past two decades, a broad range of research & development (R&D) programs to establish fast breeder reactor (FBR) system and its associated fuel cycle technology have been pursued by the Power Reactor and Nuclear Fuel Development Corporation (PNC)....

T. Kawata H. Takeda A. Togashi S. Hayashi J. G. Stradley

1991-01-01

340

Aluminum-air power cell research and development progress report  

Microsoft Academic Search

The wedge-shaped cell design, of the aluminum-air battery being developed, is mechanically simple and capable of full anode utilization and rapid full or partial recharge. To maintain constant interelectrode separation and to collect anodic current, the cell uses tin-coated copper tracks mounted on removable cassettes. Under gravity feed, slabs of aluminum enter the cell at a continuous and constant rate

1984-01-01

341

Aluminum-air power cell research and development. Progress report  

Microsoft Academic Search

An aluminum-air battery is under development with the objective of providing an electric vehicle with the range, acceleration and rapid refueling capability of common automobiles. From tested refuelable cell designs, a wedge-shaped cell was chosen for mechanical simplicity and for its capability of full anode utilization and rapid partial- or full-recharge. The cell uses tin-plated copper tracks to maintain a

1984-01-01

342

Aluminum-air power cell research and development  

Microsoft Academic Search

An aluminum-air battery is under development with the objective of providing an electric vehicle with the range, acceleration and rapid refueling capability of common automobiles. From tested refuelable cell designs, a wedge-shaped cell was chosen for mechanical simplicity and for its capability of full anode utilization and rapid partial- or full-recharge. The cell uses tin-plated copper tracks to maintain a

J. F. Cooper

1984-01-01

343

Battery power comparison to charge medical devices in developing countries  

Microsoft Academic Search

Many people in developing countries cannot afford or rely on certain modes of electricity. We establish the reasonability of relying on lead-acid batteries, 9 V alkaline batteries, and lithium-ion batteries for charging low-voltage medical equipment. Based on the research and tests we conducted, we determined that using these battery types to charge medical devices truly is a reasonable solution.

Alesia M. Casanova; Andrew S. Bray; Taylor A. Powers; Amit J. Nimunkar; John G. Webster

2009-01-01

344

Changing the view of wind power development: More than “bricolage”  

Microsoft Academic Search

Understanding innovation depends at root on good qualitative descriptions. This paper re-assesses the role of “bricolage”, and the extent of science-based R&D and experience-based learning, in the development of the Danish wind turbine system. It argues that the competition between these two opposed frames of reference was never conclusively settled, but involved a reassertion of science-based R&D, which was ultimately

Chris Hendry; Paul Harborne

2011-01-01

345

Interview Timing Data: Simple yet Powerful Survey Instrument Development Tools  

Microsoft Academic Search

Timing data in a computer-assisted telephone interview (CATI)\\/Web survey is not difficult to collect and is quite useful for subsequent questionnaire development. Time stamp information for predictable interview events (such as login\\/logout, form submission, interview completion) can be collected in several ways. Each provides different insights into the interview experience, and when used together, they present instrument designers with tools

Ruth Heuer; John Doherty; Eric Zwieg

346

Development of a pulse-arc welding power supply  

NASA Astrophysics Data System (ADS)

A new pulse-arc (PA) weld system similar to gas tungsten arc welding (GTAW) was designed and developed. It replaces a previous design which has been in use by Allied-Signal Inc., Kansas City Division (KCD), for about 20 years. The new design incorporates state-of-the-art electronics and modular design. The system was proved in with the fabrication of a laboratory prototype and one made-to-drawing unit.

Hollar, D. L.

1992-02-01

347

Battery power comparison to charge medical devices in developing countries.  

PubMed

Many people in developing countries cannot afford or rely on certain modes of electricity. We establish the reasonability of relying on lead-acid batteries, 9 V alkaline batteries, and lithium-ion batteries for charging low-voltage medical equipment. Based on the research and tests we conducted, we determined that using these battery types to charge medical devices truly is a reasonable solution. PMID:19964250

Casanova, Alesia M; Bray, Andrew S; Powers, Taylor A; Nimunkar, Amit J; Webster, John G

2009-01-01

348

Development of sealed-type lead-acid battery for solar power system  

SciTech Connect

Solar power generation has been studied as one of the oil-alternative energies. The solar cell used for power generation only generates when the sun shines, and it cannot store the electric power generated. Solar power systems for practical application use storage batteries, so that electricity can be released around the clock. Storage batteries used for this purpose are mainly of lead-acid composition. This article describes one company's effort to develop a low cost battery better suited to solar applications that need higher reliabilities and less maintenance. Discussion covers design and operating characteristics. 6 figs., 3 tabs.

Sato, H.

1989-11-01

349

ICRF array module development and optimization for high power density  

SciTech Connect

This report describes the analysis and optimization of the proposed International Thermonuclear Experimental Reactor (ITER) Antenna Array for the ion cyclotron range of frequencies (ICRF). The objectives of this effort were to: (1) minimize the applied radiofrequency rf voltages occurring in vacuum by proper layout and shape of components, limit the component`s surface/volumes where the rf voltage is high; (2) study the effects of magnetic insulation, as applied to the current design; (3) provide electrical characteristics of the antenna for the development and analysis of tuning, arc detection/suppression, and systems for discriminating between arcs and edge-localized modes (ELMs); (4) maintain close interface with mechanical design.

Ryan, P.M.; Swain, D.W.

1997-02-01

350

Harnessing the power of the endosome to regulate neural development  

PubMed Central

Endocytosis and endosomal trafficking play a multitude of roles in cellular function beyond regulating entry of essential nutrients. In this review, we discuss the cell biological principles of endosomal trafficking, the neuronal adaptations to endosomal organization, and the role of endosomal trafficking in neural development. In particular, we consider how cell fate decisions, polarity, migration, and axon outgrowth and guidance are influenced by five endosomal tricks: dynamic modulation of receptor levels by endocytosis and recycling, cargo-specific responses via cargo-specific endocytic regulators, cell type-specific endocytic regulation, ligand-specific endocytic regulation, and endosomal regulation of ligand processing and trafficking.

Yap, Chan Choo; Winckler, Bettina

2012-01-01

351

Development of mos thyristor technological processes for functional integration of new power devices.  

National Technical Information Service (NTIS)

The development of MOS thyristor technological processes for integration of the switching function for high voltage power applications in industrial supply networks, is studied. A MOS-gated optically triggered thyristor is presented, which includes a MOS ...

R. Berriane

1997-01-01

352

Possibilities for the Use of Wind Power Stations in Developing Countries. Part 1.  

National Technical Information Service (NTIS)

Information is presented concerning requirements of wind power plants for developing countries; state-of-the-art for wind turbines; basic design principles; wind energy statistics; energy conversion, matching supply and demand; safety and maintenance; con...

H. Bankwitz A. Fritzsche D. Welte H. Doerner J. P. Molly

1977-01-01

353

Development of Microbial and Enzymatic Fuel Cells for Bio-Inspired Power Sources.  

National Technical Information Service (NTIS)

This report is based on some of the revolutionary concepts described in the Road Map on 'Bioinspired Power Systems' within the AFRL/RW Campus Challenge II. Development of biofuel cell concepts integrated with fuel regeneration and energy storage capabilit...

F. Dogan S. Minteer

2009-01-01

354

Sizzling Hand Prosthesis. On the Design and Development of a Pneumatically Powered Hand Prosthesis for Children.  

National Technical Information Service (NTIS)

The thesis contains five chapters, which describe the design of an innovative pneumatically powered, hand prosthesis. Chapter 1, Introduction, starts with a definition of the notion prosthesis. After presenting a very brief review of the development of up...

D. H. Plettenburg

2002-01-01

355

Development of Advanced Radioisotope Power Systems for NASA's Future Science Missions  

NASA Astrophysics Data System (ADS)

This presentation will provide an overview of NASA's current efforts on development of advanced radioisotope power systems (RPS) for future science missions. The current efforts include development of flight qualified Multimission Radioisotope Thermoelectric Generator (MMRTG) and Stirling Radioisotope Generator (SRG) systems with nominal 100 watts power level and capability to operate in both deep space and planetary environments. In addition, advanced technology development efforts are being conducted to increase the specific power of both RTG and SRG systems to enable future science missions. The efforts also include new technologies that have the potential to provide significant increases in specific power of RPS system. A notional RPS technology development roadmap will be presented and various potential mission opportunities identified.

Misra, A. K.

2005-12-01

356

Aluminum-air power cell research and development  

NASA Astrophysics Data System (ADS)

An aluminum-air battery is under development with the objective of providing an electric vehicle with the range, acceleration and rapid refueling capability of common automobiles. From tested refuelable cell designs, a wedge-shaped cell was chosen for mechanical simplicity and for its capability of full anode utilization and rapid partial- or full-recharge. The cell uses tin-plated copper tracks to maintain a constant interelectrode separation and to collect anodic current. Rectangular slabs of aluminum enter the cell under gravity feed and gradually assume the wedge shape during dissolution. The feed is constant and continuous and tin/aluminum junction losses are 7 mV at 2 kA/m(2). A second generation wedge cell was developed which incorporates air- and electrolyte-manifolding into individually-replaceable air-cathode cassettes. A prototype wedge cell using replaceable cassettes was operated simultaneously with a crystallizer, which stabilized aluminate concentration and produced a granular aluminum-trihydroxide reaction product. Electrolyte was circulated between cell and fluidized-bed crystallizer, and particles of sizes greater than 0.015 mm were retained within the crystallizer using a hydrocyclone.

Cooper, J. F.

1984-02-01

357

Development and optimization of a stove-powered thermoelectric generator  

NASA Astrophysics Data System (ADS)

Almost a third of the world's population still lacks access to electricity. Most of these people use biomass stoves for cooking which produce significant amounts of wasted thermal energy, but no electricity. Less than 1% of this energy in the form of electricity would be adequate for basic tasks such as lighting and communications. However, an affordable and reliable means of accomplishing this is currently nonexistent. The goal of this work is to develop a thermoelectric generator to convert a small amount of wasted heat into electricity. Although this concept has been around for decades, previous attempts have failed due to insufficient analysis of the system as a whole, leading to ineffective and costly designs. In this work, a complete design process is undertaken including concept generation, prototype testing, field testing, and redesign/optimization. Detailed component models are constructed and integrated to create a full system model. The model encompasses the stove operation, thermoelectric module, heat sinks, charging system and battery. A 3000 cycle endurance test was also conducted to evaluate the effects of operating temperature, module quality, and thermal interface quality on the generator's reliability, lifetime and cost effectiveness. The results from this testing are integrated into the system model to determine the lowest system cost in $/Watt over a five year period. Through this work the concept of a stove-based thermoelectric generator is shown to be technologically and economically feasible. In addition, a methodology is developed for optimizing the system for specific regional stove usage habits.

Mastbergen, Dan

358

A Comparative Analysis of Community Wind Power DevelopmentModels  

SciTech Connect

For years, farmers in the United States have looked with envy on their European counterparts ability to profitably farm the wind through ownership of distributed, utility-scale wind projects. Only within the past few years, however, has farmer- or community-owned windpower development become a reality in the United States. The primary hurdle to this type of development in the United States has been devising and implementing suitable business and legal structures that enable such projects to take advantage of tax-based federal incentives for windpower. This article discusses the limitations of such incentives in supporting farmer- or community-owned wind projects, describes four ownership structures that potentially overcome such limitations, and finally conducts comparative financial analysis on those four structures, using as an example a hypothetical 1.5 MW farmer-owned project located in the state of Oregon. We find that material differences in the competitiveness of each structure do exist, but that choosing the best structure for a given project will largely depend on the conditions at hand; e.g., the ability of the farmer(s) to utilize tax credits, preference for individual versus cooperative ownership, and the state and utility service territory in which the project will be located.

Bolinger, Mark; Wiser, Ryan; Wind, Tom; Juhl, Dan; Grace, Robert; West, Peter

2005-05-20

359

DEVELOPMENT AND ASSESSMENT OF COATINGS FOR FUTURE POWER GENERATION TURBINES  

SciTech Connect

The NETL-Regional University Alliance (RUA) continues to advance technology development critical to turbine manufacturer efforts for achieving DOE Fossil Energy (FE's) Advanced Turbine Program Goals. In conjunction with NETL, Coatings for Industry (CFI), the University of Pittsburgh, NASA GRC, and Corrosion Control Inc., efforts have been focused on development of composite thermal barrier coating (TBC) architectures that consist of an extreme temperature coating, a commercially applied 7-8 YSZ TBC, a reduced cost bond coat, and a diffusion barrier coating that are applied to nickel-based superalloys or single crystal airfoil substrate materials for use at temperatures >1450 C (> 2640 F). Additionally, construction of a unique, high temperature ({approx}1100 C; {approx}2010 F), bench-scale, micro-indentation, nondestructive (NDE) test facility at West Virginia University (WVU) was completed to experimentally address in-situ changes in TBC stiffness during extended cyclic oxidation exposure of coated single crystal coupons in air or steam containing environments. The efforts and technical accomplishments in these areas are presented in the following sections of this paper.

Alvin, Maryanne; Klotz, K.; McMordie, B.; Gleeson, B.; Zhu, D.; Warnes, B.; Kang, B.; Tannenbaum, J.

2012-01-01

360

Integrating planning and design optimization for thermal power generation in developing economies: Designs for Vietnam  

Microsoft Academic Search

In the twenty first century, global warming and climate change have become environmental issues worldwide. There is a need to reduce greenhouse gas emissions from thermal power plants through improved efficiency. This need is shared by both developed and developing countries. It is particularly important in rapidly developing economies (for example, Vietnam, South Korea, and China) where there is very

John Dinh Chuong Pham

2005-01-01

361

HIGH POWER DENSITY DEVELOPMENT PROJECT. Quarterly Progress Report No. 11, October-December 1962  

Microsoft Academic Search

No irradiation accrued on the high power density development fuels ; during the quarter. A summary of irradiation data and status information is ; included. Fabrication of 484 swaged pellet fuel rods and 484 swaged powder fuel ; rods for consumers development fuel assemblies was completed. Development of a ; new fuel rod ring-type spacer is reported. Data on fabrication

Holladay; R. L. comp

1963-01-01

362

Develop and test fuel cell powered on site integrated total energy sysems: Phase 3: Full-scale power plant development  

Microsoft Academic Search

A 25-cell stack of the 13 inch x 23 inch cell size (about 4kW) remains on test after 8300 hours, using simulated reformate fuel. A similar stack was previously shut down after 7000 hours on load. These tests have been carried out for the purpose of assessing the durability of fuel cell stack components developed through the end of 1983.

A. Kaufman; B. Olson; S. Pudick; C. L. Wang; J. Werth; J. A. Whelan

1986-01-01

363

BBU code development for high-power microwave generators  

NASA Astrophysics Data System (ADS)

We are developing a two-dimensional, time-dependent computer code for the simulation of transverse instabilities in support of relativistic klystron-two beam accelerator research at LLNL. The code addresses transient effects as well as both cumulative and regenerative beam breakup modes. Although designed specifically for the transport of high current (kA) beams through traveling-wave structures, it is applicable to devices consisting of multiple combinations of standing-wave, traveling-wave, and induction accelerator structures. In this paper we compare code simulations to analytical solutions for the case where there is no RF coupling between cavities, to theoretical scaling parameters for coupled cavity structures, and to experimental data involving beam breakup in the two traveling-wave output structure of our microwave generator.

Houck, T. L.; Westenskow, G. A.; Yu, S. S.

1992-08-01

364

BBU code development for high-power microwave generators  

SciTech Connect

We are developing a two-dimensional, time-dependent computer code for the simulation of transverse instabilities in support of relativistic klystron-two beam accelerator research at LLNL. The code addresses transient effects as well as both cumulative and regenerative beam breakup modes. Although designed specifically for the transport of high current (kA) beams through traveling-wave structures, it is applicable to devices consisting of multiple combinations of standing-wave, traveling-wave, and induction accelerator structures. In this paper we compare code simulations to analytical solutions for the case where there is no rf coupling between cavities, to theoretical scaling parameters for coupled cavity structures, and to experimental data involving beam breakup in the two traveling-wave output structure of our microwave generator.

Houck, T.L.; Westenskow, G.A. [Lawrence Livermore National Lab., CA (United States); Yu, S.S. [Lawrence Berkeley Lab., CA (United States)

1992-08-01

365

Development of REBCO superconducting power transformers in Japan  

NASA Astrophysics Data System (ADS)

In Japan we started a national project to develop a 66/6.9 kV-20 MVA transformer with REBCO superconducting tapes in 2006. This paper gives an overview of progress of the development of superconducting transformers in Japan and also describes the fundamental technologies studied before now to realize a 66/6.9 kV-20 MVA transformer as follows. To reduce the ac loss in REBCO superconducting thin tapes, authors proposed a new method different from the conventional technique of reducing the ac loss in superconducting multifilamentary wires. It consists of scribing process into a multifilamentary structure by laser or chemical etching, and a special winding process. Making a multilayered solenoidal coil with laser-scribed REBCO tapes, we verified the ac loss reduction in proportion to a filament width even in coil configuration. In addition, to realize a current capacity more than the rated secondary current of 2.4 kA, we first investigated the workability of REBCO tapes in the actual winding process with forming a transposed parallel conductor, where REBCO tapes were bent edgewise at transposing points. Making a test coil of a 24-strand parallel conductor, we verified no degradation of the critical current and nearly uniform current distribution among the tapes. The result suggests the applicability of the method of enhancing the current capacity by forming a parallel conductor with REBCO tapes. Further, to realize the dielectric strength regulated for the Japanese standards, i.e. lightning impulse withstand level of 350 kV and excess ac voltage of 140 kV, we made test coils and carried out dielectric breakdown tests. As a result, we got hold of the required insulation distance at the important points from the viewpoint of insulation design.

Iwakuma, M.; Hayashi, H.; Okamoto, H.; Tomioka, A.; Konno, M.; Saito, T.; Iijima, Y.; Suzuki, Y.; Yoshida, S.; Yamada, Y.; Izumi, T.; Shiohara, Y.

2009-10-01

366

Aluminum-air power cell research and development  

NASA Astrophysics Data System (ADS)

The wedge-shaped design, of the aluminum-air battery being developed, is mechanically simple and capable of full anode utilization and rapid full or partial recharge. To maintain constant interelectrode separation and to collect anodic current, the cell uses tin-coated copper tracks mounted on removable cassettes. Under gravity feed, slabs of aluminum enter the cell at a continuous and constant rate and gradually assume the wedge shape as they dissolve. Voltage losses at this tin-aluminum junction are 7 mV at 2 kA/m(2). A second-generation wedge cell incorporates air and electrolyte manifolding into individually replaceable air-cathode cassettes. Prototype wedge cells of one design were operated simultaneously with a fluidized-bed crystallizer, which stabilized aluminate concentration and produced a granular aluminum-trihydroxide reaction product. Electrolyte was circulated between the cell and crystallizer, and a hydrocyclone was used to retain particles larger than 0.015 mm within the crystallizer. Air electrodes were tested over simulated vehicle drive systems that include a standby phase in cold, supersaturated electrolyte.

Cooper, J. F.

1984-12-01

367

International and Domestic Development Trends of Electromagnetic Transient Analysis Programs for Power Systems  

NASA Astrophysics Data System (ADS)

Nowadays, there is quite high demand for electromagnetic transient (EMT) analysis programs and real-time simulators for power systems. In addition to the conventional demand such as overvoltage, over-current and oscillation simulations, the new demand that includes simulations of power-electronics circuits and power quality is increasing. With this background, development groups of EMT programs and real-time simulators have made progress in terms of computational performance and user experience. In Japan, Central Research Institute of Electric Power Industry has newly developed an EMT analysis program called XTAP (eXpandable Transient Analysis Program). This article overviews these international and domestic development trends of EMT analysis programs and real-time simulators.

Noda, Taku

368

Development of current injection based three phase unbalanced continuation power flow for distribution system  

NASA Astrophysics Data System (ADS)

Voltage stability studies (VSS) of the electric network is a crucial factor to make the system operate in stable region and to prevent power blackouts. There are several commercial tools available for VSS of electric transmission systems (TS) but not many for distribution systems (DS). With increasing penetration of distributed renewable generations and meshed network within DS, shipboard power system (SPS) and microgrid, these VSS tools need to be extended for DS. Due to inherent characteristic like high R/X ratio, three phase and unbalanced operation, DS or SPS requires different mathematical approach than TS. Unbalanced three phase power flow and continuation power flow tools were developed using current injection and corrector predictor methods in this work for VSS. Maximum loading point for given DS or SPS can be computed using developed tools to guide required preventive and corrective actions. Developed tool was tested and validated for several different test cases.

Toppo, Shilpa

369

Analysis of critical development issues towards advanced tokamak power plant CREST  

NASA Astrophysics Data System (ADS)

A development scenario of the tokamak reactor in three stages (i.e. the experimental reactor ITER, a demonstration reactor and a commercial reactor) has been recently discussed. In order to construct a feasible development strategy, it is necessary to evaluate which component of reactor technologies and to what extent should be developed. From the viewpoint of the future electric supplier, we have proposed the conceptual design of a commercial power plant, compact reversed shear tokamak (CREST), and a demonstration power plant, Demo-CREST. On the other hand, the project of the experimental reactor ITER is underway, and its experimental plan and R&D activities are almost completed. Hence, it is most important and reasonable to investigate the demonstration power plant on the track of ITER in order to show a specific development scenario of the tokamak reactor. In this report, we discuss the engineering aspect in the Demo-CREST design and analyse the critical development issues towards an advanced tokamak CREST. The power flow and power plant system for Demo-CREST are investigated for improvement in the thermal efficiency of a single device, and the development goals for each reactor component and for each development step are quantitatively analysed.

Hiwatari, R.; Okano, K.; Asaoka, Y.; Ogawa, Y.

2007-05-01

370

Innovation on Energy Power Technology (22)Challenge to Development of Expert System stored Knowledge of Expert Power Network Operators  

NASA Astrophysics Data System (ADS)

Do you remember an expert system? I think there are various impressions about the system. For example, some might say “It reminds me of old days”. On the other hand, some might say “It was really troublesome”. About 25 years ago, from late 1980s to the middle of 1990s, when the Showa era was about to change into the Heisei Era, artificial intelligence boomed. Research and development for an expert system which was equipped with expertise and worked as smart as expert, was advanced in various fields. Our company also picked up the system as the new system which covered weak point of conventional computer technology. We started research and development in 1984, and installed an expert system in a SCADA system, which started operating in March 1990 in the Fukuoka Integrated Control Center. In this essay, as an electric power engineer who involved in development at that time, I introduce the situation and travail story about developing an expert system which support restorative actions from the outage and overload condition of power networks.

Sakaguchi, Hideharu

371

100kW Energy Transfer Multiplexer Power Converter Prototype Development Project  

SciTech Connect

Project Final Report for "100kW Energy Transfer Multiplexer Power Converter Prototype Development Project" prepared under DOE grant number DE-FG36-03GO13138. This project relates to the further development and prototype construction/evaluation for the Energy Transfer Multiplexer (ETM) power converter topology concept. The ETM uses a series resonant link to transfer energy from any phase of a multiphase input to any phase of a multiphase output, converting any input voltage and frequency to any output voltage and frequency. The basic form of the ETM converter consists of an eight (8)-switch matrix (six phase power switches and two ground power switches) and a series L-C resonant circuit. Electronic control of the switches allows energy to be transferred in the proper amount from any phase to any other phase. Depending upon the final circuit application, the switches may be either SCRs or IGBTs. The inherent characteristics of the ETM converter include the following: Power processing in either direction (bidirectional); Large voltage gain without the need of low frequency magnetics; High efficiency independent of output load and frequency; Wide bandwidth with fast transient response and; Operation as a current source. The ETM is able to synthesize true sinusoidal waveforms with low harmonic distortions. For a low power PM wind generation system, the ETM has the following characteristics and advantages: It provides voltage gain without the need of low frequency magnetics (DC inductors) and; It has constant high efficiency independent of the load. The ETM converter can be implemented into a PM wind power system with smaller size, reduced weight and lower cost. As a result of our analyses, the ETM offers wind power generation technology for the reduction of the cost and size as well as the increase in performance of low power, low wind speed power generation. This project is the further theoretical/analytical exploration of the ETM converter concept in relationship to PM wind power generator applications in the 100kW and under power range. The theoretical/analytical and bench scale work focuses on simplifying the basic ETM converter topology (in terms of parts count and complexity) for the specific application of the low power PM system. The project goals and objectives were for Spellman HV will develop a 100kW prototype ETM power converter based on paralleled lower ratings converters. The proposed configuration of this prototype is a 100kW rated converter comprised of four (4) 34kW rated modules connected in parallel (the fourth converter is included to demonstrate N+1 fault tolerance). This approach is more viable as there is lower technological risk involved in developing a 34kW-rated converter than a single 100kW unit. The modular system approach should have a lower deployment and service cost over a single unit system, because of the economics of scale (smaller units at a higher volume means lower manufacturing cost) and because of improved serviceability (a non-redundant power system with one failed module will still operate at a lower power level). There is also the added benefit that greater commercial application and acceptance should be achieved by having a modular system available in which fault tolerance (N+1 or 2N) is a feature. This modular approach would allow the output power to be increased by adding more paralleled converters. Thus, the maximum output power of the overall power system is a function of the interconnection medium (the hot swap connection subsystem), rather than the ratings of a single module. The project was implemented with Spellman HV acting as the program management and production assembly and test facility; The Baker Company acting as a technical consultant and resource when required; and dtm Associates acting as the design/development resource for the hardware development of the 100kW ETM converter prototype.

S. Merrill Skeist; Richard H. (Dick) Baker; Anthony G.P. Marini; DOE Project Officer - Keith Bennett

2006-03-21

372

Economic Development Impacts of Wind Power--Case Studies Fact Sheet  

SciTech Connect

OAK-B135 Interest in wind power development is growing as a means of expanding local economies. Such development holds promise as a provider of short-term employment during facility construction and long-term employment from ongoing facility operation and maintenance (O&M). It may also add to the supply of electric power in the area and support some expansion of the local economy through ripple effects resulting from initial increases in jobs and income. These ripple effects stem from subsequent expenditures for goods and services made possible by first-round income from the development, and are expressed in terms of a multiplier. If the local economy offers a wide range of goods and services the resulting multiplier can be substantial--as much as three or four. If not, then much of the initial income will leave the local economy to buy goods and services from elsewhere. Loss of initial income to other locales is referred to as a leakage. While there is a growing body of information about the local impacts of wind power, the economic impacts from existing wind power developments have not been thoroughly and consistently analyzed. Northwest Economic Associates, under contract to the National Wind Coordinating Committee (NWCC), conducted a study and produced a report entitled ''Assessing the Economic Development Impacts of Wind Power.'' The primary objective of the study was to provide examples of appropriate analyses and documentation of economic impacts from wind power development, using case studies of three existing projects in the United States. The findings from the case studies are summarized here; more detail is available in the report, available at NWCC's website http://www.nationalwind.org/. It should be noted that specific results presented apply only to the respective locales studied and are not meant to be representative of wind power in general. However, qualitative findings, discussed below, are likely to be replicated in most areas where wind development occurs.

NWCC Economic Development Work Group

2003-12-17

373

Development of Lithium-ion Battery as Energy Storage for Mobile Power Sources Applications  

NASA Astrophysics Data System (ADS)

In view of the need to protect the global environment and save energy, there has been strong demand for the development of lithium-ion battery technology as a energy storage system, especially for Light Electric Vehicle (LEV) and electric vehicles (EV) applications. The R&D trend in the lithium-ion battery development is toward the high power and energy density, cheaper in price and high safety standard. In our laboratory, the research and development of lithium-ion battery technology was mainly focus to develop high power density performance of cathode material, which is focusing to the Li-metal-oxide system, LiMO2, where M=Co, Ni, Mn and its combination. The nano particle size material, which has irregular particle shape and high specific surface area was successfully synthesized by self propagating combustion technique. As a result the energy density and power density of the synthesized materials are significantly improved. In addition, we also developed variety of sizes of lithium-ion battery prototype, including (i) small size for electronic gadgets such as mobile phone and PDA applications, (ii) medium size for remote control toys and power tools applications and (iii) battery module for high power application such as electric bicycle and electric scooter applications. The detail performance of R&D in advanced materials and prototype development in AMREC, SIRIM Berhad will be discussed in this paper.

Sulaiman, Mohd Ali; Hasan, Hasimah

2009-09-01

374

Development of High Power Vacuum Tubes for Accelerators and Plasma Heating  

NASA Astrophysics Data System (ADS)

High pulsed power magnetrons and klystrons for medical and industrial accelerators, and high CW power klystrons and gyrotrons for plasma heating in tokamak, are being developed at CEERI. S-band 2.0MW pulsed tunable magnetrons of centre frequency 2856MHz and 2998 MHz were developed, and S-band 2.6MW pulsed tunable magnetron is being developed for medical LINAC, and 3MW pulsed tunable magnetron is being developed for industrial accelerator. S-band (2856MHz), 5MW pulsed klystron was developed for particle accelerator, and S-band 6MW pulsed klystron is under development for 10MeV industrial accelerator. 350MHz, 100kW (CW) klystron is being developed for proton accelerator, and C-band 250kW (CW) klystron is being developed for plasma heating. 42GHz, 200kW (CW/Long pulse) gyrotron is under development for plasma heating. Plasma filled tubes are also being developed for switching. 25kV/1kA and 40kV/3kA thyratrons were developed for high voltage high current switching in pulse modulators for magnetrons and klystrons. 25kV/3kA Pseudospark switch of current rise time of 1kA/|a-sec and pulse repetition rate of 500Hz is being developed. Plasma assisted high power microwave device is also being investigated.

Srivastava, Vishnu

2012-11-01

375

Development of Vibration Condition Monitoring System Applying Optical Sensors for Generator Winding Integrity of Power Utilities  

NASA Astrophysics Data System (ADS)

This paper describes the vibration condition monitoring diagnosis system developed for stator and rotor winding integrity assessment of 100MW class gas turbine generator in combined-cycle thermal power plant. High reliability of windings is one of the most essential prerequisite for generators of power utilities. Assessing the condition of stator winding insulation systems requires objective information from condition monitoring system. In-service monitoring is essential if a power plant is following a condition-based maintenance strategy. Generator damages are caused by the high vibration and the power system instability by secondary impacts of an unannounced plant stop and the life of the generator is decreased. The mechanical vibration in generator is induced by both mechanical and magnetic forces. The vibration condition monitoring system is required for the improved savings of operation and maintenance cost in terms of reliability in power plant.

Kim, Yeon Whan; Ho, Ju-Young; Lee, Young Shin

376

110Kv. Transmission Line for Oak Grove Development of Portland Railway, Light and Power Company  

Microsoft Academic Search

This paper covers the design of the 110-kv. transmission line to transmit energy from the new Oak Grove development of the Portland Railway, Light and Power Company to the city of Portland, Oregon, a distance of 54 miles. The company now has three hydroelectric developments aggregating 52,000 kw. supplied from the same general watershed from which energy is transmitted to

H. R. Wakeman; W. H. Lines

1923-01-01

377

Real time test bed development for power system operation, control and cyber security  

Microsoft Academic Search

With ongoing smart grid initiative, there is a considerable need for developing new algorithmic solutions and validating at laboratory level before they can be successfully applied in the power grid. This research work addresses the development of a real time test bed by integrating several hardware's including the Allen Bradley Programmable Logic Controllers (PLC), National Instruments PXI (NI-PXI) controller, Real

Ram Mohan Reddi; Anurag K Srivastava

2010-01-01

378

Economic Development Benefits from Wind Power in Nebraska: A Report for the Nebraska Energy Office.  

National Technical Information Service (NTIS)

This report focuses on the economic development impacts estimated from building and operating 7,800 MW of new wind power in Nebraska. This level of development is on the scale envisioned in the Department of Energy (DOE) report 20% Wind Energy by 2030. A ...

E. Lantz

2008-01-01

379

Development of LNG-Powered Heavy-Duty Trucks in Commercial Hauling  

SciTech Connect

In support of the U.S. Department of Energy's development, deployment, and evaluation of alternative fuels, NREL and the Trucking Research Institute contracted with Detroit Diesel Corporation (DDC) to develop and operate a liquid natural gas fueled tractor powered by a DDC Series 50 prototype natural gas engine. This is the final report on the project.

Detroit Diesel Corporation; Trucking Research Institute

1998-12-03

380

Longer moment arm results in smaller joint moment development, power and work outputs in fast motions  

Microsoft Academic Search

Effects of moment arm length on kinetic outputs of a musculoskeletal system (muscle force development, joint moment development, joint power output and joint work output) were evaluated using computer simulation. A skeletal system of the human ankle joint was constructed: a lower leg segment and a foot segment were connected with a hinge joint. A Hill-type model of the musculus

Akinori Nagano; Taku Komura

2003-01-01

381

Solar Power Generation for ICT and Sustainable Development in Emerging Economies  

ERIC Educational Resources Information Center

|Purpose: The purpose of this paper is to systematically examine and draw attention to the potential benefits of solar power generation for access to and use of information and communication technologies (ICT) aimed at sustainable development in emerging economies. Design/methodology/approach: Electricity plays a crucial role in the development

Paul, Damasen I.; Uhomoibhi, James

2012-01-01

382

Development of Risk Criteria in Nuclear Power Plants - Problems and Solutions  

Microsoft Academic Search

A worldwide need for development of risk criteria exists, which would support risk-informed decision-making. Definition of quantitative risk criteria considering probabilistic safety assessment is presented. It bases on world review and on consideration of a specific situation in Slovenia (one nuclear power plant with one unit). Development of risk criteria is considered separately for permanent and separately for temporary changes

M. ?epin

383

Development of fragility descriptions of equipment for seismic risk assessment of nuclear power plants  

Microsoft Academic Search

Probabilistic risk assessment (PRA) of a nuclear power plant for postulated hazard requires the development of fragility relationships for the plants' safety related equipment. The objective of this paper is to present some general results and conclusions concerning the development of these seismic fragility levels. Participation in fragility-related research and experience gained from the completion of several PRA studies of

G. S. Hardy; R. D. Campbell

1983-01-01

384

Technology and Status of Developments in Harnessing the World's Untapped Wind-Power Resources  

Microsoft Academic Search

This paper presents the views of renowned international authorities on technology and status of developments in harnessing untapped wind-power worldwide. Technology costs have come down hugely and wind is now knocking at the door of coal, nuclear and even gas as the least-cost energy source in developed countries. This paper discusses the latest technology, economics, and untapped resources, assessing the

T. J. HAMMONS

2004-01-01

385

Development of a ceramic receiver for a Brayton cycle solar electric power plant  

Microsoft Academic Search

The successful development of a high temperature open air Brayton cycle system depends upon the development of a ceramic receiver (heat exchanger) in which air at 9-10 atmospheres can be heated to 1000 C. A program to design a solar electric power system utilizing an open air Brayton cycle turbine is described. The heat exchanger consists of silicon carbide tubes

J.-D. Walton; J.-N. Harris

1977-01-01

386

Development of a computer-controlled magnet power supply for KEK PS beam lines  

NASA Astrophysics Data System (ADS)

This paper reports the present status of the development of computer-controlled magnet power supplies (12-phase thyristor converter) for the KEK 12 GeV proton-synchrotron beam lines. We have been developing a power supply in which an 8-bit microcomputer is embedded and which can be interfaced to a host computer. This power supply has the following advantages: (1) the load on the host computer is reduced; (2) maintenance of the power supplies becomes easier; and (3) the current control is carried out by a microcomputer program instead of conventional regulator circuits. At present a current stability of 2×10-4 has been achieved within 10 ms for a 1% change of line voltage. 2.5% of CPU time is used for this current control.

Suzuki, Yoshihiro; Takasaki, Minoru

1990-08-01

387

Development of Analytical Algorithm for the Performance Analysis of Power Train System of an Electric Vehicle  

NASA Astrophysics Data System (ADS)

Power train system design is one of the key R&D areas on the development process of new automobile because an optimum size of engine with adaptable power transmission which can accomplish the design requirement of new vehicle can be obtained through the system design. Especially, for the electric vehicle design, very reliable design algorithm of a power train system is required for the energy efficiency. In this study, an analytical simulation algorithm is developed to estimate driving performance of a designed power train system of an electric. The principal theory of the simulation algorithm is conservation of energy with several analytical and experimental data such as rolling resistance, aerodynamic drag, mechanical efficiency of power transmission etc. From the analytical calculation results, running resistance of a designed vehicle is obtained with the change of operating condition of the vehicle such as inclined angle of road and vehicle speed. Tractive performance of the model vehicle with a given power train system is also calculated at each gear ratio of transmission. Through analysis of these two calculation results: running resistance and tractive performance, the driving performance of a designed electric vehicle is estimated and it will be used to evaluate the adaptability of the designed power train system on the vehicle.

Kim, Chul-Ho; Lee, Kee-Man; Lee, Sang-Heon

388

Recent Developments on High-Power Gyrotrons—Introduction to This Special Issue  

NASA Astrophysics Data System (ADS)

Gyrotrons with output powers of several 100 kW are mainly used as high-power millimeter (mm)-wave sources for electron cyclotron resonance heating (ECRH), electron cyclotron current drive (ECCD), stability control and diagnostics of magnetically confined plasmas for generation of energy by controlled thermonuclear fusion. Other applications include ECR ion sources, materials processing and plasma chemistry, high-resolution Doppler radar, radar ranging and imaging in atmospheric and planetary science, active denial systems, as well as detection of concealed radioactive materials. The present review summarizes the status of recent developments on high-power gyrotrons and introduces this Special Issue on Gyrotrons.

Thumm, Manfred K. A.

2011-03-01

389

Development of a microcontroller-based, photovoltaic maximum power point tracking control system  

Microsoft Academic Search

Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to maximize the photovoltaic array output power, irrespective of the temperature and irradiation conditions and of the load electrical characteristics. A new MPPT system has been developed, consisting of a buck-type DC\\/DC converter, which is controlled by a microcontroller-based unit. The main difference between the method used in the

Eftichios Koutroulis; Kostas Kalaitzakis; Nicholas C. Voulgaris

2001-01-01

390

High-Power Accelerator Research and Development at the NRL 11.424GHz Magnicon Facility  

Microsoft Academic Search

An 11.424-GHz magnicon amplifier has been jointly developed by the Naval Research Laboratory and Omega-P, Inc. as an alternative technology to klystrons for powering a future X-band linear collider. This paper will discuss its background, operating principles, and results to date, as well its present status as a facility for collaborative research on accelerator-related technologies that require high-power 11.424-GHz radiation.

Steven H. Gold; Allen K. Kinkead; Oleg A. Nezhevenko; Vyacheslav P. Yakovlev; Jay L. Hirshfield; Anatoly Vikharev; Oleg Ivanov; Sergey Kuzikov; Alexey Gorbachev; Vladimir A. Isaev; Wei Gai; John G. Power; Richard Konecny

2002-01-01

391

Development of 22KW experimental platform for wind power generation system using SCIG  

Microsoft Academic Search

In order to research the actual state of the wind power generation in the laboratory, a 22KW wind power generation experimental platform using SCIG was developed. The platform includes: wind simulator, L-speed gear box, back-to-back converter, filter inductor and a 10-ton platform base. The wind simulator is composed by ABB's ACS550 inverter, three-phase squirrel-cage induction motor and reduction gear box.

Yulin Yang; Yidong Chen; Zhiyun Jia; Wang Liqiao; Weiyang Wu

2010-01-01

392

Development of a non-grid-connected wind power large-scale hydrogen production experimental System  

Microsoft Academic Search

A hydrogen production experimental system is developed to verify the theory of the non-grid-connected wind power. This experimental system analyzes the new type of wind turbine and its characteristics, the integrated control strategy, and the system feasibility and controllability so as to fully reveal the basic rules of non-grid-connected wind power system. These practices demonstrated the reasonable structure, convenient expansion

Xiaobin He; Weidong Gu

2009-01-01

393

Advances and challenges in the development of power-generation systems at small scales  

Microsoft Academic Search

The miniaturization of electro-mechanical devices, and the resulting need for micro-power generation (milliwatts to watts) with low weight, long life devices, has lead to the recent development of the field of micro-scale combustion and power generation. The primary objective of this new field is to leverage the high energy density of fuels, specifically liquid hydrocarbon fuels relative to batteries and

David C. Walther; Jeongmin Ahn

2011-01-01

394

Impact of natural gas market on power generation development in Russia  

Microsoft Academic Search

The paper concerned with research of natural gas market and itpsilas impact on power generation development in Russia. We can state that the gas share at thermal power plants of Russia, despite a sharp gas price rise (from 50$\\/1000 m3 currently to 170 $\\/1000 m3 in 2020), can be decreased only 11-12% in favor of increase in the coal share,

N. I. Voropai; V. I. Rabchuk; S. M. Senderov; N. I. Pyatkova

2008-01-01

395

Gallium nitride based high power heterojunction field effect transistors: process development and present status at UCSB  

Microsoft Academic Search

The development of GaN based devices for microwave power electronics at the University of California, Santa Barbara (UCSB), is reviewed. From 1995 to 2000, the power performance of AlGaN\\/GaN-on-sapphire heterojunction field effect transistors improved from 1.1 W\\/mm to 6.6 W\\/mm, respectively. Compensating the disadvantages of the low thermal conductivity of the sapphire substrate through heat management via flip chip bonding

Stacia Keller; Yi-Feng Wu; Giacinta Parish; Naiqian Ziang; Jane J. Xu; Bernd P. Keller; Steven P. DenBaars; Umesh K. Mishra

2001-01-01

396

Development, test and large production of soft switching high current power converters for particle accelerators  

Microsoft Academic Search

The large hadron collider (LHC) is the next particle accelerator being constructed on the CERN site. The 27 km long accelerator requires many high current (multi-kA) power converters to supply the superconducting magnets. This paper describes the development of a modular high current power converter, capable of supplying up to [8 kA, 8 V] using several current sources of [2

F. Bordry; V. Montabonnet; D. Nisbet; P. Korhonen; R. Turunen; H. Volotinen

2005-01-01

397

West European nuclear power generation research and development. (Foreign Applied Sciences Assessment Center Technical Assessment Report)  

Microsoft Academic Search

The report assesses the current and projected future status of nuclear power generation research and development (R and D) in Western Europe. The primary focus is on light-water reactor technology, but alternative concepts-specifically, high-temperature gas-cooled reactors and liquid-metal reactors-are also assessed. Nuclear power R and D for light-water reactors can have immediate commercial significance, and therefore is mostly conducted within

P. J. Turinsky; S. Baron; W. D. Burch; M. L. Corradini; G. E. Lucas

1991-01-01

398

Development of insulated gate bipolar transistor-based power supply for elemental copper vapour laser  

Microsoft Academic Search

The elemental copper vapour laser is a widely used laser from a family of metal vapour lasers for applications such as dye\\u000a laser pumping, micromachining etc. In this paper, we report the development and performance of IGBT-based pulsed power supply\\u000a that replaced conventional thyratron-based power supply for 4.7 cm diameter, 150 cm long copper vapour laser. The laser tube\\u000a delivered

R. K. Mishra; S. V. Nakhe; G. N. Tiwari; J. K. Mittal

2010-01-01

399

Paths for the development of fast power reactors with a high breeding factor  

Microsoft Academic Search

The assurance of nuclear power generation being developed with fuel resources over a long time is possible with the presence of fast breeder reactors in the system. Estimates show that for the necessary rate of growth of this multicomponent nuclear power generation, fast reactors are required with high breeding factors (BF ~1.6; T2 ~7-9 yrs). The construction of these reactors

S. B. Bobrov; A. V. Danilychev; V. A. Eliseev; O. A. Zhukova; Yu. A. Zverkov; V. G. Ilyunin; V. P. Matveev; A. G. Morozov; V. M. Myrogov; A. I. Novozhilov; V. V. Orlov; I. S. Slesarev; S. A. Subbotin; M. F. Troyanov; B. F. Shafrygin

1983-01-01

400

Development of C-band (5712 MHz) high power waveguide components  

Microsoft Academic Search

High power waveguide components at C-band (5712 MHz) frequencies have been developed for a main linac of a e+e- linear collider in the range 300-500 GeV C.M. energy. 350 MW of maximum rf power has to be transmitted through the waveguide components. An EIA-WR187 (W: 44.55 mm, H: 22.15 mm and t: 4 mm) type sized conventional rectangular waveguide was

H. Matsumoto; T. Shintake; N. Akasaka; H. Baba; A. Miura

1997-01-01

401

Recent developments in the average power capacity of rotary-field ferrite phase shifters  

Microsoft Academic Search

An air-cooled experimental S-band rotary-field ferrite phase shifter with an average power capacity of 3 kW is described. The increase in average power capacity was achieved without noticeable degradation of RF performance. An equivalent circuit model for thermal analysis is developed. The model parameters are determined by RF and temperature measurements. A comparison of the model parameters with those of

William E. Hord

1992-01-01

402

Developing an energy policy on power plant siting: the Utah experiment  

SciTech Connect

This article surveys the site selection experiences of the Kaiparowits Project and the Intermountain Power Project in Utah. It also traces the development of an energy policy for the state and the establishment of a unique intergovernmental coordination mechanism, the Utah Interagency Task Force on Power Plant Siting. The Utah experience affords a case study in policy adaptation designed to minimize unproductive political confrontation in regulatory forums. 76 references.

Hamilton, M.S.

1982-01-01

403

Development and performance analysis of an automotive power seat for disabled persons  

Microsoft Academic Search

As the number of disabled people grows, independence and mobility become a priority for those individuals. To achieve this\\u000a goal, a ‘Turny-type power seat’ was developed in this study to assist a disabled person rise from a vehicle without trouble.\\u000a The design and modeling of the power seat were performed using AutoCAD and CATIA software. The major motions of the

Y. Shi; I.-T. Lee; J.-I. Song

2009-01-01

404

Development and testing of a 20kW grid interactive photovoltaic power conditioning system in Western Australia  

Microsoft Academic Search

A prototype current-controlled power conditioning system has been developed and tested on a weak rural feeder line at Kalbarri, about 600 km northwest of Perth in Western Australia. This system sources 20 kW of power from a photovoltaic array with maximum power point tracking control. In addition, it provides voltage support for the power grid at Kalbarri by varying its

L. J. Borle; M. S. Dymond; C. V. Nayar

1997-01-01

405

Particulate Control Device (PCD) Testing at the Power Systems Development Facility, Wilsonville, Alabama  

SciTech Connect

One of the U.S. Department of Energy`s (DOE`s) objectives overseen by the Morgantown Energy Technology Center (METC) is to test systems and components for advanced coal-based power generation systems, including integrated gasification combined cycle (IGCC), pressurized fluidized-bed combustion (PFBC), and integrated gasification/fuel cell (IGFC) systems. Stringent particulate requirements for fuel gas for both combustion turbines and fuel cells that are integral to these systems. Particulates erode and chemically attack the blade surfaces in turbines, and cause blinding of the electrodes in fuel cells. Filtration of the hot, high-pressure, gasified coal is required to protect these units. Filtration can be accomplished by first cooling the gas, but the system efficiency is reduced. High-temperature, high-pressure, particulate control devices (PCDs) need to be developed to achieve high efficiency and to extend the lifetime of downstream components to acceptable levels. Demonstration of practical high-temperature PCDs is crucial to the evolution of advanced, high-efficiency, coal-based power generation systems. The intent at the Power Systems Development Facility (PSDF) is to establish a flexible test facility that can be used to (1) develop advanced power system components, such as high-temperature, high-pressure PCDs; (2) evaluate advanced power system configurations and (3) assess the integration and control issues of these advanced power systems.

Longanbach, J.R.

1995-12-01

406

Appropriate Methodology for Assessing the Economic Development Impacts of Wind Power  

SciTech Connect

OAK-B135 Interest in wind power development is growing as a means of expanding local economies. Such development holds promise as a provider of short-term employment during facility construction and long-term employment from ongoing facility operation and maintenance. It may also support some expansion of the local economy through ripple effects resulting from initial increases in jobs and income. However, there is a need for a theoretically sound method for assessing the economic impacts of wind power development. These ripple effects stem from subsequent expenditures for goods and services made possible by first-round income from the development, and are expressed in terms of a multiplier. If the local economy offers a wide range of goods and services the resulting multiplier can be substantial--as much as three or four. If not, then much of the initial income will leave the local economy to buy goods and services from elsewhere. Loss of initial income to other locales is referred to as a leakage. Northwest Economic Associates (NEA), under contract to the National Wind Coordinating Committee (NWCC), investigated three case study areas in the United States where wind power projects were recently developed. The full report, ''Assessing the Economic Development Impacts of Wind Power,'' is available at NWCC's website http://www.nationalwind.org/. The methodology used for that study is summarized here in order to provide guidance for future studies of the economic impacts of other wind power developments. The methodology used in the NEA study was specifically designed for these particular case study areas; however, it can be generally applied to other areas. Significant differences in local economic conditions and the amount of goods and services that are purchased locally as opposed to imported from outside the will strongly influence results obtained. Listed below are some of the key tasks that interested parties should undertake to develop a reasonable picture of local economic impacts that may accrue from existing or future wind development.

NWCC Economic Development Work Group

2003-12-17

407

Analysis and development of fourth order LCLC resonant based capacitor charging power supply for pulse power applications  

NASA Astrophysics Data System (ADS)

A fourth order (LCLC) resonant converter based capacitor charging power supply (CCPS) is designed and developed for pulse power applications. Resonant converters are preferred t utilize soft switching techniques such as zero current switching (ZCS) and zero voltage switching (ZVS). An attempt has been made to overcome the disadvantages in 2nd and 3rd resonant converter topologies; hence a fourth order resonant topology is used in this paper for CCPS application. In this paper a novel fourth order LCLC based resonant converter has been explored and mathematical analysis carried out to calculate load independent constant current. This topology provides load independent constant current at switching frequency (fs) equal to resonant frequency (fr). By changing switching condition (on time and dead time) this topology has both soft switching techniques such as ZCS and ZVS for better switching action to improve the converter efficiency. This novel technique has special features such as low peak current through switches, DC blocking for transformer, utilizing transformer leakage inductance as resonant component. A prototype has been developed and tested successfully to charge a 100 ?F capacitor to 200 V.

Naresh, P.; Hitesh, C.; Patel, A.; Kolge, T.; Sharma, Archana; Mittal, K. C.

2013-08-01

408

Development of hydrogen-fueled fuel cell-powered light-duty transportation engine  

SciTech Connect

To avoid the dire consequences, and yet ensure continued economic development, from the expected large increase in the global automobile population in the Third World, the transportation sector needs to move away from the internal combustion engine to fuel cell powered vehicles that operate on hydrogen. A research, development, and demonstration (RD&D) program is proposed to establish the superiority of the hydrogen-fueled, PEM (proton exchange membrane) fuel cell-powered engine compared to the present internal combustion engine powertrain. This new drivetrain will lead to a major decrease in environmental pollution. ORNL is seeking funding to undertake this RD&D program.

Singh, S.P.N.; adams, D.J.; Keever, J.W.

1996-05-30

409

Progress Toward Development of an IFE Power Plant Using Z-Pinch Technology  

SciTech Connect

The Z-Pinch Power Plant uses the results from Sandia National Laboratories' Z accelerator in a power plant application to generate energy pulses using inertial confinement fusion. A collaborative project has been initiated by Sandia to investigate the scientific principles of a power generation system using this technology. Research is under way to develop an integrated concept that describes the operational issues of a 1000 MW electrical power plant. Issues under consideration include: 1-20 gigajoule fusion pulse containment, repetitive mechanical connection of heavy hardware, generation of terawatt pulses every 10 seconds, recycling of ten thousand tons of steel, and manufacturing of millions of hohlraums and capsules per year.Additionally, waste generation and disposal issues are being examined. This paper describes the current concept for the plant and also the objectives for future research.

Rochau, Gary E. [Sandia National Laboratories (United States)] (and others)

2005-04-15

410

Progress toward development of an IFE power plant using Z-Pinch technology.  

SciTech Connect

The Z-Pinch Power Plant uses the results from Sandia National Laboratories Z accelerator in a power plant application to generate energy pulses using inertial confinement fusion. A collaborative project has been initiated by Sandia to investigate the scientific principles of a power generation system using this technology. Research is under way to develop an integrated concept that describes the operational issues of a 1000 MW electrical power plant. Issues under consideration include: 1-20 gigajoule fusion pulse containment, repetitive mechanical connection of heavy hardware, generation of terawatt pulses every 10 seconds, recycling of ten thousand tons of steel, and manufacturing of millions of hohlraums and capsules per year. Additionally, waste generation and disposal issues are being examined. This paper describes the current concept for the plant and also the objectives for future research.

Rochau, Gary Eugene

2004-09-01

411

Development and demonstration of high-average power W-band gyro-amplifiers for radar applications  

Microsoft Academic Search

The results of a focused program to develop high-power W-band gyro-amplifiers, which culminated in the demonstration of record average output powers from amplifiers in this band, are described. Following an experimental and theoretical study of low-duty prototype amplifiers, two high-average power devices were designed, built, and demonstrated. The first high-average power amplifier achieved 10.1-kW average output power at 33% efficiency

Monica Blank; K. Felch; B. G. James; P. Borchard; P. Cahalan; T. S. Chu; H. Jory; Bruce G. Danly; Baruch Levush; J. P. Calame; Khanh T. Nguyen; Dean E. Pershing

2002-01-01

412

The future of nuclear energy: A perspective on nuclear power development  

SciTech Connect

The author begins by discussing the history of nuclear power development in the US. He discusses the challenges for nuclear power such as the proliferation of weapons material, waste management, economics, and safety. He then discusses the future for nuclear power, specifically advanced reactor development. People can all be thankful for nuclear power, for it may well be essential to the long term survival of civilization. Within the seeds of its potential for great good, are also the seeds for great harm. People must ensure that it is applied for great good. What is not in question is whether people can live without it, they cannot. United States leadership is crucial in determining how this technology is developed and applied. The size and capability of the United States technical community is decreasing, a trend that cannot be allowed to continue. It is the author's belief that in the future, the need, the vision and the confidence in nuclear power will be restored, but only if the US addresses the immediate challenges. It is a national challenge worthy of the best people this nation has to offer.

Sackett, J. I.

2000-04-03

413

Power Systems Development Facility. Technical Progress Report Gasification Test Run GCT4 March 7 - March 30, 2001.  

National Technical Information Service (NTIS)

This report discusses test campaign GCT4 of the Kellogg Brown & Root, Inc. (KBR) transport reactor train with a Siemens Westinghouse Power Corporation (Siemens Westinghouse) particle filter system at the Power Systems Development Facility (PSDF) located i...

2002-01-01

414

Development of a driver board power supply for high power IGBTs used in three-phase inverters  

Microsoft Academic Search

High power IGBTs have been widely used for medium power inverters up to 200 kVA. Their driver circuits often require multiple-output, isolated power supplies. This paper presents a simple flyback power supply especially designed for the driver boards of three-phase IGBT inverters. The detailed circuit diagrams and typical waveforms are reported. Certain performance data are given. The power supplies have

Liuchen Chang

1996-01-01

415

Development of Decision Support Tools for Maintenance Strategy of Electric Power Equipment  

NASA Astrophysics Data System (ADS)

Development of decision support tools for maintenance strategy of electric power equipment based on the asset management technique becomes very intensive in order to reduce maintenance cost due to the liberalization of power business. In these years many theses have been presented about asset management in this area, but there are not yet so many concrete researches. This article introduces two approaches of decision support tool development for power equipment in CRIEPI. One is to support evaluation of dissolved gas analysis for oil-immersed transformers. It provides comparison to data obtained from the same kind of transformers, and criteria among them. The other is to evaluate average annual maintenance cost by considering an overhaul effect and failure risk. It provides an optimum overhaul strategy with suitable parameters.

Takahashi, Tsuguhiro; Okamoto, Tatsuki

416

Development of SMES for power system control: present status and perspective  

NASA Astrophysics Data System (ADS)

A present Japanese national project for SMES development focuses on the development of cost reduction technologies for a small-scale SMES for power system control. Optimal SMES system concepts were developed for power system stabilization and for load fluctuation compensation or frequency regulation. Performance of the designed superconductors was analyzed through fabrication and tests of short sample superconductors. Then, two kinds of model coil systems were manufactured and tested for evaluation of the design concepts and cost reduction technology developments. A multi-pole solenoid coil set as a model coil system for load fluctuation compensation SMES was successfully tested, for example, in 10000-pulse iterative charge-discharge operations. In addition, application of high-TC superconductors to SMES has been studied for further cost reduction, more reliable operation, etc.

Ohsaki, H.; Taniguchi, S.; Nagaya, S.; Akita, S.; Koso, S.; Tatsuta, M.

2004-10-01

417

Theoretical Borderlands: Using Multiple Theoretical Perspectives to Challenge Inequitable Power Structures in Student Development Theory  

ERIC Educational Resources Information Center

|This article is an exploration of possibilities and methodological considerations for using multiple theoretical perspectives in research that challenges inequitable power structures in student development theory. Specifically, I explore methodological considerations when partnering queer theory and constructivism in research on lesbian identity…

Abes, Elisa S.

2009-01-01

418

Development of automated operating procedure system using fuzzy colored petri nets for nuclear power plants  

Microsoft Academic Search

In this work, AuTomated Operating Procedure System (ATOPS) is developed. ATOPS is an automation system for emergency operation of a nuclear power plant (NPP) and it can monitor signals, diagnose statuses, and generate control actions according to corresponding operating procedures without any human operator’s help. Main functions of ATOPS are an anomaly detection function and a procedure execution function but

Seung Jun Lee; Poong Hyun Seong

2004-01-01

419

Development of an advanced human–machine interface for next generation nuclear power plants  

Microsoft Academic Search

An advanced human–machine interface (HMI) has been developed to enhance the safety and availability of a nuclear power plant (NPP) by improving operational reliability. The key elements of the proposed HMI are the large display panels which present synopsis of plant status and the compact, computer-based work stations for monitoring, control and protection functions. The work station consists of four

Soon Heung Chang; Seong Soo Choi; Jin Kyun Park; Gyunyoung Heo; Han Gon Kim

1999-01-01

420

P1–5: Development of a 300W peak power J-band klystron  

Microsoft Academic Search

Klystron is vacuum electron device operating in microwave range of frequencies. It is used as power amplifier in a variety of systems including radars, particle accelerators and thermonuclear reactors. With the availability of very reliable design codes, it is now possible to optimize the design and develop a tube with minimum iterations in fabrication. In the present case standard design

L. M. Joshi; D. Pal; D. Kant; S. Ratan; A. R. Choudhury; V. Jindal; S. Jangid; S. Sharma; R. Meena; S. C. Nangru; R. K. Sharma; S. Arya

2010-01-01

421

Developing and Disseminating a Tested Model Curriculum of Contemporary Farm Power and Equipment. Final Report.  

ERIC Educational Resources Information Center

|Modern, innovative, and emerging technologies in farm power and equipment for secondary and postsecondary vocational agriculture programs were developed, field tested, and disseminated through a 3-year project in Arkansas. During the project, a needs assessment survey was sent to 272 vocational agriculture teachers in the state asking which areas…

Rolloff, John A.; Braker, Clifton R.

422

Development of quench protection system for HTS coils by active power method  

Microsoft Academic Search

Recently, HTS coils have been developed for electric power apparatuses. In superconducting coils, local and excessive joule heating may give damage to the superconducting windings when a quench occurs and therefore it is essential that the quench is detected quickly and precisely so that the coils can be safely discharged. Resistive voltage measurement method is universally used for the quench

N. Nanato; Y. Tsumiyama; S. B. Kim; S. Murase; K.-C. Seong; H.-J. Kim

2007-01-01

423

Development of Dual Input/Dual Purpose Power Converter for Trolley Wire Operation.  

National Technical Information Service (NTIS)

A power supply to operate fluorescent or mercury vapor lamps from 300-volt dc coal mine trolley wires has been developed for the Bureau of Mines. A high-frequency regulated inverter unit incorporates ballasts for a mix of lamp loads up to 650 watts. For 6...

D. A. Paice D. S. Kimmel R. P. Putkovich

1979-01-01

424

Monopropellant-Powered Actuator for the Development of a Lower Limb Exoskeleton.  

National Technical Information Service (NTIS)

The objective of the proposed work is to develop and demonstrate an actuation system that provides direct chemical to mechanical energy conversion from an energy source that is approximately an order of magnitude more energy dense and power dense than the...

M. Goldfarb

2001-01-01

425

In-Situ Particulate Sampling and Characterization at the Power Systems Development Facility  

Microsoft Academic Search

This paper discusses the design and application of in-situ particulate sampling systems in evaluating the performance of high-temperature, high-pressure (HTHP) gas-filtration systems at the Power Systems Development Facility (PSDF) in Wilsonville, Alabama. Initial operating experience with the sampling systems is reviewed, and results of initial sampling runs are discussed.

Robert S. Dahlin; E. C. Landham; Howard L. Hendrix

1998-01-01

426

Workshop: Research and development plans for high power spallation neutron testing at BNL  

SciTech Connect

This report consists of vugraphs from presentations at the meeting. The papers covered the following topics: (1) APS as a proton source; (2) target status for NSNS (National Spallation Neutron Source); (3) spallation neutron source in Japan; (4) liquid LiBi flow loop; and (5) research and development plans for high power tests at the AGS.

NONE

1996-08-05

427

ELSA: an electric power supply analysis model for the Pacific Northwest. [Effects of developments  

Microsoft Academic Search

Battelle, Pacific Northwest Laboratory (PNL) is conducting a program to help assess impacts of energy-related developments through the year 2025 in six northwestern states--Washington, Oregon, Idaho, Montana, Wyoming and Alaska. ELSA (Electric Power Supply Analysis Model), one component of this overall program, is a simulation model of the electric supply system in the Pacific Northwest designed to better define future

T. P. Harrington; J. J. Jacobsen

1976-01-01

428

Development of a Quiet Stirling Cycle Multi-Fuel Engine for Electric Power Generation.  

National Technical Information Service (NTIS)

The work described in this report summarizes a six-month study to develop a lightweight, tactical electric power plant with a low level of aural, I. R., and visual detectability, based on a Stirling engine. The conceptual design presented was analyzed and...

J. E. Mercer S. G. Emigh P. Riggle O. L. Tremoulet M. A. White

1982-01-01

429

DEVELOPMENT OF A HIGH POWER FIBRE LASER FOR LASER BASED ELECTRON BEAM DIAGNOSTICS  

Microsoft Academic Search

We present the latest results on the development of a high power fibre laser system for use in a linear collider laser-wire experiment. The laser consists of a solid state oscillator which can be synchronised to an external frequency reference, and two amplification stages in double clad doped fibre, giving 1?J pulses in a burst mode suitable for a linear

L. Corner; L. J. Nevay; N. Delerue; D. F. Howell; M. Newman; R. Walczak

2008-01-01

430

Task analysis in support of the design and development of a nuclear power plant safety system  

Microsoft Academic Search

The application of task analysis to assess the adequacy of a proposed design for an independent feed system for use on a number of nuclear power stations is described. The objectives of the analysis are identified and the methodology to achieve these objectives is developed. The analysis examines the demands made upon station operations staff to commission the proposed feed

IAN G. UMBERS; CRAIG S. REIERSEN

1995-01-01

431

Water use in the development and operation of geothermal power plants  

Microsoft Academic Search

Geothermal energy is increasingly recognized for its potential to reduce carbon emissions and U.S. dependence on foreign oil. Energy and environmental analyses are critical to developing a robust set of geothermal energy technologies. This report summarizes what is currently known about the life cycle water requirements of geothermal electric power-generating systems and the water quality of geothermal waters. It is

C. E. Clark; C. B. Harto; J. L. Sullivan; M. Q. Wang

2010-01-01

432

Development Status of Power Processing Unit For 250mN-class Hall Thruster  

Microsoft Academic Search

Mitsubishi Electric Corporation (MELCO) has been developing the next generation ion engine under the contract of Unmanned Space experiment Free Flyer (USEF) and Ministry of Economic, Trade and Industry (METI) for six years. The final target performance is that the thrust level is more than 250mN, specific impulse is more than 1500 sec under supplying the electric power less than

Hiroyuki Osuga; Kentaro Suzuki; Toshiyuki Ozaki; Takafumi Nakagawa; Ikuro Sug; Taichiro Tamida; Yoshiyuki Akuzawa; Fumitoshi Sog; Hirokazu Suzuki

433

Participation and Power: Reflections on the Role of Government in Land Use Planning and Rural Development  

ERIC Educational Resources Information Center

|Purpose: To examine the role of power in interactive policymaking settings. Design/Methodology/Approach: A literature study is combined with four case studies relating to citizen participation in natural resource management and rural development in the Netherlands. Findings: Many of the identified problems and dilemmas of interactive policymaking…

Aarts, Noelle; Leeuwis, Cees

2010-01-01

434

Superconducting power transmission line materials research and conductor development. Final report  

Microsoft Academic Search

The feasibility of transferring the conductor technology developed on tubes to more practical tape conductors was investigated and a variety of studies aimed at improving the basic understanding of the important superconducting properties crucial to superconducting power transmission line (SPTL) applications were continued. The major objectives were: to produce one to three meter long tapes of multi-layered prototype NbâSn tape

T. H. Geballe; M. R. Beasley

1977-01-01

435

CAE-tool for optimizing development of switched mode power supplies  

Microsoft Academic Search

A novel methodology and its implementation into a computer based development tool for switched mode power supplies is described. The tool consists of a number of modules for topology and component selection, circuit, controller, magnetic component and thermal design, embedded into the multi domain simulator SIMPLORER. Core of the tool is the expert system shell CLIPS, which in conjunction with

N. Froehleke; D. Hahm; H. Mundinger; H. Njiende; P. Wallmeier; H. Puder

2001-01-01

436

Development and diffusion of the nuclear power reactor: a comparative analysis  

Microsoft Academic Search

This book focuses on the political and technological institutions that developed and disseminated the nuclear power reactor in six nations: the United States, England, France, the Soviet Union, the Federal Republic of Germany, and Canada. As such, it presents extensive case studies of these nations' developmental programs and, even more important, presents a generalized analytic framework which facilitates the comparison

DeLeon

1979-01-01

437

DEVELOPMENT OF NUCLEAR POWER PLANT SIMULATORS FOR SOVIET-DESIGNED NUCLEAR REACTORS  

Microsoft Academic Search

The US Department of Energy (US DOE), under the US government's International Nuclear Safety Program (INSP), is implementing a program of developing and providing simulators for many of the Russian and Ukrainian Nuclear Power Plants (NPPs). Pacific Northwest National Laboratory (PNNL) and Brookhaven National Laboratory (BNL) manage and provide technical oversight of the various INSP simulator projects for DOE. The

P. Kohut; N. K. Tutu; E. J. Cleary; K. G. Erickson; J. Yoder; A. Kroshilin

2001-01-01

438

Development of a concept of safety for nuclear power plants in Russia  

Microsoft Academic Search

The historical evolution of safety standards for nuclear power plants in Russia is presented. Initial standards developed are described and compared to revisions made nine years later. Examination of the revised standards made following the Chernobyl accident is outlined. Finally, the current political and regulatory climate affecting safety standards is very briefly described.

Bukrinskii

1994-01-01

439

Potential of wind power projects under the Clean Development Mechanism in India  

Microsoft Academic Search

BACKGROUND: So far, the cumulative installed capacity of wind power projects in India is far below their gross potential (? 15%) despite very high level of policy support, tax benefits, long term financing schemes etc., for more than 10 years etc. One of the major barriers is the high costs of investments in these systems. The Clean Development Mechanism (CDM)

Pallav Purohit; Axel Michaelowa

2007-01-01

440

Seismic reevaluation and upgrading of nuclear power facilities outside the US using US developed methodologies  

Microsoft Academic Search

Several seismic licensing and safety issues have emerged over the past fifteen years for commercial US Nuclear Power Plants and US Government research reactors, production reactors and process facilities. The methodologies for the resolution of these issues have been developed in numerous government and utility sponsored research programs. The resolution criteria have included conservative deterministic design criteria, deterministic seismic margins

R Campbell; S Short; M Ravindra; G Hardy; J Johnson

1998-01-01

441

Development of corrosion models to ensure reliable performance of nuclear power plants  

Microsoft Academic Search

The safety and reliability of the coolant circuits in nuclear power plants depend much on corrosion and corrosion products transfer processes. Various empirical models have been developed which are applicable to particular sets of operational conditions. In our laboratory a corrosion model has been worked out, which is based on the thermodynamic properties of the compounds, participating in corrosion process

V. G. Kritzky; P. S. Stjazhkin

1993-01-01

442

Performance test results for the Eaton dc development power train in an electric test bed vehicle  

Microsoft Academic Search

This report presents the results of the tests performed on a direct current (dc) power train in a test bed vehicle developed by the Eaton Corporation for the U.S. Department of Energy (DOE). The tests were performed by EG and G Idaho, Inc. at the Idaho National Engineering Laboratory (INEL). The purpose of the INEL testing was to provide test

R. L. Crumley; M. R. Donaldson

1987-01-01

443

Onshore wind power development in China: Challenges behind a successful story  

Microsoft Academic Search

Wind energy utilization, especially onshore grid-connected wind power generation, has a history of 30 years in China. With the increasing attention to renewable energy development in recent years, wind energy has become the focus of academic research and policy-making. While the potential and advantages of wind energy are widely recognized, many questions regarding the effectiveness of policies and performances of

Jingyi Han; Arthur P. J. Mol; Yonglong Lu; Lei Zhang

2009-01-01

444

Participation, Power, and Policy: Developing a Gender-Sensitive Political Geography.  

ERIC Educational Resources Information Center

|Outlines three approaches to exploring gender-sensitive political geography: (1) examining formal (voting and holding office) and informal (activism and interest groups) political activity; (2) delineating the variety of gender-based power constructs; and (3) reviewing recent policy developments, specifically the Family and Medical leave Act of…

Cope, Meghan

1997-01-01

445

Development of high power, frequency tunable, submillimeter wave sources - Gyrotron FU series  

Microsoft Academic Search

The gyrotrons developed at Fukui University (Gyrotron FU series) are high frequency, high power devices, covering a broad frequency band in the millimeter and submillimeter wavelength region. Currently, the Gyrotron FU series consists of eight gyrotrons. In this paper, we summarize and illustrate some of the achievements of the Gyrotron FU series.

T. Idehara; S. Mitsudo; S. Sabchevski; M. Glyavin; I. Ogawa

2000-01-01

446

Development of a power electronics unit for the Space Station plasma contactor  

Microsoft Academic Search

A hollow cathode plasma contactor has been baselined as a charge control device for the Space Station (SS) to prevent deleterious interactions of coated structural components with the ambient plasma. NASA LeRC Work Package 4 initiated the development of a plasma contactor system comprised of a Power Electronics Unit (PEU), an Expellant Management Unit (EMU), a command and data interface,

John A. Hamley; Gerald M. Hill; Michael J. Patterson; Joseph Saggio Jr.; Fred Terdan; Justin D. Mansell

1994-01-01

447

Development of a propulsion system and component test facility for advanced radioisotope powered Mars Hopper platforms  

Microsoft Academic Search

Verification and validation of design and modeling activities for radioisotope powered Mars Hopper platforms undertaken at the Center for Space Nuclear Research is essential for proof of concept. Previous research at the center has driven the selection of advanced material combinations; some of which require specialized handling capabilities. The development of a closed and contained test facility to forward this

Robert C. OBrien; Nathan D. Jerred; Steven D. Howe

2011-01-01

448

Development of Lithium-ion Battery as Energy Storage for Mobile Power Sources Applications  

Microsoft Academic Search

In view of the need to protect the global environment and save energy, there has been strong demand for the development of lithium-ion battery technology as a energy storage system, especially for Light Electric Vehicle (LEV) and electric vehicles (EV) applications. The R&D trend in the lithium-ion battery development is toward the high power and energy density, cheaper in price

Mohd Ali Sulaiman; Hasimah Hasan

2009-01-01

449

Development of high-power, compact synthetic jet actuators for flow separation control  

Microsoft Academic Search

This work presents the development of high-power, compact synthetic jet actuators (SJA) for flow separation control. The developed actuator is compact enough to fit in the interior of a NACA0015 profiled wing with a chord of 0.375 in. Test bench experiments showed that the multi-piston actuator array was capable of producing exit velocities of up to 90 m\\/s for an

Jose Luis Gilarranz Runge

2001-01-01

450

Small hydro power projects under clean development mechanism in India: A preliminary assessment  

Microsoft Academic Search

The clean development mechanism (CDM) of the Kyoto Protocol provides Annex-I countries with an incentive to invest in emission reduction projects in non-Annex-I countries to achieve a reduction in carbon dioxide (CO2) emissions at lowest cost that also promotes sustainable development in the host country. Small hydro power (SHP) projects could be of interest under the CDM because they directly

Pallav Purohit

2008-01-01

451

Plasma imaging and spectroscopy diagnostics developed on 100-500kA pulsed power devices  

Microsoft Academic Search

We discuss the development of high-resolution plasma imaging and spectroscopy diagnostics for the soft X-ray and ultraviolet energy ranges developed and used on 100-500 kA pulsed power facilities. Requiring just a few people to run and modest infrastructure investment, these facilities are cost-effective test beds for new ideas and technologies as well as for training students. Most of the diagnostics

DANIEL B. SINARS; LEV GREGORIAN; DAVID A. HAMMER; YITZHAK MARON

2004-01-01

452

Power Shortages in Developing Countries: Magnitude, Impacts, Solutions, and the Role of the Private Sector: A Report to Congress.  

National Technical Information Service (NTIS)

The need to provide adequate electricity in developing countries is of critical importance to the U.S. Energy is critical for sustainable economic development. As growth proceeds, developing countries require more electric power to satisfy the requirement...

1988-01-01

453

Biopower markets in developing countries: Meeting the demands for cleaner power  

SciTech Connect

The worldwide expansion of democracy economic freedom and the explosion of private investment and trading is fueling a boom in global economic growth at double the rate of only a decade ago. Dependence on power and process heat is growing in lockstep during a time of significant structural change in electric markets. Many countries are creating more competitive market environments for power production and sales through changes in regulation, ownership, and pricing structures. But while demand for heat and power is expanding and creating a higher standard of living for many around the world, there is growing global concern about increases in carbon emissions from fossil fuel combustion and its possible link to climate changes. On a local level, flooding and non-point runoff, deforestation and habitat loss, salination of drinking water aquifers, solid waste disposal and landfill capacity shortages all put an increasing strain on our environment`s ability to cleanse itself. This could have subsequent adverse impacts on human health and welfare. This article explores emerging markets for biomass power development in India, china, Asia, and Latin America. Exploiting these markets requires understanding each country`s resources, energy needs, and government attitudes about foreign power developers. 6 figs.

Demeter, C.P.

1997-12-31

454

Development of Decision Model for Selection of Appropriate Power Generation System Using Distance Based Approach Method  

NASA Astrophysics Data System (ADS)

For solving decision problems in electric generation planning, a matrix operation based deterministic quantitative model called the Distance Based Approach (DBA) has been proposed for comparing the technical-economical and environmental features of various electric power plants. The customized computer code is developed to evaluate the overall function of alternative energy systems from the performance pattern corresponding to the selected energy attributes. For the purpose of exploring the applicability and the effectiveness of the proposed model, the model is applied to decision problems concerning the selection of energy sources for power generation in Japan. The set of nine energy alternatives includes conventional and new energy technologies of oil fired-, natural gas fired-, coal fired-, nuclear power, hydropower, geothermal, solar photovoltaic, wind power and solar thermal plants. Also, a set of criteria for optimized selection includes five areas of concern; energy economy, energy security, environmental protection, socio-economic development and technological aspects for electric power generation. The result will be a ranking of alternative sources of energy based on the Euclidean composite distance of each alternative to the designated optimal source of energy.

Widiyanto, Anugerah; Kato, Seizo; Maruyama, Naoki

455

Development of a cogenerating thermophotovoltaic powered combination hot water heater/hydronic boiler  

NASA Astrophysics Data System (ADS)

A cogenerating thermophotovoltaic (TPV) device for hot water, hydronic space heating, and electric power generation was developed, designed, fabricated, and tested under a Department of Energy contracted program. The device utilizes a cylindrical ytterbia superemissive ceramic fiber burner (SCFB) and is designed for a nominal capacity of 80 kBtu/hr. The burner is fired with premixed natural gas and air. Narrow band emission from the SCFB is converted to electricity by single crystal silicon (Si) photovoltaic (PV) arrays arranged concentrically around the burner. A three-way mixing valve is used to direct heated water to either the portable water storage tank, radiant baseboard heaters, or both. As part of this program, QGI developed a microprocessor-based control system to address the safety issues, as well as photovoltaic power management. Flame sensing is accomplished via the photovoltaics, a technology borrowed from QGI's Quantum Control™ safety shut-off system. Device testing demonstrated a nominal photovoltaic power output of 200 W. Power consumed during steady state operation was 33 W, with power drawn from the combustion air blower, hydronic system pump, three-way switching valve, and the control system, resulting in a net power surplus of 142 W. Power drawn during the ignition sequence was 55 W, and a battery recharge time of 1 minute 30 seconds was recorded. System efficiency was measured and found to be more than 83%. Pollutant emissions at determined operating conditions were below the South Coast Air Quality Management District's (California) limit of 40 ng/J for NOx, and carbon monoxide emissions were measured at less than 50 dppm.

Kushch, Aleksandr S.; Skinner, Steven M.; Brennan, Richard; Sarmiento, Pedro A.

1997-03-01

456

Innovative Approaches to Development and Ground Testing of Advanced Bimodal Space Power and Propulsion Systems  

SciTech Connect

The last major development effort for nuclear power and propulsion systems ended in 1993. Currently, there is not an initiative at either the National Aeronautical and Space Administration (NASA) or the U.S. Department of Energy (DOE) that requires the development of new nuclear power and propulsion systems. Studies continue to show nuclear technology as a strong technical candidate to lead the way toward human exploration of adjacent planets or provide power for deep space missions, particularly a 15,000 lbf bimodal nuclear system with 115 kW power capability. The development of nuclear technology for space applications would require technology development in some areas and a major flight qualification program. The last major ground test facility considered for nuclear propulsion qualification was the U.S. Air Force/DOE Space Nuclear Thermal Propulsion Project. Seven years have passed since that effort, and the questions remain the same, how to qualify nuclear power and propulsion systems for future space flight. It can be reasonable assumed that much of the nuclear testing required to qualify a nuclear system for space application will be performed at DOE facilities as demonstrated by the Nuclear Rocket Engine Reactor Experiment (NERVA) and Space Nuclear Thermal Propulsion (SNTP) programs. The nuclear infrastructure to support testing in this country is aging and getting smaller, though facilities still exist to support many of the technology development needs. By renewing efforts, an innovative approach to qualifying these systems through the use of existing facilities either in the U.S. (DOE's Advance Test Reactor, High Flux Irradiation Facility and the Contained Test Facility) or overseas should be possible.

Hill, Thomas Johnathan; Noble, Cheryl Ann; Noble, C.; Martinell, John Stephen; Borowski, S.

2000-07-01

457

Potential of wind power projects under the Clean Development Mechanism in India  

PubMed Central

Background So far, the cumulative installed capacity of wind power projects in India is far below their gross potential (? 15%) despite very high level of policy support, tax benefits, long term financing schemes etc., for more than 10 years etc. One of the major barriers is the high costs of investments in these systems. The Clean Development Mechanism (CDM) of the Kyoto Protocol provides industrialized countries with an incentive to invest in emission reduction projects in developing countries to achieve a reduction in CO2 emissions at lowest cost that also promotes sustainable development in the host country. Wind power projects could be of interest under the CDM because they directly displace greenhouse gas emissions while contributing to sustainable rural development, if developed correctly. Results Our estimates indicate that there is a vast theoretical potential of CO2 mitigation by the use of wind energy in India. The annual potential Certified Emissions Reductions (CERs) of wind power projects in India could theoretically reach 86 million. Under more realistic assumptions about diffusion of wind power projects based on past experiences with the government-run programmes, annual CER volumes by 2012 could reach 41 to 67 million and 78 to 83 million by 2020. Conclusion The projections based on the past diffusion trend indicate that in India, even with highly favorable assumptions, the dissemination of wind power projects is not likely to reach its maximum estimated potential in another 15 years. CDM could help to achieve the maximum utilization potential more rapidly as compared to the current diffusion trend if supportive policies are introduced.

Purohit, Pallav; Michaelowa, Axel

2007-01-01

458

Innovation Approaches to Development and Ground Testing of Advanced Bimodal Space Power and Propulsion Systems  

SciTech Connect

The last major development effort for nuclear power and propulsion systems ended in 1993. Currently, there is not an initiative at either the National Aeronautical and Space Administration (NASA) or the U.S. Department of Energy (DOE) that requires the development of new nuclear power and propulsion systems. Studies continue to show nuclear technology as a strong technical candidate to lead the way toward human exploration of adjacent planets or provide power for deep space missions, particularly a 15,000 lbf bimodal nuclear system with 115 kW power capability. The development of nuclear technology for space applications would require technology development in some areas and a major flight qualification program. The last major ground test facility considered for nuclear propulsion qualification was the U.S. Air Force/DOE Space Nuclear Thermal Propulsion Project. Seven years have passed since that effort, and the questions remain the same, how to qualify nuclear power and propulsion systems for future space flight. It can be reasonably assumed that much of the nuclear testing required to qualify a nuclear system for space application will be performed at DOE facilities as demonstrated by the Nuclear Rocket Engine Reactor Experiment (NERVA) and Space Nuclear Thermal Propulsion (SNTP) programs. The nuclear infrastructure to support testing in this country is aging and getting smaller, though facilities still exist to support many of the technology development needs. By renewing efforts, an innovative approach to qualifying these systems through the use of existing facilities either in the U.S. (DOE's Advance Test Reactor, High Flux Irradiation Facility and the Contained Test Facility) or overseas should be possible.

Hill, T.; Noble, C.; Martinell, J. (INEEL); Borowski, S. (NASA Glenn Research Center)

2000-07-14

459

Power System Concepts for the Lunar Outpost: A Review of the Power Generation, Energy Storage, Power Management and Distribution (PMAD) System Requirements and Potential Technologies for Development of the Lunar Outpost  

NASA Astrophysics Data System (ADS)

This paper will review potential power system concepts for the development of the lunar outpost including power generation, energy storage and power management and distribution (PMAD). In particular, the requirements of the initial robotic missions will be discussed and the technologies considered will include cryogenics and regenerative fuel cells (RFC), AC and DC transmission line technology, high voltage and low voltage power transmission, conductor materials of construction and power beaming concepts for transmitting power to difficult to access locations such as at the bottom of craters. Operating conditions, component characteristics, reliability, maintainability, constructability, system safety, technology gaps / risk and adaptability for future lunar missions will be discussed for the technologies considered.

Khan, Z.; Vranis, A.; Zavoico, A.; Freid, S.; Manners, B.

2006-01-01

460

Development of PbTe material for advanced thermoelectric power generation  

NASA Astrophysics Data System (ADS)

In this paper, development of single crystalline n- and p- type PbTe crystals and PbTe bulk nanocomposites using PbTe nano powders and emerging field assisted sintering technology (FAST) are discussed. Materials requirements for efficient thermoelectric power generation using waste heat at intermediate temperature range (6500 to 8500 K) will be discussed. Recent results on production of n- and p- type PbTe crystals and their thermoelectric characterization will be presented. Relative characteristics and performance of PbTe bulk single crystals and nano composites for thermoelectric power generation will be discussed.

Prasad, Narasimha S.; Trivedi, Sudhir B.; Palosz, Witold; Rosemeier, Robert; Rosemeier, Cory; Kutcher, Susan; Mayers, David; Taylor, Patrick J.; Maddux, Jay; Singh, Jogender

2012-05-01

461

Controlling boomtown development: lessons from the Intermountain Power Project. Part One  

SciTech Connect

In 1974, the Intermountain Consumer Power Association began planning the construction of a fifteen hundred megawatt coal-fired electric generating plant which was ultimately located near the town of Lynndyl, Utah. Throughout the planning process, officials of the Intermountain Power Project were determined to avoid the litany of problems which commonly plague energy boomtowns. In the first part of a two-part article, the author describes the efforts of project planners in cooperation with city, county, and state officials to mitigate and alleviate the impact of the development on the local community. The second part of the article will evaluate the extent to which these efforts succeeded.

Zillman, D.

1986-01-01

462

Electric Power Infrastructure Reliability and Security (EPIRS) Reseach and Development Initiative  

SciTech Connect

Power systems have become increasingly complex and face unprecedented challenges posed by population growth, climate change, national security issues, foreign energy dependence and an aging power infrastructure. Increased demand combined with increased economic and environmental constraints is forcing state, regional and national power grids to expand supply without the large safety and stability margins in generation and transmission capacity that have been the rule in the past. Deregulation, distributed generation, natural and man-made catastrophes and other causes serve to further challenge and complicate management of the electric power grid. To meet the challenges of the 21st century while also maintaining system reliability, the electric power grid must effectively integrate new and advanced technologies both in the actual equipment for energy conversion, transfer and use, and in the command, control, and communication systems by which effective and efficient operation of the system is orchestrated - in essence, the 'smart grid'. This evolution calls for advances in development, integration, analysis, and deployment approaches that ultimately seek to take into account, every step of the way, the dynamic behavior of the system, capturing critical effects due to interdependencies and interaction. This approach is necessary to better mitigate the risk of blackouts and other disruptions and to improve the flexibility and capacity of the grid. Building on prior Navy and Department of Energy investments in infrastructure and resources for electric power systems research, testing, modeling, and simulation at the Florida State University (FSU) Center for Advanced Power Systems (CAPS), this project has continued an initiative aimed at assuring reliable and secure grid operation through a more complete understanding and characterization of some of the key technologies that will be important in a modern electric system, while also fulfilling an education and outreach mission to provide future energy workforce talent and support the electric system stakeholder community. Building upon and extending portions of that research effort, this project has been focused in the following areas: (1) Building high-fidelity integrated power and controls hardware-in-the-loop research and development testbed capabilities (Figure 1). (2) Distributed Energy Resources Integration - (a) Testing Requirements and Methods for Fault Current Limiters, (b) Contributions to the Development of IEEE 1547.7, (c) Analysis of a STATCOM Application for Wind Resource Integration, (d) Development of a Grid-Interactive Inverter with Energy Storage Elements, (e) Simulation-Assisted Advancement of Microgrid Understanding and Applications; (3) Availability of High-Fidelity Dynamic Simulation Tools for Grid Disturbance Investigations; (4) HTS Material Characterization - (a) AC Loss Studies on High Temperature Superconductors, (b) Local Identification of Current-Limiting Mechanisms in Coated Conductors; (5) Cryogenic Dielectric Research; and (6) Workshops, education, and outreach.

Rick Meeker; L. Baldwin; Steinar Dale; Alexander Domijan; Davild Larbalestier; Hui Li; Peter McLaren; Sastry Pamidi; Horatio Rodrigo; Michael Steurer

2010-03-31

463

Biomass power for rural development. Technical progress report, April 1, 1997--June 30, 1997  

SciTech Connect

Detailed task progress reports and schedules are provided for the DOE/USDA sponsored Biomass Power for Rural Development project. The focus of the project is on developing commercial energy crops for power generation by the year 2000. The New York based Salix Consortium project is a multi-partner endeavor, implemented in three stages. Phase-I, Final Design and Project Development, will conclude with the preparation of construction and/or operating permits, feedstock production plans, and contracts ready for signature. Field trials of willow (Salix) have been initiated at several locations in New York (Tully, Lockport, King Ferry, La Fayette, Massena, and Himrod) and co-firing tests are underway at Greenidge Station (NYSEG) and Dunkirk Station (NMPC). Phase-H of the project will focus on scale-up of willow crop acreage, construction of co-firing facilities at Dunkirk Station (NMPC), and final modifications for Greenidge Station. Cofiring willow is also under consideration for GPU`s Seward Station where testing is under way. There will be an evaluation of the energy crop as part of the gasification trials occurring at BED`s McNeill power station. Phase-III will represent fullscale commercialization of the energy crop and power generation on a sustainable basis.

Neuhauser, E.

1997-08-01

464

Development of model reference adaptive control theory for electric power plant control applications  

SciTech Connect

The scope of this effort includes the theoretical development of a multi-input, multi-output (MIMO) Model Reference Control (MRC) algorithm, (i.e., model following control law), Model Reference Adaptive Control (MRAC) algorithm and the formulation of a nonlinear model of a typical electric power plant. Previous single-input, single-output MRAC algorithm designs have been generalized to MIMO MRAC designs using the MIMO MRC algorithm. This MRC algorithm, which has been developed using Command Generator Tracker methodologies, represents the steady state behavior (in the adaptive sense) of the MRAC algorithm. The MRC algorithm is a fundamental component in the MRAC design and stability analysis. An enhanced MRC algorithm, which has been developed for systems with more controls than regulated outputs, alleviates the MRC stability constraint of stable plant transmission zeroes. The nonlinear power plant model is based on the Cromby model with the addition of a governor valve management algorithm, turbine dynamics and turbine interactions with extraction flows. An application of the MRC algorithm to a linearization of this model demonstrates its applicability to power plant systems. In particular, the generated power changes at 7% per minute while throttle pressure and temperature, reheat temperature and drum level are held constant with a reasonable level of control. The enhanced algorithm reduces significantly control fluctuations without modifying the output response.

Mabius, L.E.

1982-09-15

465

A study of non-grid-connected wind power industry development path choice based on new institutional economics  

Microsoft Academic Search

Non-grid-connected wind power is a brand new field of wind power development, which is closely related to national policy. In its future growth, national policy, or institutional factors will directly influence its direction of development. Employing new institutional economics' basic theories, this paper analyzes non-grid-connected wind power's evolution and development path choice from the view of institutional innovation and institutional

Yong Fang; Jing Li

2010-01-01

466

Making european-style community wind power development work in theUnited States  

SciTech Connect

Once primarily a European phenomenon, community wind power development--defined here as one or more locally owned, utility-scale wind turbines interconnected on either the customer or utility side of the meter--is gaining a foothold in an increasing number of states throughout the United States. This article describes the various policies and incentives that Minnesota, Wisconsin, Iowa, and Massachusetts are using to support community wind power development, and how state and federal support influences the types of projects and ownership structures that are being developed. Experience in these states demonstrates that, with an array of incentives and creative financing schemes targeted at community-scale projects, there are opportunities to make community wind work in the United States.

Bolinger, Mark A.

2004-04-26

467

An initial development of a methodology for siting solar power plants  

SciTech Connect

The objective of the research described in this report is to develop a methodology for siting solar power plants and to transfer this siting technology to utilities and to solar industries. This report describes the initial development of this methodology, which makes use of SERI's Geographic Information and Data Analysis System (GIDAS). GIDAS functions include data entry, geographic and parameter transformations, image and geographic information analyses, and the production of various output products, including color and black-and-white composite maps and tabular summaries of analytical results. The composite maps in the report show, among other things, direct normal insolation, land use and land cover, land management, and proximity to load centers, all of which are taken into account in selecting suitable sites for solar power plants, using a cost/benefit approach. The methodology is very promising, and awaits only some improvements in insolation data and in current data gases to be developed more fully. 11 refs., 16 figs., 4 tabs.

Maxwell, E.L.; Rymes, M.D.

1987-11-01

468

Thermoelectric Alloys and Devices for Radioisotope Space Power Systems: State of the Art and Current Developments  

SciTech Connect

Lead telluride and silicon germanium type alloys have served over the past several decades as the preferred thermoelectric conversion materials for U. S. radioisotope thermoelectric generator (RTG) power systems for planetary deep space exploration missions. The Pioneer missions to Jupiter and Jupiter/Saturn and the Viking Mars Lander missions employed TAGS-2N (lead and germanium telluride derivatives) power conversion devices. Since 1976, silicon germanium (SiGe) alloys, incorporated into the unicouple device, have evolved as the thermoelectric materials of choice for U. S. RTG powered space missions. These include the U. S. Air Force Lincoln Experimental Satellites 8 & 9 for communications, in 1976, followed in 1977 by the National Aeronautics and Space Administration Voyager 1 and 2 planetary missions. In 1989, advanced SiGe RTGs were used to power the Galileo exploration of Jupiter and, in 1990, will be used to power the Ulysses investigation of the Sun. In addition, SiGe technology has been chosen to provide RTG power for the 1995 Comet Rendezvous and Asteroid Flyby mission and the 1996 Cassini Saturn orbiter mission. Summaries of the flight performance data for these systems are presented.; Current U. S. Department of Energy thermoelectric development activities include (1) the development of conversion devices based on hi-density, close packed couple arrays and (2) the development of improved performance silicon germanium type thermoelectric materials. The silicon germanium type "multicouple", being developed in conjunction with the Modular RTG program, is discussed in a companion paper. A lead telluride type close-packed module, discussed herein, offers the promise of withstanding high velocity impacts and, thus, is a candidate for a Mars Penetrator application.; Recent projects sponsored by the U. S. Department of Energy, including the Improved Thermoelectric Materials and Modular Radioisotope Thermoelectric Generator programs, have shown that improvements in silicon germanium thermoelectric energy conversion capabilities of at least 50 percent can be achieved by tailoring the characteristics of the silicon germanium alloy materials and devices. This paper compares the properties and characteristics of the SiGe alloys now being developed with those used in the operational space power system.

Barnett, W.; Dick, P.; Beaudry, B.; Gorsuch, P.; Skrabek, E.

1989-01-01

469

Report on Performance of Prototype Dynatronix Power Supplies Developed Under a Phase I DOE SBIR  

SciTech Connect

The purpose of this study is to evaluate the prototype power supplies fabricated by Dynatronix, Inc. This project supports the advancement of electroforming capabilities to produce ultra-high purity copper. Ultra-high purity copper is an essential material used for a range of current and future fundamental nuclear physics programs such as the MAJORANA DEMONSTRATOR. The Mach 30 power supplies are a new design built to the specifications from the requirements of Pacific Northwest National Laboratory (PNNL) with regard to timing, voltage, current output, and the required tolerances. The parameters used in these tests were developed empirically over a number of years based on a combination of thermodynamic and kinetics of the electroplating process. The power supplies were operated in a typical cleanroom environment for the production electroforming at PNNL. The units that were received by PNNL in July, 2010 have performed satisfactorily and have demonstrated short term durability.

Hoppe, Eric W.; Merriman, Jason H.

2011-03-01

470

Satellite power system concept development and evaluation program system definition technical assessment report  

SciTech Connect

The results of the system definition studies conducted by NASA as a part of the Department of Energy/National Aeronautics and Space Administration SPS Concept Development and Evaluation Program are summarized. The purpose of the system definition efforts was to identify and define candidate SPS concepts and to evaluate the concepts in terms of technical and cost factors. Although the system definition efforts consisted primarily of evaluation and assessment of alternative technical approaches, a reference system was also defined to facilitate economic, environmental, and societal assessments by the Department of Energy. This reference system was designed to deliver 5 GW of electrical power to the utility grid. Topics covered include system definition; energy conversion and power management; power transmission and reception; structures, controls, and materials; construction and operations; and space transportation.

Not Available

1980-12-01

471

Fitting Russian power units with automated control systems: Development trends, problems, and prospects  

NASA Astrophysics Data System (ADS)

The main lines in the development of systems for automated control of Russian power equipment, namely, improvement of technical means and enhancing the level to which technological processes are automated, are discussed. Ways for solving problems concerned with construction of modern automated process control systems, such as use of intellectual field devices, methods for implementing the controller level in a distributed configuration, and integration of local automatic control systems are analyzed. Positive experience gained with achieving a high level of fitting new combined-cycle power plants with automatic control systems and with modernizing the monitoring and control systems of existing traditional equipment is presented. Factors that in some cases do not allow a real technological effect to be obtained from the use of microprocessor process control systems in retrofitted power units are pointed out.

Bilenko, V. A.; Grekhov, L. L.; Sviderskii, A. G.

2012-10-01

472

Development and validation of instantaneous risk model in nuclear power plant's risk monitor  

SciTech Connect

The instantaneous risk model is the fundament of calculation and analysis in a risk monitor. This study focused on the development and validation of an instantaneous risk model. Therefore the principles converting from the baseline risk model to the instantaneous risk model were studied and separated trains' failure modes modeling method was developed. The development and validation process in an operating nuclear power plant's risk monitor were also introduced. Correctness of instantaneous risk model and rationality of converting method were demonstrated by comparison with the result of baseline risk model. (authors)

Wang, J.; Li, Y.; Wang, F.; Wang, J.; Hu, L. [Inst. of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei, Anhui, 230031 (China); School of Nuclear Science and Technology, Univ. of Science and Technology of China, Hefei, Anhui, 230031 (China)

2012-07-01

473

Innovation on Energy Power Technology (21)Why is the EMTP Developed?  

NASA Astrophysics Data System (ADS)

The Electro Magnetic Transients Program (EMTP) is originated from the Ph. D. thesis of H. W. Dommel supervised by Prof. Prinz in 1962 at the Technical University of Munick. This article describes why and how the EMTP was developed in the Bonneville Power Administration, US Department of Interia (Department of Energy since 1978). Also some stories behind the EMTP in the early stage of its development are described, as the author being involved in a transient simulation since 1965 and being one of original EMTP developers.

Ametani, Akihiro

474

Development of wireless controller area network using low cost and low power consumption ARM microcontroller for solar car application  

Microsoft Academic Search

In this paper, a wireless controller area network (CAN) was developed using low cost microcontroller. The system is low cost and low power consumption for CAN application in order