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Last update: November 12, 2013.
1

Actively pressurized engine cooling system  

Microsoft Academic Search

This patent describes a method of operating an engine cooling system of the type comprising a heat exchanger, means for circulating a liquid coolant through coolant passages in the engine and through the heat exchanger, and means for adjusting the cooling effect of the heat exchanger on the fluid, the method comprising the steps of: adjusting the heat transfer capacity

Scarselletta

1988-01-01

2

Cooling system for automotive engine  

Microsoft Academic Search

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

Hirano

1986-01-01

3

Boiling liquid engine cooling system  

Microsoft Academic Search

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

N. Miura; Y. Hayashi

1987-01-01

4

System for cooling internal combustion engines  

Microsoft Academic Search

A system is described for cooling internal combustion engines comprising: a main cooling water line for circulating water through a radiator; a by-pass cooling water line diverging from the main cooling water line and circulating water without passing through the radiator; a motor-driven valve mechanism positioned for mixing the water from the main cooling water line with the water from

M. Nishikata; M. Nozaki

1987-01-01

5

40 CFR 89.329 - Engine cooling system.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Engine cooling system. 89.329 Section 89.329 Protection...Test Equipment Provisions § 89.329 Engine cooling system. An engine cooling system is required with sufficient capacity...

2013-07-01

6

40 CFR 91.307 - Engine cooling system.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Engine cooling system. 91.307 Section 91.307 Protection...Test Equipment Provisions § 91.307 Engine cooling system. An engine cooling system is required with sufficient...

2013-07-01

7

40 CFR 90.307 - Engine cooling system.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Engine cooling system. 90.307 Section 90.307 Protection...Test Equipment Provisions § 90.307 Engine cooling system. An engine cooling system is required with sufficient...

2013-07-01

8

The development of engine evaporative cooling system  

Microsoft Academic Search

A fundamental heat transfer study has been conducted on a new engine cooling system in which heat is removed from the engine through the boiling process in the water jacket and is radiated to the air through a condenser. By carrying out a basic experiment using a model boiler as a substitute for the cylinder heat water jacket and a

T. Kubozuka; N. Ogawa; Y. Hirano; Y. Hayashi

1987-01-01

9

Gas turbine engine component cooling system  

SciTech Connect

In a gas turbine engine including a compressor supported in an annular frame, the frame having a front frame portion extending upstream of the compressor, the front frame having radially inner and outer surfaces, the inner surface defining a flowpath to the compressor, a system is described for cooling an engine component which consists of: the front frame including an aperture extending therethrough; a housing for mounting the engine component therein, including a plurality of heat transfer fins extending outwardly therefrom; and the housing being mounted to the radially outer surface of the front frame so that the heat transfer fins extend through the aperture and into the flowpath.

Colman, M.E.; Goeller, R.E.

1986-09-02

10

Cooling system for automotive engine or the like  

Microsoft Academic Search

An internal combustion engine is described having a structure subject to high heat flux; and a cooling system for removing heat from the engine. In addition, a method is described of cooling an internal combustion engine using a cooling system comprising the steps of: introducing liquid coolant into a cooling circuit which includes a coolant jacket formed about structure of

Kubozuka

1987-01-01

11

Cooling system for internal combustion engines  

SciTech Connect

A cooling system for an internal combustion engine is described comprising: a head-side water jacket and a block-side water jacket made independent of each other; and a radiator and a cooling fan shared between the two water jackets. The improvement comprises: a first cooling water conduit for connecting the outlet of the head-side water jacket and the inlet of the radiator; a mixing valve having two water inlets and one water outlet; a second cooling water conduit for connecting one of the water inlets of the mixing valve and the outlet of the radiator; a third conduit for connecting the water outlet of the block-side water jacket and the remaining one of the water inlets of the mixing valve; a water pump, a fourth conduit branched midway from the second conduit and connected with the water inlet of the head-side water jacket; an auxiliary water pump; a fifth conduit branched midway from the third conduit and connected with the first conduit; one-way valve; and a control unit for controlling the mixing ratio of the mixing valve, the displacement of the auxiliary water pump and the operation of the cooling fan.

Itakura, M.

1988-07-26

12

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes an internal combustion engine having a structure subject to high heat flux, a cooling system comprising: (a) a cooling system for removing heat from the structure, the cooling system comprising: a coolant jacket disposed about the structure and into which coolant is introduced in liquid form and permitted to boil; a radiator in which coolant vapor is

N. Ogawa; T. Kubozuka; Y. Hirano

1986-01-01

13

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes an internal combustion engine a structure subject to high heat flux, and a cooling system for removing heat from the structure, the cooling system comprising: a cooling circuit including: a coolant jacket formed about the structure and into which coolant is introduced in liquid form and permitted to boil; a radiator in which gaseous coolant is condensed

Kubozuka

1986-01-01

14

Cooling system for an automobile engine  

SciTech Connect

This patent describes a cooling system for an automobile engine having a water jacket, a radiator, a water pump, and a thermostat housing, comprising: a first passage communicating an upper outlet of the water jacket with an inlet of the radiator provided at a lower portion, a second passage communicating an upper outlet of the radiator with an inlet of the water pump and having the thermostat housing at the upstream of the pump; an outlet of the pump communicated with a lower inlet of the water jacket; a bypass connected between the first passage and the thermostat housing; a thermostat comprising a thermo-sensitive device, a first valve and a second valve disposed in the thermostat housing both the valves operatively connect to the thermo-sensitive device, so that the first valve closes the second passage and the second valve opens the bypass; the thermo-sensitive device disposes in the bypass and the first and second valves operate by the operation of the thermo-sensitive device.

Kuze, Y.

1987-07-14

15

Expanding the limits on engines and vehicles imposed by circulating liquid engine cooling systems  

Microsoft Academic Search

The operational limits of the cooling system for a liquid cooled internal combustion engine are also limits on the engine's power, fuel economy and air quality possibilities. When coolant temperatures in a traditional liquid cooled engine approach the saturation temperature of water, optimum engine settings must be degraded to prevent detonation. This paper discusses the nature of the limits imposed

J. W. Evans; J. T. Light

1986-01-01

16

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes an internal combustion engine having a structure subject to high heat flux, a cooling system comprising: (a) a cooling circuit for removing heat from the structure, the cooling circuit comprising: a coolant jacket disposed about the structure and into which coolant is introduced in liquid form and permitted to boil; a radiator in which coolant vapor is

K. Fujigaya; N. Ogawa; H. Shimonosono; Y. Minezaki

1986-01-01

17

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes an internal combustion engine: a structure subject to high heat flux a cooling system for removing heat from the structure, the system comprising: (a) a cooling circuit including: (i) a coolant jacket formed about the structure and into which coolant is introduced in liquid form and permitted to boil; (ii) a radiator in which gaseous coolant is

Y. Hayashi; Y. Murakami

1987-01-01

18

Detail exterior view looking southwest of gas cooling system. Engine ...  

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

Detail exterior view looking southwest of gas cooling system. Engine house is shown in right background. - Burnsville Natural Gas Pumping Station, Saratoga Avenue between Little Kanawha River & C&O Railroad line, Burnsville, Braxton County, WV

19

Boiling liquid cooling system for internal combustion engines  

Microsoft Academic Search

This patent describes a cooling system for an internal combustion engine, the engine including a coolant jacket, and having a condenser and conduit means for conducting coolant vapor from substantially the highest zone in the coolant jacket to the condenser and for returning coolant condensate to the coolant jacket. The condensate is characterized in that the coolant is a high

1986-01-01

20

Gas turbine engine component cooling system  

SciTech Connect

An electronic control apparatus is described which is positionable in a cooling fluid environment comprising: a housing for containing an electronic control having an outer surface; a plurality of heat transfer fins extending from the outer surface of the housing and positionable in the cooling fluid environment for cooling the fins and housing; environmental sensor means disposed in and connected to the housing adjacent to the heat transfer fins and being connectible to the electronic control; and the sensor means being positioned in the housing in flow communication with the cooling fluid flowable over the fins for sensing a characteristic of primarily the cooling fluid environment.

Colman, M.E.; Goeller, R.E.

1986-07-22

21

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes a cooling system for an internal combustion engine. This system comprises: a coolant jacket in which coolant is boiled and a coolant vapor produced; a radiator in fluid communication with the coolant jacket and in which the coolant vapor produced in the coolant jacket is condensed to its liquid form; and a vapor manifold interposed between the

Shimonosono

1987-01-01

22

Cooling system for automotive engine or the like  

Microsoft Academic Search

A cooling system is described for an internal combustion engine having a structure subject to high heat flux and a lubricant system, comprising: a coolant jacket disposed about the structure and into which coolant is introduced in liquid form and permitted to boil; a radiator in which gaseous coolant is condensed to its liquid state; a vapor transfer conduit leading

Hayashi

1986-01-01

23

Cooling system for automotive engine or the like including coolant return pump back-up arrangement  

Microsoft Academic Search

This patent describes, in an automotive vehicle having a passenger compartment and an engine compartment; an engine, the engine being disposed in the engine compartment and having structure which is subject to high heat flux; a cooling system for removing heat from the engine; and a passenger compartment heating arrangement incorporated with the cooling system, the cooling system and the

N. Ogawa; T. Kubozuka

1986-01-01

24

Simulation of Engine Cooling System Based on AMESim  

Microsoft Academic Search

On a basis of a 4-cylinders gasoline engine the steady heater transfer and coolant flow in the cooling system were simulated at the rated operation mode in the model. Comparison between simulation and measurement on the test bench shows that the simulated results are in good accord with experimental data and the deviation is less than 2.4%, thus the model

Gu Ning; Ni Ji-Min

2009-01-01

25

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes an internal combustion engine having a structure subject to high heat flux a cooling system comprising: a coolant jacket disposed about the structure and into which coolant is introduced in liquid form, permitted to boil and discharged in gaseous form; a radiator in fluid communication with the coolant jacket which receives coolant vapor produced therein and condenses

Y. Hirano; T. Kubozuka

1988-01-01

26

Application of system engineering processes to analyze and predict engine cooling fan system noise for off-highway machines  

Microsoft Academic Search

System Engineering processes were applied to create a Cooling Fan System Noise Analysis Tool for a back-hoe loader machine. The Cooling Fan System Noise Analysis Tool combined elements of aeroacoustic theory, Fan Law, sound power measurements and particle image velocimetry into a single computer analysis tool. The cooling fan system consisted of a cooling fan, multiple radiators in front of

Christopher P. Masini; J. Adin Mann

2005-01-01

27

Cooling system for automotive engine or the like  

Microsoft Academic Search

A method is described of cooling an internal combustion engine comprising the steps of: introducing liquid coolant into a cooling circuit which includes a coolant jacket formed about structure of the engine subject to high heat flux; permitting the coolant in the coolant jacket to boil and produce coolant vapor; transferring the coolant vapor to a radiator which defines a

Y. Hirano; T. Kubozuka

1986-01-01

28

Cooling system for vertical shaft V-type engine  

SciTech Connect

A cooling system in a V-type engine is described having a crankcase with cylinders arranged horizontally and so as to form a V therebetween, a bottom wall attached to the crankcase at a level lower than the cylinders, and a vertically arranged crankshaft substantially at the junction of the V. The cooling system consists of: a coolant pump having a pump shaft arranged parallel to the crankshaft, within the V spaced from the junction, and spaced from the cylinders vertically in axial direction of the crankshaft; the coolant pump being joined to a first face of the bottom wall of the crankcase and having outlet passages extending orthogonal to the crankshaft and ending at the first face of the bottom wall, separate cooling jackets mounted at the cylinders and having therein separate inlets at a second face of the bottom wall of the crankcase, and intermediate coolant passages provided within the bottom wall between the first and second faces and joining the outlet passages to the inlets of the cooling jackets.

Tamba, S.; Fukui, N.; Miguchi, A.

1988-07-12

29

AUTOMOTIVE DIESEL MAINTENANCE 1. UNIT IV, MAINTAINING THE COOLING SYSTEM--DETROIT DIESEL ENGINES.  

ERIC Educational Resources Information Center

|THIS MODULE OF A 30-MODULE COURSE IS DESIGNED TO DEVELOP AN UNDERSTANDING OF THE OPERATION AND MAINTENANCE OF THE DIESEL ENGINE COOLING SYSTEM. TOPICS ARE PURPOSE OF THE COOLING SYSTEM, CARE MAINTENANCE OF THE COOLING SYSTEM, COOLING SYSTEM COMPONENTS, AND TROUBLESHOOTING TIPS. THE MODULE CONSISTS OF A SELF-INSTRUCTIONAL BRANCH PROGRAMED TRAINING

Human Engineering Inst., Cleveland, OH.

30

Fluid heating attachment for automobile engine cooling systems  

SciTech Connect

This patent describes a fluid heating attachment for automobile engines cooling systems with a device for warming the engine and prewarming the washer fluid when the engine is not running, and for also warming the washer fluid when the engine is running. The attachment consists of: a housing having a heating chamber and having an inlet and an outlet connected in communication with the chamber, the housing inlet and outlet being connected in communication with the radiator outlet hose and space heater supply hose, respectively, thus to connect the chamber in the cooling system as part of the flow path of coolant circulated through the system and thereby fill the chamber with the circulated coolant; a tubular conduit means for windshield washer fluid, supported within the chamber in position to be substantially wholly immersed in the coolant filling the chamber; the conduit means including inflow and outflow ends projecting exteriorly of the chamber and respectively connected to the inlet and outlet end portions of the windshield washer fluid supply line to provide a heated supply of washer fluid for the spray head; and heating means within the chamber for elevating the temperature of the coolant and the washer fluid therein, the heating means comprising an electrical heating element wholly immersed in the coolant within the chamber in laterally spaced relation to the conduit means and adapted for connection to a supply of house current, from the housing to the space heater supply hose and into the upper end of the block, and thereafter downwardly through the block to the lower end thereof to displace and force upwardly coolant that is of a lower temperature.

Linker, R.E.; Linker, M.P.

1986-03-11

31

Heat removal performance of auxiliary cooling system for the high temperature engineering test reactor during scrams  

Microsoft Academic Search

The auxiliary cooling system of the high temperature engineering test reactor (HTTR) is employed for heat removal as an engineered safety feature when the reactor scrams in an accident when forced circulation can cool the core. The HTTR is the first high temperature gas-cooled reactor in Japan with reactor outlet gas temperature of 950C and thermal power of 30 MW.

Takeshi Takeda; Yukio Tachibana; Tatsuo Iyoku; Satsuki Takenaka

2003-01-01

32

Cooling system for automotive engine or the like  

Microsoft Academic Search

A method is described of cooling an internal combustion engine which has a structure subject to high heat flux, comprising: introducing liquid coolant into a coolant jacket disposed about the structure; permitting the coolant to boil and produce coolant vapor; condensing the vapor produced in the coolant jacket in a radiator; sensing the temperature of the coolant in the coolant

Hayashi

1987-01-01

33

Cooling system for automotive engine or the like  

Microsoft Academic Search

A method is described for cooling an internal combustion engine having a structure subject to high heat flux. The method comprises introducing liquid coolant containing an anti-freeze into an coolant jacket disposed about the heated structure; permitting the liquid coolant to boil and produce coolant vapor; condensing the vapor produced in the coolant jacket in a radiator; circulating a portion

Hirano

1987-01-01

34

Engineering and cost comparison of three different all-dry cooling systems  

Microsoft Academic Search

Results of a detailed engineering and cost study of three different all-dry cooling systems to assess the potential for reducing the cost of all-dry cooling for steam electric power plants are described. The three types of cooling systems considered were: state-of-the-art (SOA) dry cooling system; with a conventional surface condenser, and water used to condense the steam is passed through

B. C. Fryer; D. J. Braun; D. W. Faletti; L. E. Wiles

1976-01-01

35

Externally cooled absorption engine  

Microsoft Academic Search

An externally cooled, absorption engine apparatus and method are described, the apparatus including a closed cycle system having a first fluid and a second fluid, the first fluid constituting a working fluid and having a relatively lower boiling point while the second fluid constitutes a solvent for the first fluid and has a relatively higher boiling point and a relatively

Brinkerhoff

1981-01-01

36

Hermetically sealed, relatively low pressure cooling system for internal combustion engines and method therefor  

Microsoft Academic Search

This patent describes a hermetically sealed, relatively low pressure cooling system for internal combustion engines including a thermostat which opens at a predetermined engine operating temperature, comprising: a hermetically sealed radiator having a filling neck located in the top portion of the radiator, a nonpressurized cap in sealed relationship with the filling neck; a small expansion reservoir for liquid coolant

Howcroft

1988-01-01

37

Performance Assessment of a Desiccant Cooling System in a CHP Application with an IC Engine  

SciTech Connect

Performance of a desiccant cooling system was evaluated in the context of combined heat and power (CHP). The baseline system incorporated a desiccant dehumidifier, a heat exchanger, an indirect evaporative cooler, and a direct evaporative cooler. The desiccant unit was regenerated through heat recovery from a gas-fired reciprocating internal combustion engine. The system offered sufficient sensible and latent cooling capacities for a wide range of climatic conditions, while allowing influx of outside air in excess of what is typically required for commercial buildings. Energy and water efficiencies of the desiccant cooling system were also evaluated and compared with those of a conventional system. The results of parametric assessments revealed the importance of using a heat exchanger for concurrent desiccant post cooling and regeneration air preheating. These functions resulted in enhancement of both the cooling performance and the thermal efficiency, which are essential for fuel utilization improvement. Two approaches for mixing of the return air and outside air were examined, and their impact on the system cooling performance and thermal efficiency was demonstrated. The scope of the parametric analyses also encompassed the impact of improving the indirect evaporative cooling effectiveness on the overall cooling system performance.

Jalalzadeh-Azar, A. A.; Slayzak, S.; Judkoff, R.; Schaffhauser, T.; DeBlasio, R.

2005-04-01

38

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes an internal combustion chamber: a radiator; a coolant jacket in which coolant is boiled and the vapor produced fed to the radiator; a first sensor for sensing a first engine operation parameter the first engine operation parameter being other than the temperature or pressure in either of the coolant jacket or the radiator; a device responsive to

Y. Hayashi; T. Tamazawa

1987-01-01

39

Cooling system for automotive internal combustion engine or the like  

Microsoft Academic Search

This patent describes a method of removing heat from heated structure of an internal combustion engine comprising the steps of: introducing liquid coolant into a coolant jacket disposed about the heated structure of the engine; permitting the liquid coolant to boil and produce coolant vapor; condensing the coolant vapor generated by the boiling of the liquid coolant in a radiator

Hayashi

1987-01-01

40

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes a method of cooling a device, the steps of: boiling a liquid coolant in a coolant jacket to produce a vapor; condensing the vapor produced in the boiling step, in a radiator; increasing the boiling point of the liquid coolant by reducing the heat exchange capacity of the radiator in the event that the rate of condensation

Hayashi

1987-01-01

41

Cooling system for automotive engine or the like  

Microsoft Academic Search

This patent describes a method of a coolant an arrangement, the steps of: boiling a liquid coolant in a coolant jacket; condensing the vapor produced in the boiling step, in a radiator; maintaining the radiator essentially empty of liquid coolant when the engine is warmed-up and running so as to maximize the surface area available for coolant vapor to release

Hayashi

1986-01-01

42

Aft entry cooling system and method for an aircraft engine  

SciTech Connect

This patent describes a gas turbine engine having a longitudinal axis and an air compressor, a combustor, and tandemly-arranged high and low pressure turbines disposed in a serial arrangement along the longitudinal axis. It comprises: stationary means disposed aft of the discharge end of the low pressure turbine and extending radially outwardly relative to the longitudinal axis; and an air flow circuit connected to the interstage portion of the air compressor and to the stationary means.

Lee, C.P.; Carlson, C.K.; Shelton, M.L.; Rieck, H.P. Jr.; Hauser, A.A.

1992-08-04

43

SOLERAS Program: engineering field test of a solar cooling system. Phase I and II  

SciTech Connect

The rationale for selecting the engineering field test site and the building cooling requirements are described. Descriptions of the Phase I activities are presented and descriptions of the overall cooling system and its major subsystems and components are provided. The preliminary design analyses conducted to select collector/storage, chiller module and thermal distribution components; operating features and estimated system performance are included. Economic analyses and the results obtained are described including an assessment of the commercialization potential for the solar cooling system. Phase II activities are presented and detailed design, construction and installation features of the solar system at the test site are described. Testing documentation is provided by the checkout and acceptance tests and their results are described.

Not Available

1982-06-01

44

AUTOMOTIVE DIESEL MAINTENACE 1. UNIT XV, I--MAINTAINING THE COOLING SYSTEM, CUMMINS DIESEL ENGINE, I--UNIT INSTALLATION--TRANSMISSION.  

ERIC Educational Resources Information Center

|THIS MODULE OF A 30-MODULE COURSE IS DESIGNED TO DEVELOP AN UNDERSTANDING OF THE FUNCTION AND MAINTENANCE OF THE DIESEL ENGINE COOLING SYSTEM AND THE PROCEDURES FOR TRANSMISSION INSTALLATION. TOPICS ARE (1) IMPORTANCE OF THE COOLING SYSTEM, (2) COOLING SYSTEM COMPONENTS, (3) EVALUATING COOLING SYSTEM FAILURES, (4) CARING FOR THE COOLING SYSTEM,

Human Engineering Inst., Cleveland, OH.

45

Fermilab electron cooling project: Engineering aspects of cooling section  

SciTech Connect

The Fermilab Electron Cooling project involves interacting a 4.3 MeV, 0.5 A DC electron beam with 8.9 GeV/c antiprotons in the FNAL Recycler Ring. This interaction occurs through a 20-meter long cooling section consisting of 10 solenoid modules. This cooling process would lead to an increase in the Tevatron collider luminosity needed to support RunIIb parameters. There are several important engineering aspects of this cooling section including: solenoid design, vacuum system design, magnetic shielding, support system, and alignment methods. Details of the engineering issues related to each of these areas is discussed.

Jerry R. Leibfritz et al.

2001-07-25

46

AUTOMOTIVE DIESEL MAINTENANCE 1. UNIT XXV, I--CATERPILLAR DIESEL ENGINE COOLING SYSTEM D-8 AND 824 MODELS, II--TIRES AND TIRE HARDWARE.  

ERIC Educational Resources Information Center

|THIS MODULE OF A 30-MODULE COURSE IS DESIGNED TO DEVELOP AN UNDERSTANDING OF THE OPERATION AND MAINTENANCE OF THE DIESEL ENGINE COOLING SYSTEM AND TO PROVIDE A DESCRIPTION OF HEAVY TIRES AND WHEELS USED ON DIESEL POWERED VEHICLES. TOPICS ARE (1) THEORY OF THE COOLING SYSTEM, (2) COOLING SYSTEM COMPONENTS, (3) MAINTENANCE TIPS (COOLING SYSTEM),

Minnesota State Dept. of Education, St. Paul. Div. of Vocational and Technical Education.

47

Gas turbine cooling system  

DOEpatents

A gas turbine engine (10) having a closed-loop cooling circuit (39) for transferring heat from the hot turbine section (16) to the compressed air (24) produced by the compressor section (12). The closed-loop cooling system (39) includes a heat exchanger (40) disposed in the flow path of the compressed air (24) between the outlet of the compressor section (12) and the inlet of the combustor (14). A cooling fluid (50) may be driven by a pump (52) located outside of the engine casing (53) or a pump (54) mounted on the rotor shaft (17). The cooling circuit (39) may include an orifice (60) for causing the cooling fluid (50) to change from a liquid state to a gaseous state, thereby increasing the heat transfer capacity of the cooling circuit (39).

Bancalari, Eduardo E. (Orlando, FL)

2001-01-01

48

46 CFR 182.420 - Engine cooling.  

Code of Federal Regulations, 2012 CFR

...than 12 passengers, a propulsion gasoline engine may be air cooled when in compliance...Project P-4. (d) An auxiliary gasoline engine may be air cooled when: ...e) A propulsion or auxiliary diesel engine may be air cooled or...

2012-10-01

49

46 CFR 182.420 - Engine cooling.  

Code of Federal Regulations, 2011 CFR

...than 12 passengers, a propulsion gasoline engine may be air cooled when in compliance...Project P-4. (d) An auxiliary gasoline engine may be air cooled when: ...e) A propulsion or auxiliary diesel engine may be air cooled or...

2011-10-01

50

Acoustic cooling engine  

DOEpatents

An acoustic cooling engine with improved thermal performance and reduced internal losses comprises a compressible fluid contained in a resonant pressure vessel. The fluid has a substantial thermal expansion coefficient and is capable of supporting an acoustic standing wave. A thermodynamic element has first and second ends and is located in the resonant pressure vessel in thermal communication with the fluid. The thermal response of the thermodynamic element to the acoustic standing wave pumps heat from the second end to the first end. The thermodynamic element permits substantial flow of the fluid through the thermodynamic element. An acoustic driver cyclically drives the fluid with an acoustic standing wave. The driver is at a location of maximum acoustic impedance in the resonant pressure vessel and proximate the first end of the thermodynamic element. A hot heat exchanger is adjacent to and in thermal communication with the first end of the thermodynamic element. The hot heat exchanger conducts heat from the first end to portions of the resonant pressure vessel proximate the hot heat exchanger. The hot heat exchanger permits substantial flow of the fluid through the hot heat exchanger. The resonant pressure vessel can include a housing less than one quarter wavelength in length coupled to a reservoir. The housing can include a reduced diameter portion communicating with the reservoir. The frequency of the acoustic driver can be continuously controlled so as to maintain resonance.

Hofler, Thomas J. (Los Alamos, NM); Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Santa Fe, NM); Migliori, Albert (Santa Fe, NM)

1988-01-01

51

Cooling system for automotive engine or the like including quick cold weather warm-up control  

Microsoft Academic Search

A method is described of cooling an internal combustion engine having a structure subject to high heat flux. The method comprises: introducing liquid coolant into a coolant jacket disposed about the structure; permitting the liquid coolant to boil and produce coolant vapor; condensing the coolant vapor produced in the coolant jacket to its liquid form in a radiator which is

H. Shimonosono; N. Ogawa; K. Fujigaya; Y. Minezaki

1987-01-01

52

TECHNICAL NOTE: Temperature control of an automotive engine cooling system utilizing a magneto-rheological fan clutch  

Microsoft Academic Search

In this note, the temperature control of an automotive engine cooling system is undertaken using a magneto-rheological (MR) fluid-based fan clutch (MR fan clutch in short). In order to achieve this goal, an appropriate size of controllable fan clutch using an MR fluid is firstly devised by considering the design parameters of a conventional fan clutch to reflect the practical

Eun-Seok Kim; Seung-Bok Choi; Young-Gee Park; Soojin Lee

2010-01-01

53

System Engineering Program Applicability for the High Temperature Gas-Cooled Reactor (HTGR) Component Test Capability (CTC)  

SciTech Connect

This white paper identifies where the technical management and systems engineering processes and activities to be used in establishing the High Temperature Gas-cooled Reactor (HTGR) Component Test Capability (CTC) should be addressed and presents specific considerations for these activities under each CTC alternative

Jeffrey Bryan

2009-06-01

54

SOLERAS program. Engineering field test of a solar cooling system. Final report  

SciTech Connect

A solar-powered air conditioning system was designed, constructed, and installed at a Phoenix, Arizona site whose climatic conditions approximate those of Saudi Arabia. The nominal 18 ton capacity Rankine cycle chiller system with hot and cold storage and conventional fan/coil delivery units was operated for two cooling seasons and met its design objectives.

Not Available

1983-05-01

55

14 CFR 33.21 - Engine cooling.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Engine cooling. 33.21 Section 33.21 Aeronautics...Construction; General § 33.21 Engine cooling. Engine design and construction must provide the necessary cooling under conditions in which the...

2013-01-01

56

System for cooling  

Microsoft Academic Search

A cooling system particularly suitable for use in the air conditioning of buildings is described. The system includes: (A) a cooling zone containing a conduit for cooling fluid, the conduit encountering the heat load, means in the conduit for propelling the fluid through the conduit, and cooling fluid in the conduit; (B) a refrigeration zone containing a closed refrigeration circuit

Wildfeuer

1981-01-01

57

A home-size solar-powered engine for cooling systems of generation of electricity  

Microsoft Academic Search

The paper outlines the steps taken in designing and constructing a solar-powered engine at the N.C. State University, to produce sufficient electricity from sunlight to meet the needs of the average N.C. resident, estimated at being approximately 1000 KWH\\/month. Attention is given to the component selection and assembly, and an examination of the preliminary system operating results is given. Four

F. O. Smetana; P. G. Bladen; T. B. Dameron III

1979-01-01

58

30 CFR 36.48 - Tests of surface temperature of engine and components of the cooling system.  

Code of Federal Regulations, 2013 CFR

... false Tests of surface temperature of engine and components of...48 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION...36.48 Tests of surface temperature of engine and components of...system. (a) The surface temperatures of the engine,...

2013-07-01

59

SOLERAS - Solar Cooling Engineering Field Tests Project: Carrier Corporation. Fabrication, testing and installation report: 53 kW solar absorption cooling system  

SciTech Connect

A 53 kW water cooled packaged solar absorption chiller was fabricated and tested. The generator shell and absorber shell had sight glasses added as a diagnostic device. The unit was modified so that a base suitable for mounting pumps, valves and associated piping was cantilevered from one end of the unit. The installation and start-up of the cooling system is outlined.

Not Available

1985-01-01

60

Transpiration Cooled Throat for Hydrocarbon Rocket Engines.  

National Technical Information Service (NTIS)

The objective for the Transpiration Cooled Throat for Hydrocarbon Rocket Engines Program was to characterize the use of hydrocarbon fuels as transpiration coolants for rocket nozzle throats. The hydrocarbon fuels investigated in this program were RP-1 and...

L. R. May W. M. Burkhardt

1991-01-01

61

Emergency Cooling System Flows.  

National Technical Information Service (NTIS)

Calculations of emergency cooling system (ECS) flows are required to complete the Flood Code documentation and validation. Only minimum ECS flows are required input to the FLOOD code for system safety analysis. ECS flows have not been documented since the...

J. H. Hinton

1985-01-01

62

Heat pipe cooling for scramjet engines. Final report  

SciTech Connect

Liquid metal heat pipe cooling systems have been investigated for the combustor liner and engine inlet leading edges of scramjet engines for a missile application. The combustor liner is cooled by a lithium-TZM molybdenum annular heat pipe, which incorporates a separate lithium reservoir. Heat is initially absorbed by the sensible thermal capacity of the heat pipe and liner, and subsequently by the vaporization and discharge of lithium to the atmosphere. The combustor liner temperature is maintained at 3400 F or less during steady-state cruise. The engine inlet leading edge is fabricated as a sodium-superalloy heat pipe. Cooling is accomplished by radiation of heat from the aft surface of the leading edge to the atmosphere. The leading edge temperature is limited to 1700 F or less. It is concluded that heat pipe cooling is a viable method for limiting scramjet combustor liner and engine inlet temperatures to levels at which structural integrity is greatly enhanced.

Silverstein, C.C.

1986-12-01

63

Engineered design of SSC cooling ponds  

SciTech Connect

The cooling requirements of the SSC are significant and adequate cooling water systems to meet these requirements are critical to the project`s successful operation. The use of adequately designed cooling ponds will provide reliable cooling for operation while also meeting environmental goals of the project to maintain streamflow and flood peaks to preconstruction levels as well as other streamflow and water quality requirements of the Texas Water Commission and the Environmental Protection Agency.

Bear, J.B.

1993-05-01

64

Emergency cooling system flows  

SciTech Connect

Calculations of emergency cooling system (ECS) flows are required to complete the Flood Code documentation and validation. Only minimum ECS flows are required input to the FLOOD code for system safety analysis. ECS flows have not been documented since the installation of improvements under Project S-1830 were completed. Calculated ECS flows from the booster pump and cooling water header are given for the loss of coolant (LOCA) and loss of pumping (LOPA) accidents. 7 refs., 2 tabs.

Hinton, J.H.

1985-03-13

65

Hydronic rooftop cooling systems  

DOEpatents

A roof top cooling unit has an evaporative cooling section that includes at least one evaporative module that pre-cools ventilation air and water; a condenser; a water reservoir and pump that captures and re-circulates water within the evaporative modules; a fan that exhausts air from the building and the evaporative modules and systems that refill and drain the water reservoir. The cooling unit also has a refrigerant section that includes a compressor, an expansion device, evaporator and condenser heat exchangers, and connecting refrigerant piping. Supply air components include a blower, an air filter, a cooling and/or heating coil to condition air for supply to the building, and optional dampers that, in designs that supply less than 100% outdoor air to the building, control the mixture of return and ventilation air.

Bourne, Richard C. (Davis, CA); Lee, Brian Eric (Monterey, CA); Berman, Mark J. (Davis, CA)

2008-01-29

66

SOLERAS - Solar Cooling Engineering Field Tests Project: United Technologies Research Center. Design guidelines for solar heating/cooling/power generation systems  

SciTech Connect

This report documents the methodology, design guidelines and analytical tools for the preliminary technical/economic evaluation of solar heating/cooling/power generation systems. In particular, it provides the theoretical framework, data bases and software tools for: determining the preliminary economic feasibility of solar-powered configurations compared with grid-supplied electric power and/or competing fossil fuels; selecting the optimum system configuration with respect to solar collector area and ''solar-side'' thermal storage capacity. Implementation of the methodology described in this report can be facilitated by the use of the accompanying IBM PC-compatible computer program ''SOLERAS''. This report represents the final task of the multi-year SOLERAS Program -- jointly sponsored by the US Department of Energy and the King Abdulaziz City for Science and Technology -- which involved the development and field-testing of a solar-powered cooling system in Phoenix, AZ. 11 refs., 37 figs.

Not Available

1987-01-01

67

Engine cooling fan and fan shrouding arrangement  

SciTech Connect

This patent describes a vehicle engine cooling fan and shrouding assembly for forcing cooling air through a radiator in which engine coolant is circulated comprising support means adjacent to the radiator, a fan shroud and mounting shell operatively secured to the support means adjacent to the radiator. The shell has a peripheral forwardly extending wall portion to provide an intake for air flowing through the radiator. The shell further has a generally cylindrical and rearwardly extending portion to provide a reduced dimensioned air ejector for the shell, spoke means extending inwardly from the air ejector, a fan drive motor supported by the spoke means extending axially into the shell, the motor having a rotatable output shaft extending outwardly therefrom toward the radiator and having a terminal end portion, and engine cooling fan operatively driven by the drive motor and rotatably mounted in the shell.

Longhouse, R.E.; Vona, N.

1987-08-11

68

Superconductor rotor cooling system  

DOEpatents

A system for cooling a superconductor device includes a cryocooler located in a stationary reference frame and a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with a rotating reference frame in which the superconductor device is located. A method of cooling a superconductor device includes locating a cryocooler in a stationary reference frame, and transferring heat from a superconductor device located in a rotating reference frame to the cryocooler through a closed circulation system external to the cryocooler. The closed circulation system interfaces the stationary reference frame with the rotating reference frame.

Gamble, Bruce B. (Wellesley, MA); Sidi-Yekhlef, Ahmed (Framingham, MA); Schwall, Robert E. (Northborough, MA); Driscoll, David I. (South Euclid, OH); Shoykhet, Boris A. (Beachwood, OH)

2002-01-01

69

Liquid Film Cooling in Rocket Engines.  

National Technical Information Service (NTIS)

A one-dimensional analytical model of liquid film cooling in rocket engine combustion chambers is developed and compared with existing data. The vapor generated at the liquid interface greatly decreases the convective heat flux and is treated as a 'transi...

W. M. Grisson

1991-01-01

70

Water cooled scavenged crankcase type otto internal combustion engine  

SciTech Connect

In a system for a water cooled scavenged crankcase type two-cycle internal combustion engine comprising: a heat reclaimation system for extracting heat from an engine jacket for heating water supplied form an add-on reservoir via a heat exchanger located within the engine cylinder cooling system, the water being subsequently additionally heated by an exhaust pipe type heat exchanger to a superheated steam state and thence conveyed by a conduit to a steam lubricator for adjustably conveying in variably timed spaced succession intervals of regulated droplets of high viscous oil, fortified with adde graphite and tallow enrichment lubricant ingredients, and thence conveying such by steam at atmospheric pressure into an intake manifold which receives a carbureted air/fuel mixture into the crankcase via a manually operated auxiliary air intake device and way check valve and fire screen, due to suction effect of the piston up stroke action of the piston during engine operation.

Bidwell, H.

1988-10-25

71

Passive containment cooling system  

DOEpatents

A passive containment cooling system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is disposed inside the containment vessel, and a gravity driven cooling system (GDCS) pool is disposed above the wetwell pool in the containment vessel and is vented to the drywell. An isolation pool is disposed above the GDCS pool and includes an isolation condenser therein. The condenser has an inlet line disposed in flow communication with the drywell for receiving the non-condensable gas along with any steam released therein following a loss-of-coolant accident (LOCA). The condenser also has an outlet line disposed in flow communication with the drywell for returning to the drywell both liquid condensate produced upon cooling of the steam and the non-condensable gas for reducing pressure within the containment vessel following the LOCA. 1 figure.

Billig, P.F.; Cooke, F.E.; Fitch, J.R.

1994-01-25

72

Cooling Floor AC Systems  

NASA Astrophysics Data System (ADS)

The present HVAC equipments for the residential buildings in the Hot-summer-and-Cold-winter climate region are still at a high energy consuming level. So that the high efficiency HVAC system is an urgently need for achieving the preset government energy saving goal. With its advantage of highly sanitary, highly comfortable and uniform of temperature field, the hot-water resource floor radiation heating system has been widely accepted. This paper has put forward a new way in air-conditioning, which combines the fresh-air supply unit and such floor radiation system for the dehumidification and cooling in summer or heating in winter. By analyze its advantages and limitations, we found that this so called Cooling/ Heating Floor AC System can improve the IAQ of residential building while keep high efficiency quality. We also recommend a methodology for the HVAC system designing, which will ensure the reduction of energy cost of users.

Jun, Lu; Hao, Ding; Hong, Zhang; Ce, Gao Dian

73

Turbine engine with air and steam cooling  

SciTech Connect

This patent describes a turbine engine. It comprises: a compressor for introducing compressed air into the engine; a combustor downstream from the compressor, the combustor comprising a casing, and a liner dispersed within and spaced apart from the casing such as to form a mixing region between the liner and the casing, wherein the liner forms a combustor inlet at the upstream end of the combustor and the mixing region receives at least a portion of the compressed air, and the liner is formed such as to allow flow between the mixing region and the combustion zone; a turbine downstream from the combustor. The turbine having a cooling passage therein; means for introducing steam into the mixing region downstream of the combustor inlet such as to form an air and stream mixture; and means for introducing the air and stream mixture into the cooling passage.

Hines, W.R.

1991-01-08

74

Integrated natural gas engine cooling jacket vapor compressor program  

NASA Astrophysics Data System (ADS)

A unique, alternative cogeneration system was designed that provides an industrial or commercial energy user with high pressure steam and electricity directly from a packaged cogeneration system. The Integrated Gas Engine Vapor Compression System concept includes an engine-generator set and a twin screw compressor that are mechanically integrated with the engine. The gas-fueled engine is ebulliently cooled, thus, allowing its water jacket heat to be recovered in the form of low-pressure steam. The steam is then compressed by the steam compressor to higher pressure, and when combined with the high pressure steam generated in the engine's exhaust gas boiler, it provides the end user with a more usable thermal energy source. Various aspects of the program are discussed.

Dibella, F. A.

1990-08-01

75

District cooling engineering and design program  

SciTech Connect

The operation and performance of a system using large commercial heat pumps to heat and cool two public buildings are reported. One of the buildings houses local government offices and the other the jail. The system uses the underground salt water at the site as the energy exchange medium. Included are: the operations summary, system performance, operating procedures, and operating modes. (MHR)

Not Available

1992-09-01

76

Cryo Utilities Room Cooling System  

Microsoft Academic Search

Many of the mechanical equipment failures at the Laboratory are due to the loss of cooling water. In order to insure the proper operating temperatures and to increase the reliability of the mechanical equipment in the D0 Cryo Utilities Room it is necessary to provide an independent liquid cooling system. To this end, an enclosed glycoVwater cooling system which transfers

G. S. Ball

1989-01-01

77

Liquid metal cooled nuclear reactors with passive cooling system  

DOEpatents

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of cooling medium flow circuits which cooperate to remove and carry heat away from the fuel core upon loss of the normal cooling flow circuit to areas external thereto.

Hunsbedt, Anstein (Los Gatos, CA); Fanning, Alan W. (San Jose, CA)

1991-01-01

78

Modelling and validation of a gas engine heat pump working with R410A for cooling applications  

Microsoft Academic Search

Gas engine heat pumps play an important role in energy saving and environment protection in both cooling and heating applications. In the present work, a thermal modelling of the gas engine driven heat pump in cooling mode is performed and system main parameters such as cooling capacity, gas engine energy consumption and primary energy ratio (PER) are computed. The modelling

E. Elgendy; J. Schmidt; A. Khalil; M. Fatouh

2011-01-01

79

Vapor cooled internal combustion engine coolant jacket  

Microsoft Academic Search

This patent describes a cooling system for a device having a structure subject to heating: 1.) a coolant jacket formed above the heated structure and into which coolant is introduced in liquid form and permitted to boil; 2.) a manifold in fluid communication with the coolant jacket for receiving the vapor generated within the coolant jacket by the boiling of

Hirano

1986-01-01

80

Site systems engineering: Systems engineering management plan.  

National Technical Information Service (NTIS)

The Site Systems Engineering Management Plan (SEMP) is the Westinghouse Hanford Company (WHC) implementation document for the Hanford Site Systems Engineering Policy, (RLPD 430.1) and Systems Engineering Criteria Document and Implementing Directive, (RLID...

M. L. Grygiel

1996-01-01

81

Feasibility of Alternative Cooling Systems for Power Plants in the Northern Great Plains.  

National Technical Information Service (NTIS)

Partial Contents: Power plant water requirements; Operational/engineering considerations of wet and dry cooling tower systems; Environmental impacts of closed-cycle cooling systems; Economics of wet and dry cooling towers.

B. A. Tichenor J. W. Shaw

1974-01-01

82

Parts-arrangement in boiling liquid cooling system  

Microsoft Academic Search

In a boiling liquid cooling system for an engine which generates heat when operated, an arrangement is described comprising: means defining in the engine a coolant jacket into which coolant is introduced in liquid state through an inlet port formed in the engine and from which coolant is discharged in gaseous state through an outlet port formed in the engine;

Hayashi

1986-01-01

83

Radiator anti-freeze arrangement for evaporative type cooling system  

Microsoft Academic Search

A boiling liquid cooling system is described for an engine, comprising: means defining in the engine a coolant jacket into which coolant is introduced in liquid state through an inlet port formed in the engine and from which coolant is discharged in gaseous state through an outlet port formed in the engine; a radiator into which gaseous coolant from the

Hayashi

1986-01-01

84

Performance and evaluation of gas-engine-driven split-system cooling equipment at the Willow Grove Naval Air Station  

SciTech Connect

DOE`s Federal Energy Management Program supports efforts to reduce energy use and associated expenditures within the federal sector; one such effort, the New Technology Demonstration Program (NTDP)(formerly the Test Bed Demonstration program), seeks to evaluate new energy saving US technologies and secure their more timely adoption by the federal government. This report describes the field evaluation conducted to examine the performance of a 15-ton natural-gas-engine- driven, split-system, air-conditioning unit. The unit was installed at a multiple-use building at Willow Grove Naval Air Station, a regular and reserve training facility north of Philadelphia, and its performance was monitored under the NTDP.

Armstrong, P.R.; Schmelzer, J.R.

1997-01-01

85

Experiences in solar cooling systems  

NASA Astrophysics Data System (ADS)

The results of performance evaluations for nine solar cooling systems are presented, and reasons fow low or high net energy balances are discussed. Six of the nine systems are noted to have performed unfavorably compared to standard cooling systems due to thermal storage losses, excessive system electrical demands, inappropriate control strategies, poor system-to-load matching, and poor chiller performance. A reduction in heat losses in one residential unit increased the total system efficiency by 2.5%, while eliminating heat losses to the building interior increased the efficiency by 3.3%. The best system incorporated a lithium bromide absorption chiller and a Rankine cycle compression unit for a commercial application. Improvements in the cooling tower and fan configurations to increase the solar cooling system efficiency are indicated. Best performances are expected to occur in climates inducing high annual cooling loads.

Ward, D. S.

86

SOLERAS - Solar Cooling Engineering Field Test Project: Honeywell Technology Strategy Center. Final report, Volume 2. Engineering field test  

SciTech Connect

The SOLERAS solar cooling system at Arizona Public Service Company in Phoenix, Arizona, was subjected to engineering field testing for a period of 18 months. Although some problems arose, which is typical with a new engineering model, the system generally ran well. This document describes the work completed in all three phases of this program, which included the preliminary analysis and detailed design of the solar cooling system, installation, testing, and data analysis.

Not Available

1982-01-01

87

Site systems engineering: Systems engineering management plan  

Microsoft Academic Search

The Site Systems Engineering Management Plan (SEMP) is the Westinghouse Hanford Company (WHC) implementation document for the Hanford Site Systems Engineering Policy, (RLPD 430.1) and Systems Engineering Criteria Document and Implementing Directive, (RLID 430.1). These documents define the US Department of Energy (DOE), Richland Operations Office (RL) processes and products to be used at Hanford to implement the systems engineering

Grygiel

1996-01-01

88

Improvement of operating method on HFETR primary cooling system.  

National Technical Information Service (NTIS)

By using the characteristics of primary cooling system on HFETR(high flux engineering test reactor), the improvement of operating method is discussed. Based on the actual measured data, the calculating results of system resistance are presented. The resul...

Y. Wu H. Cai J. Lin H. Qiang G. Wu

1992-01-01

89

Temperature initiated passive cooling system  

Microsoft Academic Search

A passive cooling system for cooling an enclosure only when the enclosure temperature exceeds a maximum standby temperature comprises a passive heat transfer loop containing heat transfer fluid having a particular thermodynamic critical point temperature just above the maximum standby temperature. An upper portion of the heat transfer loop is insulated to prevent two phase operation below the maximum standby

Charles W

1994-01-01

90

Combustor liner cooling system  

DOEpatents

A combustor liner is disclosed. The combustor liner includes an upstream portion, a downstream end portion extending from the upstream portion along a generally longitudinal axis, and a cover layer associated with an inner surface of the downstream end portion. The downstream end portion includes the inner surface and an outer surface, the inner surface defining a plurality of microchannels. The downstream end portion further defines a plurality of passages extending between the inner surface and the outer surface. The plurality of microchannels are fluidly connected to the plurality of passages, and are configured to flow a cooling medium therethrough, cooling the combustor liner.

Lacy, Benjamin Paul; Berkman, Mert Enis

2013-08-06

91

Pulse combustion engine and heat transfer system  

Microsoft Academic Search

A fluid heating and cooling system is described comprising in combination a pulse combustion heat engine, primary heat exchange means for transferring heat rejected by the heat engine to a primary fluid to be heated, and a heat pump system. The heat engine includes chamber means for pulse combustion of a fuel to provide combustion gases which have cyclic periods

R. J. Priem; M. R. Ghassemzadeh; J. C. Griffiths

1987-01-01

92

Superconducting magnet cooling system  

DOEpatents

A device is provided for cooling a conductor to the superconducting state. The conductor is positioned within an inner conduit through which is flowing a supercooled liquid coolant in physical contact with the conductor. The inner conduit is positioned within an outer conduit so that an annular open space is formed therebetween. Through the annular space is flowing coolant in the boiling liquid state. Heat generated by the conductor is transferred by convection within the supercooled liquid coolant to the inner wall of the inner conduit and then is removed by the boiling liquid coolant, making the heat removal from the conductor relatively independent of conductor length.

Vander Arend, Peter C. (Center Valley, PA); Fowler, William B. (St. Charles, IL)

1977-01-01

93

Non-intrusive cooling system  

DOEpatents

A readily replaceable heat exchange cooling jacket for applying fluid to a system conduit pipe. The cooling jacket comprises at least two members, separable into upper and lower portions. A chamber is formed between the conduit pipe and cooling jacket once the members are positioned about the pipe. The upper portion includes a fluid spray means positioned above the pipe and the bottom portion includes a fluid removal means. The heat exchange cooling jacket is adaptable with a drain tank, a heat exchanger, a pump and other standard equipment to provide a system for removing heat from a pipe. A method to remove heat from a pipe, includes the steps of enclosing a portion of the pipe with a jacket to form a chamber between an outside surface of the pipe and the cooling jacket; spraying cooling fluid at low pressure from an upper portion of the cooling jacket, allowing the fluid to flow downwardly by gravity along the surface of the pipe toward a bottom portion of the chamber; and removing the fluid at the bottom portion of the chamber.

Morrison, Edward F. (Burnt Hills, NY); Bergman, John W. (Barrington, NH)

2001-05-22

94

Combined cooling and heating using a gas engine in a supermarket  

Microsoft Academic Search

This paper reports the results of an investigation into the practical and economic viability of an integrated combined heating and cooling system in a supermarket. This system consists of a direct-drive screw compressor, which is powered by a throttle controlled gas engine. The waste heat from the engine is used to provide hot water for space heating and for general

G. G. Maidment; X. Zhao; S. B. Riffat

2001-01-01

95

Experiences in solar cooling systems  

NASA Astrophysics Data System (ADS)

Six of the nine solar cooling systems discussed in this paper had negative energy savings. In several cases the solar cooling system used substantially more energy than a conventional system could have been expected to use. Two systems, however, had significant energy savings. These systems (1 residential and 1 commercial) obtained system thermal efficiencies of 12.0 to 12.4 percent. Their system overall efficiences averaged 11.2 and 5.2 percent respectively. The residential-sized system achieved an annual energy savings of about 16.8 GJ/year, or approximately .34 GJ/year.m2 of collector. The commercial system had equivalent values of 137 GJ/year or about .22 GJ/year/sq m of collector. It should be noted that these efficiencies re much lower than those of well-designed and properly controlled cooling systems in commercial sizes. However, with realistic system modifications and subsequent improvements in performance these solar cooling systems can be expected to achieve savings in nonrenewable energy sources of approximately 1.2 GJ/year/sq m of collector. These savings can be compared to those associated with solar space and domestic hot water heating systems of 2.2 and 2.5 GJ/year/sq m of collector, respectively.

Ward, D. S.; Oberoi, H. S.

96

Effect of Film Cooling/Regenerative Cooling on Scramjet Engine Performances.  

National Technical Information Service (NTIS)

Film cooling was modeled to allow performance prediction of scramjet engine design. The model was based on experimental results of compressible mixing layers for the vicinity of the injection slot, and on analytical results of the turbulent boundary layer...

F. Ono T. Kanda G. Masuya T. Saito Y. Wakamatsu

1994-01-01

97

Congeneration system with a Stirling engine  

SciTech Connect

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

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

1991-12-24

98

Developing Systems Engineering Ontologies  

Microsoft Academic Search

Systems engineering ontologies are required to assist interested parties in understanding the systems engineering discipline's broad and multi-faceted nature. This paper discusses the need for and general benefits of an ontology. The authors discuss the use of the domain knowledge acquisition process ontology modeling technique and its application to capture a systems engineering functional domain ontology. A preliminary systems engineering

B. Sarder; S. Ferreira

2007-01-01

99

Underground-desiccant cooling system  

Microsoft Academic Search

The Underground-Desiccant Cooling System relies on the successful coordination of various components. The central feature of the system is a bed of silica gel which will absorb moisture from house air until the gel has become saturated. When this point has been reached, the silica gel must be regenerated by passing hot air through it. For this project, the hot

1982-01-01

100

Integrated plate-type cooling systems  

SciTech Connect

Integrated plate-type concepts for cooling oil and water have been introduced by Alfa Laval Desalt A/S, of Copenhagen. The customized systems are offered to manufacturers of gearboxes, hydraulic systems and diesel engines up to 5000 kW in capacity, for applications in marine propulsion systems and power plants. The integrated plate heat exchanger concept for oil and water cooling is said to offer a number of benefits, including reduced weight and volume, which allows smaller package sizes and simpler foundations. When sea water is used for the cooling media, titanium is used as plate material while for other media, stainless steel is used. Alfa Laval has worked with MAN B W Alpha Diesel since 1979 to adapt the plate heat exchangers for a range of its products. These include the four-stroke, medium-speed diesel engines rated between 800 and 3920 kW, reduction gearboxes with PTO systems for propellers up to 15,000 kW and eight meters in diameter. 3 figs.

Not Available

1993-09-01

101

14 CFR 23.1047 - Cooling test procedures for reciprocating engine powered airplanes.  

Code of Federal Regulations, 2013 CFR

... 1 2013-01-01 2013-01-01 false Cooling test procedures for reciprocating engine powered...AND COMMUTER CATEGORY AIRPLANES Powerplant Cooling § 23.1047 Cooling test procedures for reciprocating engine...

2013-01-01

102

14 CFR 23.1045 - Cooling test procedures for turbine engine powered airplanes.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Cooling test procedures for turbine engine powered airplanes. 23.1045 Section 23.1045...Powerplant Cooling § 23.1045 Cooling test procedures for turbine engine powered airplanes. (a) Compliance...

2013-01-01

103

Site systems engineering: Systems engineering management plan  

SciTech Connect

The Site Systems Engineering Management Plan (SEMP) is the Westinghouse Hanford Company (WHC) implementation document for the Hanford Site Systems Engineering Policy, (RLPD 430.1) and Systems Engineering Criteria Document and Implementing Directive, (RLID 430.1). These documents define the US Department of Energy (DOE), Richland Operations Office (RL) processes and products to be used at Hanford to implement the systems engineering process at the site level. This SEMP describes the products being provided by the site systems engineering activity in fiscal year (FY) 1996 and the associated schedule. It also includes the procedural approach being taken by the site level systems engineering activity in the development of these products and the intended uses for the products in the integrated planning process in response to the DOE policy and implementing directives. The scope of the systems engineering process is to define a set of activities and products to be used at the site level during FY 1996 or until the successful Project Hanford Management Contractor (PHMC) is onsite as a result of contract award from Request For Proposal DE-RP06-96RL13200. Following installation of the new contractor, a long-term set of systems engineering procedures and products will be defined for management of the Hanford Project. The extent to which each project applies the systems engineering process and the specific tools used are determined by the project`s management.

Grygiel, M.L. [Westinghouse Hanford Co., Richland, WA (United States)

1996-05-03

104

Ocean engineering power systems  

Microsoft Academic Search

The text presents basic thermodynamic principles and engineering considerations for ocean power systems. A survey chapter introduces a wide range of applications of power systems in the oceans. Thermodynamic principles and engine cycles are extensively reviewed in the next chapter. Then, chapters on energy sources, thermal power plants, and engineering of specific types of ocean systems are presented. Engineering principles

Carmichael

1974-01-01

105

Systems engineering management plans  

Microsoft Academic Search

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

Tamara S

2009-01-01

106

Passive cooling safety system for liquid metal cooled nuclear reactors  

DOEpatents

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of partitions surrounding the reactor vessel in spaced apart relation forming intermediate areas for circulating heat transferring fluid which remove and carry away heat from the reactor vessel. The passive cooling system includes a closed primary fluid circuit through the partitions surrounding the reactor vessel and a partially adjoining secondary open fluid circuit for carrying transferred heat out into the atmosphere.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA); Hui, Marvin M. (Sunnyvale, CA); Berglund, Robert C. (Saratoga, CA)

1991-01-01

107

Indirect passive cooling system for liquid metal cooled nuclear reactors  

DOEpatents

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of partitions surrounding the reactor vessel in spaced apart relation forming intermediate areas for circulating heat transferring fluid which remove and carry away heat from the reactor vessel. The passive cooling system includes a closed primary fluid circuit through the partitions surrounding the reactor vessel and a partially adjoining secondary open fluid circuit for carrying transferred heat out into the atmosphere.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1990-01-01

108

Helical Muon Beam Cooling Channel Engineering Design  

SciTech Connect

The Helical Cooling Channel (HCC), a novel technique for six-dimensional (6D) ionization cooling of muon beams, has shown considerable promise based on analytic and simulation studies. However, the implementation of this revolutionary method of muon cooling requires new techniques for the integration of hydrogen-pressurized, high-power RF cavities into the low-temperature superconducting magnets of the HCC. We present the progress toward a conceptual design for the integration of 805 MHz RF cavities into a 10 T Nb{sub 3}Sn based HCC test section. We include discussions on the pressure and thermal barriers needed within the cryostat to maintain operation of the magnet at 4.2 K while operating the RF and energy absorber at a higher temperature. Additionally, we include progress on the Nb{sub 3}Sn helical solenoid design.

Kashikhin, V.S.; Lopes, M.L.; Romanov, G.V.; Tartaglia, M.A.; Yonehara, K.; Yu, M.; Zlobin, A.V.; /Fermilab; Flanagan, G.; Johnson, R.P.; Kazakevich, G.M.; Marhauser, F.; /MUONS Inc., Batavia

2012-05-01

109

Cryogenic Engineering for Superconducting Power Transmission Systems.  

National Technical Information Service (NTIS)

The successful introduction of helium-cooled (superconducting) transmission systems into electric utility networks will open a vast market for cryogenic engineering components and services. If only 10 percent of the anticipated investment in transmission ...

E. B. Forsyth

1976-01-01

110

Beverage dispenser cooling system  

Microsoft Academic Search

In a beverage dispensing system of the type having a supply container of the beverage located at a storage site, valve means at a dispensing site remote from the storage site for dispensing the beverage, pressure means for supplying the beverage under pressure from the supply container to the valve means through a beverage conduit, refrigeration means at the storage

Stanfill

1988-01-01

111

Cooling System for Ramjet Engine.  

National Technical Information Service (NTIS)

This report describes a ramjet powered vehicle having a bleed slot in the subsonic diffuser, for the ramjet combustor, which supplies air to a turbine for supplying power to vehicle accessories. A vortex tube is provided between the bleed slot and the tur...

M. B. Bergsten

1979-01-01

112

Gas hydrate cool storage system  

DOEpatents

The invention presented relates to the development of a process utilizing a gas hydrate as a cool storage medium for alleviating electric load demands during peak usage periods. Several objectives of the invention are mentioned concerning the formation of the gas hydrate as storage material in a thermal energy storage system within a heat pump cycle system. The gas hydrate was formed using a refrigerant in water and an example with R-12 refrigerant is included. (BCS)

Ternes, M.P.; Kedl, R.J.

1984-09-12

113

46 CFR 153.432 - Cooling systems.  

Code of Federal Regulations, 2012 CFR

...DANGEROUS CARGOES SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment Cargo Temperature Control Systems § 153.432 Cooling systems. (a) Each cargo cooling system must have...

2012-10-01

114

46 CFR 153.432 - Cooling systems.  

Code of Federal Regulations, 2011 CFR

...DANGEROUS CARGOES SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS Design and Equipment Cargo Temperature Control Systems § 153.432 Cooling systems. (a) Each cargo cooling system must have...

2011-10-01

115

Systems engineering management plan  

Microsoft Academic Search

The purpose of this Systems Engineering Management Plan (SEMP) is to prescribe the systems engineering procedures to be implemented at the Program level and the minimum requirements for systems engineering at the Program-element level. The Program level corresponds to the Director, OCRWM, or to the organizations within OCRWM to which the Director delegates responsibility for the development of the System

Conner

1985-01-01

116

Solar engineering - 1981; Proceedings of the Third Annual Conference on Systems Simulation, Economic Analysis\\/Solar Heating and Cooling Operational Results, Reno, NV, April 27May 1, 1981  

Microsoft Academic Search

Progress made toward the commercialization of solar energy technologies as of 1981 is assessed, and attention is given to the future uses and impacts of solar energy. Attention is given to the results of several years of monitoring and modifying solar heating and cooling on residential and commercial structures. Solar system simulation and analysis methods are reviewed, covering the performance

R. L. Reid; L. M. Murphy; D. S. Ward

1981-01-01

117

Cooling system optimisation of turbine guide vane  

Microsoft Academic Search

This paper discuses the problem of cooling system optimisation within a gas turbine vane. The analysis involves the optimisation of size and location of internal cooling passages within the vane. Cooling is provided with ten circular passages and heat is transported only convectively. The task is approached in 3D configuration. Each passage is fed with cooling air of constant parameters

Grzegorz Nowak; W?odzimierz Wrblewski

2009-01-01

118

Evaluation of Three Commercial Microclimate Cooling Systems,  

National Technical Information Service (NTIS)

Three commercially available microclimate cooling systems were evaluated for their ability to reduce heat stress in men exercising in a hot environment while wearing high insulative, low permeability clothing. The cooling systems were: 1) ILC Dover Model ...

B. S. Cadarette B. S. DeCristofano K. N. Speckman M. N. Sawka

1988-01-01

119

Cooling system for superconducting magnet  

SciTech Connect

A cooling system is configured to control the flow of a refrigerant by controlling the rate at which the refrigerant is heated, thereby providing an efficient and reliable approach to cooling a load (e.g., magnets, rotors). The cooling system includes a conduit circuit connected to the load and within which a refrigerant circulates; a heat exchanger, connected within the conduit circuit and disposed remotely from the load; a first and a second reservoir, each connected within the conduit, each holding at least a portion of the refrigerant; a heater configured to independently heat the first and second reservoirs. In a first mode, the heater heats the first reservoir, thereby causing the refrigerant to flow from the first reservoir through the load and heat exchanger, via the conduit circuit and into the second reservoir. In a second mode, the heater heats the second reservoir to cause the refrigerant to flow from the second reservoir through the load and heat exchanger via the conduit circuit and into the first reservoir. 3 figs.

Gamble, B.B.; Sidi-Yekhlef, A.

1998-12-15

120

Cooling system for superconducting magnet  

DOEpatents

A cooling system is configured to control the flow of a refrigerant by controlling the rate at which the refrigerant is heated, thereby providing an efficient and reliable approach to cooling a load (e.g., magnets, rotors). The cooling system includes a conduit circuit connected to the load and within which a refrigerant circulates; a heat exchanger, connected within the conduit circuit and disposed remotely from the load; a first and a second reservoir, each connected within the conduit, each holding at least a portion of the refrigerant; a heater configured to independently heat the first and second reservoirs. In a first mode, the heater heats the first reservoir, thereby causing the refrigerant to flow from the first reservoir through the load and heat exchanger, via the conduit circuit and into the second reservoir. In a second mode, the heater heats the second reservoir to cause the refrigerant to flow from the second reservoir through the load and heat exchanger via the conduit circuit and into the first reservoir.

Gamble, Bruce B. (Wellesley, MA); Sidi-Yekhlef, Ahmed (Framingham, MA)

1998-01-01

121

Liquid-cooled engine of the vertical shaft type  

SciTech Connect

A liquid-cooled engine is described of the vertical shaft type including a radiator and a row of left and right side cylinders arranged in the V-shape as viewed from the above. A cooling water jacket of each of the left and right side cylinders are connected to each other at the highest end of cooling water jackets at the sides of cylinder heads of each of the cylinders through a communicating passage. A thermostat chamber is provided at the highest end of one of the cooling water jackets in the cylinder heads which is located lower than the other cylinder head. The communicating passage is at its one end connected to the thermostat chamber.

Tamba, S.; Hitomi, M.; Noboru, F.; Kobe, M.

1987-07-21

122

Manufacturing systems engineering and management  

Microsoft Academic Search

This paper presents a discussion of manufacturing systems engineering and manufacturing systems management as one of the major efforts that concern systems engineers. There are many ways in which we can describe systems engineering and within this manufacturing systems engineering and management. This paper takes a multifaceted view of systems engineering. It attempts to describe systems engineering in terms of

Andrew P. Sage

1996-01-01

123

Evaluation of three commercial microclimate cooling systems  

Microsoft Academic Search

Three commercially available microclimate cooling systems were evaluated for their ability to reduce heat stress in men exercising in a hot environment while wearing high insulative, low permeability clothing. The cooling systems were: (1) ILC Dover Model 19 Coolvest (ILC) (2) LSSI Coolhead(LSSI), and (3) Thermacor Cooling vest (THERM). Endurance Time (ET), Heart Rate (HR), rectal temperature (Tre), mean skin

Bruce S. Cadarette; Barry S. Decristofano; Karen N. Speckman; Michael N. Sawka

1988-01-01

124

14 CFR 23.1047 - Cooling test procedures for reciprocating engine powered airplanes.  

Code of Federal Regulations, 2010 CFR

...AIRPLANES Powerplant Cooling § 23.1047 Cooling test procedures for reciprocating engine powered...applicable performance requirements that are critical to cooling. [Amdt. 23-51, 61 FR 5137, Feb. 9, 1996] Liquid...

2010-01-01

125

14 CFR 23.1047 - Cooling test procedures for reciprocating engine powered airplanes.  

Code of Federal Regulations, 2010 CFR

...AIRPLANES Powerplant Cooling § 23.1047 Cooling test procedures for reciprocating engine powered...applicable performance requirements that are critical to cooling. [Amdt. 23-51, 61 FR 5137, Feb. 9, 1996] Liquid...

2009-01-01

126

Bringing Engineering Design into High School Science Classrooms: The Heating/Cooling Unit  

NASA Astrophysics Data System (ADS)

Infusing engineering design projects in K-12 settings can promote interest and attract a wide range of students to engineering careers. However, the current climate of high-stakes testing and accountability to standards leaves little room to incorporate engineering design into K-12 classrooms. We argue that design-based learning, the combination of scientific inquiry and engineering design, is an approach that can be used to meet both K-12 educators' and engineering advocates' goals. This paper describes an 8-week high school curriculum unit, the Heating/Cooling System, in which engineering design is used to teach students central and difficult chemistry concepts such as atomic interactions, reactions, and energy changes in reactions. The goals of the paper are to (1) describe this successful design-based unit, (2) provide guidelines for incorporating design-based learning into other science topics, and (3) provide some evidence of its value for teaching difficult chemistry concepts and increasing interest in engineering careers.

Apedoe, Xornam S.; Reynolds, Birdy; Ellefson, Michelle R.; Schunn, Christian D.

2008-10-01

127

Evaporative cooling enhanced cold storage system  

DOEpatents

The invention provides an evaporatively enhanced cold storage system wherein a warm air stream is cooled and the cooled air stream is thereafter passed into contact with a cold storage unit. Moisture is added to the cooled air stream prior to or during contact of the cooled air stream with the cold storage unit to effect enhanced cooling of the cold storage unit due to evaporation of all or a portion of the added moisture. Preferably at least a portion of the added moisture comprises water condensed during the cooling of the warm air stream.

Carr, Peter (Cary, NC)

1991-01-01

128

Evaporative cooling enhanced cold storage system  

DOEpatents

The invention provides an evaporatively enhanced cold storage system wherein a warm air stream is cooled and the cooled air stream is thereafter passed into contact with a cold storage unit. Moisture is added to the cooled air stream prior to or during contact of the cooled air stream with the cold storage unit to effect enhanced cooling of the cold storage unit due to evaporation of all or a portion of the added moisture. Preferably at least a portion of the added moisture comprises water condensed during the cooling of the warm air stream. 3 figures.

Carr, P.

1991-10-15

129

Center for Systems Engineering  

Microsoft Academic Search

Systems Engineering (SE) is an interdisciplinary engineering management process that evolves and verifies an integrated, life cycle balanced set of system solutions that satisfy customer needs. It is comprehensive, iterative, multi-functional, technical management process that includes translating operational requirements into configured systems. It is responsible for integrating the technical inputs of the entire design team, managing interfaces, characterizing and managing

K. Bausman; M. Wilson

2003-01-01

130

Cryogenic engineering for superconducting power transmission systems  

Microsoft Academic Search

The successful introduction of helium-cooled (superconducting) transmission systems into electric utility networks will open a vast market for cryogenic engineering components and services. If only 10 percent of the anticipated investment in transmission facilities in the U.S. after 1990 is made in helium-cooled systems this will represent a potential annual market of over $120,000,000 for the manufacturers of cryogenic components.

Forsyth

1976-01-01

131

Engine system assessment study using Martian propellants  

NASA Astrophysics Data System (ADS)

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

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

1992-07-01

132

Reactor core isolation cooling system  

DOEpatents

A reactor core isolation cooling system includes a reactor pressure vessel containing a reactor core, a drywell vessel, a containment vessel, and an isolation pool containing an isolation condenser. A turbine is operatively joined to the pressure vessel outlet steamline and powers a pump operatively joined to the pressure vessel feedwater line. In operation, steam from the pressure vessel powers the turbine which in turn powers the pump to pump makeup water from a pool to the feedwater line into the pressure vessel for maintaining water level over the reactor core. Steam discharged from the turbine is channeled to the isolation condenser and is condensed therein. The resulting heat is discharged into the isolation pool and vented to the atmosphere outside the containment vessel for removing heat therefrom.

Cooke, Franklin E. (San Jose, CA)

1992-01-01

133

A novel diesel-fueled engine for microclimate cooling for the individual soldier  

NASA Astrophysics Data System (ADS)

Military mission performance in a chemically contaminated environment necessitates the wearing of chemically impermeable protective garments. Soldiers encapsulated in these protective garments in a hot environment will succumb to heat stress. Consequently a microclimate cooling system is being developed. In the present design, a vapor compression cycle chills water which is then circulated over the body to absorb heat via a cooling garment. One of the major components of the vapor compression cycle system is the prime mover, i.e., the engine. For battlefield use, the engine shall utilize battlefield fuel, JP-8. Commercially available engines of the required size, approximately 0.5 hp at 4000 rpm, such as model aircraft engines and small outdoor power equipment (string trimmers) engines do not start and run on JP-8. This effort established the technical feasibility of starting and operating a small, lightweight engine on diesel fuel and JP-8. A commercially available 1.09 cubic inch displacement was used; however, the stock head was replaced with a custom designed head employing a fuel injector and pre-chamber. The engine started by hand cranking from ambient temperature (70 F) and ran without aids. The engine developed 0.42 brake hp at 3700 rpm. Brake specific fuel consumption was 0.76 lb/bbp-hr.

Chen, T. K.; Lam, W. K.; Raymond, R. J.

1992-07-01

134

Emergency cooling system and method  

DOEpatents

An improved emergency cooling system and method are disclosed that may be adapted for incorporation into or use with a nuclear BWR wherein a reactor pressure vessel (RPV) containing a nuclear core and a heat transfer fluid for circulation in a heat transfer relationship with the core is housed within an annular sealed drywell and is fluid communicable therewith for passage thereto in an emergency situation the heat transfer fluid in a gaseous phase and any noncondensibles present in the RPV, an annular sealed wetwell houses the drywell, and a pressure suppression pool of liquid is disposed in the wetwell and is connected to the drywell by submerged vents. The improved emergency cooling system and method has a containment condenser for receiving condensible heat transfer fluid in a gaseous phase and noncondensibles for condensing at least a portion of the heat transfer fluid. The containment condenser has an inlet in fluid communication with the drywell for receiving heat transfer fluid and noncondensibles, a first outlet in fluid communication with the RPV for the return to the RPV of the condensed portion of the heat transfer fluid and a second outlet in fluid communication with the drywell for passage of the noncondensed balance of the heat transfer fluid and the noncondensibles. The noncondensed balance of the heat transfer fluid and the noncondensibles passed to the drywell from the containment condenser are mixed with the heat transfer fluid and the noncondensibles from the RPV for passage into the containment condenser. A water pool is provided in heat transfer relationship with the containment condenser and is thermally communicable in an emergency situation with an environment outside of the drywell and the wetwell for conducting heat transferred from the containment condenser away from the wetwell and the drywell. 5 figs.

Oosterkamp, W.J.; Cheung, Y.K.

1994-01-04

135

Nuclear propulsion systems engineering  

SciTech Connect

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

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

1992-12-31

136

Nuclear propulsion systems engineering  

SciTech Connect

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

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

1992-01-01

137

Systems engineering management plans.  

SciTech Connect

The Systems Engineering Management Plan (SEMP) is a comprehensive and effective tool used to assist in the management of systems engineering efforts. It is intended to guide the work of all those involved in the project. The SEMP is comprised of three main sections: technical project planning and control, systems engineering process, and engineering specialty integration. The contents of each section must be tailored to the specific effort. A model outline and example SEMP are provided. The target audience is those who are familiar with the systems engineering approach and who have an interest in employing the SEMP as a tool for systems management. The goal of this document is to provide the reader with an appreciation for the use and importance of the SEMP, as well as provide a framework that can be used to create the management plan.

Rodriguez, Tamara S.

2009-10-01

138

Ice pond cooling system for power plants  

SciTech Connect

The use of melting ice to cool the power plant condenser effluent is considered as an alternative approach for high latitude locations where ice is readily available. The main interest in this technique is the expected reduction in water consumption. The results of a feasibility study of the engineering and economical possibilities of a power plant employing this technique are presented. This scheme was applied to a 1000 MW nuclear power plant that requires a constant condenser cooling water flow of 1337 cfs.

Miller, A.C.; Pena, J.A.; Urbsanski, J.; Kerr, S.N.

1983-09-01

139

District cooling engineering and design program. Final report  

SciTech Connect

The operation and performance of a system using large commercial heat pumps to heat and cool two public buildings are reported. One of the buildings houses local government offices and the other the jail. The system uses the underground salt water at the site as the energy exchange medium. Included are: the operations summary, system performance, operating procedures, and operating modes. (MHR)

Not Available

1992-09-01

140

Developing Data System Engineers  

NASA Astrophysics Data System (ADS)

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

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

2011-12-01

141

SOLERAS - Saudi University Solar Cooling Laboratories Project: University of Petroleum and Minerals. Solar cooling system. Final report  

SciTech Connect

This report provides details of the proposed solar cooling laboratory, including descriptions of the building and design conditions; the collector/storage subsystem; the Rankine cycle engine subsystem; instrumentation and data acquisition; and an implementation plan. Appendices of relevant data including computer programs for building load and engine system calculations and descriptions of equipment are included.

Not Available

1986-01-01

142

Rocket engine condition monitoring system  

Microsoft Academic Search

It is expected that the Rocket Engine Condition Monitoring System (RECMS) program will define engine monitoring technologies and an integration approach which can be applied to engine development in support of advanced launch system objectives. The RECMS program approaches engine monitoring as a system which is fully integrated with the engine controller, vehicle monitoring system, and ground processing systems to

S. K. Hagar; J. F. Alcock

1989-01-01

143

Liquid metal cooled nuclear reactor plant system  

DOEpatents

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting for fuel decay during reactor shutdown, or heat produced during a mishap. The reactor system is enhanced with sealing means for excluding external air from contact with the liquid metal coolant leaking from the reactor vessel during an accident. The invention also includes a silo structure which resists attack by leaking liquid metal coolant, and an added unique cooling means.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1993-01-01

144

Development of Cooling System for Gyrotron Collector  

NASA Astrophysics Data System (ADS)

In this paper, the development of cooling system for 42 GHz, 200 kW gyrotron collector is presented. The design of the cooling duct has been finalized after different analyses such as, the fluid analysis, the thermal analysis, the structural analysis, etc. All analyses have been carried out by ANSYS software and the development of the cooling system based on the final design is performed.

Goswami, Uttam Kumar; Singh, Udaybir; Kumar, Nitin; Sahu, Naveen Kumar; Kumar, Anil; Yadav, Vivek; Kumar, Manoj; Khatun, Hasina; Dua, Rajeshwar Lal; Sinha, A. K.

2013-08-01

145

Heat-driven acoustic cooling engine having no moving parts  

DOEpatents

A heat-driven acoustic cooling engine having no moving parts receives heat from a heat source. The acoustic cooling engine comprises an elongated resonant pressure vessel having first and second ends. A compressible fluid having a substantial thermal expansion coefficient and capable of supporting an acoustic standing wave is contained in the resonant pressure vessel. The heat source supplies heat to the first end of the vessel. A first heat exchanger in the vessel is spaced-apart from the first end and receives heat from the first end. A first thermodynamic element is adjacent to the first heat exchanger and converts some of the heat transmitted by the first heat exchanger into acoustic power. A second thermodynamic element has a first end located spaced-apart from the first thermodynamic element and a second end farther away from the first thermodynamic element than is its first end. The first end of the second thermodynamic element heats while its second end cools as a consequence of the acoustic power. A second heat exchanger is adjacent to and between the first and second thermodynamic elements. A heat sink outside of the vessel is thermally coupled to and receives heat from the second heat exchanger. The resonant pressure vessel can include a housing less than one-fourth wavelength in length coupled to a reservoir. The housing can include a reduced diameter portion communicating with the reservoir.

Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Santa Fe, NM); Migliori, Albert (Santa Fe, NM); Hofler, Thomas J. (Los Alamos, NM)

1989-01-01

146

Advances in Solar Heating and Cooling Systems  

ERIC Educational Resources Information Center

Reports on technological advancements in the fields of solar collectors, thermal storage systems, and solar heating and cooling systems. Diagrams aid in the understanding of the thermodynamics of the systems. (CP)

Ward, Dan S.

1976-01-01

147

Automotive Stirling Engine systems development  

Microsoft Academic Search

The objective of the Automotive Stirling Engine (ASE) program is to develop a Stirling engine for automotive use that provides a 30% improvement in fuel economy relative to a comparable internal-combustion engine while meeting emissions goals. This paper traces the engine systems' development efforts focusing on: 1) a summary of engine system performance for all Mod I engines; 2) the

Richey

1984-01-01

148

Steam powered heating\\/cooling systems  

Microsoft Academic Search

A cooling system is described having a boiler, a heat source for the boiler including a burner, an absorption machine having a generator section and an absorber section, a steam trap for the generator section of the absorption machine, a condensate tank with a vent line to atmosphere and work to be heated. The cooling system consists of a steam

1987-01-01

149

Method of, and apparatus for, killing marine life in and about the cooling system of a marine vehicle  

SciTech Connect

This patent describes a method of killing marine life in the cooling system of a marine vehicle having a water-cooled internal combustion engine. It comprises: providing an enclosure about the inlet and outlet ports such that water circulated through the cooling system will be drawn from, and discharged back into, the enclosure; and operating the engine so as to cause the temperature of the water within the enclosure and the cooling system to increase to a predetermined minimum temperature; thereby to cause marine life in the enclosure and cooling system to be killed by the increased temperature of water within the cooling system and enclosure.

Brockhurst, J.V.

1992-09-22

150

Systems engineering management plan  

SciTech Connect

The purpose of this Systems Engineering Management Plan (SEMP) is to prescribe the systems engineering procedures to be implemented at the Program level and the minimum requirements for systems engineering at the Program-element level. The Program level corresponds to the Director, OCRWM, or to the organizations within OCRWM to which the Director delegates responsibility for the development of the System and for coordinating and integrating the activities at the Program-element level. The Office of Policy and Outreach (OPO) and the Office of Resource Management (ORM) support the Director at the Program level. The Program-element level corresponds to the organizations within OCRWM (i.e., the Office of Geologic Repositories (OGR) and the Office of Storage and Transportation Systems (OSTS)) with overall responsibility for developing the System elements - that is, the mined geologic disposal system (MGDS), monitored retrievable storage (MRS) (if approved by Congress), and the transportation system.

Conner, C.W.

1985-10-01

151

Soft Computing in Absorption Cooling Systems  

Microsoft Academic Search

\\u000a Absorption cooling systems make sense in many applications for process water cooling. Instead of mechanically compressing\\u000a a refrigerant gas, as in the conventional vapor compression process, absorption cooling uses a thermo-chemical process. Two\\u000a different fluids are used, a refrigerant and an absorbent. Heat directly from natural gas combustion, solar energy, waste-heat\\u000a source or indirectly from a boiler, drives the process.

Arzu ?ahin; Soteris Kalogirou

152

Performance of a solar desiccant cooling system  

SciTech Connect

A solar desiccant cooling system was operated at the Solar Energy Applications Laboratory, Colordado State University, throughout the 1986 summer. The system comprises an American Solar King fresh air heating/desiccant evaporative cooling unit, a Sunmaster evacuated tube solar collector, hot water solar storage tank, auxiliary electric boiler, controls, and accessories. The cooling unit is operated in the ventilation mode, fresh air being dried in a rotating desiccant matrix, and cooled by heat exchange and evaporative cooling. Return air is used as a cooling medium in a rotating heat exchange matrix, heated by solar energy in a heat exchange coil, and discarded through the rotating desiccant bed. The solar-driven system provided over 90 percent of the seasonal cooling requirements in an experimental, residence type building at average COP levels of 1.0 and solar collection efficiencies of 50 percent when supplied with solar heated water at temperatures of 50 to 65/sup 0/C. Detailed operating results, including total and average solar cooling provided, coefficients of performance, and overall solar cooling performance ratios are presented.

Lof, G.O.G.; Cler, G.; Brisbane, T.

1988-08-01

153

Systems thinking or systems engineering  

Microsoft Academic Search

The problem faced by most systems organisations is how to develop and sustain staff with the appropriate systems skills and experience. To date, much has been made of the delineation of systems thinking and systems engineering. In this research, the partitioning of \\

Kate M. Gill

2009-01-01

154

Engineering Secure Software Systems  

Microsoft Academic Search

Is there such a thing anymore as a software system that doesn't need to be secure? Almost every software- controlled system faces threats from potential adversaries, from Internet-aware client applications running on PCs, to complex telecommunications and power systems accessible over the Internet, to commodity software with copy protec- tion mechanisms. Software engineers must be cognizant of these threats and

Premkumar T. Devanbu; Stuart G. Stubblebine

155

Subsurface ground temperature: Implications for a district cooling system  

SciTech Connect

Elevated ground temperatures represent an undesirable source of heat gain for uninsulated buried piping found in many district cooling systems. It has been customary for the owners of district cooling systems in northern climates not to insulate their buried chilled water piping. Utility engineers for a large district cooling system at one northern US university have relied on published subsurface ground temperature data and over the past 30 years have installed more than 15 miles (24 km) of directly buried uninsulated chilled water supply and return distribution piping. The utility engineers now estimate that during the summer cooling season, peak heat gains in the buried chilled water piping exceed 450 tons (1,583 kW) and cause $100,000 in energy losses each year. Ground heat gains due to elevated subsurface temperature have been suspected as production tonnage exceeds end-user sales by 10% during the peak cooling season. The utilities staff decided it was time to reassess method for installing chilled water piping on campus and determine if the university design standard of installing uninsulated buried chilled water piping remains valid for the campus environment.

McCabe, R.E.; Bender, J.J.; Potter, K.R. [Cornell Univ., Ithaca, NY (United States)

1995-12-01

156

Engine system assessment study using Martian propellants  

NASA Astrophysics Data System (ADS)

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

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

1992-06-01

157

Cooling system for a nuclear reactor  

DOEpatents

A cooling system for a gas-cooled nuclear reactor is disclosed which includes at least one primary cooling loop adapted to pass coolant gas from the reactor core and an associated steam generator through a duct system having a main circulator therein, and at least one auxiliary cooling loop having communication with the reactor core and adapted to selectively pass coolant gas through an auxiliary heat exchanger and circulator. The main and auxiliary circulators are installed in a common vertical cavity in the reactor vessel, and a common return duct communicates with the reactor core and intersects the common cavity at a junction at which is located a flow diverter valve operative to effect coolant flow through either the primary or auxiliary cooling loops.

Amtmann, Hans H. (Rancho Santa Fe, CA)

1982-01-01

158

Closed Loop Cooling Systems for HTS Applications  

NASA Astrophysics Data System (ADS)

Stirling Cryogenics & Refrigeration BV has developed a complete range of closed loop cooling systems for High Temperature Superconducting applications. Several solutions are available depending on the requirements of the application to be cooled. Using liquid nitrogen as a working medium, a temperature as low as 65K can be used. The cooling power at 65K can be in the range of several hundred watts to several kilowatts. The distribution of the cooling power can be done by using the latent heat of evaporation or by using the heat capacity of sub-cooled liquid. The latter requires a fully automated pumping cryostat, containing all the components required for a controlled cool down of the application, sub cooling of the working fluid, transport of the liquid through the application and precise temperature regulation. For low temperature applications, two-stage cryocoolers provide cooling power at 20K and 80K temperature regions. Distribution of cooling capacity can eg. be done by forced flow of gaseous helium or by reliquefaction of neon.

Willems, D.; Dioguardi, F.; den Heijer, R.

2006-04-01

159

Development of jet pump solar cooling system. Final report  

Microsoft Academic Search

A small vapor jet solar cooling system capable of cooling about one room (7000 Btu\\/h) was designed, built and performance tested. The vapor jet solar cooling system is a new low cost cooling system which runs primarily on solar energy from relatively low cost flat plate solar collectors. The jet pump solar cooling system is basically a standard vapor compression

R. E. Holmes; F. Zeren

1983-01-01

160

Risk management systems engineering  

Microsoft Academic Search

A major purpose of the systems management function is to implement the strategic plan of the organization so as to provide a total quality approach, including associated risk management. The author examines a number of issues related to risk management. Systems engineering processes are inherently subject to risks of a variety of types. When risks materialize, they usually manifest themselves

Andrew P. Sage

1995-01-01

161

Preliminary engineering design of sodium-cooled CANDLE core  

NASA Astrophysics Data System (ADS)

The CANDLE burning process is characterized by the autonomous shifting of burning region with constant reactivity and constant spacial power distribution. Evaluations of such critical burning process by using widely used neutron diffusion and burning codes under some realistic engineering constraints are valuable to confirm the technical feasibility of the CANDLE concept and to put the idea into concrete core design. In the first part of this paper, it is discussed that whether the sustainable and stable CANDLE burning process can be reproduced even by using conventional core analysis tools such as SLAROM and CITATION-FBR. As a result, it is certainly possible to demonstrate it if the proper core configuration and initial fuel composition required as CANDLE core are applied to the analysis. In the latter part, an example of a concrete image of sodium cooled, metal fuel, 2000MWt rating CANDLE core has been presented by assuming an emerging inevitable technology of recladding. The core satisfies engineering design criteria including cladding temperature, pressure drop, linear heat rate, and cumulative damage fraction (CDF) of cladding, fast neutron fluence and sodium void reactivity which are defined in the Japanese FBR design project. It can be concluded that it is feasible to design CADLE core by using conventional codes while satisfying some realistic engineering design constraints assuming that recladding at certain time interval is technically feasible.

Takaki, Naoyuki; Namekawa, Azuma; Yoda, Tomoyuki; Mizutani, Akihiko; Sekimoto, Hiroshi

2012-06-01

162

Engineering scalable biological systems.  

PubMed

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

Lu, Timothy K

163

Gas hydrate cool storage system  

DOEpatents

This invention is a process for formation of a gas hydrate to be used as a cool storage medium using a refrigerant in water. Mixing of the immiscible refrigerant and water is effected by addition of a surfactant and agitation. The difficult problem of subcooling during the process is overcome by using the surfactant and agitation and performance of the process significantly improves and approaches ideal.

Ternes, Mark P. (Knoxville, TN); Kedl, Robert J. (Oak Ridge, TN)

1985-01-01

164

Cooling classical particles with a microcanonical Szilard engine.  

PubMed

The possibility of extracting energy from a system in a cyclic process is discussed. We present an explicit example where a system, initially prepared in a microcanonical state, is able to perform such an operation. The example is similar to the Szilard engine, but the microcanonical initial condition allows one to design a protocol where measurement is not necessary. PMID:20867314

Marathe, Rahul; Parrondo, J M R

2010-06-17

165

The Cooling Device of Drum Brake System by Using Thermoelestic Cooling Module  

Microsoft Academic Search

The research is presented a kind of cooling device for a vehicles drum brake cooling system, which comprises a thermoelectric cooling (TEC) chip and a heat exchange system. After inputting electric power, the TEC chip provides one cooling surface which is stick on the brake system and absorbs the heat from the brake pads or shoes. The other surface releases

M.-H. Hsueh

2012-01-01

166

Replacement inhibitors for tank farm cooling coil systems  

SciTech Connect

Sodium chromate has been an effective corrosion inhibitor for the cooling coil systems in Savannah River Site (SRS) waste tanks for over 40 years. Due to their age and operating history, cooling coils occasionally fail allowing chromate water to leak into the environment. When the leaks spill 10 lbs. or more of sodium chromate over a 24-hr period, the leak incidents are classified as Unusual Occurrences (UO) per CERCLA (Comprehensive Environmental Response, Compensation and Liability Act). The cost of reporting and cleaning up chromate spills prompted High Level Waste Engineering (HLWE) to initiate a study to investigate alternative tank cooling water inhibitor systems and the associated cost of replacement. Several inhibitor systems were investigated as potential alternatives to sodium chromate. All would have a lesser regulatory impact, if a spill occurred. However, the conversion cost is estimated to be $8.5 million over a period of 8 to 12 months to convert all 5 cooling systems. Although each of the alternative inhibitors examined is effective in preventing corrosion, there is no inhibitor identified that is as effective as chromate. Assuming 3 major leaks a year (the average over the past several years), the cost of maintaining the existing inhibitor was estimated at $0.5 million per year. Since there is no economic or regulatory incentive to replace the sodium chromate with an alternate inhibitor, HLWE recommends that sodium chromate continue to be used as the inhibitor for the waste tank cooling systems.

Hsu, T.C.

1995-03-23

167

The prediction of nozzle performance and heat transfer in hydrogen/oxygen rocket engines with transpiration cooling, film cooling, and high area ratios  

NASA Astrophysics Data System (ADS)

An advanced engineering computational model has been developed to aid in the analysis and design of hydrogen/oxygen chemical rocket engines. The complete multi-species, chemically reacting and diffusing Navier-Stokes equations are modelled, finite difference approach that is tailored to be conservative in an axisymmetric coordinate system for both the inviscid and viscous terms. Demonstration cases are presented for a 1030:1 area ratio nozzle, a 25 lbf film cooled nozzle, and transpiration cooled plug-and-spool rocket engine. The results indicate that the thrust coefficient predictions of the 1030:1 nozzle and the film cooled nozzle are within 0.2 to 0.5 percent, respectively, of experimental measurements when all of the chemical reaction and diffusion terms are considered. Further, the model's predictions agree very well with the heat transfer measurements made in all of the nozzle test cases. The Soret thermal diffusion term is demonstrated to have a significant effect on the predicted mass fraction of hydrogen along the wall of the nozzle in both the laminar flow 1030:1 nozzle and the turbulent plug-and-spool rocket engine analysis cases performed. Further, the Soret term was shown to represent a significant fraction of the diffusion fluxes occurring in the transpiration cooled rocket engine.

Kacynski, Kenneth J.; Hoffman, Joe D.

1993-11-01

168

Passive cooling system for top entry liquid metal cooled nuclear reactors  

DOEpatents

A liquid metal cooled nuclear fission reactor plant having a top entry loop joined satellite assembly with a passive auxiliary safety cooling system for removing residual heat resulting from fuel decay during shutdown, or heat produced during a mishap. This satellite type reactor plant is enhanced by a backup or secondary passive safety cooling system which augments the primary passive auxiliary cooling system when in operation, and replaces the primary cooling system when rendered inoperative.

Boardman, Charles E. (Saratoga, CA); Hunsbedt, Anstein (Los Gatos, CA); Hui, Marvin M. (Cupertino, CA)

1992-01-01

169

Plural engine power producing system  

SciTech Connect

A system is described for producing power utilizing gas turbine engines comprising: a primary engine including a gas generator and a power turbine; a secondary engine including: a compressor; a combustor; and a turbine driving engaged with the compressor; drive means selectively coupling the gas generator of the primary engine and the secondary engine for augmenting the output power of the primary engine and for achieving improved fuel consumption of the system at low power levels.

Banthin, C.; Deman, J.

1993-08-31

170

Performance analysis of an innovative small-scale trigeneration plant with liquid desiccant cooling system  

Microsoft Academic Search

The paper deals with an innovative natural gas combined heat, cooling and power (CHCP) system with electrical, heating and cooling capacities of 126\\/220\\/210kW, respectively. The trigeneration plant is composed of a cogenerator which uses an automotive derived gas fired internal combustion engine (ICE), coupled to a liquid LiClwater desiccant cooling system which recovers heat from the flue gases and from

M. Badami; A. Portoraro

2009-01-01

171

ASRM full scale test case cooling system  

NASA Astrophysics Data System (ADS)

After an ASRM static firing, excessive motorcase heating resulting from Al2O3 accumulation could cause irrecoverable case loss if adequate cooling were not determined and provided. Cooling system performance parameters and design criteria were determined through this analysis. Comparisons were made with data from literature. Advances in the thermal analysis were accomplished as compared to previous investigators. Results were based on the analysis, comparisons to other investigators, and utilization of test data from literature.

Schuetz, Cary E.; Hollenbeck, Anne K.

1993-07-01

172

Cooling system for continuous metal casting machines  

DOEpatents

A continuous metal caster cooling system is provided in which water is supplied in jets from a large number of small nozzles against the inner surface of rim at a temperature and with sufficient pressure that the velocity of the jets is sufficiently high that the mode of heat transfer is substantially by forced convection, the liquid being returned from the cooling chambers through return pipes distributed interstitially among the nozzles. 9 figs.

Draper, R.; Sumpman, W.C.; Baker, R.J.; Williams, R.S.

1988-06-07

173

Research goals for active solar cooling systems  

Microsoft Academic Search

The energy savings potential of current absorption and Rankine cooling systems has been estimated by analysis of detailed computer simulations using TRNSYS in four cities (Phoenix, Miami, Fort Worth, and Washington, DC) and by projecting electrical and thermal performance improvements that can and must be made for economically viable systems. Incremental system cost goals for the year 2000 are established

M. L. Warren; H. S. Liers

1983-01-01

174

Preoperational test report, recirculation condenser cooling systems  

SciTech Connect

This represents a preoperational test report for Recirculation Condenser Systems, Project W-030. Project W-030 provides a ventilation upgrade for the four Aging Waste Facility tanks. The four system provide condenser cooling water for vapor space cooling of tanks AY1O1, AY102, AZ1O1, AZ102. Each system consists of a valved piping loop, a pair of redundant recirculation pumps, a closed-loop evaporative cooling tower, and supporting instrumentation; equipment is located outside the farm on concrete slabs. Piping is routed to the each ventilation condenser inside the farm via below-grade concrete trenches. The tests verify correct system operation and correct indications displayed by the central Monitor and Control System.

Clifton, F.T.

1997-11-04

175

Automatic pre-cooling system for large infrared instruments  

NASA Astrophysics Data System (ADS)

An infrared instrument used for observation has to keep the detector and optical components in a very cold environment during operation. However, because of maintenance, upgrades, and other routine work, there are situations that require the instrument to be warmed-up and then cooled-down again. At Subaru Observatory, our MOIRCS infrared instrument has required warm-up and cool-down several times a year for routine maintenance and filter replacement. The MOIRCS instrument has a large heat capacity and cool-down using only the closed cycle cooler is impractical due to the huge amount of time it would require. To address this problem Subaru engineers have created a mechanism to allow PRE-COOLING of the instrument via liquid nitrogen - allowing for a much faster pre-cool process. Even with liquid nitrogen, the pre-cool process requires 10 tanks and almost a week of continual monitoring in order to reach the desired target temperature. It is very difficult to work for such a long period of time at the oxygen starved summit of Mauna Kea (4205 meters),and issues of man-power and scheduling conflicts only add to the problems. To address these concerns Subaru developed an automated pre-cooling system which works continuously and remotely at the summit. The strategy was to have basic functionality for pre-cooling and user friendly interface. i.e. (1) Continuous cooling until the target temperature is reached by automated liquid nitrogen tank exchanges and precision temperature control by automated changes to the liquid nitrogen flow. (2) Remote monitoring and control of all parameter setting by Web browser as user interface (UI). The goal of the Subaru pre-cooling system was to make it both inexpensive and quick to implement by using existing technologies. The original goal (to cut down on labor and precision temperature control) has been attained through several pre-cooling and software/hardware modification cycles. We will report on the progress and status of our pre-cooling experiences in this presentation.

Omata, Koji; Nishimura, Tetsuo; Colley, Stephen; Cook, David; Gorman, William; Magrath, Barney; Ramos, Lucio; Kleinman, Scot; Tokoku, Chihiro; Konishi, Masahiro; Yoshikawa, Tomohiro; Tanaka, Ichi; Suzuki, Ryuji

2008-07-01

176

Novel diesel-fueled engine for microclimate cooling for the individual soldier. Final report Jul 91-Jan 92  

SciTech Connect

Military mission performance in a chemically contaminated environment necessitates the wearing of chemically impermeable protective garments. Soldiers encapsulated in these protective garments in a hot environment will succumb to heat stress. Consequently a microclimate cooling system is being developed. In the present design, a vapor compression cycle chills water which is then circulated over the body to absorb heat via a cooling garment. One of the major components of the vapor compression cycle system is the prime mover, i.e. the engine. For battlefield use, the engine shall utilize battlefield fuel, JP-8. Commercially available engines of the required size, approximately 0.5 hp at 4000 rpm, such as model aircraft engines and small outdoor power equipment (string trimers) engines do not start and run on JP-8. This effort established the technical feasibility of starting and operating a small, lightweight engine on diesel fuel and JP-8. A commercially available 1.09 cubic inch displacement was used; however, the stock head was replaced with a custom designed head employing a fuel injector and pre-chamber. The engine started by hand cranking from ambient temperature (70 deg F) and ran without aids. 0.42 brake hp was developed at 3700 rpm. Brake specific fuel consumption was 0.76 lb/bbp-hr. microclimate cooling, diesel engines, individual soldier, protective clothing, diesel fuels , chemical contamination, heat stress(physiology), hot environment, chemical protection.

Chen, T.K.; Lam, W.K.; Raymond, R.J.

1992-07-01

177

An advanced engine thermal management system: nonlinear control and test  

Microsoft Academic Search

Internal combustion engine thermal management system functionality can be enhanced through the introduction of smart thermostat valves and variable speed electric pumps and fans. The traditional automotive cooling system components include a wax based thermostat valve and crankshaft driven water pump. However, servo-motor driven valves, pumps, and fans can better regulate the engine's coolant fluid flow to realize fuel economy

Pradeep Setlur; John R. Wagner; Darren M. Dawson; Egidio Marotta

2005-01-01

178

Computer System Engineering  

NSDL National Science Digital Library

This course, presented by MIT, covers topics on the engineering of computer software and hardware systems. This include: techniques for controlling complexity; strong modularity using client-server design, virtual memory, and threads; networks; atomicity and coordination of parallel activities; recovery and reliability; privacy, security, and encryption; and impact of computer systems on society. The course also looks at case studies of working systems and readings from the current literature provide comparisons and contrasts, and do two design projects. The page also contains lectures notes, additional readings and a projects sections.

2008-11-26

179

Operating System Engineering  

NSDL National Science Digital Library

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

Kaashoek, Frans, 1965-

2006-01-01

180

Advanced solar\\/gas desiccant cooling system  

Microsoft Academic Search

A desiccant cooling system with significantly higher thermal efficiency than current state of the art desiccant systems is studied. The findings and data are based on extensive computer modeling and actual operating test results of an experimental breadboard unit employing an approach developed for the separation of moisture from an airstream using solid desiccants (silica gel). The results confirmed the

B. Huskey; J. Sharp; A. Venero; M. Yen

1982-01-01

181

Ozone Treatment in Cooling Water Systems  

Microsoft Academic Search

Ozone treatment for preventing the biofouling in cooling water systems is investigated.In the fresh water system, the separating effect of the ozonated water on the microorganisms such as the sphaerotilus and the zoogloea which adhere to the piping and form the slime is recognized. When the ozonated water is supplied intermittently to the piping without stopping the flow of the

N. Kaiga; T. Seki; K. Iyasu

1989-01-01

182

Object Based Systems Engineering (OBSE).  

National Technical Information Service (NTIS)

Objectives: (1) Communicate the background (past & current state) & motivation for Object Based Systems Engineering (OBSE); (2) Communicate the evolution of Systems Engineering practice; (3) Communicate the concepts of OBSE; (4) Communicate the roadblocks...

J. A. Fitch P. Mendonza

2011-01-01

183

Passive Cooling System for a Vehicle  

DOEpatents

A passive cooling system for a vehicle (114) transfers heat from an overheated internal component, for example, an instrument panel (100), to an external portion (116) of the vehicle (114), for example, a side body panel (126). The passive cooling system includes one or more heat pipes (112) having an evaporator section (118) embedded in the overheated internal component and a condenser section (120) at the external portion (116) of the vehicle (114). The evaporator (118) and condenser (120) sections are in fluid communication. The passive cooling system may also include a thermally conductive film (140) for thermally connecting the evaporator sections (118) of the heat pipes (112) to each other and to the instrument panel (100).

Hendricks, T. J.; Thoensen, T.

2005-11-15

184

Engineers recommend telecommunications system  

SciTech Connect

Engineers present the case for electric utilities developing an integrated telecommunications network which links its energy management, distribution automation, and load management systems with the utility's business computers over high-speed channels. The most important benefit would be the formation of a single utility-wide, real-time, distributed data base. The historical development of utilities has segmented their operations into generation, transmission, and distribution operations that are like a patchwork quilt that needs to be linked together. 1 figure.

Not Available

1985-08-01

185

Neural Systems Engineering  

Microsoft Academic Search

Biological brains and engineered electronic computers fall into different categories. Both are examples of complex information\\u000a processing systems, but beyond this point their differences outweigh their similarities. Brains are flexible, imprecise, error-prone\\u000a and slow; computers are inflexible, precise, deterministic and fast. The sets of functions at which each excels are largely\\u000a non-intersecting. They simply seem to be different types of

Steve Furber; Steve Temple

2008-01-01

186

Design of solar heating and cooling systems  

Microsoft Academic Search

This report presents a method for making an energy and an economic cost\\/benefit analysis of solar energy systems. A graphical method is presented for evaluating the performance of solar domestic hot water system, solar heating systems, and solar heating and cooling systems. Methods for selecting the optimum collector area based on benefit-to-cost ratio and for systematically making detailed design calculations

D. M. Joncich; D. J. Leverenz; D. C. Hittle; G. N. Walton

1978-01-01

187

Atmospheric impacts of evaporative cooling systems  

SciTech Connect

The report summarizes available information on the effects of various power plant cooling systems on the atmosphere. While evaporative cooling systems sharply reduce the biological impacts of thermal discharges in water bodies, they create (at least, for heat-release rates comparable to those of two-unit nuclear generating stations) atmospheric changes. For an isolated site such as required for a nuclear power plant, these changes are rather small and local, and usually environmentally acceptable. However, one cannot say with certainty that these effects will remain small as the number of reactors on a given site increases. There must exist a critical heat load for a specific site which, if exceeded, can create its own weather patterns, and thus create inadvertent weather changes such as rain and snow, severe thunderstorms, and tornadoes. Because proven mathematical models are not available, it is not now possible to forecast precisely the extent and frequency of the atmospheric effects of a particular heat-dissipation system at a particular site. Field research on many aspects of cooling system operation is needed in order to document and quantify the actual atmospheric changes caused by a given cooling system and to provide the data needed to develop and verify mathematical and physical models. The more important topics requiring field study are plume rise, fogging and icing (from certain systems), drift emission and deposition rates, chemical interactions, cloud and precipitation formation and critical heat-release rates.

Carson, J.E.

1976-10-01

188

Systems engineering: a practical approach for junior engineers  

Microsoft Academic Search

This paper discusses a recent engineering graduate's viewpoint(s) about his career with United States Air Force. He discusses the importance of undergraduate engineering disciplines being taught with respect to systems engineering guidelines. He discusses how systems engineering should also be taught from a practical viewpoint. If the systems engineering process is added to the traditional engineering curriculum, it should highlight

Samuel Burnham

2005-01-01

189

Passive cooling system for liquid metal cooled nuclear reactors with backup coolant flow path  

DOEpatents

A liquid metal cooled nuclear fission reactor plant having a passive auxiliary safety cooling system for removing residual heat resulting from fuel decay during reactor shutdown, or heat produced during a mishap. This reactor plant is enhanced by a backup or secondary passive safety cooling system which augments the primary passive auxiliary cooling system when in operation, and replaces the primary system when rendered inoperable.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1993-01-01

190

Energy Conservation via Solar Energy Application to Multi-Family and Commercial Structures. Volume III. An Energy, Engineering and Economic Analysis of Heating and Cooling Systems for Multi-Family Structures.  

National Technical Information Service (NTIS)

An energy analysis was made for a multi-family apartment model involving the heating, cooling, lumination and miscellaneous equipments energy consumption. The analysis compares various heating, ventilating and air conditioning (HVAC) systems with and with...

W. S. Fleming T. Bender T. Jagusztyn P. Parkman D. Sweetser

1977-01-01

191

Integrated mine cooling and water conditioning system  

SciTech Connect

A method is described comprising: cooling an aqueous liquid at ground level, by means of a refrigeration system which rejects heat, to produce an aqueous ice slurry of ice crystals in the aqueous liquid; separating ice from some of the aqueous ice slurry produced at ground level, washing the ice and melting the ice to produce potable water at ground level, and using the potable water hydrostatic energy to power hydraulic machinery at the location below ground level; feeding the aqueous ice slurry from ground level to a location substantially below ground level to cool that location by heat exchange with the slurry, thereby producing warm aqueous liquid; withdrawing the warm aqueous liquid from the location, returning it to ground level and then cooling the aqueous liquid by means of the refrigeration system to again convert it to an aqueous ice slurry; and recycling the slurry to the location substantially below ground level.

Husain, M.; Nail, J.A.

1988-06-14

192

Evaluation of three commercial microclimate cooling systems.  

PubMed

Three commercially available microclimate cooling systems were evaluated for their ability to reduce heat stress in men exercising in a hot environment while wearing high insulative, low permeability clothing. Five male volunteers performed three 180-min experiments (three repeats of 10 min rest, 50 min walking at 440 watts) in an environment of 38 degrees C dry bulb (Tdb), 12 degrees C dew point (Tdp). The cooling systems were: 1) ILC Dover Model 19 Coolvest (ILC), mean inlet temperature 5.0 degrees C; 2) LSSI Coolhead (LSSI), mean inlet temperature 14.5 degrees C; and 3) Thermacor Cooling Vest (THERM), mean inlet temperature 28.3 degrees C. Endurance time (ET), heart rate (HR), rectal temperature (Tre), mean skin temperature (Tsk), sweating rate (SR), rated perceived exertion (RPE), and thermal sensation (TS) were measured. A computer model prediction of ET with no cooling was 101 min. ET was greater (p less than 0.01) with ILC (178 min) than THERM (131 min) which was greater (p less than 0.01) than LSSI (83 min). The subjects self terminated on all LSSI tests because of headaches. Statistical analyses were performed on data collected at 60 min to have values on all subjects. There were no differences in HR, Tre, SR, or TS values among the cooling vests. The subjects' Tsk was lower (p less than 0.05) for the LSSI than THERM; and RPE values were higher (p less than 0.05) for LSSI than the other two vests. These data suggest an improved physiological response to exercise heat stress with all three commercial systems with the greatest benefit in performance time provided by the ILC cooling system. PMID:2302131

Cadarette, B S; DeCristofano, B S; Speckman, K L; Sawka, M N

1990-01-01

193

Performance of Active Solar Space-Cooling Systems: 1980 Cooling Season.  

National Technical Information Service (NTIS)

A detailed analysis of the solar absorption cooling process as represented by the NSDN system is presented. There is comprehensive data on eight solar cooling systems in the NSDN. Among these eight systems solar cooling by an absorption chiller is not a c...

D. Blum S. Frock T. Logee D. Missal P. Wetzel

1980-01-01

194

Simultaneous targeting and design for cooling water systems with multiple cooling water supplies  

Microsoft Academic Search

This paper presents a technique for simultaneous targeting and design in cooling water systems comprising of at least two cooling towers and several cooling water using operations. The presented technique is based on a superstructure from which a mathematical formulation is derived using system specific variables and parameters. It is demonstrated that in a system like this, true optimality can

Thokozani Majozi; Anand Moodley

2008-01-01

195

Boiler control systems engineering  

SciTech Connect

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

Gilman, J.

2005-07-01

196

Narcissus analysis for cooled staring IR system  

Microsoft Academic Search

Narcissus can have a deleterious effect on image quality for cooled infrared imaging systems. Therefore, analysis of narcissus is important for designing both scanning and staring optics. Narcissus is generally assumed to be negligible in staring IR optical designs because the shading effects can be removed by calibration of the detector array data. However, the calibration usually decreases sensitiveness of

Feng-Yun He; Ji-Cheng Cui; Shu-Long Feng; Xin Zhang

2007-01-01

197

Refined model of solar space cooling system  

Microsoft Academic Search

Computer simulation was used to study the feasibility of a solar-cooled residential housing unit in the Eastern Province of Saudi Arabia. The study has progressed through a series of system models; emphasis here is placed on the development of the refined model which describes the operation of the WF 36 absorption chiller. It is noted that the results of the

R. L. Jenks; A. Kremheller; W. A. Rogers; R. W. Jones

1978-01-01

198

Economics of solar heating and cooling systems  

Microsoft Academic Search

Solar heating and cooling for a private residence are discussed in terms of amortization time for a house with a 30 year mortgage at 8.5%. Different collector systems (tubular, flat, concentrating) and sizes are compared, with reference to their initial and life cycle costs. National energy savings are calculated for widespread use of solar power, which could reach the Quad

W. L. Corcoran

1978-01-01

199

Advanced fabrication techniques for hydrogen-cooled engine structures. Final report, October 1975-June 1982  

SciTech Connect

Described is a program for development of coolant passage geometries, material systems, and joining processes that will produce long-life hydrogen-cooled structures for scramjet applications. Tests were performed to establish basic material properties, and samples constructed and evaluated to substantiate fabrication processes and inspection techniques. Results of the study show that the basic goal of increasing the life of hydrogen-cooled structures two orders of magnitude relative to that of the Hypersonic Research Engine can be reached with available means. Estimated life is 19000 cycles for the channels and 16000 cycles for pin-fin coolant passage configurations using Nickel 201. Additional research is required to establish the fatigue characteristics of dissimilar-metal coolant passages (Nickel 201/Inconel 718) and to investigate the embrittling effects of the hydrogen coolant.

Buchmann, O.A.; Arefian, V.V.; Warren, H.A.; Vuigner, A.A.; Pohlman, M.J.

1985-11-01

200

Cooled baffle system for spaceborne infrared telescopes.  

PubMed

We report the design and testing of a compact system of baffles for cooled infrared telescopes. The baffle system consists of a reflecting forebaffle and a black aftbaffle and provides a high level of rejection of emission from off-axis sources. The forebaffle reflects radiation incident at angles greater than 40 off axis out of the telescope, thereby reducing the aperture heat load. The black aftbaffle absorbs radiation scattered or diffracted by the forebaffle, as well as radiation from sources within 40 off axis. We describe ground-based measurements at ? = 0.9 m of the baffle system at ambient temperature and rocketborne measurements at far-infrared wavelengths of the baffle system at ~3 K. The effective emissivity of the cooled forebaffle was measured to be 7 10(-3). The system has been successfully used in rocketborne measurements of the diffuse infrared background and will be used in the Infrared Telescope in Space. PMID:21037777

Bock, J J; Lange, A E; Matsuhara, H; Matsumoto, T; Onaka, T; Sato, S

1995-05-01

201

Pulse detonation engine test system  

Microsoft Academic Search

A test system of pulse detonation engine, based on PCI-6115 Data Acquisition Card and Front Integrated Instrument, Access databases and NI-Measurement Studio programming design suites in Windows. This test system is used to record the test data of pulse detonation engine and research the properties of detonation wave. Plenty of test data of pulse detonation engine which was recorded by

Xiaoming He; Jiankang Lu

2010-01-01

202

Thermostatically controlled solar heating and cooling system  

SciTech Connect

This patent describes a solar heating and cooling system for simultaneously heating or cooling an ambient air system within a building, heating a hot water supply for domestic use within the building and heating or cooling a swimming pool adjacent the building comprising a building. This comprises a swimming pool as a primary water source, a solar connector connected to the swimming pool, a heat pump for controlling ambient air temperature within the building, an energy conservation unit connected to the heat pump and to the hot water supply for utilizing hot gases from the heat pump to heat water in the hot water supply and an air heat exchanger connected to the air system and to the heat pump for selectively heating or cooling air in the building. Also a water heat exchanger is connected to a water source for selectively transferring heat between the heat pump and the water source, a well as a secondary water source connected to the water heat exchanger.

Yovanofski, T.

1986-12-16

203

Method for passive cooling liquid metal cooled nuclear reactors, and system thereof  

DOEpatents

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting from fuel decay during reactor shutdown. The passive cooling system comprises a plurality of partitions surrounding the reactor vessel in spaced apart relation forming intermediate areas for circulating heat transferring fluid which remove and carry away heat from the reactor vessel.

Hunsbedt, Anstein (Los Gatos, CA); Busboom, Herbert J. (San Jose, CA)

1991-01-01

204

Narcissus analysis for cooled staring IR system  

NASA Astrophysics Data System (ADS)

Narcissus can have a deleterious effect on image quality for cooled infrared imaging systems. Therefore, analysis of narcissus is important for designing both scanning and staring optics. Narcissus is generally assumed to be negligible in staring IR optical designs because the shading effects can be removed by calibration of the detector array data. However, the calibration usually decreases sensitiveness of the system and Narcissus variation may be noticeable for sensors when the conditions changes as follows: 1. warming and cooling the optical housing, 2. zooming optical elements, 3. movement of lenses for focus. In that case, it will result in shading and other image defects even after calibration. To minimize these effects, narcissus should be assessed and controlled during the design of staring array IR system. We provided a direct and fast method for analyzing the narcissus variation in the presence of software such as LightTools, TracePro and ASAP, and proposed the principles in optical design of staring IR systems to reduce narcissus. A cooled staring IR system with serious narcissus was estimated and reoptimized. Narcissus analysis of this IR system confirmed the efficiency of the analysis method.

He, Feng-Yun; Cui, Ji-Cheng; Feng, Shu-Long; Zhang, Xin

2007-12-01

205

A Smart Multiple-Loop Automotive Cooling SystemModel, Control, and Experimental Study  

Microsoft Academic Search

The integration of computer-controlled electro-mechanical components in ground vehicle cooling systems can improve coolant temperature regulation and servomotor power consumption. Advanced thermal management systems for internal combustion engines can better regulate the combustion process by harmoniously controlling the cooling system's actuators to obtain desired thermal conditions in a power-efficient manner. In this paper, a comprehensive nonlinear control architecture is proposed

Mohammad H. Salah; Thomas H. Mitchell; John R. Wagner; Darren M. Dawson

2010-01-01

206

TWRS Systems Engineering Working Plan  

Microsoft Academic Search

The purpose of this Systems Engineering (SE) Working Plan (SEWP) is to describe how the Westinghouse Hanford Company (WHC) Tank Waste Remediation System (TWRS) will implement the SE polity and guidance provided in the Tank Waste Remediation System (TWRS) Systems Engineering Management Plan (SEMP). Sections 2.0 through 4.0 cover how the SE process and management will be performed to develop

Eiholzer

1994-01-01

207

Internal combustion engine control system  

US Patent & Trademark Office Database

A control system for an internal combustion engine includes a virtual engine model which mathematically represents the states of the engine in real time, but which is programmed to provide the engine's states at least a fraction of an engine cycle (and preferably at least one-fourth of an engine cycle, i.e., one stroke) to several engine cycles in advance of the real engine. The mass flow entering and leaving the cylinder is modeled, allowing parameters such as the mass of air per cylinder (MAC) and residual exhaust gas to be computed, and thereafter used to generate engine control commands related to fuel injection (air/fuel ratio), spark advance, and so forth.

2007-10-02

208

Cooling of Turbine Engines By the use of Pin Fin Arrays  

Microsoft Academic Search

Without proper cooling of a turbine engine, its blades would fail under the extreme heat created by the internal combustion gases. There are many factors that are involved in this cooling process, for instance its location while operating or the use of fins. The factor that I am exploring, deals with expanding the surface area of the blade without changing

Alexander Martinez

209

Steam powered heating/cooling systems  

SciTech Connect

A cooling system is described having a boiler, a heat source for the boiler including a burner, an absorption machine having a generator section and an absorber section, a steam trap for the generator section of the absorption machine, a condensate tank with a vent line to atmosphere and work to be heated. The cooling system consists of a steam supply line from the boiler to the generator section of the absorption machine; a condensate return line from the generator section of the absorption machine through the steam trap to the condensate tank; a return line from the condensate tank to the boiler; and outlet supply line from the absorption section of the absorption machine to the work; a return line from the work to the absorption section of the absorption machine; and a condensate return pump on the return line from the condensate tank to the boiler.

Perry, J.E.

1987-05-19

210

A gas-cooled reactor surface power system  

SciTech Connect

A human outpost on Mars requires plentiful power to assure survival of the astronauts. Anywhere from 50 to 500 kW of electric power (kWe) will be needed, depending on the number of astronauts, level of scientific activity, and life-cycle closure desired. This paper describes a 250-kWe power system based on a gas-cooled nuclear reactor with a recuperated closed Brayton cycle conversion system. The design draws upon the extensive data and engineering experience developed under the various high-temperature gas cooled reactor programs and under the SP-100 program. The reactor core is similar in power and size to the research reactors found on numerous university campuses. The fuel is uranium nitride clad in Nb1{percent}Zr, which has been extensively tested under the SP-100 program. The fuel rods are arranged in a hexagonal array within a BeO block. The BeO softens the spectrum, allowing better use of the fuel and stabilizing the geometry against deformation during impact or other loadings. The system has a negative temperature feedback coefficient so that the power level will automatically follow a variable load without the need for continuous adjustment of control elements. Waste heat is removed by an air-cooled heat exchanger using cold Martian air. The amount of radioactivity in the reactor at launch is very small (less than a Curie, and about equal to a truckload of uranium ore). The system will need to be engineered so that criticality can not occur for any launch accident. This system is also adaptable for electric propulsion or life-support during transit to and from Mars. {copyright} {ital 1999 American Institute of Physics.}

Lipinski, R.J.; Wright, S.A.; Lenard, R.X.; Harms, G.A. [Sandia National Laboratories, MS-1146, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)

1999-01-01

211

A gas-cooled reactor surface power system  

NASA Astrophysics Data System (ADS)

A human outpost on Mars requires plentiful power to assure survival of the astronauts. Anywhere from 50 to 500 kW of electric power (kWe) will be needed, depending on the number of astronauts, level of scientific activity, and life-cycle closure desired. This paper describes a 250-kWe power system based on a gas-cooled nuclear reactor with a recuperated closed Brayton cycle conversion system. The design draws upon the extensive data and engineering experience developed under the various high-temperature gas cooled reactor programs and under the SP-100 program. The reactor core is similar in power and size to the research reactors found on numerous university campuses. The fuel is uranium nitride clad in Nb1%Zr, which has been extensively tested under the SP-100 program. The fuel rods are arranged in a hexagonal array within a BeO block. The BeO softens the spectrum, allowing better use of the fuel and stabilizing the geometry against deformation during impact or other loadings. The system has a negative temperature feedback coefficient so that the power level will automatically follow a variable load without the need for continuous adjustment of control elements. Waste heat is removed by an air-cooled heat exchanger using cold Martian air. The amount of radioactivity in the reactor at launch is very small (less than a Curie, and about equal to a truckload of uranium ore). The system will need to be engineered so that criticality can not occur for any launch accident. This system is also adaptable for electric propulsion or life-support during transit to and from Mars.

Lipinski, Ronald J.; Wright, Steven A.; Lenard, Roger X.; Harms, Gary A.

1999-01-01

212

A Gas-Cooled Reactor Surface Power System  

SciTech Connect

A human outpost on Mars requires plentiful power to assure survival of the astronauts. Anywhere from 50 to 500 kW of electric power (kWe) will be needed, depending on the number of astronauts, level of scientific activity, and life- cycle closure desired. This paper describes a 250-kWe power system based on a gas-cooled nuclear reactor with a recuperated closed Brayton cycle conversion system. The design draws upon the extensive data and engineering experience developed under the various high-temperature gas cooled reactor programs and under the SP-100 program. The reactor core is similar in power and size to the research reactors found on numerous university campuses. The fuel is uranium nitide clad in Nb 1 %Zr, which has been extensively tested under the SP-I 00 program The fiel rods are arranged in a hexagonal array within a BeO block. The BeO softens the spectrum, allowing better use of the fbel and stabilizing the geometty against deformation during impact or other loadings. The system has a negative temperature feedback coefficient so that the power level will automatically follow a variable load without the need for continuous adjustment of control elements. Waste heat is removed by an air-cooled heat exchanger using cold Martian air. The amount of radioactivity in the reactor at launch is very small (less than a Curie, and about equal to a truckload of uranium ore). The system will need to be engineered so that criticality cannot occur for any launch accident. This system is also adaptable for electric propulsion or life-support during transit to and from Mars.

Harms, G.A.; Lenard, R.X.; Lipinski, R.J.; Wright, S.A.

1998-11-09

213

A gas-cooled reactor surface power system  

SciTech Connect

A human outpost on Mars requires plentiful power to assure survival of the astronauts. Anywhere from 50 to 500 kW of electric power (kWe) will be needed, depending on the number of astronauts, level of scientific activity, and life-cycle closure desired. This paper describes a 250-kWe power system based on a gas-cooled nuclear reactor with a recuperated closed Brayton cycle conversion system. The design draws upon the extensive data and engineering experience developed under the various high-temperature gas cooled reactor programs and under the SP-100 program. The reactor core is similar in power and size to the research reactors found on numerous university campuses. The fuel is uranium nitride clad in Nb1%Zr, which has been extensively tested under the SP-100 program. The fuel rods are arranged in a hexagonal array within a BeO block. The BeO softens the spectrum, allowing better use of the fuel and stabilizing the geometry against deformation during impact or other loadings. The system has a negative temperature feedback coefficient so that the power level will automatically follow a variable load without the need for continuous adjustment of control elements. Waste heat is removed by an air-cooled heat exchanger using cold Martian air. The amount of radioactivity in the reactor at launch is very small (less than a Curie, and about equal to a truckload of uranium ore). The system will need to be engineered so that criticality can not occur for any launch accident. This system is also adaptable for electric propulsion or life-support during transit to and from Mars.

Lipinski, Ronald J.; Wright, Steven A.; Lenard, Roger X.; Harms, Gary A. [Sandia National Laboratories, MS-1146, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)

1999-01-22

214

Survey and Alignment of the Fermilab Electron Cooling System  

SciTech Connect

The goal of achieving the Tevatron luminosity of 3 x 10{sup 32} cm{sup -2}s{sup -1} requires Electron Cooling in the Recycler Ring to provide an increased flux of antiprotons. The Fermilab Electron Cooling system has been designed to assist accumulation of antiprotons for the Tevatron collider operations. The installation along with the survey and alignment of the Electron Cooling system in the Recycler Ring were completed in November 2004. The Electron Cooling system was fully commissioned in May 2005 and the first cooling of antiprotons was achieved in July 2005. This paper discusses the alignment methodology employed to survey and align the Electron Cooling system.

Oshinowo, Babatunde O'Sheg; Leibfritz, Jerry; /Fermilab

2006-09-01

215

Evaluation of geothermal cooling systems for Arizona  

SciTech Connect

Arizona consumes nearly 50 percent more electricity during the peak summer season of May through part of October, due to the high cooling load met by electrical-driven air conditioning units. This study evaluates two geothermal-driven cooling systems that consume less electricity, namely, absorption cooling and heat pumps. Adsorption cooling requires a geothermal resource above 105{sup 0}C (220{sup 0}F) in order to operate at a reasonable efficiency and capacity. Geothermal resources at these temperatures or above are believed existing in the Phoenix and Tucson areas, but at such depths that geothermal-driven absorption systems have high capital investments. Such capital investments are uneconomical when paid out over only five months of operation each year, but become economical when cascaded with other geothermal uses. There may be other regions of the state, where geothermal resources exist at 105{sup 0}C (220{sup 0}F) or higher at much less depth, such as the Casa Grande/Coolidge or Hyder areas, which might be attractive locations for future plants of the high-technology industries. Geothermal assisted heat pumps have been shown in this study to be economical for nearly all areas of Arizona. They are more economical and reliable than air-to-air heat pumps. Such systems in Arizona depend upon a low-temperature geothermal resource in the narrow range of 15.5 to 26.6{sup 0}C (60 to 80{sup 0}F), and are widely available in Arizona. The state has over 3000 known (existing) thermal wells, out of a total of about 30,000 irrigation wells.

White, D.H.; Goldstone, L.A.

1982-08-01

216

Improving thermal efficiency by reducing cooling losses in hydrogen combustion engines  

Microsoft Academic Search

Hydrogen can be readily used in spark ignition engines as a clean alternative to fossil fuels. However, the higher burning velocity and shorter quenching distance of hydrogen compared with hydrocarbons cause a larger heat transfer from the burning gas to the combustion chamber walls. Because of this cooling loss, the thermal efficiency of hydrogen-fueled engines is sometimes lower than that

Toshio Shudo

2007-01-01

217

Noise Reduction of the Engine Cooling Fan Used in Large Bus  

Microsoft Academic Search

Acoustic considerations of axial flow fans become imperative due to regulations and the ubiquitous call for environment-friendly products. This paper suggests a noise reduction method for the engine cooling fan. This engineering model has been developed for the prediction of the noise spectrum of an axial flow fan. The radiated acoustic pressure is expressed as the discrete frequency noise peaks

Yong-Goo Joe; Jae-Eung Oh; You-Yub Lee; Choong-Hwi Lee; Hyoun-Jin Sim

2004-01-01

218

Time resolved numerical modeling of oil jet cooling of a medium duty diesel engine piston  

Microsoft Academic Search

In medium to heavy duty diesel engines, ever increasing power densities are threatening piston's structural integrity at high engine loads and speeds. This investigation presents the computational results of the heat transfer between piston and an impinging oil jet, typically used to keep the pistons cool. Appropriate boundary conditions are applied and using numerical modeling, heat transfer coefficient (h) at

Avinash Kumar Agarwal; Sandeep Kumar Goyal; Dhananjay Kumar Srivastava

2011-01-01

219

System identification of jet engines  

SciTech Connect

System identification plays an important role in advanced control systems for jet engines, in which controls are performed adaptively using data from the actual engine and the identified engine. An identification technique for jet engine using the Constant Gain Extended Kalman Filter (CGEKF) is described. The filter is constructed for a two-spool turbofan engine. The CGEKF filter developed here can recognize parameter change in engine components and estimate unmeasurable variables over whole flight conditions. These capabilities are useful for an advanced Full Authority Digital Electric Control (FADEC). Effects of measurement noise and bias, effects of operating point and unpredicted performance change are discussed. Some experimental results using the actual engine are shown to evaluate the effectiveness of CGEKF filter.

Sugiyama, N.

2000-01-01

220

Stirling engine heating system  

SciTech Connect

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

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

1988-06-28

221

Design of panel heating and cooling systems  

SciTech Connect

Panel heating and cooling systems use controlled temperature surfaces in the floor, walls, or ceiling of a conditioned space. The temperature is maintained by a circulating fluid through a circuit embedded in the panel. Heat transfer occurs by radiation and convection to or from a room. The performance of these systems may be determined by design calculations or testing. Thermal testing and system analysis by experiments are costly and inefficient. For different closed panel systems, finite element-based models and programs were developed by which temperature distribution in the construction, interdependence between performance and mean carrier fluid temperature, panel surface temperature, and room temperature can be calculated. One single power function product of all relevant parameters has been derived as an algorithm for performance calculations of panel heating and cooling systems, which can be adapted for other systems. Findings have been verified by experiment for floor heating panels with best results. These basic equations provided the design standards for German Standard DIN 4725, ''Thermal Output of Floor Heating'', which has been adopted as European Standard EN 1264. Finite element method calculation results were also compared with results from design calculations based on the ASHRAE method.

Bohle, J.; Klan, H.

2000-07-01

222

APPLICATION OF TURBOMACHINERY IN SOLAR-ASSISTED RANKINE COOLING SYSTEMS  

Microsoft Academic Search

This report presents the results of a preliminary study concerning the use of high speed turbomachinery in a solar-assisted Rankine cooling cycle. The use of Rankine cycles in solar powered cooling of buildings involves a solar collector to provide energy to heat and vaporize a working fluid. Energy is extracted from this vapor in an expansion engine that is used

Leech

1976-01-01

223

NASA Marshall Space Flight Center Improves Cooling System Performance: Best Management Practice Case Study #10: Cooling Towers (Fact Sheet)  

SciTech Connect

National Aeronautics and Space Administration's (NASA) Marshall Space Flight Center (MSFC) has a longstanding sustainability program that revolves around energy and water efficiency as well as environmental protection. MSFC identified a problematic cooling loop with six separate compressor heat exchangers and a history of poor efficiency. The facility engineering team at MSFC partnered with Flozone Services, Incorporated to implement a comprehensive water treatment platform to improve the overall efficiency of the system.

Not Available

2011-02-01

224

Automotive Stirling Engine systems development  

SciTech Connect

The objective of the Automotive Stirling Engine (ASE) program is to develop a Stirling engine for automotive use that provides a 30% improvement in fuel economy relative to a comparable internal-combustion engine while meeting emissions goals. This paper traces the engine systems' development efforts focusing on: 1) a summary of engine system performance for all Mod I engines; 2) the development program conducted for the upgraded Mod I; and 3) vehicle systems work conducted to enhance vehicle fuel economy. Problems encountered during the upgraded Mod I test program are discussed. The importance of the EPA driving cycle cold-start penalty and the measures taken to minimize that penalty with the Mod II are also addressed. The design of an engine intended to meet the program objectives (Mod II) was initiated based on the Reference Engine System Design (RESD)*, which is a departure from existing program engines in that it is a Vee design with an annular regenerator/cooler arrangement, as opposed to the existing U-cannister configuration. The development is expected to take place over an approximate four-year time period, culminating in a vehicle demonstration of fuel economy that meets program goals. This paper presents the performance development of the ASE Program engines. Results obtained with the initial P-40 engines are presented, and Mod I engine performance and vehicle fuel economy measurements are discussed. The actions taken on the upgraded Mod I program are detailed, and the results presented. The Mod II engine design is reviewed, and projections for that system are presented. Accomplishments achieved within the ASE Program since its inception are also summarized.

Richey, A.E.

1984-08-01

225

Experimental measurement on characteristics of cool storage air conditioning system  

NASA Astrophysics Data System (ADS)

The experimental apparatus of cool storage air conditioning system is designed and constructed. The characteristics of cool storage air-conditioning system are experimentally measured. The temperature variation of coolant in the evaporator is presented by experiments. The refrigerant temperature in the evaporator and the compressor discharge temperature are also shown. The cool storage experiments are carried out to measure the refrigeration capacity of the chiller in cool storage mode, and the cool storage capacity in the storage tank. The measured results show that the coolant temperature difference between inlet and outlet in the evaporator, the refrigerant evaporating temperature, discharging temperature of the compressor and the refrigeration capacity of the chiller during cool storage period can maintain stable. The cool storage capacity in the storage tank approximately increases in linearity with cool storage time. This indicates the cool storage air conditioning system can stably operate.

Fang, Guiyin; Yang, Fan; Zhang, Man; Wu, Shuangmao

2008-12-01

226

Cooling performance of a water-cooling panel system for modular high-temperature gas-cooled reactors  

Microsoft Academic Search

Experiments on a water cooling panel system were performed to investigate its heat removal performance and the temperature distribution of components for a modular high-temperature gas-cooled reactor (MHTGR). The analytical code THANPACST2 was applied to analyze the experimental results to verify the validity of the analytical method and the model.

Shoji Takada; Kunihiko Suzuki; Yoshiyuki Inagaki; Yukio Sudo

1995-01-01

227

Solar hybrid cooling system for high-tech offices in subtropical climate Radiant cooling by absorption refrigeration and desiccant dehumidification  

Microsoft Academic Search

A solar hybrid cooling design is proposed for high cooling load demand in hot and humid climate. For the typical building cooling load, the system can handle the zone cooling load (mainly sensible) by radiant cooling with the chilled water from absorption refrigeration, while the ventilation load (largely latent) by desiccant dehumidification. This hybrid system utilizes solar energy for driving

K. F. Fong; T. T. Chow; C. K. Lee; Z. Lin; L. S. Chan

2011-01-01

228

A passive evaporative cooling system by natural ventilation  

Microsoft Academic Search

Evaporative cooling is used extensively for cooling in climates with medium to low humidity. In residential buildings the conventional mechanical systems tend to be both noisy and unsightly protuberances on buildings, whilst traditional cooling systems incorporated into the building structure which employ chimneys and the like tend to be designed for the specific building and so may not have wide

Zahra Giabaklou; John A. Ballinger

1996-01-01

229

Electromechanically cooled germanium radiation detector system  

NASA Astrophysics Data System (ADS)

We have successfully developed and fielded an electromechanically cooled germanium radiation detector (EMC-HPGe) at Lawrence Livermore National Laboratory (LLNL). This detector system was designed to provide optimum energy resolution, long lifetime, and extremely reliable operation for unattended and portable applications. For most analytical applications, high purity germanium (HPGe) detectors are the standard detectors of choice, providing an unsurpassed combination of high energy resolution performance and exceptional detection efficiency. Logistical difficulties associated with providing the required liquid nitrogen (LN) for cooling is the primary reason that these systems are found mainly in laboratories. The EMC-HPGe detector system described in this paper successfully provides HPGe detector performance in a portable instrument that allows for isotopic analysis in the field. It incorporates a unique active vibration control system that allows the use of a Sunpower Stirling cycle cryocooler unit without significant spectral degradation from microphonics. All standard isotopic analysis codes, including MGA and MGA++[1], GAMANL[2], GRPANL[3] and MGAU[4], typically used with HPGe detectors can be used with this system with excellent results. Several national and international Safeguards organisations including the International Atomic Energy Agency (IAEA) and U.S. Department of Energy (DOE) have expressed interest in this system. The detector was combined with custom software and demonstrated as a rapid Field Radiometric Identification System (FRIS) for the U.S. Customs Service [5]. The European Communities' Safeguards Directorate (EURATOM) is field-testing the first Safeguards prototype in their applications. The EMC-HPGe detector system design, recent applications, and results will be highlighted.

Lavietes, A. D.; Joseph Mauger, G.; Anderson, E. H.

1999-02-01

230

Engineering Drawing System.  

National Technical Information Service (NTIS)

The main purpose of this manual is to present the standard practices and information required in the preparation of engineering drawings. The basic requirements for all drawings and specifications are delineated. Instructions are presented for preparing s...

1978-01-01

231

Engineering developments for sodium heat engine systems  

NASA Astrophysics Data System (ADS)

The authors report preliminary results of testing and analysis of the stresses induced in tubular beta-double prime-alumina solid electrolyte (BASE) membranes as used in sodium heat engine (SHE) cells due to thermal gradients, neutral sodium absorption in the surfaces and bulk material and residual stresses remaining from tube manufacture. The authors report results from experiments conducted on a recirculating single tube vapor-fed cell module operated continuously under load for 850. The electromagnetic pump system used to recirculate the sodium working fluid for this test cell was redesigned and its performance is also discussed.

Hunt, T. K.; Pantolin, J.; Sievers, R. K.; Kummer, J. T.; Novak, Robert F.

232

Efficiency and its bounds for thermal engines at maximum power using Newton's law of cooling.  

PubMed

We study a thermal engine model for which Newton's cooling law is obeyed during heat transfer processes. The thermal efficiency and its bounds at maximum output power are derived and discussed. This model, though quite simple, can be applied not only to Carnot engines but also to four other types of engines. For the long thermal contact time limit, new bounds, tighter than what were known before, are obtained. In this case, this model can simulate Otto, Joule-Brayton, Diesel, and Atkinson engines. While in the short contact time limit, which corresponds to the Carnot cycle, the same efficiency bounds as that from Esposito et al. [Phys. Rev. Lett. 105, 150603 (2010)] are derived. In both cases, the thermal efficiency decreases as the ratio between the heat capacities of the working medium during heating and cooling stages increases. This might provide instructions for designing real engines. PMID:22400551

Yan, H; Guo, Hao

2012-01-27

233

Efficiency and its bounds for thermal engines at maximum power using Newton's law of cooling  

NASA Astrophysics Data System (ADS)

We study a thermal engine model for which Newton's cooling law is obeyed during heat transfer processes. The thermal efficiency and its bounds at maximum output power are derived and discussed. This model, though quite simple, can be applied not only to Carnot engines but also to four other types of engines. For the long thermal contact time limit, new bounds, tighter than what were known before, are obtained. In this case, this model can simulate Otto, Joule-Brayton, Diesel, and Atkinson engines. While in the short contact time limit, which corresponds to the Carnot cycle, the same efficiency bounds as that from Esposito [Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett.105.150603 105, 150603 (2010)] are derived. In both cases, the thermal efficiency decreases as the ratio between the heat capacities of the working medium during heating and cooling stages increases. This might provide instructions for designing real engines.

Yan, H.; Guo, Hao

2012-01-01

234

Management issues in systems engineering  

Microsoft Academic Search

When applied to a system, the doctrine of successive refinement is a divide-and-conquer strategy. Complex systems are sucessively divided into pieces that are less complex, until they are simple enough to be conquered. This decomposition results in several structures for describing the product system and the producing system. These structures play important roles in systems engineering and project management. Many

Robert Shishko; Robert G. Chamberlain; Robert Aster; Vincent Bilardo; Kevin Forsberg; Hal Mooz; Lou Polaski; Ron Wade

1993-01-01

235

40 CFR 1065.122 - Engine cooling and lubrication.  

Code of Federal Regulations, 2013 CFR

...1). (c) Lubricating oil. Use lubricating oils specified in § 1065.740. For two-stroke engines that involve a specified mixture of fuel and lubricating oil, mix the lubricating oil with the fuel according to the manufacturer's...

2013-07-01

236

Energy saving possibilities with cooled-ceiling systems  

Microsoft Academic Search

Based on hour-by-hour simulation studies, this paper presents the annual energy consumption characteristics of water-panel type cooled-ceiling systems in comparison with conventional all-air systems. In particular, some unique energy saving measures associated with cooled-ceiling systems are numerically studied. The results indicate that a cooled-ceiling system can save much of the fan energy required in all-air systems, and that in the

J. Niu; J. v. d. Kooi; H. v. d. Rhee

1995-01-01

237

New Directions for Evaporative Cooling Systems.  

ERIC Educational Resources Information Center

|New energy saving technology can be applied to older cooling towers; in addition, evaporative chilling, a process that links a cooling tower to the chilling equipment, can reduce energy use by 80 percent. (Author/MLF)|

Robison, Rita

1981-01-01

238

Nonwater Quality Impacts of Closed-Cycle Cooling Systems and the Interaction of Stack Gas and Cooling Tower Plumes.  

National Technical Information Service (NTIS)

The report gives results of a literature survey of the nonwater quality impacts of closed-cycle cooling systems. Following discussions of cooling tower and stack gas plumes, interactions of these plumes are considered. For cooling tower plumes, plume type...

G. A. Englesson M. C. Hu

1979-01-01

239

Cooling and shielding systems for infrared detectors - requirements and limits  

Microsoft Academic Search

This paper presents three main cooling systems used for infrared detectors. At first thermoelectric devices are discussed. They allow cooling down the detector with low efficiency and not to the very low temperature. They do not generate any vibrations and therefore are suitable for thermal detectors, where the microphone effect can decrease their performance. Photon detectors need to be cooled

B. Wiecek

2005-01-01

240

Cooling system. [salt solution evaporation and solar energy  

Microsoft Academic Search

A cooling system for air conditioning of buildings is described which comprises creating a cold medium by dissolving a salt in water, said salt being characterized by forming an endothermic solution, passing air through or over said cold solution to cool the air before introduction into said building. After the potential cooling effect is exhausted the salt is recovered by

Telkes

1977-01-01

241

System Modeling of Gas Engine Driven Heat Pump  

SciTech Connect

To improve the system performance of the GHP, modeling and experimental study has been made by using desiccant system in cooling operation (particularly in high humidity operations) and suction line waste heat recovery to augment heating capacity and efficiency. The performance of overall GHP system has been simulated by using ORNL Modulating Heat Pump Design Software, which is used to predict steady-state heating and cooling performance of variable-speed vapor compression air-to-air heat pumps for a wide range of operational variables. The modeling includes: (1) GHP cycle without any performance improvements (suction liquid heat exchange and heat recovery) as a baseline (both in cooling and heating mode), (2) the GHP cycle in cooling mode with desiccant system regenerated by waste heat from engine incorporated, (3) GHP cycle in heating mode with heat recovery (recovered heat from engine). According to the system modeling results, by using desiccant system regenerated by waste heat from engine, the SHR can be lowered to 40%. The waste heat of the gas engine can boost the space heating efficiency by 25% in rated operating conditions.

Mahderekal, Isaac [Oak Ridge National Laboratory (ORNL); Shen, Bo [ORNL; Vineyard, Edward [Oak Ridge National Laboratory (ORNL)

2012-01-01

242

Open cycle lithium chloride cooling system  

NASA Astrophysics Data System (ADS)

A lithium chloride open cycle absorption chiller has been designed, built and tested. Solution reconcentration takes place in a small counter current packed column supplied with solar heated air. Removal of noncondensable gases that enter the chiller dissolved in the strong solution and the make-up refrigerant streams is accomplished by a liquid-jet ejector and a small vacuum pump. Cooling capacities approaching 1.4 tons and COP levels of 0.58 have been achieved at non-optimum operating conditions. Test results from preliminary system operation suggest that mass transfer processes in both the packed column reconcentrator and the absorber are controlled by concentration gradients in the lithium chloride solution. Liquid phase controlled mass transfer dictates an operating strategy different from the previously assumed gas phase controlled process to obtain maximum rates of evaporation in the packed column. Determination of optimal operating conditions leading to decreased electrical power consumption and improved cooling capacity and coefficient of performance will require further analysis and testing.

Lenz, T. G.; Loef, G. O. G.; Iyer, R.; Wenger, J.

1983-05-01

243

Energy Systems Engineering Technician Curriculum  

NSDL National Science Digital Library

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

2010-06-07

244

Test Results of an Engineering Model 2-stage Pulse Tube Cryocooler for Cooling at 75 K and 130 K  

NASA Astrophysics Data System (ADS)

Under contract with the Space Dynamics Laboratory, Lockheed Martin's Advanced Technology Center (LM-ATC) has built and tested the two-stage Engineering Model of a space flight pulse tube cryocooler, which provides simultaneous cooling at 75 K and 130 K. The cryocooler is robust and simple, consisting of a two-stage coldhead with no moving parts, driven by a linear flexure-bearing compressor and powered by a high-efficiency electronic controller that includes ripple suppression and vibration cancellation. A distance of up to one meter separates the coldhead and compressor. The cryocooler was designed to simultaneously provide 0.75 W of cooling at 75 K and 6 W cooling at 130 K while conductively rejecting heat at 313 K. Total system power is 125 W. Performance data is presented, showing excellent cryocooler performance.

Frank, D.; Olson, J.; Roth, E.

2006-04-01

245

Regeneratively Cooled Rocket Engine for Space Storable Propellants.  

National Technical Information Service (NTIS)

Analyses and experimental studies were performed with the OF2 (F2/O2)/B2H6 propellant combination over a range in operating conditions to determine suitability for a space storable pressure fed engine configuration for an extended flight space vehicle con...

B. J. Waldman W. R. Wagner

1973-01-01

246

Modeling of nucleate boiling in engine cylinder head cooling ducts  

Microsoft Academic Search

The merits of various existing 1D models for nucleate subcooled boiling heat transfer are assessed. The implementation of these models is occasionally not straightforward. Some physical inconsistencies have been identified in these models. Surprisingly, the Chen correlation predicts the measurements best, in particular for data sets with heat fluxes in the range of a diesel engine.

J. P. Kroes; Velthooven van E

2008-01-01

247

V-type engine boiling and cooling apparatus  

Microsoft Academic Search

An internal combustion engine is described comprising: a radiator; means for forming a first combustion chamber; means for forming a first coolant chamber around the first combustion chamber, the first coolant chamber being adapted to discharge vaporized coolant; means for forming a second combustion chamber; means for forming a second coolant chamber around the second combustion chamber, the second coolant

Hayashi

1987-01-01

248

User Engineering: A New Look at System Engineering.  

National Technical Information Service (NTIS)

User Engineering is a new System Engineering perspective responsible for defining and maintaining the user view of the system. Its elements are a process to guide the project and customer, a multidisciplinary team including hard and soft sciences, rapid p...

L. L. McLaughlin

1987-01-01

249

Engineering the Lymphatic System  

PubMed Central

The recent advances in our understanding of lymphatic physiology and the role of the lymphatics in actively regulating fluid balance, lipid transport, and immune cell trafficking has been furthered in part through innovations in imaging, tissue engineering, quantitative biology, biomechanics, and computational modeling. Interdisciplinary and bioengineering approaches will continue to be crucial to the progression of the field, given that lymphatic biology and function are intimately woven with the local microenvironment and mechanical loads experienced by the vessel. This is particularly the case in lymphatic diseases such as lymphedema where the microenvironment can be drastically altered by tissue fibrosis and adipocyte accumulation. In this review we will highlight contributions engineering and mechanics have made to lymphatic physiology and will discuss areas that will be important for future research.

Nipper, Matthew E.

2011-01-01

250

Natural circulating passive cooling system for nuclear reactor containment structure  

DOEpatents

A passive cooling system for the contaminant structure of a nuclear reactor plant providing protection against overpressure within the containment attributable to inadvertent leakage or rupture of the system components. The cooling system utilizes natural convection for transferring heat imbalances and enables the discharge of irradiation free thermal energy to the atmosphere for heat disposal from the system.

Gou, Perng-Fei (Saratoga, CA); Wade, Gentry E. (Saratoga, CA)

1990-01-01

251

Passive cooling system for nuclear reactor containment structure  

DOEpatents

A passive cooling system for the contaminant structure of a nuclear reactor plant providing protection against overpressure within the containment attributable to inadvertent leakage or rupture of the system components. The cooling system utilizes natural convection for transferring heat imbalances and enables the discharge of irradiation free thermal energy to the atmosphere for heat disposal from the system.

Gou, Perng-Fei (Saratoga, CA); Wade, Gentry E. (Saratoga, CA)

1989-01-01

252

Electronics Cooling Using a Self-Contained, Sub-Cooled Pumped Liquid System  

Microsoft Academic Search

Electronic thermal packaging design continues to look for novel solutions for enhancing the performance of microelectronic cooling solutions. Driven by increasing thermal performance requirements, particularly in densely packaged militarized electronic systems and other high density or extreme use products, thermal designers are showing that to achieve the necessary cooling, combinations of existing technologies may offer further enhancement than has already

W. John Bilski; Gregg Baldassarre; Matt Connors; Jerry Toth; Kevin L. Wert

2008-01-01

253

Cooling system using an oil-in-alcohol containing consolute antifreeze composition  

Microsoft Academic Search

This patent describes a method of cooling an internal combustion engine which comprises contacting hot metal portions of an operating internal combustion engine coolant system with an oil-in-alcohol containing consolute and antifreeze composition thereby rasing the temperature of the antifreeze to at least a cloud point of about 40°C., thereby causing the oil in the consolute antifreeze composition to become

E. D. Goddard; P. S. Leung; P. H. Mohr

1986-01-01

254

Study on Temporary Space Cooling System using Ice  

NASA Astrophysics Data System (ADS)

In this study, a temporary space cooling system using ice was evaluated for the simple cooling of spaces, such as prefabricated buildings and tents used for events and at times of disaster, and analysis and experiments were conducted concerning the system. First, the concept of this system was established. Two types of cooling methods - natural and forced circulation - were adopted. Next, the cooling capacity was predicted by calculation. Measurement results were also presented concerning the cooling capacity of the forced circulation-type system in a temporary tent. Furthermore, this system was actually tested on a temporary tent and a prefabricated building and demonstration experiments were conducted. The operation results were indicated and the cooling capacity was evaluated.

Nagata, Tsutomu; Hamada, Yasuhiro; Itoh, Yuki; Kubota, Hideki; Ono, Takayuki; Hashimoto, Yoshiaki

255

Potential of solar cooling systems for peak demand reduction  

SciTech Connect

We investigated the technical feasibility of solar cooling for peak demand reduction using a building energy simulation program (DOE2.1D). The system studied was an absorption cooling system with a thermal coefficient of performance of 0.8 driven by a solar collector system with an efficiency of 50% with no thermal storage. The analysis for three different climates showed that, on the day with peak cooling load, about 17% of the peak load could be met satisfactorily with the solar-assisted cooling system without any thermal storage. A performance availability analysis indicated that the solar cooling system should be designed for lower amounts of available solar resources that coincide with the hours during which peak demand reduction is required. The analysis indicated that in dry climates, direct-normal concentrating collectors work well for solar cooling; however, in humid climates, collectors that absorb diffuse radiation work better.

Pesaran, A.A. [National Renewable Energy Lab., Golden, CO (United States); Neymark, J. [Neymark (Joel), Golden, CO (United States)

1994-11-01

256

Analytical and experimental studies of heat pipe radiation cooling of hypersonic propulsion systems  

Microsoft Academic Search

Preliminary, research-oriented, analytical and experimental studies were completed to assess the feasibility of using high-temperature heat pipes to cool hypersonic engine components. This new approach involves using heat pipes to transport heat away from the combustor, nozzle, or inlet regions, and to reject it to the environment by thermal radiation from an external heat pipe nacelle. For propulsion systems using

R. A. Martin; M. A. Merrigan; M. G. Elder; J. T. Sena; E. S. Keddy; C. C. Silverstein

1992-01-01

257

Adaptive Systems Engineering: A Medical Paradigm for Practicing Systems Engineering  

SciTech Connect

From its inception in the defense and aerospace industries, SE has applied holistic, interdisciplinary tools and work-process to improve the design and management of 'large, complex engineering projects.' The traditional scope of engineering in general embraces the design, development, production, and operation of physical systems, and SE, as originally conceived, falls within that scope. While this 'traditional' view has expanded over the years to embrace wider, more holistic applications, much of the literature and training currently available is still directed almost entirely at addressing the large, complex, NASA and defense-sized systems wherein the 'ideal' practice of SE provides the cradle-to-grave foundation for system development and deployment. Under such scenarios, systems engineers are viewed as an integral part of the system and project life-cycle from conception to decommissioning. In far less 'ideal' applications, SE principles are equally applicable to a growing number of complex systems and projects that need to be 'rescued' from overwhelming challenges that threaten imminent failure. The medical profession provides a unique analogy for this latter concept and offers a useful paradigm for tailoring our 'practice' of SE to address the unexpected dynamics of applying SE in the real world. In short, we can be much more effective as systems engineers as we change some of the paradigms under which we teach and 'practice' SE.

R. Douglas Hamelin; Ron D. Klingler; Christopher Dieckmann

2011-06-01

258

Effect of cooling the recirculated exhaust gases on diesel engine emissions  

Microsoft Academic Search

Although combustion is essential in most energy generation processes, it is one of the major causes of air pollution. Spiral fin exhaust pipes were designed to study the effect of cooling the recirculated exhaust gases (EGR) of Diesel engines on the chemical composition of the exhaust gases and the reduction in the percentages of pollutant emissions. The gases examined in

Nidal H. Abu-Hamdeh

2003-01-01

259

Discrete-frequency and broadband noise radiation from diesel engine cooling fans  

Microsoft Academic Search

This effort focuses on measuring and predicting the discrete-frequency and broadband noise radiated by diesel engine cooling fans. Unsteady forces developed by the interaction of the fan blade with inlet flow are the dominant source for both discrete-frequency and broadband noise of the subject propeller fan. In many cases, a primary source of discrepancy between fan noise prediction and measurement

Geon-Seok Kim

2007-01-01

260

Development and application of a gas cooled reactor co-generation plant engineering simulation  

SciTech Connect

The approach and objectives for an engineering simulation of a gas cooled reactor-cogeneration process steam plant are described. The code structure and typical transient results are presented to indicate the code capabilities and to demonstrate its uses on the project.

Meyer, R.A.; Hooke, W.B.; Knight, D.D.; Switick, D.M.

1984-08-01

261

ENHANCEMENT OF COOLANT SIDE HEAT TRANSFER IN WATER COOLED ENGINES BY USING FINNED CYLINDER HEADS  

Microsoft Academic Search

An experimental investigation has been carried out for almost the first time to examine the heat transfer by forced convection and subcooled boiling from a finned water-cooled engine cylinder head using steady state technique. Cast iron and cast steel specimens with and without fins have been used in the present work. The effects of flow velocity, coolant bulk temperature, fin

Mohamed Y. E. Selim; A. H. B. Helali

262

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

263

Numerical simulation and optimization on heat transfer and fluid flow in cooling channel of liquid rocket engine thrust chamber  

Microsoft Academic Search

Purpose To find the optimal number of channels of rocket engine thrust chamber, it was found that the optimal channel number is 335, at which the cooling effect of the thrust chamber cooling channel reaches the best, which can be helpful to design rocket engine thrust chamber. Design\\/methodology\\/approach The commercial computational fluid dynamics (CFD) software FLUENT with standard

Qiuwang Wang; Feng Wu; Min Zeng; Laiqin Luo; Jiguo Sun

2006-01-01

264

Air cooled turbine component having an internal filtration system  

SciTech Connect

A centrifugal particle separator is provided for removing particles such as microscopic dirt or dust particles from the compressed cooling air prior to reaching and cooling the turbine blades or turbine vanes of a turbine engine. The centrifugal particle separator structure has a substantially cylindrical body with an inlet arranged on a periphery of the substantially cylindrical body. Cooling air enters centrifugal particle separator through the separator inlet port having a linear velocity. When the cooling air impinges the substantially cylindrical body, the linear velocity is transformed into a rotational velocity, separating microscopic particles from the cooling air. Microscopic dust particles exit the centrifugal particle separator through a conical outlet and returned to a working medium.

Beeck, Alexander R. (Orlando, FL)

2012-05-15

265

Water cooled scavenged crankcase type otto internal combustion engine  

SciTech Connect

This patent describes an improved combustion chamber of an internal combustion engine comprising in combination: a cylinder defining the chamber, an intake passage communicating with the chamber, an exhaust passage communicating with the chamber, a piston slidable within the cylinder, the wall and head of the cylinder having removable ceramic liners facing toward the chamber, the totality of the head of the piston facing toward the chamber having a removable ceramic liner, the wall lining extending throughout the major portion of the cylinder length.

Bidwell, H.

1988-12-20

266

Comparative analysis of thermally activated, environmentally friendly cooling systems  

Microsoft Academic Search

This paper compares the relative performances of three different thermally activated, environmentally friendly cooling systems, e.g. a silica-gelwater adsorption system, a LiBrH2O absorption system and a desiccant air system. The adsorption and absorption systems in the current study employ water as the refrigerant, while the desiccant system cools atmospheric air directly. Each of these systems can be utilized at relatively

Y. Gupta; L. Metchop; A. Frantzis; P. E. Phelan

2008-01-01

267

The MANX Muon Cooling Experiment Detection System  

Microsoft Academic Search

The MANX experiment is being proposed to demonstrate the reduction of 6D muon phase space emittance, using a continuous liquid absorber to provide ionization cooling in a helical solenoid magnetic channel. The experiment involves the construction of a two-period-long helical cooling channel (HCC) to reduce the muon invariant emittance by a factor of two. The HCC would replace the current

S. A. Kahn; R. J. Abrams; C. Ankenbrandt; M. A. C. Cummings; R. P. Johnson; T. J. Robertsa; K. Yoneharab

2010-01-01

268

Simulations and economic analyses of desiccant cooling systems  

Microsoft Academic Search

The progress to date in the development and analysis of computer simulations of solar-powered desiccant cooling using an axial-flow disc-type dehumidifier wheel, solar-powered space heating, and electrically driven, standard vapor-compression air-conditioning systems for residential use is documented. Computer simulations for both solar and conventional heating and cooling systems were performed for 12-month heating and cooling seasons. Annual thermal performance and

B. C. Shelpuk; D. W. Hooker; G. J. Jorgensen; C. E. Bingham

1979-01-01

269

A SOLAR EJECTOR COOLING SYSTEM USING REFRIGERANT R141b  

Microsoft Academic Search

A high-performance solar ejector cooling system using R141b as the working fluid was developed. We obtain experimentally a COP of 0.5 for a single-stage ejector cooling system at a generating temperature of 90C, condensing temperature of 28C, and an evaporating temperature 8C. For solar cooling application, an optimum overall COP can be obtained around 0.22 at a generating temperature of

B. J Huang; J. M Chang; V. A Petrenko; K. B Zhuk

1998-01-01

270

Making a case for Systems Engineering  

Microsoft Academic Search

In late 2007, the Systems Engineering Advancement (SEA) Project at the Jet Propulsion Laboratory (JPL) decided to design a multi-day Systems Engineering Workshop to train systems engineers in the practice of systems engineering. They were determined to avoid the trap of merely giving hours of lectures and presentations that would bore the audience and soon be forgotten. They decided to

P. A. Jansma

2010-01-01

271

Making a case for systems engineering  

Microsoft Academic Search

In late 2007, the Systems Engineering Advancement (SEA) Project at the Jet Propulsion Laboratory (JPL) decided to design a multi-day Systems Engineering Workshop to train systems engineers in the practice of systems engineering. They were determined to avoid the trap of merely giving hours of lectures and presentations that would bore audiences and soon be forgotten. They decided to base

P. A. T. Jansma

2010-01-01

272

Nuclear engine system simulation (NESS) program update  

Microsoft Academic Search

The second phase of development of a Nuclear Thermal Propulsion (NTP) engine system design analysis code has been completed. The standalone, versatile Nuclear Engine System Simulation (NESS) code provides an accurate, detailed assessment of engine system operating performance, weight, and sizes. The critical information is required to support ongoing and future engine system and stage design study efforts. This recent

Christine M. Scheil; Dennis G. Pelaccio; Lyman J. Petrosky

1993-01-01

273

Earth Systems Science and Engineering  

Microsoft Academic Search

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

Rotman

2006-01-01

274

A Distributed Systems Engineering Curriculum for Working Engineers in California  

Microsoft Academic Search

As part of a workforce initiative grant, we are developing a catalog and curricular structure to enable working engineers in California to obtain Systems Engineering education from a variety of providers in a self-paced manner. The target audience for this effort is companies and indi- viduals who require better Systems Engineering capabilities, but lack the resources and infra- structure for

Kurt Colvin; Robert Crockett

275

Nuclear reactor cooling system decontamination reagent regeneration  

DOEpatents

An improved method for decontaminating the coolant system of water-cooled nuclear power reactors and for regenerating the decontamination solution. A small amount of one or more weak-acid organic complexing agents is added to the reactor coolant, and the pH is adjusted to form a decontamination solution which is circulated throughout the coolant system to dissolve metal oxides from the interior surfaces and complex the resulting metal ions and radionuclide ions. The coolant containing the complexed metal ions and radionuclide ions is passed through a strong-base anion exchange resin bed which has been presaturated with a solution containing the complexing agents in the same ratio and having the same pH as the decontamination solution. As the decontamination solution passes through the resin bed, metal-complexed anions are exchanged for the metal-ion-free anions on the bed, while metal-ion-free anions in the solution pass through the bed, thus removing the metal ions and regenerating the decontamination solution.

Anstine, Larry D. (San Jose, CA); James, Dean B. (Saratoga, CA); Melaika, Edward A. (Berkeley, CA); Peterson, Jr., John P. (Livermore, CA)

1985-01-01

276

The MANX Muon Cooling Experiment Detection System  

SciTech Connect

The MANX experiment is being proposed to demonstrate the reduction of 6D muon phase space emittance, using a continuous liquid absorber to provide ionization cooling in a helical solenoid magnetic channel. The experiment involves the construction of a two-period-long helical cooling channel (HCC) to reduce the muon invariant emittance by a factor of two. The HCC would replace the current cooling section of the MICE experiment now being set up at the Rutherford Appleton Laboratory. The MANX experiment would use the existing MICE spectrometers and muon beam line. We discuss the placement of detection planes to optimize the muon track resolution.

Kahn, S. A.; Abrams, R. J.; Ankenbrandt, C.; Cummings, M. A. C.; Johnson, R. P.; Robertsa, T. J. [Muons, Inc., Batavia, IL (United States); Yoneharab, K. [Fermilab, Batavia, IL (United States)

2010-03-30

277

Nuclear thermal propulsion engine system design analysis code development  

NASA Astrophysics Data System (ADS)

A Nuclear Thermal Propulsion (NTP) Engine System Design Analyis Code has recently been developed to characterize key NTP engine system design features. Such a versatile, standalone NTP system performance and engine design code is required to support ongoing and future engine system and vehicle design efforts associated with proposed Space Exploration Initiative (SEI) missions of interest. Key areas of interest in the engine system modeling effort were the reactor, shielding, and inclusion of an engine multi-redundant propellant pump feed system design option. A solid-core nuclear thermal reactor and internal shielding code model was developed to estimate the reactor's thermal-hydraulic and physical parameters based on a prescribed thermal output which was integrated into a state-of-the-art engine system design model. The reactor code module has the capability to model graphite, composite, or carbide fuels. Key output from the model consists of reactor parameters such as thermal power, pressure drop, thermal profile, and heat generation in cooled structures (reflector, shield, and core supports), as well as the engine system parameters such as weight, dimensions, pressures, temperatures, mass flows, and performance. The model's overall analysis methodology and its key assumptions and capabilities are summarized in this paper.

Pelaccio, Dennis G.; Scheil, Christine M.; Petrosky, Lyman J.; Ivanenok, Joseph F.

1992-01-01

278

Get the most out of your cooling system  

Technology Transfer Automated Retrieval System (TEKTRAN)

Warm weather poses management challenges to maintain production efficiency in broiler chickens. Proper maintenance and operation of ventilation and cooling system components is essential to maintain the proper thermal environment and efficient use of energy. Fan and evaporative cooling system clea...

279

Laboratory research on combined cooling, heating and power (CCHP) systems  

Microsoft Academic Search

Combined cooling, heating and power (CCHP) systems offer the potential for a significant increase in fuel use efficiency by generating electricity onsite and recycling the exhaust gas for heating, cooling, or dehumidifying. A challenge for CCHP system is the efficient integration of distributed generation (DG) equipment with thermally-activated (TA) technologies. The China Ministry of Science and Technology and Tsinghua University

L. Fu; X. L. Zhao; S. G. Zhang; Y. Jiang; H. Li; W. W. Yang

2009-01-01

280

Assessing Maintenance of Evaporative Cooling Systems in Legionellosis Outbreaks  

Microsoft Academic Search

This study was designed to conduct systematic reviews of existing evaporative cooling system maintenance guidelines and of published Legionnaires disease outbreaks to determine what, if any, maintenance practices were in place at the time of the disease outbreaks and then to contrast the reported practices with the published guidelines for evaporative cooling systems. For the first review, similarities in the

Kelly M. Rangel; George Delclos; Robert Emery; Elaine Symanski

2011-01-01

281

Weather-predicted control of building free cooling system  

Microsoft Academic Search

In this paper, the optimization of a weather-predicted free cooling system combined with heat storage is shown. The method of incorporating weather forecasts into the control system is presented. The regime of operation was selected and optimized based on free cooling energy and the required temperature parameters of a buildings indoor environment, using variable flow rate control through the heat

Klemen Dovrtel

2011-01-01

282

Advanced cooling system using miniature heat pipes in mobile PC  

Microsoft Academic Search

This paper describes various cooling solutions using heat pipes for cooling a notebook PC. These are: 1) heat pipe with heat spreader plate; 2) hybrid system-i.e., heat pipe with heat sink and fan; and 3) hinged heat pipe system. For heat input of less than 12 W, the thermal resistance measured between the surface of the CPU to ambient was

Thang Nguyen; Masataka Mochizuki; Koichi Mashiko; Yuji Saito; I. Sanciuc; Rex Boggs

2000-01-01

283

Systems engineering at the nanoscale  

NASA Astrophysics Data System (ADS)

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

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

2012-05-01

284

Core Concepts of Systems Engineering  

NSDL National Science Digital Library

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

285

Heat pump system with selective space cooling  

DOEpatents

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve.

Pendergrass, Joseph C. (Gainesville, GA)

1997-01-01

286

Heat pump system with selective space cooling  

DOEpatents

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve. 4 figs.

Pendergrass, J.C.

1997-05-13

287

Systems Engineering Cost Estimation for Space Systems  

Microsoft Academic Search

The applicability of COSYSMO, a systems engineering cost model, is explored in the context of space systems through the analysis of two main assumptions. First, the WBS elements of the model are mapped to a prototypical WBS for space systems. Second, the life cycle phases assumed in the model are mapped to the phases outlined in the latest National Security

Ricardo Valerdi; Marilee J. Wheaton; Jared Fortune

2007-01-01

288

A hemolysis study of an intravascular blood cooling system for localized organ tissue cooling.  

PubMed

Therapeutic hypothermia can reduce both ischemic and reperfusion injury arising after strokes and heart attacks. New localized organ cooling systems offer a way to reduce tissue damage more effectively with fewer side effects. To assess initial blood safety of our new organ cooling system, the CoolGuide Cooling System (CCS), we investigated safe operating conditions and configurations from a hemolysis perspective. The CCS consists of a peristaltic pump, a custom-built external heat exchanger, a chiller, biocompatible polyvinyl cellulose (PVC) tubing, and a control console. The CCS cools and circulates autologous blood externally and re-delivers cooled blood to the patient through a conventional catheter inserted directly into the organ at risk. Catheter configurations used included: a 7F guide catheter only, a 7F guide with a 0.038" wire inserted through the center and advanced 2 cm distal to the catheter distal tip, a 6F guide catheter only and a 6F guide with a 0.014" guidewire similarly inserted through the center. Using porcine blood, an in vitro test rig was used to measure the degree of hemolysis generation, defined as the percentage change in free hemoglobin, adjusted for total hemoglobin and hematocrit, between exiting and entering blood. The highest degree of hemolysis generation was 0.110.04%, based on the average behavior with a 6F catheter and a 0.014" guidewire configuration at a blood flow rate of approximately 130 mL/min. In terms of average percentage free hemoglobin exiting the system, based on total hemoglobin, the highest value measured was 0.17%0.03%, using this 6F and 0.014" guidewire configuration. This result is significantly below the most stringent European guideline of 0.8% used for blood storage and transfusion. This study provides initial evidence showing hemolysis generation arising from the CoolGuide Cooling System is likely to be clinically insignificant. PMID:23047283

Merrill, T L; Mingin, T; Merrill, D R; Botbyl, J; Akers, J E

2012-10-09

289

Annular combustor for a turbine engine without film cooling  

SciTech Connect

This patent describes a gas turbine engine. It comprises a rotary compressor; a turbine wheel coupled to the compressor to drive the same; an annular nozzle in proximity to the turbine wheel and having a plurality of vanes disposed to direct gases of combustion at the turbine wheel, the vanes having leading edges remote from the turbine wheel and trailing edges adjacent the turbine wheel; an annular combustor having a radially outer wall, a radially inner wall spaced therefrom and a radially extending wall interconnecting the inner and outer walls remote from the nozzle, the inner and outer walls, at a location remote from the radially extending wall defining an outlet throat opening to the leading edges of the vanes; means for injecting fuel into the combustor; a plurality of axially spaced rows of tangentially directed passages formed in the outer wall and in fluid communication with the compressor for introducing combustion air into the combustor, the passages being sized to provide substantially only combustion air to the substantial exclusion of dilution air into the combustor and in a quantity to substantially stoichiometrically combust fuel injected into the combustor by the fuel injecting means, and the combustor, between the throat and the radially extending wall, otherwise being free of any inlets in fluid communication with the compressor; and means at the throat and just upstream of the leading edges and in fluid communication with the compressor for introducing substantially all dilution air thereat toward the nozzle and away from the combustor whereby the combustion flame zone of the combustor is maximized.

Shekleton, J.R.; Lafferty, M.K.

1992-04-07

290

Gas turbine engine compartment vent system  

SciTech Connect

This paper describes improvement in a gas turbine engine of the type having a core engine, a shroud surrounding the core engine, a tubular outer nacelle defining an annular bypass duct therebetween and a fan disposed in the nacelle inlet for directing compressed air flow into and through the bypass duct, the shroud spaced from the engine sufficiently to provide space for installation of heat sensitive engine related components. The improvement comprises: at least one vent through the shroud, selectively positioned to direct compressed fan air from the bypass duct into the space between the shroud and engine for direct impingement on at least one of the heat sensitive engine related components for cooling same; the vent comprising an open ended tube extending through a hole in the shroud, bonded thereto, and terminating therein adjacent to the heat sensitive engine related components.

Mutch, H.

1991-10-08

291

Design Studies of Magnet Systems for Muon Helical Cooling Channels  

SciTech Connect

Helical cooling channels with superimposed solenoid and helical dipole and quadrupole coils, and a pressurized gas absorber in the aperture offer high efficiency of 6D muon beam cooling. In this paper, we continue design studies and comparison of two basic concepts of magnet system proposed for a helical cooling channel focusing on the high field sections. The results of magnetic analysis and Lorentz force calculations as well as the superconductor choice are presented and discussed.

Kashikhin, V.; Kashikhin, V.S.; Lamm, M.J.; Lopes, M.L.; Zlobin, A.V.; /Fermilab; Alsharo'a, M.; Johnson, R.P.; Kahn, Stephen A.; /MUONS Inc., Batavia

2008-06-25

292

Numerical modeling of boundary-layer cooling of rocket engine combustion chambers  

NASA Astrophysics Data System (ADS)

This study investigates boundary-layer cooling of rocket engine combustion chambers by means of numerical modeling. Using computational fluid dynamic methods to model the reacting viscous flow field in rocket combustion chambers, various propellant combinations and chamber geometries are analyzed. Specific propellants are hydrogen-oxygen and methane-oxygen mixtures. Chamber geometries used are the Space Shuttle Main Engine, 5.7 diameter research chamber, and the Apollo/Saturn F-1. Several modifications to existing codes are required to accommodate proposed boundary-layer cooling using fuel as the boundary fluid. This work discusses the mathematical basis for the numerical scheme used and the chemistry models needed to solve the reacting flow field, including specifically the field's boundary layer. Variables considered in the flow field are temperature, pressure, Mach number, species concentration, velocity, density, acoustic velocity, and heat transfer. Using results obtained in the study, a high pressure (Pc > 3000 psi) methane fueled rocket engine is proposed. Included is an analytical estimate of how thrust can be increased, with no loss of performance due to the active fuelfed boundary layer. The author concludes that numerical methods can effectively model the flow processes in boundary-layer cooled combustion chambers, giving designers the requisite information for analyzing rocket engines.

Pitalo, Gerald Alexander

2000-10-01

293

Security systems engineering overview  

SciTech Connect

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

Steele, B.J.

1996-12-31

294

Development of design charts for solar cooling systems. Part I: computer simulation for a solar cooling system and development of solar cooling design charts  

Microsoft Academic Search

An integrated transient simulation program is developed for simulating the Iraqi solar house cooling system, using TRNSYS as a design tool. The simulation is modeled for other virtual solar cooling systems similar to the Iraqi solar house. A number of computer programs were developed and used in parallel with TRNSYS for developing an integrated program for the complete simulation of

Khalid A. Joudi; Qussai J. Abdul-Ghafour

2003-01-01

295

Complex Adaptive Systems Engineering (CASE)  

Microsoft Academic Search

We suggest a portfolio of distinct but related systems engineering activities that collectively may work well in very difficult environments. The CASE methodology acknowledges the human factor and encourages exerting influence rather than control. We advocate their consideration and application in limited domains, at first, to gain confidence in their viability.

B. E. White

2009-01-01

296

System engineering aspects on IBC  

Microsoft Academic Search

Service and system engineering aspects developed within the RACE (Research and Development in Advanced Communications in Europe) program by project R 1044, entitled IBC (integrated broadband communications) Development and Implementation Strategies are described. It is shown how broadband interactive services will support business applications and how residential customers can be offered TV-based services. The features and technical characteristics of the

F. Casali; J. Vandenameele

1991-01-01

297

Electromagnetic Pumps for Main Cooling Systems of Commercialized Sodium-Cooled Fast Reactor  

Microsoft Academic Search

An electromagnetic pump (EMP) has superior potential to improve the economic performance and ease of maintenance of sodium-cooled fast reactors. This study investigates the adequateness of a modular-type EMP system for large-sized (1,500MWe class) sodium-cooled fast reactors. A flow rate of over 500 m\\/min is required for the main circulating pump of such reactors. There is concern that such a

Kosuke AIZAWA; Yoshitaka CHIKAZAWA; Shoji KOTAKE; Kuniaki ARA; Rie AIZAWA; Hiroyuki OTA

2011-01-01

298

Performance Evaluation for Modular, Scalable Overhead Cooling Systems In Data Centers  

SciTech Connect

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. Naturally, the trend toward higher power density resulting from current and future generations of servers has, in the meanwhile, created significant opportunities for precision cooling suppliers to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants' input, including specific design and operating characteristics of the selected modular localized cooling solution provided by vendor 1. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a modular, scalable overhead cooling system. The system was tested in a hot/cold aisle environment without separation, or containment or the hot or cold aisles. The scope of this report is to quantify energy performance of the modular cooling unit in operation as it corresponds to a combination of varied server loads and inlet air temperatures. The information generated from this testing when combined with a concurrent research study to document the energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Xu, TengFang T.

2009-05-01

299

Research on hypersonic aircraft using pre-cooled turbojet engines  

Microsoft Academic Search

Systems analysis of a Mach 5 class hypersonic aircraft is performed. The aircraft can fly across the Pacific Ocean in two hours. A multidisciplinary optimization program for aerodynamics, structure, propulsion, and trajectory is used in the analysis. The result of each element model is improved using higher accuracy analysis tools. The aerodynamic performance of the hypersonic aircraft is examined through

Hideyuki Taguchi; Hiroaki Kobayashi; Takayuki Kojima; Atsushi Ueno; Shunsuke Imamura; Motoyuki Hongoh

300

Suggested Criteria for Evaluating Systems Engineering Methodologies.  

National Technical Information Service (NTIS)

Systems engineering is the application of mathematical and scientific principles to practical ends in the life-cycle of a system. A methodology for systems engineering is a carefully developed, relatively complex procedure or process for applying these ma...

A. Gates A. S. Paul T. L. Gill

1989-01-01

301

Performance Evaluation for a Modular, Scalable Passive Cooling System in Data Centers  

SciTech Connect

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. In the meanwhile, the trend toward higher power density resulting from current and future generations of servers has created significant opportunities for precision cooling to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants input, including specific design and operating characteristics of the selected passive, modular localized cooling solution provided by vendor 4. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a passive, modular, scalable liquid cooling system in this study. The scope is to quantify energy performance of the modular cooling unit corresponding to various server loads and inlet air temperatures, under various chilled-water supply temperatures. The information generated from this testing when combined with documented energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Xu, TengFang

2009-05-01

302

Performance Evaluation for Modular, Scalable Liquid-Rack Cooling Systems in Data Centers  

SciTech Connect

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. In the meanwhile, the trend toward higher power density resulting from current and future generations of servers has created significant opportunities for precision cooling suppliers to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants input, including specific design and operating characteristics of the selected modular localized cooling solution provided by vendor 3. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a modular, scalable liquid-rack cooling system in this study. The scope is to quantify energy performance of the modular cooling unit in operation as it corresponds to a combination of varied server loads and inlet air temperatures, under various chilled-water supply temperatures. The information generated from this testing when combined with documented energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Xu, TengFang

2009-05-01

303

Knowledge-Based Systems Engineering Risk Assessment  

Microsoft Academic Search

A knowledge-based method for systems engineering risk assessment has been automated in an expert system tool. Expert COSYSMO performs systems engineering risk assessment in conjunction with cost estimation using the Constructive Systems Engineering Cost Model (COSYSMO). The technique is an extension of COSYSMO which supports project planning by identifying, categorizing, quantifying, and prioritizing system-level risks. Workshops and surveys with seasoned

Raymond Madachy; Ricardo Valerdi

2008-01-01

304

Improvement of Cooling Performance of a Compact Thermoelectric Air Conditioner Using a Direct Evaporative Cooling System  

NASA Astrophysics Data System (ADS)

This paper presents the results of tests carried out to investigate the potential application of a direct evaporative cooling (DEC) system for improving the performance of a compact thermoelectric (TE) air conditioner. The compact TE air conditioner is composed of three TE modules. The cold and hot sides of the TE modules were fixed to rectangular fin heat sinks. The DEC system produced cooling air that was used to assist the release of heat from the heat sinks at the hot side of the TE modules. The results showed that the cooling air dry bulb temperature from the DEC system achieved drops of about 5.9C in parallel with about a 33.4% rise in relative humidity. The cooling efficiency of the DEC system varies between 72.1% and 81.5%. It increases the cooling capacity of the compact TE air conditioner from 53.0 W to 74.5 W. The 21.5 W (40.6%) increase represents the difference between the compact air conditioner operating with ambient air flowing through the TE module's heat sinks, and the compact air conditioner operating with the cooler air from the DEC system flowing through the TE module's heat sinks. In both scenarios, electric current of 4.5 A was supplied to the TE modules. It also has been experimentally proven that the coefficient of performance (COP) of the compact TE air conditioner can be improved by up to 20.9% by incorporating the DEC system.

Tipsaenporm, W.; Lertsatitthanakorn, C.; Bubphachot, B.; Rungsiyopas, M.; Soponronnarit, S.

2012-06-01

305

Closed loop air cooling system for combustion turbines  

DOEpatents

Convective cooling of turbine hot parts using a closed loop system is disclosed. Preferably, the present invention is applied to cooling the hot parts of combustion turbine power plants, and the cooling provided permits an increase in the inlet temperature and the concomitant benefits of increased efficiency and output. In preferred embodiments, methods and apparatus are disclosed wherein air is removed from the combustion turbine compressor and delivered to passages internal to one or more of a combustor and turbine hot parts. The air cools the combustor and turbine hot parts via convection and heat is transferred through the surfaces of the combustor and turbine hot parts. 1 fig.

Huber, D.J.; Briesch, M.S.

1998-07-21

306

Closed loop air cooling system for combustion turbines  

DOEpatents

Convective cooling of turbine hot parts using a closed loop system is disclosed. Preferably, the present invention is applied to cooling the hot parts of combustion turbine power plants, and the cooling provided permits an increase in the inlet temperature and the concomitant benefits of increased efficiency and output. In preferred embodiments, methods and apparatus are disclosed wherein air is removed from the combustion turbine compressor and delivered to passages internal to one or more of a combustor and turbine hot parts. The air cools the combustor and turbine hot parts via convection and heat is transferred through the surfaces of the combustor and turbine hot parts.

Huber, David John (North Canton, OH); Briesch, Michael Scot (Orlando, FL)

1998-01-01

307

Management System for Engineering Ethics  

NASA Astrophysics Data System (ADS)

In the context of independent profession based societies, ethics charter/codes of professional bodies have significant influence on the conduct of engineers. Contrarily in Japan, most of active engineers are in-house and feel immediate identity as the member of firm or institution, rather than professional bodies. Therefore, establishment and operation of engineering ethics management system (E2ms) is essential for incentive to make innovative and ethical decision with confidence. The paper introduces the outline of the educational kit for E2ms developed by the author. The kit aims to enhance ability of management relevant to E2ms. The kit also involves ten cases for case method teaching. The test use of the kit indicates the potential to create satisfactory educational achievement.

Yashiro, Tomonari

308

Compact Solid State Cooling Systems: Compact MEMS Electrocaloric Module  

SciTech Connect

BEETIT Project: UCLA is developing a novel solid-state cooling technology to translate a recent scientific discovery of the so-called giant electrocaloric effect into commercially viable compact cooling systems. Traditional air conditioners use noisy, vapor compression systems that include a polluting liquid refrigerant to circulate within the air conditioner, absorb heat, and pump the heat out into the environment. Electrocaloric materials achieve the same result by heating up when placed within an electric field and cooling down when removedeffectively pumping heat out from a cooler to warmer environment. This electrocaloric-based solid state cooling system is quiet and does not use liquid refrigerants. The innovation includes developing nano-structured materials and reliable interfaces for heat exchange. With these innovations and advances in micro/nano-scale manufacturing technologies pioneered by semiconductor companies, UCLA is aiming to extend the performance/reliability of the cooling module.

None

2010-10-01

309

Performance Evaluation for Modular, Scalable Cooling Systems with Hot Aisle Containment in Data Centers  

SciTech Connect

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. Naturally, the trend toward higher power density resulting from current and future generations of servers has, in the meanwhile, created significant opportunities for precision cooling suppliers to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants input, including specific design and operating characteristics of the selected modular localized cooling solution provided by vendor 2. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a modular, scalable pair of chilled water cooling modules that were tested in a hot/cold aisle environment with hot aisle containment. The scope of this report is to quantify energy performance of the modular cooling unit in operation as it corresponds to a combination of varied server loads and inlet air temperatures. The information generated from this testing when combined with a concurrent research study to document the energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Adams, Barbara J

2009-05-01

310

Developing rapid heating and cooling systems using pyrolytic graphite  

Microsoft Academic Search

Rapid heating and cooling is desired in many applications. A new type of rapid heating and cooling system using pyrolytic graphite (PG) was investigated. Due to a large degree of anisotropy, a factor of 200 in thermal conductivity difference and a factor of 1200 in electrical resistivity difference, PG is suitable for rapid surface heating. The high electrical resistivity and

Donggang Yao; Byung Kim

2003-01-01

311

Performance tests of high temperature superconducting power cable cooling system  

Microsoft Academic Search

A high temperature superconducting power cable requires forced flow cooling. Liquid nitrogen is circulated by a pump and cooled down by a subcooling system. Typical operating temperature range is expected to be between 65 K and 80 K. The circulating liquid nitrogen is subcooled by liquid nitrogen boiling on the shell side of a subcooler heat exchanger, and then it

Deukyong Koh; Hankil Yeom; Yongju Hong; Kwansoo Lee

2004-01-01

312

OPERATIONAL AND ENVIRONMENTAL IMPACTS OF CLOSED CYCLE COOLING SYSTEMS  

EPA Science Inventory

The paper gives results of a study of operational and environmental impacts of closed cooling systems, used for about a quarter of the nation's steam-electric generating capacity. Conclusions relating to operational impacts include: (1) closed cycle cooling leads to increased pow...

313

Development of an ejector cooling system with thermal pumping effect  

Microsoft Academic Search

This paper presents a feasibility study of an ejector cooling system (ECS) that utilizes a multi-function generator (MFG) to eliminate the mechanical pump. The MFG serves as both a pump and a vapor generator. The MFG is designed based on the pressure equilibration between high and low pressures through heating and cooling process. In this design, an ECS that contains

B. J. Huang; S. S. Hu; S. H. Lee

2006-01-01

314

Modeling and simulation of improved solar absorption cooling systems  

Microsoft Academic Search

Solar absorption cooling is economically unattractive compared to vapor compression cooling. This is due to the high cost and relatively low efficiency of the equipment. Improved configurations of the different components of the solar absorption system were studied, and techniques for their evaluation developed. The method consists of mathematic modeling and computer simulations. Three advanced absorption cycles, the absorption-resorption, double

Campos-Velarde

1983-01-01

315

Cryogenic cooling system for the ground test accelerator  

SciTech Connect

A cryogenic cooling system has been designed, built and tested for the Ground Test Accelerator (GTA) at the Los Alamos National Laboratory. Major components of the GTA require cooling to less than 50 K to reduce rf-heating and to increase thermal stability. The cooling system is capable of cooling (at an acceptable rate for thermal stresses) the cryogenically cooled components and then maintaining them at their operating temperature during accelerator testing for all modes and power levels of operation. The accelerator components are cooled by circulating cold, dense helium gas (about 21 K and 2.1 MPa) through the components. The circulating helium is refrigerated in a heat exchanger that uses boiling liquid hydrogen as a source of refrigeration. The cryogenic cooling system consists of the following major components: a liquid hydrogen (LH{sub 2}) storage Dewar with a transfer line to an LH{sub 2} run tank containing an LH{sub 2}/gaseous helium (GHe) heat exchanger, circulation lines, and a circulation pump. The system, sized to cool a load of approximately 40 kW at temperatures as low as 20 K, is operational, but has not yet been operated in conjunction with the accelerator.

Edeskuty, F.J.; Stewart, W.F.; Moeller, J.; Durham, F. [Los Alamos National Lab., NM (United States); Spulgis, I. [CVI, Inc., Columbus, OH (United States)

1993-06-01

316

Cryogenic cooling system for the ground test accelerator  

SciTech Connect

A cryogenic cooling system has been designed, built and tested for the Ground Test Accelerator (GTA) at the Los Alamos National Laboratory. Major components of the GTA require cooling to less than 50 K to reduce rf-heating and to increase thermal stability. The cooling system is capable of cooling (at an acceptable rate for thermal stresses) the cryogenically cooled components and then maintaining them at their operating temperature during accelerator testing for all modes and power levels of operation. The accelerator components are cooled by circulating cold, dense helium gas (about 21 K and 2.1 MPa) through the components. The circulating helium is refrigerated in a heat exchanger that uses boiling liquid hydrogen as a source of refrigeration. The cryogenic cooling system consists of the following major components: a liquid hydrogen (LH[sub 2]) storage Dewar with a transfer line to an LH[sub 2] run tank containing an LH[sub 2]/gaseous helium (GHe) heat exchanger, circulation lines, and a circulation pump. The system, sized to cool a load of approximately 40 kW at temperatures as low as 20 K, is operational, but has not yet been operated in conjunction with the accelerator.

Edeskuty, F.J.; Stewart, W.F.; Moeller, J.; Durham, F. (Los Alamos National Lab., NM (United States)); Spulgis, I. (CVI, Inc., Columbus, OH (United States))

1993-01-01

317

Impact of advanced fluids on costs of district cooling systems  

Microsoft Academic Search

Three alternate fluids, ice-water slurry, friction reduction additive and the combination of them, have been compared for use in District Cooling Systems (DCS). The effect of the fluids on cost and cooling capacities were considered for the two cases of new and existing DCS separately. Two criteria were used in comparisons among fluids in each case: constant pumping power which

D. M. France; B. D. Knodel

1992-01-01

318

Cool Stars, Stellar Systems and the Sun.  

NASA Astrophysics Data System (ADS)

The series of 'Cool Star' meetings concentrates on the astrophysics of low-mass stars (with masses similar to that of the Sun and lower), including the Sun. The meeting in St. Andrews, Scotland, was the 15th in this series, and focused in particular on the origin of low-mass stars and their planets, as well as the properties of their atmospheres. This volume provides a comprehensive overview of the science presented by the 350 participants of this meeting. The book is suitable for researchers and graduate students interested in the astrophysics of cool stars and the Sun.

Stempels, Eric

2009-02-01

319

Joint Tactical Radio System - Enterprise System Engineering  

Microsoft Academic Search

The Joint Tactical Radio System (JTRS) is a core transformational program within the Department of Defense (DoD), critical to extending the Global Information Grid (GIG) to the tactical edge. The Joint Program Executive Office (JPEO) was established in 2005 to manage the development of JTRS. One of the JPEO's assigned responsibilities was to expand the approach to systems engineering across

Richard North; Calvin Vu; Tom Woodland

2007-01-01

320

Thermodynamic modelling of single\\/dual organic fluid Rankine cycle cooling systems: A comparative study  

Microsoft Academic Search

This paper presents thermodynamic modelling and a comparative study of single\\/dual fluid Rankine cycle cooling systems with regenerative heat exchangers in the Rankine Engine (RE)-cycle and the vapour Compression (VC)-cycle subsystems. Both single and dual fluid combinations for the RE-cycle and VC-cycle have been considered and their influence on the RE-cycle efficiency, COP of the VC-cycle and overall system performance

S. C. Kaushik; M. Singh; A. Dubey

1994-01-01

321

SOLERAS - Solar Cooling Engineering Field Tests Project: United Technologies Research Center. Final report, Volume 3. Engineering field test  

SciTech Connect

A solar-powered air conditioning system was designed, constructed, and installed at a Phoenix, Arizona site whose climatic conditions approximate those of Saudi Arabia. The nominal 18 ton capacity Rankine cycle chiller system with hot and cold storage and conventional fan/coil delivery units was operated for two cooling seasons and met its design objectives.

Not Available

1982-01-01

322

Engineering Design Information System (EDIS)  

SciTech Connect

This manual is a guide to the use of the Engineering Design Information System (EDIS) Phase I. The system runs on the Martin Marietta Energy Systems, Inc., IBM 3081 unclassified computer. This is the first phase in the implementation of EDIS, which is an index, storage, and retrieval system for engineering documents produced at various plants and laboratories operated by Energy Systems for the Department of Energy. This manual presents on overview of EDIS, describing the system's purpose; the functions it performs; hardware, software, and security requirements; and help and error functions. This manual describes how to access EDIS and how to operate system functions using Database 2 (DB2), Time Sharing Option (TSO), Interactive System Productivity Facility (ISPF), and Soft Master viewing features employed by this system. Appendix A contains a description of the Soft Master viewing capabilities provided through the EDIS View function. Appendix B provides examples of the system error screens and help screens for valid codes used for screen entry. Appendix C contains a dictionary of data elements and descriptions.

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

1990-11-01

323

Indirect air cooling techniques for control rod drives in the high temperature engineering test reactor  

Microsoft Academic Search

The high temperature engineering test reactor (HTTR) is the first high-temperature gas-cooled reactor in Japan with reactor outlet gas temperature of 950C and thermal power of 30MW. Sixteen pairs of control rods are employed for controlling the reactivity change of the HTTR. Each standpipe for a pair of the control rods, which is placed on the top head dome of

Takeshi Takeda; Yukio Tachibana

2003-01-01

324

Impact of advanced fluids on costs of district cooling systems  

SciTech Connect

Three alternate fluids, ice-water slurry, friction reduction additive and the combination of them, have been compared for use in District Cooling Systems (DCS). The effect of the fluids on cost and cooling capacities were considered for the two cases of new and existing DCS separately. Two criteria were used in comparisons among fluids in each case: constant pumping power which allows for the most benefit, and constant velocity which is more practical consideration. An economic assessment for a 500 ton system shows a potential cost difference in the total pipe cost for a new system of 70% when a 30% ice slurry is used in place of chilled water. The pipe diameter is reduced to 40% using the slurry. These results apply to the constant comparison and are independent of the use of additive. Friction reduction additives serve to reduce pumping power and pressure drop. The ice-water slurry also has a significant impact on existing district cooling systems. It can potentially expand the cooling capacity by 500% without new piping being installed while maintaining the same pumping power, velocity and pressure-drop as the chilled water system. Again, friction reduction additives serve to reduce pumping power and pressure-drop. They do not influence cooling capacity. The cost for expanding the piping to increase the cooling capacity by the same amount by the use of conventional district cooling technology has been shown to be extremely high compared to the ice-water slurry system.

Choi, U.S. (Argonne National Lab., IL (United States)); France, D.M.; Knodel, B.D. (Argonne National Lab., IL (United States) Illinois Univ., Chicago, IL (United States). Dept. of Mechanical Engineering)

1992-01-01

325

Impact of advanced fluids on costs of district cooling systems  

SciTech Connect

Three alternate fluids, ice-water slurry, friction reduction additive and the combination of them, have been compared for use in District Cooling Systems (DCS). The effect of the fluids on cost and cooling capacities were considered for the two cases of new and existing DCS separately. Two criteria were used in comparisons among fluids in each case: constant pumping power which allows for the most benefit, and constant velocity which is more practical consideration. An economic assessment for a 500 ton system shows a potential cost difference in the total pipe cost for a new system of 70% when a 30% ice slurry is used in place of chilled water. The pipe diameter is reduced to 40% using the slurry. These results apply to the constant comparison and are independent of the use of additive. Friction reduction additives serve to reduce pumping power and pressure drop. The ice-water slurry also has a significant impact on existing district cooling systems. It can potentially expand the cooling capacity by 500% without new piping being installed while maintaining the same pumping power, velocity and pressure-drop as the chilled water system. Again, friction reduction additives serve to reduce pumping power and pressure-drop. They do not influence cooling capacity. The cost for expanding the piping to increase the cooling capacity by the same amount by the use of conventional district cooling technology has been shown to be extremely high compared to the ice-water slurry system.

Choi, U.S. [Argonne National Lab., IL (United States); France, D.M.; Knodel, B.D. [Argonne National Lab., IL (United States)]|[Illinois Univ., Chicago, IL (United States). Dept. of Mechanical Engineering

1992-07-01

326

HEATING AND COOLING SYSTEM FOR CALUTRON  

DOEpatents

An apparatus is invented for heating or cooling the electrostatic liner conventionally disposed in a calutron tank. The apparatus is additionally arranged to mount the liner in its intended position in a readily detachable manner so as to facilitate disassembly of the calutron.

Starr, A.M.

1960-06-28

327

HEATING AND COOLING SYSTEM FOR CALUTRON  

Microsoft Academic Search

An apparatus is invented for heating or cooling the electrostatic liner ; conventionally disposed in a calutron tank. The apparatus is additionally ; arranged to mount the liner in its intended position in a readily detachable ; manner so as to facilitate disassembly of the calutron.

Starr

1960-01-01

328

Modelling an actively-cooled CPV system  

NASA Astrophysics Data System (ADS)

We have constructed a 7-node, 1-dimensional model of the heat flow in a water-cooled CPV receiver. The model is validated against data from a module exposed to solar irradiance at various concentrations up to 1,000X at the PETAL solar dish facility at Sede Boqer.

Buonomano, A.; Mittelman, G.; Faiman, D.; Biryukov, S.; Melnichak, V.; Bukobza, D.; Kabalo, S.

2012-10-01

329

Compact liquid cooling system for small, moveable electronic equipment  

Microsoft Academic Search

A compact liquid cooling system has been evaluated in a benchmark of self-contained heat exchanger units that fit within small movable electronic equipment, such as PCs and workstations. The compact cooling system connects to a multichip module package via a pair of flexible stainless steel hoses. The system contains a fluid expansion chamber, a liquid-to-air heat exchanger core, a fan,

T. Y. Tom Lee; James Andrews; P. Chow; D. Saums

1992-01-01

330

A Generic, Adaptive Systems Engineering Information Model  

Microsoft Academic Search

Systems engineering tasks generate large volumes of data and information that must be available over the lifecycle of the system. This paper outlines an information model designed to support existing systems engineering methods and practices as well newly developed techniques. Specific methods and models used for the capture, encoding and persistence of systems engineering information and design artifacts were given

Joseph J. Simpson; Scott Grasman; Ann Miller; Cihan Dagli

2005-01-01

331

Systems engineering: A problem of perception  

SciTech Connect

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

Senglaub, M.

1995-08-01

332

Modeling and performance of the MHTGR (Modular High-Temperature Gas-Cooled Reactor) reactor cavity cooling system  

Microsoft Academic Search

The Reactor Cavity Cooling System (RCCS) of the Modular High- Temperature Gas-Cooled Reactor (MHTGR) proposed by the U.S. Department of Energy is designed to remove the nuclear afterheat passively in the event that neither the heat transport system nor the shutdown cooling circulator subsystem is available. A computer dynamic simulation for the physical and mathematical modeling of and RCCS is

Conklin

1990-01-01

333

Environmental Restoration Project - Systems Engineering Management Plan.  

National Technical Information Service (NTIS)

This Environmental Restoration (ER) Project Systems Engineering Management Plan (SEMP) describes relevant Environmental Restoration Contractor (ERC) management processes and shows how they implement systems engineering. The objective of this SEMP is to ex...

T. D. Anderson

1998-01-01

334

76 FR 6551 - Medical Devices; General and Plastic Surgery Devices; Classification of Contact Cooling System...  

Federal Register 2010, 2011, 2012, 2013

...Plastic Surgery Devices; Classification of Contact Cooling System for Aesthetic Use AGENCY...Administration (FDA) is classifying the contact cooling system for aesthetic use into...II Special Controls Guidance Document: Contact Cooling System for Aesthetic...

2011-02-07

335

Cooling and shielding systems for infrared detectors - requirements and limits.  

PubMed

This paper presents three main cooling systems used for infrared detectors. At first thermoelectric devices are discussed. They allow cooling down the detector with low efficiency and not to the very low temperature. They do not generate any vibrations and therefore are suitable for thermal detectors, where the microphone effect can decrease their performance. Photon detectors need to be cooled down even to 77K or better. The only way to have such deep cooling is to use the cooler based on thermodynamic cycle such as Stirling one. With the high efficiency one can easily obtain cryogenic temperature for a detector. The electromagnetic noise and vibration generation are the main disadvantages of using such devices. Joule-Thomson effect during gas expansion is 3rdcooling system discussed in the paper. It is highly effective process, used for gas liquefaction too. The working gas is being removed during cooling into the atmosphere, so the need of continuous supplying with compressed one, what makes this system very difficult for remote applications. In the paper, simple calculations are presented to illustrate the advantages and disadvantages of the different cooling systems. PMID:17282258

Wiecek, B

2005-01-01

336

A model for radionuclide transport in the Cooling Water System  

SciTech Connect

A radionuclide transport model developed to assess radiological levels in the K-reactor Cooling Water System (CWS) in the event of an inadvertent process water (PW) leakage to the cooling water (CW) in the heat exchangers (HX) is described. During and following a process water leak, the radionuclide transport model determines the time-dependent release rates of radionuclide from the cooling water system to the environment via evaporation to the atmosphere and blow-down to the Savannah River. The developed model allows for delay times associated with the transport of the cooling water radioactivity through cooling water system components. Additionally, this model simulates the time-dependent behavior of radionuclides levels in various CWS components. The developed model is incorporated into the K-reactor Cooling Tower Activity (KCTA) code. KCTA allows the accident (heat exchanger leak rate) and the cooling tower blow-down and evaporation rates to be described as time-dependent functions. Thus, the postulated leak and the consequence of the assumed leak can be modelled realistically. This model is the first of three models to be ultimately assembled to form a comprehensive Liquid Pathway Activity System (LPAS). LPAS will offer integrated formation, transport, deposition, and release estimates for radionuclides formed in a SRS facility. Process water and river water modules are forthcoming as input and downstream components, respectively, for KCTA.

Kahook, S.D.

1992-08-01

337

CONTAINMENT SYSTEM, SPRAY CHAMBER, LOOKING NORTH WITH MIST COOLING MOLTEN ...  

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

CONTAINMENT SYSTEM, SPRAY CHAMBER, LOOKING NORTH WITH MIST COOLING MOLTEN STEEL SLABS AS THEY PROGRESS THROUGH THIS CHAMBER. - U.S. Steel, Fairfield Works, Continuous Caster, Fairfield, Jefferson County, AL

338

2. VIEW SOUTH OF WIND TUNNEL 138 AND COOLING SYSTEM ...  

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

2. VIEW SOUTH OF WIND TUNNEL 138 AND COOLING SYSTEM 140, NORTH ELEVATION - Naval Surface Warfare Center, Subsonic Wind Tunnel Building, Bounded by Clara Barton Parkway & McArthur Boulevard, Silver Spring, Montgomery County, MD

339

Natural circulating passive cooling system for nuclear reactor containment structure  

Microsoft Academic Search

This paper discusses a passive cooling, natural circulation system. It is for the containment structure of a nuclear reactor plant which is isolated from containment material within the reactor containment and provides overpressure protection within the containment housing.

P. F. Gou; G. E. Wade

1990-01-01

340

Cooling Systems Studies for Neodymium Doped Glass and YAG Lasers.  

National Technical Information Service (NTIS)

An analytical evaluation of a variety of techniques was performed for cooling laser cavities and for rejecting heat from laser systems. Advantages, disadvantages, and unique areas of applicability for each technique were summarized to provide criteria for...

R. S. Woodard P. J. Kendall K. W. Fagin

1970-01-01

341

Professional Issues in System Safety Engineering  

NASA Astrophysics Data System (ADS)

For many years the profession of system safety engineering has been emerging. This paper argues that the time has now come when it requires recognition, a voice, proper governance and leadership. System safety engineering is an amalgam of many disciplines, in particular, software engineering, safety engineering and management, and systems engineering, and this paper shows that system safety engineering must address the most difficult aspects of all of these. But professional matters extend beyond merely technical considerations, and the paper concludes by showing why there is the need for a new professional body.

McDermid, John; Thomas, Martyn; Redmill, Felix

342

Ignition system for internal combustion engine  

Microsoft Academic Search

An ignition control system is described for an internal combustion engine, comprising: means for detecting engine operating conditions to produce operating condition signals indicative at predetermined intervals of engine crank angle; means for computing engine ignition timing in response to the operating condition signals to produce an ignition timing deciding signal; means for selectively distributing an ignition timing signal to

N. Onogi; M. Shimamoto

1987-01-01

343

Effects of Nozzle Scale, Total Temperature and an Afterburner on Jet Noise from a Pre-Cooled Turbojet Engine  

Microsoft Academic Search

Effects of nozzle scale, total temperature, and an afterburner on jet noise characteristics from a pre-cooled turbojet engine are investigated experimentally. In JAXA (Japan Aerospace Exploration Agency), a pre-cooled turbojet engine for an HST (Hypersonic transport) is under development. In the present study, 1.0%- and 2.4%-scaled models of the rectangular plug nozzle (Nozzles I and II) are manufactured, and the

Mikiya Araki; Takayuki Sano; Masayuki Fukuda; Takayuki Kojima; Hideyuki Taguchi; Shunsuke Nishida; Osamu Imamura; Seiichi Shiga; Mitsuhiro Tsue

2009-01-01

344

Indirect evaporative cooling potential in airwater systems in temperate climates  

Microsoft Academic Search

Recent developments have prompted a review of evaporative cooling technology as an effective means of cooling modern deep plan buildings. Prominent among these developments is the success of high temperature sensible cooling systems, particularly, chilled ceilings, which require a supply of cooling water at 1418C. Crucial to the success of evaporative cooling technology, as a significant means of cooling in

Ben Costelloe; Donal Finn

2003-01-01

345

Lubricating oil filtration system for an engine  

Microsoft Academic Search

An oil filtering system is described for an engine including a drive shaft, a lubricating system for the engine, an oil sump, a governor for controlling a throttle of the engine. The governor includes driven means drivingly interconnected with the drive shaft. The oil filtering system comprises: a housing; an oil inlet means defined in the housing in flow communication

Kronich

1987-01-01

346

A nuclear power plant system engineering workstation  

Microsoft Academic Search

System engineers offer an approach for effective technical support for operation and maintenance of nuclear power plants. System engineer groups are being set up by most utilities in the United States. Institute of Nuclear Power operations (INPO) and U.S. Nuclear Regulatory Commission (NRC) have endorsed the concept. The INPO Good Practice and a survey of system engineer programs in the

J. H. Mason; J. W. Crosby

1989-01-01

347

Industrial Biosystems Engineering and Biorefinery Systems  

Microsoft Academic Search

The concept of Industrial Biosystems Engineering (IBsE) was suggested as a new engineering branch to be developed for meeting the needs of science and technology professionals in the upcoming bioeconomy. With emphasis on systems, IBsE built upon the interfaces between systems biology, bioprocessing, and systems engineering. This article discusses the background, the suggested definition, the theoretical framework, and methodologies of

Shulin Chen

2008-01-01

348

Developing, testing, evaluating and optimizing solar heating and cooling systems  

SciTech Connect

The objective is to develop and test various integrated solar heating, cooling and domestic hot water systems, and to evaluate their performance. Systems composed of new, as well as previously tested, components are carefully integrated so that effects of new components on system performance can be clearly delineated. The SEAL-DOE program includes six tasks which have received funding for the 1991--92 fifteen-month period. These include: (1) a project employing isothermal operation of air and liquid solar space heating systems; (2) a project to build and test several generic solar water heaters; (3) a project that will evaluate advanced solar domestic hot water components and concepts and integrate them into solar domestic hot water systems; (4) a liquid desiccant cooling system development project; (5) a project that will perform system modeling and analysis work on solid desiccant cooling systems research; and (6) a management task. The objectives and progress in each task are described in this report.

Not Available

1992-01-24

349

46 CFR 111.59-3 - No mechanical cooling.  

Code of Federal Regulations, 2010 CFR

...2009-10-01 false No mechanical cooling. 111.59-3...CONTINUED) ELECTRICAL ENGINEERING ELECTRIC SYSTEMS-GENERAL... § 111.59-3 No mechanical cooling. A busway must not need mechanical cooling to operate...

2009-10-01

350

46 CFR 111.59-3 - No mechanical cooling.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false No mechanical cooling. 111.59-3...CONTINUED) ELECTRICAL ENGINEERING ELECTRIC SYSTEMS-GENERAL... § 111.59-3 No mechanical cooling. A busway must not need mechanical cooling to operate...

2010-10-01

351

Emerging microbial control issues in cooling water systems  

SciTech Connect

Microbial life affects everything including many industrial processes. The nature and activity of microorganisms determines whether their presence is beneficial or destructive. In cooling towers, the destructive capability of these organisms is manifested. The microorganisms that inhabit industrial cooling water systems can adversely affect the efficiency of the operation by their sheer number and diversity, metabolic wastes or deposits and associated corrosion. Microbiologically influenced corrosion is emerging as a serious problem in cooling systems. This article brings into focus the problems created by microbial infestations in cooling water systems and the control procedures evolved to combat them. Further, the future strategies being evolved in view of environmental concerns with biocides currently used are also discussed.

Choudhary, S.G. [Tata Chemicals Ltd., Babrala (India)

1998-05-01

352

Multimedia Feedback Systems for Engineering  

SciTech Connect

The World Wide Web has become a key tool for information sharing. Engineers and scientists are finding that the web is especially suited to publishing the graphical, multi-layered information that is typical of their work. Web pages are easier to distribute than hardcopy. Web movies have become more accessible, in many offices, than videos. Good VRML viewing software, bundled with most new PCs, has sufficient power to support many engineering needs. In addition to publishing information science and engineering has an important tradition of peer and customer review. Reports, drawings and graphs are typically printed, distributed, reviewed, marked up, and returned to the author. Adding review comments to paper is easy. When, however, the information is in electronic form, this ease of review goes away. It's hard to write on videos. It's even harder to write comments on animated 3D models. These feedback limitations reduce the value of the information overall. Fortunately, the web can also be a useful tool for collecting peer and customer review information. When properly formed, web reports, movies, and 3D animations can be readily linked to review notes. This paper describes three multimedia feed-back systems that Sandia National Laboratories has developed to tap that potential. Each system allows people to make context-sensitive comments about specific web content and electronically ties the comments back to the web content being referenced. The fuel system ties comments to specific web pages, the second system ties the comments to specific frames of digital movies, and the third ties the comments to specific times and viewpoints within 3D animations. In addition to the technologies, this paper describes how they are being used to support intelligent machine systems design at Sandia.

Gladwell, S.; Gottlieb, E.J.; McDonald, M.J.; Slutter, C.L.

1998-12-15

353

Simulation of a VAV air conditioning system in an existing building for the cooling mode  

Microsoft Academic Search

In this study, simulation of a variable air volume (VAV) air conditioning system in an existing office building is presented for the cooling mode. A building simulation package was used for the simulation [DOE, EnergyPlus Engineering Document, Version 1.3., U.S. Department of Energy, Washington, DC, 2005]. The design information of the existing office building, the actual number of the internal

Tolga N. Aynur; Yunho Hwang; Reinhard Radermacher

2009-01-01

354

Comparison of the performance of falling film and bubble absorbers for air-cooled absorption systems  

Microsoft Academic Search

Small capacity, air-cooled NH3H2O absorption systems are becoming more attractive in applications where the input energy can be obtained for free (e.g., solar energy, exhaust gases of engines), due to the increasing price of the primary energy. One of the main difficulties for a wider use of absorption machines is the necessary high initial investment. For this reason, the development

J. Castro; C. Oliet; I. Rodrguez; A. Oliva

2009-01-01

355

Data Integration for Military Systems Engineering  

Microsoft Academic Search

Military systems have many of the same concerns as commercial systems, that is, real-time performance, availability, security, safety, life-cycle maintenance and upgrade. In military systems, however these concerns are encountered in combinations and intensity that few commercial systems can rival. The integration needs for total system engineering of military systems are far ranging across integration types, engineering domains, and technologies.

Ngocdung Hoang; Michael Jenkins; Nicholas Karangelen

1996-01-01

356

Condensate Cooling System of the 60 MW Turbine with Combined Wet--Dry Cooling Tower (A-1).  

National Technical Information Service (NTIS)

The air-condensation cooling system with a wet-dry cooling tower to be used on the first unit of a 3-unit 380 MW heat- and power-producing power plant in the USSR is described. Unlike the traditional evaporation coolers (tower and ventilator cooling tower...

1977-01-01

357

NONWATER QUALITY IMPACTS OF CLOSED-CYCLE COOLING SYSTEMS AND THE INTERACTION OF STACK GAS AND COOLING TOWER PLUMES  

EPA Science Inventory

The report gives results of a literature survey of the nonwater quality impacts of closed-cycle cooling systems. Following discussions of cooling tower and stack gas plumes, interactions of these plumes are considered. For cooling tower plumes, plume types, behavior, salt drift g...

358

Desiccant dehumidification and cooling systems assessment and analysis  

SciTech Connect

The objective of this report is to provide a preliminary analysis of the principles, sensitivities, and potential for national energy savings of desiccant cooling and dehumidification systems. The report is divided into four sections. Section I deals with the maximum theoretical performance of ideal desiccant cooling systems. Section II looks at the performance effects of non-ideal behavior of system components. Section III examines the effects of outdoor air properties on desiccant cooling system performance. Section IV analyzes the applicability of desiccant cooling systems to reduce primary energy requirements for providing space conditioning in buildings. A basic desiccation process performs no useful work (cooling). That is, a desiccant material drying air is close to an isenthalpic process. Latent energy is merely converted to sensible energy. Only when heat exchange is applied to the desiccated air is any cooling accomplished. This characteristic is generic to all desiccant cycles and critical to understanding their operation. The analyses of Section I show that desiccant cooling cycles can theoretically achieve extremely high thermal CoP`s (>2). The general conclusion from Section II is that ventilation air processing is the most viable application for the solid desiccant equipment analyzed. The results from the seasonal simulations performed in Section III indicate that, generally, the seasonal performance of the desiccant system does not change significantly from that predicted for outdoor conditions. Results from Section IV show that all of the candidate desiccant systems can save energy relative to standard vapor-compression systems. The largest energy savings are achieved by the enthalpy exchange devise.

Collier, R.K. Jr. [Collier Engineering, Reno, NV (United States)

1997-09-01

359

Advanced Desiccant Cooling System Development. Final Report, September 1982-June 1990.  

National Technical Information Service (NTIS)

A gas-fueled cooling system based on the concept of desiccant dehumidification was developed. The system uses a solid desiccant to perform dehumidification. After removal of the moisture, the air is sensibly cooled by heat exchange and evaporative cooling...

B. Cohen M. Ross R. Arora J. Swanson P. Sarkisian

1990-01-01

360

40 CFR 749.68 - Hexavalent chromium-based water treatment chemicals in cooling systems.  

Code of Federal Regulations, 2010 CFR

...Hexavalent chromium-based water treatment chemicals in cooling systems. 749...SUBSTANCES CONTROL ACT WATER TREATMENT CHEMICALS Air Conditioning and Cooling...Hexavalent chromium-based water treatment chemicals in cooling systems....

2009-07-01

361

40 CFR 749.68 - Hexavalent chromium-based water treatment chemicals in cooling systems.  

Code of Federal Regulations, 2010 CFR

...Hexavalent chromium-based water treatment chemicals in cooling systems. 749...SUBSTANCES CONTROL ACT WATER TREATMENT CHEMICALS Air Conditioning and Cooling...Hexavalent chromium-based water treatment chemicals in cooling systems....

2010-07-01

362

Engine driven heating system components for Stirling engines  

Microsoft Academic Search

A mechanical drive system permits a single electric motor to drive at least three rotary components necessary to the cold starting of a Stirling engine. These components comprise a rotary preheater, an air atomizing pump for facilitating proper injection of fuel particle size, and a combustion air blower, all necessary to heat the working gas of a Stirling engine prior

L. A. Reams; A. E. Geddes

1978-01-01

363

Potential Applications of the Ceramic Thrust Chamber Technology for Future Transpiration Cooled Rocket Engines  

NASA Astrophysics Data System (ADS)

The long-term development of ceramic rocket engine thrust chambers at the German Aerospace Center(DLR) currently leads to designs of self-sustaining, transpiration-cooled, fiber-reinforced ceramic rocket engine chamber structures.This paper discusses characteristic issues and potential benefits introduced by this technology. Achievable benefits are the reduction of weight and manufacturing cost, as well as an increased reliability and higher lifetime due to thermal cycle stability.Experiments with porous Ceramic Matrix Composite(CMC) materials for rocket engine chamber walls have been conducted at the DLR since the end of the 1990s.This paper discusses the current status of DLR's ceramic thrust chamber technology and potential applications for high thrust engines.The manufacturing process and the design concept are explained.The impact of variations of engine parameters(chamber pressure and diam-eter)on the required coolant mass flow are discussed.Due to favorable scaling effects a high thrust application utilizes all benefits of the discussed technology, while avoiding the most significant performance drawbacks.

Herbertz, Armin; Ortelt, Markus; Mller, Ilja; Hald, Hermann

364

Closed-loop electroosmotic microchannel cooling system for VLSI circuits  

Microsoft Academic Search

The increasing heat generation rates in VLSI circuits motivate research on compact cooling technologies with low thermal resistance. This paper develops a closed-loop two-phase microchannel cooling system using electroosmotic pumping for the working fluid. The design, fabrication, and open-loop performance of the heat exchanger and pump are summarized. The silicon heat exchanger, which attaches to the test chip (1 cm2),

Linan Jiang; James Mikkelsen; Jae-Mo Koo; David Huber; Shuhuai Yao; Lian Zhang; Peng Zhou; James G. Maveety; Ravi Prasher; Juan G. Santiago; Thomas W. Kenny; Kenneth E. Goodson

2002-01-01

365

Integrated Liquid Cooling Systems for 3-D Stacked TSV Modules  

Microsoft Academic Search

In this paper, an integrated liquid cooling system for 3-D stacked modules with high dissipation level is proposed. The fluidic interconnects in this system are elaborated and the sealing technique for different fluid interfaces is discussed. Meanwhile, the pressure drop for each part of the system is analyzed. The optimized fluidic interconnects minimizing the pressure drop have been designed and

Gong Yue Tang; Siow Pin Tan; Navas Khan; D. Pinjala; John H. Lau; Ai Bin Yu; Kripesh Vaidyanathan; Kok Chuan Toh

2010-01-01

366

Fundamental Aspects of Ozone Chemistry in Recirculating Cooling Water Systems Data Evaluation Needs  

Microsoft Academic Search

Proposed uses of ozone for stand-alone cooling water treatment raise critical questions as to what happens chemically. These questions are of more significance to industrial cooling water systems, which typically have higher temperatures and cooling ranges than do comfort cooling systems. When applying ozone to cooling waters, it is very important for the user to understand many fundamental aspects of

Rip G. Rice; J. Fred Wilkes

1992-01-01

367

Modeling of Rankine cycle\\/vapor compression cycle cooling systems for solar energy applications  

Microsoft Academic Search

Solar cooling system computer simulations were utilized in the determination of daily and seasonal cooling performance and in determining design values such as cooling capacity, collector area, storage size, and sizes of pumps and piping. RC\\/VCC solar cooling systems converted collected solar heat into a cooling effect. This was accomplished at the site of the installation by using the Rankine

A. N. Egrican

1977-01-01

368

Computer-Aided Manufacturing System Engineering  

Microsoft Academic Search

A new type of computer-aided engineering environment is envisioned which will improve the productivity of manufacturing\\/industrial engineers. This environment would be used by engineers to design and implement future manufacturing systems and subsystems. This paper describes work which is currently underway at the United States National Institute of Standards and Technology (NIST) on computer-aided manufacturing system engineering environments. The NIST

C. R. Mclean

1993-01-01

369

Soy-Based, Water-Cooled, TC W-III Two Cycle Engine Oil  

SciTech Connect

The objective of this project was to achieve technical approval and commercial launch for a biodegradable soy oil-based, environmentally safe, TC W-III performance, water-cooled, two cycle engine oil. To do so would: (1) develop a new use for RBD soybean oil; (2) increase soybean utilization in North America in the range of 500 K-3.0 MM bushels; and (3) open up supply opportunities of 1.5-5.0 MM bushels worldwide. These goals have been successfully obtained.

Scharf, Curtis R.; Miller, Mark E.

2003-08-30

370

COOLING FAN AND SYSTEM PERFORMANCE AND EFFICIENCY IMPROVEMENTS  

SciTech Connect

Upcoming emissions regulations (Tiers 3, 4a and 4b) are imposing significantly higher heat loads on the cooling system than lesser regulated machines. This work was a suite of tasks aimed at reducing the parasitic losses of the cooling system, or improving the design process through six distinct tasks: 1. Develop an axial fan that will provide more airflow, with less input power and less noise. The initial plan was to use Genetic Algorithms to do an automated fan design, incorporating forward sweep for low noise. First and second generation concepts could not meet either performance or sound goals. An experienced turbomachinery designer, using a specialized CFD analysis program has taken over the design and has been able to demonstrate a 5% flow improvement (vs 10% goal) and 10% efficiency improvement (vs 10% goal) using blade twist only. 2. Fan shroud developments, using an 'aeroshroud' concept developed at Michigan State University. Performance testing at Michigan State University showed the design is capable of meeting the goal of a 10% increase in flow, but over a very narrow operating range of fan performance. The goal of 10% increase in fan efficiency was not met. Fan noise was reduced from 0 to 2dB, vs. a goal of 5dB at constant airflow. The narrow range of fan operating conditions affected by the aeroshroud makes this concept unattractive for further development at this time 3. Improved axial fan system modeling is needed to accommodate the numbers of cooling systems to be redesigned to meet lower emissions requirements. A CFD fan system modeling guide has been completed and transferred to design engineers. Current, uncontrolled modeling practices produce flow estimates in some cases within 5% of measured values, and in some cases within 25% of measured values. The techniques in the modeling guide reduced variability to the goal of + 5% for the case under study. 4. Demonstrate the performance and design versatility of a high performance fan. A 'swept blade mixed flow' fan was rapid prototyped from cast aluminum for a performance demonstration on a small construction machine. The fan was mounted directly in place of the conventional fan (relatively close to the engine). The goal was to provide equal airflow at constant fan speed, with 75% of the input power and 5 dB quieter than the conventional fan. The result was a significant loss in flow with the prototype due to its sensitivity to downstream blockage. This sensitivity to downstream blockage affects flow, efficiency, and noise all negatively, and further development was terminated. 5. Develop a high efficiency variable speed fan drive to replace existing slipping clutch style fan drives. The goal for this task was to provide a continuously variable speed fan drive with an efficiency of 95%+ at max speed, and losses no greater than at max speed as the fan speed would vary throughout its entire speed range. The process developed to quantify the fuel savings potential of a variable speed fan drive has produced a simple tool to predict the fuel savings of a variable speed drive, and has sparked significant interest in the use of variable speed fan drive for Tier 3 emissions compliant machines. The proposed dual ratio slipping clutch variable speed fan drive can provide a more efficient system than a conventional single ratio slipping clutch fan drive, but could not meet the established performance goals of this task, so this task was halted in a gate review prior to the start of detailed design. 6. Develop a cooling system air filtration device to allow the use of automotive style high performance heat exchangers currently in off road machines. The goal of this task was to provide a radiator air filtration system that could allow high fin density, louvered radiators to operate in a find dust application with the same resistance to fouling as a current production off-road radiator design. Initial sensitivity testing demonstrated that fan speed has a significant impact on the fouling of radiator cores due to fine dusts, so machines equipped with continuously variabl

Ronald Dupree

2005-07-31

371

Assessing maintenance of evaporative cooling systems in legionellosis outbreaks.  

PubMed

This study was designed to conduct systematic reviews of existing evaporative cooling system maintenance guidelines and of published Legionnaires' disease outbreaks to determine what, if any, maintenance practices were in place at the time of the disease outbreaks and then to contrast the reported practices with the published guidelines for evaporative cooling systems. For the first review, similarities in the reported recommendations were assessed; in the second review, any reported information about the state of the evaporative cooling system during the outbreak investigation was summarized. The systematic reviews yielded 38 current guidelines for evaporative cooling systems and 38 published outbreak investigations. The guidelines varied regarding the recommended type and dose of biocides, frequency of general inspections and total system maintenance, the preferred disinfection and cleaning procedures when testing a system for microbiological contamination, the type and frequency of testing procedures, and interpretation of test results. Overall, the maintenance guidelines did not contain sufficiently detailed procedures to prevent the problems that were observed in the outbreak investigations. These maintenance procedures included lack or improper use of a biocide; infrequent testing for microbiological contamination; improper use or maintenance of drift eliminators; and lack of a total system cleaning within 6 months of the outbreak for cooling systems that were either under continuous use, recently started up, or frequently switched on and off. This study suggests that more specific and standardized maintenance guidelines for the control of Legionella bacteria are needed and that these guidelines must be properly implemented to help reduce further Legionnaires' disease outbreaks associated with evaporative cooling systems. PMID:21416443

Rangel, Kelly M; Delclos, George; Emery, Robert; Symanski, Elaine

2011-04-01

372

Gas-cooled reactor power systems for space  

SciTech Connect

In this paper the characteristics of six designs for power levels of 2, 10, and 20 MWe for operating times of 1 and 7 y are described. The operating conditions for these arbitrary designs were chosen to minimize system specific mass. The designs are based on recent work which benefits from earlier analyses of nuclear space power systems conducted at our Laboratory. Both gas- and liquid-cooled reactors had been considered. Pitts and Walter (1970) reported on the results of a detailed study of a 10-MWe lithium-cooled reactor in a potassium Rankine system. Unpublished results (1966) of a computer analysis provide details of an argon-cooled reactor in an argon Brayton system. The gas-cooled reactor design was based on extensive development work on the 500-MWth reactor for the nuclear ramjet (Pluto) as described by Walter (1964). The designs discussed here draw heavily on the Pluto project experience, which culminated in a successful full-power ground test as reported by Reynolds (1964). At higher power levels gas-cooled reactors coupled with Brayton systems with advanced radiator designs become attractive.

Walter, C.E.

1987-01-01

373

Plan for Systems Engineering of the NRD Data Transmission System.  

National Technical Information Service (NTIS)

A proposed systems engineering plan is presented which would be used as a guide in accomplishing systems analysis and engineering to support the NRD Data Transmission System Improvement Program. The need to relate specific performance parameters of the NR...

O. Cardinale

1968-01-01

374

Tank waste remediation system systems engineering management plan.  

National Technical Information Service (NTIS)

This Systems Engineering Management Plan (SEMP) describes the Tank Waste Remediation System (TWRS) implementation of the US Department of Energy (DOE) systems engineering policy provided in 97-IMSD-193. The SEMP defines the products, process, organization...

L. G. Peck

1998-01-01

375

A mixed-gas miniature Joule-Thomson cooling system  

NASA Astrophysics Data System (ADS)

A mixed-gas Joule-Thomson (JT) cooling system is investigated in which a micromachined JT cold stage of 60 10 0.7 mm3 is combined with a linear compressor. The cooling system is operated between 1.3 bar and 9.4 bar with a ternary gas mixture of 39 mol% methane, 20 mol% ethane and 41 mol% isobutane. It cools down to below 130 K, and at a cold-tip temperature of 150 K, a cooling power of 46 mW is obtained at a mass-flow rate of 1.35 mg s-1. The background losses are experimentally determined to be 20 mW and are in good agreement with the calculated value of 21 mW. The linear compressor can be used to drive 19 of these miniature JT cold stages in parallel, e.g. for cooling optical detectors in future space missions. In this mode, the compressor pressure ratio is slightly less, resulting in a net cooling power of 23 mW per miniature JT cold stage.

Derking, J. H.; Vermeer, C. H.; Tirolien, T.; Crook, M. R.; ter Brake, H. J. M.

2013-10-01

376

40 CFR 92.116 - Engine output measurement system calibrations.  

Code of Federal Regulations, 2012 CFR

... Engine output measurement system calibrations. 92.116 Section 92.116 ...Engine output measurement system calibrations. (a) General requirements for dynamometer calibration. (1) The engine flywheel...

2012-07-01

377

COMMIX analysis of AP-600 Passive Containment Cooling System  

SciTech Connect

COMMIX modeling and basic concepts that relate components, i.e., containment, water film cooling, and natural draft air flow systems. of the AP-600 Passive Containment Cooling System are discussed. The critical safety issues during a postulated accident have been identified as (1) maintaining the liquid film outside the steel containment vessel, (2) ensuring the natural convection in the air annulus. and (3) quantifying both heat and mass transfer accurately for the system. The lack of appropriate heat and mass transfer models in the present analysis is addressed. and additional assessment and validation of the proposed models is proposed.

Chang, J.F.C.; Chien, T.H.; Ding, J.; Sun, J.G.; Sha, W.T.

1992-11-01

378

COMMIX analysis of AP-600 Passive Containment Cooling System  

SciTech Connect

COMMIX modeling and basic concepts that relate components, i.e., containment, water film cooling, and natural draft air flow systems. of the AP-600 Passive Containment Cooling System are discussed. The critical safety issues during a postulated accident have been identified as (1) maintaining the liquid film outside the steel containment vessel, (2) ensuring the natural convection in the air annulus. and (3) quantifying both heat and mass transfer accurately for the system. The lack of appropriate heat and mass transfer models in the present analysis is addressed. and additional assessment and validation of the proposed models is proposed.

Chang, J.F.C.; Chien, T.H.; Ding, J.; Sun, J.G.; Sha, W.T.

1992-01-01

379

Discrete-frequency and broadband noise radiation from diesel engine cooling fans  

NASA Astrophysics Data System (ADS)

This effort focuses on measuring and predicting the discrete-frequency and broadband noise radiated by diesel engine cooling fans. Unsteady forces developed by the interaction of the fan blade with inlet flow are the dominant source for both discrete-frequency and broadband noise of the subject propeller fan. In many cases, a primary source of discrepancy between fan noise prediction and measurement is due to incomplete description of the fan inflow. Particularly, in such engine cooling systems where space is very limited, it would be very difficult, if not, impossible to measure the fan inflow velocity field using the conventional, stationary hot-wire method. Instead, the fan inflow was measured with two-component x-type hot-film probes attached very close to the leading edge of a rotating blade. One of the advantages of the blade-mounted-probe measurement technique is that it measures velocities relative to the rotating probe, which enables the acquired data to be applied directly in many aerodynamic theories that have been developed for the airfoil fixed-coordinate system. However, the velocity time data measured by this technique contains the spatially non-uniform mean velocity field along with the temporal fluctuations. A phase-locked averaging technique was successfully employed to decompose the velocity data into time-invariant flow distortions and fluctuations due to turbulence. The angles of attack of the fan blades, obtained from inlet flow measurements, indicate that the blades are stalled. The fan's radiated noise was measured without contamination from the engine noise by driving the fan with an electric motor. The motor operated at a constant speed while a pair of speed controllable pulleys controlled the fan speed. Narrowband and 1/3-octave band sound power of the cooling fan was measured by using the comparison method with a reference sound source in a reverberant room. The spatially non-uniform mean velocity field was used in axial-flow fan noise theory to predict the discrete-frequency noise at the blade passing frequency (BPF) and harmonics. The unsteady lift was predicted by considering transverse and longitudinal velocity fluctuations. The influences due to an upstream finger guard were also investigated. The radiated sound power spectra that were measured for the fan are shown to be in excellent agreement with those predicted. The agreement between prediction and measurement is only fair at the fundamental BPF tone. Further experimental investigations revealed that the interaction noise between the fan blades and a shroud surrounding the fan might be the dominant source for the radiation at the first harmonic. The space-time correlation functions of the inflow velocity fluctuations were measured and utilized in stochastic lifting surface theory to calculate the unsteady blade lift and resulting broadband fan noise. The integral length scale of the inlet flow was found to be much smaller than the blade-to-blade separate distance of the fan. Therefore, contributions from blade-to-blade correlations of the various elements on different blades were found to be negligible and hence ignored; only the correlations between the strip elements on a given blade were considered. The cross-correlations measured between elements separated by more than the integral length scale were also found to be negligibly small. The predicted broadband sound power spectra agree well with those measured for frequencies greater than 400 Hz. There are deviations between the predictions and measurements at lower frequencies. These are likely due to fan blade stall, and possibly, anomalies in the noise measurement environment. In order to reduce the sound radiation at the blade rate tones, the baseline fan was replaced with a skewed fan. The backward skew angle of 30 was found to effectively reduce the 2nd and higher harmonics of the blade rate tone. The interaction of the shroud opening and the blade tips dominates the sound level at the fundamental tone. This tone was successfully reduced by incorporating a serrated shroud ope

Kim, Geon-Seok

380

Behavior of power-limited transverse stochastic cooling systems  

SciTech Connect

Analysis of stochastic cooling systems is usually done under the assumption that the system performance is not limited by the available electronic gain. In practical systems, it may prove to be the case that cost-induced limitations on the maximum available output power restrict the maximum attainable gain, thereby restricting it to be less than its optimal value. Such is the case in the anti-proton sources at both CERN and Fermilab. The criteria that one would employ in, for example, upgrading such a power-limited system prove to be rather different from those for a system for which one can optimize the gain. In the following sections we first develop the formulas relevant to the behavior of power-limited cooling systems; we limit our treatment throughout to the case of systems which cool the transverse phase space of the beam. We then discuss the implications of our results for the upgrade of such cooling systems, contrasting this case with that for systems in which the electronic gain can be optimized. Finally, we apply our results to the specific case of the Fermilab debuncher ring. 3 refs., 1 fig., 2 tabs.

Goldberg, D.A.; Lambertson, G.R.

1988-07-01

381

Systems engineering and analysis. Third edition  

Microsoft Academic Search

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

B. S. Blanchard; W. J. Fabrycky

1998-01-01

382

Engineering design of a liquid metal cooled self-pumped limiter for a tokamak reactor  

Microsoft Academic Search

A lithium cooled self-pumped limiter has been designed as the impurity control system for the TPSS high-..beta.. power reactor conceptual design. The limiter removes helium by trapping impinging helium ions in freshly deposited vanadium surface layers in a slot region. No hydrogen is removed and no pumps or vacuum penetrations are used, thereby eliminating penetration shielding and reducing tritium handling.

J. N. Brooks; Y. Cha; A. Hassanein; S. Majumdar; R. F. Mattas; D. L. Smith

1987-01-01

383

Timonium Elementary School Solar Energy Heating and Cooling Augmentation Experiment. Final Engineering Report. Executive Summary.  

ERIC Educational Resources Information Center

|This report covers a two-year and seven-month solar space heating and cooling experiment conducted at the Timonium Elementary School, Timonium, Maryland. The system was designed to provide a minimum of 50 percent of the energy required during the heating season and to determine the feasibility of using solar energy to power absorption-type

AAI Corp., Baltimore, MD.

384

Timonium Elementary School Solar Energy Heating and Cooling Augmentation Experiment. Final Engineering Report. Executive Summary.  

ERIC Educational Resources Information Center

This report covers a two-year and seven-month solar space heating and cooling experiment conducted at the Timonium Elementary School, Timonium, Maryland. The system was designed to provide a minimum of 50 percent of the energy required during the heating season and to determine the feasibility of using solar energy to power absorption-type

AAI Corp., Baltimore, MD.

385

Advanced Techniques Employed in Blade Cooling Research.  

National Technical Information Service (NTIS)

The design of an advance cooling system for moderately cooled second stage gas turbine engine blades was undertaken as part of a demonstration project. The design process involving complex computer modeling and hot rig testing of the blades is described. ...

H. E. Rogers C. Graham K. McNicholas

1987-01-01

386

A System for Cooling inside a Glove Box  

ERIC Educational Resources Information Center

|An easy, efficient, reliable, and low-cost method of constructing a cooling system using a simple circulating pump is described. The system is employed in conjunction with an inert atmosphere glove box to achieve the synthesis of air- and moisture-sensitive compounds inside the glove box at controlled, low temperatures without contaminating the

Sanz, Martial

2010-01-01

387

Correcting Aberrations in Complex Magnet Systems for Muon Cooling Channels  

Microsoft Academic Search

Designing and simulating complex magnet systems needed for cooling channels in both neutrino factories and muon colliders requires innovative techniques to correct for both chromatic and spherical aberrations. Optimizing complex systems, such as helical magnets for example, is also difficult but essential. By using COSY INFINITY, a differential algebra based code, the transfer and aberration maps can be examined to

J. A. Maloney; B. Erdelyi; A. Afanaciev; R. P. Johnson; Y. S. Derbenev; V. S. Morozov

2011-01-01

388

Potential environmental impacts of solar heating and cooling systems  

Microsoft Academic Search

The identification of potential environmental effects of solar heating and cooling systems is given, including a discussion of the increases and decreases in air, water, and solid waste residuals associated with these systems. In addition, other impacts which are more qualitative but no less concrete in nature, including aesthetic, social, and consumer safety considerations, are also identified. These qualitative impacts

T. J. Consroe; F. M. Glaser; R. W. Jr. Shaw

1976-01-01

389

Resonance Control Cooling System for the APT/LEDA RFQ  

SciTech Connect

The Radio Frequency Quadrupole (RFQ) resonance control cooling system (RCCS) for the Low Energy Demonstration Accelerator (LEDA) in support of the Accelerator Production of Tritium (APT) is described. Constant flow regulating valves to distribute the required flow to the 424 channels and to permit use of centrifugal pumps is discussed. Control system schema are described to regulate resonance frequency during steady state operation.

Domer, G.A.; Floersch, R.H.

1998-11-04

390

The evaporative cooling system for the ATLAS inner detector  

Microsoft Academic Search

This paper describes the evaporative system used to cool the silicon detector structures of the inner detector sub-detectors of the ATLAS experiment at the CERN Large Hadron Collider. The motivation for an evaporative system, its design and construction are discussed. In detail the particular requirements of the ATLAS inner detector, technical choices and the qualification and manufacture of final components

D. Attree; B. Anderson; E. C. Anderssen; V. Akhnazarov; R. J. Apsimon; P. Barclay; L. E. Batchelor; R. L. Bates; M. Battistin; J. Bendotti; S. Berry; A. Bitadze; J. P. Bizzel; P. Bonneau; M. Bosteels; J. M. Butterworth; S. Butterworth; A. A. Carter; J. R. Carter; A. Catinaccio; F. Corbaz; H. O. Danielsson; E. Danilevich; N. Dixon; S. D. Dixon; F. Doherty; O. Dorholt; M. Doubrava; K. Egorov; K. Einsweiler; A. C. Falou; P. Feraudet; P. Ferrari; K. Fowler; J. T. Fraser; R. S. French; M. Galuska; F. Gannaway; G. Gariano; M. D. Gibson; M. Gilchriese; D. Giugni; J. Godlewski; I. Gousakov; B. Gorski; G. D. Hallewell; N. Hartman; R. J. Hawkings; S. J. Haywood; N. P. Hessey; I. Ilyashenko; S. Infante; J. N. Jackson; T. J. Jones; J. Kaplon; S. Katunin; S. Lindsay; L. Luisa; N. Massol; F. Mc Ewan; S. J. Mc Mahon; C. Menot; J. Mistry; J. Morris; D. M. Muskett; K. Nagai; A. Nichols; R. Nicholson; R. B. Nickerson; S. L. Nielsen; P. E. Nordahl; M. Olcese; M. Parodi; F. Perez-Gomez; H. Pernegger; E. Perrin; L. P. Rossi; A. Rovani; E. Ruscino; H. Sandaker; A. Smith; V. Sopko; S. Stapnes; M. Stodulski; J. Tarrant; J. Thadome; D. Tovey; M. Turala; M. Tyndel; V. Vacek; E. van der Kraaij; G. H. A. Viehhauser; E. Vigeolas; P. S. Wells; S. Wenig; P. Werneke

2008-01-01

391

Solar cooling with concentrating photovoltaic\\/thermal (CPVT) systems  

Microsoft Academic Search

Simultaneous production of electrical and high grade thermal energy is proposed with a concentrating photovoltaic\\/thermal (CPVT) system operating at elevated temperature. CPVT collectors may operate at temperatures above 100C, and the thermal energy can drive processes such as refrigeration, desalination and steam production. The performance and cost of a CPVT system with single effect absorption cooling are investigated in detail.

Gur Mittelman; Abraham Kribus; Abraham Dayan

2007-01-01

392

A System for Cooling inside a Glove Box  

ERIC Educational Resources Information Center

An easy, efficient, reliable, and low-cost method of constructing a cooling system using a simple circulating pump is described. The system is employed in conjunction with an inert atmosphere glove box to achieve the synthesis of air- and moisture-sensitive compounds inside the glove box at controlled, low temperatures without contaminating the

Sanz, Martial

2010-01-01

393

Performance evaluation of solar absorption cooling system of Bahal (Haryana)  

Microsoft Academic Search

This study presents the modeling of a solar -powered, single-stage, absorption cooling system using a flat plate collector and water-lithium bromide solution. A modular computer program has been developed for the absorp- tion system to simulate various cycle configurations with the help of weather data of village Bahal, Distt. Bh i- wani, Haryana, India. The effects of hot water inlet

V. MITTAL; K. S. KASANA; N. S. THAKUR

2005-01-01

394

Advanced solar\\/gas desiccant cooling system. Final report  

Microsoft Academic Search

The results are documented of a research and development effort to produce a desiccant cooling system with significantly higher thermal efficiency than current state-of-the-art desiccant systems. The report findings and data are based on extensive computer modeling and actual operating test results of an experimental breadboard unit employing a totally new approach. For the separation of moisture from an airstream

B. Huskey; J. Sharp; A. Venero; H. Yen

1982-01-01

395

Modeling a grid-connected, passively-cooled CPV system  

NASA Astrophysics Data System (ADS)

A 4-parameter formula is proposed for describing the hourly AC performance of a grid-connected, passively-cooled CPV system. The formula is validated against data from a pair of Soitec systems in the northern and southern hemispheres and found to be accurate to at least +/- 10% at all times of the year.

Strobach, E.; Faiman, D.; Melnichak, V.; Bukobza, D.; Kabalo, S.; Gombert, A.; Gerstmaier, T.; Roettger, M.

2012-10-01

396

Heat Pipe Cooling System with Sensible Heat Sink.  

National Technical Information Service (NTIS)

A heat pipe cooling system which employs a sensible heat sink is discussed. With this type of system, incident aerodynamic heat is transported via a heat pipe from the stagnation region to the heat sink and absorbed by raising the temperature of the heat ...

C. C. Silverstein

1988-01-01

397

Compact systems cool solid-state and gas lasers  

SciTech Connect

The design of a high-performance laser-cooling system requires careful integration of a number of components. The type of laser and its end use will determine the relative importance of individual system attributes. A Nd:YAG laser, for example, will require that no cooper be used in the deionized-water circuit. A laser used in a doctor's office will need to have lower fan and pump noise than one used on a factory floor. The optimum cooling system for a particular application will be the result of a number of iterations and compromises that satisfy the heat-transfer requirements and maintain the needs of both laser manufacturer and end user. This article addresses the cooling needs of both solid-state and gas lasers from the viewpoint of the laser supplier and the end user.

Goldman, R.D. (Iytron Inc., Woburn, MA (USS))

1991-03-01

398

Improve corrosion and deposition control in alkaline cooling water systems  

SciTech Connect

Utility operators can use a calcium carbonate inhibitor to improve corrosion control and meet environmental discharge limits for phosphorus on cooling water systems. Due to volume, maintaining cooling towers` operating parameters such as pH, Cl{sub 2}, cycles, etc., are a huge endeavor to balance water chemistry. The goal of a cooling water system is to provide a reliable heat-transfer medium--water--to numerous exchangers without impairing the energy transfer efficiency. Traditionally, alkaline phosphate and alkaline-zinc based programs have been used to control corrosion and minimize scaling of heat-transfer surfaces. However, restrictions on phosphate discharges for water systems are requiring utility operators to seek other water treatment programs. Two case histories show how hydrocarbon processing industry facilities used a calcium carbonate inhibitor to reduce phosphate discharges, control corrosion and maintain heat-transfer efficiency on affected exchangers.

Geiger, G.E. [Betz Water Management Group, Horsham, PA (United States)

1996-01-01

399

Traveling Wave RF Systems for Helical Cooling Channels  

SciTech Connect

The great advantage of the helical ionization cooling channel (HCC) is its compact structure that enables the fast cooling of muon beam 6-dimensional phase space. This compact aspect requires a high average RF gradient, with few places that do not have cavities. Also, the muon beam is diffuse and requires an RF system with large transverse and longitudinal acceptance. A traveling wave system can address these requirements. First, the number of RF power coupling ports can be significantly reduced compared with our previous pillbox concept. Secondly, by adding a nose on the cell iris, the presence of thin metal foils traversed by the muons can possibly be avoided. We show simulations of the cooling performance of a traveling wave RF system in a HCC, including cavity geometries with inter-cell RF power couplers needed for power propagation.

Yonehara, K.; Lunin, A.; Moretti, A.; Popovic, M.; Romanov, G.; /Fermilab; Neubauer, M.; Johnson, R.P.; /Muons Inc., Batavia; Thorndahl, L.; /CERN

2009-05-01

400

Engineering evaluation of magma cooling-tower demonstration at Nevada Power Company's Sunrise Station. Final report  

SciTech Connect

The Magma Cooling Tower (MCT) process utilizes a falling film heat exchanger integrated into an induced draft cooling tower to evaporate wastewater. A hot water source such as return cooling water (90/sup 0/F to 110/sup 0/F) provides the energy for evaporation. Water quality control is maintained by removing potential scaling constituents to make concentration of the wastewater possible without scaling heat transfer surfaces. A pilot-scale demonstration test of the MCT process was performed from March 1979 through June 1979 at Nevada Power Company's Sunrise Station in Las Vegas, Nevada. The pilot unit extracted heat from the powerplant cooling system to evaporate cooling tower blowdown. Two water quality control methods were employed: makeup/sidestream softening and fluidized bed crystallization. The 11-week softening mode test was successful. The unit operated without biofouling or scaling at 100,000 ppM TDS levels under a wide range of operating conditions. Successful operation was not demonstrated in the 10-day crystallization mode test; calcium sulfate (CaSO/sub 4/) scaling occurred on the last day of the test at a maximum brine concentration of less than 40,000 ppM. An economic and technical comparison with other zero-discharge technologies showed that, for application at Sunrise, the MCT process had competitive capital, operating, and levelized annual costs. No major technical problems were encountered that would preclude the commercial application of a properly designed MCT unit operating in the softening mode.

Not Available

1980-11-01

401

Usability Engineering for Complex Interactive Systems Development  

Microsoft Academic Search

Usability engineering is a cost-effective, user- centered process that ensures a high level of effectiveness, efficiency, and safety in complex interactive systems. This paper presents a brief description of usability engineering activities, and discusses our experiences with leading usability engineering activities for three very different types of interactive applications: a responsive workbench-based command and control application called Dragon, a wearable

Joseph L. Gabbard; Deborah Hix; J. Edward Swan II; Mark A. Livingston; Tobias H. Hllerer; Simon J. Julier; Dennis Brown; Yohan Baillot

402

14 CFR 25.1165 - Engine ignition systems.  

Code of Federal Regulations, 2010 CFR

...simultaneous demands of the engine ignition system and the greatest demands... (c) The design of the engine ignition system must account for (1...engine ignition. (h) Each engine ignition system of a turbine powered...

2010-01-01

403

14 CFR 25.1165 - Engine ignition systems.  

Code of Federal Regulations, 2010 CFR

...simultaneous demands of the engine ignition system and the greatest demands... (c) The design of the engine ignition system must account for (1...engine ignition. (h) Each engine ignition system of a turbine powered...

2009-01-01

404

Design of solar heating and cooling systems. Final report  

Microsoft Academic Search

This report presents a method for making an energy and an economic cost\\/benefit analysis of solar energy systems. A graphical method is presented for evaluating the performance of solar domestic hot water systems, solar heating systems, and solar heating and cooling systems. Methods for selecting the optimum collector area based on benefit-to-cost ratio and for systemtically making detailed design calculations

D. M. Joncich; D. J. Leverenz; D. C. Hittle; G. N. Walton

1978-01-01

405

Tank waste remediation system systems engineering management plan  

Microsoft Academic Search

This Systems Engineering Management Plan (SEMP) describes the Tank Waste Remediation System (TWRS) implementation of the US Department of Energy (DOE) systems engineering policy provided in 97-IMSD-193. The SEMP defines the products, process, organization, and procedures used by the TWRS Project to implement the policy. The SEMP will be used as the basis for tailoring the systems engineering applications to

Peck

1998-01-01

406

A road map for implementing systems engineering  

SciTech Connect

Studies by academia, industry, and government indicate that applying a sound systems engineering process to development programs is an important tool for preventing cost and schedule overruns and performance deficiencies. There is an enormous body of systems engineering knowledge. Where does one start? How can the principles of systems engineering be applied in the Sandia environment? This road map is intended to be an aid to answering these questions.

Dean, F.F. [Sandia National Labs., Albuquerque, NM (United States). New Mexico Weapons Systems Engineering Center; Bentz, B.; Bahill, A.T. [Univ. of Arizona, Tucson, AZ (United States)

1997-02-01

407

Ice engineering complex adopts pump energy system. [Army Corps of Engineers Ice Engineering Facility, Hanover, NH  

Microsoft Academic Search

Heat pumps can recover waste heat and be used in ice engineering projects of the U.S. Army Corps of Engineers. An Ice Engineering facility in Hanover, New Hampshire will use heat pumps for such problems as ice jams, icing of hydroelectric inlets, canal locks and harbors, and general winter navigation. Other uses will include basement and office heating systems that

Aamot; H. W. C

1977-01-01

408

COOLING EFFECT ENHANCEMENT IN MAGNETRON SPUTTERING SYSTEM  

Microsoft Academic Search

Magnetron Sputtering system is a vacuum process used to deposit thin films on substrate for a wide variety of commercial and scientific purposes, such as making ultra- thin semiconductors, metal films, etc. It plays an important role in a coating system. In order to get the uniform deposition of material surface, high voltage and electric current are used in magnetron

Jae-Sang BAEK; Youn J. KIM

409

Tank waste remediation system engineering plan  

SciTech Connect

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

Rifaey, S.H.

1998-01-09

410

The integration of cryogenic cooling systems with superconducting electronic systems  

Microsoft Academic Search

The need for cryogenic cooling has been critical issue that has kept superconducting electronic devices from reaching the market place. Even though the performance of the superconducting circuit is superior to silicon electronics, the requirement for cryogenic cooling has put the superconducting devices at a disadvantage. This report will talk about the various methods for refrigerating superconducting devices. Cryocooler types

Michael A

2003-01-01

411

Surface cooled, vacuum impregnated superconducting magnet systems: Design, construction, applications  

NASA Astrophysics Data System (ADS)

The design and construction of three superconducting magnet systems for applications in the fields of medical imaging, plasma physics and nuclear physics are described. All three systems have vacuum impregnated, intrinsically stable coils with cooling at the outer surfaces of the winding package with liquid helium, and are all coupled in some way to closed cycle cooling systems. General theories are discussed. The techniques used in both the design and the construction of the different magnet systems, are given. The use of numerical methods for the calculation of thermal and mechanical properties of superconducting coil systems, is emphasized. The experimental results obtained with the Delft magnetic resonance imaging system are described and examples of images showing sagittal sections of the human head, successfully produced with this system, are given.

Dam, Jacobus Adrianus Maria; Pieterman, Karel

412

Three-Dimensional Morphology of Systems Engineering  

Microsoft Academic Search

A study of the structure and form of systems engineering using the technique of morphological analysis is presented. The result is a model of the field of systems engineering that may be rich in applications. Three uses given for illustration are in taxonomy, discovery of new sets of activities, and systems science curriculum design.

Arthur Hall

1969-01-01

413

Understanding the Value of Systems Engineering  

Microsoft Academic Search

The practices of systems engineering are believed to have high value in the development of complex systems. Heuristic wisdom is that an increase in the quantity and quality of systems engineering (SE) can reduce project schedule while increasing product quality. This paper explores recent theoretical and statistical information concerning this heuristic value of SE. It explores the underlying theoretical relationships

Eric C. Honour

414

TARDEC Advanced Systems Engineering Capability (ASEC).  

National Technical Information Service (NTIS)

Systems Engineering (SE) is a knowledge-based process. Its success depends on timely, efficient and effective knowledge capture, sharing of that knowledge among a diverse set of system stakeholders, and formulation of the system trade space to enable deci...

P. Mendonza

2012-01-01

415

Experimental Study of Plasma Cooling and Laser Beam Interaction in Gas Filled ICF Engines  

NASA Astrophysics Data System (ADS)

ICF power plants, such as the LIFE scheme under development at LLNL, may employ a high-Z, target-chamber gas-fill to moderate the first-wall heat-pulse due to x-rays and energetic ions released during target detonation. This gas-fill is heated and ionized by this energy release. It must cool and recombine before the next shot (at nominally 70-ms intervals) to a temperature where the next target and laser pulse can propagate to chamber center with minimal degradation. While we expect rapid cooling to 2eV by radiation, our modeling of cooling below 2 eV has a high degree of uncertainty. We have developed a plasma source to study the cooling rates and laser propagation in high-Z gaseous plasmas. The source is a theta discharge configuration driven by a low-inductance, 5-kJ, 100-ns pulsed power system. This configuration delivers high peak power levels, has an electrode-less discharge, and has unobstructed axial access for diagnostics and beam propagation studies. Our diagnostics include Thompson scattering, time resolved spectroscopy, and plasma probes. We will report on the system design, operation, and initial results.

Rhodes, Mark; Kane, Jave; Loosmore, Gwendolen; Demuth, James; Latkowski, Jeffery

2010-11-01

416

Wind turbine generators having wind assisted cooling systems and cooling methods  

DOEpatents

A wind generator includes: a nacelle; a hub carried by the nacelle and including at least a pair of wind turbine blades; and an electricity producing generator including a stator and a rotor carried by the nacelle. The rotor is connected to the hub and rotatable in response to wind acting on the blades to rotate the rotor relative to the stator to generate electricity. A cooling system is carried by the nacelle and includes at least one ambient air inlet port opening through a surface of the nacelle downstream of the hub and blades, and a duct for flowing air from the inlet port in a generally upstream direction toward the hub and in cooling relation to the stator.

Bagepalli, Bharat (Niskayuna, NY); Barnes, Gary R. (Delanson, NY); Gadre, Aniruddha D. (Rexford, NY); Jansen, Patrick L. (Scotia, NY); Bouchard, Jr., Charles G. (Schenectady, NY); Jarczynski, Emil D. (Scotia, NY); Garg, Jivtesh (Cambridge, MA)

2008-09-23

417

Systems Engineering Plan for Surface Navy Theater Air Defense (TAD)-Volume 1: System Requirements Engineering.  

National Technical Information Service (NTIS)

This plan for system requirements engineering defines the steps necessary to engineer Surface Navy Theater Air Defense (TAD) as a system. The high level architectures and requirements that result from this process are intended to guide future development ...

P. J. Stafford T. W. Kimbrell R. L. Kniceley D. L. Brunson R. G. Acree

1999-01-01

418

Earth Systems Science and Engineering  

SciTech Connect

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

Rotman, D A

2006-02-21

419

Simulation of an adsorption solar cooling system  

Microsoft Academic Search

A more realistic theoretical simulation model for a tubular solar adsorption refrigerating system using activated carbonmethanol (AC\\/M) pair has been introduced. The mathematical model represents the heat and mass transfer inside the adsorption bed, the condenser, and the evaporator. The simulation technique takes into account the variations of ambient temperature and solar radiation along the day. Furthermore, the local pressure,

H. Z. Hassan; A. A. Mohamad; R. Bennacer

2011-01-01

420

BETTER DUCT SYSTEMS FOR HOME HEATING AND COOLING.  

SciTech Connect

This is a series of six guides intended to provide a working knowledge of residential heating and cooling duct systems, an understanding of the major issues concerning efficiency, comfort, health, and safety, and practical tips on installation and repair of duct systems. These guides are intended for use by contractors, system designers, advanced technicians, and other HVAC professionals. The first two guides are also intended to be accessible to the general reader.

ANDREWS,J.

2001-01-01

421

Method and system for controlling an engine  

SciTech Connect

This patent describes method for controlling an engine provided with an auto-decelerator system in a construction vehicle the construction vehicle having plural operating levers, characterized in that the auto-decelerator system is automatically temporarily actuated immediately after all of the plural operating levers have been returned to their neutral positions, respectively, thereby causing a small extent reduction in the number of revolutions of the engine, and after allowing the engine to run under such a condition for a predetermined period, the auto-decelerator system is automatically actuated again to reduce the number of revolutions of the engine to those in the idling speed condition.

Sakaguchi, S.; Nagata, Y.

1988-10-04

422

Air conditioning system with supplemental ice storing and cooling capacity  

DOEpatents

The present air conditioning system with ice storing and cooling capacity can generate and store ice in its pipe assembly or in an ice storage tank particularly equipped for the system, depending on the type of the air conditioning system. The system is characterized in particular in that ice can be produced and stored in the air conditioning system whereby the time of supplying cooled air can be effectively extended with the merit that the operation cycle of the on and off of the compressor can be prolonged, extending the operation lifespan of the compressor in one aspect. In another aspect, ice production and storage in great amount can be performed in an off-peak period of the electrical power consumption and the stored ice can be utilized in the peak period of the power consumption so as to provide supplemental cooling capacity for the compressor of the air conditioning system whereby the shift of peak and off-peak power consumption can be effected with ease. The present air conditioning system can lower the installation expense for an ice-storing air conditioning system and can also be applied to an old conventional air conditioning system.

Weng, Kuo-Lianq (Taichung, TW); Weng, Kuo-Liang (Taichung, TW)

1998-01-01

423

Hydraulic Tests of Emergency Cooling System: L-Area.  

National Technical Information Service (NTIS)

The delay in L-Area startup provided an opportunity to obtain valuable data on the Emergency Cooling System (ECS) which will permit reactor operation at the highest safe power level. ECS flow is a major input to the FLOOD code which calculates reactor ECS...

J. H. Hinton

1988-01-01

424

Geothermal Cooling Retrofit System. Third Quarter Report; Fourth Quarter Report.  

National Technical Information Service (NTIS)

Use of ground source air cooling is described. It was found that summer humidity in Oklahoma was too high for good performance of the system. Modifications to the house and addition of an air source heat pump to the ground tubes were discussed. (ERA citat...

B. R. Farrar

1982-01-01

425

Solar Heating and Cooling of Residential Buildings: Design of Systems.  

ERIC Educational Resources Information Center

|This is the second of two training courses designed to develop the capability of practitioners in the home building industry to design solar heating and cooling systems. The course is organized in 23 modules to separate selected topics and to facilitate learning. Although a compact schedule of one week is shown, a variety of formats can be

Colorado State Univ., Ft. Collins. Solar Energy Applications Lab.

426

Simulation of a solar heating and cooling system  

Microsoft Academic Search

This paper presents thermal and economic analyses of a solar heated and air conditioned house in the Albuquerque climate. The system includes the following components: water heating collector, a water storage unit, a service hot water facility, a lithium bromide-water air conditioner (with cooling tower), an auxiliary energy source, and associated controls. The analysis of the thermal performance indicates the

L. W. Butz; W. A. Beckman; J. A. Duffie

1974-01-01

427

Efficient cooling system for IT equipment in a data center  

Microsoft Academic Search

The effects of the air-intake format of forced-air-cooled equipment on the efficiency of air conditioning systems are studied. A modern data center features a large number of information-processing devices to provide telecommunication services. These devices generate considerable heat, and the equipment that houses these devices often employs \\

Y. Furihata; H. Hayama; M. Enai; T. Mori

2003-01-01

428

Portable self-contained power and cooling system  

Microsoft Academic Search

A portable power and cooling system is described comprising: a drive unit including a combustion section, a scroll-type expander section, a scroll-type air compressor section, and a power output drive shaft, the expander and air compressor sections connected together for synchronousmovement via said power output drive shaft; said combustion section including a combustion air inlet and a combustion gas outlet,

1993-01-01

429

Special Hydraulic Tests of Emergency Cooling System, L-Area.  

National Technical Information Service (NTIS)

The delay in the L-Area startup provides an opportunity to obtain valuable data on the emergency cooling system (ECS). A series of special hydraulic tests of the ECS are proposed for L-Area. These tests are in addition to the test proposed by SRL. The tes...

G. F. Merz

1985-01-01

430

Cooling Off  

NSDL National Science Digital Library

In this activity, learners are introduced to challenges of maintaining temperatures while living in space. Thinking and acting like scientists and engineers, learners experiment to learn how to measure the specific heat capacity (or simply, specific heat) of water and then design an improved cooling system like those used in spacesuits. This lesson is developed using a 5E model of learning. In the ENGAGE section of the lesson, learners look at NASA technology and its relationship to improvements in athletic clothing and equipment. They learn about technology in spacesuit design and the use of this technology in everyday life. Working in teams, students conduct experiments relating to specific heat capacity on a cooling system they design in the EXPLORE and EXPLAIN sections. They are challenged to improve the cooling system in the EXTEND section of this lesson. Learners assess their understanding and abilities throughout the lesson and revisit the Essential Questions during the EVALUATE section.

Nasa

2012-08-06

431

A planning support system for system of systems engineering  

Microsoft Academic Search

This paper describes a planning system for SOSE (system of systems engineering). Based on the analysis of the characteristics of the planning for SOSE, the architecture framework of the planning system is introduced, which not only supports the process design and organization design, but also monitor of SOSE process. A plan representation is proposed for planning SOSE, which emphasizes on

Yong Wang; Zhong Liu; Wei-Ming Zhang; Jin-Cai Huang; Bao-Xin Xiu

2007-01-01

432

Gas-cooled reactor power systems for space  

NASA Astrophysics Data System (ADS)

Large amounts of electric power are required for some of the systems envisioned in support of SDI. Since various applications are being considered, and an overall power architecture study has not been completed, the required power levels and corresponding operating times for specific systems are not known. The characteristics of six designs for power levels of 2, 10 and 20 MWe for operating time of 1 and 7 yrs are described. The operating conditions for these arbitrary designs were chosen to minimize system specific mass. Both gas and liquid cooled reactors are considered. The designs discussed draw heavily on the Pluto project experience. Gas cooled thermal reactors coupled with Brayton cycle power conversion appear to provide reasonable multimegawatt space power systems. An advanced radiation design must be developed which can meet the mass limit assumed. The inherent high temperature capability of the reactors considered removes the reactor as a limiting condition on system performance.

Walter, Carl E.

433

Applying systems engineering to astronomical projects  

NASA Astrophysics Data System (ADS)

With the award of the VISTA project to the United Kingdom Astronomy Technology Centre (UK ATC), the need for a formal systems approach and dedicated systems engineering management was identified as a key requirement for the success of that project. The structuring of projects within the UK ATC has been increasingly biased toward a systems engineering approach. ROE projects such as CGS4, while very successful, were based on a traditional engineering discipline approach. The systems responsibility was split between the Project Scientist and the Project Manager. Such an approach can be made to work on internal projects where the entire team and project sponsor are in close proximity. As instrumentation projects have grown larger, become more complex and increasingly geographically distributed through international collaboration, the need for technical discipline enforced by a formal system engineering approach has correspondingly grown. Internal projects also benefit and are becoming increasingly reliant on systems engineering as a means to mitigating both schedule and budget risks. This paper describes and analyses the ongoing introduction of a formal systems approach within the UK ATC. Structuring of projects through a sub-system approach rather than by discipline, formal requirements capture, traceability and the use of systems tools to monitor performance are described. The introduction of systems engineering as a discipline is discussed and progress to date reported. Systems engineering activities in previous projects and ongoing implementation in current projects are analysed. Lessons learnt are described and future development in the systems approach outlined.

Craig, Simon C.; Born, Andrew J.

2004-09-01

434

Current cost and performance requirements for residential cool storage systems  

SciTech Connect

This study defines the current cost and performance requirements for residential cool storage technologies based on the characteristics of conventional air conditioning equipment and residential time-of-day (TOD) rate structures existing during the 1986--1987 time frame. Currently, rate structures are changing rapidly. Given the volatility of rate structures, the establishment of cost goal is challenging. The goals presented in this study are based on the utility rate structure as of 1986. This study serves to define residential cool storage cost and performance requirements in the current economic environment as well as the many issues affecting the requirements for residential cool storage systems both now and in the future. The same methodology can be employed to establish long-run goals once future rate structures are adequately defined. 12 refs., 6 figs., 18 tabs.

Brown, D.R.; Spanner, G.E.

1988-08-01

435

Developing, testing, evaluating and optimizing solar heating and cooling systems  

SciTech Connect

The objective is to develop and test various integrated solar heating, cooling and domestic hot water systems, and to evaluate their performance. Systems composed of new, as well a previously tested, components are carefully integrated so that effects of new components on system performance can be clearly delineated. The SEAL-DOE program includes six tasks which have received funding for the 1991--1992 fifteen-month period. These include: (1) a project employing isothermal operation of air and liquid solar space hearing systems, (2) a project to build and test several generic solar water heaters, (3) a project that will evaluate advanced solar domestic hot water components and concepts and integrate them into solar domestic hot water systems, (4) a liquid desiccant cooling system development project, (5) a project that will perform system modeling and analysis work on solid desiccant cooling systems research, and (6) a management task. The objectives and progress in each task are described in this report. 6 figs., 2 tabs.

Not Available

1991-11-01

436

The integration of cryogenic cooling systems with superconducting electronic systems  

SciTech Connect

The need for cryogenic cooling has been critical issue that has kept superconducting electronic devices from reaching the market place. Even though the performance of the superconducting circuit is superior to silicon electronics, the requirement for cryogenic cooling has put the superconducting devices at a disadvantage. This report will talk about the various methods for refrigerating superconducting devices. Cryocooler types will be compared for vibration, efficiency, and cost. Some solutions to specific problems of integrating cryocoolers to superconducting devices are presented.

Green, Michael A.

2003-07-01

437

Spent Nuclear Fuel project systems engineering management plan.  

National Technical Information Service (NTIS)

The purpose of the WHC Systems Engineering Management Plan (SEMP) is to describe the systems engineering approach and methods that will be integrated with established WHC engineering practices to enhance the WHC engineering management of the SNF Project. ...

J. C. Womack

1995-01-01

438

Automotive engines oil level surveillance system  

Microsoft Academic Search

This patent describes an engine crankcase oil surveillance system with restoration of oil sufficiency if needed, for use with an engine having a sump and an ignition system. It comprises: a vertical oil detection member extending down to and into the pump; timing means set for a specific period of time after initiation; timer initiation means for initiating the timing

M. C. Rasdal; V. J. Rasdal; M. C. Bates

1991-01-01

439

A nuclear power plant system engineering workstation  

Microsoft Academic Search

System engineers offer an approach to effective technical support for operation and maintenance of nuclear power plants. System engineer groups are being set up by most utilities in the United States; Institute of Nuclear Power Operations (INPO) and the US Nuclear Regulatory Commission (NRC) have endorsed the concept. The purpose of this paper is to describe a process for developing

J. H. Mason; J. W. Crosby

1989-01-01

440

Communications track for systems engineering majors  

Microsoft Academic Search

The Weapons and Systems Engineering Department at the United States Naval Academy offers an undergraduate degree in Systems Engineering (Controls) to approximately 100 midshipmen annually. Fourth year students are allowed to specialize by taking a two-course track chosen from several areas of interest. Our communications track is one of these areas. The communication track integrates signal analysis and processing methods,

Svetlana Avramov-Zamurovic; Carl Wick; Terry Dwan

1998-01-01

441

Integrated Systems Engineering and Test & Evaluation.  

National Technical Information Service (NTIS)

Presentation given at the AF Systems Engineering Conference, Dayton OH, 16-17 August 2011. Part of a breakout session chaired by Ms Eileen Bjorkman. Discussion links the systems engineering process used in a program to help manage risk levels with the tes...

P. Waters

2011-01-01

442

Engineering automation in interactive critical systems  

Microsoft Academic Search

This SIG focuses on the engineering of automation in interactive critical systems. Automation has already been studied in a number of (sub-) disciplines and application fields: design, human factors, psychology, (software) engineering, aviation, health care, games. One distinguishing feature of the area we are focusing on is that in the field of interactive critical systems properties such as reliability, dependability

Regina Bernhaupt; Guy A. Boy; Michael Feary; Philippe A. Palanque

2011-01-01

443

Hydraulic tests of emergency cooling system: L-Area  

SciTech Connect

The delay in L-Area startup provided an opportunity to obtain valuable data on the Emergency Cooling System (ECS) which will permit reactor operation at the highest safe power level. ECS flow is a major input to the FLOOD code which calculates reactor ECS power limits. The FLOOD code assesses the effectiveness of the ECS cooling capacity by modeling the core and plenum hydraulics under accident conditions. Presently, reactor power is not limited by the ECS cooling capacity (power limit). However, the manual calculations of ECS flows had been recently updated to include piping changes (debris strainer, valve changes, pressure release systems) and update fitting losses. Both updates resulted in reduced calculated ECS flows. Upon completion of the current program to update, validate, and document, reactor power may be limited under certain situations by ECS cooling capacity for some present reactor charge designs. A series of special hydraulic tests (Reference 1, 3) were conducted in L-Area using all sources of emergency coolant including the ECS pumps (Reference 2). The tests provided empirical hydraulic data on the ECS piping. These data will be used in computer models of the system as well as manual calculations of ECS flows. The improved modeling and accuracy of the flow calculations will permit reactor operation at the highest safe power level with respect to an ECS power limit.

Hinton, J H

1988-01-01

444

Diagnostics of vibrations in induction motor-pump system used for reactor core cooling system  

Microsoft Academic Search

Analysis and diagnostics of vibration in industrial systems play a significant rule to prevent severe damages. This paper proposes a non-linear model to simulate the torsional vibration in the reactor core cooling system. Simulation results of an operating reactor core cooling system set with the actual parameters are presented to validate the accuracy and reliability of the proposed analytical method.

S. A. Qutb; A. M. Abdel-Hamid; A. Mansour; S. E. Soliman

2006-01-01

445

Electrical Breakdown Characteristics of Superconducting Magnet System in Sub-Cooled Liquid Nitrogen  

Microsoft Academic Search

Dielectric characteristics of gaseous helium (GHe) injected into the cooling system to make sub-cooled nitrogen condition with constant pressure is found to be extraordinarily weak in dielectric strength by H. Mitsuii (1998). In high voltage superconducting machines using the sub-cooled nitrogen cooling system, the current lead part in GHe environment could be electrical weak points rather than the superconducting magnet

Hyoungku Kang; Chanjoo Lee; Tae Kuk Ko; Bok-Yeol Seok

2007-01-01

446

Accretion and Outflow from a Magnetized, Neutrino Cooled Torus around the Gamma-Ray Burst Central Engine  

NASA Astrophysics Data System (ADS)

We calculate the structure and short-term evolution of a gamma-ray burst (GRB) central engine in the form of a turbulent torus accreting onto a stellar mass black hole. Our models apply to the short GRB events, in which a remnant torus forms after the neutron star-black hole or a double neutron star merger and is subsequently accreted. We study the two-dimensional, relativistic models and concentrate on the effects of the black hole and flow parameters as well as the neutrino cooling. We compare the resulting structure and neutrino emission to the results of our previous one-dimensional simulations. We find that the neutrino cooled torus launches a powerful mass outflow, which contributes to the total neutrino luminosity and mass loss from the system. The neutrino luminosity may exceed the Blandford-Znajek luminosity of the polar jets and the subsequent annihilation of neutrino-antineutrino pairs will provide an additional source of power to the GRB emission.

Janiuk, Agnieszka; Mioduszewski, Patryk; Moscibrodzka, Monika

2013-10-01

447

The acoustics of racing engine intake systems  

NASA Astrophysics Data System (ADS)

Naturally aspirated racing engines have tuned intake systems and can now achieve volumetric efficiencies in excess of 125% and peak engine speeds in excess of 18,000rev/min. Engines designed for single seater racing commonly dispense with the intake manifold and its convoluted and restricting flow path preferring single lengths of pipe feeding each cylinder separately. An investigation into the intake process on a single cylinder racing engine has shown that inertial ram effects make a strong contribution to the intake process at high engine speeds whereas acoustic resonance effects are more important to the rather weak wave action that occurs at low engine speeds. An acoustic model of the resonant wave action has proved useful in distinguishing between these two effects. The attributes of the acoustic model have been compared to those of more traditional time-marching gas-dynamics calculation methods. A decoupled hybrid method has been shown to yield calculations of the wave dynamics in the intake system of a single cylinder racing engine that show fair agreement with measured results up to the 10th harmonic of the engine cycle frequency. In a case study, the intake characteristics of a single cylinder racing engine have been shown to differ only slightly from those expected from the V10 engine on which it is based, although this will only be the case when the dimensions of the intake system are chosen appropriately.

Harrison, M. F.; Dunkley, A.

2004-04-01

448

Systems Engineering for Large-Scale Fingerprint Systems  

Microsoft Academic Search

Systems engineering for large-scale Automated Fingerprint Recognition Systems (AFIS) involves system planning, specification,\\u000a design, development, testing, and operational support. Testing these systems includes the complex activity of measuring the\\u000a systems performance. The desired system performance, however, affects each of the systems engineering functions. For large-scale\\u000a systems, estimating the performance of the full-scale operational system and planning for its development are

Rajiv Khanna

449

Ramgen Power Systems for Military Engine Applications.  

National Technical Information Service (NTIS)

Ramgen Power Systems, Inc. (RPS) is developing two high efficiency gas turbine engine concepts that combine many of the proven features of supersonic compression and expansion systems, commonly used in supersonic flight inlet and nozzle designs, with conv...

C. W. Sohn D. Brown D. Mahoney F. H. Holcomb G. Tamm

2007-01-01

450

Correcting Aberrations in Complex Magnet Systems for Muon Cooling Channels  

SciTech Connect

Designing and simulating complex magnet systems needed for cooling channels in both neutrino factories and muon colliders requires innovative techniques to correct for both chromatic and spherical aberrations. Optimizing complex systems, such as helical magnets for example, is also difficult but essential. By using COSY INFINITY, a differential algebra based code, the transfer and aberration maps can be examined to discover what critical terms have the greatest influence on these aberrations.

J.A. Maloney, B. Erdelyi, A. Afanaciev, R.P. Johnson, Y.S. Derbenev, V.S. Morozov

2011-03-01

451

Compact liquid cooling system for small, moveable electronic equipment  

Microsoft Academic Search

The evaluation of a compact liquid cooling system is provided as a benchmark of self-contained heat exchanger units that can be used in small movable electronic equipment. The sealed system contains a fluid expansion chamber, a liquid-to-air heat exchanger core, a fan, and a pump that connects to a multichip module (MCM) package through a pair of flexible stainless steel

T. Y. Tom Lee; James A. Andrews; Peter Chow; David Saums

1992-01-01

452

Comparison of waste heat driven and electrically driven cooling systems for a high ambient temperature, off-grid application  

NASA Astrophysics Data System (ADS)

Forward army bases in off-grid locations with high temperatures require power and cooling capacity. Each gallon of fuel providing electrical power passes through a complex network, introducing issues of safety and reliability if this network is interrupted. Instead of using an engine and an electrically powered cooling system, a more efficient combined heat and power (CHP) configuration with a smaller engine and LiBr/Water absorption system (AS) powered by waste heat could be used. These two configurations were simulated in both steady state and transient conditions, in ambient temperatures up to 52C, providing up to 3 kW of non-cooling electricity, and 5.3 kW of cooling. Unlike conventional AS's which crystallize at high temperatures and use bulky cooling towers, the proposed AS's avoid crystallization and have air-cooled HXs for portability. For the hottest transient week, the results showed fuel savings of 3437%, weight reduction of 1119%, and a volumetric footprint 310% smaller.

Horvath, Christopher P.

453

Analysis of advanced solar hybrid desiccant cooling systems for buildings  

SciTech Connect

This report describes an assessment of the energy savings possible from developing hybrid desiccant/vapor-compression air conditioning systems. Recent advances in dehumidifier design for solar desiccant cooling systems have resulted in a dehumidifier with a low pressure drop and high efficiency in heat and mass transfer. A recent study on hybrid desiccant/vapor compression systems showed a 30%-80% savings in resource energy when compared with the best conventional systems with vapor compression. A system consisting of a dehumidifier with vapor compression subsystems in series was found to be the simplest and best overall performer.

Schlepp, D.; Schultz, K.

1984-10-01

454

77 FR 36014 - Initial Test Program of Emergency Core Cooling Systems for Boiling-Water Reactors  

Federal Register 2010, 2011, 2012, 2013

...Cooling Systems for Boiling-Water Reactors AGENCY: Nuclear Regulatory Commission...Cooling Systems for Boiling- Water Reactors.'' This guide describes methods...systems (ECCSs) for boiling-water reactors (BWRs). DATES: Submit...

2012-06-15

455

Simulation and analysis of district-heating and -cooling systems  

SciTech Connect

A computer simulation model, GEOCITY, was developed to study the design and economics of district heating and cooling systems. GEOCITY calculates the cost of district heating based on climate, population, energy source, and financing conditions. The principal input variables are minimum temperature, heating degree-days, population size and density, energy supply temperature and distance from load center, and the interest rate. For district cooling, maximum temperature and cooling degree-hours are required. From this input data the model designs the fluid transport and district heating systems. From this design, GEOCITY calculates the capital and operating costs for the entire system. GEOCITY was originally developed to simulate geothermal district heating systems and thus, in addition to the fluid transport and distribution models, it includes a reservoir model to simulate the production of geothermal energy from geothermal reservoirs. The reservoir model can be adapted to simulate the supply of hot water from any other energy source. GEOCITY has been used extensively and has been validated against other design and cost studies. GEOCITY designs the fluid transport and distribution facilities and then calculates the capital and operating costs for the entire system. GEOCITY can simulate nearly any financial and tax structure through varying the rates of return on equity and debt, the debt-equity ratios, and tax rates. Both private and municipal utility systems can be simulated.

Bloomster, C.H.; Fassbender, L.L.

1983-03-01

456

14 CFR 23.1111 - Turbine engine bleed air system.  

Code of Federal Regulations, 2013 CFR

... 2013-01-01 2013-01-01 false Turbine engine bleed air system. 23.1111 Section...Powerplant Induction System § 23.1111 Turbine engine bleed air system. For turbine engine bleed air systems, the following...

2013-01-01

457

Hybrid vehicle system studies and optimized hydrogen engine design  

SciTech Connect

We have done system studies of series hydrogen hybrid automobiles that approach the PNGV design goal of 34 km/liter (80 mpg), for 384 km (240 mi) and 608 km (380 mi) ranges. Our results indicate that such a vehicle appears feasible using an optimized hydrogen engine. We have evaluated the impact of various on-board storage options on fuel economy. Experiments in an available engine at the Sandia CRF demonstrated NO{sub x} emissions of 10 to 20 ppM at an equivalence ratio of 0.4, rising to about 500 ppm at 0.5 equivalence ratio using neat hydrogen. Hybrid simulation studies indicate that exhaust NO{sub x} concentrations must be less than 180 ppM to meet the 0.2 g/mile ULEV or Federal Tier II emissions regulations. LLNL has designed and fabricated a first generation optimized hydrogen engine head for use on an existing Onan engine. This head features 15:1 compression ratio, dual ignition, water cooling, two valves and open quiescent combustion chamber to minimize heat transfer losses. Initial testing shows promise of achieving an indicated efficiency of nearly 50% and emissions of less than 100 ppM NO{sub x}. Hydrocarbons and CO are to be measured, but are expected to be very low since their only source is engine lubricating oil. A successful friction reduction program on the Onan engine should result in a brake thermal efficiency of about 42% compared to today`s gasoline engines of 32%. Based on system studies requirements, the next generation engine will be about 2 liter displacement and is projected to achieve 46% brake thermal efficiency with outputs of 15 kW for cruise and 40 kW for hill climb.

Smith, J.R.; Aceves, S.

1995-04-26

458

Visualizing systems engineering data with Java  

SciTech Connect

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

Barter, R; Vinzant, A

1998-11-10

459

Electron cooling system for ITEP ion storage ring  

NASA Astrophysics Data System (ADS)

The main goal of the Tera Watt A Cumulator project (Institute for Theoretical and Experimental Physics, Moscow) is accumulation in the storage ring of an intense ion beam, its longitudinal compression and the use of the extracted beam for plasma experiments. However, beam parameters at the target are decreased because of extreme transverse heating and growth of the beam momentum spread due to intrabeam scattering. These effects can be suppressed by application of the electron cooling system (ECS). Design study of ECS has been performed in the Joint Institute for Nuclear Research. The design project and characteristics of the system are described, as well as analysis of the accumulation kinetics in the presence of the cooling system. Design work has shown that because of the small length of the straight section (2.35 m), the effective length of the cooling system is small (about 55 60 cm). Nevertheless, for long accumulation times (>100 s), the system allows us to significantly improve the beam parameters at the target (specific energy, specific power, and so on) and to suppress the beam losses by an order of magnitude.

Zenkevich, P. R.; Alexeev, N. N.; Barkhudaryan, A. V.; Bolshakov, A. Ye.; Koshkarev, D. G.; Sharkov, Yu. V.; Bykovsky, V. F.; Korotaev, Yu. V.; Meshkov, I. N.; Sidorin, A. O.; Smirnov, A. V.; Syresin, Ye. M.; Titkova, I. V.

2002-07-01

460

Tank waste remediation system systems engineering management plan  

Microsoft Academic Search

This Systems Engineering Management Plan (SEMP) describes the Tank Waste Remediation Systems (TWRS) implementation of U.S. Department of Energy (DOE) Systems Engineering (SE) policy provided in Tank Waste Remediation System Systems Engineering Management Policy, DOE\\/RL letter, 95-RTI-107, Oct. 31, 1995. This SEMP defines the products, process, organization, and procedures used by the TWRS Program to accomplish SE objectives. This TWRS

Peck

1996-01-01

461

A Biomass Gas Engine System for Power Generation of OTOP Building in Southern Thailand  

Microsoft Academic Search

The main purpose of this paper is to present a biomass gas engine system for power generation of OTOP building in southern Thailand. It consists of an electrical steam generator, an Imbert-type fixed bed downdraft gasifier of 1 m3 capacity, a cyclone, a water scrubber, a gas cooling system and a packed bed filter, a gas engine of 1,425 cc

J. Waewsak; M. Mani; P. Buaphet; P. Panichayunon

2007-01-01

462

Solar cooling system performance, Frenchman's Reef Hotel, Virgin Islands  

NASA Astrophysics Data System (ADS)

The operational and thermal performance of a variety of solar systems are described. The Solar Cooling System was installed in a hotel at St. Thomas, U. S. Virgin Islands. The system consists of the evacuated glass tube collectors, two 2500 gallon tanks, pumps, computerized controller, a large solar optimized industrial sized lithium bromide absorption chiller, and associated plumbing. Solar heated water is pumped through the system to the designed public areas such as lobby, lounges, restaurant and hallways. Auxiliary heat is provided by steam and a heat exchanger to supplement the solar heat.

Harber, H.

1981-09-01

463

Inlet Fogging of Gas Turbine Engines Detailed Climatic Analysis of Gas Turbine Evaporation Cooling Potential in the USA  

Microsoft Academic Search

Inlet fogging of gas turbine engines has attained considerable popularity due to the ease of installation and the relatively low first cost compared to other inlet cooling methods. With increasing demand for power and with shortages envisioned especially during the peak load times during the summers, there is a need to boost gas turbine power. There is a sizable evaporative

Mustapha Chaker; Cyrus B. Meher-Homji; Thomas Mee III; Alex Nicholson

2003-01-01

464

ON THE POSSIBILITY OF USING ALUMINUM ALLOY WATER COOLED CYLINDER HEAD IN I. C. ENGINES BY USING FINNED SURFACES  

Microsoft Academic Search

An experimental investigation has been carried out to examine the heat transfer by convection and incipient boiling from an aluminum alloy water cooled engine cylinder head using steady state technique. A flat and finned aluminum alloy specimens have been used in the present work. The operating parameters studied included the effect of flow velocity, coolant bulk temperature, and fin length.

S. M. S. Elfeky; M. Y. E. Selim

465

Specific impulse losses due to friction and dispersion in a gas-film cooled liquid rocket engine nozzle  

Microsoft Academic Search

Conclusions The proposed method and program for calculating the compressible turbulent boundary layer in rocket engine nozzles with gas film cooling make it possible to determine the specific impulse losses due to friction, the heat fluxes and other characteristics of the flow. The calculations are based on the numerical solution of the equations of gas dynamics in the boundary layer

V. G. Lushchik; V. I. Sizov; L. E. Sternin; A. E. Yakubenko

1993-01-01

466

A two-phase cooling system for the Jetfoil Visual Augmentation System  

NASA Astrophysics Data System (ADS)

The two-phase 'thermosiphon' principle is employed by a novel cooling system developed for temperature control of the IR-illumination and camera night Visual Augmentation System (VAS) used by a commercial hydrofoil craft. Performance comparisons are conducted between the two-phase and current, pumped loop VAS cooling systems, after the construction and testing of a full scale thermosiphon device. The new system is found to raise temperatures slightly, but eliminates a significant portion of the current system's operating noise and reduces cooling system weight by 67 percent.

Hamasaki, R. H.; Abe, J. L.; Franklin, J. L.

1983-07-01

467

A study on energy saving of cooling\\/reheating system using compact heat exchanger  

Microsoft Academic Search

When circulated air passes through the cooling coil in an air-conditioning system, the air is over-cooled to eliminate the\\u000a moisture and decrease the temperature. The cooled air is then reheated to recover the temperature. The purpose of the present\\u000a study was to evaluate the performance of a cooling\\/reheating system with regard to both cooling and reheating energy savings\\u000a affected by

Seong-Yeon Yoo; Jin-Hyuck Kim; Myoung-Seok Jie

2010-01-01

468

APPLICATION OF CONTROLLABLE ELECTRIC COOLANT PUMP FOR FUEL ECONOMY AND COOLING PERFORMANCE IMPROVEMENT  

Microsoft Academic Search

The engine cooling system for a typical class 3 pickup truck with a medium duty diesel engine was modeled with a commercial code, GT-Cool in order to explore the benefit of controllable electric pump on the cooling performance and the fuel economy. As the first step, the cooling system model with a conventional mechanical coolant pump was validated with experimental

Hoon Cho; Dohoy Jung; N. Assani; John Vander

2004-01-01

469

Impact of ambient pressure on performance of desiccant cooling systems  

SciTech Connect

The impact of ambient pressure on the performance of the ventilation cycle desiccant cooling system and its components was studied using computer simulations. The impact of ambient pressure depended on whether the system was designed for fixed-mass flow rate or fixed-volume flow rate operation. As ambient pressure decreased from 1.0 to 0.8 atm, the system thermal coefficient of performance increased by 8% for both fixed-mass and fixed-volume flow rate, the cooling capacity of the system (in kW) was decreased by 14% for the fixed-volume flow rate system and increased by 7% for the fixed-mass flow rate system, the electric power requirements for the system with fixed-volume flow rate did not change, and the electric power requirement for the fixed-mass flow rate system increased by 44%. The overall coefficient of performance increased up to 5% for the fixed-volume flow rate systems, and decreased up to 4% for the fixed-mass flow rate system. 16 refs.

Pesaran, A.A.

1991-12-01

470

Thermal Stress Calculations for Heatpipe-Cooled Reactor Power Systems  

NASA Astrophysics Data System (ADS)

A heatpipe-cooled fast reactor concept has been under development at Los Alamos National Laboratory for the past several years, to be used as a power source for nuclear electric propulsion (NEP) or as a planetary surface power system. The reactor core consists of an array of modules that are held together by a core lateral restraint system. Each module includes a single heatpipe surrounded by 3-6 clad fuel pins. As part of this development effort, a partial array of a candidate heatpipe-cooled reactor is to be tested in the SAFE-100 experimental program at the Marshall Space Flight Center. The partial array comprises 19 3-pin modules, which are powered by resistance heaters. This paper describes the analyses that were performed in support of this test program, to assess thermal and structural performance and to specify the test conditions needed to simulate reactor operating conditions.

Kapernick, Richard J.; Guffee, Ray M.

2003-01-01

471

Cooling atom-cavity systems into entangled states  

SciTech Connect

Generating entanglement by simply cooling a system into a stationary state which is highly entangled has many advantages. Schemes based on this idea are robust against parameter fluctuations, tolerate relatively large spontaneous decay rates, and achieve high fidelities independent of their initial state. A possible implementation of this idea in atom-cavity systems has recently been proposed by Kastoryano et al., [Kastoryano et al., Phys. Rev. Lett. 106, 090502 (2011).]. Here we propose an improved entanglement cooling scheme for two atoms inside an optical cavity which achieves higher fidelities for comparable single-atom cooperativity parameters C. For example, we predict fidelities above 90% even for C as low as 20 without having to detect photons.

Busch, J.; De, S.; Spiller, T. P.; Beige, A. [School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT (United Kingdom); Ivanov, S. S.; Torosov, B. T. [School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT (United Kingdom); Department of Physics, Sofia University, James Bourchier 5 Boulevard, 1164 Sofia (Bulgaria)

2011-08-15

472

Floating Loop System For Cooling Integrated Motors And Inverters Using Hot Liquid Refrigerant  

DOEpatents

A floating loop vehicle component cooling and air-conditioning system having at least one compressor for compressing cool vapor refrigerant into hot vapor refrigerant; at least one condenser for condensing the hot vapor refrigerant into hot liquid refrigerant by exchanging heat with outdoor air; at least one floating loop component cooling device for evaporating the hot liquid refrigerant into hot vapor refrigerant; at least one expansion device for expanding the hot liquid refrigerant into cool liquid refrigerant; at least one air conditioning evaporator for evaporating the cool liquid refrigerant into cool vapor refrigerant by exchanging heat with indoor air; and piping for interconnecting components of the cooling and air conditioning system.

Hsu, John S [Oak Ridge, TN; Ayers, Curtis W [Kingston, TN; Coomer, Chester [Knoxville, TN; Marlino, Laura D [Oak Ridge, TN

2006-02-07

473

Feasibility Studies on Commercialized Fast Breeder Reactor System (2) Gas Cooled High Temperature FBR  

Microsoft Academic Search

Japan Nuclear Cycle Development Institute (JNC) and Electric Utilities have been conducting Feasibility Studies on Commercialized FBR Systems since July 1999 under the cooperation Agreement. In that studies the preliminary concepts of various types of fast breeder reactors such as sodium cooled, heavy metal cooled and gas cooled reactors etc. have been designed and evaluated. For the gas cooled reactors,

Yoshihiro Kiso; Jun Kobayashi; Masanori Kid; Masashi Nomura; Masakazu Ichimiya

474

Design of Cooling Channels of Preburners for Small Liquid Rocket Engines with Computational Flow and Heat Transfer Analysis  

NASA Astrophysics Data System (ADS)

A series of computational analyses was performed to predict the cooling process by the cooling channel of preburners used for kerosene-liquid oxygen staged combustion cycle rocket engines. As an oxygen-rich combustion occurs in the kerosene fueled preburner, it is of great importance to control the wall temperature so that it does not exceed the critical temperature. However, since the heat transfer is proportional to the speed of fluid running inside the channel, the high heat transfer leads to a trade-off of pressure loss. For this reason, it is necessary to establish a certain criteria between the pressure loss and the heat transfer or the wall surface temperature. The design factors of the cooling channel were determined by the computational research, and a test model was manufactured. The test model was used for the hot fire tests to prove the function of the cooling mechanism, among other purposes.

Moon, In-Sang; Lee, Seon-Mi; Moon, Il-Yoon; Yoo, Jae-Han; Lee, Soo-Yong

2011-09-01

475

Engine induction system and method  

SciTech Connect

The patent describes a method of inducting air into the intake of an internal combustion engine to reduce engine pumping losses, the engine having an intake plenum connected to a plurality of cylinders each having at least one primary and one secondary intake valve. It comprises the steps of: first, blocking the flow of air to the secondary valves; second, opening each primary intake valve one at a time and closing that valve prior to the opening of the primary intake valve of any other cylinder thereby precluding overlap between the openings of primary valves of different cylinders; and third, at heavier loads, unblocking the flow of air to the secondary valves to obtain greater air flow.

Clarke, J.R.; Wolfe, B.C.

1989-08-29

476

Effects of power-plant cooling systems on marine phytoplankton  

Microsoft Academic Search

The large quattities of marine phytoplankton passing through the cooling systems of two Southern California coastal power plants were found to be greatly reduced in numbers (41.7%) and in volume (33.7%). The biomass killed from June, 1972 to May, 1973 amounted to approximately 1,700 tons of organic carbon. Phytoplankton mortalities were most pronounced from October to December when intake waters

F. J.-P. Briand; F. J. P

1975-01-01

477

Incremental cooling load determination for passive direct gain heating systems  

SciTech Connect

This paper examines the applicability of the National Association of Home Builders (NAHB) full load compressor hour method for predicting the cooling load increase in a residence, attributable to direct gain passive heating systems. The NAHB method predictions are compared with the results of 200 hour-by-hour simulations using BLAST and the two methods show reasonable agreement. The degree of agreement and the limitations of the NAHB method are discussed.

Sullivan, P.W.; Mahone, D.; Fuller, W.; Gruber, J.; Kammerud, R.; Place, W.; Andersson, B.

1981-05-01

478

Peltier cooling system utilizing liquid heat exchanger combined with pump  

Microsoft Academic Search

Peltier cooling systems utilizing liquid heat transfer directly with thermoelectric modules are adopted in fridges for hotel-use, home-bar and so forth. This paper reports the development of a highly efficient, high capacity liquid heat exchanger in which a thermoelectric module is installed to minimize electric power consumption and reduce cost. In the heat exchanger, a highly efficient 62-mm diameter round

H. Nishihata; O. Kido; T. Ueno

2002-01-01

479

A systems engineering primer for every engineer and scientist  

SciTech Connect

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

Edwards, William R.

2001-12-10

480

Solar heating and cooling system installed at Columbus, Ohio  

NASA Astrophysics Data System (ADS)

The Solar Energy System was installed as a part of a new construction of a college building. The building will house classrooms and laboratories, administrative offices and three lecture halls. The Solar Energy System consists of 4,096 square feet (128 panels) Owens/Illinois Evacuated Glass Tube Collector Subsystem, and a 5,000 gallon steel tank below ground storage system. Hot water is circulated between the collectors and storage tank, passing through a water/lithium bromide absorption chiller to cool the building.

1980-09-01