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Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

DOE/EIA-0304 Survey of Large Combustors:  

U.S. Energy Information Administration (EIA) Indexed Site

304 304 Survey of Large Combustors: Report on Alternative- Fuel Burning Capabilities of Large Boilers in 1979 U.S. Department of Energy Energy information Administration Office of Energy Markets and End Use Energy End Use Division Introduction During recent years, total annual industrial energy consumption in the United States has been approximated at 25 to 26 quadrillion British thermal units (Btu).^- Manufacturin g is by far the largest components totaling 12.9 quadrillion Btu of purchased fuels and electricity for heat and power during 1979.2 QJ this amount, 10.5 quadrillion Btu was accounted for by purchased fuels alone (e.g., fuel oil, coal, natural gas, etc.). Other than fuel consumption by type and industrial classificati on, very little information existed on specific fuel consumption characterist

2

Large-eddy simulation of multiphase flows in complex combustors  

E-Print Network [OSTI]

combustors and biomass gasifiers involv- ing swirling motions. The combustion chambers of propulsion systems of turbulent mixing and combustion dynamics. Our goal in the present work is to develop a computational tool combustion engines, liquid and solid propellant rocket motors, gas-turbine aircraft engines, cyclone

Mahesh, Krishnan

3

Assessment of combustion noise in a premixed swirled combustor via Large-Eddy Simulation  

E-Print Network [OSTI]

­5] as well as to more complex cases such as gas turbine combustors [6]. Computational techniques must be large enough to include the sources of noise as well as part of the acoustic near field [7 Acoustic analogy Direct computation Hybrid computation a b s t r a c t Today, much of the current effort

Nicoud, Franck

4

DOE/EIA-0304 Survey of Large Combustors:  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

was prepared in the Office of Energy Markets and End Use under the directorship of Wray Smith (252-8544). Overall direct report supervision was provided by Kenneth A. Vagts...

5

Thermal and Economic Analyses of Energy Saving by Enclosing Gas Turbine Combustor Section  

E-Print Network [OSTI]

) thermography inspection indicated a high-temperature area (500~560°F) at the combustor section of the GE Frame 5 gas turbine of Dynegy Gas Processing Plant at Venice, Louisiana. To improve the thermal efficiency and reduce energy cost, thermal... within the natural gas industry, the Venice plant is seeking various means to reduce cost. As part of the project to improve the energy efficiency of the plant and thus reduce energy costs, Dynegy contracted the Energy Conversion & Conservation...

Li, X.; Wang, T.; Day, B.

2006-01-01T23:59:59.000Z

6

Large-eddy simulation of evaporating spray in a coaxial combustor  

E-Print Network [OSTI]

on unstructured grids at conditions representative of gas-turbine combustors. Ã? 2009 The Combustion Institute of engineering applications; e.g., inter- nal combustion engines, liquid and solid propel- lant rocket motors, gas-turbine aircraft engines, cyclone combustors, and biomass gasifiers. The physics of such flows

Apte, Sourabh V.

7

Large-Eddy Simulation of Evaporating Spray in a Coaxial Combustor  

E-Print Network [OSTI]

of engineering applications; e.g. internal combustion engines, liquid and solid propellant rocket motors, gas-turbine representative of gas-turbine combustors. Key words: Sprays, LES, unstructured grids, particle-laden flows complex. In gas turbine combustors, for example, the liquid fuel jet undergoes primary and secondary

Mahesh, Krishnan

8

Large-eddy simulation of swirling particle-laden flows in a coaxial-jet combustor  

E-Print Network [OSTI]

combustion engines, liquid and solid propellant rocket motors, gas-turbine aircraft engines, International. In gas turbine combustors, for example, the liquid fuel jet undergoes primary and secondary atomization on structured grids and do not lend themselves applicable to the complex geometries of engineering gas-turbine

Apte, Sourabh V.

9

Assessment of combustion noise in a premixed swirled combustor via Large-eddy simulation  

E-Print Network [OSTI]

, 4, 5] as well as to more complex cases such as gas turbine combustors. [6] Corresponding author. Ph methods such as LES or DNS can directly provide the acoustic field radiated by noise sources. The sources are still calculated by DNS or LES codes whereas the radiated sound is evaluated by acoustic codes

Boyer, Edmond

10

Scramjet combustor  

SciTech Connect (OSTI)

This patent describes a scramjet combustor having a longitudinal axis and two spaced-apart, generally opposing, and generally longitudinally extending walls, with at least one of the walls having an aft-facing step. The combustor also having a fuel injector disposed proximate the step at an acute positive angle with respect to the longitudinal axis, and wherein the improvement comprises means for varying the fuel injector angle during supersonic flight.

Harshman, D.L.

1991-12-17T23:59:59.000Z

11

Scramjet combustor  

SciTech Connect (OSTI)

This patent describes an improvement in a scramjet combustor having a longitudinal axis and two spaced-apart, generally opposing, and generally longitudinally extending walls, with each of the walls having an aft-facing step, the steps being a longitudinal distance apart, the combustor also having a fuel injector disposed proximate a the step at an acute positive angle with respect to the longitudinal axis. The improvement comprises: means for varying the longitudinal distance during supersonic flight; means for varying the fuel injector angle during supersonic flight; and means for varying the transverse distance between the walls during supersonic flight.

Harshman, D.L.

1991-12-17T23:59:59.000Z

12

Massively-Parallel Spectral Element Large Eddy Simulation of a Ring-Type Gas Turbine Combustor  

E-Print Network [OSTI]

-Stokes . . . . . . . . . . . . . 28 D. NEK5000 . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 E. Geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 F. Mesh Generation . . . . . . . . . . . . . . . . . . . . . . . 36 III RESULTS AND DISCUSSION... in consumer vehicles and creating faster commercial jets. While discovering new energy resources in itself is an important concept, the rate of energy consumption, or power, is perhaps equally important. Power generation is what drives the modern world...

Camp, Joshua Lane

2012-07-16T23:59:59.000Z

13

Cogeneration using a thermionic combustor  

SciTech Connect (OSTI)

Thermionic energy conversion is well adapted to cogeneration with high temperature processes which require direct heating. Such processes are found in the metals, glass and petroleum industries. A case study has been made for applying thermionic energy converters to a walking beam steel slab reheat furnace. The objective is to replace the present burners with thermionic combustors which provide electricity while supplying direct heat at the same temperature and heat release conditions as the original burners. The combustor utilizes a thermionic converter design which has demonstrated stable output for long periods using a natural gas burner. Combustion air is used to cool the collectors. A computer program was formulated to facilitate the analysis of the thermionic combustor. The design of the thermionic combustor is described. The performance of the thermionic modules is calculated based on varying furnace production rates.

Miskolczy, G.; Lieb, D.

1982-08-01T23:59:59.000Z

14

CALIFORNIA ENERGY Large HVAC Energy Impact Report  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Large HVAC Energy Impact Report Statewide Energy Impact Report are part of the Integrated Design of Large Commercial HVAC Systems research project. The reports: Productivity and Interior Environments Integrated Design of Large Commercial HVAC Systems Integrated Design

15

Gas turbine combustor transition  

DOE Patents [OSTI]

A method is described for converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit. 7 figs.

Coslow, B.J.; Whidden, G.L.

1999-05-25T23:59:59.000Z

16

Large Scale Energy Storage  

Science Journals Connector (OSTI)

This work is mainly an experimental investigation on the storage of solar energy and/or the waste heat of a ... lake or a ground cavity. A model storage unit of (1×2×0.75)m3 size was designed and constructed. The...

F. Çömez; R. Oskay; A. ?. Üçer

1987-01-01T23:59:59.000Z

17

CALIFORNIA ENERGY Large HVAC Building  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Large HVAC Building Survey Information Database of Buildings over 100 Design of Large Commercial HVAC Systems research project, one of six research elements in the Integrated Design of Large Commercial HVAC Systems Integrated Design of Small Commercial HVAC Systems Integrated

18

Combustor liner cooling system  

DOE Patents [OSTI]

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

2013-08-06T23:59:59.000Z

19

Large Energy Users Program | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Large Energy Users Program Large Energy Users Program Large Energy Users Program < Back Eligibility Commercial Fed. Government Industrial Institutional Local Government Nonprofit Schools State Government Savings Category Heating & Cooling Commercial Heating & Cooling Heating Cooling Home Weatherization Construction Commercial Weatherization Design & Remodeling Manufacturing Other Appliances & Electronics Heat Pumps Commercial Lighting Lighting Water Heating Maximum Rebate Prescriptive: Varies by equipment type Custom: $200,000 or 30% per project Total Prescriptive and Custom combined: $400,000 per calendar year Program Info Funding Source Focus On Energy Start Date 04/01/2012 Expiration Date 12/31/2013 State Wisconsin Program Type State Rebate Program Rebate Amount Prescriptive: Varies by equipment type

20

Low NO.sub.x combustor  

DOE Patents [OSTI]

A combustor having an annular first stage, a generally cylindrically-shaped second stage, and an annular conduit communicably connecting the first and second stages. The conduit has a relatively small annular height and a large number of quench holes in the walls thereof such that quench air injected into the conduit through the quench holes will mix rapidly with, or quench, the combustion gases flowing through the conduit. The rapid quenching reduces the amount of NO.sub.x produced in the combustor.

Taylor, Jack R. (Cincinnati, OH)

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Gas turbine topping combustor  

DOE Patents [OSTI]

A combustor for burning a mixture of fuel and air in a rich combustion zone, in which the fuel bound nitrogen in converted to molecular nitrogen. The fuel rich combustion is followed by lean combustion. The products of combustion from the lean combustion are rapidly quenched so as to convert the fuel bound nitrogen to molecular nitrogen without forming NOx. The combustor has an air radial swirler that directs the air radially inward while swirling it in the circumferential direction and a radial fuel swirler that directs the fuel radially outward while swirling it in the same circumferential direction, thereby promoting vigorous mixing of the fuel and air. The air inlet has a variable flow area that is responsive to variations in the heating value of the fuel, which may be a coal-derived fuel gas. A diverging passage in the combustor in front of a bluff body causes the fuel/air mixture to recirculate with the rich combustion zone.

Beer, Janos (Winchester, MA); Dowdy, Thomas E. (Orlando, FL); Bachovchin, Dennis M. (Delmont, PA)

1997-01-01T23:59:59.000Z

22

Gas turbine topping combustor  

DOE Patents [OSTI]

A combustor is described for burning a mixture of fuel and air in a rich combustion zone, in which the fuel bound nitrogen in converted to molecular nitrogen. The fuel rich combustion is followed by lean combustion. The products of combustion from the lean combustion are rapidly quenched so as to convert the fuel bound nitrogen to molecular nitrogen without forming NOx. The combustor has an air radial swirler that directs the air radially inward while swirling it in the circumferential direction and a radial fuel swirler that directs the fuel radially outward while swirling it in the same circumferential direction, thereby promoting vigorous mixing of the fuel and air. The air inlet has a variable flow area that is responsive to variations in the heating value of the fuel, which may be a coal-derived fuel gas. A diverging passage in the combustor in front of a bluff body causes the fuel/air mixture to recirculate with the rich combustion zone. 14 figs.

Beer, J.; Dowdy, T.E.; Bachovchin, D.M.

1997-06-10T23:59:59.000Z

23

Ceramic combustor mounting  

DOE Patents [OSTI]

A combustor for a gas turbine engine includes a metal engine block including a wall portion defining a housing for a combustor having ceramic liner components. A ceramic outlet duct is supported by a compliant seal on the metal block and a reaction chamber liner is stacked thereon and partly closed at one end by a ceramic bypass swirl plate which is spring loaded by a plurality of circumferentially spaced, spring loaded guide rods and wherein each of the guide rods has one end thereof directed exteriorly of a metal cover plate on the engine block to react against externally located biasing springs cooled by ambient air and wherein the rod spring support arrangement maintains the stacked ceramic components together so that a normal force is maintained on the seal between the outlet duct and the engine block under all operating conditions. The support arrangement also is operative to accommodate a substantial difference in thermal expansion between the ceramic liner components of the combustor and the metal material of the engine block.

Hoffman, Melvin G. (Speedway, IN); Janneck, Frank W. (Danville, IN)

1982-01-01T23:59:59.000Z

24

Pulse Combustor Design, A DOE Assessment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Pulse Combustor Design Pulse Combustor Design A DOE Assessment DOE/NETL-2003/1190 July 2003 U.S. Department of Energy National Energy Technology Laboratory P.O. Box 880, 3610 Collins Ferry Road Morgantown, WV 26507-0880 P.O. Box 10940, 626 Cochrans Mill Road Pittsburgh, PA 15236-0940 West Third Street, Suite 1400 Tulsa, OK 74103-3519 website: www.netl.doe.gov 2 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or

25

Federal Energy Management Program: Large-scale Renewable Energy Projects  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Large-scale Large-scale Renewable Energy Projects (Larger than 10 MWs) to someone by E-mail Share Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Facebook Tweet about Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Twitter Bookmark Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Google Bookmark Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Delicious Rank Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Digg Find More places to share Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on

26

Catalytic Combustor for Fuel-Flexible Turbine  

SciTech Connect (OSTI)

Under the sponsorship of the U. S. Department of Energy’s National Energy Technology Laboratory, Siemens Westinghouse has conducted a three-year program to develop an ultra low NOx, fuel flexible catalytic combustor for gas turbine application in IGCC. The program is defined in three phases: Phase 1- Implementation Plan, Phase 2- Validation Testing and Phase 3 – Field Testing. Both Phase 1 and Phase 2 of the program have been completed. In IGCC power plants, the gas turbine must be capable of operating on syngas as a primary fuel and an available back-up fuel such as natural gas. In this program the Rich Catalytic Lean (RCLTM) technology is being developed as an ultra low NOx combustor. In this concept, ultra low NOx is achieved by stabilizing a lean premix combustion process by using a catalytic reactor to oxidize a portion of the fuel, increasing the temperature of fuel/air mixture prior to the main combustion zone. In Phase 1, the feasibility of the catalytic concept for syngas application has been evaluated and the key technology issues identified. In Phase II the technology necessary for the application of the catalytic concept to IGCC fuels was developed through detailed design and subscale testing. Phase III (currently not funded) will consist of full-scale combustor basket testing on natural gas and syngas.

Laster, W. R.; Anoshkina, E.

2008-01-31T23:59:59.000Z

27

Catalytic Combustor for Fuel-Flexible Turbine  

SciTech Connect (OSTI)

Under the sponsorship of the U.S. Department of Energy's National Energy Technology Laboratory, Siemens Westinghouse is conducting a three-year program to develop an ultra low NOx, fuel flexible catalytic combustor for gas turbine application in IGCC. The program is defined in three phases: Phase 1-Implementation Plan, Phase 2-Validation Testing and Phase 3-Field Testing. The Phase 1 program has been completed. Phase II was initiated in October 2004. In IGCC power plants, the gas turbine must be capable of operating on syngas as a primary fuel and an available back-up fuel such as natural gas. In this program the Rich Catalytic Lean (RCL{trademark}) technology is being developed as an ultra low NOx combustor. In this concept, ultra low NOx is achieved by stabilizing a lean premix combustion process by using a catalytic reactor to react part of the fuel, increasing the fuel/air mixture temperature. In Phase 1, the feasibility of the catalytic concept for syngas application has been evaluated and the key technology issues identified. In Phase II the catalytic concept will be demonstrated through subscale testing. Phase III will consist of full-scale combustor basket testing on natural gas and syngas.

W. R. Laster; E. Anoshkina; P. Szedlacsek

2006-03-31T23:59:59.000Z

28

Catalytic Combustor for Fuel-Flexible Turbine  

SciTech Connect (OSTI)

Under the sponsorship of the U. S. Department of Energy's National Energy Technology Laboratory, Siemens Westinghouse has conducted a three-year program to develop an ultra low NOx, fuel flexible catalytic combustor for gas turbine application in IGCC. The program is defined in three phases: Phase 1 - Implementation Plan, Phase 2 - Validation Testing and Phase 3 - Field Testing. Both Phase 1 and Phase 2 of the program have been completed. In IGCC power plants, the gas turbine must be capable of operating on syngas as a primary fuel and an available back-up fuel such as natural gas. In this program the Rich Catalytic Lean (RCLTM) technology is being developed as an ultra low NOx combustor. In this concept, ultra low NOx is achieved by stabilizing a lean premix combustion process by using a catalytic reactor to oxidize a portion of the fuel, increasing the temperature of fuel/air mixture prior to the main combustion zone. In Phase 1, the feasibility of the catalytic concept for syngas application has been evaluated and the key technology issues identified. In Phase II the technology necessary for the application of the catalytic concept to IGCC fuels was developed through detailed design and subscale testing. Phase III (currently not funded) will consist of full-scale combustor basket testing on natural gas and syngas.

W. R. Laster; E. Anoshkina

2008-01-31T23:59:59.000Z

29

Large-Scale Renewable Energy Guide  

Broader source: Energy.gov (indexed) [DOE]

Renewable Energy Guide Renewable Energy Guide Brad Gustafson, FEMP 2 Large-scale RE Guide Large-scale RE Guide: Developing Renewable Energy Projects Larger than 10 MWs at Federal Facilities Introduction and Overview Federal Utility Partnership Working Group May 22, 2013 Federal Energy Management Program Office of Energy Efficiency and Renewable Energy U.S. Department of Energy 3 Federal Energy Management Program FEMP works with key individuals to accomplish energy change within organizations by bringing expertise from all levels of project and policy implementation to enable Federal Agencies to meet energy related goals and to provide energy leadership to the country. 4 FEMP Renewable Energy * Works to increase the proportion of renewable energy in the Federal government's energy mix.

30

Wyoming's At-large congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Wyoming's At-large congressional district: Energy Resources Wyoming's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Wyoming. US Recovery Act Smart Grid Projects in Wyoming's At-large congressional district Cheyenne Light, Fuel and Power Company Smart Grid Project Powder River Energy Corporation Smart Grid Project Registered Energy Companies in Wyoming's At-large congressional district Blue Sky Batteries Inc Blue Sky Group Inc HTH Wind Energy Inc LappinTech LLC Nacel Energy Nanomaterials Discovery Corporation NDC Pathfinder Renewable Wind Energy PowerSHIFT Energy Company Inc TMA Global Wind Energy Systems TriLateral Energy LLC Utility Companies in Wyoming's At-large congressional district

31

Vermont's At-large congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Vermont's At-large congressional district: Energy Resources Vermont's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Vermont. Contents 1 US Recovery Act Smart Grid Projects in Vermont's At-large congressional district 2 Registered Policy Organizations in Vermont's At-large congressional district 3 Registered Energy Companies in Vermont's At-large congressional district 4 Energy Generation Facilities in Vermont's At-large congressional district US Recovery Act Smart Grid Projects in Vermont's At-large congressional district Vermont Transco, LLC Smart Grid Project Registered Policy Organizations in Vermont's At-large congressional district Clean Energy States Alliance

32

Probabilistic aerothermal design of gas turbine combustors  

E-Print Network [OSTI]

This thesis presents a probability-based framework for assessing the impact of manufacturing variability on combustor liner durability. Simplified models are used to link combustor liner life, liner temperature variability, ...

Bradshaw, Sean D. (Sean Darien), 1978-

2006-01-01T23:59:59.000Z

33

Alaska's At-large congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Alaska's At-large congressional district: Energy Resources Alaska's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Alaska. Registered Energy Companies in Alaska's At-large congressional district ABS Alaskan Inc Alaskan Wind Industries Four Dam Pool Power Agency FDPPA Kodiak Electric Association KEA Remote Power Inc. Sustina Energy Systems Wind Energy Alaska Energy Generation Facilities in Alaska's At-large congressional district Chena Hot Springs Geothermal Facility Utility Companies in Alaska's At-large congressional district Alaska Energy Authority Retrieved from "http://en.openei.org/w/index.php?title=Alaska%27s_At-large_congressional_district&oldid=174110"

34

Combined fluidized bed retort and combustor  

DOE Patents [OSTI]

The present invention is directed to a combined fluidized bed retorting and combustion system particularly useful for extracting energy values from oil shale. The oil-shale retort and combustor are disposed side-by-side and in registry with one another through passageways in a partition therebetween. The passageways in the partition are submerged below the top of the respective fluid beds to preclude admixing or the product gases from the two chambers. The solid oil shale or bed material is transported through the chambers by inclining or slanting the fluidizing medium distributor so that the solid bed material, when fluidized, moves in the direction of the downward slope of the distributor.

Shang, Jer-Yu (Fairfax, VA); Notestein, John E. (Morgantown, WV); Mei, Joseph S. (Morgantown, WV); Zeng, Li-Wen (Morgantown, WV)

1984-01-01T23:59:59.000Z

35

Pulse combustor with controllable oscillations  

DOE Patents [OSTI]

A pulse combustor having thermally induced pulse combustion in a continuously flowing system is described. The pulse combustor is fitted with at lease one elongated ceramic body which significantly increases the heat transfer area in the combustion chamber of the combustor. The ceramic body or bodies possess sufficient mass and heat capacity to ignite the fuel-air charge once the ceramic body or bodies are heated by conventional spark plug initiated combustion so as to provide repetitive ignition and combustion of sequentially introduced fuel-air charges without the assistance of the spark plug and the rapid quenching of the flame after each ignition in a controlled manner so as to provide a selective control over the oscillation frequency and amplitude. Additional control over the heat transfer in the combustion chamber is provided by employing heat exchange mechanisms for selectively heating or cooling the elongated ceramic body or bodies and/or the walls of the combustion chamber.

Richards, George A. (Morgantown, WV); Welter, Michael J. (Columbiana, OH); Morris, Gary J. (Morgantown, WV)

1992-01-01T23:59:59.000Z

36

Methanol tailgas combustor control method  

DOE Patents [OSTI]

A method for controlling the power and temperature and fuel source of a combustor in a fuel cell apparatus to supply heat to a fuel processor where the combustor has dual fuel inlet streams including a first fuel stream, and a second fuel stream of anode effluent from the fuel cell and reformate from the fuel processor. In all operating modes, an enthalpy balance is determined by regulating the amount of the first and/or second fuel streams and the quantity of the first air flow stream to support fuel processor power requirements.

Hart-Predmore, David J. (Rochester, NY); Pettit, William H. (Rochester, NY)

2002-01-01T23:59:59.000Z

37

Ultra-Low NOx Advanced Vortex Combustor  

SciTech Connect (OSTI)

An ultra lean-premixed Advanced Vortex Combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory (USDOE NETL) test facility in Morgantown (WV). All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx/CO/UHC emissions of 4/4/0 ppmv (all emissions are at 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated tremendous acoustic dynamic stability over a wide range of operating conditions which potentially makes this approach significantly more attractive than other lean premixed combustion approaches. In addition, a pressure drop of 1.75% was measured which is significantly lower than conventional gas turbine combustors. Potentially, this lower pressure drop characteristic of the AVC concept translates into overall gas turbine cycle efficiency improvements of up to one full percentage point. The relatively high velocities and low pressure drops achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

Edmonds, R.G. (Ramgen Power Systems, Inc., Bellevue, WA); Steele, R.C. (Ramgen Power Systems, Inc., Bellevue, WA); Williams, J.T. (Ramgen Power Systems, Inc., Bellevue, WA); Straub, D.L.; Casleton, K.H.; Bining, Avtar (California Energy Commission, Sacramento, CA)

2006-05-01T23:59:59.000Z

38

ULTRA-LOW NOX ADVANCED VORTEX COMBUSTOR  

SciTech Connect (OSTI)

An ultra lean-premixed Advanced Vortex Combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory (USDOE NETL) test facility in Morgantown (WV). All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx/CO/UHC emissions of 4/4/0 ppmv (all emissions are at 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated tremendous acoustic dynamic stability over a wide range of operating conditions which potentially makes this approach significantly more attractive than other lean premixed combustion approaches. In addition, a pressure drop of 1.75% was measured which is significantly lower than conventional gas turbine combustors. Potentially, this lower pressure drop characteristic of the AVC concept translates into overall gas turbine cycle efficiency improvements of up to one full percentage point. The relatively high velocities and low pressure drops achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

Ryan G. Edmonds; Robert C. Steele; Joseph T. Williams; Douglas L. Straub; Kent H. Casleton; Avtar Bining

2006-05-01T23:59:59.000Z

39

Montana's At-large congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Montana's At-large congressional district: Energy Resources Montana's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Montana. Registered Research Institutions in Montana's At-large congressional district Big Sky Carbon Sequestration Partnership Registered Policy Organizations in Montana's At-large congressional district National Center for Appropriate Technology Registered Energy Companies in Montana's At-large congressional district Bioroot Energy Business Excellence Consulting Confluence Communications Grasslands Renewable Energy LLC Montana Sustainable Building Systems REC Silicon formerly ASiMI Rivertop Renewables Saddlehorn Sage Resources Semitool Inc SolarMission Technologies Inc

40

Large Wind Technology | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Large Wind Technology Large Wind Technology Large Wind Technology The Wind Program works with industry partners to increase the performance and reliability of large wind technologies while lowering the cost of wind energy. The program's research efforts have helped to increase the average capacity factor (a measure of power plant productivity) from 22% for wind turbines installed before 1998 to 35% for turbines installed between 2004 and 2007. Wind energy costs have been reduced from over 55 cents (current dollars) per kilowatt-hour (kWh) in 1980 to under six cents/kWh today. To ensure future industry growth, the technology must continue to evolve, building on earlier successes to further improve reliability, increase capacity factors, and reduce costs. This page describes the goal of the

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Energy Characteristics and Energy Consumed in Large Hospital Buildings in  

Gasoline and Diesel Fuel Update (EIA)

Energy Characteristics and Energy Consumed in Large Hospital Buildings in Energy Characteristics and Energy Consumed in Large Hospital Buildings in the United States in 2007 Main Report | Methodology | FAQ | List of Tables CBECS 2007 - Release date: August 17, 2012 Hospitals consume large amounts of energy because of how they are run and the many people that use them. They are open 24 hours a day; thousands of employees, patients, and visitors occupy the buildings daily; and sophisticated heating, ventilation, and air conditioning (HVAC) systems control the temperatures and air flow. In addition, many energy intensive activities occur in these buildings: laundry, medical and lab equipment use, sterilization, computer and server use, food service, and refrigeration. The 2003 Commercial Building Energy Consumption Survey (CBECS) data showed

42

Low NO.sub.x multistage combustor  

DOE Patents [OSTI]

A high efficiency, Vortex Inertial Staged Air (VIStA) combustor provides ultra-low NO.sub.X production of about 20 ppmvd or less with CO emissions of less than 50 ppmvd, both at 3% O.sub.2. Prompt NO.sub.X production is reduced by partially reforming the fuel in a first combustion stage to CO and H.sub.2. This is achieved in the first stage by operating with a fuel rich mixture, and by recirculating partially oxidized combustion products, with control over stoichiometry, recirculation rate and residence time. Thermal NO.sub.X production is reduced in the first stage by reducing the occurrence of high temperature combustion gas regions. This is achieved by providing the first stage burner with a thoroughly pre-mixed fuel/oxidant composition, and by recirculating part of the combustion products to further mix the gases and provide a more uniform temperature in the first stage. In a second stage combustor thermal NO.sub.X production is controlled by inducing a large flow of flue gas recirculation in the second stage combustion zone to minimize the ultimate temperature of the flame. One or both of the first and second stage burners can be cooled to further reduce the combustion temperature and to improve the recirculation efficiency. Both of these factors tend to reduce production of NO.sub.X.

Becker, Frederick E. (Reading, MA); Breault, Ronald W. (Newington, NH); Litka, Anthony F. (Hanover, MA); McClaine, Andrew W. (Lexington, MA); Shukla, Kailash (Boxborough, MA)

2000-01-01T23:59:59.000Z

43

Delaware's At-large congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Delaware's At-large congressional district: Energy Resources Delaware's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Delaware. Registered Energy Companies in Delaware's At-large congressional district AstroPower Inc Building Media, Inc. (Du Pont) (Building America Retrofit Alliance) Butamax Advanced Biofuels LLC Citizenre Group Delmarva Power Light Company Delmarva Power DuPont DuPont Biofuels Dupont Fuel Cells Galt Power Inc GlobalWatt Inc Ion Power Inc Naveen Energy Hydra Energy LLC O2Diesel Corporation formerly Dynamic Ventures RNK Capital LLC Sentry Power LLC Sentry Power Technology Textronics Inc Tristabella Consulting LLC University of Delaware Registered Financial Organizations in Delaware's At-large congressional

44

Category:LargeHotel | Open Energy Information  

Open Energy Info (EERE)

LargeHotel LargeHotel Jump to: navigation, search Go Back to PV Economics By Building Type Media in category "LargeHotel" The following 77 files are in this category, out of 77 total. SVLargeHotel Bismarck ND Montana-Dakota Utilities Co (North Dakota).png SVLargeHotel Bismarck ... 70 KB SVLargeHotel International Falls MN Northern States Power Co (Minnesota) Excel Energy.png SVLargeHotel Internati... 85 KB SVLargeHotel LA CA City of Los Angeles California (Utility Company).png SVLargeHotel LA CA Cit... 88 KB SVLargeHotel Memphis TN City of Memphis Tennessee (Utility Company).png SVLargeHotel Memphis T... 67 KB SVLargeHotel Minneapolis MN Northern States Power Co (Minnesota) Excel Energy.png SVLargeHotel Minneapol... 85 KB SVLargeHotel Minot ND Montana-Dakota Utilities Co (North Dakota).png

45

Category:LargeOffice | Open Energy Information  

Open Energy Info (EERE)

LargeOffice LargeOffice Jump to: navigation, search Go Back to PV Economics By Building Type Media in category "LargeOffice" The following 77 files are in this category, out of 77 total. SVLargeOffice Bismarck ND Montana-Dakota Utilities Co (North Dakota).png SVLargeOffice Bismarck... 69 KB SVLargeOffice Cedar City UT Moon Lake Electric Assn Inc (Utah).png SVLargeOffice Cedar Ci... 57 KB SVLargeOffice International Falls MN Northern States Power Co (Minnesota) Excel Energy.png SVLargeOffice Internat... 83 KB SVLargeOffice LA CA City of Los Angeles California (Utility Company).png SVLargeOffice LA CA Ci... 92 KB SVLargeOffice Memphis TN City of Memphis Tennessee (Utility Company).png SVLargeOffice Memphis ... 70 KB SVLargeOffice Minneapolis MN Northern States Power Co (Minnesota) Excel Energy.png

46

Combustor with multistage internal vortices  

DOE Patents [OSTI]

A fluidized bed combustor is provided with a multistage arrangement of vortex generators in the freeboard area. The vortex generators are provided by nozzle means which extend into the interior of the freeboard for forming vortices within the freeboard area to enhance the combustion of particulate material entrained in product gases ascending into the freeboard from the fluidized bed. Each of the nozzles are radially inwardly spaced from the combustor walls defining the freeboard to provide for the formation of an essentially vortex-free, vertically extending annulus about the vortices whereby the particulate material centrifuged from the vortices against the inner walls of the combustor is returned through the annulus to the fluidized bed. By adjusting the vortex pattern within the freeboard, a significant portion of the full cross-sectional area of the freeboard except for the peripheral annulus can be contacted with the turbulent vortical flow for removing the particulate material from the gaseous products and also for enhancing the combustion thereof within the freeboard.

Shang, Jer Y. (4524 Andes Dr., Fairfax, VA 22030); Harrington, Richard E. (114 Beechwood St., Morgantown, WV 26505)

1989-01-01T23:59:59.000Z

47

Fuel-Flexible, Low-Emissions Catalytic Combustor for Opportunity...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Flexible, Low-Emissions Catalytic Combustor for Opportunity Fuels Fuel-Flexible, Low-Emissions Catalytic Combustor for Opportunity Fuels This fact sheet provides an overview of the...

48

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network [OSTI]

Magnetic Spectrometer, Dark Energy Survey, Palomar Transientform the basis for dark energy surveys. Unlike high-redshiftDark Energy Mission (JDEM) and the Large Synoptic Sky Survey (

Gerber, Richard A.

2011-01-01T23:59:59.000Z

49

5 - Combustors in gas turbine systems  

Science Journals Connector (OSTI)

Abstract: This chapter discusses combustion systems in gas turbines. It begins by reviewing basic design principles before discussing developments in technology such as advanced fuel staging and reheat combustion systems. The chapter also covers the impact of different natural gas types on combustor operations, including combustor design for low calorific gases and fuel oils.

P. Flohr; P. Stuttaford

2013-01-01T23:59:59.000Z

50

Combustor oscillation pressure stabilizer  

SciTech Connect (OSTI)

In accordance with the objective of the present invention, the active control of unsteady combustion induced oscillations in a combustion chamber fired by a suitable fuel and oxidizer mixture, such as a hydrocarbon fuel and air mixture, is provided by restructuring and moving the position of the main flame front and thereby increasing the transport time and displacing the pressure wave further away from the in-phase relationship with the periodic heat release. The restructuring and repositioning of the main flame are achieved by utilizing a pilot flame which is pulsed at a predetermined frequency corresponding to less than about one-half the frequency of the combustion oscillation frequency with the duration of each pulse being sufficient to produce adequate secondary thermal energy to restructure the main flame and thereby decouple the heat release from the acoustic coupling so as to lead to a reduction in the dynamic pressure amplitude. The pulsating pilot flame produces a relatively small and intermittently existing flame front in the combustion zone that is separate from the oscillating main flame front but which provides the thermal energy necessary to effectively reposition the location of the oscillating main flame front out of the region in the combustion zone where the acoustic coupling can occur with the main flame and thereby effectively altering the oscillation-causing phase relationship with the heat of combustion.

Gemmen, R.S.; Richards, G.A.; Yip, M.T.J.; Robey, E.; Cully, S.R.; Addis, R.E.

1996-12-31T23:59:59.000Z

51

TRW advanced slagging coal combustor utility demonstration  

SciTech Connect (OSTI)

The TRW Advanced Entrained Coal Combustor Demonstration Project consists of retrofitting Orange and Rockland (O R) Utility Corporation's Lovett Plant Unit No. 3 with four (4) slagging combustors which will allow the gas/oil unit to fire 2.5% sulfur coal. The slagging combustor process will provide NO{sub x} and SO{sub x} emissions that meet NSPS and New York State Environmental Standards. The TRW-Utility Demonstration Unit (UDU) is responsible for the implementation of program policies and overall direction of the project. The following projects will be carried out: process and design development of clean coal technology CCT-1 the development and operation of the entrained coal combustor will enable the boiler to burn low and medium sulfur coal while meeting all the Federal/State emission requirements; demonstrate sulfur dioxide emissions control by pulverized limestone injection into the entrained coal combustor system.

Not Available

1990-01-01T23:59:59.000Z

52

Combustor for fine particulate coal  

DOE Patents [OSTI]

A particulate coal combustor with two combustion chambers is provided. The first combustion chamber is toroidal; air and fuel are injected, mixed, circulated and partially combusted. The air to fuel ratio is controlled to avoid production of soot or nitrogen oxides. The mixture is then moved to a second combustion chamber by injection of additional air where combustion is completed and ash removed. Temperature in the second chamber is controlled by cooling and gas mixing. The clean stream of hot gas is then delivered to a prime mover. 4 figs.

Carlson, L.W.

1988-01-26T23:59:59.000Z

53

Combustor for fine particulate coal  

DOE Patents [OSTI]

A particulate coal combustor with two combustion chambers is provided. The first combustion chamber is toroidal; air and fuel are injected, mixed, circulated and partially combusted. The air to fuel ratio is controlled to avoid production of soot or nitrogen oxides. The mixture is then moved to a second combustion chamber by injection of additional air where combustion is completed and ash removed. Temperature in the second chamber is controlled by cooling and gas mixing. The clean stream of hot gas is then delivered to a prime mover.

Carlson, Larry W. (Oswego, IL)

1988-01-01T23:59:59.000Z

54

Wedge edge ceramic combustor tile  

DOE Patents [OSTI]

A multipiece combustor has a portion thereof being made of a plurality of ceramic segments. Each of the plurality of ceramic segments have an outer surface and an inner surface. Each of the plurality of ceramic segments have a generally cylindrical configuration and including a plurality of joints. The joints define joint portions, a first portion defining a surface being skewed to the outer surface and the inner surface. The joint portions have a second portion defining a surface being skewed to the outer surface and the inner surface. The joint portions further include a shoulder formed intermediate the first portion and the second portion. The joints provide a sealing interlocking joint between corresponding ones of the plurality of ceramic segments. Thus, the multipiece combustor having the plurality of ceramic segment with the plurality of joints reduces the physical size of the individual components and the degradation of the surface of the ceramic components in a tensile stress zone is generally eliminated reducing the possibility of catastrophic failures.

Shaffer, James E. (Maitland, FL); Holsapple, Allan C. (Poway, CA)

1997-01-01T23:59:59.000Z

55

Wedge edge ceramic combustor tile  

DOE Patents [OSTI]

A multipiece combustor has a portion thereof being made of a plurality of ceramic segments. Each of the plurality of ceramic segments have an outer surface and an inner surface. Each of the plurality of ceramic segments have a generally cylindrical configuration and including a plurality of joints. The joints define joint portions, a first portion defining a surface being skewed to the outer surface and the inner surface. The joint portions have a second portion defining a surface being skewed to the outer surface and the inner surface. The joint portions further include a shoulder formed intermediate the first portion and the second portion. The joints provide a sealing interlocking joint between corresponding ones of the plurality of ceramic segments. Thus, the multipiece combustor having the plurality of ceramic segment with the plurality of joints reduces the physical size of the individual components and the degradation of the surface of the ceramic components in a tensile stress zone is generally eliminated reducing the possibility of catastrophic failures. 7 figs.

Shaffer, J.E.; Holsapple, A.C.

1997-06-10T23:59:59.000Z

56

Energy Department Applauds Nation's First Large-Scale Industrial...  

Office of Environmental Management (EM)

Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage...

57

New gas turbine combustor supports emissions limits  

SciTech Connect (OSTI)

Gas Research Institute, in partnership with Allison Engine Co. of Indianapolis, has introduced a natural gas-fired, low-emissions combustor that it says will give customers of industrial gas turbines a least-cost approach for meeting US emissions regulations. The LE IV combustor uses dry, low-nitrogen oxides (DLN) technology to reduce emissions from the Allison 501K industrial gas turbine to 25 parts per million or less (corrected to 15 percent oxygen)--levels that are expected to meet pending federal emissions regulations. GRI is funding similar efforts with other manufacturers of turbines commonly used at pipeline compressor stations and industrial power generation sites. The Allison combustor features a dual operating mode. During the pilot mode of operation, fuel is directly injected into the combustor`s liner where it is consumed in a diffusion flame reaction. During higher power operation, the fuel and air are uniformly premixed in fuel-lean proportions to control NO{sub x} formation. In addition, optimum engine performance is maintained by the dry, lean-mixed combustion technology as it suppresses NO{sub x} formation in the turbine`s combustion section. An added advantage of the LE IV combustor is its ability to lower emissions without any adverse affect on engine performance and operations, according to GRI> The combustor is available as either a retrofit or as an option on a new engine.

NONE

1996-10-01T23:59:59.000Z

58

Fuel cell system with combustor-heated reformer  

DOE Patents [OSTI]

A fuel cell system including a fuel reformer heated by a catalytic combustor fired by anode effluent and/or fuel from a liquid fuel supply providing fuel for the fuel cell. The combustor includes a vaporizer section heated by the combustor exhaust gases for vaporizing the fuel before feeding it into the combustor. Cathode effluent is used as the principle oxidant for the combustor.

Pettit, William Henry (Rochester, NY)

2000-01-01T23:59:59.000Z

59

Development of Large Format Lithium Ion Cells with Higher Energy...  

Broader source: Energy.gov (indexed) [DOE]

Overall Project Goal: To research, develop and demonstrate large format lithium ion cells with energy density > 500 WhL Barriers addressed: - Low energy density - Cost -...

60

Combustor oscillating pressure stabilization and method  

DOE Patents [OSTI]

High dynamic pressure oscillations in hydrocarbon-fueled combustors typically occur when the transport time of the fuel to the flame front is at some fraction of the acoustic period. These oscillations are reduced to acceptably lower levels by restructuring or repositioning the flame front in the combustor to increase the transport time. A pilot flame front located upstream of the oscillating flame and pulsed at a selected frequency and duration effectively restructures and repositions the oscillating flame in the combustor to alter the oscillation-causing transport time.

Gemmen, Randall S. (Morgantown, WV); Richards, George A. (Morgantown, WV); Yip, Mui-Tong Joseph (Morgantown, WV); Robey, Edward H. (Westover, WV); Cully, Scott R. (Morgantown, WV); Addis, Richard E. (Smithfield, PA)

1998-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Locations of Smart Grid Demonstration and Large-Scale Energy...  

Broader source: Energy.gov (indexed) [DOE]

Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Map of the United States...

62

FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy...  

Energy Savers [EERE]

FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects August 21, 2013 - 12:00am...

63

Development of Large Format Lithium Ion Cells with Higher Energy...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Large Format Lithium Ion Cells with Higher Energy Density Exceeding 500WhL Development of Large Format Lithium Ion Cells with Higher Energy Density Exceeding 500WhL 2012 DOE...

64

Scramjet including integrated inlet and combustor  

SciTech Connect (OSTI)

This patent describes a scramjet engine. It comprises: a first surface including an aft facing step; a cowl including: a leading edge and a trailing edge; an upper surface and a lower surface extending between the leading edge and the trailing edge; the cowl upper surface being spaced from and generally parallel to the first surface to define an integrated inlet-combustor therebetween having an inlet for receiving and channeling into the inlet-combustor supersonic inlet airflow; means for injecting fuel into the inlet-combustor at the step for mixing with the supersonic inlet airflow for generating supersonic combustion gases; and further including a spaced pari of sidewalls extending between the first surface to the cowl upper surface and wherein the integrated inlet-combustor is generally rectangular and defined by the sidewall pair, the first surface and the cowl upper surface.

Kutschenreuter, P.H. Jr.; Blanton, J.C.

1992-02-04T23:59:59.000Z

65

Energy storage inherent in large tidal turbine farms  

Science Journals Connector (OSTI)

...Research articles 1006 154 139 140 Energy storage inherent in large tidal turbine...in channels have short-term energy storage. This storage lies in the inertia...channels. inertia|renewable energy|storage|tidal|current|power| 1...

2014-01-01T23:59:59.000Z

66

Rolling contact mounting arrangement for a ceramic combustor  

DOE Patents [OSTI]

A combustor assembly having a preestablished rate of thermal expansion is mounted within a gas turbine engine housing having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the combustor assembly. The combustor assembly is constructed of a inlet end portion, a outlet end portion and a plurality of combustor ring segments positioned between the end portions. A mounting assembly is positioned between the combustor assembly and the gas turbine engine housing to allow for the difference in the rate of thermal expansion while maintaining axially compressive force on the combustor assembly to maintain contact between the separate components. 3 figs.

Boyd, G.L.; Shaffer, J.E.

1995-10-17T23:59:59.000Z

67

Rolling contact mounting arrangement for a ceramic combustor  

DOE Patents [OSTI]

A combustor assembly having a preestablished rate of thermal expansion is mounted within a gas turbine engine housing having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the combustor assembly. The combustor assembly is constructed of a inlet end portion, a outlet end portion and a plurality of combustor ring segments positioned between the end portions. A mounting assembly is positioned between the combustor assembly and the gas turbine engine housing to allow for the difference in the rate of thermal expansion while maintaining axially compressive force on the combustor assembly to maintain contact between the separate components.

Boyd, Gary L. (328 Sneath Way, Alpine, CA 91901); Shaffer, James E. (1780 Geronimo Tr., Maitland, FL 32751)

1995-01-01T23:59:59.000Z

68

Large-eddy simulations of scramjet engines.  

E-Print Network [OSTI]

??The main objective of this dissertation is to develop large-eddy simulation (LES) based computational tools for supersonic inlet and combustor design. In the recent past,… (more)

Koo, Heeseok

2011-01-01T23:59:59.000Z

69

Lessons from Large-Scale Renewable Energy Integration Studies...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

including 10% post consumer waste. 1 WREF 2012: LESSONS FROM LARGE-SCALE RENEWABLE ENERGY INTEGRATION STUDIES A number of large-scale studies have been conducted in the...

70

Carderock Large Cavitation Tunnel | Open Energy Information  

Open Energy Info (EERE)

Large Cavitation Tunnel Large Cavitation Tunnel Jump to: navigation, search Basic Specifications Facility Name Carderock Large Cavitation Tunnel Overseeing Organization United States Naval Surface Warfare Center Hydrodynamic Testing Facility Type Tunnel Length(m) 13.1 Beam(m) 3.0 Depth(m) 3.0 Water Type Freshwater Cost(per day) Contact POC Special Physical Features The Large Cavitation Channel was designed as a variable pressure, recirculating, cavitation tunnel with a very low acoustic background level; test section pressure: 3.5-414 kPa (0.03 to 4 atmospheres, 0.5 to 60 psia); air content: 10% to 100% saturation Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Velocity(m/s) 18 Recirculating Yes Wind Capabilities

71

PSNH- Large Business Energy Efficiency Retrofit Rebate Program  

Broader source: Energy.gov [DOE]

Public Service of New Hampshire (PSNH), in collaboration with [http://www.nhsaves.com/ nhsaves], encourages large commercial and industrial customers in existing facilities to conserve energy...

72

Large Scale GSHP as Alternative Energy for American Farmers  

Broader source: Energy.gov (indexed) [DOE]

Large Scale GSHP as Alternative Energy for American Farmers Shawn Yunsheng Xu University of Missouri May 18, 2010 This presentation does not contain any proprietary confidential,...

73

Large Scale GSHP as Alternative Energy for American Farmers Geothermal...  

Open Energy Info (EERE)

Scale GSHP as Alternative Energy for American Farmers Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale GSHP as Alternative...

74

Large-Eddy Simulation for Green Energy and Propulsion Systems...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Large-Eddy Simulation for Green Energy and Propulsion Systems PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: General Electric Allocation Program: INCITE Allocation...

75

Combustion of syngas in a pressurized microturbine-like combustor: Experimental results  

Science Journals Connector (OSTI)

The different routes for power production from biomass often lead to an intermediary product such as a synthesis gas or syngas, which is typically rich in hydrogen and carbon monoxide. The simple design, fuel flexibility and size, which often matches the amount of waste energy available in industrial sites, makes microturbines an attractive solution for on-site, decentralized power generation using a limited range of alternative fuels such as synthetic gas. The properties of the synthetic fuel differ from properties of natural gas and a detailed experimental study with a separated microturbine-like pressurized combustor is therefore necessary. The present article reviews the experimental results obtained by gradually switching the fuel feed from natural gas to wet syngas in a pressurized, slightly modified lean premix microturbine combustor. Temperature profiles, pressure, emissions and flame imaging were closely monitored to detect possible problems in operability of the combustor caused by the strong difference in fuel characteristics. No problems regarding auto-ignition, dynamic or static instability were observed throughout the test-run. Temperature profiles stayed well within allowable limits and did not reveal any significant shift in flame anchoring position. The combustion of syngas during full or part load of the combustor produced remarkably low \\{NOx\\} and CO emissions. The microturbine combustor achieved stable full load combustion of syngas at the end of the test-run.

Frank Delattin; Giovanni Di Lorenzo; Sergio Rizzo; Svend Bram; Jacques De Ruyck

2010-01-01T23:59:59.000Z

76

Large Industrial Renewable Energy Purchase Program (New Brunswick) |  

Broader source: Energy.gov (indexed) [DOE]

Large Industrial Renewable Energy Purchase Program (New Brunswick) Large Industrial Renewable Energy Purchase Program (New Brunswick) Large Industrial Renewable Energy Purchase Program (New Brunswick) < Back Eligibility Agricultural Commercial Developer Industrial Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative Tribal Government Utility Savings Category Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State New Jersey Program Type Performance-Based Incentive Provider New Brunswick Energy and Mines Beginning January 1, 2012 the Large Industrial Renewable Energy Purchase Program allows NB Power to purchase renewable energy generated by its largest customers at a rate of $95/MWh. This renewable energy will count towards meeting the Province's renewable energy targets at a purchase

77

Penn Large Water Tunnel | Open Energy Information  

Open Energy Info (EERE)

Penn Large Water Tunnel Penn Large Water Tunnel Jump to: navigation, search Basic Specifications Facility Name Penn Large Water Tunnel Overseeing Organization Pennsylvania State University Hydrodynamics Hydrodynamic Testing Facility Type Tunnel Length(m) 4.3 Beam(m) 1.2 Depth(m) 1.2 Water Type Freshwater Cost(per day) Contact POC Special Physical Features Closed loop; Turbulence level = 0.1%; Pressure range = 3-60psi; Controlled cavitation = # >0.1; Control Air content = >1ppm per mole Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Velocity(m/s) 16.8 Recirculating Yes Pressure Range(Psi) 3 - 60 Wind Capabilities Wind Capabilities None Control and Data Acquisition Description National Instruments steady 24 bit

78

South Dakota's At-large congressional district: Energy Resources | Open  

Open Energy Info (EERE)

Dakota's At-large congressional district: Energy Resources Dakota's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in South Dakota. Contents 1 US Recovery Act Smart Grid Projects in South Dakota's At-large congressional district 2 Registered Research Institutions in South Dakota's At-large congressional district 3 Registered Policy Organizations in South Dakota's At-large congressional district 4 Registered Energy Companies in South Dakota's At-large congressional district 5 Utility Companies in South Dakota's At-large congressional district US Recovery Act Smart Grid Projects in South Dakota's At-large congressional district Black Hills Power, Inc. Smart Grid Project

79

Laser diagnostics on a hypersonic combustor  

SciTech Connect (OSTI)

NASA-Langley has implemented a laser-based multipoint/multiparameter diagnostics system at its hypersonic direct-connect combustor, in order to measure both temperature and majority species densities in two dimensions, using spatially-scanned CARS; in addition, line-imaged measurements of radical densities are simultaneously generated by LIF at any of several planes downstream of the fuel injector. Initial experimental trials have demonstrated successful detection of one-dimensional images of OH density, as well as CARS N2-temperature measurements, in the turbulent reaction zone of the hypersonic combustor.

Taylor, D.J.; Oldenborg, R.C.; Tiee, J.J.; Northam, G.B.; Antcliff, R.R.; Cutler, A.D.; Jarrett, O.; Smith, M.W. (Los Alamos National Laboratory, NM (USA) NASA, Langley Research Center, Hampton, VA (USA))

1991-01-01T23:59:59.000Z

80

Conte Large Flume | Open Energy Information  

Open Energy Info (EERE)

Conte Large Flume Conte Large Flume Overseeing Organization United States Geological Survey, LSC Hydrodynamic Testing Facility Type Flume Length(m) 38.1 Beam(m) 6.1 Depth(m) 5.2 Cost(per day) Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities None Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Recirculating No Wind Capabilities Wind Capabilities None Control and Data Acquisition Description National Instruments LabView and other data acquisition systems Number of channels 12 Bandwidth(kHz) 44 Cameras Yes Number of Color Cameras 5 Description of Camera Types Conventional underwater video, 4; high speed (1000 fps), 1 Available Sensors Displacement, Flow, Pressure Range(psi), Thermal, Turbulence, Velocity Data Generation Capability

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

CALIFORNIA ENERGY Large HVAC Field and Baseline Data  

E-Print Network [OSTI]

CALIFORNIA ENERGY COMMISSION Large HVAC Field and Baseline Data Field Data Collection: Site Survey of the Integrated Design of Large Commercial HVAC Systems research project. The reports are a result of funding Design of Large Commercial HVAC Systems Integrated Design of Small Commercial HVAC Systems Integrated

82

System and method for controlling a combustor assembly  

DOE Patents [OSTI]

A system and method for controlling a combustor assembly are disclosed. The system includes a combustor assembly. The combustor assembly includes a combustor and a fuel nozzle assembly. The combustor includes a casing. The fuel nozzle assembly is positioned at least partially within the casing and includes a fuel nozzle. The fuel nozzle assembly further defines a head end. The system further includes a viewing device configured for capturing an image of at least a portion of the head end, and a processor communicatively coupled to the viewing device, the processor configured to compare the image to a standard image for the head end.

York, William David; Ziminsky, Willy Steve; Johnson, Thomas Edward; Stevenson, Christian Xavier

2013-03-05T23:59:59.000Z

83

OH-PLIF Measurements of High-Pressure, Hydrogen Augmented Premixed Flames in the SimVal Combustor  

SciTech Connect (OSTI)

Planar Laser Induced Fluorescence (PLIF) measurements of the hydroxyl radical in lean, premixed natural gas flames augmented with hydrogen are presented. The experiments were conducted in the SimVal combustor at the National Energy Technology Laboratory (NETL) at operating pressures from 1 to 8 atmospheres. The data, which was collected in a combustor with well controlled boundary conditions, is intended to be used for validating Computational Fluid Dynamics (CFD) models under conditions directly relevant to land-based gas turbine engines. The images, which show significant effects of hydrogen on local flame quenching are discussed in terms of a turbulent premixed combustion regime and non-dimensional parameters such as Karlovitz number. Pressure was found to thin the OH region, but only had a secondary effect on overall flame shape compared to the effects of hydrogen addition which was found to decrease local quenching and shorten the turbulent flame brush. A method to process the individual images based on local gradients of fluorescence intensity is proposed and results are presented. Finally, the results of several Large Eddy Simulations (LES) are presented and compared to the experimental data in an effort to understand the issues related to model validation, especially for simulations that do not include OH as an intermediate species.

Strakey, P.A.; Woodruff, S.D.; Williams, T.C. (Sandia); Schefer, R.W. (Sandia)

2007-01-01T23:59:59.000Z

84

Appliance and Equipment Standards Result in Large Energy, Economic, and  

Broader source: Energy.gov (indexed) [DOE]

Appliance and Equipment Standards Result in Large Energy, Economic, Appliance and Equipment Standards Result in Large Energy, Economic, and Environmental Benefits Appliance and Equipment Standards Result in Large Energy, Economic, and Environmental Benefits Saving Consumers and Businesses Energy and Money by Setting Efficiency Standards Saving Consumers and Businesses Energy and Money by Setting Efficiency Standards The Building Technologies Office (BTO) implements minimum energy conservation standards for more than 50 categories of appliances and equipment. As a result of these standards, energy users saved about $40 billion on their utility bills in 2010. Since 2009, 18 new or updated standards have been issued, which will help increase annual savings by more than 50 percent over the next decade. By 2030, cumulative operating cost

85

Alden Large Flume | Open Energy Information  

Open Energy Info (EERE)

Flume Flume Jump to: navigation, search Basic Specifications Facility Name Alden Large Flume Overseeing Organization Alden Research Laboratory, Inc Hydrodynamic Testing Facility Type Flume Length(m) 24.4 Beam(m) 6.1 Depth(m) 3.0 Water Type Freshwater Cost(per day) $5000/week Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 0.9 Maximum Velocity with Constriction(m/s) 3 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.0 Maximum Wave Height(m) at Wave Period(s) 0.0 Wave Period Range(s) 2.1 Current Velocity Range(m/s) 3.2 Programmable Wavemaking Yes Wavemaking Description Wave generators not yet designed Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Recirculating Yes Wind Capabilities Wind Capabilities Yes

86

Thermal Imaging Control of Furnaces and Combustors  

SciTech Connect (OSTI)

The object if this project is to demonstrate and bring to commercial readiness a near-infrared thermal imaging control system for high temperature furnaces and combustors. The thermal imaging control system, including hardware, signal processing, and control software, is designed to be rugged, self-calibrating, easy to install, and relatively transparent to the furnace operator.

David M. Rue; Serguei Zelepouga; Ishwar K. Puri

2003-02-28T23:59:59.000Z

87

National Grid (Electric) - Large Commercial Energy Efficiency Incentive  

Broader source: Energy.gov (indexed) [DOE]

National Grid (Electric) - Large Commercial Energy Efficiency National Grid (Electric) - Large Commercial Energy Efficiency Incentive Programs National Grid (Electric) - Large Commercial Energy Efficiency Incentive Programs < Back Eligibility Commercial Industrial Institutional Local Government Multi-Family Residential Retail Supplier Schools State Government Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Other Construction Heat Pumps Appliances & Electronics Commercial Lighting Lighting Maximum Rebate Custom Incentives: 50% of engineering studies and total costs until project reaches a 1.5 year simple payback. Program Info State Rhode Island Program Type Utility Rebate Program Rebate Amount Schools and New Buildings Custom Incentives: 75% of additional cost for efficiency upgrades AC/Heat Pumps: $30 - $125/ton

88

Chapter 9 - Large-Scale Hydrogen Energy Storage  

Science Journals Connector (OSTI)

Abstract Storage technologies are essential for the integration of fluctuating renewable energies. Large scale storage provides grid stability, which are fundamental for a reliable energy systems and the energy balancing in hours to weeks time ranges to match demand and supply. Our system analysis showed that storage needs are in the two-digit terawatt hour and gigawatt range. Other reports confirm that assessment by stating that by 2040, 40 TWh would be required for this application. The present chapter outlines the general components and functions as well as the economics of a large-scale hydrogen energy storage system.

Erik Wolf

2015-01-01T23:59:59.000Z

89

Energy Department Applauds Nation's First Large-Scale Industrial Carbon  

Broader source: Energy.gov (indexed) [DOE]

Energy Department Applauds Nation's First Large-Scale Industrial Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility August 24, 2011 - 6:23pm Addthis Washington, D.C. - The U.S. Department of Energy issued the following statement in support of today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009 economic stimulus legislation - the American Recovery and Reinvestment Act - the ambitious project will capture and store one million tons of carbon dioxide (CO2) per year produced as the result of processing corn into fuel-grade ethanol from the nearby Archer Daniels Midland biofuels plant. Since all of

90

Development of Large Format Lithium Ion Cells with Higher Energy...  

Broader source: Energy.gov (indexed) [DOE]

Hydrogen and Fuel Cells Program Review ES-127 Development of Large Format Lithium Ion Cells with Higher Energy Density Erin O'Driscoll (PI) Han Wu (Presenter) Dow Kokam May 13,...

91

Large Hospital 50% Energy Savings: Technical Support Document  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

867 867 September 2010 Large Hospital 50% Energy Savings: Technical Support Document Eric Bonnema, Daniel Studer, Andrew Parker, Shanti Pless, and Paul Torcellini National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36-08-GO28308 Technical Report NREL/TP-550-47867 September 2010 Large Hospital 50% Energy Savings: Technical Support Document Eric Bonnema, Daniel Studer, Andrew Parker, Shanti Pless, and Paul Torcellini Prepared under Task No. BEC7.1309 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government.

92

Large-Scale Renewable Energy Development on Public Lands  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Large-Scale Renewable Energy Large-Scale Renewable Energy Development on Public Lands Boyan Kovacic boyan.kovacic@ee.doe.gov 5/2/12 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov * BLM RE Drivers * BLM RE Programs * BLM Permitting and Revenues * Case Studies * Withdrawn Military Land Outline 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov BLM: Bureau of Land Management BO: Biological Opinion CSP: Concentrating Solar Power DOE: Department of Energy DOI: Department of Interior EA: Environmental Assessment EIS: Environmental Impact Statement FONSI: Finding of No Significant Impact FS: U.S. Forrest Service IM: Instruction Memorandum MPDS: Maximum Potential Development Scenario NEPA: National Environmental Policy Act NOI: Notice of Intent NOP: Notice to Proceed

93

Large-Scale Renewable Energy Development on Public Lands  

Broader source: Energy.gov (indexed) [DOE]

Large-Scale Renewable Energy Large-Scale Renewable Energy Development on Public Lands Boyan Kovacic boyan.kovacic@ee.doe.gov 5/2/12 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov * BLM RE Drivers * BLM RE Programs * BLM Permitting and Revenues * Case Studies * Withdrawn Military Land Outline 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov BLM: Bureau of Land Management BO: Biological Opinion CSP: Concentrating Solar Power DOE: Department of Energy DOI: Department of Interior EA: Environmental Assessment EIS: Environmental Impact Statement FONSI: Finding of No Significant Impact FS: U.S. Forrest Service IM: Instruction Memorandum MPDS: Maximum Potential Development Scenario NEPA: National Environmental Policy Act NOI: Notice of Intent NOP: Notice to Proceed

94

Use of incomplete energy recovery for the energy compression of large energy spread charged particle beams  

DOE Patents [OSTI]

A method of energy recovery for RF-base linear charged particle accelerators that allows energy recovery without large relative momentum spread of the particle beam involving first accelerating a waveform particle beam having a crest and a centroid with an injection energy E.sub.o with the centroid of the particle beam at a phase offset f.sub.o from the crest of the accelerating waveform to an energy E.sub.full and then recovering the beam energy centroid a phase f.sub.o+Df relative to the crest of the waveform particle beam such that (E.sub.full-E.sub.o)(1+cos(f.sub.o+Df))>dE/2 wherein dE=the full energy spread, dE/2=the full energy half spread and Df=the wave form phase distance.

Douglas, David R. (Newport News, VA); Benson, Stephen V. (Yorktown, VA)

2007-01-23T23:59:59.000Z

95

North Dakota's At-large congressional district: Energy Resources | Open  

Open Energy Info (EERE)

Dakota's At-large congressional district: Energy Resources Dakota's At-large congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in North Dakota. Registered Energy Companies in North Dakota's At-large congressional district Alchem Ltd Blue Flint Ethanol Crownbutte Wind Power LLC DMI Industries EERC Center for Biomass Utilization EERC National Center for Hydrogen Technology Global Electric Motorcars Government of North Dakota M Power LLC Nor-son Construction Plains CO2 Reduction Partnership PCOR Tharaldson Ethanol LLC Wanzek Construction Wanzek Construction Inc Retrieved from "http://en.openei.org/w/index.php?title=North_Dakota%27s_At-large_congressional_district&oldid=196380"

96

EIS-0289: JEA Circulating Fluidized Bed Combustor Project | Department of  

Broader source: Energy.gov (indexed) [DOE]

289: JEA Circulating Fluidized Bed Combustor Project 289: JEA Circulating Fluidized Bed Combustor Project EIS-0289: JEA Circulating Fluidized Bed Combustor Project SUMMARY This EIS assesses environmental issues associated with constructing and demonstrating a project that would be cost-shared by DOE and JEA (formerly the Jacksonville Electric Authority) under the Clean Coal Technology Program. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD December 7, 2000 EIS-0289: Record of Decision JEA Circulating Fluidized Bed Combustor Project, Jacksonville, Duval County, FL June 1, 2000 EIS-0289: Final Environmental Impact Statement JEA Circulating Fluidized Bed Combustor Project August 1, 1999 EIS-0289: Draft Environmental Impact Statement JEA Circulating Fluidized Bed Combustor

97

Test results of a catalytic combustor for a gas turbine  

Science Journals Connector (OSTI)

A catalytically assisted low \\{NOx\\} combustor has been developed which has the advantage of catalyst durability. Combustion characteristics of catalysts at high pressure were investigated using a bench scale reactor and an improved catalyst was selected. A combustor for multi-can type gas turbine of 10 MW class was designed and tested at high-pressure conditions using liquefied natural gas (LNG) fuel. This combustor is composed of a burner system and a premixed combustion zone in a ceramic type liner. The burner system consists of catalytic combustor segments and premixing nozzles. Catalyst bed temperature is controlled under 1000°C, premixed gas is injected from the premixing nozzles to catalytic combustion gas and lean premixed combustion is carried out in the premixed combustion zone. As a result of the combustion tests, \\{NOx\\} emission was lower than 5 ppm converted at 16% O2 at a combustor outlet temperature of 1350°C and a combustor inlet pressure of 1.33 MPa.

Y Ozawa; T Fujii; Y Tochihara; T Kanazawa; K Sagimori

1998-01-01T23:59:59.000Z

98

Low pressure combustor for generating steam downhole  

SciTech Connect (OSTI)

A compact catalytic combustor for generating steam downhole in an oil reservoir has steam generating tubes that are attached to a metal catalyst support. The metal support comprises sheets of metal that are spaced apart and transverse to the tubes. Heat from combustion is generated on the metal sheets and is conducted to the steam generating tubes. The steam is injected into the oil reservoir. The combustion gas is vented to ground level.

Retallick, W.B.

1983-03-22T23:59:59.000Z

99

Pulsed atmospheric fluidized bed combustor apparatus  

DOE Patents [OSTI]

A pulsed atmospheric fluidized bed reactor system is disclosed and claimed along with a process for utilization of same for the combustion of, e.g. high sulfur content coal. The system affords a economical, ecologically acceptable alternative to oil and gas fired combustors. The apparatus may also be employed for endothermic reaction, combustion of waste products, e.g., organic and medical waste, drying materials, heating air, calcining and the like.

Mansour, Momtaz N. (Columbia, MD)

1993-10-26T23:59:59.000Z

100

Nuclear Interaction of Very High Energy Muons at Large Momentum Transfer  

Science Journals Connector (OSTI)

......Nuclear Interaction of Very High Energy Muons at Large Momentum Transfer Kimio...nuclear interaction of very high energy muons with large energy transfers of...Nuclear Interaction of Very High Energy Muons at Large Mlomentum Transfer Kimio......

Kimio Fujimura

1965-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Transient heat transfer properties in a pulse detonation combustor .  

E-Print Network [OSTI]

??The heat transfer along the axis of a pulse detonation combustor has been characterized for various frequencies and fill fractions at 2.5 atmospheres of pressure… (more)

Fontenot, Dion G.

2011-01-01T23:59:59.000Z

102

Apparatus and method for cooling a combustor cap  

DOE Patents [OSTI]

A combustor includes an end cap having a perforated downstream plate and a combustion chamber downstream of the downstream plate. A plenum is in fluid communication with the downstream plate and supplies a cooling medium to the combustion chamber through the perforations in the downstream plate. A method for cooling a combustor includes flowing a cooling medium into a combustor end cap and impinging the cooling medium on a downstream plate in the combustor end cap. The method further includes flowing the cooling medium into a combustion chamber through perforations in the downstream plate.

Zuo, Baifang; Washam, Roy Marshall; Wu, Chunyang

2014-04-29T23:59:59.000Z

103

INNOVATIVE TECHNIQUES TO IMPROVE MIXING AND PENETRATION IN SCRAMJET COMBUSTORS.  

E-Print Network [OSTI]

??Scramjet combustors are characterized by an extremely short residence time for the completion of fuel atomization, mixing and combustion. It is therefore desired to develop… (more)

MURUGAPPAN, SHANMUGAM

2005-01-01T23:59:59.000Z

104

Effects of the reacting flowfield on combustion processes in a stagnation point reverse flow combustor.  

E-Print Network [OSTI]

??The performance of dry, low NOx gas turbines, which employ lean premixed (or partially premixed) combustors, is often limited by combustor stability. To overcome this… (more)

Gopalakrishnan, Priya

2008-01-01T23:59:59.000Z

105

Energy Department Applauds Nation's First Large-Scale Industrial Carbon  

Broader source: Energy.gov (indexed) [DOE]

Nation's First Large-Scale Industrial Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility August 24, 2011 - 6:23pm Addthis Washington, D.C. - The U.S. Department of Energy issued the following statement in support of today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009 economic stimulus legislation - the American Recovery and Reinvestment Act - the ambitious project will capture and store one million tons of carbon dioxide (CO2) per year produced as the result of processing corn into fuel-grade ethanol from the nearby Archer Daniels Midland biofuels plant. Since all of

106

For economic energy, we need: tritium, large size to obtain hot fusing plasma; high fields and large currents  

E-Print Network [OSTI]

-D, and not optimised for neutron production) Fusion for ENERGY is difficult: #12;22 The smaller scale (and possible11 For economic energy, we need: tritium, large size to obtain hot fusing plasma; high fields and large currents high running costs, large stored energy (beware disruptions, ELMs) Fusion for NEUTRONS

107

Energy calibration of large underwater detectors using stopping muons  

E-Print Network [OSTI]

We propose to use stopping cosmic-ray muons in the energy calibration of planned and deployed large underwater detectors. The method is based on the proportionality between the incident muon energy and the length of the muon path before it stops. Simultaneous measurements of the muon path and the amplitude of the signal from the photomultiplier tubes allow a relation between the energy deposited in the sensitive volume of the detector and the observed signal to be derived, and also provide a test of detector simulations. We describe the proposed method and present the results of simulations.

V. A. Kudryavtsev; R. A. Brook; S. L. Cartwright; J. E. McMillan; N. J. C. Spooner; L. F. Thompson

2000-10-21T23:59:59.000Z

108

Energy calibration of large underwater detectors using stopping muons  

Science Journals Connector (OSTI)

We propose to use stopping cosmic-ray muons in the energy calibration of planned and deployed large underwater detectors. The method is based on the proportionality between the incident muon energy and the length of the muon path before it stops. Simultaneous measurements of the muon path and the amplitude of the signal from the photomultiplier tubes allow a relation between the energy deposited in the sensitive volume of the detector and the observed signal to be derived, and also provide a test of detector simulations. We describe the proposed method and present the results of simulations.

V.A. Kudryavtsev; R.A. Brook; S.L. Cartwright; J.E. McMillan; N.J.C. Spooner; L.F. Thompson

2000-01-01T23:59:59.000Z

109

The Very Large Hadron Collider: The farthest energy frontier  

SciTech Connect (OSTI)

The Very Large Hadron Collider (or Eloisatron) represents what may well be the final step on the energy frontier of accelerator-based high energy physics. While an extremely high luminosity proton collider at 100-200 TeV center of mass energy can probably be built in one step with LHC technology, that machine would cost more than what is presently politically acceptable. This talk summarizes the strategies of collider design including staged deployment, comparison with electron-positron colliders, opportunities for major innovation, and the technical challenges of reducing costs to manageable proportions. It also presents the priorities for relevant R and D for the next few years.

Barletta, William A.

2001-06-21T23:59:59.000Z

110

Development of a catalytically assisted combustor for a gas turbine  

Science Journals Connector (OSTI)

A catalytically assisted low \\{NOx\\} combustor has been developed which has the advantage of catalyst durability. This combustor is composed of a burner section and a premixed combustion section behind the burner section. The burner system consists of six catalytic combustor segments and six premixing nozzles, which are arranged alternately and in parallel. Fuel flow rate for the catalysts and the premixing nozzles are controlled independently. The catalytic combustion temperature is maintained under 1000°C, additional premixed gas is injected from the premixing nozzles into the catalytic combustion gas, and lean premixed combustion at 1300°C is carried out in the premixed combustion section. This system was designed to avoid catalytic deactivation at high temperature and thermal or mechanical shock fracture of the honeycomb monolith. In order to maintain the catalyst temperature under 1000°C, the combustion characteristics of catalysts at high pressure were investigated using a bench scale reactor and an improved catalyst was selected for the combustor test. A combustor for a 20 MW class multi-can type gas turbine was designed and tested under high pressure conditions using LNG fuel. Measurements of NOx, CO and unburned hydrocarbon were made and other measurements were made to evaluate combustor performance under various combustion temperatures and pressures. As a result of the tests, it was proved that \\{NOx\\} emission was lower than 10 ppm converted at 16% O2, combustion efficiency was almost 100% at 1300°C of combustor outlet temperature and 13.5 ata of combustor inlet pressure.

Yasushi Ozawa; Tomoharu Fujii; Mikio Sato; Takaaki Kanazawa; Hitoshi Inoue

1999-01-01T23:59:59.000Z

111

OXY-fuel Combustion at the CANMET Vertical Combustor Research Faciltiy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OXY-FUEL COMBUSTION OXY-FUEL COMBUSTION At the CANMET Vertical Combustor Research Facility M.A.Douglas 1 ( madougla@nrcan.gc.ca ; +001-613-996-2761) E. Chui ( echui@nrcan.gc.ca ; +001-613-943-1774) Y. Tan ( ytan@nrcan.gc.ca ; +001-613-992- 8150) G. K. Lee 2 ( gklee@magma.ca ; +001-613-829-3845) E. Croiset 3 ( ecroiset@uwaterloo.ca ; +001-519-888-4567-ext 6472) K. V. Thambimuthu 4 ( kelly.thambimuthu@nrcan.gc.ca ) CANMET Energy Technology Centre, Natural Resources Canada, 1 Haanel Dr., Ottawa, Ontario, Canada, K1A 1M1 ABSTRACT The CANMET Energy Technology Center is a division of Natural Resources Canada and undertakes primary research and technology development activities for the benefit of Canadians and a wide range of external clients. The Vertical Combustor Research Facility (VCRF) was built in 1994 and is CANMET's

112

First Beam for Large Hadron Collider | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Beam for Large Hadron Collider Beam for Large Hadron Collider First Beam for Large Hadron Collider September 10, 2008 - 3:20pm Addthis WASHINGTON, DC - An international collaboration of scientists today sent the first beam of protons zooming at nearly the speed of light around the world's most powerful particle accelerator-the Large Hadron Collider (LHC)-located at the CERN laboratory near Geneva, Switzerland. The U.S. Department of Energy (DOE) and the National Science Foundation (NSF) invested a total $531 million in the construction of the accelerator and its detectors, which scientists believe could help unlock extraordinary discoveries about the nature of the physical universe. Celebrations across the U.S. and around the world mark the LHC's first circulating beam, an occasion more than 15 years in the making. An

113

Large Synoptic Survey Telescope: Dark Energy Science Collaboration  

E-Print Network [OSTI]

This white paper describes the LSST Dark Energy Science Collaboration (DESC), whose goal is the study of dark energy and related topics in fundamental physics with data from the Large Synoptic Survey Telescope (LSST). It provides an overview of dark energy science and describes the current and anticipated state of the field. It makes the case for the DESC by laying out a robust analytical framework for dark energy science that has been defined by its members and the comprehensive three-year work plan they have developed for implementing that framework. The analysis working groups cover five key probes of dark energy: weak lensing, large scale structure, galaxy clusters, Type Ia supernovae, and strong lensing. The computing working groups span cosmological simulations, galaxy catalogs, photon simulations and a systematic software and computational framework for LSST dark energy data analysis. The technical working groups make the connection between dark energy science and the LSST system. The working groups have close linkages, especially through the use of the photon simulations to study the impact of instrument design and survey strategy on analysis methodology and cosmological parameter estimation. The white paper describes several high priority tasks identified by each of the 16 working groups. Over the next three years these tasks will help prepare for LSST analysis, make synergistic connections with ongoing cosmological surveys and provide the dark energy community with state of the art analysis tools. Members of the community are invited to join the LSST DESC, according to the membership policies described in the white paper. Applications to sign up for associate membership may be made by submitting the Web form at http://www.slac.stanford.edu/exp/lsst/desc/signup.html with a short statement of the work they wish to pursue that is relevant to the LSST DESC.

LSST Dark Energy Science Collaboration

2012-11-01T23:59:59.000Z

114

Computational analysis of incompressible turbulent flow in an idealised swirl combustor  

Science Journals Connector (OSTI)

Isothermal turbulent swirling flow in a water test rig, representing an idealised swirl combustor, has been investigated experimentally and numerically. The Reynolds number based on combustor inlet diameter and mean axial velocity was 4600. Two cases were investigated at two different swirl intensities. Time-averaged velocities and RMS turbulence intensities were measured by Laser Doppler Anemometer (LDA), along radial traverses at different axial stations. In the three-dimensional, transient computations, Large Eddy Simulations (LES) and URANS Reynolds Stress Models (RSM) have basically been employed as modelling strategies for turbulence. To model subgrid-scale (SGS) turbulence for LES, the models owing to Smagorinsky and Voke were used. In one of the cases, Detached Eddy Simulations (DES) were also applied. The predictions have been compared with the measurements. It has been observed that LES provides the best overall accuracy, where no significant differences between the Smagorinsky and Voke models could be discerned.

A.C. Benim; M.P. Escudier; A. Nahavandi; A.K. Nickson; K.J. Syed; F. Joos

2011-01-01T23:59:59.000Z

115

Large Scale GSHP as Alternative Energy for American Farmers Geothermal  

Open Energy Info (EERE)

GSHP as Alternative Energy for American Farmers Geothermal GSHP as Alternative Energy for American Farmers Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale GSHP as Alternative Energy for American Farmers Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description We propose a large scale demonstration of solar assisted GSHP systems on two poultry farms in mid-Missouri. The heating load of Farm A with 4 barns will be 510 tons and Farm B with 5 barns will be 440 tons. Solar assisted GSHP systems will be installed, and new utility business model will be applied to both farms. Farm A will be constructed with commercial products in order to bring immediate impact to the industry. Farm B will also have a thermal energy storage system installed, and improved solar collectors will be used. A comprehensive energy analysis and economic study will be conducted.

116

High energy physics - The large and the small  

SciTech Connect (OSTI)

In this Sixth International School on Field Theory and Gravitation, I was invited to give this talk to the students and researchers of Field Theory mainly about LHC - The Large Hadron Collider and results. I will try to summarize the main daily life of the high energy physics and give an idea about the experiments and the expectations for the near future. I will comment the present results and the prospects to LHC/CMS.

Santoro, Alberto [Universidade do Estado do Rio de Janeiro (Brazil)

2012-09-24T23:59:59.000Z

117

Building Energy Software Tools Directory: ID-Spec Large  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ID-Spec Large ID-Spec Large ID-Spec Large is software for the electrical installation design of industrial and tertiary buildings. It helps to design a green electrical installation by enabling the user to: - Assess the impact of selecting energy efficiency solutions like power factor correction and low losses transformers in terms of cost savings - Reduce power losses and consequently carbon emissions in the electrical installation by optimizing equipment locations - Reduce investment cost while using less raw materials by optimizing length and cross-section of cables - Assess the percentage of recyclable materials for cables and busbar trunking systems. Screen Shots Keywords Electrical installation design, power losses assessment, CO2 emissions, quantity of conductors

118

Energy-Aware Resource Management and Green Energy Use for Large-Scale Datacenters: A Survey  

Science Journals Connector (OSTI)

As cloud computing gains a lot of attention that provides various service abilities, large-scale datacenters become dominant components of the cloud infrastructure. Huge energy consumption appears to be nonignora...

Xiaoying Wang; Xiaojing Liu; Lihua Fan…

2014-01-01T23:59:59.000Z

119

Mercury emissions from municipal solid waste combustors  

SciTech Connect (OSTI)

This report examines emissions of mercury (Hg) from municipal solid waste (MSW) combustion in the United States (US). It is projected that total annual nationwide MSW combustor emissions of mercury could decrease from about 97 tonnes (1989 baseline uncontrolled emissions) to less than about 4 tonnes in the year 2000. This represents approximately a 95 percent reduction in the amount of mercury emitted from combusted MSW compared to the 1989 mercury emissions baseline. The likelihood that routinely achievable mercury emissions removal efficiencies of about 80 percent or more can be assured; it is estimated that MSW combustors in the US could prove to be a comparatively minor source of mercury emissions after about 1995. This forecast assumes that diligent measures to control mercury emissions, such as via use of supplemental control technologies (e.g., carbon adsorption), are generally employed at that time. However, no present consensus was found that such emissions control measures can be implemented industry-wide in the US within this time frame. Although the availability of technology is apparently not a limiting factor, practical implementation of necessary control technology may be limited by administrative constraints and other considerations (e.g., planning, budgeting, regulatory compliance requirements, etc.). These projections assume that: (a) about 80 percent mercury emissions reduction control efficiency is achieved with air pollution control equipment likely to be employed by that time; (b) most cylinder-shaped mercury-zinc (CSMZ) batteries used in hospital applications can be prevented from being disposed into the MSW stream or are replaced with alternative batteries that do not contain mercury; and (c) either the amount of mercury used in fluorescent lamps is decreased to an industry-wide average of about 27 milligrams of mercury per lamp or extensive diversion from the MSW stream of fluorescent lamps that contain mercury is accomplished.

Not Available

1993-05-01T23:59:59.000Z

120

Characterization of supersonic mixing in a nonreacting Mach 2 combustor  

SciTech Connect (OSTI)

Planar measurements of the injection mole fraction distribution and the velocity field within a nonreacting model SCRAMJET combustor have been made using laser-induced iodine fluorescence. The combustor geometry investigated in this work is staged transverse injection of air into a Mach 2 freestream. A complete three-dimensional survey of the injectant mole fraction distribution has been generated and a single planar velocity measurement has been completed. The measurements reveal the dramatic effect of streamwise vortices on the mixing of the injectant in the near field of the injectors, as well as the rapid mixing generated by staging two field injectors. Analysis of the downstream decay of the maximum injectant mole fraction in this and other nonreacting combustor geometries indicates that the relative rate of injectant mixing well downstream of the injectors is independent of combustor geometry, combustor Mach number, and injectant molecular weight. Mixing within this region of the combustor is dominated by turbulent diffusion within the injectant plume. The transition of the dominant mixing mechanism, from vortex-driven mixing in the near field to turbulent diffusion in the far field, was found to occur in the region between 10 and 20 jet diameters downstream of the injectors. 22 refs.

Hollo, S.D.; Mcdaniel, J.C.; Hartfield, R.J., JR. (Virginia, University, Charlottesville (United States))

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network [OSTI]

provide more guidance and support. Large  Scale  Computing  and  Storage  Requirements  for  Fusion  Energy  provide much-needed additional resources there remains a need to employ codes Large  Scale  Computing  and  Storage  Requirements  for  Fusion  Energy  provide large gains with little application porting effort. Large  Scale  Computing  and  Storage  Requirements  for  Fusion  Energy  

Gerber, Richard

2012-01-01T23:59:59.000Z

122

Performance of large electron energy filter in large volume plasma device  

SciTech Connect (OSTI)

This paper describes an in-house designed large Electron Energy Filter (EEF) utilized in the Large Volume Plasma Device (LVPD) [S. K. Mattoo, V. P. Anita, L. M. Awasthi, and G. Ravi, Rev. Sci. Instrum. 72, 3864 (2001)] to secure objectives of (a) removing the presence of remnant primary ionizing energetic electrons and the non-thermal electrons, (b) introducing a radial gradient in plasma electron temperature without greatly affecting the radial profile of plasma density, and (c) providing a control on the scale length of gradient in electron temperature. A set of 19 independent coils of EEF make a variable aspect ratio, rectangular solenoid producing a magnetic field (B{sub x}) of 100?G along its axis and transverse to the ambient axial field (B{sub z} ? 6.2?G) of LVPD, when all its coils are used. Outside the EEF, magnetic field reduces rapidly to 1?G at a distance of 20 cm from the center of the solenoid on either side of target and source plasma. The EEF divides LVPD plasma into three distinct regions of source, EEF and target plasma. We report that the target plasma (n{sub e} ? 2 × 10{sup 11}?cm{sup ?3} and T{sub e} ? 2?eV) has no detectable energetic electrons and the radial gradients in its electron temperature can be established with scale length between 50?and?600 cm by controlling EEF magnetic field. Our observations reveal that the role of the EEF magnetic field is manifested by the energy dependence of transverse electron transport and enhanced transport caused by the plasma turbulence in the EEF plasma.

Singh, S. K.; Srivastava, P. K.; Awasthi, L. M.; Mattoo, S. K.; Sanyasi, A. K.; Kaw, P. K. [Institute for Plasma Research, Gandhinagar 382 428, Gujarat (India)] [Institute for Plasma Research, Gandhinagar 382 428, Gujarat (India); Singh, R. [Institute for Plasma Research, Gandhinagar 382 428, Gujarat (India) [Institute for Plasma Research, Gandhinagar 382 428, Gujarat (India); WCI Center for Fusion Theory, National Fusion Research Institute Gwahangno 113, Yu-seong-gu, Daejeon, 305-333 (Korea, Republic of)

2014-03-15T23:59:59.000Z

123

DOE/EIS-0289, Final Environmental Impact Statement for the JEA Circulating Fluidized Bed Combustor Project (June 1, 2000)  

Broader source: Energy.gov (indexed) [DOE]

FINAL FINAL ENVIRONMENTAL IMPACT STATEMENT FOR THE JEA CIRCULATING FLUIDIZED BED COMBUSTOR PROJECT JACKSONVILLE, FLORIDA June 2000 U.S. DEPARTMENT OF ENERGY COVER SHEET June 2000 RESPONSIBLE AGENCY U.S. Department of Energy (DOE) TITLE Final Environmental Impact Statement for the JEA Circulating Fluidized Bed Combustor Project; Jacksonville, Duval County, Florida CONTACT Additional copies or information concerning this final environmental impact statement (EIS) can be obtained from Ms. Lisa K. Hollingsworth, National Environmental Policy Act (NEPA) Document Manager, U.S. Department of Energy, National Energy Technology Laboratory, 3610 Collins Ferry Road, P. O. Box 880, Morgantown, WV 26507-0880. Telephone: (304) 285-4992. Fax: (304) 285-4403. E-mail: lisa.hollingsworth@netl.doe.gov.

124

DOE/EIS-0289; Draft Environmental Impact Statement for the JEA Circulating Fluidized Bed Combustor Project, August 1999  

Broader source: Energy.gov (indexed) [DOE]

Draft Draft ENVIRONMENTAL IMPACT STATEMENT FOR THE JEA CIRCULATING FLUIDIZED BED COMBUSTOR PROJECT JACKSONVILLE, FLORIDA August 1999 U.S. DEPARTMENT OF ENERGY COVER SHEET August 1999 RESPONSIBLE AGENCY U.S. Department of Energy (DOE) TITLE Draft Environmental Impact Statement for the JEA Circulating Fluidized Bed Combustor Project; Jacksonville, Duval County, Florida CONTACT Additional copies or information concerning this draft environmental impact statement (EIS) can be obtained from Ms. Lisa K. Hollingsworth, National Environmental Policy Act (NEPA) Document Manager, U.S. Department of Energy, Federal Energy Technology Center, 3610 Collins Ferry Road, P. O. Box 880, Morgantown, WV 26507-0880. Telephone: (304) 285-4992. Fax: (304) 285-4403. E-mail: lisa.hollingsworth@fetc.doe.gov.

125

Flow conditioner for fuel injector for combustor and method for low-NO.sub.x combustor  

DOE Patents [OSTI]

An injector for a gas turbine combustor including a catalyst coated surface forming a passage for feed gas flow and a channel for oxidant gas flow establishing an axial gas flow through a flow conditioner disposed at least partially within an inner wall of the injector. The flow conditioner includes a length with an interior passage opening into upstream and downstream ends for passage of the axial gas flow. An interior diameter of the interior passage smoothly reduces and then increases from upstream to downstream ends.

Dutta, Partha; Smith, Kenneth O.; Ritz, Frank J.

2013-09-10T23:59:59.000Z

126

Department of Energy assessment of the Large Hadron Collider  

SciTech Connect (OSTI)

This report summarizes the conclusions of the committee that assessed the cost estimate for the Large Hadron Collider (LHC). This proton-proton collider will be built at CERN, the European Laboratory for Particle Physics near Geneva, Switzerland. The committee found the accelerator-project cost estimate of 2.3 billion in 1995 Swiss francs, or about $2 billion US, to be adequate and reasonable. The planned project completion date of 2005 also appears achievable, assuming the resources are available when needed. The cost estimate was made using established European accounting procedures. In particular, the cost estimate does not include R and D, prototyping and testing, spare parts, and most of the engineering labor. Also excluded are costs for decommissioning the Large Electron-Positron collider (LEP) that now occupies the tunnel, modifications to the injector system, the experimental areas, preoperations costs, and CERN manpower. All these items are assumed by CERN to be included in the normal annual operations budget rather than the construction budget. Finally, contingency is built into the base estimate, in contrast to Department of Energy (DOE) estimates that explicitly identify contingency. The committee`s charge, given by Dr. James F. Decker, Deputy Directory of the DOE Office of Energy Research, was to understand the basis for the LHC cost estimate, identify uncertainties, and judge the overall validity of the estimate, proposed schedule, and related issues. The committee met at CERN April 22--26, 1996. The assessment was based on the October 1995 LHC Conceptual Design Report or ``Yellow Book,`` cost estimates and formal presentations made by the CERN staff, site inspection, detailed discussions with LHC technical experts, and the committee members` considerable experience.

NONE

1996-06-01T23:59:59.000Z

127

Comparison of Large Scale Renewable Energy Projects for the United States Air Force.  

E-Print Network [OSTI]

??This thesis focused on the performance of large-scale renewable energy projects for the United States Air Force. As global energy demands continue to rise, the… (more)

Hughes, Jeffrey S

2012-01-01T23:59:59.000Z

128

Fuel Flexible, Low Emission Catalytic Combustor for Opportunity Fuel Applications  

SciTech Connect (OSTI)

Limited fuel resources, increasing energy demand and stringent emission regulations are drivers to evaluate process off-gases or process waste streams as fuels for power generation. Often these process waste streams have low energy content and/or highly reactive components. Operability of low energy content fuels in gas turbines leads to issues such as unstable and incomplete combustion. On the other hand, fuels containing higher-order hydrocarbons lead to flashback and auto-ignition issues. Due to above reasons, these fuels cannot be used directly without modifications or efficiency penalties in gas turbine engines. To enable the use of these wide variety of fuels in gas turbine engines a rich catalytic lean burn (RCL®) combustion system was developed and tested in a subscale high pressure (10 atm.) rig. The RCL® injector provided stability and extended turndown to low Btu fuels due to catalytic pre-reaction. Previous work has shown promise with fuels such as blast furnace gas (BFG) with LHV of 85 Btu/ft3 successfully combusted. This program extends on this work by further modifying the combustor to achieve greater catalytic stability enhancement. Fuels containing low energy content such as weak natural gas with a Lower Heating Value (LHV) of 6.5 MJ/m3 (180 Btu/ft3 to natural gas fuels containing higher hydrocarbon (e.g ethane) with LHV of 37.6 MJ/m3 (1010 Btu/ft3) were demonstrated with improved combustion stability; an extended turndown (defined as the difference between catalytic and non-catalytic lean blow out) of greater than 250oF was achieved with CO and NOx emissions lower than 5 ppm corrected to 15% O2. In addition, for highly reactive fuels the catalytic region preferentially pre-reacted the higher order hydrocarbons with no events of flashback or auto-ignition allowing a stable and safe operation with low NOx and CO emissions.

Eteman, Shahrokh

2013-06-30T23:59:59.000Z

129

Tube construction for fluidized bed combustor  

DOE Patents [OSTI]

A fluidized bed combustor comprises a reactor or a housing which has a windbox distributor plate adjacent the lower end thereof which contains a multiplicity of hole and air discharge nozzles for discharging air and coal into a fluidized bed which is maintained above the distributor plate and below a take-off connection or flue to a cyclone separator in which some of the products of combustion are treated to remove the dust which is returned into the fluidized bed. A windbox is spaced below the fluidized bed and it has a plurality of tubes passing therethrough with the passage of combustion air and fluidizing air which passes through an air space so that fluidizing air is discharged into the reaction chamber fluidized bed at the bottom thereof to maintain the bed in a fluidized condition. A fluid, such as air, is passed through the tubes which extend through the windbox and provide a preheating of the combustion air and into an annular space between telescoped inner and outer tubes which comprise heat exchanger tubes or cooling tubes which extend upwardly through the distributor plate into the fluidized bed. The heat exchanger tubes are advantageously arranged so that they may be exposed in groups within the reactor in a cluster which is arranged within holding rings.

De Feo, Angelo (Totowa, NJ); Hosek, William (Mt. Tabor, NJ)

1984-01-01T23:59:59.000Z

130

Fluidized bed combustor and tube construction therefor  

DOE Patents [OSTI]

A fluidized bed combustor comprises a reactor or a housing which has a windbox distributor plate adjacent the lower end thereof which contains a multiplicity of hole and air discharge nozzles for discharging air and coal into a fluidized bed which is maintained above the distributor plate and below a take-off connection or flue to a cyclone separator in which some of the products of combustion are treated to remove the dust which is returned into the fluidized bed. A windbox is spaced below the fluidized bed and it has a plurality of tubes passing therethrough with the passage of combustion air and fluidizing air which passes through an air space so that fluidizing air is discharged into the reaction chamber fluidized bed at the bottom thereof to maintain the bed in a fluidized condition. A fluid, such as air, is passed through the tubes which extend through the windbox and provide a preheating of the combustion air and into an annular space between telescoped inner and outer tubes which comprise heat exchanger tubes or cooling tubes which extend upwardly through the distributor plate into the fluidized bed. The heat exchanger tubes are advantageously arranged so that they may be exposed in groups within the reactor in a cluster which is arranged within holding rings.

De Feo, Angelo (Passaic, NJ); Hosek, William (Morris, NJ)

1981-01-01T23:59:59.000Z

131

An Operational Energy Consumption Evaluation Index System for Large Public Buildings  

E-Print Network [OSTI]

Large public buildings have been the emphasis of energy conservation in China. In this paper, the design and operational energy consumption evaluation indices for large public buildings are generalized, their differences and deficiencies...

Li, Y.; Zhang, J.; Sun, D.

2006-01-01T23:59:59.000Z

132

Fuel-Flexible, Low-Emissions Catalytic Combustor for Opportunity Fuels  

Broader source: Energy.gov [DOE]

Factsheet overview of how project will develop a unique, feul-flexible catalytic combustor for gas turbines

133

Room-temperature stationary sodium-ion batteries for large-scale electric energy storage  

E-Print Network [OSTI]

energy and utility applications, such as pump hydro, compressed air, y-wheel and electrochemicalRoom-temperature stationary sodium-ion batteries for large-scale electric energy storage Huilin Pan attention particularly in large- scale electric energy storage applications for renewable energy and smart

Wang, Wei Hua

134

Energy Dispersed Large Data Wave Maps in 2 + 1 Dimensions  

E-Print Network [OSTI]

of Finite S Norm Wave-Maps and Energy Dispersion 10.1renormalization of large energy wave maps. In: Journées “of Finite S Norm Wave-Maps and Energy Dispersion In this

Sterbenz, Jacob; Tataru, Daniel

2010-01-01T23:59:59.000Z

135

What Large Purchases or Improvements Have You Made to Save Energy? |  

Broader source: Energy.gov (indexed) [DOE]

Large Purchases or Improvements Have You Made to Save Energy? Large Purchases or Improvements Have You Made to Save Energy? What Large Purchases or Improvements Have You Made to Save Energy? June 4, 2009 - 3:51pm Addthis On Tuesday, Elizabeth wrote about purchasing energy-efficient appliances. New appliances can be a fairly large investment upfront, but can help you save over the life of the product. The Stay Cool, Save Money site and Energy Savers site both offer many ideas for larger investments that can help you save energy and money in the long term. What large purchases or improvements have you made to save energy? Each Thursday, you have the chance to share your thoughts on a topic related to energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov.

136

Method for operating a combustor in a fuel cell system  

DOE Patents [OSTI]

In one aspect, the invention provides a method of operating a combustor to heat a fuel processor to a desired temperature in a fuel cell system, wherein the fuel processor generates hydrogen (H.sub.2) from a hydrocarbon for reaction within a fuel cell to generate electricity. More particularly, the invention provides a method and select system design features which cooperate to provide a start up mode of operation and a smooth transition from start-up of the combustor and fuel processor to a running mode.

Clingerman, Bruce J. (Palmyra, NY); Mowery, Kenneth D. (Noblesville, IN)

2002-01-01T23:59:59.000Z

137

Performance of Steam Production by Biomass Combustor for Agro-industry  

Science Journals Connector (OSTI)

Abstract This research paper aims to particularly raise the issue how optimization of steam production produced by a biomass combustor is regarded to agricultural industry, for the produced steam will consequently be applied to sterilization or even drying process. The most optimal level of steam production will be explored as to how to optimally achieve flow rate of air, rate of fuel input, the rate of steam production, and steam production in compliance with the given 100 kg/h capacity and the required temperature of between 90-100°C . Biomass steam production incorporates 3 major parts: 1) biomass combustor, 2) heat exchanger system (coiled tube), and 3) control system, administered the whole process, located at the School of Renewable Energy Technology, Naresuan University, Phitsanulok. A combustion system was tested through the implementation of eucalyptus charcoal as the main source of energy. The research finding revealed that the combustion system could generate steam at 100 kg/h which consumed eucalyptus charcoal at the temperature value of Heating value of fuel (HHV) was 30.0 MJ/kg. This was conducted within the biomass combustor, engaged with a coil tube, at the flow rate of 172.8 kg/h, the value of feed rate of fuel at 15 kg/h, and a steam production rate at 100 kg/h respectively. The efficiency of steam production was at 58.25%. When the taken result was brought to compare with a mathematical model with experiment result of steam production, it was found out that the error value was 0.9997 which could usefully be used to predict steam production in the system. With reference to the economical benefit, when compared to steam production produced by LPG fuel at 100 kg/h production rate, it was obvious that steam production generated by biomass could redeem the spent investing cost with less than one year. This would greatly be interesting and applicable to industry particularly agriculture that steam production by biomass combustor with helical coiled boiler technique will be used to energy backup for drying system. However steam production will be supported drying system after utilization in another thermal process the temperature not more than 100°C within industrial or industrial house hold.

B. Prasit; P. Maneechot

2014-01-01T23:59:59.000Z

138

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network [OSTI]

research program in Quantum Chromodynamics (QCD). This research addresses fundamental questions in high energy and nuclear

Gerber, Richard A.

2011-01-01T23:59:59.000Z

139

Large Scale Computing and Storage Requirements for High Energy Physics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for High Energy Physics for High Energy Physics Accelerator Physics P. Spentzouris, Fermilab Motivation Accelerators enable many important applications, both in basic research and applied sciences Different machine attributes are emphasized for different applications * Different particle beams and operation principles * Different energies and intensities Accelerator science and technology objectives for all applications * Achieve higher energy and intensity, faster and cheaper machine design, more reliable operation a wide spectrum of requirements for very complex instruments. Assisting their design and operation requires an equally complex set of computational tools. High Energy Physics Priorities High energy frontier * Use high-energy colliders to discover new particles and

140

Interference mechanisms of acoustic/convective disturbances in a swirl-stabilized lean-premixed combustor  

Science Journals Connector (OSTI)

Interference mechanisms of acoustic/convective disturbances were experimentally investigated in a swirl-stabilized lean-premixed gas turbine combustor operated with natural gas fuel and air at atmospheric pressure and elevated temperature. Interference between azimuthal and acoustic velocity disturbances at high-amplitude limit cycle oscillations is characterized in detail as a function of axial swirler location, oscillation frequency, and mean nozzle velocity. We show that both the frequency and the intensity of self-excited instabilities in a model gas turbine combustor are correlated with axial swirler position, which indicates that a vorticity wave generated at the swirl vanes is a primary source of convective disturbances in the absence of equivalence ratio nonuniformities. Flame transfer function measurements confirm that the linear/nonlinear heat release response is a strong function of axial swirler location, even when unforced flame structures remain unchanged. The key parameter controlling this phenomenon is the phase difference between the azimuthal and acoustic velocity perturbations at the combustor dump plane; the phase difference is affected by swirler location, frequency, mean velocity, and the speed of sound. It was found that out-of-phase interference between azimuthal and acoustic velocity disturbances at the combustor inlet yields large flame angle fluctuations in relation to swirl number fluctuations, and therefore the formation of a coherent structure is hindered due to high kinematic viscosity within the vortex formation region. In-phase interference mechanisms, on the other hand, lead to high-amplitude limit cycle oscillations. This interference mechanism is then explored in the presence of temporal equivalence ratio nonuniformities, in which two different sources of convective mechanisms should be considered simultaneously in connection with acoustic velocity perturbations and the vortex dynamics. Results reveal that equivalence ratio oscillation has a significant effect on the strength of combustion-acoustic interactions. Strong self-excited instabilities of partially premixed flames are produced by in-phase interactions between acoustic velocity and equivalence ratio oscillations, which are governed by fuel injection location, frequency, mean nozzle velocity, and fuel injector impedance. At this phase condition, unburned reactants with high equivalence ratio impinge on the flame front with high inlet velocity, potentially causing large fluctuations of heat release rate.

Kyu Tae Kim; Dom A. Santavicca

2013-01-01T23:59:59.000Z

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141

Mass balance for \\{POPs\\} in a real scale fluidized bed combustor co-incinerating automotive shredder residue  

Science Journals Connector (OSTI)

The European directive 2000/53/EC implies a “reuse and recovery” rate for end-of-life vehicles (ELVs) of 95% to be reached by the year 2015. One of the options to increase the actual average European “reuse and recovery” rate of approximately 78% (EU 15, 2008) is incineration of automotive shredder residue (ASR) with energy-recovery. The mass balance and the congener fingerprints for PCDD/Fs, dioxin-like PCBs, \\{PCBs\\} and \\{PAHs\\} in a real scale fluidized bed combustor (FBC) incinerating 25% ASR with 25% refuse derived fuel (RDF) and 50% waste water treatment sludge (WWT sludge) were investigated. The PCDD/F, dioxin-like PCB, PCB and PAH concentrations in this input waste mix were more than hundred times higher than in the usual waste feed of the incinerator (30% RFD and 70% WWT sludge). In the outputs of the FBC, however, the concentrations of these POP groups were comparable or only slightly higher than in the outputs generated during the incineration of the usual waste feed. The considered \\{POPs\\} in the waste were destroyed efficiently and the formation of new \\{POPs\\} during cooling of the flue gas appeared to a large extent independent of the POP concentrations in the incinerated waste.

J. Van Caneghem; C. Block; I. Vermeulen; A. Van Brecht; P. Van Royen; M. Jaspers; G. Wauters; C. Vandecasteele

2010-01-01T23:59:59.000Z

142

Turbine combustor with fuel nozzles having inner and outer fuel circuits  

DOE Patents [OSTI]

A combustor cap assembly for a turbine engine includes a combustor cap and a plurality of fuel nozzles mounted on the combustor cap. One or more of the fuel nozzles would include two separate fuel circuits which are individually controllable. The combustor cap assembly would be controlled so that individual fuel circuits of the fuel nozzles are operated or deliberately shut off to provide for physical separation between the flow of fuel delivered by adjacent fuel nozzles and/or so that adjacent fuel nozzles operate at different pressure differentials. Operating a combustor cap assembly in this fashion helps to reduce or eliminate the generation of undesirable and potentially harmful noise.

Uhm, Jong Ho; Johnson, Thomas Edward; Kim, Kwanwoo

2013-12-24T23:59:59.000Z

143

Implications of diurnal and seasonal variations in renewable energy generation for large scale energy storage  

Science Journals Connector (OSTI)

Large scale implementation of solar and wind powered renewable electricity generation will use up to continent sized connected electricity grids built to distribute the locally fluctuating power. Systematic power output variation will then become manifest since solar power has an evident diurnal period but also surface winds—which are driven by surface temperatures—follow a diurnal periodic behavior lagging about 4 h in time. On an ordinary day a strong diurnal varying renewable electricity generation results when combining wind and solar power on such continent sized grid. Comparison with possible demand patterns indicates that coping with such systematically varying generation will require large scale renewable energy storage and conversion for timescales and storage capacities of at least up to half a day. Seasonal timescales for versatile high quality generally applicable energy conversion and storage are equally essential since the continent wide insolation varies a factor ?3 e.g. in Europe and Northern Africa together. A first order model for estimating required energy storage and conversion magnitudes is presented taking into account potential diurnal and seasonal energy demand and generation patterns. A few scalable energy storage methods are briefly indicated.

2014-01-01T23:59:59.000Z

144

Rayleigh/Raman/LIF measurements in a turbulent lean premixed combustor  

SciTech Connect (OSTI)

Much of the industrial electrical generation capability being added worldwide is gas-turbine engine based and is fueled by natural gas. These gas-turbine engines use lean premixed (LP) combustion to meet the strict NO{sub x} emission standards, while maintaining acceptable levels of CO. In conventional, diffusion flame gas turbine combustors, large amount of NO{sub x} forms in the hot stoichiometric zones via the Zeldovich (thermal) mechanism. Hence, lean premixed combustors are rapidly becoming the norm, since they are specifically designed to avoid these hot stoichiometric zones and the associated thermal NO{sub x}. However, considerable research and development are still required to reduce the NO{sub x} levels (25-40 ppmvd adjusted to 15% O{sub 2} with the current technology), to the projected goal of under 10 ppmvd by the turn of the century. Achieving this objective would require extensive experiments in LP natural gas (or CH{sub 4}) flames for understanding the combustion phenomena underlying the formation of the exhaust pollutants. Although LP combustion is an effective way to control NO{sub x}, the downside is that it increases the CO emissions. The formation and destruction of the pollutants (NO{sub x} and CO) are strongly affected by the fluid mechanics, the finite-rate chemistry, and their (turbulence-chemistry) interactions. Hence, a thorough understanding of these interactions is vital for controlling and reducing the pollutant emissions. The present research is contributing to this goal by providing a detailed nonintrusive laser based data set with good spatial and temporal resolutions of the pollutants (NO and CO) along with the major species, temperature, and OH. The measurements reported in this work, along with the existing velocity data on a turbulent LP combustor burning CH{sub 4}, would provide insight into the turbulence-chemistry interactions and their effect on pollutant formation.

Nandula, S.P.; Pitz, R.W. [Vanderbilt Univ., Nashville, TN (United States). Dept. of Mechanical Engineering; Barlow, R.S.; Fiechtner, G.J. [Sandia National Labs., Albuquerque, NM (United States)

1995-12-31T23:59:59.000Z

145

Corporate Energy Management: A Survey of Large Manufacturing Companies  

E-Print Network [OSTI]

Corporate practices regarding energy management vary substantially from one company to another. Some companies pay close attention to energy use throughout the corporation while others pay scant attention. This paper first describes what we call...

Norland, D. L.; Lind, L.

146

LARGE SCALE WIND CLIMATOLOGICAL EXAMINATIONS OF WIND ENERGY UTILIZATION  

E-Print Network [OSTI]

The aim of this article is to describe the particular field of climatology which analyzes air movement characteristics regarding utilization of wind for energy generation. The article describes features of wind energy potential available in Hungary compared to wind conditions in other areas of the northern quarter sphere in order to assist the wind energy use development in Hungary. Information on wind climate gives a solid basis for financial and economic decisions of stakeholders in the field of wind energy utilization.

Andrea Kircsi

147

CFD modeling of a gas turbine combustor from compressor exit to turbine inlet  

SciTech Connect (OSTI)

Gas turbine combustor CFD modeling has become an important combustor design tool in the past few years, but CFD models are generally limited to the flow field inside the combustor liner at the diffuser/combustor annulus region. Although strongly coupled in reality, the two regions have rarely been coupled in CFD modeling. A CFD calculation for a full model combustor from compressor diffuser exit to turbine inlet is described. The coupled model accomplishes the following two main objectives: (1) implicit description of flow splits and flow conditions for openings into the combustor liner, and (2) prediction of liner wall temperatures. Conjugate heat transfer with nonluminous gas radiation (appropriate for lean, low emission combustors) is utilized to predict wall temperatures compared to the conventional approach of predicting only near wall gas temperatures. Remaining difficult issues such as generating the grid, modeling swirler vane passages, and modeling effusion cooling are also discussed.

Crocker, D.S.; Nickolaus, D.; Smith, C.E. [CFD Research Corp., Huntsville, AL (United States)

1999-01-01T23:59:59.000Z

148

Large-scale Renewable Energy Projects (Larger than 10 MWs) | Department of  

Broader source: Energy.gov (indexed) [DOE]

Large-scale Renewable Energy Projects (Larger than 10 MWs) Large-scale Renewable Energy Projects (Larger than 10 MWs) Large-scale Renewable Energy Projects (Larger than 10 MWs) October 7, 2013 - 9:32am Addthis Renewable energy projects larger than 10 megawatts (MW) are complex and typically require private-sector financing. The Federal Energy Management Program (FEMP) developed a guide to help Federal agencies, and the developers and financiers that work with them, to successfully install these projects at Federal facilities. The Large-Scale Renewable Energy Guide: Developing Renewable Energy Projects Larger than 10 MWs at Federal Facilities: A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital provides a framework to allow the Federal Government, private developers, and financiers to work in a

149

Strategies to Finance Large-Scale Deployment of Renewable Energy Projects:  

Open Energy Info (EERE)

Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Agency/Company /Organization: International Energy Agency (IEA) Sector: Energy Focus Area: Renewable Energy Topics: Finance, Implementation, Policies/deployment programs Resource Type: Publications Website: iea-retd.org/archives/publications/finance-re Cost: Free Language: English Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Screenshot References: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach[1]

150

Role of large scale storage in a UK low carbon energy future Philipp Grunewalda  

E-Print Network [OSTI]

round trip efficiency, both compressed air energy storage and hydrogen storage could become potentialRole of large scale storage in a UK low carbon energy future Philipp Gr¨unewalda , Tim Cockerilla Large scale storage offers the prospect of using excess electricity within a low carbon energy system

151

Fluidized bed combustor and coal gun-tube assembly therefor  

DOE Patents [OSTI]

A coal supply gun assembly for a fluidized bed combustor which includes heat exchange elements extending above the bed's distributor plate assembly and in which the gun's nozzles are disposed relative to the heat exchange elements to only discharge granular coal material between adjacent heat exchange elements and in a path which is substantially equidistant from adjacent heat exchange elements.

Hosek, William S. (Mt. Tabor, NJ); Garruto, Edward J. (Wayne, NJ)

1984-01-01T23:59:59.000Z

152

Catalytic combustor for integrated gasification combined cycle power plant  

DOE Patents [OSTI]

A gasification power plant 10 includes a compressor 32 producing a compressed air flow 36, an air separation unit 22 producing a nitrogen flow 44, a gasifier 14 producing a primary fuel flow 28 and a secondary fuel source 60 providing a secondary fuel flow 62 The plant also includes a catalytic combustor 12 combining the nitrogen flow and a combustor portion 38 of the compressed air flow to form a diluted air flow 39 and combining at least one of the primary fuel flow and secondary fuel flow and a mixer portion 78 of the diluted air flow to produce a combustible mixture 80. A catalytic element 64 of the combustor 12 separately receives the combustible mixture and a backside cooling portion 84 of the diluted air flow and allows the mixture and the heated flow to produce a hot combustion gas 46 provided to a turbine 48. When fueled with the secondary fuel flow, nitrogen is not combined with the combustor portion.

Bachovchin, Dennis M. (Mauldin, SC); Lippert, Thomas E. (Murrysville, PA)

2008-12-16T23:59:59.000Z

153

Flame Dynamics and Structure Within Sub-Millimeter Combustors  

E-Print Network [OSTI]

provided by combusting hydro- carbon fuels has stimulated interest in recent years toward the development of micro-and mesoscale portable heat and power sources, and systems for a myriad of applications,1 of micro- and mesoscale heat sources through development of micro- combustors, engines, heaters

154

Lessons from Large-Scale Renewable Energy Integration Studies: Preprint  

SciTech Connect (OSTI)

In general, large-scale integration studies in Europe and the United States find that high penetrations of renewable generation are technically feasible with operational changes and increased access to transmission. This paper describes other key findings such as the need for fast markets, large balancing areas, system flexibility, and the use of advanced forecasting.

Bird, L.; Milligan, M.

2012-06-01T23:59:59.000Z

155

Large-Scale Hydropower Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

156

Large-Scale Hydropower Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

157

Large Scale Computing and Storage Requirements for High Energy...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Accelerator science and technology objectives for all applications * Achieve higher energy and intensity, faster and cheaper machine design, more reliable operation a wide...

158

Large-Eddy Simulation of a Supersonic Inlet-Isolator Heeseok Koo1  

E-Print Network [OSTI]

-mode scramjet engine that pro- vides stable compressed flow to the combustor. However, if the combustor scramjet engines. Here, the predictive capa- bility of the large eddy simulation (LES) methodology-mode scramjets provide a practical solution to hypersonic flight by operating at both low and high supersonic

Raman, Venkat

159

ITP Industrial Distributed Energy: Assessment of Large Combined...  

Broader source: Energy.gov (indexed) [DOE]

Summary Report: Assessment of Large Combined Heat and Power Market ORNL Subcontract 4000021456 Task 2 Submitted to: Oak Ridge National Laboratory P.O. Box 2008 1 Bethel Valley Road...

160

Large-Scale Residential Energy Efficiency Programs Based on CFLs | Open  

Open Energy Info (EERE)

Large-Scale Residential Energy Efficiency Programs Based on CFLs Large-Scale Residential Energy Efficiency Programs Based on CFLs Jump to: navigation, search Tool Summary Name: Large-Scale Residential Energy Efficiency Programs Based on CFLs Agency/Company /Organization: Energy Sector Management Assistance Program of the World Bank Sector: Energy Focus Area: Energy Efficiency, Buildings Topics: Implementation, Policies/deployment programs Website: www.esmap.org/filez/pubs/216201021421_CFL_Toolkit_Web_Version_021610_R References: Large-Scale Residential Energy Efficiency Programs Based on CFLs[1] Overview "The World Bank Group and its Energy Sector Management Assitance Progamme (ESMAP) have produced a toolkit for efficient lighting programmes, based on compact fluorescent lamps, that compiles and shares operational (design,

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Correction for energy of large nuclei in Brueckner's theory  

Science Journals Connector (OSTI)

The paper supplements the calculation of corrections giving the difference between the true energy of the atomic nucleus and its model, performed by various authors according to Brueckner's theory. It is seen tha...

A. Kujanová-Zentková

1963-01-01T23:59:59.000Z

162

Biomass Energy Heat Provision in Modern Large-Scale Systems  

Science Journals Connector (OSTI)

Biomass is the most important renewable energy source in the European Union. In the field of energetic utilization of solid biomass, combustion is the most advanced and market-proven application. Consequently...

Dr. Ingwald Obernberger…

2012-01-01T23:59:59.000Z

163

Biomass Energy Heat Provision in Modern Large-Scale Systems  

Science Journals Connector (OSTI)

Biomass is the most important renewable energy source in the European Union. In the field of energetic utilization of solid biomass, combustion is the most advanced and market-proven application. Consequently...

Dr. Ingwald Obernberger; Dr. Friedrich Biedermann

2013-01-01T23:59:59.000Z

164

Nevada Weatherizes Large-Scale Complex | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Nevada Weatherizes Large-Scale Complex Nevada Weatherizes Large-Scale Complex Nevada Weatherizes Large-Scale Complex July 1, 2010 - 10:11am Addthis What does this project do? This nonprofit weatherized a 22-unit low-income multifamily complex, reducing the building's duct leakage from 90 percent to just 5 percent. The weatherization program of the Rural Nevada Development Corporation (RNDC) reached a recent success in its eleven counties-wide territory. In June, the nonprofit finished weatherizing a 22-unit low-income multifamily complex, reducing the building's duct leakage from 90 percent to just 5 percent. "That is one big savings and is why I am proud of this project," says Dru Simerson, RNDC Weatherization Manager. RNDC's crew replaced all windows and 17 furnaces and installed floor

165

DeFrees Large Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Large Wave Basin Large Wave Basin Jump to: navigation, search Basic Specifications Facility Name DeFrees Large Wave Basin Overseeing Organization Cornell University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 32.0 Beam(m) 0.6 Depth(m) 0.9 Water Type Freshwater Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 64 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Computer controlled 4m hydraulic wave paddle stroke allows a series of solitary waves to be generated; arbitrary wave shape possible Wave Direction Uni-Directional Simulated Beach Yes

166

Low emissions combustor development for an industrial gas turbine to utilize LCV fuel gas  

SciTech Connect (OSTI)

Advanced coal-based power generation systems such as the British Coal Topping Cycle offer the potential for high-efficiency electricity generation with minimum environmental impact. An important component of the Topping cycle program is the gas turbine, for which development of a combustion system to burn low calorific value coal derived fuel gas, at a turbine inlet temperature of 1,260 C (2,300 F), with minimum pollutant emissions, is a key R and D issue. A phased combustor development program is underway burning low calorific value fuel gas (3.6--4.1 MJ/m[sup 3]) with low emissions, particularly NO[sub x] derived from fuel-bound nitrogen. The first phase of the combustor development program has now been completed using a generic tubo-annular, prototype combustor design. Tests were carried out at combustor loading and Mach numbers considerably greater than the initial design values. Combustor performance at these conditions was encouraging. The second phase of the program is currently in progress. This will assess, initially, an improved variant of the prototype combustor operating at conditions selected to represent a particular medium sized industrial gas turbine. This combustor will also be capable of operating using natural gas as an auxiliary fuel, to suite the start-up procedure for the Topping Cycle. The paper presents the Phase 1 test program results for the prototype combustor. Design of the modified combustor for Phase 2 of the development program is discussed, together with preliminary combustor performance results.

Kelsall, G.J.; Smith, M.A. (British Coal Corp., Glos (United Kingdom). Coal Research Establishment); Cannon, M.F. (European Gas Turbines Ltd., Lincoln (United Kingdom). Aero and Technology Products)

1994-07-01T23:59:59.000Z

167

Effects of large-scale distribution of wind energy in and around Europe  

E-Print Network [OSTI]

Effects of large-scale distribution of wind energy in and around Europe Gregor Giebel Niels Gylling energy in Europe? · Distribution of wind energy all over Europe leads to smoothing of the wind power energy can easily supply up to ~20% of the European demand. At this stage, · Less than 13% of the wind

168

Energy-Efficient Antenna Selection and Power Allocation for Large-Scale Multiple Antenna  

E-Print Network [OSTI]

the BS to harvest energy from renewable energy sources such as solar, wind, and so on, can effectivelyEnergy-Efficient Antenna Selection and Power Allocation for Large-Scale Multiple Antenna Systems with Hybrid Energy Supply Zhenyu Zhou1 , Sheng Zhou2 , Jie Gong2 , and Zhisheng Niu2 1 State Key Laboratory

169

Independent components in acoustic emission energy signals from large diesel engines  

E-Print Network [OSTI]

Independent components in acoustic emission energy signals from large diesel engines Niels Henrik-Sørensen et al. [5], to acoustic emission (AE) energy signals obtained from a large diesel engine acquired from the two stroke MAN B&W test bed engine in Copenhagen. The signals were sampled at 20 KHz

170

Understanding and Control of Combustion Dynamics in Gas Turbine Combustors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Control of Combustion Understanding and Control of Combustion Control of Combustion Understanding and Control of Combustion Dynamics in Gas Turbine Combustors Dynamics in Gas Turbine Combustors Georgia Institute of Technology Georgia Institute of Technology Ben T. Zinn, Tim Lieuwen, Yedidia Neumeier, and Ben Bellows SCIES Project 02-01-SR095 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (05/01/2002, 36 Month Duration) $452,695 Total Contract Value CLEMSONPRES.PPT, 10/28/2003, B.T. ZINN, T. LIEUWEN, Y. NEUMEIER Gas Turbine Need Gas Turbine Need * Need: Gas turbine reliability and availability is important factor affecting power plant economics - Problem: Combustion driven oscillations severely reduce part life, requiring substantially more frequent outages

171

Modeling scramjet combustor flowfields with a grid adaptation scheme  

SciTech Connect (OSTI)

The accurate description of flow features associated with the normal injection of fuel into supersonic primary flows is essential in the design of efficient engines for hypervelocity aerospace vehicles. The flow features in such injections are complex with multiple interactions between shocks and between shocks and boundary layers. Numerical studies of perpendicular sonic N2 injection and mixing in a Mach 3.8 scramjet combustor environment are discussed. A dynamic grid adaptation procedure based on the equilibration of spring-mass systems is employed to enhance the description of the complicated flow features. Numerical results are compared with experimental measurements and indicate that the adaptation procedure enhances the capability of the modeling procedure to describe the flow features associated with scramjet combustor components. 14 refs.

Ramakrishnan, R.; Singh, D.J. (Analytical Services and Materials, Inc., Hampton, VA (United States))

1994-05-01T23:59:59.000Z

172

Self-regulating fuel staging port for turbine combustor  

DOE Patents [OSTI]

A port (60) for axially staging fuel and air into a combustion gas flow path 28 of a turbine combustor (10A). A port enclosure (63) forms an air path through a combustor wall (30). Fuel injectors (64) in the enclosure provide convergent fuel streams (72) that oppose each other, thus converting velocity pressure to static pressure. This forms a flow stagnation zone (74) that acts as a valve on airflow (40, 41) through the port, in which the air outflow (41) is inversely proportion to the fuel flow (25). The fuel flow rate is controlled (65) in proportion to engine load. At high loads, more fuel and less air flow through the port, making more air available to the premixing assemblies (36).

Van Nieuwenhuizen, William F.; Fox, Timothy A.; Williams, Steven

2014-07-08T23:59:59.000Z

173

System and method for reducing combustion dynamics in a combustor  

DOE Patents [OSTI]

A system for reducing combustion dynamics in a combustor includes an end cap having an upstream surface axially separated from a downstream surface, and tube bundles extend through the end cap. A diluent supply in fluid communication with the end cap provides diluent flow to the end cap. Diluent distributors circumferentially arranged inside at least one tube bundle extend downstream from the downstream surface and provide fluid communication for the diluent flow through the end cap. A method for reducing combustion dynamics in a combustor includes flowing fuel through tube bundles that extend axially through an end cap, flowing a diluent through diluent distributors into a combustion chamber, wherein the diluent distributors are circumferentially arranged inside at least one tube bundle and each diluent distributor extends downstream from the end cap, and forming a diluent barrier in the combustion chamber between at least one pair of adjacent tube bundles.

Uhm, Jong Ho; Johnson, Thomas Edward; Zuo, Baifang; York, William David

2013-08-20T23:59:59.000Z

174

Pulsed atmospheric fluidized bed combustor apparatus and process  

DOE Patents [OSTI]

A pulsed atmospheric fluidized bed reactor system is disclosed and claimed along with a process for utilization of same for the combustion of, e.g. high sulfur content coal. The system affords a economical, ecologically acceptable alternative to oil and gas fired combustors. The apparatus may also be employed for endothermic reaction, combustion of waste products, e.g. organic and medical waste, drying, calcining and the like.

Mansour, Momtaz N. (Columbia, MD)

1992-01-01T23:59:59.000Z

175

U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

U.S. Signs U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion Energy Project to Begin Construction News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.21.06 U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion Energy Project to Begin Construction Print Text Size: A A A Subscribe FeedbackShare Page Large-Scale, Clean Fusion Energy Project to Begin Construction November 21, 2006 PARIS, FRANCE - Representing the United States, Dr. Raymond L. Orbach, Under Secretary for Science of the U.S. Department of Energy (DOE), today joined counterparts from China, the European Union, India, Japan, the

176

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE-SCALE THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE- SCALE THERMAL ENERGY STORAGE Miroslaw storage performance. The expected immediate outcome of this effort is the demonstration of high-energy generation at high efficiency could revolutionize the development of solar energy. Nanoparticle-based phase

Pennycook, Steve

177

Funding for Large-Scale Sustainable Energy Projects Combining Expert Opinions to Support Decisions  

E-Print Network [OSTI]

Funding for Large-Scale Sustainable Energy Projects Combining Expert Opinions to Support Decisions for a sustainable energy future? Three teams, UMass, Harvard, and FEEM (Fondazione Eni Enrico Mattei), share a goal technologies to fund for optimal success for a sustainable energy future. Progress and Results · Created models

Mountziaris, T. J.

178

The WiggleZ Dark Energy Survey: the transition to large-scale cosmic homogeneity  

Science Journals Connector (OSTI)

......research-article Articles The WiggleZ Dark Energy Survey: the transition to large-scale...this work, we use the WiggleZ Dark Energy Survey (Drinkwater et al. ) to make...THE WiggleZ SURVEY The WiggleZ Dark Energy Survey (Drinkwater et al. ) is a......

Morag I. Scrimgeour; Tamara Davis; Chris Blake; J. Berian James; Gregory B. Poole; Lister Staveley-Smith; Sarah Brough; Matthew Colless; Carlos Contreras; Warrick Couch; Scott Croom; Darren Croton; Michael J. Drinkwater; Karl Forster; David Gilbank; Mike Gladders; Karl Glazebrook; Ben Jelliffe; Russell J. Jurek; I-hui Li; Barry Madore; D. Christopher Martin; Kevin Pimbblet; Michael Pracy; Rob Sharp; Emily Wisnioski; David Woods; Ted K. Wyder; H. K. C. Yee

2012-09-01T23:59:59.000Z

179

Data Analysis and Modeling of Lighting Energy Use in Large Office Buildings  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Data Analysis and Modeling of Lighting Energy Use in Large Office Buildings Data Analysis and Modeling of Lighting Energy Use in Large Office Buildings Title Data Analysis and Modeling of Lighting Energy Use in Large Office Buildings Publication Type Conference Paper Year of Publication 2013 Authors Zhou, Xin, Da Yan, Xiaoxin Ren, and Tianzhen Hong Keywords building simulation, energy use, lighting, modeling, occupant beh building, occupant beh building simulation, occupant behbuilding simulation Abstract Lighting consumes about 20 to 40% of total electricity use in large office buildings in the U.S. and China. In order to develop better lighting simulation models it is crucial to understand the characteristics of lighting energy use. This paper analyzes the main characteristics of lighting energy use over various time scales, based on the statistical analysis of measured lighting energy use of 17 large office buildings in Beijing and Hong Kong. It was found that the daily 24-hour variations of lighting energy use were mainly driven by the schedule of the building occupants. Outdoor illumination levels have little impact on lighting energy use in large office buildings due to the lack of automatic daylighting controls and relatively small perimeter areas. A stochastic lighting energy use model was developed based on different occupant activities during six time periods throughout a day, and the annual distribution of lighting power across those periods. The model was verified using measured lighting energy use of one selected building. This study demonstrates how statistical analysis and stochastic modeling can be applied to lighting energy use. The developed lighting model can be adopted by building energy modeling programs to improve the simulation accuracy of lighting energy use.

180

E-Print Network 3.0 - american ref-fuel waste-to-energy Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research and Technology Council (WTERT) Collection: Renewable Energy 50 Leaching of Dioxins from Municipal Waste Combustor Residues Summary: 12, 12th North American...

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

E-Print Network 3.0 - american waste-to-energy conference Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research and Technology Council (WTERT) Collection: Renewable Energy 20 Leaching of Dioxins from Municipal Waste Combustor Residues Summary: 12, 12th North American...

182

Catalytic Combustor for Fuel-Flexible Turbine  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Rev. 1 Rev. 1 October 2004 through March 2005 for U.S. Department of Energy Office of Fossil Energy National Energy Technology Laboratory 3610 Collins Ferry Road Morgantown, West Virginia 26507-0880 Prepared by W. R. Laster (407)736-5796 Siemens Westinghouse Power Corporation 4400 Alafaya Trail Orlando, FL 32826-2399 i DISCLAIMER "This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would

183

Numerical simulation of the two-dimensional flow in high pressure catalytic combustor for gas turbine  

Science Journals Connector (OSTI)

The objective of this paper is modeling the mechanism of high pressure and high temperature catalytic oxidation of natural gas, or methane. The model is two-dimensional steady-state, and includes axial and radial convection and diffusion of mass, momentum and energy, as well as homogeneous (gas phase) and heterogeneous (gas surface) single step irreversible chemical reactions within a catalyst channel. Experimental investigations were also made of natural gas, or methane combustion in the presence of Mn-substituted hexaaluminate catalysts. Axial profiles of catalyst wall temperature, and gas temperature and gas composition for a range of gas turbine combustor operating conditions have been obtained for comparison with and development of a computer model of catalytic combustion. Numerical calculation results for atmospheric pressure agree well with experimental data. The calculations have been extended for high pressure (10 atm) operating conditions of gas turbine.

Y. Tsujikawa; S. Fujii; H. Sadamori; S. Ito; S. Katsura

1995-01-01T23:59:59.000Z

184

NETL: Oxy-Fired Pressurized Fluidized Bed Combustor (Oxy-PFBC)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Optimization of Pressurized Oxy-Combustion with Flameless Reactor Optimization of Pressurized Oxy-Combustion with Flameless Reactor Project No.: DE-FE0009478 Unity Power Alliance (UPA), a joint venture between the Italian company ITEA and ThermoEnergy Corp, is investigating the optimization of pressurized oxy-combustion with a flameless reactor. They will develop a basis for modeling conditions in a flameless reactor and inlet conditions for a heat recovery steam generator. A range of cycles will be evaluated at varying operating pressures to assess the effectiveness of heat recovery by vapor condensation; the optimum size and design of the combustor and the pressure drop in the recirculation pipes; and various purities of oxygen to determine how the variations affect the operation and performance of the air separation unit, the CO2 separation system, and the oxy-combustion process.

185

Analysis Methodology for Large Organizations' Investments in Energy Retrofit of Buildings  

E-Print Network [OSTI]

This paper presents a formal methodology that supports large organizations' investments in energy retrofit of buildings. The methodology is a scalable modeling approach based on normative models and Bayesian calibration. Normative models are a light...

Heo, Y.; Augenbroe, G.

2011-01-01T23:59:59.000Z

186

FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects  

Office of Energy Efficiency and Renewable Energy (EERE)

FEMP developed a guide to help federal agencies, as well as the developers and financiers that work with them, to successfully install large-scale renewable energy projects at federal facilities.

187

Energy Management Using Storage Batteries in Large Commercial Facilities Based on Projection of Power Demand  

Science Journals Connector (OSTI)

This study provides three methods for projection of power demand of large commercial facilities planned for construction, ... the operation algorithm of storage batteries to manage energy and minimize power costs...

Kentaro Kaji; Jing Zhang; Kenji Tanaka

2013-01-01T23:59:59.000Z

188

Technical Support Document: Strategies for 50% Energy Savings in Large Office Buildings  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

9213 9213 September 2010 Technical Support Document: Strategies for 50% Energy Savings in Large Office Buildings Matthew Leach, Chad Lobato, Adam Hirsch, Shanti Pless, and Paul Torcellini National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36-08-GO28308 Technical Report NREL/TP-550-49213 September 2010 Technical Support Document: Strategies for 50% Energy Savings in Large Office Buildings Matthew Leach, Chad Lobato, Adam Hirsch, Shanti Pless, and Paul Torcellini Prepared under Task No. BEC7.1309 NOTICE

189

DATA ANALYSIS AND MODELING OF LIGHTING ENERGY USE IN LARGE OFFICE BUILDINGS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DATA ANALYSIS AND MODELING OF LIGHTING ENERGY USE IN DATA ANALYSIS AND MODELING OF LIGHTING ENERGY USE IN LARGE OFFICE BUILDINGS Xin Zhou 1 , Da Yan 1, , Xiaoxin Ren 1 , Tianzhen Hong 2 1 Department of Building Science, School of Architecture, Tsinghua University, Beijing, China 2 Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA ABSTRACT Lighting consumes about 20 to 40% of total electricity use in large office buildings in the U.S. and China. In order to develop better lighting simulation models it is crucial to understand the characteristics of lighting energy use. This paper analyzes the main characteristics of lighting energy use over various time scales, based on the statistical analysis of measured lighting energy use of 17 large office buildings in Beijing and Hong Kong. It was found that the daily 24-hour

190

Reuse of Fly Ash from a Fluidized Bed Combustor for Sulfur Uptake:? The Role of Ettringite in Hydration-Induced Reactivation  

Science Journals Connector (OSTI)

Reuse of Fly Ash from a Fluidized Bed Combustor for Sulfur Uptake:? The Role of Ettringite in Hydration-Induced Reactivation ... It was found that ettringite was extensively produced during water hydration and that effective enhancement of the sulfur uptake ability of the fly ash was achieved. ... The very favorable performance of reactivated ash as a sulfur sorbent was mostly related to the large amount of free lime formed during thermal decomposition of ettringite. ...

Fabio Montagnaro; Piero Salatino; Graziella Bernardo; Antonio Telesca; Gian Lorenzo Valenti

2005-07-23T23:59:59.000Z

191

Alternative large-N limit for QCD and its implications for low-energy nuclear phenomena  

Science Journals Connector (OSTI)

The Corrigan-Ramond model for large-N QCD is analyzed in detail. The spectrum, leading-order results for interactions, and an effective Lagrangian describing large-N interactions are derived. This Lagrangian, when quantized, provides an effective quantum field theory for mesons and baryons. The applicability of such a theory to low-energy nuclear phenomena is studied. The model has features that distinguish it clearly from standard large-N QCD.

Elias B. Kiritsis and Joannis Papavassiliou

1990-12-15T23:59:59.000Z

192

Micro Catalytic Combustor with Pd/Nano-porous Alumina for High-Temperature Application  

E-Print Network [OSTI]

, the mixture temperature at the combustor inlet is set to 630 o C. Thermal conductivity of the ceramic wall Keywords: Catalytic combustion, Pd/nano-porous alumina, Ceramic tape casting, Thermophotovoltaic Abstract: A micro-scale catalytic combustor using high-precision ceramic tape-casting technology has been developed

Kasagi, Nobuhide

193

Test results of low NO[sub x] catalytic combustors for gas turbines  

SciTech Connect (OSTI)

Catalytic combustion is an ultralow NO[sub x] combustion method, so it is expected that this method will be applied to a gas turbine combustor, However, it is difficult to develop a catalytic combustor because catalytic reliability at high temperature is still insufficient. To overcome this difficulty, the authors designed a catalytic combustor in which premixed combustion was combined. By this device, it is possible to obtain combustion gas at a combustion temperature of 1,300 C while keeping the catalytic temperature below 1,000 C. After performing preliminary tests using LPG, the authors designed two types of combustor for natural gas with a capacity equivalent to one combustor used in a 20 MW class multican-type gas turbine. Combustion tests were conducted at atmospheric pressure using natural gas. As a result, it was confirmed that a combustor in which catalytic combustor segments were arranged alternately with premixing nozzles could achieve low NO[sub x] and high combustion efficiency in the range from 1,000 C to 1,300 C of the combustor exit gas temperature.

Ozawa, Y.; Hirano, J.; Sato, M. (Central Research Inst. of Electric Power Industry, Kanagawa (Japan)); Saiga, M.; Watanabe, S. (Kansai Electric Power Co., Inc., Hyogo (Japan))

1994-07-01T23:59:59.000Z

194

Test results of a catalytically assisted combustor for a gas turbine  

Science Journals Connector (OSTI)

A catalytically assisted ceramic combustor for a gas turbine was designed and tested to achieve low \\{NOx\\} emissions. This combustor is composed of a burner and a ceramic liner. The burner consists of an annular preburner, six catalytic combustor segments and six premixing nozzles, which are arranged in parallel and alternately. In this combustor system, catalytic combustion temperature is controlled under 1000 °C, premixed gas is injected from the premixing nozzles to the catalytic combustion gas and lean premixed combustion over 1300 °C is carried out in the ceramic liner. This system was designed to avoid catalyst deactivation at high temperature and thermal shock fracture of the ceramic honeycomb monolith of the catalyst. A 1 MW class combustor was tested using LNG fuel. Firstly, \\{NOx\\} emissions from the preburner were investigated under various pressure conditions. Secondly, two sets of honeycomb cell density catalysts and one set of thermally pretreated catalysts ware applied to the combustor, and combustion tests were carried out under various pressure conditions. As a result, it was found that the main source of \\{NOx\\} was the preburner, and total \\{NOx\\} emissions from the combustor were approximately 4 ppm (at 16% O2) at an adiabatic combustion temperature of 1350 °C and combustor inlet pressure of 1.33 MPa.

Yasushi Ozawa; Yoshihisa Tochihara; Noriyuki Mori; Isao Yuri; Junichi Sato; Koji Kagawa

2003-01-01T23:59:59.000Z

195

LES-based Eulerian PDF approach for the simulation of scramjet combustors  

E-Print Network [OSTI]

LES-based Eulerian PDF approach for the simulation of scramjet combustors Heeseok Koo , Pratik simulation (LES) based simulation of scramjets is developed. To solve the high- dimensional joint of moments (SeQMOM); Probability density function; Scramjet combustor; Oscillatory reactive motion 1

Raman, Venkat

196

COMPUTATIONAL SIMULATION OF SCRAMJET COMBUSTORS - A COMPARISON BETWEEN QUASI-ONE DIMENSIONAL AND 2-D NUMERICAL SIMULATIONS  

E-Print Network [OSTI]

combustors. The combustor configurations at DLR and NASA's SCHOLAR Supersonic Combustor have been used as test cases for the 1-D and 2-D simulations. Comparisons between the published 3-D computational and experimental results and quasi-one-dimensional and 2...

Tourani, Chandraprakash Chandra

2011-01-26T23:59:59.000Z

197

Energy Distribution at Large Angles of High-Energy Electrons in Bremsstrahlung  

Science Journals Connector (OSTI)

The energy distribution of high-energy electrons, that have been scattered by the nuclear potential and have lost energy by bremsstrahlung, has been investigated. It has been found that there is a peak in the energy distribution which occurs at energies of the order of mc2. The nature of and reasons for the peak are discussed. Formulas for the energy distribution near the peak and for the area under the peak are given. Similar results apply also to pair production.

David G. Keiffer and George Parzen

1956-02-15T23:59:59.000Z

198

Development of a topping combustor for advanced concept pressurized fluidized-bed combustion systems  

SciTech Connect (OSTI)

A project team consisting of Foster Wheeler Development Corporation, Westinghouse Electric Corporation, Gilbert/Commonwealth and the Institute of Gas Technology, are developing a Second Generation Pressurized Fluidized Bed System. Foster Wheeler is developing a carbonizer (a partial gasifier) and a pressurized fluidized bed combustor. Both these units operate at a nominal 1600{degrees}F (870{degrees}C) for optimal sulfur capture. Since this temperature is well below the current combustion turbine combustor outlet operating temperature of 2350{degrees}F (1290{degrees}C), to reach commercialization, a topping combustor and hot gas cleanup (HGCU) equipment must be developed. Westinghouse`s efforts are focused on the development of the high temperature gas cleanup equipment and the topping combustor. This paper concentrates on the design and test of the topping combustor, which must use a low heating value syngas from the carbonizer at approximately 1600{degrees}F and 150 to 210 psi.

Domeracki, W.F.; Dowdy, T.E.; Bachovchin, D.

1995-11-01T23:59:59.000Z

199

Plasma molding over surface topography: Energy and angular distribution of ions extracted out of large holes  

E-Print Network [OSTI]

Plasma molding over surface topography: Energy and angular distribution of ions extracted out of large holes Chang-Koo Kim and Demetre J. Economoua) Plasma Processing Laboratory, Department of Chemical November 2001 Plasma molding over surface topography was investigated by measuring the energy and angular

Economou, Demetre J.

200

Refractory experience in circulating fluidized bed combustors, Task 7  

SciTech Connect (OSTI)

This report describes the results of an investigation into the status of the design and selection of refractory materials for coal-fueled circulating fluidized-bed combustors. The survey concentrated on operating units in the United States manufactured by six different boiler vendors: Babcock and Wilcox, Combustion Engineering, Foster Wheeler, Keeler Dorr-Oliver, Pyropower, and Riley Stoker. Information was obtained from the boiler vendors, refractory suppliers and installers, and the owners/operators of over forty units. This work is in support of DOE's Clean Coal Technology program, which includes circulating fluidized-bed technology as one of the selected concepts being evaluated.

Vincent, R.Q.

1989-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Thermionic-combustor combined-cycle system. Volume III. A thermionic converter design for gas-turbine combined-cycle systems  

SciTech Connect (OSTI)

Thermionic converter design is strongly influenced by the configuration of the heat source and heat sink. These two externally imposed conditions are of major importance in arriving at a viable converter design. In addition to these two factors, the economical and reliable transfer of energy internally within the converter is another major item in the design. The effects of the engineering trade-offs made in arriving at the design chosen for the Gas Turbine Combined Cycle combustor are reviewed.

Fitzpatrick, G.O.; Britt, E.J.; Dick, R.S. Jr.

1981-05-01T23:59:59.000Z

202

Energy Department Awards $66.7 Million for Large-Scale Carbon Sequestration  

Broader source: Energy.gov (indexed) [DOE]

66.7 Million for Large-Scale Carbon 66.7 Million for Large-Scale Carbon Sequestration Project Energy Department Awards $66.7 Million for Large-Scale Carbon Sequestration Project December 18, 2007 - 4:58pm Addthis Regional Partner to Demonstrate Safe and Permanent Storage of One Million Tons of CO2 at Illinois Site WASHINGTON, DC - Following closely on the heels of three recent awards through the Department of Energy's (DOE) Regional Carbon Sequestration Partnership Program, DOE today awarded $66.7 million to the Midwest Geological Sequestration Consortium (MGSC) for the Department's fourth large-scale carbon sequestration project. The Partnership led by the Illinois State Geological Survey will conduct large volume tests in the Illinois Basin to demonstrate the ability of a geologic formation to

203

Performance analysis of co-firing waste materials in an advanced pressurized fluidized-bed combustor  

SciTech Connect (OSTI)

The co-firing of waste materials with coal in utility scale power plants has emerged as an effective approach to produce energy and manage municipal wastes. Leading this approach is the atmospheric fluidized-bed combustor (AFBC). It has demonstrated its commercial acceptance in the utility market as a reliable source of power by burning a variety of waste and alternative fuels. The application of pressurized fluidized-bed combustor (PFBC) technology, although relatively new, can provide significant enhancements to the efficient production of electricity while maintaining the waste management benefits of AFBC. A study was undertaken to investigate the technical and economical feasibility of co-firing a PFBC with coal and municipal and industrial wastes. Focus was placed on the production of electricity and the efficient disposal of wastes for application in central power station and distributed locations. Issues concerning waste material preparation and feed, PFBC operation, plant emissions, and regulations are addressed. The results and conclusions developed are generally applicable to current and advanced PFBC design concepts. Wastes considered for co-firing include municipal solid waste (MSW), sewage sludge, and industrial de-inking sludge. Conceptual designs of two power plants rated at 250 MWe and 150 MWe were developed. Heat and material balances were completed for each plant along with environmental issues. With the PFBC`s operation at high temperature and pressure, efforts were centered on defining feeding systems capable of operating at these conditions. Air emissions and solid wastes were characterized to assess the environmental performance comparing them to state and Federal regulations. This paper describes the results of this investigation, presents conclusions on the key issues, and provides recommendations for further evaluation.

Bonk, D.L.; McDaniel, H.M. [USDOE Morgantown Energy Technology Center, WV (United States); DeLallo, M.R. Jr.; Zaharchuk, R. [Gilbert/Commonwealth, Inc., Reading, PA (United States)

1995-07-01T23:59:59.000Z

204

The Energy DataBus: NREL's Open-Source Application for Large-Scale Energy Data Collection and Analysis  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

NREL’s Energy DataBus is used for tracking and analyzing energy use on its own campus. The system is applicable to other facilities—including anything from a single building to a large military base or college campus—or for other energy data management needs. Managing and minimizing energy consumption on a large campus is usually a difficult task for facility managers: There may be hundreds of energy meters spread across a campus, and the meter data are often recorded by hand. Even when data are captured electronically, there may be measurement issues or time periods that may not coincide. Making sense of this limited and often confusing data can be a challenge that makes the assessment of building performance a struggle for many facility managers. The Energy DataBus software was developed by NREL to address these issues on its own campus, but with an eye toward offering its software solutions to other facilities. Key features include the software's ability to store large amounts of data collected at high frequencies—NREL collects some of its energy data every second—and rich functionality to integrate this wide variety of data into a single database [copied from http://en.openei.org/wiki/NREL_Energy_DataBus].

205

Combustion and direct energy conversion in a micro-combustor  

E-Print Network [OSTI]

The push toward the miniaturization of electromechanical devices and the resulting need for micro-power generation (milliwatts to watts) with low-weight, long-life devices has led to the recent development of the field of micro-scale combustion...

Lei, Yafeng

2006-10-30T23:59:59.000Z

206

AN ENERGY COST OPTIMIZATION METHOD FOR A LARGE SCALE HYBRID CENTRAL COOLING PLANT WITH MULTIPLE ENERGY SOURCES UNDER A COMPLEX ELECTRICITY COST STRUCTURE.  

E-Print Network [OSTI]

??The cooling energy cost could be a significant portion of the total energy cost for a large organization or building complex during summer. A hybrid… (more)

Guo, Yin

2012-01-01T23:59:59.000Z

207

Technical Support Document: Strategies for 50% Energy Savings in Large Office Buildings  

SciTech Connect (OSTI)

This Technical Support Document (TSD) documents technical analysis that informs design guidance for designing and constructing large office buildings that achieve 50% net site energy savings over baseline buildings defined by minimal compliance with respect to ANSI/ASHRAE/IESNA Standard 90.1-2004. This report also represents a step toward developing a methodology for using energy modeling in the design process to achieve aggressive energy savings targets. This report documents the modeling and analysis methods used to identify design recommendations for six climate zones that capture the range of U.S. climate variability; demonstrates how energy savings change between ASHRAE Standard 90.1-2007 and Standard 90.1-2004 to determine baseline energy use; uses a four-story 'low-rise' prototype to analyze the effect of building aspect ratio on energy use intensity; explores comparisons between baseline and low-energy building energy use for alternate energy metrics (net source energy, energy emissions, and energy cost); and examines the extent to which glass curtain construction limits achieve energy savings by using a 12-story 'high-rise' prototype.

Leach, M.; Lobato, C.; Hirsch, A.; Pless, S.; Torcellini, P.

2010-09-01T23:59:59.000Z

208

Survey of Climate Conditions for Demonstration of a Large Scale of Solar Energy Heating in Xi'an  

E-Print Network [OSTI]

-scale solar energy heating applications in urban residential buildings. In this paper, Xi'an's geographical situation and climate conditions are fully analyzed. The survey on solar energy resources, and the feasibility of solar energy heating on a large scale...

Li, A.; Liu, Y.

2006-01-01T23:59:59.000Z

209

Clean Energy Solutions Large Scale CHP and Fuel Cells Program | Department  

Broader source: Energy.gov (indexed) [DOE]

Clean Energy Solutions Large Scale CHP and Fuel Cells Program Clean Energy Solutions Large Scale CHP and Fuel Cells Program Clean Energy Solutions Large Scale CHP and Fuel Cells Program < Back Eligibility Commercial Fed. Government Industrial Institutional Local Government Nonprofit State Government Savings Category Commercial Heating & Cooling Manufacturing Buying & Making Electricity Alternative Fuel Vehicles Hydrogen & Fuel Cells Maximum Rebate CHP: $3,000,000 or 30% of project costs Fuel Cells: $3,000,000 or 45% of project costs Program Info Start Date 01/17/2013 State New Jersey Program Type State Grant Program Rebate Amount CHP greater than 1 MW-3 MW: $0.55/wattt CHP > 3 MW: $0.35/watt Fuel Cells > 1 MW with waste heat utilization: $2.00/watt Fuel Cells > 1 MW without waste heat utilization: $1.50/watt

210

New Hampshire Electric Co-Op - Large Business Energy Solutions | Department  

Broader source: Energy.gov (indexed) [DOE]

New Hampshire Electric Co-Op - Large Business Energy Solutions New Hampshire Electric Co-Op - Large Business Energy Solutions New Hampshire Electric Co-Op - Large Business Energy Solutions < Back Eligibility Commercial Industrial Savings Category Manufacturing Other Appliances & Electronics Commercial Lighting Lighting Program Info State New Hampshire Program Type Utility Rebate Program Rebate Amount Air Compressors: $120 - $200/HP Additional Compressed Air Storage: $2.75/gallon LED Traffic Light: $60 - 80/unit Light Fixtures: $10 - $150/unit Lighting Controls: $25 - $50/unit Motors (Open Drip Proof): $75 - $2,110 Motors (Totally Enclosed Fan Cooled: $85 - $3,295 ECM Motors: $75/unit Variable Speed Drives: $1,050 - $4,400 Custom: lesser of 35% of the total installed cost or buy down to 1 year pay Provider New Hampshire Electric Co-Op

211

Large N Free Energy of 3d N=4 SCFTs and AdS/CFT  

E-Print Network [OSTI]

We provide a non-trivial check of the AdS_4/CFT_3 correspondence recently proposed in arXiv:1106.4253 by verifying the GKPW relation in the large N limit. The CFT free energy is obtained from the previous works (arXiv:1105.2551, arXiv:1105.4390) on the S^3 partition function for 3-dimensional N=4 SCFT T[SU(N)]. This is matched with the computation of the type IIB action on the corresponding gravity background. We unexpectedly find that the leading behavior of the free energy at large N is 1/2 N^2 ln N. We also extend our results to richer theories and argue that 1/2 N^2 ln N is the maximal free energy at large N in this class of gauge theories.

Benjamin Assel; John Estes; Masahito Yamazaki

2012-06-13T23:59:59.000Z

212

High pressure test results of a catalytically assisted ceramic combustor for a gas turbine  

SciTech Connect (OSTI)

A catalytically assisted ceramic combustor for a gas turbine was designed to achieve low NOx emission under 5 ppm at a combustor outlet temperature over 1300 C. This combustor is composed of a burner system and a ceramic liner behind the burner system. The burner system consist of 6 catalytic combustor segments and 6 premixing nozzles, which are arranged in parallel and alternately. The ceramic liner is made up of the layer of outer metal wall, ceramic fiber, and inner ceramic tiles. Fuel flow rates for the catalysts and the premixing nozzles are controlled independently. Catalytic combustion temperature is controlled under 1000 C, premixed gas is injected from the premixing nozzles to the catalytic combustion gas and lean premixed combustion over 1300 C is carried out in the ceramic liner. This system was designed to avoid catalytic deactivation at high temperature and thermal and mechanical shock fracture of the honeycomb monolith of catalyst. A combustor for a 10 MW class, multican type gas turbine was tested under high pressure conditions using LNG fuel. Measurements of emission, temperature, etc. were made to evaluate combustor performance under various combustion temperatures and pressures. This paper presents the design features and the test results of this combustor.

Ozawa, Y.; Tochihara, Y.; Mori, N.; Yuri, I. [Central Research Inst. of Electric Power Industry, Yokosuka, Kanagawa (Japan); Kanazawa, T.; Sagimori, K. [Kansai Electric Power Co., Inc., Amagasaki, Hyogo (Japan)

1999-07-01T23:59:59.000Z

213

Best Practices and Tools for Large-scale Deployment of Renewable Energy and  

Open Energy Info (EERE)

Best Practices and Tools for Large-scale Deployment of Renewable Energy and Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques in ESCWA Agency/Company /Organization: United Nations Economic and Social Commission for Western Asia Focus Area: Energy Efficiency, Renewable Energy, Solar, Wind Topics: Implementation, Policies/deployment programs, Background analysis Resource Type: Lessons learned/best practices Website: www.escwa.un.org/information/publications/edit/upload/sdpd-09-TP3.pdf Country: Bahrain, Egypt, Iraq, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Sudan, Syria, United Arab Emirates, Yemen UN Region: "Western Asia & North Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property.

214

Imaging large vessels using cosmic-ray muon energy-loss techniques  

Science Journals Connector (OSTI)

Imaging the internal structure of large vessels (2–20 m in diameter) is not possible with most traditional imaging methods. The sheer size renders gamma-ray and other high-energy photon, neutron, electrical and acoustic techniques useless, whilst the use of high-energy accelerators required to produce charged-particles of sufficient energy are impractical in most industrial situations. The use of naturally occurring high-energy (?GeV) cosmic-ray mu-mesons (muons) provides an effective solution to the penetration problem. The problems of low intensity at near-horizontal angles with the cosmic-ray muon flux are addressed by using energy-loss imaging methods. In other methodologies, using charge-particle energy-loss imaging techniques, only a few events are needed compared to many thousands required if attenuation measurements were to be employed. The energies of horizontal cosmic-ray muons are distributed largely between 0.1 and 1000 GeV with a mean energy of about 50 GeV. Radiation Transport Monte-Carlo methods (GEANT4) have been used to calculate the energy loss for a selection of industrial materials in the energy range of interest. The energy loss of the muons along a ray-sum are modelled and compared to attenuation losses along the ray-sum using energy resolving detectors in coincidence before and after the sample. The energy-loss spectra across different samples are measured, demonstrating that embedded materials can be identified with as few as 10 muons passing through the sample. It is proposed that the imaging modality can be extended into a full tomographic modality allowing material identification within each voxel.

P.M. Jenneson; W.B. Gilboy; S.J.R. Simons; S.J. Stanley; D. Rhodes

2007-01-01T23:59:59.000Z

215

Computer Energy Modeling Techniques for Simulation Large Scale Correctional Institutes in Texas  

E-Print Network [OSTI]

for large facilities with multiple buildings, however, has been relatively rare. Due to the immense size of certain facilities such as college campuses and correctional institutes, simulating energy consumption for the entire campus and reporting... Office Building", Oak Ridge National Laboratory, OFWL Report No. ORNLICON-363, Oak Ridge, TN. SAS Institute, Inc. 1990. "SASISTAT User's Guide", Cary, NC, Ver. 6,4th ed., Vol. 2. Torres-Nunci, N. 1989. "Simulation Modeling Energy Consumption...

Heneghan, T.; Haberl, J. S.; Saman, N.; Bou-Saada, T. E.

1996-01-01T23:59:59.000Z

216

Reducing Data Center Loads for a Large-scale, Low Energy Office Building: NREL's Research Support Facility (Book), NREL (National Renewable Energy Laboratory)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Data Center Loads for a Large- Data Center Loads for a Large- scale, Low-energy Office Building: NREL's Research Support Facility The NREL Approach * December 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. 2 National Renewable Energy Laboratory Reducing Data Center Loads for a Large-Scale, Low-Energy Office Building: NREL's Research Support Facility Michael Sheppy, Chad Lobato, Otto Van Geet, Shanti Pless, Kevin Donovan, Chuck Powers National Renewable Energy Laboratory Golden, Colorado December 2011

217

Using an Energy Performance Based Design-Build Process to Procure a Large Scale Low-Energy Building: Preprint  

SciTech Connect (OSTI)

This paper will review a procurement, acquisition, and contract process of a large-scale replicable net zero energy (ZEB) office building. The owners developed and implemented an energy performance based design-build process to procure a 220,000 ft2 office building with contractual requirements to meet demand side energy and LEED goals. We will outline the key procurement steps needed to ensure achievement of our energy efficiency and ZEB goals. The development of a clear and comprehensive Request for Proposals (RFP) that includes specific and measurable energy use intensity goals is critical to ensure energy goals are met in a cost effective manner. The RFP includes a contractual requirement to meet an absolute demand side energy use requirement of 25 kBtu/ft2, with specific calculation methods on what loads are included, how to normalize the energy goal based on increased space efficiency and data center allocation, specific plug loads and schedules, and calculation details on how to account for energy used from the campus hot and chilled water supply. Additional advantages of integrating energy requirements into this procurement process include leveraging the voluntary incentive program, which is a financial incentive based on how well the owner feels the design-build team is meeting the RFP goals.

Pless, S.; Torcellini, P.; Shelton, D.

2011-05-01T23:59:59.000Z

218

Constraining dark energy evolution with gravitational lensing by large scale structures  

Science Journals Connector (OSTI)

We study the sensitivity of weak lensing by large scale structures as a probe of the evolution of dark energy. We explore a two-parameters model of dark energy evolution, inspired by tracking quintessence models. To this end, we compute the likelihood of a few fiducial models with varying and nonvarying equation of states. For the different models, we investigate the dark energy parameter degeneracies with the mass power spectrum shape ?, normalization ?8, and with the matter mean density ?M. We find that degeneracies are such that weak lensing turns out to be a good probe of dark energy evolution, even with limited knowledge on ?, ?8, and ?M. This result is a strong motivation for performing large scale structure simulations beyond the simple constant dark energy models, in order to calibrate the nonlinear regime accurately. Such calibration could then be used for any large scale structure tests of dark energy evolution. Prospective for the Canada France Hawaii Telescope Legacy Survey and Super-Novae Acceleration Probe are given. These results complement nicely the cosmic microwave background and supernovae constraints.

Karim Benabed and Ludovic Van Waerbeke

2004-12-09T23:59:59.000Z

219

Advanced atomization concept for CWF burning in small combustors  

SciTech Connect (OSTI)

The present project involves the second phase of research on a new concept in coal-water fuel (CWF) atomization that is applicable to burning in small combustors. It is intended to address the most important problem associated with CWF combustion; i.e., production of small spray droplets in an efficient manner by an atomization device. Phase 1 of this work was successfully completed with the development of an opposed-jet atomizer that met the goals of the first contract. Performance as a function of operating conditions was measured, and the technical feasibility of the device established in the Atlantic Research Atomization Test Facility employing a Malvern Particle Size Analyzer. Testing then proceeded to a combustion stage in a test furnace at a firing rate of 0.5 to 1.5 MMBtu/H.

Heaton, H.; McHale, E.

1991-01-01T23:59:59.000Z

220

Control of air pollution emissions from municipal waste combustors  

SciTech Connect (OSTI)

The November 1990 Clear Air Act Amendments (CAAAs) directed EPA to establish municipal waste combustor (MWC) emissions limits for particulate matter, opacity, hydrogen chloride, sulfur dioxide, nitrogen oxides, carbon monoxide, dioxins, dibenzofurans, cadmium, lead, and mercury. Revised MWC air pollution regulations were subsequently proposed by EPA on September 20, 1994, and promulgated on December 19, 1995. The MWC emission limits were based on the application of maximum achievable control technology (MACT). This paper provides a brief overview of MWC technologies, a summary of EPA`s revised air pollution rules for MWCs, a review of current knowledge concerning formation and control of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans, and a discussion of the behavior and control of mercury in MWC flue gases. 56 refs., 11 figs., 3 tabs.

Kolgroe, J.D. [Environmental Protection Agency, Research Triangle Park, NC (United States). National Risk Management Research Lab.; Licata, A. [Licata Energy and Environmental Consultants, Inc., Yonkers, NY (United States)

1996-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Fluidized bed combustor and removable windbox and tube assembly therefor  

DOE Patents [OSTI]

A fluidized bed combustor comprises a housing having a chamber therein with a top having a discharge for the gases which are generated in the chamber and a bottom with a discharge for heated fluid. An assembly is arranged in the lower portion of the chamber and the assembly includes a lower plate which is mounted on a support flange of the housing so that it is spaced from the bottom of the chamber and defines a fluid plenum between it and the bottom of the chamber for the discharge of heated fluid. The assembly includes a heat exchanger inlet plenum having tubes therethrough for the passage of fluidizer air and a windbox above the heat exchanger plenum which has a distributor plate top wall. A portion of the chamber above the top wall defines a fluidized bed.

DeFeo, Angelo (Totowa, NJ); Hosek, William (Mt. Tabor, NJ)

1983-01-01T23:59:59.000Z

222

Fluidized bed combustor and removable windbox and tube assembly therefor  

DOE Patents [OSTI]

A fluidized bed combustor comprises a housing having a chamber therein with a top having a discharge for the gases which are generated in the chamber and a bottom with a discharge for heated fluid. An assembly is arranged in the lower portion of the chamber and the assembly includes a lower plate which is mounted on a support flange of the housing so that it is spaced from the bottom of the chamber and defines a fluid plenum between it and the bottom of the chamber for the discharge of heated fluid. The assembly includes a heat exchanger inlet plenum having tubes therethrough for the passage of fluidizer air and a windbox above the heat exchanger plenum which has a distributor plate top wall. A portion of the chamber above the top wall defines a fluidized bed.

DeFeo, Angelo (Totowa, NJ); Hosek, William S. (Mt. Tabor, NJ)

1981-01-01T23:59:59.000Z

223

Hybrid Recursive Energy-based Method for Robust Optical Flow on Large Motion Fields  

E-Print Network [OSTI]

Hybrid Recursive Energy-based Method for Robust Optical Flow on Large Motion Fields Jangheon Kim for optical flow estimation. The method efficiently combines the advantage of discrete motion estimation and optical flow estimation in a recursive block-to-pixel estimation scheme. Integrated local and global

Wichmann, Felix

224

Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar  

Broader source: Energy.gov (indexed) [DOE]

Loan Guarantee Would Support Large-Scale Rooftop Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing September 7, 2011 - 2:10pm Addthis Washington D.C. - U.S. Energy Secretary Steven Chu today announced the offer of a conditional commitment for a partial guarantee of a $344 million loan that will support the SolarStrong Project, which is expected to be a record expansion of residential rooftop solar power in the United States. Under the SolarStrong Project, SolarCity Corporation will install, own and operate up to 160,000 rooftop solar installations on as many as 124 U.S. military bases in up to 33 states. SolarCity expects the project to fund approximately 750 construction jobs over five years and 28 full time

225

ESS 2012 Peer Review - Nitrogen-Oxygen Battery for Large Scale Energy Storage - Frank Delnick, SNL  

Broader source: Energy.gov (indexed) [DOE]

US DOE Energy Storage Systems Research Program US DOE Energy Storage Systems Research Program Peer Review, Washington, DC Sept. 26-28, 2012 Frank Delnick, David Ingersoll, Karen Waldrip, Peter Feibelman Nitrogen/Oxygen Battery A Transformational Architecture for Large Scale Energy Storage Power Sources Technology Group Sandia National Laboratories Albuquerque, NM SAND2012-7881P N 2 /O 2 Battery Project Overview  Air/Air battery.  N 2 electrochemistry enables the redefinition of a gas (diffusion) electrode and the three phase interface.  Operated as redox flow battery.  Provide a very high energy density, very low cost, environmentally benign electrochemical platform for load leveling and for grid-integrated storage of energy generated by wind, solar and other sustainable but intermittent sources.

226

Space charge modeling of dense electron beams with large energy spreads  

Science Journals Connector (OSTI)

Theoretical and numerical studies of the transport in vacuum of multi-nC, multi-MeV electron beams are performed using several methods, including envelope models, a novel semianalytic approach using ellipsoidal shell decomposition, a modified electrostatic particle-in-cell method, and a point-to-point interaction model. The effects of space-charge forces on the longitudinal and transverse bunch properties are evaluated for various bunch lengths, energies, energy spreads, and charges. An evaluation of the various methods for studying space-charge effects in large energy spread, high charge beams is summarized. Examples are given for beam distributions typical of those generated by plasma-based accelerators. It is found that, for the highly correlated beams produced in the self-modulated regime, the high energy portion of the beam can gain significant energy while propagating in vacuum due to space-charge effects.

G. Fubiani; J. Qiang; E. Esarey; W. P. Leemans; G. Dugan

2006-06-22T23:59:59.000Z

227

Microsoft Word - 41891_SWPC_Catalytic Combustor_Factsheet_Rev01_04-24.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

891_SWPC_CATALYTIC COMBUSTOR_FACTSHEET_REV01_04-24.DOC 891_SWPC_CATALYTIC COMBUSTOR_FACTSHEET_REV01_04-24.DOC Facts Sheet: Catalytic Combustor for Fuel Flexible Gas Turbine (DE-FC26-03NT41891) I. PROJECT PARTICIPANTS A. Siemens Westinghouse Power Corporation B. Caterpillar/Solar Turbine C. Penn State University D. Southern Company Services II. PROJECT DESCRIPTION A. Objective: To develop and demonstrate a cost effective, fuel flexible (syngas/natural gas) catalytic combustor that will achieve ultra low NOx emissions (2ppm) at the exit of the gas turbine and without the use of backend cleanup in Integrated Gasification Combined Cycle (IGCC) application. B. Background/Relevancy 1. Background: Catalytic combustion has been shown to achieve lowest emissions in conventional gas turbine application (natural gas only). Available technical data indicate that it can be effective

228

On mechanisms of formation of environmentally harmful compounds in homogeneous combustors  

Science Journals Connector (OSTI)

A kinetic model is developed for calculating the emission characteristics of homogeneous combustors using methane and synthesis gas (syngas) as a fuel. The model is ... OH in laminar flames and in the Bunsen burner

V. E. Kozlov; A. M. Starik; N. S. Titova…

2013-09-01T23:59:59.000Z

229

Hydrodynamic Model with Binary Particle Diameters to Predict Axial Voidage Profile in a CFB Combustor  

Science Journals Connector (OSTI)

A hydrodynamic model with binary particle diameters was developed to better predict axial voidage profile in a CFB combustor. In the model, the CFB is regarded as a superposition of two ... field data of voidage ...

J. J. Li; H. Zhang; H. R. Yang; Y. X. Wu…

2010-01-01T23:59:59.000Z

230

On-engine evaluation of emission characteristics of a variable geometry lean-premixed combustor  

SciTech Connect (OSTI)

The design and on-engine testing of a lean-premixed, low-NO{sub x} combustor for a simple-cycle, single-shaft, 250-kW gas turbine engine of a pressure ratio of eight are described. A variable-geometry system composed of butterfly air valves was used to control the combustor air split between combustion and dilution. Fuel was staged to a direct-injection pilot burner, and a lean-premixed main burner was fitted to the combustor liner. The NO{sub x} emissions with natural gas fueling were found to be less than 20 ppm (at 5% O{sub 2}) at and near full-load conditions with combustion efficiencies greater than 99.8%. Emissions data from early high-pressure rig tests of the combustor hardware are also presented.

Yamada, H.; Shimodaira, K.; Hayashi, S. [National Aerospace Lab., Tokyo (Japan). Thermofluid Dynamics Div.

1997-01-01T23:59:59.000Z

231

DUAL MODE SCRAMJET: A COMPUTATIONAL INVESTIGATION ON COMBUSTOR DESIGN AND OPERATION.  

E-Print Network [OSTI]

??Numerical analysis was performed on a Dual-Mode Scramjet isolator-combustor. Preliminary analysis was performed to form a baseline geometry. Another study validated the results of a… (more)

Milligan, Ryan Timothy

2009-01-01T23:59:59.000Z

232

Suppression of thermoacoustic instabilities in a swirl combustor through microjet air injection  

E-Print Network [OSTI]

Thermoacoustic or combustion instability, a positive feedback loop coupling heat release rate and acoustic oscillations in a combustor, is one of the greatest challenges currently facing the development of new gas turbine ...

LaBry, Zachary Alexander

2010-01-01T23:59:59.000Z

233

PSR-based microstructural modeling for turbulent combustion processes and pollutant formation in double swirler combustors  

Science Journals Connector (OSTI)

The present study numerically investigates the fuel-air mixing characteristics, flame structure, and pollutant emission inside a double-swirler combustor. A PSR (Perfectly Stirred Reactor) based microstructura...

Seong-Ku Kim; Sung-Mo Kang; Yong-Mo Kim; Jeong-Lak Sohn

2001-01-01T23:59:59.000Z

234

A feasibility study of oil shale fired pulse combustors with applications to oil shale retorting  

SciTech Connect (OSTI)

The results of the experimental investigation performed to determine the feasibility of using pulverized Colorado oil shale to fuel a bench scale pulse combustor reveal that oil shale cannot sustain pulsations when used alone as fuel. Trace amounts of propane mixed with the oil shale enabled the pulsations, however. Up to 80% of the organic material in the oil shale was consumed when it was mixed with propane in the combustor. Beyond the feasibility objectives, the operating conditions of the combustor fuel with propane and mixtures of oil shale and propane were characterized with respect to pulsation amplitude and frequency and the internal combustor wall temperature over fuel lean and fuel rich stoichiometries. Maximum pressure excursions of 12.5 kPa were experienced in the combustor. Pulsation frequencies ranged from 50 to nearly 80 Hz. Cycle resolved laser Doppler anemometry velocities were measured at the tail pipe exit plane. Injecting inert mineral matter (limestone) into the pulse combustor while using propane fuel had only a slight effect on the pulsation frequency for the feed rates tested.

Morris, G.J.; Johnson, E.K.; Zhang, G.Q.; Roach, R.A.

1992-07-01T23:59:59.000Z

235

Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities (Book), Large-Scale Renewable Energy Guide, Federal Energy Management Program (FEMP)  

Broader source: Energy.gov (indexed) [DOE]

LARGE-SCALE RENEWABLE ENERGY GUIDE LARGE-SCALE RENEWABLE ENERGY GUIDE Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital Cover photos, clockwise from the top: Installing mirrored parabolic trough collectors - (January 19, 2012) Crews work around the clock installing mirrored parabolic trough collectors, built on site, that will cover 3 square miles at Abengoa's Solana Plant. Solana a 280 megawatt utility scale solar power plant (CSP) under construction in Gila Bend, Arizona, USA. When finished it will generate 280 MW 's of clean, sustainable power serving over 70,000 Arizona homes. Photo by Dennis Schroeder, NREL 20097 Dry Lake Wind Power Project in Arizona; Suzlon S88 wind turbines - The 63-MW Dry Lake Wind Power Project in Arizona is the first

236

Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities (Book), Large-Scale Renewable Energy Guide, Federal Energy Management Program (FEMP)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LARGE-SCALE RENEWABLE ENERGY GUIDE LARGE-SCALE RENEWABLE ENERGY GUIDE Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital Cover photos, clockwise from the top: Installing mirrored parabolic trough collectors - (January 19, 2012) Crews work around the clock installing mirrored parabolic trough collectors, built on site, that will cover 3 square miles at Abengoa's Solana Plant. Solana a 280 megawatt utility scale solar power plant (CSP) under construction in Gila Bend, Arizona, USA. When finished it will generate 280 MW 's of clean, sustainable power serving over 70,000 Arizona homes. Photo by Dennis Schroeder, NREL 20097 Dry Lake Wind Power Project in Arizona; Suzlon S88 wind turbines - The 63-MW Dry Lake Wind Power Project in Arizona is the first

237

Energy spectra of quantum turbulence: Large-scale simulation and modeling  

Science Journals Connector (OSTI)

In a 20483 simulation of quantum turbulence within the Gross-Pitaevskii equation, it is demonstrated that the large-scale motions have a classical Kolmogorov-1941 energy spectrum E(k)?k?5/3, followed by an energy accumulation with E(k)? const at k about the reciprocal mean intervortex distance. This behavior was predicted by the L'vov-Nazarenko-Rudenko bottleneck model of gradual eddy-wave crossover [L’vov, Nazarenko, and Rudenko, J. Low Temp. Phys. 153, 140 (2008)], further developed in the paper.

Narimasa Sasa; Takuma Kano; Masahiko Machida; Victor S. L’vov; Oleksii Rudenko; Makoto Tsubota

2011-08-11T23:59:59.000Z

238

Energy Efficiency of large Cryogenic Systems: the LHC Case and Beyond  

E-Print Network [OSTI]

Research infrastructures for high-energy and nuclear physics, nuclear fusion and production of high magnetic fields are increasingly based on applied superconductivity and associated cryogenics in their quest for scientific breakthroughs at affordable capital and operation costs, a condition for their acceptance and sustained funding by society. The thermodynamic penalty for operating at low temperature makes energy efficiency a key requirement for their large cryogenic systems, from conceptual design to procurement, construction and operation. Meeting this requirement takes a combined approach on several fronts in parallel: management of heat loads and sizing of cooling duties, distribution of cooling power matching the needs of the superconducting devices, efficient production of refrigeration, optimal control resting on precise instrumentation and diagnostics, as well as a targeted industrial procurement policy. The case of the Large Hadron Collider (LHC) at CERN is presented. Potential improvements for fu...

Claudet, S; Ferlin, G; Lebrun, P; Tavian, L; Wagner, U

2013-01-01T23:59:59.000Z

239

Effect of high-energy neutral particles on extreme ultraviolet spectroscopy in large helical device  

SciTech Connect (OSTI)

Spectra measured by an extreme ultraviolet (EUV) spectrometer frequently suffer large spike noise when Large Helical Device is operated in low-density range ({<=}3 Multiplication-Sign 10{sup 13} cm{sup -3}) with neutral beam injection (NBI). The spike noise completely disappears in electron cyclotron heating discharges. In order to examine the effect of NBI, a carbon filter with thickness of 150 nm was installed in the EUV spectrometer. As a result, the spike noise was reduced by an order of magnitude. It is experimentally verified that the spike noise is caused by escaping high-energy neutral particles resulting from the circulating high-energy hydrogen ions borne from NBI.

Dong Chunfeng; Sakaue, Hiroyuki [National Institute for Fusion Science, Toki 509-5292, Gifu (Japan); Morita, Shigeru; Tokitani, Masayuki; Goto, Motoshi [National Institute for Fusion Science, Toki 509-5292, Gifu (Japan); Department of Fusion Science, Graduate University for Advanced Studies, Toki 509-5292, Gifu (Japan); Wang, Erhui [Department of Fusion Science, Graduate University for Advanced Studies, Toki 509-5292, Gifu (Japan); Zushi, Hideki [RIAM, Kyushu University, Kasuga 816-8580, Fukuoka (Japan)

2012-10-15T23:59:59.000Z

240

NONEQUILIBRIUM SULFUR CAPTURE AND RETENTION IN AN AIR COOLED SLAGGING COAL COMBUSTOR  

SciTech Connect (OSTI)

Calcium oxide injected in a slagging combustor reacts with the sulfur from coal combustion to form sulfur-bearing particles. They are deposited on the liquid slag layer on the combustor wall. Due to the low solubility of sulfur in slag, slag must be rapidly drained from the combustor to limit sulfur gas re-evolution. Analysis indicated that slag mass flow rates in excess of 400 lb/hr should limit sulfur re-evolution. The objective of this 42-month project was to perform a series of tests to determine the factors that control the retention of the sulfur in the slag. 36 days of testing on the combustor were completed prior to the end of this reporting period, 12/31/98. This compares with 16 tests required in the original project plan. Combustor tests in early 1997 with high (37%) ash, Indian coal confirmed that high slag mass flow rates of about 500 lb/hr resulted in retention in the slag of up to 20% of the injected sulfur content mineral matter. To further increase the slag flow rate, rice husks, which contain 20% ash, and rice husk char, which contain 70% ash, were co-fired with coal in the combustor. A series of 13 combustor tests were performed in fourth quarter of 1997 and a further 6 tests were performed in January 1998 and in the summer of 1998. The test objective was to achieve slag flow rates between 500 and 1,000 lb/hr. Due to the very low bulk density of rice husk, compared to pulverized coal, almost the entire test effort focused on developing methods for feeding the rice husks into combustor. In the last test of December 1997, a peak mineral matter, injection rate of 592 lb/hr was briefly achieved by injection of coal, rice husk char, gypsum, and limestone into the combustor. However, no significant sulfur concentration was measured in the slag removed from the combustor. The peak injection rate reached with biomass in the 1997 tests was 310 lb/hr with rice husk, and 584 lb/hr with rice husk char.

Dr. Bert Zauderer

1999-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
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241

Infrared spectra of individual semiconducting single-walled carbon nanotubes: Testing the scaling of transition energies for large diameter nanotubes  

E-Print Network [OSTI]

of transition energies for large diameter nanotubes Matthew Y. Sfeir and James A. Misewich* Condensed Matter on the same individual nanotube over an energy range of 0.3­2.7 eV. We find that well-established energy scaling relations developed for nanotubes of smaller diameter are not consistent with the measured low-energy

Heinz, Tony F.

242

Energy Use Intensity and its Influence on the Integrated Daylighting Design of a Large Net Zero Energy Building: Preprint  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Use Intensity and its Use Intensity and its Influence on the Integrated Daylighting Design of a Large Net Zero Energy Building Preprint Rob Guglielmetti, Jennifer Scheib, Shanti D. Pless, and Paul Torcellini National Renewable Energy Laboratory Rachel Petro RNL Design Presented at the ASHRAE Winter Conference Las Vegas, Nevada January 29 - February 2, 2011 Conference Paper NREL/CP-5500-49103 March 2011 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes.

243

EFFECT OF COMBUSTOR INLET GEOMETRY ON ACOUSTIC SIGNATURE AND FLOW FIELD BEHAVIOUR OF THE LOW SWIRL INJECTOR  

E-Print Network [OSTI]

in this study is configured for NETL’s SimVal high pressureidentical to the combustor in NETL’s SimVal high-pressure

Therkelsen, Peter L.

2010-01-01T23:59:59.000Z

244

OPTIMIZATION OF FUEL-AIR MIXING FOR A SCRAMJET COMBUSTOR GEOMETRY USING CFD AND A GENETIC ALGORITHM .  

E-Print Network [OSTI]

??A new methodology for the optimization of fuel-air mixing in a scramjet combustor using integrated Genetic Algorithms and Computational Fluid Dynamics is presented. A typical… (more)

Ahuja, Vivek

2008-01-01T23:59:59.000Z

245

Galaxy peculiar velocities from large-scale supernova surveys as a dark energy probe  

SciTech Connect (OSTI)

Upcoming imaging surveys such as the Large Synoptic Survey Telescope will repeatedly scan large areas of sky and have the potential to yield million-supernova catalogs. Type Ia supernovae are excellent standard candles and will provide distance measures that suffice to detect mean pairwise velocities of their host galaxies. We show that when combining these distance measures with photometric redshifts for either the supernovae or their host galaxies, the mean pairwise velocities of the host galaxies will provide a dark energy probe which is competitive with other widely discussed methods. Adding information from this test to type Ia supernova photometric luminosity distances from the same experiment, plus the cosmic microwave background power spectrum from the Planck satellite, improves the Dark Energy Task Force figure of merit by a factor of 1.8. Pairwise velocity measurements require no additional observational effort beyond that required to perform the traditional supernova luminosity distance test, but may provide complementary constraints on dark energy parameters and the nature of gravity. Incorporating additional spectroscopic redshift follow-up observations could provide important dark energy constraints from pairwise velocities alone. Mean pairwise velocities are much less sensitive to systematic redshift errors than the luminosity distance test or weak lensing techniques, and also are only mildly affected by systematic evolution of supernova luminosity.

Bhattacharya, Suman; Kosowsky, Arthur; Newman, Jeffrey A.; Zentner, Andrew R. [T-2, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)

2011-02-15T23:59:59.000Z

246

Analysis of savings due to multiple energy retrofits in a large office building  

SciTech Connect (OSTI)

The objective of this analysis was to characterize the benefits of the individual energy conservation measures that were applied to an existing large office building. The measures included those for lighting; those for the heating, ventilation, and air conditioning (HVAC) systems; and an energy management and control system (EMCS). The purpose was to improve our understanding of the impacts of the individual measures in contrast to the entire group of measures that were installed during a building improvement project. The scope of the study was primarily analytical; it used an hourly building simulation model to estimate the benefits. Input parameters for this model were adjusted so that the calculated results matched closely with the available monthly electrical billing data. Supplemental building energy use data were collected and used to improve the adjustment of these parameters. The benefits of the individual measures were then calculated using the matched model.

McLain, H.A.; Leigh, S.B.; MacDonald, J.M.

1994-05-01T23:59:59.000Z

247

Development of a combustor liner composed of ceramic matrix composite (CMC)  

SciTech Connect (OSTI)

The Research Institute of Advanced Materials Gas-Generator (AMG), which is a joint effort by the Japan Key Technology Center and 14 firms in Japan, has, since fiscal year 1992, been conducting technological studies on an innovative gas generator that will use 20% less fuel, weight 50% less, and emit 70% less NO{sub x} than the conventional gas generator through the use of advanced materials. Within this project, there is an R and D program for applying ceramic matrix composite (CMC) liners to the combustor, which is a major component of the gas generator. In the course of R and D, continuous SiC fiber-reinforced SiC composite (SiC{sup F}/SiC) was selected as the most suitable CMD for the combustor liner because of its thermal stability and formability. An evaluation of the applicability of the SiC{sup F}/SiC composite to the combustor liner on the basis of an evaluation of its mechanical properties and stress analysis of a SiC{sup F}/SiC combustor liner was carried out, and trial SiC{sup F}/SiC combustor liners, the largest of which was 500-mm in diameter, were fabricated by the filament winding and PIP (polymer impregnation and pyrolysis) method. Using a SiC{sup F}/SiC liner built to the actual dimensions, a noncooling combustion test was carried out and even when the gas temperature was raised to 1873K at outlet of the liner, no damage was observed after the test. Through their studies, the authors have confirmed the applicability of the selected SiC{sup F}/SiC composite as a combustor liner. In this paper, the authors describe the present state of the R and D of a CMC combustor liner.

Nishio, K.; Igashira, K.I.; Take, K. [Research Inst. of Advanced Material Gas-Generator, Tokyo (Japan); Suemitsu, T. [Kawasaki Heavy Industries Limited, Hyogo (Japan)

1999-01-01T23:59:59.000Z

248

Impulsive phase flare energy transport by large-scale Alfven waves and the electron acceleration problem  

E-Print Network [OSTI]

The impulsive phase of a solar flare marks the epoch of rapid conversion of energy stored in the pre-flare coronal magnetic field. Hard X-ray observations imply that a substantial fraction of flare energy released during the impulsive phase is converted to the kinetic energy of mildly relativistic electrons (10-100 keV). The liberation of the magnetic free energy can occur as the coronal magnetic field reconfigures and relaxes following reconnection. We investigate a scenario in which products of the reconfiguration - large-scale Alfven wave pulses - transport the energy and magnetic-field changes rapidly through the corona to the lower atmosphere. This offers two possibilities for electron acceleration. Firstly, in a coronal plasma with beta < m_e/m_p, the waves propagate as inertial Alfven waves. In the presence of strong spatial gradients, these generate field-aligned electric fields that can accelerate electrons to energies on the order of 10 keV and above, including by repeated interactions between el...

Fletcher, L

2007-01-01T23:59:59.000Z

249

Covariance of dark energy parameters and sound speed constraints from large HI surveys  

E-Print Network [OSTI]

An interesting probe of the nature of dark energy is the measure of its sound speed, $c_s$. We review the significance for constraining sound speed models of dark energy using large neutral hydrogen (HI) surveys with the Square Kilometre Array (SKA). Our analysis considers the effect on the sound speed measurement that arises from the covariance of $c_s$ with the dark energy density, $\\Omega_\\LLambda$, and a time-varying equation of state, $w(a)=w_0+(1-a)w_a$. We find that the approximate degeneracy between dark energy parameters that arises in power spectrum observations is lifted through redshift tomography of the HI-galaxy angular power spectrum, resulting in sound speed constraints that are not severely degraded. The cross-correlation of the galaxy and the integrated Sachs-Wolfe (ISW) effect spectra contributes approximately 10 percent of the information that is needed to distinguish variations in the dark energy parameters, and most of the discriminating signal comes from the galaxy auto-correlation spectrum. We also find that the sound speed constraints are weakly sensitive to the HI bias model. These constraints do not improve substantially for a significantly deeper HI survey since most of the clustering sensitivity to sound speed variations arises from $z \\lsim 1.5$. A detection of models with sound speeds close to zero, $c_s \\lsim 0.01,$ is possible for dark energy models with $w\\gsim -0.9$.

A. Torres-Rodriguez; C. M. Cress; K. Moodley

2008-04-15T23:59:59.000Z

250

Investigations of swirl flames in a gas turbine model combustor  

SciTech Connect (OSTI)

The thermochemical states of three swirling CH{sub 4}/air diffusion flames, stabilized in a gas turbine model combustor, were investigated using laser Raman scattering. The flames were operated at different thermal powers and air/fuel ratios and exhibited different flame behavior with respect to flame instabilities. They had previously been characterized with respect to their flame structures, velocity fields, and mean values of temperature, major species concentrations, and mixture fraction. The single-pulse multispecies measurements presented in this article revealed very rapid mixing of fuel and air, accompanied by strong effects of turbulence-chemistry interactions in the form of local flame extinction and ignition delay. Flame stabilization is accomplished mainly by hot and relatively fuel-rich combustion products, which are transported back to the flame root within an inner recirculation zone. The flames are not attached to the fuel nozzle, and are stabilized approximately 10 mm above the fuel nozzle, where fuel and air are partially premixed before ignition. The mixing and reaction progress in this area are discussed in detail. The flames are short (<50 mm), especially that exhibiting thermoacoustic oscillations, and reach a thermochemical state close to adiabatic equilibrium at the flame tip. The main goals of this article are to outline results that yield deeper insight into the combustion of gas turbine flames and to establish an experimental database for the validation of numerical models.

Meier, W.; Duan, X.R.; Weigand, P. [Institut fuer Verbrennungstechnik, Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), Pfaffenwaldring 38, D-70569 Stuttgart (Germany)

2006-01-01T23:59:59.000Z

251

Fuel burner and combustor assembly for a gas turbine engine  

DOE Patents [OSTI]

A fuel burner and combustor assembly for a gas turbine engine has a housing within the casing of the gas turbine engine which housing defines a combustion chamber and at least one fuel burner secured to one end of the housing and extending into the combustion chamber. The other end of the fuel burner is arranged to slidably engage a fuel inlet connector extending radially inwardly from the engine casing so that fuel is supplied, from a source thereof, to the fuel burner. The fuel inlet connector and fuel burner coact to anchor the housing against axial movement relative to the engine casing while allowing relative radial movement between the engine casing and the fuel burner and, at the same time, providing fuel flow to the fuel burner. For dual fuel capability, a fuel injector is provided in said fuel burner with a flexible fuel supply pipe so that the fuel injector and fuel burner form a unitary structure which moves with the fuel burner.

Leto, Anthony (Franklin Lakes, NJ)

1983-01-01T23:59:59.000Z

252

Heat loss reduction and hydrocarbon combustion in ultra-micro combustors for ultra-micro gas turbines  

Science Journals Connector (OSTI)

For the development of ultra-micro combustors for Ultra-Micro Gas Turbines (UMGT), heat loss reduction and hydrocarbon fuel use are the key issues. An approach for reducing the effect of heat loss in ultra-micro combustors was proposed. The heat loss ratio (HLR), which was defined as the ratio of heat loss rate from a combustor to heat release rate in the combustor, was related to the space heating rate (SHR), and experiments using some flat-flame ultra-micro combustors with hydrogen/air premixture exhibited the relation of HLR ? SHR?0.92/? (?, characteristic length of combustor). From the viewpoint of heat loss reduction, burning at high SHR in compact ultra-micro combustors is essential for a practical UMGT combustor. As for hydrocarbon combustion, the flat-flame burning method with and without catalyst was applied to propane fuel. The flat-flame combustor, having an inner diameter of 18.5 mm, a height of 3.5 mm, and a volume of 0.806 cm3, could form a propane flame successfully in the chamber without a catalyst and achieved an extremely high SHR of 3370 MW/(MPa m3). Flame stable region was wide enough, and the combustion efficiency achieved was more than 99.4% between the equivalence ratios of 0.5 and 0.7 at m ? a = 0.06 g / s . The flat-flame combustor using a Pt-impregnated porous plate showed catalytic combustion, but did not improve the combustion characteristic. On the other hand, the flat-flame combustor using a nozzle whose surface was covered with Pt showed a combination of catalytic and gas-phase combustion with improved combustion efficiency for a wider range of equivalence ratios, due to CO oxidation in the burned gas after gas-phase combustion in the chamber.

Takashi Sakurai; Saburo Yuasa; Taku Honda; Shoko Shimotori

2009-01-01T23:59:59.000Z

253

Utilizing Type Ia Supernovae in a Large, Fast, Imaging Survey to Constrain Dark Energy  

E-Print Network [OSTI]

We study the utility of a large sample of type Ia supernovae that might be observed in an imaging survey that rapidly scans a large fraction of the sky for constraining dark energy. We consider information from the traditional luminosity distance test as well as the spread in SNeIa fluxes at fixed redshift induced by gravitational lensing. We include a treatment of photometric redshift uncertainties in our analysis. Our primary result is that the information contained in the mean distance moduli of SNeIa and the dispersion among SNeIa distance moduli complement each other, breaking a degeneracy between the present dark energy equation of state and its time variation without the need for a high-redshift supernova sample. To address photometric redshift uncertainties, we present dark energy constraints as a function of the size of an external set of spectroscopically-observed SNeIa that may be used for redshift calibration, nspec. We find that an imaging survey can constrain the dark energy equation of state at the epoch where it is best constrained with a 1-sigma error of sigma(wpiv)~0.03-0.09$, depending upon various assumptions. In addition, the marginal improvement in the error sigma(wpiv) from an increase in the spectroscopic calibration sample drops once nspec ~ 10^3. This result is important because it is of the order of the size of calibration samples likely to be compiled in the coming decade and because, for samples of this size, the spectroscopic and imaging surveys individually place comparable constraints on the dark energy equation of state. In all cases, it is best to calibrate photometric redshifts with a set of spectroscopically-observed SNeIa with relatively more objects at high redshift than the parent sample of imaging SNeIa.

Andrew R. Zentner; Suman Bhattacharya

2008-12-01T23:59:59.000Z

254

Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys  

E-Print Network [OSTI]

We show that the measurement of the baryonic acoustic oscillations in large high redshift galaxy surveys offers a precision route to the measurement of dark energy. The cosmic microwave background provides the scale of the oscillations as a standard ruler that can be measured in the clustering of galaxies, thereby yielding the Hubble parameter and angular diameter distance as a function of redshift. This, in turn, enables one to probe dark energy. We use a Fisher matrix formalism to study the statistical errors for redshift surveys up to z=3 and report errors on cosmography while marginalizing over a large number of cosmological parameters including a time-dependent equation of state. With redshifts surveys combined with cosmic microwave background satellite data, we achieve errors of 0.037 on Omega_x, 0.10 on w(z=0.8), and 0.28 on dw(z)/dz for cosmological constant model. Models with less negative w(z) permit tighter constraints. We test and discuss the dependence of performance on redshift, survey conditions, and fiducial model. We find results that are competitive with the performance of future supernovae Ia surveys. We conclude that redshift surveys offer a promising independent route to the measurement of dark energy.

Hee-Jong Seo; Daniel J. Eisenstein

2003-07-26T23:59:59.000Z

255

Investigation of swirling flow mixing for application in an MHD pulverized coal combustor using isothermal modeling  

SciTech Connect (OSTI)

The purpose of this study was to investigate combustor reactant mixing with swirling oxidizer flow. The combustor configuration that was considered was designed to simulate a 4 lbm/sec mas flow pulverized coal combustor being tested in The University of Tennessee Space Institute MHD Facility. A one-fourth dimensionally scaled combustor model was developed for isothermal flow testing. A comparison was made of cold flow tests using 3 swirler designs with a base case oxidizer injector design of perforated plated which demonstrated acceptable performance in the 4 lbm/sec MHD combustor. The three swirlers that were evaluated were designed to allow a wide range of swirl intensity to be investigated. The design criterion of the swirler was the swirl number which has been related to swirler geometry. The results of the study showed that the swirlers that were tested fell short of the mixing characteristics displayed with the perforated plate base case oxidizer injector. Test data obtained with the cold flow model established that the actual swirl numbers of two of the swirlers were much lower than the design swirl numbers. Recirculation zones were defined for all configurations that were tested, and a comparison of velocity profiles was made for the configurations.

Power, W. H.

1980-05-01T23:59:59.000Z

256

The Future of the Local Large Scale Structure: the roles of Dark Matter and Dark Energy  

E-Print Network [OSTI]

We study the distinct effects of Dark Matter and Dark Energy on the future evolution of nearby large scale structures using constrained N-body simulations. We contrast a model of Cold Dark Matter and a Cosmological Constant (LCDM) with an Open CDM (OCDM) model with the same matter density Omega_m =0.3 and the same Hubble constant h=0.7. Already by the time the scale factor increased by a factor of 6 (29 Gyr from now in LCDM; 78 Gyr from now in OCDM) the comoving position of the Local Group is frozen. Well before that epoch the two most massive members of the Local Group, the Milky Way and Andromeda, will merge. However, as the expansion rates of the scale factor in the two models are different, the Local Group will be receding in physical coordinates from Virgo exponentially in a LCDM model and at a roughly constant velocity in an OCDM model. More generally, in comoving coordinates the future large scale structure will look like a sharpened image of the present structure: the skeleton of the cosmic web will remain the same, but clusters will be more `isolated' and the filaments will become thinner. This implies that the long-term fate of large scale structure as seen in comoving coordinates is determined primarily by the matter density. We conclude that although the LCDM model is accelerating at present due to its Dark Energy component while the OCDM model is non accelerating, their large scale structure in the future will look very similar in comoving coordinates.

Yehuda Hoffman; Ofer Lahav; Gustavo Yepes; Yaniv Dover

2007-10-10T23:59:59.000Z

257

On Flame-Wall Thermal-Coupling in Micro Combustors Yong Fan, Yuji Suzuki, and Nobuhide Kasagi  

E-Print Network [OSTI]

as a periodic process of ignition at the exit and quenching by heat loss to the wall. Hydrocarbon-fueled micro-roll' combustor which establish combustion with heat recirculation (Maruta et al., 2004). On the other hand, gas-phase combustion becomes problematic in micro combustors with a characteristic length comparable

Kasagi, Nobuhide

258

Impulsive Phase Flare Energy Transport by Large-Scale Alfvén Waves and the Electron Acceleration Problem  

Science Journals Connector (OSTI)

The impulsive phase of a solar flare marks the epoch of rapid conversion of energy stored in the preflare coronal magnetic field. Hard X-ray observations imply that a substantial fraction of flare energy released during the impulsive phase is converted to the kinetic energy of mildly relativistic electrons (10-100 keV). The liberation of the magnetic free energy can occur as the coronal magnetic field reconfigures and relaxes following reconnection. We investigate a scenario in which products of the reconfiguration—large-scale Alfvén wave pulses—transport the energy and the magnetic field changes rapidly through the corona to the lower atmosphere. This offers two possibilities for electron acceleration. First, in a coronal plasma with -->? me/mp, the waves propagate as inertial Alfvén waves. In the presence of strong spatial gradients, these generate field-aligned electric fields that can accelerate electrons to energies on the order of 10 keV and above, including by repeated interactions between electrons and wave fronts. Second, when they reflect and mode-convert in the chromosphere, a cascade to high wavenumbers may develop. This will also accelerate electrons by turbulence, in a medium with a locally high electron number density. This concept, which bridges MHD-based and particle-based views of a flare, provides an interpretation of the recently observed rapid variations of the line-of-sight component of the photospheric magnetic field across the flare impulsive phase, and offers solutions to some perplexing flare problems, such as the flare "number problem" of finding and resupplying sufficient electrons to explain the impulsive-phase hard X-ray emission.

L. Fletcher; H. S. Hudson

2008-01-01T23:59:59.000Z

259

NETL: Oxy-Fired Pressurized Fluidized Bed Combustor (Oxy-PFBC)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Oxy-Fired Pressurized Fluidized Bed Combustor (Oxy-PFBC) Oxy-Fired Pressurized Fluidized Bed Combustor (Oxy-PFBC) Project No.: DE-FE0009448 Oxy-PFBC Layout. Oxy-PFBC Layout. Pratt and Whitney Rocketdyne (PWR) is developing an oxy-fired pressurized fluidized bed combustor (Oxy-PFBC). Pressurized combustion with oxygen enables high efficiency through staged combustion, which results in reduced oxygen use, as well as through recovery of high quality heat from exhaust water vapor. In addition, the process can result in reduced costs for utilization or storage of CO2 because the CO2 is available at increased pressure, reducing compression requirements. Overall, pressurized fluidized bed combustion can result in electricity production from coal with near-zero emissions. PWR will be testing a novel process for pressurized oxy-combustion in a

260

Investigation of Heat Transfer and Combustion in the Advanced Fluidized Bed Combustor (FBC).  

SciTech Connect (OSTI)

This technical report summarizes the research conducted and progress achieved during the period from January 1, 1997 to March 30, 1997. The systematic tests were conducted to investigate the thermal performance and heat transfer effect on the exploratory hot model. Test results were analyzed to understand thermal performance, heat balance, and heat transfer effect on exploratory hot model. Temperature was measured at different locations of the combustor chamber. The temperature was decreased along the increase the distance from the bottom of the combustor chamber. The heat loss from the combustor wall to the environment is a great portion of the total heat transfer. The flame enthalpy and heat loss at the reactor center changed along the reactor height. The heat loss into the cooling water for case A is about two times lager than that of case B. The heat transfer coefficient from gas to the environment increased as the flame temperature increased.

Lee, S.W.

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

EFFECT OF COMBUSTOR INLET GEOMETRY ON ACOUSTIC SIGNATURE AND FLOW FIELD BEHAVIOUR OF THE LOW SWIRL INJECTOR  

SciTech Connect (OSTI)

Low Swirl Injector (LSI) technology is a lean premixed combustion method that is being developed for fuel-flexible gas turbines. The objective of this study is to characterize the fuel effects and influences of combustor geometry on the LSI's overall acoustic signatures and flowfields. The experiments consist of 24 flames at atmospheric condition with bulk flows ranging between 10 and 18 m/s. The flames burn CH{sub 4} (at {phi} = 0.6 & 0.7) and a blend of 90% H{sub 2} - 10% CH{sub 4} by volume (at {phi} = 0.35 & 0.4). Two combustor configurations are used, consisting of a cylindrical chamber with and without a divergent quarl at the dump plane. The data consist of pressure spectral distributions at five positions within the system and 2D flowfield information measured by Particle Imaging Velocimetry (PIV). The results show that acoustic oscillations increase with U{sub 0} and {phi}. However, the levels in the 90% H{sub 2} flames are significantly higher than in the CH{sub 4} flames. For both fuels, the use of the quarl reduces the fluctuating pressures in the combustion chamber by up to a factor of 7. The PIV results suggest this to be a consequence of the quarl restricting the formation of large vortices in the outer shear layer. A Generalized Instability Model (GIM) was applied to analyze the acoustic response of baseline flames for each of the two fuels. The measured frequencies and the stability trends for these two cases are predicted and the triggered acoustic mode shapes identified.

Therkelsen, Peter L.; Littlejohn, David; Cheng, Robert K.; Portillo, J. Enrique; Martin, Scott M.

2009-11-30T23:59:59.000Z

262

Impact of Large Scale Energy Efficiency Programs On Consumer Tariffs and Utility Finances in India  

E-Print Network [OSTI]

Mechanisms to Promote Energy Efficiency: Case Study of ato improvements in energy efficiency. Energy Policy, 19(10),Deficit through Energy Efficiency in India: An Evaluation of

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

263

Improved Combustion of Asphaltite Coals in a Rotating Head Combustor with Various Air Supply Arrangements  

Science Journals Connector (OSTI)

A small amount of ash is drifted via combustion gas in fine particles while great deal of it flow into the ash pit in the form of clinker from the open side of combustion head. ... In this study, it was shown that the swelling coals that were difficult to burn in conventional stokers could be burned using a rotating head combustor in high efficiencies without any ash problem. ... In this work, a rotating head combustor, which has been designed for burning the coking coals effectively, was deployed to burn a range of coals available in Turkey under agitation conditions with secondary air delivery. ...

Cengiz Öner; ?ehmus Altun

2014-04-16T23:59:59.000Z

264

Infrared Spectra of Individual Semiconducting Single-walled Carbon Nanotubes: Testing the Scaling of Transition Energies for Large Diameter Nanotubes  

SciTech Connect (OSTI)

We have measured the low-energy excitonic transitions of chiral assigned individual large-diameter semiconducting single-walled nanotubes using a high-resolution Fourier transform photoconductivity technique. When photoconductivity is complemented by Rayleigh scattering spectroscopy, as many as five optical transitions can be identified on the same individual nanotube over an energy range of 0.3-2.7 eV. We find that well-established energy scaling relations developed for nanotubes of smaller diameter are not consistent with the measured low-energy transitions in large (1.8-2.3 nm) diameter nanotubes.

M Sfeir; J Misewich; S Rosenblatt; Y Wu; C Voisin; H Yan; S Berciaud; T Heinz; B Chandra; et al.

2011-12-31T23:59:59.000Z

265

Utilizing Type Ia Supernovae in a Large, Fast, Imaging Survey to Constrain Dark Energy  

Science Journals Connector (OSTI)

We study the utility of a large sample of Type Ia supernovae (SNe Ia) that might be observed in an imaging survey that rapidly scans a large fraction of the sky for constraining dark energy. We consider both the information contained in the traditional luminosity distance test as well as the spread in Ia SN fluxes at fixed redshift induced by gravitational lensing. As would be required from an imaging survey, we include a treatment of photometric redshift uncertainties in our analysis. Our primary result is that the information contained in the mean distance moduli of SNe Ia and the dispersion of SN Ia distance moduli complement each other, breaking a degeneracy between the present dark energy equation of state and its time variation without the need for a high-redshift (z 0.8) SN sample. Including lensing information also allows for some internal calibration of photometric redshifts. To address photometric redshift uncertainties, we present dark energy constraints as a function of the size of an external set of spectroscopically observed SNe that may be used for redshift calibration, N spec. Depending upon the details of potentially available, external SN data sets, we find that an imaging survey can constrain the dark energy equation of state at the epoch where it is best constrained w p, with a 1? error of ?(w p) ? 0.03-0.09. In addition, the marginal improvement in the error ?(w p) from an increase in the spectroscopic calibration sample drops once N spec ~ a few ? 103. This result is important because it is of the order of the size of calibration samples likely to be compiled in the coming decade and because, for samples of this size, the spectroscopic and imaging surveys individually place comparable constraints on the dark energy equation of state. In all cases, it is best to calibrate photometric redshifts with a set of spectroscopically observed SNe with relatively more objects at high redshift (z 0.5) than the parent sample of imaging SNe.

Andrew R. Zentner; Suman Bhattacharya

2009-01-01T23:59:59.000Z

266

Market power, fuel substitution and infrastructure – A large-scale equilibrium model of global energy markets  

Science Journals Connector (OSTI)

Abstract Assessing and quantifying the impacts of technological, economic, and policy shifts in the global energy system require large-scale numerical models. We propose a dynamic multi-fuel market equilibrium model that combines endogenous fuel substitution within demand sectors and in power generation, detailed infrastructure capacity constraints and investment, as well as strategic behaviour and market power aspects by suppliers in a unified framework. This model is the first of its kind in which market power is exerted across several fuels. Using a data set based on the IEA (International Energy Agency) World Energy Outlook 2013 (New Policies scenario, time horizon 2010–2050, 30 regions, 10 fuels), we illustrate the functionality of the model in two scenarios: a reduction of shale gas availability in the US relative to current projections leads to an even stronger increase of power generation from natural gas in the European Union relative to the base case; this is due to a shift in global fossil fuel trade. In the second scenario, a tightening of the EU ETS emission cap by 80% in 2050 combined with a stronger biofuel mandate spawns a renaissance of nuclear power after 2030 and a strong electrification of the transportation sector. We observe carbon leakage rates from the unilateral mitigation effort of 60–70%.

Daniel Huppmann; Ruud Egging

2014-01-01T23:59:59.000Z

267

Development of a Large Pulse Detonation Engine Demonstrator  

E-Print Network [OSTI]

Development of a Large Pulse Detonation Engine Demonstrator Frank K. Lu, J. David Carter and constructed to study pulse detonation engine (PDE) operations under a broad range of test parameters to facilitate deflagration-to-detonation transition. The main sections of the combustor were fitted with fully

Texas at Arlington, University of

268

Vehicle Technologies Office Merit Review 2014: Development of Large Format Lithium Ion Cells with Higher Energy Density  

Broader source: Energy.gov [DOE]

Presentation given by XALT Energy LLC at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about development of large format...

269

Annular-coupled concave–convex stable resonator for large-volume high-quality energy extraction  

Science Journals Connector (OSTI)

A theoretical investigation of a stable concave–convex resonator configuration, which appears suitable for single-mode high-power energy extraction from large volume gain media, is...

Cheng, Zhaogu; Seguin, H J J; Nikumb, S K; Seguin, V A; Reshef, H

1988-01-01T23:59:59.000Z

270

Energy confinement and thermal transport characteristics of net current free plasmas in the Large Helical Device  

Science Journals Connector (OSTI)

The energy confinement and thermal transport characteristics of net current free plasmas in regimes with much smaller gyroradii and collisionality than previously studied have been investigated in the Large Helical Device (LHD). The inward shifted configuration, which is superior from the point of view of neoclassical transport theory, has revealed a systematic confinement improvement over the standard configuration. Energy confinement times are improved over the International Stellarator Scaling 95 by a factor of 1.6 ±0.2 for an inward shifted configuration. This enhancement is primarily due to the broad temperature profile with a high edge value. A simple dimensional analysis involving LHD and other medium sized heliotrons yields a strongly gyro-Bohm dependence (?E? ? ?*-3.8) of energy confinement times. It should be noted that this result is attributed to a comprehensive treatment of LHD for systematic confinement enhancement and that the medium sized heliotrons have narrow temperature profiles. The core stored energy still indicates a dependence of ?E? ? ?*-2.6 when data only from LHD are processed. The local heat transport analysis of discharges dimensionally similar except for ?* suggests that the heat conduction coefficient lies between Bohm and gyro-Bohm in the core and changes towards strong gyro-Bohm in the peripheral region. Since the inward shifted configuration has a geometrical feature suppressing neoclassical transport, confinement improvement can be maintained in the collisionless regime where ripple transport is important. The stiffness of the pressure profile coincides with enhanced transport in the peaked density profile obtained by pellet injection.

H. Yamada; K.Y. Watanabe; K. Yamazaki; S. Murakami; S. Sakakibara; K. Narihara; K. Tanaka; M. Osakabe; K. Ida; N. Ashikawa; P.C. De Vries; M. Emoto; H. Funaba; M. Goto; H. Idei; K. Ikeda; S. Inagaki; N. Inoue; M. Isobe; S. Kado; O. Kaneko; K. Kawahata; K. Khlopenkov; T. Kobuchi; A. Komori; S. Kubo; R. Kumazawa; Y. Liang; S. Masuzaki; T. Minami; J. Miyazawa; T. Morisaki; S. Morita; S. Muto; T. Mutoh; Y. Nagayama; N. Nakajima; Y. Nakamura; H. Nakanishi; K. Nishimura; N. Noda; T. Notake; S. Ohdachi; N. Ohyabu; Y. Oka; T. Ozaki; R.O. Pavlichenko; B.J. Peterson; G. Rewoldt; A. Sagara; K. Saito; R. Sakamoto; H. Sasao; M. Sasao; K. Sato; M. Sato; T. Seki; T. Shimozuma; M. Shoji; H. Sugama; H. Suzuki; M. Takechi; Y. Takeiri; N. Tamura; K. Toi; T. Tokuzawa; Y. Torii; K. Tsumori; I. Yamada; S. Yamaguchi; S. Yamamoto; M. Yokoyama; Y. Yoshimura; T. Watari; K. Itoh; K. Matsuoka; K. Ohkubo; I. Ohtake; S. Satoh; T. Satow; S. Sudo; S. Tanahashi; T. Uda; Y. Hamada; O. Motojima; M. Fujiwara

2001-01-01T23:59:59.000Z

271

Investigations of swirl flames in a gas turbine model combustor  

SciTech Connect (OSTI)

A gas turbine model combustor for swirling CH{sub 4}/air diffusion flames at atmospheric pressure with good optical access for detailed laser measurements is discussed. Three flames with thermal powers between 7.6 and 34.9 kW and overall equivalence ratios between 0.55 and 0.75 were investigated. These behave differently with respect to combustion instabilities: Flame A burned stably, flame B exhibited pronounced thermoacoustic oscillations, and flame C, operated near the lean extinction limit, was subject to sudden liftoff with partial extinction and reanchoring. One aim of the studies was a detailed experimental characterization of flame behavior to better understand the underlying physical and chemical processes leading to instabilities. The second goal of the work was the establishment of a comprehensive database that can be used for validation and improvement of numerical combustion models. The flow field was measured by laser Doppler velocimetry, the flame structures were visualized by planar laser-induced fluorescence (PLIF) of OH and CH radicals, and the major species concentrations, temperature, and mixture fraction were determined by laser Raman scattering. The flow fields of the three flames were quite similar, with high velocities in the region of the injected gases, a pronounced inner recirculation zone, and an outer recirculation zone with low velocities. The flames were not attached to the fuel nozzle and thus were partially premixed before ignition. The near field of the flames was characterized by fast mixing and considerable finite-rate chemistry effects. CH PLIF images revealed that the reaction zones were thin (=<0.5 mm) and strongly corrugated and that the flame zones were short (h=<50 mm). Despite the similar flow fields of the three flames, the oscillating flame B was flatter and opened more widely than the others. In the current article, the flow field, structures, and mean and rms values of the temperature, mixture fraction, and species concentrations are discussed. Turbulence intensities, mixing, heat release, and reaction progress are addressed. In a second article, the turbulence-chemistry interactions in the three flames are treated.

Weigand, P.; Meier, W.; Duan, X.R.; Stricker, W.; Aigner, M. [Institut fuer Verbrennungstechnik, Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), Pfaffenwaldring 38, D-70569 Stuttgart (Germany)

2006-01-01T23:59:59.000Z

272

Energy biomass from large rangeland shrubs of the intermountain United States  

SciTech Connect (OSTI)

Large individual plants within a few species of rangeland shrubs were studied in several Intermountain States for their potential use in establishing biomass fuel energy plantations. Their locations were based on reports in the literature, suggestions from various range researchers, and personal knowledge. Biomass and other shrub physical characteristics plus site data were recorded for big sagebrush (Artemisia tridentata), fourwing saltbush (Atriplex canescens), big saltbush (A. lentiformis), greasewood (Sarcobatus vermiculatus), rubber rabbitbrush (Chrysothamnus nauseosus), and spreading rabbitbrush (C. linifolius) in 34 locations. Samples of current year's growth and woody tissue were analyzed for burning qualities (heat of combustion, sulfur, moisture, and ash content). Greatest biomass per plant of the individuals sampled was found in greasewood with fourwing saltbush, rubber rabbitbrush, and sagebrush following in decreasing order. Burning qualities varied among the species analyzed. The heat of combustion of the woody material from all shrubs was approximately 4500 Kcal/kg, but current year's growth varied considerably among species. (Refs. 15).

Van Epps, G.A.; Barker, J.R.; Makell, C.M.

1982-01-01T23:59:59.000Z

273

Computational modelling of transport phenomena in high energy materials processing application: large eddy simulation and parallelisation  

Science Journals Connector (OSTI)

A comprehensive three-dimensional numerical model is presented in order to address the coupled turbulent momentum, heat and species transport during molten metal-pool convection in association with continuous evolution of solid-liquid interface typically encountered in high energy materials processing applications. The turbulent aspect is handled by a large eddy simulation (LES) model and the phase changing phenomena is taken care of by a modified enthalpy-porosity technique. The proposed finite volume based LES model is subsequently parallelised for effective computational economy. To demonstrate the effectiveness of the present model, a systematic analysis is subsequently carried out to simulate a typical high power laser surface alloying process, where the effects of turbulent transport can actually be realised.

Dipankar Chatterjee

2011-01-01T23:59:59.000Z

274

Plasma assisted NO{sub x} reduction in existing coal combustors. Final report  

SciTech Connect (OSTI)

The feasibility of NO{sub x} reduction using plasma injection has been investigated. Both numerical and experimental methods were used in the development of this new NO{sub x}reduction technique. The numerical analysis was used to investigate various flow mechanisms in order to provide fundamental support in the development of this new NO{sub x} control technique. The calculations using this approach can give the information of the particle trajectories and distributions which are important for the design of the in-flame plasma injection configuration. The group model also established the necessary ground for further complete modeling of the whole process including the chemical kinetics. Numerical calculations were also performed for a turbulent gas flow field with variable properties. The results provided fundamental understanding of mixing effects encountered in the experiments at Pittsburgh Energy and Technology Center. A small scale experiment facility was designed and constructed at the heterogeneous combustion laboratory at Carnegie Mellon University. A series of tests were conducted in this setup to investigate the potential of the ammonia plasma injection for NO{sub x} reduction and parametric effects of this process. The experimental results are very promising. About 86% NO{sub x} reduction was achieved using ammonia radicals produced by argon plasma within the present test range. The total percentage of NO{sub x} reduction increases when ammonia flowrate, argon flow rate and initial NO concentration increase and when plasma power and the amount of excess air in the combustor decrease. A combined transport and reaction model was postulated for understanding the mechanism of NO{sub x} reduction using the plasma injection.

Yao, S.C.; Russell, T.

1991-12-31T23:59:59.000Z

275

==================== !"#$%&'()*+,-+./,0)12 Development of Micro Ejector for Butane Catalytic Combustor  

E-Print Network [OSTI]

combustion of the fuel then takes place in the ceramic chamber, and heat generated is used in various micro Combustor, Convergent-divergent Nozzle, Ejector, Back pressure. Fig. 1 Configuration of micro heat generation system. 1. Introduction In order to produce portable power generating devices from hydrocarbon

Kasagi, Nobuhide

276

Thermionic combustor application to combined gas and steam turbine power plants  

SciTech Connect (OSTI)

The engineering and economic feasibility of a thermionic converter topped combustor for a gas turbine is evaluated in this paper. A combined gas and steam turbine system was chosen for this study with nominal outputs of the gas and steam turbines of 70 MW and 30 MW, respectively. 7 refs.

Miskolczy, G.; Wang, C.C.; Lieb, D.P.; Margulies, A.E.; Fusegni, L.J.; Lovell, B.J.

1981-01-01T23:59:59.000Z

277

Green queue : a framework for selecting energy optimal DVFS congurations in large scale MPI applications  

E-Print Network [OSTI]

settings . . . . . Green Queue Energy Savings with VariousApplication Figure 4.3: Green Queue Energy Savings withBlind Scaling Relative Energy Green Queue Relative Delay

Peraza, Joshua

2012-01-01T23:59:59.000Z

278

NV Energy Large-Scale Photovoltaic Integration Study: Intra-Hour Dispatch and AGC Simulation  

SciTech Connect (OSTI)

The uncertainty and variability with photovoltaic (PV) generation make it very challenging to balance power system generation and load, especially under high penetration cases. Higher reserve requirements and more cycling of conventional generators are generally anticipated for large-scale PV integration. However, whether the existing generation fleet is flexible enough to handle the variations and how well the system can maintain its control performance are difficult to predict. The goal of this project is to develop a software program that can perform intra-hour dispatch and automatic generation control (AGC) simulation, by which the balancing operations of a system can be simulated to answer the questions posed above. The simulator, named Electric System Intra-Hour Operation Simulator (ESIOS), uses the NV Energy southern system as a study case, and models the system’s generator configurations, AGC functions, and operator actions to balance system generation and load. Actual dispatch of AGC generators and control performance under various PV penetration levels can be predicted by running ESIOS. With data about the load, generation, and generator characteristics, ESIOS can perform similar simulations and assess variable generation integration impacts for other systems as well. This report describes the design of the simulator and presents the study results showing the PV impacts on NV Energy real-time operations.

Lu, Shuai; Etingov, Pavel V.; Meng, Da; Guo, Xinxin; Jin, Chunlian; Samaan, Nader A.

2013-01-02T23:59:59.000Z

279

Nonequilibrium sulfur capture and retention in an air cooled slagging coal combustor. Quarterly technical progress report, 1996  

SciTech Connect (OSTI)

The objective of this 24 month project is to determine the degree of sulfur retention in slag in a full scale cyclone coal combustor with sulfur capture by calcium oxide sorbent injection into the combustor. This sulfur capture process consists of two steps: Capture of sulfur with calcined calcium oxide followed by impact of the reacted sulfur-calcium particles on the liquid slag lining the combustor. The sulfur bearing slag must be removed within several minutes from the combustor to prevent re-evolution of the sulfur from the slag. To accomplish this requires slag mass flow rates in the range of several 100 lb/hr. To study this two step process in the combustor, two groups of tests are being implemented. In the first group, calcium sulfate in the form of gypsum, or plaster of Paris, was injected in the combustor to determine sulfur evolution from slag. In the second group, the entire process is tested with limestone and/or calcium hydrate injected into the combustor. This entire effort consists of a series of up to 16 parametric tests in a 20 MMtu/hr slagging, air cooled, cyclone combustor. During the present quarterly reporting period ending September 30,1996, three tests in this project were implemented, bringing the total tests to 5. In addition, a total of 10 test days were completed during this quarter on the parallel project that utilizes the same 20 MMtu/hr combustor. The results of that project, especially those related to improved slagging performance, have a direct bearing on this project in assuring proper operation at the high slag flow rates that may be necessary to achieve high sulfur retention in slag.

Zauderer, B.

1996-11-01T23:59:59.000Z

280

Development of Energy Consumption Database Management System of Existing Large Public Buildings  

E-Print Network [OSTI]

The statistic data of energy consumption are the base of analyzing energy consumption. The scientific management method of energy consumption data and the development of database management system plays an important role in building energy...

Li, Y.; Zhang, J.; Sun, D.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Photometric redshifts for the Dark Energy Survey and VISTA and implications for large-scale structure  

Science Journals Connector (OSTI)

......Photometric redshifts for the Dark Energy Survey and VISTA and implications for...requirements for the proposed Dark Energy Survey (DES) using two sets of mock...of dark energy. The proposed Dark Energy Survey (DES) is one such experiment......

Manda Banerji; Filipe B. Abdalla; Ofer Lahav; Huan Lin

2008-05-21T23:59:59.000Z

282

High pressure test results of a catalytic combustor for gas turbine  

SciTech Connect (OSTI)

Recently, the use of gas turbine systems, such as combined cycle and cogeneration systems, has gradually increased in the world. But even when a clean fuel such as LNG (liquefied natural gas) is used, thermal NO{sub x} is generated in the high temperature gas turbine combustion process. The NO{sub x} emission from gas turbines is controlled through selective catalytic reduction processes (SCR) in the Japanese electric industry. If catalytic combustion could be applied to the combustor of the gas turbine, it is expected to lower NO{sub x} emission more economically. Under such high temperature and high pressure conditions, as in the gas turbine, however, the durability of the catalyst is still insufficient. So it prevents the realization of a high temperature catalytic combustor. To overcome this difficulty, a catalytic combustor combined with premixed combustion for a 1,300 C class gas turbine was developed. In this method, catalyst temperature is kept below 1,000 C, and a lean premixed gas is injected into the catalytic combustion gas. As a result, the load on the catalyst is reduced and it is possible to prevent the catalyst deactivation. After a preliminary atmospheric test, the design of the combustion was modified and a high pressure combustion test was conducted. As a result, it was confirmed that NO{sub x} emission was below 10 ppm (at 16 percent O{sub 2}) at a combustor outlet gas temperature of 1,300 C and that the combustion efficiency was almost 100%. This paper presents the design features and test results of the combustor.

Fujii, T.; Ozawa, Y.; Kikumoto, S.; Sato, M. [Central Research Inst. of Electric Power Industry, Yokosuka, Kanagawa (Japan); Yuasa, Y.; Inoue, H. [Kansai Electric Power Co., Inc., Amagasaki, Hyogo (Japan)

1998-07-01T23:59:59.000Z

283

Experiences on the Implementation of the 'Energy Balance' Methodology as a Data Quality Control Tool: Application to the Building Energy Consumption of a Large University Campus  

E-Print Network [OSTI]

EXPERIENCES ON THE IMPLEMENTATION OF THE “ENERGY BALANCE” METHODOLOGY AS A DATA QUALITY CONTROL TOOL: APPLICATION TO THE BUILDING ENERGY CONSUMPTION OF A LARGE UNIVERSITY CAMPUS Juan-Carlos Baltazar 1 , Ph.D. Research Associate Daniel... allow the engineers to identify and assess commissioning opportunities confidently. This paper presents the application of an innovative data screening methodology as a data quality control tool for energy consumption data. The methodology has...

Baltazar-Cervantes, J. C.; Sakurai, Y.; Masuda, H.; Feinauer, D.; Liu, J.; Ji, J.; Claridge, D. E.; Deng, S.; Bruner, H.

2007-01-01T23:59:59.000Z

284

Photometric Redshifts for the Dark Energy Survey and VISTA and Implications for Large Scale Structure  

SciTech Connect (OSTI)

We conduct a detailed analysis of the photometric redshift requirements for the proposed Dark Energy Survey (DES) using two sets of mock galaxy simulations and an artificial neural network code-ANNz. In particular, we examine how optical photometry in the DES grizY bands can be complemented with near infra-red photometry from the planned VISTA Hemisphere Survey (VHS) in the JHK{sub s} bands in order to improve the photometric redshift estimate by a factor of two at z > 1. We draw attention to the effects of galaxy formation scenarios such as reddening on the photo-z estimate and using our neural network code, calculate A{sub v} for these reddened galaxies. We also look at the impact of using different training sets when calculating photometric redshifts. In particular, we find that using the ongoing DEEP2 and VVDS-Deep spectroscopic surveys to calibrate photometric redshifts for DES, will prove effective. However we need to be aware of uncertainties in the photometric redshift bias that arise when using different training sets as these will translate into errors in the dark energy equation of state parameter, w. Furthermore, we show that the neural network error estimate on the photometric redshift may be used to remove outliers from our samples before any kind of cosmological analysis, in particular for large-scale structure experiments. By removing all galaxies with a 1{sigma} photo-z scatter greater than 0.1 from our DES+VHS sample, we can constrain the galaxy power spectrum out to a redshift of 2 and reduce the fractional error on this power spectrum by {approx}15-20% compared to using the entire catalogue.

Banerji, Manda; Abdalla, Filipe B.; Lahav, Ofer; /University Coll. London; Lin, Huan; /Fermilab

2007-11-01T23:59:59.000Z

285

Extracting the Acoustic pressure field from Large Eddy Simulation of confined reactive flows  

E-Print Network [OSTI]

and non-premixed open flames3,4 as well as in more complex cases such as gas turbine combustors must be large enough to include the sources of noise as well as part of the acoustic near field.6 VeryExtracting the Acoustic pressure field from Large Eddy Simulation of confined reactive flows Camilo

Nicoud, Franck

286

Green queue : a framework for selecting energy optimal DVFS congurations in large scale MPI applications  

E-Print Network [OSTI]

the future of energy-performance trade-off via dvfs in hpcinformed trade-offs in performance and energy consumption.trade-off. Many researchers have used DVFS to either reduce total energy

Peraza, Joshua

2012-01-01T23:59:59.000Z

287

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network [OSTI]

mp288 Magnetic Fusion Energy Materials High Energy Densitymaterials science, experimental validation enabled by targeted validation platforms, and high energymaterials needed to support a burning plasma environment; Pursue scientific opportunities and grand challenges in high energy

Gerber, Richard

2012-01-01T23:59:59.000Z

288

Master Plan and Energy Audits at a Large Texas Medical Campus  

E-Print Network [OSTI]

Energy Audits. The Master Plan summarized our methodology for disaggregation of historical energy use by building and end use. We also defined our proposed system for prioritizing buildings for the individual Detailed Building Energy Audits. We proposed a...

Simpson, K.; Stinson, M.; Haag, S.; Hart, M.

289

Large Scale Production Computing and Storage Requirements for High Energy Physics: Target 2017  

E-Print Network [OSTI]

Accelerator Laboratory Dark Energy Survey Data Analysis desDark Universe (cusp) 3) Dark Energy Survey (des, not coveredSurvey (BOSS), the Dark Energy Survey (DES), and the South

Gerber, Richard

2014-01-01T23:59:59.000Z

290

Initiation mechanisms of low-loss swept-ramp obstacles for deflagration to detonation transition in pulse detonation combustors .  

E-Print Network [OSTI]

??In order to enhance the performance of pulse detonation combustors (PDCs), an efficient deflagration-to-detonation transition (DDT) process is critical to maintain the thermodynamic benefits of… (more)

Myers, Charles B.

2009-01-01T23:59:59.000Z

291

Effect of temperature on reduction reactivity of oxygen carrier particles in a fixed bed chemical-looping combustor  

Science Journals Connector (OSTI)

In a chemical-looping combustor (CLC), gaseous fuel is oxidized...2...is separated from the exhaust gases during the combustion. In this study, NiO/bentonite particle...x formation during oxidation. Reactivity da...

Ho-Jung Ryu; Dal-Hee Bae; Gyoung-Tae Jin

2003-09-01T23:59:59.000Z

292

Thermal performance of a scramjet combustor operating at Mach 5.6 flight conditions. Final report, May 1996--May 1997  

SciTech Connect (OSTI)

This report describes the experimental data and the procedures used in acquiring and reducing the thermal loads data during tests of a hydrocarbon-fueled scramjet combustor at United Technologies Research Center (UTRC). This research effort is part of the UTRC effort to develop dual-mode scramjet combustor technology to support the development of Mach S missile technology. The objective of the thermal loads testing was to map the thermal and mechanical loads, including heat transfer, dynamic and static pressures, and skin friction in a scramjet combustor during direct-connect scramjet tests. The tests were conducted at the UTRC Ramject/Scramjet direct-connect combustor test facility in East Hartford, CT.

Stouffer, S.D.; Neumann, R.D.; Emmer, D.S.

1997-10-01T23:59:59.000Z

293

Low NO/sub x/ heavy fuel combustor concept program. Final report, 23 Oct 1979 - Jul 1981  

SciTech Connect (OSTI)

A gas turbine technology program to improve and optimize the staged rich lean low NOx combustor concept is described. Subscale combustor tests to develop the design information for optimization of the fuel preparation, rich burn, quick air quench, and lean burn steps of the combustion process were run. The program provides information for the design of high pressure full scale gas turbine combustors capable of providing environmentally clean combustion of minimally of minimally porcessed and synthetic fuels. It is concluded that liquid fuel atomization and mixing, rich zone stoichiometry, rich zone liner cooling, rich zone residence time, and quench zone stoichiometry are important considerations in the design and scale up of the rich lean combustor.

Russell, P.; Beal, G.; Hinton, B.

1981-10-01T23:59:59.000Z

294

Large Scale Production Computing and Storage Requirements for High Energy Physics: Target 2017  

E-Print Network [OSTI]

dark energy, dark matter, and inflation – point to future breakthrough discoveriesDriven Discovery for the Dark Universe (cusp) 3) Dark Energy

Gerber, Richard

2014-01-01T23:59:59.000Z

295

Large Scale Computing and Storage Requirements for Fusion Energy Sciences: Target 2017  

E-Print Network [OSTI]

19   8   Magnetic  Fusion  Energy  Science  (MFES)  Case  2017   8 Magnetic  Fusion  Energy  Science  (MFES)  Case  and   NERSC   Senior  Science  Advisor   Magnetic   Fusion  

Gerber, Richard

2014-01-01T23:59:59.000Z

296

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network [OSTI]

General Plasma Science Magnetic Fusion Energy Magneticfor  Fusion  Energy  Sciences   Magnetic  Fusion  Plasma  from the crosscutting science of magnetic reconnection and

Gerber, Richard

2012-01-01T23:59:59.000Z

297

Trends in Data Center Design - ASHRAE Leads the Way to Large Energy Savings (Presentation)  

SciTech Connect (OSTI)

Energy savings strategies for data centers are described, including best practices, ASHRAE standards, and examples of successful strategies for incorporating energy savings.

Van Geet, O.

2013-06-01T23:59:59.000Z

298

Methane Emissions from Large Dams as Renewable Energy Resources: A Developing Nation Perspective  

Science Journals Connector (OSTI)

By means of a theoretical model, bootstrap resampling and data provided by the International Commission On Large Dams (ICOLD (2003) World register of dams. http://www.icold-cigb.org) we found that global large da...

Ivan B. T. Lima; Fernando M. Ramos…

2008-02-01T23:59:59.000Z

299

A Parallel Statistical Learning Approach to the Prediction of Building Energy Consumption Based on Large Datasets  

E-Print Network [OSTI]

A Parallel Statistical Learning Approach to the Prediction of Building Energy Consumption Based consumption of buildings based on historical performances is an important approach to achieve energy consumption plays an important role in the total energy consumption of end use. Energy efficiency in building

Paris-Sud XI, Université de

300

A feasibility study of oil shale fired pulse combustors with applications to oil shale retorting. Final report  

SciTech Connect (OSTI)

The results of the experimental investigation performed to determine the feasibility of using pulverized Colorado oil shale to fuel a bench scale pulse combustor reveal that oil shale cannot sustain pulsations when used alone as fuel. Trace amounts of propane mixed with the oil shale enabled the pulsations, however. Up to 80% of the organic material in the oil shale was consumed when it was mixed with propane in the combustor. Beyond the feasibility objectives, the operating conditions of the combustor fuel with propane and mixtures of oil shale and propane were characterized with respect to pulsation amplitude and frequency and the internal combustor wall temperature over fuel lean and fuel rich stoichiometries. Maximum pressure excursions of 12.5 kPa were experienced in the combustor. Pulsation frequencies ranged from 50 to nearly 80 Hz. Cycle resolved laser Doppler anemometry velocities were measured at the tail pipe exit plane. Injecting inert mineral matter (limestone) into the pulse combustor while using propane fuel had only a slight effect on the pulsation frequency for the feed rates tested.

Morris, G.J.; Johnson, E.K.; Zhang, G.Q.; Roach, R.A.

1992-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Impact of Large Scale Energy Efficiency Programs On Consumer Tariffs and Utility Finances in India  

SciTech Connect (OSTI)

Large-scale EE programs would modestly increase tariffs but reduce consumers' electricity bills significantly. However, the primary benefit of EE programs is a significant reduction in power shortages, which might make these programs politically acceptable even if tariffs increase. To increase political support, utilities could pursue programs that would result in minimal tariff increases. This can be achieved in four ways: (a) focus only on low-cost programs (such as replacing electric water heaters with gas water heaters); (b) sell power conserved through the EE program to the market at a price higher than the cost of peak power purchase; (c) focus on programs where a partial utility subsidy of incremental capital cost might work and (d) increase the number of participant consumers by offering a basket of EE programs to fit all consumer subcategories and tariff tiers. Large scale EE programs can result in consistently negative cash flows and significantly erode the utility's overall profitability. In case the utility is facing shortages, the cash flow is very sensitive to the marginal tariff of the unmet demand. This will have an important bearing on the choice of EE programs in Indian states where low-paying rural and agricultural consumers form the majority of the unmet demand. These findings clearly call for a flexible, sustainable solution to the cash-flow management issue. One option is to include a mechanism like FAC in the utility incentive mechanism. Another sustainable solution might be to have the net program cost and revenue loss built into utility's revenue requirement and thus into consumer tariffs up front. However, the latter approach requires institutionalization of EE as a resource. The utility incentive mechanisms would be able to address the utility disincentive of forgone long-run return but have a minor impact on consumer benefits. Fundamentally, providing incentives for EE programs to make them comparable to supply-side investments is a way of moving the electricity sector toward a model focused on providing energy services rather than providing electricity.

Abhyankar, Nikit; Phadke, Amol

2011-01-20T23:59:59.000Z

302

Large (and Small) Energy Fluctuations in a Single Classical Degree of Freedom and the Second Law of Thermodynamics  

SciTech Connect (OSTI)

Energy fluctuations in a single classical degree of freedom above the ground state at thermodynamic equilibrium at temperature T are typically of average magnitude {approx}k{sub B}T. However, we show that the average magnitude of such fluctuations can be much larger (or much smaller) than k{sub B}T, indeed, that at least in principle it can be infinite (or arbitrarily close to 0). Nevertheless, the average energy fluctuation magnitude being untypically large (or untypically small) does not violate the second law of thermodynamics. For, if the average magnitude of energy fluctuations is much larger than k{sub B}T, then particle motion along the degree of freedom must manifest extreme spatial delocalization. The cost of locating the fluctuating particle along its degree of freedom equals or exceeds the large energy gain obtained upon finding it with an energy of much more than k{sub B}T above its ground state. The particle loses as much or more ability to do work via its spatial delocalization than it gains via the energy fluctuation. Similarly, if the average magnitude of energy fluctuations is much smaller than k{sub B}T, then the small energy yield obtainable upon locating the particle is compensated for by the small cost of locating it.

Denur, Jack [Electric and Gas Technology, Inc., 3233 West Kingsley Road, Garland, Texas 75041-2205 (United States)

2011-12-01T23:59:59.000Z

303

Implementing effect of energy efficiency supervision system for government office buildings and large-scale public buildings in China  

Science Journals Connector (OSTI)

The Chinese central government released a document to initiate a task of energy efficiency supervision system construction for government office buildings and large-scale public buildings in 2007, which marks the overall start of existing buildings energy efficiency management in China with the government office buildings and large-scale public buildings as a breakthrough. This paper focused on the implementing effect in the demonstration region all over China for less than one year, firstly introduced the target and path of energy efficiency supervision system, then described the achievements and problems during the implementing process in the first demonstration provinces and cities. A certain data from the energy efficiency public notice in some typical demonstration provinces and cities were analyzed statistically. It can be concluded that different functional buildings have different energy consumption and the average energy consumption of large-scale public buildings is too high in China compared with the common public buildings and residential buildings. The obstacles need to be overcome afterward were summarized and the prospects for the future work were also put forward in the end.

Jing Zhao; Yong Wu; Neng Zhu

2009-01-01T23:59:59.000Z

304

Combustion Instability and Blowout Characteristics of Fuel Flexible Gas Turbine Combustors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Combustion Instability and Blowout Combustion Instability and Blowout Characteristics of Fuel Flexible Gas Turbine Characteristics of Fuel Flexible Gas Turbine Combustors Combustors Georgia Institute of Technology Georgia Institute of Technology Tim Lieuwen, Ben Zinn Bobby Noble, Qingguo Zhang DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES SCIES Project 03-01-SR111 Project Awarded (07/01/03, 36 Month Duration) Total Contract Value $376,722 . CLEMSON presentation, T.L., B.Z., B.N., Q.Z. Gas Turbine Need Gas Turbine Need * Need: Gas turbines with sufficient flexibility to cleanly and efficiently combust a wide range of fuels, particularly coal-derived gases - Problem: Inherent variability in composition and heating

305

Advanced Sensor Approaches for Monitoring and Control of Gas Turbine Combustors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Seitzman and T. Lieuwen Seitzman and T. Lieuwen SCIES Project 02- 01- SR102 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (5/1/2002, 36 Month Duration) $337,501 Total Contract Value ($327,501 DOE) Advanced Sensor Approaches For Monitoring and Control Of Gas Turbine Combustors Georgia Institute of Technology JS/TL 10/19/05 Advanced Sensors 10/19/05 2 Gas Turbine Need * Gas turbines must operate with ultra-low levels of pollutant emissions - Problem: lean, premixed operation causes minimal pollutant generation but introduces combustion problems, such as instabilities and blowoff * Combustor health and performance information needed to optimize engine across competing demands of emissions levels, power output, and

306

Enhanced air/fuel mixing for automotive Stirling engine turbulator-type combustors  

SciTech Connect (OSTI)

This patent describes a combustor for use in a Stirling engine and the like. It comprises: a combustor chamber; a fuel inlet couple to the chamber to inject fuel therein; a turbulator means disposed in the chambers downstream of the fuel inlet means for injecting combustion air into the chamber, the turbulator means being so positioned to cause a mixing of the combustion air and fuel injected in the chamber; diverter means for dividing the combustion air and creating a primary mixing zone downstream fa the primary mixing zone; and wherein the primary mixing zone comprises a fuel rich zone where combustion initiates and the secondary mixing zone has sufficient combustion air to complete combustion of the fuel.

Riecke, G.T.; Stotts, R.E.

1992-02-25T23:59:59.000Z

307

Coal-derived syngas MILD combustion in parallel jet forward flow combustor  

Science Journals Connector (OSTI)

Abstract The effect of air-fuel momentum flux ratio on MILD (Moderate or Intense Low-oxygen Dilution) combustion of coal-derived syngas was examined in parallel jet forward flow combustor. The results were presented on flow field using non-reactive numerical simulations and on OH? radicals distribution and exhaust emissions using experiments. The predicted gas recirculation ratios in the combustor are high enough to establish the reaction condition of MILD scheme. Lower air-fuel momentum flux ratio associated with higher heat load benefits the drop of peak flame temperature and the increase of reaction zone volume. The critical air-fuel momentum flux ratios below which MILD combustion occurred were identified for three MILD configurations. The MILD configuration equipped with larger air nozzles and smaller fuel nozzles was observed to achieve MILD combustion at leaner condition. The MILD regime was established for syngas fuel with lean operational limit and ultra-low \\{NOx\\} and CO emissions.

Mingming Huang; Zhedian Zhang; Weiwei Shao; Yan Xiong; Yan Liu; Fulin Lei; Yunhan Xiao

2014-01-01T23:59:59.000Z

308

Topping of a combined gas- and steam-turbine powerplant using a TAM combustor  

SciTech Connect (OSTI)

The objective of this program is to evaluate the engineering and economic feasibility of a thermionic array module (TAM) topped combustor for a gas turbine. A combined gas- and steam-turbine system was chosen for this study. The nominal output of the gas and steam turbines were 70 MW and 30 MW, respectively. The gas-turbine fuel was a coal-derived medium-Btu gas assumed to be from an oxygen blown Texaco coal-gasification process which produces pressurized gas with an approximate composition of 52% CO and 36% H/sub 2/. Thermionic converters are assumed to line the walls of the gas-turbine combustor, so that the high-temperature gases heat the thermionic converter emitter. The thermionic converters produce electricity while the rejected heat is used to preheat the combustion air. To maximize the production of power from the thermionic converter, the highest practical flame temperature is obtained by preheating the combustor air with the thermionic collectors and rich combustion. A portion of the air, which bypassed the combustor, is reintroduced to complete the combustion at a lower temperature and the mixed gases flow to the turbine. The exhaust gases from the turbine flow to the heat recovery boilers to the bottoming steam cycle. The gas and steam turbine system performance calculation was based on data from Brown Boveri Turbomachinery, Inc. The performance of the thermionic converters (TAM) for the reference case was based on actual measurements of converters fired with a natural gas flame. These converters have been operated in a test furnace for approximately 15,000 device hours.

Miskolczy, G.; Wang, C.C.; Lovell, B.T.; McCrank, J.

1981-03-01T23:59:59.000Z

309

Cofiring Lignite with Hazelnut Shell and Cotton Residue in a Pilot-Scale Fluidized Bed Combustor  

Science Journals Connector (OSTI)

The absence of studies on cofiring of indigenous lignite with hazelnut shell/cotton residue blends in fluid bed combustors on one hand and the recent trend in utilization of biomass with local reserves in industry and utility boilers on the other necessitate investigation of combustion and emission characteristics of these fuel blends. ... However, the effect of recycle on gaseous emissions from combustion of Turkish lignites with high ash, volatile matter, and sulfur contents has not been investigated to date. ...

Zuhal Gogebakan; Nevin Selçuk

2008-03-26T23:59:59.000Z

310

The Planck Length Scale and Einstein Mass-Energy Obtained from the Sciama-Mach Large Number Relationship  

E-Print Network [OSTI]

If a physical significance should be attributed to the cosmological large number relationship obtained from Sciama's formulation of Mach's Principle, then a number of interesting physical conclusions may be drawn. The Planck length is naturally obtained as the amplitude of waves in a medium whose properties are implied by the relationship. The relativistic internal energy associated with a rest mass is explicitly related to the gravitational potential energy of the Universe, and consistency with the Einstein photon energy is demonstrated. Broader cosmological consequences of this formulation are addressed.

Scott Funkhouser

2003-09-25T23:59:59.000Z

311

Robust techniques for developing empirical models of fluidized bed combustors  

E-Print Network [OSTI]

This report is designed to provide a review of those data analysis techniques that are most useful for fitting m-dimensional empirical surfaces to very large sets of data. One issue explored is the improvement

Gruhl, Jim

312

Development of Gas Turbine Combustors for Low BTU Gas  

Science Journals Connector (OSTI)

Large-capacity combined cycles with high-temperature gas turbines burning petroleum fuel or LNG have already ... the other hand, as the power generation technology utilizing coal burning the coal gasification com...

I. Fukue; S. Mandai; M. Inada

1992-01-01T23:59:59.000Z

313

Reducing Plug and Process Loads for a Large Scale, Low Energy Office Building: NREL's Research Support Facility; Preprint  

SciTech Connect (OSTI)

This paper documents the design and operational plug and process load energy efficiency measures needed to allow a large scale office building to reach ultra high efficiency building goals. The appendices of this document contain a wealth of documentation pertaining to plug and process load design in the RSF, including a list of equipment was selected for use.

Lobato, C.; Pless, S.; Sheppy, M.; Torcellini, P.

2011-02-01T23:59:59.000Z

314

Researchers at the National Renewable Energy Laboratory (NREL) develop a high-fidelity large-eddy simulation model  

E-Print Network [OSTI]

to simulate events such as frontal passages through a wind plant and their effect on turbine power production-eddy simulation model designed to predict the performance of large wind plants with a higher degree of accuracy than current models. As the market for wind energy grows, wind turbines and wind plants are becoming

315

Understanding the Impact of Large-Scale Penetration of Micro Combined Heat & Power Technologies within Energy Systems  

E-Print Network [OSTI]

Understanding the Impact of Large-Scale Penetration of Micro Combined Heat & Power Technologies of Micro Combined Heat & Power Technologies within Energy Systems by Karen de los Ángeles Tapia for this purpose. Co-generation of electricity and heat at the residential level, known as micro

Catholic University of Chile (Universidad Católica de Chile)

316

Large Scale Computing and Storage Requirements for Basic Energy Sciences Research  

E-Print Network [OSTI]

February 9-10, 2010 DOE Office of Science Office of BasicDepartment of Energy, Office of Science, Advanced ScientificDirectors of the Office of Science, Office of Basic Energy

Gerber, Richard

2012-01-01T23:59:59.000Z

317

Impacts of large quantities of wind energy on the electric power system  

E-Print Network [OSTI]

Wind energy has been surging on a global scale. Significant penetration of wind energy is expected to take place in the power system, bringing new challenges because of the variability and uncertainty of this renewable ...

Yao, Yuan, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

318

Large Scale Computing and Storage Requirements for Fusion Energy Sciences: Target 2017  

E-Print Network [OSTI]

Fusion  Energy  Sciences:  Target  2017   4 Meeting  Background  and  Structure   In   support   of   its   mission   to   provide  

Gerber, Richard

2014-01-01T23:59:59.000Z

319

Development of a coal fired pulse combustor for residential space heating. Phase I, Final report  

SciTech Connect (OSTI)

This report presents the results of the first phase of a program for the development of a coal-fired residential combustion system. This phase consisted of the design, fabrication, testing, and evaluation of an advanced pulse combustor sized for residential space heating requirements. The objective was to develop an advanced pulse coal combustor at the {approximately} 100,000 Btu/hr scale that can be integrated into a packaged space heating system for small residential applications. The strategy for the development effort included the scale down of the feasibility unit from 1-2 MMBtu/hr to 100,000 Btu/hr to establish a baseline for isolating the effect of scale-down and new chamber configurations separately. Initial focus at the residential scale was concentrated on methods of fuel injection and atomization in a bare metal unit. This was followed by incorporating changes to the advanced chamber designs and testing of refractory-lined units. Multi-fuel capability for firing oil or gas as a secondary fuel was also established. Upon completion of the configuration and component testing, an optimum configuration would be selected for integrated testing of the pulse combustor unit. The strategy also defined the use of Dry Ultrafine Coal (DUC) for Phases 1 and 2 of the development program with CWM firing to be a product improvement activity for a later phase of the program.

NONE

1988-04-01T23:59:59.000Z

320

Investigation of Heat Transfer and Combustion in the Advanced Fluidized Bed Combustor (FBC).  

SciTech Connect (OSTI)

This technical report summarizes the research conducted and progress achieved during the period from April 1, 1997 to June 30, 1997. The exploratory hot model was modified to explore the operational limits, fuel flexibility, and the role of heat transfer in combustion control. Eight air injection nozzles were newly designed to set different angles. Three runs of independently controllable water-cooling tubes were arranged to study the local heat transfer characteristics along the flow direction of the combustor height. The fuel nozzle was carefully designed to improve the fuel atomization quality. The igniter system was designed to safe and dependable ignition. According to the established safety and health guideline, the auxiliary subsystems are inspected carefully. All instruments are checked and calibrated for the system test. The combustion test result was analyzed to understand thermal performance and heat transfer characteristics. The flame enthalpy decreased along the combustor height. The heat is removed by the cooling water at different zones during the combustion test. The axial variation of heat transfer coefficient was predicted. The heat transfer coefficient is generally lower in the top area than in the bottom of the combustor.

Lee, S.W.

1997-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

The Riesz energy of the Nth roots of unity: an asymptotic expansion for large N  

Science Journals Connector (OSTI)

......Chebyshev constant and energy on locally compact...figures (Macmillan, New York, 1964). 8. M. G otz, `On the Riesz energy of measures', J...theory (Springer, New York, 1972). 14. A...minimal discrete Riesz energy on curves in Rd......

J. S. Brauchart; D. P. Hardin; E. B. Saff

2009-08-01T23:59:59.000Z

322

The Design of a Large Booster Ring for the Medium Energy Electron-Ion Collider at Jlab  

SciTech Connect (OSTI)

In this paper, we present the current design of the large booster ring for the Medium energy Electron-Ion Collider at Jefferson Lab. The booster ring takes 3 GeV protons or ions of equivalent rigidity from a pre-booster ring, and accelerates them to 20 GeV for protons or equivalent energy for light to heavy ions before sending them to the ion collider ring. The present design calls for a figure-8 shape of the ring for superior preservation of ion polarization. The ring is made of warm magnets and shares a tunnel with the two collider rings. Acceleration is achieved by warm RF systems. The linear optics has been designed with the transition energy above the highest beam energy in the ring so crossing of transition energy will be avoided. Preliminary beam dynamics studies including chromaticity compensation are presented in this paper.

Edward Nissen, Todd Satogata, Yuhong Zhang

2012-07-01T23:59:59.000Z

323

U. S. Industrial Energy Consumption and Conservation: Past and Future Perspectives  

E-Print Network [OSTI]

-bed combustors and medium Btu gasifiers to enable use of coal for gas turbines. Motors. Another partly developed technology which may have a major impact on industrial energy is motor controls. Although small motors are often remarkably inefficient, most...-bed combustors and medium Btu gasifiers to enable use of coal for gas turbines. Motors. Another partly developed technology which may have a major impact on industrial energy is motor controls. Although small motors are often remarkably inefficient, most...

Ganeriwal, R; Ross, M. H.

1980-01-01T23:59:59.000Z

324

First U.S. Large-Scale CO2 Storage Project Advances | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

First U.S. Large-Scale CO2 Storage Project Advances First U.S. Large-Scale CO2 Storage Project Advances First U.S. Large-Scale CO2 Storage Project Advances April 6, 2009 - 1:00pm Addthis Washington, DC - Drilling nears completion for the first large-scale carbon dioxide (CO2) injection well in the United States for CO2 sequestration. This project will be used to demonstrate that CO2 emitted from industrial sources - such as coal-fired power plants - can be stored in deep geologic formations to mitigate large quantities of greenhouse gas emissions. The Archer Daniels Midland Company (ADM) hosted an event April 6 for a CO2 injection test at their Decatur, Ill. ethanol facility. The injection well is being drilled into the Mount Simon Sandstone to a depth more than a mile beneath the surface. This is the first drilling into the sandstone geology

325

Effects of Combustor Geometry on the Flowfields and Flame Properties of A  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Effects of Combustor Geometry on the Flowfields and Flame Properties of A Effects of Combustor Geometry on the Flowfields and Flame Properties of A Low-Swirl Injector Title Effects of Combustor Geometry on the Flowfields and Flame Properties of A Low-Swirl Injector Publication Type Journal Article Year of Publication 2008 Authors Cheng, Robert K., and David Littlejohn Journal Proceedings of the Combustion Institute Type of Article Conference Paper Abstract The Low-swirl injector (LSI) is a novel dry-low NOx combustion method that is being developed for gas turbines to burn a variety of gaseous fuels including natural gas, low-Btu fuels, syngases and hydrogen. Its basic principle is described by a top level analytical model that relates the flame position to the flowfield similarity parameters and the turbulent flame speed correlation. The model was based on experimental measurements in open laboratory flames. It has been useful for guiding hardware development. As the LSI is being adapted to different engine configurations, one open question is how the combustor geometry and size affect its basic operating principle. The objective of this paper is to investigate these effects by conducting Particle Image Velocimetry (PIV) measurements in open and enclosed flames produced by a 6.35 cm diameter LSI using two quartz cylinders of 15.5 and 20 cm diameter to simulate the combustor casing. Results from 18 methane-air flames show that the enclosures do not alter the flame properties or the nearfield flow structures. The differences occur mostly in the farfield where the tighter enclosure deters the formation of a weak recirculation zone. The enclosure effects on hydrogen and hydrogen-methane flames were studies using the 20 cm cylinder. The results show that the outer recirculation zone generated at the corner of the dump plane promotes the formation of attached flames. However, the properties and nearfield flow features of the attached flames are similar to those of the lifted flames. At higher stoichiometries, the attached flame collapses to form a compact disc shaped flame that has very different flowfield structures. These results show that the enclosure effects on the LSI are strongly coupled to the fuel type and dump plane geometry but are less dependent on the enclosure size. These observations will provide the basis for developing computational methods that can be used as design tools for LSI adaptation

326

Impact of Large Scale Energy Efficiency Programs On Consumer Tariffs and Utility Finances in India  

E-Print Network [OSTI]

India. Prayas. (2005). Demand-Side Management (DSM) in theEnergy Efficiency and Demand Side Management (DSM). PlanningDemand Growth Demand Side Management Delhi Transco Limited

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

327

Enhanced sampling method for free energy calculation and large scale conformational change.  

E-Print Network [OSTI]

??A method of directly computing the partition function (or the corresponding free energy) and accelerating configurational sampling is developed. In an expanded ensemble, the method… (more)

Zhang, Cheng

2009-01-01T23:59:59.000Z

328

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network [OSTI]

Energy Stephane Ethier Princeton Plasma Physics Laboratoryof New Hampshire MIT Princeton Plasma Physics LaboratoryLudlow Auburn University Princeton Plasma Physics Laboratory

Gerber, Richard

2012-01-01T23:59:59.000Z

329

Property:Building/SPBreakdownOfElctrcityUseKwhM2LargeKitchens | Open Energy  

Open Energy Info (EERE)

LargeKitchens LargeKitchens Jump to: navigation, search This is a property of type String. Large kitchens Pages using the property "Building/SPBreakdownOfElctrcityUseKwhM2LargeKitchens" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 0.763086941039 + Sweden Building 05K0002 + 0.0 + Sweden Building 05K0003 + 0.0 + Sweden Building 05K0004 + 0.409356725146 + Sweden Building 05K0005 + 2.13953488372 + Sweden Building 05K0006 + 0.383200490497 + Sweden Building 05K0007 + 3.38701556508 + Sweden Building 05K0008 + 0.0 + Sweden Building 05K0009 + 0.294507436313 + Sweden Building 05K0010 + 0.0 + Sweden Building 05K0011 + 0.177556818182 + Sweden Building 05K0012 + 0.0953379731147 + Sweden Building 05K0013 + 0.0 + Sweden Building 05K0014 + 0.0 +

330

Property:Building/SPElectrtyUsePercLargeComputersServers | Open Energy  

Open Energy Info (EERE)

SPElectrtyUsePercLargeComputersServers SPElectrtyUsePercLargeComputersServers Jump to: navigation, search This is a property of type String. Large computers / servers Pages using the property "Building/SPElectrtyUsePercLargeComputersServers" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 4.04016909393 + Sweden Building 05K0002 + 0.0 + Sweden Building 05K0003 + 0.0 + Sweden Building 05K0004 + 5.91955840631 + Sweden Building 05K0005 + 1.27160904517 + Sweden Building 05K0006 + 1.81235608552 + Sweden Building 05K0007 + 17.4089448462 + Sweden Building 05K0008 + 0.0 + Sweden Building 05K0009 + 0.983508828426 + Sweden Building 05K0010 + 6.66995976895 + Sweden Building 05K0011 + 1.71269481591 + Sweden Building 05K0012 + 2.03730351612 + Sweden Building 05K0013 + 0.0 +

331

Property:Building/SPElectrtyUsePercLargeKitchens | Open Energy Information  

Open Energy Info (EERE)

SPElectrtyUsePercLargeKitchens SPElectrtyUsePercLargeKitchens Jump to: navigation, search This is a property of type String. Large kitchens Pages using the property "Building/SPElectrtyUsePercLargeKitchens" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 1.06788610412 + Sweden Building 05K0002 + 0.0 + Sweden Building 05K0003 + 0.0 + Sweden Building 05K0004 + 0.620003623604 + Sweden Building 05K0005 + 3.89960107186 + Sweden Building 05K0006 + 0.586902877434 + Sweden Building 05K0007 + 5.16783391945 + Sweden Building 05K0008 + 0.0 + Sweden Building 05K0009 + 0.520871109218 + Sweden Building 05K0010 + 0.0 + Sweden Building 05K0011 + 0.645617768363 + Sweden Building 05K0012 + 0.25093035055 + Sweden Building 05K0013 + 0.0 + Sweden Building 05K0014 + 0.0 +

332

Interaction Energy of Large Molecules from Restrained Denominator MP2-F12  

Science Journals Connector (OSTI)

All the interaction energies of the S66 test set, the Cartesian coordinates of the polyaromatic hydrocarbons and C60 monomers, and the basis set and grid size dependences of the interaction energy of fullerene dimer. ... limit convergence, and overall this scheme promises energetic properties for realistic periodic and extended systems which existing methods do not possess. ...

Yu-ya Ohnishi; Kazuya Ishimura; Seiichiro Ten-no

2014-10-06T23:59:59.000Z

333

Energy Department Accepting Small Business Grant Applications for Large Wind Turbines  

Broader source: Energy.gov [DOE]

The Energy Department began accepting applications on November 24 for its FY 2015 Phase 1 grant topics, including a Wind Program topic, under the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs to help small businesses develop and deliver market-driven clean energy technologies.

334

A Large-scale Study on Predicting and Contextualizing Building Energy Usage J. Zico Kolter  

E-Print Network [OSTI]

about their home, to deter- mine how their consumption compares to that of simi- lar buildings energy consumption (Darby 2006; Neenan and Robinson 2009). Recent research has specifi- cally highlighted and neighbors (Cialdini and Schultz 2004; Allcott 2010). In this paper, we present a study of energy consumption

Kolter, J. Zico

335

Constraint Programming Based Large Neighbourhood Search for Energy Minimisation in Data Centres  

E-Print Network [OSTI]

on optimising energy consumption in data centres. We study the problem formulation proposed by Energe be attributed to the performance of productive computation [7]. Therefore, one of the optimisation challenges. In this paper we describe a constraint optimisation model for energy-cost aware data centre assignment systems

Paris-Sud XI, Université de

336

High-yield maize with large net energy yield and small global warming intensity  

Science Journals Connector (OSTI)

...from a previous life cycle assessment...pumping rather than diesel or natural gas, fine-tuning...actual baseline. General Discussion. Increasing...be natural gas, diesel, and electricity...energy per liter of diesel (43 MJ·L-1...Improvements in life-cycle energy efficiency...

Patricio Grassini; Kenneth G. Cassman

2012-01-01T23:59:59.000Z

337

The Harvard Clean Energy Project: Large-Scale Computational Screening and Design of Organic Photovoltaics on the World Community Grid  

Science Journals Connector (OSTI)

The Harvard Clean Energy Project: Large-Scale Computational Screening and Design of Organic Photovoltaics on the World Community Grid ... The Clean Energy Project stands out from other computational materials science approaches as it combines conventional modeling with strategies from modern drug discovery:(54-61) CEP features an automated, high-throughput infrastructure for a systematic screening of millions of OPV candidates at a first-principles electronic structure level. ... We have developed four new functionals that overcome the above-mentioned difficulties: (a) M06, a hybrid meta functional, is a functional with good accuracy "across-the-board" for transition metals, main group thermochem., medium-range correlation energy, and barrier heights; (b) M06-2X, another hybrid meta functional, is not good for transition metals but has excellent performance for main group chem., predicts accurate valence and Rydberg electronic excitation energies, and is an excellent functional for arom.-arom. ...

Johannes Hachmann; Roberto Olivares-Amaya; Sule Atahan-Evrenk; Carlos Amador-Bedolla; Roel S. Sa?nchez-Carrera; Aryeh Gold-Parker; Leslie Vogt; Anna M. Brockway; Ala?n Aspuru-Guzik

2011-08-22T23:59:59.000Z

338

Energy Use Intensity and its Influence on the Integrated Daylighting Design of a Large Net Zero Energy Building: Preprint  

SciTech Connect (OSTI)

Net-zero energy buildings generate as much energy as they consume and are significant in the sustainable future of building design and construction. The role of daylighting (and its simulation) in the design process becomes critical. In this paper we present the process the National Renewable Energy Laboratory embarked on in the procurement, design, and construction of its newest building, the Research Support Facility (RSF) - particularly the roles of daylighting, electric lighting, and simulation. With a rapid construction schedule, the procurement, design, and construction had to be tightly integrated; with low energy use. We outline the process and measures required to manage a building design that could expect to operate at an efficiency previously unheard of for a building of this type, size, and density. Rigorous simulation of the daylighting and the electric lighting control response was a given, but the oft-ignored disconnect between lighting simulation and whole-building energy use simulation had to be addressed. The RSF project will be thoroughly evaluated for its performance for one year; preliminary data from the postoccupancy monitoring efforts will also be presented with an eye toward the current efficacy of building energy and lighting simulation.

Guglielmetti , R.; Scheib, J.; Pless, S. D.; Torcellini , P.; Petro, R.

2011-03-01T23:59:59.000Z

339

High energy second-harmonic generation of Nd:glass laser radiation with large aperture CsLiB6O10 crystals  

Science Journals Connector (OSTI)

We have demonstrated the generation of a high-energy green laser pulse using large aperture CsLiB6O10 (CLBO) crystals for the first time to our knowledge. A pulsed energy of 25 J at...

Kiriyama, Hiromitsu; Inoue, Norihiro; Yamakawa, Koichi

2002-01-01T23:59:59.000Z

340

Effects of Combustion-Induced Vortex Breakdown on Flashback Limits of Syngas-Fueled Gas Turbine Combustors  

SciTech Connect (OSTI)

Turbine combustors of advanced power systems have goals to achieve very low pollutants emissions, fuel variability, and fuel flexibility. Future generation gas turbine combustors should tolerate fuel compositions ranging from natural gas to a broad range of syngas without sacrificing operational advantages and low emission characteristics. Additionally, current designs of advanced turbine combustors use various degrees of swirl and lean premixing for stabilizing flames and controlling high temperature NOx formation zones. However, issues of fuel variability and NOx control through premixing also bring a number of concerns, especially combustor flashback and flame blowout. Flashback is a combustion condition at which the flame propagates upstream against the gas stream into the burner tube. Flashback is a critical issue for premixed combustor designs, because it not only causes serious hardware damages but also increases pollutant emissions. In swirl stabilized lean premixed turbine combustors onset of flashback may occur due to (i) boundary layer flame propagation (critical velocity gradient), (ii) turbulent flame propagation in core flow, (iii) combustion instabilities, and (iv) upstream flame propagation induced by combustion induced vortex breakdown (CIVB). Flashback due to first two foregoing mechanisms is a topic of classical interest and has been studied extensively. Generally, analytical theories and experimental determinations of laminar and turbulent burning velocities model these mechanisms with sufficient precision for design usages. However, the swirling flow complicates the flashback processes in premixed combustions and the first two mechanisms inadequately describe the flashback propensity of most practical combustor designs. The presence of hydrogen in syngas significantly increases the potential for flashback. Due to high laminar burning velocity and low lean flammability limit, hydrogen tends to shift the combustor operating conditions towards flashback regime. Even a small amount of hydrogen in a fuel blend triggers the onset of flashback by altering the kinetics and thermophysical characteristics of the mixture. Additionally, the presence of hydrogen in the fuel mixture modifies the response of the flame to the global effects of stretch and preferential diffusion. Despite its immense importance in fuel flexible combustor design, little is known about the magnitude of fuel effects on CIVB induced flashback mechanism. Hence, this project investigates the effects of syngas compositions on flashback resulting from combustion induced vortex breakdown. The project uses controlled experiments and parametric modeling to understand the velocity field and flame interaction leading to CIVB driven flashback.

Ahsan Choudhuri

2011-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

DOE_EnergyEfficiencyStandardsForLargeVolumeWaterHeaters.pdf  

Broader source: Energy.gov (indexed) [DOE]

September 6, 2012 September 6, 2012 Scott Baker Sr. Business Solutions Analyst Bakers1@pjm.com (610) 666-2235 VIA EMAIL U.S. Department of Energy Email: expartecommunications@hq.doe.gov RE: Ex Parte Communication, Docket EERE-2012-BT-STD-0022 To whom it may concern, On September 5, 2012, representatives from PJM Interconnection LLC, National Rural Electric Cooperatives Association, Edison Electric Institute, American Public Power Association, and the Steffes Corporation (together, "Joint Commenters") met with members of the Department of Energy ("Department") to discuss the request for information "[...] Energy

342

Assessment of Rich-Burn, Quick-Mix, Lean-Burn Trapped Vortex Combustor for Stationary Gas Turbines  

SciTech Connect (OSTI)

This paper describes the evaluation of an alternative combustion approach to achieve low emissions for a wide range of fuel types. This approach combines the potential advantages of a staged rich-burn, quick-mix, lean-burn (RQL) combustor with the revolutionary trapped vortex combustor (TVC) concept. Although RQL combustors have been proposed for low-Btu fuels, this paper considers the application of an RQL combustor for high-Btu natural gas applications. This paper will describe the RQL/TVC concept and experimental results conducted at 10 atm (1013 kPa or 147 psia) and an inlet-air temperature of 644 K (700°F). The results from a simple network reactor model using detailed kinetics are compared to the experimental observations. Neglecting mixing limitations, the simplified model suggests that NOx and CO performance below 10 parts per million could be achieved in an RQL approach. The CO levels predicted by the model are reasonably close to the experimental results over a wide range of operating conditions. The predicted NOx levels are reasonably close for some operating conditions; however, as the rich-stage equivalence ratio increases, the discrepancy between the experiment and the model increases. Mixing limitations are critical in any RQL combustor, and the mixing limitations for this RQL/TVC design are discussed.

Douglas L. Straub; Kent H. Casleton; Robie E. Lewis; Todd G. Sidwell; Daniel J. Maloney; George A. Richards

2005-01-01T23:59:59.000Z

343

Large-Eddy Simulation of a Supersonic Inlet-Isolator Heeseok Koo  

E-Print Network [OSTI]

in a dual-mode scramjet engine that provides stable compressed flow to the combustor. However in the design of robust scramjet engines. Here, the predictive capability of the large ramjet engines are vital for the realization of hypersonic flight. Scramjets are relatively simple

Raman, Venkat

344

A Practical Approach to Energy Management in a Large Petrochemical Manufacturing Facility  

E-Print Network [OSTI]

The largest of Chevron Phillips Chemical Company's 34 chemical manufacturing facilities, the Cedar Bayou Plant located in Baytown, TX, undertook the task of creating a facility-wide energy management and improvement program in 2004. The Cedar Bayou...

Ackley, A.

2005-01-01T23:59:59.000Z

345

Rule-Based Energy Management System Applied to Large Industrial Facilities  

E-Print Network [OSTI]

Deregulation of electricity and rising fuel costs are causing renewed interest in Energy Management Systems (EMS). This paper details the results of integrating a rule-based EMS controller at a Pulp and Paper Mill and additional findings from...

Gauthier, M.; Childress, R. L.

346

State-of-the-Art Thermal Energy Storage Retrofit at a Large Manufacturing Facility  

E-Print Network [OSTI]

This paper will describe the existing conditions, strategic planning, feasibility study, economic analysis, design, specification, construction, and project management for the 2.9 megawatt “full shift” chilled water thermal energy storage retrofit...

Fiorino, D.

347

Indoor Conditions Study and Impact on the Energy Consumption for a Large Commercial Building  

E-Print Network [OSTI]

that were studied using dynamic simulations. The article provides interesting insights of the building indoor conditions (summer/winter comfort), humidity, air temperature, mean operative temperature and energy consumption using hourly climate data. A...

Catalina, T.

2011-01-01T23:59:59.000Z

348

Large Scale Computing and Storage Requirements for Fusion Energy Sciences: Target 2017  

E-Print Network [OSTI]

damage   in   fusion  reactors  is  tritium  retention.  a   reliable   fusion   energy   reactor,   small-­?scale  reactor   components   and   ultimately   the   development   of   high-­? performance,   radiation   resistant   materials   for   advanced   nuclear   fission   and   fusion  

Gerber, Richard

2014-01-01T23:59:59.000Z

349

Steam driven large multi effect MVC (SD MVC) desalination process for lower energy consumption and desalination costs  

Science Journals Connector (OSTI)

It has been published and demonstrated in operating plants that the low-temperature multi effect desalination process (LT MED) when operated on turbine backpressure steam requires minimal energy consumption yielding specific desalination energy costs approaching values of optimal RO energy costs. However due to variations in electricity demand, the operation of large steam turbines at base load is in most cases impractical. As a result, in order to allow variations in electricity supply and full capacity of the desalination extraction, steam extracted from the turbines at higher pressures than the back pressure is commonly used. The extraction steam pressure of these turbines is in the range of 1.5–4.5 barg. (Typically as required for process steam at refineries and for MSF desalination plants). The LT MED process when utilizing such extraction steam incorporates thermo compressors (steam ejectors) in order to take advantage of the excessive extraction steam pressure, thereby increasing the economy ratio of the MED (decreasing energy consumption). Thermo compressors (ejectors) as a rule have a relatively low adiabatic efficiency, thus limiting the potential of the MED to increase the economy ratio even more. In this paper an approach of using a novel large centrifugal compressor driven by an auxiliary steam turbine utilizing the extraction steam is incorporated instead of the thermo compressor for large LT MED plants. The centrifugal compressor and auxiliary turbine having a much higher efficiency than the thermo compressor results in significant energy savings, thus lowering the desalination costs. This paper will also describe the thermodynamic advantages, the specific investment and desalination costs comparison, and the resulting desalination cost reduction potential of the steam-driven multi effect MVC process.

A. Ophir; A. Gendel

2007-01-01T23:59:59.000Z

350

90.1 Prototype Building Models Large Hotel | Building Energy Codes Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hotel Hotel The ASHRAE Standard 90.1 prototype building models were developed by Pacific Northwest National Laboratory in support of the U.S. Department of Energy's (DOE's) Building Energy Codes Program. These prototype buildings were derived from DOE's Commercial Reference Building Models. This suite of ASHRAE Standard 90.1 prototype buildings covers all the Reference Building types except supermarket, and also adds a new building prototype representing high-rise apartment buildings.The prototype models include 16 building types in 17 climate locations for ASHRAE Standards 90.1-2004, 90.1-2007 and 90.1-2010. This combination leads to a set of 816 building models (in EnergyPlus Version 6.0). Also included is a scorecard for each prototype building. The scorecard is a spreadsheet that summarizes the

351

90.1 Prototype Building Models Large Office | Building Energy Codes Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Office Office The ASHRAE Standard 90.1 prototype building models were developed by Pacific Northwest National Laboratory in support of the U.S. Department of Energy's (DOE's) Building Energy Codes Program. These prototype buildings were derived from DOE's Commercial Reference Building Models. This suite of ASHRAE Standard 90.1 prototype buildings covers all the Reference Building types except supermarket, and also adds a new building prototype representing high-rise apartment buildings.The prototype models include 16 building types in 17 climate locations for ASHRAE Standards 90.1-2004, 90.1-2007 and 90.1-2010. This combination leads to a set of 816 building models (in EnergyPlus Version 6.0). Also included is a scorecard for each prototype building. The scorecard is a spreadsheet that summarizes the

352

NETL: News Release - Energy Department Awards $66.7 Million for Large-Scale  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

29, 2008 29, 2008 DOE Report: Alaska North Slope Has Plenty of Potential Report Examines Future of Oil and Natural Gas Resources in Arctic Alaska Washington, D.C. - The U.S. Department of Energy's Office of Fossil Energy has issued a comprehensive new report Alaska North Slope Oil and Gas: A Promising Future or an Area in Decline? To answer this question, the report examines the potential for Arctic Alaska to remain a major contributor to the Nation's domestic energy supply under different development scenarios. MORE INFO Read the Summary Report [PDF-3MB] Read the Full Report [PDF-7MB] Future projections were viewed from two perspectives, an oil-centered near term (2005 to 2015) and a long term (2015 to 2050) marked by the emergence of gas as a major factor in exploration and development activities. Key

353

Large low-energy $M1$ strength for $^{56,57}$Fe within the nuclear shell model  

E-Print Network [OSTI]

A strong enhancement at low $\\gamma$-ray energies has recently been discovered in the $\\gamma$-ray strength function of $^{56,57}$Fe. In this work, we have for the first time obtained theoretical $\\gamma$ decay spectra for states up to $\\approx 8$ MeV in excitation for $^{56,57}$Fe. We find large $B(M1)$ values for low $\\gamma$-ray energies that provide an explanation for the experimental observations. The role of mixed $E2$ transitions for the low-energy enhancement is addressed theoretically for the first time, and it is found that they contribute a rather small fraction. Our calculations clearly show that the high-$\\ell$ ($=f$) diagonal terms are most important for the strong low-energy $M1$ transitions. As such types of $0\\hbar\\omega$ transitions are expected for all nuclei, our results indicate that a low-energy $M1$ enhancement should be present throughout the nuclear chart. This could have far-reaching consequences for our understanding of the $M1$ strength function at high excitation energies, with profound implications for astrophysical reaction rates.

B. Alex Brown; A. C. Larsen

2014-09-11T23:59:59.000Z

354

Large Scale Computing and Storage Requirements for Fusion Energy Sciences: Target 2017  

SciTech Connect (OSTI)

The National Energy Research Scientific Computing Center (NERSC) is the primary computing center for the DOE Office of Science, serving approximately 4,500 users working on some 650 projects that involve nearly 600 codes in a wide variety of scientific disciplines. In March 2013, NERSC, DOE?s Office of Advanced Scientific Computing Research (ASCR) and DOE?s Office of Fusion Energy Sciences (FES) held a review to characterize High Performance Computing (HPC) and storage requirements for FES research through 2017. This report is the result.

Gerber, Richard

2014-05-02T23:59:59.000Z

355

Scenario Development and Analysis of Hydrogen as a Large-Scale Energy Storage Medium (Presentation)  

SciTech Connect (OSTI)

The conclusions from this report are: (1) hydrogen has several important advantages over competing technologies, including - very high storage energy density (170 kWh/m{sup 3} vs. 2.4 for CAES and 0.7 for pumped hydro) which allows for potential economic viability of above-ground storage and relatively low environmental impact in comparison with other technologies; and (2) the major disadvantage of hydrogen energy storage is cost but research and deployment of electrolyzers and fuel cells may reduce cost significantly.

Steward, D. M.

2009-06-10T23:59:59.000Z

356

Large two-dimensional electronic systems: Self-consistent energies and densities at low cost  

Science Journals Connector (OSTI)

We derive a self-consistent local variant of the Thomas-Fermi approximation for (quasi-) two-dimensional (2D) systems by localizing the Hartree term. The scheme results in an explicit orbital-free representation of the electron density and energy in terms of the external potential, the number of electrons, and the chemical potential determined upon normalization. We test the method over a variety 2D nanostructures by comparing to the Kohn-Sham 2D local-density approximation (LDA) calculations up to 600 electrons. Accurate results are obtained in view of the negligible computational cost. We also assess a local upper bound for the Hartree energy.

E. Räsänen; S. Pittalis; G. Bekçio?lu; I. Makkonen

2013-01-31T23:59:59.000Z

357

Mercury emissions during cofiring of sub-bituminous coal and biomass (chicken waste, wood, coffee residue, and tobacco stalk) in a laboratory-scale fluidized bed combustor  

SciTech Connect (OSTI)

Four types of biomass (chicken waste, wood pellets, coffee residue, and tobacco stalks) were cofired at 30 wt % with a U.S. sub-bituminous coal (Powder River Basin Coal) in a laboratory-scale fluidized bed combustor. A cyclone, followed by a quartz filter, was used for fly ash removal during tests. The temperatures of the cyclone and filter were controlled at 250 and 150{sup o}C, respectively. Mercury speciation and emissions during cofiring were investigated using a semicontinuous mercury monitor, which was certified using ASTM standard Ontario Hydra Method. Test results indicated mercury emissions were strongly correlative to the gaseous chlorine concentrations, but not necessarily correlative to the chlorine contents in cofiring fuels. Mercury emissions could be reduced by 35% during firing of sub-bituminous coal using only a quartz filter. Cofiring high-chlorine fuel, such as chicken waste (Cl = 22340 wppm), could largely reduce mercury emissions by over 80%. When low-chlorine biomass, such as wood pellets (Cl = 132 wppm) and coffee residue (Cl = 134 wppm), is cofired, mercury emissions could only be reduced by about 50%. Cofiring tobacco stalks with higher chlorine content (Cl = 4237 wppm) did not significantly reduce mercury emissions. Gaseous speciated mercury in flue gas after a quartz filter indicated the occurrence of about 50% of total gaseous mercury to be the elemental mercury for cofiring chicken waste, but occurrence of above 90% of the elemental mercury for all other cases. Both the higher content of alkali metal oxides or alkali earth metal oxides in tested biomass and the occurrence of temperatures lower than 650{sup o}C in the upper part of the fluidized bed combustor seemed to be responsible for the reduction of gaseous chlorine and, consequently, limited mercury emissions reduction during cofiring. 36 refs., 3 figs. 1 tab.

Yan Cao; Hongcang Zhou; Junjie Fan; Houyin Zhao; Tuo Zhou; Pauline Hack; Chia-Chun Chan; Jian-Chang Liou; Wei-ping Pan [Western Kentucky University (WKU), Bowling Green, KY (USA). Institute for Combustion Science and Environmental Technology (ICSET)

2008-12-15T23:59:59.000Z

358

In-bed tube bank for a fluidized-bed combustor  

DOE Patents [OSTI]

An in-bed tube bank (10) for a fluidized bed combustor. The tube bank (10) of the present invention comprises one or more fluid communicating boiler tubes (30) which define a plurality of selectively spaced boiler tube sections (32). The tube sections (32) are substantially parallel to one another and aligned in a common plane. The tube bank (10) further comprises support members (34) for joining adjacent tube sections (32), the support members (34) engaging and extending along a selected length of the tube sections (32) and spanning the preselected space therebetween.

Hemenway, Jr., Lloyd F. (Morgantown, WV)

1990-01-01T23:59:59.000Z

359

Refractory experience in circulating fluidized bed combustors, Task 7. Final report  

SciTech Connect (OSTI)

This report describes the results of an investigation into the status of the design and selection of refractory materials for coal-fueled circulating fluidized-bed combustors. The survey concentrated on operating units in the United States manufactured by six different boiler vendors: Babcock and Wilcox, Combustion Engineering, Foster Wheeler, Keeler Dorr-Oliver, Pyropower, and Riley Stoker. Information was obtained from the boiler vendors, refractory suppliers and installers, and the owners/operators of over forty units. This work is in support of DOE`s Clean Coal Technology program, which includes circulating fluidized-bed technology as one of the selected concepts being evaluated.

Vincent, R.Q.

1989-11-01T23:59:59.000Z

360

Turbine combustor configured for high-frequency dynamics mitigation and related method  

DOE Patents [OSTI]

A turbomachine combustor includes a combustion chamber; a plurality of micro-mixer nozzles mounted to an end cover of the combustion chamber, each including a fuel supply pipe affixed to a nozzle body located within the combustion chamber, wherein fuel from the supply pipe mixes with air in the nozzle body prior to discharge into the combustion chamber; and wherein at least some of the nozzle bodies of the plurality of micro-mixer nozzles have axial length dimensions that differ from axial length dimensions of other of the nozzle bodies.

Uhm, Jong Ho; Zuo, Baifang; York, William David; Srinivasan, Shivakumar

2014-11-04T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Simulation and modeling of atmospheric fluidized bed combustors for high sulfur coals  

SciTech Connect (OSTI)

The principal issues in modeling atmospheric fluidized bed combustors (AFBC) are described using the Oak Ridge National Laboratory (ORNL) - Tennessee Valley Authority (TVA) steady state AFBC model as an example. Comparisons are made between model predictions of boiler performance with experimental data from the TVA 20 MW(e) AFBC pilot plant data. Recent FBC models are briefly reviewed and compared with the ORNL-TVA model. The paper also describes the ongoing effort at TVA on transient modeling of AFBC and presents some preliminary results from the TVA AFBC transient model.

Krishnan, R.P.; Daw, C.S.; Byrd, J.; Zielke, R.; Wells, J.W.

1986-01-01T23:59:59.000Z

362

Reducing Plug and Process Loads for a Large Scale, Low Energy...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

use breakdown (kBtuft 2 yr) As shown in Figure 3a, the PPL energy use intensity (EUI) in the RSF was reduced from the baseline 35.1 kBtuft 2 yr (110.6 kWhm 2 yr) to...

363

High Performance Catalytic Heat Exchanger for SOFC Systems - FuelCell Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Catalytic Heat Catalytic Heat Exchanger for SOFC Systems-FuelCell Energy Background In a typical solid oxide fuel cell (SOFC) power generation system, hot (~900 °C) effluent gas from a catalytic combustor serves as the heat source within a high-temperature heat exchanger, preheating incoming fresh air for the SOFC's cathode. The catalytic combustor and the cathode air heat exchanger together represent the largest opportunity for cost

364

Heat exchanger materials for fluidized bed coal combustors  

SciTech Connect (OSTI)

The 4500-h test in the FluiDyne AFBC tells us three things: (1) ferritic and austenitic superheater alloys perform well to approximately 590/sup 0/C (1100/sup 0/F), (2) high-temperature alloys can perform well at approximately 870/sup 0/C (1600/sup 0/F), and (3) they also may fail miserably at approximately 870/sup 0/C (1600/sup 0/F). Additional studies are clearly needed to develop a fundamental understanding of corrosion mechanisms in AFBC and to determine the envelope of safe operating conditions, which will depend upon alloy sensitivity, the oxygen and sulfur activities, and the many parameters that affect mixing and homogeneity within an operating AFBC. Ultimately long-term tests for periods to 20,000 h will be needed to assure the operability of in-bed heat exchanger and structural materials for the anticipated lifetime of a plant. Good design and well-controlled operations will yield good material performance in AFBC. The key to reliable material usage is operation within the safe envelope. Results from the present experiment suggest that this envelope is large for utility steam systems but smaller for high-temperature tubes and uncooled components in AFBC.

Godfrey, T G; Copper, R H; DeVan, J H; Drake, K R

1980-01-01T23:59:59.000Z

365

Nesting large-eddy simulations within mesoscale simulations for wind energy applications  

SciTech Connect (OSTI)

With increasing demand for more accurate atmospheric simulations for wind turbine micrositing, for operational wind power forecasting, and for more reliable turbine design, simulations of atmospheric flow with resolution of tens of meters or higher are required. These time-dependent large-eddy simulations (LES), which resolve individual atmospheric eddies on length scales smaller than turbine blades and account for complex terrain, are possible with a range of commercial and open-source software, including the Weather Research and Forecasting (WRF) model. In addition to 'local' sources of turbulence within an LES domain, changing weather conditions outside the domain can also affect flow, suggesting that a mesoscale model provide boundary conditions to the large-eddy simulations. Nesting a large-eddy simulation within a mesoscale model requires nuanced representations of turbulence. Our group has improved the Weather and Research Forecasting model's (WRF) LES capability by implementing the Nonlinear Backscatter and Anisotropy (NBA) subfilter stress model following Kosovic (1997) and an explicit filtering and reconstruction technique to compute the Resolvable Subfilter-Scale (RSFS) stresses (following Chow et al, 2005). We have also implemented an immersed boundary method (IBM) in WRF to accommodate complex terrain. These new models improve WRF's LES capabilities over complex terrain and in stable atmospheric conditions. We demonstrate approaches to nesting LES within a mesoscale simulation for farms of wind turbines in hilly regions. Results are sensitive to the nesting method, indicating that care must be taken to provide appropriate boundary conditions, and to allow adequate spin-up of turbulence in the LES domain.

Lundquist, J K; Mirocha, J D; Chow, F K; Kosovic, B; Lundquist, K A

2008-09-08T23:59:59.000Z

366

Sound speed of scalar field dark energy: weak effects and large uncertainties  

E-Print Network [OSTI]

The possibility of reconstruction of Lagrangian for the scalar field dark energy with constant effective sound speed $c_s$ is analyzed. The value of $c_s$ is estimated together with other dark energy parameters ($\\Omega_{de}$, $w_0$, $c_a^2$) and rest of cosmological parameters on the basis of data including Planck-2013 results on CMB anisotropy, BAO distance ratios from recent galaxy surveys, magnitude-redshift relations for distant SNe Ia from SNLS3 and Union2.1 compilations and the HST determination of the Hubble constant. For main dark energy and cosmological parameters the following best-fit values and 2$\\sigma$ confidence limits are obtained: $\\Omega_{de}=0.723^{+0.018}_{-0.025}$, $w_0=-1.176^{+0.141}_{-0.128}$, $c_a^2=-1.509^{+0.370}_{-0.102}$, $\\Omega_bh^2=0.0221\\pm0.0005$, $\\Omega_{cdm}h^2=0.119^{+0.005}_{-0.003}$, $h=0.715^{+0.026}_{-0.028}$, $n_s=0.962^{+0.010}_{-0.014}$, $A_s=(2.209^{+0.102}_{-0.112})\\cdot10^{-9}$, $\\tau_{rei}=0.093^{+0.022}_{-0.029}$. It is shown that no value of $c_s$ from the r...

Sergijenko, Olga

2014-01-01T23:59:59.000Z

367

High Energy Large Area Surveys: optically obscured AGN and the history of accretion  

E-Print Network [OSTI]

Hard X-ray, large area surveys are a fundamental complement of ultra-deep, pencil beam surveys in obtaining a more complete coverage of the L-z plane, allowing to find luminous QSO in wide z ranges. Furthermore, results from these surveys can be used to make reliable predictions about the luminosity (and hence the redshift) of the sources in the deep surveys which have optical counterparts too faint to be observed with the present generation of optical telescopes. This allows us to obtain accurate luminosity functions on wide luminosity and redshift intervals.

F. Fiore; the HELLAS2XMM collaboration

2004-06-01T23:59:59.000Z

368

The optical depth of the Universe to ultrahigh energy cosmic ray scattering in the magnetized large scale structure  

E-Print Network [OSTI]

This paper provides an analytical description of the transport of ultrahigh energy cosmic rays in an inhomogeneously magnetized intergalactic medium. This latter is modeled as a collection of magnetized scattering centers such as radio cocoons, magnetized galactic winds, clusters or magnetized filaments of large scale structure, with negligible magnetic fields in between. Magnetic deflection is no longer a continuous process, it is rather dominated by scattering events. We study the interaction between high energy cosmic rays and the scattering agents. We then compute the optical depth of the Universe to cosmic ray scattering and discuss the phenomological consequences for various source scenarios. For typical parameters of the scattering centers, the optical depth is greater than unity at 5x10^{19}eV, but the total angular deflection is smaller than unity. One important consequence of this scenario is the possibility that the last scattering center encountered by a cosmic ray be mistaken with the source of this cosmic ray. In particular, we suggest that part of the correlation recently reported by the Pierre Auger Observatory may be affected by such delusion: this experiment may be observing in part the last scattering surface of ultrahigh energy cosmic rays rather than their source population. Since the optical depth falls rapidly with increasing energy, one should probe the arrival directions of the highest energy events beyond 10^{20}eV on an event by event basis to circumvent this effect.

Kumiko Kotera; Martin Lemoine

2008-04-30T23:59:59.000Z

369

Coordinated control for large-scale EV charging facilities and energy storage devices participating in frequency regulation  

Science Journals Connector (OSTI)

Abstract With the increasing penetration of renewable energy, automatic generation control (AGC) capacity requirements will increase dramatically, becoming a challenging task that must be addressed. The rapid growth of electric vehicles (EVs) provides new approaches for the stable operation of power systems. Vehicle-to-grid (V2G) technology has the potential to provide frequency regulation (FR) services. Fully taking into account the advantages of \\{EVs\\} and battery energy storage stations (BESSs), i.e. rapid response and large instantaneous power, this paper presents a coordinated control strategy for large-scale EVs, \\{BESSs\\} and traditional FR resources involved in AGC. Response priorities and control strategies for the FR resources vary with different operating states. To verify the effectiveness of the proposed control strategy, dynamic simulations for EV/BESS to participate in AGC of a two-area interconnected power system are performed in the Matlab/Simulink program. The simulation results show that the proposed method can not only fully utilize the advantages of EV/BESS, but also achieve the coordination among different FR resources, thus improving the frequency stability and facilitating the integration of renewable energy.

Jin Zhong; Lina He; Canbing Li; Yijia Cao; Jianhui Wang; Baling Fang; Long Zeng; Guoxuan Xiao

2014-01-01T23:59:59.000Z

370

On the Use of Integrated Daylighting and Energy Simulations To Drive the Design of a Large Net-Zero Energy Office Building: Preprint  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

522 522 August 2010 On the Use of Integrated Daylighting and Energy Simulations To Drive the Design of a Large Net-Zero Energy Office Building Preprint Rob Guglielmetti, Shanti Pless, and Paul Torcellini Presented at SimBuild 2010 New York, New York August 15-19, 2010 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

371

An energy?based updated modal approach for the efficient analysis of large trimmed models  

Science Journals Connector (OSTI)

Large trimmed models widely encountered in the automotive industry generally involve a body?in?white structure coupled to an acoustic cavity and covered by a set of trim components. Due to the large number of degrees of freedom of such models the direct analysis in physical coordinates though theoretically correct is not feasible on current computers. The paper presents an alternative and efficient solution strategy in modal coordinates that relies on an update of the modal parameters of the car body and the acoustic cavity based on the energetic behaviour of the trim components. The description of the trim component in terms of an energetic database simplifies the data exchange between the automotive manufactor and the trim provider. Furthermore it enables a fast frequency analysis of various loadcases/trim scenarios and makes optimisation possible. The updated modal approach implemented in Actran/Trim is applied on a simplified car model on which various trim components are applied. The application shows how the stiffening added mass and damping effects of each trim component can be derived from the energetic database and can guide an optimisation process.

Gregory Lielens; Benoit Van Den Nieuwenhof; Fabien Acher; Jean?Pierre Coyette

2008-01-01T23:59:59.000Z

372

Meet with Large Businesses  

Broader source: Energy.gov (indexed) [DOE]

Meet with Large Businesses Meet with Large Businesses and learn about upcoming acquisitions! * Federal Energy Management Program (FEMP) * National Renewable Energy Laboratory (NREL) * Small Business Administration (SBA) * U.S. Department of Energy / Energy, Efficiency, and Renewable Energy (EERE) * U.S. Department of Energy / Golden Field Office (GFO) * Western Area Power Administration (WAPA) * Colorado Procurement Technical Assistance Center (PTAC)

373

Fluidized Bed Technology - An R&D Success Story | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

An R&D Success Story An R&D Success Story Fluidized Bed Technology - An R&D Success Story In the early 1990s, POWER magazine called the development of fluidized bed coal combustors "the commercial success story of the last decade in the power generation business." The success, perhaps the most significant advance in coal-fired boiler technology in a half century, was achieved largely through the technology program of the U.S. Department of Energy's Office of Fossil Energy (and its predecessors). The Interior Department's Office of Coal Research, one of the forerunners of the Energy Department, began studying the fluidized bed combustion concept in the early 1960s. The original goal was to develop a compact "package" coal boiler that could be pre-assembled at the factory and shipped to a plant site (a lower cost

374

2014-09-18 Issuance: Energy Conservation Standard for Small, Large, and Very Large Air-Cooled Commercial Package Air Conditioning and Heating Equipment; Notice of Proposed Rulemaking and Public Meeting  

Broader source: Energy.gov [DOE]

This document is a pre-publication Federal Register Notice of Proposed Rulemaking and Public Meeting regarding Energy Conservation Standards for Small, large, and Very Large Air-Cooled Commercial Package Air Conditioning and Heating Equipment, as issued by the Assistant Secretary for Energy Efficiency and Renewable Energy on September 18, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

375

Method for control of NOx emission from combustors using fuel dilution  

DOE Patents [OSTI]

A method of controlling NOx emission from combustors. The method involves the controlled addition of a diluent such as nitrogen or water vapor, to a base fuel to reduce the flame temperature, thereby reducing NOx production. At the same time, a gas capable of enhancing flame stability and improving low temperature combustion characteristics, such as hydrogen, is added to the fuel mixture. The base fuel can be natural gas for use in industrial and power generation gas turbines and other burners. However, the method described herein is equally applicable to other common fuels such as coal gas, biomass-derived fuels and other common hydrocarbon fuels. The unique combustion characteristics associated with the use of hydrogen, particularly faster flame speed, higher reaction rates, and increased resistance to fluid-mechanical strain, alter the burner combustion characteristics sufficiently to allow operation at the desired lower temperature conditions resulting from diluent addition, without the onset of unstable combustion that can arise at lower combustor operating temperatures.

Schefer, Robert W. (Alamo, CA); Keller, Jay O (Oakland, CA)

2007-01-16T23:59:59.000Z

376

Development of gas turbine combustor fed with bio-fuel oil  

SciTech Connect (OSTI)

Considering the increasing interest in the utilization of biofuels derived from biomass pyrolysis, ENEL/CRT carried out some experimental investigations on feasibility of biofuels utilization in the electricity production systems. The paper considers the experimental activity for the development and the design optimization of a gas turbine combustor suitable to be fed with biofuel oil, on the basis of the pressurized combustion performance obtained in a small gas turbine combustor fed with bio-fuel oil and ethanol/bio-fuel oil mixtures. Combustion tests were performed using the combustion chamber of a 40 kWe gas turbine. A small pressurized rig has been constructed including a nozzle for pressurization and a heat recovering combustion air preheating system, together with a proper injection system consisting of two dual fuel atomizers. Compressed air allowed a good spray quality and a satisfactory flame instability, without the need of a pilot frame, also when firing crude bio-fuel only. A parametric investigation on the combustion performance has been performed in order to evaluate the effect of fuel properties, operating conditions and injection system geometry, especially as regards CO and NO{sub x} emissions and smoke index.

Ardy, P.L.; Barbucci, P.; Benelli, G. [ENEL SpA R& D Dept., Pisa (Italy)] [and others

1995-11-01T23:59:59.000Z

377

Corrosion evaluation of weldments exposed in TVA and Rocketdyne AFB (Atmospheric Fluid-Bed) Combustors  

SciTech Connect (OSTI)

A number of experimental iron-, nickel-, and cobalt-based weldment materials were exposed in TVA 20MW and Rocketdyne Atmospheric Fluid-bed Combustors at 849{degree}C for 1261 h and 871{degree}C for 1000 h, respectively. The post-exposure analyses were conducted in Argonne National Laboratory. All specimens experienced different degrees of internal oxidation/sulfidation. Among eight filler materials, Marathon 25/35R and Haynes 188 showed the least corrosion attack, which was less than 0.5 mmpy. The high nickel content in the weldment turned out to be unfavorable for the corrosion resistance in AFBC environment. The differences in the coal/bed chemistry induced different corrosion behavior in materials exposed in TVA and Rocketdyne systems. Calcium sulfate deposit on the specimens showed significant effects on the internal oxidation/sulfidation of the alloys. The results of this study would supplement the material database, in particular weldment performance, and aid in materials selection for atmospheric fluidized bed combustor applications. 10 refs., 13 figs., 4 tabs.

Wang, D.Y.; Natesan, K.

1989-09-01T23:59:59.000Z

378

High-pressure reaction and emissions characteristics of catalytic reactors for gas turbine combustors  

Science Journals Connector (OSTI)

The reaction and emissions characteristics of catalytic reactors comprising noble metal catalysts were investigated using homogeneous mixtures of natural gas and vitiated air at pressures up to 2.9 MPa. The mixture temperatures at inlet ranged from 500 to 700°C and the fuel-air ratio was increased till the exit gas temperature reached about 1200°C. Values of combustion efficiency greater than 99.5% and nitrogen oxides emissions for all catalytic reactors tested were less than 0.2 g NO2/kg fuel (2 ppm (15% 02) ) for all reactors at reactor exit gas temperatures higher than about 1100°C. Combustion efficiency decreased with increasing pressure in the heterogeneous-reaction controlled region, though a pressure increase favored homogeneous, gas phase reactions. Appreciable reactivity deterioration by aging for 1000 h at 1000°C was observed at lower mixture temperatures. A two-stage combustor comprising a conventional flame combustion stage and a catalytic stage was fabricated and its NO,x emissions and performance were evaluated at conditions typical of stationary gas turbine combustor operations. About 80% reduction in NO,x emissions levels compared with flame combustion was attained at 1 \\{MPa\\} pressure and 1180°C exit gas temperature, together with complete hydrocarbon combustion.

S. Hayashi; H. Yamada; K. Shimodaira

1995-01-01T23:59:59.000Z

379

Pressure–heat release measurements during start-up conditions in a pulse combustor  

Science Journals Connector (OSTI)

An experimental study focusing on the temporal evolution of the global OH heat release (q?) and dynamic pressure (p?) from ignition to limit cycle conditions in an aerovalved pulse combustor has been carried out. The motivation of the work was to investigate how the thermo-acoustic relationships evolve, as very little is understood regarding how pressure and heat release couplings develop prior to establishing limit cycle conditions. The start-up experiments demonstrated that the total start-up sequences occurred within 100 ms and can be subdivided into three regimes: (i) ignition and decay; (ii) instability growth; and (iii) onset of limit cycle operation. The main results showed that upon ignition the high amplitude impulse pressure wave corresponded to the natural frequency of the pulse combustor at ambient gas temperature and was verified by an acoustic model. The pressure field over the growth period exhibited two main trends, either steady amplitude growth or a short delay interval followed by steady amplitude growth to limit cycle conditions. Overall, no reproducibility in frequency or phase during the growth period was observed pointing to the influence of strong non-linear interactions. When operating under limit cycle conditions, the heat release and pressure oscillations were in phase, possessed high levels of coherence, and exhibited narrow band frequency response at the operating frequency and several harmonics.

J.R. Dawson; V.M. Rodriguez-Martinez; A.J. Beale; T. O’Doherty

2005-01-01T23:59:59.000Z

380

File:Large Construction Site Notice for Primary Operators.pdf | Open Energy  

Open Energy Info (EERE)

Primary Operators.pdf Primary Operators.pdf Jump to: navigation, search File File history File usage Metadata File:Large Construction Site Notice for Primary Operators.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Full resolution ‎(1,275 × 1,650 pixels, file size: 866 KB, MIME type: application/pdf) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 17:00, 10 April 2013 Thumbnail for version as of 17:00, 10 April 2013 1,275 × 1,650 (866 KB) Alevine (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage There are no pages that link to this file. Metadata This file contains additional information, probably added from the digital

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381

Using the topology of large-scale structure in the WiggleZ Dark Energy Survey as a cosmological standard ruler  

Science Journals Connector (OSTI)

......large-scale structure in the WiggleZ Dark Energy Survey as a cosmological standard ruler...field traced by the WiggleZ Dark Energy Survey. The Minkowski functionals...using data from the WiggleZ Dark Energy Survey (Drinkwater et-al. 2010......

Chris Blake; J. Berian James; Gregory B. Poole

2014-01-01T23:59:59.000Z

382

1100 IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 23, NO. 5, MAY 2005 Energy Efficiency of Large-Scale Wireless Networks  

E-Print Network [OSTI]

1100 IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 23, NO. 5, MAY 2005 Energy Efficiency of large-scale wireless networks is presented. The radio model includes energy consumption of nodes at var- ious operating states. We analyze the total energy consumption of the proactive and the reactive

Zhao, Qing

383

Paper BL3.199 EWEC 2007 Wind Energy Conference and Exhibition BL3.199 Wake Modelling for intermediate and large wind farms  

E-Print Network [OSTI]

Paper BL3.199 EWEC 2007 Wind Energy Conference and Exhibition 1 BL3.199 Wake Modelling for intermediate and large wind farms Ole Rathmann1, 3 , Sten Frandsen1 , and Rebecca Barthelmie2, 1 1 Wind Energy to after the rotor) AT . #12;Paper BL3.199 EWEC 2007 Wind Energy Conference and Exhibition 2 Figure 1

384

Time-and Energy-efficient Detection of Unknown Tags in Large-scale RFID Systems Xiulong Liu, Heng Qi, Keqiu Li  

E-Print Network [OSTI]

Time- and Energy-efficient Detection of Unknown Tags in Large-scale RFID Systems Xiulong Liu, Heng by reducing more than 90% of the required execution time and energy consumption. I. INTRODUCTION Radio, this is the first piece of work taking both time-efficiency and energy-efficiency into consideration, where

Liu, Alex X.

385

Toroidal Alfven Eigenmodes in a Tokamak with a Population of High-Energy Large-Orbit Ions  

SciTech Connect (OSTI)

The effect of the density gradient of high-energy ions moving in large magnetic drift orbits is studied analytically in the context of the problem of toroidal Alfven eigenmodes (TAEs) in a tokamak. It is found that, when the population of such ions is not too small, this effect can substantially modify standard TAEs and give rise to new types of TAEs, which are called TAEs-H, TAEs-H{sup +}s, and TAEs-H{sup -}s. The continual dissipation of TAEs is investigated with allowance for the effect in question. It is shown that the dissipation acts to dampen all the TAE types under consideration.

Mikhailovskii, A.B.; Kovalishen, E.A. [Nuclear Fusion Institute, Russian Research Centre Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182 (Russian Federation); Moscow Institute of Physics and Technology, Institutskii pr. 9, Dolgoprudnyi, Moscow oblast, 141700 (Russian Federation); Shirokov, M.S. [Nuclear Fusion Institute, Russian Research Centre Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182 (Russian Federation); Moscow Engineering Physics Institute (State University), Kashirskoe sh. 31, Moscow, 115409 (Russian Federation); Konovalov, S.V. [Nuclear Fusion Institute, Russian Research Centre Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182 (Russian Federation); Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, Ibaraki 3111-0193 (Japan)

2005-02-15T23:59:59.000Z

386

Ion Heating and High-Energy-Particle Production by Ion-Cyclotron Heating in the Large Helical Device  

Science Journals Connector (OSTI)

Ion-cyclotron heating was applied to the Large Helical Device. When the proton-cyclotron resonance was near the saddle point of the magnetic field-strength plane, strong ion-cyclotron damping occurred. Under these conditions efficient plasma heating was achieved for more than one minute. A high-energy ion tail was observed, and the effective tail temperature was determined by a balance between the wave acceleration and the electron-drag relaxation. There was no apparent sign of particle orbit loss effect in the investigated density range of 0.8–1.3×1019 m-3.

T. Mutoh et al.

2000-11-20T23:59:59.000Z

387

Optimized Energy Management for Large Organizations Utilizing an On-Site PHEV fleet, Storage Devices and Renewable Electricity Generation  

SciTech Connect (OSTI)

Abstract This paper focuses on the daily electricity management problem for organizations with a large number of employees working within a relatively small geographic location. The organization manages its electric grid including limited on-site energy generation facilities, energy storage facilities, and plug-in hybrid electric vehicle (PHEV) charging stations installed in the parking lots. A mixed integer linear program (MILP) is modeled and implemented to assist the organization in determining the temporal allocation of available resources that will minimize energy costs. We consider two cost compensation strategies for PHEV owners: (1) cost equivalent battery replacement reimbursement for utilizing vehicle to grid (V2G) services from PHEVs; (2) gasoline equivalent cost for undercharging of PHEV batteries. Our case study, based on the Oak Ridge National Laboratory (ORNL) campus, produced encouraging results and substantiates the importance of controlled PHEV fleet charging as opposed to uncontrolled charging methods. We further established the importance of realizing V2G capabilities provided by PHEVs in terms of significantly reducing energy costs for the organization.

Dashora, Yogesh [University of Texas, Austin; Barnes, J. Wesley [University of Texas, Austin; Pillai, Rekha S [ORNL; Combs, Todd E [ORNL; Hilliard, Michael R [ORNL

2012-01-01T23:59:59.000Z

388

Compatibility between high energy particle confinement and magnetohydrodynamic stability in the inward-shifted plasmas of the Large Helical Device  

Science Journals Connector (OSTI)

The experimentally optimized magnetic field configuration of the Large Helical Device [A. Iiyoshi et al. Nucl. Fusion39 1245 (1999)] where the magnetic axis is shifted inward by 15 cm from the early theoretical prediction reveals 50% better global energy confinement than the prediction of the scaling law. This configuration has been investigated further from the viewpoints of high energy particle confinement and magnetohydrodynamic(MHD) stability. The confinement of high energy ions is improved as expected. The minority heating of ion cyclotron range of frequency was successful and the heating efficiency was improved by the inward shift. The confinement of passing particles by neutral beam injection was also improved under low magnetic field strength and there could be obtained an almost steady high beta discharge up to 3% in volume average. This was a surprising result because the observed pressure gradient exceeded the Mercier unstable limit. The observed MHD activities became as high as beta but they did not grow enough to deteriorate the confinement of high energy ions or the performance of the bulk plasma which was still 50% better than the scaling. According to these favorable results better performance would be expected by increasing the heating power because the neoclassical transport can also be improved there.

O. Kaneko; A. Komori; H. Yamada; N. Ohyabu; K. Kawahata; Y. Nakamura; K. Ida; S. Murakami; T. Mutoh; S. Sakakibara; S. Masuzaki; N. Ashikawa; M. Emoto; H. Funaba; M. Goto; H. Idei; K. Ikeda; N. Inoue; M. Isobe; K. Khlopenkov; S. Kubo; R. Kumazawa; T. Minami; J. Miyazawa; T. Morisaki; S. Morita; S. Muto; Y. Nagayama; N. Nakajima; H. Nakanishi; K. Narihara; K. Nishimura; N. Noda; T. Notake; T. Kobuchi; Y. Liang; S. Ohdachi; Y. Oka; M. Osakabe; T. Ozaki; B. J. Peterson; A. Sagara; K. Saito; R. Sakamoto; M. Sasao; M. Sato; T. Seki; T. Shimozuma; M. Shoji; H. Suzuki; Y. Takeiri; N. Tamura; K. Tanaka; K. Toi; T. Tokuzawa; Y. Torii; K. Tsumori; I. Yamada; S. Yamamoto; M. Yokoyama; Y. Yoshimura; M. Yoshinuma; K. Y. Watanabe; T. Watari; Y. Xu; K. Itoh; K. Matsuoka; K. Ohkubo; I. Ohtake; T. Satow; S. Sudo; K. Yamazaki; Y. Hamada; O. Motojima; M. Fujiwara

2002-01-01T23:59:59.000Z

389

Effect of syngas composition and CO2-diluted oxygen on performance of a premixed swirl-stabilized combustor.  

SciTech Connect (OSTI)

Future energy systems based on gasification of coal or biomass for co-production of electrical power and fuels may require gas turbine operation on unusual gaseous fuel mixtures. In addition, global climate change concerns may dictate the generation of a CO{sub 2} product stream for end-use or sequestration, with potential impacts on the oxidizer used in the gas turbine. In this study the operation at atmospheric pressure of a small, optically accessible swirl-stabilized premixed combustor, burning fuels ranging from pure methane to conventional and H{sub 2}-rich and H{sub 2}-lean syngas mixtures is investigated. Both air and CO{sub 2}-diluted oxygen are used as oxidizers. CO and NO{sub x} emissions for these flames have been determined from the lean blowout limit to slightly rich conditions ({phi} - 1.03). In practice, CO{sub 2}-diluted oxygen systems will likely be operated close to stoichiometric conditions to minimize oxygen consumption while achieving acceptable NO{sub x} performance. The presence of hydrogen in the syngas fuel mixtures results in more compact, higher temperature flames, resulting in increased flame stability and higher NO{sub x} emissions. Consistent with previous experience, the stoichiometry of lean blowout decreases with increasing H{sub 2} content in the syngas. Similarly, the lean stoichiometry at which CO emissions become significant decreases with increasing H{sub 2} content. For the mixtures investigated, CO emissions near the stoichiometric point do not become significant until {phi} > 0.95. At this stoichiometric limit, CO emissions rise more rapidly for combustion in O{sub 2}-CO{sub 2} mixtures than for combustion in air.

Williams, Timothy C.; Shaddix, Christopher R.; Schefer, Robert W.

2007-01-01T23:59:59.000Z

390

Numerical Modeling of Non-adiabatic Heat-Recirculating Combustors C. H. Kuo and P. D. Ronney  

E-Print Network [OSTI]

of temperature-dependent gas and solid properties, viscous flow, surface-to-surface radiative heat transfer, heat affect the performance of heat-recirculating combustors, but the relative importance of such effects, however, heat and friction losses become more significant, thus fuel-to-electricity conversion devices

391

Dynamic Tests and Results in an Oxy-fuel Circulating Fluidized Bed Combustor with Warm Flue Gas Recycle  

Science Journals Connector (OSTI)

Dynamic Tests and Results in an Oxy-fuel Circulating Fluidized Bed Combustor with Warm Flue Gas Recycle ... Dynamic step change tests concerning the coal feed rate and coal type were conducted. ... In the dynamic tests, the oxygen concentration in the flue gas fluctuates in the form of a sinusoidal wave because of the fast volatile combustion and the delay in the char ignition. ...

Jian-xin Zhou; Zhuang Shao; Feng-qi Si; Zhi-gao Xu

2014-11-17T23:59:59.000Z

392

Large and small-scale structures and the dust energy balance problem in spiral galaxies  

E-Print Network [OSTI]

The interstellar dust content in galaxies can be traced in extinction at optical wavelengths, or in emission in the far-infrared. Several studies have found that radiative transfer models that successfully explain the optical extinction in edge-on spiral galaxies generally underestimate the observed FIR/submm fluxes by a factor of about three. In order to investigate this so-called dust energy balance problem, we use two Milky Way-like galaxies produced by high-resolution hydrodynamical simulations. We create mock optical edge-on views of these simulated galaxies (using the radiative transfer code SKIRT), and we then fit the parameters of a basic spiral galaxy model to these images (using the fitting code FitSKIRT). The basic model includes smooth axisymmetric distributions along a S\\'ersic bulge and exponential disc for the stars, and a second exponential disc for the dust. We find that the dust mass recovered by the fitted models is about three times smaller than the known dust mass of the hydrodynamical in...

Saftly, W; De Geyter, G; Camps, P; Renaud, F; Guedes, J; De Looze, I

2015-01-01T23:59:59.000Z

393

Large-eddy simulation/probability density function modeling of a non-premixed CO/H2  

E-Print Network [OSTI]

;applicable to practical devices such as gas turbine combustors and internal combustion engines [2­ 4]. In LES September 2012 Abstract We report a large-eddy simulation (LES)/probability density function (PDF) study/PDF modeling approach, recent progress of LES of tur- bulent combustion is reviewed in [10]. In the modeling

394

Measurement of energy flow at large pseudorapidities in pp collisions at sqrt(s) = 0.9 and 7 TeV  

E-Print Network [OSTI]

The energy flow, dE/d(eta), is studied at large pseudorapidities in proton-proton collisions at the LHC, for centre-of-mass energies of 0.9 and 7 TeV. The measurements are made in the pseudorapidity range 3.15 energy-flow measurements. Inclusion of multiple-parton interactions in the Monte Carlo event generators is found to improve the description of the energy-flow measurements.

CMS Collaboration

2011-10-02T23:59:59.000Z

395

Method of and apparatus for preheating pressurized fluidized bed combustor and clean-up subsystem of a gas turbine power plant  

DOE Patents [OSTI]

In a gas turbine power plant having a pressurized fluidized bed combustor, gas turbine-air compressor subsystem and a gas clean-up subsystem interconnected for fluid flow therethrough, a pipe communicating the outlet of the compressor of the gas turbine-air compressor subsystem with the interior of the pressurized fluidized bed combustor and the gas clean-up subsystem to provide for flow of compressed air, heated by the heat of compression, therethrough. The pressurized fluidized bed combustor and gas clean-up subsystem are vented to atmosphere so that the heated compressed air flows therethrough and loses heat to the interior of those components before passing to the atmosphere.

Cole, Rossa W. (E. Rutherford, NJ); Zoll, August H. (Cedar Grove, NJ)

1982-01-01T23:59:59.000Z

396

Impact of high energy high intensity proton beams on targets: Case studies for Super Proton Synchrotron and Large Hadron Collider  

Science Journals Connector (OSTI)

The Large Hadron Collider (LHC) is designed to collide two proton beams with unprecedented particle energy of 7 TeV. Each beam comprises 2808 bunches and the separation between two neighboring bunches is 25 ns. The energy stored in each beam is 362 MJ, sufficient to melt 500 kg copper. Safety of operation is very important when working with such powerful beams. An accidental release of even a very small fraction of the beam energy can result in severe damage to the equipment. The machine protection system is essential to handle all types of possible accidental hazards; however, it is important to know about possible consequences of failures. One of the critical failure scenarios is when the entire beam is lost at a single point. In this paper we present detailed numerical simulations of the full impact of one LHC beam on a cylindrical solid carbon target. First, the energy deposition by the protons is calculated with the FLUKA code and this energy deposition is used in the BIG2 code to study the corresponding thermodynamic and the hydrodynamic response of the target that leads to a reduction in the density. The modified density distribution is used in FLUKA to calculate new energy loss distribution and the two codes are thus run iteratively. A suitable iteration step is considered to be the time interval during which the target density along the axis decreases by 15%–20%. Our simulations suggest that the full LHC proton beam penetrates up to 25 m in solid carbon whereas the range of the shower from a single proton in solid carbon is just about 3 m (hydrodynamic tunneling effect). It is planned to perform experiments at the experimental facility HiRadMat (High Radiation Materials) at CERN using the proton beam from the Super Proton Synchrotron (SPS), to compare experimental results with the theoretical predictions. Therefore simulations of the response of a solid copper cylindrical target hit by the SPS beam were performed. The particle energy in the SPS beam is 440 GeV while it has the same bunch structure as the LHC beam, except that it has only up to 288 bunches. Beam focal spot sizes of ?=0.1, 0.2, and 0.5 mm have been considered. The phenomenon of significant hydrodynamic tunneling due to the hydrodynamic effects is also expected for the experiments.

N. A. Tahir, J. Blanco Sancho, A. Shutov, R. Schmidt, and A. R. Piriz

2012-05-08T23:59:59.000Z

397

2014-11-25 Issuance: Energy Conservation Standards for Small, Large, and Very Large Air-cooled Commercial Package Air Conditioning and Heating Equipment; Extension of Public Comment Period  

Broader source: Energy.gov [DOE]

This document is a pre-publication Federal Register extension of the public comment period regarding energy conservation standards for small, large and very large air-cool commercial package air conditioning and heating equipment, as issued by the Deputy Assistant Secretary for Energy Efficiency on November 25, 2014. Though it is not intended or expected, should any discrepancy occur between the document posted here and the document published in the Federal Register, the Federal Register publication controls. This document is being made available through the Internet solely as a means to facilitate the public's access to this document.

398

Process for generating electricity in a pressurized fluidized-bed combustor system  

DOE Patents [OSTI]

A process and apparatus for generating electricity using a gas turbine as part of a pressurized fluidized-bed combustor system wherein coal is fed as a fuel in a slurry in which other constituents, including a sulfur sorbent such as limestone, are added. The coal is combusted with air in a pressurized combustion chamber wherein most of the residual sulfur in the coal is captured by the sulfur sorbent. After particulates are removed from the flue gas, the gas expands in a turbine, thereby generating electric power. The spent flue gas is cooled by heat exchange with system combustion air and/or system liquid streams, and the condensate is returned to the feed slurry.

Kasper, Stanley (Pittsburgh, PA)

1991-01-01T23:59:59.000Z

399

Energy biomass from large rangeland shrubs of the intermountain United States. [Sagebrush, Saltbush, Greasewood, Rubber Rabbitbrush, Spreading Rabbitbush  

SciTech Connect (OSTI)

Large individual plants within a few species of rangeland shrubs were studied in several intermountain states for their potential use in establishing biomass fuel energy plantations. Biomass and other shrub physical characteristics plus site data were recorded for big sagebrush, fourwing saltbush, big saltbush, greasewood, rubber rabbitbrush, and spreading rabbitbrush (C. linifolius) in 34 locations. Samples of current year's growth and woody tissue were analyzed for burning qualities (heat of combustion, S, mositure, and ash content). Greatest biomass/plant of the individuals sampled was found in greasewood with fourwing saltbush, rubber rabbitbrush, and sagebrush following in decreasing order. Burning qualities varied among the species analyzed. The heat of combustion of the woody material from all shrubs was approximately 4500 kcal/kg, but current year's growth varied considerably among species.

van Epps, G.A.; Barker, J.R.; McKell, C.M.

1982-01-01T23:59:59.000Z

400

Large scale solubilization of coal and bioconversion to utilizable energy. Quarterly technical progress report, September--December 1993  

SciTech Connect (OSTI)

In order to develop a system for a large scale coal solubilization and its bioconversion to utilizable fuel, we plan to clone the genes encoding Neurospora protein that facilitate depolymerization of coal. We also plan to use desulfurizing bacteria to remove the sulfur in situ and use other microorganisms to convert biosolubilized coal into utilizable energy following an approach utilizing several microorganisms (Faison, 1991). In addition the product of coal solubilized by fungus will be characterized to determine their chemical nature and the mechanism of reaction catalyzed by fungal product during in vivo and in vitro solubilization by the fungus or purified fungal protein. The main objectives are: (1) Cloning of Neurospora gene for coal depolymerization protein controlling solubilization in different host cells, utilizing Neurospora plasmid and other vector(s); (2) (a) Development of a large scale electrophoretic separation of coal-drived products obtained after microbial solubilization; (b) Identification of the coal derived products obtained after biosolubilization by Neurospora cultures or obtained after Neurospora enzyme catalyzed reaction in in vitro by the wildtype and mutant enzymes; and (3) Bioconversion of coal-derived products into utilizable fuel.

Mishra, N.C.

1993-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Measured energy savings and demand reduction from a reflective roof membrane on a large retail store in Austin  

E-Print Network [OSTI]

the abated annual energy and demand expenditures, simplea/c annual abated energy and demand expenditures and presentof future abated energy and demand expenditures is estimated

Konopacki, Steven J.; Akbari, Hashem

2001-01-01T23:59:59.000Z

402

HIGH-TEMPERATURE ELECTROLYSIS FOR LARGE-SCALE HYDROGEN AND SYNGAS PRODUCTION FROM NUCLEAR ENERGY – SYSTEM SIMULATION AND ECONOMICS  

SciTech Connect (OSTI)

A research and development program is under way at the Idaho National Laboratory (INL) to assess the technological and scale-up issues associated with the implementation of solid-oxide electrolysis cell technology for efficient high-temperature hydrogen production from steam. This work is supported by the US Department of Energy, Office of Nuclear Energy, under the Nuclear Hydrogen Initiative. This paper will provide an overview of large-scale system modeling results and economic analyses that have been completed to date. System analysis results have been obtained using the commercial code UniSim, augmented with a custom high-temperature electrolyzer module. Economic analysis results were based on the DOE H2A analysis methodology. The process flow diagrams for the system simulations include an advanced nuclear reactor as a source of high-temperature process heat, a power cycle and a coupled steam electrolysis loop. Several reactor types and power cycles have been considered, over a range of reactor outlet temperatures. Pure steam electrolysis for hydrogen production as well as coelectrolysis for syngas production from steam/carbon dioxide mixtures have both been considered. In addition, the feasibility of coupling the high-temperature electrolysis process to biomass and coal-based synthetic fuels production has been considered. These simulations demonstrate that the addition of supplementary nuclear hydrogen to synthetic fuels production from any carbon source minimizes emissions of carbon dioxide during the production process.

J. E. O'Brien; M. G. McKellar; E. A. Harvego; C. M. Stoots

2009-05-01T23:59:59.000Z

403

A methdology for baselining the energy use at large campus utility plants for the purpose of measuring energy savings from energy conservation retrofits  

E-Print Network [OSTI]

central plant. The case study for the application of the methodology of this thesis was the Texas A&M University main campus central plant. Useful results were obtained by utilizing one portion of the data to develop an energy usage baseline model...

Beasley, Rodney Craig

2012-06-07T23:59:59.000Z

404

EA-1699: Finding of No Significant Impact | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

9: Finding of No Significant Impact 9: Finding of No Significant Impact EA-1699: Finding of No Significant Impact Pope/Douglas Third Combustor Expansion Project, Alexandria, Minnesota The United States Department of Energy, National Energy Technology Laboratory (DOE NETL) prepared this Environmental Assessment (EA) to analyze the potential environmental impacts of providing funding for the proposed Pope/Douglas Third Combustor Expansion Project in Alexandria, Minnesota. Based on the EA, DOE determined that its proposed action would result in no significant adverse impacts to the human environment Finding of No significant Impact for the Pope/Douglas Third Combustor Expansion Project, Alexandria, Minnesota, DOE/EA-1699 (May 2010) More Documents & Publications EA-1699: Final Environmental Assessment

405

Materials for Advanced Turbine Engines (MATE). Project 3: design, fabrication and evaluation of an oxide dispersion strengthened sheet alloy combustor liner. Final Report  

SciTech Connect (OSTI)

The suitability of wrought oxide dispersion strengthened (ODS) superalloy sheet for gas turbine engine combustor applications was evaluated. Incoloy MA 956 (FeCrAl base) and Haynes Developmental Alloy (HDA) 8077 (NiCrAl base) were evaluated. Preliminary tests showed both alloys to be potentially viable combustor materials, with neither alloy exhibiting a significant advantage over the other. Both alloys demonstrated a +167C (300 F) advantage of creep and oxidation resistance with no improvement in thermal fatigue capability compared to a current generation combustor alloy (Hastelloy X). MA956 alloy was selected for further demonstration because it exhibited better manufacturing reproducibility than HDA8077. Additional property tests were conducted on MA956. To accommodate the limited thermal fatigue capability of ODS alloys, two segmented, mechanically attached, low strain ODS combustor design concepts having predicted fatigue lives or 10,000 engine cycles were identified. One of these was a relatively conventional louvered geometry, while the other involved a transpiration cooled configuration. A series of 10,000 cycle combustor rig tests on subscale MA956 and Hastelloy X combustor components showed no cracking, thereby confirming the beneficial effect of the segmented design on thermal fatigue capability. These tests also confirmed the superior oxidation and thermal distortion resistance of the ODS alloy. A hybrid PW2037 inner burner liner containing MA956 and Hastelloy X components was designed and constructed.

Henricks, R.J.; Sheffler, K.D.

1984-02-01T23:59:59.000Z

406

DOE/EIA-0358  

U.S. Energy Information Administration (EIA) Indexed Site

58 Report on the 1980 Manufacturing Industries Energy Consumption Study and Survey of Large Combustors Energy Information Administration Washington, D.C. January 1983 ; This...

407

Risk assessment of an oxygen-enhanced combustor using a structural model based on the FMEA and fuzzy fault tree  

Science Journals Connector (OSTI)

Abstract The oxygen-enhanced combustor has the advantages of high burning efficiency and low emissions. However, it should not be promoted for industrial use until its reliability and safety have been fully recognized. A new methodology is proposed to assess the risk of an oxygen-enhanced combustor using a structural model based on the FMEA and fuzzy fault tree. In addition, it is applied to a selected pilot semi-industrial combustor. To identify the hazard source comprehensively, the pilot is divided into four subsystems: the combustor subsystem, feed subsystem, ignition subsystem and exhaust subsystem. According to the operational parameters of flow (flow rate, temperature and pressure) and the component functions in different subsystems, the cause and effect matrix can be built using the structural model, and the relationship between the operational parameters and the effects of the change for the operational parameters on the system can be presented. Based on the results of cause and effect matrix, the FMEA can be built to describe the failed models and accident scenarios of the pilot. The main accident forms include leakage, injury, fire and explosion. Accordingly, with the severity and probability analysis of different accident forms, the fire and explosion accidents should be further accessed quantitatively using the fuzzy fault tree analysis. The fault trees can be obtained in accordance with the FMEA, and the qualitative assessments of the basic events can be collected by using expert scoring. A hybrid approach for the fuzzy set theory and weight analysis is investigated to quantify the occurrence probability of basic events. Then, the importance analysis of the fault trees, including the hazard importance of basic events and the cut set importance, is performed to help determine the weak links of the fire and explosion trees. Finally, some of the most effective measures are presented to improve the reliability and safety of the combustion system.

Zhen Chen; Xiaona Wu; Jianguo Qin

2014-01-01T23:59:59.000Z

408

The development of a cyclonic combustor for high particulate, low caloric value gas produced by a fluidized bed  

E-Print Network [OSTI]

methods, utilizing a biomass source, are: combustion, pyrolysis, gasification, and bio-degradation processes. Direct combustion is envisioned as the most immediately available conversion technology. However, there is considerable interest... the combustion of a low caloric value (LCV) and high particulate gas. Performance tests were conducted to verify the cyclone combustor design flexibility by identifying satisfactory performance characteristics. The LCV gas was produced from the gasification...

Cardenas, Manuel Moises

1985-01-01T23:59:59.000Z

409

Recent Development in Oxy-Combustion Technology and Its Applications to Gas Turbine Combustors and ITM Reactors  

Science Journals Connector (OSTI)

Recent Development in Oxy-Combustion Technology and Its Applications to Gas Turbine Combustors and ITM Reactors ... Also, the application of oxy-combustion technology into gas turbines is possible; however, the combustion temperature will be increased tremendously, which needs more control to make safe the turbine blades. ... technologies, a simplified model of a power plant with two forms of CO2 capture was developed. ...

Mohamed A. Habib; Medhat Nemitallah; Rached Ben-Mansour

2012-11-19T23:59:59.000Z

410

Impacts of Large-scale Surface Modifications on Meteorological Conditions and Energy Use: A 10-Region Modeling Study  

E-Print Network [OSTI]

J. , 1997a: Peak power and cooling energy savings of high-J. , 1997b: Peak power and cooling energy savings of shade

Taha, H.

2011-01-01T23:59:59.000Z

411

Regeneratively cooled coal combustor/gasifier with integral dry ash removal  

DOE Patents [OSTI]

A coal combustor/gasifier is disclosed which produces a low or medium combustion gas for further combustion in modified oil or gas fired furnaces or boilers. Two concentric shells define a combustion volume within the inner shell and a plenum between them through which combustion air flows to provide regenerative cooling of the inner shell for dry ash operation. A fuel flow and a combustion air flow having opposed swirls are mixed and burned in a mixing-combustion portion of the combustion volume and the ash laden combustion products flow with a residual swirl into an ash separation region. The ash is cooled below the fusion temperature and is moved to the wall by centrifugal force where it is entrained in the cool wall boundary layer. The boundary layer is stabilized against ash re-entrainment as it is moved to an ash removal annulus by a flow of air from the plenum through slots in the inner shell, and by suction on an ash removal skimmer slot.

Beaufrere, Albert H. (Huntington, NY)

1983-10-04T23:59:59.000Z

412

Effect of fuel injection velocity on MILD combustion of syngas in axially-staged combustor  

Science Journals Connector (OSTI)

Abstract The role of fuel injection velocity on MILD (Moderate or Intense Low-oxygen Dilution) combustion of coal-derived syngas was examined in an axially staged combustor, where the secondary air was mixed with the flue gases from the gas generation zone to produce hot and diluted oxidant prior to its mixing with the secondary fuel. The global flame signatures, OH? radicals distribution, and exhaust emissions were obtained through experimental measurements, while the mixing behavior between the secondary fuel and oxidant was numerically studied. Higher secondary fuel injection velocity within 199–299 m/s facilitated the earlier entrainment of oxidizer into the secondary fuel and increased the flame lift-off height, resulting in a lower flame temperature, a more distributed reaction zone and reduced \\{NOx\\} emissions, but higher pressure loss and CO formation. The MILD regime yields lower \\{NOx\\} emissions compared to the traditional diffusion combustion mode, and the N2O-intermediate mechanism dominates the NO production in the syngas MILD flame with adiabatic flame temperature lower than 1565 K according to the prediction of the chemical reactor network model.

Ming-ming Huang; Wei-wei Shao; Yan Xiong; Yan Liu; Zhe-dian Zhang; Fu-lin Lei; Yun-han Xiao

2014-01-01T23:59:59.000Z

413

Search for a heavy gauge boson W' in the final state with an electron and large missing transverse energy in pp collisions at ?s = 7 TeV  

E-Print Network [OSTI]

A search for a heavy gauge boson W? has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse energy imbalance E[miss over T], using proton–proton collision data ...

Wyslouch, Boleslaw

414

Structure of the -Al2O3,,0001... surface from low-energy electron diffraction: Al termination and evidence for anomalously large thermal vibrations  

E-Print Network [OSTI]

Structure of the -Al2O3,,0001... surface from low-energy electron diffraction: Al termination structure of -Al2O3(0001). Sapphire surfaces are prepared in three different ways, and the diffraction, the clearly favored structure has a single Al layer termination and a large first interlayer contraction

Soares, Edmar Avellar

415

Development of a dry low-NOx gas turbine combustor for a natural-gas fueled 2MW co-generation system  

SciTech Connect (OSTI)

A dry low-NOx gas turbine combustor has been developed for natural-gas fueled co-generation systems in the power range of 1--4MW. The combustor. called the Double Swirler Combustor, uses the lean premixed combustion to reduce NOx emission. The combustor is characterized by two staged lean premixed combustion with two coaxial annular burners and a simple fuel control system without the complex variable geometry. Substantially low NOx level has been achieved to meet the strict NOx regulation to co-generation systems in Japan. High combustion efficiency has been obtained for a wide operating range. In 1994, Tokyo Gas and Ishikawajima-Harima Heavy Industries initiated a collaborative program to develop a natural-gas fueled low NOx gas turbine engine for new 2MW class co-generation system, named IM270. The Double Swirler Combustor, originally developed by Tokyo Gas, was introduced into the natural gas fueled version of the IM270. Engine test of the first production unit was successfully conducted to confirm substantially low NOx level of less than 15 ppm (O{sub 2} = 16%) with the output power of more than 2MW. Test for the durability and the reliability of the system is being conducted at Tokyo Gas Negishi LNG Terminal in Kanagawa, Japan and successful results have been so far obtained.

Mori, Masaaki; Sato, Hiroshi

1998-07-01T23:59:59.000Z

416

The WiggleZ Dark Energy Survey: probing the epoch of radiation domination using large-scale structure  

Science Journals Connector (OSTI)

......research-article Article The WiggleZ Dark Energy Survey: probing the epoch of radiation...using data from the WiggleZ Dark Energy Survey. We find this feature to lie...using data from the WiggleZ Dark Energy Survey (Drinkwater et-al. 2010......

Gregory B. Poole; Chris Blake; David Parkinson; Sarah Brough; Matthew Colless; Carlos Contreras; Warrick Couch; Darren J. Croton; Scott Croom; Tamara Davis; Michael J. Drinkwater; Karl Forster; David Gilbank; Mike Gladders; Karl Glazebrook; Ben Jelliffe; Russell J. Jurek; I-hui Li; Barry Madore; D. Christopher Martin; Kevin Pimbblet; Michael Pracy; Rob Sharp; Emily Wisnioski; David Woods; Ted K. Wyder; H. K. C. Yee

2013-01-01T23:59:59.000Z

417

Reducing the CO2 emissions and the energy dependence of a large city area with zero-emission vehicles and nuclear energy  

Science Journals Connector (OSTI)

Abstract This paper aims to study the feasibility of implementing a strategic plan for a gradual introduction of zero-emission vehicles in the city of Madrid during 2014–2024. The study estimate the amount of emissions saved if the electrical energy needed for the vehicles is generated with nuclear power plants. The use of zero-emission vehicles could play an important role in reducing our dependence on oil and, therefore, changing the economy structure of the country. Therefore, as a representing city, Madrid's nowadays situation is studied. The city's vehicle fleet is first considered and classified. An average both daily and annually fuel consumption is made, in order to know the city's gasoline investment. Moreover, the health effects of air pollution, which is largely due to the city's vehicles, are statistically considered in order to analyze the economic impact of treating these effects. Furthermore, noise pollution and it's both direct and indirect consequences are studied. After having analyzed Madrid's situation, a comparison between some international cities and the Spanish capital is made, regarding their vehicle fleet and their environmental and economical consequences. European environmental policy and future criteria are exposed. Regarding the technical feasibility, two types of zero-emission technologies are considered, the battery-electric car and de hydrogen fuel cell vehicle (FCV). After having described the benefits and disadvantages of the use of zero-emission vehicles, a macroeconomic analysis is done in order to study the economic feasibility of the project. To do this, not only several economic variables, such as gross domestic product in the area, but also survey data, such as the average daily driving time are considered. Finally, a strategic plan for a gradual implementation of zero-emission vehicles in the city of Madrid is proposed, taking into account the quantity of emissions saved if the electrical energy needed is generated with nuclear power plants. In this plan, some policy actions are proposed for a gradual implementation. Policy actions such as special fees for those driving internal combustion engine vehicles, free parking for zero-emission vehicles or even a subsidized car replacement plan.

Gonzalo Jimenez; Jose Miguel Flores

2015-01-01T23:59:59.000Z

418

On integrating large eddy simulation and laboratory turbulent flow experiments  

Science Journals Connector (OSTI)

...effective simulation strategy mostly by necessity...its analysis and development, further understanding...directed research and development program at Los...multi-swirl gas turbine combustor. Proc...simulation of a gas turbine combustor flow...

2009-01-01T23:59:59.000Z

419

Acoustic characterization of a partially-premixed gas turbine model combustor: Syngas and hydrocarbon fuel comparisons  

Science Journals Connector (OSTI)

In this work, the acoustic behavior of a combustion instability in a gas turbine model combustor was investigated as fuel properties, air flow rates, and burner geometry were varied. The dual-swirl burner, developed at DLR Stuttgart by Meier, was operated using syngas (H2/CO), ethylene, propane, and methane. The frequency of the instability was found to vary significantly from 250 to 480 Hz. When the plenum volume and the exhaust pipe length and diameter were changed, the frequencies followed trends similar to a Helmholtz resonator. The variation of fuel type, flame speed, and air flow rate greatly altered the instability frequency and amplitude. These effects are not predicted by Helmholtz or organ tone acoustic theory. Higher frequencies were correlated with larger laminar burning velocities and higher air flow rates. The burner is a forced resonator, in which the flame oscillations couple with the flowfield to create convectively altered Helmholtz resonances. This suggests the need for an improved model of a forced Helmholtz resonator that includes flame properties. Alkane fuels displayed similar acoustic trends, but ethylene varied greatly from methane and propane. Syngas displayed different behavior than hydrocarbon fuels, even when the laminar flame speeds of the fuels were matched between ethylene and a syngas mixture. Flame characteristics such as anchoring, liftoff height, and shape appear to play a major role in the determination of instability strength and presence. With increasing hydrogen-content in the syngas-mixture, the flame transitions from a lifted to a fully anchored flame, resulting in a drastic decrease in the acoustic amplitude associated with non-resonating flames. Rayleigh indices show that flat flames create strong regions of thermo-acoustic coupling compared to axially extended V-shape flames. It is concluded that, in the current burner configuration, integrated-acoustics occur that involve a combination of Helmholtz and convective-mechanisms.

Patton M. Allison; James F. Driscoll; Matthias Ihme

2013-01-01T23:59:59.000Z

420

Effects of syngas composition on combustion induced vortex breakdown (CIVB) flashback in a swirl stabilized combustor  

Science Journals Connector (OSTI)

Flame flashback attributed to combustion induced vortex breakdown (CIVB) is a major design challenge for swirl stabilized burner combustors. This paper presents an experimental investigation of combustion induced vortex breakdown (CIVB) flashback propensity for flames yielded from Hydrogen (H2)–Carbon Monoxide (CO) fuel blends and actual synthesized gas (syngas) mixtures. A two-fold experimental approach, consisting of a high definition digital imaging system and a high speed PIV system, was employed. The main emphasis was on the effect of concentration of different constituents in fuel mixtures on flashback limit. In addition, the effect of Swirl Number on flashback propensity was discussed. The percentage of H2 in fuel mixtures played the dominant role when CIVB flashback occurred. For a given air mass flow rate, the mixture containing a higher percentage of H2 underwent flashback at much leaner conditions. Flashback maps for actual syngas fuel compositions showed a distinct behavior when various concentrations of diluents were introduced in the mixture. For the two major diluents tested, carbon dioxide (CO2) and nitrogen dioxide (NO2), CO2 was more dominant. The effect of Swirl Number on the flashback propensity was also tested and showed a decrease with an increase in Swirl Number. The final portion of this paper also provides an analysis of flow field of reacting flames which revealed complex vortex–chemistry interactions leading to vortex breakdown and flashback. Based on the experimental results a parametric model similar to Peclet Number approach was developed employing a flame quenching concept. A value of the quench parameter, Cquench was obtained from the correlation of flow Peclet Number and flame Peclet Number, which was observed to be dominated by the fuel composition rather than Swirl Number.

Bidhan Dam; Gilberto Corona; Mir Hayder; Ahsan Choudhuri

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

The Effects of Fuel Distribution, Velocity Distribution, and Fuel Composition on Static and Dynamic Instabilities and NOx Emissions in Lean Premixed Combustors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Distribution, and Fuel Composition on Static and Dynamic Instabilities and NO x Emissions in Lean Premixed Combustors Principal Investigator: Domenic A. Santavicca SCIES Project 03-01-SR109 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (7/01/03, 36 month duration) $403,777 Total Contract Value ($403,777 DOE) * Lower Emissions * Improved Static and Dynamic Stability * Fuel Versatility * Improved Design Methodology UTSR Workshop,10-18-05,DAS Gas Turbine Technology Needs * to determine the effect of combustor operating conditions on the static and dynamic stability characteristics of lean premixed combustors operating on natural gas and coal-derived syngas fuels * to develop a methodology for predicting the effect of

422

Groundwater contaminant interaction with aquifer thermal energy storage systems on the scale of a large urban area.  

E-Print Network [OSTI]

??This research thesis attempts to answer the question if a pathline analysis can be applied to a transient flow field where aquifer thermal energy storage… (more)

Lieshout, R. van

2013-01-01T23:59:59.000Z

423

Cross spectra between temperature and pressure in a constant area duct downstream of a hydrogen fueled combustor  

Science Journals Connector (OSTI)

It was shown in a recent paper [J. H. Miles and E. A. Krejsa J. Acoust. Soc. Am. 72 2008–2019 (1982)] that knowledge of pressure?temperature auto spectra and cross spectra could be used in a model for sound propagation in a variable duct having acoustic and convected entropy fluctuations. The present exploratory study investigates the measurement of pressure?temperature cross spectra and coherence and temperature cross spectra and coherence at well separated points in a combustion rig. Data obtained near the inlet and the exit of a 6.44?m?long duct attached to a J?47 combustor fueled with hydrogen are presented.

J. H. Miles; C. A. Wasserbauer; E. A. Krejsa

1983-01-01T23:59:59.000Z

424

A Large-Scale Test of Free-Energy Simulation Estimates of Protein–Ligand Binding Affinities  

Science Journals Connector (OSTI)

We have performed a large-scale test of alchemical perturbation calculations with the Bennett acceptance-ratio (BAR) approach to estimate relative affinities for the binding of 107 ligands to 10 different proteins. Employing 20-Å truncated spherical ...

Paulius Mikulskis; Samuel Genheden; Ulf Ryde

2014-09-29T23:59:59.000Z

425

Model As-of Right Zoning Ordinance or Bylaw: Allowing Use of Large-Scale Solar Energy Facilities  

Broader source: Energy.gov [DOE]

Note: This model ordinance was designed to provide guidance to local governments seeking to develop siting rules for large-scale, ground-mounted solar (250 kW and above). While it was developed as...

426

Understanding the symmetry energy using data from the ALADIN-2000 Collaboration taken at the GSI Large Neutron Detector  

Science Journals Connector (OSTI)

The present study deals with the extraction of the symmetry energy from heavy-ion collisions at intermediate energies. Using the isospin quantum molecular dynamical (IQMD) model, the dependence of the sum of the charge number for fragments with Z?2(Zbound) on the multiplicity of neutrons (Mn) from the projectile spectator fragmentation of 124Sn and 124La at 600 MeV/nucleon is compared with the experimental results of the ALADIN-2000 Collaboration. The comparison suggests a soft symmetry energy. In addition, the sensitivities of the symmetry energy toward the Zbound dependence on proton multiplicity (Mp), neutron-to-proton single [R(n/p)] and double ratio [RD(n/p)], are also examined. The Zbound dependence of R(n/p) is found to be the most sensitive observable toward the symmetry energy. The ALADIN Collaboration should extend the results for R(n/p) in the near future.

Sanjeev Kumar and Y. G. Ma (???)

2012-11-21T23:59:59.000Z

427

Understanding the impact of large-scale penetration of micro combined heat & power technologies within energy systems/  

E-Print Network [OSTI]

Significant energy challenges today come from security of supply and environmental concerns. Those surpass the quest for economic efficiency that has been the primary objective until recent times. In an intensive fossil-fuel ...

Tapia-Ahumada, Karen de los Ángeles

2011-01-01T23:59:59.000Z

428

Discussion on the Energy-Saving Potential of a Hybrid System in a Large Space Building in Different Areas  

E-Print Network [OSTI]

The use of a hybrid ventilation system is promoted to decrease the annual energy consumption of air conditioning. The switch-point of temperature, which is related with weather conditions, is presented to control the hybrid system properly...

Liu, S.; Huang, C.

2006-01-01T23:59:59.000Z

429

J.R. Simplot: Burner Upgrade Project Improves Performance and Saves Energy at a Large Food Processing Plant  

Broader source: Energy.gov [DOE]

This case study describes how the J.R. Simplot Company saved energy and money by increasing the efficiency of the steam system in its potato processing plant in Caldwell, Idaho.

430

Efficacy of LEED-certification in reducing energy consumption and greenhouse gas emission for large New York City office buildings  

Science Journals Connector (OSTI)

Abstract In this paper 2011 energy consumption, green house gas (GHG) emission, and ENERGY STAR Energy Performance Rating (EPR) data for 953 office buildings in New York City are examined. The data were made public as a result of New York City's local law 84. Twenty-one of these office buildings were identified as LEED-certified, providing the opportunity for direct comparison of energy performance data for LEED and non-LEED buildings of the same type, time frame, and geographical and climate region. With regard to energy consumption and GHG emission the LEED-certified buildings, collectively, showed no savings as compared with non-LEED buildings. The subset of the LEED buildings certified at the Gold level outperformed other NYC office buildings by 20%. In contrast LEED Silver and Certified office buildings underperformed other NYC office buildings. The average EPR for the LEED buildings was 78, 10 pts higher than that for all NYC office buildings, raising questions about the validity and interpretation of these EPR's. This work suggests that LEED building certification is not moving NYC toward its goal of climate neutrality. The results also suggest the need to re-examine some aspects of ENERGY STAR's benchmarking tool.

John H. Scofield

2013-01-01T23:59:59.000Z

431

Combustion of high-sulfur coal and anthracite wastes in a rotary kiln combustor with an advanced internal air distributor  

SciTech Connect (OSTI)

Fluid bed combustors have received extensive testing with both high-sulfur coal and anthracite wastes. Rotary kilns are effective and popular devices for waste combustion. The Angelo Rotary Furnace{trademark} has been developed to improve the operation of rotary pyrolyzer/combustor systems through enhanced air distribution, which in this process is defined as staged, swirled combustion air injection. Fourteen of these new furnaces have been installed worldwide. Two units in Thailand, designed for rice hull feed with occasional lignite feed, have been recently started up. An older unit in Pennsylvania is being upgraded with a new, more advanced air distribution system for a series of tests this fall in which inexpensive high-sulfur coal and anthracite wastes will be fired with limestone. The purposes of these tests are to determine the burning characteristics of these two fuels in this system, to discover the Ca/S ratios necessary for operation of a rotary kiln combusting these fuels, and to observe the gas-borne emissions from the furnace. An extensive preliminary design study will be performed on a commercial installation for combustion of anthracite wastes. 14 refs., 5 figs., 1 tab.

Cobb, J.T. Jr. (Pittsburgh Univ., PA (USA)); Ahn, Y.K. (Gilbert/Commonwealth, Inc., Reading, PA (USA)); Angelo, J.F. (Universal Energy International, Inc., Little Rock, AR (USA))

1990-01-01T23:59:59.000Z

432

The effects and characteristics of hydrogen in SNG on gas turbine combustion using a diffusion type combustor  

Science Journals Connector (OSTI)

Abstract Converting coal to natural gas may be one of the alternative solutions for satisfying the demand for natural gas. However, synthetic natural gas (SNG) has not been proven effective in natural gas-fired power plants. In this research, several combustion tests using a diffusion type combustor were conducted to determine the effect of hydrogen content in SNG on gas turbine combustion. Three kinds of SNG with different H2 content up to 3%vol were used for the combustion tests. Even a small amount of hydrogen in SNG affects the flame structure: it shortened the flame length and enlarged the flame angle slightly. However, hydrogen content up to 3% in SNG did not affect the gas turbine combustion characteristics, which are emission performance and combustion efficiency. Due to a similarity with real gas turbine combustor conditions for power generation, a high pressure combustion test helped us verify the ambient pressure combustion tests conducted to determine the effect of hydrogen in SNG. In the high pressure combustion test, the pattern factors were identical even though the hydrogen content was varied from 0% to 3%.

Seik Park; Uisik Kim; Minchul Lee; Sungchul Kim; Dongjin Cha

2013-01-01T23:59:59.000Z

433

Uncertainties of Estimates of Inertia–Gravity Energy in the Atmosphere. Part II: Large-Scale Equatorial Waves  

Science Journals Connector (OSTI)

This paper analyzes the spectra and spatiotemporal features of the large-scale inertia-gravity (IG) circulations in four analysis systems in the tropics. Of special interest is the Kelvin wave (KW), which represents between 7% and 25% of the ...

N. Žagar; J. Tribbia; J. L. Anderson; K. Raeder

2009-11-01T23:59:59.000Z

434

A multiple objective decision making model for energy generation portfolio under fuzzy uncertainty: Case study of large scale investor-owned utilities in Florida  

Science Journals Connector (OSTI)

Abstract The objective of this paper is to present a methodology to evaluate the viability of developing solar photovoltaic projects for large investor-owned utilities. By taking into account the trade-off between the cost per kWh of electricity generation and total risk for an investor-owned utility, a multi-objective model of the energy generation portfolios is developed. The decision making model can determine the proportion of different energy generation sources in an investor-owned utility portfolio that reduces risk while providing the lowest cost per kWh of electricity generation possible. In order to measure the risk of the investor-owned utility for energy portfolio selection, an investigation of possible dangers and failures of energy generation portfolios is made and 9 main failure modes are identified. The failure mode and effects analysis is employed to calculate the risk priority numbers for each risk. To deal with the uncertainties of the levelized cost of electricity and risk levels of failure modes, the fuzzy method is introduced and an equivalent crisp model is derived which is then solved by employing a multiple objective particle swarm optimization algorithm. The analysis for four large scale investor-owned utilities in Florida is presented to highlight the performance of the developed optimization method.

Ziqiang Zeng; Ehsan Nasri; Abdol Chini; Robert Ries; Jiuping Xu

2015-01-01T23:59:59.000Z

435

PHYSICAL REVIEW C 81, 044910 (2010) Production of exotic atoms at energies available at the CERN Large Hadron Collider  

E-Print Network [OSTI]

one of the ions in the collider ("bound-free" pair production). In particular the process of pair several insights in the production mechanism which have not been explored in the literature. OurPHYSICAL REVIEW C 81, 044910 (2010) Production of exotic atoms at energies available at the CERN

Bertulani, Carlos A. - Department of Physics and Astronomy, Texas A&M University

436

Low energy positron diffraction from Cu(111): Importance of surface loss processes at large angles of incidence  

SciTech Connect (OSTI)

Intensities of positrons specularly diffracted from Cu(111) were measured at the Brandeis positron beam facility and analyzed in the energy range 8eVenergies strong energy dependences occur associated both with multiple elastic scattering phenomena within atomic layers of Cu parallel to the surface and with the thresholds of inelastic channels (e.g., plasmon creation). Use of the free electron calculation of V{sub i} shows that energy dependence of inelastic processes is necessary to obtain a satisfactory description of the absolute magnitude of the diffracted intensities below E = 50eV. Detailed comparison of the calculated and observed diffraction intensities reveals the necessity of incorporating surface loss processes explicitly into the model in order to achieve a quantitative description of the measured intensities for E<40eV and {theta}>40{degree}. 30 refs., 5 figs., 1 tab.

Lessor, D.L. (Pacific Northwest Lab., Richland, WA (USA)); Duke, C.B. (Xerox Corp., Webster, NY (USA). Webster Research Center); Lippel, P.H.; Brandes, G.R.; Canter, K.F.; Horsky, T.N. (Brandeis Univ., Waltham, MA (USA). Dept. of Physics)

1990-10-01T23:59:59.000Z

437

Chapter 11 - Operation of Independent Large-Scale Battery-Storage Systems in Energy and Reserve Markets  

Science Journals Connector (OSTI)

Abstract In this chapter, we consider a scenario where a group of investor-owned independently-operated storage units seek to offer energy and reserve in the day-ahead market and energy in the hour-ahead market. We are particularly interested in the case where a significant portion of the power generated in the grid is from wind and other intermittent renewable energy resources. In this regard, we formulate a stochastic programming framework to choose optimal energy and reserve bids for the storage units that takes into account the fluctuating nature of the market prices due to the randomness in the renewable power generation availability. We show that the formulated stochastic program can be converted to a convex optimization problem to be solved efficiently. Our simulation results also show that our design can assure profitability of the private investment on storage units. We also investigate the impact of various design parameters, such as the size and location of the storage unit on increasing the profit.

Hossein Akhavan-Hejazi; Hamed Mohsenian-Rad

2015-01-01T23:59:59.000Z

438

Hausdorff and packing spectra, large deviations, and free energy for branching random walks in $\\R^d$  

E-Print Network [OSTI]

Consider an $\\R^d$-valued branching random walk (BRW) on a supercritical Galton Watson tree. Without any assumption on the distribution of this BRW we compute, almost surely and simultaneously, the Hausdorff and packing dimensions of the level sets $E(K)$ of infinite branches in the boundary of the tree (endowed with its standard metric) along which the averages of the BRW have a given closed connected set of limit points $K$. This goes beyond multifractal analysis, which only considers those level sets when $K$ ranges in the set of singletons $\\{\\alpha\\}$, $\\alpha\\in\\R^d$. We also give a $0$-$\\infty$ law for the Hausdorff and packing measures of the level sets $E(\\{\\alpha\\})$, and compute the free energy of the associated logarithmically correlated random energy model in full generality. Moreover, our results complete the previous works on multifractal analysis by including the levels $\\alpha$ which do not belong to the range of the gradient of the free energy. This covers in particular a situation until now badly understood, namely the case where a first order phase transition occurs. As a consequence of our study, we can also describe the whole singularity spectrum of Mandelbrot measures, as well as the associated free energy function (or $L^q$-spectrum), when a first order phase transition occurs.

Najmeddine Attia; Julien Barral

2014-03-20T23:59:59.000Z

439

Abstract--The use of doubly fed induction generators (DFIGs) in large wind energy conversion systems (WECS) has  

E-Print Network [OSTI]

) to enable the variable speed operation of the wind turbine. Moreover, it provides reactive power support candidate in the wind energy conversion systems (WECS) due to its advantages [2- 5]. When compared to fixed-speed induction generators, the DFIG has the advantages of maximum power capture, less mechanical stresses

Pota, Himanshu Roy

440

Features of Muon Arrival Time Distributions of High Energy EAS at Large Distances From the Shower Axis  

E-Print Network [OSTI]

In view of the current efforts to extend the KASCADE experiment (KASCADE-Grande) for observations of Extensive Air Showers (EAS) of primary energies up to 1 EeV, the features of muon arrival time distributions and their correlations with other observable EAS quantities have been scrutinised on basis of high-energy EAS, simulated with the Monte Carlo code CORSIKA and using in general the QGSJET model as generator. Methodically various correlations of adequately defined arrival time parameters with other EAS parameters have been investigated by invoking non-parametric methods for the analysis of multivariate distributions, studying the classification and misclassification probabilities of various observable sets. It turns out that adding the arrival time information and the multiplicity of muons spanning the observed time distributions has distinct effects improving the mass discrimination. A further outcome of the studies is the feature that for the considered ranges of primary energies and of distances from the shower axis the discrimination power of global arrival time distributions referring to the arrival time of the shower core is only marginally enhanced as compared to local distributions referring to the arrival of the locally first muon.

I. M. Brancus; H. Rebel; A. F. Badea; A. Haungs; C. D. Aiftimiei; J. Oehlschlaeger; M. Duma

2002-12-20T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Evaluation of the Potential Environmental Impacts from Large-Scale Use and Production of Hydrogen in Energy and Transportation Applications  

SciTech Connect (OSTI)

The purpose of this project is to systematically identify and examine possible near and long-term ecological and environmental effects from the production of hydrogen from various energy sources based on the DOE hydrogen production strategy and the use of that hydrogen in transportation applications. This project uses state-of-the-art numerical modeling tools of the environment and energy system emissions in combination with relevant new and prior measurements and other analyses to assess the understanding of the potential ecological and environmental impacts from hydrogen market penetration. H2 technology options and market penetration scenarios will be evaluated using energy-technology-economics models as well as atmospheric trace gas projections based on the IPCC SRES scenarios including the decline in halocarbons due to the Montreal Protocol. Specifically we investigate the impact of hydrogen releases on the oxidative capacity of the atmosphere, the long-term stability of the ozone layer due to changes in hydrogen emissions, the impact of hydrogen emissions and resulting concentrations on climate, the impact on microbial ecosystems involved in hydrogen uptake, and criteria pollutants emitted from distributed and centralized hydrogen production pathways and their impacts on human health, air quality, ecosystems, and structures under different penetration scenarios

Wuebbles, D.J.; Dubey, M.K., Edmonds, J.; Layzell, D.; Olsen, S.; Rahn, T.; Rocket, A.; Wang, D.; Jia, W.

2010-06-01T23:59:59.000Z

442

Matter & Energy Wind Energy  

E-Print Network [OSTI]

See Also: Matter & Energy Wind Energy Energy Technology Physics Nuclear Energy Petroleum 27, 2012) -- Energy flowing from large-scale to small-scale places may be prevented from flowing, indicating that there are energy flows from large to small scale in confined space. Indeed, under a specific

Shepelyansky, Dima

443

A survey on energy storage resources configurations in order to propose an optimum configuration for smoothing fluctuations of future large wind power plants  

Science Journals Connector (OSTI)

Abstract As the wind power capacity increases, the effect of wind power fluctuations on the system stability becomes more significant. Despite its high costs, utilizing energy storage resources such as batteries is inevitable in the smoothing process of wind power fluctuations. In a wind power plant, the place where batteries are located has considerable direct effect on their required capacity and thus on the initial investment cost. Therefore, in this paper a suitable configuration which significantly reduces the batteries investment cost is proposed and then the wind power fluctuation of a large wind power plant connected to a smart distribution grid is smoothed. Additionally, existing configurations for installing batteries in large wind power plants are investigated. The proposed configuration utilizes smart parks as aggregated storage resources in load side and an aggregated battery energy storage system with limited capacity in plant side as well. Therefore, in addition to accurate smoothing of wind power fluctuations, the energy storage investment cost is reduced significantly utilizing the proposed configuration. Simulation studies in MATLAB software package are carried out to verify the performance of the proposed approach.

M. Jannati; S.H. Hosseinian; B. Vahidi; Guo-Jie Li

2014-01-01T23:59:59.000Z

444

MULTIDIMENSIONAL NUMERICAL SIMULATION OF THE REACTING FLOW IN A PULSE COMBUSTOR \\Lambda  

E-Print Network [OSTI]

, which in turn enhances the rate of combustion, resulting in a self­sustaining, large­scale oscillation

445

Final Environmental Impact Statement for the JEA Circulating Fluidized Bed Combustor Project  

SciTech Connect (OSTI)

This EIS assesses environmental issues associated with constructing and demonstrating a project that would be cost-shared by DOE and JEA (formerly the Jacksonville Electric Authority) under the Clean Coal Technology Program. The project would demonstrate circulating fluidized bed (CFB) combustion technology at JEA's existing Northside Generating Station in Jacksonville, Florida, about 9 miles northeast of the downtown area of Jacksonville. The new CFB combustor would use coal and petroleum coke to generate nearly 300 MW of electricity by repowering the existing Unit 2 steam turbine, a 297.5-MW unit that has been out of service since 1983. The proposed project is expected to demonstrate emission levels of sulfur dioxide (SO{sub 2}), oxides of nitrogen (NO{sub x}), and particulate matter that would be lower than Clean Air Act limits while at the same time producing power more efficiently and at less cost than conventional coal utilization technologies. At their own risk, JEA has begun initial construction activities without DOE funding. Construction would take approximately two years and, consistent with the original JEA schedule, would be completed in December 2001. Demonstration of the proposed project would be conducted during a 2-year period from March 2002 until March 2004. In addition, JEA plans to repower the currently operating Unit 1 steam turbine about 6 to 12 months after the Unit 2 repowering without cost-shared funding from DOE. Although the proposed project consists of only the Unit 2 repowering, this EIS analyzes the Unit 1 repowering as a related action. The EIS also considers three reasonably foreseeable scenarios that could result from the no-action alternative in which DOE would not provide cost-shared funding for the proposed project. The proposed action, in which DOE would provide cost-shared finding for the proposed project, is DOE's preferred alternative. The EIS evaluates the principal environmental issues, including air quality, traffic, noise, and ecological resources, that could result from construction and operation of the proposed project. Key findings include that maximum modeled increases in ground-level concentrations of SO{sub 2} nitrogen dioxide (NO{sub 2}), and particulate matter (for the proposed project alone or in conjunction with the related action) would always be less than 10% of their corresponding standards for increases in pollutants. For potential cumulative air quality impacts, results of modeling regional sources and the proposed project indicate that the maximum 24-hour average SO{sub 2} concentration would closely approach (i.e., 97%) but not exceed the corresponding Florida standard. After the Unit 1 repowering, results indicate that the maximum 24-hour average SO{sub 2} concentration would be 91% of the Florida standard. Concentrations for other averaging periods and pollutants would be lower percentages of their standards. Regarding toxic air pollutants from the proposed project, the maximum annual cancer risk to a member of the public would be approximately 1 in 1 million; given the conservative assumptions in the estimate, the risk would probably be less. With regard to threatened and endangered species, impacts to manatees, gopher tortoises, and other species would be negligible or non-existent. Construction-induced traffic would result in noticeable congestion. In the unlikely event that all coal were transported by rail, up to 3 additional trains per week would exacerbate impacts associated with noise, vibration, and blocked roads at on-grade rail crossings. Additional train traffic could be minimized by relying more heavily on barges and ships for coal transport, which is likely to be a more economic fuel delivery mode. During construction of the proposed project, noise levels would increase from the current operational levels. Except possibly during steam blowouts and possibly during operation of equipment used to construct a nearby segment of a conveyor, construction noise should not appreciably affect the background noise of nearby residences or exceed local nois

N /A

2000-06-30T23:59:59.000Z

446

STATE OF CALIFORNIA -NATURAL RESOURCES AGENCY EDMUND G. BROWN JR. Governor CALIFORNIA ENERGY COMMISSION  

E-Print Network [OSTI]

STATE OF CALIFORNIA - NATURAL RESOURCES AGENCY EDMUND G. BROWN JR.· Governor CALIFORNIA ENERGY of the combustion gas turbines units in an extended start-up period for the purpose of tuning the units following combustors shall not exceed the following limits, except during times of startup or shutdown, as defined

447

Large Scale Computing Requirements for Basic Energy Sciences (An BES / ASCR / NERSC Workshop) Hilton Washington DC/Rockville Meeting Center, Rockville MD 3D Geophysical Imaging  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Requirements Requirements for Basic Energy Sciences (An BES / ASCR / NERSC Workshop) Hilton Washington DC/Rockville Meeting Center, Rockville MD 3D Geophysical Modeling and Imaging G. A. Newman Lawrence Berkeley National Laboratory February 9 - 10 , 2010 Talk Outline * SEAM Geophysical Modeling Project - Its Really Big! * Geophysical Imaging (Seismic & EM) - Its 10 to 100x Bigger! - Reverse Time Migration - Full Waveform Inversion - 3D Imaging & Large Scale Considerations - Offshore Brazil Imaging Example (EM Data Set) * Computational Bottlenecks * Computing Alternatives - GPU's & FPGA's - Issues Why ? So that the resource industry can tackle grand geophysical challenges (Subsalt imaging, land acquisition, 4-D, CO2, carbonates ......) SEAM Mission Advance the science and technology of applied

448

Search for Diphoton Events with Large Missing Transverse Energy in 6.3 fb-1 of ppbar Collisions using the D0 Detector at the Fermilab Tevatron Collider  

SciTech Connect (OSTI)

A search for diphoton events with large missing transverse energy produced in p{bar p} collisions at {radical}s = 1.96 TeV is presented. The data were collected with the D0 detector at the Fermilab Tevatron Collider between 2002 and 2010, and correspond to 6.3 fb{sup -1} of integrated luminosity. The observed missing transverse energy distribution is well described by the Standard Model prediction, and 95% C.L. limits are derived on two realizations of theories beyond the Standard Model. In a gauge mediated supersymmetry breaking scenario, the breaking scale {Lambda} is excluded for {Lambda} < 124 TeV. In a universal extra dimension model including gravitational decays, the compactification radius R{sub c} is excluded for R{sub c}{sup -1} < 477 GeV.

Cooke, Mark Stephen; /Columbia U.

2010-09-01T23:59:59.000Z

449

A verification study on saving energy cost and reducing CO2 emission with large-scale geothermal heat pump systems in Korea  

Science Journals Connector (OSTI)

This paper presents economic and environmental effects by using monitoring data collected over a 2-yr period in geothermal heating and cooling facilities in Jungwon University Korea. The facility has heating capacity of 7045?kW and cooling capacity of 5947?kW. Such monitoring data are rarely reported in the literature; thus the evaluation based on long-term operational data will contribute greatly to the objective assessment of the geothermal heat pump system (GHPS) as a renewable energy resource. The effects of relative energy cost saving and reductions in CO2 emission were predicted for comparison with conventional heating and cooling systems. The GHPS was estimated to reduce energy costs by 76.4%–85.3% and yield a reduction of CO2 emission of 398–595 tons annually. We also conducted an economic analysis using the benefit/cost ratio (BCR) method according to scenarios in which the lifespan and discount rate for the GHPS were varied. Since the BCR for the GHPS was in the range of 1.99–3.58 (case 1) and 1.67–3.01 (case 2) GHPS is considered to be more economic than other types of heating and cooling systems. These results provide evidentiary data to help overcome skepticism over the applicability of large-scale GHPSs.

Byeong-Hak Park; Hyoung-Soo Kim; Kang-Kun Lee

2013-01-01T23:59:59.000Z

450

A cost-effective backward Lagrangian method for simulation of pollutant formation in gas turbine combustors by post-processing of complex 3D calculations  

Science Journals Connector (OSTI)

A backward Lagrangian Monte Carlo modelling is proposed to calculate by post-processing the PDF of the thermo-chemical parameters of complex turbulent reactive flows simulated with a simple turbulent combustion model. PDF's of minor species such as pollutant species (NOx, soot, unburnt hydrocarbons...) can be easily obtained as long as these species have no significant influence on the main features of the flow. A numerical validation and an example of application of the method to a real burner are presented. If the number of points where information is sought is limited the cost of the method in terms of CPU time is very low and the statistical error can be perfectly controlled. With a first application to a semi-technical scale combustor producing soot the method has been proved very promising for the prediction of pollutant in complex turbulent reactive flows of gas turbine combustors.

Francis Dupoirieux; Nicolas Bertier; Aymeric Boucher; Pascale Gilbank

2014-01-01T23:59:59.000Z

451

The study of flame dynamics and structures in an industrial-scale gas turbine combustor using digital data processing and computer vision techniques  

Science Journals Connector (OSTI)

In this paper, a combined effort has been made to study the flame dynamics and structures in a gas turbine combustor using a range of imaging and digital data processing techniques. The acoustic characteristics of the combustor have been investigated extensively. It is found that there is no straightforward way to alter the peak frequency of one of the peculiar combustion modes of the rig. High speed imaging is applied to investigate the flame dynamics and quantitative analysis of the image database has been demonstrated. The results show that the frequency spectrum of the mean pixel image intensity of seeded flame is in good agreement with the acoustic spectrum. To recover the loss in depth information present in conventional imaging technique, both the optical and digital stereo imaging techniques have been applied. The important flame position relative to the combustion chamber could be resolved.

W.B. Ng; K.J. Syed; Y. Zhang

2005-01-01T23:59:59.000Z

452

Designing Turbine Endwalls for Deposition Resistance with 1,400 °C Combustor Exit Temperatures and Syngas Water Vapor Levels„The Ohio State University  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Designing Turbine Endwalls for Designing Turbine Endwalls for Deposition Resistance with 1,400 °C Combustor Exit Temperatures and Syngas Water Vapor Levels-The Ohio State University Background This University Turbine Systems Research (UTSR) project will explore a critical need for innovative turbine endwall designs that could increase turbine durability and mitigate the adverse effects of residue deposition from coal-derived synthesis gas (syngas). The Ohio State University (OSU), in cooperation with Brigham Young University (BYU),

453

Dilution-based emissions sampling from stationary sources: part 2 - gas-fired combustors compared with other fuel-fired systems  

SciTech Connect (OSTI)

With the recent focus on fine particle matter (PM2.5), new, self- consistent data are needed to characterize emissions from combustion sources. Emissions data for gas-fired combustors are presented, using dilution sampling as the reference. The sampling and analysis of the collected particles in the presence of precursor gases, SO{sub 2}, nitrogen oxide, volatile organic compound, and NH{sub 3} is discussed; the results include data from eight gas fired units, including a dual- fuel institutional boiler and a diesel engine powered electricity generator. These data are compared with results in the literature for heavy-duty diesel vehicles and stationary sources using coal or wood as fuels. The results show that the gas-fired combustors have very low PM2.5 mass emission rates in the range of {approximately}10{sup -4} lb/million Btu (MMBTU) compared with the diesel backup generator with particle filter, with {approximately} 5 x 10{sup -3} lb/MMBTU. Even higher mass emission rates are found in coal-fired systems, with rates of {approximately} 0.07 lb/MMBTU for a bag-filter-controlled pilot unit burning eastern bituminous coal. The characterization of PM2.5 chemical composition from the gas-fired units indicates that much of the measured primary particle mass in PM2.5 samples is organic or elemental carbon and, to a much less extent, sulfate. Metal emissions are low compared with the diesel engines and the coal- or wood-fueled combustors. The metals found in the gas- fired combustor particles are low in concentration. The interpretation of the particulate carbon emissions is complicated by the fact that an approximately equal amount of particulate carbon is found on the particle collector and a backup filter. It is likely that measurement artifacts are positively biasing 'true' particulate carbon emissions results. 49 refs., 1 fig., 12 tabs.

England, G.C.; Watson, J.G.; Chow, J.C.; Zielinska, B.; Chang, M.C.O.; Loos, K.R.; Hidy. G.M. [GE Energy, Santa Ana, CA (United States)

2007-01-15T23:59:59.000Z

454

Destruction and formation of PCDD/Fs in a fluidised bed combustor co-incinerating automotive shredder residue with refuse derived fuel and wastewater treatment sludge  

Science Journals Connector (OSTI)

During an eight day trial automotive shredder residue (ASR) was added to the usual waste feed of a Fluidized Bed Combustor (FBC) for waste-to-energy conversion; the input waste mix consisted of 25% ASR, 25% refuse-derived fuel (RDF) and 50% wastewater treatment (WWT) sludge. All inputs and outputs were sampled and the concentration of the 17 PCDD/Fs with TEF-values was determined in order to obtain “PCDD/F fingerprints”. The ASR contained approximately 9000 ng PCDD/Fs/kgDW, six times more than the RDF and 10 times more than the WWT sludge. The fingerprint of ASR and RDF was dominated by HpCDD and OCDD, which accounted for 90% of the total PDDD/F content, whereas the WWT sludge contained relatively more HpCDFs and OCDF (together 70%). The flue gas cleaning residue (FGCR) and fly and boiler ash contained approximately 30,000 and 2500 ng PCDD/Fs/kgDW, respectively. The fingerprints of these outputs were also dominated by HpCDFs and OCDF. The bottom ash contained only OCDD and OCDF, in total 8 ng PCDD/Fs/kgDW. From the comparison of the bottom ash fingerprints with the fingerprints of the other output fractions and of the inputs, it could be concluded that the PCDD/Fs in the waste were destroyed and new PCDD/Fs were formed in the post combustion process by de novo synthesis. During the ASR-co-incineration, the PCDD/F congener concentrations in the fly and boiler ash, FGCR and flue gas were 1.25–10 times higher compared to the same output fractions generated during incineration of the usual waste mix (70% RDF and 30% WWT sludge). The concentration of the higher chlorinated PCDD/Fs increased most. As these congeners have the lowest TEF-factors, the total PCDD/F output, expressed in kg TEQ/year, of the FBC did not increase significantly when ASR was co-incinerated. Due to the relatively high copper levels in the ASR, the copper concentrations in the \\{FBCs\\} outputs increased. As copper catalysis the de novo syntheses, this could explain the increase in PCDD/F concentrations in these outputs.

J. Van Caneghem; I. Vermeulen; C. Block; A. Van Brecht; P. Van Royen; M. Jaspers; G. Wauters; C. Vandecasteele

2012-01-01T23:59:59.000Z

455

MATE (Materials for Advanced Turbine Engines) Program, Project 3. Volume 2: Design, fabrication and evaluation of an oxide dispersion strengthened sheet alloy combustor liner. Final report  

SciTech Connect (OSTI)

The suitability of wrought oxide dispersion strengthened (ODS) superalloy sheet for gas turbine engine combustor applications was evaluated. Two yttria (Y2O3) dispersion strengthened alloys were evaluated; Incoloy MA956 and Haynes Development Alloy (HDA) 8077 (NiCrAl base). Preliminary tests showed both alloys to be potentially viable combustor materials, with neither alloy exhibiting a significant advantage over the other. MA956 was selected as the final alloy based on manufacturing reproducibility for evaluation as a burner liner. A hybrid PW2037 inner burner liner containing MA956 and Hastelloy X components and using a louvered configuration was designed and constructed. The louvered configuration was chosen because of field experience and compatibility with the bill of material PW2037 design. The simulated flight cycle for the ground based engine tests consisted of 4.5 min idle, 1.5 min takeoff and intermediate conditions in a PW2037 engine with average uncorrected combustor exit temperature of 1527 C. Post test evaluation consisting of visual observations and fluorescent penetrant inspections was conducted after 500 cycles of testing. No loss of integrity in the burner liner was shown.

Bose, S.; Sheffler, K.D.

1988-02-01T23:59:59.000Z

456

Analysis of non-adiabatic heat-recirculating combustors Paul D. Ronney  

E-Print Network [OSTI]

combustion are discussed. #12;1 Introduction Recently interest in heat-recirculating "excess enthalpy times more energy per unit mass than lithium-ion batteries, thus devices converting of fuel

457

Study of biomass combustion characteristics for the development of a catalytic combustor/gasifier.  

E-Print Network [OSTI]

??The research reported here explored, a "new" approach to biomass energy conversion for small-scale process heat-applications. The conversion process uses close-coupled catalytic. combustion to burn… (more)

Dody, Joseph W.

2012-01-01T23:59:59.000Z

458

Large eddy simulation applications in gas turbines  

Science Journals Connector (OSTI)

...exhaust plume development. The application...modelling in the gas turbine combustor...modelling strategies for the complex...flows in the gas turbine, as surveyed...of typical gas turbine parts necessitates...made in the development and application...

2009-01-01T23:59:59.000Z

459

Development of a coal fired pulse combustor for residential space heating. Technical progress report, July--September 1987  

SciTech Connect (OSTI)

The systematic development of the residential combustion system is divided into three phases. Only Phase I is detailed here. Phase I constitutes the design, fabrication, testing, and evaluation of a pulse combustor sized for residential space heating. Phase II is an optional phase to develop an integrated system including a heat exchanger. Phase III is projected as a field test of the integrated coal-fired residential space heater. The Phase I effort was nearing completion during this reporting period and a final report is in preparation. The configuration testing was completed early in the period and based upon results of the configuration tests, an optimized configuration for the experimental development testing was chosen. The refractory-lined chambers were fabricated and tested from mid-September through early October. The tandem unit was operated on dry micromized coal without support gas or excitation air for periods lasting from one to three hours. Performance was stable and turndown ratios of 3:1 were achieved during the first three-hour test. A early commercial residential heating system configuration has been identified on the basis of the development testing conducted throughout the first phase of this effort. The development effort indicates that the residential unit goals are achievable with some additional product improvement effort to increase carbon burn-out efficiency, reduce CO emissions and develop a reliable and compact dry, ultrafine coal feed system (not included in the present effort).

NONE

1987-12-31T23:59:59.000Z

460

Emissions Characteristics of a Turbine Engine and Research Combustor Burning a Fischer?Tropsch Jet Fuel  

Science Journals Connector (OSTI)

GTL and CTL technologies were discovered in Germany in the mid-1910s and further developed in 1923 by German scientists Drs. ... The Department of Energy (DOE) National Energy Technology Laboratory and the Fuels Branch of the Air Force Research Laboratory (AFRL/PRTG) established a collaborative research and development program in 2000 to study and demonstrate clean aviation fuels as part of the DOE Ultra Clean Transportation Fuels Initiative. ... 21 Gaseous emissions were quantified using an MKS MultiGas 2030 Fourier-transform infrared based gas analyzer and a flame ionization detector based total hydrocarbon analyzer. ...

Edwin Corporan; Matthew J. DeWitt; Vincent Belovich; Robert Pawlik; Amy C. Lynch; James R. Gord; Terrence R. Meyer

2007-07-17T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Optimum energy and by-product recovery in chlorinated hydrocarbon disposal systems  

SciTech Connect (OSTI)

This paper covers the three principal areas of a chlorinated hydrocarbon waste disposal system for a typical vinyl chloride monomer facility. These are the incineration, the energy recovery system, and the by-product recovery system. It is shown that the overall efficiency of the energy and by-product recovery systems is dependent on the optimization of the primary combustor (incineration system). 11 refs.

Santoleri, J.J.

1982-01-01T23:59:59.000Z

462

Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energy newsroomassetsimagesenergy-icon.png Energy Research into alternative forms of energy, and improving and securing the power grid, is a major national security...

463

Determination of Solar Energy Transition Potential of Large Organizations| An Application to Department of Defense Facilities and Non-Tactical Vehicles.  

E-Print Network [OSTI]

?? The Department of Defense offers a great opportunity to implement solar energy solutions across its United States bases. It is the single largest energy… (more)

Castillo, Ariel S.

2011-01-01T23:59:59.000Z

464

Evaluation of cement production using a pressurized fluidized-bed combustor  

SciTech Connect (OSTI)

There are several primary conclusions which can be reached and used to define research required in establishing the feasibility of using PFBC-derived materials as cement feedstock. 1. With appropriate blending almost any material containing the required cement-making materials can be utilized to manufacture cement. However, extensive blending with multiple materials or the use of ash in relatively small quantities would compromise the worth of this concept. 2. The composition of a potential feedstock must be considered not only with respect to the presence of required materials, but just as significantly, with respect to the presence and concentration of known deleterious materials. 3. The processing costs for rendering the feedstock into an acceptable composition and the energy costs associated with both processing and burning must be considered. It should be noted that the cost of energy to produce cement, expressed as a percentage of the price of the product is higher than for any other major industrial product. Energy consumption is, therefore, a major issue. 4. The need for conformance to environmental regulations has a profound effect on the cement industry since waste materials can neither be discharged to the atmosphere or be shipped to a landfill. 5. Fifth, the need for achieving uniformity in the composition of the cement is critical to controlling its quality. Unfortunately, certain materials in very small concentrations have the capability to affect the rate and extent to which the cementitious compound in portland cement are able to form. Particularly critical are variations in the ash, the sulfur content of the coal or the amount and composition of the stack dust returned to the kiln.

DeLallo, M.; Eshbach, R.

1994-01-01T23:59:59.000Z

465

3 kHz PIV/OH-PLIF measurements in a gas turbine combustor at elevated pressure  

Science Journals Connector (OSTI)

Abstract This study was designed to test the feasibility of acquiring simultaneous PIV/OH-PLIF measurements at multi-kHz rates in a turbulent swirl flame at pressures relevant to modern industrial gas turbine combustors. To accomplish this, particle image velocimetry (PIV) and planar laser-induced fluorescence of the hydroxyl radical (OH-PLIF) were applied simultaneously at 3 kHz to study the dynamics of a lean partially-premixed turbulent swirl-stabilized flame of natural gas in an optically accessible, high-pressure combustion test rig at 5 bars. With 0.25 mJ/pulse at 283 nm for the OH-PLIF measurements, an average signal-to-noise ratio (SNR) of 4.1 was achieved over a region measuring 20 × 80 mm. Absorption of the excitation laser proved to be the greatest challenge in this study, resulting in a significant variation in SNR from one side of the OH-PLIF images to the other. A procedure based on modeling the absorption according to the mean OH-distribution was used to semi-quantitatively correct for this effect. A gradient-based edge-detection algorithm was used to identify reaction zone locations in the resulting images. These were used to compute mean distributions of the flame surface density. With 2.5 mJ/pulse at 532 nm for the PIV system, velocity fields measuring 20 × 80 mm were measured at a resolution of 1.25 mm. Consistent with prior measurements in the burner, the flame shows strong thermo-acoustic pulsation, with a peak frequency of 388 Hz. Phase-averages of the PIV and OH? data indicate these pulsations are driven by the same resonant feedback mechanism responsible for thermo-acoustic pulsation in the burner at atmospheric pressure. No evidence of a precessing vortex core, known to dominate the flow-field of the burner at atmospheric-pressure conditions, was observed.

I. Boxx; C. Slabaugh; P. Kutne; R.P. Lucht; W. Meier

2014-01-01T23:59:59.000Z

466

Induction and Persistence of Large ?H2AX Foci by High Linear Energy Transfer Radiation in DNA-Dependent protein kinase–Deficient Cells  

SciTech Connect (OSTI)

Purpose: To evaluate the cell response to DNA double-strand breaks induced by low and high linear energy transfer (LET) radiations when the catalytic subunit of DNA-dependent protein kinase (DNA-PKcs), an essential protein of the nonhomologous end-joining repair pathway, lacks kinase activity. Methods and Materials: CHO10B2, a Chinese hamster ovary cell line, and its derived radiosensitive mutant cell line, irs-20, lacking DNA-PKcs activity, were evaluated after 0 to 3 Gy of ?-rays, plateau and Bragg peak protons, and lithium beams by clonogenic assay, and as a measurement of double-strand breaks, phosphorylated H2AX (?H2AX) foci number and size were quantified by immunocytofluorescence. Results: Irs-20 exhibited greater radiosensitivity and a higher amount of ?H2AX foci than CHO10B2 at 6 hours after irradiation for all types of radiations. Remarkably, CHO10B2 and irs-20 maintained their difference in radiosensitivity after high-LET radiation. Six hours after low-LET radiations, irs-20 did not reach basal levels of ?H2AX at high doses, whereas CHO10B2 recovered basal levels for all doses. After high-LET radiation, only CHO10B2 exhibited a reduction in ?H2AX foci, but it never reached basal levels. Persistent foci in irs-20 confirmed a repair deficiency. Interestingly, after 30 minutes of high-LET radiation both cell lines exhibited large foci (size >0.9 ?m{sup 2}) related to the damage nature, whereas at 6 hours irs-20 showed a higher amount of large foci than CHO10B2, with a 7-fold increase at 3 Gy, that could also be associated to radiosensitivity. Conclusions: We demonstrated, for the first time, an association between deficient DNA-PKcs activity and not only high levels of H2AX phosphorylation but also persistence and size increase of ?H2AX foci after high-LET irradiation.

Bracalente, Candelaria; Ibañez, Irene L. [Departamento de Micro y Nanotecnología, Comisión Nacional de Energía Atómica, San Martín, Buenos Aires (Argentina); Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires (Argentina); Molinari, Beatriz [Departamento de Radiobiología, Comisión Nacional de Energía Atómica, San Martín, Buenos Aires (Argentina); Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires (Argentina); Palmieri, Mónica [Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires (Argentina); Kreiner, Andrés [Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires (Argentina); Gerencia de Investigación y Aplicaciones, Comisión Nacional de Energía Atómica, San Martín, Buenos Aires (Argentina); Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, San Martín, Buenos Aires (Argentina); Valda, Alejandro [Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, San Martín, Buenos Aires (Argentina); and others

2013-11-15T23:59:59.000Z

467

Effect of fuel properties on the bottom ash generation rate by a laboratory fluidized bed combustor  

SciTech Connect (OSTI)

The range of fuels that can be accommodated by an FBC boiler system is affected by the ability of the fuel, sorbent, and ash-handling equipment to move the required solids through the boiler. Of specific interest is the bottom ash handling equipment, which must have sufficient capacity to remove ash from the system in order to maintain a constant bed inventory level, and must have sufficient capability to cool the ash well below the bed temperature. Quantification of a fuel's bottom ash removal requirements can be useful for plant design. The effect of fuel properties on the rate of bottom ash production in a laboratory FBC test system was examined. The work used coal products ranging in ash content from 20 to 40+ wt. %. The system's classification of solids by particle size into flyash and bottom ash was characterized using a partition curve. Fuel fractions in the size range characteristic of bottom ash were further analyzed for distributions of ash content with respect to specific gravity, using float sink tests. The fuel fractions were then ashed in a fixed bed. In each case, the highest ash content fraction produced ash with the coarsest size consist (characteristic of bottom ash). The lower ash content fractions were found to produce ash in the size range characteristic of flyash, suggesting that the high ash content fractions were largely responsible for the production of bottom ash. The contributions of the specific gravity fractions to the composite ash in the fuels were quantified. The fuels were fired in the laboratory test system. Fuels with higher amounts of high specific gravity particles, in the size ranges characteristic of bottom ash, were found to produce more bottom ash, indicating the potential utility of float sink methods in the prediction of bottom ash removal requirements.

Rozelle, P.L.; Pisupati, S.V.; Scaroni, A.W. [Penn State University, University Park, PA (United States). Dept. of Energy & Geoenvironmental Engineering

2007-06-15T23:59:59.000Z

468

Sorbent utilization prediction methodology: sulfur control in fluidized-bed combustors  

SciTech Connect (OSTI)

The United States Government has embarked on an ambitious program to develop and commercialize technologies to efficiently extract energy from coal in an environmentally acceptable manner. One of the more promising new technologies for steam and power generation is the fluidized-bed combustion of coal. In this process, coal is burned in a fluidized bed composed mainly of calcined limestone sorbent. The calcium oxide reacts chemically to capture the sulfur dioxide formed during the combustion and to maintain the stack gas sulfur emissions at acceptable levels. The spent sulfur sorbent, containing calcium sulfate, is a dry solid that can be disposed of along with coal ash or potentially used. Other major advantages of fluidized-bed combustion are the reduction in nitrogen oxide emissions because of the relatively low combustion temperatures, the capability of burning wide varieties of fuel, the high carbon combustion efficiencies, and the high heat-transfer coefficients. A key to the widespread commercialization of fluidized-bed technology is the ability to accurately predict the amount of sulfur that will be captured by a given sorbent. This handbook meets this need by providing a simple, yet reliable, user-oriented methodology (the ANL method) that allows performance of a sorbent to be predicted. The methodology is based on only three essential sorbent parameters, each of which can be readily obtained from standardized laboratory tests. These standard tests and the subsequent method of data reduction are described in detail.

Fee, D.C.; Wilson, W.I.; Shearer, J.A.; Smith, G.W.; Lenc, J.F.; Fan, L.S.; Myles, K.M.; Johnson, I.

1980-09-01T23:59:59.000Z

469

An innovative bed temperature-oriented modeling and robust control of a circulating fluidized bed combustor  

Science Journals Connector (OSTI)

Circulating fluidized bed (CFB) combustion systems are increasingly used as superior coal burning systems in power generation due to their higher efficiency and lower emissions.