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

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. Since batteries have low specific energy (~200 kJ/kg) and liquid hydrocarbon fuels have a very high specific energy (~50000 kJ/kg), a miniaturized power-generating device, even with a relatively inefficient conversion of hydrocarbon fuels to power, would result in increased lifetime and/or reduced weight of an electronic or mechanical system that currently requires batteries for power. Energy conversion from chemical energy to electrical energy without any moving parts can be achieved by a thermophotovoltaic (TPV) system. The TPV system requires a radiation source which is provided by a micro-combustor. Because of the high surface area to volume ratio for micro-combustor, there is high heat loss (proportional to area) compared to heat generation (proportional to volume). Thus the quenching and flammability problems are more critical in a micro-scale combustor. Hence innovative schemes are required to improve the performance of micro-combustion. In the current study, a micro-scale counter flow combustor with heat recirculation is adapted to improve the flame stability in combustion modeled for possible application to a TPV system. The micro-combustor consists of two annular tubes with an inner tube of diameter 3 mm and 30 mm long and an outer tube of 4.2 mm diameter and 30 mm long. The inner tube is supplied with a cold premixed combustible mixture, ignited and burnt. The hot produced gases are then allowed to flow through outer tube which supplies heat to inner tube via convection and conduction. The hot outer tube radiates heat to the TPV system. Methane is selected as the fuel. The model parameters include the following: diameter d , inlet velocity u , equivalence ratio Ï� and heat recirculation efficiency �· between the hot outer flow and cold inner flow. The predicted performance results are as followings: the lean flammability limit increased from 7.69% to 7.86% and the quenching diameter decreased from 1.3 mm to 0.9 mm when heat recirculation was employed. The overall energy conversion efficiency of current configuration is about 2.56.

Lei, Yafeng

2005-08-01T23:59:59.000Z

3

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

E-Print Network (OSTI)

The average and fluctuating components in a model ring-type gas turbine combustor are characterized using a Large Eddy Simulation at a Reynolds number of 11,000, based on the bulk velocity and the mean channel height. A spatial filter is applied to the incompressible Navier-Stokes equations, and a high pass filtered Smagorinsky model is used to model the sub-grid scales. Two cases are studied: one with only the swirler inlet active, and one with a single row of dilution jets activated, operating at a momentum flux ratio J of 100. The goal of both of these studies is to validate the capabilities of the solver NEK5000 to resolve important flow features inherent to gas turbine combustors by comparing qualitatively to the work of Jakirlic. Both cases show strong evidence of the Precessing Vortex Core, an essential flow feature in gas turbine combustors. Each case captures other important flow characteristics, such as corner eddies, and in general predicts bulk flow movements well. However, the simulations performed quite poorly in terms of predicting turbulence shear stress quantities. Difficulties in properly emulating the turbulent velocity entering the combustor for the swirl, as well as mesh quality concerns, may have skewed the results. Overall, though small length scale quantities were not accurately captured, the large scale quantities were, and this stress test on the HPF LES model will be built upon in future work that looks at more complex combustors.

Camp, Joshua Lane

2011-05-01T23:59:59.000Z

4

Oxycombustion In Transport Oxy-Combustor - Energy Innovation ...  

Substantially pure oxygen is fed to the transport oxy-combustor under pressure to combust fossil fuels, generating steam for power generation.

5

Combustor design tool for a gas fired thermophotovoltaic energy converter  

DOE Green Energy (OSTI)

Recently, there has been a renewed interest in thermophotovoltaic (TPV) energy conversion. A TPV device converts radiant energy from a high temperature incandescent emitter directly into electricity by photovoltaic cells. The current Department of Energy sponsored research involves the design, construction and demonstration of a prototype TPV converter that uses a hydrocarbon fuel (such as natural gas) as the energy source. As the photovoltaic cells are designed to efficiently convert radiant energy at a prescribed wavelength, it is important that the temperature of the emitter be nearly constant over its entire surface. The US Naval Academy has been tasked with the development of a small emitter (with a high emissivity) that can be maintained at 1,756 K (2,700 F). This paper describes the computer spreadsheet model that was developed as a tool to be used for the design of the high temperature emitter.

Lindler, K.W.; Harper, M.J. [Naval Academy, Annapolis, MD (United States). Naval Architecture, Ocean and Marine Engineering Dept.

1995-07-01T23:59:59.000Z

6

LIF Applications for Practical Combustors  

Science Conference Proceedings (OSTI)

This study demonstrates the applicability of LIF in several practical combustors. Temperature and species concentration were measured inside industrial model burners, gas turbine combustors, diesel engines, and large scale industrial burners. This visualization ... Keywords: combustion, laser, laser induced fluorescence, nitrogen oxide, reaction mechanism

Y. Deguchi; H. Nakagawa; T. Ichinose; M. Inada

1999-12-01T23:59:59.000Z

7

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

8

Parametric performance analysis of steam-injected gas turbine with a thermionic-energy-converter-lined combustor  

SciTech Connect

The performance of steam-injected gas turbines having combustors lined with thermionic energy converters (STIG/TEC systems) was analyzed and compared with that of two baseline systems a steam-injected gas turbine (without a TEC-lined combustor) and a conventional combined gas turbine/steam turbine cycle. Common gas turbine parameters were assumed for all of the systems. Two configurations of the STIG/TEC system were investigated. In both cases, steam produced in an exhaust-heat-recovery boiler cools the TEC collectors. It is then injected into the gas combustion stream and expanded through the gas turbine. The STIG/TEC system combines the advantage of gas turbine steam injection with the conversion of high-temperature combustion heat by TEC's. The addition of TEC's to the baseline steam-injected gas turbine improves both its efficiency and specific power. Depending on system configuration and design parameters, the STIG/TEC system can also achieve higher efficiency and specific power than the baseline combined cycle.

Choo, Y.K.; Burns, R.K.

1982-02-01T23:59:59.000Z

9

Power MEMS 2005, Nov. 28-30, 2005, Tokyo, Japan We have developed a large-entrainment-ratio micro ejector to supply fuel-air mixture for a catalytic combustor. As the key  

E-Print Network (OSTI)

ejector has achieved a maximum air-to-butane volume flow rate ratio of 43 when the back pressure employs butane as the fuel because it has both high energy density (13300 Wh/kg) and favorable storage. The requirement of designing an ejector for a butane combustor is to achieve an air-to-butane volume flow rate

Kasagi, Nobuhide

10

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

11

Large Energy Users Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

12

Fuel cell system combustor  

DOE Patents (OSTI)

A fuel cell system including a fuel reformer heated by a catalytic combustor fired by anode and cathode effluents. The combustor includes a turbulator section at its input end for intimately mixing the anode and cathode effluents before they contact the combustors primary catalyst bed. The turbulator comprises at least one porous bed of mixing media that provides a tortuous path therethrough for creating turbulent flow and intimate mixing of the anode and cathode effluents therein.

Pettit, William Henry (Rochester, NY)

2001-01-01T23:59:59.000Z

13

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

14

Gas turbine combustor transition  

DOE Patents (OSTI)

A method of 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.

Coslow, Billy Joe (Winter Park, FL); Whidden, Graydon Lane (Great Blue, CT)

1999-01-01T23:59:59.000Z

15

Coal desulfurization in a rotary kiln combustor  

Science Conference Proceedings (OSTI)

The purpose of this project was to demonstrate the combustion of coal and coal wastes in a rotary kiln reactor with limestone addition for sulfur control. The rationale for the project was the perception that rotary systems could bring several advantages to combustion of these fuels, and may thus offer an alternative to fluid-bed boilers. Towards this end, an existing wood pyrolysis kiln (the Humphrey Charcoal kiln) was to be suitably refurbished and retrofitted with a specially designed version of a patented air distributor provided by Universal Energy, Inc. (UEI). As the project progressed beyond the initial stages, a number of issues were raised regarding the feasibility and the possible advantages of burning coals in a rotary kiln combustor and, in particular, the suitability of the Humphrey Charcoal kiln as a combustor. Instead, an opportunity arose to conduct combustion tests in the PEDCO Rotary Cascading-Bed Boiler (RCBB) commercial demonstration unit at the North American Rayon CO. (NARCO) in Elizabethton, TN. The tests focused on anthracite culm and had two objectives: (a) determine the feasibility of burning anthracite culms in a rotary kiln boiler and (b) obtain input for any further work involving the Humphrey Charcoal kiln combustor. A number of tests were conducted at the PEDCO unit. The last one was conducted on anthracite culm procured directly from the feed bin of a commercial circulating fluid-bed boiler. The results were disappointing; it was difficult to maintain sustained combustion even when large quantities of supplemental fuel were used. Combustion efficiency was poor, around 60 percent. The results suggest that the rotary kiln boiler, as designed, is ill-suited with respect to low-grade, hard to burn solid fuels, such as anthracite culm. Indeed, data from combustion of bituminous coal in the PEDCO unit suggest that with respect to coal in general, the rotary kiln boiler appears inferior to the circulating fluid bed boiler.

Cobb, J.T. Jr.

1992-09-11T23:59:59.000Z

16

Flow interaction in the combustor-diffusor system of industrial gas turbines  

SciTech Connect

This paper presents an experimental/computational study of cold flow in the combustor-diffuser system of industrial gas turbines to address issues relating to flow interactions and pressure losses in the pre- and dump diffusers. The present configuration with can annular combustors differs substantially from the aircraft engines which typically use a 360 degree annular combustor. Experiments were conducted in a one-third scale, annular 360-degree model using several can combustors equispaced around the turbine axis. A 3-D computational fluid dynamics analysis employing the multidomain procedure was performed to supplement the flow measurements. The measured data correlated well with the computations. The airflow in the dump diffuser adversely affected the prediffuser flow by causing it to accelerate in the outer region at the prediffuser exit. This phenomenon referred to as the sink-effect also caused a large fraction of the flow to bypass much of the dump diffuser and go directly from the prediffuser exit to the bypass air holes on the combustor casing, thereby, rendering the dump diffuser ineffective in diffusing the flow. The dump diffuser was occupied by a large recirculation region which dissipated the flow kinetic energy. Approximately 1.2 dynamic head at the prediffuser inlet was lost in the combustor-diffuser system; much of it in the dump diffuser where the fluid passed through the narrow gaps and pathways. Strong flow interactions in the combustor-diffuser system indicate the need for design modifications which could not be addressed by empirical correlations based on simple flow configurations.

Agrawal, A.K. [Univ. of Oklahoma, Norman, OK (United States); Kapat, J.S.; Yang, T. [Clemson Univ., SC (United States). Dept. of Mechanical Engineering

1996-05-01T23:59:59.000Z

17

Energy Basics: Large-Scale Hydropower  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Large-Scale Hydropower Microhydropower Hydropower Resources...

18

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

19

Low NOx Advanced Vortex Combustor  

SciTech Connect

A 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 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/unburned hydrocarbon (UHC) emissions of 4/4/0 ppmv (all emissions corrected to 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated marked 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, the measured 1.75% pressure drop is significantly lower than conventional gas turbine combustors, which could translate into an overall gas turbine cycle efficiency improvement. The relatively high velocities and low pressure drop achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

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

2008-05-01T23:59:59.000Z

20

Steam reformer with catalytic combustor  

DOE Patents (OSTI)

A steam reformer is disclosed having an annular steam reforming catalyst bed formed by concentric cylinders and having a catalytic combustor located at the center of the innermost cylinder. Fuel is fed into the interior of the catalytic combustor and air is directed at the top of the combustor, creating a catalytic reaction which provides sufficient heat so as to maintain the catalytic reaction in the steam reforming catalyst bed. Alternatively, air is fed into the interior of the catalytic combustor and a fuel mixture is directed at the top. The catalytic combustor provides enhanced radiant and convective heat transfer to the reformer catalyst bed.

Voecks, Gerald E. (La Crescenta, CA)

1990-03-20T23:59:59.000Z

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.


21

Federal Energy Management Program: Large-scale Renewable Energy Projects  

NLE Websites -- All DOE Office Websites (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

22

Combustor burner vanelets  

DOE Patents (OSTI)

The present application provides a burner for use with a combustor of a gas turbine engine. The burner may include a center hub, a shroud, a pair of fuel vanes extending from the center hub to the shroud, and a vanelet extending from the center hub and/or the shroud and positioned between the pair of fuel vanes.

Lacy, Benjamin (Greer, SC); Varatharajan, Balachandar (Loveland, OH); Kraemer, Gilbert Otto (Greer, SC); Yilmaz, Ertan (Albany, NY); Zuo, Baifang (Simpsonville, SC)

2012-02-14T23:59:59.000Z

23

Achieving improved cycle efficiency via pressure gain combustors  

SciTech Connect

As part of the Department of Energy`s Advanced Gas Turbine Systems Program, an investigation is being performed to evaluate ``pressure gain`` combustion systems for gas turbine applications. This paper presents experimental pressure gain and pollutant emission data from such combustion systems. Numerical predictions for certain combustor geometries are also presented. It is reported that for suitable aerovalved pulse combustor geometries studied experimentally, an overall combustor pressure gain of nearly 1 percent can be achieved. It is also shown that for one combustion system operating under typical gas turbine conditions, NO{sub x} and CO emmissions, are about 30 ppmv and 8 ppmv, respectively.

Gemmen, R.S.; Janus, M.C.; Richards, G.A.; Norton, T.S. [USDOE Morgantown Energy Technology Center, WV (United States); Rogers, W.A. [EG& G Technical Services of West Virginia, Morgantown, WV (United States)

1995-04-01T23:59:59.000Z

24

Large-Scale Renewable Energy Guide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

25

Process Energy Audit for Large Industries  

E-Print Network (OSTI)

This paper discusses the author's approach to energy audits of large industries. Five large industrial segments, with energy intensive processes have been selected as examples. Items include: 1) the general methodology of conducting comprehensive industrial energy audit, 2) how one can identify energy efficiency opportunities, and 3) illustrate a few case study examples of energy conservation measures implemented in some of the industries, and 4) the importance of quality assurance/quality control in an energy audit. I will restrict this discussion to only electrical energy audit.

Chari, S.

1993-03-01T23:59:59.000Z

26

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

27

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

28

Pulse Combustor Design, A DOE Assessment  

NLE Websites -- All DOE Office Websites (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

29

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

30

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"

31

The Very Large Hadron Collider: The farthest energy frontier  

E-Print Network (OSTI)

THE VERY LARGE HADRON COLLIDER: THE FARTHEST ENERGY FRONTIERAbstract The Very Large Hadron Collider (or Eloisatron)

Barletta, William A.

2001-01-01T23:59:59.000Z

32

Catalytic Combustor for Fuel-Flexible Turbine  

SciTech Connect

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

33

Catalytic Combustor for Fuel-Flexible Turbine  

SciTech Connect

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

34

Catalytic Combustor for Fuel-Flexible Turbine  

SciTech Connect

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

35

Particle-jet interactions in an MHD second stage combustor  

DOE Green Energy (OSTI)

An Argonne two-phase combustion flow computer code is used to simulate reacting flows to aid in the development of an advanced combustor for magnetohydrodynamic power generation. The combustion code is a general hydrodynamics computer code for two-phase, two- dimensional, steady state, turbulent, and reacting flows, based on mass, momentum, and energy conservation laws for multiple gas species and particles. The combustion code includes turbulence, integral combustion, and particle evaporation submodels. A recently developed integral combustion submodel makes calculations more efficient and more stable while still preserving the major physical effects of the complex combustion processes. The combustor under investigation is a magnetohydrodynamic second stage combustor in which opposed jets of oxidizer are injected into a confined cross-stream of hot coal gas flow following a first stage swirl combustor. The simulation is intended to enhance the understanding the of seed particle evaporation in the combustor and evaluate the effects of combustor operating conditions on seed particle evaporation and vapor dispersion, which directly affect overall magnetohydrodynamic power generation. Computation results show that oxidizer jet angle and particle size may greatly affect particle evaporation and vapor dispersion. At a jet angle about 130 degrees, particle evaporation rate is the highest because of the highest average gas temperature. As particle size increases beyond 10 microns in diameter, the effects of particle size on wall deposition rate, evaporation delay, and downstream seed vapor dispersion become more pronounced. 16 refs., 10 figs.

Lottes, S.A.; Chang, S.L.

1992-01-01T23:59:59.000Z

36

Particle-jet interactions in an MHD second stage combustor  

DOE Green Energy (OSTI)

An Argonne two-phase combustion flow computer code is used to simulate reacting flows to aid in the development of an advanced combustor for magnetohydrodynamic power generation. The combustion code is a general hydrodynamics computer code for two-phase, two- dimensional, steady state, turbulent, and reacting flows, based on mass, momentum, and energy conservation laws for multiple gas species and particles. The combustion code includes turbulence, integral combustion, and particle evaporation submodels. A recently developed integral combustion submodel makes calculations more efficient and more stable while still preserving the major physical effects of the complex combustion processes. The combustor under investigation is a magnetohydrodynamic second stage combustor in which opposed jets of oxidizer are injected into a confined cross-stream of hot coal gas flow following a first stage swirl combustor. The simulation is intended to enhance the understanding the of seed particle evaporation in the combustor and evaluate the effects of combustor operating conditions on seed particle evaporation and vapor dispersion, which directly affect overall magnetohydrodynamic power generation. Computation results show that oxidizer jet angle and particle size may greatly affect particle evaporation and vapor dispersion. At a jet angle about 130 degrees, particle evaporation rate is the highest because of the highest average gas temperature. As particle size increases beyond 10 microns in diameter, the effects of particle size on wall deposition rate, evaporation delay, and downstream seed vapor dispersion become more pronounced. 16 refs., 10 figs.

Lottes, S.A.; Chang, S.L.

1992-07-01T23:59:59.000Z

37

Staged cascade fluidized bed combustor  

DOE Patents (OSTI)

A fluid bed combustor comprising a plurality of fluidized bed stages interconnected by downcomers providing controlled solids transfer from stage to stage. Each stage is formed from a number of heat transfer tubes carried by a multiapertured web which passes fluidizing air to upper stages. The combustor cross section is tapered inwardly from the middle towards the top and bottom ends. Sorbent materials, as well as non-volatile solid fuels, are added to the top stages of the combustor, and volatile solid fuels are added at an intermediate stage.

Cannon, Joseph N. (4103 Farragut St., Hyattsville, MD 20781); De Lucia, David E. (58 Beacon St., Apt. No. 2, Boston, MA 02108); Jackson, William M. (5300 McArthur Blvd., NW., Washington, DC 20016); Porter, James H. (P.O. Box 1131, Daggett Ave., Vineyard Haven, MA 02568)

1984-01-01T23:59:59.000Z

38

Concentric catalytic combustor  

DOE Patents (OSTI)

A catalytic combustor (28) includes a tubular pressure boundary element (90) having a longitudinal flow axis (e.g., 56) separating a first portion (94) of a first fluid flow (e.g., 24) from a second portion (95) of the first fluid flow. The pressure boundary element includes a wall (96) having a plurality of separate longitudinally oriented flow paths (98) annularly disposed within the wall and conducting respective portions (100, 101) of a second fluid flow (e.g., 26) therethrough. A catalytic material (32) is disposed on a surface (e.g., 102, 103) of the pressure boundary element exposed to at least one of the first and second portions of the first fluid flow.

Bruck, Gerald J. (Oviedo, FL); Laster, Walter R. (Oviedo, FL)

2009-03-24T23:59:59.000Z

39

Low emission combustor  

SciTech Connect

A low emission combustor assembly particularly suited for an automotive gas turbine engine has an inlet plenum supplied with regenerated compressor discharge, an exhaust plenum, a diffusion flame combustion chamber disposed between the inlet and exhaust plenums, and a catalytic combustion chamber also disposed between the inlet and exhaust plenums so that parallel flow paths are established between the inlet and exhaust plenums. During engine start-up, fuel is supplied only to the diffusion flame combustion chamber and regenerated compressor discharge simultaneously flowing through the catalytic combustion chamber heats the catalyst to operating temperature and cools and dilutes exhaust from the diffusion flame combustion chamber. When the catalyst reaches operating temperature fuel is directed only to the catalytic combustion chamber wherein an ultra lean air/fuel ratio mixture is catalytically oxidized, the exhaust from this reaction being cooled and diluted by regenerated compressor discharge simultaneously flowing through the diffusion flame combustion chamber.

Cornelius, W.; Klomp, E.D.; Kosek, T.P.

1984-02-28T23:59:59.000Z

40

Large Wind Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

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

42

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

43

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

44

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

45

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

46

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

47

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

48

Large electrical-energy storage facilities  

SciTech Connect

Problems associated with the utilization of various types of energy-storage facilities are considered, three areas being singled out: operation during the variable portion of the load curve with double regulation effect, handling of peaks and the filling in of off-peak dips in the load curve; the generation of power impulses through the use of stored energy for short-term supply of load; and the conversion of one form of energy to another. The present-day state of development and introduction of storage facilities of various kinds is described. The conditions for utilization of large-scale storage on the power systems of the USSR are evaluated, and the principles for determining the economic efficiency are formulated.

Ershevich, V.V.

1985-01-01T23:59:59.000Z

49

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

50

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, G.A.; Morris, G.J.; Welter, M.J.

1991-12-31T23:59:59.000Z

51

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

52

WASTE SEPARATION-DOES IT INFLUENCE MUNICIPAL WASTE COMBUSTOR EMISSIONS?  

E-Print Network (OSTI)

WASTE SEPARATION- DOES IT INFLUENCE MUNICIPAL WASTE COMBUSTOR EMISSIONS? A. John Chandler A a commendable job in proving that trace emissions from a modem waste to energy plant have little to do with the trace compounds in individual components of municipal solid waste. Ogden, the leader in designing

Columbia University

53

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

54

Strategies to Finance Large-Scale Deployment of Renewable Energy...  

Open Energy Info (EERE)

Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Jump to: navigation, search Name Strategies to Finance Large-Scale...

55

Coal desulfurization in a rotary kiln combustor  

Science Conference Proceedings (OSTI)

BCR National Laboratory (BCRNL) has initiated a project aimed at evaluating the technical and economic feasibility of using a rotary kiln, suitably modified, to burn Pennsylvania anthracite wastes, co-fired with high-sulfur bituminous coal. Limestone will be injected into the kiln for sulfur control, to determine whether high sulfur capture levels can be achieved with high sorbent utilization. The principal objectives of this work are: (1) to prove the feasibility of burning anthracite refuse, with co-firing of high-sulfur bituminous coal and with limestone injection for sulfur emissions control, in a rotary kiln fitted with a Universal Energy International (UEI) air injector system; (2) to determine the emissions levels of SO{sub x} and NO{sub x} and specifically to identify the Ca/S ratios that are required to meet New Source Performance Standards; (3) to evaluate the technical and economic merits of a commercial rotary kiln combustor in comparison to fluidized bed combustors; and, (4) to ascertain the need for further work, including additional combustion tests, prior to commercial application, and to recommend accordingly a detailed program towards this end.

Cobb, J.T. Jr.

1990-08-15T23:59:59.000Z

56

Web-based energy information systems for large commercial buildings  

E-Print Network (OSTI)

and benchmark energy use among a portfolio of buildings bybenchmark Motegi et al: Web-based Energy Information Systems For Large Commercial Buildings

Motegi, Naoya; Piette, Mary Ann

2003-01-01T23:59:59.000Z

57

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

NLE Websites -- All DOE Office Websites (Extended Search)

at NERSC HPC Requirements Reviews Requirements for Science: Target 2014 Fusion Energy Sciences (FES) Large Scale Computing and Storage Requirements for Fusion Energy...

58

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

NLE Websites -- All DOE Office Websites (Extended Search)

at NERSC HPC Requirements Reviews Requirements for Science: Target 2014 Basic Energy Sciences (BES) Large Scale Computing and Storage Requirements for Basic Energy...

59

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

60

Variable residence time vortex combustor  

DOE Patents (OSTI)

A variable residence time vortex combustor including a primary combustion chamber for containing a combustion vortex, and a plurality of louvres peripherally disposed about the primary combustion chamber and longitudinally distributed along its primary axis. The louvres are inclined to impel air about the primary combustion chamber to cool its interior surfaces and to impel air inwardly to assist in driving the combustion vortex in a first rotational direction and to feed combustion in the primary combustion chamber. The vortex combustor also includes a second combustion chamber having a secondary zone and a narrowed waist region in the primary combustion chamber interconnecting the output of the primary combustion chamber with the secondary zone for passing only lower density particles and trapping higher density particles in the combustion vortex in the primary combustion chamber for substantial combustion.

Melconian, Jerry O. (76 Beaver Rd., Reading, MA 01867)

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.


61

ATP-Funded Optics Technology Produces Large Energy ...  

Science Conference Proceedings (OSTI)

1.B.8: ATP-Funded Optics Technology Produces Large Energy Savings in Petroleum Refineries and Distribution Systems, ...

2011-10-19T23:59:59.000Z

62

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 areas 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. 2 figs.

Shang, Jer Yu; Harrington, R.E.

1987-05-01T23:59:59.000Z

63

Catalytic Combustor for Fuel-Flexible Turbine  

NLE Websites -- All DOE Office Websites (Extended Search)

Lean (RCL TM ) technology, Figure 1, is being developed as an ultra low NOx gas turbine combustor for Integrated Gasification Combined Cycle (IGCC). In this concept, ultra...

64

Catalytic Combustor for Fuel-Flexible Turbine  

NLE Websites -- All DOE Office Websites (Extended Search)

Catalytic Lean (RCL TM ) technology, Figure 1, is being developed as an ultra low NOx gas turbine combustor for Integrated Gasification Combined Cycle (IGCC). In this concept,...

65

EM Active Sites (large) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

--Alternative Fuel Vehicles --Batteries --Biofuels --Clean Cities -Building Design --Solar Decathlon -Manufacturing Energy Sources -Renewables --Solar ---SunShot --Wind...

66

Coal desulfurization in a rotary kiln combustor. Final report, March 15, 1990--July 31, 1991  

Science Conference Proceedings (OSTI)

The purpose of this project was to demonstrate the combustion of coal and coal wastes in a rotary kiln reactor with limestone addition for sulfur control. The rationale for the project was the perception that rotary systems could bring several advantages to combustion of these fuels, and may thus offer an alternative to fluid-bed boilers. Towards this end, an existing wood pyrolysis kiln (the Humphrey Charcoal kiln) was to be suitably refurbished and retrofitted with a specially designed version of a patented air distributor provided by Universal Energy, Inc. (UEI). As the project progressed beyond the initial stages, a number of issues were raised regarding the feasibility and the possible advantages of burning coals in a rotary kiln combustor and, in particular, the suitability of the Humphrey Charcoal kiln as a combustor. Instead, an opportunity arose to conduct combustion tests in the PEDCO Rotary Cascading-Bed Boiler (RCBB) commercial demonstration unit at the North American Rayon CO. (NARCO) in Elizabethton, TN. The tests focused on anthracite culm and had two objectives: (a) determine the feasibility of burning anthracite culms in a rotary kiln boiler and (b) obtain input for any further work involving the Humphrey Charcoal kiln combustor. A number of tests were conducted at the PEDCO unit. The last one was conducted on anthracite culm procured directly from the feed bin of a commercial circulating fluid-bed boiler. The results were disappointing; it was difficult to maintain sustained combustion even when large quantities of supplemental fuel were used. Combustion efficiency was poor, around 60 percent. The results suggest that the rotary kiln boiler, as designed, is ill-suited with respect to low-grade, hard to burn solid fuels, such as anthracite culm. Indeed, data from combustion of bituminous coal in the PEDCO unit suggest that with respect to coal in general, the rotary kiln boiler appears inferior to the circulating fluid bed boiler.

Cobb, J.T. Jr.

1992-09-11T23:59:59.000Z

67

Combustor oscillation pressure stabilizer  

DOE Patents (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

68

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

69

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.

1988-11-08T23:59:59.000Z

70

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

71

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

72

Energy Basics: Large-Scale Hydropower  

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

These plants are more than 30 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...

73

Energy Department Loan Guarantee Would Support Large-Scale Rooftop...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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....

74

PSNH- Large Business Energy Efficiency Retrofit Rebate Program  

Energy.gov (U.S. Department of Energy (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...

75

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

NLE Websites -- All DOE Office Websites (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...

76

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

77

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

78

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

79

Web-based Energy Information Systems for Large Commercial Buildings  

NLE Websites -- All DOE Office Websites (Extended Search)

Web-based Energy Information Systems for Large Commercial Buildings Speaker(s): Naoya Motegi Date: May 2, 2002 - 12:00pm Location: Bldg. 90 Energy Information Systems (EIS), which...

80

Large Industrial Renewable Energy Purchase Program (New Brunswick) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

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

OH-Planar Fluorescence Measurements of Pressurized, Hydrogen Premixed Flames in the SimVal Combustor  

DOE Green Energy (OSTI)

Planar laser-induced fluorescence measurements of the hydroxyl radical in lean, premixed natural gas flames augmented with hydrogen are presented. The experiments were conducted in the Simulation Validation combustor at the National Energy Technology Laboratory at operating pressures from 1 to 8 atmospheres. The data, which were collected in a combustor with well-controlled boundary conditions, are intended to be used for validating computational fluid dynamics 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 nondimensional parameters such as Karlovitz number. Pressure was found to thin the OH region, but only had a secondary effect on overall flame shape compared with 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 are presented and compared with 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)

2008-07-01T23:59:59.000Z

82

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

83

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

84

Investigation and demonstration of a rich combustor cold-start device for alcohol-fueled engines  

DOE Green Energy (OSTI)

The authors have completed a study in which they investigated the use of a rich combustor to aid in cold starting spark-ignition engines fueled with either neat ethanol or neat methanol. The rich combustor burns the alcohol fuel outside the engine under fuel-rich conditions to produce a combustible product stream that is fed to the engine for cold starting. The rich combustor approach significantly extends the cold starting capability of alcohol-fueled engines. A design tool was developed that simulates the operation of the combustor and couples it to an engine/vehicle model. This tool allows the user to determine the fuel requirements of the rich combustor as the vehicle executes a given driving mission. The design tool was used to design and fabricate a rich combustor for use on a 2.8 L automotive engine. The system was tested using a unique cold room that allows the engine to be coupled to an electric dynamometer. The engine was fitted with an aftermarket engine control system that permitted the fuel flow to the rich combustor to be programmed as a function of engine speed and intake manifold pressure. Testing indicated that reliable cold starts were achieved on both neat methanol and neat ethanol at temperatures as low as {minus}20 C. Although starts were experienced at temperatures as low as {minus}30 C, these were erratic. They believe that an important factor at the very low temperatures is the balance between the high mechanical friction of the engine and the low energy density of the combustible mixture fed to the engine from the rich combustor.

Hodgson, J.W.; Irick, D.K. [Univ. of Tennessee, Knoxville, TN (United States)

1998-04-01T23:59:59.000Z

85

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

86

U. S. energy issues largely on hold on Capitol Hill  

Science Conference Proceedings (OSTI)

The U.S. energy agenda for 1992 consists mainly of one bill in Congress, and it may be too large for Congress to swallow. This paper reports that inspired by the Bush administration's program to revamp U.S. energy policy, congressional committees last year dumped all their energy legislation into single packages. Now those omnibus bills are in jeopardy. The Senate bill was derailed, largely over the issue of leasing the Arctic National Wildlife Refuge (ANWR) Coastal Plain. A House energy subcommittee has drafted an energy package, but the full energy and commerce committees will defer action until the Senate passes a bill.

Crow, P.

1991-12-30T23:59:59.000Z

87

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

88

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. 7 figs.

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

1998-08-11T23:59:59.000Z

89

The Energy Asymptotics of Large Coulomb Systems  

E-Print Network (OSTI)

formal power series expansion in jjpjj \\Gamma1 ; then, we combine both A(y) and y(x) to understand M = 1, this system is an atom. In this case we can assume y = 0 and we denote its energy simply by E atom (Z). #12; 2 C. L. Fefferman, V. Ja. Ivrii, L. A. Seco, I. M. Sigal It is a remarkable fact that E

Seco, Luis A.

90

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

91

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

92

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

93

Combustor assembly in a gas turbine engine  

Science Conference Proceedings (OSTI)

A combustor assembly in a gas turbine engine. The combustor assembly includes a combustor device coupled to a main engine casing, a first fuel injection system, a transition duct, and an intermediate duct. The combustor device includes a flow sleeve for receiving pressurized air and a liner disposed radially inwardly from the flow sleeve. The first fuel injection system provides fuel that is ignited with the pressurized air creating first working gases. The intermediate duct is disposed between the liner and the transition duct and defines a path for the first working gases to flow from the liner to the transition duct. An intermediate duct inlet portion is associated with a liner outlet and allows movement between the intermediate duct and the liner. An intermediate duct outlet portion is associated with a transition duct inlet section and allows movement between the intermediate duct and the transition duct.

Wiebe, David J; Fox, Timothy A

2013-02-19T23:59:59.000Z

94

Large Hospital 50% Energy Savings: Technical Support Document  

SciTech Connect

This Technical Support Document documents the technical analysis and design guidance for large hospitals to achieve whole-building energy savings of at least 50% over ANSI/ASHRAE/IESNA Standard 90.1-2004 and represents a step toward determining how to provide design guidance for aggressive energy savings targets. This report documents the modeling methods used to demonstrate that the design recommendations meet or exceed the 50% goal. EnergyPlus was used to model the predicted energy performance of the baseline and low-energy buildings to verify that 50% energy savings are achievable. Percent energy savings are based on a nominal minimally code-compliant building and whole-building, net site energy use intensity. The report defines architectural-program characteristics for typical large hospitals, thereby defining a prototype model; creates baseline energy models for each climate zone that are elaborations of the prototype models and are minimally compliant with Standard 90.1-2004; creates a list of energy design measures that can be applied to the prototype model to create low-energy models; uses industry feedback to strengthen inputs for baseline energy models and energy design measures; and simulates low-energy models for each climate zone to show that when the energy design measures are applied to the prototype model, 50% energy savings (or more) are achieved.

Bonnema, E.; Studer, D.; Parker, A.; Pless, S.; Torcellini, P.

2010-09-01T23:59:59.000Z

95

National Grid (Electric) - Large Commercial Energy Efficiency Incentive  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

96

Energy Conservation of Air Conditioning Systems in Large Public Buildings  

E-Print Network (OSTI)

Analyzing the actuality of the large-scale public buildings' energy consumption, we know that most of them run not only in low efficiency, but also in high energy consumption. According to the characteristics of the building, we should proceed with the heating characteristics of the exterior -protected construction, the set value of the temperature of the air-conditioning, the lectotype of the Central air-conditioning system, the regulation and the modification of the transmission and distribution system, the use of the new energy and the daily management or the method of adjustment and control, and so on , so we can make the air-conditioning system run efficiently. Analyzing and comparing the large-scale public buildings' energy consumption with each other, some pointed improvement measures are proposed further. According to the study and analysis, even though large-scale public buildings consume a great of energy, there exists a huge potential for energy conservation.

Liu, P.; Li, D.

2006-01-01T23:59:59.000Z

97

Energy Characteristics and Energy Consumed in Large Hospital ...  

U.S. Energy Information Administration (EIA)

Energy management and conservation reported in high percentages. ... nearly all had regular maintenance and scheduled repair for the HVAC system.

98

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

99

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

100

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

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

Glendale Water and Power - Large Business Energy Efficiency Program...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

its medium and large business customers with electric bills of more than 3000 per month (electric usage of 250,000 kWh annually 36,000 per year) to encourage energy efficiency...

102

Large-Scale Renewable Energy Development on Public Lands  

NLE Websites -- All DOE Office Websites (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

103

Large-Scale Renewable Energy Development on Public Lands  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

104

Large Hospital 50% Energy Savings: Technical Support Document  

NLE Websites -- All DOE Office Websites (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.

105

Large-Scale Eucalyptus Energy Farms and Power Cogeneration1  

E-Print Network (OSTI)

Large-Scale Eucalyptus Energy Farms and Power Cogeneration1 Robert C. Noronla2 The initiation of a large-scale cogeneration project, especially one that combines construction of the power generation supplemental fuel source must be sought if the cogeneration facility will consume more fuel than

Standiford, Richard B.

106

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"

107

SunShot Initiative: CSP Tower Air Brayton Combustor  

NLE Websites -- All DOE Office Websites (Extended Search)

CSP Tower Air Brayton Combustor to someone by E-mail Share SunShot Initiative: CSP Tower Air Brayton Combustor on Facebook Tweet about SunShot Initiative: CSP Tower Air Brayton...

108

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

109

Micro-combustor for gas turbine engine  

SciTech Connect

An improved gas turbine combustor (20) including a basket (26) and a multiplicity of micro openings (29) arrayed across an inlet wall (27) for passage of a fuel/air mixture for ignition within the combustor. The openings preferably have a diameter on the order of the quenching diameter; i.e. the port diameter for which the flame is self-extinguishing, which is a function of the fuel mixture, temperature and pressure. The basket may have a curved rectangular shape that approximates the shape of the curved rectangular shape of the intake manifolds of the turbine.

Martin, Scott M. (Oviedo, FL)

2010-11-30T23:59:59.000Z

110

Large energy-spread beam diagnostics through quadrupole scans  

Science Conference Proceedings (OSTI)

The Facility for Advanced Accelerator and Experimental Tests (FACET) is a new user facility at the SLAC National Accelerator Laboratory, servicing next-generation accelerator experiments. The 1.5% RMS energy spread of the FACET beam causes large chromatic aberrations in optics. These aberrations necessitate updated quadrupole scan fits to remain accurate.

Frederico, Joel; Adli, Erik; Hogan, Mark; Raubenheimer, Tor [SLAC National Accelerator Laboratory (United States)

2012-12-21T23:59:59.000Z

111

Design and Performance of a Low Btu Fuel Rich-Quench-Lean Gas Turbine Combustor  

SciTech Connect

General Electric Company is developing gas turbines and a high temperature desulfurization system for use in integrated gasification combined cycle (IGCC) power plants. High temperature desulfurization, or hot gas cleanup (HGCU), offers many advantages over conventional low temperature desulfurization processes, but does not reduce the relatively high concentrations of fuel bound nitrogen (FBN) that are typically found in low Btu fuel. When fuels containing bound nitrogen are burned in conventional gas turbine combustors, a significant portion of the FBN is converted to NO{sub x}. Methods of reducing the NO{sub x} emissions from IGCC power plants equipped with HGCU are needed. Rich-quench-lean (RQL) combustion can decrease the conversion of FBN to NO{sub x} because a large fraction of the FBN is converted into non-reactive N{sub 2} in a fuel rich stage. Additional air, required for complete combustion, is added in a quench stage. A lean stage provides sufficient residence time for complete combustion. Objectives General Electric has developed and tested a rich-quench-lean gas turbine combustor for use with low Btu fuels containing FBN. The objective of this work has been to design an RQL combustor that has a lower conversion of FBN to N{sub x} than a conventional low Btu combustor and is suitable for use in a GE heavy duty gas turbine. Such a combustor must be of appropriate size and scale, configuration (can-annular), and capable of reaching ``F`` class firing conditions (combustor exit temperature = 2550{degrees}F).

Feitelberg, A.S.; Jackson, M.R.; Lacey, M.A.; Manning, K.S.; Ritter, A.M.

1996-12-31T23:59:59.000Z

112

Combustor for a low-emissions gas turbine engine  

DOE Patents (OSTI)

Many government entities regulated emission from gas turbine engines including CO. CO production is generally reduced when CO reacts with excess oxygen at elevated temperatures to form CO2. Many manufactures use film cooling of a combustor liner adjacent to a combustion zone to increase durability of the combustion liner. Film cooling quenches reactions of CO with excess oxygen to form CO2. Cooling the combustor liner on a cold side (backside) away from the combustion zone reduces quenching. Furthermore, placing a plurality of concavities on the cold side enhances the cooling of the combustor liner. Concavities result in very little pressure reduction such that air used to cool the combustor liner may also be used in the combustion zone. An expandable combustor housing maintains a predetermined distance between the combustor housing and combustor liner.

Glezer, Boris (Del Mar, CA); Greenwood, Stuart A. (San Diego, CA); Dutta, Partha (San Diego, CA); Moon, Hee-Koo (San Diego, CA)

2000-01-01T23:59:59.000Z

113

Stably operating pulse combustor and method  

DOE Patents (OSTI)

A pulse combustor apparatus is described which is adapted to burn either a liquid fuel or a pulverized solid fuel within a preselected volume of the combustion chamber. The combustion process is substantially restricted to an optimum combustion zone in order to attain effective pulse combustion operation. 4 figs.

Zinn, B.T.; Reiner, D.

1990-05-29T23:59:59.000Z

114

Stably operating pulse combustor and method  

DOE Patents (OSTI)

A pulse combustor apparatus adapted to burn either a liquid fuel or a pulverized solid fuel within a preselected volume of the combustion chamber. The combustion process is substantially restricted to an optimum combustion zone in order to attain effective pulse combustion operation.

Zinn, Ben T. (Atlanta, GA); Reiner, David (Haifa, IL)

1990-01-01T23:59:59.000Z

115

Thermal Imaging Control of Furnaces and Combustors  

Science Conference Proceedings (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

116

First Beam for Large Hadron Collider | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

117

Ignition methods and apparatus using microwave energy  

SciTech Connect

An ignition apparatus for a combustor includes a microwave energy source that emits microwave energy into the combustor at a frequency within a resonant response of the combustor, the combustor functioning as a resonant cavity for the microwave energy so that a plasma is produced that ignites a combustible mixture therein. The plasma preferably is a non-contact plasma produced in free space within the resonant cavity spaced away from with the cavity wall structure and spaced from the microwave emitter.

DeFreitas, Dennis Michael (Oxford, NY); Migliori, Albert (Santa Fe, NM)

1997-01-01T23:59:59.000Z

118

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

119

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.

120

A New Technique for Troubleshooting Large Capacitive Energy Storage Banks  

DOE Green Energy (OSTI)

The Power Conditioning System (PCS) of the National Ignition Facility (NIF) like many pulse power systems relies on large numbers of inductively isolated high voltage capacitors configured in parallel for energy storage. When an energy storage capacitor fails in such a capacitor bank, there is often little or no external indication showing which capacitor failed. Identifying the failed component can be a time consuming and potentially hazardous operation. Conventional methods using capacitance meters require that each capacitor be disconnected and tested independently. They have developed a new non-invasive technique (i.e. no dismantling of the bank is required) that greatly improves personnel safety as well reducing troubleshooting time.

Fulkerson, S E; Hammon, J

2001-06-05T23:59:59.000Z

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

Commercialization analysis of large wind energy conversion systems. Final report  

DOE Green Energy (OSTI)

The framework is described that can be used to evaluate potential new federal incentives to facilitate the market acceptance of utility-scale wind energy conversion systems. The insights gained from utilizing this framework to evaluate a variety of hypothetical federal incentives are discussed. The heart of the evaluation framework is an explicit representation of the decisions made by utility purchasers, suppliers, and government agencies with respect to the utilization and fabrication of large wind energy conversion systems. The demand-side and supply-side aspects of the multiparty commercialization model are described, and the model's struture is explained. (LEW)

Boyd, D.W.; Buckley, O.E.; Haas, S.M.

1980-06-01T23:59:59.000Z

122

NYU-DOE Pressurized Fluidized Bed Combustor Facility  

Science Conference Proceedings (OSTI)

New York University (NYU), under a Department of Energy (DOE) Contract, has designed and constructed a sub-pilot scale Pressurized Fluidized-Bed Combustor (PFBC) Facility at the Antonio Ferri Laboratories, Westbury, Long Island. The basic feature of this Experimental Research Facility is a well-instrumented, 30-inch diameter coal combustor capable of operating up to 10 atm and provided with a liberal number of ports, making it a versatile unit for study of fundamental in-bed phenomena. Additionally, the overall design features make it a flexible facility for solving a variety of industrial research problems. The main objectives of the facility are two-fold: (1) to perform research in important areas of Pressurized Fluidized-Bed Combustion like low-grade fuel combustion under pressure; and (2) to provide the PFBC community with a experimental research tool for basic and applied research in order to accelerate the commercialization of this technology. New York University will initially test the facility of burning low-grade fuels under pressure. During the test program, emphasis will be placed on burning North Dakota lignite under pressures up to 7 atm. The performance of lignite with regard to its feeding, combustion efficiency, sulfur adsorption and sorbent requirements will be investigated. This report describes the various systems of the PFBC facility and operating procedures, and presents an outline of the test program planned for the facility. Other details are provided in the Equipment and Maintenance Manual, Test Program and Data Acquisition Manual, and Training Manual.

Zakkay, V.; Kolar, A.; Sellakumar, K.; Srinivasaragavan, S.; Miller, G.; Panunzio, S.; Joseph, A.; Sundaresan, C.

1983-01-01T23:59:59.000Z

123

High energy physics - The large and the small  

Science Conference Proceedings (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

124

Building Energy Software Tools Directory: ID-Spec Large  

NLE Websites -- All DOE Office Websites (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

125

Principal considerations in large energy-storage capacitor banks  

SciTech Connect

Capacitor banks storing one or more megajoules and costing more than one million dollars have unique problems not often found in smaller systems. Two large banks, Scyllac at Los Alamos and Shiva at Livermore, are used as models of large, complex systems. Scyllac is a 10-MJ, 60-kV theta-pinch system while Shiva is a 20-MJ, 20-kV energy system for laser flash lamps. A number of design principles are emphasized for expediting the design and construction of large banks. The sensitive features of the charge system, the storage system layout, the switching system, the transmission system, and the design of the principal bank components are presented. Project management and planning must involve a PERT chart with certain common features for all the activities. The importance of the budget is emphasized.

Kemp, E.L.

1976-01-01T23:59:59.000Z

126

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

127

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

128

Rapid-quench axially staged combustor  

DOE Patents (OSTI)

A combustor cooperating with a compressor in driving a gas turbine includes a cylindrical outer combustor casing. A combustion liner, having an upstream rich section, a quench section and a downstream lean section, is disposed within the outer combustor casing defining a combustion chamber having at least a core quench region and an outer quench region. A first plurality of quench holes are disposed within the liner at the quench section having a first diameter to provide cooling jet penetration to the core region of the quench section of the combustion chamber. A second plurality of quench holes are disposed within the liner at the quench section having a second diameter to provide cooling jet penetration to the outer region of the quench section of the combustion chamber. In an alternative embodiment, the combustion chamber quench section further includes at least one middle region and at least a third plurality of quench holes disposed within the liner at the quench section having a third diameter to provide cooling jet penetration to at least one middle region of the quench section of the combustion chamber.

Feitelberg, Alan S. (Niskayuna, NY); Schmidt, Mark Christopher (Niskayuna, NY); Goebel, Steven George (Clifton Park, NY)

1999-01-01T23:59:59.000Z

129

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network (OSTI)

strategic plans. Large  Scale  Computing  and  Storage  Requirements  for  Fusion  Energy  Sciences   DOE  

Gerber, Richard

2012-01-01T23:59:59.000Z

130

Energy storage technology-environmental implications of large scale utilization  

SciTech Connect

Environmental impacts for several energy storage technologies have been identified. State-of-the-art control technology options were similarly identified. Recommendations for research and development on new control technology were made where present controls were either deemed inadequate or non-existent. Specifically, the energy storage technologies under study included: advanced lead-acid battery, compressed air, underground pumped hydroelectric, flywheel, superconducting magnet and various thermal systems (sensible, latent heat and reversible chemical reaction). In addition, a preliminary study was conducted on fuel cell technology. Although not strictly classified as an energy storage system, fuel cells in conjunction with product recycling units can serve an energy storage function. A very large number of potential environmental impacts can be identified for all of these technologies. However, not all are of primary importance. Detailed discussions of a number of environmental impacts from the latest LASL study as they relate to primarily operational situations are emphasized. In addition, a brief discussion on new application for energy storage technologies and the additional costs of controls to be used for mitigation of specific impacts are also presented.

Krupka, M.C.; Moore, J.E.; Keller, W.E.; Baca, G.A.; Brasier, R.I.; Bennett, W.S.

1979-01-01T23:59:59.000Z

131

Large energy absorption in Ni-Mn-Ga/polymer composites  

SciTech Connect

Ferromagnetic shape memory alloys can respond to a magnetic field or applied stress by the motion of twin boundaries and hence they show large hysteresis or energy loss. Ni-Mn-Ga particles made by spark erosion have been dispersed and oriented in a polymer matrix to form pseudo 3:1 composites which are studied under applied stress. Loss ratios have been determined from the stress-strain data. The loss ratios of the composites range from 63% to 67% compared to only about 17% for the pure, unfilled polymer samples.

Feuchtwanger, Jorge; Richard, Marc L.; Tang, Yun J.; Berkowitz, Ami E.; O'Handley, Robert C.; Allen, Samuel M. [Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); University of California, San Diego, La Joya, California 92093 (United States); Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2005-05-15T23:59:59.000Z

132

Thermalization in collisions of large nuclei at high energies  

E-Print Network (OSTI)

Hydrodynamical analysis of experimental data of ultrarelativistic heavy ion collisions seems to indicate that the hot QCD matter created in the collisions thermalizes very quickly. Theoretically, we have no idea why this should be true. In this proceeding, I will describe how the thermalization takes place in the most theoretically clean limit -- that of large nuclei at asymptotically high energy per nucleon, where the system is described by weak-coupling QCD. In this limit, plasma instabilities dominate the dynamics from immediately after the collision until well after the plasma becomes nearly in equilibrium at time t \\alpha^(-5/2)Q^(-1).

Kurkela, Aleksi

2013-01-01T23:59:59.000Z

133

Combustor nozzle for a fuel-flexible combustion system  

DOE Patents (OSTI)

A combustor nozzle is provided. The combustor nozzle includes a first fuel system configured to introduce a syngas fuel into a combustion chamber to enable lean premixed combustion within the combustion chamber and a second fuel system configured to introduce the syngas fuel, or a hydrocarbon fuel, or diluents, or combinations thereof into the combustion chamber to enable diffusion combustion within the combustion chamber.

Haynes, Joel Meier (Niskayuna, NY); Mosbacher, David Matthew (Cohoes, NY); Janssen, Jonathan Sebastian (Troy, NY); Iyer, Venkatraman Ananthakrishnan (Mason, OH)

2011-03-22T23:59:59.000Z

134

Serial cooling of a combustor for a gas turbine engine  

DOE Patents (OSTI)

A combustor for a gas turbine engine uses compressed air to cool a combustor liner and uses at least a portion of the same compressed air for combustion air. A flow diverting mechanism regulates compressed air flow entering a combustion air plenum feeding combustion air to a plurality of fuel nozzles. The flow diverting mechanism adjusts combustion air according to engine loading.

Abreu, Mario E. (Poway, CA); Kielczyk, Janusz J. (Escondido, CA)

2001-01-01T23:59:59.000Z

135

Technical Support Document: Development of the Advanced Energy Design Guide for Large Hospitals - 50% Energy Savings  

SciTech Connect

This Technical Support Document describes the process and methodology for the development of the Advanced Energy Design Guide for Large Hospitals: Achieving 50% Energy Savings Toward a Net Zero Energy Building (AEDG-LH) ASHRAE et al. (2011b). The AEDG-LH is intended to provide recommendations for achieving 50% whole-building energy savings in large hospitals over levels achieved by following Standard 90.1-2004. The AEDG-LH was created for a 'standard' mid- to large-size hospital, typically at least 100,000 ft2, but the strategies apply to all sizes and classifications of new construction hospital buildings. Its primary focus is new construction, but recommendations may be applicable to facilities undergoing total renovation, and in part to many other hospital renovation, addition, remodeling, and modernization projects (including changes to one or more systems in existing buildings).

Bonnema, E.; Leach, M.; Pless, S.

2013-06-01T23:59:59.000Z

136

COMPUTATIONAL FLUID DYNAMICS MODELING ANALYSIS OF COMBUSTORS  

DOE Green Energy (OSTI)

In the current fiscal year FY01, several CFD simulations were conducted to investigate the effects of moisture in biomass/coal, particle injection locations, and flow parameters on carbon burnout and NO{sub x} inside a 150 MW GEEZER industrial boiler. Various simulations were designed to predict the suitability of biomass cofiring in coal combustors, and to explore the possibility of using biomass as a reburning fuel to reduce NO{sub x}. Some additional CFD simulations were also conducted on CERF combustor to examine the combustion characteristics of pulverized coal in enriched O{sub 2}/CO{sub 2} environments. Most of the CFD models available in the literature treat particles to be point masses with uniform temperature inside the particles. This isothermal condition may not be suitable for larger biomass particles. To this end, a stand alone program was developed from the first principles to account for heat conduction from the surface of the particle to its center. It is envisaged that the recently developed non-isothermal stand alone module will be integrated with the Fluent solver during next fiscal year to accurately predict the carbon burnout from larger biomass particles. Anisotropy in heat transfer in radial and axial will be explored using different conductivities in radial and axial directions. The above models will be validated/tested on various fullscale industrial boilers. The current NO{sub x} modules will be modified to account for local CH, CH{sub 2}, and CH{sub 3} radicals chemistry, currently it is based on global chemistry. It may also be worth exploring the effect of enriched O{sub 2}/CO{sub 2} environment on carbon burnout and NO{sub x} concentration. The research objective of this study is to develop a 3-Dimensional Combustor Model for Biomass Co-firing and reburning applications using the Fluent Computational Fluid Dynamics Code.

Mathur, M.P.; Freeman, Mark (U.S. DOE National Energy Technology Laboratory); Gera, Dinesh (Fluent, Inc.)

2001-11-06T23:59:59.000Z

137

OXY-fuel Combustion at the CANMET Vertical Combustor Research Faciltiy  

NLE Websites -- All DOE Office Websites (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

138

Enabling Advanced Modeling and Simulations for Fuel-Flexible Combustors  

Science Conference Proceedings (OSTI)

The overall goal of the present project is to enable advanced modeling and simulations for the design and optimization of fuel-flexible turbine combustors. For this purpose we use a high-fidelity, extensively-tested large-eddy simulation (LES) code and state-of-the-art models for premixed/partially-premixed turbulent combustion developed in the PI's group. In the frame of the present project, these techniques are applied, assessed, and improved for hydrogen enriched premixed and partially premixed gas-turbine combustion. Our innovative approaches include a completely consistent description of flame propagation, a coupled progress variable/level set method to resolve the detailed flame structure, and incorporation of thermal-diffusion (non-unity Lewis number) effects. In addition, we have developed a general flamelet-type transformation holding in the limits of both non-premixed and premixed burning. As a result, a model for partially premixed combustion has been derived. The coupled progress variable/level method and the general flamelet tranformation were validated by LES of a lean-premixed low-swirl burner that has been studied experimentally at Lawrence Berkeley National Laboratory. The model is extended to include the non-unity Lewis number effects, which play a critical role in fuel-flexible combustor with high hydrogen content fuel. More specifically, a two-scalar model for lean hydrogen and hydrogen-enriched combustion is developed and validated against experimental and direct numerical simulation (DNS) data. Results are presented to emphasize the importance of non-unity Lewis number effects in the lean-premixed low-swirl burner of interest in this project. The proposed model gives improved results, which shows that the inclusion of the non-unity Lewis number effects is essential for accurate prediction of the lean-premixed low-swirl flame.

Heinz Pitsch

2010-05-31T23:59:59.000Z

139

Radial inlet guide vanes for a combustor  

DOE Patents (OSTI)

A combustor may include an interior flow path therethrough, a number of fuel nozzles in communication with the interior flow path, and an inlet guide vane system positioned about the interior flow path to create a swirled flow therein. The inlet guide vane system may include a number of windows positioned circumferentially around the fuel nozzles. The inlet guide vane system may also include a number of inlet guide vanes positioned circumferentially around the fuel nozzles and adjacent to the windows to create a swirled flow within the interior flow path.

Zuo, Baifang; Simons, Derrick; York, William; Ziminsky, Willy S

2013-02-12T23:59:59.000Z

140

NIChE Workshop on Materials for Large-Scale Energy ...  

Science Conference Proceedings (OSTI)

... Workshop on Materials for Large-Scale Energy Storage. Purpose: This workshop will delve into the end-use applications and market drivers for large ...

2010-10-05T23:59:59.000Z

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.


141

Numerical investigation of recirculation in the UTSI MHD combustor  

DOE Green Energy (OSTI)

Numerical studies were carried out to investigate the gross structure of flow in cylindrical combustors. The combustor configurations studied are variations of a working design used at the University of Tennessee Space Institute to burn pulverized coal at temperatures in excess of 3000K for generation of a plasma feeding a magnetohydrodynamic channel. The numerical studies were conducted for an isothermal fluid; the main objective of the calculations was to study the effect of the oxidant injection pattern on the gross structure of recirculating flows within the combustor. The calculations illustrate the basic features of the flow in combustors of this type and suggest implications for the injection of coal and oxidizer in this type of combustor.

Schulz, R.J.; Lee, J.J.; Giel, T.V. Jr.

1983-09-01T23:59:59.000Z

142

Preliminary gas turbine combustor design using a network approach  

SciTech Connect

The preliminary design process of a gas turbine combustor often involves the use of cumbersome, geometry restrictive semi-empirical models. The objective of this analysis is the development of a versatile design tool for gas turbine combustors, able to model all conceivable combustor types. A network approach is developed that divides the flow into a number of independent semi-empirical subflows. A pressure-correction methodology solves the continuity equation and a pressure-drop/flow rate relationship. The development of a full conjugate heat transfer model allows the calculation of flame tube heat loss in the presence of cooling films, annulus heat addition, and flame tube feature heat pick-up. A constrained equilibrium calculation, incorporating mixing and recirculation models, simulates combustion processes. Comparison of airflow results to a well-validated combustor design code showed close agreement. The versatility of the network solver is illustrated with comparisons to experimental data from a reverse flow combustor.

Stuttaford, P.J.; Rubini, P.A. [Cranfield Univ. (United Kingdom). School of Mechanical Engineering

1997-07-01T23:59:59.000Z

143

Department of Energy assessment of the Large Hadron Collider  

SciTech Connect

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.

1996-06-01T23:59:59.000Z

144

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network (OSTI)

Computing and Storage Requirements for High Energy Physics [for High Energy Physics Computational  and  Storage  for High Energy Physics Computational  and  Storage  

Gerber, Richard A.

2011-01-01T23:59:59.000Z

145

Tax Exemption for Large-Scale Renewable Energy Projects | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for Energy Independence Act'' (IEIA) to promote the development of renewable energy and alternative fuel facilities, energy efficient buildings, alternative fuel vehicles,...

146

DOE/EIA-0304 Survey of Large Combustors:  

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

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...

147

Near-zero emissions combustor system for syngas and biofuels  

SciTech Connect

A multi-institutional plasma combustion team was awarded a research project from the DOE/NNSA GIPP (Global Initiative for Prolifereation Prevention) office. The Institute of High Current Electronics (Tomsk, Russia); Leonardo Technologies, Inc. (an American-based industrial partner), in conjunction with the Los Alamos National Laboratory are participating in the project to develop novel plasma assisted combustion technologies. The purpose of this project is to develop prototypes of marketable systems for more stable and cleaner combustion of syngas/biofuels and to demonstrate that this technology can be used for a variety of combustion applications - with a major focus on contemporary gas turbines. In this paper, an overview of the project, along with descriptions of the plasma-based combustors and associated power supplies will be presented. Worldwide, it is recognized that a variety of combustion fuels will be required to meet the needs for supplying gas-turbine engines (electricity generation, propulsion), internal combustion engines (propulsion, transportation), and burners (heat and electricity generation) in the 21st Century. Biofuels and biofuel blends have already been applied to these needs, but experience difficulties in modifications to combustion processes and combustor design and the need for flame stabilization techniques to address current and future environmental and energy-efficiency challenges. In addition, municipal solid waste (MSW) has shown promise as a feedstock for heat and/or electricity-generating plants. However, current combustion techniques that use such fuels have problems with achieving environmentally-acceptable air/exhaust emissions and can also benefit from increased combustion efficiency. This project involves a novel technology (a form of plasma-assisted combustion) that can address the above issues. Plasma-assisted combustion (PAC) is a growing field that is receiving worldwide attention at present. The project is focused on research necessary to develop a novel, high-efficiency, low-emissions (near-zero, or as low as reasonably achievable), advanced combustion technology for electricity and heat production from biofuels and fuels derived from MSW. For any type of combustion technology, including the advanced technology of this project, two problems of special interest must be addressed: developing and optimizing the combustion chambers and the systems for igniting and sustaining the fuel-burning process. For MSW in particular, there are new challenges over gaseous or liquid fuels because solid fuels must be ground into fine particulates ({approx} 10 {micro}m diameter), fed into the advanced combustor, and combusted under plasma-assisted conditions that are quite different than gaseous or liquid fuels. The principal idea of the combustion chamber design is to use so-called reverse vortex gas flow, which allows efficient cooling of the chamber wall and flame stabilization in the central area of the combustor (Tornado chamber). Considerable progress has been made in design ing an advanced, reverse vortex flow combustion chamber for biofuels, although it was not tested on biofuels and a system that could be fully commercialized has never been completed.

Yongho, Kim [Los Alamos National Laboratory; Rosocha, Louis [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

148

Balancing Peer and Server Energy Consumption in Large Peer-to-Peer File Distribution Systems  

E-Print Network (OSTI)

Balancing Peer and Server Energy Consumption in Large Peer-to-Peer File Distribution Systems. This paper investigates the most energy efficient way to distribute a file to a large number of recipients] has been paid to its energy consumption. This paper considers large scale file distribution

Andrew, Lachlan

149

Large Scale Computing and Storage Requirements for High Energy Physics  

Science Conference Proceedings (OSTI)

The National Energy Research Scientific Computing Center (NERSC) is the leading scientific computing facility for the Department of Energy's Office of Science, providing high-performance computing (HPC) resources to more than 3,000 researchers working on about 400 projects. NERSC provides large-scale computing resources and, crucially, the support and expertise needed for scientists to make effective use of them. In November 2009, NERSC, DOE's Office of Advanced Scientific Computing Research (ASCR), and DOE's Office of High Energy Physics (HEP) held a workshop to characterize the HPC resources needed at NERSC to support HEP research through the next three to five years. The effort is part of NERSC's legacy of anticipating users needs and deploying resources to meet those demands. The workshop revealed several key points, in addition to achieving its goal of collecting and characterizing computing requirements. The chief findings: (1) Science teams need access to a significant increase in computational resources to meet their research goals; (2) Research teams need to be able to read, write, transfer, store online, archive, analyze, and share huge volumes of data; (3) Science teams need guidance and support to implement their codes on future architectures; and (4) Projects need predictable, rapid turnaround of their computational jobs to meet mission-critical time constraints. This report expands upon these key points and includes others. It also presents a number of case studies as representative of the research conducted within HEP. Workshop participants were asked to codify their requirements in this case study format, summarizing their science goals, methods of solution, current and three-to-five year computing requirements, and software and support needs. Participants were also asked to describe their strategy for computing in the highly parallel, multi-core environment that is expected to dominate HPC architectures over the next few years. The report includes a section that describes efforts already underway or planned at NERSC that address requirements collected at the workshop. NERSC has many initiatives in progress that address key workshop findings and are aligned with NERSC's strategic plans.

Gerber, Richard A.; Wasserman, Harvey

2010-11-24T23:59:59.000Z

150

Mesoscale and Large-Eddy Simulations for Wind Energy  

Science Conference Proceedings (OSTI)

Operational wind power forecasting, turbine micrositing, and turbine design require high-resolution simulations of atmospheric flow over complex terrain. The use of both Reynolds-Averaged Navier Stokes (RANS) and large-eddy (LES) simulations is explored for wind energy applications using the Weather Research and Forecasting (WRF) model. To adequately resolve terrain and turbulence in the atmospheric boundary layer, grid nesting is used to refine the grid from mesoscale to finer scales. This paper examines the performance of the grid nesting configuration, turbulence closures, and resolution (up to as fine as 100 m horizontal spacing) for simulations of synoptically and locally driven wind ramping events at a West Coast North American wind farm. Interestingly, little improvement is found when using higher resolution simulations or better resolved turbulence closures in comparison to observation data available for this particular site. This is true for week-long simulations as well, where finer resolution runs show only small changes in the distribution of wind speeds or turbulence intensities. It appears that the relatively simple topography of this site is adequately resolved by all model grids (even as coarse as 2.7 km) so that all resolutions are able to model the physics at similar accuracy. The accuracy of the results is shown in this paper to be more dependent on the parameterization of the land-surface characteristics such as soil moisture rather than on grid resolution.

Marjanovic, N

2011-02-22T23:59:59.000Z

151

Focus on Energy - Large Renewable Grant Program (WPS Customers...  

Open Energy Info (EERE)

Hydroelectric Active Incentive No Implementing Sector Utility Energy Category Renewable Energy Incentive Programs Amount Solar Electric: 1 for residential and business; 1.50 for...

152

Impact of Large Scale Energy Efficiency Programs On Consumer...  

NLE Websites -- All DOE Office Websites (Extended Search)

Date Published 012011 Keywords consumer tarifs, energy efficiency, india, modeling energy futures, models, utility finances Abstract The objective of this paper is to analyze...

153

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network (OSTI)

Director Editors Richard Gerber Harvey Wasserman NERSC UserServices Group NERSC User Services Group Large ScaleNERSC

Gerber, Richard A.

2011-01-01T23:59:59.000Z

154

Large Scale Computing and Storage Requirements for High Energy Physics  

NLE Websites -- All DOE Office Websites (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

155

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

156

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 are analyzed, and the evaluation indices of each kind of key equipment and the whole heating and air-conditioning system are put forward from the point of view of usage efficiency of energy. The energy consumption evaluation index system for large public buildings is primarily established. The calculation method of each kind of energy consumption evaluation index is given, which provides the foundation for further studies on energy consumption for large public buildings.

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

2006-01-01T23:59:59.000Z

157

Simplified jet-A kinetic mechanism for combustor application  

SciTech Connect

Successful modeling of combustion and emissions in gas turbine engine combustors requires an adequate description of the reaction mechanism. For hydrocarbon oxidation, detailed mechanisms are only available for the simplest types of hydrocarbons such as methane, ethane, acetylene, and propane. These detailed mechanisms contain a large number of chemical species participating simultaneously in many elementary kinetic steps. Current computational fluid dynamic (CFD) models must include fuel vaporization, fuel-air mixing, chemical reactions, and complicated boundary geometries. To simulate these conditions a very sophisticated computer model is required, which requires large computer memory capacity and long run times. Therefore, gas turbine combustion modeling has frequently been simplified by using global reaction mechanisms, which can predict only the quantities of interest: heat release rates, flame temperature, and emissions. Jet fuels are wide-boiling-range hydrocarbons with ranges extending through those of gasoline and kerosene. These fuels are chemically complex, often containing more than 300 components. Jet fuel typically can be characterized as containing 70 vol pct paraffin compounds and 25 vol pct aromatic compounds. A five-step Jet-A fuel mechanism which involves pyrolysis and subsequent oxidation of paraffin and aromatic compounds is presented here. This mechanism is verified by comparing with Jet-A fuel ignition delay time experimental data, and species concentrations obtained from flametube experiments. This five-step mechanism appears to be better than the current one- and two-step mechanisms.

Lee, Chiming; Kundu, K.; Ghorashi, B.

1993-01-01T23:59:59.000Z

158

Method for operating a combustor in a fuel cell system  

DOE Patents (OSTI)

A method of operating a combustor to heat a fuel processor in a fuel cell system, in which the fuel processor generates a hydrogen-rich stream a portion of which is consumed in a fuel cell stack and a portion of which is discharged from the fuel cell stack and supplied to the combustor, and wherein first and second streams are supplied to the combustor, the first stream being a hydrocarbon fuel stream and the second stream consisting of said hydrogen-rich stream, the method comprising the steps of monitoring the temperature of the fuel processor; regulating the quantity of the first stream to the combustor according to the temperature of the fuel processor; and comparing said quantity of said first stream to a predetermined value or range of predetermined values.

Chalfant, Robert W. (West Henrietta, NY); Clingerman, Bruce J. (Palmyra, NY)

2002-01-01T23:59:59.000Z

159

Lessons from Large-Scale Renewable Energy Integration Studies: Preprint  

Science Conference Proceedings (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

160

Large-Scale Hydropower Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

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

Large-Scale Hydropower Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

162

Introduction to Renewable Energy Biomass Captured solar energy from biological systems currently plays a large role in  

E-Print Network (OSTI)

Introduction to Renewable Energy ­ Biomass Captured solar energy from biological systems currently of biomass for large-scale energy services could help reduce the greenhouse gas intensity of the energy be processed and utilized in a similar manner to fossil fuels with lower net emissions of CO2. Biomass energy

Nur, Amos

163

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

164

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]

165

Free energy and surface tension of arbitrarily large Mackay icosahedral clusters  

E-Print Network (OSTI)

Free energy and surface tension of arbitrarily large Mackay icosahedral clusters Richard B. Mc for predicting the free energy of arbitrarily large Mackay icosahedral clusters. van der Waals clusters free energies for larger clusters 561 atoms . Combining these predictions with correlations

Goddard III, William A.

166

Large-Scale Integration of Deferrable Demand and Renewable Energy Sources  

E-Print Network (OSTI)

1 Large-Scale Integration of Deferrable Demand and Renewable Energy Sources Anthony Papavasiliou model for assessing the impacts of the large-scale integration of renewable energy sources. In order to accurately assess the impacts of renewable energy integration and demand response integration

Oren, Shmuel S.

167

Large-Scale Renewable Energy Producers Property Tax Abatement...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

up to 20 years for real and personal property used to generate electricity from renewable energy resources including solar, wind, biomass*, fuel cells, geothermal or hydro....

168

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

169

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

170

Energy efficiency strategies in refrigeration systems of large supermarkets  

Science Conference Proceedings (OSTI)

Energy efficiency and its relationship with sustainable development are one of the most important objectives in modern engineering systems. In Industrial Installations that use refrigeration systems that are associated with the food industry, this optimization ... Keywords: energy efficiency, optimizing parameters, refrigeration systems, supermarkets

J. M. Garcia; L. M. R. Coelho

2010-07-01T23:59:59.000Z

171

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

172

Web-based energy information systems for large commercial buildings  

SciTech Connect

Energy Information Systems (EIS), which monitor and organize building energy consumption and related trend data over the Internet, have been evolving over the past decade. This technology helps perform key energy management functions such as organizing energy use data, identifying energy consumption anomalies, managing energy costs, and automating demand response strategies. During recent years numerous developers and vendors of EIS have been deploying these products in a highly competitive market. EIS offer various software applications and services for a variety of purposes. Costs for such system vary greatly depending on the system's capabilities and how they are marketed. Some products are marketed directly to end users while others are made available as part of electric utility programs. EIS can be a useful tool in building commissioning and retro-commissioning. This paper reviews more than a dozen EIS. We have developed an analytical framework to characterize the main features of these products, which are developed for a variety of utility programs and end-use markets. The purpose of this research is to evaluate EIS capabilities and limitations, plus examine longer-term opportunities for utilizing such technology to improve building energy efficiency and load management.

Motegi, Naoya; Piette, Mary Ann

2003-03-29T23:59:59.000Z

173

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

Science Conference Proceedings (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

174

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network (OSTI)

at NERSC, Intrepid at ALCF, and Linux clusters. Most of themoved to Intrepid at the ALCF. The completion of this taskEnergy Physics Appendix  C. ALCF AMR ASCR BAO BELLA CCSE

Gerber, Richard A.

2011-01-01T23:59:59.000Z

175

Nevada Weatherizes Large-Scale Complex | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

176

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

177

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,

178

External combustor for gas turbine engine  

DOE Patents (OSTI)

An external combustor for a gas turbine engine has a cyclonic combustion chamber into which combustible gas with entrained solids is introduced through an inlet port in a primary spiral swirl. A metal draft sleeve for conducting a hot gas discharge stream from the cyclonic combustion chamber is mounted on a circular end wall of the latter adjacent the combustible gas inlet. The draft sleeve is mounted concentrically in a cylindrical passage and cooperates with the passage in defining an annulus around the draft sleeve which is open to the cyclonic combustion chamber and which is connected to a source of secondary air. Secondary air issues from the annulus into the cyclonic combustion chamber at a velocity of three to five times the velocity of the combustible gas at the inlet port. The secondary air defines a hollow cylindrical extension of the draft sleeve and persists in the cyclonic combustion chamber a distance of about three to five times the diameter of the draft sleeve. The hollow cylindrical extension shields the drive sleeve from the inlet port to prevent discharge of combustible gas through the draft sleeve.

Santanam, Chandran B. (Indianapolis, IN); Thomas, William H. (Indianapolis, IN); DeJulio, Emil R. (Columbus, IN)

1991-01-01T23:59:59.000Z

179

Fossil Energy Techline, “DOE Completes Large-Scale Carbon  

E-Print Network (OSTI)

and represents a summary of carbon sequestration news covering the past month. Readers are referred to the actual article(s) for complete information. It is produced by the National Energy Technology Laboratory to provide information on recent activities and publications related to carbon sequestration. It covers domestic, international, public sector, and private sector news.

unknown authors

2008-01-01T23:59:59.000Z

180

Energy Consumption Models and Predictions for Large-Scale Systems  

Science Conference Proceedings (OSTI)

Responsible, efficient and well-planned power consumption is becoming a necessity for monetary returns and scalability of computing infrastructures. While there are numerous sources from which power data can be obtained, analyzing this data is an intrinsically ... Keywords: Energy model, Grid'5000, distrbuted systems

Taghrid Samak, Christine Morin, David Bailey

2013-05-01T23:59:59.000Z

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.


181

Large Distributed Energy Resource Options to Alleviate Transmission Constraints  

Science Conference Proceedings (OSTI)

Utility transmission systems require extensive investment for infrastructure upkeep. In addition, load growth requires upgrades to guard against overloading or loss of load. In some situations, an investment in a traditional transmission system upgrade may not be the most economic option. It may be possible to defer the need for an upgrade using distributed energy resources (DER), and in doing so, reduce the economic impact to the utility and its ratepayers. Additional considerations, such as impact on s...

2006-02-15T23:59:59.000Z

182

Large enhancement of Forster resonance energy transfer on graphene platforms  

E-Print Network (OSTI)

In the view of the applications of Forster resonant energy transfer (FRET) in biological systems which especially require FRET in the inrared region we investigate the great advantage of graphene plasmonics in such studies. Focusing on the fundamental aspects of FRET between a donor-acceptor pair on a graphene platform showing that FRET mediated by the plasmons in graphene is broadband and enhanced by six orders of magnitude. We briefly discuss the impact of phonon-polaritonic substrates.

Svend-Age Biehs; Girish S. Agarwal

2013-10-28T23:59:59.000Z

183

Incentive systems for large-scale energy projects  

Science Conference Proceedings (OSTI)

The potential benefits to be obtained and costs incurred from imposing an incentive rate of return system on a project which is government subsidized or is being considered by a regulated utility are described. The logical and procedural steps for measuring cost performance and determining the reward/penalty function for such a system are developed. An important certainty-enhancing feature is discussed. Then two real incentive return systems for large construction projects currently in place are critically appraised in light of criteria previously developed. 24 references, 4 figures, 3 tables.

Hass, J.E.

1984-01-01T23:59:59.000Z

184

Combustor with two stage primary fuel assembly  

DOE Patents (OSTI)

A combustor for a gas turbine having first and second passages for pre-mixing primary fuel and air supplied to a primary combustion zone. The flow of fuel to the first and second pre-mixing passages is separately regulated using a single annular fuel distribution ring having first and second row of fuel discharge ports. The interior portion of the fuel distribution ring is divided by a baffle into first and second fuel distribution manifolds and is located upstream of the inlets to the two pre-mixing passages. The annular fuel distribution ring is supplied with fuel by an annular fuel supply manifold, the interior portion of which is divided by a baffle into first and second fuel supply manifolds. A first flow of fuel is regulated by a first control valve and directed to the first fuel supply manifold, from which the fuel is distributed to first fuel supply tubes that direct it to the first fuel distribution manifold. From the first fuel distribution manifold, the first flow of fuel is distributed to the first row of fuel discharge ports, which direct it into the first pre-mixing passage. A second flow of fuel is regulated by a second control valve and directed to the second fuel supply manifold, from which the fuel is distributed to second fuel supply tubes that direct it to the second fuel distribution manifold. From the second fuel distribution manifold, the second flow of fuel is distributed to the second row of fuel discharge ports, which direct it into the second pre-mixing passage.

Sharifi, Mehran (Winter Springs, FL); Zolyomi, Wendel (Oviedo, FL); Whidden, Graydon Lane (Orlando, FL)

2000-01-01T23:59:59.000Z

185

Missing energy in black hole production and decay at the Large Hadron Collider  

E-Print Network (OSTI)

Black holes could be produced at the Large Hadron Collider in TeV-scale gravity scenarios. We discuss missing energy mechanisms in black hole production and decay in large extra-dimensional models. In particular, we examine how graviton emission into the bulk could give the black hole enough recoil to leave the brane. Such a perturbation would cause an abrupt termination in Hawking emission and result in large missing-energy signatures.

Douglas M. Gingrich

2007-06-05T23:59:59.000Z

186

Free energy and surface tension of arbitrarily large Mackay icosahedral clusters  

Science Conference Proceedings (OSTI)

We present a model for predicting the free energy of arbitrarily large Mackay icosahedral clusters. van der Waals clusters are experimentally observed to be particularly stable at magic numbers corresponding to these structures. Explicit calculations on the vibrational states were used to determine the spectrum of fundamental frequencies for smaller (?561) icosahedral clusters. The scaled cumulative frequency distribution function rapidly approaches a limiting function for large clusters. This function was used to predict zero?point energies and vibrational free energies for larger clusters (?561 atoms). Combining these predictions with correlations for the moment of inertia and for the minimum potential energy of large clusters leads to free energies of arbitrary large clusters. The free energies are used to predict the chemical potential and surface tension as a function of size and temperature. This connects macroscopic properties to the microscopic atomic parameters.

Richard B. McClurg; Richard C. Flagan; W. A. Goddard III

1995-01-01T23:59:59.000Z

187

Lean Blow-Out Prediction in Gas Turbine Combustors Using Symbolic Time Series Analysis  

E-Print Network (OSTI)

Lean Blow-Out Prediction in Gas Turbine Combustors Using Symbolic Time Series Analysis Achintya of lean blowout in gas turbine combustors based on symbolic analysis of time series data from optical. For the purpose of detecting lean blowout in gas turbine combustors, the state probability vector obtained

Ray, Asok

188

A Comprehensive Energy Audit of a Large Production Unit in Six Weeks  

E-Print Network (OSTI)

Past energy audits of petrochemical plant production units at Union Carbide have demonstrated that the key to an effective, comprehensive audit of a large production unit is to minimize the time period requirement for the team activity. This paper describes a comprehensive energy audit performed in six weeks on a large and relatively new production unit. This audit resulted in identifying and evaluating 62 opportunities reducing annual energy usage by $2,000.000.

Korich, R. D.

1980-01-01T23:59:59.000Z

189

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

NLE Websites -- All DOE Office Websites (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

190

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

191

Nondestructive evaluation of ceramic matrix composite combustor components.  

SciTech Connect

Combustor liners fabricated from a SiC/SiC composite were nondestructively interrogated before and after combustion rig testing. The combustor liners were inspected by X-ray, ultrasonic and thermographic techniques. In addition, mechanical test results were obtained from witness coupons, representing the as-manufactured liners, and from coupons machined from the components after combustion exposure. Thermography indications were found to correlate with reduced material properties obtained after rig testing. Microstructural examination of the SiC/SiC liners revealed the thermography indications to be delaminations and damaged fiber tows.

Sun, J. G.; Verrilli, M. J.; Stephan, R.; Barnett, T. R.; Ojard, G.

2002-11-08T23:59:59.000Z

192

Design and fabrication of a meso-scale stirling engine and combustor.  

DOE Green Energy (OSTI)

Power sources capable of supplying tens of watts are needed for a wide variety of applications including portable electronics, sensors, micro aerial vehicles, and mini-robotics systems. The utility of these devices is often limited by the energy and power density capabilities of batteries. A small combustion engine using liquid hydrocarbon fuel could potentially increase both power and energy density by an order of magnitude or more. This report describes initial development work on a meso-scale external combustion engine based on the Stirling cycle. Although other engine designs perform better at macro-scales, we believe the Stirling engine cycle is better suited to small-scale applications. The ideal Stirling cycle requires efficient heat transfer. Consequently, unlike other thermodynamic cycles, the high heat transfer rates that are inherent with miniature devices are an advantage for the Stirling cycle. Furthermore, since the Stirling engine uses external combustion, the combustor and engine can be scaled and optimized semi-independently. Continuous combustion minimizes issues with flame initiation and propagation. It also allows consideration of a variety of techniques to promote combustion that would be difficult in a miniature internal combustion engine. The project included design and fabrication of both the engine and the combustor. Two engine designs were developed. The first used a cylindrical piston design fabricated with conventional machining processes. The second design, based on the Wankel rotor geometry, was fabricated by through-mold electroforming of nickel in SU8 and LIGA micromolds. These technologies provided the requisite precision and tight tolerances needed for efficient micro-engine operation. Electroformed nickel is ideal for micro-engine applications because of its high strength and ductility. A rotary geometry was chosen because its planar geometry was more compatible with the fabrication process. SU8 lithography provided rapid prototypes to verify the design. A final high precision engine was created via LIGA. The micro-combustor was based on an excess enthalpy concept. Development of a micro-combustor included both modeling and experiments. We developed a suite of simulation tools both in support of the design of the prototype combustors, and to investigate more fundamental aspects of combustion at small scales. Issues of heat management and integration with the micro-scale Stirling engine were pursued using CFD simulations. We found that by choice of the operating conditions and channel dimensions energy conversion occurs by catalysis-dominated or catalysis-then-homogeneous phase combustion. The purpose of the experimental effort in micro-combustion was to study the feasibility and explore the design parameters of excess enthalpy combustors. The efforts were guided by the necessity for a practical device that could be implemented in a miniature power generator, or as a stand-alone device used for heat generation. Several devices were fabricated and successfully tested using methane as the fuel.

Echekki, Tarek (Sandia National Laboratories, Livermore, CA); Haroldsen, Brent L. (Sandia National Laboratories, Livermore, CA); Krafcik, Karen L. (Sandia National Laboratories, Livermore, CA); Morales, Alfredo Martin (Sandia National Laboratories, Livermore, CA); Mills, Bernice E. (Sandia National Laboratories, Livermore, CA); Liu, Shiling (Sandia National Laboratories, Livermore, CA); Lee, Jeremiah C. (Sandia National Laboratories, Livermore, CA); Karpetis, Adionos N. (Sandia National Laboratories, Livermore, CA); Chen, Jacqueline H. (Sandia National Laboratories, Livermore, CA); Ceremuga, Joseph T. (Sandia National Laboratories, Livermore, CA); Raber, Thomas N. (Sandia National Laboratories, Livermore, CA); Hekmuuaty, Michelle A. (Sandia National Laboratories, Livermore, CA)

2005-05-01T23:59:59.000Z

193

Assessing the Role of Energy in Development and Climate Policies in Large Developing Countries  

E-Print Network (OSTI)

Assessing the Role of Energy in Development and Climate Policies in Large Developing Countries Amit policy goals related to sustainable development (SD), energy and climate can be integrated. However that can be used to assess development, energy and climate policies is introduced and empirical indicators

194

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource  

E-Print Network (OSTI)

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over on Wind Energy Resource over Europe and its Intermittency Pascal Kriesche* and Adam Schlosser* Abstract In times of increasing importance of wind power in the world's energy mix, this study focuses on a better

195

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

NLE Websites -- All DOE Office Websites (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.

196

Energy and Spectral Efficiency of Very Large Multiuser MIMO Systems  

E-Print Network (OSTI)

A multiplicity of autonomous terminals simultaneously transmits data streams to a compact array of antennas. The array uses imperfect channel-state information derived from transmitted pilots to extract the individual data streams. The power radiated by the terminals can be made inversely proportional to the square-root of the number of base station antennas with no reduction in performance. In contrast if perfect channel-state information were available the power could be made inversely proportional to the number of antennas. Lower capacity bounds for maximum-ratio combining (MRC), zero-forcing (ZF) and minimum mean-square error (MMSE) detection are derived. A MRC receiver normally performs worse than ZF and MMSE. However as power levels are reduced, the cross-talk introduced by the inferior maximum-ratio receiver eventually falls below the noise level and this simple receiver becomes a viable option. The tradeoff between the energy efficiency (as measured in bits/J) and spectral efficiency (as measured in b...

Ngo, Hien Quoc; Marzetta, Thomas L

2011-01-01T23:59:59.000Z

197

Characterization of melt-infiltrated SiC/SiC composite combustor liners using meso- and micro-NDE techniques  

Science Conference Proceedings (OSTI)

Melt-infiltrated ceramic matrix composite SiC/SiC material systems are under development for use in combustor liners for low-emission advanced gas turbines. Uncertainty in repeatability of processing methods for these large components (33--76 cm diameter), and hence possible reduced reliability for the end user. This requires that appropriate test methods, at both meso- and micro-scale, be used to ensure that the liners are acceptable for use. Nondestructive evaluation (NDE) methods, if demonstrated to reliably detect changes caused by processing, would be of significant benefit to both manufacturer and end user. This paper describes the NDE methods and their applications in detecting a process upset in a melt-infiltrated 33 cm combustor liner and how high-resolution scanning electron microscopy was used to verify the NDE data.

Ellingson, W. A.; Sun, J. G.; More, K. L.; Hines, R.

2000-01-26T23:59:59.000Z

198

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

SciTech Connect

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

199

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

200

Coanda injection system for axially staged low emission combustors  

SciTech Connect

The low emission combustor includes a combustor housing defining a combustion chamber having a plurality of combustion zones. A liner sleeve is disposed in the combustion housing with a gap formed between the liner sleeve and the combustor housing. A secondary nozzle is disposed along a centerline of the combustion chamber and configured to inject a first fluid comprising air, at least one diluent, fuel, or combinations thereof to a downstream side of a first combustion zone among the plurality of combustion zones. A plurality of primary fuel nozzles is disposed proximate to an upstream side of the combustion chamber and located around the secondary nozzle and configured to inject a second fluid comprising air and fuel to an upstream side of the first combustion zone. The combustor also includes a plurality of tertiary coanda nozzles. Each tertiary coanda nozzle is coupled to a respective dilution hole. The tertiary coanda nozzles are configured to inject a third fluid comprising air, at least one other diluent, fuel, or combinations thereof to one or more remaining combustion zones among the plurality of combustion zones.

Evulet, Andrei Tristan (Clifton Park, NY); Varatharajan, Balachandar (Cincinnati, OH); Kraemer, Gilbert Otto (Greer, SC); ElKady, Ahmed Mostafa (Niskayuna, NY); Lacy, Benjamin Paul (Greer, SC)

2012-05-15T23:59:59.000Z

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

MHD coal combustor technology. Final report, phase II  

DOE Green Energy (OSTI)

The design, performance, and testing of a 20-MW coal combustor for scaleup to 50 MW for use in an MHD generator are described. The design incorporates the following key features: (1) a two-stage combustor with an intermediate slag separator to remove slag at a low temperture, thus minimizing enthalpy losses required for heating and vaporizing the slag; (2) a first-stage pentad (four air streams impinging on one coal stream) injector design with demonstrated efficient mixing, promoting high carbon burnout; (3) a two-section first-stage combustion chamber; the first stage using a thin slag-protected refractory layer and the second section using a thick refractory layer, both to minimize heat losses; (4) a refractory lining in the slag separator to minimize heat losses; (5) a second-stage combustor, which provided both de-swirl of the combustion products exiting from the slag separator and simple mixing of the vitiated secondary air and seed; (6) a dense-phase coal feed system to minimize cold carrier gas entering the first-stage combustors; (7) a dry seed injection system using pulverized K/sub 2/CO/sub 3/ with a 1% amorphous, fumed silicon dioxide additive to enhance flowability, resulting in rapid vaporization and ionization and ensuring maximum performance; and (8) a performance evaluation module (PEM) of rugged design based on an existing, successfully-fired unit. (WHK)

Not Available

1980-09-01T23:59:59.000Z

202

Using existing technologies, designers and operators of large buildings could slash national energy use across a broad  

E-Print Network (OSTI)

Using existing technologies, designers and operators of large buildings could slash national energy of large office buildings and hospitals achieve at least a 50% energy savings using existing technology. Strategies for 50% Energy Savings in Large Office Buildings found that a 50% energy savings can be realized

203

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

NLE Websites -- All DOE Office Websites (Extended Search)

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...

204

Energy Transmission by Barotropic Rossby Waves across Large-Scale Topography  

Science Conference Proceedings (OSTI)

An analytical study investigates the energy transmission by free, barotropic, linear Rossby waves across a large scale bottom topography when topographic and beta-effects have the same order of magnitude. In open ocean regions which are not ...

Bernard Barnier

1984-02-01T23:59:59.000Z

205

ARRA-Multi-Level Energy Storage and Controls for Large-Scale Wind Energy Integration  

DOE Green Energy (OSTI)

The Project Objective is to design innovative energy storage architecture and associated controls for high wind penetration to increase reliability and market acceptance of wind power. The project goals are to facilitate wind energy integration at different levels by design and control of suitable energy storage systems. The three levels of wind power system are: Balancing Control Center level, Wind Power Plant level, and Wind Power Generator level. Our scopes are to smooth the wind power fluctuation and also ensure adequate battery life. In the new hybrid energy storage system (HESS) design for wind power generation application, the boundary levels of the state of charge of the battery and that of the supercapacitor are used in the control strategy. In the controller, some logic gates are also used to control the operating time durations of the battery. The sizing method is based on the average fluctuation of wind profiles of a specific wind station. The calculated battery size is dependent on the size of the supercapacitor, state of charge of the supercapacitor and battery wear. To accommodate the wind power fluctuation, a hybrid energy storage system (HESS) consisting of battery energy system (BESS) and super-capacitor is adopted in this project. A probability-based power capacity specification approach for the BESS and super-capacitors is proposed. Through this method the capacities of BESS and super-capacitor are properly designed to combine the characteristics of high energy density of BESS and the characteristics of high power density of super-capacitor. It turns out that the super-capacitor within HESS deals with the high power fluctuations, which contributes to the extension of BESS lifetime, and the super-capacitor can handle the peaks in wind power fluctuations without the severe penalty of round trip losses associated with a BESS. The proposed approach has been verified based on the real wind data from an existing wind power plant in Iowa. An intelligent controller that increases battery life within hybrid energy storage systems for wind application was developed. Comprehensive studies have been conducted and simulation results are analyzed. A permanent magnet synchronous generator, coupled with a variable speed wind turbine, is connected to a power grid (14-bus system). A rectifier, a DC-DC converter and an inverter are used to provide a complete model of the wind system. An Energy Storage System (ESS) is connected to a DC-link through a DC-DC converter. An intelligent controller is applied to the DC-DC converter to help the Voltage Source Inverter (VSI) to regulate output power and also to control the operation of the battery and supercapacitor. This ensures a longer life time for the batteries. The detailed model is simulated in PSCAD/EMTP. Additionally, economic analysis has been done for different methods that can reduce the wind power output fluctuation. These methods are, wind power curtailment, dumping loads, battery energy storage system and hybrid energy storage system. From the results, application of single advanced HESS can save more money for wind turbines owners. Generally the income would be the same for most of methods because the wind does not change and maximum power point tracking can be applied to most systems. On the other hand, the cost is the key point. For short term and small wind turbine, the BESS is the cheapest and applicable method while for large scale wind turbines and wind farms the application of advanced HESS would be the best method to reduce the power fluctuation. The key outcomes of this project include a new intelligent controller that can reduce energy exchanged between the battery and DC-link, reduce charging/discharging cycles, reduce depth of discharge and increase time interval between charge/discharge, and lower battery temperature. This improves the overall lifetime of battery energy storages. Additionally, a new design method based on probability help optimize the power capacity specification for BESS and super-capacitors. Recommendations include experimental imp

David Wenzhong Gao

2012-09-30T23:59:59.000Z

206

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

NLE Websites -- All DOE Office Websites (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

207

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

NLE Websites -- All DOE Office Websites (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

208

U.S. Energy Infrastructure Investment: Large-Scale Integrated Smart Grid  

E-Print Network (OSTI)

U.S. Energy Infrastructure Investment: Large-Scale Integrated Smart Grid Solutions with High: LargeScale Integrated Smart Grid Solutions with High Penetration of Renewable Resources, Dispersed- ing electricity grid. Much attention is being given to smart grid development in the U.S. and around

209

Smart energy monitoring and management in large multi-office building environments  

Science Conference Proceedings (OSTI)

Buildings are among the largest consumers of electricity with a significant portion of this energy use is wasted in unoccupied areas or improperly installed devices. Identifying such power leaks is hard especially in large office and enterprise buildings. ... Keywords: WSN, building automation, deployment, energy management, internet of things, smart meters, zigbee

Akribopoulos Orestis, Amaxilatis Dimitrios, Dimakopolos Dimitrios, Chatzigiannakis Ioannis

2013-09-01T23:59:59.000Z

210

Ultra high energy cosmic rays and the large scale structure of the galactic magnetic field  

E-Print Network (OSTI)

We study the deflection of ultra high energy cosmic ray protons in different models of the regular galactic magnetic field. Such particles have gyroradii well in excess of 1 kpc and their propagation in the galaxy reflects only the large scale structure of the galactic magnetic field. A future large experimental statistics of cosmic rays of energy above 10$^{19}$ eV could be used for a study of the large scale structure of the galactic magnetic field if such cosmic rays are indeed charged nuclei accelerated at powerful astrophysical objects and if the distribution of their sources is not fully isotropic.

Todor Stanev

1996-07-17T23:59:59.000Z

211

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 conservation. At present, the large public buildings have been the emphasis of building energy conservation in China. The functions and the basic construction of energy consumption database management system (ECDBMS) for large public buildings are introduced. The ECDBMS is developed by using SQL Server 2000 as the database and PowerBuilder10.0 as the developing tool. It includes five parts such as the basic information of public buildings, the designing parameters of energy-consuming equipments, the operational parameters of energy-consuming equipments, the electric and fuel consumption of buildings, the evaluation of energy efficiency for equipments. The energy consumption database can be accumulated and some functions can be realized by using this database such as the management of building designing parameters and energy consumption data, the evaluation and analysis of building energy consumption.

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

2006-01-01T23:59:59.000Z

212

Dark energy, integrated Sachs-Wolfe effect and large-scale magnetic fields  

E-Print Network (OSTI)

The impact of large-scale magnetic fields on the interplay between the ordinary and integrated Sachs-Wolfe effects is investigated in the presence of a fluctuating dark energy component. The modified initial conditions of the Einstein-Boltzmann hierarchy allow for the simultaneous inclusion of dark energy perturbations and of large-scale magnetic fields. The temperature and polarization angular power spectra are compared with the results obtained in the magnetized version of the (minimal) concordance model. Purported compensation effects arising at large scales are specifically investigated. The fluctuating dark energy component modifies, in a computable manner, the shapes of the 1- and 2-$\\sigma$ contours in the parameter space of the magnetized background. The allowed spectral indices and magnetic field intensities turn out to be slightly larger than those determined in the framework of the magnetized concordance model where the dark energy fluctuations are absent.

Massimo Giovannini

2009-07-18T23:59:59.000Z

213

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

214

Large hospitals tend to be energy-intensive - Today in Energy ...  

U.S. Energy Information Administration (EIA)

Energy Information Administration ... solar, wind, geothermal, ... natural gas was the most common main space heating fuel, ...

215

Energy and Cost Savings of Retro-Commissioning and Retrofit Measures for Large Office Buildings  

Science Conference Proceedings (OSTI)

This paper evaluates the energy and cost savings of seven retro-commissioning measures and 29 retrofit measures applicable to most large office buildings. The baseline model is for a hypothetical building with characteristics of large office buildings constructed before 1980. Each retro-commissioning measure is evaluated against the original baseline in terms of its potential of energy and cost savings while each retrofit measure is evaluated against the commissioned building. All measures are evaluated in five locations (Miami, Las Vegas, Seattle, Chicago and Duluth) to understand the impact of weather conditions on energy and cost savings. The results show that implementation of the seven operation and maintenance measures as part of a retro-commissioning process can yield an average of about 22% of energy use reduction and 14% of energy cost reduction. Widening zone temperature deadband, lowering VAV terminal minimum air flow set points and lighting upgrades are effective retrofit measures to be considered.

Wang, Weimin; Zhang, Jian; Moser, Dave; Liu, Guopeng; Athalye, Rahul A.; Liu, Bing

2012-08-03T23:59:59.000Z

216

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

DOE Data Explorer (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].

217

Disk Accretion Flow Driven by Large-Scale Magnetic Fields: Solutions with Constant Specific Energy  

E-Print Network (OSTI)

(Abridged) We study the dynamical evolution of a stationary, axisymmetric, and perfectly conducting cold accretion disk containing a large-scale magnetic field around a Kerr black hole, trying to understand the relation between accretion and the transportation of angular momentum and energy. We solve the radial momentum equation for solutions corresponding to an accretion flow that starts from a subsonic state at infinity, smoothly passes the fast critical point, then supersonically falls into the horizon of the black hole. The solutions always have the following features: 1) The specific energy of fluid particles remains constant but the specific angular momentum is effectively removed by the magnetic field. 2) At large radii, where the disk motion is dominantly rotational, the energy density of the magnetic field is equipartitioned with the rotational energy density of the disk. 3) Inside the fast critical point, where radial motion becomes important, the ratio of the electromagnetic energy density to the kinetic energy density drops quickly. The results indicate that: 1) Disk accretion does not necessarily imply energy dissipation since magnetic fields do not have to transport or dissipate a lot of energy as they effectively transport angular momentum. 2) When resistivity is small, the large-scale magnetic field is amplified by the shearing rotation of the disk until the magnetic energy density is equipartitioned with the rotational energy density, ending up with a geometrically thick disk. This is in contrast with the evolution of small-scale magnetic fields where if the resistivity is nonzero the magnetic energy density is likely to be equipartitioned with the kinetic energy density associated with local random motions (e.g., turbulence), making a thin Keplerian disk possible.

Li-Xin Li

2002-12-20T23:59:59.000Z

218

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

SciTech Connect

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

219

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

SciTech Connect

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

220

Understanding and Control of Combustion Dynamics in Gas Turbine Combustors  

NLE Websites -- All DOE Office Websites (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

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

System and method for reducing combustion dynamics in a combustor  

Science Conference Proceedings (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

222

Vortex combustor for low NOX emissions when burning lean premixed high hydrogen content fuel  

Science Conference Proceedings (OSTI)

A trapped vortex combustor. The trapped vortex combustor is configured for receiving a lean premixed gaseous fuel and oxidant stream, where the fuel includes hydrogen gas. The trapped vortex combustor is configured to receive the lean premixed fuel and oxidant stream at a velocity which significantly exceeds combustion flame speed in a selected lean premixed fuel and oxidant mixture. The combustor is configured to operate at relatively high bulk fluid velocities while maintaining stable combustion, and low NOx emissions. The combustor is useful in gas turbines in a process of burning synfuels, as it offers the opportunity to avoid use of diluent gas to reduce combustion temperatures. The combustor also offers the possibility of avoiding the use of selected catalytic reaction units for removal of oxides of nitrogen from combustion gases exiting a gas turbine.

Steele, Robert C; Edmonds, Ryan G; Williams, Joseph T; Baldwin, Stephen P

2012-11-20T23:59:59.000Z

223

Vortex combustor for low NOx emissions when burning lean premixed high hydrogen content fuel  

DOE Patents (OSTI)

A trapped vortex combustor. The trapped vortex combustor is configured for receiving a lean premixed gaseous fuel and oxidant stream, where the fuel includes hydrogen gas. The trapped vortex combustor is configured to receive the lean premixed fuel and oxidant stream at a velocity which significantly exceeds combustion flame speed in a selected lean premixed fuel and oxidant mixture. The combustor is configured to operate at relatively high bulk fluid velocities while maintaining stable combustion, and low NOx emissions. The combustor is useful in gas turbines in a process of burning synfuels, as it offers the opportunity to avoid use of diluent gas to reduce combustion temperatures. The combustor also offers the possibility of avoiding the use of selected catalytic reaction units for removal of oxides of nitrogen from combustion gases exiting a gas turbine.

Steele, Robert C. (Woodinville, WA); Edmonds, Ryan G. (Renton, WA); Williams, Joseph T. (Kirkland, WA); Baldwin, Stephen P. (Winchester, MA)

2009-10-20T23:59:59.000Z

224

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

225

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

226

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

227

Gas Turbine Combustor Performance on Synthetic Fuels, Volume 1  

Science Conference Proceedings (OSTI)

This volume presents complete data from a test program to determine the behavior of several coal-derived and shale-derived liquid fuels when burned in state-of-the-art combustion turbine engines. The methods used in analyzing the test results are described. The heat transfer effects on gas turbine combustors are discussed, as well as NOx and other emissions effects and predictions.

1980-11-01T23:59:59.000Z

228

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

229

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.

230

Sectoral combustor for burning low-BTU fuel gas  

SciTech Connect

A high-temperature combustor for burning low-BTU coal gas in a gas turbine is disclosed. The combustor includes several separately removable combustion chambers each having an annular sectoral cross section and a double-walled construction permitting separation of stresses due to pressure forces and stresses due to thermal effects. Arrangements are described for air-cooling each combustion chamber using countercurrent convective cooling flow between an outer shell wall and an inner liner wall and using film cooling flow through liner panel grooves and along the inner liner wall surface, and for admitting all coolant flow to the gas path within the inner liner wall. Also described are systems for supplying coal gas, combustion air, and dilution air to the combustion zone, and a liquid fuel nozzle for use during low-load operation. The disclosed combustor is fully air-cooled, requires no transition section to interface with a turbine nozzle, and is operable at firing temperatures of up to 3000.degree. F. or within approximately 300.degree. F. of the adiabatic stoichiometric limit of the coal gas used as fuel.

Vogt, Robert L. (Schenectady, NY)

1980-01-01T23:59:59.000Z

231

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

Science Conference Proceedings (OSTI)

Spectra measured by an extreme ultraviolet (EUV) spectrometer frequently suffer large spike noise when Large Helical Device is operated in low-density range ({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

232

100 Hour test of the pressurized woodchip-fired gravel bed combustor  

DOE Green Energy (OSTI)

Combustion of wood chips in a packed bed combustor for a gas turbine cogeneration system is described. A discussion on flue gas emissions and mass balances is included.

Ragland, K.W.; Aerts, D.J.

1994-08-01T23:59:59.000Z

233

Large-Nc estimate of the chiral low-energy constants  

E-Print Network (OSTI)

Chiral low-energy constants incorporate short-distance information from the dynamics involving heavier degrees of freedom not present in the chiral Lagrangian. We have studied the contribution of the lightest resonances to the chiral low-energy constants, up to O(p^6), within a systematic procedure guided by the large-Nc limit of QCD and also including short-distance asymptotic constraints.

J. Portoles

2007-02-18T23:59:59.000Z

234

Large hospitals tend to be energy-intensive - Today in Energy ...  

U.S. Energy Information Administration (EIA)

... used energy for generating electricity, primarily for emergency back-up generation. Fuel oil was by far the most common fuel used for this ...

235

Catalytic Combustor for Fuel-Flexible Turbine  

NLE Websites -- All DOE Office Websites (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

236

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

Science Conference Proceedings (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

237

Large-scale Probabilistic Forecasting in Energy Systems using Sparse Gaussian Conditional Random Fields  

E-Print Network (OSTI)

pricing. Although it is known that probabilistic forecasts (which give a distribution over possible futureLarge-scale Probabilistic Forecasting in Energy Systems using Sparse Gaussian Conditional Random Fields Matt Wytock and J. Zico Kolter Abstract-- Short-term forecasting is a ubiquitous practice

Kolter, J. Zico

238

Mass burning rate of premixed stretched flames: integral analysis versus large activation energy asymptotics  

E-Print Network (OSTI)

Mass burning rate of premixed stretched flames: integral analysis versus large activation energy, The Netherlands Abstract. New expressions for the mass burning rate are derived from a recently introduced burning rate. The consequences for experimental and numerical studies are investigated. Keywords: premixed

Eindhoven, Technische Universiteit

239

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

NLE Websites -- All DOE Office Websites (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

240

Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

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

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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.

242

Energy Extraction in the CERN Large Hadron Collider a Project Overview  

E-Print Network (OSTI)

In case of a resistive transition (quench), fast and reliable extraction of the magnetic energy, stored in the superconducting coils of the electromagnets of a particle collider, represents an important part of its magnet protection system. In general, the quench detectors, the quench heaters and the cold by-pass diodes across each magnet, together with the energy extraction facilities provide the required protection of the quenching superconductors against damage due to local energy dissipation. In CERN's LHC machine the energy stored in each of its eight superconducting dipole chains exceeds 1300 MJ. Following an opening of the extraction switches this energy will be absorbed in large extraction resistors located in the underground collider tunnel or adjacent galleries, during the exponential current decay. Also the sixteen, 13 kA quadrupole chains (QF, QD) and more than one hundred and fifty, 600 A circuits of the corrector magnets will be equipped with extraction systems. The extraction switch-gear is bas...

Dahlerup-Petersen, K; Kazmine, B; Medvedko, A S; Sytchev, V V; Vasilev, L B

2001-01-01T23:59:59.000Z

243

Large-Scale Renewable Energy Producers Property Tax Abatement (Nevada State Office of Energy)  

Energy.gov (U.S. Department of Energy (DOE))

New or expanded businesses in Nevada may apply to the Director of the State Office of Energy for a property tax abatement of up to 55% for up to 20 years for real and personal property used to...

244

Brownfields to green energy : redeveloping contaminated lands with large-scale renewable energy facilities  

E-Print Network (OSTI)

This thesis uses case studies of one unsuccessful, and three successful brownfield-to-renewable energy projects to identify common barriers such projects face and how those barriers can be overcome. The most significant ...

Jensen, Bjorn B. (Bjorn Benjamin)

2010-01-01T23:59:59.000Z

245

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

NLE Websites -- All DOE Office Websites (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.

246

Multicasting in Large Wireless Networks: Bounds on the Minimum Energy per Bit  

E-Print Network (OSTI)

We consider scaling laws for maximal energy efficiency of communicating a message to all the nodes in a wireless network, as the number of nodes in the network becomes large. Two cases of large wireless networks are studied -- dense random networks and constant density (extended) random networks. In addition, we also study finite size regular networks in order to understand how regularity in node placement affects energy consumption. We first establish an information-theoretic lower bound on the minimum energy per bit for multicasting in arbitrary wireless networks when the channel state information is not available at the transmitters. Upper bounds are obtained by constructing a simple flooding scheme that requires no information at the receivers about the channel states or the locations and identities of the nodes. The gap between the upper and lower bounds is only a constant factor for dense random networks and regular networks, and differs by a poly-logarithmic factor for extended random networks. Further...

Jain, Aman; Verdu, Sergio

2009-01-01T23:59:59.000Z

247

The role of reactant unmixedness, strain rate, and length scale on premixed combustor performance  

DOE Green Energy (OSTI)

Lean premixed combustion provides a means to reduce pollutant formation and increase combustion efficiency. However, fuel-air mixing is rarely uniform in space and time. This nonuniformity in concentration will lead to relative increases in pollutant formation and decreases in combustion efficiency. The nonuniformity of the concentration at the exit of the premixer has been defined by Lyons (1981) as the ``unmixedness.`` Although turbulence properties such as length scales and strain rate are known to effect unmixedness, the exact relationship is unknown. Evaluating this relationship and the effect of unmixedness in premixed combustion on pollutant formation and combustion efficiency are an important part of the overall goal of US Department of Energy`s Advanced Turbine System (ATS) program and are among the goals of the program described herein. The information obtained from ATS is intended to help to develop and commercialize gas turbines. The contributions to the program which the University of California (Irvine) Combustion Lab (UCICL) will provide are: (1) establish the relationship of inlet unmixedness, length scales, and mean strain rate to performance, (2) determine the optimal levels of inlet unmixedness, length scales, and mean strain rates to maximize combustor performance, and (3) identify efficient premixing methods for achieving the necessary inlet conditions. The program during this reporting period is focused on developing a means to measure and qualify different degrees of temporal and spatial unmixedness. Laser diagnostic methods for planer unmixedness measurements are being developed and preliminary results are presented herein. These results will be used to (1), aid in the design of experimental premixers, and (2), determine the unmixedness which will be correlated with the emissions of the combustor. This measure of unmixedness coupled with length scale, strain rate and intensity information is required to attain the UCI goals.

Samuelsen, S.; LaRue, J.; Vilayanur, S.; Guillaume, D.

1995-12-31T23:59:59.000Z

248

Coal desulfurization in a rotary kiln combustor  

Science Conference Proceedings (OSTI)

Several issues that could have an impact on the capability to burn anthracite culm in a rotary bed boiler were identified; specifically, questions were raised concerning the specifications of the anthracite culm itself and some relating to the equipment. The anthracite culm delivered was wet, (with more than 10 percent moisture), and coarser than feed material for fluidized boilers. It was felt that using finer fuel, ensuring that it is largely dry, would aid the combustion of anthracite culm. It also appeared that if provisions were made for more efficient internal and external recycle of ash, this would also enhance the combustion of this fuel. Accordingly, the decision was made to conduct an additional campaign of tests that would incorporate these changes. The tests, conducted on July 15 and 16, 1991, involved an anthracite culm that was, in fact, obtained from a fluidized bed a heating value of 3,000 Btu/lb and came with a top size of 1/4-inch. Despite these changes, sustained combustion could not be achieved without the use of large quantities of supplemental fuel. Based on these tests, we tend to conclude that the rotary kiln is ill suited for the combustion of hard-to-burn, low-grade solid fuels like anthracite culm.

Cobb, J.T. Jr.

1991-08-29T23:59:59.000Z

249

Non-uniform Heat Generation in Micro Catalytic Combustor Takashi Okamasa*, Yuji Suzuki, and Nobuhide Kasagi  

E-Print Network (OSTI)

in ceramic packages are already used in industry, ignition heaters are easily integrated into the plates@thtlab.t.u-tokyo.ac.jp Abstract We developed a micro catalytic combustor using high-precision ceramic tape-casting technology and nano-porous alumina catalyst layer. It is found that failure of the ceramic combustor occurs due

Kasagi, Nobuhide

250

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

E-Print Network (OSTI)

==================== !"#$%&'()*+,-+./,0)12 Development of Micro Ejector for Butane Catalytic Combustor ===== ==== !" = !" = = !" A micro ejector for butane catalytic combustor is investigated. Quasi-1 ejector that the volume flow rate of entrained air can reach 43 times the value of butane when the back

Kasagi, Nobuhide

251

PEER-REVIEW Detection Of Lateral Non-Uniformities In Fluidized Bed Combustors  

E-Print Network (OSTI)

, greatly influences solid circulation patterns and gas phase mixing which inturn affects various in-bed by Dent etal!! in a Fludized bed combustor. For a vertically rising bubble midway through the two sensorsPEER-REVIEW Detection Of Lateral Non-Uniformities In Fluidized Bed Combustors .. A. Venkata Ramayya

Columbia University

252

Simulation of an Electrostatic Energy Harvester at Large Amplitude Narrow and Wide Band Vibrations  

E-Print Network (OSTI)

An electrostatic in-plane overlap varying energy harvester is modeled and simulated using a circuit simulator. Both linear and nonlinear models are investigated. The nonlinear model includes mechanical stoppers at the displacement extremes. Large amplitude excitation signals, both narrow and wide band, are used to emulate environmental vibrations. Nonlinear behavior is significant at large displacement due to the impact on mechanical stoppers. For a sinusoidal excitation the mechanical stoppers cause the output power to flatten and weakly decrease. For a wide band excitation, the output power first increases linearly with the power spectral density of the input signal, then grows slower than linearly.

Tvedt, Lars Geir Whist; Halvorsen, Einar

2008-01-01T23:59:59.000Z

253

Evidence from Two Large Field Experiments that Peer Comparison Feedback Can Reduce Residential Energy Usage  

E-Print Network (OSTI)

Abstract: By providing feedback to customers on home electricity and natural gas usage with a focus on peer comparisons, utilities can reduce energy consumption at a low cost. We analyze data from two large-scale, random-assignment field experiments conducted by utility companies providing electricity (the Sacramento Municipal Utility District (SMUD)) and electricity and natural gas (Puget Sound Energy (PSE)), in partnership with a private company, Positive Energy/oPower, which provides monthly or quarterly mailed peer feedback reports to customers. We find reductions in energy consumption of 1.2 % (PSE) to 2.1% percent (SMUD), with the decrease sustained over time (seven months (PSE) and twelve months (SMUD)).

Ian Ayres Yale; Sophie Raseman Yale; Alice Shih Yale; Ian Ayres; Sophie Raseman; Alice Shih

2010-01-01T23:59:59.000Z

254

DOE/PETC two-stage MHD pressurized coal combustor. Quarterly activity report, April 1-June 30, 1979  

DOE Green Energy (OSTI)

Efforts involved preparing for and conducting scroll combustor test run SC7905, followed by disassembly, inspection and refurbishment of the combustor internals after the run. Numerous design and operational improvements, described in this report, were made to the combustor and its support systems, based on previous run experience, in an effort to extend run duration to 24 hours of continuous operation, burning coal.

Not Available

1979-07-31T23:59:59.000Z

255

Master Plan and Energy Audits at a Large Texas Medical Campus  

E-Print Network (OSTI)

Energy Engineering Associates, Inc. was engaged by the Facilities Resource Management Department at a large medical center in Houston, TX to assist with the development of an Energy Management Master Plan and subsequent individual Detailed Building 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 5-year plan of action to complete detailed audits of existing building inventory and complete energy efficiency retrofit projects to achieve 32 percent reduction in total energy use. The Master Plan called for maximizing incentive payments from the local electric service provider, and for targeting the maximum available funds over the 5-year period. To maximize the return on investment in energy efficiency, the manpower and financial resources were targeted toward the best projects. EEA developed a strategy to assess the current performance of the buildings by evaluating historical utility consumption and building infrastructure data. The energy efficiency targets or benchmarks were established for each building based upon relevant variables. Finally, an analysis of the current performance versus targeted performance was made to define the gap between current usage and targeted efficiency level. Baseline energy consumption models were developed for most of the buildings based upon the HVAC system type installed in the facility. The “Bin Temperature” model calculated the cooling and heating requirements for the buildings based upon local Houston weather data and operating schedule assumptions for lighting and internal loads. The assumptions for internal loads and lighting were calibrated with short term building sub-meter data. Daily and weekly schedule assumptions were verified and total internal loads defined by the meter information. The types of energy savings projects were categorized into the following six groups: 1. Hot Deck Fans 2. Heat Recovery 3. Variable Ventilation 4. Central Plant Projects 5. Commissioning and Controls 6. Lighting Projects

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

2009-11-01T23:59:59.000Z

256

Refractory experience in circulating fluidized bed combustors, Task 7  

Science Conference Proceedings (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

257

Gas Turbine Combustor Performance on Synthetic Fuels, Volume 2  

Science Conference Proceedings (OSTI)

This volume presents a summary of a project to determine the effects of burning currently available coal-derived and shale-derived synthetic liquid fuels in state-of-the-art gas turbine combustors. It describes the fuels tested, the effects of NO emission and of smoke formation and reduction, and a comparison of surrogate and synthetic fuels. The project concluded that a number of selected coal and shale oil fuels can be used in current turbines as soon as these fuels become available.

1981-06-01T23:59:59.000Z

258

The fluidized bed combustor-heater equipped gas fired CCGT  

Science Conference Proceedings (OSTI)

The combustion of natural gas in an atmospheric fluidized bed combined with heat transfer from the bed to the working fluid is shown to be an attractive means for supplying heat to closed cycle gas turbines. It is demonstrated how this concept can yield high thermal efficiencies without the use of high temperature resistant materials and yield low levels of pollutant emissions. The features of the combustor-heater are established for a 9000 kW closed cycle gas turbine generator and comparisons are made with a conventional open cycle machine.

Fejer, A.

1984-06-01T23:59:59.000Z

259

Fluidized bed combustor-heater equipped gas fired CCGT  

Science Conference Proceedings (OSTI)

The combustion of natural gas in an atmospheric fluidized bed combined with heat transfer from the bed to the working fluid is shown to be an attractive means for supplying heat to closed cycle gas turbines. It is demonstrated how this concept can yield high thermal efficiencies without the use of high temperature resistant materials and yield low levels of pollutant emissions. The features of the combustor-heater are established for a 9000 kW closed cycle gas turbine generator and comparisons are made with a conventional open cycle machine.

Fejer, A.A.

1984-01-01T23:59:59.000Z

260

Piloted rich-catalytic lean-burn hybrid combustor  

DOE Patents (OSTI)

A catalytic combustor assembly which includes, an air source, a fuel delivery means, a catalytic reactor assembly, a mixing chamber, and a means for igniting a fuel/air mixture. The catalytic reactor assembly is in fluid communication with the air source and fuel delivery means and has a fuel/air plenum which is coated with a catalytic material. The fuel/air plenum has cooling air conduits passing therethrough which have an upstream end. The upstream end of the cooling conduits is in fluid communication with the air source but not the fuel delivery means.

Newburry, Donald Maurice (Orlando, FL)

2002-01-01T23:59:59.000Z

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.


261

Energy Savings Modeling of Standard Commercial Building Re-tuning Measures: Large Office Buildings  

SciTech Connect

Today, many large commercial buildings use sophisticated building automation systems (BASs) to manage a wide range of building equipment. While the capabilities of BASs have increased over time, many buildings still do not fully use the BAS's capabilities and are not properly commissioned, operated or maintained, which leads to inefficient operation, increased energy use, and reduced lifetimes of the equipment. This report investigates the energy savings potential of several common HVAC system retuning measures on a typical large office building prototype model, using the Department of Energy's building energy modeling software, EnergyPlus. The baseline prototype model uses roughly as much energy as an average large office building in existing building stock, but does not utilize any re-tuning measures. Individual re-tuning measures simulated against this baseline include automatic schedule adjustments, damper minimum flow adjustments, thermostat adjustments, as well as dynamic resets (set points that change continuously with building and/or outdoor conditions) to static pressure, supply air temperature, condenser water temperature, chilled and hot water temperature, and chilled and hot water differential pressure set points. Six combinations of these individual measures have been formulated - each designed to conform to limitations to implementation of certain individual measures that might exist in typical buildings. All of these measures and combinations were simulated in 16 cities representative of specific U.S. climate zones. The modeling results suggest that the most effective energy savings measures are those that affect the demand-side of the building (air-systems and schedules). Many of the demand-side individual measures were capable of reducing annual HVAC system energy consumption by over 20% in most cities that were modeled. Supply side measures affecting HVAC plant conditions were only modestly successful (less than 5% annual HVAC energy savings for most cities for all measures). Combining many of the retuning measures revealed deep savings potential. Some of the more aggressive combinations revealed 35-75% reductions in annual HVAC energy consumption, depending on climate and building vintage.

Fernandez, Nicholas; Katipamula, Srinivas; Wang, Weimin; Huang, Yunzhi; Liu, Guopeng

2012-06-01T23:59:59.000Z

262

Large Hybrid Energy Systems for Making Low CO2 Load-Following Power and Synthetic Fuel  

SciTech Connect

Hybrid energy systems using nuclear heat sources can economically produce load-following electrical power by exploiting the surplus generation capacity available at night or seasonally to make synthetic fuel. Vehicle fuel is the only current energy use large enough to absorb all the energy capacity that might be diverted from the power industry, and its ease of storage obviates problems with discontinuous synfuel production. The potential benefits and challenges of synfuels integration are illustrated by the production of methanol from natural gas (as a source of carbon) using steam from a light water nuclear power reactor which is assumed to be available in accord with a year's worth of power demand data. Methanol's synthesis process is easily adapted to using 300 C heat from a light water reactor and this simple compound can be further processed into gasoline, biodiesel, or dimethyl ether, fuels which can be used with the current vehicle fleet. A supplemental feed to the methanol process of natural gas (for energy) allows operation at constant full rate when the nuclear heat is being used to produce electrical power. The higher capital costs of such a system are offset by a lower cost of heat and power production from a large base load type of plant and by reduced costs associated with much lower CO2 emissions. Other less tangible economic benefits of this and similar hybrid systems include better use of natural resource for fuels and greater energy services security from the domestic production of vehicle fuel.

Robert S. Cherry; Richard D. Boardman; Steven Aumeier

2012-02-01T23:59:59.000Z

263

Copyright 2013 IEEE. Reprinted, with permission from: CERTS Microgrid Demonstration with Large-Scale Energy Storage and  

E-Print Network (OSTI)

improving system reliability and optimizing the use of on-site generation to reduce energy costs) with new large- scale energy storage (2-MW, 4-MWh battery), static disconnect switch (12 kV, 300 Amps

264

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

265

PULSE COMBUSTOR DESIGN QUALIFICATION TEST AND  

E-Print Network (OSTI)

DE-FCZZ-92PC92644 DISCLAIMER This is a report of work sponsored by the United States Government. Neither the United States nor the United States Department of Energy, nor any of their employees, nor any of their support contractors, make 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 not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, mark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of the authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. This report was prepared by ThermoChem, Inc. pursuant to a cost-shared Cooperative Agreement (No. DE-FC22-92PC92644). ThermoChem, its employees, officers or its subcontractors, nor any person acting on behalf of either:

Prepared For; Thermochem Inc; Clean Coal; Feedstock Test

2001-01-01T23:59:59.000Z

266

Meson production in two-photon interactions at energies available at CERN Large Hadron Collider  

E-Print Network (OSTI)

The meson production cross sections are estimated considering photon-photon interactions in hadron - hadron collisions at CERN LHC energies. We consider a large number of mesons with photon-photon partial decay width well constrained by the experiment and some mesons which are currently considered as hadronic molecule and glueball candidates. Our results demonstrate that the experimental analysis of these states is feasible at CERN - LHC.

V. P. Goncalves; D. T. da Silva; W. K. Sauter

2012-09-04T23:59:59.000Z

267

Minimizing Process Energy Use for a Large TMP Mill With Pinch Technology  

Science Conference Proceedings (OSTI)

American Process Inc. conducted an energy targeting scoping study for a large thermomechanical pulping (TMP) mill, using Pinch analysis. The mill produces bleached, unbleached, and semibleached kraft market pulp and standard and offset newsprint. Operations are supported by steam raised in the recovery boiler and in the power boilers. Oil and hog fuels are used in the power boilers. Some power is generated on site and also purchased. The study concentrated on identifying the steps necessary for the mill ...

2000-10-31T23:59:59.000Z

268

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

DOE Green Energy (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

269

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

NLE Websites -- All DOE Office Websites (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

270

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

271

Measuring and tuning energy efficiency on large scale high performance computing platforms.  

Science Conference Proceedings (OSTI)

Recognition of the importance of power in the field of High Performance Computing, whether it be as an obstacle, expense or design consideration, has never been greater and more pervasive. While research has been conducted on many related aspects, there is a stark absence of work focused on large scale High Performance Computing. Part of the reason is the lack of measurement capability currently available on small or large platforms. Typically, research is conducted using coarse methods of measurement such as inserting a power meter between the power source and the platform, or fine grained measurements using custom instrumented boards (with obvious limitations in scale). To collect the measurements necessary to analyze real scientific computing applications at large scale, an in-situ measurement capability must exist on a large scale capability class platform. In response to this challenge, we exploit the unique power measurement capabilities of the Cray XT architecture to gain an understanding of power use and the effects of tuning. We apply these capabilities at the operating system level by deterministically halting cores when idle. At the application level, we gain an understanding of the power requirements of a range of important DOE/NNSA production scientific computing applications running at large scale (thousands of nodes), while simultaneously collecting current and voltage measurements on the hosting nodes. We examine the effects of both CPU and network bandwidth tuning and demonstrate energy savings opportunities of up to 39% with little or no impact on run-time performance. Capturing scale effects in our experimental results was key. Our results provide strong evidence that next generation large-scale platforms should not only approach CPU frequency scaling differently, but could also benefit from the capability to tune other platform components, such as the network, to achieve energy efficient performance.

Laros, James H., III

2011-08-01T23:59:59.000Z

272

LARGE-SCALE PRODUCTION OF HYDROGEN BY NUCLEAR ENERGY FOR THE HYDROGEN ECONOMY  

DOE Green Energy (OSTI)

OAK B202 LARGE-SCALE PRODUCTION OF HYDROGEN BY NUCLEAR ENERGY FOR THE HYDROGEN ECONOMY. The ''Hydrogen Economy'' will reduce petroleum imports and greenhouse gas emissions. However, current commercial hydrogen production processes use fossil fuels and releases carbon dioxide. Hydrogen produced from nuclear energy could avoid these concerns. The authors have recently completed a three-year project for the US Department of Energy whose objective was to ''define an economically feasible concept for production of hydrogen, by nuclear means, using an advanced high-temperature nuclear reactor as the energy source''. Thermochemical water-splitting, a chemical process that accomplishes the decomposition of water into hydrogen and oxygen, met this objective. The goal of the first phase of this study was to evaluate thermochemical processes which offer the potential for efficient, cost-effective, large-scale production of hydrogen and to select one for further detailed consideration. The authors selected the Sulfur-Iodine cycle, In the second phase, they reviewed all the basic reactor types for suitability to provide the high temperature heat needed by the selected thermochemical water splitting cycle and chose the helium gas-cooled reactor. In the third phase they designed the chemical flowsheet for the thermochemical process and estimated the efficiency and cost of the process and the projected cost of producing hydrogen. These results are summarized in this paper.

SCHULTZ,KR; BROWN,LC; BESENBRUCH,GE; HAMILTON,CJ

2003-02-01T23:59:59.000Z

273

Lean premixed flames for low NO{sub x} combustors  

DOE Green Energy (OSTI)

The overall objectives of the research at Purdue are to: obtain a reduced mechanism description of high pressure NO formation chemistry using experiments and calculations for laminar lean premixed methane air flames, develop a statistical model of turbulence NO chemistry interactions using a Bunsen type jet flame, and utilize the high pressure chemistry and turbulence models in a commercial design code, then evaluate its predictions using data from an analog gas turbine combustor. Work to date has resulted in the following achievements: spatially resolved measurements of NO in high-pressure high-temperature flat flames, plus evaluation of the influence of flame radiation on the measured temperature profile; measurements of temperature and velocity PDFs for a turbulent methane/air flame were obtained for the first time, under operating conditions which allow their study in the distributed regimes, and the increase in EINO{sub x} with equivalence ratio predicted using a chemical kinetics model; and simulation of non-reacting combustor flow fields from ambient to elevated pressure and temperature conditions and comparison of those results with experimental velocity profiles.

Sojka, P.; Tseng, L.; Bryyjak, J. [Purdue Univ., Lafayette, IN (United States). Thermal Sciences and Propulsion Center] [and others

1995-12-31T23:59:59.000Z

274

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

NLE Websites -- All DOE Office Websites (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.

275

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 energies on the order of 10 keV and above, including by repeated interactions between electrons and wavefronts. Secondly, 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

2007-12-20T23:59:59.000Z

276

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

277

Behavioral Initiatives for Energy Efficiency: Large-Scale Energy Reductions through Sensors, Feedback & Information Technology  

SciTech Connect

Broad Funding Opportunity Announcement Project: A team of researchers from more than 10 departments at Stanford University is collaborating to transform the way Americans interact with our energy-use data. The team built a web-based platform that collects historical electricity data which it uses to perform a variety of experiments to learn what triggers people to respond. Experiments include new financial incentives, a calculator to understand the potential savings of efficient appliances, new Facebook interface designs, communication studies using Twitter, and educational programs with the Girl Scouts. Economic modeling is underway to better understand how results from the San Francisco Bay Area can be broadened to other parts of the country.

None

2010-01-12T23:59:59.000Z

278

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage  

E-Print Network (OSTI)

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage Yuan Yang develop a new lithium/ polysulfide (Li/PS) semi-liquid battery for large-scale energy storage, with lithium polysulfide (Li2S8) in ether solvent as a catholyte and metallic lithium as an anode. Unlike

Cui, Yi

279

Biomass Energy for Transport and Electricity: Large scale utilization under low CO2 concentration scenarios  

DOE Green Energy (OSTI)

This paper examines the potential role of large scale, dedicated commercial biomass energy systems under global climate policies designed to stabilize atmospheric concentrations of CO2 at 400ppm and 450ppm. We use an integrated assessment model of energy and agriculture systems to show that, given a climate policy in which terrestrial carbon is appropriately valued equally with carbon emitted from the energy system, biomass energy has the potential to be a major component of achieving these low concentration targets. The costs of processing and transporting biomass energy at much larger scales than current experience are also incorporated into the modeling. From the scenario results, 120-160 EJ/year of biomass energy is produced by midcentury and 200-250 EJ/year by the end of this century. In the first half of the century, much of this biomass is from agricultural and forest residues, but after 2050 dedicated cellulosic biomass crops become the dominant source. A key finding of this paper is the role that carbon dioxide capture and storage (CCS) technologies coupled with commercial biomass energy can play in meeting stringent emissions targets. Despite the higher technology costs of CCS, the resulting negative emissions used in combination with biomass are a very important tool in controlling the cost of meeting a target, offsetting the venting of CO2 from sectors of the energy system that may be more expensive to mitigate, such as oil use in transportation. The paper also discusses the role of cellulosic ethanol and Fischer-Tropsch biomass derived transportation fuels and shows that both technologies are important contributors to liquid fuels production, with unique costs and emissions characteristics. Through application of the GCAM integrated assessment model, it becomes clear that, given CCS availability, bioenergy will be used both in electricity and transportation.

Luckow, Patrick; Wise, Marshall A.; Dooley, James J.; Kim, Son H.

2010-01-25T23:59:59.000Z

280

Energy-Efficient Power Control in Multipath CDMA Channels via Large System Analysis  

E-Print Network (OSTI)

This paper is focused on the design and analysis of power control procedures for the uplink of multipath code-division-multiple-access (CDMA) channels based on the large system analysis (LSA). Using the tools of LSA, a new decentralized power control algorithm aimed at energy efficiency maximization and requiring very little prior information on the interference background is proposed; moreover, it is also shown that LSA can be used to predict with good accuracy the performance and operational conditions of a large network operating at the equilibrium over a multipath channel, i.e. the power, signal-to-interference-plus-noise ratio (SINR) and utility profiles across users, wherein the utility is defined as the number of bits reliably delivered to the receiver for each energy-unit used for transmission. Additionally, an LSA-based performance comparison among linear receivers is carried out in terms of achieved energy efficiency at the equilibrium. Finally, the problem of the choice of the utility-maximizing tr...

Buzzi, Stefano; Poor, H Vincent

2008-01-01T23:59:59.000Z

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

An active-optic x-ray fluorescence analyzer with high energy resolution, large solid angle coverage, and a large tuning range  

SciTech Connect

A crystal-optic x-ray fluorescence energy analyzer has been designed and tested, which combines the features of electron-volt energy resolution, large solid angle coverage, and tunability over several kilo-electron-volts. The design is based upon the principle of active optics, with ten actuators available to optimally adjust the shape of a silicon crystal used in the Bragg geometry. In most applications the shape is that of a logarithmic spiral for high energy resolution with a spatially nonresolving detector, but a wide range of other shapes is also possible for applications such as imaging or single-shot spectroscopy in a spectral range of the operator's choosing.

Adams, Bernhard W.; Attenkofer, Klaus [Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2008-02-15T23:59:59.000Z

282

Ground state energy of large atoms in a self-generated magnetic field  

E-Print Network (OSTI)

We consider a large atom with nuclear charge $Z$ described by non-relativistic quantum mechanics with classical or quantized electromagnetic field. We prove that the absolute ground state energy, allowing for minimizing over all possible self-generated electromagnetic fields, is given by the non-magnetic Thomas-Fermi theory to leading order in the simultaneous $Z\\to \\infty$, $\\al\\to 0$ limit if $Z\\al^2\\leq \\kappa$ for some universal $\\kappa$, where $\\al$ is the fine structure constant.

Laszlo Erdos; Jan Philip Solovej

2009-03-10T23:59:59.000Z

283

Energy and critical ionic-bond parameter of a 3D large-radius bipolaron  

Science Conference Proceedings (OSTI)

A theory of a strong-coupling large-radius bipolaron has been developed. The possibility of the formation of 3D bipolarons in high-temperature superconductors is discussed. For the bipolaron energy, the lowest variational estimate has been obtained at {alpha} > 8, where {alpha} is the electron-phonon coupling constant. The critical ionic-bond parameter {eta}{sub c} = {epsilon}{sub {infinity}/{epsilon}0}, where {epsilon}{sub {infinity}} and {epsilon}{sub 0} are the high-frequency and static dielectric constants, has been found to be {eta}{sub c} = 0.2496.

Lakhno, V. D., E-mail: lak@impb.psn.r [Russian Academy of Sciences, Institute of Mathematical Problems of Biology (Russian Federation)

2010-05-15T23:59:59.000Z

284

Dijet asymmetry at the energies available at the CERN Large Hadron Collider  

SciTech Connect

The martini numerical simulation allows for direct comparison of theoretical model calculations and the latest results for dijet asymmetry from the ATLAS and CMS collaborations. In this paper, partons are simulated as undergoing radiative and collisional processes throughout the evolution of central lead-lead collisions at the Large Hadron Collider. Using hydrodynamical background evolution determined by a simulation which fits well with the data on charged particle multiplicities from ALICE and a value of {alpha}{sub s} {approx} 0.25-0.3, the dijet asymmetry is found to be consistent with partonic energy loss in a hot, strongly interacting medium.

Young, C.; Schenke, B.; Jean, S., Gale, C.

2011-08-15T23:59:59.000Z

285

United States Department of Energy large commercial absorption chiller development program  

Science Conference Proceedings (OSTI)

The US Department of Energy (DOE) is working with partners from the gas cooling industry to improve energy efficiency and US competitiveness by using advanced absorption technologies that eliminate the use of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), refrigerants that contribute to ozone depletion and global warming. Absorption cooling uses natural gas as the heat source, which produces much lower NO{sub x} emissions than oil- or coal-generated electricity. Gas-fired chillers also have the advantage of helping reduce peak electrical usage during summer months. To assist industry in developing advanced absorption cooling technologies, DOE sponsors the Large Commercial Chiller Development Program. The goal of the program is to improve chiller cooling efficiency by 30--50% compared with the best currently available absorption systems.

Garland, P.W.; DeVault, R.C.; Zaltash, A.

1998-11-01T23:59:59.000Z

286

EMCS and time-series energy data analysis in a large government office building  

SciTech Connect

Energy Management Control System (EMCS) data are an underutilized source of information on the performance of commercial buildings. Newer EMCS's have the ability and storage capacity to trend large amounts of data and perform preliminary analyses; however, these features often receive little or no use, as operators are generally not trained in data management, visualization, and analysis. Whole-building hourly electric-utility data are another readily available and underutilized source of information. This paper outlines the use of EMCS and utility data to evaluate the performance of the Ronald V. Dellums Federal Building in Oakland, California, a large office building operated by the Federal General Services Administration (GSA). The project began as an exploratory effort at Lawrence Berkeley National Laboratory (LBNL) to examine the procedures operators were using to obtain information and operate their buildings. Trending capabilities were available, but in limited use by the operators. LBNL worked with the building operators to use EMCS to trend one-minute data for over one-hundred points. Hourly electricity-use data were also used to understand usage patterns and peak demand. The paper describes LBNL's key findings in the following areas: Characterization of cooling plant operations; Characterization of economizer performance; Analysis of annual energy use and peak demand operations; Techniques, strengths, and shortcomings of EMCS data analysis; Future plans at the building for web-based remote monitoring and diagnostics. These findings have helped GSA develop strategies for peak demand reduction in this and other GSA buildings. Such activities are of great interest in California and elsewhere, where electricity reliability and demand are currently problematic. Overall, though the building's energy use is fairly low, significant energy savings are available by improving the existing EMCS control strategies.

Piette, Mary Ann; Kinney, Satkartar; Friedman, Hannah

2001-04-01T23:59:59.000Z

287

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

E-Print Network (OSTI)

than current models. As the market for wind energy grows, wind turbines and wind plants are becoming wind plants, reduce the cost of wind energy, and save wind plant developers millions of dollars in lostResearchers at the National Renewable Energy Laboratory (NREL) develop a high-fidelity large

288

In-Flight Measurement of the Absolute Energy Scale of the Fermi Large Area Telescope  

Science Conference Proceedings (OSTI)

The Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope is a pair-conversion telescope designed to survey the gamma-ray sky from 20 MeV to several hundreds of GeV. In this energy band there are no astronomical sources with sufficiently well known and sharp spectral features to allow an absolute calibration of the LAT energy scale. However, the geomagnetic cutoff in the cosmic ray electron-plus-positron (CRE) spectrum in low Earth orbit does provide such a spectral feature. The energy and spectral shape of this cutoff can be calculated with the aid of a numerical code tracing charged particles in the Earth's magnetic field. By comparing the cutoff value with that measured by the LAT in different geomagnetic positions, we have obtained several calibration points between {approx}6 and {approx}13 GeV with an estimated uncertainty of {approx}2%. An energy calibration with such high accuracy reduces the systematic uncertainty in LAT measurements of, for example, the spectral cutoff in the emission from gamma ray pulsars.

Ackermann, M.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Ajello, M.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Allafort, A.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Atwood, W.B.; /UC, Santa Cruz; Axelsson, M.; /Stockholm U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm; Baldini, L.; /INFN, Pisa; Barbiellini, G.; /INFN, Trieste /Trieste U.; Bastieri, D.; /INFN, Padua /Padua U.; Bechtol, K.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Bellazzini, R.; /INFN, Pisa; Berenji, B.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Bloom, E.D.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Bonamente, E.; /INFN, Perugia /Perugia U.; Borgland, A.W.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Bouvier, A.; /UC, Santa Cruz; Bregeon, J.; /INFN, Pisa; Brez, A.; /INFN, Pisa; Brigida, M.; /Bari Polytechnic /INFN, Bari; Bruel, P.; /Ecole Polytechnique; Buehler, R.; /Stanford U., HEPL /SLAC /KIPAC, Menlo Park; Buson, S.; /INFN, Padua /Padua U. /CSIC, Catalunya /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /IASF, Milan /DAPNIA, Saclay /INFN, Perugia /Perugia U. /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Unlisted, US /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /ASDC, Frascati /Perugia U. /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Montpellier U. /ASDC, Frascati /Bari Polytechnic /INFN, Bari /Naval Research Lab, Wash., D.C. /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Montpellier U. /Bari Polytechnic /INFN, Bari /Ecole Polytechnique /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Ecole Polytechnique /Hiroshima U. /Stanford U., HEPL /SLAC /KIPAC, Menlo Park /Bari Polytechnic /INFN, Bari /INFN, Bari /NASA, Goddard /INFN, Perugia /Perugia U.; /more authors..

2012-09-20T23:59:59.000Z

289

Potential markets for small coal-fired combustors in OECD countries: Country screening  

SciTech Connect

This report examines potential for use of US-developed advanced coal technology (ACT) for small combustor applications in foreign markets, in particular, the member countries of the Organization of Economic Co-operation and Development (OECD). After screening out OECD countries were evaluated on eight important factors favoring use of US ACT, including: the energy plan and/or situation; oil/gas import dependency; coal experience; residential/commercial energy demand; industrial energy demand; trade relations with the United States; lack of domestic competition in the country to US ACT manufacturers; and environmental pressure for use of advanced technology. Statistical and other information was gathered to support each country's rating---high, medium-high, low-medium, or low---for each factor. The country/factor ratings were then used to group the countries into categories indicating their relative potential as markets were found to exist in Spain, Italy, Turkey, Greece, and Canada. It was recommended that Spain, Italy, and Turkey be the subject of future studies, in which more detailed analysis will be made. 23 refs., 1 fig., 2 tabs.

1988-08-01T23:59:59.000Z

290

Development of a pressure gain combustor for improved cycle efficiency  

SciTech Connect

This paper presents results from an experimental research program attempting to improve the thermodynamic efficiencies of gas-turbine combustors. An elementary thermodynamic analysis shows that the thermodynamic cycle efficiencies of gas turbines can be significantly improved by using unsteady combustion that achieves quasi-constant-volume combustion. The ability to produce the so-called pressure gain via this process has already been demonstrated by others for pressures less than 3 atmospheres. This paper presents experimental results for pressures up to 11 atmospheres, compares certain process parameters to a numerical simulation, and briefly examines the problem of scale-up. Results of pollutant measurements over the 2--11 atmospheric range of operation are also included.

Gemmen, R.S.; Richards, G.A.; Janus, M.C.

1994-09-01T23:59:59.000Z

291

Nondestructive evaluation of environmental barrier coatings in CFCC combustor liners.  

SciTech Connect

Advanced combustor liners fabricated of SiC/SiC continuous fiber-reinforced ceramic composite (CFCC) and covered with environmental barrier coatings (EBCs) have been successfully tested in Solar Turbines Inc. field engines. The primary goal for the CFCC/EBC liners is to reach a 30,000-h lifetime. Because the EBCs, when applied on the hot surfaces of liners, protect the underlying CFCC from oxidation damage, their performance is critical in achieving the lifetime goal. To determine CFCC/EBC liner condition and assess operating damage, the liners were subjected to nondestructive evaluation (NDE) during various processing stages, as well as before and after the engine test. The NDE techniques included pulsed infrared thermal imaging, air-coupled ultrasonic scanning, and X-ray computerized tomography. It was found that EBC damage and spallation depend on the condition of the CFCC material. The NDE results and correlations with destructive examination are discussed.

Sun, J. G.; Benz, J.; Ellingson, W. A.; Kimmel, J. B.; Price, J. R.; Energy Technology; Solar Turbines, Inc

2007-01-01T23:59:59.000Z

292

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

293

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 several other large industrial power complexes. It is a PC-based supervisory system that is interfaced to a Distributed Control System (DCS). The EMS has been applied on powerhouse complexes as large as 433 MW of electricity and 7500 KPPH of steam. The EMS may, as required, include boiler load allocation, steam turbine load allocation, combustion turbine and HRSG load allocation, real-time pricing (RTP) tie-line control, coordinated header pressure control, bus voltage and plant power factor control and electric and steam economic load shed systems. It optimizes the powerhouse operations to meet rapidly changing steam and electrical requirements of the plant at minimum cost subject to all of the operating constraints imposed on the generation equipment. Steady state optimization methods, such as linear and non-linear programming, are not suited for on line optimization of power complex operations since the process is rarely in steady state. Instead, it is critical to control the trajectory of the power generation for optimal steam and electric moves while satisfying multiple constraints. The optimization strategy applied here is reduced to a fairly small number of prioritized rules. It has proven itself capable of optimizing large powerhouse complexes while keeping the powerhouse and process units within a safe operating envelop.

Gauthier, M.; Childress, R. L.

2001-05-01T23:59:59.000Z

294

Coal desulfurization in a rotary kiln combustor. Quarterly report No. 1, April 16, 1990--July 15, 1990  

Science Conference Proceedings (OSTI)

BCR National Laboratory (BCRNL) has initiated a project aimed at evaluating the technical and economic feasibility of using a rotary kiln, suitably modified, to burn Pennsylvania anthracite wastes, co-fired with high-sulfur bituminous coal. Limestone will be injected into the kiln for sulfur control, to determine whether high sulfur capture levels can be achieved with high sorbent utilization. The principal objectives of this work are: (1) to prove the feasibility of burning anthracite refuse, with co-firing of high-sulfur bituminous coal and with limestone injection for sulfur emissions control, in a rotary kiln fitted with a Universal Energy International (UEI) air injector system; (2) to determine the emissions levels of SO{sub x} and NO{sub x} and specifically to identify the Ca/S ratios that are required to meet New Source Performance Standards; (3) to evaluate the technical and economic merits of a commercial rotary kiln combustor in comparison to fluidized bed combustors; and, (4) to ascertain the need for further work, including additional combustion tests, prior to commercial application, and to recommend accordingly a detailed program towards this end.

Cobb, J.T. Jr.

1990-08-15T23:59:59.000Z

295

Microsoft Word - 41891_SWPC_Catalytic Combustor_Factsheet_Rev01_04-24.doc  

NLE Websites -- All DOE Office Websites (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

296

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

297

Microsoft Word - 41891_SWPC_Catalytic Combustor_Factsheet_Rev01...  

NLE Websites -- All DOE Office Websites (Extended Search)

COMBUSTORFACTSHEETREV0104-24.DOC Facts Sheet: Catalytic Combustor for Fuel Flexible Gas Turbine (DE-FC26-03NT41891) I. PROJECT PARTICIPANTS A. Siemens Westinghouse Power...

298

A physics-based emissions model for aircraft gas turbine combustors  

E-Print Network (OSTI)

In this thesis, a physics-based model of an aircraft gas turbine combustor is developed for predicting NO. and CO emissions. The objective of the model is to predict the emissions of current and potential future gas turbine ...

Allaire, Douglas L

2006-01-01T23:59:59.000Z

299

An Experimental Study of Flame Response Mechanisms in a Lean-premixed Gas Turbine Combustor.  

E-Print Network (OSTI)

??The heat release rate response of a swirl-stabilized, turbulent, lean-premixed natural gas-air flame to velocity oscillations was investigated in an atmospheric variable length research combustor… (more)

Peluso, Stephen

2012-01-01T23:59:59.000Z

300

Flame transfer function measurements and mechanisms in a single-nozzle combustor.  

E-Print Network (OSTI)

??The response of a fully-premixed flame to velocity fluctuations was experimentally measured in a single-nozzle, swirl-stabilized, model gas turbine combustor. Flame response was quantified in… (more)

Bunce, Nicholas

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large combustors energy" from the National Library of EnergyBeta (NLEBeta).
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301

Exposure of Ceramics and Ceramic Matrix Composites in Simulated and Actual Combustor Environments  

DOE Green Energy (OSTI)

A high-temperature, high-pressure, tube furnace has been used to evaluate the long term stability of different monolithic ceramic and ceramic matrix composite materials in a simulated combustor environment. All of the tests have been run at 150 psia, 1204 degrees C, and 15% steam in incremental 500 h runs. The major advantage of this system is the high sample throughput; >20 samples can be exposed in each tube at the same time under similar exposure conditions. Microstructural evaluations of the samples were conducted after each 500 h exposure to characterize the extent of surface damage, to calculate surface recession rates, and to determine degradation mechanisms for the different materials. The validity of this exposure rig for simulating real combustor environments was established by comparing materials exposed in the test rig and combustor liner materials exposed for similar times in an actual gas turbine combustor under commercial operating conditions.

Brentnall, W.D.; Ferber, M.K.; Keiser, j.R.; Miriyala, N.; More, K.L.; Price, J.R.; Tortorelli, P.F.; Walker, L.R.

1999-06-07T23:59:59.000Z

302

Overview of DOE's large stationary Stirling-engine development program  

SciTech Connect

This paper summarizes the results to date of a program, sponsored by DOE's Office of Fossil Energy, to develop large stationary Stirling engine power systems. Primary applications for such power plants include cogeneration and total energy systems, with a major advantage being their ability to employ solid coal and other non-scarce fuels in an environmentally acceptable manner. The greatest market potential is for individual engine modules in the 373 to 2238 kW range, which can be used in multiple-engine installations for cogeneration systems up to about 20 MWe. Fluidized bed coal combustors are found to be the most effective heat source for such power systems. The major effort in the Stirling engine development program was an industry-based design competition, involving three independent contractual teams. Conceptual designs for state-of-the-art coal-fired Stirling engine systems were developed and all three design teams recommended development of 373 kW modules as base units, which can be coupled together to form individual Stirling engines up to 2238 kW in size. Heat transport system design concepts were also developed for integrating engine hot-end sections with coal combustors, and a comparative discussion of the results is presented in the text of this paper.

Uherka, K.L.; Holtz, R.E.; Bunker, W.

1981-01-01T23:59:59.000Z

303

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

SciTech Connect

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

304

CFCC Development Program: commercial plant stacked combustor/steam generator design evaluation (Task 2. 1)  

SciTech Connect

The Coal Fired Combined Cycle (CFCC) is the unique power plant concept developed under the leadership of the General Electric Company to provide a direct coal-burning gas turbine and steam turbine combined cycle power plant. The advantages of the combined cycle for higher efficiency and the potential of the pressurized fluidized bed (PFB) combustor for improvements in emissions could offer a new and attractive option to the electric utility industry after its successful development. The CFCC approach provides cooling of the fluid bed combustor through the use of steam tubes in the bed, which supply a steam turbine-generator. The partially cooled combustion gases exiting from the combustor drive a gas turbine-generator after passing through a hot-gas cleanup train. On the basis of previous studies and confirming work under this contract, General Electric continues to believe that the CFCC approach offers these important advantages over alternate approaches: higher power plant efficiency in the combustor temperature range of interest; reduced combustor/steam generator corrosion potential, due to low fluid-bed tube temperature (as contrasted to the air in tube cycle); reduced hot-gas cleanup flow rate (as contrasted with the uncooled combustor cycle); and increased gas turbine bucket life through use of corrosion resistant material protection systems.

1978-06-01T23:59:59.000Z

305

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

SciTech Connect

The objective of this program is to develop a topping combustor to operate in a Second-Generation Pressurized Fluidized Bed (PFBC) Combined Cycle power generation system. The combustor must be able to: lightoff with a high heating value fuel and compressor discharge air to heat the fluidized bed(s) and provide power for PFBC and carbonizer off-line; operate with 1,600 F oxygen depleted air from the PFBC and high heating value fuel to handle carbonizer off-line conditions; ramp up to 100% carbonizer syngas firing (normal operation) by firing a blend of decreasing high heating value fuel and increasing low heating value syngas; utilize the vitiated air, at temperatures up to 1,600 F for as much cooling of the metal combustor as possible, thus minimizing the compressor bypass air needed for combustor cooling; provide an acceptance exit temperature pattern at the desired burner outlet temperature (BOT); minimize the conversion of fuel bound nitrogen (FBN) present in the syngas to NO{sub x}; and have acceptably high combustion efficiency, and low emissions of carbon monoxide, UHC, etc. This paper reports the results of tests of a 14 inch diameter topping combustor with a modified fuel-rich zone conducted in June 1993, design of an 18 inch diameter topping combustor to be tested in June 1994 and afterwards, and results of a 50% scale cold flow model which has been built and tested.

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

1994-10-01T23:59:59.000Z

306

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over Europe and its Intermittency  

E-Print Network (OSTI)

In times of increasing importance of wind power in the world’s energy mix, this study focuses on a better understanding of the influences of large-scale climate variability on wind power resource over Europe. The impact ...

Kriesche, Pascal

307

Solar total energy: large scale experiment, Shenandoah, Georgia Site. Annual report, June 1978-June 1979  

DOE Green Energy (OSTI)

A background summary and a complete description of the progress and current status of activities relative to the Cooperative Agreement for the Solar Total Energy - Large Scale Experiment at the Bleyle Knitwear Plant at Shenandoah, Georgia are presented. A statement of objectives and an abstract of progress to date are included. This is followed by a short introduction containing a project overview, a summary of the participants and their respective roles, a brief description of the Solar Total Energy System (STES) design concept, and a chronological summary of progress to date. A general description of the site is given, a detailed report of progress is reported, and drawings and equipment lists are included. The closed-loop solar energy system planned for Shenandoah begins with circulation of Syltherm 800, a heat transfer fluid of the Dow-Corning Corporation, through the receiver tubes of a parabolic dish solar collector field. As solar energy is focused on the receivers, the heat transfer fluid is heated to approximately 399/sup 0/C (750/sup 0/F) and is pumped to a heat exchanger for immediate use, or to a thermal storage system for later use. Once in the heat exchanger, the fluid heats a working fluid that produces the steam required for operating the turbine. After performing this task, the heat transfer fluid returns to the collectors to repeat the cycle, while the steam turbine-generator system supplies the electrical demands for the knitwear plant and the STES. During STES operation, maximum thermal and electrical requirements of the application are expected to be at 1.08 MWth and 161 kWe, respectively. During the power generation phase, some of the steam is extracted for use as process steam in the knitwear manufacturing process, while exhaust steam from the turbine is passed through a condenser to produce hot water for heating, domestic use, and absorption air conditioning. (WHK)

Ney, E.J.

1979-07-01T23:59:59.000Z

308

Energy Efficient Ventilation for Maintaining Indoor Air Quality in Large Buildings  

E-Print Network (OSTI)

this paper was presented at the 3rd International Conference on Cold Climate Heating, Ventilating and Air-conditioning, Sapporo, Japan, November 2000 C. Y. Shaw Rsum Institute for Research in Construction, National Research Council Canada Achieving good indoor air quality in large residential and commercial buildings continues to be a top priority for owners, designers, building managers and occupants alike. Large buildings present a greater challenge in this regard than do smaller buildings and houses. The challenge is greater today because there are many new materials, furnishings, products and processes used in these buildings that are potential sources of air contaminants. There are three strategies for achieving acceptable indoor air quality: ventilation (dilution), source control and air cleaning/filtration. Of the three, the most frequently used strategy, and in most cases the only one available to building operators, is ventilation. Ventilation is the process of supplying outdoor air to an enclosed space and removing stale air from this space. It can control the indoor air quality by both diluting the indoor air with less contaminated outdoor air and removing the indoor contaminants with the exhaust air. Ventilation costs money because the outdoor air needs to be heated in winter and cooled in summer. To conserve energy, care must be taken to maximize the efficiency of the ventilation system. In this regard, a number of factors come into play

C. Y. Shaw; C. Y. Shaw Résumé

2000-01-01T23:59:59.000Z

309

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

310

Large Scale Computing and Storage Requirements for Basic Energy Sciences Research  

E-Print Network (OSTI)

COMPUTING AND STORAGE REQUIREMENTS Basic Energy SciencesEnergy  Sciences   8.2.1.4   Computational  and  Storage  Computing  and  Storage  Requirements  for  Basic  Energy  

Gerber, Richard

2012-01-01T23:59:59.000Z

311

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

E-Print Network (OSTI)

23   Estimation of the Cost of Energy Efficiencyfunded cost-effective energy efficiency (EE) programs inEstimation of the Cost of Energy Efficiency Programs  Main

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

312

Greening and adaptation to energy efficiency in large scale public buildings in China.  

E-Print Network (OSTI)

??China, as one of the most vast energy demanding country, and coal is one of the most important primary energy source, therefore energy saving and… (more)

Junjie, Wang

2013-01-01T23:59:59.000Z

313

Industrial Gas Turbine Engine Catalytic Pilot Combustor-Prototype Testing  

SciTech Connect

PCI has developed and demonstrated its Rich Catalytic Lean-burn (RCL®) technology for industrial and utility gas turbines to meet DOEâ??s goals of low single digit emissions. The technology offers stable combustion with extended turndown allowing ultra-low emissions without the cost of exhaust after-treatment and further increasing overall efficiency (avoidance of after-treatment losses). The objective of the work was to develop and demonstrate emission benefits of the catalytic technology to meet strict emissions regulations. Two different applications of the RCL® concept were demonstrated: RCL® catalytic pilot and Full RCL®. The RCL® catalytic pilot was designed to replace the existing pilot (a typical source of high NOx production) in the existing Dry Low NOx (DLN) injector, providing benefit of catalytic combustion while minimizing engine modification. This report discusses the development and single injector and engine testing of a set of T70 injectors equipped with RCL® pilots for natural gas applications. The overall (catalytic pilot plus main injector) program NOx target of less than 5 ppm (corrected to 15% oxygen) was achieved in the T70 engine for the complete set of conditions with engine CO emissions less than 10 ppm. Combustor acoustics were low (at or below 0.1 psi RMS) during testing. The RCL® catalytic pilot supported engine startup and shutdown process without major modification of existing engine controls. During high pressure testing, the catalytic pilot showed no incidence of flashback or autoignition while operating over a wide range of flame temperatures. In applications where lower NOx production is required (i.e. less than 3 ppm), in parallel, a Full RCL® combustor was developed that replaces the existing DLN injector providing potential for maximum emissions reduction. This concept was tested at industrial gas turbine conditions in a Solar Turbines, Incorporated high-pressure (17 atm.) combustion rig and in a modified Solar Turbines, Incorporated Saturn engine rig. High pressure single-injector rig and modified engine rig tests demonstrated NOx less than 2 ppm and CO less than 10 ppm over a wide flame temperature operating regime with low combustion noise (<0.15% peak-to-peak). Minimum NOx for the optimized engine retrofit Full RCL® designs was less than 1 ppm with CO emissions less than 10 ppm. Durability testing of the substrate and catalyst material was successfully demonstrated at pressure and temperature showing long term stable performance of the catalytic reactor element. Stable performance of the reactor element was achieved when subjected to durability tests (>5000 hours) at simulated engine conditions (P=15 atm, Tin=400C/750F.). Cyclic tests simulating engine trips was also demonstrated for catalyst reliability. In addition to catalyst tests, substrate oxidation testing was also performed for downselected substrate candidates for over 25,000 hours. At the end of the program, an RCL® catalytic pilot system has been developed and demonstrated to produce NOx emissions of less than 3 ppm (corrected to 15% O2) for 100% and 50% load operation in a production engine operating on natural gas. In addition, a Full RCL® combustor has been designed and demonstrated less than 2 ppm NOx (with potential to achieve 1 ppm) in single injector and modified engine testing. The catalyst/substrate combination has been shown to be stable up to 5500 hrs in simulated engine conditions.

Shahrokh Etemad; Benjamin Baird; Sandeep Alavandi; William Pfefferle

2009-09-30T23:59:59.000Z

314

Implementation of an Integrated Energy Information System in a Large University Campus  

E-Print Network (OSTI)

This paper describes the design, installation and implementation of an integrated energy information system at the central plant, auxiliary utility plants, and selected buildings at the University of New Mexico in Albuquerque. The Comprehensive Integrated Metering and Monitoring System (CIMMS) at the University of New Mexico collects electricity, natural gas, chilled water and steam energy consumption and production data. The CIMMS project was implemented to develop baseline energy consumption measurements and provide the ability to evaluate and improve energy system performance through data analysis and control systems. Prior to implementation of CIMMS, the campus had only two main electric meters and no way to collect detailed steam, chilled water or natural gas consumption data. CIMMS was implemented by Square D in association with New Horizon Technologies and the Energy Systems Laboratory at Texas A&M University. As installed, CIMMS included 28 Square D Power Logic Circuit Monitors with on-board data logging, true RMS metering, ANSI C12.16 revenue accuracy, sag/swell and harmonic power quality analysis and field installable modules for Ethernet, on-board alarming and programmable logic. The system also included six Power Logic Power Meters and System Manager Software (SMS). Another key element of CIMMS is the integration of mechanical metering. Twenty Modicon Momentum Programmable Logic Controllers were networked with the Circuit monitors and collect more than 120 thermal energy data points from utility natural gas meters and campus natural gas, steam and chilled water sub-meters. Square D's SMS is the primary communication and data collection software that is used for integrating MODBUS devices, uploading onboard logs, storing historical data logs and pictorially displaying real-time data. EnerTel® software, developed by eComponents Technology, Inc., overlays the SMS database to create historical data views, load profiles, utility cost estimates and custom reports. The CIMMS software generates numerous automated custom reports including a campus energy balance with electricity, steam and chilled water subsystems, steam and chilled water production and consumption reports and individual facility or building energy production and consumption reports. This paper will focus on the design, installation and implementation challenges associated with a large, state-of-the-art energy information system. Key aspects of CIMMS that will be highlighted in this paper include the following: •Turn-key project ownership •Proven technology (Commercial, Off-the-Shelf) •Industry standard, open system network protocols •Reliance on the existing campus Ethernet TCP/IP backbone fiber optic network •Requirement of 48 hours of on-board data-logging capability at the device level to provide security from network disruption •Integration of legacy electronic Watt metering equipment into CIMMS •Extensive data analysis and reporting software requirements •Capability for integration with future building automation system (BAS).

McBride, J. R.; Schuster, L.; Rickey, D.

2003-05-01T23:59:59.000Z

315

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

SciTech Connect

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

316

Impact of the Vertical Resolution of Analysis Data on the Estimates of Large-Scale Inertio-Gravity Energy  

Science Conference Proceedings (OSTI)

This paper deals with the large-scale inertio-gravity (IG) wave energy in the operational ECMWF analyses in July 2007. Energy percentages of the IG waves obtained from the standard-pressure-level data are compared to those derived from various ...

Nedjeljka Žagar; Koji Terasaki; Hiroshi L. Tanaka

2012-07-01T23:59:59.000Z

317

Large Scale Computing and Storage Requirements for Basic Energy Sciences Research  

SciTech Connect

The National Energy Research Scientific Computing Center (NERSC) is the leading scientific computing facility supporting research within the Department of Energy's Office of Science. NERSC provides high-performance computing (HPC) resources to approximately 4,000 researchers working on about 400 projects. In addition to hosting large-scale computing facilities, NERSC provides the support and expertise scientists need to effectively and efficiently use HPC systems. In February 2010, NERSC, DOE's Office of Advanced Scientific Computing Research (ASCR) and DOE's Office of Basic Energy Sciences (BES) held a workshop to characterize HPC requirements for BES research through 2013. The workshop was part of NERSC's legacy of anticipating users future needs and deploying the necessary resources to meet these demands. Workshop participants reached a consensus on several key findings, in addition to achieving the workshop's goal of collecting and characterizing computing requirements. The key requirements for scientists conducting research in BES are: (1) Larger allocations of computational resources; (2) Continued support for standard application software packages; (3) Adequate job turnaround time and throughput; and (4) Guidance and support for using future computer architectures. This report expands upon these key points and presents others. Several 'case studies' are included as significant representative samples of the needs of science teams within BES. Research teams scientific goals, computational methods of solution, current and 2013 computing requirements, and special software and support needs are summarized in these case studies. Also included are researchers strategies for computing in the highly parallel, 'multi-core' environment that is expected to dominate HPC architectures over the next few years. NERSC has strategic plans and initiatives already underway that address key workshop findings. This report includes a brief summary of those relevant to issues raised by researchers at the workshop.

Gerber, Richard; Wasserman, Harvey

2011-03-31T23:59:59.000Z

318

Large Scale Computing and Storage Requirements for Basic Energy Sciences Research  

SciTech Connect

The National Energy Research Scientific Computing Center (NERSC) is the leading scientific computing facility supporting research within the Department of Energy's Office of Science. NERSC provides high-performance computing (HPC) resources to approximately 4,000 researchers working on about 400 projects. In addition to hosting large-scale computing facilities, NERSC provides the support and expertise scientists need to effectively and efficiently use HPC systems. In February 2010, NERSC, DOE's Office of Advanced Scientific Computing Research (ASCR) and DOE's Office of Basic Energy Sciences (BES) held a workshop to characterize HPC requirements for BES research through 2013. The workshop was part of NERSC's legacy of anticipating users future needs and deploying the necessary resources to meet these demands. Workshop participants reached a consensus on several key findings, in addition to achieving the workshop's goal of collecting and characterizing computing requirements. The key requirements for scientists conducting research in BES are: (1) Larger allocations of computational resources; (2) Continued support for standard application software packages; (3) Adequate job turnaround time and throughput; and (4) Guidance and support for using future computer architectures. This report expands upon these key points and presents others. Several 'case studies' are included as significant representative samples of the needs of science teams within BES. Research teams scientific goals, computational methods of solution, current and 2013 computing requirements, and special software and support needs are summarized in these case studies. Also included are researchers strategies for computing in the highly parallel, 'multi-core' environment that is expected to dominate HPC architectures over the next few years. NERSC has strategic plans and initiatives already underway that address key workshop findings. This report includes a brief summary of those relevant to issues raised by researchers at the workshop.

Gerber, Richard; Wasserman, Harvey

2011-03-31T23:59:59.000Z

319

Tavicha’impimu: To Catch the Sun: Large Scale Solar Energy Development in the Great Basin and the Cultural Implications for Numic-Speaking Peoples.  

E-Print Network (OSTI)

??The United States government is considering areas in the five states for the large-scale solar energy development. These solar energy zones (SEZs) contain important Native… (more)

Van Vlack, Kathleen A.

2013-01-01T23:59:59.000Z

320

EMCS and time-series energy data analysis in a large government office building  

E-Print Network (OSTI)

and Renewable Energy, Office of Building Technology, State andand Renewable Energy, Office of Building Technology, State and

Piette, Mary Ann; Kinney, Satkartar; Friedman, Hannah

2001-01-01T23:59:59.000Z

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.


321

Search for large extra dimensions in the exclusive photon + missing energy channel in p anti-p collisions  

SciTech Connect

A search was conducted for evidence of large extra dimensions (LED) at Fermi National Accelerator Laboratory's Tevatron using the D0 detector. The Tevatron is a p{bar p} collider at a center of mass energy of 1.96 TeV. Events with particles escaping into extra dimensions will have large missing energy. The search was carried out using data from a total luminosity of 197 {+-} 13 pb{sup -1} with an observable high transverse momentum photon and a large transverse missing energy. The 70 observed events are consistent with photons produced by standard known reactions plus other background processes produced by cosmic muons. The mass limits on the fundamental mass scale at 95% confidence level for large extra dimensions of 2, 4, 6 and 8 are 500 GeV, 581 GeV, 630 GeV, and 668 GeV respectively.

Lazoflores, Jose A.; /Florida State U.

2006-04-01T23:59:59.000Z

322

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

Science Conference Proceedings (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

323

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

324

ANTARES proposal: Towards a large scale high energy cosmic neutrino undersea detector  

E-Print Network (OSTI)

The ANTARES collaboration propose to observe High Energy Cosmic Neutrinos using a Deep Sea Cherenkov detector. The sky survey with high energy neutrinos is complementary to the observations with photons. It is expected that this will shed a new light on the understanding of the origin of cosmics rays, on galactic and extra galactic sources. In this document, we will elaborate on the potential interest of such a study for Astrophysicists and Particle Physicists. For Oceanologists participating in the collaboration, the main goal is a long term measurement of environmental parameters in the deep sea. We propose to explore the possibility of a km-scale detector to be installed in a deep site in the Mediterranean sea, for which a broad collaboration will be needed. A variety of technical problems have to be solved. Strong constraints coming from the deep sea environment and the lack of accessibility, require sea science engineering expertise. For items such as detector deployment in deep water, data transmission through optical cables, corrosion, bio-fouling of optical modules, positioning, we have found technical support from collaborators and partners which have experience in this field (COM, CSTN, CTME, IFREMER, France Telecom Cables, INSU-CNRS...). We will test the sea engineering part of a detector including test deployments close to the Toulon coast (France) where technical support is available and where several sites at depths down to 2500 m are easily accessible. During the same time, issues connected to the accomplishment of a large scale detector and the selection of an optimum site will be addressed. We propose to build and install a demonstrator (a fully equipped 3-dimensional test array) the design of which can be extended to a km^3 scale detector. We plan to reach this goal within the next 2 years.

ANTARES collaboration

1997-07-11T23:59:59.000Z

325

Determine energy-saving potential in wait-states of large-scale parallel programs  

Science Conference Proceedings (OSTI)

Energy consumption is one of the major topics in high performance computing (HPC) in the last years. However, little effort is put into energy analysis by developers of HPC applications.We present our approach of combined performance and energy analysis ... Keywords: Analysis, Energy, Energy efficiency, MPI, Performance, Power consumption, Scalasca

Michael Knobloch; Bernd Mohr; Timo Minartz

2012-11-01T23:59:59.000Z

326

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network (OSTI)

Energy  Sciences   8.2.3.4   Computational  and  Storage  Energy  Sciences   13.1.1.4   Computational  and  Storage  Energy  Sciences   8.2.4.4   Computational  and  Storage  

Gerber, Richard

2012-01-01T23:59:59.000Z

327

ttbar+large missing energy from top-quark partners: a comprehensive study at NLO QCD  

E-Print Network (OSTI)

We perform a detailed study of top-quark partner production in the ttbar plus large missing energy final-state at the LHC, presenting results for both scalar and fermionic top-quark partners in the semi-leptonic and dileptonic decay modes of the top quarks. We compare the results of several simulation tools: leading-order matrix elements, next-to-leading order matrix elements, leading-order plus parton shower simulations, and merged samples that contain the signal process with an additional hard jet radiated. We find that predictions from leading-order plus parton shower simulations can significantly deviate from NLO QCD or LO merged samples and do not correctly model the kinematics of the ttbar + ETmiss signature. They are therefore not a good framework for modeling this new physics signature. On the other hand, the acceptances obtained with a merged sample of the leading-order process together with the radiation of an additional hard jet are in agreement with the NLO predictions. We also demonstrate that the scale variation of the inclusive cross section, plus that of the acceptance, does not accurately reflect the uncertainty of the cross section after cuts, which is typically larger. We show the importance of including higher-order QCD corrections when using kinematic distributions to determine the spin of the top-quark partner.

Radja Boughezal; Markus Schulze

2013-09-09T23:59:59.000Z

328

Second-generation PFBC systems research and development, Phase 2 topping combustor development  

SciTech Connect

The use of a Circulating Pressurized Fluidized Bed Combustor (CPFBC) as the primary combustion system for a combustion turbine requires transporting compressor air to the CPFBC and vitiated air/fuel gas back to the turbine. In addition, the topping combustion system must be located in the returning vitiated airflow path. The conventional fuel system and turbine center section require major changes for the applications. The combustion zone of the Westinghouse 501F turbine currently in production cannot contain the topping combustion system within the main structural pressure shell. Although the pressure casing can be enlarged both radially and longitudinally to accommodate the topping combustor system, the integrity and rigidity of the main shell would be significantly affected and, it could introduce rotor dynamics problems and preclude shipping the unit assembled. The currently favored configuration, which utilizes two topping combustor assemblies, one on each side of the unit, is shown in Figure 1. Half of the vitiated air from the CPFBC enters each of the internal plenum chambers in which the topping combustors are mounted. Fuel gas enters the assembly via the fuel nozzles at the head end of the combustor. Combustion occurs, and the products of combustion are ducted into the main shell for distribution to the first-stage turbine vanes. Compressor discharge air leaves the main shell, flowing around the annular duct into adjacent combustion shells. The air flows around the vitiated air plenums and leaves each combustion assembly via nozzles and is ducted to the CPFBC and carbonizer.

Domeracki, W.F.; Dowdy, T.E.; Bachovchin, D.; Foote, J.; Pillsbury, P.W.; Bouvier, B.U.; Muller, K.F.

1993-09-01T23:59:59.000Z

329

Cold flow modeling of pulverized coal combustors for magnetohydrodynamic channel applications  

DOE Green Energy (OSTI)

This report describes an experimental program and techniques for studying the internal aerodynamics of pulverized coal combustors of the type used in magnetohydrodynamic test trains at The University of Tennessee Space Institute. The combustors are modeled with small scale, cold flow models that permit both flow visualization and velocity field surveys to be performed. Water was selected as the working fluid so that the model flow fields had the same Reynolds number as the actual reactive combustors, and also to facilitate flow visualization. The systems used for flow visualization and velocity field surveying are described in detail. The velocity field survey equipment is based on a vector-velocity, laser doppler velocimeter coupled to a controllable field scanning device and a microprocessor for on-line data reduction. Results are presented that were obtained from a laser velocimeter study of recirculating flows in a combustor model. The results show that, even for exceedingly simple geometrical arrangements of oxidant injector configurations, complex three dimensional highly turbulent flow fields exist in the combustor. A brief discussion of the impact of the results on fuel injector positioning is presented.

Schulz, R.J.; Giel, T.V.; Ghosh, A.; Morris, R.D.

1984-03-01T23:59:59.000Z

330

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

E-Print Network (OSTI)

Scale Energy Efficiency Programs On Consumer Tariffs andtariffs of implementing utility-funded cost-effective energyaverage tariff depends on the percentage reduction in energy

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

331

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

SciTech Connect

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

332

What Large Purchases or Improvements Have You Made to Save Energy...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Related Articles Looking for ways to save energy? Check out these tips that every homeowner should try. | Infographic by Sarah Gerrity, Energy Department. Resolve to Save...

333

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

E-Print Network (OSTI)

A special Energy-Efficiency Plan, for medium and long-term periods, was brought forward by the National Development and Reform Commission of China in 2005. Energy efficiency in buildings is highly emphasized in this energy planning. The Ministry of Finance, together with the Ministry of Construction P.R.C, is selecting cities with different climates to carry out demonstrations of renewable energy applications in buildings. Xi'an, a representative city in the West, is selected to demonstrate large-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 is also investigated. If this project is completed, the successful experience with respect to the solar energy application in Xi'an will be disseminated in the northwest regions of China. It is expected, after completion of this project, that design methods, procedures and installment of solar energy applications in residential buildings in Xi'an will be obtained.

Li, A.; Liu, Y.

2006-01-01T23:59:59.000Z

334

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

Science Conference Proceedings (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

335

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage  

SciTech Connect

Large-scale energy storage represents a key challenge for renewable energy and new systems with low cost, high energy density and long cycle life are desired. In this article, we develop a new lithium/polysulfide (Li/PS) semi-liquid battery for large-scale energy storage, with lithium polysulfide (Li{sub 2}S{sub 8}) in ether solvent as a catholyte and metallic lithium as an anode. Unlike previous work on Li/S batteries with discharge products such as solid state Li{sub 2}S{sub 2} and Li{sub 2}S, the catholyte is designed to cycle only in the range between sulfur and Li{sub 2}S{sub 4}. Consequently all detrimental effects due to the formation and volume expansion of solid Li{sub 2}S{sub 2}/Li{sub 2}S are avoided. This novel strategy results in excellent cycle life and compatibility with flow battery design. The proof-of-concept Li/PS battery could reach a high energy density of 170 W h kg{sup -1} and 190 W h L{sup -1} for large scale storage at the solubility limit, while keeping the advantages of hybrid flow batteries. We demonstrated that, with a 5 M Li{sub 2}S{sub 8} catholyte, energy densities of 97 W h kg{sup -1}) and 108 W h L{sup -1} can be achieved. As the lithium surface is well passivated by LiNO{sub 3} additive in ether solvent, internal shuttle effect is largely eliminated and thus excellent performance over 2000 cycles is achieved with a constant capacity of 200 mA h g{sup -1}. This new system can operate without the expensive ion-selective membrane, and it is attractive for large-scale energy storage.

Yang, Yuan; Zheng, Guangyuan; Cui, Yi

2013-01-01T23:59:59.000Z

336

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage  

SciTech Connect

Large-scale energy storage represents a key challenge for renewable energy and new systems with low cost, high energy density and long cycle life are desired. In this article, we develop a new lithium/polysulfide (Li/PS) semi-liquid battery for large-scale energy storage, with lithium polysulfide (Li{sub 2}S{sub 8}) in ether solvent as a catholyte and metallic lithium as an anode. Unlike previous work on Li/S batteries with discharge products such as solid state Li{sub 2}S{sub 2} and Li{sub 2}S, the catholyte is designed to cycle only in the range between sulfur and Li{sub 2}S{sub 4}. Consequently all detrimental effects due to the formation and volume expansion of solid Li{sub 2}S{sub 2}/Li{sub 2}S are avoided. This novel strategy results in excellent cycle life and compatibility with flow battery design. The proof-of-concept Li/PS battery could reach a high energy density of 170 W h kg{sup -1} and 190 W h L{sup -1} for large scale storage at the solubility limit, while keeping the advantages of hybrid flow batteries. We demonstrated that, with a 5 M Li{sub 2}S{sub 8} catholyte, energy densities of 97 W h kg{sup -1} and 108 W h L{sup -1} can be achieved. As the lithium surface is well passivated by LiNO{sub 3} additive in ether solvent, internal shuttle effect is largely eliminated and thus excellent performance over 2000 cycles is achieved with a constant capacity of 200 mA h g{sup -1}. This new system can operate without the expensive ion-selective membrane, and it is attractive for large-scale energy storage.

Yang, Yuan; Zheng, Guangyuan; Cui, Yi

2013-01-01T23:59:59.000Z

337

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

NLE Websites -- All DOE Office Websites (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

338

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

SciTech Connect

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

339

Combustion Control and Diagnostics Sensor Testing in a Thermal Barrier Coated Combustor  

Science Conference Proceedings (OSTI)

The combustion control and diagnostics sensor (CCADS) continues to be developed as an in-situ combustion sensor, with immediate application to natural gas fired turbines. In-situ combustion monitoring is also expected to benefit advanced power plants of the future, fueled by coal-derived syngas, liquified natural gas (LNG), hydrogen, or hydrogen blend fuels. The in-situ monitoring that CCADS provides can enable the optimal operation of advanced, fuel-flexible turbines for minimal pollutant emissions and maximum efficiency over the full operating range of an advanced turbine. Previous work has demonstrated CCADS as a useful sensor for in-situ monitoring of natural gas combustion, including detection of important combustion events such as flashback and lean blowoff, in experimental combustors without thermal barrier coatings (TBC). Since typical TBC materials are electrical insulators at room temperature, and CCADS operation requires conduction of electrical current to the walls of the combustor, a TBC on the combustion liner was identified as a potential barrier to CCADS operation in commercial application. This paper reports on CCADS experiments in a turbulent lean premixed combustor with a yttria-stabilized zirconia (YSZ) thermal barrier coating on the combustor wall. The tests were conducted at 0.1 MPa (1 atm), with a 15V excitation voltage on the CCADS electrodes. The results confirm that for a typical thermal barrier coating, CCADS operates properly, and the total measured average resistance is close to that of an uncoated combustor. This result is consistent with previous materials studies that found the electrical resistance of typical TBC materials considerably decreases at combustor operating temperatures.

Chorpening, B.T.; Dukes, M.G.; Robey, E.H.; Thornton, J.D.

2007-05-01T23:59:59.000Z

340

Development of an advanced high efficiency coal combustor for boiler retrofit. Summary report  

Science Conference Proceedings (OSTI)

The objective of the program was to develop an advanced coal combustion system for firing beneficiated coal fuels (BCFs) capable of being retrofitted to industrial boilers originally designed for firing natural gas. The High Efficiency Advanced Coal Combustor system is capable of firing microfine coal-water fuel (MCWF), MCWF with alkali sorbent (for SO{sub 2} reduction), and dry microfine coal. Design priorities for the system were that it be simple to operate and offer significant reductions in NO{sub x}, SO{sub x}, and particulate emissions as compared with current coal-fired combustor technology. (VC)

LaFlesh, R.C.; Rini, M.J.; McGowan, J.G.; Beer, J.M.; Toqan, M.A.

1990-04-01T23:59:59.000Z

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.


341

Development of an advanced high efficiency coal combustor for boiler retrofit  

Science Conference Proceedings (OSTI)

The objective of the program was to develop an advanced coal combustion system for firing beneficiated coal fuels (BCFs) capable of being retrofitted to industrial boilers originally designed for firing natural gas. The High Efficiency Advanced Coal Combustor system is capable of firing microfine coal-water fuel (MCWF), MCWF with alkali sorbent (for SO{sub 2} reduction), and dry microfine coal. Design priorities for the system were that it be simple to operate and offer significant reductions in NO{sub x}, SO{sub x}, and particulate emissions as compared with current coal-fired combustor technology. (VC)

LaFlesh, R.C.; Rini, M.J.; McGowan, J.G.; Beer, J.M.; Toqan, M.A.

1990-04-01T23:59:59.000Z

342

Apparatus and filtering systems relating to combustors in combustion turbine engines  

DOE Patents (OSTI)

A combustor for a combustion turbine engine, the combustor that includes: a chamber defined by an outer wall and forming a channel between windows defined through the outer wall toward a forward end of the chamber and at least one fuel injector positioned toward an aft end of the chamber; a screen; and a standoff comprising a raised area on an outer surface of the outer wall near the periphery of the windows; wherein the screen extends over the windows and is supported by the standoff in a raised position in relation to the outer surface of the outer wall and the windows.

Johnson, Thomas Edward (Greer, SC); Zuo, Baifang (Simpsonville, SC); Stevenson, Christian Xavier (Inman, SC)

2012-07-24T23:59:59.000Z

343

Accuracy of Estimates of Atmospheric Large-Scale Energy Flux Divergence  

Science Conference Proceedings (OSTI)

A short review of atmospheric energy transport studies is given, and the importance of the Global Weather Experiment for such studies is emphasized. The accuracy of energy flux (divergence) estimates is then discussed, comparing results obtained ...

Eero Holopainen; Carl Fortelius

1986-10-01T23:59:59.000Z

344

A study of Baroclinic Energy Sources for Large-Scale Atmospheric Normal Modes  

Science Conference Proceedings (OSTI)

Observed atmospheric energy peaks in a three-dimensional (3-D) spectral domain are compared with energy peaks predicted by the theory of atmospheric baroclinic instability. The 3-D scale index for global-scale atmospheric motions is represented ...

H. L. Tanaka; Shaojian Sun

1990-11-01T23:59:59.000Z

345

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

346

Large-Scale Energy Transformations in the High Latitudes of the Northern Hemisphere  

Science Conference Proceedings (OSTI)

The kinetic energy balance and kinetic energy source are studied for high latitudes north of 55°N with twice daily upper air observations during a seven-year period from 1973 to 1979. Energy variables are presented for 5° latitudinal zones from ...

E. C. Kung; S. E. Masters; J. A. M. Corte-Real

1983-05-01T23:59:59.000Z

347

How large are U.S. coal reserves? - FAQ - U.S. Energy ...  

U.S. Energy Information Administration (EIA)

How large are U.S. coal reserves? There are three separate components for U.S. coal reserves. Recoverable reserves; Demonstrated reserve base; ...

348

Abstract--The use of doubly fed induction generators (DFIGs) in large wind energy conversion systems (WECS) has  

E-Print Network (OSTI)

1 Abstract--The use of doubly fed induction generators (DFIGs) in large wind energy conversion systems (WECS) has significantly increased during the last few years. The DFIG is interfaced to the AC to the AC grid during disturbances. The sensitivity of DFIGs to external faults has motivated researchers

Pota, Himanshu Roy

349

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

SciTech Connect

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

350

User's manual for computer code SOLTES-1 (simulator of large thermal energy systems). [For CDC 6600  

DOE Green Energy (OSTI)

SOLTES simulates the steady-state response of thermal energy systems to time-varying data such as weather and loads. Thermal energy system models of both simple and complex systems can easily be modularly constructed from a library of routines. These routines mathematically model solar collectors, pumps, switches, thermal energy storage, thermal boilers, auxiliary boilers, heat exchangers, extraction turbines, extraction turbine/generators, condensers, regenerative heaters, air conditioners, heating and cooling of buildings, process vapor, etc.; SOLTES also allows user-supplied routines. The analyst need only specify fluid names to obtain readout of property data for heat-transfer fluids and constants that characterize power-cycle working fluids from a fluid property data bank. A load management capability allows SOLTES to simulate total energy systems that simultaneously follow heat and power loads and demands. Generalized energy accounting is available, and values for system performance parameters may be automatically determined by SOLTES. Because of its modularity and flexibility, SOLTES can be used to simulate a wide variety of thermal energy systems such as solar power/total energy, fossil fuel power plants/total energy, nuclear power plants/total energy, solar energy heating and cooling, geothermal energy, and solar hot water heaters.

Fewell, M.E.; Grandjean, N.R.; Dunn, J.C.; Edenburn, M.W.

1978-09-01T23:59:59.000Z

351

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

352

An electron energy loss spectrometer designed for studies of electronic energy losses and spin waves in the large momentum regime  

Science Conference Proceedings (OSTI)

Based on 143 deg. electrostatic deflectors we have realized a new spectrometer for electron energy loss spectroscopy which is particularly suitable for studies on surface spin waves and other low energy electronic energy losses. Contrary to previous designs high resolution is maintained even for diffuse inelastic scattering due to a specific management of the angular aberrations in combination with an angle aperture. The performance of the instrument is demonstrated with high resolution energy loss spectra of surface spin waves on a cobalt film deposited on the Cu(100) surface.

Ibach, H. [Peter Gruenberg Institut PGI-3, Forschungszentrum Juelich, 52425 Juelich (Germany); Juelich Aachen Research Alliance - Fundamentals of Future Information Technologies (JARA-FIT), 52425 Juelich (Germany); Rajeswari, J.; Schneider, C. M. [Peter Gruenberg Institut PGI-6, Forschungszentrum Juelich, 52425 Juelich (Germany); Juelich Aachen Research Alliance - Fundamentals of Future Information Technologies (JARA-FIT), 52425 Juelich (Germany)

2011-12-15T23:59:59.000Z

353

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)

As the energy costs have been increasing the more energy efficient measures have been promoted in the buildings sector, the reliability of energy consumption data has been attracting significant attention. For example, the reliability of the determination of energy savings depends on that of the energy consumption data, which has to be verified before and after any efficiency measure is applied. From other perspective, verifying energy use data on a regular basis would 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 been applied to a large university campus where the monthly energy consumption, of approximately 100 buildings, must be verified. One of the main responsibilities of the Energy Management Office of the university is to provide monthly utility consumption and cost information to accounting for utility billing of individual buildings. The methodology, which is based on the first law of thermodynamics, or energy conservation, has proved to be an effective data quality screening method for verification of metering sensors when heating, cooling and electricity consumption are separately metered in a building. The methodology is anticipated to be suitable for automated application. In some cases, the methodology could also help to rehabilitate energy use data.

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

354

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

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Efficiency Program and Market Trends High Technology and Industrial Buildings Lighting Systems Residential Buildings Simulation Tools Sustainable Federal Operations Windows...

355

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

NLE Websites -- All DOE Office Websites (Extended Search)

cases are considered for business or other justified reasons. Elevators. The RSF employs energy-efficient regenerative traction elevators rather than the standard hydraulic...

356

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)

[No author

2009-01-01T23:59:59.000Z

357

Approaches to energy efficiency in China’s large-scale public building.  

E-Print Network (OSTI)

?? In recent years, the energy shortage has become a barrier to social development as there is a shortage of resources, especially non-renewable resources. In… (more)

Yu, Wenhe

2010-01-01T23:59:59.000Z

358

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 +

359

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

E-Print Network (OSTI)

and are added to the utility’s rate base. Large-scale EE2009a, 2009b, 2009c). utility’s rate base, and the utilityto the grid at a higher rate if the utility does not face

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

360

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

E-Print Network (OSTI)

as sources of low-cost baseload power. 4.6.3 Large­Scale EE b is the variable cost of baseload power purchases, and L isbut simply avoids baseload power purchases. Utilities that

Abhyankar, Nikit

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.


361

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 +

362

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 +

363

Development of the GE Quiet Combustor and Other Design Changes to Benefit Air Quality  

E-Print Network (OSTI)

The attractiveness of gas turbines in cogeneration facilities and combined-cycle (Brayton-Rankine) power plants is linked to high specific work; power per unit mass flow. Manufacturers have, over the years, increased gas turbine firing temperature to increase specific work, hence combined-cycle efficiency. High firing temperatures, insofar as they are related to high adiabatic stoichiometric flame temperatures, have brought higher NOx emissions along with high efficiency. Furthermore, efforts to combat smoke have also driven flame temperatures higher. As combustors evolved to produce higher firing temperatures, and design matured in order to lower smoke emissions and control these NOx emissions, dynamic pressure oscillation activity within the combustor, noise, has increased; increasing wear and necessitating more frequent maintenance. Many different concepts were built and tested as described in this paper and others are in research. At this point, the staged combustor operates in the lean/lean and premixed modes and the multi-nozzle quiet combustor operating with diluent injection offer more immediate prospects for achieving the NOx levels demanded today with natural gas and distillate oils.

Miller, H. E.

1988-09-01T23:59:59.000Z

364

DEVELOPMENT OF A HYDROGEN COMBUSTOR FOR A MICROFABRICATED GAS TURBINE ENGINE  

E-Print Network (OSTI)

DEVELOPMENT OF A HYDROGEN COMBUSTOR FOR A MICROFABRICATED GAS TURBINE ENGINE A. Mehra, I. A. Waitz Gas Turbine Laboratory, Department of Aeronautics and Astronautics Massachusetts Institute, a program is underway to fabricate a gas turbine engine capable of producing 50W of electrical power

Waitz, Ian A.

365

Fuel injection staged sectoral combustor for burning low-BTU fuel gas  

SciTech Connect

A high-temperature combustor for burning low-BTU coal gas in a gas turbine is described. The combustor comprises a plurality of individual combustor chambers. Each combustor chamber has a main burning zone and a pilot burning zone. A pipe for the low-BTU coal gas is connected to the upstream end of the pilot burning zone; this pipe surrounds a liquid fuel source and is in turn surrounded by an air supply pipe; swirling means are provided between the liquid fuel source and the coal gas pipe and between the gas pipe and the air pipe. Additional preheated air is provided by counter-current coolant air in passages formed by a double wall arrangement of the walls of the main burning zone communicating with passages of a double wall arrangement of the pilot burning zone; this preheated air is turned at the upstream end of the pilot burning zone through swirlers to mix with the original gas and air input (and the liquid fuel input when used) to provide more efficient combustion. One or more fuel injection stages (second stages) are provided for direct input of coal gas into the main burning zone. The countercurrent air coolant passages are connected to swirlers surrounding the input from each second stage to provide additional oxidant.

Vogt, Robert L. (Schenectady, NY)

1981-01-01T23:59:59.000Z

366

Fuel injection staged sectoral combustor for burning low-BTU fuel gas  

SciTech Connect

A high-temperature combustor for burning low-BTU coal gas in a gas turbine is described. The combustor comprises a plurality of individual combustor chambers. Each combustor chamber has a main burning zone and a pilot burning zone. A pipe for the low-BTU coal gas is connected to the upstream end of the pilot burning zone: this pipe surrounds a liquid fuel source and is in turn surrounded by an air supply pipe: swirling means are provided between the liquid fuel source and the coal gas pipe and between the gas pipe and the air pipe. Additional preheated air is provided by counter-current coolant air in passages formed by a double wall arrangement of the walls of the main burning zone communicating with passages of a double wall arrangement of the pilot burning zone: this preheated air is turned at the upstream end of the pilot burning zone through swirlers to mix with the original gas and air input (and the liquid fuel input when used) to provide more efficient combustion. One or more fuel injection stages (second stages) are provided for direct input of coal gas into the main burning zone. The countercurrent air coolant passages are connected to swirlers surrounding the input from each second stage to provide additional oxidant.

Vogt, Robert L. (Schenectady, NY)

1985-02-12T23:59:59.000Z

367

A Testing and Controlling System for the Combustion Test Rig of Gas Turbine Combustor  

Science Conference Proceedings (OSTI)

In this paper, a testing and controlling system is designed for the test rig of gas turbine combustor by using VXi bus and PLC technology. The system is composed of two subsystems: the data acquisition subsystem and the control subsystem. The data acquisition ... Keywords: combustion test rig, VXi bus, PLC control, Modbus agreement, data acquisition

Nihui Xie; Hua Song; Hongzhuan Qiu

2011-10-01T23:59:59.000Z

368

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

E-Print Network (OSTI)

surface reaction of butane. In combustion experiments with a prototype combustor, the wall temperature is proportional to the butane concentration, is employed to characterize the activity of the catalyst layer for n-butane profile of butane-air mixture is assumed at the inlet. The volumetric flow rate QB is kept at 10 sccm

Kasagi, Nobuhide

369

An in-bed tube bank for a fluidized-bed combustor  

DOE Patents (OSTI)

Fluidized-bed combustors have long been used to facilitate the combustion of low-quality fuels and more recently as a means for the clean burning of coal. In a fluidized-bed combustor fuel is fed into a bed of reactive or inert particulate material while air is injected into the bed and passed up through the bed, causing the bed material to act like a turbulent fluid. Where the combustor is utilized for steam generating one or more boiler tubes are positioned so as to span the bed while submerged in the bed, and as fuel is burned within the bed water is injected into the boiler tubes and heated, thereby generating steam. An in-bed tube bank is described for a fluidized bed combustor. The tube bank of the present invention comprises one or more fluid communicating boiler tubes which define a plurality of selectively spaced boiler tube sections. The tube sections are substantially parallel to one another and aligned in a common plane. The tube bank further comprises support members for joining adjacent tube sections, the support members engaging and extending along a selected length of the tube sections and spanning the preselected space there between 4 figs.

Hemenway, L.F. Jr.

1989-08-08T23:59:59.000Z

370

Experimental and computational studies of soot emission in a gas fuelled swirl stabilized combustor  

Science Conference Proceedings (OSTI)

The present study is concerned with measuring and simulating soot and flame structure of a non-premixed gas fired swirl stabilized combustor incorporating a two-step soot model. Soot mass fractions have been measured by gravimetric method. Fluent CFD ... Keywords: finite rate model, flamelet model, soot formation

M. Moghiman; T. M. Gruenberger

2002-12-01T23:59:59.000Z

371

DOE_EnergyEfficiencyStandardsForLargeVolumeWaterHeaters.pdf  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

372

A Stable Vanadium Redox-Flow Battery with High Energy Density for Large-scale Energy Storage  

SciTech Connect

Low cost, high performance redox flow batteries are highly demanded for up to multi-megawatt levels of renewable and grid energy storage. Here, we report a new vanadium redox flow battery with a significant improvement over the current technologies. This new battery utilizes a sulfate-chloride mixed solution, which is capable of dissolving more than 2.5 M vanadium or about a 70% increase in the energy storage capacity over the current vanadium sulfate system. More importantly, the new electrolyte remains stable over a wide temperature range of -5 to 60oC, potentially eliminating the need of active heat management. Its high energy density, broad operational temperature window, and excellent electrochemical performance would lead to a significant reduction in the cost of energy storage, thus accelerating its market penetration.

Li, Liyu; Kim, Soowhan; Wang, Wei; Vijayakumar, M.; Nie, Zimin; Chen, Baowei; Zhang, Jianlu; Xia, Guanguang; Hu, Jian Z.; Graff, Gordon L.; Liu, Jun; Yang, Zhenguo

2011-05-01T23:59:59.000Z

373

Use of superconductive technology for energy storage and power transmission for large power systems: power parks  

DOE Green Energy (OSTI)

A general review and technology assessment of superconducting magnets for energy storage and superconducting cables for power transmission are presented. It is concluded that the technology is now available for applying superconductivity in the power industry. (TFD)

Keller, W.E.

1977-01-01T23:59:59.000Z

374

A large-scale study on predicting and contextualizing building energy usage  

E-Print Network (OSTI)

In this paper we present a data-driven approach to modeling end user energy consumption in residential and commercial buildings. Our model is based upon a data set of monthly electricity and gas bills, collected by a utility ...

Kolter, Jeremy Z.

375

Toward perpetual wireless networks: opportunistic large arrays with transmission thresholds and energy harvesting  

Science Conference Proceedings (OSTI)

Solving the key issue of sustainability of battery-powered sensors continues to attract significant research attention. The prevailing theme of this research is to address this concern using energy-efficient protocols based on a form of simple ...

Aravind Kailas / Mary Ann Ingram

2010-01-01T23:59:59.000Z

376

Factors Influencing Water Heating Energy Use and Peak Demand in a Large Scale Residential Monitoring Study  

E-Print Network (OSTI)

A load research project by the Florida Power Corporation (FPC) is monitoring 200 residences in Central Florida, collecting detailed end-use load data. The monitoring is being performed to better estimate the impact of FPC's load control program, as well as obtain improved appliance energy consumption indexes and load profiles. A portion of the monitoring measures water heater energy use and demand in each home on a 15-minute basis.

Bouchelle, M. P.; Parker, D. S.; Anello, M. T.

2000-01-01T23:59:59.000Z

377

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

SciTech Connect

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

378

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

SciTech Connect

This paper illustrates the challenges of integrating rigorous daylight and electric lighting simulation data with whole-building energy models, and defends the need for such integration to achieve aggressive energy savings. Through a case study example, we examine the ways daylighting -- and daylighting simulation -- drove the design of a large net-zero energy project. We give a detailed review of the daylighting and electric lighting design process for the National Renewable Energy Laboratory's Research Support Facility (RSF), a 220,000 ft2 net-zero energy project the author worked on as a daylighting consultant. A review of the issues involved in simulating and validating the daylighting performance of the RSF will be detailed, including daylighting simulation, electric lighting control response, and integration of Radiance simulation data into the building energy model. Daylighting was a key strategy in reaching the contractual energy use goals for the RSF project; the building's program, layout, orientation and interior/furniture design were all influenced by the daylighting design, and simulation was critical in ensuring these many design components worked together in an integrated fashion, and would perform as required to meet a very aggressive energy performance goal, as expressed in a target energy use intensity.

Guglielmetti, R.; Pless, S.; Torcellini, P.

2010-08-01T23:59:59.000Z

379

Elliptic flow ($v_2$) in pp collisions at energies available at the CERN Large Hadron Collider: A hydrodynamical approach  

E-Print Network (OSTI)

At Large Hadron Collider energy, the expected large multiplicities suggests the presence of collective behavior even in pp collisions. A hydrodynamical approach has been applied to estimate the expected elliptic flow measured by the azimuthal asymmetry parameter $v_2$, in pp collisions at $\\surd$s = 14 TeV. $v_2$ of $\\pi^-$ is found to be strongly dependent on the parton density profile inside a proton [e.g., surface diffuseness parameter ($\\xi$)]. For $\\xi$ = 0.105, $v_2$ is found to be positive while at $\\xi$ = 0.25, $v_2$ is close to zero and approaches negative values at large $p_t$. The impact parameter dependence of $v_2$ has also been studied.

S. K. Prasad; Victor Roy; S. Chattopadhyay; A. K. Chaudhuri

2009-10-26T23:59:59.000Z

380

Advances in Energy Efficiency, Capital Cost, and Installation Schedules for Large Capacity Cooling Applications Using a Packaged Chiller Plant Approach  

E-Print Network (OSTI)

Cooling equipment, whether used to meet air-conditioning or process cooling loads, represents a large consumer of energy. Even more to the point, cooling loads and the associated cooling equipment energy consumption tend to be at maximum levels during periods of high ambient air temperatures. It is precisely at those times that the general demand for energy is at its peak and therefore the price or value of energy is also at its highest level. Cooling loads often drive the peak electric power demand of energy users and thus affect not only the level of consumption of high cost energy, but also affect the peak power demand. Together, the energy and demand costs equate to very high unit costs for operating cooling equipment. Accordingly, it is of interest to minimize cooling energy use and costs by maximizing the energy efficiency of cooling equipment installations. A relatively new approach has been developed and is being increasingly used to maximize chiller plant efficiency. The approach involves the use of a standardized, pre-engineered, shop-fabricated approach to entire chiller plant installations. Compared to the traditional, piece-meal approach to chiller plants that utilize individual component specification, procurement and installation, the "packaged" or modular chiller plant approach often delivers substantially improved energy efficiencies. Also, the packaged plant approach achieves further benefits for large cooling system owners and operators. These additional benefits include: 1) dramatic reductions in unit capital costs of installed chiller plant capacity on a dollar per ton basis, 2) marked improvements in total procurement and installation schedules, 3) significantly smaller space requirements, and 4) enhanced control over total system quality and performance. The capacities and performance characteristics of available chiller plant modules are described, including both electric and non-electric chiller technologies. Examples are presented to illustrate the typical sizes and locations of actual installations as well as the growth and extent of the use of this technology to-date. Case studies document the energy efficiency improvements, cost reductions in both operating and capital costs, and improvements in schedule and space utilization, of the packaged chiller plant approach relative to the traditional chiller plant approach.

Pierson, T. L.; Andrepont, J. S.

2003-05-01T23:59:59.000Z

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.


381

90.1 Prototype Building Models Large Hotel | Building Energy Codes Program  

NLE Websites -- All DOE Office Websites (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

382

90.1 Prototype Building Models Large Office | Building Energy Codes Program  

NLE Websites -- All DOE Office Websites (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

383

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

NLE Websites -- All DOE Office Websites (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

384

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

DOE Green Energy (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

385

A study of fast electron energy transport in relativistically intense laser-plasma interactions with large density scalelengths  

SciTech Connect

A systematic experimental and computational investigation of the effects of three well characterized density scalelengths on fast electron energy transport in ultra-intense laser-solid interactions has been performed. Experimental evidence is presented which shows that, when the density scalelength is sufficiently large, the fast electron beam entering the solid-density plasma is best described by two distinct populations: those accelerated within the coronal plasma (the fast electron pre-beam) and those accelerated near or at the critical density surface (the fast electron main-beam). The former has considerably lower divergence and higher temperature than that of the main-beam with a half-angle of {approx}20 Degree-Sign . It contains up to 30% of the total fast electron energy absorbed into the target. The number, kinetic energy, and total energy of the fast electrons in the pre-beam are increased by an increase in density scalelength. With larger density scalelengths, the fast electrons heat a smaller cross sectional area of the target, causing the thinnest targets to reach significantly higher rear surface temperatures. Modelling indicates that the enhanced fast electron pre-beam associated with the large density scalelength interaction generates a magnetic field within the target of sufficient magnitude to partially collimate the subsequent, more divergent, fast electron main-beam.

Scott, R. H. H.; Norreys, P. A. [Department of Physics, Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ (United Kingdom); Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxford OX11 0QX (United Kingdom); Perez, F.; Baton, S. D. [LULI, Ecole Polytechnique, UMR 7605, CNRS/CEA/UPMC, Route de Saclay, 91128 Palaiseau (France); Santos, J. J.; Nicolai, Ph.; Hulin, S. [Univ. Bordeaux/CNRS/CEA, CELIA, UMR 5107, 33405 Talence (France); Ridgers, C. P. [Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU (United Kingdom); Department of Physics, Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ (United Kingdom); Davies, J. R. [GoLP, Instituto de Plasmas e Fusao Nuclear - Laboratorio Associado, Instituto Superior Tecnico, 1049-001 Lisboa (Portugal); Lancaster, K. L.; Trines, R. M. G. M. [Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxford OX11 0QX (United Kingdom); Bell, A. R.; Tzoufras, M. [Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU (United Kingdom); Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxford OX11 0QX (United Kingdom); Rose, S. J. [Department of Physics, Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ (United Kingdom)

2012-05-15T23:59:59.000Z

386

Environmental Consequences of Large-Scale Deployment of New Energy Systems  

SciTech Connect

This project's scientific goal was to achieve better understanding of where land cover change may mitigate climate change, accounting for both direct climate effects as well as the impacts on the global carbon cycle. As tools for investigating this problem, several models of different complexities were used: an offline land model, a standard coupled climate model, and a model in which coupled carbon-climate interactions were explicitly represented. Results from all model simulations were qualitatively similar: climate mitigation projects involving large-scale re-growth of forests are predicted to be beneficial in mitigating future CO{sub 2}-induced global warming if these are carried out in the tropical latitudes, to be largely ineffectual if conducted in temperate latitudes, and to be counterproductive if implemented at high latitudes. Details of the quantitative differences in these predictions which are exhibited by the chosen climate models also are discussed.

Phillips, T J

2007-02-23T23:59:59.000Z

387

Environmental Consequences of Large-Scale Deployment of New Energy Systems  

DOE Green Energy (OSTI)

This project's scientific goal was to achieve better understanding of where land cover change may mitigate climate change, accounting for both direct climate effects as well as the impacts on the global carbon cycle. As tools for investigating this problem, several models of different complexities were used: an offline land model, a standard coupled climate model, and a model in which coupled carbon-climate interactions were explicitly represented. Results from all model simulations were qualitatively similar: climate mitigation projects involving large-scale re-growth of forests are predicted to be beneficial in mitigating future CO{sub 2}-induced global warming if these are carried out in the tropical latitudes, to be largely ineffectual if conducted in temperate latitudes, and to be counterproductive if implemented at high latitudes. Details of the quantitative differences in these predictions which are exhibited by the chosen climate models also are discussed.

Phillips, T J

2007-02-23T23:59:59.000Z

388

Use of Large Scale Energy Storage for Transmission System Support: Energy Storage as Black-Start Resource  

Science Conference Proceedings (OSTI)

This project is a continuation of work conducted during 2011 and 2012 that examined the technical feasibility and assessed the potential benefits of the use of storage technologies--in particular, large battery systems--to increase transmission capability of transmission networks. Included in this effort was an analysis of the feasibility and potential benefits of using the same battery installation for multiple purposes, including overload relief, voltage control, stability improvement, and ...

2013-12-20T23:59:59.000Z

389

LARGE-SCALE HYDROGEN PRODUCTION FROM NUCLEAR ENERGY USING HIGH TEMPERATURE ELECTROLYSIS  

DOE Green Energy (OSTI)

Hydrogen can be produced from water splitting with relatively high efficiency using high-temperature electrolysis. This technology makes use of solid-oxide cells, running in the electrolysis mode to produce hydrogen from steam, while consuming electricity and high-temperature process heat. When coupled to an advanced high temperature nuclear reactor, the overall thermal-to-hydrogen efficiency for high-temperature electrolysis can be as high as 50%, which is about double the overall efficiency of conventional low-temperature electrolysis. Current large-scale hydrogen production is based almost exclusively on steam reforming of methane, a method that consumes a precious fossil fuel while emitting carbon dioxide to the atmosphere. Demand for hydrogen is increasing rapidly for refining of increasingly low-grade petroleum resources, such as the Athabasca oil sands and for ammonia-based fertilizer production. Large quantities of hydrogen are also required for carbon-efficient conversion of biomass to liquid fuels. With supplemental nuclear hydrogen, almost all of the carbon in the biomass can be converted to liquid fuels in a nearly carbon-neutral fashion. Ultimately, hydrogen may be employed as a direct transportation fuel in a “hydrogen economy.” The large quantity of hydrogen that would be required for this concept should be produced without consuming fossil fuels or emitting greenhouse gases. An overview of the high-temperature electrolysis technology will be presented, including basic theory, modeling, and experimental activities. Modeling activities include both computational fluid dynamics and large-scale systems analysis. We have also demonstrated high-temperature electrolysis in our laboratory at the 15 kW scale, achieving a hydrogen production rate in excess of 5500 L/hr.

James E. O'Brien

2010-08-01T23:59:59.000Z

390

Constraints on Lorentz Invariance Violating Quantum Gravity and Large Extra Dimensions Models using High Energy Gamma Ray Observations  

E-Print Network (OSTI)

Observations of the multi-TeV spectra of the nearby BL objects Mkn 421 and Mkn 501 exhibit the high energy cutoffs predicted to be the result of intergalactic annihilation interactions, primarily with infrared photons having a flux level as determined by various astronomical observations. After correction for this absorption effect, the derived intrinsic spectra of these multi-TeV sources can be explained within the framework of simple synchrotron self-Compton emission models. Stecker and Glashow have shown that the existence of such annihilations via electron-positron pair production interactions up to an energy of 20 TeV puts strong constraints on Lorentz invariance violation. Such constraints have important implications for Lorentz invariance violating (LIV) quantum gravity models as well as LIV models involving large extra dimensions. We also discuss the implications of observations of high energy ?-rays from the Crab Nebula on constraining quantum gravity models.

F. W. Stecker

2003-01-01T23:59:59.000Z

391

Energy Requirement Analysis of Large-Scale Biogas Project in High-Cold Region of China  

Science Conference Proceedings (OSTI)

The annual mean temperature is very low in high cold region of china. The insulating and heating measures on the basis of the energy requirement analysis of biogas project are needed to ensure the normal running of fermentation process. In this paper, ... Keywords: High-cold, Biogas, Fermentation, Heat

Yinsheng Yang; Lili Wang

2012-01-01T23:59:59.000Z

392

Energy based performance tuning for large scale high performance computing systems  

Science Conference Proceedings (OSTI)

Recognition of the importance of power in the field of High Performance Computing, whether it be as an obstacle, expense or design consideration, has never been greater and more pervasive. In response to this challenge, we exploit the unique power measurement ... Keywords: energy efficiency, frequency scaling, high performance computing (HPC), power

James H. Laros, III; Kevin T. Pedretti; Suzanne M. Kelly; Wei Shu; Courtenay T. Vaughan

2012-03-01T23:59:59.000Z

393

Energy Storage and Reactive Power Compensator in a Large Wind Farm: Preprint  

Science Conference Proceedings (OSTI)

The size of wind farm power systems is increasing, and so is the number of wind farms contributing to the power systems network. The size of wind turbines is also increasing--from less than 1 MW a few years ago to the 2- to 3-MW machines being installed today and the 5-MW machines under development. The interaction of the wind farm, energy storage, reactive power compensation, and the power system network is being investigated. Because the loads and the wind farms' output fluctuate during the day, the use of energy storage and reactive power compensation is ideal for the power system network. Energy storage and reactive power compensation can minimize real/reactive power imbalances that can affect the surrounding power system. In this paper, we will show how the contribution of wind farms affects the power distribution network and how the power distribution network, energy storage, and reactive power compensation interact when the wind changes. We will also investigate the size of the components in relation to each other and to the power system.

Muljadi, E.; Butterfield, C. P.; Yinger, R.; Romanowitz, H.

2003-10-01T23:59:59.000Z

394

Meet with Large Businesses  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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)

395

Energy Storage Application Brief -- Case History for Large Flywheel System: Piller -- Flywheel Energy Storage Systems for Premium Power  

Science Conference Proceedings (OSTI)

Piller of Middleton, New York produces premium power systems for power quality and uninterruptible power supply (UPS) applications. An entire family of products is commercially available in a variety of system and circuit configurations for industrial use. These products are beneficial because they are highly reliable and protect from voltage sags. The energy storage components of these systems uses mature, conventional flywheel technology. This technology review describes the various applications of the...

1999-11-23T23:59:59.000Z

396

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 project currently underway at Texas Instruments’ 1,142,000 square foot Electro-Optics manufacturing facility in Dallas, Texas. A subsequent paper will describe commissioning, operation, maintenance, and savings resulting from the project.

Fiorino, D.

1989-09-01T23:59:59.000Z

397

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

DOE Green Energy (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

398

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

E-Print Network (OSTI)

This study is focused on the analysis of indoor conditions for a new commercial building that will be constructed in an East-European country. Based on the initial HVAC design parameters the surface of the building was divided in thermal zones 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 dynamic variation of the PMV (Predicted Mean Vote Index) was obtained for different thermal zones of the building (retails stores, mall circulation, corridors) and in most of the cases the acceptable values of plus/minus 0.5 are exceeded. Among the most important energy efficiency measures it is mentioned a decrease of the heating set point temperature, increase of the walls and roof thermal resistance and the use of a heat recovery on the ventilation system. In this work it is demonstrated how simple measures can enhance the indoor conditions and reduce the energy consumption for this kind of construction.

Catalina, T.

2011-01-01T23:59:59.000Z

399

Production of exotic atoms at energies available at the CERN Large Hadron Collider  

E-Print Network (OSTI)

We study in details the space-time dependence of the production of muonic, pionic, and other exotic atoms by the coherent photon exchange between nuclei at the Large Hadron Collider at CERN. We show that a multipole expansion of the electromagnetic interaction yields an useful insight of the bound-free production mechanism which has not been explored in the literature. Predictions for the spatial, temporal, and angular distribution, as well as the total cross sections, for the production of exotic atoms are also included.

C. A. Bertulani; M. Ellermann

2010-05-21T23:59:59.000Z

400

Production of exotic atoms at energies available at the CERN Large Hadron Collider  

E-Print Network (OSTI)

We study in details the space-time dependence of the production of muonic, pionic, and other exotic atoms by the coherent photon exchange between nuclei at the Large Hadron Collider at CERN. We show that a multipole expansion of the electromagnetic interaction yields an useful insight of the bound-free production mechanism which has not been explored in the literature. Predictions for the spatial, temporal, and angular distribution, as well as the total cross sections, for the production of exotic atoms are also included.

Bertulani, C A

2010-01-01T23:59:59.000Z

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.


401

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

402

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

Science Conference Proceedings (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

403

Large-scale Utilization of Biomass Energy and Carbon Dioxide Capture and Storage in the Transport and Electricity Sectors under Stri ngent CO2 Concentration Limit Scenarios  

Science Conference Proceedings (OSTI)

Status: Published Citation: Luckow, P; Wise, M; Dooley, J; and Kim S. 2010. Large-scale Utilization of Biomass Energy and Carbon Dioxide Capture and Storage in the Transport and Electricity Sectors under Stringent CO2 Concentration Limit Scenarios. In International Journal of Greenhouse Gas Control, Volume 4, Issue 5, 2010, pp. 865-877. Large-scale, dedicated commercial biomass energy systems are a potentially large contributor to meeting stringent global climate policy targets by the end of the century....

2010-12-31T23:59:59.000Z

404

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

405

Effects of potting on training and quench propagation in a large stored energy superconducting dipole coil  

DOE Green Energy (OSTI)

A superconducting racetrack dipole coil was constructed to compare directly training and quench behavior in potted and non-potted coils. The stored energy of this coil was 175 KJoules at the conductor's short sample limit of 238 Amp with a peak field on the coil of 7.6 Tesla. The outward magnetic forces were restrained by rows of tie rods between side plates. Comparisons of training behavior were made for both steel and aluminum tie rods. Helium flow was provided by channels in the fiberglass cable tape allowing 1/4 of the conductor direct access to the helium supply. After training the coil to 90% of short sample limit, the tie rods were relaxed and the entire coil was vacuum impregnated with a standard clear magnet epoxy. After potting, the previous tie rod preloads were re-established. This resulted in a much shallower training curve, and required retraining after thermal cycling. The unpotted coil showed no evidence of internal quench propagation below 80% short sample, whereas the potted coil exhibited good quench propagation and energy dissipation at all currents, simplifying protection strategies. Fully impregnated coils of this design are not practical for thermally cycled magnets designed to operate above 80% of short sample limit.

Cox, B.; Garbincius, P.H.; Guerra, J.; Mazur, P.O.; Satti, J.A.; Tilles, E.B.

1980-09-01T23:59:59.000Z

406

Heat Capacity Evidence for the Suppression of Skyrmions at Large Zeeman Energy  

E-Print Network (OSTI)

Measurements on a multilayer two-dimensional electron system (2DES) near Landau level filling ?=1 reveal the disappearance of the nuclear spin contribution to the heat capacity as the ratio ˜g between the Zeeman and Coulomb energies exceeds a critical value ˜gc?0.04. This disappearance suggests the vanishing of the Skyrmion-mediated coupling between the lattice and the nuclear spins as the spin excitations of the 2DES make a transition from Skyrmions to single spin-flips above ˜gc. Our experimental ˜gc is smaller than the calculated ˜gc=0.054 for an ideal 2DES; we discuss possible origins of this discrepancy. PACS numbers: 73.20.Dx, 73.40.Hm, 65.40.-f Typeset using REVTEX 1 The ground state and spin excitations of a two-dimensional electron system (2DES) near Landau level (LL) filling ?=1 have attracted much recent interest [1–9]. At this filling, the Coulomb exchange energy plays a dominant role, leading to a substantially larger quantum Hall effect (QHE) excitation gap than the expected single-particle Zeeman splitting [1].

S. Melinte; E. Grivei; V. Bayot; M. Shayegan

2008-01-01T23:59:59.000Z

407

Combustion Instability and Blowout Characteristics of Fuel Flexible Gas Turbine Combustors  

NLE Websites -- All DOE Office Websites (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

408

Advanced Sensor Approaches for Monitoring and Control of Gas Turbine Combustors  

NLE Websites -- All DOE Office Websites (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

409

Method and apparatus for the control of fluid dynamic mixing in pulse combustors  

DOE Patents (OSTI)

In a method and apparatus for controlling total ignition delay time in a pulse combustor, and thus controlling the mixing characteristics of the combustion reactants and the combustion products in the combustor, the total ignition delay time is controlled by adjusting the inlet geometry of the inlet to the combustion chamber. The inlet geometry may be fixed or variable for controlling the mixing characteristics. A feedback loop may be employed to sense actual combustion characteristics, and, in response to the sensed combustion characteristics, the inlet geometry may be varied to obtain the total ignition delay time necessary to achieve the desired combustion characteristics. Various embodiments relate to the varying of the mass flow rate of reactants while holding the radius/velocity ratio constant.

Bramlette, T. Tazwell (San Ramon, CA); Keller, Jay O. (Oakland, CA)

1992-06-02T23:59:59.000Z

410

Ultra low injection angle fuel holes in a combustor fuel nozzle  

Science Conference Proceedings (OSTI)

A fuel nozzle for a combustor includes a mixing passage through which fluid is directed toward a combustion area and a plurality of swirler vanes disposed in the mixing passage. Each swirler vane of the plurality of swirler vanes includes at least one fuel hole through which fuel enters the mixing passage in an injection direction substantially parallel to an outer surface of the plurality of swirler vanes thereby decreasing a flameholding tendency of the fuel nozzle. A method of operating a fuel nozzle for a combustor includes flowing a fluid through a mixing passage past a plurality of swirler vanes and injecting a fuel into the mixing passage in an injection direction substantially parallel to an outer surface of the plurality of swirler vanes.

York, William David

2012-10-23T23:59:59.000Z

411

Nondestructive characterization of ceramic composites used as combustor liners in advanced gas turbines  

SciTech Connect

Nondestructive characterization (NDC) methods, which can provide full-field information about components prior to and during use, are critical to the reliable application of continuous fiber ceramic matrix composites in high-firing-temperature (>1,350 C) gas turbines. [For combustor liners, although they are nonmechanical load-bearing components, both thermal characteristics and mechanical integrity are vitally important.] NDC methods being developed to provide necessary information include x-ray computed tomography (mainly for through-wall density and delamination detection), infrared-based thermal diffusivity imaging, and single-wall through-transmission x-ray imaging (mainly for fiber content and alignment detection). Correlation of the data obtained from NDC methods with subscale combustor liner tests have shown positive results at thermal cycling temperatures from 700 C to 1,177 C.

Ellingson, W.A.; Rothermel, S.A. [Argonne National Lab., IL (United States). Energy Technology Div.; Simpson, J.F. [Solar Turbines, Inc., San Diego, CA (United States)

1996-07-01T23:59:59.000Z

412

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

413

Report covering examination of parts from downhole steam generators. [Combustor head and sleeve parts  

Science Conference Proceedings (OSTI)

Combustor head and sleeve parts were examined by using optical and scanning electron metallography after use in oxygen/diesel and air/diesel downhole steam generators. The degradation of the different alloy components is described in terms of reactions with oxygen, sulfur and carbon in the presence of cyclic stresses, all generated by the combustion process. Recommendations are presented for component materials (alloys and coatings) to extend component lives in the downhole steam generators. 9 references, 22 figures, 3 tables.

Pettit, F. S.; Meier, G. H.

1983-08-01T23:59:59.000Z

414

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

NLE Websites -- All DOE Office Websites (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.

415

Solar total energy-large scale experiment, Shenandoah, Georgia site. Annual report, June 1977--June 1978. [For Bleyle Knitwear Plant  

DOE Green Energy (OSTI)

The site was described in terms of location, suitably, accessibility, and other factors. Detailed descriptions of the Solar Total Energy-Large Scale Experiment Application (STE-LSE) (Bleyle of America, Inc., Knitwear Plant), the DOE owned Meteorology Station operating at the site, and the instrumentation provided by the Georgia Power Company to measure energy usage within the knitwear plant are included. A detailed report of progress is given at the Shenandoah Site, introduced by the STE-LSE schedule and the Cooperative Agreement work tasks. Progress is described in terms of the following major task areas: site/application; instrumentation/data acquisition; meteorology station; site to STES interface; information dissemination. A brief overview of milestones to be accomplished is given, followed by these appendices: solar easement agreement, interface drawing set, and additional site background data. (MHR)

None,

1978-06-01T23:59:59.000Z

416

Constraints on Dark Energy from Supernovae, Gamma Ray Bursts, Acoustic Oscillations, Nucleosynthesis and Large Scale Structure and the Hubble constant  

E-Print Network (OSTI)

The luminosity distance vs. redshift law is now measured using supernovae and gamma ray bursts, and the angular size distance is measured at the surface of last scattering by the CMB and at z = 0.35 by baryon acoustic oscillations. In this paper this data is fit to models for the equation of state with w = -1, w = const, and w(z) = w_0+w_a(1-a). The last model is poorly constrained by the distance data, leading to unphysical solutions where the dark energy dominates at early times unless the large scale structure and acoustic scale constraints are modified to allow for early time dark energy effects. A flat LambdaCDM model is consistent with all the data.

Edward L. Wright

2007-01-22T23:59:59.000Z

417

LCA of local strategies for energy recovery from waste in England, applied to a large municipal flow  

Science Conference Proceedings (OSTI)

An intense waste management (WM) planning activity is currently undergoing in England to build the infrastructure necessary to treat residual wastes, increase recycling levels and the recovery of energy from waste. From the analyses of local WM strategic and planning documents we have identified the emerging of three different energy recovery strategies: established combustion of residual waste; pre-treatment of residual waste and energy recovery from Solid Recovered Fuel in a dedicated plant, usually assumed to be a gasifier; pre-treatment of residual waste and reliance on the market to accept the 'fuel from waste' so produced. Each energy recovery strategy will result in a different solution in terms of the technology selected; moreover, on the basis of the favoured solution, the total number, scale and location of thermal treatment plants built in England will dramatically change. To support the evaluation and comparison of these three WM strategy in terms of global environmental impacts, energy recovery possibilities and performance with respect to changing 'fuel from waste' market conditions, the LCA comparison of eight alternative WM scenarios for a real case study dealing with a large flow of municipal wastes was performed with the modelling tool WRATE. The large flow of waste modelled allowed to formulate and assess realistic alternative WM scenarios and to design infrastructural systems which are likely to correspond to those submitted for approval to the local authorities. The results show that all alternative scenarios contribute to saving abiotic resources and reducing global warming potential. Particularly relevant to the current English debate, the performance of a scenario was shown to depend not from the thermal treatment technology but from a combination of parameters, among which most relevant are the efficiency of energy recovery processes (both electricity and heat) and the calorific value of residual waste and pre-treated material. The contribution and relative importance of recycling and treatment/recovery processes change with the impact category. The lack of reprocessing plants in the area of the case study has shown the relevance of transport distances for recyclate material in reducing the efficiency of a WM system. Highly relevant to the current English WM infrastructural debate, these results for the first time highlight the risk of a significant reduction in the energy that could be recovered by local WM strategies relying only on the market to dispose of the 'fuel from waste' in a non dedicated plant in the case that the SRF had to be sent to landfill for lack of treatment capacity.

Tunesi, Simonetta, E-mail: s.tunesi@ucl.ac.uk [Environment Institute, University College London, Pearson Building, Gower Street, WC1E 6BT London (United Kingdom)

2011-03-15T23:59:59.000Z

418

Oxidation of Low Calorific Value Gases-Applying Optimization Techniques to Combustor Design  

DOE Green Energy (OSTI)

The design of an optimal air-staged combustor for the oxidation of a low calorific value gas mixture is presented. The focus is on the residual fuel emitted from the anode of a molten carbonate fuel cell. Both experimental and numerical results are presented. The simplified numerical model considers a series of plug-flow-reactor sections, with the possible addition of a perfectly-stirred reactor. The parameter used for optimization, Z, is the sum of fuel-component molar flow rates leaving a particular combustor section. An optimized air injection profile is one that minimizes Z for a given combustor length and inlet condition. Since a mathematical proof describing the significance of global interactions remains lacking; the numerical model employs both a ''Local'' optimization procedure and a ''Global'' optimization procedure. The sensitivity of Z to variations in the air injection profile and inlet temperature is also examined. The results show that oxidation of the anode exhaust gas is possible with low pollutant emissions.

Randall S. Gemmen

1999-11-01T23:59:59.000Z

419

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

SciTech Connect

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

420

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

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While these samples are representative of the content of NLEBeta,
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421

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

NLE Websites -- All DOE Office Websites (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

422

Measurement and capture of fine and ultrafine particles from a pilot-scale pulverized coal combustor with an electrostatic precipitator  

Science Conference Proceedings (OSTI)

Experiments were carried out in a pilot-scale pulverized coal combustor at the Energy and Environmental Research Center (EERC) burning a Powder River Basin (PRB) subbituminous coal. A scanning mobility particle sizer (SMPS) and an electrical low-pressure impactor (ELPI) were used to measure the particle size distributions (PSDs) in the range of 17 nm to 10 m at the inlet and outlet of the electrostatic precipitator (ESP). At the ESP inlet, a high number concentration of ultrafine particles was found, with the peak at approximately 75 nm. A trimodal PSD for mass concentration was observed with the modes at approximately 80-100 nm, 1-2 {mu}m, and 10 {mu}m. The penetration of ultrafine particles through the ESP increased dramatically as particle size decreased below 70 nm, attributable to insufficient or partial charging of the ultrafine particles. Injection of nanostructured fine-particle sorbents for capture of toxic metals in the flue gas caused high penetration of the ultrafine particles through the ESP. The conventional ESP was modified to enhance charging using soft X-ray irradiation. A slipstream of flue gas was introduced from the pilot-scale facility and passed through this modified ESP. Enhancement of particle capture was observed with the soft X-ray irradiation when moderate voltages were used in the ESP, indicating more efficient charging of fine particles. 32 refs., 5 figs., 1 tab.

Ying Li; Achariya Suriyawong; Michael Daukoru; Ye Zhuang; Pratim Biswas [Washington University, St. Louis, MO (United States). Aerosol and Air Quality Research Laboratory

2009-05-15T23:59:59.000Z

423

A Methodology 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)

The development of the energy services industry and the implementation of energy savings retrofits by energy services companies has increased the focus on the performance of energy saving retrofits. Energy savings measurement, though not an exact science, has been developing as well to ensure the benefit of a retrofit and to provide a level of assurance for the customers of energy services companies. This thesis presents a useful methodology for baselining campus utility usage using regression modeling techniques and measured daily data for the purpose of measuring energy savings. The methodology of this thesis improves upon previous regression modeling of individual buildings by extending commercial building energy usage models to an entire campus, modeling the operation of a central plant, and modeling central plant equipment performance with regression models. By adding equipment production layers, the user can more easily determine the cause of changes in the primary energy usage of a 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 and using the second portion of the data to validate the performance of the baseline model. Further development of the methodology could include the addition of an economic module and refinement of the model to incorporate the use of hourly data.

Beasley, R. C.

1999-08-01T23:59:59.000Z

424

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)

The development of the energy services industry and the implementation of energy savings retrofits by energy services companies has increased the focus on the performance of energy saving retrofits. Energy savings measurement, though not an exact science, has been developing as well to ensure the benefit of a retrofit and to provide a level of assurance for the customers of energy services companies. This thesis presents a useful methodology for datelining campus utility usage using regression modeling techniques and measured daily data for the purpose of measuring energy savings. The methodology of this thesis improves upon previous regression modeling of individual buildings by extending commercial building energy usage models to an entire campus, modeling the operation of a central plant, and modeling central plant equipment performance with regression models. By adding equipment production layers, the user can more easily determine the cause of changes in the primary energy usage of a 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 and using the second portion of the data to validate the performance of the baseline model. Further development of the methodology could include the addition of an economic module and refinement of the model to incorporate the use of hourly data.

Beasley, Rodney Craig

1999-01-01T23:59:59.000Z

425

Large Scale Duty Cycle (LSDC) Project: Tractive Energy Analysis Methodology and Results from Long-Haul Truck Drive Cycle Evaluations  

DOE Green Energy (OSTI)

This report addresses the approach that will be used in the Large Scale Duty Cycle (LSDC) project to evaluate the fuel savings potential of various truck efficiency technologies. The methods and equations used for performing the tractive energy evaluations are presented and the calculation approach is described. Several representative results for individual duty cycle segments are presented to demonstrate the approach and the significance of this analysis for the project. The report is divided into four sections, including an initial brief overview of the LSDC project and its current status. In the second section of the report, the concepts that form the basis of the analysis are presented through a discussion of basic principles pertaining to tractive energy and the role of tractive energy in relation to other losses on the vehicle. In the third section, the approach used for the analysis is formalized and the equations used in the analysis are presented. In the fourth section, results from the analysis for a set of individual duty cycle measurements are presented and different types of drive cycles are discussed relative to the fuel savings potential that specific technologies could bring if these drive cycles were representative of the use of a given vehicle or trucking application. Additionally, the calculation of vehicle mass from measured torque and speed data is presented and the accuracy of the approach is demonstrated.

LaClair, Tim J [ORNL

2011-05-01T23:59:59.000Z

426

Measured energy savings and demand reduction from a reflective roof membrane on a large retail store in Austin  

SciTech Connect

In this study, we measured and documented summertime air-conditioning (a/c) daily energy savings and demand reduction from a reflective roof membrane retrofit on a large retail store in Austin, Texas. The original black rubber membrane was replaced with white thermoplastic resulting in a decrease in the average maximum roof surface temperature from 168 degrees F (76 degrees C) to 126 degrees F (52 degrees C). This building, with 100,000ft2 (9300m2) of roof area, yielded 3.6Wh/ft2 (39Wh/m2) in a/c average daily energy savings and 0.35W/ft2 (3.8W/m2) in average reduced demand. Total a/c annual abated energy and demand expenditures were estimated to be $7200 or $0.072/ft2 ($0.77/m2). Based on cost data provided by the building manager, the payback is instantaneous with negligible incremental combined labor and material costs. The estimated present value of future abated expenditures ranged from $62,000 to $71,000 over the baseline 13-year service life of the roof membrane.

Konopacki, Steven J.; Akbari, Hashem

2001-06-25T23:59:59.000Z

427

MIT Energy Initiative Symposium on Managing Large-Scale Penetration of Intermittent Renewables | April 20, 2011 C Managing Large-Scale  

E-Print Network (OSTI)

EI7135_Industrielle_Energiewirtschaft.xls Allgemeine Daten: Modulnummer: EI7135 Modulbezeichnung (dt.): Industrielle Energiewirtschaft Modulbezeichnung (en.): Industrial Energy Economy Modulniveau Folgesemester: Wiederholung auch am Semesterende: Modulbeschreibung Seite 1 von 4 #12;EI7135_Industrielle_Energiewirtschaft

Polz, Martin

428

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

DOE Green Energy (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

429

Implementation of a Large Scale Control System for a High-Energy Physics Detector: The CMS Silicon Strip Tracker  

E-Print Network (OSTI)

Control systems for modern High-Energy Physics (HEP) detectors are large distributed software systems managing a significant data volume and implementing complex operational procedures. The control software for the LHC experiments at CERN is built on top of a commercial software used in industrial automation. However, HEP specific requirements call for extended functionalities. This thesis focuses on the design and implementation of the control system for the CMS Silicon Strip Tracker but presents some general strategies that have been applied in other contexts. Specific design solutions are developed to ensure acceptable response times and to provide the operator with an effective summary of the status of the devices. Detector safety is guaranteed by proper configuration of independent hardware systems. A software protection mechanism is used to avoid the widespread intervention of the hardware safety and to inhibit dangerous commands. A wizard approach allows non expert operators to recover error situations...

Masetti, Lorenzo; Fischer, Peter

2011-01-01T23:59:59.000Z

430

Compressed air energy storage technology program. Annual report for 1979  

DOE Green Energy (OSTI)

The objectives of the Compressed Air Energy Storage (CAES) program are to establish stability criteria for large underground reservoirs in salt domes, hard rock, and porous rock used for air storage in utility applications, and to develop second-generation CAES technologies that have minimal or no dependence on petroleum fuels. During the year reported reports have been issued on field studies on CAES on aquifers and in salt, stability, and design criteria for CAES and for pumped hydro-storage caverns, laboratory studies of CAES in porous rock reservoris have continued. Research has continued on combined CAES/Thermal Energy Storage, CAES/Solar systems, coal-fired fluidized bed combustors for CAES, and two-reservoir advanced CAES concepts. (LCL)

Loscutoff, W.V.

1980-06-01T23:59:59.000Z

431

HIGH-TEMPERATURE ELECTROLYSIS FOR LARGE-SCALE HYDROGEN AND SYNGAS PRODUCTION FROM NUCLEAR ENERGY – SYSTEM SIMULATION AND ECONOMICS  

DOE Green Energy (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

432

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

Science Conference Proceedings (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

433

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

434

Development of a gravel bed combustor for a solid fueled gas turbine for the period February 1, 1989 to June 30, 1991  

SciTech Connect

Further work on a novel pressurized, downdraft combustor using aspen woodchips is reported for the period 2/89 to 6/91. The 42 cm i.d combustor was connected to a modified Allison 250-C20B gas turbine engine and operated for 250 hours. The performance of the combustor-turbine system is discussed. Deposits of ash on the turbine nozzles and rotors are identified and discussed. A dynamic simulation model for the combustor-turbine system is presented and used to investigate the control of the system. The highest net power output was 61 kW or 20% of full power; the highest turbine speed was 75% of the maximum speed; the highest mass flow was 50% of the full power flow. The stability of the combustor must be improved before higher output and longer runs can be achieved.

Ragland, K.W.; Aerts, D.J.; Palmer, C.A.

1992-06-01T23:59:59.000Z

435

Vector meson production in coherent hadronic interactions: Update on predictions for energies available at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider  

SciTech Connect

In this Rapid Communication we update our predictions for the photoproduction of vector mesons in coherent pp and AA collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies using the color dipole approach and the Color Glass Condensate formalism. In particular, we present our predictions for the first run of the LHC at half energy and for the rapidity dependence of the ratio between the J/{Psi} and {rho} cross sections at RHIC energies.

Goncalves, V. P. [Instituto de Fisica e Matematica, Universidade Federal de Pelotas Caixa Postal 354, CEP 96010-900, Pelotas, RS (Brazil); Machado, M. V. T. [Instituto de Fisica, Universidade Federal do Rio Grande do Sul Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS (Brazil)

2011-07-15T23:59:59.000Z

436

High Performance Catalytic Heat Exchanger for SOFC Systems - FuelCell Energy  

NLE Websites -- All DOE Office Websites (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

437

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

438

Method for control of NOx emission from combustors using fuel dilution  

SciTech Connect

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

439

Melt Infiltrated Ceramic Matrix Composites for Shrouds and Combustor Liners of Advanced Industrial Gas Turbines  

DOE Green Energy (OSTI)

This report covers work performed under the Advanced Materials for Advanced Industrial Gas Turbines (AMAIGT) program by GE Global Research and its collaborators from 2000 through 2010. A first stage shroud for a 7FA-class gas turbine engine utilizing HiPerComp{reg_sign}* ceramic matrix composite (CMC) material was developed. The design, fabrication, rig testing and engine testing of this shroud system are described. Through two field engine tests, the latter of which is still in progress at a Jacksonville Electric Authority generating station, the robustness of the CMC material and the shroud system in general were demonstrated, with shrouds having accumulated nearly 7,000 hours of field engine testing at the conclusion of the program. During the latter test the engine performance benefits from utilizing CMC shrouds were verified. Similar development of a CMC combustor liner design for a 7FA-class engine is also described. The feasibility of using the HiPerComp{reg_sign} CMC material for combustor liner applications was demonstrated in a Solar Turbines Ceramic Stationary Gas Turbine (CSGT) engine test where the liner performed without incident for 12,822 hours. The deposition processes for applying environmental barrier coatings to the CMC components were also developed, and the performance of the coatings in the rig and engine tests is described.

Gregory Corman; Krishan Luthra; Jill Jonkowski; Joseph Mavec; Paul Bakke; Debbie Haught; Merrill Smith

2011-01-07T23:59:59.000Z

440

LARGE SUPERCONDUCTING DETECTOR MAGNETS WITH ULTRA THIN COILS FOR USE IN HIGH ENERGY ACCELERATORS AND STORAGE RINGS  

E-Print Network (OSTI)

contained 890 kJ of magnetic energy,:and i t iia:~ ,operat:as a functiori of stored· magnetic energy' for a number ofabsorbs a portion of the magnetic energy in the process. The

Green, M.A.

2010-01-01T23:59:59.000Z

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.


441

Black Thunder Coal Mine and Los Alamos National Laboratory experimental study of seismic energy generated by large scale mine blasting  

SciTech Connect

In an attempt to better understand the impact that large mining shots will have on verifying compliance with the international, worldwide, Comprehensive Test Ban Treaty (CTBT, no nuclear explosion tests), a series of seismic and videographic experiments has been conducted during the past two years at the Black Thunder Coal Mine. Personnel from the mine and Los Alamos National Laboratory have cooperated closely to design and perform experiments to produce results with mutual benefit to both organizations. This paper summarizes the activities, highlighting the unique results of each. Topics which were covered in these experiments include: (1) synthesis of seismic, videographic, acoustic, and computer modeling data to improve understanding of shot performance and phenomenology; (2) development of computer generated visualizations of observed blasting techniques; (3) documentation of azimuthal variations in radiation of seismic energy from overburden casting shots; (4) identification of, as yet unexplained, out of sequence, simultaneous detonation in some shots using seismic and videographic techniques; (5) comparison of local (0.1 to 15 kilometer range) and regional (100 to 2,000 kilometer range) seismic measurements leading to determine of the relationship between local and regional seismic amplitude to explosive yield for overburden cast, coal bulking and single fired explosions; and (6) determination of the types of mining shots triggering the prototype International Monitoring System for the CTBT.

Martin, R.L.; Gross, D. [Thunder Basin Coal Co., Wright, WY (United States); Pearson, D.C.; Stump, B.W. [Los Alamos National Lab., NM (United States); Anderson, D.P. [Southern Methodist Univ., Dallas, TX (United States). Dept. of Geological Sciences

1996-12-31T23:59:59.000Z