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Note: This page contains sample records for the topic "advanced lean burn" from the National Library of EnergyBeta (NLEBeta).
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1

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames  

E-Print Network (OSTI)

effects on cellular burning structures in lean premixedAnalyzing and Tracking Burning Structures in Lean Premixedthe turbulence of the burning process with the distribution

Bremer, Peer-Timo

2010-01-01T23:59:59.000Z

2

NETL: Releases & Briefs - Laser ignition for lean-burn engines  

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

Energy Technology Laboratory have successfully operated a laser-spark lean-burn natural gas reciprocating engine. Development of lean-burn engines is driven by demand for higher...

3

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames  

E-Print Network (OSTI)

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames P.-T. Bremer1, G. Weber2 flames subject to different levels of tur- bulence. Due to their unstable nature, lean flames burn to quantitatively correlate the turbulence of the burning process with the distribution of burning regions, properly

4

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames  

E-Print Network (OSTI)

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames Peer-Timo Bremer, Member levels of turbulence. Due to their unstable nature, lean flames burn in cells separated by locally the turbulence of the burning process with the distribution of burning regions, properly segmented and selected

Pascucci, Valerio

5

Dynamic Optimization of Lean Burn Engine Aftertreatment  

E-Print Network (OSTI)

The competition to deliver fuel e#cient and environmentally friendly vehicles is driving the 1 2 Submitted to Journal of Dynamics Systems, Measurement, & Control automotive industry to consider ever more complex powertrain systems. Adequate performance of these new highly interactive systems can no longer be obtained through traditional approaches, which are intensive in hardware use and #nal control software calibration. This paper explores the use of Dynamic Programming to make model-based design decisions for a lean burn, direct injection spark ignition engine, in combination with a three way catalyst and an additional threeway catalyst, often referred to as a lean NOx trap. The primary contribution is the development ofavery rapid method to evaluate the tradeo#s in fuel economy and emissions for this novel powertrain system, as a function of design parameters and controller structure, over a standard emission test cycle. 1 Introduction Designing a powertrain system to m...

Jun-Mo Kang; Ilya Kolmanovsky; J. W. Grizzle

2001-01-01T23:59:59.000Z

6

A Hypothetical Burning-Velocity Formula for Very Lean Hydrogen-Air Mixtures  

E-Print Network (OSTI)

K. Fig. 2 Comparisons of burning-velocity predictions withcurve), when an experimental burning velocity (points) of 53and calculated laminar burning velocities of lean hydrogen-

Grcar, Joseph F

2008-01-01T23:59:59.000Z

7

Cellular burning in lean premixed turbulent hydrogen-air flames: coupling experimental and  

E-Print Network (OSTI)

Cellular burning in lean premixed turbulent hydrogen-air flames: coupling experimental for burning the fuel-lean mixtures of hydrogen or hydrogen-rich syngas fuels obtained from the gasification, including those burning lean hydrogen at both at atmospheric and elevated pressures [6]. The low

Bell, John B.

8

A Hypothetical Burning-Velocity Formula for Very Lean Hydrogen-Air Mixtures  

E-Print Network (OSTI)

R.W. Shefer, Int. J. Hydrogen Energy 28 (2003) 1131-1141. P.burning velocities of lean hydrogen-air flames at 1 atm andFORMULA FOR VERY LEAN HYDROGEN-AIR MIXTURES by Forman A.

Grcar, Joseph F

2008-01-01T23:59:59.000Z

9

Approximate Dynamic Programming Solutions for Lean Burn Engine Aftertreatment  

E-Print Network (OSTI)

The competition to deliver fuel e#cient and environmentally friendly vehicles is driving the automotive industry to consider ever more complex powertrain systems. Adequate performance of these new highly interactive systems can no longer be obtained through traditional approaches, which are intensive in hardware use and #nal control software calibration. This paper explores the use of dynamic programming to make model-based design decisions for a lean burn, direct injection spark ignition engine, in combination with a three way catalyst and lean NOx trap aftertreatment system. The primary contribution is the development ofavery rapid method to evaluate the tradeo#s in fuel economy and emissions for this novel powertrain system, as a function of design parameters and controller structure, over a standard emission test cycle. 1 Introduction Designing a powertrain system to meet drivability, fuel economy and emissions performance requirements is a complicated task. There are many tradeo...

Jun-Mo Kang; Ilya Kolmanovsky; J.W. Grizzle

1999-01-01T23:59:59.000Z

10

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames  

DOE Green Energy (OSTI)

This paper presents topology-based methods to robustly extract, analyze, and track features defined as subsets of isosurfaces. First, we demonstrate how features identified by thresholding isosurfaces can be defined in terms of the Morse complex. Second, we present a specialized hierarchy that encodes the feature segmentation independent of the threshold while still providing a flexible multi-resolution representation. Third, for a given parameter selection we create detailed tracking graphs representing the complete evolution of all features in a combustion simulation over several hundred time steps. Finally, we discuss a user interface that correlates the tracking information with interactive rendering of the segmented isosurfaces enabling an in-depth analysis of the temporal behavior. We demonstrate our approach by analyzing three numerical simulations of lean hydrogen flames subject to different levels of turbulence. Due to their unstable nature, lean flames burn in cells separated by locally extinguished regions. The number, area, and evolution over time of these cells provide important insights into the impact of turbulence on the combustion process. Utilizing the hierarchy we can perform an extensive parameter study without re-processing the data for each set of parameters. The resulting statistics enable scientist to select appropriate parameters and provide insight into the sensitivity of the results wrt. to the choice of parameters. Our method allows for the first time to quantitatively correlate the turbulence of the burning process with the distribution of burning regions, properly segmented and selected. In particular, our analysis shows that counter-intuitively stronger turbulence leads to larger cell structures, which burn more intensely than expected. This behavior suggests that flames could be stabilized under much leaner conditions than previously anticipated.

Bremer, Peer-Timo; Weber, Gunther; Pascucci, Valerio; Day, Marc; Bell, John

2009-06-01T23:59:59.000Z

11

Exhaust gas purification system for lean burn engine  

DOE Patents (OSTI)

An exhaust gas purification system for a lean burn engine includes a thermal mass unit and a NO.sub.x conversion catalyst unit downstream of the thermal mass unit. The NO.sub.x conversion catalyst unit includes at least one catalyst section. Each catalyst section includes a catalytic layer for converting NO.sub.x coupled to a heat exchanger. The heat exchanger portion of the catalyst section acts to maintain the catalytic layer substantially at a desired temperature and cools the exhaust gas flowing from the catalytic layer into the next catalytic section in the series. In a further aspect of the invention, the exhaust gas purification system includes a dual length exhaust pipe upstream of the NO.sub.x conversion catalyst unit. The dual length exhaust pipe includes a second heat exchanger which functions to maintain the temperature of the exhaust gas flowing into the thermal mass downstream near a desired average temperature.

Haines, Leland Milburn (Northville, MI)

2002-02-19T23:59:59.000Z

12

A HYPOTHETICAL BURNING-VELOCITY FORMULA FOR VERY LEAN HYDROGEN-AIR MIXTURES  

E-Print Network (OSTI)

1 A HYPOTHETICAL BURNING-VELOCITY FORMULA FOR VERY LEAN HYDROGEN-AIR MIXTURES by Forman A. Williams experience strong diffusive-thermal types of cellular instabilities that tend to increase the laminar burning propagating, planar, hexagonal, close-packed array of flame balls, each burning as if it were an isolated

Geddes, Cameron Guy Robinson

13

Apparatus and method for burning a lean, premixed fuel/air mixture with low NOx emission  

DOE Patents (OSTI)

An apparatus for enabling a burner to stably burn a lean fuel/air mixture. The burner directs the lean fuel/air mixture in a stream. The apparatus comprises an annular flame stabilizer; and a device for mounting the flame stabilizer in the fuel/air mixture stream. The burner may include a body having an internal bore, in which case, the annular flame stabilizer is shaped to conform to the cross-sectional shape of the bore, is spaced from the bore by a distance greater than about 0.5 mm, and the mounting device mounts the flame stabilizer in the bore. An apparatus for burning a gaseous fuel with low NOx emissions comprises a device for premixing air with the fuel to provide a lean fuel/air mixture; a nozzle having an internal bore through which the lean fuel/air mixture passes in a stream; and a flame stabilizer mounted in the stream of the lean fuel/air mixture. The flame stabilizer may be mounted in the internal bore, in which case, it is shaped and is spaced from the bore as just described. In a method of burning a lean fuel/air mixture, a lean fuel/air mixture is provided, and is directed in a stream; an annular eddy is created in the stream of the lean fuel/air mixture; and the lean fuel/air mixture is ignited at the eddy.

Kostiuk, Larry W. (Edmonton, CA); Cheng, Robert K. (Kensington, CA)

1996-01-01T23:59:59.000Z

14

Analyzing and Tracking Burning Structures in Lean Premixed Hydrogen Flames  

E-Print Network (OSTI)

hydrogen ?ames. Combustion and Flame, 156:1035–1045, 2009. [in Lean Premixed Hydrogen Flames P. -T. Bremer 1 , G. Weber

Bremer, Peer-Timo

2010-01-01T23:59:59.000Z

15

Method and apparatus for controlling fuel/air mixture in a lean burn engine  

DOE Patents (OSTI)

The system for controlling the fuel/air mixture supplied to a lean burn engine when operating on natural gas, gasoline, hydrogen, alcohol, propane, butane, diesel or any other fuel as desired. As specific humidity of air supplied to the lean burn engine increases, the oxygen concentration of exhaust gas discharged by the engine for a given equivalence ratio will decrease. Closed loop fuel control systems typically attempt to maintain a constant exhaust gas oxygen concentration. Therefore, the decrease in the exhaust gas oxygen concentration resulting from increased specific humidity will often be improperly attributed to an excessive supply of fuel and the control system will incorrectly reduce the amount of fuel supplied to the engine. Also, the minimum fuel/air equivalence ratio for a lean burn engine to avoid misfiring will increase as specific humidity increases. A relative humidity sensor to allow the control system to provide a more enriched fuel/air mixture at high specific humidity levels. The level of specific humidity may be used to compensate an output signal from a universal exhaust gas oxygen sensor for changing oxygen concentrations at a desired equivalence ratio due to variation in specific humidity specific humidity. As a result, the control system will maintain the desired efficiency, low exhaust emissions and power level for the associated lean burn engine regardless of the specific humidity level of intake air supplied to the lean burn engine.

Kubesh, John Thomas (San Antonio, TX); Dodge, Lee Gene (San Antonio, TX); Podnar, Daniel James (San Antonio, TX)

1998-04-07T23:59:59.000Z

16

Selective NOx Recirculation for Stationary Lean-Burn Natural Gas Engines  

SciTech Connect

Nitric oxide (NO) and nitrogen dioxide (NO2) generated by internal combustion (IC) engines are implicated in adverse environmental and health effects. Even though lean-burn natural gas engines have traditionally emitted lower oxides of nitrogen (NOx) emissions compared to their diesel counterparts, natural gas engines are being further challenged to reduce NOx emissions to 0.1 g/bhp-hr. The Selective NOx Recirculation (SNR) approach for NOx reduction involves cooling the engine exhaust gas and then adsorbing the NOx from the exhaust stream, followed by the periodic desorption of NOx. By sending the desorbed NOx back into the intake and through the engine, a percentage of the NOx can be decomposed during the combustion process. SNR technology has the support of the Department of Energy (DOE), under the Advanced Reciprocating Engine Systems (ARES) program to reduce NOx emissions to under 0.1 g/bhp-hr from stationary natural gas engines by 2010. The NO decomposition phenomenon was studied using two Cummins L10G natural gas fueled spark-ignited (SI) engines in three experimental campaigns. It was observed that the air/fuel ratio ({lambda}), injected NO quantity, added exhaust gas recirculation (EGR) percentage, and engine operating points affected NOx decomposition rates within the engine. Chemical kinetic model predictions using the software package CHEMKIN were performed to relate the experimental data with established rate and equilibrium models. The model was used to predict NO decomposition during lean-burn, stoichiometric burn, and slightly rich-burn cases with added EGR. NOx decomposition rates were estimated from the model to be from 35 to 42% for the lean-burn cases and from 50 to 70% for the rich-burn cases. The modeling results provided an insight as to how to maximize NOx decomposition rates for the experimental engine. Results from this experiment along with chemical kinetic modeling solutions prompted the investigation of rich-burn operating conditions, with added EGR to prevent preignition. It was observed that the relative air/fuel ratio, injected NO quantity, added EGR fraction, and engine operating points affected the NO decomposition rates. While operating under these modified conditions, the highest NO decomposition rate of 92% was observed. In-cylinder pressure data gathered during the experiments showed minimum deviation from peak pressure as a result of NO injections into the engine. A NOx adsorption system, from Sorbent Technologies, Inc., was integrated with the Cummins engine, comprised a NOx adsorbent chamber, heat exchanger, demister, and a hot air blower. Data were gathered to show the possibility of NOx adsorption from the engine exhaust, and desorption of NOx from the sorbent material. In order to quantify the NOx adsorption/desorption characteristics of the sorbent material, a benchtop adsorption system was constructed. The temperature of this apparatus was controlled while data were gathered on the characteristics of the sorbent material for development of a system model. A simplified linear driving force model was developed to predict NOx adsorption into the sorbent material as cooled exhaust passed over fresh sorbent material. A mass heat transfer analysis was conducted to analyze the possibility of using hot exhaust gas for the desorption process. It was found in the adsorption studies, and through literature review, that NO adsorption was poor when the carrier gas was nitrogen, but that NO in the presence of oxygen was adsorbed at levels exceeding 1% by mass of the sorbent. From the three experimental campaigns, chemical kinetic modeling analysis, and the scaled benchtop NOx adsorption system, an overall SNR system model was developed. An economic analysis was completed, and showed that the system was impractical in cost for small engines, but that economies of scale favored the technology.

Nigel N. Clark

2006-12-31T23:59:59.000Z

17

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

18

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

19

A Hypothetical Burning-Velocity Formula for Very Lean Hydrogen-Air Mixtures  

SciTech Connect

Very lean hydrogen-air mixtures experience strong diffusive-thermal types of cellular instabilities that tend to increase the laminar burning velocity above the value that applies to steady, planar laminar flames that are homogeneous in transverse directions. Flame balls constitute an extreme limit of evolution of cellular flames. To account qualitatively for the ultimate effect of diffusive-thermal instability, a model is proposed in which the flame is a steadily propagating, planar, hexagonal, close-packed array of flame balls, each burning as if it were an isolated, stationary, ideal flame ball in an infinite, quiescent atmosphere. An expression for the laminar burning velocity is derived from this model, which theoretically may provide an upper limit for the experimental burning velocity.

Williams, Forman; Williams, Forman A; Grcar, Joseph F

2008-06-30T23:59:59.000Z

20

Fast-regenerable sulfur dioxide absorbents for lean-burn diesel engine emission control  

SciTech Connect

It is known that sulfur oxides contribute significantly and deleteriously to the overall performance of lean-burn diesel engine aftertreatment systems, especially in the case of NOx traps. A Ag-based, fast regenerable SO2 absorbent has been developed and will be described. Over a temperature range of 300oC to 550oC, it absorbs almost all of the SO2 in the simulated exhaust gases during the lean cycles and can be fully regenerated by the short rich cycles at the same temperature. Its composition has been optimized as 1 wt% Pt-5wt%Ag-SiO2, and the preferred silica source for the supporting material has been identified as inert Cabosil fumed silica. The thermal instability of Ag2O under fuel-lean conditions at 230oC and above makes it possible to fast regenerate the sulfur-loaded absorbent during the following fuel-rich cycles. Pt catalyst helps reducing Ag2SO4 during rich cycles at low temperatures. And the chemically inert fumed SiO2 support gives the absorbent long term stability. This absorbent shows great potential to work under the same lean-rich cycling conditions as those imposed on the NOx traps, and thus, can protect the downstream particulate filter and the NOx trap from sulfur poisoning.

Li, Liyu; King, David L.

2010-01-23T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

SELECTIVE NOx RECIRCULATION FOR STATIONARY LEAN-BURN NATURAL GAS ENGINES  

DOE Green Energy (OSTI)

The research program conducted at the West Virginia University Engine and Emissions Research Laboratory (EERL) is working towards the verification and optimization of an approach to remove nitric oxides from the exhaust gas of lean burn natural gas engines. This project was sponsored by the US Department of Energy, National Energy Technology Laboratory (NETL) under contract number: DE-FC26-02NT41608. Selective NOx Recirculation (SNR) involves three main steps. First, NOx is adsorbed from the exhaust stream, followed by periodic desorption from the aftertreatment medium. Finally the desorbed NOx is passed back into the intake air stream and fed into the engine, where a percentage of the NOx is decomposed. This reporting period focuses on the NOx decomposition capability in the combustion process. Although researchers have demonstrated NOx reduction with SNR in other contexts, the proposed program is needed to further understand the process as it applies to lean burn natural gas engines. SNR is in support of the Department of Energy goal of enabling future use of environmentally acceptable reciprocating natural gas engines through NOx reduction under 0.1 g/bhp-hr. The study of decomposition of oxides of nitrogen (NOx) during combustion in the cylinder was conducted on a 1993 Cummins L10G 240 hp lean burn natural gas engine. The engine was operated at different air/fuel ratios, and at a speed of 800 rpm to mimic a larger bore engine. A full scale dilution tunnel and analyzers capable of measuring NOx, CO{sub 2}, CO, HC concentrations were used to characterize the exhaust gas. Commercially available nitric oxide (NO) was used to mimic the NOx stream from the desorption process through a mass flow controller and an injection nozzle. The same quantity of NOx was injected into the intake and exhaust line of the engine for 20 seconds at various steady state engine operating points. NOx decomposition rates were obtained by averaging the peak values at each set point minus the baseline and finding the ratio between the injected NO amounts. It was observed that the air/fuel ratio, injected NO quantity and engine operating points affected the NOx decomposition rates of the natural gas engine. A highest NOx decomposition rate of 27% was measured from this engine. A separate exploratory tests conducted with a gasoline engine with a low air/fuel ratio yielded results that suggested, that high NOx decomposition rates may be possible if a normally lean burn engine were operated at conditions closer to stoichiometric, with high exhaust gas recirculation (EGR) for a brief period of time during the NOx decomposition phase and with a wider range of air/fuel ratios. Chemical kinetic model predictions using CHEMKIN were performed to relate the experimental data with the established rate and equilibrium models. NOx decomposition rates from 35% to 42% were estimated using the CHEMKIN software. This provided insight on how to maximize NOx decomposition rates for a large bore engine. In the future, the modeling will be used to examine the effect of higher NO{sub 2}/NO ratios that are associated with lower speed and larger bore lean burn operation.

Nigel Clark; Gregory Thompson; Richard Atkinson; Chamila Tissera; Matt Swartz; Emre Tatli; Ramprabhu Vellaisamy

2005-01-01T23:59:59.000Z

22

Development of a closed-loop, lean-burn natural gas engine control system. Final report, February 1993-December 1995  

SciTech Connect

The overall objective of this project was to develop a closed-loop, lean-burn control system for medium and heavy duty, lean-burn, gaseous fueled engines. The closed-loop F/A ratio control system was designed to provide diesel engine-like performance and fuel economy, and take advantage of the emissions benefits of a gaseous fueled engine. The control system was designed to have the processing power and I/O capacity to accommodate the engine Original Equipment Manufacturers (OEM`s).

Morris, D.A.

1996-06-01T23:59:59.000Z

23

Improved performance of NOx reduction by H2 and CO over a Pd/Al2O3 catalyst at low temperatures under lean-burn conditions  

E-Print Network (OSTI)

Improved performance of NOx reduction by H2 and CO over a Pd/Al2O3 catalyst at low temperatures 4 June 2004; accepted 6 June 2004 Available online 28 July 2004 Abstract Selective reduction of NOx of lean-burn vehicle exhaust. Macleod and Lambert [9] found that Pd/Al2O3 promotes lean NOx reduction

Gulari, Erdogan

24

Testing of a new aftertreatment system for lean burn direct injected gasoline engines.  

E-Print Network (OSTI)

??A gasoline direct injected engine operating under lean conditions can offer a reduction in fuel consumption and a reduction of CO2 emissions but meanwhile suffer… (more)

Thulin, Andeas

2011-01-01T23:59:59.000Z

25

Advanced Nuclear Fuel Concepts for Minor Actinide Burning  

Science Conference Proceedings (OSTI)

Abstract Scope, New fuel cycle strategies entail advanced nuclear fuel concepts. This especially applies for the burning of minor actinides in a fast reactor cycle ...

26

Selective NOx Recirculation for Stationary Lean-Burn Natural Gas Engines  

Science Conference Proceedings (OSTI)

Selective NOx Recirculation (SNR) involves cooling the engine exhaust gas and then adsorbing the oxides of nitrogen (NOx) from the exhaust stream, followed by the periodic desorption of NOx. By returning the desorbed, concentrated NOx into the engine intake and through the combustion chamber, a percentage of the NOx is decomposed during the combustion process. An initial study of NOx decomposition during lean-burn combustion was concluded in 2004 using a 1993 Cummins L10G 240hp natural gas engine. It was observed that the air/fuel ratio, injected NO (nitric oxide) quantity and engine operating points affected NOx decomposition rates of the engine. Chemical kinetic modeling results were also used to determine optimum NOx decomposition operating points and were published in the 2004 annual report. A NOx decomposition rate of 27% was measured from this engine under lean-burn conditions while the software model predicted between 35-42% NOx decomposition for similar conditions. A later technology 1998 Cummins L10G 280hp natural gas engine was procured with the assistance of Cummins Inc. to replace the previous engine used for 2005 experimental research. The new engine was equipped with an electronic fuel management system with closed-loop control that provided a more stable air/fuel ratio control and improved the repeatability of the tests. The engine was instrumented with an in-cylinder pressure measurement system and electronic controls, and was adapted to operate over a range of air/fuel ratios. The engine was connected to a newly commissioned 300hp alternating current (AC) motoring dynamometer. The second experimental campaign was performed to acquire both stoichiometric and slightly rich (0.97 lambda ratio) burn NOx decomposition rates. Effects of engine load and speed on decomposition were quantified, but Exhaust Gas Recirculation (EGR) was not varied independently. Decomposition rates of up to 92% were demonstrated. Following recommendations at the 2004 ARES peer review meeting at Argonne National Laboratories, in-cylinder pressure was measured to calculate engine indicated mean effective pressure (IMEP) changes due to NOx injections and EGR variations, and to observe conditions in the cylinder. The third experimental campaign gathered NOx decomposition data at 800, 1200 and 1800 rpm. EGR was added via an external loop, with EGR ranging from zero to the point of misfire. The air/fuel ratio was set at both stoichiometric and slightly rich conditions, and NOx decomposition rates were calculated for each set of runs. Modifications were made to the engine exhaust manifold to record individual exhaust temperatures. The three experimental campaigns have provided the data needed for a comprehensive model of NOx decomposition during the combustion process, and data have confirmed that there was no significant impact of injected NO on in-cylinder pressure. The NOx adsorption system provided by Sorbent Technologies Corp. (Twinsburg, OH), comprised a NOx adsorber, heat exchanger and a demister. These components were connected to the engine, and data were gathered to show both the adsorption of NOx from the engine, and desorption of NOx from the carbon-based sorbent material back into the engine intake, using a heated air stream. In order to quantify the NOx adsorption/desorption characteristics of the sorbent material, a bench top adsorption system was constructed and instrumented with thermocouples and the system output was fed into a NOx analyzer. The temperature of this apparatus was controlled while gathering data on the characteristics of the sorbent material. These data were required for development of a system model. Preliminary data were gathered in 2005, and will continue in early 2006. To assess the economic benefits of the proposed SNR technology the WVU research team has been joined in the last quarter by Dr Richard Turton (WVU-Chemical Engineering), who is modeling, sizing and costing the major components. The tasks will address modeling and preliminary design of the heat exchanger, demister and NOx sorbent chamber s

Nigel Clark; Gregory Thompson; Richard Atkinson; Richard Turton; Chamila Tissera; Emre Tatli; Andy Zimmerman

2005-12-28T23:59:59.000Z

27

Knock behavior of a lean-burn hydrogen-enhanced engine concept  

E-Print Network (OSTI)

Experiments to identify the knock trends of lean gasoline-air mixtures, and such mixtures enhanced with hydrogen (H2) and carbon monoxide (CO), were performed on a single-cylinder research engine with boosting capability. ...

Topinka, Jennifer A. (Jennifer Ann), 1977-

2003-01-01T23:59:59.000Z

28

Lean-Burn Stationary Natural Gas Reciprocating Engine Operation with a Prototype Miniature Diode Side Pumped Passively Q-switched Laser Spark Plug  

DOE Green Energy (OSTI)

To meet the ignition system needs of large bore lean burn stationary natural gas engines a laser diode side pumped passively Q-switched laser igniter was developed and used to ignite lean mixtures in a single cylinder research engine. The laser design was produced from previous work. The in-cylinder conditions and exhaust emissions produced by the miniaturized laser were compared to that produced by a laboratory scale commercial laser system used in prior engine testing. The miniaturized laser design as well as the combustion and emissions data for both laser systems was compared and discussed. It was determined that the two laser systems produced virtually identical combustion and emissions data.

McIntyre, D.L.; Woodruff, S.D.; McMillian, M.H.; Richardson, S.W.; Gautam, Mridul

2008-04-01T23:59:59.000Z

29

Multi-stage selection catalytic reduction of NO{sub x} in lean burn engine exhaust  

DOE Green Energy (OSTI)

Recent studies suggest that the conversion of NO to NO{sub 2} is an important intermediate step in the selective catalytic reduction (SCR) of NO{sub x} to N{sub 2}. These studies have prompted the development of schemes that use an oxidation catalyst to convert NO to NO{sub 2}, followed by a reduction catalyst to convert NO{sub 2} to N{sub 2}. Multi-stage SCR offers high NO{sub x} reduction efficiency from catalysts that, separately, are not very active for reduction of NO, and alleviates the problem of selectivity between NO reduction and hydrocarbon oxidation. A plasma can also be used to oxidize NO to NO{sub 2}. This paper compares the multi-stage catalytic scheme with the plasma-assisted catalytic scheme for reduction of NO{sub x} in lean-bum engine exhausts. The advantages of plasma oxidation over catalytic oxidation are presented.

Penetrante, B.M.; Hsiao, M.O.; Merritt, B.T.; Vogling, E.

1998-01-26T23:59:59.000Z

30

System Study of Rich Catalytic/Lean burn (RCL) Catalytic Combustion for Natural Gas and Coal-Derived Syngas Combustion Turbines  

SciTech Connect

Rich Catalytic/Lean burn (RCL{reg_sign}) technology has been successfully developed to provide improvement in Dry Low Emission gas turbine technology for coal derived syngas and natural gas delivering near zero NOx emissions, improved efficiency, extending component lifetime and the ability to have fuel flexibility. The present report shows substantial net cost saving using RCL{reg_sign} technology as compared to other technologies both for new and retrofit applications, thus eliminating the need for Selective Catalytic Reduction (SCR) in combined or simple cycle for Integrated Gasification Combined Cycle (IGCC) and natural gas fired combustion turbines.

Shahrokh Etemad; Lance Smith; Kevin Burns

2004-12-01T23:59:59.000Z

31

A Compact Advanced Burning Plasma Experiment Dale M. Meade and Robert D. Woolley  

E-Print Network (OSTI)

A Compact Advanced Burning Plasma Experiment Dale M. Meade and Robert D. Woolley Princeton Plasma and optimization of a burning plasma. The achievement of an ignited (Q # 10) plasma will allow these scientific OBJECTIVES AND REQUIREMENTS FOR AN ADVANCED BURNING PLASMA PHYSICS EXPERIMENT The primary physics objectives

32

A Compact Advanced Burning Plasma Experiment Dale M. Meade and Robert D. Woolley  

E-Print Network (OSTI)

A Compact Advanced Burning Plasma Experiment Dale M. Meade and Robert D. Woolley Princeton Plasma and optimization of a burning plasma. The achievement of an ignited (Q 10) plasma will allow these scientific OBJECTIVES AND REQUIREMENTS FOR AN ADVANCED BURNING PLASMA PHYSICS EXPERIMENT The primary physics objectives

33

The effects of spark ignition parameters on the lean burn limit of natural gas combustion in an internal combustion engine  

E-Print Network (OSTI)

A full factorial experiment was conducted to determine the effects of internal combustion engine ignition parameters on the air-fuel ratio (A/F) lean limit of combustion with compressed natural gas (CNG). Spark electrical characteristics (voltage, current, power, energy and duration), electrode design, electrode gap and compression ratio were the control variables and A/F lean limit, fuel consumption and hydrocarbon and oxides of nitrogen emission concentrations were the response variables. Experiments were performed on a General Motors' 2.2 liter four cylinder engine. Spark electrical characteristics were varied by applying various primary voltages and secondary resistances to the production inductive ignition system, with the engine operating at two operating conditions, a light load and a road load, and with two compression ratios. Cylinder pressure data was acquired to quantify load and combustion stability. Spark electrical characteristics were acquired with a digital oscilloscope to quantify secondary spark electrical characteristics. The results indicated that the response variables were generally insensitive to all the control variables, except for compression ratio. However, contrary to the literature, the A/F lean limit and fuel efficiency degraded with a higher compression ratio. Single and multi-variant linear regressions were studied between the A/F lean limit and the spark electrical characteristics. The only statistically significant and notable finding was a multi-variant linear regression of the A/F lean limit to increasing spark duration and decreasing spark energy at the road load operating condition. Statistical significance of the effect of the ignition system control variables on the response variables was higher at the road load than the light load operating condition. Emissions responded as expected with the higher compression ratio.

Chlubiski, Vincent Daniel

1997-01-01T23:59:59.000Z

34

Lean Flame Stabilization Ring - Lawrence Berkeley National ...  

Robert Cheng at Berkeley National Laboratory has developed a means for retrofitting existing burners to burn lean, premixed natural gas/air mixtures ...

35

Lean Gasoline Engine Reductant Chemistry During Lean NOx Trap Regeneration  

Science Conference Proceedings (OSTI)

Lean NOx Trap (LNT) catalysts can effectively reduce NOx from lean engine exhaust. Significant research for LNTs in diesel engine applications has been performed and has led to commercialization of the technology. For lean gasoline engine applications, advanced direct injection engines have led to a renewed interest in the potential for lean gasoline vehicles and, thereby, a renewed demand for lean NOx control. To understand the gasoline-based reductant chemistry during regeneration, a BMW lean gasoline vehicle has been studied on a chassis dynamometer. Exhaust samples were collected and analyzed for key reductant species such as H2, CO, NH3, and hydrocarbons during transient drive cycles. The relation of the reductant species to LNT performance will be discussed. Furthermore, the challenges of NOx storage in the lean gasoline application are reviewed.

Choi, Jae-Soon [ORNL; Prikhodko, Vitaly Y [ORNL; Partridge Jr, William P [ORNL; Parks, II, James E [ORNL; Norman, Kevin M [ORNL; Huff, Shean P [ORNL; Chambon, Paul H [ORNL; Thomas, John F [ORNL

2010-01-01T23:59:59.000Z

36

LEAN URST  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration. SAND # 2013-5819P LEAN URST

37

Lean NOx Trap Catalysis for Lean Natural Gas Engine Applications  

Science Conference Proceedings (OSTI)

Distributed energy is an approach for meeting energy needs that has several advantages. Distributed energy improves energy security during natural disasters or terrorist actions, improves transmission grid reliability by reducing grid load, and enhances power quality through voltage support and reactive power. In addition, distributed energy can be efficient since transmission losses are minimized. One prime mover for distributed energy is the natural gas reciprocating engine generator set. Natural gas reciprocating engines are flexible and scalable solutions for many distributed energy needs. The engines can be run continuously or occasionally as peak demand requires, and their operation and maintenance is straightforward. Furthermore, system efficiencies can be maximized when natural gas reciprocating engines are combined with thermal energy recovery for cooling, heating, and power applications. Expansion of natural gas reciprocating engines for distributed energy is dependent on several factors, but two prominent factors are efficiency and emissions. Efficiencies must be high enough to enable low operating costs, and emissions must be low enough to permit significant operation hours, especially in non-attainment areas where emissions are stringently regulated. To address these issues the U.S. Department of Energy and the California Energy Commission launched research and development programs called Advanced Reciprocating Engine Systems (ARES) and Advanced Reciprocating Internal Combustion Engines (ARICE), respectively. Fuel efficiency and low emissions are two primary goals of these programs. The work presented here was funded by the ARES program and, thus, addresses the ARES 2010 goals of 50% thermal efficiency (fuel efficiency) and engines are being pursued. Approaches include: stoichiometric engine operation with exhaust gas recirculation and three-way catalysis, advanced combustion modes such as homogeneous charge compression ignition, and extension of the lean combustion limit with advanced ignition concepts and/or hydrogen mixing. The research presented here addresses the technical approach of combining efficient lean spark-ignited natural gas combustion with low emissions obtained from a lean NOx trap catalyst aftertreatment system. This approach can be applied to current lean engine technology or advanced lean engines that may result from related efforts in lean limit extension. Furthermore, the lean NOx trap technology has synergy with hydrogen-assisted lean limit extension since hydrogen is produced from natural gas during the lean NOx trap catalyst system process. The approach is also applicable to other lean engines such as diesel engines, natural gas turbines, and lean gasoline engines; other research activities have focused on those applications. Some commercialization of the technology has occurred for automotive applications (both diesel and lean gasoline engine vehicles) and natural gas turbines for stationary power. The research here specifically addresses barriers to commercialization of the technology for large lean natural gas reciprocating engines for stationary power. The report presented here is a comprehensive collection of research conducted by Oak Ridge National Laboratory (ORNL) on lean NOx trap catalysis for lean natural gas reciprocating engines. The research was performed in the Department of Energy's ARES program from 2003 to 2007 and covers several aspects of the technology. All studies were conducted at ORNL on a Cummins C8.3G+ natural gas engine chosen based on industry input to simulate large lean natural gas engines. Specific technical areas addressed by the research include: NOx reduction efficiency, partial oxidation and reforming chemistry, and the effects of sulfur poisons on the partial oxidation

Parks, II, James E [ORNL; Storey, John Morse [ORNL; Theiss, Timothy J [ORNL; Ponnusamy, Senthil [ORNL; Ferguson, Harley Douglas [ORNL; Williams, Aaron M [ORNL; Tassitano, James B [ORNL

2007-09-01T23:59:59.000Z

38

Lean NOx Trap Catalysis for Lean Natural Gas Engine Applications  

DOE Green Energy (OSTI)

Distributed energy is an approach for meeting energy needs that has several advantages. Distributed energy improves energy security during natural disasters or terrorist actions, improves transmission grid reliability by reducing grid load, and enhances power quality through voltage support and reactive power. In addition, distributed energy can be efficient since transmission losses are minimized. One prime mover for distributed energy is the natural gas reciprocating engine generator set. Natural gas reciprocating engines are flexible and scalable solutions for many distributed energy needs. The engines can be run continuously or occasionally as peak demand requires, and their operation and maintenance is straightforward. Furthermore, system efficiencies can be maximized when natural gas reciprocating engines are combined with thermal energy recovery for cooling, heating, and power applications. Expansion of natural gas reciprocating engines for distributed energy is dependent on several factors, but two prominent factors are efficiency and emissions. Efficiencies must be high enough to enable low operating costs, and emissions must be low enough to permit significant operation hours, especially in non-attainment areas where emissions are stringently regulated. To address these issues the U.S. Department of Energy and the California Energy Commission launched research and development programs called Advanced Reciprocating Engine Systems (ARES) and Advanced Reciprocating Internal Combustion Engines (ARICE), respectively. Fuel efficiency and low emissions are two primary goals of these programs. The work presented here was funded by the ARES program and, thus, addresses the ARES 2010 goals of 50% thermal efficiency (fuel efficiency) and <0.1 g/bhp-hr emissions of oxides of nitrogen (NOx). A summary of the goals for the ARES program is given in Table 1-1. ARICE 2007 goals are 45% thermal efficiency and <0.015 g/bhp-hr NOx. Several approaches for improving the efficiency and emissions of natural gas reciprocating engines are being pursued. Approaches include: stoichiometric engine operation with exhaust gas recirculation and three-way catalysis, advanced combustion modes such as homogeneous charge compression ignition, and extension of the lean combustion limit with advanced ignition concepts and/or hydrogen mixing. The research presented here addresses the technical approach of combining efficient lean spark-ignited natural gas combustion with low emissions obtained from a lean NOx trap catalyst aftertreatment system. This approach can be applied to current lean engine technology or advanced lean engines that may result from related efforts in lean limit extension. Furthermore, the lean NOx trap technology has synergy with hydrogen-assisted lean limit extension since hydrogen is produced from natural gas during the lean NOx trap catalyst system process. The approach is also applicable to other lean engines such as diesel engines, natural gas turbines, and lean gasoline engines; other research activities have focused on those applications. Some commercialization of the technology has occurred for automotive applications (both diesel and lean gasoline engine vehicles) and natural gas turbines for stationary power. The research here specifically addresses barriers to commercialization of the technology for large lean natural gas reciprocating engines for stationary power. The report presented here is a comprehensive collection of research conducted by Oak Ridge National Laboratory (ORNL) on lean NOx trap catalysis for lean natural gas reciprocating engines. The research was performed in the Department of Energy's ARES program from 2003 to 2007 and covers several aspects of the technology. All studies were conducted at ORNL on a Cummins C8.3G+ natural gas engine chosen based on industry input to simulate large lean natural gas engines. Specific technical areas addressed by the research include: NOx reduction efficiency, partial oxidation and reforming chemistry, and the effects of sulfur poisons on the partial oxidation

Parks, II, James E [ORNL; Storey, John Morse [ORNL; Theiss, Timothy J [ORNL; Ponnusamy, Senthil [ORNL; Ferguson, Harley Douglas [ORNL; Williams, Aaron M [ORNL; Tassitano, James B [ORNL

2007-09-01T23:59:59.000Z

39

Development of Burning Plasma and Advanced Scenarios in the DIII-D Tokamak  

SciTech Connect

Significant progress in the development of burning plasma scenarios, steady-state scenarios at high fusion performance, and basic tokamak physics has been made by the DIII-D Team. Discharges similar to the ITER baseline scenario have demonstrated normalized fusion performance nearly 50% higher than required for Q = 10 in ITER, under stationary conditions. Discharges that extrapolate to Q {approx} 10 for longer than one hour in ITER at reduced current have also been demonstrated in DIII-D under stationary conditions. Proof of high fusion performance with full noninductive operation has been obtained. Underlying this work are studies validating approaches to confinement extrapolation, disruption avoidance and mitigation, tritium retention, ELM avoidance, and operation above the no-wall pressure limit. In addition, the unique capabilities of the DIII-D facility have advanced studies of the sawtooth instability with unprecedented time and space resolution, threshold behavior in the electron heat transport, and rotation in plasmas in the absence of external torque.

Luce, T C

2004-12-01T23:59:59.000Z

40

Development of Burning Plasma and Advanced Scenarios in the DIII-D Tokamak  

SciTech Connect

Significant progress in the development of burning plasma scenarios, steady-state scenarios at high fusion performance, and basic tokamak physics has been made by the DIII-D Team. Discharges similar to the ITER baseline scenario have demonstrated normalized fusion performance nearly 50% higher than required for Q = 10 in ITER, under stationary conditions. Discharges that extrapolate to Q {approx} 10 for longer than one hour in ITER at reduced current have also been demonstrated in DIII-D under stationary conditions. Proof of high fusion performance with full noninductive operation has been obtained. Underlying this work are studies validating approaches to confinement extrapolation, disruption avoidance and mitigation, tritium retention, ELM avoidance, and operation above the no-wall pressure limit. In addition, the unique capabilities of the DIII-D facility have advanced studies of the sawtooth instability with unprecedented time and space resolution, threshold behavior in the electron heat transport, and rotation in plasmas in the absence of external torque.

Luce, T C

2004-10-18T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Role of the nature of the support (alumina or silica), of the support porosity, and of the Pt dispersion in the selective reduction of NO by C{sub 3}H{sub 6} under lean-burn conditions  

SciTech Connect

During selective reduction of NO{sub x} under lean-burn conditions, a Pt particle size dependency has previously been observed with various supports. In this study, the authors have examined the influence of various parameters over a large range of initial metal dispersion: nature of the support (silica or alumina), support porosity, presence of impurities (particularly chlorine or sulfur), nature of the platinum precursor salt, and Pt particle size distribution. Furthermore, the authors have considered the mean particle size after sintering under the reactant mixture up to 773 K. Of the factors considered, only the Pt dispersion is of key importance. The intrinsic activity increases with decreasing dispersion (measured initially or after reaction) for each of the main reactions: reduction of NO into N{sub 2} or N{sub 2}O, oxidation of NO into NO{sub 2}, or oxidation of C{sub 3}H{sub 6} into CO{sub 2}. The dispersion does not clearly affect the selectivity.

Denton, P.; Giroir-Fendler, A.; Praliaud, H.; Primet, M.

2000-01-25T23:59:59.000Z

42

NETL: NETL - Media Backgrounder: Laser spark ignition for lean...  

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

ratios and three timing conditions were compared. The NETL research provides the first lean-burn natural gas engine data using a laser-spark ignition source and the first...

43

HEART SMART NUTRITION Be a Lean Machine  

E-Print Network (OSTI)

Lesson 6 HEART SMART NUTRITION Be a Lean Machine This Heart Smart Nutrition series can help you Heart, Lung and Blood Institute). Physical activity increases your metabolic rate, which helps to burn more calories. Plus it helps the heart and lungs function to full capacity. Exercise also helps raise

44

Lean blowoff detection sensor  

DOE Patents (OSTI)

Apparatus and method for detecting incipient lean blowoff conditions in a lean premixed combustion nozzle of a gas turbine. A sensor near the flame detects the concentration of hydrocarbon ions and/or electrons produced by combustion and the concentration monitored as a function of time are used to indicate incipient lean blowoff conditions.

Thornton, Jimmy (Morgantown, WV); Straub, Douglas L. (Morgantown, WV); Chorpening, Benjamin T. (Morgantown, WV); Huckaby, David (Morgantown, WV)

2007-04-03T23:59:59.000Z

45

Catalysts for lean burn engine exhaust abatement  

DOE Patents (OSTI)

The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200.degree. C. to about 400.degree. C.

Ott, Kevin C. (Los Alamos, NM); Clark, Noline C. (Jemez Springs, NM); Paffett, Mark T. (Los Alamos, NM)

2003-01-01T23:59:59.000Z

46

Catalysts For Lean Burn Engine Exhaust Abatement  

DOE Patents (OSTI)

The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200.degree. C. to about 400.degree. C.

Ott, Kevin C. (Los Alamos, NM); Clark, Noline C. (Jemez Springs, NM); Paffett, Mark T. (Los Alamos, NM)

2004-04-06T23:59:59.000Z

47

Simulation of lean premixed turbulent combustion  

DOE Green Energy (OSTI)

There is considerable technological interest in developingnew fuel-flexible combustion systems that can burn fuels such ashydrogenor syngas. Lean premixed systems have the potential to burn thesetypes of fuels with high efficiency and low NOx emissions due to reducedburnt gas temperatures. Although traditional scientific approaches basedon theory and laboratory experiment have played essential roles indeveloping our current understanding of premixed combustion, they areunable to meet the challenges of designing fuel-flexible lean premixedcombustion devices. Computation, with itsability to deal with complexityand its unlimited access to data, hasthe potential for addressing thesechallenges. Realizing this potential requires the ability to perform highfidelity simulations of turbulent lean premixed flames under realisticconditions. In this paper, we examine the specialized mathematicalstructure of these combustion problems and discuss simulation approachesthat exploit this structure. Using these ideas we can dramatically reducecomputational cost, making it possible to perform high-fidelitysimulations of realistic flames. We illustrate this methodology byconsidering ultra-lean hydrogen flames and discuss how this type ofsimulation is changing the way researchers study combustion.

Bell, John B.; Day, Marcus S.; Almgren, Ann S.; Lijewski, MichaelJ.; Rendleman, Charles A.; Cheng, Robert K.; Shepherd, Ian G.

2006-06-25T23:59:59.000Z

48

Lean effectiveness model for products and services : servicing existing systems in aerospace and technology  

E-Print Network (OSTI)

Enterprises undergo transformation for more efficient and effective performance and growth. The Lean Enterprise Self Assessment Tool (LESAT) is a product of the Lean Advancement Initiative (LAI) and the Massachusetts ...

Srivastava, Tina Prabha

2012-01-01T23:59:59.000Z

49

Final Report for SERDP Project RC-1649: Advanced Chemical Measurements of Smoke from DoD-prescribed Burns  

Science Conference Proceedings (OSTI)

Objectives: Project RC-1649, “Advanced Chemical Measurement of Smoke from DoD-prescribed Burns” was undertaken to use advanced instrumental techniques to study in detail the particulate and vapor-phase chemical composition of the smoke that results from prescribed fires used as a land management tool on DoD bases, particularly bases in the southeastern U.S. The statement of need (SON) called for “(1) improving characterization of fuel consumption” and “(2) improving characterization of air emissions under both flaming and smoldering conditions with respect to volatile organic compounds, heavy metals, and reactive gases.” The measurements and fuels were from several bases throughout the southeast (Camp Lejeune, Ft. Benning, and Ft. Jackson) and were carried out in collaboration and conjunction with projects 1647 (models) and 1648 (particulates, SW bases). Technical Approach: We used an approach that featured developing techniques for measuring biomass burning emission species in both the laboratory and field and developing infrared (IR) spectroscopy in particular. Using IR spectroscopy and other methods, we developed emission factors (EF, g of effluent per kg of fuel burned) for dozens of chemical species for several common southeastern fuel types. The major measurement campaigns were laboratory studies at the Missoula Fire Sciences Laboratory (FSL) as well as field campaigns at Camp Lejeune, NC, Ft. Jackson, SC, and in conjunction with 1648 at Vandenberg AFB, and Ft. Huachuca. Comparisons and fusions of laboratory and field data were also carried out, using laboratory fuels from the same bases. Results: The project enabled new technologies and furthered basic science, mostly in the area of infrared spectroscopy, a broadband method well suited to biomass burn studies. Advances in hardware, software and supporting reference data realized a nearly 20x improvement in sensitivity and now provide quantitative IR spectra for potential detection of ~60 new species and actual field quantification of several new species such as nitrous acid, glycolaldehyde, ?-/?-pinene and D-limonene. The new reference data also permit calculation of the global warming potential (GWP) of the greenhouse gases by enabling 1) detection of their ambient concentrations, and 2) quantifying their ability to absorb IR radiation.

Johnson, Timothy J.; Weise, David; Lincoln, E. N.; Sams, Robert L.; Cameron, Melanie; Veres, Patrick; Yokelson, Robert J.; Urbanski, Shawn; Profeta, Luisa T.; Williams, S.; Gilman, Jessica; Kuster, W. C.; Akagi, Sheryl; Stockwell, Chelsea E.; Mendoza, Albert; Wold, Cyle E.; Warneke, Carsten; de Gouw, Joost A.; Burling, Ian R.; Reardon, James; Schneider, Matthew D.; Griffith, David WT; Roberts, James M.

2013-12-17T23:59:59.000Z

50

Lean Six-Sigma Training  

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

Presentation Summary Presentation Summary *White Belt Training *What is Lean? *What is Six Sigma? *What Is Lean Six Sigma *What Is Lean Six Sigma *Case Study *DMAIC * Next Steps...

51

Strategies for Lean Product Development  

E-Print Network (OSTI)

The essence of lean is very simple, but from a research and implementation point of view overwhelming. Lean is the search for perfection through the elimination of waste and the insertion of practices that contribute to ...

Walton, Myles

52

Burns Prevention  

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

Burns Burns Burns can result from everyday things and activities in your home. The most common causes of burns are from scalds (steam, hot bath water, hot drinks and foods), fire, chemicals, electricity and overexposure to the sun. Some burns may be more serious than others. The severity of the burn is based on the depth of the burn. First degree burns are the least severe, and third degree burns are the most severe. Call 911 or seek medical attention if you are unsure of how severe your burn is. All burns are susceptible to tetanus (lockjaw). Get a tetanus shot every 10 years. If your last shot was 5 years ago, talk to your doctor - you may need a booster shot. Causes of Burns: Scalds Scalding injuries and burns are caused by hot tap water, hot beverages and food, and steam.

53

Lean Software Development: A Tutorial  

Science Conference Proceedings (OSTI)

Lean Software Development” has become a popular term over the last few years. This tutorial describes where it comes from, what it means, how it relates to well-known agile development practices, and how it will evolve in the future. Keywords: Programming,Software development,Product development,Agile manufacturing,Tutorials,Assembly,Design methodology,Product life cycle management,Toyota,lean,agile,scrum,Kanban,XP,lean startup,continuous delivery,design thinking

Mary Poppendieck; Michael A. Cusumano

2012-09-01T23:59:59.000Z

54

Lean NOx catalysis for gasoline fueled European cars  

SciTech Connect

There is increasing interest in operating gasoline fueled passenger cars lean of the stoichiometric air/fuel (A/F) ratio to improve fuel economy. These types of engines will operate at lean A/F ratios while cruising at partial load, and return to stoichiometric or even rich conditions when more power is required. The challenge for the engine and catalyst manufacturer is to develop a system which will combine the high activity rates of a state-of-the-art three-way catalyst (TWC) with the ability to reduce nitrogen oxides (NOx) in the presence of excess oxygen. The objective is to achieve the future legislative limits (EURO III/IV) in the European Union. Recent developments in automotive pollution control catalysis show that the use of NOx adsorption materials is a suitable way to reduce NOx emissions of gasoline-fueled lean-burn engines. However, the primary task for the implementation of this technology in the European market will be to improve the catalyst`s high-temperature stability and to decrease its susceptibility to sulfur poisoning. Outlined here are results of a recent R and D program to achieve NOx reduction under lean-burn gasoline engine conditions. Model gas test results as well as engine bench data are used for discussion of the parameters which control NOx adsorption efficiency under various conditions.

NONE

1997-02-01T23:59:59.000Z

55

Lean enterprise in the construction industry  

E-Print Network (OSTI)

This thesis explores the application of the Lean Enterprise Model (LEM) to construction firms. LEM is a framework derived from lean manufacturing principles by MIT's Lean Aerospace Initiative (LAI) for the aerospace industry. ...

Marchini-Blanco, Juan, 1971-

2004-01-01T23:59:59.000Z

56

Information and Communication in Lean Product Development  

E-Print Network (OSTI)

In this thesis, the implications and influences that information and communication impose on lean product development in general, as well as the development of a lean Product Development Value Stream Display (lean PDVSD) ...

Graebsch, Martin

57

New Computer Codes Unlock the Secrets of Cleaner Burning Coal  

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

Codes Unlock the Secrets of Cleaner Burning Coal New Computer Codes Unlock the Secrets of Cleaner Burning Coal March 29, 2012 | Tags: Advanced Scientific Computing Research (ASCR),...

58

A design strategy applied to sulfur resistant lean NOx̳ automotive catalysts  

E-Print Network (OSTI)

Catalyst poisoning due to sulfur compounds derived from fuel sulfur presents a major challenge, intractable thus far, to development of many advanced technologies for automotive catalysts such as the lean NOx, trap. Under ...

Tang, Hairong

2005-01-01T23:59:59.000Z

59

Reduction of Nitrogen Oxide Emissions for lean Burn Engine Technology  

DOE Green Energy (OSTI)

reactor tests to engine laboratory tests of full-scale prototype catalysts, and microstructural characterization of catalyst material before and after test stand and/or engine testing.

McGill, R.N.

1998-08-04T23:59:59.000Z

60

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 "advanced lean burn" 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

Lean, Energy, and Savings: Energy Impacts of Lean Manufacturing  

E-Print Network (OSTI)

Most utility energy efficiency programs for industry focus on equipment replacement. A key result is confidence in the amount of resulting energy savings. Utility programs focusing on behavior - that is, using a piece of equipment more optimally - often suffer from a perceived inability to accurately quantify resulting savings. The last few decades have seen a proliferation of Lean Manufacturing practices across industry, where organizations focus on eliminating waste. Energy is often a component of these wastes, but challenges in quantifying results have slowed the inclusion of Lean in utility energy efficiency programs. In 2011 the Northwest Energy Efficiency Alliance completed an effort that applied energy concepts within the Manufacturing Extension Partnership organizations of the Northwest. A critical project component was quantifying the energy savings from a Lean implementation at a food processing facility. This paper provides details on that project's approach, results, and next steps.

Milward, R.; Gilless, C.; Brown, K.

2013-01-01T23:59:59.000Z

62

MFE Burning Plasmas Innovative Confinement Concepts (ICCs)  

E-Print Network (OSTI)

MFE Burning Plasmas and Innovative Confinement Concepts (ICCs) Bick Hooper LLNL Presentation power requires: · A burning plasma experiment · An advancing portfolio of ICCs · Plasma physics unified Improved Configurations Magnetic Configurations Knowledge Base Burning Plasma Phys. & Tech. Knowledge Base

63

European Lean Gasoline Direct Injection Vehicle Benchmark  

DOE Green Energy (OSTI)

Lean Gasoline Direct Injection (LGDI) combustion is a promising technical path for achieving significant improvements in fuel efficiency while meeting future emissions requirements. Though Stoichiometric Gasoline Direct Injection (SGDI) technology is commercially available in a few vehicles on the American market, LGDI vehicles are not, but can be found in Europe. Oak Ridge National Laboratory (ORNL) obtained a European BMW 1-series fitted with a 2.0l LGDI engine. The vehicle was instrumented and commissioned on a chassis dynamometer. The engine and after-treatment performance and emissions were characterized over US drive cycles (Federal Test Procedure (FTP), the Highway Fuel Economy Test (HFET), and US06 Supplemental Federal Test Procedure (US06)) and steady state mappings. The vehicle micro hybrid features (engine stop-start and intelligent alternator) were benchmarked as well during the course of that study. The data was analyzed to quantify the benefits and drawbacks of the lean gasoline direct injection and micro hybrid technologies from a fuel economy and emissions perspectives with respect to the US market. Additionally that data will be formatted to develop, substantiate, and exercise vehicle simulations with conventional and advanced powertrains.

Chambon, Paul H [ORNL; Huff, Shean P [ORNL; Edwards, Kevin Dean [ORNL; Norman, Kevin M [ORNL; Prikhodko, Vitaly Y [ORNL; Thomas, John F [ORNL

2011-01-01T23:59:59.000Z

64

Simulation of lean premixed turbulent combustion  

E-Print Network (OSTI)

fuels such as hydrogen or syngas. Lean premixed systems havefuels such as hydrogen or syngas, which is obtained from

2008-01-01T23:59:59.000Z

65

Integrating Energy Management and Lean Manufacturing  

E-Print Network (OSTI)

There is a close relationship between energy efficiency and lean manufacturing. Lean focuses on the continuous elimination of non-value added activities and waste in a manufacturing process. Energy management focuses on the continuous elimination of wasted energy in a manufacturing process. This paper will focus on industrial facilities that participated in a Power Smart Lean initiative with Manitoba Hydro. The objective of this service is to leverage lean principles by capitalizing on the synergies between lean manufacturing and energy management to increase the incorporation of energy efficiency into a manufacturing plant. Case studies are presented showing the resulting electric and gas saving opportunities from identifying and reducing wasted energy. Examples are presented to show the incidental energy savings realized by facilities that have used lean to improve productivity. Finally, case studies are discussed which demonstrate the utilization of lean approaches and tools with parallels to energy management.

Stocki, M.

2009-05-01T23:59:59.000Z

66

BURNING PLASMA NEXT STEPS: DISCUSSION OF KEY DEVELOPMENTS  

E-Print Network (OSTI)

BURNING PLASMA NEXT STEPS: DISCUSSION OF KEY DEVELOPMENTS Gerald A. Navratil Columbia University/FESAC Burning Plasma Strategy Dec 2002 NRC/NAS Interim Report on Burning Plasmas Jan 30, 2003 DOE of the physics of burning plasma, advance fusion technology, and contribute to the development of fusion energy

67

Computer-Simulation-Assisted Lean Manufacturing Training.  

E-Print Network (OSTI)

??This thesis assesses the potential of using computer simulation to aid existing lean manufacturing training methods such as lecture and live simulation. An investigation of… (more)

Wang, Luoding 1970-

2005-01-01T23:59:59.000Z

68

The burning bush  

E-Print Network (OSTI)

ISSN 1948-6596 The burning bush Fire in Mediterraneandiscussion. Pre- scription burning is used in many forest

Schwilk, Dylan W

2013-01-01T23:59:59.000Z

69

Case Study: USPS - Lean Green Teams  

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

Use of "Lean Green" teams and a Use of "Lean Green" teams and a detailed guidebook helps develop a conservation culture throughout the USPS USPS - Lean Green Teams The Postal Service's 630+ Lean Green Teams are made up of postal employees who collaborate across functions to identify and implement low- and no-cost ways to con- serve natural resources, purchase fewer consumable products, and reduce waste of all kinds. Teams are organized at the area, district, and facility levels. The teams employ on-line tools including a Lean Green Team Guide, a Green Project List, and a Green Initiative Tracking Tool that tracks both leading indicators (status of project imple- mentation) and lagging indicators (financial and environmental impacts).

70

Burning plasmas  

SciTech Connect

The fraction of fusion-reaction energy that is released in energetic charged ions, such as the alpha particles of the D-T reaction, can be thermalized within the reacting plasma and used to maintain its temperature. This mechanism facilitates the achievement of very high energy-multiplication factors Q, but also raises a number of new issues of confinement physics. To ensure satisfactory reaction operation, three areas of energetic-ion interaction need to be addressed: single-ion transport in imperfectly symmetric magnetic fields or turbulent background plasmas; energetic-ion-driven (or stabilized) collective phenomena; and fusion-heat-driven collective phenomena. The first of these topics is already being explored in a number of tokamak experiments, and the second will begin to be addressed in the D-T-burning phase of TFTR and JET. Exploration of the third topic calls for high-Q operation, which is a goal of proposed next-generation plasma-burning projects. Planning for future experiments must take into consideration the full range of plasma-physics and engineering R D areas that need to be addressed on the way to a fusion power demonstration.

Furth, H.P.; Goldston, R.J.; Zweben, S.J. (Princeton Univ., NJ (USA). Plasma Physics Lab.); Sigmar, D.J. (Massachusetts Inst. of Tech., Cambridge, MA (USA))

1990-10-01T23:59:59.000Z

71

Design factors for stable lean premix combustion  

DOE Green Energy (OSTI)

The Advanced Turbine Systems (ATS) program includes the development of low-emission combustors. Low emissions have already been achieved by premixing fuel and air to avoid the hot gas pockets produced by nozzles without premixing. While the advantages of premixed combustion have been widely recognized, turbine developers using premixed nozzles have experienced repeated problems with combustion oscillations. Left uncontrolled, these oscillations can lead to pressure fluctuations capable of damaging engine hardware. Elimination of such oscillations is often difficult and time consuming - particularly when oscillations are discovered in the last stages of engine development. To address this issue, METC is studying oscillating combustion from lean premixing fuel nozzles. These tests are providing generic information on the mechanisms that contribute to oscillating behavior in gas turbines. METC is also investigating the use of so-called {open_quotes}active{close_quotes} control of combustion oscillations. This technique periodically injects fuel pulses into the combustor to disrupt the oscillating behavior. Recent results on active combustion control are presented in Gemmen et al. (1995) and Richards et al. (1995). This paper describes the status of METC efforts to avoid oscillations through simple design changes.

Richards, G.; Yip, M.; Gemmen, R.

1995-12-31T23:59:59.000Z

72

Activities of the US Burning Plasma Organization Vice-Chair of Council,  

E-Print Network (OSTI)

is the principal coordinating body for MFE burning plasma research · It exists to advance the scientific to advance burning plasma research · Began with the 2006-7 ITER Design Review ­ US MFE community contributed

73

Considerations for Prescribed Burning  

E-Print Network (OSTI)

Considerations for Prescribed Burning NEW M EX ICO S TAE U N I V E R SI T YT Cooperative Extension prescribed burns ...................... 1 Fire effects ................................................ 3 Justification for burning ......................................... 3 Reclamation versus

Castillo, Steven P.

74

Lean Product Development: Making Waste Transparent  

E-Print Network (OSTI)

Lean manufacturing developed by Toyota is a production philosophy that focuses on streamlining of value added activities and eliminating waste within the process with the goal to better meet customer demand. It constitutes ...

Bauch, Christoph

2004-01-15T23:59:59.000Z

75

A Next Step Burning Plasma Experiment Dale M. Meade  

E-Print Network (OSTI)

A Next Step Burning Plasma Experiment Dale M. Meade Princeton Plasma Physics Laboratory Fusion). ARIES Group #12;Advanced Toroidal Physics Fusion Plasma Conditions Burning Plasma Physics 1.0 0.5 Alpha Energy #12;Magnetic Fusion Science Issues - Strongly Coupled in a Fusion (Burning) Plasma Improved

76

One-step reduced kinetics for lean hydrogen-air deflagration  

Science Conference Proceedings (OSTI)

A short mechanism consisting of seven elementary reactions, of which only three are reversible, is shown to provide good predictions of hydrogen-air lean-flame burning velocities. This mechanism is further simplified by noting that over a range of conditions of practical interest, near the lean flammability limit all reaction intermediaries have small concentrations in the important thin reaction zone that controls the hydrogen-air laminar burning velocity and therefore follow a steady state approximation, while the main species react according to the global irreversible reaction 2H{sub 2} + O{sub 2} {yields} 2H{sub 2}O. An explicit expression for the non-Arrhenius rate of this one-step overall reaction for hydrogen oxidation is derived from the seven-step detailed mechanism, for application near the flammability limit. The one-step results are used to calculate flammability limits and burning velocities of planar deflagrations. Furthermore, implications concerning radical profiles in the deflagration and reasons for the success of the approximations are clarified. It is also demonstrated that adding only two irreversible direct recombination steps to the seven-step mechanism accurately reproduces burning velocities of the full detailed mechanism for all equivalence ratios at normal atmospheric conditions and that an eight-step detailed mechanism, constructed from the seven-step mechanism by adding to it the fourth reversible shuffle reaction, improves predictions of O and OH profiles. The new reduced-chemistry descriptions can be useful for both analytical and computational studies of lean hydrogen-air flames, decreasing required computation times. (author)

Fernandez-Galisteo, D.; Sanchez, A.L. [Area de Mecanica de Fluidos, Univ. Carlos III de Madrid, Leganes 28911 (Spain); Linan, A. [ETSI Aeronauticos, Pl. Cardenal Cisneros 3, Madrid 28040 (Spain); Williams, F.A. [Dept. of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA 92093-0411 (United States)

2009-05-15T23:59:59.000Z

77

Lean Premixed Flame Stability Investigations  

E-Print Network (OSTI)

Fellowship Experience Throughout my twelve-week fellowship at Pratt & Whitney I had the opportunity to interact with numerous engineers and managers as well as to be exposed to a variety of disciplines and areas of engineering. My mentor, Bill Proscia, is an expert in the field of combustion instability analysis and modeling. I gained valuable experience working on a combustion project under his guidance. The project involved studying combustor aerodynamics and static stability of lean-premixed flames for two combustor geometries as a function of swirl number and fuel type. Having an almost non-existent background in the field of combustion, this was a challenging, but very rewarding project to work on. The first few weeks consisted of meeting with engineers and managers to decide on what kind of study I could conduct that would be useful to Pratt & Whitney. During this time I also was able to learn about the business side of engineering and gain a small insight into the overall infrastructure of Pratt & Whitney. In addition to these meetings much of my time was spent reading published literature as well as textbooks on combustion, methods used for modeling combustion, combustion stability, and other

Jared Crosby

2005-01-01T23:59:59.000Z

78

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

79

Chemical Kinetic Modeling of Advanced Transportation Fuels  

DOE Green Energy (OSTI)

Development of detailed chemical kinetic models for advanced petroleum-based and nonpetroleum based fuels is a difficult challenge because of the hundreds to thousands of different components in these fuels and because some of these fuels contain components that have not been considered in the past. It is important to develop detailed chemical kinetic models for these fuels since the models can be put into engine simulation codes used for optimizing engine design for maximum efficiency and minimal pollutant emissions. For example, these chemistry-enabled engine codes can be used to optimize combustion chamber shape and fuel injection timing. They also allow insight into how the composition of advanced petroleum-based and non-petroleum based fuels affect engine performance characteristics. Additionally, chemical kinetic models can be used separately to interpret important in-cylinder experimental data and gain insight into advanced engine combustion processes such as HCCI and lean burn engines. The objectives are: (1) Develop detailed chemical kinetic reaction models for components of advanced petroleum-based and non-petroleum based fuels. These fuels models include components from vegetable-oil-derived biodiesel, oil-sand derived fuel, alcohol fuels and other advanced bio-based and alternative fuels. (2) Develop detailed chemical kinetic reaction models for mixtures of non-petroleum and petroleum-based components to represent real fuels and lead to efficient reduced combustion models needed for engine modeling codes. (3) Characterize the role of fuel composition on efficiency and pollutant emissions from practical automotive engines.

PItz, W J; Westbrook, C K; Herbinet, O

2009-01-20T23:59:59.000Z

80

Leaning Juniper Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Leaning Juniper Wind Farm Leaning Juniper Wind Farm Facility Leaning Juniper Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner PacifiCorp Developer PPM Energy Inc Energy Purchaser PacifiCorp Location Gilliam County OR Coordinates 45.67598°, -120.242715° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.67598,"lon":-120.242715,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "advanced lean burn" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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81

Applying Bayesian Network Techniques to Prioritize Lean Six Sigma Efforts  

Science Conference Proceedings (OSTI)

In order to retain competitive advantages, many manufacturing organizations have applied Lean Six Sigma techniques to improve production processes. The general approach for implementing Lean Six Sigma is to perform various projects to tackle specific ... Keywords: Bayesian Network, Cause-and-Effect Relationships, Events of Interest, Lean, Probabilistic Inference, Six Sigma

Yanzhen Li, Rapinder S. Sawhne, Joseph H. Wilck

2013-04-01T23:59:59.000Z

82

Leaning Juniper 2A | Open Energy Information  

Open Energy Info (EERE)

Leaning Juniper 2A Leaning Juniper 2A Jump to: navigation, search Name Leaning Juniper 2A Facility Leaning Juniper 2A Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Iberdrola Renewables Developer Iberdrola Renewables Energy Purchaser Bonneville Power Admin Location 3 miles southwest of Arlington OR Coordinates 45.646628°, -120.24145° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.646628,"lon":-120.24145,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

83

Design and construction of a prototype advanced on-line fuel burn-up monitoring system for the modular pebble bed reactor  

Science Conference Proceedings (OSTI)

Modular Pebble Bed Reactor (MPBR) is a high temperature gas-cooled nuclear power reactor currently under study as a next generation reactor system. In addition to its inherently safe design, a unique feature of this reactor is its multi-pass fuel circulation in which the fuel pebbles are randomly loaded and continuously cycled through the core until they reach their prescribed End-of-Life burn-up limit. Unlike the situation with a conventional light water reactor, depending solely on computational methods to perform in-core fuel management for MPBR will be highly inaccurate. An on-line measurement system is needed to accurately assess whether a given pebble has reached its End-of-Life burn-up limit and thereby provide an on-line, automated go/no-go decision on fuel disposition on a pebble-by-pebble basis. This project investigated approaches to analyzing fuel pebbles in real time using gamma spectroscopy and possibly using passive neutron counting of spontaneous fission neutrons to provide the speed, accuracy, and burn-up range required for burnup determination of MPBR. It involved all phases necessary to develop and construct a burn-up monitor, including a review of the design requirements of the system, identification of detection methodologies, modeling and development of potential designs, and finally, the construction and testing of an operational detector system. Based upon the research work performed in this project, the following conclusions are made. In terms of using gamma spectrometry, two possible approaches were identified for burnup assay. The first approach is based on the measurement of the absolute activity of Cs-137. However, due to spectral interference and the need for absolute calibration of the spectrometer, the uncertainty in burnup determination using this approach was found to range from {approx} {+-}40% at beginning of life to {approx} {+-}10% at the discharge burnup. An alternative approach is to use a relative burnup indicator. In this case, a self-calibration method was developed to obtain the spectrometer's relative efficiency curve based upon gamma lines emitted from {sup 140}La. It was found that the ratio of {sup 239}Np/{sup 132}I can be used in burnup measurement with an uncertainty of {approx} {+-}3% throughout the pebble's lifetime. In addition, by doping the fuel with {sup 60}Co, the use of the {sup 60}Co/{sup 134}Cs and {sup 239}Np/{sup 132}I ratios can simultaneously yield the enrichment and burnup of each pebble. A functional gamma-ray spectrometry measurement system was constructed and tested with light water reactor fuels. Experimental results were observed to be consistent with the predictions. On using the passive neutron counting method for the on-line burnup measurement, it was found that neutron emission rate of an irradiated pebble is sensitive to its burnup history and the spectral-averaged cross sections used in the depletion calculations; thus a large uncertainty exists in the correlation between neutron emission and burnup. At low burnup levels, the uncertainty in the neutron emission/burnup correlation is too high and neutron emission rate is too low so that it is impossible to determine a pebble's burnup by on-line neutron counting. At high burnup levels, due to the decreasing of the uncertainty in neutron emission rate and the super-linear feature of the correlation, the uncertainty in burnup determination was found to be {approx}7% at the discharge burnup, which is acceptable for determining whether a pebble should be discharged or not. In terms of neutron detection, because an irradiated pebble is a weak neutron source and a much stronger gamma source, neutron detector system should have high neutron detection efficiency and strong gamma discrimination capability. Of all the commonly used neutron detectors, the He-3 and BF3 detector systems were found to be able to satisfy the requirement on detection efficiency; but their gamma discrimination capability is only marginal for this on-line application. Even with thick gamma shielding, these two types of detectors sha

Su, Bingjing; Hawari, Ayman, I.

2004-03-30T23:59:59.000Z

84

Spring Cleaning. Calorie Burning.  

E-Print Network (OSTI)

Spring Cleaning. Calorie Burning. Laundry: 73 Dusting: 85 Mopping the Floor: 153 Washing the Car Painting: 161 (Estimate based on 150 lb person per 30 minutes, more calories burned if weigh more, fewer calories burned if weigh less) Allergy Sufferers' Survival Guide > Wash your hair before bed to avoid

Acton, Scott

85

BNL | Biomass Burns  

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

Biomass Burn Observation Project (BBOP) Biomass Burn Observation Project (BBOP) Aerosols from biomass burning are recognized to perturb Earth's climate through the direct effect (both scattering and absorption of incoming shortwave radiation), the semi-direct effect (evaporation of cloud drops due to absorbing aerosols), and indirect effects (by influencing cloud formation and precipitation. Biomass burning is an important aerosol source, providing an estimated 40% of anthropogenically influenced fine carbonaceous particles (Bond, et al., 2004; Andrea and Rosenfeld, 2008). Primary organic aerosol (POA) from open biomass burns and biofuel comprises the largest component of primary organic aerosol mass emissions at northern temperate latitudes (de Gouw and Jimenez, 2009). Data from the IMPROVE

86

Ac#vi#es of the US Burning Plasma Organiza#on  

E-Print Network (OSTI)

=ons · USBPO ­ Coordinates US burning plasma research, to advance scien=fic understanding USBPO organizes the US Fusion Energy Science community to support burning plasma research 5 Charles Greenfield (Director) Amanda Hubbard (Deputy Director) Nermin

87

Leaning Juniper 2B | Open Energy Information  

Open Energy Info (EERE)

B B Jump to: navigation, search Name Leaning Juniper 2B Facility Leaning Juniper 2B Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Iberdrola Renewables Developer Iberdrola Renewables Energy Purchaser Bonneville Power Admin Location 3 miles southwest of Arlington OR Coordinates 45.646628°, -120.24145° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.646628,"lon":-120.24145,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

88

Effects of radiation and compression on propagating spherical flames of methane/air mixtures near the lean flammability limit  

SciTech Connect

Large discrepancies between the laminar flame speeds and Markstein lengths measured in experiments and those predicted by simulations for ultra-lean methane/air mixtures bring a great concern for kinetic mechanism validation. In order to quantitatively explain these discrepancies, a computational study is performed for propagating spherical flames of lean methane/air mixtures in different spherical chambers using different radiation models. The emphasis is focused on the effects of radiation and compression. It is found that the spherical flame propagation speed is greatly reduced by the coupling between thermal effect (change of flame temperature or unburned gas temperature) and flow effect (inward flow of burned gas) induced by radiation and/or compression. As a result, for methane/air mixtures near the lean flammability limit, the radiation and compression cause large amounts of under-prediction of the laminar flame speeds and Markstein lengths extracted from propagating spherical flames. Since radiation and compression both exist in the experiments on ultra-lean methane/air mixtures reported in the literature, the measured laminar flame speeds and Markstein lengths are much lower than results from simulation and thus cannot be used for kinetic mechanism validation. (author)

Chen, Zheng [State Key Laboratory for Turbulence and Complex Systems, Department of Mechanics and Aerospace Engineering, College of Engineering, Peking University, Beijing 100871 (China)

2010-12-15T23:59:59.000Z

89

Bittersweet and Burning Bush  

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

Bittersweet and Burning Bush Nature Bulletin No. 250 December 25, 1982 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation...

90

NOx Reduction with Natural Gas for Lean Large-Bore Engine Applications Using Lean NOx Trap Aftertreatment  

SciTech Connect

Large-bore natural gas engines are used for distributed energy and gas compression since natural gas fuel offers a convenient and reliable fuel source via the natural gas pipeline and distribution infrastructure. Lean engines enable better fuel efficiency and lower operating costs; however, NOx emissions from lean engines are difficult to control. Technologies that reduce NOx in lean exhaust are desired to enable broader use of efficient lean engines. Lean NOx trap catalysts have demonstrated greater than 90% NOx reduction in lean exhaust from engines operating with gasoline, diesel, and natural gas fuels. In addition to the clean nature of the technology, lean NOx traps reduce NOx with the fuel source of the engine thereby eliminating the requirement for storage and handling of secondary fuels or reducing agents. A study of lean NOx trap catalysts for lean natural gas engines is presented here. Testing was performed on a Cummins C8.3G (CG-280) engine on a motor dynamometer. Lean NOx trap catalysts were tested for NOx reduction performance under various engine operating conditions, and the utilization of natural gas as the reductant fuel source was characterized. Engine test results show that temperature greatly affects the catalytic processes involved, specifically methane oxidation and NOx storage on the lean NOx trap. Additional studies on a bench flow reactor demonstrate the effect of precious metal loading (a primary cost factor) on lean NOx trap performance at different temperatures. Results and issues related to the potential of the lean NOx trap technology for large-bore engine applications will be discussed.

Parks, JE

2005-02-11T23:59:59.000Z

91

The application of innovative lean in Toyota China.  

E-Print Network (OSTI)

?? The overall purpose of the thesis is to analyze the innovative way Toyota China Company has implemented lean principles. This thesis is an exploratory… (more)

WANG, YAN

2010-01-01T23:59:59.000Z

92

Catalysts for Lean Engine Emission Control - Emissions & Emission...  

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

controlling NOx emissions from lean engines is challenging. Traditionally, for the stoichiometric gasoline engine vehicles that dominate the U.S. passenger car market, a three-way...

93

PDF Modeling of Turbulent Lean Premixed Combustion  

Science Conference Proceedings (OSTI)

The joint velocity-scalar-frequency probability density function (PDF) methodology is employed for prediction of a bluff-body stabilized lean premixed methane-air flame. A reduced mechanism with CO and NO chemistry is used to describe fuel oxidation. The predicted mean and rms values of the velocity, temperature and concentrations of major and minor species are compared with laboratory measurements. This technical effort was performed in support of the National Energy Technology Laboratory’s on-going research in “Assessment of Turbo-Chemistry Models for Gas Turbine Combustion Emissions” under the RDS contract DE-AC26-04NT41817.

Yilmaz, S.L.; •Givi, P.; Strakey, P.A.

2007-10-01T23:59:59.000Z

94

Government Lean Enterprise Self-Assessment Tool (Government LESAT) 1.0  

E-Print Network (OSTI)

This Lean Aerospace Initiative (LAI) product utilizes elements of the Enterprise Transition To Lean (TTL) Roadmap and the Lean Enterprise Self-Assessment Tool (LESAT Version 1.0) to provide a structure and implementation ...

Lean Advancement Initiative

2005-05-15T23:59:59.000Z

95

Transitioning to a Lean Enterprise: A Guide for Leaders, Volume III, Roadmap Explorations  

E-Print Network (OSTI)

Volume III of this guide may be used as an in-depth reference source for acquiring deep knowledge about many of the aspects of transitioning to lean. Lean change agents and lean implementation leaders should find this ...

Bozdogan, Kirk

2000-01-01T23:59:59.000Z

96

Why Lean ?y ( QC TQC 5-7 KPI Competency HA-SHA KM  

E-Print Network (OSTI)

) #12;Doing More With Less Lean Lean (Toyota Production System-TPS ) ( ) ( ) #12;TOYOTA PRODUCTION SYSTEMTOYOTA PRODUCTION SYSTEM ( TPS ) 1930( TPS ) 1930s Lean Management (1990 : (Standard Work- CPG) 2. / Toyota y / waste value 3. (time, human effort, materials

Laksanacharoen, Sathaporn

97

Exhaust particle characterization for lean and stoichiometric DI vehicles operating on ethanol-gasoline blends  

DOE Green Energy (OSTI)

Gasoline direct injection (GDI) engines can offer better fuel economy and higher performance over their port fuel-injected (PFI) counterparts, and are now appearing in increasingly more U.S. and European vehicles. Small displacement, turbocharged GDI engines are replacing large displacement engines, particularly in light-duty trucks and sport utility vehicles, in order for manufacturers to meet the U.S. fuel economy standards for 2016. Furthermore, lean-burn GDI engines can offer even higher fuel economy than stoichiometric GDI engines and have overcome challenges associated with cost-effective aftertreatment for NOx control. Along with changes in gasoline engine technology, fuel composition may increase in ethanol content beyond the current 10% due to the recent EPA waiver allowing 15% ethanol. In addition, the Renewable Fuels Standard passed as part of the 2007 Energy Independence and Security Act (EISA) mandates the use of biofuels in upcoming years. GDI engines are of environmental concern due to their high particulate matter (PM) emissions relative to port-fuel injected (PFI) gasoline vehicles; widespread market penetration of GDI vehicles may result in additional PM from mobile sources at a time when the diesel contribution is declining. In this study, we characterized particulate emissions from a European certified lean-burn GDI vehicle operating on ethanol-gasoline blends. Particle mass and particle number concentration emissions were measured for the Federal Test Procedure urban driving cycle (FTP 75) and the more aggressive US06 driving cycle. Particle number-size distributions and organic to elemental carbon ratios (OC/EC) were measured for 30 MPH and 80 MPH steady-state operation. In addition, particle number concentration was measured during wide open throttle accelerations (WOTs) and gradual accelerations representative of the FTP 75. Fuels included certification gasoline and 10% (E10) and 20% (E20) ethanol blends from the same supplier. The particle mass emissions were approximately 3 and 7 mg/mile for the FTP75 and US06, respectively, with lower emissions for the ethanol blends. The data are compared to a previous study on a U.S.-legal stoichiometric GDI vehicle operating on the same ethanol blends. The lean-burn GDI vehicle emitted a higher number of particles, but had an overall smaller average size. Particle number per mile decreased with increasing ethanol content for the transient tests. For the 30 and 80 mph tests, particle number concentration decreased with increasing ethanol content, although the shape of the particle size distribution remained the same. Engine-out OC/EC ratios were highest for the stoichiometric GDI vehicle with E20, but tailpipe OC/EC ratios were similar for all vehicles.

Storey, John Morse [ORNL; Barone, Teresa L [ORNL; Thomas, John F [ORNL; Huff, Shean P [ORNL

2012-01-01T23:59:59.000Z

98

Evaluation of NASA Lean Premixed Hydrogen Burner  

DOE Green Energy (OSTI)

The stability characteristics of a prototype premixed, hydrogen-fueled burner were studied. The potential application is the use of hydrogen as a fuel for aircraft gas turbine operation. The burner configuration consisted of nine 6.72 mm (0.265 in) diameter channels through which the reactants entered the burner. Hydrogen was injected radially inward through two 0.906-mm (0.0357 in) diameter holes located on opposite sides of each air channel. In this way the region over which hydrogen and air were premixed was minimized to prevent potential flashback problems. All tests were carried out at atmospheric pressure. Flame stability was studied over a range of fuel-lean operating conditions since lean combustion is currently recognized as an effective approach to NOx emissions reduction. In addition to pure hydrogen and air, mixtures of hydrogen-blended methane and air were studied to evaluate the potential improvements in flame stability as hydrogen replaces methane as the primary fuel component.

Robert W. Schefer

2003-01-01T23:59:59.000Z

99

The role of lean manufacturing principles and strategic alternatives in achieving business goals  

E-Print Network (OSTI)

Lean Manufacturing is widely accepted as a proven method to achieve operational excellence. Many manufacturers undertake lean manufacturing implementations as a strategy to improve competitiveness and realize business ...

Ramaswamy, Dhananjay

2006-01-01T23:59:59.000Z

100

Sun tanning/burning  

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

Sun tanning/burning Sun tanning/burning Name: Richardo Cossyleon Location: N/A Country: N/A Date: N/A Question: Why doesn't the sun affect or burn people with dark pigment in their skin? Replies: Good question! The pigment, melanin, is more toward the surface of the upper skin layer and absorbs ultraviolet rays from the Sun or artificial sources. This absorption protects the lower layers from damage and inflammation (burning). A very dark skinned person may have over a 1000X the protection from UV compared to a fair skinned person. Fair skinned people should use sun-block lotions especially early in the warm season AND keep exposure to the sun, particularly at midday, to less than 30 min. Even if a person gets a good tan, the sun's UV will age the skin over time. It will get wrinkled and develop age lines, etc. after many years of exposure. Moderation is the key!

Note: This page contains sample records for the topic "advanced lean burn" 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

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

102

Development of Burning Plasma and Advanced Scenarios  

E-Print Network (OSTI)

S A N D I E G O DIII­D 248-04/TCL//rs by T.C. Luce for the DIII­D Team Presented at 20th IAEA Fusion-04/TCL/rsNATIONAL FUSION FACILITY S A N D I E G O DIII­D Strengthening the scientific basis for next themes: #12;DIII­D EXPERIMENTS INCREASE CONFIDENCE IN REACHING THE ITER PERFORMANCE TARGETS 248-04/TCL

103

Preface: Special Issue on Catalytic Control of Lean-Burn Engine Exhaust Emissions  

Science Conference Proceedings (OSTI)

This issue of Catalysis Today includes original research articles based on select presentations from the Mobile Emissions Control Symposium at the 22nd North American Catalysis Society (NACS) Meeting held in Detroit in June 2011, with a particular focus on catalyzed diesel emissions control. The Symposium was dedicated to the memory of Dr. Haren Gandhi, a visionary technology leader and a passionate environmental advocate.

Yezerets, Aleksey; Peden, Charles HF; Szanyi, Janos; Nova, Isabella; Epling, Bill

2012-04-30T23:59:59.000Z

104

Apparatus and method for burning a lean, premixed fuel/air ...  

Electricity Transmission; Energy Analysis; Energy Storage; Geothermal; Hydrogen and Fuel Cell; Hydropower, Wave and Tidal; Industrial Technologies; ...

105

Open Burning Permit Events Management  

E-Print Network (OSTI)

Open Burning Permit Events Management Form Revision Date: 09/29/2010 OpenBurningPermit.docx A Use being burned: (check all that apply) [ ] Small logs (less than 16 in. long) [ ] Finished Lumber________________________________ As the individual responsible for this event, I have read the attached Regulations for Open Burning. The sponsoring

Manning, Sturt

106

Heavy-Duty Emissions Control: Plasma-Facilitated vs Reformer-Assisted Lean NOx Catalysis  

DOE Green Energy (OSTI)

Progress has been made in the control of combustion processes to limit the formation of environmentally harmful species, but lean burn vehicles, such as those powered by diesel engines used for the majority of commercial trucking and off-road applications, remain a major source of nitrogen oxides (NOx) and particulate matter (PM) emissions. Tighter control of the combustion process coupled with exhaust gas recirculation has brought emissions in line with 2004 targets worldwide. Additional modifications to the engine control system, somewhat limited NOx control, and PM filters will likely allow the 2007 limits to be met for the on-highway regulations for heavy-duty engines in the United States. Concern arises when the NOx emission limit of 0.2 g/bhphr set for the year 2010 is considered.

(1)Aardahl, C; (1)Rozmiarek, R; (1)Rappe, K; (1)Mendoza, D (2)Park, P

2003-08-24T23:59:59.000Z

107

High-bandwidth Modulation of H2/Syngas Fuel to Control Combustion Dynamics in Micro-Mixing Lean Premix Systems  

SciTech Connect

The goal of this program was to develop and demonstrate fuel injection technologies that will facilitate the development of cost-effective turbine engines for Integrated Gasification Combined Cycle (IGCC) power plants, while improving efficiency and reducing emissions. The program involved developing a next-generation multi-point injector with enhanced stability performance for lean premix turbine systems that burn hydrogen (H2) or synthesis gas (syngas) fuels. A previously developed injector that demonstrated superior emissions performance was improved to enhance static flame stability through zone staging and pilot sheltering. In addition, piezo valve technology was implemented to investigate the potential for enhanced dynamic stability through high-bandwidth modulation of the fuel supply. Prototype injector and valve hardware were tested in an atmospheric combustion facility. The program was successful in meeting its objectives. Specifically, the following was accomplished: Demonstrated improvement of lean operability of the Parker multi-point injector through staging of fuel flow and primary zone sheltering; Developed a piezo valve capable of proportional and high-bandwidth modulation of gaseous fuel flow at frequencies as high as 500 Hz; The valve was shown to be capable of effecting changes to flame dynamics, heat release, and acoustic signature of an atmospheric combustor. The latter achievement indicates the viability of the Parker piezo valve technology for use in future adaptively controlled systems for the mitigation of combustion instabilities, particularly for attenuating combustion dynamics under ultra-lean conditions.

Jeff Melzak; Tim Lieuwen; Adel Mansour

2012-01-31T23:59:59.000Z

108

Investigation of Aging Mechanisms in Lean NOx Traps  

Science Conference Proceedings (OSTI)

Lean NO{sub x} traps (LNTs) represent a promising technology for the abatement of NO{sub x} under lean conditions. Although LNTs are starting to find commercial application, the issue of catalyst durability remains problematic. LNT susceptibility to sulfur poisoning is the single most important factor determining effective catalyst lifetime. The NO{sub x} storage element of the catalyst has a greater affinity for SO{sub 3} than it does for NO{sub 2}, and the resulting sulfate is more stable than the stored nitrate. Although this sulfate can be removed from the catalyst by means of high temperature treatment under rich conditions, the required conditions give rise to deactivation mechanisms such as precious metal sintering, total surface area loss, and solid state reactions between the various oxides present. The principle objective of this project was to improve understanding of the mechanisms of lean NO{sub x} trap aging, and to understand the effect of washcoat composition on catalyst aging characteristics. The approach utilized involved detailed characterization of model catalysts prior to and after aging, in tandem with measurement of catalyst performance in NO{sub x} storage and reduction. In this manner, NO{sub x} storage and reduction characteristics were correlated with the evolution of catalyst physico-chemical properties upon aging. Rather than using poorly characterized proprietary catalysts, or simple model catalysts of the Pt/BaO/Al{sub 2}O{sub 3} type (representing the first generation of LNTs), Pt/Rh/BaO/Al{sub 2}O{sub 3} catalysts were employed which also incorporated CeO{sub 2} or CeO{sub 2}-ZrO{sub 2}, representing a model system which more accurately reflects current LNT formulations. Catalysts were prepared in which the concentration of each of the main components was systematically varied: Pt (50, 75 or 100 g/ft{sup 3}), Rh (10 or 20 g/ft{sup 3}), BaO (15, 30 or 45 g/L), and either CeO{sub 2} (0, 50 or 100 g/L) or CeO{sub 2}-ZrO{sub 2} (0, 50 or 100 g/L). A high surface area La-stabilized alumina was used to support the BaO phase. Catalysts were obtained by washcoating onto standard cordierite substrates, the total washcoat loading being set at 260 g/L. La-stabilized alumina was used as the balance. Subsequent to de-greening, the NO{sub x} storage and reduction characteristics of the catalysts were evaluated on a bench reactor, after which the catalysts were aged on a bench reactor to the equivalent of ca. 75,000 miles of road aging using a published accelerated aging protocol. The aged catalysts were then subjected to the same evaluation proecdure used for the de-greened catalysts. In addition to the use of standard physico-chemical analytical techniques for studying the fresh and aged model catalysts, use was made of advanced analytical tools for characterizing their NO{sub x} storage/reduction and sulfation/desulfation characteristics, such as Spatially resolved capillary-inlet Mass Spectrometry (SpaciMS) and in situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS).

Mark Crocker

2010-03-31T23:59:59.000Z

109

Journal of Fusion Energy, Vol. 20, No. 3, September 2001 ( 2002) Report of the FESAC Panel on a Burning Plasma Program  

E-Print Network (OSTI)

on a Burning Plasma Program Strategy to Advance Fusion Energy Stewart Prager (Chair),1 Charles Baker,2 David a strategy for the study of burning fusion plasmas. Experimental study of a burning plasma has long been plasma state in the laboratory, uncover the new physics associated with the fusion burn, and develop

Najmabadi, Farrokh

110

Catalysts for Lean Engine Emission Control - Emissions & Emission Controls  

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

Catalysts for Lean Engine Emission Control Catalysts for Lean Engine Emission Control Catalysts for controlling NOx from lean engines are studied in great detail at FEERC. Lean NOx Traps (LNTs) and Selective Catalytic Reduction (SCR) are two catalyst technologies of interest. Catalysts are studied from the nanoscale to full scale. On the nanoscale, catalyst powders are analyzed with chemisorptions techniques to determine the active metal surface area where catalysis occurs. Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectroscopy is used to observe the chemical reactions occurring on the catalyst surface during catalyst operation. Both powder and coated catalyst samples are analyzed on bench flow reactors in controlled simulated exhaust environments to better characterize the chemical

111

McLean Electric Coop, Inc | Open Energy Information  

Open Energy Info (EERE)

McLean Electric Coop, Inc McLean Electric Coop, Inc Jump to: navigation, search Name McLean Electric Coop, Inc Place North Dakota Utility Id 12090 Utility Location Yes Ownership C NERC Location MRO NERC MRO Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Electric Heat Rate(Submeter-October to April) Off Peak Grain Drying Commercial Residential Rate Residential Three Phase Accounts Industrial Three Phase Irrigation Average Rates Residential: $0.0955/kWh Commercial: $0.0945/kWh Industrial: $0.0518/kWh The following table contains monthly sales and revenue data for McLean

112

Stability and Mixing Characterization of Industrial Lean Premixed Nozzles  

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

and Mixing Characterization of and Mixing Characterization of Industrial Lean Premixed Nozzles * Unique research capabilities have been developed for the study of fuel mixing and combustion instabilities in lean premixed combustors. * These capabilities have been used to characterize the performance of industrial lean premixed nozzles for Solar Turbines, United Technologies and General Electric. * This information has been used by the gas turbine manufacturers to gain understanding and new insights for the development of stable low emissions lean premixed combustors. Cooling ring Solar Turbines Centaur 50 Nozzle Stainless steel exhaust Fused silica combustor Photo of Stable Flame Photo of Unstable Flame InAs Detector HeNe Laser (3.39 μm) InAs Detector Centaur 50 Nozzle Measurement of equivalence ratio

113

Summary Report: Systematic IPT Integration in Lean Development Programs  

E-Print Network (OSTI)

This document provides a summary report of the M.I.T. Masters Thesis, "Systematic IPT Integration in Lean Development Programs" by Tyson R. Browning. These studies argue for the inclusion of program integration principles ...

Browning, Tyson R.

114

Lean engineering for planning systems redesign: staff participation by simulation  

Science Conference Proceedings (OSTI)

Lean manufacturing aims at flexible and efficient manufacturing systems by reducing waste in all forms, such as, production of defective parts, excess inventory, unnecessary processing steps, and unnecessary movements of people or materials. Recent research ...

Durk-Jouke van der Zee; Arnout Pool; Jakob Wijngaard

2008-12-01T23:59:59.000Z

115

The Guide to Lean Enablers for Managing Engineering Programs  

E-Print Network (OSTI)

This document provides the findings of the Joint MIT?PMI?INCOSE Lean in Program Management Community of Practice that are based on a 1?year project executed during 2011 and 2012. The community was made up of selected subject ...

Oehmen, Josef

116

Lean product development for the automotive niche vehicle marketplace  

E-Print Network (OSTI)

The automotive low volume niche vehicle marketplace is growing, evidenced by increasing media coverage and fierce competition between original equipment manufacturers. Development of niche vehicles must be lean and therefore ...

Kupczewski, Celeste D., 1974-

2005-01-01T23:59:59.000Z

117

Business expansion and lean transformation for helicopter blade shop  

E-Print Network (OSTI)

Sikorsky Aircraft is undergoing a lean transformation as its helicopter blade line is relocated from Stratford to Site B. Value Stream Mapping is a vital tool to eliminate sources of waste in the existing blade shop and ...

Bar, S. Neil (Saumen Neil)

2006-01-01T23:59:59.000Z

118

Framework for Understanding the Relationship between Lean and Safety in Construction  

E-Print Network (OSTI)

Lean construction borrows concepts from lean manufacturing and Toyota Production System in order to eliminate waste and add value to the construction process. Manufacturing processes utilizing lean principles have matured and developed a clear understanding of the relation between lean and safety. Because lean in construction is a relatively new phenomenon, there is not a completely developed understanding of how lean practices affect safety in construction. The Lean Construction Institute and the Academic Forum for Lean Construction has recently targeted this area for focused research. Since all safety incidents imply waste in time and resources, lean and safety have a common ground in the minimization of waste. This thesis researches the common ground of lean and safety in waste minimization and proposes a framework for understanding their relationship. This thesis also critically analyzes lean and safety principles to form an insight to the relationship between lean theories as well as practices and safety issues reported in construction literature. Further, literature also revealed the safety strategies and checklists that companies typically incorporate in their program. A comparative analysis of lean and safety is employed to understand their relations in a better way. This framework establishes that lean and safety have a strong relationship in the context of construction. Future work is needed to show that lean practices indeed strongly affect safety by reducing the number of incidents.

Prakash, Ramya

2010-05-01T23:59:59.000Z

119

NETL F 451.1/1-1, Categorical Exclusion Designation Form  

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

Multiple sites (3), Multiple states Advancing Low Temperature Combustion and Lean Burning Engines for Light-and Heavy-Duty Vehicles... Project will advance low-temperature...

120

5, 27912831, 2005 Biomass burning  

E-Print Network (OSTI)

ACPD 5, 2791­2831, 2005 Biomass burning emissions P. Guyon et al. Title Page Abstract Introduction measurements of trace gas and aerosol particle emissions from biomass burning in Amazonia P. Guyon1 , G. Frank1. 2791 #12;ACPD 5, 2791­2831, 2005 Biomass burning emissions P. Guyon et al. Title Page Abstract

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "advanced lean burn" 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

Smoke Management for Prescribed Burning  

E-Print Network (OSTI)

Smoke Management for Prescribed Burning E-1008 Oklahoma Cooperative Extension Service Division of Agricultural Sciences and Natural Resources Oklahoma State University Smoke Management for Prescribed Burning Extension #12;#12;Smoke Management for Prescribed Burning John R. Weir Research Associate Natural Resource

Balasundaram, Balabhaskar "Baski"

122

Burning Plasma Developments Presented to  

E-Print Network (OSTI)

Burning Plasma Developments Dale Meade Presented to VLT Program Advisory Committee UCLA December 4 and Burning Plasma Issues · NSO PAC Activities First Meeting July 20-21, 2001 at GA Action Items and Status Second Meeting January 17-18, 2001 at MIT Agenda items · FuSAC Recommendation on a burning plasma

123

7, 1733917366, 2007 Biomass burning  

E-Print Network (OSTI)

ACPD 7, 17339­17366, 2007 Biomass burning plumes during the AMMA wet season experiment C. H. Mari a Creative Commons License. Atmospheric Chemistry and Physics Discussions Tracing biomass burning plumes from. Mari (marc@aero.obs-mip.fr) 17339 #12;ACPD 7, 17339­17366, 2007 Biomass burning plumes during the AMMA

Paris-Sud XI, Université de

124

D. Moreau IEA W60 Burning Plasma Physics and Simulation, Tarragona, July 2005 INTEGRATED REAL-TIME CONTROL  

E-Print Network (OSTI)

D. Moreau IEA W60 Burning Plasma Physics and Simulation, Tarragona, July 2005 INTEGRATED REAL-TIME CONTROL FOR ADVANCED STEADY STATE SCENARIOS AND APPLICATIONS TO BURNING PLASMAS EFDA-JET CSU, Culham. Sartori, and many other JET-EFDA Contributors D. Moreau #12;D. Moreau IEA W60 Burning Plasma Physics

125

Measuring the leanness of manufacturing systems-A case study of Ford Motor Company and General Motors  

Science Conference Proceedings (OSTI)

In spite of the vast research published on lean manufacturing systems in several disciplines in the last decade, the concept remains underdeveloped for two reasons. First, it lacks a generally accepted definition. Different authors define lean in terms ... Keywords: Benchmarking, Fuzzy-logic leanness, L62, Lean, Leanness, M41, Systematic measures

M. E. Bayou; A. de Korvin

2008-12-01T23:59:59.000Z

126

Lean combustion in automotive engines: as assessment of the addition of hydrogen to gasoline as compared to other techniques  

SciTech Connect

An examination was made of the feasibility, practicability, performance, fuel economy, and emissions of the concept of the addition of hydrogen to gasoline for use as an automobile fuel. The specific hydrogen addition concepts evaluated included onboard storage of hydrogen as a bottled gas, as a cryogenic liquid, and as a regenerable gas in a metal hydride storage system, and the onboard generation of hydrogen by the reformation of gasoline in a fuel reformer (or gas generator). Both partial oxidation and steam reforming fuel reformers were considered. For perspective, comparisons were made of the hydrogen addition concept with the conventional spark ignition engine baseline and other lean engine concepts, e.g., advanced lean carbureted engines and stratified charge engines. Hydrogen addition via fuel reformation was found to be a feasible method of achieving ultralean engine operation.

1976-02-01T23:59:59.000Z

127

Be a Lean, Mean, Green Eating Machine | Department of Energy  

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

Be a Lean, Mean, Green Eating Machine Be a Lean, Mean, Green Eating Machine Be a Lean, Mean, Green Eating Machine January 31, 2012 - 2:53pm Addthis Kristin Swineford Communication Specialist, Weatherization and Intergovernmental Programs Like most Americans, I watched the State of the Union to hear President Obama outline his goals for the year ahead, to understand his energy outlook and plans, and of course, to see what Michelle would be wearing (a stunning royal blue, of course). When listening to the President highlight his administration's clean energy initiatives, I couldn't help but remember the First Family's goals to reduce childhood obesity in America. By no surprise, the link between nationwide health improvement and energy efficiency efforts is strong. By reducing our demand for processed and imported foods, we can improve the

128

Be a Lean, Mean, Green Eating Machine | Department of Energy  

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

Be a Lean, Mean, Green Eating Machine Be a Lean, Mean, Green Eating Machine Be a Lean, Mean, Green Eating Machine January 31, 2012 - 2:53pm Addthis Kristin Swineford Communication Specialist, Weatherization and Intergovernmental Programs Like most Americans, I watched the State of the Union to hear President Obama outline his goals for the year ahead, to understand his energy outlook and plans, and of course, to see what Michelle would be wearing (a stunning royal blue, of course). When listening to the President highlight his administration's clean energy initiatives, I couldn't help but remember the First Family's goals to reduce childhood obesity in America. By no surprise, the link between nationwide health improvement and energy efficiency efforts is strong. By reducing our demand for processed and imported foods, we can improve the

129

Microsoft Word - Draft Leaning Juniper II Tiered ROD _2_.doc  

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

Leaning Juniper II Wind Project Leaning Juniper II Wind Project March 2009 B o n n e v i l l e P o w e r A d m i n i s t r a t i o n 1 INTRODUCTION The Bonneville Power Administration (BPA) has decided to offer contract terms for interconnection of up to 200 megawatts (MW) of power to be generated by the proposed Leaning Juniper II Wind Project (Wind Project) into the Federal Columbia River Transmission System (FCRTS). Iberdrola Renewables, Inc. (Iberdrola) proposes to construct and operate the proposed Wind Project in Gilliam County, Oregon, and has requested interconnection to the FCRTS at BPA's Jones Canyon Substation in Gilliam County, Oregon. BPA will expand this existing substation and install new equipment at the substation to accommodate this additional power into the FCRTS. BPA's decision to offer terms to interconnect the Wind Project is consistent with BPA's

130

Study of Lean NOx Technology for Diesel Emission Control  

DOE Green Energy (OSTI)

Diesel engines because of their reliability and efficiency are a popular mobile source. The diesel engine operates at higher compression ratios and with leaner fuel mixtures and produces lower carbon monoxide and hydrocarbon emissions. The oxygen-rich environment leads to higher nitrogen oxides in the form of NO. Catalysts selectively promoting the reduction of NOx by HCs in a lean environment have been termed lean NOx catalyst ''LNC''. The two groups that have shown most promise are, Copper exchanged zeolite Cu/ZSM5, and Platinum on alumina Pt/Al2O3.

Mital, R.

2000-08-20T23:59:59.000Z

131

Transitioning to a Lean Enterprise: A Guide for Leaders, Volume I, Executive Overview  

E-Print Network (OSTI)

This Transition-To-Lean Guide is intended to help your enterprise leadership navigate your enterprise’s challenging journey into the promising world of “lean.” You have opened this guide because, in some fashion, you have ...

Mize, Joe

2000-01-01T23:59:59.000Z

132

Lean principles in IT services: a case study on implementation and best practices  

Science Conference Proceedings (OSTI)

Lean methodologies are adopted into the information technology (IT) industry to eliminate waste and maximise business value to the customers. The global services models today provide ample scope to apply lean practices to IT services delivery ...

Suresh Malladi; P. D. D. Dominic; Ahmed Kamil

2011-09-01T23:59:59.000Z

133

16.852J / ESD.61J Integrating The Lean Enterprise, Fall 2002  

E-Print Network (OSTI)

Addresses some of the important issues involved with the planning, development, and implementation of lean enterprises. People, technology, process, and management dimensions of an effective lean manufacturing company are ...

Nightingale, Deborah J.

134

Lean Enterprise Self Assessment Tool Version 1.0, Facilitator's Guide  

E-Print Network (OSTI)

This manual is intended for product development (PD) personnel working on improving their own processes, and the lean change agents working with them. Its aim is to provide practical guidance for applying lean concepts to ...

Lean Advancement Initiative

135

A lean enterprise approach for developing high speed rail in Japan and Portugal  

E-Print Network (OSTI)

This thesis explores and evaluates the application of the lean enterprise concept to the expansion and development of the high speed railway industry in Japan. The basic idea of the lean enterprise is increasing value-added ...

Iwamura, Nobuhiro

2007-01-01T23:59:59.000Z

136

The Soret Effect in Naturally Propagating, Premixed, Lean, Hydrogen-Air Flames  

E-Print Network (OSTI)

3] R. W. Shefer, Int. J. Hydrogen Energ. 28 (2003) 1131–Propagating, Premixed, Lean, Hydrogen-Air Flames Joseph F.diffusion effects in lean hydrogen-air ?ames, in spite of

Grcar, Joseph F

2008-01-01T23:59:59.000Z

137

Mechanistic aspects of lean NO2 reduction by propane over HZSM-5  

Science Conference Proceedings (OSTI)

This study focuses on the mechanism of lean NO2 reduction by propane. In particular the role of ... KEY WORDS: FTIR; lean NO2 reduction; propane; HZSM- 5. 1.

138

Combustion lean limits fundamentals and their application to a SI hydrogen-enhanced engine concept  

E-Print Network (OSTI)

Operating an engine with excess air, under lean conditions, has significant benefits in terms of increased engine efficiency and reduced emissions. However, under high dilution levels, a lean limit is reached where combustion ...

Ayala, Ferran A. (Ferran Alberto), 1976-

2006-01-01T23:59:59.000Z

139

Approaches To Crisis Prevention In Lean Product Development By High Performance Teams And Through Risk Management  

E-Print Network (OSTI)

This thesis investigates crisis prevention in lean product development, focusing on high performance teams and risk management methods.

Oehmen, Josef

140

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

Note: This page contains sample records for the topic "advanced lean burn" 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

Thyroid hormones in genetically lean or fat chickens : effects of age and triiodothyronine supplementation  

E-Print Network (OSTI)

Thyroid hormones in genetically lean or fat chickens : effects of age and triiodothyronine that our chicken lines selected for leanness or fatness showed significant differences in thyroid hormones Monnaie, France. Summary. Thyroid hormones were measured in plasma of genetically lean (LL) or fat (FL

Recanati, Catherine

142

FUEL LEAN BIOMASS REBURNING IN COAL-FIRED BOILERS  

DOE Green Energy (OSTI)

This final technical report describes research conducted between July 1, 2000, and June 30, 2002, for the project entitled ''Fuel Lean Biomass Reburning in Coal-Fired Boilers,'' DOE Award No. DE-FG26-00NT40811. Fuel Lean Biomass Reburning is a method of staging fuel within a coal-fired utility boiler to convert nitrogen oxides (NOx) to nitrogen by creating locally fuel-rich eddies, which favor the reduction of NOx, within an overall fuel lean boiler. These eddies are created by injecting a supplemental fuel source, designated as the reburn fuel, downstream of the primary combustion zone. Chopped biomass was the reburn fuel for this project. Four parameters were explored in this research: the initial oxygen concentration ranged between 1%-6%, the amount of biomass used as the reburn fuel ranged between from 0%-23% of the total % energy input, the types of biomass used were low nitrogen switchgrass and high nitrogen alfalfa, and the types of carrier gases used to inject the biomass (nitrogen and steam). Temperature profiles and final flue gas species concentrations are presented in this report. An economic evaluation of a potential full-scale installation of a Fuel-Lean Biomass Reburn system using biomass-water slurry was also performed.

Jeffrey J. Sweterlitsch; Robert C. Brown

2002-07-01T23:59:59.000Z

143

FUEL LEAN BIOMASS REBURNING IN COAL-FIRED BOILERS  

SciTech Connect

This final technical report describes research conducted between July 1, 2000, and June 30, 2002, for the project entitled ''Fuel Lean Biomass Reburning in Coal-Fired Boilers,'' DOE Award No. DE-FG26-00NT40811. Fuel Lean Biomass Reburning is a method of staging fuel within a coal-fired utility boiler to convert nitrogen oxides (NOx) to nitrogen by creating locally fuel-rich eddies, which favor the reduction of NOx, within an overall fuel lean boiler. These eddies are created by injecting a supplemental fuel source, designated as the reburn fuel, downstream of the primary combustion zone. Chopped biomass was the reburn fuel for this project. Four parameters were explored in this research: the initial oxygen concentration ranged between 1%-6%, the amount of biomass used as the reburn fuel ranged between from 0%-23% of the total % energy input, the types of biomass used were low nitrogen switchgrass and high nitrogen alfalfa, and the types of carrier gases used to inject the biomass (nitrogen and steam). Temperature profiles and final flue gas species concentrations are presented in this report. An economic evaluation of a potential full-scale installation of a Fuel-Lean Biomass Reburn system using biomass-water slurry was also performed.

Jeffrey J. Sweterlitsch; Robert C. Brown

2002-07-01T23:59:59.000Z

144

Bending Burning Matches and Crumpling Burning Paper Texas A&M University  

E-Print Network (OSTI)

Bending Burning Matches and Crumpling Burning Paper Zeki Melek Texas A&M University Department burning. Specifically, we can simulate the bending of burning matches, and the folding of burning paper interactively. 1 Introduction We present a simple method to increase the realism of the simu- lation of burning

Keyser, John

145

BLM Burns District Office | Open Energy Information  

Open Energy Info (EERE)

Burns District Office Jump to: navigation, search Name BLM Burns District Office Place Hines, Oregon References BLM Burns District Office1 This article is a stub. You can help...

146

INHIBITION EFFECTS ON EXTINCTION OF POLYMER BURNING  

E-Print Network (OSTI)

ON EXTINCTION OF POLYMER BURNING* W.J. Pitz R.F. SawyerQuantitative determinations of burning rates, extinctionlayer at the surface of a burning polymer. The char l ayer

Pitz, W.J.

2011-01-01T23:59:59.000Z

147

Fuel Effects on a Low-Swirl Injector for Lean Premixed Gas Turbines  

Science Conference Proceedings (OSTI)

Laboratory experiments have been conducted to investigate the fuel effects on the turbulent premixed flames produced by a gas turbine low-swirl injector (LSI). The lean-blow off limits and flame emissions for seven diluted and undiluted hydrocarbon and hydrogen fuels show that the LSI is capable of supporting stable flames that emit < 5 ppm NO{sub x} ({at} 15% O{sub 2}). Analysis of the velocity statistics shows that the non-reacting and reacting flowfields of the LSI exhibit similarity features. The turbulent flame speeds, S{sub T}, for the hydrocarbon fuels are consistent with those of methane/air flames and correlate linearly with turbulence intensity. The similarity feature and linear S{sub T} correlation provide further support of an analytical model that explains why the LSI flame position does not change with flow velocity. The results also show that the LSI does not need to undergo significant alteration to operate with the hydrocarbon fuels but needs further studies for adaptation to burn diluted H{sub 2} fuels.

Littlejohn, David; Littlejohn, David; Cheng, R.K.

2007-12-03T23:59:59.000Z

148

Energy Department Announces $2.5 Million to Advance Technologies ...  

Energy Department Announces $2.5 Million to Advance Technologies for Clean-Burning, Efficient Biomass Cookstoves. April 13, 2012. The Energy Department today ...

149

Energy Department Announces $2.5 Million to Advance ...  

Energy Department Announces $2.5 Million to Advance Technologies for Clean-Burning, Efficient Biomass Cookstoves. April 13, 2012. WASHINGTON, DC – The Energy ...

150

McLean, Virginia: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

McLean, Virginia: Energy Resources McLean, Virginia: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 38.9342776°, -77.1774801° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.9342776,"lon":-77.1774801,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

151

Synergies of PCCI-Type Combustion and Lean NOx Trap Catalysis for Diesel Engines  

Science Conference Proceedings (OSTI)

It is widely recognized that future NOx and PM emission targets for diesel engines cannot be met solely via advanced combustion over the full engine drive cycle. Therefore some combination of advanced combustion methodology with an aftertreatment technology will be required. In this study, NOx reduction, fuel efficiency, and regeneration performance of lean NOx trap (LNT) were evaluated for four operating conditions. The combustion approaches included baseline engine operation with and without EGR, two exhaust enrichment methods (post injection and delayed injection), and one advanced combustion mode to enable high efficiency clean combustion (HECC). A 1.7 liter 4-cylinder diesel engine was operated under five conditions, which represent key interest points for light-duty diesel operation. At the low load setting the exhaust temperature was too low to enable LNT regeneration and oxidation; however, HECC (low NOx) was achievable. HECC was also reached under more moderate loads and the exhaust temperatures were high enough to enable even further NOx reductions by the LNT. At high loads HECC becomes difficult but the LNT performance improves and acceptable regeneration can be met with enrichment methodologies.

Parks, II, James E [ORNL; Prikhodko, Vitaly Y [ORNL; Kass, Michael D [ORNL; Huff, Shean P [ORNL

2008-01-01T23:59:59.000Z

152

Burning Plasma Support Research Program  

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

Burning Plasma Support Research Program on Alcator C-Mod Presented by: Stephen M. Wolfe Alcator C-Mod Five Year Proposal Review MIT Plasma Science & Fusion Center Cambridge, MA May...

153

Category:Burns, OR | Open Energy Information  

Open Energy Info (EERE)

Burns, OR Burns, OR Jump to: navigation, search Go Back to PV Economics By Location Media in category "Burns, OR" The following 16 files are in this category, out of 16 total. SVFullServiceRestaurant Burns OR PacifiCorp (Oregon).png SVFullServiceRestauran... 71 KB SVHospital Burns OR PacifiCorp (Oregon).png SVHospital Burns OR Pa... 74 KB SVLargeHotel Burns OR PacifiCorp (Oregon).png SVLargeHotel Burns OR ... 74 KB SVLargeOffice Burns OR PacifiCorp (Oregon).png SVLargeOffice Burns OR... 69 KB SVMediumOffice Burns OR PacifiCorp (Oregon).png SVMediumOffice Burns O... 71 KB SVMidriseApartment Burns OR PacifiCorp (Oregon).png SVMidriseApartment Bur... 72 KB SVOutPatient Burns OR PacifiCorp (Oregon).png SVOutPatient Burns OR ... 69 KB SVPrimarySchool Burns OR PacifiCorp (Oregon).png

154

Patch Burning: Integrating Fire and Grazing  

E-Print Network (OSTI)

Patch Burning: Integrating Fire and Grazing to Promote Heterogeneity Patch Burning: Integrating Oklahoma Cooperative Extension Service Oklahoma State University June 2013 #12;#12;Patch Burning: Integrating Fire and Grazing to Promote Heterogeneity Patch Burning: Integrating Fire and Grazing to Promote

Balasundaram, Balabhaskar "Baski"

155

THE BURNING OF BIOMASS Economy, Environment, Health  

E-Print Network (OSTI)

THE BURNING OF BIOMASS Economy, Environment, Health Kees Kolff, MD, MPH April 21, 2012 #12;OUR #12;PT COGENERATION LLC A wood-burning cogeneration power plant - Generates electricity (for sale off paper making process, black and white liquor , sludge #12;SLASH BURNING Slash burned in 2008: Jefferson

156

FROM YEARNING TO BURNING Marshall Rosenbluth  

E-Print Network (OSTI)

FROM YEARNING TO BURNING Marshall Rosenbluth Possible broad-brush guidelines for "burning plasma" thinking December 6, 2000 The "yearn to burn" is well motivated. Most of us came into the fusion program for many years, the point at which science and the fusion energy goal converge is in a burning plasma

157

Patch Burning: Integrating Fire and Grazing  

E-Print Network (OSTI)

Patch Burning: Integrating Fire and Grazing to Promote Heterogeneity Patch Burning: Integrating Oklahoma Cooperative Extension Service Oklahoma State University September 2007 #12;#12;Patch Burning: Integrating Fire and Grazing to Promote Heterogeneity Patch Burning: Integrating Fire and Grazing to Promote

Debinski, Diane M.

158

SUBCHAPTER D. OUTDOOR BURNING Sec. 352.081. REGULATION OF OUTDOOR BURNING. (a) In this  

E-Print Network (OSTI)

SUBCHAPTER D. OUTDOOR BURNING Sec. 352.081. REGULATION OF OUTDOOR BURNING. (a) In this section measurement that takes into consideration the burning index, spread component, or ignition component court of a county by order may prohibit or restrict outdoor burning in general or outdoor burning

159

Lean Transformation in the U.S. Aerospace Industry: Appreciating Interdependent Social and Technical Systems  

E-Print Network (OSTI)

Lean practices and principles build on a half-century of successive initiatives aimed at transforming social and technical systems in organizations. While they are send as ...

CUTCHER-GERSHENFELD, JOEL

2003-05-02T23:59:59.000Z

160

Optimizing a lean logistic system and the identification of its breakdown points.  

E-Print Network (OSTI)

??Lean manufacturing has become the goal of most manufacturing plants. It is based on a set of principles that were developed by Taiichi Ohno to… (more)

AlRifai, Nasser B.

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Flame Response Mechanisms and their Interaction in a Lean Premixed Swirl-Stabilized Gas Turbine Combustor.  

E-Print Network (OSTI)

??To satisfy increasingly stringent environmental regulations, gas turbine engines are run in a lean premixed mode. Unfortunately, operating in this mode greatly increases the flame’s… (more)

Jones, Brian

2011-01-01T23:59:59.000Z

162

Hydrogen Burning on Magnetar Surfaces  

E-Print Network (OSTI)

We compute the rate of diffusive nuclear burning for hydrogen on the surface of a "magnetar" (Soft Gamma-Ray Repeater or Anomalous X-Ray Pulsar). We find that hydrogen at the photosphere will be burned on an extremely rapid timescale of hours to years, depending on composition of the underlying material. Improving on our previous studies, we explore the effect of a maximally thick "inert" helium layer, previously thought to slow down the burning rate. Since hydrogen diffuses faster in helium than through heavier elements, we find this helium buffer actually increases the burning rate for magnetars. We compute simple analytic scalings of the burning rate with temperature and magnetic field for a range of core temperature. We conclude that magnetar photospheres are very unlikely to contain hydrogen. This motivates theoretical work on heavy element atmospheres that are needed to measure effective temperature from the observed thermal emission and constrains models of AXPs that rely on magnetar cooling through thick light element envelopes.

P. Chang; P. Arras; L. Bildsten

2004-10-18T23:59:59.000Z

163

Biomass Burning Observation Project Specifically,  

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

Burning Observation Project Burning Observation Project Specifically, the aircraft will obtain measurements of the microphysical, chemical, hygroscopic, and optical properties of aerosols. Data captured during BBOP will help scientists better understand how aerosols combine and change at a variety of distances and burn times. Locations Pasco, Washington. From July through September, the G-1 will be based out of its home base in Washington. From this location, it can intercept and measure smoke plumes from naturally occurring uncontrolled fires across Washington, Oregon, Idaho, Northern California, and Western Montana. Smoke plumes aged 0-5 hours are the primary targets for this phase of the campaign. Memphis, Tennessee. In October, the plane moves to Tennessee to sample prescribed

164

Advanced Research  

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

05/2007 05/2007 NitrogeN evolutioN aNd CorrosioN MeChaNisMs With oxyCoMbustioN of Coal Description Under a grant from the University Coal Research (UCR) program, Brigham Young University (BYU) is leading a three-year research effort to investigate the physical processes that several common types of coal undergo during oxy-fuel combustion. Specifically, research addresses the mixture of gases emitted from burning, particularly such pollutants as nitrogen oxides (NO X ) and carbon dioxide (CO 2 ), and the potential for corrosion at the various stages of combustion. The UCR program is administered by the Advanced Research Program at the National Energy Technology Laboratory (NETL), under the U.S. Department of Energy's Office of

165

Open Burning (New Mexico) | Department of Energy  

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

Open Burning (New Mexico) Open Burning (New Mexico) Open Burning (New Mexico) < Back Eligibility Commercial Construction General Public/Consumer Industrial Residential Program Info Start Date 2003 State New Mexico Program Type Environmental Regulations Provider New Mexico Environment Department The New Mexico Environment Department's Air Quality Bureau regulates the open burning rules established by the Environmental Improvement Board. These rules are established to protect public health and welfare by establishing controls on pollution produced by open burning. Open burning is allowed for recreational and ceremonial purposes, for barbecuing, for heating purposes in fireplaces, for the noncommercial cooking of food for human consumption and for warming by small wood fires at construction

166

Paradigm Shift: Burning Coal to Geothermal | Department of Energy  

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

Paradigm Shift: Burning Coal to Geothermal Paradigm Shift: Burning Coal to Geothermal Paradigm Shift: Burning Coal to Geothermal 20121120ballstatepresentation.pdf More Documents...

167

Practical tip: Precooling topical calcineurin inhibitors tube; reduces burning sensation  

E-Print Network (OSTI)

inhibitors tube; reduces burning sensation Sultan Al-salkhenaizan@hotmail.com Abstract Burning sensation at theuse, does reduce the burning sensation and enable most

Al-Khenaizan, Sultan

2010-01-01T23:59:59.000Z

168

FUEL INTERCHANGEABILITY FOR LEAN PREMIXED COMBUSTION IN GAS TURBINE ENGINES  

DOE Green Energy (OSTI)

In response to environmental concerns of NOx emissions, gas turbine manufacturers have developed engines that operate under lean, pre-mixed fuel and air conditions. While this has proven to reduce NOx emissions by lowering peak flame temperatures, it is not without its limitations as engines utilizing this technology are more susceptible to combustion dynamics. Although dependent on a number of mechanisms, changes in fuel composition can alter the dynamic response of a given combustion system. This is of particular interest as increases in demand of domestic natural gas have fueled efforts to utilize alternatives such as coal derived syngas, imported liquefied natural gas and hydrogen or hydrogen augmented fuels. However, prior to changing the fuel supply end-users need to understand how their system will respond. A variety of historical parameters have been utilized to determine fuel interchangeability such as Wobbe and Weaver Indices, however these parameters were never optimized for today’s engines operating under lean pre-mixed combustion. This paper provides a discussion of currently available parameters to describe fuel interchangeability. Through the analysis of the dynamic response of a lab-scale Rijke tube combustor operating on various fuel blends, it is shown that commonly used indices are inadequate for describing combustion specific phenomena.

Don Ferguson; Geo. A. Richard; Doug Straub

2008-06-13T23:59:59.000Z

169

Green and Lean Paradigms Influence on Sustainable Business Development of Manufacturing Supply Chains  

Science Conference Proceedings (OSTI)

Green and lean paradigms have been adopted in a supply chain management context, but nearly always separately and with little understanding of their influence on supply chain performance and sustainable business development. This paper proposes a theoretical ... Keywords: Green, Lean, Manufacturing, Supply Chain Management, Sustainability

Susana Garrido Azevedo; Helena Carvalho; Susana Duarte; V. Cruz-Machado

2011-07-01T23:59:59.000Z

170

Diesel Fuel Sulfur Effects on the Performance of Lean NOx Catalysts  

DOE Green Energy (OSTI)

Evaluate the effects of diesel fuel sulfur on the performance of low temperature and high temperature Lean-NOx Catalysts. Evaluate the effects of up to 250 hours of aging on the performance of the Lean-NOx Catalysts with different fuel sulfur contents.

Ren, Shouxian

2000-08-20T23:59:59.000Z

171

Applicability of lean manufacturing and quick response manufacturing in a high-mix low-volume environment  

E-Print Network (OSTI)

As today's manufacturers face increasing pressure to improve costs and compete globally, many are turning to the philosophy of Lean Manufacturing as exemplified by the Toyota Production System. Lean is most successful when ...

Joing, Matthew J. (Matthew John), 1972-

2004-01-01T23:59:59.000Z

172

Biomass Burning: A Driver for Global Change!  

Science Conference Proceedings (OSTI)

Biomass burning includes the burning of the world''s vegetation---forests, savannas, and agricultural lands---to clear the land and change its use. Only in the past decade have researchers realized the important contributions of biomass burning to the ...

Levine J. S.; III W. R. Cofer; Jr D. R. Cahoon; Winstead E. L.

1995-01-01T23:59:59.000Z

173

7, 80178033, 2007 burning-tropopause  

E-Print Network (OSTI)

ACPD 7, 8017­8033, 2007 Biomass burning-tropopause mixing J. Brioude et al. Title Page Abstract Discussions Mixing between a stratospheric intrusion and a biomass burning plume J. Brioude1 , O. R. Cooper1.brioude@noaa.gov) 8017 #12;ACPD 7, 8017­8033, 2007 Biomass burning-tropopause mixing J. Brioude et al. Title Page

Paris-Sud XI, Université de

174

TQ2. Global Biomass Burning What is the impact of global biomass burning on the terrestrial  

E-Print Network (OSTI)

TQ2. Global Biomass Burning What is the impact of global biomass burning on the terrestrial and land use. MODIS active fire detections 2000-2006 for Southern California 2001-2004 mean annual burned (bottom), expressed as fraction of grid cell that burns each year. From Giglio et al. (2005), Atmos. Chem

Christian, Eric

175

Schoenberg, Chang, Pompa, Woods, Xu. Burning Index. 1 RH: Burning index in Los Angeles  

E-Print Network (OSTI)

Schoenberg, Chang, Pompa, Woods, Xu. Burning Index. 1 RH: Burning index in Los Angeles A Critical Assessment of the Burning Index in Los Angeles County, California Frederic Paik SchoenbergA,E , Chien: The effectiveness of the Burning Index (BI) in predicting wildfire ac- tivity is assessed using 25 years of area

Schoenberg, Frederic Paik (Rick)

176

Schoenberg, Chang, Keeley, Pompa, Woods, Xu. Burning Index. 1 RH: Burning index in Los Angeles  

E-Print Network (OSTI)

Schoenberg, Chang, Keeley, Pompa, Woods, Xu. Burning Index. 1 RH: Burning index in Los Angeles A Critical Assessment of the Burning Index in Los Angeles County, California Frederic Paik Schoenberg: The effectiveness of the Burning Index (BI) in predicting wildfire ac- tivity is assessed using 25 years of area

Schoenberg, Frederic Paik (Rick)

177

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

178

COMPARISON OF PLASMA-CATALYST AND ACTIVE LEAN NOx CATALYST  

DOE Green Energy (OSTI)

A number of NO{sub x} control systems are being discussed for potential application to diesel engines. Unfortunately, it can be difficult to compare systems on an equal basis because data are run under different conditions, or reported against different test cycles, or not shown over a range of operating conditions. In addition, the fuel consumption penalty associated with the NO{sub x} control technologies is not always reported. In this paper, we compare two diesel NO{sub x} aftertreatment systems: (1) Plasma-Catalyst (PC): a nonthermal plasma followed by a catalyst; and (2) Active Lean NO{sub x} Catalyst (ALNC): a NO{sub x} catalyst designed to selectively reduce NO{sub x} using hydrocarbon (HC) in the form of diesel fuel. Fuel is added to the exhaust to increase HC above normal diesel levels. These systems will be described in more detail in this report.

Hoard, John

2000-08-20T23:59:59.000Z

179

Flashback detection sensor for lean premix fuel nozzles  

DOE Patents (OSTI)

A sensor for detecting the flame occurring during a flashback condition in the fuel nozzle of a lean premix combustion system is presented. The sensor comprises an electrically isolated flashback detection electrode and a guard electrode, both of which generate electrical fields extending to the walls of the combustion chamber and to the walls of the fuel nozzle. The sensor is positioned on the fuel nozzle center body at a location proximate the entrance to the combustion chamber of the gas turbine combustion system. The sensor provides 360.degree. detection of a flashback inside the fuel nozzle, by detecting the current conducted by the flame within a time frame that will prevent damage to the gas turbine combustion system caused by the flashback condition.

Thornton, Jimmy Dean (Morgantown, WV); Richards, George Alan (Morgantown, WV); Straub, Douglas L. (Morgantown, WV); Liese, Eric Arnold (Morgantown, WV); Trader, Jr., John Lee (Morgantown, WV); Fasching, George Edward (Morgantown, WV)

2002-08-06T23:59:59.000Z

180

Three-Dimensional Composite Nanostructures for Lean NOx Emission Control  

SciTech Connect

This final report to the Department of Energy (DOE) and National Energy Technology Laboratory (NETL) for DE-EE0000210 covers the period from October 1, 2009 to July 31, 2013. Under this project, DOE awarded UConn about $1,248,242 to conduct the research and development on a new class of 3D composite nanostructure based catalysts for lean NOx emission control. Much of the material presented here has already been submitted to DOE/NETL in quarterly technical reports. In this project, through a scalable solution process, we have successfully fabricated a new class of catalytic reactors, i.e., the composite nanostructure array (nano-array) based catalytic converters. These nanocatalysts, distinct from traditional powder washcoat based catalytic converters, directly integrate monolithic substrates together with nanostructures with well-defined size and shape during the scalable hydrothermal process. The new monolithic nanocatalysts are demonstrated to be able to save raw materials including Pt-group metals and support metal oxides by an order of magnitude, while perform well at various oxidation (e.g., CO oxidation and NO oxidation) and reduction reactions (H{sub 2} reduction of NOx) involved in the lean NOx emissions. The size, shape and arrangement of the composite nanostructures within the monolithic substrates are found to be the key in enabling the drastically reduced materials usage while maintaining the good catalytic reactivity in the enabled devices. The further understanding of the reaction kinetics associated with the unique mass transport and surface chemistry behind is needed for further optimizing the design and fabrication of good nanostructure array based catalytic converters. On the other hand, the high temperature stability, hydrothermal aging stability, as well as S-poisoning resistance have been investigated in this project on the nanocatalysts, which revealed promising results toward good chemical and mechanical robustness, as well as S-poisoning resistance. Further investigation is needed for unraveling the understanding, design and selection principles of this new class of nanostructure based monolithic catalysts.

Gao, Pu-Xian

2013-07-31T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

New Computer Codes Unlock the Secrets of Cleaner Burning Coal  

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

Codes Codes Unlock the Secrets of Cleaner Burning Coal New Computer Codes Unlock the Secrets of Cleaner Burning Coal March 29, 2012 | Tags: Advanced Scientific Computing Research (ASCR), Combustion, Franklin, Hopper Linda Vu, lvu@lbl.gov, +1 510 495 2402 The Polk Power Station near Mulberry, Florida, is an Integrated Gasification Combined Cycle gasification plant. It is capable of generating 313 megawatts of electricity - 250 megawatts of which are supplied to the electric grid. The plant's gas cleaning technology removes more than 98 percent of the sulfur in coal, converting it to a commercial product. Nitrogen oxide emissions are reduced by more than 90 percent. (Photo courtesy of DOE-NETL) Approximately half of all electricity used in the United States comes from

182

TIME-VARYING FLAME IONIZATION SENSING APPLIED TO NATURAL GAS AND PROPANE BLENDS IN A PRESSURIZED LEAN PREMIXED (LPM) COMBUSTOR  

SciTech Connect

In-situ monitoring of combustion phenomena is a critical need for optimal operation and control of advanced gas turbine combustion systems. The concept described in this paper is based on naturally occurring flame ionization processes that accompany the combustion of hydrocarbon fuels. Previous work has shown that flame ionization techniques may be applied to detect flashback, lean blowout, and some aspects of thermo-acoustic combustion instabilities. Previous work has focused on application of DC electric fields. By application of time-varying electric fields, significant improvements to sensor capabilities have been observed. These data have been collected in a lean premixed combustion test rig operating at 0.51-0.76 MPa (5-7.5 atm) with air preheated to 588 K (600°F). Five percent of the total fuel flow is injected through the centerbody tip as a diffusion pilot. The fuel composition is varied independently by blending approximately 5% (volume) propane with the pipeline natural gas. The reference velocity through the premixing annulus is kept constant for all conditions at a nominal value of 70 m/s. The fuel-air equivalence ratio is varied independently from 0.46 – 0.58. Relative to the DC field version, the time-varying combustion control and diagnostic sensor (TV-CCADS) shows a significant improvement in the correlation between the measured flame ionization current and local fuel-air equivalence ratio. In testing with different fuel compositions, the triangle wave data show the most distinct change in flame ionization current in response to an increase in propane content. Continued development of this sensor technology will improve the capability to control advanced gas turbine combustion systems, and help address issues associated with variations in fuel supplies.

D. L. Straub; B. T. Chorpening; E. D. Huckaby; J. D. Thornton; W. L. Fincham

2008-06-13T23:59:59.000Z

183

Evolution of Massive Stars Up to the End of Central Oxygen Burning  

E-Print Network (OSTI)

We present a detailed study of the evolution of massive stars of masses 15, 20, 25 and 30 $\\msun$ assuming solar-like initial chemical composition. The stellar sequences were evolved through the advanced burning phases up to the end of core oxygen burning. We present a careful analysis of the physical characteristics of the stellar models. In particular, we investigate the effect of the still unsettled reaction $^{12}$C($\\alpha$,$\\gamma$)$^{16}$O on the advanced evolution by using recent compilations of this rate. We find that this rate has a significant impact on the evolution not only during the core helium burning phase, but also during the late burning phases, especially the shell carbon-burning. We have also considered the effect of different treatment of convective instability based on the Ledoux criterion in regions of varying molecular weight gradient during the hydrogen and helium burning phases. We compare our results with other investigations whenever available. Finally, our present study constitutes the basis of analyzing the nucleosynthesis processes in massive stars. In particular we will present a detail analysis of the {\\it s}-process in a forthcoming paper.

Mounib F. El Eid; Bradley S. Meyer; Lih-Sin The

2004-07-21T23:59:59.000Z

184

Advanced hydrogen/method utilization technology demonstration. Final report  

DOE Green Energy (OSTI)

The overall objective of the work was to seek homogeneous blend ratios of hydrogen:methane that provide ``leverage`` with respect to exhaust emissions or engine performance. The leverage sought was a reduction in exhaust emissions or improved efficiency in proportions greater than the percentage of hydrogen energy in the blended fuel gas mixture. The scope of the study included the range of air/fuel mixtures from the lean limit to slightly richer than stoichiometric. This encompasses two important modes of engine operation for emissions control; lean burn pre-catalyst (some natural gas engines have no catalyst) and post-catalyst; and stoichiometric with three-way catalyst. The report includes a brief discussion of each of these modes.

Lynch, F.; Fulton, J. [Hydrogen Consultants, Inc., Littleton, CO (United States)

1994-04-01T23:59:59.000Z

185

NOX REDUCTION FOR LEAN EXHAUST USING PLASMA ASSISTED CATALYSIS  

DOE Green Energy (OSTI)

Currently CARB estimates on road diesel vehicles contribute 50% of the NOX and 78% of the particulates being discharged from mobile sources. Diesel emissions obviously must be reduced if future air quality targets are to be met. A critical technological barrier exists because there are no commercial technologies available, which can reduce NOX from diesel (lean), exhaust containing 5-15% O2 concentration. One promising approach to reducing NOX and particulates from diesel exhaust is to use a combination of plasma with catalyst. Plasma can be generated thermally or non-thermally. Thermal plasma is formed by heating the system to an exceedingly high temperature (>2000 C). High temperature requirements for plasma makes thermal plasma inefficient and requires skillful thermal management and hence is considered impractical for mobile applications. Non-thermal plasma directs electrical energy into the creation of free electrons, which in turn react with gaseous species thus creating plasma. A combination of non-thermal plasma with catalysts can be referred to Plasma Assisted Catalysts or PAC. PAC technology has been demonstrated in stationary sources where non-thermal plasma catalysis is carried out in presence of NH3 as a reductant. In stationary applications NO is oxidized to HNO3 and then into ammonium nitrate where it is condensed and removed. This approach is impractical for mobile application because of the ammonia requirement and the ultimate mechanism by which NOX is removed. However, if a suitable catalyst can be found which can use onboard fuel as reductant then the technology holds a considerable promise. NOX REDUCTION FOR LEAN EXHAUST USING PLASMA ASSISTED CATALYSIS Ralph Slone, B. Bhatt and Victor Puchkarev NOXTECH INC. In addition to the development of an effective catalyst, a non-thermal plasma reactor needs be scaled and demonstrated along with a reliable and cost effective plasma power source and onboard HC source needs to be proven. Under the work sponsored by DOE and SCAQMD Noxtech is developing a cost effective and reliable PAC system for mobile applications. The goal of the program is to develop a suitable catalyst with the ability to remove high levels of NOx at reasonable space velocities. This new catalyst will then be used to scale the technology to treat exhaust from 80Hp engine and eventually to demonstrate the technology on 200 and 400 Hp engine applications. Using the 2004 EPA proposed regulation as a standard, it is clear in order for PAC system to be commercially viable it needs to remove NOX by 70% or better. It is further assumed from past experience that 30,000 HR-1 space velocities are necessary to ensure a good compact design.

Bhatt, B.

2000-08-20T23:59:59.000Z

186

Actinide Burning in CANDU Reactors  

Science Conference Proceedings (OSTI)

Actinide burning in CANDU reactors has been studied as a method of reducing the actinide content of spent nuclear fuel from light water reactors, and thereby decreasing the associated long term decay heat load. In this work simulations were performed of actinides mixed with natural uranium to form a mixed oxide (MOX) fuel, and also mixed with silicon carbide to form an inert matrix (IMF) fuel. Both of these fuels were taken to a higher burnup than has previously been studied. The total transuranic element destruction calculated was 40% for the MOX fuel and 71% for the IMF. (authors)

Hyland, B.; Dyck, G.R. [Atomic Energy of Canada Limited, Chalk River, Ontario, K0J 1J0 (Canada)

2007-07-01T23:59:59.000Z

187

Development of a process for continuous creation of lean value in product development organizations  

E-Print Network (OSTI)

Ideas and methodologies of lean product development were developed into tools and processes that help product development organizations improve their performances. The definition of waste in product development processes ...

Kato, Jin

2005-01-01T23:59:59.000Z

188

Dr B Gail McLean | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

B Gail McLean B Gail McLean Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Staff Listings/Contact Information What's New Research Areas Scientific Highlights Reports & Activities Principal Investigators' Meetings BES Home Staff Listings/Contact Information Dr. B Gail McLean Print Text Size: A A A RSS Feeds FeedbackShare Page Team Lead Photochemistry and Biochemistry Program Manager Photosynthetic Systems Office of Basic Energy Sciences SC-22.1/Germantown Building U.S. Department of Energy 1000 Independence Avenue, SW Washington, D.C. 20585-1290 E-Mail:gail.mclean@science.doe.gov Phone: (301) 903-7807 Fax: (301) 903-0271 Dr. Gail McLean is Lead for the Photochemistry and Biochemistry Team in the Chemical Sciences, Geosciences, and Biosciences Division of the Office of

189

Fuel Effects on a Low-Swirl Injector for Lean Premixed Gas Turbines  

E-Print Network (OSTI)

of Engineering for Gas Turbines and Power-Transactions ofInjector for Lean Premixed Gas Turbines D. Littlejohn and R.11. IC ENGINE AND GAS TURBINE COMBUSTION SHORT TITLE: Fuel

Littlejohn, David

2008-01-01T23:59:59.000Z

190

The 8 June 1995 McLean, Texas, Storm. Part I: Observations of Cyclic Tornadogenesis  

Science Conference Proceedings (OSTI)

On 8 June 1995 scientists participating in the Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX) collected airborne Doppler radar data in a storm that produced a family of tornadoes near McLean, Texas. The Electra Doppler ...

David C. Dowell; Howard B. Bluestein

2002-11-01T23:59:59.000Z

191

Lean Aircraft Initiative Implementation Workshop #3: Customer and Supplier Integration Across the Supply Chain  

E-Print Network (OSTI)

The integration of customers and suppliers along the supply chain involves a fundamental transformation of the way business is conducted in the Aerospace industry. Lean Aerospace Initiative (LAI) members, as well as ...

Cutcher-Gershenfeld, Joel

192

Lean principle application in an automotive product development process with special emphasis on peer reviews  

E-Print Network (OSTI)

Global Automotive, a large US based, global manufacturer of automobiles, has made significant gains in manufacturing competitiveness, in part through application of a lean manufacturing approach to high volume assembly. A ...

Boren, Michael S. (Michael Stuart)

2009-01-01T23:59:59.000Z

193

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

194

Inter-company collaboration within a large lean supply chain initiative  

E-Print Network (OSTI)

Cisco and its four contract manufacturing partners are collaborating to implement a lean replenishment methodology across their supply chain. The new system is expected to result in minimized inventory exposure, increased ...

Mentzer, Maria Ritums

2009-01-01T23:59:59.000Z

195

In Situ Burning of Oil Spills  

Science Conference Proceedings (OSTI)

... burns, the Teflon filters were weighed and sealed in Petri dishes, while the ... terrain, solar heating and surface friction creates a tur- bulent wind field ...

2001-02-13T23:59:59.000Z

196

The Performance Culture of Burning Man.  

E-Print Network (OSTI)

??Theatre in the United States for the last twenty years has been evolving in scope by way of a cultural phenomenon known as Burning Man.… (more)

Clupper, Wendy Ann

2007-01-01T23:59:59.000Z

197

THE EFFECT OF SULFUR ON METHANE PARTIAL OXIDATION AND REFORMING PROCESSES FOR LEAN NOX TRAP CATALYSIS  

Science Conference Proceedings (OSTI)

Lean NOx trap catalysis has demonstrated the ability to reduce NOx emissions from lean natural gas reciprocating engines by >90%. The technology operates in a cyclic fashion where NOx is trapped on the catalyst during lean operation and released and reduced to N2 under rich exhaust conditions; the rich cleansing operation of the cycle is referred to as "regeneration" since the catalyst is reactivated for more NOx trapping after NOx purge. Creating the rich exhaust conditions for regeneration can be accomplished by catalytic partial oxidation of methane in the exhaust system. Furthermore, catalytic reforming of partial oxidation exhaust can enable increased quantities of H2 which is an excellent reductant for lean NOx trap regeneration. It is critical to maintain clean and efficient partial oxidation and reforming processes to keep the lean NOx trap functioning properly and to reduce extra fuel consumption from the regeneration process. Although most exhaust constituents do not impede partial oxidation and reforming, some exhaust constituents may negatively affect the catalysts and result in loss of catalytic efficiency. Of particular concern are common catalyst poisons sulfur, zinc, and phosphorous. These poisons form in the exhaust through combustion of fuel and oil, and although they are present at low concentrations, they can accumulate to significant levels over the life of an engine system. In the work presented here, the effects of sulfur on the partial oxidation and reforming catalytic processes were studied to determine any durability limitations on the production of reductants for lean NOx trap catalyst regeneration.

Parks, II, James E [ORNL; Ponnusamy, Senthil [ORNL

2006-01-01T23:59:59.000Z

198

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

199

Three-Dimensional Composite Nanostructures for Lean NOx Emission Control  

DOE Green Energy (OSTI)

In this project, through a scalable solution process, we have successfully fabricated a new class of catalytic reactors, i.e., the composite nanostructure array (nano-array) based catalytic converters. These nanocatalysts, distinct from traditional powder washcoat based catalytic converters, directly integrate monolithic substrates together with nanostructures with well-defined size and shape during the scalable hydrothermal process. The new monolithic nanocatalysts are demonstrated to be able to save raw materials including Pt-group metals and support metal oxides by an order of magnitude, while perform well at various oxidation (e.g., CO oxidation and NO oxidation) and reduction reactions (H{sub 2} reduction of NOx) involved in the lean NOx emissions. The size, shape and arrangement of the composite nanostructures within the monolithic substrates are found to be the key in enabling the drastically reduced materials usage while maintaining the good catalytic reactivity in the enabled devices. The further understanding of the reaction kinetics associated with the unique mass transport and surface chemistry behind is needed for further optimizing the design and fabrication of good nanostructure array based catalytic converters. On the other hand, the high temperature stability, hydrothermal aging stability, as well as S-poisoning resistance have been investigated in this project on the nanocatalysts, which revealed promising results toward good chemical and mechanical robustness, as well as S-poisoning resistance. Further investigation is needed for unraveling the understanding, design and selection principles of this new class of nanostructure based monolithic catalysts.

Gao, Pu-Xian

2013-07-31T23:59:59.000Z

200

Uniform-burning matrix burner  

DOE Patents (OSTI)

Computer simulation was used in the development of an inward-burning, radial matrix gas burner and heat pipe heat exchanger. The burner and exchanger can be used to heat a Stirling engine on cloudy days when a solar dish, the normal source of heat, cannot be used. Geometrical requirements of the application forced the use of the inward burning approach, which presents difficulty in achieving a good flow distribution and air/fuel mixing. The present invention solved the problem by providing a plenum with just the right properties, which include good flow distribution and good air/fuel mixing with minimum residence time. CFD simulations were also used to help design the primary heat exchanger needed for this application which includes a plurality of pins emanating from the heat pipe. The system uses multiple inlet ports, an extended distance from the fuel inlet to the burner matrix, flow divider vanes, and a ring-shaped, porous grid to obtain a high-temperature uniform-heat radial burner. Ideal applications include dish/Stirling engines, steam reforming of hydrocarbons, glass working, and any process requiring high temperature heating of the outside surface of a cylindrical surface.

Bohn, Mark S. (Golden, CO); Anselmo, Mark (Arvada, CO)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Microsoft Word - Deep-Burn awardee team members _2_.doc  

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

DEEP-BURN AWARDEES RECIPIENTS RECIPIENT TEAM MEMBERS Advanced Modeling and Simulation Capability R&D for $1 million University of Chicago Argonne Argonne National Laboratory Oak Ridge National Laboratory Lawrence Livermore National Lab University of Michigan Transuranic Management Capabilities R&D for $6.3 million Battelle Energy Alliance, LLC Idaho National Laboratory Oak Ridge National Laboratory Argonne National Laboratory Los Alamos National Laboratory University of California, Berkeley University of Wisconsin University of Tennessee University of Nevada Las Vegas North Carolina State University Georgia Institute of Technology Pennsylvania State University Idaho State University Texas A&M University Logos Technologies

202

AIAA 2001-0339 INTERMITTENT BURNING AND ITS  

E-Print Network (OSTI)

AIAA 2001-0339 INTERMITTENT BURNING AND ITS CONTRIBUTION TO PLATEAU BURNING OF COMPOSITE and Astronautics, Inc. with permission. INTERMITTENT BURNING AND ITS CONTRIBUTION TO PLATEAU BURNING OF COMPOSITE; Fellow AIAA §Senior Research Engineer Abstract The plateau burning behavior of composite solid

Seitzman, Jerry M.

203

Deep burn strategy for the optimized incineration of reactor waste plutonium in pebble bed high temperature gas–cooled reactors / Serfontein D.E.  

E-Print Network (OSTI)

??In this thesis advanced fuel cycles for the incineration, i.e. deep–burn, of weapons–grade plutonium, reactor–grade plutonium from pressurised light water reactors and reactor–grade plutonium +… (more)

Serfontein, Dawid Eduard.

2013-01-01T23:59:59.000Z

204

Lean NOx Trap Modeling in Vehicle Systems Simulations  

DOE Green Energy (OSTI)

A one-dimensional model for simulating lean NOx trap (LNT) performance is developed and validated using both steady state cycling data and transient data from FTP testing cycles. The model consists of the conservation equations for chemical species and energy in the bulk flow, energy of the solid walls, O2 storage and NOx storage (in the form of nitrites and nitrates). Nitrites and nitrates are formed by diffusion of NO and NO2, respectively, into sorbent particles (assumed to be hemi-spherical in shape) along with O2 and their formation rates are controlled by chemical kinetics as well as solid-phase diffusion rates of NOx species. The model also accounts for thermal aging and sulfation of LNTs. Empirical correlations are developed on the basis of published experimental data to capture these effects. These empirical correlations depend on total mileage for which the LNT has been in use, the mileage accumulated since the last desulfation event in addition to the freshly degreened catalyst characteristics. The model has been used in studies of vehicle systems (integration, performance etc.) including hybrid powertrain configurations. Since the engines in hybrid vehicles turn on and off multiple number of times during single drive cycles, the exhaust systems may encounter multiple cold start transients. Accurate modeling of catalyst warm-up and cooling is, therefore, very important to simulate LNT performance in such vehicles. For this purpose, the convective heat loss from the LNT to the ambient is modeled using a Nusselt number correlation that includes effects of both forced convection and natural convection (with later being important when vehicle is stationary). Using the model, the fuel penalty associated with operating LNTs on small diesel engine powered car during FTP drive cycles is estimated.

Gao, Zhiming [ORNL; Chakravarthy, Veerathu K [ORNL; Daw, C Stuart [ORNL; Conklin, Jim [ORNL

2010-09-01T23:59:59.000Z

205

Mitigation of Sulfur Effects on a Lean NOx Trap Catalyst by Sorbate Reapplication  

DOE Green Energy (OSTI)

Lean NOx trap catalysis has demonstrated the ability to reduce NOx emissions from lean natural gas reciprocating engines by >90%. The technology operates in a cyclic fashion where NOx is trapped on the catalyst during lean operation and released and reduced to N2 under rich exhaust conditions; the rich cleansing operation of the cycle is referred to as "regeneration" since the catalyst is reactivated for more NOx trapping. Natural gas combusted over partial oxidation catalysts in the exhaust can be used to obtain the rich exhaust conditions necessary for catalyst regeneration. Thus, the lean NOx trap technology is well suited for lean natural gas engine applications. One potential limitation of the lean NOx trap technology is sulfur poisoning. Sulfur compounds directly bond to the NOx trapping sites of the catalyst and render them ineffective; over time, the sulfur poisoning leads to degradation in overall NOx reduction performance. In order to mitigate the effects of sulfur poisoning, a process has been developed to restore catalyst activity after sulfur poisoning has occurred. The process is an aqueous-based wash process that removes the poisoned sorbate component of the catalyst. A new sorbate component is reapplied after removal of the poisoned sorbate. The process is low cost and does not involve reapplication of precious metal components of the catalyst. Experiments were conducted to investigate the feasibility of the washing process on a lean 8.3-liter natural gas engine on a dynamometer platform. The catalyst was rapidly sulfur poisoned with bottled SO2 gas; then, the catalyst sorbate was washed and reapplied and performance was re-evaluated. Results show that the sorbate reapplication process is effective at restoring lost performance due to sulfur poisoning. Specific details relative to the implementation of the process for large stationary natural gas engines will be discussed.

Parks, II, James E [ORNL

2007-01-01T23:59:59.000Z

206

Visualizing Buoyant Burning Bubbles in Type Ia Supernovae at...  

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

Burning in Supernovae Buoyant Burning Bubbles in Type Ia Supernovae bubble-s.jpeg Flame ignition in type Ia supernovae leads to isolated bubbles of burning buoyant fluid. As a...

207

Effects of flow transients on the burning velocity of hydrogen-air premixed flames  

DOE Green Energy (OSTI)

The effects of unsteady strain rate on the burning velocity of hydrogen-air premixed flames are studied in an opposed nozzle configuration. The numerical method employs adaptive time integration of a system of differential-algebraic equations. Detailed hydrogen-air kinetic mechanism and transport properties are considered. The equivalence ratio is varied from lean to rich premixtures in order to change the effective Lewis number. Steady Markstein numbers for small strain rate are computed and compared with experiment. Different definitions of flame burning velocity are examined under steady and unsteady flow conditions. It is found that, as the unsteady frequency increases, large deviations between different flame speeds are noted depending on the location of the flame speed evaluation. Unsteady flame response is investigated in terms of the Markstein transfer function which depends on the frequency of oscillation. In most cases, the flame speed variation attenuates at higher frequencies, as the unsteady frequency becomes comparable to the inverse of the characteristic flame time. Furthermore, unique resonance-like behavior is observed for a range of rich mixture conditions, consistent with previous studies with linearized theory.

H. G. Im; J. H. Chen

2000-07-30T23:59:59.000Z

208

REMOTE SENSING OF BURN SEVERITY AND THE INTERACTIONS BETWEEN BURN SEVERITY, TOPOGRAPHY AND VEGETATION IN INTERIOR ALASKA  

E-Print Network (OSTI)

REMOTE SENSING OF BURN SEVERITY AND THE INTERACTIONS BETWEEN BURN SEVERITY, TOPOGRAPHY likely to change vegetation type. Finally, vegetation recovery, estimated using a remotely-sensed................................................................................6 Chapter 2. Mapping Burn Severity Using Satellite Remote Sensing..........................8

Ruess, Roger W.

209

FESAC Panel on Burning Plasmas 1.What scientific issues should be addressed by a burning plasma physics experiment and  

E-Print Network (OSTI)

FESAC Panel on Burning Plasmas Charge 1.What scientific issues should be addressed by a burning of using various magnetic confinement concepts in studying burning plasma physics? As a part of your

210

Japanese industrial research on lean combustion: A case study: International Research Monitoring Program  

DOE Green Energy (OSTI)

In recent years, Japanese automakers have introduced a number of successful lean-combustion engines. These engines, in addition to the general expertise in building small cars, have made the Japanese automobiles into the gas mileage champions of the US market. The lean-combustion engines also provide very satisfactory performance and acceptable emissions. United States automakers and research managers, who were probably better informed about lean-combustion than the Japanese were, actively investigated lean-combustion but did not develop an engine. This report examines the basis for the Japanese innovations, the research that took the Japanese past the US state of the art to permit engine development. A preliminary review of recent (1980s) Japanese literature did not turn up strong evidence of new research activity in the lean-combustion area, but did provide background on new engines developed by several major manufacturers. The study was conducted solely through the Japanese and US published literature, with emphasis on early research conducted in the 1970s. This report presents an example of how Japanese research progress can be examined by reviewing the Japanese research literature. Although useful information was obtained by this method, it is still difficult to get a complete picture. When reviewing the literature, as was done for this report, one must remember that the marginal use of references by Japanese researchers obscures prior work, as does the tendency of the Japanese to publish several articles on similar or identical topics. 50 refs., 15 figs.

Hane, G.J.; Hutchinson, R.A.

1987-08-01T23:59:59.000Z

211

The QSE-Reduced Nuclear Reaction Network for Silicon Burning.  

E-Print Network (OSTI)

??Iron and neighboring nuclei are formed by silicon burning in massive stars before core collapse and during supernova outbursts. Complete and incomplete silicon burning is… (more)

Parete-Koon, Suzanne T

2008-01-01T23:59:59.000Z

212

OLIGOMERIZATION OF LEVOGLUCOSAN IN PROXIES OF BIOMASS BURNING AEROSOLS.  

E-Print Network (OSTI)

??Biomass burning aerosols play an important role in the chemistry and physics of the atmosphere and therefore, affect global climate. Biomass burning aerosols are generally… (more)

Holmes, Bryan J.

213

UNCORRECTED 2 Burning biodiversity: Woody biomass use by commercial  

E-Print Network (OSTI)

UNCORRECTED PROOF 2 Burning biodiversity: Woody biomass use by commercial 3 and subsistence groups as: Lisa Naughton-Treves et al., Burning biodiversity: Woody biomass use by commercial

Kammen, Daniel M.

214

An investigation of lean combustion in a natural gas-fueled spark-ignited engine  

SciTech Connect

The objective of this work was to investigate the performance and emission characteristics of natural gas in an original equipment manufacturer (OEM), light-duty, spark-ignited engine being operated in the lean fueling regime and compare the operation with gasoline fueling cases. Data were acquired for several operating conditions of speed, throttle position, air-fuel equivalence ratio, and spark timing for both fuels. Results showed that for stoichiometric fueling, with a naturally aspirated engine, a power loss of 10 to 15 percent can be expected for natural gas over gasoline fueling. For lean operation, however, power increases can be expected for equivalence ratios below about {phi} = 0.80 with natural gas fueling as compared to gasoline. Higher brake thermal efficiencies can also be expected with natural gas fueling with maximum brake torque (MBT) timings over the range of equivalence ratios investigated in this work. Coefficient of variation (COV) data based on the indicated mean effective pressure (IMEP) demonstrated that the engine is much less sensitive to equivalence ratio leaning for natural gas fueling as compared to gasoline cases. The lean limit for a COV of 10 percent was about {phi} = 0.72 for gasoline and {phi} = 0.63 for natural gas. Lean fueling resulted in significantly reduced NO{sub x} levels where a lower plateau for NO{sub x} concentrations was reached at {phi} near or below 0.70, which corresponded to about 220 ppm. For natural gas fueling, this corresponded to about 1.21 gm/kW-h. Finally, with MBT timings, relatively short heat release durations were obtained for lean fueling with natural gas compared to gasoline.

Gupta, M.; Bell, S.R.; Tillman, S.T. [Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Mechanical Engineering

1996-06-01T23:59:59.000Z

215

Wood-Burning Heating System Deduction  

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

This statute allows individual taxpayers a deduction for the purchase and installation of a wood-burning heating system. The deduction is equal to the total cost of purchase and installation for...

216

Clean Burn Fuels LLC | Open Energy Information  

Open Energy Info (EERE)

developer planning to build a 60m gallons per year (227.12m litres per year) bioethanol plant in Raeford, North Carolina. References Clean Burn Fuels LLC1 LinkedIn...

217

The lean oxidation of iso-octane at elevated pressures  

DOE Green Energy (OSTI)

Both spark-ignition and compression-ignition engines burn large molecular-weight blended fuels, a class to which the primary reference fuels (PRF), n-heptane and iso-octane belong. In this study experiments were performed using iso-octane in a high pressure flow reactor at a temperature of 925 K, at 3, 6 and 9 atm pressure and with a fuel/air equivalence ratio of approximately 0.05. Many hydrocarbon and oxygenated hydrocarbon intermediates were identified and quantified as a function of time. These experimental results provide a strin- gent test of the low temperature chemistry portion of a kinetic model as they emphasise the importance of alkyl radical addition to molecular oxygen and internal H-atom isomerization reactions relative to alkyl radical decomposition reactions. A detailed chemical kinetic mechanism is used to simulate these experiments. We provide comparisons of model predictions with experimentally measured species profiles and describe how each species is formed as predicted by the detailed model.

Chen, J S; Curran, H J; Litzinger, T A

1998-10-30T23:59:59.000Z

218

User Developed Applications and Information Systems Success: A Test of DeLone and McLean's Model  

Science Conference Proceedings (OSTI)

DeLone and McLean's 1992 model of information systems success has received much attention amongst researchers. This study provides the first empirical test of an adaptation of DeLone and McLean's model in the user-developed application domain. The model ...

Tanya McGill; Valerie Hobbs; Jane Klobas

2003-01-01T23:59:59.000Z

219

Effects of age and diet on plasma lipid and glucose concentrations in genetically lean or fat chickens  

E-Print Network (OSTI)

concentrations in genetically lean (LL) and fat (FL) male chickens. The fat birds always displayed lower glycemiaEffects of age and diet on plasma lipid and glucose concentrations in genetically lean or fat chickens B. LECLERCQ, D. HERMIER M. R. SALICHON Station de Recherches avico%s, I.N.R.A., Nouzilly, 37380

Recanati, Catherine

220

Leaning-based travel interfaces revisited: frontal versus sidewise stances for flying in 3D virtual spaces  

Science Conference Proceedings (OSTI)

In this paper we revisit the design of leaning-based travel interfaces and propose a design space to categorize existing implementations. Within the design space, frontal and sidewise stances when using a flying surfboard interface were compared through ... Keywords: 3d virtual spaces., leaning-based travel interface, navigation, stance

Jia Wang; Rob Lindeman

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Advanced Materials  

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

Advanced Materials Advanced Materials Availability Technology Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And...

222

Simulation of a Burning Plasma C. Kessel, PPPL  

E-Print Network (OSTI)

Simulation of a Burning Plasma Experiment C. Kessel, PPPL UFA Workshop on Burning Plasma Science, December 11-13, 2000 #12;FIRE Burning Plasma Discharge Simulation with TSC ELMy H-mode, N, R=2.0 m, Ip=6.5 MA #12;Burning Plasma Experiment Simultaneously Needs · L-H mode transition · Non

223

Global observations of desert dust and biomass burning aerosols  

E-Print Network (OSTI)

Global observations of desert dust and biomass burning aerosols Martin de Graaf KNMI #12; Outline · Absorbing Aerosol Index - Theory · Absorbing Aerosol Index - Reality · Biomass burning.6 Biomass burning over Angola, 09 Sep. 2004 Absorbing Aerosol Index PMD image #12;biomass burning ocean

Graaf, Martin de

224

Effects of Range Burning on Kansas Flint Hills Soil  

E-Print Network (OSTI)

Effects of Range Burning on Kansas Flint Hills Soil CLENTON E. OWENSBY AND JOHN BRUCE WYRILL, III Highlight: Two tallgrass prairie areas burned annually for 20 (grazed) nnd 48 (un. grazed) years ar-spring burned ungrared plots were generally higher in soil pH, organic ma~fer, and K than late-spring burned

Owensby, Clenton E.

225

Advanced Technology Vehicle Testing  

DOE Green Energy (OSTI)

The goal of the U.S. Department of Energy's Advanced Vehicle Testing Activity (AVTA) is to increase the body of knowledge as well as the awareness and acceptance of electric drive and other advanced technology vehicles (ATV). The AVTA accomplishes this goal by testing ATVs on test tracks and dynamometers (Baseline Performance testing), as well as in real-world applications (Fleet and Accelerated Reliability testing and public demonstrations). This enables the AVTA to provide Federal and private fleet managers, as well as other potential ATV users, with accurate and unbiased information on vehicle performance and infrastructure needs so they can make informed decisions about acquiring and operating ATVs. The ATVs currently in testing include vehicles that burn gaseous hydrogen (H2) fuel and hydrogen/CNG (H/CNG) blended fuels in internal combustion engines (ICE), and hybrid electric (HEV), urban electric, and neighborhood electric vehicles. The AVTA is part of DOE's FreedomCAR and Vehicle Technologies Program.

James Francfort

2004-06-01T23:59:59.000Z

226

Applied Catalysis B: Environmental 37 (2002) 2735 NOx reduction by urea under lean conditions over  

E-Print Network (OSTI)

Applied Catalysis B: Environmental 37 (2002) 27­35 NOx reduction by urea under lean conditions over using a single step sol­gel process (designated as 2% Pt-SG) and tested its activity for NOx reduction and hydrothermally stable in the range of 150­500 C in the reduction of NOx by hy- drocarbons or oxygenated

Gulari, Erdogan

227

Applied Catalysis A: General 226 (2002) 183192 NO reduction by urea under lean conditions  

E-Print Network (OSTI)

was tested for NOx reduction with aqueous urea solutions under oxidizing conditions. Our results show reduction of NOx in the exhaust of a lean Corresponding author. Tel.:+1-734-763-5941; fax:+1. These investigations have shown that the reduction of NOx in the exhaust of a diesel vehicle is still challenging due

Gulari, Erdogan

228

Trade Secrets Laws and Production Efficiency: Model and Empirics from Lean Manufacturing ?  

E-Print Network (OSTI)

Model and Empirics from Lean Manufacturing How does the institutional environment affect production efficiency? Here, we model the effect of the legal protection of trade secrets on the effectiveness of efforts to reduce production cost. We show that, with stronger trade secrets protection, lean manufacturing will be more effective in reducing cost. However, stronger protection has conflicting effects on cost itself. Stronger protection reduces the spill-out of knowledge to competitors, which tends to reduce cost, but it also reduces spill-in of knowledge, which tends to raise cost. We test the model in the U.S. context, using a difference-in-differences design, exploiting changes in state-level trade secrets over time. Consistent with the model, stronger trade secrets protection was associated with a larger effect of lean manufacturing on inventories. An increase in the statutory protection of trade secrets by one standard deviation was associated with lean manufacturing reducing inventories by 2.9%. “Mr Ohno believed just-in-time was a manufacturing advantage for Toyota. And for many years, he would not allow anything to be recorded about it.... I think he also feared Americans would discover this powerful tool and use it against the

Jie Gong; I. P. L. Png

2013-01-01T23:59:59.000Z

229

Advanced Overfire Air system and design  

DOE Green Energy (OSTI)

The objective of the proposed project is to design, install and optimize a prototype advanced tangential OFA air system on two mass feed stoker boilers that can burn coal, biomass and a mixture of these fuels. The results will be used to develop a generalized methodology for retrofit designs and optimization of advanced OFA air systems. The advanced OFA system will reduce particulate and NOx emissions and improve overall efficiency by reducing carbon in the ash and excess oxygen. The advanced OFA will also provide capabilities for carrying full load and improved load following and transitional operations.

Gene berkau

2004-07-30T23:59:59.000Z

230

Mercury Control Technologies for Electric Utilities Burning Lignite Coal  

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

Mercury control technologies for Mercury control technologies for electric utilities Burning lignite coal Background In partnership with a number of key stakeholders, the U.S. Department of Energy's Office of Fossil Energy (DOE/FE), through its National Energy Technology Laboratory (NETL), has been carrying out a comprehensive research program since the mid-1990s focused on the development of advanced, cost-effective mercury (Hg) control technologies for coal-fired power plants. Mercury is a poisonous metal found in coal, which can be harmful and even toxic when absorbed from the environment and concentrated in animal tissues. Mercury is present as an unwanted by-product of combustion in power plant flue gases, and is found in varying percentages in three basic chemical forms(known as speciation): particulate-bound mercury, oxidized

231

Paradigm Shift: Burning Coal to Geothermal  

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

Paradigm Shift: Burning Coal Paradigm Shift: Burning Coal to Geothermal" November 20, 2012 jlowe@bsu.edu 765.285.2805 Ball State University Ball State University Administration Building 1899 Ball State 1920s Ball State University Ball State University (4) Coal Fired Boilers Installed 1941/1955 (3) Natural Gas Fired Boilers Installed in the 1970s Heat and Chilled Water Plant Operations Heat Plant: 4 Coal Fired Boilers 3 Natural Gas Fired Boilers 320,000 Lbs/Hr nameplate 240,000 Lbs/Hr current 700,000,000 Lbs/Year Chilled Water Plant: 5 Electrical Centrifugal Chillers 9,300 ton capacity 25,000,000 Ton Hours/Year Pollutants Produced from Burning 36,000 tons of Coal * Carbon Dioxide 85,000 tons (Global Warming)

232

Correlations between Optical, Chemical and Physical Properties of Biomass Burn Aerosols  

E-Print Network (OSTI)

laboratory measurements of biomass-burning emissions: 1.tar balls: Particles from biomass and biofuel burning, J.Eleuterio (2005), A review of biomass burning emissions part

2008-01-01T23:59:59.000Z

233

Do biomass burning aerosols intensify drought in equatorial Asia during El Niño?  

E-Print Network (OSTI)

fication of drought-induced biomass burning in Indonesiavariability in global biomass burning emissions from 1997 toChemistry and Physics Do biomass burning aerosols intensify

Tosca, M. G; Randerson, J. T; Zender, C. S; Flanner, M. G; Rasch, P. J

2010-01-01T23:59:59.000Z

234

Do biomass burning aerosols intensify drought in equatorial Asia during El Niño?  

E-Print Network (OSTI)

of drought-induced biomass burning in Indonesia since 1960,variability in global biomass burning emissions from 1997 toand Physics Do biomass burning aerosols intensify drought in

Tosca, M. G; Randerson, J. T; Zender, C. S; Flanner, M. G; Rasch, P. J

2010-01-01T23:59:59.000Z

235

Reactive burn models and ignition & growth concept  

SciTech Connect

Plastic-bonded explosives are heterogeneous materials. Experimentally, shock initiation is sensitive to small amounts of porosity, due to the formation of hot spots (small localized regions of high temperature). This leads to the Ignition and Growth concept, introduced by Lee and Tarver in 1980, as the basis for reactive burn models. A homogeneized burn rate needs to account for three mesoscale physical effects (i) the density of burnt hot spots, which depends on the lead shock strength; (ii) the growth of the burn fronts triggered by hot spots, which depends on the local deflagration speed; (iii) a geometric factor that accounts for the overlap of deflagration wavelets from adjacent hot spots. These effects can be combined and the burn model defined by specifying the reaction progress variable {lambda}(t) as a function of a dimensionless reaction length {tau}{sub hs}(t)/{ell}{sub hs}, rather than by xpecifying an explicit burn rate. The length scale {ell}{sub hs} is the average distance between hot spots, which is proportional to [N{sub hs}(P{sub s})]{sup -1/3}, where N{sub hs} is the number density of hot spots activated by the lead shock. The reaction length {tau}{sub hs}(t) = {line_integral}{sub 0}{sup t} D(P(t'))dt' is the distance the burn front propagates from a single hot spot, where D is the deflagration speed and t is the time since the shock arrival. A key implementation issue is how to determine the lead shock strength in conjunction with a shock capturing scheme. They have developed a robust algorithm for this purpose based on the Hugoniot jump condition for the energy. The algorithm utilizes the time dependence of density, pressure and energy within each cell. The method is independent of the numerical dissipation used for shock capturing. It is local and can be used in one or more space dimensions. The burn model has a small number of parameters which can be calibrated to fit velocity gauge data from shock initiation experiments.

Menikoff, Ralph S [Los Alamos National Laboratory; Shaw, Milton S [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

236

A New Type of Steady and Stable, Laminar, Premixed Flame in Ultra-Lean, Hydrogen-Air Combustion  

E-Print Network (OSTI)

411–422. [9] I. Glassman, Combustion, 3rd Edition, AcademicB. Lewis, G. von Elbe, Combustion, Flames and Explosions ofin Ultra-Lean, Hydrogen-Air Combustion Joseph F. Grcar a a

Grcar, Joseph F

2008-01-01T23:59:59.000Z

237

Reflective Terahertz Imaging for early diagnosis of skin burn severity  

E-Print Network (OSTI)

97 Fig 7.3 ‘Cross shaped’ brass brand used for burnFig 7.21 3-D drawing of the brass brand used for controlledfor imaging burns[10]. A brass brand heated to 315°C was

TEWARI, PRIYAMVADA

2013-01-01T23:59:59.000Z

238

Biomass Burning and the Production of Greenhouse Gases  

Science Conference Proceedings (OSTI)

Biomass burning is a source of greenhouse gases, carbon dioxide, methane, and nitrous oxide. In addition, biomass burning is a source of chemically active gases, including carbon monoxide, nonmethane hydrocarbons, and nitric oxide. These gases, along ...

Levine J. S.

1994-01-01T23:59:59.000Z

239

How much carbon dioxide is produced by burning gasoline and ...  

U.S. Energy Information Administration (EIA)

How much carbon dioxide is produced by burning gasoline and diesel fuel? About 19.64 pounds of carbon dioxide (CO 2) are produced from burning a gallon of gasoline ...

240

Materials challenges in advanced coal conversion technologies  

SciTech Connect

Coal is a critical component in the international energy portfolio, used extensively for electricity generation. Coal is also readily converted to liquid fuels and/or hydrogen for the transportation industry. However, energy extracted from coal comes at a large environmental price: coal combustion can produce large quantities of ash and CO{sub 2}, as well as other pollutants. Advanced technologies can increase the efficiencies and decrease the emissions associated with burning coal and provide an opportunity for CO{sub 2} capture and sequestration. However, these advanced technologies increase the severity of plant operating conditions and thus require improved materials that can stand up to the harsh operating environments. The materials challenges offered by advanced coal conversion technologies must be solved in order to make burning coal an economically and environmentally sound choice for producing energy.

Powem, C.A.; Morreale, B.D. [National Energy Technology Laboratory, Albany, OR (United States)

2008-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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.


241

Fly ash utilization in McLean County, North Dakota. Topical report, Task 7.25  

SciTech Connect

In 1989, the McLean County Commissioners requested assistance from personnel at the University of North Dakota Energy and Environmental Research Center (EERC) with the construction of a section of road and a boat ramp in their county. Assistance was sought from the EERC because the county`s construction plans called for partial replacement of the lime and portland cement normally used for soil stabilization with fly ash. Since the EERC had recently conducted several research projects dealing with the use of coal combustion by-products for road construction, the commissioners requested that EERC personnel help to determine appropriate formulas for the stabilized soil mixtures to be used for both the road and boat ramp applications. An additional incentive was provided when the management of the Coal Creek Power Plant offered to donate the necessary fly ash at no cost. This project was performed as a joint venture between McLean County and the EERC. The EERC was primarily responsible for conducting a laboratory testing program to develop soil stabilization mixtures for the two construction activities. These mixtures were to contain a relatively high percentage of fly ash and to exhibit sufficient strength and durability so that the road and boat ramp would both have a service life of 20 years or more. McLean County would be primarily responsible for the road and boat ramp construction activities. The funding for the EERC portion of the project was provided by the US Department of Energy through a joint venture support program.

Moretti, C.J.

1993-03-01T23:59:59.000Z

242

Burning Thermals in Type Ia Supernovae A. J. Aspden1  

E-Print Network (OSTI)

Burning Thermals in Type Ia Supernovae A. J. Aspden1 , J. B. Bell1 , S. Dong2 , and S. E. Woosley2 ABSTRACT We develop a one-dimensional theoretical model for thermals burning in Type Ia supernovae based for the burning and for the expansion of the thermal due to changes in the background stratification found

Bell, John B.

243

Burning Plasma Physics Technical Subgroup of the Magnetic  

E-Print Network (OSTI)

1 Burning Plasma Physics Technical Subgroup of the Magnetic Fusion Concepts Working Group 1999 Woolley, Stewart Zweben. #12;2 Contents 1. Introduction 3 2. Burning Plasma Physics Issues 8 2.1 Energetic and physics integration 22 3. Technical Readiness for a Burning Plasma Experiment 26 3.1 Background

244

Presented at UFA Burning Plasma Science Workshop II  

E-Print Network (OSTI)

FIRE D. Meade Presented at UFA Burning Plasma Science Workshop II General Atomics San Diego, CA May for a Next Step Experiment in Magnetic Fusion · Compact High Field Approach - General Parameters · Burning, Madison, WI · Charge for First and Second meetings Scientific value of a Burning Plasma experiment

245

Guanine tautomerism revealed by UVUV and IRUV hole burning spectroscopy  

E-Print Network (OSTI)

Guanine tautomerism revealed by UV­UV and IR­UV hole burning spectroscopy E. Nir Department spectroscopy. 1-methylguanine, in which the Keto­Enol tautomerism is blocked, shows hole burning spectra from hole burning SHB by using two counter- propagating dye laser pulses with a delay of about 150 ns

de Vries, Mattanjah S.

246

Stellar Burning Falk Herwig, Alexander Heger, and Frank  

E-Print Network (OSTI)

Stellar Burning and Mixing Falk Herwig, Alexander Heger, and Frank Timmes (T-6); and Rob Hueckstaedt and Rob Coker (X-2); fherwig@lanl.gov D uring most phases of stellar evolution, nuclear burning nuclear burning in convective regions in which mixing and nuclear energy release proceeds on comparable

Herwig, Falk

247

Electromagnetically induced transparency over spectral hole-burning  

E-Print Network (OSTI)

Electromagnetically induced transparency over spectral hole-burning temperature in a rare the spectral hole-burning temperature. The transmission of the probe laser beam is increased by a factor of exp over the spectral hole-burning temperature in a rare-earth­doped solid represents important progress

Shahriar, Selim

248

Supercritical Burning of Liquid Oxygen (LOX) Droplet with Detailed Chemistry  

E-Print Network (OSTI)

Supercritical Burning of Liquid Oxygen (LOX) Droplet with Detailed Chemistry J. DAOU,* P with diameter less than I pm vaporize before burning. A quasi-steady-like diffusion flame is then established is considered; temperature and pressure in the combustion chamber have a weak influence on the burning time

Heil, Matthias

249

Burning of high Tc bridges M. E. Gaevski,a)  

E-Print Network (OSTI)

Burning of high Tc bridges M. E. Gaevski,a) T. H. Johansen, Yu. Galperin,a) and H. Bratsberg February 1997; accepted for publication 24 September 1997 Burning of superconducting thin film bridges containing extended defects magneto-optic investigation is sufficient to locate the incipient burning region

Johansen, Tom Henning

250

December 2010 HYDROLOGIC AND VEGETAL RESPONSES TO PRESCRIBED BURNING AND  

E-Print Network (OSTI)

December 2010 HYDROLOGIC AND VEGETAL RESPONSES TO PRESCRIBED BURNING AND HERBICIDAL TREATMENT@nmsu.edu #12;i HYDROLOGIC AND VEGETAL RESPONSES TO PRESCRIBED BURNING AND HERBICIDAL TREATMENT OF BROOM both burning and spraying with herbicide. However, the broom snakeweed was not eradicated, and numbers

Johnson, Eric E.

251

LAMINAR BURNING VELOCITY OF GASOLINES WITH ADDITION OF ETHANOL  

E-Print Network (OSTI)

1 LAMINAR BURNING VELOCITY OF GASOLINES WITH ADDITION OF ETHANOL P. Dirrenberger1 , P.A. Glaude*1 (2014) 162-169" DOI : 10.1016/j.fuel.2013.07.015 #12;2 LAMINAR BURNING VELOCITY OF GASOLINES, Sweden Abstract The adiabatic laminar burning velocities of a commercial gasoline and of a model fuel (n

252

Hot Bottom Burning in Asymptotic Giant Branch Stars  

E-Print Network (OSTI)

Hot Bottom Burning in Asymptotic Giant Branch Stars By J OHN C. LATTANZ I O 1 , CHERYL A. FROST 1 state of knowledge about the phenomenon of Hot Bottom Burning as seen in Asymptotic Giant Branch stars. This is illustrated with some results from new 6M fi stellar models. 1. Introduction and Motivation Hot Bottom Burning

Lattanzio, John

253

Burning Plasma Science Workshop Astrophysics and Laboratory Plasmas  

E-Print Network (OSTI)

Burning Plasma Science Workshop Astrophysics and Laboratory Plasmas Robert Rosner The University of Chicago Dec. 12, 2000 Austin, TX (http://flash.uchicago.edu) #12;Burning Plasma Science Workshop Austin ¥ Plasma conditions ¥ Overview of plasma physics issues for astrophysics ¥ Specific examples #12;Burning

254

Greyscale Photograph Geometry Informed by Dodging and Burning  

E-Print Network (OSTI)

Greyscale Photograph Geometry Informed by Dodging and Burning Carlos Phillips and Kaleem Siddiqi the same negative may vary in inten- sity values due, in part, to the liberal use of dodging and burning to linear dodging and burning. 1 Introduction Photographs are often used as test data in the computer vision

Siddiqi, Kaleem

255

Prescribed Burning in the Kings River Ecosystems Project Area: Lessons  

E-Print Network (OSTI)

Prescribed Burning in the Kings River Ecosystems Project Area: Lessons Learned1 David S. Mc burning was initiated in 1994 in two 32,000-acre watersheds in the Kings River District of the Sierra various effects of these fires. Approximately 11,900 acres of prescription burns were completed by the end

Standiford, Richard B.

256

Burning Plasma Physics -The Next Frontier Three Options  

E-Print Network (OSTI)

Burning Plasma Physics - The Next Frontier Three Options (same scale) ITER-FEATFIRE IGNITOR US in Magnetic Fusion · Burning Plasma Performance Considerations · Compact High Field Approach - General for strengthening the base fusion sciences program 2. Directs DOE to submit a plan for a U.S. Burning Plasma

257

CX-010285: Categorical Exclusion Determination | Department of...  

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

CX-010285: Categorical Exclusion Determination Advancing Low Temperature Combustion and Lean Burning Engines for Light-and Heavy-Duty Vehicles CX(s) Applied: A9, B3.6...

258

Alternative Fuels Data Center: Kentucky Laws and Incentives for...  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

a strategy to replace at least 50% of commonwealth motor fleet light-duty vehicles with energy-efficient vehicles including hybrid electric, advanced lean burn, fuel cell, and...

259

B. Gonalves, Workshop on "Burning Plasma" Physics and Simulation Tarragona, 3-4 July, 2005 Burning Plasma Diagnostics on JET  

E-Print Network (OSTI)

B. Gonçalves, Workshop on "Burning Plasma" Physics and Simulation Tarragona, 3-4 July, 2005 Burning;B. Gonçalves, Workshop on "Burning Plasma" Physics and Simulation Tarragona, 3-4 July, 2005 on "Burning Plasma" Physics and Simulation Tarragona, 3-4 July, 2005 3.5 MeV n 14 MeV DT 3.5 MeV n 14 MeV DT

260

Role of Fusion Product Measurements in Physics Understanding of a Burning Plasma (A25955)  

E-Print Network (OSTI)

Proc. Of Int. Workshop On Burning Plasma Diagnostics, Varenna, Italy, 2007International Workshop on Burning Plasma Diagnostics Varenna, IT, 2007999614195

Boivin, R.L.

2007-10-17T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Experiments for the Measurement of LNG Mass Burning Rates  

E-Print Network (OSTI)

Liquefied Natural Gas (LNG) is a commonly used flammable fuel that has safety concerns associated with vapor dispersion and radiation emitted from pool fires. The main objective of this effort is to advance the knowledge of pool fires and to expand the data that is commonly used to validate semi-empirical models. This includes evaluation of the methods that are utilized to obtain experimental values of mass burning rates, which are used in models where semi-empirical correlations cannot be applied. A total of three small-size experiments designed to study the radiative characteristics of LNG pool fires were carried out at Texas A & M University's Brayton Fire Training Field (BFTF). This set of experiments was designed to study how the heat feedback from the fire to the pool surface is subsequently distributed through the liquid volume and the validity of different methods for measuring burning rates. In this work, a number of semi-empirical correlations were used to predict the characteristics of the flame and examine the predictive accuracy of these correlations when compared to the values obtained experimentally. In addition, the heat transferred from the energy received at the pool's surface to the surroundings was investigated. Finally, the parameters that influenced the measurement of radiative head feedback to the liquid pool were analyzed to investigate potential causes of calibration drift in the instrumentation. The results of this work provided information regarding the validity of certain techniques for the measurement of mass burning rates and the use of correlations to predict the characteristics of an LNG pool fire on a small-scale. The findings from this work indicate that the energy received at the liquid surface was used entirely for evaporation and no indications of transmission to the surroundings were observed. Lastly, it was found that during the experiments, the sink temperature of the sensor was not constant, and therefore, the readings of the radiative heat were unreliable. This was due to the insufficient cooling effect of the water circulated. It was later shown in the laboratory that through a series of qualitative tests, a change of 20°C in the cooling water resulted in a calibration drift.

Herrera Gomez, Lady Carolina

2011-05-01T23:59:59.000Z

262

An Interactive Simulation Framework for Burning Objects  

E-Print Network (OSTI)

We present a simulation framework to integrate several aspects of the combustion and burning process in a unified and modular manner. A simple three gas flame model is used to simulate a combustion process, while air motion is simulated as a single moving fluid. Solid objects inside the simulation domain can catch fire and start burning. Heat information is transferred from the fluid simulator to a solid simulator, while the solid simulator injects fuel into the fluid simulation. We also present a simple yet effective method for modeling of object decomposition under combustion using level set methods. The interaction between modules is presented as well as a discussion of fluid-solid coupling. All simulation modules run together at interactive rates, enabling the user to tweak the simulation parameters and setup for desired behavior 1. 1

Zeki Melek; John Keyser

2005-01-01T23:59:59.000Z

263

Operation Redwing. Project 4. 1. Chorioretinal burns  

SciTech Connect

This Redwing project was designed to furnish supplemental information on the requirements for protection against retinal burns, using both rabbits and monkeys as experimental animals. Chorioretinal burns were produced by various segments of the thermal pulse. This was accomplished by two series of time-fractionating shutters. The first group, the early closing shutters, were open at time zero and closed at increasing intervals of time. The second series, the delayed-opening shutters, were closed at time zero and subsequently opened for preselected time increments during the flash. The feasibility of protection by fixed-density optical filters was explored. Two types of protective electronic shutters were field tested. Additional objectives were to: (1) determine whether blink reflexes would prevent chorioretinal burns; (2) ascertain which portions of the time-intensity pulse can produce thermal injury to the retina and choroid of the eye; (3) determine the time required for blink reflex in rabbits and monkeys exposed to the extreme light intensity of the nuclear detonations; (4) explore the feasibility of ocular protection by means of fixed-density optical filters or combinations of filters; and (5) tests, under field conditions, protective shutter devices that are in the developmental state and are designed to close more rapidly than the blink reflex.

Fixott, R.; Pickering, J.E.; Williams, D.B.; Brown, D.V.L.; Rose, H.W.

1985-09-01T23:59:59.000Z

264

U.S. BURNING PLASMA ORGANIZATION ACTIVITIES  

Science Conference Proceedings (OSTI)

The national U.S. Burning Plasma Organization (USBPO) was formed to provide an umbrella structure in the U.S. fusion science research community. Its main purpose is the coordination of research activities in the U.S. program relevant to burning plasma science and preparations for participation in the international ITER experiment. This grant provided support for the continuing development and operations of the USBPO in its first years of existence. A central feature of the USBPO is the requirement for broad community participation in and governance of this effort. We concentrated on five central areas of activity of the USBPO during this grant period. These included: 1) activities of the Director and support staff in continuing management and development of the USBPO activity; 2) activation of the advisory Council; 3) formation and initial research activities of the research community Topical Groups; 4) formation of Task Groups to perform specific burning plasma related research and development activities; 5) integration of the USBPO community with the ITER Project Office as needed to support ITER development in the U.S.

Raymond J. Fonck

2009-08-11T23:59:59.000Z

265

BIOMASS BURNING IN THE AMAZON: LINKS BETWEEN BURNING, SCIAMACHY TRACE GASES, AND AEROSOL AND SURFACE PROPERTIES FROM THE ORAC-AATSR RETRIEVAL  

E-Print Network (OSTI)

BIOMASS BURNING IN THE AMAZON: LINKS BETWEEN BURNING, SCIAMACHY TRACE GASES, AND AEROSOL@atm.ox.ac.uk AEROSOL AND GAS PROPERTIESSEASONALITY OF BURNING Biomass burning in the Amazon shows strong seasonal counts are generally highest up to 3 months after the burning of ground. ACKNOWLEDGEMENTS ESA

266

Plasma-wall interaction data needs critical to a Burning Core Experiment (BCX)  

Science Conference Proceedings (OSTI)

The Division of Development and Technology has sponsored a four day US-Japan workshop ''Plasma-Wall Interaction Data Needs Critical to a Burning Core Experiment (BCX)'', held at Sandia National Laboratories, Livermore, California on June 24 to 27, 1985. The workshop, which brought together fifty scientists and engineers from the United States, Japan, Germany, and Canada, considered the plasma-material interaction and high heat flux (PMI/HHF) issues for the next generation of magnetic fusion energy devices, the Burning Core Experiment (BCX). Materials options were ranked, and a strategy for future PMI/HHF research was formulated. The foundation for international collaboration and coordination of this research was also established. This volume contains the last three of the five technical sessions. The first of the three is on plasma materials interaction issues, the second is on research facilities and the third is from smaller working group meetings on graphite, beryllium, advanced materials and future collaborations.

Not Available

1985-11-01T23:59:59.000Z

267

Interim Status Closure Plan Open Burning Treatment Unit Technical Area 16-399 Burn Tray  

SciTech Connect

This closure plan describes the activities necessary to close one of the interim status hazardous waste open burning treatment units at Technical Area (TA) 16 at the Los Alamos National Laboratory (LANL or the Facility), hereinafter referred to as the 'TA-16-399 Burn Tray' or 'the unit'. The information provided in this closure plan addresses the closure requirements specified in the Code of Federal Regulations (CFR), Title 40, Part 265, Subparts G and P for the thermal treatment units operated at the Facility under the Resource Conservation and Recovery Act (RCRA) and the New Mexico Hazardous Waste Act. Closure of the open burning treatment unit will be completed in accordance with Section 4.1 of this closure plan.

Vigil-Holterman, Luciana R. [Los Alamos National Laboratory

2012-05-07T23:59:59.000Z

268

The Soret Effect in Naturally Propagating, Premixed, Lean, Hydrogen-Air Flames  

SciTech Connect

Comparatively little attention has been given to multicomponent diffusion effects in lean hydrogen-air flames, in spite of the importance of these flames in safety and their potential importance to future energy technologies. Prior direct numerical simulations either have considered only the mixture-averaged transport model, or have been limited to stabilized flames that do not exhibit the thermo-diffusive instability. The so-called full, multicomponent transport model with cross-diffusion is found to predict hotter, significantly faster flames with much faster extinction and division of cellular structures.

Grcar, Joseph F; Grcar, Joseph F.; Bell, John B.; Day, Marcus S.

2008-06-30T23:59:59.000Z

269

Neutrino-Accelerated Hot Hydrogen Burning  

E-Print Network (OSTI)

We examine the effects of significant electron anti-neutrino fluxes on hydrogen burning. Specifically, we find that the bottleneck weak nuclear reactions in the traditional pp-chain and the hot CNO cycle can be accelerated by anti-neutrino capture, increasing the energy generation rate. We also discuss how anti-neutrino capture reactions can alter the conditions for break out into the rp-process. We speculate on the impact of these considerations for the evolution and dynamics of collapsing very- and super- massive compact objects.

Chad T. Kishimoto; George M. Fuller

2006-06-23T23:59:59.000Z

270

Advanced PFBC transient analysis  

SciTech Connect

Transient modeling and analysis of advanced Pressurized Fluidized Bed Combustion (PFBC) systems is a research area that is currently under investigation by the US Department of Energy`s Federal Energy Technology Center (FETC). The object of the effort is to identify key operating parameters that affect plant performance and then quantify the basic response of major sub-systems to changes in operating conditions. PC-TRAX{trademark}, a commercially available dynamic software program, was chosen and applied in this modeling and analysis effort. This paper describes the development of a series of TRAX-based transient models of advanced PFBC power plants. These power plants burn coal or other suitable fuel in a PFBC, and the high temperature flue gas supports low-Btu fuel gas or natural gas combustion in a gas turbine topping combustor. When it is utilized, the low-Btu fuel gas is produced in a bubbling bed carbonizer. High temperature, high pressure combustion products exiting the topping combustor are expanded in a modified gas turbine to generate electrical power. Waste heat from the system is used to raise and superheat steam for a reheat steam turbine bottoming cycle that generates additional electrical power. Basic control/instrumentation models were developed and modeled in PC-TRAX and used to investigate off-design plant performance. System performance for various transient conditions and control philosophies was studied.

White, J.S. [Parsons Power Group, Inc., Reading, PA (United States); Bonk, D.L. [USDOE Federal Energy Technology Center, Morgantown, WV (United States)

1997-05-01T23:59:59.000Z

271

Advanced PFBC transient analysis  

SciTech Connect

Transient modeling and analysis of Advanced Pressurized Fluidized Bed Combustion (PFBC) systems is a research area that is currently under investigative study by the United States Department of Energy`s Morgantown Energy Technology Center (METC). The object of the effort is to identify key operating parameters affecting plant performance and then quantify the basic response of major sub-systems to changes in operating conditions. PC-TRAX, a commercially available dynamic software program, was chosen and applied in this modeling and analysis effort. This paper summarizes and describes the development of a series of TRAX-based transient models of Advanced PFBC power plants. These power plants generate a high temperature flue gas by burning coal or other suitable fuel in a PFBC. The high temperature flue gas supports low-Btu fuel gas or natural gas combustion in a gas turbine topping combustor. When utilized, low-Btu fuel gas is produced in a bubbling bed carbonizer. High temperature, high pressure combustion products exiting the topping combustor are expanded in a modified gas turbine to generate electrical power. Waste heat from the system is used to generate and superheat steam for a reheat steam turbine bottoming cycle that generates additional electrical power. Basic control/instrumentation models were developed and modeled in PC-TRAX and used to investigate off-design plant performance. System performance for various transient conditions and control philosophies was studied.

White, J.S. [Parsons Power Group, Inc., Reading, PA (United States); Bonk, D.L.; Rogers, L. [USDOE Morgantown Energy Technology Center, WV (United States)

1996-12-31T23:59:59.000Z

272

A New Type of Steady and Stable, Laminar, Premixed Flame in Ultra-Lean, Hydrogen-Air Combustion  

Science Conference Proceedings (OSTI)

Ultra-lean, hydrogen-air mixtures are found to support another kind of laminar flame that is steady and stable beside flat flames and flame balls. Direct numerical simulations are performed of flames that develop into steadily and stably propagating cells. These cells were the original meaning of the word"flamelet'' when they were observed in lean flammability studies conducted early in the development of combustion science. Several aspects of these two-dimensional flame cells are identified and are contrasted with the properties of one-dimensional flame balls and flat flames. Although lean hydrogen-air flames are subject to thermo-diffusive effects, in this case the result is to stabilize the flame rather than to render it unstable. The flame cells may be useful as basic components of engineering models for premixed combustion when the other types of idealized flames are inapplicable.

Grcar, Joseph F; Grcar, Joseph F

2008-06-30T23:59:59.000Z

273

Advanced Gasification  

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

Advanced Gasification Carbon feedstock gasification is a promising pathway for high-efficiency, low-pollutant power generation and chemical production. The inability, however, to...

274

Advanced Ceramics  

Science Conference Proceedings (OSTI)

Table 3   Raw materials for advanced structural and magnetic (ferrite) ceramics...conductivity Wear resistance Oxygen sensors, fuel cells (potential), high-temperature

275

Advanced Manufacturing  

Science Conference Proceedings (OSTI)

... new metrologically-based methods for industry as well ... for Advanced Catalyst Development and Durability ... Electron-Beam Irradiation of Solar Cells. ...

2013-07-29T23:59:59.000Z

276

'Live Burns' in Spartanburg, SC, Will Benefit Research and ...  

Science Conference Proceedings (OSTI)

... in Spartanburg, SC, battle a 'test burn' of an abandoned house in an ... organizations will turn abandoned wood-frame, single-family houses near ...

2013-02-05T23:59:59.000Z

277

Burns Harbor, Indiana: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

with form History Share this page on Facebook icon Twitter icon Burns Harbor, Indiana: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates...

278

C. Langton1, D. Kosson2 and H. Burns1  

G. Flach, R. Seitz, S. Marra, H. Burns, SRNL DOE-EM Project Manager: Pramod Mallick CBP Project Support Provided by EM-30 Contact Information

279

Biomass burning : particle emissions, characteristics, and airborne measurements.  

E-Print Network (OSTI)

??Biomass burning started to attract attention since the last decade because of its impacts on the atmosphere and the environmental air quality, as well as… (more)

Wardoyo, Arinto Yudi

2007-01-01T23:59:59.000Z

280

Burning Man: Transforming Community through Countercultural Ritual Process.  

E-Print Network (OSTI)

??This thesis will examine the countercultural event called Burning Man through the lens of the ritual process. Through the personal narratives of six main collaborators… (more)

McCaffrey, Jessica

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Reflective Terahertz Imaging for early diagnosis of skin burn severity  

E-Print Network (OSTI)

of injuries caused by flame/flash burns[23, 24]. OtherDeep partial IIb° Deep III° Flame, chemical, electrical, hotliquids with high viscosity Flame, electrical, chemical,

TEWARI, PRIYAMVADA

2013-01-01T23:59:59.000Z

282

Mechanistic Reactive Burn Modeling of Solid Explosives  

SciTech Connect

This report describes a computational framework for reactive burn modeling of solid explosives and the development of a test case where physical mechanisms represent RDX or RDX-based materials. The report is a sequel to LA-13794-MS, ''A Unifying Framework for Hot Spots and the Ignition of Energetic Materials,'' where we proposed a new approach to the building of a general purpose model that captures the essential features of the three primary origins of hot-spot formation: void collapse, shear banding, friction. The purpose of the present report is to describe the continuing task of coupling the unifying hot-spot model to hydrodynamic calculations to develop a mechanistic reactive burn model. The key components of the coupling include energy localization, the growth of hot spots, overall hot-spot behavior, and a phase-averaged mixture equation of state (EOS) in a Mie-Grueneisen form. The nucleation and growth of locally heated regions is modeled by a phenomenological treatment as well as a statistical model based on an exponential size distribution. The Mie-Grueneisen form of the EOS is one of many possible choices and is not a critical selection for implementing the model. In this report, model calculations are limited to proof-of-concept illustrations for shock loading. Results include (1) shock ignition and growth-to-detonation, (2) double shock ignition, and (3) quenching and reignition. A comparative study of Pop-plots is discussed based on the statistical model.

Y.Horie; Y.Hamate; D.Greening

2003-04-01T23:59:59.000Z

283

Modeling Deep Burn TRISO Particle Nuclear Fuel  

Science Conference Proceedings (OSTI)

Under the DOE Deep Burn program TRISO fuel is being investigated as a fuel form for consuming plutonium and minor actinides, and for greater efficiency in uranium utilization. The result will thus be to drive TRISO particulate fuel to very high burn-ups. In the current effort the various phenomena in the TRISO particle are being modeled using a variety of techniques. The chemical behavior is being treated utilizing thermochemical analysis to identify phase formation/transformation and chemical activities in the particle, including kernel migration. First principles calculations are being used to investigate the critical issue of fission product palladium attack on the SiC coating layer. Density functional theory is being used to understand fission product diffusion within the plutonia oxide kernel. Kinetic Monte Carlo techniques are shedding light on transport of fission products, most notably silver, through the carbon and SiC coating layers. The diffusion of fission products through an alternative coating layer, ZrC, is being assessed via DFT methods. Finally, a multiscale approach is being used to understand thermal transport, including the effect of radiation damage induced defects, in a model SiC material.

Besmann, Theodore M [ORNL; Stoller, Roger E [ORNL; Samolyuk, German D [ORNL; Schuck, Paul C [ORNL; Rudin, Sven [Los Alamos National Laboratory (LANL); Wills, John [Los Alamos National Laboratory (LANL); Wirth, Brian D. [University of California, Berkeley; Kim, Sungtae [University of Wisconsin, Madison; Morgan, Dane [University of Wisconsin, Madison; Szlufarska, Izabela [University of Wisconsin, Madison

2012-01-01T23:59:59.000Z

284

Impact of biomass burning on the atmosphere  

DOE Green Energy (OSTI)

Fire has played an important part in biogeochemical cycling throughout most of the history of our planet. Ice core studies have been very beneficial in paleoclimate studies and constraining the budgets of biogeochemical cycles through the past 160,000 years of the Vostok ice core. Although to date there has been no way of determining cause and effect, concentration of greenhouse gases directly correlates with temperature in ice core analyses. Recent ice core studies on Greenland have shown that significant climate change can be very rapid on the order of a decade. This chapter addresses the coupled evolution of our planet`s atmospheric composition and biomass burning. Special attention is paid to the chemical and climatic impacts of biomass burning on the atmosphere throughout the last century, specifically looking at the cycles of carbon, nitrogen, and sulfur. Information from ice core measurements may be useful in understanding the history of fire and its historic affect on the composition of the atmosphere and climate.

Dignon, J.

1993-03-01T23:59:59.000Z

285

On the burning behavior of pulverized coal chars  

SciTech Connect

A model that predicts the physical changes that pulverized coal char particles undergo during combustion has been developed. In the model, a burning particle is divided into a number of concentric annular volume elements. The mass loss rate, specific surface area, and apparent density in each volume element depend upon the local particle conditions, which vary as a consequence of the adsorbed oxygen and gas-phase oxygen concentration gradients inside the particle. The model predicts the particle's burning rate, temperature, diameter, apparent density, and specific surface area as combustion proceeds, given ambient conditions and initial char properties. A six-step heterogeneous reaction mechanism is used to describe carbon reactivity to oxygen. A distributed activation energy approach is used to account for the variation in desorption energies of adsorbed O-atoms on the carbonaceous surface. Model calculations support the three burning zones established for the oxidation of pulverized coal chars. The model indicates two types of zone II behavior, however. Under weak zone II burning conditions, constant-diameter burning occurs up to 30% to 50% conversion before burning commences with reductions in both size and apparent density. Under strong zone II conditions, particles burn with reductions in both size and apparent density after an initial short period (conversion) of constant-diameter burning. Model predictions reveal that early in the oxidation process, there is mass loss at constant diameter under all zone II burning conditions. Such weak and strong burning behavior cannot be predicted with the commonly used power-law model for the mode of burning employing a single value for the burning mode parameter. Model calculations also reveal how specific surface area evolves when oxidation occurs in the zone II burning regime. Based on the calculated results, a surface area submodel that accounts for the effects of pore growth and coalescence during combustion under zone I conditions was modified to permit the characterization of the variations in specific surface area that occur during char conversion under zones II conditions. The modified surface area model is applicable to all burning regimes. Calculations also indicate that the particle's effectiveness factor varies during conversion under zone II burning conditions. With the adsorption/desorption mechanism employed, a near first-order Thiele modulus-effectiveness factor relationship is obeyed over the particle's lifetime. (author)

Mitchell, Reginald E.; Ma, Liqiang; Kim, BumJick [Thermosciences Group, Mechanical Engineering Department, Stanford University, Stanford, CA 94305-3032 (United States)

2007-11-15T23:59:59.000Z

286

Issues in "Burning Plasma Science" S. J. Zweben, D. S. Darrow  

E-Print Network (OSTI)

Issues in "Burning Plasma Science" S. J. Zweben, D. S. Darrow (with inputs from many people at PPPL) Burning Plasma Science Workshop Austin, Texas 12/11/00 · Burning plasma physics issues · Fusion energy development issues => big issue: local burn control in an AT · Our conclusions · Alternate path #12;Burning

287

Laboratory-Scale Burning and Characterizing of Composite Solid Propellant for Studying Novel Nanoparticle Synthesis Methods  

E-Print Network (OSTI)

This thesis examines the effects of nanoparticle, metal-oxide additives on the burning rate of composite solid propellants. Recent advancements in chemical synthesis techniques have allowed for the production of improved solid rocket propellant nano-scale additives. These additives show larger burning rate increases in composite propellants compared to previous additive generations. In addition to improving additive effectiveness, novel synthesis methods can improve manufacturability, reduce safety risks, and maximize energy efficiency of nano-scale burning rate enhancers. Several different nano-sized additives, each titania-based, were tested and compared for the same baseline AP/HTPB formulas and AP size distributions. The various methods demonstrate the evolution in our methods from spray-dried powders to pre-mixing the additive in the HTPB binder, and finally to a method of producing the additive directly in the binder as a nano-assembly. Burning rate increases as high as 80% at additive mass loadings of less than 0.5% were seen in non-aluminized, ammonium perchlorate-based propellants over the pressure spectrum of 500 psi (3.5 MPa) to 2250 psi (15.5 MPa). Increases in burning rate up to 73% were seen in similarly formulated aluminized propellants. During the past several years, the research team has refined laboratory-scale techniques for quickly and reliably assessing the mixing and performance of composite propellants with catalytic nanoparticle additives. This thesis also documents some of the details related to repeatability, accuracy, and realism of the methods used in the team’s recent nano-additive research; it also introduces the latest techniques for producing propellants with nano-sized additives and provides new burning rate results for the entire scope of additives and mixing methods. Details on the propellant characterization methods with regard to physical and combustion properties are provided. Snapshots from atmospheric propellant combustion videos taken with a Photron FASTCAM SA3 high-speed camera are included along with existing pressure and light-emission responses.

Allen, Tyler Winston

2013-05-01T23:59:59.000Z

288

Advanced NOx Emissions Control: Control Technology - Second Generation  

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

Second Generation Advanced Reburning Second Generation Advanced Reburning General Electric - Energy and Environmental Research Corporation (GE-EER) is carrying out a two Phase research program to develop novel Advanced Reburning (AR) concepts for high efficiency and low cost NOx control from coal-fired utility boilers. AR technologies are based on combination of basic reburning and N-agent/promoter injections. Phase I of the project was successfully completed and EER was selected to continue to develop AR technology during Phase II. Phase I demonstrated that AR technologies are able to provide effective NOx control for coal-fired combustors. Three technologies were originally envisioned for development: AR-Lean, AR-Rich, and Multiple Injection AR (MIAR). Along with these, three additional technologies were identified during the project: reburning plus promoted SNCR; AR-Lean plus promoted SNCR; and AR-Rich plus promoted SNCR. The promoters are sodium salts, in particular sodium carbonate. These AR technologies have different optimum reburn heat input levels and furnace temperature requirements. For full scale application, an optimum technology can be selected on a boiler-specific basis depending on furnace temperature profile and regions of injector access.

289

Tropical biomass burning smoke plume size, shape, reflectance, and age based on 2001â??2009 MISR imagery of Borneo  

E-Print Network (OSTI)

C. S. Zender et al. : Tropical biomass burning smoke plumeslaboratory measurements of biomass-burning emis- sions: 1.aerosol optical depth biomass burning events: a comparison

Zender, C. S.; Krolewski, A. G.; Tosca, M. G.; Randerson, J. T.

2012-01-01T23:59:59.000Z

290

PHOTOCHEMICAL AND NON-PHOTOCHEMICAL HOLE BURNING IN DIMETHYL-S-TETRAZINE IN A POLYVINYL CARBAZOLE FILM  

E-Print Network (OSTI)

AND NON-PHOTOCHEMICAL HOLE BURNING IN DIMETHYL-S-TETRAZINE~ CA 95193 ABSTRACT Hole burning as well as uorescence lineamorphous organic hosts. burning. Evidence is presented for

Cuellar, E.

2013-01-01T23:59:59.000Z

291

Study of composite cement containing burned oil shale  

E-Print Network (OSTI)

Study of composite cement containing burned oil shale Julien Ston Supervisors : Prof. Karen properties. SCMs can be by-products from various industries or of natural origin, such as shale. Oil shale correctly, give a material with some cementitious properties known as burned oil shale (BOS). This study

Dalang, Robert C.

292

Classification of burn degrees in grinding by neural nets  

Science Conference Proceedings (OSTI)

One of the problems found in the implementation of intelligent grinding process is the automatic detection of surface burn of the parts. Several systems of monitoring have been assessed by researchers in order to control the grinding process and guarantee ... Keywords: acoustic emission, burn, grinding, monitoring, neural network

Marcelo M. Spadotto; Paulo R. Aguiar; Carlos C. P. Souza; Eduardo C. Bianchi; André N. de Souza

2008-02-01T23:59:59.000Z

293

Optimal Mechansim Design and Money Burning  

E-Print Network (OSTI)

Mechanism design is now a standard tool in computer science for aligning the incentives of self-interested agents with the objectives of a system designer. There is, however, a fundamental disconnect between the traditional application domains of mechanism design (such as auctions) and those arising in computer science (such as networks): while monetary transfers (i.e., payments) are essential for most of the known positive results in mechanism design, they are undesirable or even technologically infeasible in many computer systems. Classical impossibility results imply that the reach of mechanisms without transfers is severely limited. Computer systems typically do have the ability to reduce service quality--routing systems can drop or delay traffic, scheduling protocols can delay the release of jobs, and computational payment schemes can require computational payments from users (e.g., in spam-fighting systems). Service degradation is tantamount to requiring that users burn money}, and such ``payments'' can...

Hartline, Jason D

2008-01-01T23:59:59.000Z

294

Microsoft PowerPoint - burns.ppt  

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

Evaluation of Low Evaluation of Low Tank Level Mixing Technologies for DOE High Level Waste Tank Retrieval (10516) Heather Burns Andrew Fellinger and Richard Minichan Savannah River National Laboratory March 7 - 11, 2010 Phoenix, Arizona Waste Management Symposia 2010 SRNL-STI-2010-00139 2 W A S T E M A N A G E M E N T S Y M P O S I A 2 0 1 0 Agenda Overview Background Why a retrieval knowledge center Initial objectives / goals Low Level Mixing Addressing a challenge through technology demonstration Evaluation criteria Instrumentation Test matrix HOW DID WE GET THERE? WHERE DID WE GO? "Building a Foundation" The challenges that lead to gaps in retrieval Development and mock-up of retrieval technologies 3 W A S T E M A N A G E M E N T S Y M P O S I A 2 0 1 0 Background -

295

Wood Burning Combined Cycle Power Plant  

E-Print Network (OSTI)

A combined cycle power plant utilizing wood waste products as a fuel has been designed. This plant will yield a 50% efficiency improvement compared to conventional wood-fueled steam power plants. The power plant features an externally-fired gas turbine combined cycle system that obtains its heat input from a high temperature, high pressure ceramic air heater burning wood waste products as a fuel. This paper presents the results of the design study including the cycle evaluation and a description of the major components of the power plant. The cycle configuration is based on maximum fuel efficiency with minimum capital equipment risk. The cycle discussion includes design point performance of the power plant. The design represents a significant step forward in wood-fueled power plants.

Culley, J. W.; Bourgeois, H. S.

1984-01-01T23:59:59.000Z

296

Advanced Materials  

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

Advanced Materials Advanced Materials Advanced Materials Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And Membrane Express Licensing Analysis Of Macromolecule, Liggands And Macromolecule-Lingand Complexes Express Licensing Carbon Microtubes Express Licensing Chemical Synthesis Of Chiral Conducting Polymers Express Licensing Forming Adherent Coatings Using Plasma Processing Express Licensing Hydrogen Scavengers Express Licensing Laser Welding Of Fused Quartz Express Licensing Multiple Feed Powder Splitter Negotiable Licensing Boron-10 Neutron Detectors for Helium-3 Replacement Negotiable Licensing Insensitive Extrudable Explosive Negotiable Licensing Durable Fuel Cell Membrane Electrode Assembly (MEA) Express Licensing Method of Synthesis of Proton Conducting Materials

297

The role of actinide burning and the Integral Fast Reactor in the future of nuclear power  

Science Conference Proceedings (OSTI)

A preliminary assessment is made of the potential role of actinide burning and the Integral Fast Reactor (IFR) in the future of nuclear power. The development of a usable actinide burning strategy could be an important factor in the acceptance and implementation of a next generation of nuclear power. First, the need for nuclear generating capacity is established through the analysis of energy and electricity demand forecasting models which cover the spectrum of bias from anti-nuclear to pro-nuclear. The analyses take into account the issues of global warming and the potential for technological advances in energy efficiency. We conclude, as do many others, that there will almost certainly be a need for substantial nuclear power capacity in the 2000--2030 time frame. We point out also that any reprocessing scheme will open up proliferation-related questions which can only be assessed in very specific contexts. The focus of this report is on the fuel cycle impacts of actinide burning. Scenarios are developed for the deployment of future nuclear generating capacity which exploit the advantages of actinide partitioning and actinide burning. Three alternative reactor designs are utilized in these future scenarios: The Light Water Reactor (LWR); the Modular Gas-Cooled Reactor (MGR); and the Integral Fast Reactor (FR). Each of these alternative reactor designs is described in some detail, with specific emphasis on their spent fuel streams and the back-end of the nuclear fuel cycle. Four separation and partitioning processes are utilized in building the future nuclear power scenarios: Thermal reactor spent fuel preprocessing to reduce the ceramic oxide spent fuel to metallic form, the conventional PUREX process, the TRUEX process, and pyrometallurgical reprocessing.

Hollaway, W.R.; Lidsky, L.M.; Miller, M.M.

1990-12-01T23:59:59.000Z

298

Pre-burning wxperiments commence in August 2008. A controlled burning takes place late September 2008 and field observations continues untill at least  

E-Print Network (OSTI)

Pre-burning wxperiments commence in August 2008. A controlled burning takes place late September) and long-term (months to a years) effects of fires (burning) in macchia ecosystem on [i] soil emissions ecosystems, land use and land use change scenarios. October 29-30, 2007, Barcelona, Spain Effect of burning

299

NETL: Mercury Emissions Control Technologies - Advanced Utility  

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

Advanced Utility Mercury-Sorbent Field Testing Program Advanced Utility Mercury-Sorbent Field Testing Program Sorbent Technologies Corporation, will test an advanced halgenated activated carbon to determine the mercury removal performance and relative costs of sorbent injection for advanced sorbent materials in large-scale field trials of a variety of combinations of coal-type and utility plant-configuration. These include one site (Detroit Edison's St. Clair Station) with a cold-side ESP using subbituminous coal, or blend of subbituminous and bituminous coal, and one site (Duke Energy's Buck Plant) with a hot-side ESP which burns a bituminous coal. Related Papers and Publications: Semi-Annual Technical Progress Report for the period April 1 - October 31, 2004 [PDF-2275KB] Semi-Annual Technical Progress Report for the period of October 2003 - March 2004 [PDF-1108KB]

300

A New Type of Steady and Stable, Laminar, Premixed Flame in Ultra-Lean, Hydrogen-Air Combustion  

E-Print Network (OSTI)

A New Type of Steady and Stable, Laminar, Premixed Flame in Ultra-Lean, Hydrogen-Air Combustion in the development of combustion science. Several aspects of these two-dimensional flame cells are identified for premixed combustion when the other types of idealized flames are inapplicable. 1 #12;Nomenclature fuel

Geddes, Cameron Guy Robinson

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


301

Method and apparatus to measure the depth of skin burns  

DOE Patents (OSTI)

A new device for measuring the depth of surface tissue burns based on the rate at which the skin temperature responds to a sudden differential temperature stimulus. This technique can be performed without physical contact with the burned tissue. In one implementation, time-dependent surface temperature data is taken from subsequent frames of a video signal from an infrared-sensitive video camera. When a thermal transient is created, e.g., by turning off a heat lamp directed at the skin surface, the following time-dependent surface temperature data can be used to determine the skin burn depth. Imaging and non-imaging versions of this device can be implemented, thereby enabling laboratory-quality skin burn depth imagers for hospitals as well as hand-held skin burn depth sensors the size of a small pocket flashlight for field use and triage.

Dickey, Fred M. (Albuquerque, NM); Holswade, Scott C. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

302

Turbulent burning rates of methane and methane-hydrogen mixtures  

Science Conference Proceedings (OSTI)

Methane and methane-hydrogen (10%, 20% and 50% hydrogen by volume) mixtures have been ignited in a fan stirred bomb in turbulence and filmed using high speed cine schlieren imaging. Measurements were performed at 0.1 MPa (absolute) and 360 K. A turbulent burning velocity was determined for a range of turbulence velocities and equivalence ratios. Experimental laminar burning velocities and Markstein numbers were also derived. For all fuels the turbulent burning velocity increased with turbulence velocity. The addition of hydrogen generally resulted in increased turbulent and laminar burning velocity and decreased Markstein number. Those flames that were less sensitive to stretch (lower Markstein number) burned faster under turbulent conditions, especially as the turbulence levels were increased, compared to stretch-sensitive (high Markstein number) flames. (author)

Fairweather, M. [School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9JT (United Kingdom); Ormsby, M.P.; Sheppard, C.G.W. [School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT (United Kingdom); Woolley, R. [Department of Mechanical Engineering, University of Sheffield, Sheffield S1 3JD (United Kingdom)

2009-04-15T23:59:59.000Z

303

Advanced Ceramics  

Science Conference Proceedings (OSTI)

Table 2   Classification of advanced ceramics...solid electrolytes, piezoelectrics, dielectrics, superconductors Optical Low absorption coefficient Lamps, windows, fiber optics, infrared optics Nuclear Irradiation resistance, high absorption coefficient,

304

Local Burn-Up Effects in the NBSR Fuel Element  

SciTech Connect

This study addresses the over-prediction of local power when the burn-up distribution in each half-element of the NBSR is assumed to be uniform. A single-element model was utilized to quantify the impact of axial and plate-wise burn-up on the power distribution within the NBSR fuel elements for both high-enriched uranium (HEU) and low-enriched uranium (LEU) fuel. To validate this approach, key parameters in the single-element model were compared to parameters from an equilibrium core model, including neutron energy spectrum, power distribution, and integral U-235 vector. The power distribution changes significantly when incorporating local burn-up effects and has lower power peaking relative to the uniform burn-up case. In the uniform burn-up case, the axial relative power peaking is over-predicted by as much as 59% in the HEU single-element and 46% in the LEU single-element with uniform burn-up. In the uniform burn-up case, the plate-wise power peaking is over-predicted by as much as 23% in the HEU single-element and 18% in the LEU single-element. The degree of over-prediction increases as a function of burn-up cycle, with the greatest over-prediction at the end of Cycle 8. The thermal flux peak is always in the mid-plane gap; this causes the local cumulative burn-up near the mid-plane gap to be significantly higher than the fuel element average. Uniform burn-up distribution throughout a half-element also causes a bias in fuel element reactivity worth, due primarily to the neutronic importance of the fissile inventory in the mid-plane gap region.

Brown N. R.; Hanson A.; Diamond, D.

2013-01-31T23:59:59.000Z

305

Energy Department Announces $2.5 Million to Advance Technologies for  

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

2.5 Million to Advance Technologies 2.5 Million to Advance Technologies for Clean-Burning, Efficient Biomass Cookstoves Energy Department Announces $2.5 Million to Advance Technologies for Clean-Burning, Efficient Biomass Cookstoves April 13, 2012 - 10:39am Addthis WASHINGTON, DC - The Energy Department today announced up to $2.5 million available this year for applied research to advance clean biomass cookstove technologies for use in developing countries. The funding will support the development of innovative cookstove designs that allow users to burn wood or crop residues more efficiently and with less smoke than open fires and traditional stoves, helping to save lives and improve livelihoods. The Department of Energy, along with other federal agencies, is a founding partner of the Global Alliance for Clean Cookstoves, a public-private

306

Modeling and Control of Lean Premixed Combustion Dynamics for Gas Turbines  

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

Virginia Active Combustion Control Group Virginia Active Combustion Control Group Tech Virginia VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY Reacting Flows Laboratory Modeling and Control of Lean Premixed Combustion Dynamics for Gas Turbines Virginia Tech Principal Investigator: Uri Vandsburger SCIES Project 02- 01- SR099 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (05/01/02, 36 Month Duration) $ 756,700 Total Contract Value ($ 603,600 DOE) Virginia Active Combustion Control Group Tech Virginia VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY Reacting Flows Laboratory Gas Turbine Technology Needs DLN/LP Gas Turbines * Improved Combustion Stability * Improved Design Methodology With a focus on: - Thermoacoustics

307

Development of lean premixed low-swirl burner for low NO{sub x} practical application  

DOE Green Energy (OSTI)

Laboratory experiments have been performed to evaluate the performance of a premixed low-swirl burner (LSB) in configurations that simulate commercial heating appliances. Laser diagnostics were used to investigate changes in flame stabilization mechanism, flowfield, and flame stability when the LSB flame was confined within quartz cylinders of various diameters and end constrictions. The LSB adapted well to enclosures without generating flame oscillations and the stabilization mechanism remained unchanged. The feasibility of using the LSB as a low NO{sub x} commercial burner has also been verified in a laboratory test station that simulates the operation of a water heater. It was determined that the LSB can generate NO{sub x} emissions < 10 ppm (at 3% O{sub 2}) without significant effect on the thermal efficiency of the conventional system. The study has demonstrated that the lean premixed LSB has commercial potential for use as a simple economical and versatile burner for many low emission gas appliances.

Yegian, D.T.; Cheng, R.K.

1999-07-07T23:59:59.000Z

308

Catalytic igniters and their use to ignite lean hydrogen-air mixtures  

DOE Patents (OSTI)

This disclosure describes a catalytic igniter which can ignite a hydrogen-air mixture as lean as 5.5% hydrogen with induction times ranging from 20 s to 400 s, under conditions which may be present during a loss-of-liquid-coolant accident at a light water nuclear reactor. It is comprised of (1) a perforate catalytically active substrate, such as a platinum coated ceramic honeycomb or wire mesh screen, through which heated gases produced by oxidation of the mixture can freely flow and (2) a plurality of thin platinum wires mounted in a thermally conductive manner on the substrate and positioned thereon so as to be able to receive heat from the substrate and the heated gases while also in contact with unoxidized gases.

McLean, W.J.; Thorne, L.R.; Volponi, J.V.

1986-06-10T23:59:59.000Z

309

Simulation of catalytic oxidation and selective catalytic NOx reduction in lean-exhaust hybrid vehicles  

DOE Green Energy (OSTI)

We utilize physically-based models for diesel exhaust catalytic oxidation and urea-based selective catalytic NOx reduction to study their impact on drive cycle performance of hypothetical light-duty diesel powered hybrid vehicles. The models have been implemented as highly flexible SIMULINK block modules that can be used to study multiple engine-aftertreatment system configurations. The parameters of the NOx reduction model have been adjusted to reflect the characteristics of Cu-zeolite catalysts, which are of widespread current interest. We demonstrate application of these models using the Powertrain System Analysis Toolkit (PSAT) software for vehicle simulations, along with a previously published methodology that accounts for emissions and temperature transients in the engine exhaust. Our results illustrate the potential impact of DOC and SCR interactions for lean hybrid electric and plug-in hybrid electric vehicles.

Gao, Zhiming [ORNL; Daw, C Stuart [ORNL; Chakravarthy, Veerathu K [ORNL

2012-01-01T23:59:59.000Z

310

DIESEL REFORMERS FOR LEAN NOX TRAP REGENERATION AND OTHER ON-BOARD HYDROGEN APPLICATIONS  

DOE Green Energy (OSTI)

Many solutions to meeting the 2007 and 2010 diesel emissions requirements have been suggested. On board production of hydrogen for in-cylinder combustion and exhaust after-treatment provide promising opportunities for meeting those requirements. Other benefits may include using syngas to rapidly heat up exhaust after-treatment catalysts during engine startup. HydrogenSource's development of a catalytic partial oxidation reformer for generating hydrogen from ultra-low sulfur diesel fuel is presented. The system can operate on engine exhaust and diesel fuel with no water tank. Test data for hydrogen regeneration of a lean NOx trap is presented showing 90% NOx conversion at temperatures as low as 150 degrees C and 99% conversion at 300 degrees C. Finally, additional efforts required to fully understand the benefits and commercial challenges of this technology are discussed.

Mauss, M; Wnuck, W

2003-08-24T23:59:59.000Z

311

The Laboratory at 70: A proud history, leaning forward to shape the future  

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

Director's Column Director's Column Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit The Laboratory at 70: A proud history, leaning forward to shape the future Seventy years ago, the U.S. Army and the University of California joined together to undertake perhaps the most influential effort of the 20th century: the Manhattan Project. February 1, 2013 dummy image Read our archives. Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email The Laboratory plans wide-ranging activities to celebrate its 70th anniversary, with a full roster of lectures and events open to the public. Seventy years ago on the Pajarito Plateau, the U.S. Army and the University of California joined together to undertake perhaps the most

312

The role of in situ reforming in plasma enhanced ultra lean premixed methane/air flames  

Science Conference Proceedings (OSTI)

This paper describes a mechanism for the stabilization of ultra lean premixed methane/air flames by pulsed nonequilibrium plasma enhancement. It is shown that the pulsed discharge plasma produces a cool ({proportional_to}500-600 K) stream of relatively stable intermediate species including hydrogen (H{sub 2}) and carbon monoxide (CO), which play a central role in enhancing flame stability. This stream is readily visualized by ultraviolet emission from electronically excited hydroxyl (OH) radicals. The rotational and vibrational temperature of this ''preflame'' are determined from its emission spectrum. Qualitative imaging of the overall flame structure is obtained by planar laser-induced fluorescence measurements of OH. Preflame nitric oxide (NO) concentrations are determined by gas sampling chromatography. A simple numerical model of this plasma enhanced premixed flame is proposed that includes the generation of the preflame through plasma activation, and predicts the formation of a dual flame structure that arises when the preflame serves to pilot the combustion of the surrounding non-activated premixed flow. The calculation represents the plasma through its ability to produce an initial radical yield, which serves as a boundary condition for conventional flame simulations. The simulations also capture the presence of the preflame and the dual flame structure, and predict preflame levels of NO comparable to those measured. A subsequent pseudo-sensitivity analysis of the preflame shows that flame stability is most sensitive to the concentrations of H{sub 2} and CO in the preflame. As a consequence of the role of H{sub 2} and CO in enhancing the flame stability, the blowout limit extensions of methane/air and hydrogen/air mixtures in the absence/presence of a discharge are investigated experimentally. For methane/air mixtures, the blowout limit of the current burner is extended by {proportional_to}10% in the presence of a discharge while comparable studies carried out in lean hydrogen/air flames fail to extend this limit. (author)

Kim, Wookyung; Godfrey Mungal, M.; Cappelli, Mark A. [Mechanical Engineering Department, Stanford University, Bldg. 520, Stanford, CA 94305-3032 (United States)

2010-02-15T23:59:59.000Z

313

Application of Hydrogen Assisted Lean Operation to Natural Gas-Fueled Reciprocating Engines (HALO)  

SciTech Connect

Two key challenges facing Natural Gas Engines used for cogeneration purposes are spark plug life and high NOx emissions. Using Hydrogen Assisted Lean Operation (HALO), these two keys issues are simultaneously addressed. HALO operation, as demonstrated in this project, allows stable engine operation to be achieved at ultra-lean (relative air/fuel ratios of 2) conditions, which virtually eliminates NOx production. NOx values of 10 ppm (0.07 g/bhp-hr NO) for 8% (LHV H2/LHV CH4) supplementation at an exhaust O2 level of 10% were demonstrated, which is a 98% NOx emissions reduction compared to the leanest unsupplemented operating condition. Spark ignition energy reduction (which will increase ignition system life) was carried out at an oxygen level of 9%, leading to a NOx emission level of 28 ppm (0.13 g/bhp-hr NO). The spark ignition energy reduction testing found that spark energy could be reduced 22% (from 151 mJ supplied to the coil) with 13% (LHV H2/LHV CH4) hydrogen supplementation, and even further reduced 27% with 17% hydrogen supplementation, with no reportable effect on NOx emissions for these conditions and with stable engine torque output. Another important result is that the combustion duration was shown to be only a function of hydrogen supplementation, not a function of ignition energy (until the ignitability limit was reached). The next logical step leading from these promising results is to see how much the spark energy reduction translates into increase in spark plug life, which may be accomplished by durability testing.

Chad Smutzer

2006-01-01T23:59:59.000Z

314

NOx Storage and Reduction Properties of Model Ceria-based Lean NOx Trap Catalysts  

SciTech Connect

Three kinds of model ceria-containing LNT catalysts, corresponding to Pt/Ba/CeO{sub 2}, Pt/CeO{sub 2}/Al{sub 2}O{sub 3} and Pt/BaO/CeO{sub 2}/Al{sub 2}O{sub 3}, were prepared for comparison with a standard LNT catalyst of the Pt/BaO/Al{sub 2}O{sub 3} type. In these catalysts ceria functioned as a No{sub x} storage component and/or a support material. The influence of ceria on the microstructure of the catalysts was investigated, in addition to the effect on No{sub x} storage capacity, regeneration behavior and catalyst performance during lean/rich cycling. The Pt/Ba/CeO{sub 2} and Pt/BaO/CeO{sub 2}/Al{sub 2}O{sub 3} catalysts exhibited higher No{sub x} storage capacity at 200 and 300 C relative to the Pt/BaO/Al{sub 2}O{sub 3} catalyst, although the latter displayed better storage capacity at 400 C. Catalyst regeneration behavior at low temperature was also improved by the presence of ceria, as reflected by TPR measurements. These factors contributed to the superior No{sub x} storage-reduction performance exhibited by the Pt/Ba/CeO{sub 2} and Pt/BaO/CeO{sub 2}/Al{sub 2}O{sub 3} catalysts under cycling conditions in the temperature range 200-300 C. Overall, Pt/BaO/CeO{sub 2}/Al{sub 2}O{sub 3} (which displayed well balanced No{sub x} storage and regeneration behavior), showed the best performance, affording consistently high No{sub x} conversion levels in the temperature range 200-400 C under lean-rich cycling conditions.

Shi, Chuan [Dalian University; Ji, Yaying [University of Kentucky; Graham, Uschi [University of Kentucky; Jacobs, Gary [University of Kentucky; Crocker, Mark [University of Kentucky; Zhang, Zhaoshun [Dalian University; Wang, Yu [Dalian University; Toops, Todd J [ORNL

2012-01-01T23:59:59.000Z

315

Advanced Manufacturing Office: Solicitations  

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

Solicitations on Twitter Bookmark Advanced Manufacturing Office: Solicitations on Google Bookmark Advanced Manufacturing Office: Solicitations on Delicious Rank Advanced...

316

Advanced Manufacturing Office: Webcasts  

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

Office: Webcasts on Twitter Bookmark Advanced Manufacturing Office: Webcasts on Google Bookmark Advanced Manufacturing Office: Webcasts on Delicious Rank Advanced...

317

Advanced Manufacturing Office: Subscribe  

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

Office: Subscribe on Twitter Bookmark Advanced Manufacturing Office: Subscribe on Google Bookmark Advanced Manufacturing Office: Subscribe on Delicious Rank Advanced...

318

Advanced Manufacturing Office: Workshops  

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

Office: Workshops on Twitter Bookmark Advanced Manufacturing Office: Workshops on Google Bookmark Advanced Manufacturing Office: Workshops on Delicious Rank Advanced...

319

Influence of transport phenomena on the structure of lean premixed hydrogen air flames  

Science Conference Proceedings (OSTI)

Because of hydrogen release during a hypothetical severe accident in a light water reactor, an intense investigation of premixed hydrogen-air combustion and connected safety aspects is being conducted. Hydrogen combustion in the course of a gradual hydrogen release normally starts out from slow deflagrations, which, however, can be accelerated to very high flame speeds by flame-obstacle interaction yielding a complex superimposition of chemical kinetics and turbulent heat and mass transfer. Numerical models for the turbulent burning rate rely mainly on the assumption of continuous wrinkled or corrugated flame fronts, which are stretched or quenched, respectively, by flow strain and small-scale fluctuations. Considerable deviations in calculated burning rates point at physical mechanisms that are not yet satisfactorily understood.

Ardey, N.; Mayinger, F.; Durst, B. [Technical Univ., Munich (Germany)

1995-12-31T23:59:59.000Z

320

Furniture wood wastes: Experimental property characterisation and burning tests  

Science Conference Proceedings (OSTI)

Referring to the industrial wood waste category (as dominant in the provincial district of Pesaro-Urbino, Marche Region, Italy), this paper deals with the experimental characterisation and the carrying out of non-controlled burning tests (at lab- and pilot-scale) for selected 'raw' and primarily 'engineered' ('composite') wood wastes. The property characterisation has primarily revealed the following aspects: potential influence on moisture content of local weather conditions at outdoor wood waste storage sites; generally, higher ash contents in 'engineered' wood wastes as compared with 'raw' wood wastes; and relatively high energy content values of 'engineered' wood wastes (ranging on the whole from 3675 to 5105 kcal kg{sup -1} for HHV, and from 3304 to 4634 kcal kg{sup -1} for LHV). The smoke qualitative analysis of non-controlled lab-scale burning tests has primarily revealed: the presence of specific organic compounds indicative of incomplete wood combustion; the presence exclusively in 'engineered' wood burning tests of pyrroles and amines, as well as the additional presence (as compared with 'raw' wood burning) of further phenolic and containing nitrogen compounds; and the potential environmental impact of incomplete industrial wood burning on the photochemical smog phenomenon. Finally, non-controlled pilot-scale burning tests have primarily given the following findings: emission presence of carbon monoxide indicative of incomplete wood combustion; higher nitrogen oxide emission values detected in 'engineered' wood burning tests as compared with 'raw' wood burning test; and considerable generation of the respirable PM{sub 1} fraction during incomplete industrial wood burning.

Tatano, Fabio [Faculty of Sciences and Technologies, University of Urbino 'Carlo Bo', Campus Scientifico - Sogesta, 61029 Urbino (Italy)], E-mail: fabio.tatano@uniurb.it; Barbadoro, Luca; Mangani, Giovanna; Pretelli, Silvia; Tombari, Lucia; Mangani, Filippo [Faculty of Sciences and Technologies, University of Urbino 'Carlo Bo', Campus Scientifico - Sogesta, 61029 Urbino (Italy)

2009-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Advanced Systems  

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

Advanced Systems: Advanced Systems: high Performance fenestration systems Research areas: Research activities to improve the performance of windows and other fenestration products must address window systems issues as well as Glazing Materials research. LBNL activities in the area of Advanced Systems include research at both the product level and the building envelope and building systems levels. Highly insulating windows - using non structural center layers Lower cost solutions to more insulating three layer glazing systems, with the potential to turn windows in U.S. heating dominated residential applications into net-energy gainers. Highly Insulating Window Frames In collaboration with the Norwegian University of Science and Technology, we are researching the potentials for highly insulating window frames. Our initial work examines European frames with reported U-factors under 0.15 Btu/hr-ft2-F. Future research aims to analyze these designs, verify these performance levels and ensure that procedures used to calculate frame performance are accurate.

322

Oil/gas separator for installation at burning wells  

DOE Patents (OSTI)

An oil/gas separator is disclosed that can be utilized to return the burning wells in Kuwait to production. Advantageously, a crane is used to install the separator at a safe distance from the well. The gas from the well is burned off at the site, and the oil is immediately pumped into Kuwait's oil gathering system. Diverters inside the separator prevent the oil jet coming out of the well from reaching the top vents where the gas is burned. The oil falls back down, and is pumped from an annular oil catcher at the bottom of the separator, or from the concrete cellar surrounding the well.

Alonso, Carol T. (Orinda, CA); Bender, Donald A. (Dublin, CA); Bowman, Barry R. (Livermore, CA); Burnham, Alan K. (Livermore, CA); Chesnut, Dwayne A. (Pleasanton, CA); Comfort, III, William J. (Livermore, CA); Guymon, Lloyd G. (Livermore, CA); Henning, Carl D. (Livermore, CA); Pedersen, Knud B. (Livermore, CA); Sefcik, Joseph A. (Tracy, CA); Smith, Joseph A. (Livermore, CA); Strauch, Mark S. (Livermore, CA)

1993-01-01T23:59:59.000Z

323

Oil/gas separator for installation at burning wells  

DOE Patents (OSTI)

An oil/gas separator is disclosed that can be utilized to return the burning wells in Kuwait to production. Advantageously, a crane is used to install the separator at a safe distance from the well. The gas from the well is burned off at the site, and the oil is immediately pumped into Kuwait`s oil gathering system. Diverters inside the separator prevent the oil jet coming out of the well from reaching the top vents where the gas is burned. The oil falls back down, and is pumped from an annular oil catcher at the bottom of the separator, or from the concrete cellar surrounding the well.

Alonso, C.T.; Bender, D.A.; Bowman, B.R. [and others

1991-12-31T23:59:59.000Z

324

Oil/gas separator for installation at burning wells  

DOE Patents (OSTI)

An oil/gas separator is disclosed that can be utilized to return the burning wells in Kuwait to production. Advantageously, a crane is used to install the separator at a safe distance from the well. The gas from the well is burned off at the site, and the oil is immediately pumped into Kuwait's oil gathering system. Diverters inside the separator prevent the oil jet coming out of the well from reaching the top vents where the gas is burned. The oil falls back down, and is pumped from an annular oil catcher at the bottom of the separator, or from the concrete cellar surrounding the well.

Alonso, C.T.; Bender, D.A.; Bowman, B.R.; Burnham, A.K.; Chesnut, D.A.; Comfort, W.J. III; Guymon, L.G.; Henning, C.D.; Pedersen, K.B.; Sefcik, J.A.; Smith, J.A.; Strauch, M.S.

1993-03-09T23:59:59.000Z

325

Can Consumers Escape the Market? Emancipatory Illuminations from Burning Man  

E-Print Network (OSTI)

This ethnography explores the emancipatory dynamics of the Burning Man project, a one-week-long antimarket event. Practices used at Burning Man to distance consumers from the market include discourses supporting communality and disparaging market logics, alternative exchange practices, and positioning consumption as self-expressive art. Findings reveal several communal practices that distance consumption from broader rhetorics of efficiency and rationality. Although Burning Man’s participants materially support the market, they successfully construct a temporary hypercommunity from which to practice divergent social logics. Escape from the market, if possible at all, must be conceived of as similarly temporary and local.

Robert V. Kozinets

2002-01-01T23:59:59.000Z

326

Spectral hole burning for stopping light  

E-Print Network (OSTI)

We propose a novel protocol for storage and retrieval of photon wave packets in a $\\Lambda$-type atomic medium. This protocol derives from spectral hole burning and takes advantages of the specific properties of solid state systems at low temperature, such as rare earth ion doped crystals. The signal pulse is tuned to the center of the hole that has been burnt previously within the inhomogeneously broadened absorption band. The group velocity is strongly reduced, being proportional to the hole width. This way the optically carried information and energy is carried over to the off-resonance optical dipoles. Storage and retrieval are performed by conversion to and from ground state Raman coherence by using brief $\\pi$-pulses. The protocol exhibits some resemblance with the well known electromagnetically induced transparency process. It also presents distinctive features such as the absence of coupling beam. In this paper we detail the various steps of the protocol, summarize the critical parameters and theoretically examine the recovery efficiency.

R. Lauro; T. Chaneliere; J. -L. Le Gouet

2009-02-16T23:59:59.000Z

327

ARM - Field Campaign - Biomass Burning Observation Project - BBOP  

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

govCampaignsBiomass Burning Observation Project - BBOP govCampaignsBiomass Burning Observation Project - BBOP Campaign Links BNL BBOP Website ARM Aerial Facility Payload Science Plan Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Biomass Burning Observation Project - BBOP 2013.07.01 - 2013.10.24 Website : http://campaign.arm.gov/bbop/ Lead Scientist : Larry Kleinman For data sets, see below. Description This field campaign will address multiple uncertainties in aerosol intensive properties, which are poorly represented in climate models, by means of aircraft measurements in biomass burning plumes. Key topics to be investigated are: Aerosol mixing state and morphology Mass absorption coefficients (MACs) Chemical composition of non-refractory material associated with

328

The Way We Burn: Combustion, Climate, and Carbonaceous Particles  

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

The Way We Burn: Combustion, Climate, and Carbonaceous Particles Speaker(s): Tami Bond Date: June 5, 2002 - 12:00pm Location: Bldg. 90 Carbonaceous particles-- which engineers...

329

Study of Buoyancy-Driven Turbulent Nuclear Burning and Validation...  

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

Study of Buoyancy-Driven Turbulent Nuclear Burning and Validation of Type Ia Supernova Models PI Name: Don Lamb PI Email: lamb@oddjob.uchicago.edu Institution: ASCAlliance Flash...

330

Study of Buoyancy-Driven Turbulent Nuclear Burning and Validation...  

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

created from a simulation run on the Blue GeneP at the Argonne Leadership Computing Facility in 2009. Study of Buoyancy-Driven Turbulent Nuclear Burning and Validation of Type Ia...

331

Evaluation of the carbon content of aerosols from the burning...  

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

Evaluation of the carbon content of aerosols from the burning of biomass in the Brazilian Amazon using thermal, optical and thermal-optical analysis methods Title Evaluation of the...

332

Transuranic Burning Issues Related to a Second Geologic Repository  

Science Conference Proceedings (OSTI)

This report defines issues that need to be addressed by a development program recently initiated to establish the viability of a transuranic burning concept application that would achieve a substantial delay to the need date for a second geologic repository. The visualized transuranic burning concept application is one in which spent fuel created after a date in the 2010 time frame or later would be processed and the separated plutonium used to start up liquid metal reactors (LMRs).

1992-07-01T23:59:59.000Z

333

Assessment of emissions prediction capability of RANS based PDF models for lean premixed combustion of methane  

DOE Green Energy (OSTI)

The high computational cost of Large Eddy Simulation (LES) makes Reynolds Averaged Navier-Stokes (RANS) methods the current standard for turbulent combustion modeling. Empirical models for turbulence, turbulence-combustion interaction and chemical kinetics are, however, a major source of uncertainty in RANS based combustion simulation. While Probability Density Function (PDF) based models overcome some of these issues, most commercial codes do not take full advantage of these models. In this study, lean premixed combustion of methane in a bluff-body combustor is simulated using two different reduced chemical mechanisms (ARM9 and ARM19) combined with the composition PDF transport combustion model in the commercial code FLUENT. Two different turbulence models, namely the RNG k-? model and the Reynolds Stress Model (RSM) are used and the results of the simulations are compared to experimental data. For all the models tested, the prediction of temperature and major species (CH4, O2, CO2, CO, H2, and H2O) was good when compared to experiments. While all of the model predictions for the intermediate species OH showed an order magnitude difference (compared to the experiments) close to the bluff body surface; downstream axial locations showed good quantitative and qualitative agreement with the experiments. In a trend similar to the previous study (Nanduri et al., 2007) using the Eddy Dissipation Concept (EDC) model, predicted values for NO emission radial profiles showed an average difference of ±5 ppm when compared to experimental values. The results were also compared to the results of a velocity-composition joint PDF model developed by researchers at the University of Pittsburgh. In terms of emissions (NO and CO) predictions the relatively expensive composition PDF model in FLUENT did not give significant improvement when compared to the computationally cheaper EDC models. However, the velocity-composition joint PFD model used by researchers at the University of Pittsburgh did show significant improvement over EDC models in the prediction of NO. Both of the PDF models resulted in better qualitative and quantitative agreement in H2 prediction, thus showing the promise of PDF based models in simulating lean premixed combustion of fuel blends like hydrogen enriched natural gas.

Parsons, D.R.; Nanduri, J.R.; Celik, Ismail; Strakey, P.A.

2008-01-01T23:59:59.000Z

334

Metallic fuels: The EBR-II legacy and recent advances  

SciTech Connect

Experimental Breeder Reactor – II (EBR-II) metallic fuel was qualified for high burnup to approximately 10 atomic per cent. Subsequently, the electrometallurgical treatment of this fuel was demonstrated. Advanced metallic fuels are now investigated for increased performance, including ultra-high burnup and actinide burning. Advances include additives to mitigate the fuel/cladding chemical interaction and uranium alloys that combine Mo, Ti and Zr to improve alloy performance. The impacts of the advances—on fabrication, waste streams, electrorefining, etc.—are found to be minimal and beneficial. Owing to extensive research literature and computational methods, only a modest effort is required to complete their development.

Douglas L. Porter; Steven L. Hayes; J. Rory Kennedy

2012-09-01T23:59:59.000Z

335

An Assessment of the Degree of Implementation of the Lean Aerospace Initiative Principles and Practices within the US Aerospace and Defense Industry  

E-Print Network (OSTI)

This report is a formal documentation of the results of an assessment of the degree to which Lean Principles and Practices have been implemented in the US Aerospace and Defense Industry. An Industry Association team prepared ...

Shaw, Thomas E.

336

The implementation dynamics of continuous improvement throughout the corporate hierarchy based on lean six sigma at DTE energy by Timothy David Quinn.  

E-Print Network (OSTI)

This dissertation comprises a case study and formal simulation model of DTE Energy's Lean Six Sigma continuous-improvement (CI) program from its inception in 1998 through the end of 2009. The case history is based on ...

Quinn, Timothy David

2011-01-01T23:59:59.000Z

337

An Experimental Study of the Velocity-Forced Flame Response of Lean-Fremixed Multi-Nozzle Can Combustor for Gas Turbines.  

E-Print Network (OSTI)

??The velocity forced flame response of a multi-nozzle, lean-premixed, swirl-stabilized, turbulent combustor was investigated at atmospheric pressure. The purpose of this study was to analyze… (more)

Szedlmayer, Michael

2013-01-01T23:59:59.000Z

338

I I Green, Lisle R. Burning by prescriptionin chaparral. Berkeley, Calif.: Pacific Southwest Forest  

E-Print Network (OSTI)

;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;#12;I I I I I Green, Lisle R. Burning.S. Dep. Agric.: 1981; Gen. Tech. Rep. PSW-51. 36 p. 1 I Prescribed burning is frequently suggested for reducing conflagration costs in chaparral. Prepara- tion for a prescribed burn includes environmental

Standiford, Richard B.

339

THE BURNING ISSUES OF MUNICIPAL SOLID WASTE DISPOSAL WHAT WORKS AND WHAT DOESN'T  

E-Print Network (OSTI)

1 THE BURNING ISSUES OF MUNICIPAL SOLID WASTE DISPOSAL ­ WHAT WORKS AND WHAT DOESN'T By: Jack D devil burns and the Lord recycles." Perhaps these negative references to waste burning come from, the Valley of Hinnom south of ancient Jerusalem. This was the site of a foul, smoking, open burning garbage

Columbia University

340

Patch-Burning: "Rotational Grazing Without Fences" Using Fire and Grazing to Restore Diversity on Grasslands  

E-Print Network (OSTI)

Patch-Burning: "Rotational Grazing Without Fences" Using Fire and Grazing to Restore Diversity characteristics. Patch Burning and Grazing Can Promote Diversity The objective of patch burning is to create State University burn portions of unfenced landscapes each year. Livestock focus grazing on recently

Debinski, Diane M.

Note: This page contains sample records for the topic "advanced lean burn" 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

Proceedings of the Sudden Oak Death Third Science Symposium Implementation of a Thinning and Burning  

E-Print Network (OSTI)

and Burning Study in Tanoak-Redwood Stands in Santa Cruz and Mendocino Counties1 Kevin L. O'Hara2 and Kristen the effects of thinning and prescribed burning on infection and spread of Phytophthora ramorum. Study sites burning. Introduction Thinning and burning effects on infection by and spread of Phytophthora ramorum

Standiford, Richard B.

342

Fertilizing and Burning Flint Hills Bluestem CLENTON E. OWENSBY AND ED F. SMITH  

E-Print Network (OSTI)

Fertilizing and Burning Flint Hills Bluestem CLENTON E. OWENSBY AND ED F. SMITH Abstract Burned of nitrogen applied more than 80 lb N/acre did. Maintenance of good quality range was favored by burning and 0 and 40 lb N/acre compared to not burning and the same fertilizer rates. Eighty lb N/acre produced poor

Owensby, Clenton E.

343

High-Bandwidth Modulation of H2/Syngas Fuel to Control Combustion Dynamics in Micro-Mixing Lean Premix - Parker Hannifin  

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

Bandwidth Modulation of H Bandwidth Modulation of H 2 /Syngas Fuel to Control Combustion Dynamics in Micro-Mixing Lean Premix-Parker Hannifin Background In this congressionally directed project, Parker Hannifin Corporation (Parker), in cooperation with Georgia Institute of Technology (Georgia Tech), will enhance its micro-mixing injector platform to improve combustion operability in lean premix turbine systems by attenuating the combustion dynamics. This will be accomplished

344

Advanced Search  

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

Publications Publications Advanced Search Most publications by Environmental Energy Technologies Division authors are searchable from this page, including peer-reviewed publications, book chapters, conference proceedings and LBNL reports. Filter Advanced Search Publications list This publications database is an ongoing project, and not all Division publications are represented here yet. For additional help see the bottom of this page. Documents Found: 4418 Title Keyword LBNL Number Author - Any - Abadie, Marc O Abbey, Chad Abdolrazaghi, Mohamad Aberg, Annika Abhyankar, Nikit Abraham, Marvin M Abshire, James B Abushakra, Bass Acevedo-Ruiz, Manuel Aceves, Salvador Ache, Hans J Ackerly, David D Ackerman, Andrew S Adamkiewicz, Gary Adams, J W Adams, Carl Adamson, Bo Addy, Nathan Addy, Susan E Aden, Nathaniel T Adesola, Bunmi Adhikari,

345

Advanced Combustion  

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

Systems Systems Advanced Combustion Background Conventional coal-fired power plants utilize steam turbines to generate electricity, which operate at efficiencies of 35-37 percent. Operation at higher temperatures and pressures can lead to higher efficiencies, resulting in reduced fuel consumption and lower greenhouse gas emissions. Higher efficiency also reduces CO2 production for the same amount of energy produced, thereby facilitating a reduction in greenhouse gas emissions. When combined, oxy-combustion comes with an efficiency hit, so it will actually increase the amount of CO2 to be captured. But without so much N2 in the flue gas, it will be easier and perhaps more efficient to capture, utilize and sequester. NETL's Advanced Combustion Project and members of the NETL-Regional University

346

Advanced Combustion  

Science Conference Proceedings (OSTI)

The activity reported in this presentation is to provide the mechanical and physical property information needed to allow rational design, development and/or choice of alloys, manufacturing approaches, and environmental exposure and component life models to enable oxy-fuel combustion boilers to operate at Ultra-Supercritical (up to 650{degrees}C & between 22-30 MPa) and/or Advanced Ultra-Supercritical conditions (760{degrees}C & 35 MPa).

Holcomb, Gordon R. [NETL

2013-03-11T23:59:59.000Z

347

Clean-Burning Wood Stove Grant Program (Maryland) | Department of Energy  

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

Clean-Burning Wood Stove Grant Program (Maryland) Clean-Burning Wood Stove Grant Program (Maryland) Clean-Burning Wood Stove Grant Program (Maryland) < Back Eligibility Residential Savings Category Bioenergy Program Info Start Date 09/07/2012 State Maryland Program Type State Rebate Program Rebate Amount Stick Burning Stove: $500 Pellet Burning Stove: $700 The Maryland Energy Administration (MEA) now offers the Clean Burning Wood Stove Grant program as part of its Residential Clean Energy Grant Program. The Clean Burning Wood Stove Grant program offers a flat grant award of $500 for stick burning wood stoves and $700 for pellet burning wood stoves that meet program eligibility requirements. Basic requirements for grant funding include: *The property must serve as primary residence *Clean burning wood stove must replace existing electric or non-natural gas

348

Effects of buoyancy on the flowfields of lean premixed turbulentv-flames  

SciTech Connect

Open laboratory turbulent flames used for investigating fundament flame turbulence interactions are greatly affected by buoyancy. Though much of our current knowledge is based on observations made in these open flames, the effects of buoyancy are usually not included in data interpretation, numerical analysis or theories. This inconsistency remains an obstacle to merging experimental observations and theoretical predictions. To better understanding the effects of buoyancy, our research focuses on steady lean premixed flames propagating in fully developed turbulence. We hypothesize that the most significant role of buoyancy forces on these flames is to influence their flowfields through a coupling with mean and fluctuating pressure fields. Changes in flow pattern alter the mean aerodynamic stretch and in turn affect turbulence fluctuation intensities both upstream and downstream of the flame zone. Consequently, flame stabilization, reaction rates, and turbulent flame processes are all affected. This coupling relates to the elliptical problem that emphasizes the importance of the upstream, wall and downstream boundary conditions in determining all aspects of flame propagation. Therefore, buoyancy has the same significance as other parameters such as flow configuration, flame geometry, means of flame stabilization, flame shape, enclosure size, mixture conditions, and flow conditions.

Cheng, R.K.; Bedat, B.; Yegian, D.T.; Greenberg, P.

2001-03-01T23:59:59.000Z

349

Simulation of lean NOx trap performance with microkinetic chemistry and without mass transfer.  

SciTech Connect

A microkinetic chemical reaction mechanism capable of describing both the storage and regeneration processes in a fully formulated lean NO{sub x} trap (LNT) is presented. The mechanism includes steps occurring on the precious metal, barium oxide (NO{sub x} storage), and cerium oxide (oxygen storage) sites of the catalyst. The complete reaction set is used in conjunction with a transient plug flow reactor code to simulate not only conventional storage/regeneration cycles with a CO/H{sub 2} reductant, but also steady flow temperature sweep experiments that were previously analyzed with just a precious metal mechanism and a steady state code. The results show that NO{sub x} storage is not negligible during some of the temperature ramps, necessitating a re-evaluation of the precious metal kinetic parameters. The parameters for the entire mechanism are inferred by finding the best overall fit to the complete set of experiments. Rigorous thermodynamic consistency is enforced for parallel reaction pathways and with respect to known data for all of the gas phase species involved. It is found that, with a few minor exceptions, all of the basic experimental observations can be reproduced with these purely kinetic simulations, i.e., without including mass-transfer limitations. In addition to accounting for normal cycling behavior, the final mechanism should provide a starting point for the description of further LNT phenomena such as desulfation and the role of alternative reductants.

Larson, Rich; Daw, C. Stuart (Oak Ridge National Laboratory, Knoxville, TN); Pihl, Josh A. (Oak Ridge National Laboratory, Knoxville, TN); Chakravarthy, V. Kalyana (Oak Ridge National Laboratory, Knoxville, TN)

2011-08-01T23:59:59.000Z

350

Topical Area MFE Title: Burning Plasma Science_____________________________________________ Description Fusion energy is released by burning light elements using nuclear reactions which consume mass and  

E-Print Network (OSTI)

Page 1 Topical Area MFE Title: Burning Plasma Science_____________________________________________ · Description Fusion energy is released by burning light elements using nuclear reactions which consume mass-sustained purely by its alpha particle heating. The science of burning plasmas consists of: (1) the physics

351

Topical Area: MFE Title: Burning Plasma Experimental Options______________________________ Description The options for a Next Step Burning Plasma Experiment are defined by the overall strategic  

E-Print Network (OSTI)

Page 1 Topical Area: MFE Title: Burning Plasma Experimental Options______________________________ · Description The options for a Next Step Burning Plasma Experiment are defined by the overall strategic of developing and integrating burning plasma physics, long pulse physics and technology, and fusion technologies

352

Coated Particle Fuel and Deep Burn Program Monthly Highlights January 2011  

Science Conference Proceedings (OSTI)

During FY 2011 the CP & DB Program will report Highlights on a monthly basis, but will no longer produce Quarterly Progress Reports. Technical details that were previously included in the quarterly reports will be included in the appropriate Milestone Reports that are submitted to FCRD Program Management. These reports will also be uploaded to the Deep Burn website. The Monthly Highlights report for December 2010, ORNL/TM-2011/10, was distributed to program participants on January 12, 2011. As reported last month, the final Quarterly for FY 2010, Deep Burn Program Quarterly Report for July - September 2010, ORNL/TM-2010/301, was announced to program participants and posted to the website on December 28, 2010. This report discusses the following: (1) Thermochemical Data and Model Development - (a) Thermochemical Modeling, (b) Actinide and Fission Product Transport, (c) Radiation Damage and Properties; (2) TRU (transuranic elements) TRISO (tri-structural isotropic) Development - (a) TRU Kernel Development, (b) Coating Development; (3) Advanced TRISO Applications - Metal Matrix Fuels for LWR; (4) LWR Fully Ceramic Fuel - (a) FCM Fabrication Development, (b) FCM Irradiation Testing; (5) Fuel Performance and Analytical Analysis - Fuel Performance Modeling.

Snead, Lance Lewis [ORNL; Bell, Gary L [ORNL; Besmann, Theodore M [ORNL

2011-02-01T23:59:59.000Z

353

Coated Particle Fuel and Deep Burn Program Monthly Highlights February 2011  

Science Conference Proceedings (OSTI)

During FY 2011 the CP & DB Program will report Highlights on a monthly basis, but will no longer produce Quarterly Progress Reports. Technical details that were previously included in the quarterly reports will be included in the appropriate Milestone Reports that are submitted to FCRD Program Management. These reports will also be uploaded to the Deep Burn website. The Monthly Highlights report for January 2010, ORNL/TM-2011/30, was distributed to program participants on February 8, 2011. As reported previously, the final Quarterly for FY 2010, Deep Burn Program Quarterly Report for July - September 2010, ORNL/TM-2010/301, was announced to program participants and posted to the website on December 28, 2010. This report discusses the following: (1) Thermochemical Data and Model Development - (a) Thermochemical Modeling, (b) Actinide and Fission Product Transport, (c) Radiation Damage and Properties; (2) TRU (transuranic elements) TRISO (tri-structural isotropic) Development - (a) TRU Kernel Development, (b) Coating Development; (3) Advanced TRISO Applications - Metal Matrix Fuels for LWR; (4) LWR Fully Ceramic Fuel - (a) FCM Fabrication Development, (b) FCM Irradiation Testing; and (5) Fuel Performance and Analytical Analysis - Fuel Performance Modeling.

Snead, Lance Lewis [ORNL; Bell, Gary L [ORNL; Besmann, Theodore M [ORNL

2011-03-01T23:59:59.000Z

354

Coated Particle Fuel and Deep Burn Program Monthly Highlights March 2011  

SciTech Connect

During FY 2011 the CP & DB Program will report Highlights on a monthly basis, but will no longer produce Quarterly Progress Reports. Technical details that were previously included in the quarterly reports will be included in the appropriate Milestone Reports that are submitted to FCRD Program Management. These reports will also be uploaded to the Deep Burn website. The Monthly Highlights report for February 2011, ORNL/TM-2011/71, was distributed to program participants on March 8, 2011. As reported previously, the final Quarterly for FY 2010, Deep Burn Program Quarterly Report for July - September 2010, ORNL/TM-2010/301, was announced to program participants and posted to the website on December 28, 2010. This report discusses the following: (1) Thermochemical Data and Model Development - (a) Thermochemical Modeling, (b) Thermomechanical Behavior, (c) Actinide and Fission Product Transport, (d) Radiation Damage and Properties; (2) TRU (transuranic elements) TRISO (tri-structural isotropic) Development - (a) TRU Kernel Development, (b) Coating Development; (3) Advanced TRISO Applications - Metal Matrix Fuels for LWR; (4) LWR Fully Ceramic Fuel - (a) FCM Fabrication Development, (b) FCM Irradiation Testing; and (5) Fuel Performance and Analytical Analysis - Fuel Performance Modeling.

Snead, Lance Lewis [ORNL; Bell, Gary L [ORNL; Besmann, Theodore M [ORNL

2011-04-01T23:59:59.000Z

355

Advanced Energy Storage Publications  

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

Advanced Energy Storage Publications Reports: Advanced Technology Development Program For Lithium-Ion Batteries: Gen 2 Performance Evaluation Final Report Advanced Technology...

356

Advanced Manufacturing Office: News  

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

Manufacturing Office: News on Twitter Bookmark Advanced Manufacturing Office: News on Google Bookmark Advanced Manufacturing Office: News on Delicious Rank Advanced Manufacturing...

357

Advanced Research  

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

Ductility EnhancEmEnt of molybDEnum Ductility EnhancEmEnt of molybDEnum PhasE by nano-sizED oxiDE DisPErsions Description Using computational modeling techniques, this research aims to develop predictive capabilities to facilitate the design and optimization of molybdenum (Mo), chromium (Cr), and other high-temperature structural materials to enable these materials to withstand the harsh environments of advanced power generation systems, such as gasification-based systems. These types of materials are essential to the development of highly efficient, clean energy technologies such as low-emission power systems that use coal or other fossil fuels.

358

Advanced Research  

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

Super HigH-TemperaTure alloyS and Super HigH-TemperaTure alloyS and CompoSiTeS From nb-W-Cr SySTemS Description The U.S. Department of Energy's Office of Fossil Energy (DOE-FE) has awarded a three-year grant to the University of Texas at El Paso (UTEP) and Argonne National Laboratory (ANL) to jointly explore the high-temperature properties of alloys composed of niobium (Nb), tungsten (W), and chromium (Cr). The grant is administered by the Advanced Research (AR) program of the National

359

Mission Advancing  

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

NETL Accomplishments NETL Accomplishments - the lab 2 Mission Advancing energy options to fuel our economy, strengthen our security, and improve our environment. Renewed Prosperity Through Technological Innovation - Letter from the Director NETL: the ENERGY lab 4 6 3 Contents Technology Transfer Patents and Commercialization Sharing Our Expertise Noteworthy Publications 60 62 63 64 66 Environment, Economy, & Supply Carbon Capture and Storage Partnerships Work to Reduce Atmospheric CO 2 Demand-Side Efficiencies New NETL Facility Showcases Green Technologies Environment & Economy Materials Mercury Membranes NETL Education Program Produces Significant Achievement Monitoring Water Economy & Supply NETL's Natural Gas Prediction Tool Aids Hurricane Recovery Energy Infrastructure

360

Development of Burning Plasma and Advanced Scenarios in the DIII-D Tokamak (A24845)  

E-Print Network (OSTI)

Proc. 20th IAEA Fusion Energy Conf., Vilamoura, Portugal, 2004 (International Atomic Energy Agency, Vienna) To Be Webbed20th IAEA Fusion Energy Conference Vilamoura, PT, 2004999609860

Luce, T.C.

2004-11-02T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

On burning regimes and long duration X-ray bursts  

E-Print Network (OSTI)

Hydrogen and helium accreted onto a neutron star undergo thermonuclear burning. Explosive burning is observed as a type I X-ray burst. We describe the different burning regimes and focus on some of the current inconsistencies between theory and observations. Of special interest are the rare kinds of X-ray bursts such as carbon-fueled superbursts and helium-fueled intermediately long X-ray bursts. These bursts are thought to originate deeper in the neutron star envelope, such that they are probes of the thermal properties of the crust. We investigate the possibility of observing superbursts with the wide-field instruments INTEGRAL-ISGRI and Swift-BAT. We find that only the brightest bursts are detectable.

L. Keek; J. J. M. in 't Zand

2008-11-27T23:59:59.000Z

362

Theory of Antineutrino Monitoring of Burning MOX Plutonium Fuels  

E-Print Network (OSTI)

This letter presents the physics and feasibility of reactor antineutrino monitoring to verify the burnup of plutonium loaded in the reactor as a Mixed Oxide (MOX) fuel. It examines the magnitude and temporal variation in the antineutrino signals expected for different MOX fuels, for the purposes of nuclear accountability and safeguards. The antineutrino signals from reactor-grade and weapons-grade MOX are shown to be distinct from those from burning low enriched uranium. Thus, antineutrino monitoring could be used to verify the destruction of plutonium in reactors, though verifying the grade of the plutonium being burned is found to be more challenging.

Hayes, A C; Nieto, Michael Martin; WIlson, W B

2011-01-01T23:59:59.000Z

363

Thermal regimes of high burn-up nuclear fuel rod  

E-Print Network (OSTI)

The temperature distribution in the nuclear fuel rods for high burn-up is studied. We use the numerical and analytical approaches. It is shown that the time taken to have the stationary thermal regime of nuclear fuel rod is less than one minute. We can make the inference that the behavior of the nuclear fuel rod can be considered as a stationary task. Exact solutions of the temperature distribution in the fuel rods in the stationary case are found. Thermal regimes of high burn-up the nuclear fuel rods are analyzed.

Kudryashov, Nikolai A; Chmykhov, Mikhail A; 10.1016/j.cnsns.2009.05.063

2012-01-01T23:59:59.000Z

364

Theory of Antineutrino Monitoring of Burning MOX Plutonium Fuels  

E-Print Network (OSTI)

This letter presents the physics and feasibility of reactor antineutrino monitoring to verify the burnup of plutonium loaded in the reactor as a Mixed Oxide (MOX) fuel. It examines the magnitude and temporal variation in the antineutrino signals expected for different MOX fuels, for the purposes of nuclear accountability and safeguards. The antineutrino signals from reactor-grade and weapons-grade MOX are shown to be distinct from those from burning low enriched uranium. Thus, antineutrino monitoring could be used to verify the destruction of plutonium in reactors, though verifying the grade of the plutonium being burned is found to be more challenging.

A. C. Hayes; H. R. Trellue; Michael Martin Nieto; W. B. WIlson

2011-10-03T23:59:59.000Z

365

NOx Storage-Reduction Characteristics of Ba-Based Lean NOx Trap Catalysts Subjected to Simulated Road Aging  

SciTech Connect

Although Lean NO{sub x} Trap (LNT) catalyst technology has made significant strides in recent years, the issue of LNT durability remains problematic. Following on from our previous research concerning the effect of ceria addition on LNT preformance, in this study we focus on the role of ceria in ameliorating the deterioration of Ba-based LNT catalysts during aging. Indeed, we have observed that spectacular improvements in LNT durability can be achieved through the incorporation of CeO{sub 2}-ZrO{sub 2} into the LNT formulation, and, to a lesser extent, La-stabilized ceria.

Ji, Yaying [University of Kentucky; Fisk, Courtney [University of Kentucky; Easterling, Vencon [University of Kentucky; Graham, Uschi [University of Kentucky; Poole, Adam [University of Kentucky; Crocker, Mark [University of Kentucky; Choi, Jae-Soon [ORNL; Partridge Jr, William P [ORNL; Wilson, Karen [University of York, UK

2010-01-01T23:59:59.000Z

366

BURNING BURIED SUNSHINE: HUMAN CONSUMPTION OF ANCIENT SOLAR ENERGY  

E-Print Network (OSTI)

BURNING BURIED SUNSHINE: HUMAN CONSUMPTION OF ANCIENT SOLAR ENERGY JEFFREY S. DUKES Department of as a vast store of solar energy from which society meets >80% of its current energy needs. Here, using of ancient solar energy decline, humans are likely to use an increasing share of modern solar resources. I

Dukes, Jeffrey

367

More than words : a biography of Daniel Francis Burns  

E-Print Network (OSTI)

Daniel Francis Burns was born in Ireland in 1888 and immigrated to the United States in 1912. He married Mary O'Neill in 1923 and had a family of seven children. He worked as a police officer in the Boston Police Department ...

Burns, Matthew R. (Matthew Robert)

2005-01-01T23:59:59.000Z

368

Burning Man at Google: a cultural infrastructure for  

E-Print Network (OSTI)

Burning Man at Google: a cultural infrastructure for new media production FRED TURNER Stanford's bohemian ethos supports new forms of production emerging in SiliconValley and especially at Google to shape and legitimate the collaborative manufacturing processes driving the growth of Google and other

Straight, Aaron

369

Sodium and sulfur release and recapture during black liquor burning  

DOE Green Energy (OSTI)

The objective of this study was to provide data on sulfur and sodium volatilization during black liquor burning, and on SO2 capture by solid sodium carbonate and sodium chloride. This data was interpreted and modeled into rate equations suitable for use in computational models for recovery boilers.

Frederick, W.J.; Iisa, K.; Wag, K.; Reis, V.V.; Boonsongsup, L.; Forssen, M.; Hupa, M.

1995-08-01T23:59:59.000Z

370

Micro-Mixing Lean-Premix System for Ultra-Low Emission Hydrogen/Syngas Combustion  

DOE Green Energy (OSTI)

The focus of this project was to develop the next generation of fuel injection technologies for environmentally friendly, hydrogen syngas combustion in gas turbine engines that satisfy DOE's objectives of reducing NOx emissions to 3 ppm. Building on Parker Hannifin's proven Macrolamination technology for liquid fuels, Parker developed a scalable high-performing multi-point injector that utilizes multiple, small mixing cups in place of a single conventional large-scale premixer. Due to the small size, fuel and air mix rapidly within the cups, providing a well-premixed fuel-air mixture at the cup exit in a short time. Detailed studies and experimentation with single-cup micro-mixing injectors were conducted to elucidate the effects of various injector design attributes and operating conditions on combustion efficiency, lean stability and emissions and strategies were developed to mitigate the impact of flashback. In the final phase of the program, a full-scale 1.3-MWth multi-cup injector was built and tested at pressures from 6.9bar (100psi) to 12.4bar (180psi) and flame temperatures up to 2000K (3150 F) using mixtures of hydrogen and natural gas as fuel with nitrogen and carbon dioxide as diluents. The injector operated without flash back on fuel mixtures ranging from 100% natural gas to 100% hydrogen and emissions were shown to be insensitive to combustor pressure. NOx emissions of 3-ppm were achieved at a flame temperature of 1750K (2690 F) when operating on a fuel mixture containing 50% hydrogen and 50% natural gas by volume with 40% nitrogen dilution and 1.5-ppm NOx was achieved at a flame temperature of 1680K (2564 F) using only 10% nitrogen dilution. NOx emissions of 3.5-ppm were demonstrated at a flame temperature of 1730K (2650 F) with only 10% carbon dioxide dilution. Finally, 3.6-ppm NOx emissions were demonstrated at a flame temperature over 1600K (2420 F) when operating on 100% hydrogen fuel with 30% carbon dioxide dilution. Superior operability was demonstrated for the hydrogen-natural gas fuel. The micro-mixing fuel injectors show great promise for use in future gas turbine engines operating on hydrogen, syngas or other fuel mixtures of various compositions, supporting the Department of Energy goals related to increased energy diversity while reducing greenhouse gases.

Erlendur Steinthorsson; Brian Hollon; Adel Mansour

2010-06-30T23:59:59.000Z

371

Time parallelization of advanced operation scenario simulations of ITER plasma  

Science Conference Proceedings (OSTI)

This work demonstrates that simulations of advanced burning plasma operation scenarios can be successfully parallelized in time using the parareal algorithm. CORSICA - an advanced operation scenario code for tokamak plasmas is used as a test case. This is a unique application since the parareal algorithm has so far been applied to relatively much simpler systems except for the case of turbulence. In the present application, a computational gain of an order of magnitude has been achieved which is extremely promising. A successful implementation of the Parareal algorithm to codes like CORSICA ushers in the possibility of time efficient simulations of ITER plasmas.

Samaddar, D. [ITER Organization, Saint Paul Lez Durance, France; Casper, T. A. [Lawrence Livermore National Laboratory (LLNL); Kim, S. H. [ITER Organization, Saint Paul Lez Durance, France; Berry, Lee A [ORNL; Elwasif, Wael R [ORNL; Batchelor, Donald B [ORNL; Houlberg, Wayne A [ORNL

2013-01-01T23:59:59.000Z

372

Electron Dynamics of Silicon Surface States: Second-Harmonic Hole Burning on Si(111)7x7  

E-Print Network (OSTI)

States: Second-Harmonic Hole Burning on Si(111) 7× 7 John A.transient spectral hole burning. Spectral holes induced by atransient spectral hole burning, i.e. , the surface-speci?c

McGuire, John A.; Raschke, Markus B.; Shen, Yuen-Ron

2005-01-01T23:59:59.000Z

373

Physical and Chemical Characterization of Particulate and Gas phase Emissions from Biomass Burning  

E-Print Network (OSTI)

during the open combustion of biomass in the laboratory, J.J. R. , and Veres, P. : Biomass burning in Siberia andOpen burning of agricultural biomass: Physical and chemical

Hosseini, Seyedehsan

2012-01-01T23:59:59.000Z

374

Spatial hole burning in actively mode-locked quantum cascade lasers  

E-Print Network (OSTI)

A theoretical study of active mode-locking in quantum cascade lasers including spatial hole-burning is presented. It is found that spatial hole-burning reduces the pulse duration at the expense of slight pulse instability ...

Kartner, Franz X.

375

Department of Industrial and Manufacturing Engineering Fall 2012 Automation of Test Sample Burning  

E-Print Network (OSTI)

Sample Burning Overview ArcelorMittal Steelton produces multiple grades of steel rail. Their operators's burning station by creating a safer process for cutting test-sample premium rails To design a system

Demirel, Melik C.

376

MODIS Reflectance and Active Fire Data for Burn Mapping in Colombia  

Science Conference Proceedings (OSTI)

Satellite-based strategies for burned area mapping may rely on two types of remotely sensed data: postfire reflectance images and active fire detection. This study uses both methods in a synergistic way. In particular, burned area mapping is ...

Silvia Merino-de-Miguel; Federico González-Alonso; Margarita Huesca; Dolors Armenteras; Carol Franco

2011-02-01T23:59:59.000Z

377

SIDA DemoEast programme in Estonia. Supply, delivery and installation of wood pellet burning equipment  

E-Print Network (OSTI)

burning equipment SUMMARY DemoEast programme is a part of Baltic Billion Fund 2 with the overall aim and Kiltsi light oil fired boilers have been converted to wood pellets burning. The supplier

378

Open Questions in Stellar Helium Burning Addressed With Real Photons  

E-Print Network (OSTI)

The outcome of helium burning is the formation of the two elements, carbon and oxygen. The ratio of carbon to oxygen at the end of helium burning is crucial for understanding the final fate of a progenitor star and the nucleosynthesis of heavy elements in Type II supernova, with oxygen rich star predicted to collapse to a black hole, and a carbon rich star to a neutron star. Type Ia supernovae (SNeIa) are used as standard candles for measuring cosmological distances with the use of an empirical light curve-luminosity stretching factor. It is essential to understand helium burning that yields the carbon/oxygen white dwarf and thus the initial stage of SNeIa. Since the triple alpha-particle capture reaction, $^{8}Be(\\alpha,\\gamma)^{12}C$, the first burning stage in helium burning, is well understood, one must extract the cross section of the $^{12}C(\\alpha,\\gamma)^{16}O$ reaction at the Gamow window (300 keV) with high accuracy of approximately 10% or better. This goal has not been achieved despite repeated strong statements that appeared in the literature. In particular constraint from the beta-delayed alpha-particle emission of $^{16}N$ were shown to not sufficiently restrict the p-wave cross section factor; e.g. a low value of $S_{E1}(300)$ can not be ruled out. Measurements at low energies, are thus mandatory for determining the elusive cross section factor for the $^{12}C(\\alpha,\\gamma)^{16}O$ reaction. We are constructing a Time Projection Chamber (TPC) for use with high intensity photon beams extracted from the HI$\\gamma$S/TUNL facility at Duke University to study the $^{16}O(\\gamma,\\alpha)^{12}C$ reaction, and thus the direct reaction at energies as low as 0.7 MeV. This work is in progress.

Moshe Gai

2003-03-20T23:59:59.000Z

379

Effect of inactive impurities on the burning of ICF targets  

Science Conference Proceedings (OSTI)

The efficiency of thermonuclear burning of the spherical deuterium-tritium (DT) plasma of inertial confinement fusion (ICF) targets in the presence of low-Z impurities (such as lithium, carbon, or beryllium) with arbitrary concentrations is investigated. The effect of impurities produced due to the mixing of the thermonuclear fuel with the material of the structural elements of the target during its compression on the process of target burning is studied, and the possibility of using solid noncryogenic thermonuclear fuels in ICF targets is analyzed. Analytical dependences of the ignition energy and target thermonuclear gain on the impurity concentration are obtained. The models are constructed for homogeneous and inhomogeneous plasmas for the case in which the burning is initiated in the central heated region of the target and then propagates into the surrounding relatively cold fuel. Two possible configurations of an inhomogeneous plasma, namely, an isobaric configuration formed in the case of spark ignition of the target and an isochoric configuration formed in the case of fast ignition, are considered. The results of numerical simulations of the burning of the DT plasma of ICF targets in a wide range of impurity concentrations are presented. The simulations were performed using the TEPA one-dimensional code, in which the thermonuclear burning kinetics is calculated by the Monte Carlo method. It is shown that the strongest negative effect related to the presence of impurities is an increase in the energy of target ignition. It is substantiated that the most promising solid noncryogenic fuel is DT hydride of beryllium (BeDT). The requirements to the plasma parameters at which BeDT can be used as a fuel in noncryogenic ICF targets are determined. Variants of using noncryogenic targets with a solid thermonuclear fuel are proposed.

Gus'kov, S. Yu. [Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation); Il'in, D. V.; Sherman, V. E. [St. Petersburg State Engineering Institute (Russian Federation)

2011-12-15T23:59:59.000Z

380

Advanced coal-fueled gas turbine systems  

SciTech Connect

Several technology advances since the early coal-fueled turbine programs that address technical issues of coal as a turbine fuel have been developed in the early 1980s: Coal-water suspensions as fuel form, improved methods for removing ash and contaminants from coal, staged combustion for reducing NO{sub x} emissions from fuel-bound nitrogen, and greater understanding of deposition/erosion/corrosion and their control. Several Advanced Coal-Fueled Gas Turbine Systems programs were awarded to gas turbine manufacturers for for components development and proof of concept tests; one of these was Allison. Tests were conducted in a subscale coal combustion facility and a full-scale facility operating a coal combustor sized to the Allison Model 501-K industrial turbine. A rich-quench-lean (RQL), low nitrogen oxide combustor design incorporating hot gas cleanup was developed for coal fuels; this should also be applicable to biomass, etc. The combustor tests showed NO{sub x} and CO emissions {le} levels for turbines operating with natural gas. Water washing of vanes from the turbine removed the deposits. Systems and economic evaluations identified two possible applications for RQL turbines: Cogeneration plants based on Allison 501-K turbine (output 3.7 MW(e), 23,000 lbs/hr steam) and combined cycle power plants based on 50 MW or larger gas turbines. Coal-fueled cogeneration plant configurations were defined and evaluated for site specific factors. A coal-fueled turbine combined cycle plant design was identified which is simple, compact, and results in lower capital cost, with comparable efficiency and low emissions relative to other coal technologies (gasification, advanced PFBC).

Wenglarz, R.A.

1994-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" 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

Excitation energy transfer in natural photosynthetic complexes and chlorophyll trefoils: hole-burning and single complex/trefoil spectroscopic studies  

SciTech Connect

In this project we studied both natural photosynthetic antenna complexes and various artificial systems (e.g. chlorophyll (Chl) trefoils) using high resolution hole-burning (HB) spectroscopy and excitonic calculations. Results obtained provided more insight into the electronic (excitonic) structure, inhomogeneity, electron-phonon coupling strength, vibrational frequencies, and excitation energy (or electron) transfer (EET) processes in several antennas and reaction centers. For example, our recent work provided important constraints and parameters for more advanced excitonic calculations of CP43, CP47, and PSII core complexes. Improved theoretical description of HB spectra for various model systems offers new insight into the excitonic structure and composition of low-energy absorption traps in very several antenna protein complexes and reaction centers. We anticipate that better understanding of HB spectra obtained for various photosynthetic complexes and their simultaneous fits with other optical spectra (i.e. absorption, emission, and circular dichroism spectra) provides more insight into the underlying electronic structures of these important biological systems. Our recent progress provides a necessary framework for probing the electronic structure of these systems via Hole Burning Spectroscopy. For example, we have shown that the theoretical description of non-resonant holes is more restrictive (in terms of possible site energies) than those of absorption and emission spectra. We have demonstrated that simultaneous description of linear optical spectra along with HB spectra provides more realistic site energies. We have also developed new algorithms to describe both nonresonant and resonant hole-burn spectra using more advanced Redfield theory. Simultaneous description of various optical spectra for complex biological system, e.g. artificial antenna systems, FMO protein complexes, water soluble protein complexes, and various mutants of reaction centers continues; this work is supported by the new DOE BES grant.

Ryszard Jankowiak, Kansas State University, Department of Chemistry, CBC Bldg., Manhattan KS, 66505; Phone: (785) 532-6785

2012-09-12T23:59:59.000Z

382

Major Conclusions of the MFE Study 1. Why a burning plasma Navratil  

E-Print Network (OSTI)

of scientific maturity that we are ready to undertake the essential step of burning plasma research. · Present

383

Predictability of carbon emissions from biomass burning in Indonesia from 1997 to 2006  

E-Print Network (OSTI)

Predictability of carbon emissions from biomass burning in Indonesia from 1997 to 2006 Robert D biomass burning C emissions in Indonesia for 1997­2006, obtained from the Global Fire Emissions Database), Predictability of carbon emissions from biomass burning in Indonesia from 1997 to 2006, J. Geophys. Res., 113, G

Field, Robert

384

SAE Paper 2004-01-2936 Molecular Structure Effects On Laminar Burning Velocities At  

E-Print Network (OSTI)

1 SAE Paper 2004-01-2936 Molecular Structure Effects On Laminar Burning Velocities At Elevated and Engineering Copyright © 2004 Society of Automotive Engineers, Inc ABSTRACT The laminar burning velocities and pressure of 304 kPa. Data have been acquired over the stoichiometry range of 0.55 1.4. The burning

Androulakis, Ioannis (Yannis)

385

Biomass burning emission inventory with daily resolution: Application to aircraft observations of Asian outflow  

E-Print Network (OSTI)

Biomass burning emission inventory with daily resolution: Application to aircraft observations for biomass burning using AVHRR satellite observations of fire activity corrected for data gaps and scan angle biomass burning in SE Asia was a major contributor to the outflow of Asian pollution observed in TRACE

Palmer, Paul

386

Abstract The savannas (cerrado) of south-central Brazil are currently subjected to frequent anthropogenic burning,  

E-Print Network (OSTI)

anthropogenic burning, causing widespread reduction in tree density. Increasing concentrations of atmospheric CO2 could reduce the im- pact of such frequent burning by increasing the availabili- ty CO2 and at two nutrient levels. To simulate burning, the plants were either clipped at 15 weeks

Jackson, Robert B.

387

CANDLE BURNING IN AN INVERTED JAR OVER WATER IN A TROUGH EXPERIMENT: SCIENCE TEACHERS' CONCEPTIONS  

E-Print Network (OSTI)

CANDLE BURNING IN AN INVERTED JAR OVER WATER IN A TROUGH EXPERIMENT: SCIENCE TEACHERS' CONCEPTIONS contains about 20% oxygen despite our knowledge that burning in a closed environment does not consume during burning of carbon in oxygen (air) and the solubility rate of carbon dioxide in water

Knill, Oliver

388

Evolution of biomass burning aerosol properties from an agricultural fire in southern Africa  

E-Print Network (OSTI)

Evolution of biomass burning aerosol properties from an agricultural fire in southern Africa Steven Met Office C-130 within a distinct biomass burning plume during the Southern AFricAn Regional science, and P. R. Buseck, Evolution of biomass burning aerosol properties from an agricultural fire in southern

Highwood, Ellie

389

IEA Workshop (W60) on Burning Plasmas and Simulation Name Institute Speaker/ C Title talk  

E-Print Network (OSTI)

IEA Workshop (W60) on Burning Plasmas and Simulation Name Institute Speaker/ C Title talk Start End 04-Jul-05 Session 1 Transport and Confinement in Burning Plasmas 8.30 8.40 Miura Y. JAERI- Naka chair Experiments on JET 10.00 10.20 Peng M. PPPL speaker NSTX Results relevant for Burning Plasmas 10.20 10

390

1 | Barbecues and Open Burning, September 2010 UC SANTA BARBARA POLICY AND PROCEDURE  

E-Print Network (OSTI)

1 | Barbecues and Open Burning, September 2010 UC SANTA BARBARA POLICY AND PROCEDURE Barbecues and Open Burning Contact: Environmental Health and Safety, Campus Fire Marshal/Designee Updated: September 2, 2010 Supersedes: Burning and Open Fires on UCSB Property, February 1, 1985 Pages: 2 BARBECUES

391

Burning Forest Residues231 Corstorphine Road www.forestry.gov.uk  

E-Print Network (OSTI)

1 Burning Forest Residues231 Corstorphine Road Edinburgh EH12 7AT www.forestry.gov.uk S E P T E M B E R 2 0 0 2 FCTN004 SUMMARY Burning forest residues is a traditional method of ground clearance following harvesting operations. Guidance is given on suitable types of cut material for burning, equipment

392

Affordable Near-Term Burning-Plasma Experiments Dale M. Meade and Robert D. Woolley  

E-Print Network (OSTI)

Affordable Near-Term Burning-Plasma Experiments Dale M. Meade and Robert D. Woolley Princeton more than one, where the dynamics of a burning plasma can be studied, optimized and understood so must be developed within the next decade that will lead to an Affordable Burning Plasma Experiment

393

Tundra burning in Alaska: Linkages to climatic change and sea ice retreat  

E-Print Network (OSTI)

Tundra burning in Alaska: Linkages to climatic change and sea ice retreat Feng Sheng Hu,1 Philip E record. Tundra burning is potentially one such component. Here we report paleoecological evidence showing that recent tundra burning is unprecedented in the central Alaskan Arctic within the last 5000 years. Analysis

Hu, Feng Sheng

394

Nuclear quadrupole resonance of an electronically excited state from high-resolution hole-burning spectroscopy  

E-Print Network (OSTI)

Nuclear quadrupole resonance of an electronically excited state from high-resolution hole-burning 2003; published 5 May 2003 Hole-burning spectroscopy can eliminate inhomogeneous broadening and thereby, the homogeneous linewidth is often small compared to the splittings due to nuclear-spin interactions. Hole-burning

Suter, Dieter

395

RH: Burning index in Los Angeles A Note on Non-parametric and Semi-parametric  

E-Print Network (OSTI)

1 RH: Burning index in Los Angeles A Note on Non-parametric and Semi-parametric Modeling for comparative purposes in order to assess the predictive performance of the Burning Index. 1 Department including the Burning Index (BI) at each of various Remote Automated Weather Stations (RAWS) in the United

Schoenberg, Frederic Paik (Rick)

396

Prescribed Burning Costs: Trends and Influences in the National Forest System1  

E-Print Network (OSTI)

Prescribed Burning Costs: Trends and Influences in the National Forest System1 David A. Cleaves,2 Service's National Forest System prescribed burning activity and costs are examined. Fuels management officers from 95 National Forests reported costs and acreage burned for 4 types of prescribed fire

Standiford, Richard B.

397

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

398

Direct and semi-direct aerosol effects of Southern African1 biomass burning aerosol2  

E-Print Network (OSTI)

1 Direct and semi-direct aerosol effects of Southern African1 biomass burning aerosol2 Naoko effects of biomass burning aerosols from Southern African fires9 during July-October are investigated region the overall TOA radiative effect from the23 biomass burning aerosols is almost zero due

Wood, Robert

399

Thank you for your interest in Fire Prevention! Burning Ban Flags  

E-Print Network (OSTI)

Thank you for your interest in Fire Prevention! Burning Ban Flags Texas A&M Forest Service image to the public, a signal to stop outdoor burning and begin conserving water. They are sold on outdoor burning as a wildfire prevention tool. To support this prevention effort, TFS posts a list

400

Forest Service -U.S. Department of Agriculture Prescribed Burning in the  

E-Print Network (OSTI)

Forest Service - U.S. Department of Agriculture Prescribed Burning in the Interior Ponderosa Pine, California 94701 #12;Gordon, Donald T. 1967. Prescribed burning in the interior ponderosa pine type., illus. (U. S. Forest Serv. Res. Paper PSW- 45 ) Three prescribed burns, made in 1959-62, in the in

Standiford, Richard B.

Note: This page contains sample records for the topic "advanced lean burn" 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

Direct and semidirect aerosol effects of southern African biomass burning aerosol  

E-Print Network (OSTI)

Direct and semidirect aerosol effects of southern African biomass burning aerosol Naoko Sakaeda,1 2011; published 21 June 2011. [1] Direct and semidirect radiative effects of biomass burning aerosols static stability. Over the entire region the overall TOA radiative effect from the biomass burning

Wood, Robert

402

Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame  

E-Print Network (OSTI)

Flames in Type Ia Supernova: Deflagration-Detonation Transition in the Oxygen Burning Flame S. E structure which, de- pending on density, may involve separate regions of carbon, oxygen and silicon burning, all propagating in a self-similar, subsonic front. The separation between these three burning regions

403

Impact of prescribed burning on endophytic insect communities of prairie perennials (Asteraceae  

E-Print Network (OSTI)

Impact of prescribed burning on endophytic insect communities of prairie perennials (Asteraceae, Eurytomidae, Fire, Mordellidae, Population dynamics Abstract. Prescribed burning currently is used to preserve changes in plant communities brought about by burning, other species that are endemic to prairies may

Hanks, Lawrence M.

404

Second UFA Workshop on Burning Plasmas Experimental Approaches, Issues and Opportunities  

E-Print Network (OSTI)

Second UFA Workshop on Burning Plasmas Experimental Approaches, Issues and Opportunities R. Parker UFA Burning Plasma Workshop 1 May 2001 Why Are We Here? R. Parker Program Committee Chairman #12;Second UFA Workshop on Burning Plasmas Experimental Approaches, Issues and Opportunities R. Parker UFA

405

Chengdu 10/18/2006 Theory of Alfvn waves and energetic particle physics in burning plasmas  

E-Print Network (OSTI)

Chengdu 10/18/2006 Theory of Alfvén waves and energetic particle physics in burning plasmas 1 IAEA FEC 2006 Liu Chen Theory of Alfvén waves and energetic particle physics in burning plasmas* 21.st IAEA and energetic particle physics in burning plasmas 2 IAEA FEC 2006 Liu Chen Outlines (I) Introduction (II) Linear

406

Bulk Burning Rate in Passive Reactive Diffusion. Peter Constantin Alexander Kiselev Adam Oberman  

E-Print Network (OSTI)

Bulk Burning Rate in Passive ­ Reactive Diffusion. Peter Constantin Alexander Kiselev Adam Oberman, diffuses, and reacts according to a KPP­type nonlinear reaction. We introduce a quantity, the bulk burning­defined notion of front speed. We establish rigorous lower bounds for the bulk burning rate that are linear

Ryzhik, Lenya

407

UPDATED: Energy Department Announces New Advance in Biofuel Technology |  

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

UPDATED: Energy Department Announces New Advance in Biofuel UPDATED: Energy Department Announces New Advance in Biofuel Technology UPDATED: Energy Department Announces New Advance in Biofuel Technology March 7, 2011 - 12:00am Addthis U.S. Energy Secretary Steven Chu today congratulated a team of researchers at the Department's BioEnergy Science Center who have achieved yet another advance in the drive toward next generation biofuels: using bacteria to convert plant matter directly into isobutanol, which can be burned in regular car engines with a heat value higher than ethanol and similar to gasoline. This research is part of a broad portfolio of work the Department is doing to reduce America's dependence on foreign oil and create new economic opportunities for rural America. "Today's announcement is yet another sign of the rapid progress we are

408

II.AdvancedTcl Advanced Tcl  

E-Print Network (OSTI)

119 P A R T II.AdvancedTcl II Advanced Tcl Part II describes advanced programming techniques that support sophisticated applications. The Tcl interfaces remain simple, so you can quickly construct pow- erful applications. Chapter 10 describes eval, which lets you create Tcl programs on the fly

Chen, Yuanzhu Peter

409

Coated Particle Fuel and Deep Burn Program Monthly Highlights April 2011  

SciTech Connect

The baseline change proposal BCP-FCRD-11026 submitted to change the due date for M21AF080202 'Demonstrate fabrication of Transuranic kernels of Plutonium-239/3.5at%Neptunium-237 using newly installed glove box facilities in ORNL 7930 hot cell complex' from 4/25/11 to 3/30/12 was approved this month. During FY 2011 the CP & DB Program will report Highlights on a monthly basis, but will no longer produce Quarterly Progress Reports. Technical details that were previously included in the quarterly reports will be included in the appropriate Milestone Reports that are submitted to FCRD Program Management. These reports will also be uploaded to the Deep Burn website. The Monthly Highlights report for March 2011, ORNL/TM-2011/96, was distributed to program participants on April 8, 2011. As reported previously, the final Quarterly for FY 2010, Deep Burn Program Quarterly Report for July - September 2010, ORNL/TM-2010/301, was announced to program participants and posted to the website on December 28, 2010. This report discusses the following: (1) Thermochemical Data and Model Development - (a) Thermochemical Modeling, (b) Thermomechanical Behavior, (c) Actinide and Fission Product Transport, (d) Radiation Damage and Properties; (2) TRU (transuranic elements) TRISO (tri-structural isotropic) Development - (a) TRU Kernel Development, (b) Coating Development; (3) Advanced TRISO Applications - Metal Matrix Fuels for LWR; (4) LWR Fully Ceramic Fuel - (a) FCM Fabrication Development, (b) FCM Irradiation Testing; (5) Fuel Performance and Analytical Analysis - Fuel Performance Modeling; and (6) ZrC Properties and Handbook - Properties of ZrC.

Snead, Lance Lewis [ORNL; Bell, Gary L [ORNL; Besmann, Theodore M [ORNL

2011-05-01T23:59:59.000Z

410

Alternative and Advanced Fuels  

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

There are a variety of alternative and advanced fuels available, which are used to fuel alternative and advanced vehicles. Learn more about:

411

Help - Advanced Search  

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

Advanced Search The advanced search form will help you create a more specific search in the Publications database. First, specify your search criteria. You can search by author,...

412

Kleinman 2013 Biomass Burn Plan B.ppt  

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

if There are Few Fires? if There are Few Fires? Fire Plan Major focus is to sample fires in near-field where there are rapid changes, with a particular emphasis on soot, brown carbon, and SOA This includes sampling other sources for contrast Urban, Long range transport Plan B Same instruments can be used for multiple purposes Year to Year Burn Variability Fire Data from FINN version 1.0, courtesy of Christine Wiedinmyer Areas are ~ 1000 km by 1000 km centered on Pasco, WA and Little Rock, AK Year to year variability in Monthly Fire Emissions ~ factor of 10. Year to Year Burn Variability Fire Data from FINN version 1.0, courtesy of Christine Wiedinmyer Large year to year variability in Fire Counts Sometimes, 2 week periods between fire activity Other Soot/Brown Carbon Sources

413

NETL: News Release - Combustion Optimization Systems - Cleaner Coal Burning  

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

"Combustion Optimization System" - Cleaner Coal Burning at Lower Costs "Combustion Optimization System" - Cleaner Coal Burning at Lower Costs DOE Joins with Sunflower Electric to Outfit Kansas Coal Plant with Lower Cost System to Cut Air Emissions FINNEY COUNTY, KS - A unique combination of high-tech combustion modifications and sophisticated control systems will be tested on a Kansas coal-fired power plant as part of the federal government's efforts to show how new technology can reduce air emissions and save costs for ratepayers. - Sunflower Electric's Holcomb Station - Sunflower Electric's Holcomb Station will be outfitted with a combination of innovative hardware and software to further reduce air emissions. - The U.S. Department of Energy and Sunflower Electric Power Corporation have signed an agreement to use the utility's Holcomb Station power plant in

414

HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation  

Science Conference Proceedings (OSTI)

HERMES (High Explosive Response to MEchanical Stimulus) was developed to fill the need for a model to describe an explosive response of the type described as BVR (Burn to Violent Response) or HEVR (High Explosive Violent Response). Characteristically this response leaves a substantial amount of explosive unconsumed, the time to reaction is long, and the peak pressure developed is low. In contrast, detonations characteristically consume all explosive present, the time to reaction is short, and peak pressures are high. However, most of the previous models to describe explosive response were models for detonation. The earliest models to describe the response of explosives to mechanical stimulus in computer simulations were applied to intentional detonation (performance) of nearly ideal explosives. In this case, an ideal explosive is one with a vanishingly small reaction zone. A detonation is supersonic with respect to the undetonated explosive (reactant). The reactant cannot respond to the pressure of the detonation before the detonation front arrives, so the precise compressibility of the reactant does not matter. Further, the mesh sizes that were practical for the computer resources then available were large with respect to the reaction zone. As a result, methods then used to model detonations, known as {beta}-burn or program burn, were not intended to resolve the structure of the reaction zone. Instead, these methods spread the detonation front over a few finite-difference zones, in the same spirit that artificial viscosity is used to spread the shock front in inert materials over a few finite-difference zones. These methods are still widely used when the structure of the reaction zone and the build-up to detonation are unimportant. Later detonation models resolved the reaction zone. These models were applied both to performance, particularly as it is affected by the size of the charge, and to situations in which the stimulus was less than that needed for reliable performance, whether as a result of accident, hazard, or a fault in the detonation train. These models describe the build-up of detonation from a shock stimulus. They are generally consistent with the mesoscale picture of ignition at many small defects in the plane of the shock front and the growth of the resulting hot-spots, leading to detonation in heterogeneous explosives such as plastic-bonded explosives (PBX). The models included terms for ignition, and also for the growth of reaction as tracked by the local mass fraction of product gas, {lambda}. The growth of reaction in such models incorporates a form factor that describes the change of surface area per unit volume (specific surface area) as the reaction progresses. For unimolecular crystalline-based explosives, the form factor is consistent with the mesoscale picture of a galaxy of hot spots burning outward and eventually interacting with each other. For composite explosives and propellants, where the fuel and oxidizer are segregated, the diffusion flame at the fuel-oxidizer interface can be interpreted with a different form factor that corresponds to grains burning inward from their surfaces. The form factor influences the energy release rate, and the amount of energy released in the reaction zone. Since the 19th century, gun and cannon propellants have used perforated geometric shapes that produce an increasing surface area as the propellant burns. This helps maintain the pressure as burning continues while the projectile travels down the barrel, which thereby increases the volume of the hot gas. Interior ballistics calculations use a geometric form factor to describe the changing surface area precisely. As a result, with a suitably modified form factor, detonation models can represent burning and explosion in damaged and broken reactant. The disadvantage of such models in application to accidents is that the ignition term does not distinguish between a value of pressure that results from a shock, and the same pressure that results from a more gradual increase. This disagrees with experiments, where

Reaugh, J E

2011-11-22T23:59:59.000Z

415

HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation  

SciTech Connect

HERMES (High Explosive Response to MEchanical Stimulus) was developed to fill the need for a model to describe an explosive response of the type described as BVR (Burn to Violent Response) or HEVR (High Explosive Violent Response). Characteristically this response leaves a substantial amount of explosive unconsumed, the time to reaction is long, and the peak pressure developed is low. In contrast, detonations characteristically consume all explosive present, the time to reaction is short, and peak pressures are high. However, most of the previous models to describe explosive response were models for detonation. The earliest models to describe the response of explosives to mechanical stimulus in computer simulations were applied to intentional detonation (performance) of nearly ideal explosives. In this case, an ideal explosive is one with a vanishingly small reaction zone. A detonation is supersonic with respect to the undetonated explosive (reactant). The reactant cannot respond to the pressure of the detonation before the detonation front arrives, so the precise compressibility of the reactant does not matter. Further, the mesh sizes that were practical for the computer resources then available were large with respect to the reaction zone. As a result, methods then used to model detonations, known as {beta}-burn or program burn, were not intended to resolve the structure of the reaction zone. Instead, these methods spread the detonation front over a few finite-difference zones, in the same spirit that artificial viscosity is used to spread the shock front in inert materials over a few finite-difference zones. These methods are still widely used when the structure of the reaction zone and the build-up to detonation are unimportant. Later detonation models resolved the reaction zone. These models were applied both to performance, particularly as it is affected by the size of the charge, and to situations in which the stimulus was less than that needed for reliable performance, whether as a result of accident, hazard, or a fault in the detonation train. These models describe the build-up of detonation from a shock stimulus. They are generally consistent with the mesoscale picture of ignition at many small defects in the plane of the shock front and the growth of the resulting hot-spots, leading to detonation in heterogeneous explosives such as plastic-bonded explosives (PBX). The models included terms for ignition, and also for the growth of reaction as tracked by the local mass fraction of product gas, {lambda}. The growth of reaction in such models incorporates a form factor that describes the change of surface area per unit volume (specific surface area) as the reaction progresses. For unimolecular crystalline-based explosives, the form factor is consistent with the mesoscale picture of a galaxy of hot spots burning outward and eventually interacting with each other. For composite explosives and propellants, where the fuel and oxidizer are segregated, the diffusion flame at the fuel-oxidizer interface can be interpreted with a different form factor that corresponds to grains burning inward from their surfaces. The form factor influences the energy release rate, and the amount of energy released in the reaction zone. Since the 19th century, gun and cannon propellants have used perforated geometric shapes that produce an increasing surface area as the propellant burns. This helps maintain the pressure as burning continues while the projectile travels down the barrel, which thereby increases the volume of the hot gas. Interior ballistics calculations use a geometric form factor to describe the changing surface area precisely. As a result, with a suitably modified form factor, detonation models can represent burning and explosion in damaged and broken reactant. The disadvantage of such models in application to accidents is that the ignition term does not distinguish between a value of pressure that results from a shock, and the same pressure that results from a more gradual increase. This disagrees with experiments, where

Reaugh, J E

2011-11-22T23:59:59.000Z

416

Type Ia Supernova: Burning and Detonation in the Distributed Regime  

E-Print Network (OSTI)

A simple, semi-analytic representation is developed for nuclear burning in Type Ia supernovae in the special case where turbulent eddies completely disrupt the flame. The speed and width of the ``distributed'' flame front are derived. For the conditions considered, the burning front can be considered as a turbulent flame brush composed of corrugated sheets of well-mixed flames. These flames are assumed to have a quasi-steady-state structure similar to the laminar flame structure, but controlled by turbulent diffusion. Detonations cannot appear in the system as long as distributed flames are still quasi-steady-state, but this condition is violated when the distributed flame width becomes comparable to the size of largest turbulent eddies. When this happens, a transition to detonation may occur. For current best estimates of the turbulent energy, the most likely density for the transition to detonation is in the range 0.5 - 1.5 x 10^7 g cm^{-3}.

S. E. Woosley

2007-09-26T23:59:59.000Z

417

Affordable Near-term Burning-plasma Experiments  

SciTech Connect

Fusion energy is a potential energy source for the future with plentiful fuel supplies and is expected to have benign environmental impact. The issue with fusion energy has been the scientific feasibility, and recently the cost of this approach. The key technical milestone for fusion is the achievement of a self-sustained fusion fire, ignition, in the laboratory. Despite 40 years of research and the expenditure of almost $20B worldwide, a self-sustained fusion fire has not yet been produced in the laboratory. The fusion program needs a test bed, preferably more than one, where the dynamics of a burning plasma can be studied, optimized and understood so that the engineering requirements for an engineering test reactor can be determined. Engineering and physics concepts must be developed within the next decade that will lead to an Affordable Burning Plasma Experiment if fusion is going to be perceived as making progress toward a potential long-range energy source.

D.M. Meade; R.D. Wooley

1998-04-01T23:59:59.000Z

418

Uniform DT 3T burn: computations and sensitivities  

Science Conference Proceedings (OSTI)

A numerical model was developed in C to integrate the nonlinear deutrium-tritium (DT) burn equations in a three temperature (3T) approximation for spatially uniform test problems relevant to Inertial Confinement Fusion (ICF). Base model results are in excellent agreement with standard 3T results. Data from NDI, SESAME, and TOPS databases is extracted to create fits for the reaction rate parameter, the Planck opacity, and the coupling frequencies of the plasma temperatures. The impact of different fits (e.g., TOPS versus SESAME opacity data, higher order polynomial fits ofNDI data for the reaction rate parameter) were explored, and sensitivity to several model inputs are presented including: opacity data base, Coulomb logarithm, and Bremsstrahlung. Sensitivity to numerical integration time step size, and the relative insensitivity to the discretized numerics and numerical integration method was demonstrated. Variations in the IC for densities and temperatures were explored, showing similar DT burn profiles in most cases once ignition occurs. A coefficient multiplying the Compton coupling term (default, A = 1) can be adjusted to approximate results from more sophisticated models. The coefficient was reset (A = 0.4) to match the maximum temperatures resulting from standard multi-group simulations of the base case test problem. Setting the coefficient to a larger value, (A = 0.6) matches maximum ion temperatures in a kinetic simulation of a high density ICF-like regime. Matching peak temperatures does not match entire temperature-time profiles, indicating the Compton coefficient is density and time dependent as the photon distribution evolves. In the early time burn during the ignition of the DT, the present model with modified Compton coupling provides a very simple method to obtain a much improved match to the more accurate solution from the multi-group radiation model for these DT burn regimes.

Vold, Erik [Los Alamos National Laboratory; Hryniw, Natalia [Los Alamos National Laboratory; Hansen, Jon A [Los Alamos National Laboratory; Kesler, Leigh A [Los Alamos National Laboratory; Li, Frank [Los Alamos National Laboratory

2011-01-27T23:59:59.000Z

419

Superheater Corrosion in Plants Burning High-Chlorine Coals  

Science Conference Proceedings (OSTI)

Corrosion caused by molten alkali sulfates can cause premature failure in superheaters and reheaters of coal-fired boilers. Coals with a high chlorine content are more likely to cause molten sulfate corrosion than those with a low chlorine content. Tests in a boiler burning coal with 0.37% chlorine and 1.3% sulfur show that stainless steels with at least 35% chromium are very corrosion resistant, while steels containing less than 20% chromium have high corrosion rates.

1992-12-01T23:59:59.000Z

420

Evolution of the First Stars with Dark Matter Burning  

E-Print Network (OSTI)

Recent theoretical studies have revealed the possibly important role of the capture and annihilation process of weakly interacting massive particles (WIMPs) for the first stars. Using new evolutionary models of metal-free massive stars, we investigate the impact of such ``dark matter burning'' for the first stars in different environments of dark matter (DM) halos, in terms of the ambient WIMP density (rho_chi). We find that, in agreement with existing literature, stellar life times can be significantly prolonged for a certain range of rho_\\chi (i.e., 10^{10} ~ 2*10^{11} GeV/cm3 may not undergo nuclear burning stages, confirming the previous work, and that ionizing photon fluxes from such DM supported stars are very weak. Delayed metal enrichment and slow reionization in the early universe would have resulted if most of the first stars had been born in DM halos with such high rho_\\chi, unless it had been lowered significantly below the threshold for efficient DM burning on a short time scale.

Sung-Chul Yoon; Fabio Iocco; Shizuka Akiyama

2008-06-17T23:59:59.000Z

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


421

PULSATIONS IN HYDROGEN BURNING LOW-MASS HELIUM WHITE DWARFS  

SciTech Connect

Helium core white dwarfs (WDs) with mass M {approx}< 0.20 M {sub sun} undergo several Gyr of stable hydrogen burning as they evolve. We show that in a certain range of WD and hydrogen envelope masses, these WDs may exhibit g-mode pulsations similar to their passively cooling, more massive carbon/oxygen core counterparts, the ZZ Cetis. Our models with stably burning hydrogen envelopes on helium cores yield g-mode periods and period spacings longer than the canonical ZZ Cetis by nearly a factor of 2. We show that core composition and structure can be probed using seismology since the g-mode eigenfunctions predominantly reside in the helium core. Though we have not carried out a fully nonadiabatic stability analysis, the scaling of the thermal time in the convective zone with surface gravity highlights several low-mass helium WDs that should be observed in search of pulsations: NLTT 11748, SDSS J0822+2753, and the companion to PSR J1012+5307. Seismological studies of these He core WDs may prove especially fruitful, as their luminosity is related (via stable hydrogen burning) to the hydrogen envelope mass, which eliminates one model parameter.

Steinfadt, Justin D. R. [Department of Physics, Broida Hall, University of California, Santa Barbara, CA 93106 (United States); Bildsten, Lars [Kavli Institute for Theoretical Physics and Department of Physics, Kohn Hall, University of California, Santa Barbara, CA 93106 (United States); Arras, Phil, E-mail: jdrs@physics.ucsb.ed, E-mail: bildsten@kitp.ucsb.ed, E-mail: arras@virginia.ed [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States)

2010-07-20T23:59:59.000Z

422

Nuclear fusion in dense matter: Reaction rate and carbon burning  

E-Print Network (OSTI)

In this paper we analyze the nuclear fusion rate between equal nuclei for all five different nuclear burning regimes in dense matter (two thermonuclear regimes, two pycnonuclear ones, and the intermediate regime). The rate is determined by Coulomb barrier penetration in dense environments and by the astrophysical S-factor at low energies. We evaluate previous studies of the Coulomb barrier problem and propose a simple phenomenological formula for the reaction rate which covers all cases. The parameters of this formula can be varied, taking into account current theoretical uncertainties in the reaction rate. The results are illustrated for the example of the ^{12}C+^{12}C fusion reaction. This reaction is very important for the understanding of nuclear burning in evolved stars, in exploding white dwarfs producing type Ia supernovae, and in accreting neutron stars. The S-factor at stellar energies depends on a reliable fit and extrapolation of the experimental data. We calculate the energy dependence of the S-factor using a recently developed parameter-free model for the nuclear interaction, taking into account the effects of the Pauli nonlocality. For illustration, we analyze the efficiency of carbon burning in a wide range of densities and temperatures of stellar matter with the emphasis on carbon ignition at densities rho > 10^9 g/cc.

L. R. Gasques; A. V. Afanasjev; E. F. Aguilera; M. Beard; L. C. Chamon; P. Ring; M. Wiescher; D. G. Yakovlev

2005-06-16T23:59:59.000Z

423

Formaldehyde and VOC Emissions from a Siemens-Westinghouse 501F Combustion Turbine with Lean Pre-Mix Combustors and SCR and CO Catalysts  

Science Conference Proceedings (OSTI)

This report presents a summary of flue gas formaldehyde and volatile organic compounds (VOCs) measurements conducted at a Siemens-Westinghouse 501F gas-fired combustion turbine with lean pre-mix low-NOx combustors and selective catalytic reduction (SCR) and carbon monoxide (CO) catalysts.

2004-01-30T23:59:59.000Z

424

Advanced Materials in MML  

Science Conference Proceedings (OSTI)

... Advanced Materials Characterization. Fusion Wall Development Research by Neutron Depth Profiling. < Previous 1 2 3 Next ». ...

2012-06-12T23:59:59.000Z

425

Advanced Microturbine Systems  

SciTech Connect

In July 2000, the United Technologies Research Center (UTRC) was one of five recipients of a US Department of Energy contract under the Advanced Microturbine System (AMS) program managed by the Office of Distributed Energy (DE). The AMS program resulted from several government-industry workshops that recognized that microturbine systems could play an important role in improving customer choice and value for electrical power. That is, the group believed that electrical power could be delivered to customers more efficiently and reliably than the grid if an effective distributed energy strategy was followed. Further, the production of this distributed power would be accomplished with less undesirable pollutants of nitric oxides (NOx) unburned hydrocarbons (UHC), and carbon monoxide (CO). In 2000, the electrical grid delivered energy to US customers at a national average of approximately 32% efficiency. This value reflects a wide range of powerplants, but is dominated by older, coal burning stations that provide approximately 50% of US electrical power. The grid efficiency is also affected by transmission and distribution (T&D) line losses that can be significant during peak power usage. In some locations this loss is estimated to be 15%. Load pockets can also be so constrained that sufficient power cannot be transmitted without requiring the installation of new wires. New T&D can be very expensive and challenging as it is often required in populated regions that do not want above ground wires. While historically grid reliability has satisfied most customers, increasing electronic transactions and the computer-controlled processes of the 'digital economy' demand higher reliability. For them, power outages can be very costly because of transaction, work-in-progress, or perishable commodity losses. Powerplants that produce the grid electrical power emit significant levels of undesirable NOx, UHC, and CO pollutants. The level of emission is quoted as either a technology metric or a system-output metric. A common form for the technology metric is in the units of PPM {at} 15% O2. In this case the metric reflects the molar fraction of the pollutant in the powerplant exhaust when corrected to a standard exhaust condition as containing 15% (molar) oxygen, assuring that the PPM concentrations are not altered by subsequent air addition or dilution. Since fuel combustion consumes oxygen, the output oxygen reference is equivalent to a fuel input reference. Hence, this technology metric reflects the moles of pollutant per mole of fuel input, but not the useful output of the powerplant-i.e. the power. The system-output metric does embrace the useful output and is often termed an output-based metric. A common form for the output-based metric is in the units of lb/MWh. This is a system metric relating the pounds of pollutant to output energy (e.g., MWh) of the powerplant.

Rosfjord, T; Tredway, W; Chen, A; Mulugeta, J; Bhatia, T

2008-12-31T23:59:59.000Z

426

Hydrogen-burn survival: preliminary thermal model and test results  

DOE Green Energy (OSTI)

This report documents preliminary Hydrogen Burn Survival (HBS) Program experimental and analytical work conducted through February 1982. The effects of hydrogen deflagrations on safety-related equipment in nuclear power plant containment buildings are considered. Preliminary results from hydrogen deflagration experiments in the Sandia Variable Geometry Experimental System (VGES) are presented and analytical predictions for these tests are compared and discussed. Analytical estimates of component thermal responses to hydrogen deflagrations in the upper and lower compartments of an ice condenser, pressurized water reactor are also presented.

McCulloch, W.H.; Ratzel, A.C.; Kempka, S.N.; Furgal, D.T.; Aragon, J.J.

1982-08-01T23:59:59.000Z

427

Employing the EPRI Vista Program for Test Burn Risk Assessment  

Science Conference Proceedings (OSTI)

The drive to use fuel switching as a means to meet more stringent SO2 and NOX emissions requirements has in many cases led to both a reduction in power station efficiency and a poorer net plant heat rate (NPHR) at the power station, as well as significant reductions in operating margins and increases in the risk of unit derates. One excellent method to manage or mitigate this risk is a comprehensive test burn for fuels under consideration. The objectives of this technical report are to demonstrate how th...

2011-12-19T23:59:59.000Z

428

Testing of the Burns-Milwaukee`s Sun Oven  

DOE Green Energy (OSTI)

A Burns-Milwaukee Sun Oven was tested at Sandia`s Solar Thermal Test Facility. It was instrumented with five type K thermocouples to determine warm-up rates when empty and when a pot containing two liters of water was placed inside. It reached inside air temperatures above 160{degrees}C (320{degrees}F). It heated two liters of water from room temperatures to 80{degrees}C, (175{degrees}F), in 75 minutes. Observations were also made on the cooling and reheating rates during a cloud passage. The adverse effects of wind on operation of the solar oven was also noted.

Moss, T.A.

1997-03-01T23:59:59.000Z

429

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

430

Solar Proton Burning Process Revisited within a Covariant Model Based on the Bethe-Salpeter Formalism  

E-Print Network (OSTI)

A covariant model based on the Bethe-Salpeter formalism is proposed for investigating the solar proton burning process $pp\\to De^+\

L. P. Kaptari; B. Kämpfer; E. Grosse

2000-01-14T23:59:59.000Z

431

An analysis of terrain roughness: Generating a GIS application for prescribed burning.  

E-Print Network (OSTI)

??Prescribed burning is a technique used to rejuvenate pastures by enhancing wildlife habitat, brush control, and removing old growth. The technique has become a science… (more)

Crawford, Matthew Allan

2008-01-01T23:59:59.000Z

432

"Burning Man was better next year:" a phenomenology of community identity in the Black Rock counterculture.  

E-Print Network (OSTI)

??This study illustrates and explains communal identity performance and maintenance as manifested by the participants in the counterculture community at Burning Man. This community is… (more)

Kehoe, Kara Leeann

2011-01-01T23:59:59.000Z

433

Effects of prescribed burning on undesirable plant species and soil physical properties on tallgrass prairies.  

E-Print Network (OSTI)

??Prescribed burning has been a common conservation practice on native prairie dating back to the days of pioneer settlement. Advantages include increased forage quality, reduction… (more)

Ungerer, James L.

2013-01-01T23:59:59.000Z

434

O-1: Using of Spent Moulding Sands for Production of Burned ...  

Science Conference Proceedings (OSTI)

The measurements of exhaust gases emissions performed during burning the products containing spent moulding sands as well as during the normal ...

435

Nuclear fusion advances  

Science Conference Proceedings (OSTI)

The last decade has seen advances in the shaping and confinement of plasmas, and in approaches to noninductive current drive. Here, the author presents an overview of nuclear fusion advances between 1983-93 examining: fusion milestones; plasma shaping; ...

W. Sweet

1994-02-01T23:59:59.000Z

436

AdvAnced  

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

AdvAnced test reActor At the InL advanced Unlike large, commercial power reactors, ATR is a low- temperature, low-pressure reactor. A nuclear reactor is basically an elaborate tool...

437

Coated Particle and Deep Burn Fuels Monthly Highlights December 2010  

SciTech Connect

During FY 2011 the CP & DB Program will report Highlights on a monthly basis, but will no longer produce Quarterly Progress Reports. Technical details that were previously included in the quarterly reports will be included in the appropriate Milestone Reports that are submitted to FCRD Program Management. These reports will also be uploaded to the Deep Burn website. The Monthly Highlights report for November 2010, ORNL/TM-2010/323, was distributed to program participants on December 9, 2010. The final Quarterly for FY 2010, Deep Burn Program Quarterly Report for July - September 2010, ORNL/TM-2010/301, was announced to program participants and posted to the website on December 28, 2010. This report discusses the following: (1) Thermochemical Data and Model Development - (a) Thermochemical Modeling, (b) Core Design Optimization in the HTR (high temperature helium-cooled reactor) Pebble Bed Design (INL), (c) Radiation Damage and Properties; (2) TRISO (tri-structural isotropic) Development - (a) TRU (transuranic elements) Kernel Development, (b) Coating Development; (3) LWR Fully Ceramic Fuel - (a) FCM Fabrication Development, (b) FCM Irradiation Testing (ORNL); (4) Fuel Performance and Analytical Analysis - Fuel Performance Modeling (ORNL).

Snead, Lance Lewis [ORNL; Bell, Gary L [ORNL; Besmann, Theodore M [ORNL

2011-01-01T23:59:59.000Z

438

Nonphotochemical hole burning of the reaction center of Rhodopseudomonas viridis  

SciTech Connect

Reddy et al. (Science, accepted) have reported persistent, nonphotochemical hole-burned (NPHB) spectra for the Q[sub y] states of the reaction center of Rhodopseudomonas viridis. The photoinduced structural transformation was shown to be highly localized on the special pair. This transformation leads to a red shift of the special pair's lowest-energy absorption band, P960, of 150 cm[sup [minus]1] and a comparable blue shift for a state at 850 nm, which, as a consequence, could be assigned as being most closely associated with the upper dimer component. Additional experimental results are presented here together with a theoretical analysis of the extent to which the NPHB spectra provide information on the contribution from the bacteriochlorophyll monomers of the special pair to the Q[sub y] states that absorb higher in energy than P960. Structured photochemical hole-burned (PHB) spectra of P960 are also presented that underscore the importance of strong electron-phonon coupling from a broad distribution of modes with a mean frequency of 30 cm[sup [minus]1] for an understanding of the P960 absorption profile. These spectra also identify the zero-phonon hole of the strongly damped special pair marker mode (145 cm[sup [minus]1]) and its associated phonon sideband structure. Calculated spectra are presented which are in good agreement with the experimental PHB spectra. 30 refs., 6 figs., 4 tabs.

Reddy, N.R.S.; Kolaczkowski, S.V.; Small, G.J. (Iowa State Univ., Ames, IA (United States))

1993-07-01T23:59:59.000Z

439

Testing of the Burns-Milwaukee's Sun Oven  

E-Print Network (OSTI)

A Burns-Milwaukee Sun Oven was tested at Sandia's Solar Thermal Test Facility. It was instrumented with five type K thermocouples to determine warm-up rates when empty and when a pot containing two liters of water was placed inside. It reached inside air temperatures above 160 o C (320 o F). It heated two liters of water from room temperature to 80 o C, (175 o F), in 75 minutes. Observations were also made on the cooling and reheating rates during a cloud passage. The adverse effects of wind on operation of the solar oven was also noted. ii 1 The Solar Thermal Design Assistance Center (STDAC) at Sandia National Laboratories evaluated a Sun Oven from Burns-Milwaukee at Sandia's Solar Thermal Test Facility in Albuquerque NM. It was designed for single family household cooking. It is targeting developing countries' alternative energy markets where conventional fuels are not available and wood is the primary fuel used for cooking. Because of the wide variety and types of solar...

Moss Solar Thermal; T. A. Moss

1997-01-01T23:59:59.000Z

440

Biogenic and biomass burning sources of acetone to the troposphere  

DOE Green Energy (OSTI)

Acetone may be an important source of reactive odd hydrogen in the upper troposphere and lower stratosphere. This source of odd hydrogen may affect the concentration of a number of species, including ozone, nitrogen oxides, methane, and others. Traditional, acetone had been considered a by-product of the photochemical oxidation of other species, and had not entered models as a primary emission. However, recent work estimates a global source term of 40-60 Tg acetone/year. Of this, 25% is directly emitted during biomass burning, and 20% is directly emitted by evergreens and other plants. Only 3% is due to anthropogenic/industrial emissions. The bulk of the remainder, 51% of the acetone source, is a secondary product from the oxidation of propane, isobutane, and isobutene. Also, while it is speculated that the oxidation of pinene (a biogenic emission) may also contribute about 6 Tg/year, this term is highly uncertain. Thus, the two largest primary sources of acetone are biogenic emission and biomass burning, with industrial/anthropogenic emissions very small in comparison.

Atherton, C.S.

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "advanced lean burn" from the National Library of EnergyBeta (NLEBeta).
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441

A high-porosity limit for the transition from conductive to convective burning in gas-permeable explosives  

SciTech Connect

The experimentally known phenomenon of an abrupt transition from slow conductive to fast convective (penetrative) burning in a confined gas-permeable explosive is discussed. A simple model, involving only the most essential physical ingredients, is formulated and analyzed. In addition to commonly utilized assumptions of the solid-gas thermal equilibrium, validity of Darcy's law, immobility of the solid phase, and one-step Arrhenius kinetics, the model employs the distinguished limit combining high-porosity with high solid/gas density ratio, resulting in conservation of enthalpy, advantageous for theoretical analysis. A good qualitative agreement between theoretical and experimental dependencies is obtained. The transition is triggered by a localized autoignition in the extended resistance-induced preheat zone formed ahead of the advancing deflagration, provided the pressure difference between hot gas products and gases deep inside the pores of the unburned solid exceeds a certain critical level. In line with observations the critical overpressure increases with diminishing permeability. (author)

Kagan, Leonid; Sivashinsky, Gregory [Sackler Faculty of Exact Sciences, School of Mathematical Sciences, Tel Aviv University, Tel Aviv 69978 (Israel)

2010-02-15T23:59:59.000Z

442

ADVANCED DATA SECURITY  

Science Conference Proceedings (OSTI)

ADVANCED DATA SECURITY. NVLAP Lab Code: 200968-0. Address and Contact Information: 1933 O'Toole Avenue San ...

2013-11-08T23:59:59.000Z

443

Fatigue of Advanced Materials  

Science Conference Proceedings (OSTI)

Oct 19, 2011... isolate the internal components from the external environment while ... overall thermal efficiency of advanced internal combustion engines ...

444

Advancement of Electrochromic Windows  

E-Print Network (OSTI)

advanced spectrally selective low-e double-pane windows and the same type of daylighting control system

2006-01-01T23:59:59.000Z

445

Advanced High Frequency Devices  

Science Conference Proceedings (OSTI)

... External agencies, including the Defense Advanced Research Projects Agency (DARPA) and the Office of Naval Research (ONR), have ...

2010-10-05T23:59:59.000Z

446

Supporting Advanced Communications Networks  

Science Conference Proceedings (OSTI)

... it will rely on revolutionary advances in network architecture. ... telemedicine), sensor and control networks (eg, Smart Grid, environmental monitoring ...

2012-02-13T23:59:59.000Z

447

The Effects of Fuel Distribution, Velocity Distribution, and Fuel Composition on Static and Dynamic Instabilities and NOx Emissions in Lean Premixed Combustors  

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

Distribution, and Fuel Composition on Static and Dynamic Instabilities and NO x Emissions in Lean Premixed Combustors Principal Investigator: Domenic A. Santavicca SCIES Project 03-01-SR109 DOE COOPERATIVE AGREEMENT DE-FC26-02NT41431 Tom J. George, Program Manager, DOE/NETL Richard Wenglarz, Manager of Research, SCIES Project Awarded (7/01/03, 36 month duration) $403,777 Total Contract Value ($403,777 DOE) * Lower Emissions * Improved Static and Dynamic Stability * Fuel Versatility * Improved Design Methodology UTSR Workshop,10-18-05,DAS Gas Turbine Technology Needs * to determine the effect of combustor operating conditions on the static and dynamic stability characteristics of lean premixed combustors operating on natural gas and coal-derived syngas fuels * to develop a methodology for predicting the effect of

448

Session: CSP Advanced Systems -- Advanced Overview (Presentation)  

DOE Green Energy (OSTI)

The project description is: (1) it supports crosscutting activities, e.g. advanced optical materials, that aren't tied to a single CSP technology and (2) it supports the 'incubation' of new concepts in preliminary stages of investigation.

Mehos, M.

2008-04-01T23:59:59.000Z

449

Advanced Manufacturing Office: Better Plants  

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

Better Plants on Twitter Bookmark Advanced Manufacturing Office: Better Plants on Google Bookmark Advanced Manufacturing Office: Better Plants on Delicious Rank Advanced...

450

Advanced Manufacturing Office: Pump Systems  

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

Pump Systems on Twitter Bookmark Advanced Manufacturing Office: Pump Systems on Google Bookmark Advanced Manufacturing Office: Pump Systems on Delicious Rank Advanced...

451

Burning state recognition of rotary kiln using ELMs with heterogeneous features  

Science Conference Proceedings (OSTI)

Image based burning state recognition plays an important role in sintering process control of rotary kiln. Although many efforts on dealing with this problem have been made over the past years, the recognition performance cannot be satisfactory due to ... Keywords: Burning state, ELM, Eigen-flame image, Latent semantic analysis, Multivariate image analysis

Weitao Li; Dianhui Wang; Tianyou Chai

2013-02-01T23:59:59.000Z

452

Structured hole-burned spectra of reaction centers of rhodopseudomonas viridis  

SciTech Connect

Structured hole-burned spectra for P960 of Rps, viridis are reported which, for appropriate burn wavelengths, exhibit four holes (including a zero-phonon hole). The data indicate that two electronic states contribute significantly to P960 and suggest that the primary electron-transfer step should be modeled in terms of coupled adiabatic trimer states.

Tang, D.; Jankowiak, R.; Gillie, J.K.; Small, G.J.; Tiede, D.M.

1988-07-14T23:59:59.000Z

453

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

454

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

455

Soot from the burning of fossil fuels and solid biofuels contributes far more to global  

E-Print Network (OSTI)

Soot from the burning of fossil fuels and solid biofuels contributes far more to global warming Researchers ScienceDaily (July 30, 2010) -- Soot from the burning of fossil fuels and solid biofuels biofuels, such as wood, manure, dung, and other solid biomass used for home heating and cooking in many

456

FLAMES IN TYPE Ia SUPERNOVA: DEFLAGRATION-DETONATION TRANSITION IN THE OXYGEN-BURNING FLAME  

Science Conference Proceedings (OSTI)

The flame in a Type Ia supernova is a conglomerate structure that, depending on density, may involve separate regions of carbon, oxygen, and silicon burning, all propagating in a self-similar, subsonic front. The separation between these three burning regions increases as the density declines until eventually, below about 2 x 10{sup 7} g cm{sup -3}, only carbon burning remains active, the other two burning phases having 'frozen out' on stellar scales. Between 2 and 3 x 10{sup 7} g cm{sup -3}, however, there remains an energetic oxygen-burning region that trails the carbon burning by an amount that is sensitive to the turbulence intensity. As the carbon flame makes a transition to the distributed regime (Karlovitz number {approx}> 10), the characteristic separation between the carbon- and oxygen-burning regions increases dramatically, from a fraction of a meter to many kilometers. The oxygen-rich mixture between the two flames is created at a nearly constant temperature, and turbulence helps to maintain islands of well-mixed isothermal fuel as the temperature increases. The delayed burning of these regions can be supersonic and could initiate a detonation.

Woosley, S. E. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Kerstein, A. R. [Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551 (United States); Aspden, A. J., E-mail: woosley@ucolick.org, E-mail: arkerst@sandia.gov, E-mail: ajaspden@lbl.gov [Center for Computational Sciences and Engineering, Lawrence Berkeley National Laboratory, CA 94720 (United States)

2011-06-10T23:59:59.000Z

457

The Burning Issue By Alyssa A. Lappen and Jack D. Lauber  

E-Print Network (OSTI)

The Burning Issue By Alyssa A. Lappen and Jack D. Lauber FrontPageMagazine.com | March 1, 2006 in the U.S. By 1999, Japan was burning more than 74 percent of its municipal waste and landfilling only 20

Columbia University

458

A MODIS assessment of the summer 2007 extent burned in Greece  

Science Conference Proceedings (OSTI)

Devastating fires affected Greece in the summer 2007, with the loss of more than 60 human lives, the destruction of more than 100 villages and hundreds of square kilometres of forest burned. This Letter presents a map of the extent burned and the approximate ...

Luigi Boschetti; David Roy; Paulo Barbosa; Roberto Boca; Chris Justice

2008-04-01T23:59:59.000Z

459

Explosive hydrogen burning during type I X-ray bursts  

E-Print Network (OSTI)

Explosive hydrogen burning in type I X-ray bursts (XRBs) comprise charged particle reactions creating isotopes with masses up to A~100. Since charged particle reactions in a stellar environment are very temperature sensitive, we use a realistic time-dependent general relativistic and self-consistent model of type I x-ray bursts to provide accurate values of the burst temperatures and densities. This allows a detailed and accurate time-dependent identification of the reaction flow from the surface layers through the convective region and the ignition region to the neutron star ocean. Using this, we determine the relative importance of specific nuclear reactions in the X-ray burst.

Jacob Lund Fisker; Hendrik Schatz; Friedrich-Karl Thielemann

2007-03-13T23:59:59.000Z

460

Systems Analysis of a Compact Next Step Burning Plasma Experiment  

Science Conference Proceedings (OSTI)

A new burning plasma systems code (BPSC) has been developed for analysis of a next step compact burning plasma experiment with copper-alloy magnet technology. We consider two classes of configurations: Type A, with the toroidal field (TF) coils and ohmic heating (OH) coils unlinked, and Type B, with the TF and OH coils linked. We obtain curves of the minimizing major radius as a function of aspect ratio R(A) for each configuration type for typical parameters. These curves represent, to first order, cost minimizing curves, assuming that device cost is a function of major radius. The Type B curves always lie below the Type A curves for the same physics parameters, indicating that they lead to a more compact design. This follows from that fact that a high fraction of the inner region, r < R-a, contains electrical conductor material. However, the fact that the Type A OH and TF magnets are not linked presents fewer engineering challenges and should lead to a more reliable design. Both the Type A and Type B curves have a minimum in major radius R at a minimizing aspect ratio A typically above 2.8 and at high values of magnetic field B above 10 T. The minimizing A occurs at larger values for longer pulse and higher performance devices. The larger A and higher B design points also have the feature that the ratio of the discharge time to the current redistribution time is largest so that steady-state operation can be more realistically prototyped. A sensitivity study is presented for the baseline Type A configuration showing the dependence of the results on the parameters held fixed for the minimization study.

S.C. Jardin; C.E. Kessel; D. Meade; C. Neumeyer

2002-02-06T23:59:59.000Z

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


461

Biomass burning sources of nitrogen oxides, carbon monoxide, and non-methane hydrocarbons  

SciTech Connect

Biomass burning is an important source of many key tropospheric species, including aerosols, carbon dioxide (CO{sub 2}), nitrogen oxides (NO{sub {times}}=NO+NO{sub 2}), carbon monoxide (CO), methane (CH{sub 4}), nitrous oxide (N{sub 2}O), methyl bromide (CH{sub 3}Br), ammonia (NH{sub 3}), non-methane hydrocarbons (NMHCs) and other species. These emissions and their subsequent products act as pollutants and affect greenhouse warming of the atmosphere. One important by-product of biomass burning is tropospheric ozone, which is a pollutant that also absorbs infrared radiation. Ozone is formed when CO, CH{sub 4}, and NMHCs react in the presence of NO{sub {times}} and sunlight. Ozone concentrations in tropical regions (where the bulk of biomass burning occurs) may increase due to biomass burning. Additionally, biomass burning can increase the concentration of nitric acid (HNO{sub 3}), a key component of acid rain.

Atherton, C.S.

1995-11-01T23:59:59.000Z

462

Advanced Manufacturing Office: Technical Assistance  

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

Assistance on Twitter Bookmark Advanced Manufacturing Office: Technical Assistance on Google Bookmark Advanced Manufacturing Office: Technical Assistance on Delicious Rank...

463

Advanced Manufacturing Office: Financial Opportunities  

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

on Twitter Bookmark Advanced Manufacturing Office: Financial Opportunities on Google Bookmark Advanced Manufacturing Office: Financial Opportunities on Delicious Rank...

464

MIT Joint Program on the Science and Policy of Global Change  

E-Print Network (OSTI)

Code §30B Incentives provides a credit for energy efficient vehicles that fall into the following categories*: 1) Fuel Cell Vehicles 2) Advanced Lean Burn Technology Vehicles 3) Hybrid vehicles 4/industry) to 2017 and tax credits provided for vehicle incremental cost 2018 to 2025 · Case 3 ­ Tax credits provided

465

Biomass burning in Asia : annual and seasonal estimates and atmospheric emissions.  

DOE Green Energy (OSTI)

Estimates of biomass burning in Asia are developed to facilitate the modeling of Asian and global air quality. A survey of national, regional, and international publications on biomass burning is conducted to yield consensus estimates of 'typical' (i.e., non-year-specific) estimates of open burning (excluding biofuels). We conclude that 730 Tg of biomass are burned in a typical year from both anthropogenic and natural causes. Forest burning comprises 45% of the total, the burning of crop residues in the field comprises 34%, and 20% comes from the burning of grassland and savanna. China contributes 25% of the total, India 18%, Indonesia 13%, and Myanmar 8%. Regionally, forest burning in Southeast Asia dominates. National, annual totals are converted to daily and monthly estimates at 1{sup o} x 1{sup o} spatial resolution using distributions based on AVHRR fire counts for 1999--2000. Several adjustment schemes are applied to correct for the deficiencies of AVHRR data, including the use of moving averages, normalization, TOMS Aerosol Index, and masks for dust, clouds, landcover, and other fire sources. Good agreement between the national estimates of biomass burning and adjusted fire counts is obtained (R{sup 2} = 0.71--0.78). Biomass burning amounts are converted to atmospheric emissions, yielding the following estimates: 0.37 Tg of SO{sub 2}, 2.8 Tg of NO{sub x}, 1100 Tg of CO{sub 2}, 67 Tg of CO, 3.1 Tg of CH{sub 4}, 12 Tg of NMVOC, 0.45 Tg of BC, 3.3 Tg of OC, and 0.92 Tg of NH{sub 3}. Uncertainties in the emission estimates, measured as 95% confidence intervals, range from a low of {+-}65% for CO{sub 2} emissions in Japan to a high of {+-}700% for BC emissions in India.

Streets, D. G.; Yarber, K. F.; Woo, J.-H.; Carmichael, G. R.; Decision and Information Sciences; Univ. of Iowa

2003-10-15T23:59:59.000Z

466

Persistent infrared spectral hole burning of NO; ions in potassium halide crystals. I. Priric9ple and satellite.holle generation  

E-Print Network (OSTI)

Persistent infrared spectral hole burning of NO; ions in potassium halide crystals. I. Priric9ple spectroscopyand persistentinfrared spectralhole (PIRSH) burning separatelyand together. With interferometry cm --'and, with PIRSH burning, it has beendemijnstratedthat the narrowestlinesare

Sethna, James P.

467

A Study of the Relation of Meteorological Variables to Monthly Provincial Area Burned by Wildfire in Canada (1953–80)  

Science Conference Proceedings (OSTI)

The relation between meteorological variables and the monthly area burned by wildfire from May to August 1953–80 in nine Canadian “provinces” was investigated. A purely statistical approach to estimating the monthly provincial area burned, using ...

M. D. Flannigan; J. B. Harrington

1988-04-01T23:59:59.000Z

468

Advanced Concepts Breakout Group  

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

Workshop Workshop Advanced Concepts Working Group Facilitator: John J. Petrovic Scribe: Sherry Marin Advanced Storage Techniques/ Approaches in Priority Order 1. Crystalline Nanoporous Materials (15) 2. Polymer Microspheres (12) Self-Assembled Nanocomposites (12) 3. Advanced Hydrides (11) Metals - Organic (11) 4. BN Nanotubes (5) Hydrogenated Amorphous Carbon (5) 5. Mesoporous materials (4) Bulk Amorphous Materials (BAMs) (4) 6. Iron Hydrolysis (3) 7. Nanosize powders (2) 8. Metallic Hydrogen (1) Hydride Alcoholysis (1) Overarching R&D Questions for All Advanced Materials * Maximum storage capacity - theoretical model * Energy balance / life cycle analysis * Hydrogen absorption / desorption kinetics * Preliminary cost analysis - potential for low cost, high

469

Institute for Advanced Studies  

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

Institute for Advanced Studies Institute for Advanced Studies Institute for Advanced Studies NMC leverages the strengths of three research universities to build joint programs, develop strategic partnerships, provide common organization and facilities. Contact Leader TBD LANL Program Administrator Pam Hundley (505) 663-5453 Email Building regional partnerships in education, leveraging strengths of three research universities The Institute for Advanced Studies (IAS) works with the three New Mexico research universities (University of New Mexico, New Mexico Tech, and New Mexico State University) to develop research and educational collaborations and partnerships. To facilitate interactions between the universities and LANL, the three New Mexico schools established the New Mexico Consortium (NMC), a nonprofit

470

Advanced Materials | ORNL  

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

Research Areas Research Areas Research Highlights Facilities and Capabilities Science to Energy Solutions News & Awards Events and Conferences Supporting Organizations Directionally Solidified Materials Using high-temperature optical floating zone furnace to produce monocrystalline molybdenum alloy micro-pillars Home | Science & Discovery | Advanced Materials Advanced Materials | Advanced Materials SHARE ORNL has the nation's most comprehensive materials research program and is a world leader in research that supports the development of advanced materials for energy generation, storage, and use. We have core strengths in three main areas: materials synthesis, characterization, and theory. In other words, we discover and make new materials, we study their structure,

471

Advanced Research Materials Program  

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

materials requirements for all fossil energy systems, including materials for advanced power generation and coal fuels technologies. Examples of these technologies include coal...

472

Project: Advanced Fire Detection  

Science Conference Proceedings (OSTI)

... residential fire deaths through development of measurement ... Beyond advances in sensing technologies, a key ... data will be used to develop and test ...

2013-05-30T23:59:59.000Z

473

advance meeting brochure  

Science Conference Proceedings (OSTI)

May 23, 1999 ... Ponte Vedra Beach, Florida, USA. ADVANCE PROGRAM ..... but she has two enclosed glass-sided decks, an out- side balcony and the ...

474

Brochures | Advanced Photon Source  

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

Podcasts Image Gallery external site Video Library Syndicated Feeds (RSS) The Advanced Photon Source: Lighting the Way to a Better Tomorrow aps brochure The APS helps...

475

Divisions | Advanced Photon Source  

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

Chart Argonne Research Divisions APS Research Divisions In May 2002, The Advanced Photon Source was reorganized into three divisions: the Accelerator Systems Division...

476

Advanced Mixing Models  

Propose mixing indicators. Turbulence kinetic energy ... (Turbulence intensity observed at Point 8 in Tank B & C) Advanced Mixing Models. Computational Sciences. 13.

477

Advancement in Battery Materials  

Science Conference Proceedings (OSTI)

Oct 18, 2010 ... Advanced Electrochemical Storage for Renewable Integration and Utility Applications: Zhenguo "Gary" Yang1; Dawon Choi1; Gordon Graff1; ...

478

OpenADR Advances  

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

Volume 54 Issue 11 Date Published 112012 Keywords communication and standards, openadr, smart grid Abstract An important goal for the advancement of smart grid deployments is to...

479

DOE Advanced Protection Project  

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

Task 3 - Advanced Protection - Evaluate measures - 2009 - Design, model Irvine Smart Grid Demo protection system - 2010 6 Copyright 2010, Southern California Edison Task 1 -...

480

Volume159,number 1 CHEMICALPHYSICS LETTERS 30 June 1989 TIME EVOLUTION OF NON-PHOTOCHEMICAL HOLE BURNING LINEWIDTHS  

E-Print Network (OSTI)

BURNING LINEWIDTHS: OBSERVATION OF SPECTRAL DIFFUSION AT LONG TIMES K.A. LITTAU, Y.S. BAI and M.D. FAYER 18 April 1989 Time-dependent non-photochemical hole burning linewidths for cresyl violet in ethanol of experimental techniques used to measure op- tical dephasing in glasses e.g. hole burning [ 12 1,two- pulse

Fayer, Michael D.

Note: This page contains sample records for the topic "advanced lean burn" 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.


481

Hole-burning techniques for isolation and study of individual hyperfine transitions in inhomogeneously broadened solids demonstrated in Pr3+  

E-Print Network (OSTI)

Hole-burning techniques for isolation and study of individual hyperfine transitions been limited. However, here we present spectroscopic techniques, based on spectral hole burning of hole-burning pulses is used to isolate selected transitions between hyperfine levels, which makes

Suter, Dieter

482

PUBLISHED ONLINE: 5 DECEMBER 2010 | DOI: 10.1038/NGEO1027 Recent acceleration of biomass burning and  

E-Print Network (OSTI)

burning and carbon losses in Alaskan forests and peatlands Merritt R. Turetsky1 *, Evan S. Kane2 in burned area and fire frequency are expected to stimulate boreal carbon losses3­5 . However, the impact of wildfires on carbon emissions is also affected by the severity of burning. How climate change influences

Ruess, Roger W.

483

Studying trends in biomass burning aerosol using the Absorbing Aerosol Index derived from GOME, SCIAMACHY, and GOME-2  

E-Print Network (OSTI)

Studying trends in biomass burning aerosol using the Absorbing Aerosol Index derived from GOME burning events. It is found that the regional AAI data follow the regional tropospheric NO2 data well sensitive to desert dust aerosols (DDA) and biomass burning aerosols (BBA). See Figure 1. The AAI

Tilstra, Gijsbert

484

Burning A Disc Using InfraRecorder On the PC desktop, double click on the Accessories and Utilities folder.  

E-Print Network (OSTI)

Burning A Disc Using InfraRecorder On the PC desktop, double click on the Accessories and Utilities to burn. For Word, Excel, PDFs, etc., select Data Disc and CD or DVD as appropriate. At the next screen the pane to the upper left allows you to maneuver to the location of the file(s) you wish to burn. The pane

Kim, Duck O.

485

Texas A&M AgriLife Research Procedures 24.01.01.A0.09 Outdoor Burning  

E-Print Network (OSTI)

Texas A&M AgriLife Research Procedures 24.01.01.A0.09 Outdoor Burning Approved: October 5, 2000: August 27, 2014 Texas A&M AgriLife Research Procedure 24.01.01.A0.09 Outdoor Burning Page 1 of 2 PROCEDURE STATEMENT The Texas Commission on Environmental Quality (TCEQ) regulates outdoor burning (30 TAC

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Powder Metallurgy of Uranium Alloy Fuels for TRU-Burning Reactors Final Technical Report  

SciTech Connect

Overview Fast reactors were evaluated to enable the transmutation of transuranic isotopes generated by nuclear energy systems. The motivation for this was that TRU isotopes have high radiotoxicity and relatively long half-lives, making them unattractive for disposal in a long-term geologic repository. Fast reactors provide an efficient means to utilize the energy content of the TRUs while destroying them. An enabling technology that requires research and development is the fabrication metallic fuel containing TRU isotopes using powder metallurgy methods. This project focused upon developing a powder metallurgical fabrication method to produce U-Zr-transuranic (TRU) alloys at relatively low processing temperatures (500ºC to 600ºC) using either hot extrusion or alpha-phase sintering for charecterization. Researchers quantified the fundamental aspects of both processing methods using surrogate metals to simulate the TRU elements. The process produced novel solutions to some of the issues relating to metallic fuels, such as fuel-cladding chemical interactions, fuel swelling, volatility losses during casting, and casting mold material losses. Workscope There were two primary tasks associated with this project: 1. Hot working fabrication using mechanical alloying and extrusion • Design, fabricate, and assemble extrusion equipment • Extrusion database on DU metal • Extrusion database on U-10Zr alloys • Extrusion database on U-20xx-10Zr alloys • Evaluation and testing of tube sheath metals 2. Low-temperature sintering of U alloys • Design, fabricate, and assemble equipment • Sintering database on DU metal • Sintering database on U-10Zr alloys • Liquid assisted phase sintering on U-20xx-10Zr alloys Appendices Outline Appendix A contains a Fuel Cycle Research & Development (FCR&D) poster and contact presentation where TAMU made primary contributions. Appendix B contains MSNE theses and final defense presentations by David Garnetti and Grant Helmreich outlining the beginning of the materials processing setup. Also included within this section is a thesis proposal by Jeff Hausaman. Appendix C contains the public papers and presentations introduced at the 2010 American Nuclear Society Winter Meeting. Appendix A—MSNE theses of David Garnetti and Grant Helmreich and proposal by Jeff Hausaman A.1 December 2009 Thesis by David Garnetti entitled “Uranium Powder Production Via Hydride Formation and Alpha Phase Sintering of Uranium and Uranium-Zirconium Alloys for Advanced Nuclear Fuel Applications” A.2 September 2009 Presentation by David Garnetti (same title as document in Appendix B.1) A.3 December 2010 Thesis by Grant Helmreich entitled “Characterization of Alpha-Phase Sintering of Uranium and Uranium-Zirconium Alloys for Advanced Nuclear Fuel Applications” A.4 October 2010 Presentation by Grant Helmreich (same title as document in Appendix B.3) A.5 Thesis Proposal by Jeffrey Hausaman entitled “Hot Extrusion of Alpha Phase Uranium-Zirconium Alloys for TRU Burning Fast Reactors” Appendix B—External presentations introduced at the 2010 ANS Winter Meeting B.1 J.S. Hausaman, D.J. Garnetti, and S.M. McDeavitt, “Powder Metallurgy of Alpha Phase Uranium Alloys for TRU Burning Fast Reactors,” Proceedings of 2010 ANS Winter Meeting, Las Vegas, Nevada, USA, November 7-10, 2010 B.2 PowerPoint Presentation Slides from C.1 B.3 G.W. Helmreich, W.J. Sames, D.J. Garnetti, and S.M. McDeavitt, “Uranium Powder Production Using a Hydride-Dehydride Process,” Proceedings of 2010 ANS Winter Meeting, Las Vegas, Nevada, USA, November 7-10, 2010 B.4. PowerPoint Presentation Slides from C.3 B.5 Poster Presentation from C.3 Appendix C—Fuel cycle research and development undergraduate materials and poster presentation C.1 Poster entitled “Characterization of Alpha-Phase Sintering of Uranium and Uranium-Zirconium Alloys” presented at the Fuel Cycle Technologies Program Annual Meeting C.2 April 2011 Honors Undergraduate Thesis by William Sames, Research Fellow, entitled “Uranium Metal Powder Production, Particle Dis

Sean M. McDeavitt

2011-04-29T23:59:59.000Z

487

Measurement of adiabatic burning velocity in natural gas-like mixtures  

SciTech Connect

Experimental measurements of the adiabatic burning velocities were carried out for natural gas-like mixtures burning in air over a range of equivalence ratios at atmospheric pressure. Effect of CO{sub 2} dilution up to 60%, N{sub 2} dilution up to 40% and 25% enrichment of ethane on burning velocity of methane-air flames were studied. Heat flux method with setup similar to that of [K.J. Bosschaart, L.P.H. de Goey, Detailed analysis of the heat flux method for measuring burning velocity, Combustion and Flame 132 (2003) 170-180] was used for measurement of burning velocities. Initially experiments were done for methane-air and ethane-air mixtures at various equivalence ratios and the results were in good agreement with published data in the literature. Computations were performed using PREMIX code with GRI 3.0 reaction mechanism for all the mixtures. Predicted flame structures were used to the explain the effect of N{sub 2} and CO{sub 2} dilution on burning velocity of methane-air flames. Peak burning velocity for CH{sub 4}/CO{sub 2}-air mixtures occur near to {phi} = 1.0. (author)

Ratna Kishore, V.; Duhan, Nipun; Ravi, M.R.; Ray, Anjan [Department of Mechanical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110 016 (India)

2008-10-15T23:59:59.000Z

488

Interaction of the burning spherical droplets in oxygen-enriched turbulent environment  

SciTech Connect

Three-dimensional numerical studies on the interaction of vaporizing and burning droplets were conducted to understand the burning characteristics of multiple droplets in a turbulent environment. The burning droplets characteristics, such as lifetime, surface temperature, vaporization, reaction, and burning rate were examined for various oxygen mole-fractions and geometrical arrangements of droplets. Results from a single droplet combustion test were first verified and validated against existing experimental data. Results indicate that turbulent intensity has a moderate effect on droplet burning rate, but not as prominent an effect as the oxygen mole-fraction. At high oxygen mole-fractions, droplet lifetime was short due to enhanced burning. It is shown that evaporation processes of multiple droplets are notably affected by the inter-space distance between d