Sample records for leaf gas exchange

  1. Effects of tree height on branch hydraulics, leaf structure and gas exchange in California redwoods

    E-Print Network [OSTI]

    Sillett, Stephen Charles

    with height in both species. Despite hydraulic adjustments, leaf mass per unit area (LMA) and leaf carbon sempervirens; Sequoiadendron gigan- teum; carbon isotopes; hydraulic conductivity; photosyn- thesis; stomatal becomes too great (Zimmermann 1983; Tyree & Sperry 1989). Air seeding occurs when an air bubble is pulled

  2. Gas Exchange, Partial Pressure Gradients,

    E-Print Network [OSTI]

    Riba Sagarra, Jaume

    Gas Exchange, Partial Pressure Gradients, and the Oxygen Window Johnny E. Brian, Jr., M of circulatory and gas transport physiology, and the best place to start is with normobaric physiology. LIFE affect the precise gas exchange occurring in individual areas of the lungs and body tissues. To make

  3. Hydraulic Properties of Rice and the Response of Gas Exchange to Water Stress1

    E-Print Network [OSTI]

    Stiller, Volker

    Hydraulic Properties of Rice and the Response of Gas Exchange to Water Stress1 Volker Stiller*, H.R.L.) We investigated the role of xylem cavitation, plant hydraulic conductance, and root pressure-specific photosynthetic rate, leaf diffusive conductance, and soil-leaf hydraulic conductance that were associated

  4. affect gas exchange: Topics by E-print Network

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

    were Ho, David 15 AIR-WATER GAS EXCHANGE: MECHANISMS GOVERNING THE COMBINED EFFECTS OF WIND AND RAIN ON THE GAS TRANSFER Geosciences Websites Summary: AIR-WATER GAS EXCHANGE:...

  5. activity gas exchange: Topics by E-print Network

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

    were Ho, David 13 AIR-WATER GAS EXCHANGE: MECHANISMS GOVERNING THE COMBINED EFFECTS OF WIND AND RAIN ON THE GAS TRANSFER Geosciences Websites Summary: AIR-WATER GAS EXCHANGE:...

  6. affects gas exchange: Topics by E-print Network

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

    were Ho, David 15 AIR-WATER GAS EXCHANGE: MECHANISMS GOVERNING THE COMBINED EFFECTS OF WIND AND RAIN ON THE GAS TRANSFER Geosciences Websites Summary: AIR-WATER GAS EXCHANGE:...

  7. Experimental setup for the investigation of bubble mediated gas exchange

    E-Print Network [OSTI]

    Jaehne, Bernd

    time. For small bubbles, the gas exchange is therefore directly related to the volume fluxExperimental setup for the investigation of bubble mediated gas exchange Wolfgang Mischler1,2 , Roland Rocholz2 and Bernd J¨ahne1,2 1 Heidelberg Collaboratory for Image Processing, University

  8. Improved helium exchange gas cryostat and sample tube designs for automated gas sampling and cryopumping

    E-Print Network [OSTI]

    Severinghaus, Jeffrey P.

    Improved helium exchange gas cryostat and sample tube designs for automated gas sampling, California 92093-0244, USA [1] In order to eliminate the use of liquid helium for the extraction of atmospheric gases from polar ice cores, two units of a redesigned top load helium exchange gas cryostat were

  9. Gas exchange in terrestrial environments comes at the cost of evaporative water loss from respiratory surfaces.

    E-Print Network [OSTI]

    Franz, Nico M.

    3477 Gas exchange in terrestrial environments comes at the cost of evaporative water loss from of gas exchange, both within and among species (Lighton, 1998; Shelton and Appel, 2001; Chown, 2002). The classical pattern is that of discontinuous gas exchange, or discontinuous gas-exchange cycles (DGC; Lighton

  10. Energy Recovery By Direct Contact Gas-Liquid Heat Exchange

    E-Print Network [OSTI]

    Fair, J. R.; Bravo, J. L.

    ENERGY RECOVERY BY DIRECf CONTACf GAS-LIQUID HEAT EXCHANGE James R. Fair and Jose L. Bravo Separations Research Program The University o/Texas at Austin Austin, Texas ABSIRACf Energy from hot gas discharge streams can be recovered... by transfer directly to a coolant liquid in one of several available gas-liquid contacting devices. The design of the device is central to the theme of this paper, and experimental work has verified that the analogy between heat transfer and mass transfer...

  11. air-sea gas exchange: Topics by E-print Network

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

    were Ho, David 49 AIR-WATER GAS EXCHANGE: MECHANISMS GOVERNING THE COMBINED EFFECTS OF WIND AND RAIN ON THE GAS TRANSFER Geosciences Websites Summary: AIR-WATER GAS EXCHANGE:...

  12. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

    DOE Patents [OSTI]

    McBride, Troy O; Bell, Alexander; Bollinger, Benjamin R; Shang, Andrew; Chmiel, David; Richter, Horst; Magari, Patrick; Cameron, Benjamin

    2013-07-02T23:59:59.000Z

    In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

  13. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

    DOE Patents [OSTI]

    McBride, Troy O.; Bell, Alexander; Bollinger, Benjamin R.

    2012-08-07T23:59:59.000Z

    In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

  14. Turning over a new `leaf': multiple functional significances of leaves versus phyllodes in Hawaiian Acacia koapce_2207 2084..2100

    E-Print Network [OSTI]

    Sack, Lawren

    gas exchange, structure and composition, hydraulic con- ductance, and responses to varying light including stomatal pore area per leaf area, leaf area-based gas exchange rates and cuticular conductance & Zeiger 2006). We assessed the functional conse- quences of heteroblasty in Acacia koa (koa; Fig. 1

  15. Toward A Quantitative Understanding of Gas Exchange in the Lung

    E-Print Network [OSTI]

    Chang, Yulin V

    2010-01-01T23:59:59.000Z

    In this work we present a mathematical framework that quantifies the gas-exchange processes in the lung. The theory is based on the solution of the one-dimensional diffusion equation on a simplified model of lung septum. Gases dissolved into different compartments of the lung are all treated separately with physiologically important parameters. The model can be applied in magnetic resonance of hyperpolarized xenon for quantification of lung parameters such as surface-to-volume ratio and the air-blood barrier thickness. In general this model provides a description of a broad range of biological exchange processes that are driven by diffusion.

  16. Modeled natural and excess radiocarbon: Sensitivities to the gas exchange formulation and ocean

    E-Print Network [OSTI]

    Fischlin, Andreas

    Modeled natural and excess radiocarbon: Sensitivities to the gas exchange formulation and ocean. Stocker (2008), Modeled natural and excess radiocarbon: Sensitivities to the gas exchange formulation descriptions of the air-sea gas exchange the models produce similar column inventories for excess 14 C among

  17. PREDICTION OF TOTAL DISSOLVED GAS EXCHANGE AT HYDROPOWER DAMS

    SciTech Connect (OSTI)

    Hadjerioua, Boualem [ORNL; Pasha, MD Fayzul K [ORNL; Stewart, Kevin M [ORNL; Bender, Merlynn [Bureau of Reclamation; Schneider, Michael L. [U.S. Army Corps of Engineers

    2012-07-01T23:59:59.000Z

    Total dissolved gas (TDG) supersaturation in waters released at hydropower dams can cause gas bubble trauma in fisheries resulting in physical injuries and eyeball protrusion that can lead to mortality. Elevated TDG pressures in hydropower releases are generally caused by the entrainment of air in spillway releases and the subsequent exchange of atmospheric gasses into solution during passage through the stilling basin. The network of dams throughout the Columbia River Basin (CRB) are managed for irrigation, hydropower production, flood control, navigation, and fish passage that frequently result in both voluntary and involuntary spillway releases. These dam operations are constrained by state and federal water quality standards for TDG saturation which balance the benefits of spillway operations designed for Endangered Species Act (ESA)-listed fisheries versus the degradation to water quality as defined by TDG saturation. In the 1970s, the United States Environmental Protection Agency (USEPA), under the federal Clean Water Act (Section 303(d)), established a criterion not to exceed the TDG saturation level of 110% in order to protect freshwater and marine aquatic life. The states of Washington and Oregon have adopted special water quality standards for TDG saturation in the tailrace and forebays of hydropower facilities on the Columbia and Snake Rivers where spillway operations support fish passage objectives. The physical processes that affect TDG exchange at hydropower facilities have been studied throughout the CRB in site-specific studies and routine water quality monitoring programs. These data have been used to quantify the relationship between project operations, structural properties, and TDG exchange. These data have also been used to develop predictive models of TDG exchange to support real-time TDG management decisions. These empirically based predictive models have been developed for specific projects and account for both the fate of spillway and powerhouse flows in the tailrace channel and resultant exchange in route to the next downstream dam. Currently, there exists a need to summarize the general finding from operational and structural TDG abatement programs conducted throughout the CRB and for the development of a generalized prediction model that pools data collected at multiple projects with similar structural attributes. A generalized TDG exchange model can be tuned to specific projects and coupled with water regulation models to allow the formulation of optimal daily water regulation schedules subject to water quality constraints for TDG supersaturation. A generalized TDG exchange model can also be applied to other hydropower dams that affect TDG pressures in tailraces and can be used to develop alternative operational and structural measures to minimize TDG generation. It is proposed to develop a methodology for predicting TDG levels downstream of hydropower facilities with similar structural properties as a function of a set of variables that affect TDG exchange; such as tailwater depth, spill discharge and pattern, project head, and entrainment of powerhouse releases. TDG data from hydropower facilities located throughout the northwest region of the United States will be used to identify relationships between TDG exchange and relevant dependent variables. Data analysis and regression techniques will be used to develop predictive TDG exchange expressions for various structural categories.

  18. The SOLAS airsea gas exchange experiment (SAGE) 2004 Mike J. Harvey a,n

    E-Print Network [OSTI]

    Ho, David

    The SOLAS air­sea gas exchange experiment (SAGE) 2004 Mike J. Harvey a,n , Cliff S. Law a , Murray­sea gas exchange Iron fertilisation Ocean biogeochemistry SOLAS a b s t r a c t The SOLAS air­sea gas

  19. Gas-Surface Energy Exchange in Collisions of Helium Atoms with Aligned Single-Walled Carbon

    E-Print Network [OSTI]

    Maruyama, Shigeo

    1 Gas-Surface Energy Exchange in Collisions of Helium Atoms with Aligned Single-Walled Carbon #12;2 ABSTRACT Since gas flows in micro/nano devices are dominated by the interaction of gas molecules accommodation of gas molecules on surfaces. The scattering of gas molecules on quartz surfaces covered with VA

  20. Optimisation of the Gas-Exchange System of Combustion Engines by Genetic Algorithm

    E-Print Network [OSTI]

    Marsland, Stephen

    Optimisation of the Gas-Exchange System of Combustion Engines by Genetic Algorithm C. D. Rose, S. R of combustion engine gas-exchange systems still predominantly use trial and error. This paper proposes a new. Keywords - genetic algorithm; variable-length input encoding; combustion engine; optimisation I

  1. Universal model for water costs of gas exchange by animals and plants

    E-Print Network [OSTI]

    of the respiratory system near the outside of the organism, the gas consumed (oxygen or carbon dioxide meta- bolic and exchange systems. carbon dioxide | oxygen | respiration | temperature | scaling All for specific taxa, we integrate properties common to all terrestrial gas exchangers into a universal model

  2. Heat exchanger design for thermoelectric electricity generation from low temperature flue gas streams

    E-Print Network [OSTI]

    Latcham, Jacob G. (Jacob Greco)

    2009-01-01T23:59:59.000Z

    An air-to-oil heat exchanger was modeled and optimized for use in a system utilizing a thermoelectric generator to convert low grade waste heat in flue gas streams to electricity. The NTU-effectiveness method, exergy, and ...

  3. Analysis of the second order exchange self energy of a dense electron gas

    E-Print Network [OSTI]

    M. L. Glasser; George Lamb

    2006-11-02T23:59:59.000Z

    We investigate the evaluation of the six-fold integral representation for the second order exchange contribution to the self energy of a three dimensional electron gas at the Fermi surface.

  4. Gas exchange and water relations of evergreen and deciduous tropical savanna trees

    E-Print Network [OSTI]

    Boyer, Edmond

    Gas exchange and water relations of evergreen and deciduous tropical savanna trees G. Goldstein1 F savannas with pro- nounced wet/dry seasonality and well- drained soils are characterized by the presence the rainless period (Medina, 1982; Sarmiento et al., 1985). The purpose of this study was to investi- gate gas

  5. Hydraulically actuated gas exchange valve assembly and engine using same

    DOE Patents [OSTI]

    Carroll, Thomas S. (Peoria, IL); Taylor, Gregory O. (Hinsdale, IL)

    2002-09-03T23:59:59.000Z

    An engine comprises a housing that defines a hollow piston cavity that is separated from a gas passage by a valve seat. The housing further defines a biasing hydraulic cavity and a control hydraulic cavity. A gas valve member is also included in the engine and is movable relative to the valve seat between an open position at which the hollow piston cavity is open to the gas passage and a closed position in which the hollow piston cavity is blocked from the gas passage. The gas valve member includes a ring mounted on a valve piece and a retainer positioned between the ring and the valve piece. A closing hydraulic surface is included on the gas valve member and is exposed to liquid pressure in the biasing hydraulic cavity.

  6. Compact Ceramic Heat Exchangers for Corrosive Waste Gas Applications

    E-Print Network [OSTI]

    Laws, W. R.; Reed, G. R.

    1982-01-01T23:59:59.000Z

    developed for low temperature corrosive gas situations and have been applied to the pottery industry and are being developed for coal fired air heaters for the food industry....

  7. Recovery of Water from Boiler Flue Gas Using Condensing Heat Exchangers

    SciTech Connect (OSTI)

    Levy, Edward; Bilirgen, Harun; DuPont, John

    2011-03-31T23:59:59.000Z

    Most of the water used in a thermoelectric power plant is used for cooling, and DOE has been focusing on possible techniques to reduce the amount of fresh water needed for cooling. DOE has also been placing emphasis on recovery of usable water from sources not generally considered, such as mine water, water produced from oil and gas extraction, and water contained in boiler flue gas. This report deals with development of condensing heat exchanger technology for recovering moisture from flue gas from coal-fired power plants. The report describes: • An expanded data base on water and acid condensation characteristics of condensing heat exchangers in coal-fired units. This data base was generated by performing slip stream tests at a power plant with high sulfur bituminous coal and a wet FGD scrubber and at a power plant firing highmoisture, low rank coals. • Data on typical concentrations of HCl, HNO{sub 3} and H{sub 2}SO{sub 4} in low temperature condensed flue gas moisture, and mercury capture efficiencies as functions of process conditions in power plant field tests. • Theoretical predictions for sulfuric acid concentrations on tube surfaces at temperatures above the water vapor dewpoint temperature and below the sulfuric acid dew point temperature. • Data on corrosion rates of candidate heat exchanger tube materials for the different regions of the heat exchanger system as functions of acid concentration and temperature. • Data on effectiveness of acid traps in reducing sulfuric acid concentrations in a heat exchanger tube bundle. • Condensed flue gas water treatment needs and costs. • Condensing heat exchanger designs and installed capital costs for full-scale applications, both for installation immediately downstream of an ESP or baghouse and for installation downstream of a wet SO{sub 2} scrubber. • Results of cost-benefit studies of condensing heat exchangers.

  8. Recovery of Water from Boiler Flue Gas Using Condensing Heat Exchangers

    SciTech Connect (OSTI)

    Edward Levy; Harun Bilirgen; John DuPoint

    2011-03-31T23:59:59.000Z

    Most of the water used in a thermoelectric power plant is used for cooling, and DOE has been focusing on possible techniques to reduce the amount of fresh water needed for cooling. DOE has also been placing emphasis on recovery of usable water from sources not generally considered, such as mine water, water produced from oil and gas extraction, and water contained in boiler flue gas. This report deals with development of condensing heat exchanger technology for recovering moisture from flue gas from coal-fired power plants. The report describes: (1) An expanded data base on water and acid condensation characteristics of condensing heat exchangers in coal-fired units. This data base was generated by performing slip stream tests at a power plant with high sulfur bituminous coal and a wet FGD scrubber and at a power plant firing high-moisture, low rank coals. (2) Data on typical concentrations of HCl, HNO{sub 3} and H{sub 2}SO{sub 4} in low temperature condensed flue gas moisture, and mercury capture efficiencies as functions of process conditions in power plant field tests. (3) Theoretical predictions for sulfuric acid concentrations on tube surfaces at temperatures above the water vapor dewpoint temperature and below the sulfuric acid dew point temperature. (4) Data on corrosion rates of candidate heat exchanger tube materials for the different regions of the heat exchanger system as functions of acid concentration and temperature. (5) Data on effectiveness of acid traps in reducing sulfuric acid concentrations in a heat exchanger tube bundle. (6) Condensed flue gas water treatment needs and costs. (7) Condensing heat exchanger designs and installed capital costs for full-scale applications, both for installation immediately downstream of an ESP or baghouse and for installation downstream of a wet SO{sub 2} scrubber. (8) Results of cost-benefit studies of condensing heat exchangers.

  9. Leaf gas exchange and carbohydrate concentrations in Pinus pinaster plants subjected to elevated CO2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to elevated CO2 and a soil drying cycle Catherine Picon-Cochard Jean-Marc Guehl Unité de recherches en.) were acclimated for 2 years under ambient (350 ?mol mol-1)and elevated (700 ?mol mol-1) CO2 concentrations ([CO2]). In the summer of the second growing season, the plants were subjected to a soil drying

  10. Response of shoot growth and gas exchange of Picea abies clones to rain acidity

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Response of shoot growth and gas exchange of Picea abies clones to rain acidity and the addition, particularly the effect of acidity and the addition of a realistic ionic mixture to simulated acidic.0 with a mixture of sulfuric and nitric acids (S02-/NO-weight ratio = 2.4). Ionic concentrations m mg/1were: 4.50 S

  11. Evaluation of Fiber Bundle Rotation for Enhancing Gas Exchange in a Respiratory Assist Catheter

    E-Print Network [OSTI]

    Federspiel, William J.

    of a rotating densely packed bundle of hollow fiber membranes, water and blood gas exchange levels were the concept of an intravenous respiratory assist device, in which a bundle of hollow fiber membranes (HFMs short blind- ended HFMs along its length in a "bottle-brush" configura- tion.11­14 Our group first

  12. A Biochemical Ocean State Estimate in the Southern1 Ocean Gas Exchange Experiment2

    E-Print Network [OSTI]

    Haine, Thomas W. N.

    of the oceanic31 carbon pool. It influences light penetration with consequences for primary productivity1 A Biochemical Ocean State Estimate in the Southern1 Ocean Gas Exchange Experiment2 S. Dwivedi1 , T. W. N. Haine2 and C. E. Del Castillo3 3 1 Department of Atmospheric and Ocean Sciences, University

  13. Guest Molecule Exchange Kinetics for the 2012 Ignik Sikumi Gas Hydrate Field Trial

    SciTech Connect (OSTI)

    White, Mark D.; Lee, Won Suk

    2014-05-14T23:59:59.000Z

    A commercially viable technology for producing methane from natural gas hydrate reservoirs remains elusive. Short-term depressurization field tests have demonstrated the potential for producing natural gas via dissociation of the clathrate structure, but the long-term performance of the depressurization technology ultimately requires a heat source to sustain the dissociation. A decade of laboratory experiments and theoretical studies have demonstrated the exchange of pure CO2 and N2-CO2 mixtures with CH4 in sI gas hydrates, yielding critical information about molecular mechanisms, recoveries, and exchange kinetics. Findings indicated the potential for producing natural gas with little to no production of water and rapid exchange kinetics, generating sufficient interest in the guest-molecule exchange technology for a field test. In 2012 the U.S. DOE/NETL, ConocoPhillips Company, and Japan Oil, Gas and Metals National Corporation jointly sponsored the first field trial of injecting a mixture of N2-CO2 into a CH4-hydrate bearing formation beneath the permafrost on the Alaska North Slope. Known as the Ignik Sikumi #1 Gas Hydrate Field Trial, this experiment involved three stages: 1) the injection of a N2-CO2 mixture into a targeted hydrate-bearing layer, 2) a 4-day pressurized soaking period, and 3) a sustained depressurization and fluid production period. Data collected during the three stages of the field trial were made available after an extensive quality check. These data included continuous temperature and pressure logs, injected and recovered fluid compositions and volumes. The Ignik Sikumi #1 data set is extensive, but contains no direct evidence of the guest-molecule exchange process. This investigation is directed at using numerical simulation to provide an interpretation of the collected data. A numerical simulator, STOMP-HYDT-KE, was recently completed that solves conservation equations for energy, water, mobile fluid guest molecules, and hydrate guest molecules, for up to three gas hydrate guest molecules: CH4, CO2, and N2. The independent tracking of mobile fluid and hydrate guest molecules allows for the kinetic exchange of guest molecules between the mobile fluids and hydrate. The particular interest of this numerical investigation is to determine whether kinetic exchange parameters, determined from laboratory-scale experiments, are directly applicable to interpreting the Ignik Sikumi #1 data.

  14. Soybean leaf hydraulic conductance does not acclimate to growth at elevated [CO2] or temperature in growth chambers or in the field

    E-Print Network [OSTI]

    Sack, Lawren

    Soybean leaf hydraulic conductance does not acclimate to growth at elevated [CO2] or temperature Leaf hydraulic properties are strongly linked with transpiration and photosynthesis in many species. However, it is not known if gas exchange and hydraulics will have co-ordinated responsesto climate change

  15. Gas-phase hydrogen isotope exchange in HF + D2O

    SciTech Connect (OSTI)

    Trowbridge, L.D.

    1982-12-31T23:59:59.000Z

    The gas-phase isotope exchange reaction of HF and D2O has been studied by flow tube and matrix isolation techniques over a range of concentrations and reaction times. The matrix isolation/FTIR gas sampling and analysis technique proved capable of detecting reactants and products even at low concentrations (0.02% and less) and for reaction times down to 10 msec. The reaction under study, however, is sufficiently rapid that it appeared complete at 10 msec even at the lowest reactant concentrations used. From these results, it is therefore possible only to place a lower bound on the reaction rate. This lower bound, arrived at by computer modeling an assumed second order reaction in the flow tube, represents a refinement in the previously established limit by about a factor of 10U and may thus be of utility in UF6 atmospheric release models. 4 refs., 13 figs., 2 tabs.

  16. A computational study of an HCCI engine with direct injection during gas exchange

    SciTech Connect (OSTI)

    Su, Haiyun; Vikhansky, Alexander; Mosbach, Sebastian; Kraft, Markus [Department of Chemical Engineering, University of Cambridge, Cambridge CB2 3RA (United Kingdom); Bhave, Amit [Reaction Engineering Solutions Ltd., 61 Canterbury Street, Cambridge CB4 3QG (United Kingdom); Kim, Kyoung-Oh; Kobayashi, Tatsuo [Higashifuji Technical Center, Toyota Motor Corporation, Mishuku 1200, Susono, Shizuoka 480-1193 (Japan); Mauss, Fabian [Division of Combustion Physics, Lund Institute of Technology, Box 118, S-22100 Lund (Sweden)

    2006-10-15T23:59:59.000Z

    We present a new probability density function (PDF)-based computational model to simulate a homogeneous charge compression ignition (HCCI) engine with direct injection (DI) during gas exchange. This stochastic reactor model (SRM) accounts for the engine breathing process in addition to the closed-volume HCCI engine operation. A weighted-particle Monte Carlo method is used to solve the resulting PDF transport equation. While simulating the gas exchange, it is necessary to add a large number of stochastic particles to the ensemble due to the intake air and EGR streams as well as fuel injection, resulting in increased computational expense. Therefore, in this work we apply a down-sampling technique to reduce the number of stochastic particles, while conserving the statistical properties of the ensemble. In this method some of the most important statistical moments (e.g., concentration of the main chemical species and enthalpy) are conserved exactly, while other moments are conserved in a statistical sense. Detailed analysis demonstrates that the statistical error associated with the down-sampling algorithm is more sensitive to the number of particles than to the number of conserved species for the given operating conditions. For a full-cycle simulation this down-sampling procedure was observed to reduce the computational time by a factor of 8 as compared to the simulation without this strategy, while still maintaining the error within an acceptable limit. Following the detailed numerical investigation, the model, intended for volatile fuels only, is applied to simulate a two-stroke, naturally aspirated HCCI engine fueled with isooctane. The in-cylinder pressure and CO emissions predicted by the model agree reasonably well with the measured profiles. In addition, the new model is applied to estimate the influence of engine operating parameters such as the relative air-fuel ratio and early direct injection timing on HCCI combustion and emissions. The qualitative trends observed in the parametric variation study match well with experimental data in literature. (author)

  17. Gas Transport and Exchange: Interaction Between O2 and CO2 CJ Brauner and JL Rummer, University of British Columbia, Vancouver, BC, Canada

    E-Print Network [OSTI]

    Wood, Spencer

    Gas Transport and Exchange: Interaction Between O2 and CO2 Exchange CJ Brauner and JL Rummer Nonlinear Bohr­Haldane Effect within the OEC Basis for the Interaction between O2 and CO2: Implications of Non-Steady-State Conditions for the Bohr­Haldane Effect Interaction between O2 and CO2 Exchange

  18. The relationship between leaf area growth and biomass accumulation in Arabidopsis thaliana

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Weraduwage, Sarathi M.; Chen, Jin; Anozie, Fransisca C.; Morales, Alejandro; Weise, Sean E.; Sharkey, Thomas D.

    2015-04-09T23:59:59.000Z

    Leaf area growth determines the light interception capacity of a crop and is often used as a surrogate for plant growth in high-throughput phenotyping systems. The relationship between leaf area growth and growth in terms of mass will depend on how carbon is partitioned among new leaf area, leaf mass, root mass, reproduction, and respiration. A model of leaf area growth in terms of photosynthetic rate and carbon partitioning to different plant organs was developed and tested with Arabidopsis thaliana L. Heynh. ecotype Columbia (Col-0) and a mutant line, gigantea-2 (gi-2), which develops very large rosettes. Data obtained from growthmore »analysis and gas exchange measurements was used to train a genetic programming algorithm to parameterize and test the above model. The relationship between leaf area and plant biomass was found to be non-linear and variable depending on carbon partitioning. The model output was sensitive to the rate of photosynthesis but more sensitive to the amount of carbon partitioned to growing thicker leaves. The large rosette size of gi-2 relative to that of Col-0 resulted from relatively small differences in partitioning to new leaf area vs. leaf thickness.« less

  19. The relationship between leaf area growth and biomass accumulation in Arabidopsis thaliana

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Weraduwage, Sarathi M. [Michigan State Univ., East Lansing, MI (United States). Dept. of Biochemistry and Molecular Biology; Chen, Jin [Michigan State Univ., East Lansing, MI (United States). Dept. of Energy Plant Research Lab., Dept. of Computer Science; Anozie, Fransisca C. [Michigan State Univ., East Lansing, MI (United States). Dept. of Biochemistry and Molecular Biology; Morales, Alejandro [Wageningen Univ., Wageningen (Netherlands). Center for Crop Systems Analysis; Weise, Sean E. [Michigan State Univ., East Lansing, MI (United States). Dept. of Biochemistry and Molecular Biology; Sharkey, Thomas D. [Michigan State Univ., East Lansing, MI (United States). Dept. of Biochemistry and Molecular Biology

    2015-04-09T23:59:59.000Z

    Leaf area growth determines the light interception capacity of a crop and is often used as a surrogate for plant growth in high-throughput phenotyping systems. The relationship between leaf area growth and growth in terms of mass will depend on how carbon is partitioned among new leaf area, leaf mass, root mass, reproduction, and respiration. A model of leaf area growth in terms of photosynthetic rate and carbon partitioning to different plant organs was developed and tested with Arabidopsis thaliana L. Heynh. ecotype Columbia (Col-0) and a mutant line, gigantea-2 (gi-2), which develops very large rosettes. Data obtained from growth analysis and gas exchange measurements was used to train a genetic programming algorithm to parameterize and test the above model. The relationship between leaf area and plant biomass was found to be non-linear and variable depending on carbon partitioning. The model output was sensitive to the rate of photosynthesis but more sensitive to the amount of carbon partitioned to growing thicker leaves. The large rosette size of gi-2 relative to that of Col-0 resulted from relatively small differences in partitioning to new leaf area vs. leaf thickness.

  20. Design of compact intermediate heat exchangers for gas cooled fast reactors

    E-Print Network [OSTI]

    Gezelius, Knut, 1978-

    2004-01-01T23:59:59.000Z

    Two aspects of an intermediate heat exchanger (IHX) for GFR service have been investigated: (1) the intrinsic characteristics of the proposed compact printed circuit heat exchanger (PCHE); and (2) a specific design optimizing ...

  1. Corrosive resistant heat exchanger

    DOE Patents [OSTI]

    Richlen, Scott L. (Annandale, VA)

    1989-01-01T23:59:59.000Z

    A corrosive and errosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is conveyed through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium.

  2. Investigation of the effect of intra-molecular interactions on the gas-phase conformation of peptides as probed by ion mobility-mass spectrometry, gas-phase hydrogen/deuterium exchange, and molecular mechanics 

    E-Print Network [OSTI]

    Sawyer, Holly Ann

    2006-04-12T23:59:59.000Z

    Ion mobility-mass spectrometry (IM-MS), gas-phase hydrogen/deuterium (H/D) exchange ion molecule reactions and molecular modeling provide complimentary information and are used here for the characterization of peptide ion structure, including fine...

  3. Investigation of the effect of intra-molecular interactions on the gas-phase conformation of peptides as probed by ion mobility-mass spectrometry, gas-phase hydrogen/deuterium exchange, and molecular mechanics

    E-Print Network [OSTI]

    Sawyer, Holly Ann

    2006-04-12T23:59:59.000Z

    Ion mobility-mass spectrometry (IM-MS), gas-phase hydrogen/deuterium (H/D) exchange ion molecule reactions and molecular modeling provide complimentary information and are used here for the characterization of peptide ion structure, including fine...

  4. Analysis and modeling of gas exchange processes in Scaevola aemula Soo-Hyung Kim a,*, Paul R. Fisher b

    E-Print Network [OSTI]

    Lieth, J. Heinrich

    concentration, and leaf temperature. Net CO2 assimilation rate (A) was responsive to CO2, exhibiting = 1500 mmol mÀ2 sÀ1 . Net CO2 assimilation rates were similar at leaf temperatures between 20 and 30 8C then compared with observations at different leaf temperatures. The model predicted the rates of net CO2

  5. Experimental study of work exchange with a granular gas: the viewpoint of the Fluctuation Theorem.

    E-Print Network [OSTI]

    Boyer, Edmond

    and irreversible thermodynamics PACS 05.40.-a ­ Fluctuation phenomena, random processes, noise, and Brownian motion of the fluctuations of energy flux between a granular gas and a small driven harmonic oscillator. The DC-motor driving forcing, between the motor and the gas are examined from the viewpoint of the Fluctuation Theorem

  6. Single Channel Testing for Characterization of the Direct Gas Cooled Reactor and the SAFE-100 Heat Exchanger

    SciTech Connect (OSTI)

    Bragg-Sitton, S.M. [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109 (United States); Propulsion Research Center, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Kapernick, R. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Godfroy, T.J. [Propulsion Research Center, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States)

    2004-02-04T23:59:59.000Z

    Experiments have been designed to characterize the coolant gas flow in two space reactor concepts that are currently under investigation by NASA Marshall Space Flight Center and Los Alamos National Laboratory: the direct-drive gas-cooled reactor (DDG) and the SAFE-100 heatpipe-cooled reactor (HPR). For the DDG concept, initial tests have been completed to measure pressure drop versus flow rate for a prototypic core flow channel, with gas exiting to atmospheric pressure conditions. The experimental results of the completed DDG tests presented in this paper validate the predicted results to within a reasonable margin of error. These tests have resulted in a re-design of the flow annulus to reduce the pressure drop. Subsequent tests will be conducted with the re-designed flow channel and with the outlet pressure held at 150 psi (1 MPa). Design of a similar test for a nominal flow channel in the HPR heat exchanger (HPR-HX) has been completed and hardware is currently being assembled for testing this channel at 150 psi. When completed, these test programs will provide the data necessary to validate calculated flow performance for these reactor concepts (pressure drop and film temperature rise)

  7. An in vitro study of gas exchanges in cultures of Phymatotrichum omnivorum (Shear) Duggar

    E-Print Network [OSTI]

    Hill, Thomas Fielding

    1972-01-01T23:59:59.000Z

    in Cultures of Ph atotrichum omnivorum (Shear) Duggar. (August 19(2) Thomas Fielding Hill, Jr. , B. A. Sam Houston State Directed by: Dr. Stuart D. Lyda Cultures of Ph atotrichum omnivorum grown in glass culture flasks on a d. efined medium were monl... the cultures were analyzed us1ng Beckman GC-4 and GC-5 gas chromatographs. Carbon d1oxide, 02 and N2 concentrations were determined at 48-hr intervals while ethylene concentrations were determ1ned at 24-hr intervals. Strand and sclerotial initials were...

  8. Uncertainties in Air Exchange using Continuous-Injection, Long-Term Sampling Tracer-Gas Methods

    SciTech Connect (OSTI)

    Sherman, Max H.; Walker, Iain S.; Lunden, Melissa M.

    2013-12-01T23:59:59.000Z

    The PerFluorocarbon Tracer (PFT) method is a low-cost approach commonly used for measuring air exchange in buildings using tracer gases. It is a specific application of the more general Continuous-Injection, Long-Term Sampling (CILTS) method. The technique is widely used but there has been little work on understanding the uncertainties (both precision and bias) associated with its use, particularly given that it is typically deployed by untrained or lightly trained people to minimize experimental costs. In this article we will conduct a first-principles error analysis to estimate the uncertainties and then compare that analysis to CILTS measurements that were over-sampled, through the use of multiple tracers and emitter and sampler distribution patterns, in three houses. We find that the CILTS method can have an overall uncertainty of 10-15percent in ideal circumstances, but that even in highly controlled field experiments done by trained experimenters expected uncertainties are about 20percent. In addition, there are many field conditions (such as open windows) where CILTS is not likely to provide any quantitative data. Even avoiding the worst situations of assumption violations CILTS should be considered as having a something like a ?factor of two? uncertainty for the broad field trials that it is typically used in. We provide guidance on how to deploy CILTS and design the experiment to minimize uncertainties.

  9. Development and implementation of a FT-ICR mass spectrometer for the investigation of ion conformations of peptide sequence isomers containing basic amino acid residues by gas-phase hydrogen/deuterium exchange 

    E-Print Network [OSTI]

    Marini, Joseph Thomas

    2004-09-30T23:59:59.000Z

    The gas-phase hydrogen/deuterium (H/D) exchange of protonated di- and tripeptides containing a basic amino acid residue has been studied with a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. Bimolecular reactions...

  10. Development and implementation of a FT-ICR mass spectrometer for the investigation of ion conformations of peptide sequence isomers containing basic amino acid residues by gas-phase hydrogen/deuterium exchange

    E-Print Network [OSTI]

    Marini, Joseph Thomas

    2004-09-30T23:59:59.000Z

    The gas-phase hydrogen/deuterium (H/D) exchange of protonated di- and tripeptides containing a basic amino acid residue has been studied with a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. Bimolecular reactions...

  11. Temperature-Dependent Simulations of Dry Gas Transport in the Electrodes of Proton Exchange Membrane Fuel Cells

    E-Print Network [OSTI]

    Stockie, John

    Membrane Fuel Cells M. J. Kermani1 J. M. Stockie2 mkermani@unb.ca stockie@unb.ca 1 Post Doctoral Fellow the cathode of a proton exchange membrane (PEM) fuel cell is studied numerically. The di usion to achieve this goal is via proton exchange mem- brane (PEM) fuel cells, which in principle combine oxygen

  12. Elm Leaf Beetle

    E-Print Network [OSTI]

    Patrick, Carl D.

    2002-05-22T23:59:59.000Z

    Elm leaf beetles damage all varieties of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of insecticides effective against...

  13. A corrosive resistant heat exchanger

    DOE Patents [OSTI]

    Richlen, S.L.

    1987-08-10T23:59:59.000Z

    A corrosive and erosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is pumped through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium. 3 figs., 3 tabs.

  14. Technical Report: Impacts of Land Management and Climate on Agroecosystem Greenhouse Gas Exchange in the Upper Midwest United States

    SciTech Connect (OSTI)

    Timothy J. Griffis; John M. Baker

    2007-07-01T23:59:59.000Z

    Our research is designed to improve the scientific understanding of how carbon is cycled between the land and atmosphere within a heavily managed landscape that is characteristic of the Upper Midwest. The Objectives are: 1) Quantify the seasonal and interannual variation of net ecosystem CO2 exchange of agricultural ecosystems in the Upper Midwest grown under different management strategies; 2) Partition net ecosystem CO2 exchange into photosynthesis and ecosystem respiration by combining micrometeorological and stable isotope techniques; 3) Examine the seasonal variation in canopy-scale photosynthetic discrimination and the isotope ratios of ecosystem respiration and photosynthesis.

  15. Isothermal Ice-Crystallization Kinetics in the Gas-Diffusion Layer of a Proton-Exchange-Membrane Fuel Cell

    E-Print Network [OSTI]

    Dursch, Thomas J.

    2013-01-01T23:59:59.000Z

    l water O oxidized carbon s ice T PTFE dry dry gas-diffusioncrystallization) to form 99% of ice using eq 10 with k T (of California. Isothermal Ice-Crystallization Kinetics in

  16. Air-sea gas exchange of CO 2 and DMS in the North Atlantic by eddy covariance

    E-Print Network [OSTI]

    Miller, Scott D; Marandino, Christa A; De Bruyn, Warren; Saltzman, Eric S; McCormick, C.

    2009-01-01T23:59:59.000Z

    measurements of the air/sea flux of dimethylsulfide over the2008a), Open ocean DMS air/sea fluxes over the eastern SouthE. S. Saltzman (2008b), DMS air/sea flux and gas transfer

  17. The effects of phosphorous ligands on the gas phase ligand exchange reactions of dichromium ionic cluster fragments

    E-Print Network [OSTI]

    Nguyen, Hanh Duc

    1991-01-01T23:59:59.000Z

    ligands have been investigated by Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR). This work demonstrates that the rates for disappearance of Cr, (CO)?' (y = 5-6) by ligand exchange reactions with phosphorus ligands depend... cyclotron resonance mass spectrometer (FT-ICR). FT-ICR is a particularly valuable technique for studying ion-molecule reaction chemistry because the experimental sequences are separated in time, not in space. Mass selective isolation of ions can...

  18. Applications of radon distribution and radon flux for the determination of oceanic mixing and air-sea gas exchange

    E-Print Network [OSTI]

    Brewer, Robert Lewis

    1977-01-01T23:59:59.000Z

    APPLICATIONS OF RADON DISTRIBUTION AND RADON FLUX FOR THE DETERS 1INATION Ol OCEANIC IvfIXING AND AIR -SEA GAS EXCHA NGE A Thesis by ROBERT I. EWIS BREWER Submitted to the Graduate College oi T e xa s A '4 I'. 1 Univ c r s i ty in partial... luiiillment of the requirement for the degree of KIASTER OF SCIENCE May 1977 Major Subject: Oceanography APPLICATIONS OF RADON DIS TBIBUTION AND RADON FLUX FOR THE DETERMINATION OF OCEANIC MIXING A ND AIR ? SEA GAS EXCIdA NGE A Thesis by ROBERT LEWIS...

  19. Evanescent straight tapered-fiber coupling of ultra-high Q optomechanical micro-resonators in a low-vibration helium-4 exchange-gas cryostat

    E-Print Network [OSTI]

    Rivière, R; Schliesser, A; Kippenberg, T J

    2013-01-01T23:59:59.000Z

    We developed an apparatus to couple a 50-micrometer diameter whispering-gallery silica microtoroidal resonator in a helium-4 cryostat using a straight optical tapered-fiber at 1550nm wavelength. On a top-loading probe specifically adapted for increased mechanical stability, we use a specifically-developed "cryotaper" to optically probe the cavity, allowing thus to record the calibrated mechanical spectrum of the optomechanical system at low temperatures. We then demonstrate excellent thermalization of a 63-MHz mechanical mode of a toroidal resonator down to the cryostat's base temperature of 1.65K, thereby proving the viability of the cryogenic refrigeration via heat conduction through static low-pressure exchange gas. In the context of optomechanics, we therefore provide a versatile and powerful tool with state-of-the-art performances in optical coupling efficiency, mechanical stability and cryogenic cooling.

  20. ESTIMATION OF RADIOLYTIC GAS GENERATION RATE FOR CYLINDRICAL RADIOACTIVE WASTE PACKAGES - APPLICATION TO SPENT ION EXCHANGE RESIN CONTAINERS

    SciTech Connect (OSTI)

    Husain, A.; Lewis, Brent J.

    2003-02-27T23:59:59.000Z

    Radioactive waste packages containing water and/or organic substances have the potential to radiolytically generate hydrogen and other combustible gases. Typically, the radiolytic gas generation rate is estimated from the energy deposition rate and the radiolytic gas yield. Estimation of the energy deposition rate must take into account the contributions from all radionuclides. While the contributions from non-gamma emitting radionuclides are relatively easy to estimate, an average geometry factor must be computed to determine the contribution from gamma emitters. Hitherto, no satisfactory method existed for estimating the geometry factors for a cylindrical package. In the present study, a formulation was developed taking into account the effect of photon buildup. A prototype code, called PC-CAGE, was developed to numerically solve the integrals involved. Based on the selected dimensions for a cylinder, the specified waste material, the photon energy of interest and a value for either the absorption or attenuation coefficient, the code outputs values for point and average geometry factors. These can then be used to estimate the internal dose rate to the material in the cylinder and hence to calculate the radiolytic gas generation rate. Besides the ability to estimate the rates of radiolytic gas generation, PC-CAGE can also estimate the dose received by the container material. This is based on values for the point geometry factors at the surface of the cylinder. PC-CAGE was used to calculate geometry factors for a number of cylindrical geometries. Estimates for the absorbed dose rate in container material were also obtained. The results for Ontario Power Generation's 3 m3 resin containers indicate that about 80% of the source gamma energy is deposited internally. In general, the fraction of gamma energy deposited internally depends on the dimensions of the cylinder, the material within it and the photon energy; the fraction deposited increases with increasing dimensions of the cylinder and decreases with increasing photon energy.

  1. Variation in soil moisture and N availability modulates carbon and water exchange in a California grassland experiment

    SciTech Connect (OSTI)

    St. Clair, S.B.; Sudderth, E.; Fischer, M.L.; Torn, M.S.; Stuart, S.; Salve, R.; Eggett, D.; Ackerly, D.

    2009-03-15T23:59:59.000Z

    Variability in the magnitude and timing of precipitation is predicted to change under future climate scenarios. The primary objective of this study was to understand how variation in precipitation patterns consisting of soil moisture pulses mixed with intermittent dry down events influence ecosystem gas fluxes. We characterized the effects of precipitation amount and timing, N availability, and plant community composition on whole ecosystem and leaf gas exchange in a California annual grassland mesocosm study system that allowed precise control of soil moisture conditions. Ecosystem CO2 and fluxes increased significantly with greater precipitation and were positively correlated with soil moisture. A repeated 10 day dry down period following 11 days of variable precipitation inputs strongly depressed net ecosystem CO2 exchange (NEE) across a range of season precipitation totals, and plant community types. Ecosystem respiration (Re), evapotranspiration (ET) and leaf level photosynthesis (Amax) showed greatest sensitivity to dry down periods in low precipitation plots. Nitrogen additions significantly increased NEE, Re and Amax, particularly as water availability was increased. These results demonstrate that N availability and intermittent periods of soil moisture deficit (across a wide range of cumulative season precipitation totals) strongly modulate ecosystem gas exchange.

  2. Effects of environmental parameters, leaf physiological properties and leaf water relations on leaf water d18

    E-Print Network [OSTI]

    Tu, Kevin

    properties and leaf water relations as drivers of the isotopic enrichment of leaf water across 17 Eucalyptus that the enrichment of the heavier oxygen isotope (18 O) in the leaf water and the subsequent photoassimilates formed and ecosystem bio- geochemistry. Isotopic leaf water enrichment can, for example, be related to a plant's water

  3. Heat and mass exchanger

    DOE Patents [OSTI]

    Lowenstein, Andrew (Princeton, NJ); Sibilia, Marc J. (Princeton, NJ); Miller, Jeffrey A. (Hopewell, NJ); Tonon, Thomas (Princeton, NJ)

    2007-09-18T23:59:59.000Z

    A mass and heat exchanger includes at least one first substrate with a surface for supporting a continuous flow of a liquid thereon that either absorbs, desorbs, evaporates or condenses one or more gaseous species from or to a surrounding gas; and at least one second substrate operatively associated with the first substrate. The second substrate includes a surface for supporting the continuous flow of the liquid thereon and is adapted to carry a heat exchange fluid therethrough, wherein heat transfer occurs between the liquid and the heat exchange fluid.

  4. Heat and mass exchanger

    DOE Patents [OSTI]

    Lowenstein, Andrew (Princeton, NJ); Sibilia, Marc J. (Princeton, NJ); Miller, Jeffrey A. (Hopewell, NJ); Tonon, Thomas (Princeton, NJ)

    2011-06-28T23:59:59.000Z

    A mass and heat exchanger includes at least one first substrate with a surface for supporting a continuous flow of a liquid thereon that either absorbs, desorbs, evaporates or condenses one or more gaseous species from or to a surrounding gas; and at least one second substrate operatively associated with the first substrate. The second substrate includes a surface for supporting the continuous flow of the liquid thereon and is adapted to carry a heat exchange fluid therethrough, wherein heat transfer occurs between the liquid and the heat exchange fluid.

  5. adjustment ion exchange: Topics by E-print Network

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

    of intra-molecular interactions on the gas-phase conformation of peptides as probed by ion mobility-mass spectrometry, gas-phase hydrogendeuterium exchange, and molecular...

  6. argentine ion exchange: Topics by E-print Network

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

    of intra-molecular interactions on the gas-phase conformation of peptides as probed by ion mobility-mass spectrometry, gas-phase hydrogendeuterium exchange, and molecular...

  7. Leaf-to-leaf distances in Catalan tree graphs

    E-Print Network [OSTI]

    Andrew M. Goldsborough; Jonathan M. Fellows; Matthew Bates; S. Alex Rautu; George Rowlands; Rudolf A. Römer

    2015-03-02T23:59:59.000Z

    We study the average leaf-to-leaf path lengths on ordered Catalan tree graphs with $n$ nodes and show that these are equivalent to the average length of paths starting from the root node. We give an explicit analytic formula for the average leaf-to-leaf path length as a function of separation of the leaves and study its asymptotic properties. At the heart of our method is a strategy based on an abstract graph representation of generating functions which we hope can be useful also in other contexts.

  8. Williams et al. Chapter 6 : CO2 capture from the leaf to the landscape

    E-Print Network [OSTI]

    area (m2 ), P is atmospheric pressure (Pa), R the gas constant, TK absolute temperature and d stomatal conductance from that of an individual stoma to the whole leaf using theoretical considerations

  9. Leaf Modeling and Constrained Leaf Morphing in Leaf Space Saurabh Garg1

    E-Print Network [OSTI]

    Leow, Wee Kheng

    , and structure of the leaves among different species of plants. The main draw- back of existing methods. In this paper, we present a novel parametric leaf model based on botanical considerations for generating is generated by fitting quadratic B-spline curves to the landmark points and tangents. The proposed leaf model

  10. Preparation of ammonia synthesis gas

    SciTech Connect (OSTI)

    Shires, P.J.; van Dijk, C.P.; Cassata, J.R.; Mandelik, B.G.

    1984-10-30T23:59:59.000Z

    Ammonia synthesis gas having excess nitrogen is produced in a reactor-exchanger primary reformer followed by an autothermal secondary reformer wherein process air for the latter is preheated by heat exchange with gas turbine exhaust and the primary reformer is heated by synthesis gas from the secondary reformer.

  11. Leaf-wax n-alkanes record the plantwater environment at leaf ush

    E-Print Network [OSTI]

    Tipple, Brett

    Leaf-wax n-alkanes record the plant­water environment at leaf ush Brett J. Tipple1 , Melissa A, UT, and approved December 26, 2012 (received for review August 13, 2012) Leaf-wax n-alkanes 2 H/1 H the 2 H values of leaf-wax n-alkanes and of stem, leaf, stream, and atmospheric waters throughout

  12. A Plastic-Core Compact Heat Exchanger for Energy Conservation

    E-Print Network [OSTI]

    Lazaridis, A.; Rafailidis, E.

    This paper describes a compact, single-pass, cross-flow type, gas-to-gas heat exchanger with a polyolefin (polyethylene or polypropylene) core whose seams are welded through a proprietary process. It is constructed of several extruded polyolefin...

  13. A Plastic-Core Compact Heat Exchanger for Energy Conservation 

    E-Print Network [OSTI]

    Lazaridis, A.; Rafailidis, E.

    1995-01-01T23:59:59.000Z

    This paper describes a compact, single-pass, cross-flow type, gas-to-gas heat exchanger with a polyolefin (polyethylene or polypropylene) core whose seams are welded through a proprietary process. It is constructed of several extruded polyolefin...

  14. Short communication Leaf optical properties and photosynthetic leaf absorptances

    E-Print Network [OSTI]

    Durako, Michael J.

    (PAR) values ranged from 45 Æ 3% for H. ovalis from a shallow (1 m) open coastal site in Western Australia of Australia. Leaf spectral transmittance [TL(l)], reflectance [RL(l)], and non-photosynthetic absorptance [AL species and sites. P. coriacea, a seagrass characteristic of high energy environments with the most

  15. Leaf endophyte load influences fungal garden development in leaf-cutting ants

    E-Print Network [OSTI]

    Bermingham, Eldredge

    Leaf endophyte load influences fungal garden development in leaf-cutting ants Van Bael et al. Van Open Access Leaf endophyte load influences fungal garden development in leaf-cutting ants Sunshine with relatively low fungal endophyte content. This preference suggests that fungal endophytes exact a cost

  16. Original article Photosynthesis, leaf area and productivity

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Original article Photosynthesis, leaf area and productivity of 5 poplar clones during; The stem volume and biomass (stem + branches) production, net photosynthesis of mature leaves and leaf area found in volume production, woody biomass production, total leaf area and net photosynthesis. Above

  17. ORIGINAL PAPER Leaf wax d2

    E-Print Network [OSTI]

    Briner, Jason P.

    ORIGINAL PAPER Leaf wax d2 H and varve-thickness climate proxies from proglacial lake sediments Science+Business Media B.V. 2012 Abstract We present a multiproxy paleoclimate record using leaf wax Á Leaf wax Á Proglacial lake Á Varve Introduction Arctic proglacial lake sediments are excellent

  18. Flue gas desulfurization

    DOE Patents [OSTI]

    Im, K.H.; Ahluwalia, R.K.

    1984-05-01T23:59:59.000Z

    The invention involves a combustion process in which combustion gas containing sulfur oxide is directed past a series of heat exchangers to a stack and in which a sodium compound is added to the combustion gas in a temparature zone of above about 1400 K to form Na/sub 2/SO/sub 4/. Preferably, the temperature is above about 1800 K and the sodium compound is present as a vapor to provide a gas-gas reaction to form Na/sub 2/SO/sub 4/ as a liquid. Since liquid Na/sub 2/SO/sub 4/ may cause fouling of heat exchanger surfaces downstream from the combustion zone, the process advantageously includes the step of injecting a cooling gas downstream of the injection of the sodium compound yet upstream of one or more heat exchangers to cool the combustion gas to below about 1150 K and form solid Na/sub 2/SO/sub 4/. The cooling gas is preferably a portion of the combustion gas downstream which may be recycled for cooling. It is further advantageous to utilize an electrostatic precipitator downstream of the heat exchangers to recover the Na/sub 2/SO/sub 4/. It is also advantageous in the process to remove a portion of the combustion gas cleaned in the electrostatic precipitator and recycle that portion upstream to use as the cooling gas. 3 figures.

  19. Agriculture on Exchange InternationalExchangeProgram

    E-Print Network [OSTI]

    Viglas, Anastasios

    Agriculture on Exchange InternationalExchangeProgram Students enrolled in courses offered through the Faculty of Agriculture and Environment are welcome to apply for exchange. However, to ensure that you Academic Adviser before submitting an exchange application. Undergraduate Agriculture students normally go

  20. Segmented heat exchanger

    DOE Patents [OSTI]

    Baldwin, Darryl Dean (Lafayette, IN); Willi, Martin Leo (Dunlap, IL); Fiveland, Scott Byron (Metamara, IL); Timmons, Kristine Ann (Chillicothe, IL)

    2010-12-14T23:59:59.000Z

    A segmented heat exchanger system for transferring heat energy from an exhaust fluid to a working fluid. The heat exchanger system may include a first heat exchanger for receiving incoming working fluid and the exhaust fluid. The working fluid and exhaust fluid may travel through at least a portion of the first heat exchanger in a parallel flow configuration. In addition, the heat exchanger system may include a second heat exchanger for receiving working fluid from the first heat exchanger and exhaust fluid from a third heat exchanger. The working fluid and exhaust fluid may travel through at least a portion of the second heat exchanger in a counter flow configuration. Furthermore, the heat exchanger system may include a third heat exchanger for receiving working fluid from the second heat exchanger and exhaust fluid from the first heat exchanger. The working fluid and exhaust fluid may travel through at least a portion of the third heat exchanger in a parallel flow configuration.

  1. Stand-Level Gas-Exchange Responses to Seasonal Drought in Very Young Versus Old Douglas-fir Forests of the Pacific Northwest, USA

    SciTech Connect (OSTI)

    Wharton, S; Schroeder, M; Bible, K; Falk, M; Paw U, K T

    2009-02-23T23:59:59.000Z

    This study examines how stand age affects ecosystem mass and energy exchange response to seasonal drought in three adjacent Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests. The sites include two early seral stands (ES) (0-15 years old) and an old-growth (OG) ({approx} 450-500) forest in the Wind River Experiment Forest, Washington, USA. We use eddy covariance flux measurements of carbon dioxide (F{sub NEE}), latent energy ({lambda}E) and sensible heat (H) to derive evapotranspiration rate (E{sub T}), bowen ratio ({beta}), water use efficiency (WUE), canopy conductance (G{sub c}), the Priestley-Taylor coefficient ({alpha}) and a canopy decoupling factor ({Omega}). The canopy and bulk parameters are examined to see how ecophysiological responses to water stress, including changes in available soil water ({theta}{sub r}) and vapor pressure deficit ({delta}e) differ among the two forest successional-stages. Despite very different rainfall patterns in 2006 and 2007, we observed distinct successional-stage relationships between E{sub T}, {alpha}, and G{sub c} to {delta}e and {theta}{sub r} during both years. The largest stand differences were (1) higher morning G{sub c} (> 10 mm s{sup -1}) at the OG forest coinciding with higher CO{sub 2} uptake (F{sub NEE} = -9 to -6 {micro}mol m{sup -2} s{sup -1}) but a strong negative response in G{sub c} to moderate {delta}e later in the day and a subsequent reduction in E{sub T}, and (2) higher E{sub T} at the ES stands because midday canopy conductance did not decrease until very low water availability levels (<30%) were reached at the end of the summer. Our results suggest that early seral stands are more likely than mature forests to experience declines in production if the summer drought becomes longer or intensifies because water conserving ecophysiological responses were only observed at the very end of the seasonal drought period in the youngest stands.

  2. Summary Leaf area index (LAI) is a key biophysical vari-able in most process-based forest-ecosystem models. How-

    E-Print Network [OSTI]

    Minnesota, University of

    the Ad- vanced Very High Resolution Radiometer (AVHRR) satel- lite-borne sensor of surface greenness). Because of the strong influence of leaf area on rates of canopy gas ex- change and energy balance, efforts

  3. Yield and leaf blade area comparisons of extra leafy to normal leafed maize (Zea mays L.) 

    E-Print Network [OSTI]

    Rushing, Ronald Wayne

    1996-01-01T23:59:59.000Z

    relationships between extra leaf production and rain yield of the leafy 9 hybrids. Fourteen hybrids were compared, including, eight Lfy and six normal-leafed industry standard hybrids. The fourteen hybrids were replicated four times in a randomized block design...

  4. Yield and leaf blade area comparisons of extra leafy to normal leafed maize (Zea mays L.)

    E-Print Network [OSTI]

    Rushing, Ronald Wayne

    1996-01-01T23:59:59.000Z

    relationships between extra leaf production and rain yield of the leafy 9 hybrids. Fourteen hybrids were compared, including, eight Lfy and six normal-leafed industry standard hybrids. The fourteen hybrids were replicated four times in a randomized block design...

  5. A direct and rapid leaf water extraction method for isotopic analysis

    E-Print Network [OSTI]

    Yakir, Dan

    Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, Rehovot, Israel for isotopic analysis via pyrolysis gas chromatography isotope ratio mass spectrometry (PYR/GC/IRMS). The new-scale studies that require high-throughput leaf water isotopic analysis. Copyright # 2008 John Wiley & Sons, Ltd

  6. Heat exchanger with transpired, highly porous fins

    DOE Patents [OSTI]

    Kutscher, Charles F. (Golden, CO); Gawlik, Keith (Boulder, CO)

    2002-01-01T23:59:59.000Z

    The heat exchanger includes a fin and tube assembly with increased heat transfer surface area positioned within a hollow chamber of a housing to provide effective heat transfer between a gas flowing within the hollow chamber and a fluid flowing in the fin and tube assembly. A fan is included to force a gas, such as air, to flow through the hollow chamber and through the fin and tube assembly. The fin and tube assembly comprises fluid conduits to direct the fluid through the heat exchanger, to prevent mixing with the gas, and to provide a heat transfer surface or pathway between the fluid and the gas. A heat transfer element is provided in the fin and tube assembly to provide extended heat transfer surfaces for the fluid conduits. The heat transfer element is corrugated to form fins between alternating ridges and grooves that define flow channels for directing the gas flow. The fins are fabricated from a thin, heat conductive material containing numerous orifices or pores for transpiring the gas out of the flow channel. The grooves are closed or only partially open so that all or substantially all of the gas is transpired through the fins so that heat is exchanged on the front and back surfaces of the fins and also within the interior of the orifices, thereby significantly increasing the available the heat transfer surface of the heat exchanger. The transpired fins also increase heat transfer effectiveness of the heat exchanger by increasing the heat transfer coefficient by disrupting boundary layer development on the fins and by establishing other beneficial gas flow patterns, all at desirable pressure drops.

  7. Oscillating side-branch enhancements of thermoacoustic heat exchangers

    DOE Patents [OSTI]

    Swift, Gregory W.

    2003-05-13T23:59:59.000Z

    A regenerator-based engine or refrigerator has a regenerator with two ends at two different temperatures, through which a gas oscillates at a first oscillating volumetric flow rate in the direction between the two ends and in which the pressure of the gas oscillates, and first and second heat exchangers, each of which is at one of the two different temperatures. A dead-end side branch into which the gas oscillates has compliance and is connected adjacent to one of the ends of the regenerator to form a second oscillating gas flow rate additive with the first oscillating volumetric flow rate, the compliance having a volume effective to provide a selected total oscillating gas volumetric flow rate through the first heat exchanger. This configuration enables the first heat exchanger to be configured and located to better enhance the performance of the heat exchanger rather than being confined to the location and configuration of the regenerator.

  8. Low exchange element for nuclear reactor

    DOE Patents [OSTI]

    Brogli, Rudolf H. (Aarau, CH); Shamasunder, Bangalore I. (Encinitas, CA); Seth, Shivaji S. (Encinitas, CA)

    1985-01-01T23:59:59.000Z

    A flow exchange element is presented which lowers temperature gradients in fuel elements and reduces maximum local temperature within high temperature gas-cooled reactors. The flow exchange element is inserted within a column of fuel elements where it serves to redirect coolant flow. Coolant which has been flowing in a hotter region of the column is redirected to a cooler region, and coolant which has been flowing in the cooler region of the column is redirected to the hotter region. The safety, efficiency, and longevity of the high temperature gas-cooled reactor is thereby enhanced.

  9. Woven heat exchanger

    DOE Patents [OSTI]

    Piscitella, R.R.

    1984-07-16T23:59:59.000Z

    This invention relates to a heat exchanger for waste heat recovery from high temperature industrial exhaust streams. In a woven ceramic heat exchanger using the basic tube-in-shell design, each heat exchanger consisting of tube sheets and tube, is woven separately. Individual heat exchangers are assembled in cross-flow configuration. Each heat exchanger is woven from high temperature ceramic fiber, the warp is continuous from tube to tube sheet providing a smooth transition and unitized construction.

  10. Gas Hydrate Storage of Natural Gas

    SciTech Connect (OSTI)

    Rudy Rogers; John Etheridge

    2006-03-31T23:59:59.000Z

    Environmental and economic benefits could accrue from a safe, above-ground, natural-gas storage process allowing electric power plants to utilize natural gas for peak load demands; numerous other applications of a gas storage process exist. A laboratory study conducted in 1999 to determine the feasibility of a gas-hydrates storage process looked promising. The subsequent scale-up of the process was designed to preserve important features of the laboratory apparatus: (1) symmetry of hydrate accumulation, (2) favorable surface area to volume ratio, (3) heat exchanger surfaces serving as hydrate adsorption surfaces, (4) refrigeration system to remove heat liberated from bulk hydrate formation, (5) rapid hydrate formation in a non-stirred system, (6) hydrate self-packing, and (7) heat-exchanger/adsorption plates serving dual purposes to add or extract energy for hydrate formation or decomposition. The hydrate formation/storage/decomposition Proof-of-Concept (POC) pressure vessel and supporting equipment were designed, constructed, and tested. This final report details the design of the scaled POC gas-hydrate storage process, some comments on its fabrication and installation, checkout of the equipment, procedures for conducting the experimental tests, and the test results. The design, construction, and installation of the equipment were on budget target, as was the tests that were subsequently conducted. The budget proposed was met. The primary goal of storing 5000-scf of natural gas in the gas hydrates was exceeded in the final test, as 5289-scf of gas storage was achieved in 54.33 hours. After this 54.33-hour period, as pressure in the formation vessel declined, additional gas went into the hydrates until equilibrium pressure/temperature was reached, so that ultimately more than the 5289-scf storage was achieved. The time required to store the 5000-scf (48.1 hours of operating time) was longer than designed. The lower gas hydrate formation rate is attributed to a lower heat transfer rate in the internal heat exchanger than was designed. It is believed that the fins on the heat-exchanger tubes did not make proper contact with the tubes transporting the chilled glycol, and pairs of fins were too close for interior areas of fins to serve as hydrate collection sites. A correction of the fabrication fault in the heat exchanger fin attachments could be easily made to provide faster formation rates. The storage success with the POC process provides valuable information for making the process an economically viable process for safe, aboveground natural-gas storage.

  11. acidic ion exchange: Topics by E-print Network

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

    of the chlorine ion in freezing salt on the corrosion behavior of automobile IF steel in boric acid buffer solution with different chloride ions Volinsky, Alex A. 157 GAS EXCHANGE...

  12. Recovery of Water from Boiler Flue Gas

    SciTech Connect (OSTI)

    Edward Levy; Harun Bilirgen; Kwangkook Jeong; Michael Kessen; Christopher Samuelson; Christopher Whitcombe

    2008-09-30T23:59:59.000Z

    This project dealt with use of condensing heat exchangers to recover water vapor from flue gas at coal-fired power plants. Pilot-scale heat transfer tests were performed to determine the relationship between flue gas moisture concentration, heat exchanger design and operating conditions, and water vapor condensation rate. The tests also determined the extent to which the condensation processes for water and acid vapors in flue gas can be made to occur separately in different heat transfer sections. The results showed flue gas water vapor condensed in the low temperature region of the heat exchanger system, with water capture efficiencies depending strongly on flue gas moisture content, cooling water inlet temperature, heat exchanger design and flue gas and cooling water flow rates. Sulfuric acid vapor condensed in both the high temperature and low temperature regions of the heat transfer apparatus, while hydrochloric and nitric acid vapors condensed with the water vapor in the low temperature region. Measurements made of flue gas mercury concentrations upstream and downstream of the heat exchangers showed a significant reduction in flue gas mercury concentration within the heat exchangers. A theoretical heat and mass transfer model was developed for predicting rates of heat transfer and water vapor condensation and comparisons were made with pilot scale measurements. Analyses were also carried out to estimate how much flue gas moisture it would be practical to recover from boiler flue gas and the magnitude of the heat rate improvements which could be made by recovering sensible and latent heat from flue gas.

  13. INTRODUCTION Insects exchange respiratory gases through a complex network of

    E-Print Network [OSTI]

    Socha, Jake

    3409 INTRODUCTION Insects exchange respiratory gases through a complex network of tracheal tubes through the tracheal system using diffusion alone (Krogh, 1920a; Weis-Fogh, 1964), many species are known to augment gas exchange using convection (Buck, 1962; Miller, 1966a). Two general mechanisms are recognized

  14. Heat exchanger for coal gasification process

    DOE Patents [OSTI]

    Blasiole, George A. (Greensburg, PA)

    1984-06-19T23:59:59.000Z

    This invention provides a heat exchanger, particularly useful for systems requiring cooling of hot particulate solids, such as the separated fines from the product gas of a carbonaceous material gasification system. The invention allows effective cooling of a hot particulate in a particle stream (made up of hot particulate and a gas), using gravity as the motive source of the hot particulate. In a preferred form, the invention substitutes a tube structure for the single wall tube of a heat exchanger. The tube structure comprises a tube with a core disposed within, forming a cavity between the tube and the core, and vanes in the cavity which form a flow path through which the hot particulate falls. The outside of the tube is in contact with the cooling fluid of the heat exchanger.

  15. Energy Exchange News

    Broader source: Energy.gov [DOE]

    Please join FEMP Director Tim Unruh and Julia Kelley with Oak Ridge National Laboratory (ORNL) for a presentation on the Energy Exchange. The Energy Exchange is a new 2 1/2 day training opportunity...

  16. Anion exchange polymer electrolytes

    DOE Patents [OSTI]

    Kim, Yu Seung; Kim, Dae Sik

    2013-09-10T23:59:59.000Z

    Solid anion exchange polymer electrolytes include chemical compounds comprising a polymer backbone with side chains that include guanidinium cations.

  17. Energy-Exchange Project

    SciTech Connect (OSTI)

    Not Available

    1982-04-01T23:59:59.000Z

    The purpose of the study was to determine what energy savings can be achieved by coordinating the resources and requirements of two facilities, the 26th Ward Water Pollution Control Plant (WPCP) and a housing development named Starrett City with its own total energy system. It was determined that three energy exchange options were economically and technically feasible. These include: the transfer of digester gas produced at the 26th Ward to the boilers at the Starrett City's total energy plant (TEP); the transfer of hot water heated at the TEP to the 26th Ward for space and process heating; and the transfer of coal effluent waste water from the 26th Ward to the condenser cooling systems at the TEP. Technical information is presented to support the findings. The report addresses those tasks of the statement of work dedicated to data acquisition, analysis, and energy conservation strategies internal to the Starrett City TEP and the community it supplies as well as to the 26th Ward WPCP. (MCW)

  18. Energy Exchange | Department of Energy

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

    Exchange Energy Exchange Energy Exchange August 11-13, 2015, Phoenix Convention Center The 2015 Energy Exchange in Phoenix, Arizona, is being launched to provide two-and-a-half...

  19. Heat exchanger for fuel cell power plant reformer

    DOE Patents [OSTI]

    Misage, Robert (Manchester, CT); Scheffler, Glenn W. (Tolland, CT); Setzer, Herbert J. (Ellington, CT); Margiott, Paul R. (Manchester, CT); Parenti, Jr., Edmund K. (Manchester, CT)

    1988-01-01T23:59:59.000Z

    A heat exchanger uses the heat from processed fuel gas from a reformer for a fuel cell to superheat steam, to preheat raw fuel prior to entering the reformer and to heat a water-steam coolant mixture from the fuel cells. The processed fuel gas temperature is thus lowered to a level useful in the fuel cell reaction. The four temperature adjustments are accomplished in a single heat exchanger with only three heat transfer cores. The heat exchanger is preheated by circulating coolant and purge steam from the power section during startup of the latter.

  20. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103, NO. D24, PAGES 32,257-32,276, JANUARY 27, 1998 Synergistic algorithm for estimating vegetation canopy leaf

    E-Print Network [OSTI]

    Myneni, Ranga B.

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103, NO. D24, PAGES 32,257-32,276, JANUARY 27, 1998 32257 communities across the globe in response to climate changes. Leaf area index (LAI) is a state parameter in all models describing the exchange of fluxes of energy, mass (e.g., water and CO2), and momentum between

  1. Autothermal production of synthesis gas

    SciTech Connect (OSTI)

    Lewis, J.L.

    1987-05-19T23:59:59.000Z

    An autothermal reactor is described for the production of a synthesis gas in which both primary reforming and secondary reforming are achieved at a high level of efficiency. The method comprises a heat exchange chamber having a first portion and a second portion, a first inlet connected to the heat exchange chamber for the introduction of steam and feed gas to the heat exchange chamber, reaction tubes mounted within the first portion of the heat exchanger chamber at a location spaced longitudinally from the first inlet in communication with the first inlet and in non-concentric relationship therewith so as to provide a flow path for the steam and feed gas from the first inlet through the plurality of reaction tubes.

  2. Experimental Evaluation of a Model for Oxygen Exchange in a Pulsating Intravascular Artificial Lung

    E-Print Network [OSTI]

    Federspiel, William J.

    Experimental Evaluation of a Model for Oxygen Exchange in a Pulsating Intravascular Artificial Lung an intravascular hollow fiber artificial lung that uses a pulsating balloon located within the fiber bundle in pulsating intravascular artificial lungs. In this study we evaluate the O2 exchange model with gas exchange

  3. Circulating heat exchangers for oscillating wave engines and refrigerators

    DOE Patents [OSTI]

    Swift, Gregory W.; Backhaus, Scott N.

    2003-10-28T23:59:59.000Z

    An oscillating-wave engine or refrigerator having a regenerator or a stack in which oscillating flow of a working gas occurs in a direction defined by an axis of a trunk of the engine or refrigerator, incorporates an improved heat exchanger. First and second connections branch from the trunk at locations along the axis in selected proximity to one end of the regenerator or stack, where the trunk extends in two directions from the locations of the connections. A circulating heat exchanger loop is connected to the first and second connections. At least one fluidic diode within the circulating heat exchanger loop produces a superimposed steady flow component and oscillating flow component of the working gas within the circulating heat exchanger loop. A local process fluid is in thermal contact with an outside portion of the circulating heat exchanger loop.

  4. Chicago Climate Exchange, Inc. 2010 Chicago Climate Exchange 1 The Role of Exchanges and Standardization

    E-Print Network [OSTI]

    Chicago Climate Exchange®, Inc.© 2010 Chicago Climate Exchange 1 The Role of Exchanges and Standardization in Reducing Emissions at Scale Michael J. Walsh, Ph.D. Executive Vice President Chicago Climate Exchange, Inc. #12;Chicago Climate Exchange®, Inc.© 2010 Chicago Climate Exchange Pacala-Socolow GHG

  5. Greenhouse Gas Abatement with Distributed Generation in California's Commercial Buildings

    E-Print Network [OSTI]

    Stadler, Michael

    2010-01-01T23:59:59.000Z

    holidays ICE: Internal combustion engine, GT: Gas turbine,indicate that internal combustion engines (ICE) with heatdominance of internal combustion engines with heat exchanger

  6. Leaf-to-leaf distances and their moments in finite and infinite m-ary tree graphs

    E-Print Network [OSTI]

    Andrew M. Goldsborough; S. Alex Rautu; Rudolf A. Römer

    2015-04-17T23:59:59.000Z

    We study the leaf-to-leaf distances on full and complete m-ary graphs using a recursive approach. In our formulation, leaves are ordered along a line. We find explicit analytical formulae for the sum of all paths for arbitrary leaf-to-leaf distance r as well as the average path lengths and the moments thereof. We show that the resulting explicit expressions can be recast in terms of Hurwitz-Lerch transcendants. Results for periodic trees are also given. For incomplete random binary trees, we provide first results by numerical techniques; we find a rapid drop of leaf-to-leaf distances for large r.

  7. affects leaf surface: Topics by E-print Network

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

    Derived Leaf Area Index over the High-Latitude Northern Hemisphere. Part II: Earth System Models CiteSeer Summary: Abstract: Leaf Area Index (LAI) is a key parameter in the...

  8. arietinum leaf surfaces: Topics by E-print Network

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

    Derived Leaf Area Index over the High-Latitude Northern Hemisphere. Part II: Earth System Models CiteSeer Summary: Abstract: Leaf Area Index (LAI) is a key parameter in the...

  9. Breakthrough Technologies Leaf Extraction and Analysis Framework Graphical User

    E-Print Network [OSTI]

    Weitz, Joshua S.

    : Segmenting and Analyzing the Structure of Leaf Veins and Areoles1[W][OA] Charles A. Price*, Olga Symonova and Analysis Framework Graphical User Interface (LEAF GUI), a user-assisted software tool that facilitates software promises to facilitate improved understanding of the adaptive and ecological significance of leaf

  10. Red Leaf Resources and the Commercialization of Oil Shale

    E-Print Network [OSTI]

    Utah, University of

    Red Leaf Resources and the Commercialization of Oil Shale #12;About Red Leaf Resources 2006 Company commercial development field activities #12;Highlights Proven, Revolutionary Oil Shale Extraction Process Technology Significant Owned Oil Shale Resource #12;· The executive management team of Red Leaf Resources

  11. Optimization of Heat Exchangers

    SciTech Connect (OSTI)

    Ivan Catton

    2010-10-01T23:59:59.000Z

    The objective of this research is to develop tools to design and optimize heat exchangers (HE) and compact heat exchangers (CHE) for intermediate loop heat transport systems found in the very high temperature reator (VHTR) and other Generation IV designs by addressing heat transfer surface augmentation and conjugate modeling. To optimize heat exchanger, a fast running model must be created that will allow for multiple designs to be compared quickly. To model a heat exchanger, volume averaging theory, VAT, is used. VAT allows for the conservation of mass, momentum and energy to be solved for point by point in a 3 dimensional computer model of a heat exchanger. The end product of this project is a computer code that can predict an optimal configuration for a heat exchanger given only a few constraints (input fluids, size, cost, etc.). As VAT computer code can be used to model characteristics )pumping power, temperatures, and cost) of heat exchangers more quickly than traditional CFD or experiment, optimization of every geometric parameter simultaneously can be made. Using design of experiment, DOE and genetric algorithms, GE, to optimize the results of the computer code will improve heat exchanger disign.

  12. Community Partners A New Leaf Program

    E-Print Network [OSTI]

    Huang, Jianyu

    Community Partners A New Leaf Program A+ Nursery A+ Preschool ABCD Early Head Start Addiction Treatment Center of New England African Apostolate of Manchester Diocese AIDS Action Committee Allston at Home Program Home for Little Wanderers - Therapeutic Foster Care Program Horace Mann School

  13. Growth of oxide exchange bias layers

    DOE Patents [OSTI]

    Chaiken, A.; Michel, R.P.

    1998-07-21T23:59:59.000Z

    An oxide (NiO, CoO, NiCoO) antiferromagnetic exchange bias layer produced by ion beam sputtering of an oxide target in pure argon (Ar) sputtering gas, with no oxygen gas introduced into the system. Antiferromagnetic oxide layers are used, for example, in magnetoresistive readback heads to shift the hysteresis loops of ferromagnetic films away from the zero field axis. For example, NiO exchange bias layers have been fabricated using ion beam sputtering of an NiO target using Ar ions, with the substrate temperature at 200 C, the ion beam voltage at 1000V and the beam current at 20 mA, with a deposition rate of about 0.2 {angstrom}/sec. The resulting NiO film was amorphous. 4 figs.

  14. Anion exchange membrane

    DOE Patents [OSTI]

    Verkade, John G; Wadhwa, Kuldeep; Kong, Xueqian; Schmidt-Rohr, Klaus

    2013-05-07T23:59:59.000Z

    An anion exchange membrane and fuel cell incorporating the anion exchange membrane are detailed in which proazaphosphatrane and azaphosphatrane cations are covalently bonded to a sulfonated fluoropolymer support along with anionic counterions. A positive charge is dispersed in the aforementioned cations which are buried in the support to reduce the cation-anion interactions and increase the mobility of hydroxide ions, for example, across the membrane. The anion exchange membrane has the ability to operate at high temperatures and in highly alkaline environments with high conductivity and low resistance.

  15. Use of NAP gene to manipulate leaf senescence in plants

    DOE Patents [OSTI]

    Gan, Susheng; Guo, Yongfeng

    2013-04-16T23:59:59.000Z

    The present invention discloses transgenic plants having an altered level of NAP protein compared to that of a non-transgenic plant, where the transgenic plants display an altered leaf senescence phenotype relative to a non-transgenic plant, as well as mutant plants comprising an inactivated NAP gene, where mutant plants display a delayed leaf senescence phenotype compared to that of a non-mutant plant. The present invention also discloses methods for delaying leaf senescence in a plant, as well as methods of making a mutant plant having a decreased level of NAP protein compared to that of a non-mutant plant, where the mutant plant displays a delayed leaf senescence phenotype relative to a non-mutant plant. Methods for causing precocious leaf senescence or promoting leaf senescence in a plant are also disclosed. Also disclosed are methods of identifying a candidate plant suitable for breeding that displays a delayed leaf senescence and/or enhanced yield phenotype.

  16. Active microchannel heat exchanger

    DOE Patents [OSTI]

    Tonkovich, Anna Lee Y. (Pasco, WA) [Pasco, WA; Roberts, Gary L. (West Richland, WA) [West Richland, WA; Call, Charles J. (Pasco, WA) [Pasco, WA; Wegeng, Robert S. (Richland, WA) [Richland, WA; Wang, Yong (Richland, WA) [Richland, WA

    2001-01-01T23:59:59.000Z

    The present invention is an active microchannel heat exchanger with an active heat source and with microchannel architecture. The microchannel heat exchanger has (a) an exothermic reaction chamber; (b) an exhaust chamber; and (c) a heat exchanger chamber in thermal contact with the exhaust chamber, wherein (d) heat from the exothermic reaction chamber is convected by an exothermic reaction exhaust through the exhaust chamber and by conduction through a containment wall to the working fluid in the heat exchanger chamber thereby raising a temperature of the working fluid. The invention is particularly useful as a liquid fuel vaporizer and/or a steam generator for fuel cell power systems, and as a heat source for sustaining endothermic chemical reactions and initiating exothermic reactions.

  17. Energy Exchange Schedule

    Broader source: Energy.gov [DOE]

    The schedule for Energy Exchange is now available. Attendees will have the option of attending a variety of training sessions offered within 10 tracks during the times listed below. Session details...

  18. Radial flow heat exchanger

    DOE Patents [OSTI]

    Valenzuela, Javier (Hanover, NH)

    2001-01-01T23:59:59.000Z

    A radial flow heat exchanger (20) having a plurality of first passages (24) for transporting a first fluid (25) and a plurality of second passages (26) for transporting a second fluid (27). The first and second passages are arranged in stacked, alternating relationship, are separated from one another by relatively thin plates (30) and (32), and surround a central axis (22). The thickness of the first and second passages are selected so that the first and second fluids, respectively, are transported with laminar flow through the passages. To enhance thermal energy transfer between first and second passages, the latter are arranged so each first passage is in thermal communication with an associated second passage along substantially its entire length, and vice versa with respect to the second passages. The heat exchangers may be stacked to achieve a modular heat exchange assembly (300). Certain heat exchangers in the assembly may be designed slightly differently than other heat exchangers to address changes in fluid properties during transport through the heat exchanger, so as to enhance overall thermal effectiveness of the assembly.

  19. Measurements of gas sorption from seawater and the influence of gas release on open-cycle ocean thermal energy conversion (OC-OTEC) system performance

    SciTech Connect (OSTI)

    Penney, T.R.; Althof, J.A.

    1985-06-01T23:59:59.000Z

    The technical community has questioned the validity and cost-effectiveness of open-cycle ocean thermal energy conversion (OC-OTEC) systems because of the unknown effect of noncondensable gas on heat exchanger performance and the power needed to run vacuum equipment to remove this gas. To date, studies of seawater gas desorption have not been prototypical for system level analysis. This study gives preliminary gas desorption data on a vertical spout, direct contact evaporator and multiple condenser geometries. Results indicate that dissolved gas can be substantially removed before the seawater enters the heat exchange process, reducing the uncertainty and effect of inert gas on heat exchanger performance.

  20. Ion exchange phenomena

    SciTech Connect (OSTI)

    Bourg, I.C.; Sposito, G.

    2011-05-01T23:59:59.000Z

    Ion exchange phenomena involve the population of readily exchangeable ions, the subset of adsorbed solutes that balance the intrinsic surface charge and can be readily replaced by major background electrolyte ions (Sposito, 2008). These phenomena have occupied a central place in soil chemistry research since Way (1850) first showed that potassium uptake by soils resulted in the release of an equal quantity of moles of charge of calcium and magnesium. Ion exchange phenomena are now routinely modeled in studies of soil formation (White et al., 2005), soil reclamation (Kopittke et al., 2006), soil fertilitization (Agbenin and Yakubu, 2006), colloidal dispersion/flocculation (Charlet and Tournassat, 2005), the mechanics of argillaceous media (Gajo and Loret, 2007), aquitard pore water chemistry (Tournassat et al., 2008), and groundwater (Timms and Hendry, 2007; McNab et al., 2009) and contaminant hydrology (Chatterjee et al., 2008; van Oploo et al., 2008; Serrano et al., 2009).

  1. Laser Assisted Emittance Exchange

    SciTech Connect (OSTI)

    Xiang, Dao; /SLAC

    2012-06-11T23:59:59.000Z

    We describe here the laser assisted emittance exchange (LAEE) technique. A laser operating in the transverse mode (TEM10 or TEM01) is used to interact with the electron beam in a dispersive region and to initiate the transverse-to-longitudinal emittance exchange. It is shown that with the LAEE one can generate an electron beam with ultralow transverse emittance, which allows one to significantly bring down the size of an X-ray free electron laser (FEL) and greatly extend the availability of these light sources. The technique can also be used to enhance the performances of X-ray FELs in storage rings. The timing and energy jitter problems for the standard emittance exchange and LAEE techniques are also discussed.

  2. arabidopsis delays leaf: Topics by E-print Network

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

    mediated by delayed responses Katul, Gabriel 4 Chloroplast protein degradation during natural leaf senescence in Arabidopsis thaliana. Open Access Theses and Dissertations...

  3. Separation of the isotopes of boron by chemical exchange reactions

    DOE Patents [OSTI]

    McCandless, F.P.; Herbst, R.S.

    1995-05-30T23:59:59.000Z

    The isotopes of boron, {sup 10}B and {sup 11}B, are separated by means of a gas-liquid chemical exchange reaction involving the isotopic equilibrium between gaseous BF{sub 3} and a liquid BF{sub 3} donor molecular addition complex formed between BF{sub 3} gas and a donor chosen from the group consisting of: nitromethane, acetone, methyl isobutyl ketone, or diisobutyl ketone. 1 Fig.

  4. Leaf traits and foliar CO2 exchange in a Peruvian tropical montane cloud forest 

    E-Print Network [OSTI]

    Van de Weg, Marjan

    2011-06-28T23:59:59.000Z

    Tropical montane cloud forests (TMCF) are one of the most fascinating, but least understood ecosystems in the world, and the interest in the carbon (C) cycle of TMCFs with regard to carbon sequestration and storage ...

  5. Journal of Insect Physiology 52 (2006) 194201 Leaf miner-induced changes in leaf transmittance cause

    E-Print Network [OSTI]

    Giron, David - Institut de Recherche sur la Biologie de l'Insecte, Université François Rabelais

    2006-01-01T23:59:59.000Z

    within plant tissues. The amount of CO2 released by larvae below feeding windows at high radiation levels an herbivore feeds on host plant. Modifications of leaf transmittance properties induced by feeding activity on the herbivore's body temperature and respiration rate have been determined under controlled conditions

  6. Observations on resistance to sorghum leaf blight

    E-Print Network [OSTI]

    Tuleen, Darlene Mae

    1975-01-01T23:59:59.000Z

    and 9, pp. 43-44) reflect genetic segrega- tion, they should be viewed as individual plant phenomena rather than as an intermediate-type susceptibility to toxin. Further genetic study of the host may clarify the role of this toxin in the intermediate..., they are uniformly susceptible to attack by parasites. Hybrid grain sorghums are built on a dangerously narrow genetic base (16) susceptible to leaf blight, Resistant cultivars have, however, been recently discovered (2, 11). The purpose of this thesis is (a...

  7. Leaf Clean Energy Company | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano,Lakefront Tow TankOpen Energy Information PageLeaf

  8. New Leaf Biofuel | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer PlantMunhall, Pennsylvania: EnergyEnergyPPCR)NevisInformation 4thInformationNew Leaf

  9. Munich, Germany Exchange Program

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Munich, Germany Exchange Program Ludwig-Maximilians-Universitat Founded in 1472, Ludwig talented scholars and students from all over the world. As one of Germany's most dynamic universities, LMU administration, and geosciences to name a few. Most courses are offered in Germany, but many departments offer

  10. A feasibility study of internal evaporative cooling for proton exchange membrane fuel cells

    E-Print Network [OSTI]

    Snyder, Loren E

    2006-04-12T23:59:59.000Z

    An investigation was conducted to determine the feasibility of using the technique of ultrasonic nebulization of water into the anode gas stream for evaporative cooling of a Proton Exchange Membrane (PEM) fuel cell. The basic concept of this form...

  11. A feasibility study of internal evaporative cooling for proton exchange membrane fuel cells 

    E-Print Network [OSTI]

    Snyder, Loren E

    2006-04-12T23:59:59.000Z

    An investigation was conducted to determine the feasibility of using the technique of ultrasonic nebulization of water into the anode gas stream for evaporative cooling of a Proton Exchange Membrane (PEM) fuel cell. The ...

  12. PATTERNS OF LEAF WETTABILITY ALONG AN EXTREME MOISTURE GRADIENT IN WESTERN PATAGONIA, ARGENTINA

    E-Print Network [OSTI]

    Brewer, Carol

    PATTERNS OF LEAF WETTABILITY ALONG AN EXTREME MOISTURE GRADIENT IN WESTERN PATAGONIA, ARGENTINA Patagonia, Argentina. Morphological and structural characteristics of leaves significantly affected leaf surfaces. Keywords: leaf wetness, morphology, water droplet, Patagonia, gradient. Introduction A large

  13. Ceramic heat-exchanger applications study

    SciTech Connect (OSTI)

    McFarlin, D.J.; Sgamboti, C.T.; Lessard, R.D.

    1982-10-01T23:59:59.000Z

    To put the potential benefits of ceramic heat exchangers (CHX) applications into quantitative perspective, several industrial cogeneration and electric utiity power generation systems were surveyed and evaluated. This study was focused on coal-based fuel fired applications, for which system performance and economic assessments were made. Seven CHX applications in the industrial cogeneration sector were selected for evaluation. These include (1) Gasified Coal-Fired Gas Turbine, (2) Pressurized Fluidized Bed Combustor (PFBC)-Gas Turbine, (3) Atmospheric Fluidized Bed Combustor (AFBC)-Gas Turbine, (4 and 5) AFBC Combined Cycle with and without reheat and (6 and 7) Indirect Coal-Fired Gas Turbine and Combined Cycle. The performance and economics of these cogeneration systems were evaluated and compared with other competing systems (both advanced and State-of-the-Art). For the electric utility power generation sector five applications utilizing a CHX were selected and evaluated; their performance and cost factors were compared to those of a reference pulverized coal-fired steam plant with flue gas desulfurization. These five applications included (1) PFBC-Combined Cycle, (2) AFBC-Combined Cycle, (3) Industrial Coal Gasifier-Combined Cycle, (4) Indirect Coal-Fired Combined Cycle, and (5) Indirect Coal-Fired Simple Cycle. Of the five CHX applications evaluated in the power generation sector, only the AFBC system showed a clear gain over the reference pulverized coal system.

  14. Viscous exchange flows Gary P. Matson and Andrew J. Hogg

    E-Print Network [OSTI]

    Hogg, Andrew

    -based expressions for the gas mass flow rate and pressure profile in a microscale tube Phys. Fluids 24, 012005 (2012 viscosities, counter-flow within a horizontal channel, are found in many industrial and environmental settingsViscous exchange flows Gary P. Matson and Andrew J. Hogg Citation: Phys. Fluids 24, 023102 (2012

  15. Condensing Heat Exchanger for Optimization of Energy Efficiency 

    E-Print Network [OSTI]

    Carrigan, J. F.; Johnson, D. W.; DiVitto, J. G.; Schulze, K. H.

    1995-01-01T23:59:59.000Z

    Historically, boiler efficiency has been limited due to the minimum temperature allowed at the stack. Heat lost up the stack was in exchange for keeping the flue gas temperature above the water vapor dew point. If water vapor was allowed to condense...

  16. Energy Exchange: Federal Sustainability for the Next Decade

    Broader source: Energy.gov [DOE]

    The 2015 Energy Exchange in Phoenix, Arizona, is being launched to provide two-and-a-half days of structured training to employees from federal agencies, both civilian and military, who are working to improve facility performance, advance the use of renewable energy, and reduce greenhouse gas emissions.

  17. Polarization limits in K-Rb spin-exchange mixtures

    SciTech Connect (OSTI)

    Lancor, B.; Walker, T. G. [Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

    2011-06-15T23:59:59.000Z

    We present measurements of the optical absorption of K vapor at 795 nm due to the presence of high-pressure He gas. The results set a limit on the polarization attainable in hybrid spin-exchange optical pumping of {sup 3}He.

  18. Condensing Heat Exchanger for Optimization of Energy Efficiency

    E-Print Network [OSTI]

    Carrigan, J. F.; Johnson, D. W.; DiVitto, J. G.; Schulze, K. H.

    Historically, boiler efficiency has been limited due to the minimum temperature allowed at the stack. Heat lost up the stack was in exchange for keeping the flue gas temperature above the water vapor dew point. If water vapor was allowed to condense...

  19. On-line optimization of a crude unit heat exchanger Statoil Mongstad

    E-Print Network [OSTI]

    Skogestad, Sigurd

    On-line optimization of a crude unit heat exchanger network Tore Lid #3; Statoil Mongstad N-5954 modeling and on-line optimization of a crude unit heat exchanger network at the Statoil Mongstad re#12;nery. The objective is to minimize the energy input in the gas #12;red heater by optimally distributing the cold crude

  20. Building Energy Data Exchange Specification Scoping Report |...

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

    Building Energy Data Exchange Specification Scoping Report Building Energy Data Exchange Specification Scoping Report The Building Energy Data Exchange Specification (BEDES),...

  1. Ecosystem Restoration through Interdisciplinary Exchange

    E-Print Network [OSTI]

    Sachs, Frederick

    Ecosystem Restoration through Interdisciplinary Exchange David M. Blersch dblersch Shade of Blue and You 21 September 2010 #12;National Science Foundation Ecosystem Restoration through;National Science Foundation Ecosystem Restoration through Interdisciplinary Exchange UB's ERIE Program www

  2. The fungus gardens of leaf-cutter ants undergo a distinct physiologica...

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

    fungus gardens of leaf-cutter ants undergo a distinct physiological transition during biomass degradation. The fungus gardens of leaf-cutter ants undergo a distinct physiological...

  3. Xenon Recirculation-Purification with a Heat Exchanger

    E-Print Network [OSTI]

    K. L. Giboni; E. Aprile; B. Choi; T. Haruyama; R. F. Lang; K. E. Lim; A. J. Melgarejo; G. Plante

    2011-03-04T23:59:59.000Z

    Liquid-xenon based particle detectors have been dramatically growing in size during the last years, and are now exceeding the one-ton scale. The required high xenon purity is usually achieved by continuous recirculation of xenon gas through a high-temperature getter. This challenges the traditional way of cooling these large detectors, since in a thermally well insulated detector, most of the cooling power is spent to compensate losses from recirculation. The phase change during recondensing requires five times more cooling power than cooling the gas from ambient temperature to -100C (173 K). Thus, to reduce the cooling power requirements for large detectors, we propose to use the heat from the purified incoming gas to evaporate the outgoing xenon gas, by means of a heat exchanger. Generally, a heat exchanger would appear to be only of very limited use, since evaporation and liquefaction occur at zero temperature difference. However, the use of a recirculation pump reduces the pressure of the extracted liquid, forces it to evaporate, and thus cools it down. We show that this temperature difference can be used for an efficient heat exchange process. We investigate the use of a commercial parallel plate heat exchanger with a small liquid xenon detector. Although we expected to be limited by the available cooling power to flow rates of about 2 SLPM, rates in excess of 12 SLPM can easily be sustained, limited only by the pump speed and the impedance of the flow loop. The heat exchanger operates with an efficiency of (96.8 +/- 0.5)%. This opens the possibility for fast xenon gas recirculation in large-scale experiments, while minimizing thermal losses.

  4. Co-flow anode/cathode supply heat exchanger for a solid-oxide fuel cell assembly

    DOE Patents [OSTI]

    Haltiner, Jr., Karl J.; Kelly, Sean M.

    2005-11-22T23:59:59.000Z

    In a solid-oxide fuel cell assembly, a co-flow heat exchanger is provided in the flow paths of the reformate gas and the cathode air ahead of the fuel cell stack, the reformate gas being on one side of the exchanger and the cathode air being on the other. The reformate gas is at a substantially higher temperature than is desired in the stack, and the cathode gas is substantially cooler than desired. In the co-flow heat exchanger, the temperatures of the reformate and cathode streams converge to nearly the same temperature at the outlet of the exchanger. Preferably, the heat exchanger is formed within an integrated component manifold (ICM) for a solid-oxide fuel cell assembly.

  5. Thermoelectric heat exchange element

    DOE Patents [OSTI]

    Callas, James J. (Peoria, IL); Taher, Mahmoud A. (Peoria, IL)

    2007-08-14T23:59:59.000Z

    A thermoelectric heat exchange module includes a first substrate including a heat receptive side and a heat donative side and a series of undulatory pleats. The module may also include a thermoelectric material layer having a ZT value of 1.0 or more disposed on at least one of the heat receptive side and the heat donative side, and an electrical contact may be in electrical communication with the thermoelectric material layer.

  6. Proceedings: Heat exchanger workshop

    SciTech Connect (OSTI)

    Not Available

    1987-07-01T23:59:59.000Z

    Heat transfer processes are of controlling importance in the operation of a thermal power plant. Heat exchangers are major cost items and are an important source of problems causing poor power plant availability and performance. A workshop to examine the improvements that can be made to heat exchangers was sponsored by the Electric Power Research Institute (EPRI) on June 10-11, 1986, in Palo Alto, California. This workshop was attended by 25 engineers and scientists representing EPRI-member utilities and EPRI consultants. A forum was provided for discussions related to the design, operation and maintenance of utility heat transfer equipment. The specific objectives were to identify research directions that could significantly improve heat exchanger performance, reliability and life cycle economics. Since there is a great diversity of utility heat transfer equipment in use, this workshop addressed two equipment categories: Boiler Feedwater Heaters (FWH) and Heat Recovery Steam Generators (HRSG). The workshop was divided into the following panel sessions: functional design, mechanical design, operation, suggested research topics, and prioritization. Each panel session began with short presentations by experts on the subject and followed by discussions by the attendees. This report documents the proceedings of the workshop and contains recommendations of potentially valuable areas of research and development. 4 figs.

  7. Priority Firm Exchange .

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeedingTechnical News, informationPriority Firm Exchange . . . . . . . . .

  8. High precision measurements of atmospheric concentrations and plant exchange rates of carbonyl

    E-Print Network [OSTI]

    Yakir, Dan

    High precision measurements of atmospheric concentrations and plant exchange rates of carbonyl K I R * *Environmental Sciences and Energy Research, The Weizmann Institute of Science, Rehovot. The results were consistent with those of nononline gas chromatography­mass spectrometry for COS and IR gas

  9. Anion-exchange resin-based desulfurization process

    SciTech Connect (OSTI)

    Sheth, A.C.; Strevel, S.D.; Dharmapurikar, R.

    1992-01-01T23:59:59.000Z

    Under DOE Grant No. FG22-90PC90309, the University of Tennessee Space Institute (UTSI) is contracted to further develop its anion-exchange, resin-based desulfurization concept to desulfurize alkali metal sulfates. From environmental as well as economic viewpoints, it is necessary to remove soluble sulfates from the wastes created by flue gas desulfurization systems. In order to do this economically, a low-cost desulfurization process for spent sorbents is necessary. UTSI's anion-exchange resin-based desulfurization concept is believed to satisfy these requirements.

  10. Ion exchange technology assessment report

    SciTech Connect (OSTI)

    Duhn, E.F.

    1992-01-01T23:59:59.000Z

    In the execution of its charter, the SRS Ion Exchange Technology Assessment Team has determined that ion exchange (IX) technology has evolved to the point where it should now be considered as a viable alternative to the SRS reference ITP/LW/PH process. The ion exchange media available today offer the ability to design ion exchange processing systems tailored to the unique physical and chemical properties of SRS soluble HLW's. The technical assessment of IX technology and its applicability to the processing of SRS soluble HLW has demonstrated that IX is unquestionably a viable technology. A task team was chartered to evaluate the technology of ion exchange and its potential for replacing the present In-Tank Precipitation and proposed Late Wash processes to remove Cs, Sr, and Pu from soluble salt solutions at the Savannah River Site. This report documents the ion exchange technology assessment and conclusions of the task team.

  11. Ion exchange technology assessment report

    SciTech Connect (OSTI)

    Duhn, E.F.

    1992-12-31T23:59:59.000Z

    In the execution of its charter, the SRS Ion Exchange Technology Assessment Team has determined that ion exchange (IX) technology has evolved to the point where it should now be considered as a viable alternative to the SRS reference ITP/LW/PH process. The ion exchange media available today offer the ability to design ion exchange processing systems tailored to the unique physical and chemical properties of SRS soluble HLW`s. The technical assessment of IX technology and its applicability to the processing of SRS soluble HLW has demonstrated that IX is unquestionably a viable technology. A task team was chartered to evaluate the technology of ion exchange and its potential for replacing the present In-Tank Precipitation and proposed Late Wash processes to remove Cs, Sr, and Pu from soluble salt solutions at the Savannah River Site. This report documents the ion exchange technology assessment and conclusions of the task team.

  12. Economics of gobar gas

    SciTech Connect (OSTI)

    Pang, A.; Shrestha, P.C.; Fulford, D.

    1980-01-01T23:59:59.000Z

    This series of reports follows a sequence necessary to start and run a biogas project. The first provides and introduction to biogas, its costs, and its yields. Its use will conserve forests, create clean, healthy fuel and fertilizer, and save Nepal foreign exchange. The feasibility study considered water and dung supply, degree of cooperation among the affected villagers, the need for the plant, and intangibles such as erosion control. The initial survey investigates the community social situation, needs, and cooperation. The Gobar Gas company had had personnel problems which decreased service, but the problems were being worked out. The project has been highly successful. The 11 Chinese plants worked well with no leaks from the cement but the gas valves leaked. The scum breaker also caused problems. The high quality plaster work required is the greatest hindrance.

  13. Oak Leaf Roller and Springtime Defoliation of Live Oak Trees

    E-Print Network [OSTI]

    Drees, Bastiaan M.

    2004-03-26T23:59:59.000Z

    This publication explains how to minimize damage to live oak trees by the oak leaf roller and an associated caterpillar species, which occur throughout Texas but are most damaging in the Hill Country and South Texas....

  14. andongensis leaf juice: Topics by E-print Network

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

    of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  15. arborescens leaf juice: Topics by E-print Network

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

    of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  16. activated spinach leaf: Topics by E-print Network

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

    varieties of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  17. aloe arborescens leaf: Topics by E-print Network

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

    varieties of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  18. aloe andongensis leaf: Topics by E-print Network

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

    varieties of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  19. aloe ferox leaf: Topics by E-print Network

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

    varieties of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  20. aloe barbadensis leaf: Topics by E-print Network

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

    varieties of elm trees. Learn how to identify this insect and understand its biology and life cycle. There are suggestions for controlling elm leaf beetles, as well as a table of...

  1. Study of Gas Flow Dynamics in Porous and Granular Media with Laser-Polarized 129

    E-Print Network [OSTI]

    Walsworth, Ronald L.

    Abstract This thesis presents Nuclear Magnetic Resonance (NMR) studies of gas flow dynamics in porous in porous rock cores and the mass exchanges between different phases in fluidized granular systems, were-emulsion exchange and emulsion-adsorption exchange in a fluidized bed are two processes crucial to the efficiency

  2. Biochemical and photochemical control of leaf disk expansion

    E-Print Network [OSTI]

    Scott, Ralph A.

    1957-01-01T23:59:59.000Z

    promotive effect with kin ins .............. ................ k9 f. Relation of kinetin added to its analogs... .. 51 (1) Effect of kinin-KEN combinations on the relative amount of leaf expansion with red light versus darkness....... .. 53 (2) Effect...-naphthalene acetic acid,..... ,,??? 87 (4) Effect of X-irradiation on leaf disk expansion with kin ins, IAA, and low intensity light.................... 9^ b. Response of X-irradiated intact plants to kinins, IAA, and low intensity light... ?????? 101 LIST...

  3. International Conference on Gas Hydrates May 19-23, 2002, Yokohama

    E-Print Network [OSTI]

    Gudmundsson, Jon Steinar

    4th International Conference on Gas Hydrates May 19-23, 2002, Yokohama Cold Flow Hydrate Technology an opportunity for flow assurance in deepwater production of oil and gas. Hydrate R&D in the Natural Gas Hydrate exchange and reactor units. Introduction Hydrates form when liquid water and natural gas are in contact

  4. A Binghamton Exchange Program UNIVERSITY COLLEGE UTRECHT EXCHANGE PROGRAM

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    A Binghamton Exchange Program UNIVERSITY COLLEGE UTRECHT EXCHANGE PROGRAM THE BINGHAMTON PROGRAM AT UNIVERSITY COLLEGE UTRECHT Utrecht University ranks first among Dutch universi- ties and is one of the finest universities in Europe. Students take courses in the University College Utrecht (UCU), Utrecht University

  5. A Binghamton Exchange Program UTRECHT SCHOOL OF ECONOMICS EXCHANGE PROGRAM

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    A Binghamton Exchange Program UTRECHT SCHOOL OF ECONOMICS EXCHANGE PROGRAM THE BINGHAMTON PROGRAM AT UTRECHT SCHOOL OF ECONOMICS Utrecht University ranks first among Dutch universi- ties and is one of the finest universities in Europe. Students take courses in the Utrecht School of Eco- nomics (USE

  6. Instructions for Apple Leaf Sample Collection.doc September 2013 Instructions for Apple Leaf Sample Collection Vermont

    E-Print Network [OSTI]

    Hayden, Nancy J.

    . MAKE OUT a check or money order payable to UVM, and enclose check, information sheets, and leaf sample, available at most drugstores, for washing and rinsing the samples. Change the water as it becomes dirty

  7. Regeneration Heat Exchange

    SciTech Connect (OSTI)

    J. Lin

    2003-07-30T23:59:59.000Z

    The original project goals were to establish the viability of the proposed gas turbine regenerator concept by performing the following tasks: (1) Perform detailed design of a working model of the regenerator concept. (2) Construct a ''bench-top'' model of the regenerator concept based upon the detail design. (3) Test the bench-top model and gather data to support the concept's viability. The project funding was used to acquire the tools and material to perform the aforementioned tasks.

  8. High ratio recirculating gas compressor

    DOE Patents [OSTI]

    Weinbrecht, J.F.

    1989-08-22T23:59:59.000Z

    A high ratio positive displacement recirculating rotary compressor is disclosed. The compressor includes an integral heat exchanger and recirculation conduits for returning cooled, high pressure discharge gas to the compressor housing to reducing heating of the compressor and enable higher pressure ratios to be sustained. The compressor features a recirculation system which results in continuous and uninterrupted flow of recirculation gas to the compressor with no direct leakage to either the discharge port or the intake port of the compressor, resulting in a capability of higher sustained pressure ratios without overheating of the compressor. 10 figs.

  9. Technology Performance Exchange (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-10-01T23:59:59.000Z

    This fact sheet, 'The Technology Performance Exchange' will be presented at the ET Summit, held at the Pasadena Convention Center on October 15-17, 2012. The Technology Performance Exchange will be a centralized, Web-based portal for finding and sharing energy performance data for commercial building technologies.

  10. 4, 125164, 2007 Methanol exchange

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    BGD 4, 125­164, 2007 Methanol exchange between grassland and the atmosphere A. Brunner et al. Title Discussions Biogeosciences Discussions is the access reviewed discussion forum of Biogeosciences Methanol (albrecht.neftel@art.admin.ch) 125 #12;BGD 4, 125­164, 2007 Methanol exchange between grassland

  11. Effect of direct liquid water injection and interdigitated flow field on the performance of proton exchange membrane fuel cells

    E-Print Network [OSTI]

    Wood, D. L.; Yi, Y. S.; Van Nguyen, Trung

    1998-01-01T23:59:59.000Z

    Proper water management is vital to ensuring successful performance of proton exchange membrane fuel cells. The effectiveness of the direct liquid water injection scheme and the interdigitated flow field design towards providing adequate gas...

  12. High-resolution studies of charge exchange in supernova remnants with Magellan, XMM-Newton, and Micro-X

    E-Print Network [OSTI]

    Heine, Sarah Nicole Trowbridge

    2014-01-01T23:59:59.000Z

    Charge exchange, the semi-resonant transfer of an electron from a neutral atom to an excited state in an energetic ion, can occur in plasmas where energetic ions are incident on a cold, at least partially neutral gas. ...

  13. Fuel cell gas management system

    DOE Patents [OSTI]

    DuBose, Ronald Arthur (Marietta, GA)

    2000-01-11T23:59:59.000Z

    A fuel cell gas management system including a cathode humidification system for transferring latent and sensible heat from an exhaust stream to the cathode inlet stream of the fuel cell; an anode humidity retention system for maintaining the total enthalpy of the anode stream exiting the fuel cell equal to the total enthalpy of the anode inlet stream; and a cooling water management system having segregated deionized water and cooling water loops interconnected by means of a brazed plate heat exchanger.

  14. Assessment of next generation nuclear plant intermediate heat exchanger design.

    SciTech Connect (OSTI)

    Majumdar, S.; Moisseytsev, A.; Natesan, K.; Nuclear Engineering Division

    2008-10-17T23:59:59.000Z

    The Next Generation Nuclear Plant (NGNP), which is an advanced high temperature gas reactor (HTGR) concept with emphasis on production of both electricity and hydrogen, involves helium as the coolant and a closed-cycle gas turbine for power generation with a core outlet/gas turbine inlet temperature of 900-1000 C. In the indirect cycle system, an intermediate heat exchanger is used to transfer the heat from primary helium from the core to the secondary fluid, which can be helium, nitrogen/helium mixture, or a molten salt. The system concept for the vary high temperature reactor (VHTR) can be a reactor based on the prismatic block of the GT-MHR developed by a consortium led by General Atomics in the U.S. or based on the PBMR design developed by ESKOM of South Africa and British Nuclear Fuels of U.K. This report has made an assessment on the issues pertaining to the intermediate heat exchanger (IHX) for the NGNP. A detailed thermal hydraulic analysis, using models developed at ANL, was performed to calculate heat transfer, temperature distribution, and pressure drop. Two IHX designs namely, shell and straight tube and compact heat exchangers were considered in an earlier assessment. Helical coil heat exchangers were analyzed in the current report and the results were compared with the performance features of designs from industry. In addition, a comparative analysis is presented between the shell and straight tube, helical, and printed circuit heat exchangers from the standpoint of heat exchanger volume, primary and secondary sides pressure drop, and number of tubes. The IHX being a high temperature component, probably needs to be designed using ASME Code Section III, Subsection NH, assuming that the IHX will be classified as a class 1 component. With input from thermal hydraulic calculations performed at ANL, thermal conduction and stress analyses were performed for the helical heat exchanger design and the results were compared with earlier-developed results on shell and straight tube and printed circuit heat exchangers.

  15. High Temperature Heat Exchanger Project

    SciTech Connect (OSTI)

    Anthony E. Hechanova, Ph.D.

    2008-09-30T23:59:59.000Z

    The UNLV Research Foundation assembled a research consortium for high temperature heat exchanger design and materials compatibility and performance comprised of university and private industry partners under the auspices of the US DOE-NE Nuclear Hydrogen Initiative in October 2003. The objectives of the consortium were to conduct investigations of candidate materials for high temperature heat exchanger componets in hydrogen production processes and design and perform prototypical testing of heat exchangers. The initial research of the consortium focused on the intermediate heat exchanger (located between the nuclear reactor and hydrogen production plan) and the components for the hydrogen iodine decomposition process and sulfuric acid decomposition process. These heat exchanger components were deemed the most challenging from a materials performance and compatibility perspective

  16. Experimental Evaluation of a Pt-based Heat Exchanger Methanol Reformer for a HTPEM Fuel Cell Stack

    E-Print Network [OSTI]

    Berning, Torsten

    Experimental Evaluation of a Pt-based Heat Exchanger Methanol Reformer for a HTPEM Fuel Cell Stack as e.g. methanol as the hydrogen carrier and reforming it to a hydrogen rich gas can solve some of these storage issues. The work presented here examines the use of a heat exchanger methanol reformer for use

  17. Fast Neutral Generation by Charge Exchange Reaction and Its Effect on Neutron Production Rate in Inertial Electrostatic Confinement Fusion Systems

    SciTech Connect (OSTI)

    Yoshinaga, S.; Matsuura, H.; Nakao, Y.; Kudo, K. [Kyushu University (Japan)

    2005-05-15T23:59:59.000Z

    Fast neutral generation by charge exchange reaction in inertial electrostatic confinement plasmas is studied by solving the Poisson equation and the Boltzmann equation for fast neutrals. Fusion reactions carried by the charge exchange fast neutrals become appreciable compared with ion-background fusion reaction. It is shown that the fusion reaction between fast neutral and background gas is sensitively affected by experimental parameters (grid voltage, background gas pressure) and ion distribution function.

  18. Energy Recovery By Direct Contact Gas-Liquid Heat Exchange 

    E-Print Network [OSTI]

    Fair, J. R.; Bravo, J. L.

    1988-01-01T23:59:59.000Z

    by Fair (1912a, I972b). An empirical relationship, based on published data as well as on the use of the analogy is: 0.015 CO. 82 L 0.47 hfl= (15) Z 0.38 sp where Zsp is the height of a single zone of spray contac . While data on the liquid phase... liquid s sensible T total LITERATURE CITED Bharathan, D., Parsons, B. K., Althof, J. A., "Direct-Contac Condensers for Open-Cycle OTEC Applications", Solar Energy Research Institute Report SERlfTR-252 3108, Golden, Colorado, May 1988. 268 ESL...

  19. Secondary Heat Exchanger Design and Comparison for Advanced High Temperature Reactor

    SciTech Connect (OSTI)

    Piyush Sabharwall; Ali Siahpush; Michael McKellar; Michael Patterson; Eung Soo Kim

    2012-06-01T23:59:59.000Z

    The goals of next generation nuclear reactors, such as the high temperature gas-cooled reactor and advance high temperature reactor (AHTR), are to increase energy efficiency in the production of electricity and provide high temperature heat for industrial processes. The efficient transfer of energy for industrial applications depends on the ability to incorporate effective heat exchangers between the nuclear heat transport system and the industrial process heat transport system. The need for efficiency, compactness, and safety challenge the boundaries of existing heat exchanger technology, giving rise to the following study. Various studies have been performed in attempts to update the secondary heat exchanger that is downstream of the primary heat exchanger, mostly because its performance is strongly tied to the ability to employ more efficient conversion cycles, such as the Rankine super critical and subcritical cycles. This study considers two different types of heat exchangers—helical coiled heat exchanger and printed circuit heat exchanger—as possible options for the AHTR secondary heat exchangers with the following three different options: (1) A single heat exchanger transfers all the heat (3,400 MW(t)) from the intermediate heat transfer loop to the power conversion system or process plants; (2) Two heat exchangers share heat to transfer total heat of 3,400 MW(t) from the intermediate heat transfer loop to the power conversion system or process plants, each exchanger transfers 1,700 MW(t) with a parallel configuration; and (3) Three heat exchangers share heat to transfer total heat of 3,400 MW(t) from the intermediate heat transfer loop to the power conversion system or process plants. Each heat exchanger transfers 1,130 MW(t) with a parallel configuration. A preliminary cost comparison will be provided for all different cases along with challenges and recommendations.

  20. Charge exchange molecular ion source

    DOE Patents [OSTI]

    Vella, Michael C.

    2003-06-03T23:59:59.000Z

    Ions, particularly molecular ions with multiple dopant nucleons per ion, are produced by charge exchange. An ion source contains a minimum of two regions separated by a physical barrier and utilizes charge exchange to enhance production of a desired ion species. The essential elements are a plasma chamber for production of ions of a first species, a physical separator, and a charge transfer chamber where ions of the first species from the plasma chamber undergo charge exchange or transfer with the reactant atom or molecules to produce ions of a second species. Molecular ions may be produced which are useful for ion implantation.

  1. Heat exchanger using graphite foam

    DOE Patents [OSTI]

    Campagna, Michael Joseph; Callas, James John

    2012-09-25T23:59:59.000Z

    A heat exchanger is disclosed. The heat exchanger may have an inlet configured to receive a first fluid and an outlet configured to discharge the first fluid. The heat exchanger may further have at least one passageway configured to conduct the first fluid from the inlet to the outlet. The at least one passageway may be composed of a graphite foam and a layer of graphite material on the exterior of the graphite foam. The layer of graphite material may form at least a partial barrier between the first fluid and a second fluid external to the at least one passageway.

  2. Heat exchanger with ceramic elements

    DOE Patents [OSTI]

    Corey, John A. (North Troy, NY)

    1986-01-01T23:59:59.000Z

    An annular heat exchanger assembly includes a plurality of low thermal growth ceramic heat exchange members with inlet and exit flow ports on distinct faces. A mounting member locates each ceramic member in a near-annular array and seals the flow ports on the distinct faces into the separate flow paths of the heat exchanger. The mounting member adjusts for the temperature gradient in the assembly and the different coefficients of thermal expansion of the members of the assembly during all operating temperatures.

  3. Understanding microbe-mineral electron exchange | EMSL

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

    insight into how bacteria, such as S. oneidensis (above), exchange electrons with minerals in their surroundings as part of cellular respiration-a series of electron exchanges...

  4. Advanced Materials for Proton Exchange Membranes | Department...

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

    Advanced Materials for Proton Exchange Membranes Advanced Materials for Proton Exchange Membranes A presentation to the High Temperature Membranes Working Group meeting, May 19,...

  5. Competing effects of magnetocrystalline anisotropy and exchange...

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

    effects of magnetocrystalline anisotropy and exchange bias in epitaxial FeIrMn bilayers. Competing effects of magnetocrystalline anisotropy and exchange bias in epitaxial FeIrMn...

  6. Residential Exchange History Fact Sheet - June 2007

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

    history of BPA's Residential Exchange Program June 2007 F rom its start, the Residential Exchange Program (REP) has been a source of nearly continuous controversy. Its roots go...

  7. Heat exchange assembly

    DOE Patents [OSTI]

    Lowenstein, Andrew; Sibilia, Marc; Miller, Jeffrey; Tonon, Thomas S.

    2004-06-08T23:59:59.000Z

    A heat exchange assembly comprises a plurality of plates disposed in a spaced-apart arrangement, each of the plurality of plates includes a plurality of passages extending internally from a first end to a second end for directing flow of a heat transfer fluid in a first plane, a plurality of first end-piece members equaling the number of plates and a plurality of second end-piece members also equaling the number of plates, each of the first and second end-piece members including a recessed region adapted to fluidly connect and couple with the first and second ends of the plate, respectively, and further adapted to be affixed to respective adjacent first and second end-piece members in a stacked formation, and each of the first and second end-piece members further including at least one cavity for enabling entry of the heat transfer fluid into the plate, exit of the heat transfer fluid from the plate, or 180.degree. turning of the fluid within the plate to create a serpentine-like fluid flow path between points of entry and exit of the fluid, and at least two fluid conduits extending through the stacked plurality of first and second end-piece members for providing first fluid connections between the parallel fluid entry points of adjacent plates and a fluid supply inlet, and second fluid connections between the parallel fluid exit points of adjacent plates and a fluid discharge outlet so that the heat transfer fluid travels in parallel paths through each respective plate.

  8. Hear Exchange Assembly

    SciTech Connect (OSTI)

    Lowenstein, Andrew (Princeton, NJ); Sibilia, Marc (Princeton, NJ); Miller, Jeffrey (Rocky Hill, NJ); Tonon, Thomas S. (Princeton, NJ)

    2003-05-27T23:59:59.000Z

    A heat exchange assembly comprises a plurality of plates disposed in a spaced-apart arrangement, each of the plurality of plates includes a plurality of passages extending internally from a first end to a second end for directing flow of a heat transfer fluid in a first plane, a plurality of first end-piece members equaling the number of plates and a plurality of second end-piece members also equaling the number of plates, each of the first and second end-piece members including a recessed region adapted to fluidly connect and couple with the first and second ends of the plate, respectively, and further adapted to be affixed to respective adjacent first and second end-piece members in a stacked formation, and each of the first and second end-piece members further including at least one cavity for enabling entry of the heat transfer fluid into the plate, exit of the heat transfer fluid from the plate, or 180.degree. turning of the fluid within the plate to create a serpentine-like fluid flow path between points of entry and exit of the fluid, and at least two fluid conduits extending through the stacked plurality of first and second end-piece members for providing first fluid connections between the parallel fluid entry points of adjacent plates and a fluid supply inlet, and second fluid connections between the parallel fluid exit points of adjacent plates and a fluid discharge outlet so that the heat transfer fluid travels in parallel paths through each respective plate.

  9. Asset Prices and Exchange Rates

    E-Print Network [OSTI]

    Pavlova, Anna

    2003-08-01T23:59:59.000Z

    This paper develops a simple two-country, two-good model, in which the real exchange rate, stock and bond prices are jointly determined. The model predicts that ...

  10. Asset Prices and Exchange Rates

    E-Print Network [OSTI]

    Pavlova, Anna

    2004-11-30T23:59:59.000Z

    This paper develops a simple two-country, two-good model, in which the real exchange rate, stock and bond prices are jointly determined. The model predicts that stock market prices are correlated ...

  11. Energy Efficiency Exchange 2015 Schedule

    Broader source: Energy.gov [DOE]

    The schedule for Energy Efficiency Exchange 2015 is now available. Attendees will have the option of attending a variety of training sessions offered within 10 tracks during the times listed below....

  12. Optimization of Heat Exchanger Cleaning 

    E-Print Network [OSTI]

    Siegell, J. H.

    1986-01-01T23:59:59.000Z

    The performance of heat integration systems is quantified in terms of the amount of heat that is recovered. This decreases with time due to increased fouling of the heat exchange surface. Using the "Total Fouling Related Expenses (TFRE)" approach...

  13. Designing Flexible Heat Exchanger Networks

    E-Print Network [OSTI]

    Gautam, R.; Chen, H. S.; Wareck, J. S.

    Procedures and methods used for designing flexible heat exchanger networks are described. The general approach consists of defining the flexibility problem as a set of cases. Pinch Technology is then used to develop an initial network design...

  14. Microstructure of Gas Diffusion Layers for PEM Fuel Cells

    E-Print Network [OSTI]

    Endres. William J.

    Microstructure of Gas Diffusion Layers for PEM Fuel Cells N. Parikh1 , J. S. Allen1 , R. S. Yassar1 Introduction A gas diffusion layer (GDL) in a proton exchange mem- brane fuel cell (PEMFC) often is comprised porosimetry (MSP) [5]. The general procedure for obtaining the pore size distribution is to inject a fluid

  15. Vitrification of ion exchange resins

    DOE Patents [OSTI]

    Cicero-Herman, Connie A. (Aiken, SC); Workman, Rhonda Jackson (North Augusta, SC)

    2001-01-01T23:59:59.000Z

    The present invention relates to vitrification of ion exchange resins that have become loaded with hazardous or radioactive wastes, in a way that produces a homogenous and durable waste form and reduces the disposal volume of the resin. The methods of the present invention involve directly adding borosilicate glass formers and an oxidizer to the ion exchange resin and heating the mixture at sufficient temperature to produce homogeneous glass.

  16. Method for controlling exhaust gas heat recovery systems in vehicles

    DOE Patents [OSTI]

    Spohn, Brian L.; Claypole, George M.; Starr, Richard D

    2013-06-11T23:59:59.000Z

    A method of operating a vehicle including an engine, a transmission, an exhaust gas heat recovery (EGHR) heat exchanger, and an oil-to-water heat exchanger providing selective heat-exchange communication between the engine and transmission. The method includes controlling a two-way valve, which is configured to be set to one of an engine position and a transmission position. The engine position allows heat-exchange communication between the EGHR heat exchanger and the engine, but does not allow heat-exchange communication between the EGHR heat exchanger and the oil-to-water heat exchanger. The transmission position allows heat-exchange communication between the EGHR heat exchanger, the oil-to-water heat exchanger, and the engine. The method also includes monitoring an ambient air temperature and comparing the monitored ambient air temperature to a predetermined cold ambient temperature. If the monitored ambient air temperature is greater than the predetermined cold ambient temperature, the two-way valve is set to the transmission position.

  17. Xenon Recirculation-Purification with a Heat Exchanger

    E-Print Network [OSTI]

    Giboni, K L; Choi, B; Haruyama, T; Lang, R F; Lim, K E; Melgarejo, A J; Plante, G; 10.1088/1748-0221/6/03/P03002

    2011-01-01T23:59:59.000Z

    Liquid-xenon based particle detectors have been dramatically growing in size during the last years, and are now exceeding the one-ton scale. The required high xenon purity is usually achieved by continuous recirculation of xenon gas through a high-temperature getter. This challenges the traditional way of cooling these large detectors, since in a thermally well insulated detector, most of the cooling power is spent to compensate losses from recirculation. The phase change during recondensing requires five times more cooling power than cooling the gas from ambient temperature to -100C (173 K). Thus, to reduce the cooling power requirements for large detectors, we propose to use the heat from the purified incoming gas to evaporate the outgoing xenon gas, by means of a heat exchanger. Generally, a heat exchanger would appear to be only of very limited use, since evaporation and liquefaction occur at zero temperature difference. However, the use of a recirculation pump reduces the pressure of the extracted liquid...

  18. Understanding and predicting global leaf phenology using satellite observations of vegetation 

    E-Print Network [OSTI]

    Caldararu, Silvia

    2013-07-01T23:59:59.000Z

    Leaf phenology refers to the timing of leaf life cycle events and is essential to our understanding of the earth system as it impacts the terrestrial carbon and water cycles and indirectly global climate through changes ...

  19. Cotton Leaf Grade as Influenced by Harvest Aid Regimes and Cultivar Characteristics 

    E-Print Network [OSTI]

    Eder, Zachary Phillip

    2013-08-09T23:59:59.000Z

    Cotton, Gossypium hirsutum L., leaf grade values can significantly increase with remnants of leaf and bract materials, and can result in increased ginning costs and discounts to the producer. Cotton classed through the ...

  20. Linkages between leaf traits and productivity in two resource-limited ecosystems 

    E-Print Network [OSTI]

    Chinchilla Soto, Isabel

    2014-06-30T23:59:59.000Z

    Leaf traits have long been used to classify and characterise species in natural ecosystems. In addition, leaf traits provide important information about plants’ strategies for the use of resources and can be used to improve ...

  1. Anion exchange polymer electrolytes

    DOE Patents [OSTI]

    Kim, Yu Seung; Kim, Dae Sik; Lee, Kwan-Soo

    2013-07-23T23:59:59.000Z

    Solid anion exchange polymer electrolytes and compositions comprising chemical compounds comprising a polymeric core, a spacer A, and a guanidine base, wherein said chemical compound is uniformly dispersed in a suitable solvent and has the structure: ##STR00001## wherein: i) A is a spacer having the structure O, S, SO.sub.2, --NH--, --N(CH.sub.2).sub.n, wherein n=1-10, --(CH.sub.2).sub.n--CH.sub.3--, wherein n=1-10, SO.sub.2-Ph, CO-Ph, ##STR00002## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 each are independently --H, --NH.sub.2, F, Cl, Br, CN, or a C.sub.1-C.sub.6 alkyl group, or any combination of thereof; ii) R.sub.9, R.sub.10, R.sub.11, R.sub.12, or R.sub.13 each independently are --H, --CH.sub.3, --NH.sub.2, --NO, --CH.sub.nCH.sub.3 where n=1-6, HC.dbd.O--, NH.sub.2C.dbd.O--, --CH.sub.nCOOH where n=1-6, --(CH.sub.2).sub.n--C(NH.sub.2)--COOH where n=1-6, --CH--(COOH)--CH.sub.2--COOH, --CH.sub.2--CH(O--CH.sub.2CH.sub.3).sub.2, --(C.dbd.S)--NH.sub.2, --(C.dbd.NH)--N--(CH.sub.2).sub.nCH.sub.3, where n=0-6, --NH--(C.dbd.S)--SH, --CH.sub.2--(C.dbd.O)--O--C(CH.sub.3).sub.3, --O--(CH.sub.2).sub.n--CH--(NH.sub.2)--COOH, where n=1-6, --(CH.sub.2).sub.n--CH.dbd.CH wherein n=1-6, --(CH.sub.2).sub.n--CH--CN wherein n=1-6, an aromatic group such as a phenyl, benzyl, phenoxy, methylbenzyl, nitrogen-substituted benzyl or phenyl groups, a halide, or halide-substituted methyl groups; and iii) wherein the composition is suitable for use in a membrane electrode assembly.

  2. Gas-cooled nuclear reactor

    DOE Patents [OSTI]

    Peinado, Charles O. (La Jolla, CA); Koutz, Stanley L. (San Diego, CA)

    1985-01-01T23:59:59.000Z

    A gas-cooled nuclear reactor includes a central core located in the lower portion of a prestressed concrete reactor vessel. Primary coolant gas flows upward through the core and into four overlying heat-exchangers wherein stream is generated. During normal operation, the return flow of coolant is between the core and the vessel sidewall to a pair of motor-driven circulators located at about the bottom of the concrete pressure vessel. The circulators repressurize the gas coolant and return it back to the core through passageways in the underlying core structure. If during emergency conditions the primary circulators are no longer functioning, the decay heat is effectively removed from the core by means of natural convection circulation. The hot gas rising through the core exits the top of the shroud of the heat-exchangers and flows radially outward to the sidewall of the concrete pressure vessel. A metal liner covers the entire inside concrete surfaces of the concrete pressure vessel, and cooling tubes are welded to the exterior or concrete side of the metal liner. The gas coolant is in direct contact with the interior surface of the metal liner and transfers its heat through the metal liner to the liquid coolant flowing through the cooling tubes. The cooler gas is more dense and creates a downward convection flow in the region between the core and the sidewall until it reaches the bottom of the concrete pressure vessel when it flows radially inward and up into the core for another pass. Water is forced to flow through the cooling tubes to absorb heat from the core at a sufficient rate to remove enough of the decay heat created in the core to prevent overheating of the core or the vessel.

  3. Exhaust gas purification system for lean burn engine

    DOE Patents [OSTI]

    Haines, Leland Milburn (Northville, MI)

    2002-02-19T23:59:59.000Z

    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.

  4. LEAF Outreach Team Members Needed! Description: The Office of Sustainability seeks an intern to support

    E-Print Network [OSTI]

    Hill, Wendell T.

    LEAF Outreach Team Members Needed! Description: The Office of Sustainability seeks an intern to support the implementation of the LEAF Outreach Team at the University of Maryland. LEAF is an acronym Outreach Team. You'll be working with a dedicated and knowledgeable team working to effect positive change

  5. Human impacts on leaf economics in heterogeneous landscapes: the effect of harvesting non-timber forest

    E-Print Network [OSTI]

    Sack, Lawren

    Human impacts on leaf economics in heterogeneous landscapes: the effect of harvesting non tested the effect of foliage harvest by indigenous Fulani people on leaf stoichiometry and eco- nomics with world-wide trends in leaf economics. The effect of foliage harvest on foliar nutrient concentrations

  6. Major Evolutionary Trends in Hydrogen Isotope Fractionation of Vascular Plant Leaf Waxes

    E-Print Network [OSTI]

    Edwards, Erika J.

    Major Evolutionary Trends in Hydrogen Isotope Fractionation of Vascular Plant Leaf Waxes Li Gao1 States of America Abstract Hydrogen isotopic ratios of terrestrial plant leaf waxes (dD) have been widely in leaf wax dD values in different terrestrial vascular plants are still poorly understood, hampering

  7. Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios

    E-Print Network [OSTI]

    Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios the degree to which an individual plant's leaf waxes D/H ratios are affected by these parameters remains- sitions of leaf wax n-alkanes, stem and surface waters were analyzed and compared against high

  8. Hydrogen isotopic variability in leaf waxes among terrestrial and aquatic plants around Blood Pond, Massachusetts (USA)

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Hydrogen isotopic variability in leaf waxes among terrestrial and aquatic plants around Blood Pond interpretation of the hydrogen isotope ratios of plant leaf waxes extracted from sediments requires a thor- ough at a single site to determine how leaf wax hydro- gen isotope (D/H) ratios differ in different plant types

  9. Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios

    E-Print Network [OSTI]

    Tipple, Brett

    Environmental control on eastern broadleaf forest species' leaf wax distributions and D/H ratios plant's leaf waxes D/H ratios are affected by these parameters remains in question. Understanding Coast of the US, from Florida to Maine. Hydrogen isotopic compo- sitions of leaf wax n-alkanes, stem

  10. Phenotypic Plasticity of Leaf Shape along a Temperature Gradient in Acer rubrum

    E-Print Network [OSTI]

    Royer, Dana

    Phenotypic Plasticity of Leaf Shape along a Temperature Gradient in Acer rubrum Dana L. Royer1 plasticity and genetic determination can be important for understanding how plants respond to environmental change. However, little is known about the plastic response of leaf teeth and leaf dissection

  11. Gas turbine cooling system

    DOE Patents [OSTI]

    Bancalari, Eduardo E. (Orlando, FL)

    2001-01-01T23:59:59.000Z

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

  12. Original article Energy balance storage terms and big-leaf

    E-Print Network [OSTI]

    Boyer, Edmond

    Original article Energy balance storage terms and big-leaf evapotranspiration in a mixed deciduous radiometer, which seems to be a good method. The often neglected photosynthetic heat storage may heat storage are a re- sult of complex changes of several climatic parameters. Due to the high degree

  13. Evaluation of two methods of predicting MLC leaf positions using EPID measurements

    SciTech Connect (OSTI)

    Parent, Laure; Seco, Joao; Evans, Phil M.; Dance, David R.; Fielding, Andrew [Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Downs Road, Sutton, SM2 5PT (United Kingdom); Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Fulham Road, London, SW3 6JJ (United Kingdom); School of Physical and Chemical Sciences, Queensland University of Technology, Q337 Gardens Point Campus, Brisbane, Queensland 4001 (Australia)

    2006-09-15T23:59:59.000Z

    In intensity modulated radiation treatments (IMRT), the position of the field edges and the modulation within the beam are often achieved with a multileaf collimator (MLC). During the MLC calibration process, due to the finite accuracy of leaf position measurements, a systematic error may be introduced to leaf positions. Thereafter leaf positions of the MLC depend on the systematic error introduced on each leaf during MLC calibration and on the accuracy of the leaf position control system (random errors). This study presents and evaluates two methods to predict the systematic errors on the leaf positions introduced during the MLC calibration. The two presented methods are based on a series of electronic portal imaging device (EPID) measurements. A comparison with film measurements showed that the EPID could be used to measure leaf positions without introducing any bias. The first method, referred to as the 'central leaf method', is based on the method currently used at this center for MLC leaf calibration. It mimics the manner in which leaf calibration parameters are specified in the MLC control system and consequently is also used by other centers. The second method, a new method proposed by the authors and referred to as the ''individual leaf method,'' involves the measurement of two positions for each leaf (-5 and +15 cm) and the interpolation and extrapolation from these two points to any other given position. The central leaf method and the individual leaf method predicted leaf positions at prescribed positions of -11, 0, 5, and 10 cm within 2.3 and 1.0 mm, respectively, with a standard deviation (SD) of 0.3 and 0.2 mm, respectively. The individual leaf method provided a better prediction of the leaf positions than the central leaf method. Reproducibility tests for leaf positions of -5 and +15 cm were performed. The reproducibility was within 0.4 mm on the same day and 0.4 mm six weeks later (1 SD). Measurements at gantry angles of 0 deg., 90 deg., and 270 deg. for leaf positions of -5 and +15 cm showed no significant effect of gravity. The individual leaf method could be used in various applications to improve the accuracy of radiotherapy treatment from planning to delivery. Three cases are discussed: IMRT beam verification, MLC calibration and dose calcula0010ti.

  14. Electrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows

    E-Print Network [OSTI]

    concentration) in the gas volume between glass panes of the insulated glass units (IGUs). The elimination is an option but it requires well controlled gas exchange processes. Alternatively, and from many pointsElectrochromically switched, gas-reservoir metal hydride devices with application to energy

  15. The Beckett System Recovery and Utilization of Low Grade Waste Heat From Flue Gas

    E-Print Network [OSTI]

    Henderson, W. R.; DeBiase, J. F.

    1983-01-01T23:59:59.000Z

    . During low demand periods, the unit is gas-fired and produces 150 psi steam at high efficiency. In the fall, the heat exchanger is converted to accept flue gas from the large original water tube boilers. The flue gas heats water, which preheats make...

  16. Effect of Heat Exchanger Material and Fouling on Thermoelectric Exhaust Heat Recovery

    SciTech Connect (OSTI)

    Love, Norman [University of Texas, El Paso; Szybist, James P [ORNL; Sluder, Scott [ORNL

    2011-01-01T23:59:59.000Z

    This study is conducted in an effort to better understand and improve the performance of thermoelectric heat recovery systems for automotive use. For this purpose an experimental investigation of thermoelectrics in contact with clean and fouled heat exchangers of different materials is performed. The thermoelectric devices are tested on a bench-scale thermoelectric heat recovery apparatus that simulates automotive exhaust. The thermoelectric apparatus consists of a series of thermoelectric generators contacting a hot-side and a cold-side heat exchanger. The thermoelectric devices are tested with two different hot-side heat exchanger materials, stainless steel and aluminum, and at a range of simulated exhaust gas flowrates (40 to 150 slpm), exhaust gas temperatures (240 C and 280 C), and coolant-side temperatures (40 C and 80 C). It is observed that for higher exhaust gas flowrates, thermoelectric power output increases while overall system efficiency decreases. Degradation of the effectiveness of the EGR-type heat exchangers over a period of driving is also simulated by exposing the heat exchangers to diesel engine exhaust under thermophoretic conditions to form a deposit layer. For the fouled EGR-type heat exchangers, power output and system efficiency is observed to be significantly lower for all conditions tested. The study found, however, that heat exchanger material is the dominant factor in the ability of the system to convert heat to electricity with thermoelectric generators. This finding is thought to be unique to the heat exchangers used for this study, and not a universal trend for all system configurations.

  17. Grafted methylenediphosphonate ion exchange resins

    DOE Patents [OSTI]

    Trochimcznk, A.W.; Gatrone, R.C.; Alexandratos, S.; Horwitz, E.P.

    1997-04-08T23:59:59.000Z

    An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorus. The pendent groups have the formula as shown in the patent wherein R is hydrogen, a cation or mixtures thereof; and R{sup 1} is hydrogen or an C{sub 1}-C{sub 2} alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange resin are also disclosed.

  18. Method for treating a nuclear process off-gas stream

    DOE Patents [OSTI]

    Pence, Dallas T. (San Diego, CA); Chou, Chun-Chao (San Diego, CA)

    1984-01-01T23:59:59.000Z

    Disclosed is a method for selectively removing and recovering the noble gas and other gaseous components typically emitted during nuclear process operations. The method is adaptable and useful for treating dissolver off-gas effluents released during reprocessing of spent nuclear fuels whereby to permit radioactive contaminant recovery prior to releasing the remaining off-gases to the atmosphere. Briefly, the method sequentially comprises treating the off-gas stream to preliminarily remove NO.sub.x, hydrogen and carbon-containing organic compounds, and semivolatile fission product metal oxide components therefrom; adsorbing iodine components on silver-exchanged mordenite; removing water vapor carried by said stream by means of a molecular sieve; selectively removing the carbon dioxide components of said off-gas stream by means of a molecular sieve; selectively removing xenon in gas phase by passing said stream through a molecular sieve comprising silver-exchanged mordenite; selectively separating krypton from oxygen by means of a molecular sieve comprising silver-exchanged mordenite; selectively separating krypton from the bulk nitrogen stream using a molecular sieve comprising silver-exchanged mordenite cooled to about -140.degree. to -160.degree. C.; concentrating the desorbed krypton upon a molecular sieve comprising silver-exchange mordenite cooled to about -140.degree. to -160.degree. C.; and further cryogenically concentrating, and the recovering for storage, the desorbed krypton.

  19. Information Exchange for theInformation Exchange for the Development of SustainableDevelopment of Sustainable

    E-Print Network [OSTI]

    Information Exchange for theInformation Exchange for the Development of SustainableDevelopment influenced the development ofthe development of sustainable wood process industrysustainable wood process industry substantiallysubstantially .. Information Exchange for the development of Sustainable Wood Process

  20. Anion-exchange resin-based desulfurization process

    SciTech Connect (OSTI)

    Sheth, A.C.; Strevel, S.D.

    1991-01-01T23:59:59.000Z

    The University of Tennessee Space Institute (UTSI) has been directed to further develop an anion-exchange, resin-based desulfurization concept. It is necessary that the soluble sulfates of alkali metal sorbents be desulfurized (regenerated) and recycled to make regenerative flue gas desulfurization options more attractive. In order to achieve this, a low-temperature, low-cost desulfurization process to reactivate spent alkali metal sorbents is necessary. UTSI's anion-exchange, resin-based concept is believed to satisfy this requirement. Investigators will perform the following investigations: screening of commercially available resins; process variables study and improving resin performance; optimization of resin-regeneration; evaluation of performance enhancers; development of Best-Process Schematic and related economics; and planing for proof-of-concept (POC) scale testing. 2 refs., 3 figs., 3 tabs.

  1. Hydrocarbon cracking with yttrium exchanged zeolite y catalyst

    SciTech Connect (OSTI)

    Lochow, C.F.; Kovacs, D.B.

    1987-05-12T23:59:59.000Z

    A process is described for cracking a gas oil boiling range hydrocarbon feedstock comprising the step of contacting the feedstock in a catalytic cracking zone under catalytic cracking conditions to produce convulsion products comprising gasoline with a catalyst composition. The process comprises: a Y crystalline aluminosilicate zeolite, having the structure of faujasite and having uniform pore diameters and a silica to alumina mole ratio of at least about 5; an inorganic oxide matrix; and the zeolite having been ion exchanged with a mixture of rare earths prior to compositing with the matrix; and the zeolite having been subsequently further ion exchanged with yttrium following compositing with the matrix, whereby the catalyst composition contains 0.30 to 3.0 wt% yttrium.

  2. Materials, Turbomachinery and Heat Exchangers for Supercritical CO2 Systems

    SciTech Connect (OSTI)

    Anderson, Mark; Nellis, Greg; Corradini, Michael

    2012-10-19T23:59:59.000Z

    The objective of this project is to produce the necessary data to evaluate the performance of the supercritical carbon dioxide cycle. The activities include a study of materials compatibility of various alloys at high temperatures, the heat transfer and pressure drop in compact heat exchanger units, and turbomachinery issues, primarily leakage rates through dynamic seals. This experimental work will serve as a test bed for model development and design calculations, and will help define further tests necessary to develop high-efficiency power conversion cycles for use on a variety of reactor designs, including the sodium fast reactor (SFR) and very high-temperature gas reactor (VHTR). The research will be broken into three separate tasks. The first task deals with the analysis of materials related to the high-temperature S-CO{sub 2} Brayton cycle. The most taxing materials issues with regard to the cycle are associated with the high temperatures in the reactor side heat exchanger and in the high-temperature turbine. The system could experience pressures as high as 20MPa and temperatures as high as 650°C. The second task deals with optimization of the heat exchangers required by the S-CO{sub 2} cycle; the S-CO{sub 2} flow passages in these heat exchangers are required whether the cycle is coupled with a VHTR or an SFR. At least three heat exchangers will be required: the pre-cooler before compression, the recuperator, and the heat exchanger that interfaces with the reactor coolant. Each of these heat exchangers is unique and must be optimized separately. The most challenging heat exchanger is likely the pre-cooler, as there is only about a 40°C temperature change but it operates close to the CO{sub 2} critical point, therefore inducing substantial changes in properties. The proposed research will focus on this most challenging component. The third task examines seal leakage through various dynamic seal designs under the conditions expected in the S-CO{sub 2} cycle, including supercritical, choked, and two-phase flow conditions.

  3. Iodine Loading of NO Aged Silver Exchanged Mordenite

    SciTech Connect (OSTI)

    Patton, K. K. [ORNL; Bruffey, S. H. [ORNL; Jubin, J. T. [ORNL; Walker, Jr., J. F. [ORNL

    2014-09-30T23:59:59.000Z

    In an off-gas treatment system for used nuclear fuel processing, a solid sorbent will typically be exposed to a gas stream for months at a time. This gas stream may be at elevated temperature and could contain water vapor, gaseous nitrogen oxides (NO{sub x}), nitric acid vapors, and a variety of other constituents. For this reason, it is important to evaluate the effects of long-term exposure, or aging, on proposed sorbents. Silver exchanged mordenite (AgZ) is being studied at Oak Ridge National Laboratory (ORNL) to determine its iodine sorption capacity after long term exposure to increasingly more complex chemical environments. Studies previously conducted at ORNL investigated the effects of aging reduced silver exchanged mordenite (Ag{sup 0}Z) in dry air, moist air, and NO2. This study investigated the effects of extended exposure to nitric oxide (NO) gas on the iodine capture performance of Ag{sup 0}Z. A deep bed of Ag{sup 0}Z was aged in a 1% nitric oxide (NO) air stream, and portions of the bed were removed at pre-determined intervals. After being removed from the NO stream, each sample was loaded with iodine in a thin bed configuration. These samples were analyzed by neutron activation analysis (NAA) to quantify the iodine content in the sample. Samples were removed at one week and one month. A 78% decrease in sample capacity was seen after one week of exposure, with no further decrease observed after 1 month of aging. The observed loss in capacity is larger in magnitude than previous studies exposing Ag{sup 0}Z to dry air, moist air, or NO2 gas. The aging study was terminated after one month and repeated; this successfully demonstrated the reproducibility of the results.

  4. Primer on nuclear exchange models

    SciTech Connect (OSTI)

    Hafemeister, David [Physics Department, Cal Poly University, San Luis Obispo, California (United States)

    2014-05-09T23:59:59.000Z

    Basic physics is applied to nuclear force exchange models between two nations. Ultimately, this scenario approach can be used to try and answer the age old question of 'how much is enough?' This work is based on Chapter 2 of Physics of Societal Issues: Calculations on National Security, Environment and Energy (Springer, 2007 and 2014)

  5. EXCHANGE OF DIGESTA VIA DUODENAL CANNULA IN SHEEP, A TECHNIQUE USEFUL FOR ABSORPTION STUDIES

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    by means of a harness. For the digesta exchange systems, the upper parts of 2 L plastic bottles were cut off and replaced by plastic funnels attached to the bottles by plastic tape. A reservoir bottle. Both bottles were connected to a nitrogen gas cylinder (fig. 1) by a plastic tube (8 mm diameter) inser

  6. Finance Peer Exchange Kickoff Call | Department of Energy

    Energy Savers [EERE]

    Finance Peer Exchange Kickoff Call Finance Peer Exchange Kickoff Call BetterBuildings Financing Peer Exchange Kickoff Call, Call Slides and Discussion Summary, April 28, 2011. Call...

  7. Better Buildings Workforce Peer Exchange Quality Assurance Strategies...

    Energy Savers [EERE]

    Better Buildings Workforce Peer Exchange Quality Assurance Strategies Better Buildings Workforce Peer Exchange Quality Assurance Strategies Better Buildings Workforce Peer Exchange...

  8. Phosphonic acid based ion exchange resins

    DOE Patents [OSTI]

    Horwitz, E.P.; Alexandratos, S.D.; Gatrone, R.C.; Chiarizia, R.

    1994-01-25T23:59:59.000Z

    An ion exchange resin is described for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene diphosphonic acid with styrene, acrylonitrile and divinylbenzene. 9 figures.

  9. Synergistic diffuser/heat-exchanger design

    E-Print Network [OSTI]

    Lazzara, David S. (David Sergio), 1980-

    2004-01-01T23:59:59.000Z

    The theoretical and numerical evaluation of synergistic diffusing heat-exchanger design is presented. Motivation for this development is based on current diffuser and heat-exchange technologies in cogeneration plants, which ...

  10. Phosphonic acid based ion exchange resins

    DOE Patents [OSTI]

    Horwitz, E.P.; Alexandratos, S.D.; Gatrone, R.C.; Chiarizia, R.

    1996-07-23T23:59:59.000Z

    An ion exchange resin is described for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene diphosphonic acid with styrene, acrylonitrile and divinylbenzene. 10 figs.

  11. Heat Exchanger Fouling- Prediction, Measurement and Mitigation 

    E-Print Network [OSTI]

    Peterson, G. R.

    1989-01-01T23:59:59.000Z

    The U. S. Department of Energy (DOE), Office of Industrial Programs (OIP) sponsors the development of innovative heat exchange systems. Fouling is a major and persistent cost associated with most industrial heat exchangers and nationally wastes...

  12. Ion exchange as a tertiary treatment

    E-Print Network [OSTI]

    Westervelt, Ronald David

    1968-01-01T23:59:59.000Z

    , produced the first synthetic ion exchange resins by reacting phenol with formaldehyde (2). These resins were insoluble and infusible. They found that the cation exchange properties could be greatly in- creased by substituting phenolsulfonic acid... by hydrogen ions. They could also b&. operated on the sodium cycle to exchange sodium iona for cations in solution. Adams and Holmes also produced the first anion exchange resins by reacting amines such as m-phenylene- diamine with formaldehyde...

  13. Gas sensor

    DOE Patents [OSTI]

    Schmid, Andreas K.; Mascaraque, Arantzazu; Santos, Benito; de la Figuera, Juan

    2014-09-09T23:59:59.000Z

    A gas sensor is described which incorporates a sensor stack comprising a first film layer of a ferromagnetic material, a spacer layer, and a second film layer of the ferromagnetic material. The first film layer is fabricated so that it exhibits a dependence of its magnetic anisotropy direction on the presence of a gas, That is, the orientation of the easy axis of magnetization will flip from out-of-plane to in-plane when the gas to be detected is present in sufficient concentration. By monitoring the change in resistance of the sensor stack when the orientation of the first layer's magnetization changes, and correlating that change with temperature one can determine both the identity and relative concentration of the detected gas. In one embodiment the stack sensor comprises a top ferromagnetic layer two mono layers thick of cobalt deposited upon a spacer layer of ruthenium, which in turn has a second layer of cobalt disposed on its other side, this second cobalt layer in contact with a programmable heater chip.

  14. Science Policy Exchange September 21, 2009 Columbia River Estuary Science-Policy Exchange

    E-Print Network [OSTI]

    Science Policy Exchange September 21, 2009 Summary 1 Columbia River Estuary Science-Policy Exchange and Conservation Council hosted a science-policy exchange in Astoria, Oregon. The Council supports strategies Science Advisory Board (ISAB) and the Independent Scientific Review Panel (ISRP) attended the exchange

  15. The removal of tritium from aqueous waste streams by catalyzed exchange

    SciTech Connect (OSTI)

    Schwirian, A.L.; Van Brunt, V. [Univ. of South Carolina, Columbia, SC (United States)

    1996-10-01T23:59:59.000Z

    Tritium is present in the form of tritiated light water (HTO) at several US Department of Energy sites. The average ground water concentration has been measured at one of these sites to be on the order of 1ppb. This concentration is low, but it exceeds the drinking water standard, which is 20pCi/Ml (1ppQd), by a factor of 10{sup 6}. Under the current government regulations of RCRA, CERCLA, and SARA amendments, the best technology needs to be explored for the treatment of contaminated groundwater and to pretreat discharge streams. Separation factors for various technologies involving isotopic exchange were examined. Liquid phase catalytic exchange is the chosen process for this case based on the large separation factor and the low cost of removal of contaminants from low concentration solutions. The process includes a gas-liquid separation coupled with adsorption and catalyst exchange. Liquid exchange has been explored using a dual temperature catalytic exchange column and it is this process that will be used in laboratory demonstration. A laboratory experiment based on liquid phase dual-temperature catalytic exchange is being used to show the change in effective separation factor with temperature. From this data, the dependence of the adsorption-isotope exchange on temperature will be determined.

  16. NATURAL GAS MARKET ASSESSMENT

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION NATURAL GAS MARKET ASSESSMENT PRELIMINARY RESULTS In Support.................................................................................... 6 Chapter 2: Natural Gas Demand.................................................................................................. 10 Chapter 3: Natural Gas Supply

  17. On Multiple Gluon Exchange Webs

    E-Print Network [OSTI]

    Mark Harley

    2015-05-21T23:59:59.000Z

    I present an overview of the study of infrared singularities through the eikonal approximation and the concept of webs. Our work reveals the interesting structure of an infinite subclass of webs, Multiple Gluon Exchange Webs. We find that they can be expressed as sums of products of functions depending upon only a single cusp angle, spanned by a simple basis of functions, and conjecture that this structure will hold to all orders.

  18. PRTR ion exchange vault column sampling

    SciTech Connect (OSTI)

    Cornwell, B.C.

    1995-03-14T23:59:59.000Z

    This report documents ion exchange column sampling and Non Destructive Assay (NDA) results from activities in 1994, for the Plutonium Recycle Test Reactor (PRTR) ion exchange vault. The objective was to obtain sufficient information to prepare disposal documentation for the ion exchange columns found in the PRTR Ion exchange vault. This activity also allowed for the monitoring of the liquid level in the lower vault. The sampling activity contained five separate activities: (1) Sampling an ion exchange column and analyzing the ion exchange media for purpose of waste disposal; (2) Gamma and neutron NDA testing on ion exchange columns located in the upper vault; (3) Lower vault liquid level measurement; (4) Radiological survey of the upper vault; and (5) Secure the vault pending waste disposal.

  19. Multiple pollutant removal using the condensing heat exchanger: Phase 1 final report, October 1995--July 1997

    SciTech Connect (OSTI)

    Bailey, R.T.; Jankura, B.J.; Kudlac, G.A.

    1998-06-01T23:59:59.000Z

    The Integrated Flue Gas Treatment (IFGT) system is a new concept whereby a Teflon{reg_sign} covered condensing heat exchanger is adapted to remove certain flue gas constitutents, both particulate and gaseous, while recovering low level heat. Phase 1 includes two experimental tasks. One task dealt principally with the pollutant removal capabilities of the IFGT at a scale of about 1.2MW{sub t}. The other task studied the durability of the Teflon{reg_sign} covering to withstand the rigors of abrasive wear by fly ash emitted as a result of coal combustion. The pollutant removal characteristics of the IFGT system were measured over a wide range of operating conditions. The coals tested included high, medium and low-sulfur coals. The flue gas pollutants studied included ammonia, hydrogen chloride, hydrogen fluoride, particulate, sulfur dioxide, gas phase and particle phase mercury and gas phase and particle phase trace elements. The particulate removal efficiency and size distribution was investigated. These test results demonstrated that the IFGT system is an effective device for both acid gas absorption and fine particulate collection. The durability of the Teflon{reg_sign} covered heat exchanger tubes was studied on a pilot-scale single-stage condensing heat exchanger (CHX{reg_sign}). Data from the test indicate that virtually no decrease in Teflon{reg_sign} thickness was observed for the coating on the first two rows of heat exchanger tubes, even at high inlet particulate loadings. Evidence of wear was present only at the microscopic level, and even then was very minor in severity.

  20. OXYGEN 18 EXCHANGE REACTIONS OF ALDEHYDES AND KETONES

    E-Print Network [OSTI]

    Byrn, Marianne; Calvin, Melvin

    1965-01-01T23:59:59.000Z

    OXYGEN 18 EXCHANGE REACTIONS OF ALDEHYDES AND KETONES TWO-eng-48 OXYGEN 18 EXCHANGE REACTIONS OF ALDEHYDES AND KETONES

  1. Georgia Tech Dangerous Gas

    E-Print Network [OSTI]

    Sherrill, David

    1 Georgia Tech Dangerous Gas Safety Program March 2011 #12;Georgia Tech Dangerous Gas Safety.......................................................................................................... 5 6. DANGEROUS GAS USAGE REQUIREMENTS................................................. 7 6.1. RESTRICTED PURCHASE/ACQUISITION RULES: ................................................ 7 7. FLAMMABLE GAS

  2. Host-specific strain of Stemphylium causes leaf spot disease of California spinach

    E-Print Network [OSTI]

    Koike, Steven T.; Henderson, Diana M.; Butler, Edward E.

    2001-01-01T23:59:59.000Z

    spinach culti- vars developed leaf spots within 2 weeks, while the wateras onto spinach lines used in downy mildew research. A water

  3. A Tomato Detached Leaf Assay for Chemical Genomics of an HLB Model System

    E-Print Network [OSTI]

    Patne, S.; Eulgem, T.; Roose, M. L.

    2014-01-01T23:59:59.000Z

    Leaf Assay for Chemical Genomics of an HLB Model Systemapproach known as chemical genomics with Tomato “Psyllida model of HLB. Chemical genomics involves three key stages

  4. PROSPECT-4 and 5: Advances in the leaf optical properties model separating photosynthetic pigments

    E-Print Network [OSTI]

    Gitelson, Anatoly

    Ecology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305, USA d Center reserved. Keywords: Leaf optical properties Radiative transfer model PROSPECT Hyperspectral data Pigments 1

  5. Gas Feedback on Stellar Bar Evolution

    E-Print Network [OSTI]

    Ingo Berentzen; Isaac Shlosman; Inma Martinez-Valpuesta; Clayton Heller

    2007-05-27T23:59:59.000Z

    We analyze evolution of live disk-halo systems in the presence of various gas fractions, f_gas less than 8% in the disk. We addressed the issue of angular momentum (J) transfer from the gas to the bar and its effect on the bar evolution. We find that the weakening of the bar, reported in the literature, is not related to the J-exchange with the gas, but is caused by the vertical buckling instability in the gas-poor disks and by a steep heating of a stellar velocity dispersion by the central mass concentration (CMC) in the gas-rich disks. The gas has a profound effect on the onset of the buckling -- larger f_gas brings it forth due to the more massive CMCs. The former process leads to the well-known formation of the peanut-shaped bulges, while the latter results in the formation of progressively more elliptical bulges, for larger f_gas. The subsequent (secular) evolution of the bar differs -- the gas-poor models exhibit a growing bar while gas-rich models show a declining bar whose vertical swelling is driven by a secular resonance heating. The border line between the gas-poor and -rich models lies at f_gas ~ 3% in our models, but is model-dependent and will be affected by additional processes, like star formation and feedback from stellar evolution. The overall effect of the gas on the evolution of the bar is not in a direct J transfer to the stars, but in the loss of J by the gas and its influx to the center that increases the CMC. The more massive CMC damps the vertical buckling instability and depopulates orbits responsible for the appearance of peanut-shaped bulges. The action of resonant and non-resonant processes in gas-poor and gas-rich disks leads to a converging evolution in the vertical extent of the bar and its stellar dispersion velocities, and to a diverging evolution in the bulge properties.

  6. AVTA: 2011 Nissan Leaf All-Electric Vehicle Testing Reports

    Broader source: Energy.gov [DOE]

    The Vehicle Technologies Office's Advanced Vehicle Testing Activity carries out testing on a wide range of advanced vehicles and technologies on dynamometers, closed test tracks, and on-the-road. These results provide benchmark data that researchers can use to develop technology models and guide future research and development. The following reports describe results of testing done on an all-electric 2011 Nissan Leaf. The baseline performance testing provides a point of comparison for the other test results. Taken together, these reports give an overall view of how this vehicle functions under extensive testing. This research was conducted by Idaho National Laboratory.

  7. Leaf seal for transition duct in turbine system

    DOE Patents [OSTI]

    Flanagan, James Scott; LeBegue, Jeffrey Scott; McMahan, Kevin Weston; Dillard, Daniel Jackson; Pentecost, Ronnie Ray

    2013-06-11T23:59:59.000Z

    A turbine system is disclosed. In one embodiment, the turbine system includes a transition duct. The transition duct includes an inlet, an outlet, and a passage extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis. The outlet of the transition duct is offset from the inlet along the longitudinal axis and the tangential axis. The transition duct further includes an interface member for interfacing with a turbine section. The turbine system further includes a leaf seal contacting the interface member to provide a seal between the interface member and the turbine section.

  8. LEAF Gender Mainstreaming Strategy & Checklist | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano, Hawaii9969995°,I Jump to:KumagaiLABORSTALoading...LEAF

  9. Vietnam-Lowering Emissions in Asia's Forests (LEAF) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmwelt ManagementVeraInformation LEAF[1] "Lowering

  10. Stirling engine with integrated gas combustor

    SciTech Connect (OSTI)

    Meijer, R.J.

    1990-12-18T23:59:59.000Z

    This paper discusses a Stirling engine. It comprises heat transfer stacks having a cooler, regenerator and heat exchanger stacked end-to-end with a working cylinder adjacent each of the stacks and connected therewith by a hot connecting duct, the heat exchangers including an annular cluster of circumferentially spaced tubes extending from the regenerator in a substantially axial direction to an annular manifold axially spaced from the regenerator such that at any given time during operation of the Stirling engine working fluid in the tubes is flowing in a single axial direction through the heat exchanger, a combustion chamber on an end of each of the stacks having a gas flow outlet communicating with the interior of the heat exchanger tube cluster, air inlets for each of the combustion chambers for allowing air to enter the interior of the chambers, and a nozzle within the combustion chambers for introducing a combustible fuel within the combustion chambers, whereby the combustible fuel and air combust in the combustion chambers and generate hot gases which pass between the tubes applying heat to the heat exchanger.

  11. Testing and analysis of immersed heat exchangers

    SciTech Connect (OSTI)

    Farrington, R.B.; Bingham, C.E.

    1986-08-01T23:59:59.000Z

    The objectives were to determine the performance of four immersed, ''supply-side'' heat exchangers used in solar domestic-hot-water systems; to examine the effects of flow rate, temperature difference, and coil configuration on performance; and to develop a simple model to predict the performance of immersed heat exchangers. We tested four immersed heat exchangers: a smooth coil, a finned spiral, a single-wall bayonet, and a double-wall bayonet. We developed two analyticl models and a simple finite difference model. We experimentally verified that the performance of these heat exchangers depends on the flow rate through them; we also showed that the temperature difference between the heat exchanger's inlet and the storage tank can strongly affect a heat exchanger's performance. We also compared the effects of the heat exchanger's configuration and correlated Nusselt and Rayleigh numbers for each heat exchanger tested. The smooth coil had a higher effectiveness than the others, while the double-wall bayonet had a very low effectiveness. We still do not know the long-term effectiveness of heat exchangers regarding scale accumulation, nor do we know the effects of very low flow rates on a heat exchanger's performance.

  12. Ion exchange purification of scandium

    DOE Patents [OSTI]

    Herchenroeder, L.A.; Burkholder, H.R.

    1990-10-23T23:59:59.000Z

    An improvement in purification of scandium through ion exchange chromatography is disclosed in which the oxidation potential of the eluting solution is altered by the addition of potassium chlorate or ammonium chloride so that removal of contaminants is encouraged. The temperature, pH and concentration of the eluent HEDTA are controlled in order to maintain the scandium in the column while minimizing dilution of the scandium band. Recovery of scandium is improved by pumping dilute scandium over the column prior to stripping the scandium and precipitation. This eliminates the HEDTA ion and other monovalent cations contaminating the scandium band. This method maximizes recovery of scandium while maintaining purity. 2 figs.

  13. Sandia Energy - Heat Exchanger Development

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand RequirementsCoatingsUltra-High-Voltage SiliconEnergyFailureGlobalHeat Exchanger

  14. Reliability, Availability and Maintainability Considerations for Gas Turbine Cogeneration Systems

    E-Print Network [OSTI]

    Meher-Homji, C. B.; Focke, A. B.

    1984-01-01T23:59:59.000Z

    RELIABILITY, AVAILABILITY AND MAINTAINABILITY CONSIDERATIONS FOR GAS TURBINE COGENERATION SYSTEMS Gyrus B. Meher-Homji and Alfred B. Focke Boyce Engineering International, Inc. Houston, Texas ABSTRACT The success of a cogeneration system... the choice of the number of gas turbines and waste heat recovery units to be utilized down to small components, such as pumps, dampers, hea t exchangers and auxiliary systems. . Rand M studies must be initiated in the conceptual phases of the project...

  15. Acoustically enhanced heat exchange and drying apparatus

    DOE Patents [OSTI]

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

    1989-01-01T23:59:59.000Z

    A heat transfer apparatus includes a first chamber having a first heat transfer gas inlet, a second heat transfer gas inlet, and an outlet. A first heat transfer gas source provides a first gas flow to the first chamber through the first heat transfer gas inlet. A second gas flow through a second chamber connected to the side of the first chamber, generates acoustic waves which bring about acoustical coupling of the first and second gases in the acoustically augmented first chamber. The first chamber may also include a material inlet for receiving material to be dried, in which case the gas outlet serves as a dried material and gas outlet.

  16. Proton Exchange Membranes for Fuel Cells

    SciTech Connect (OSTI)

    Devanathan, Ramaswami

    2010-11-01T23:59:59.000Z

    Proton exchange membrane, also known as polymer electrolyte membrane, fuel cells (PEMFCs) offer the promise of efficient conversion of chemical energy of fuel, such as hydrogen or methanol, into electricity with minimal pollution. Their widespread use to power zero-emission automobiles as part of a hydrogen economy can contribute to enhanced energy security and reduction in greenhouse gas emissions. However, the commercial viability of PEMFC technology is hindered by high cost associated with the membrane electrode assembly (MEA) and poor membrane durability under prolonged operation at elevated temperature. Membranes for automotive fuel cell applications need to perform well over a period comparable to the life of an automotive engine and under heavy load cycling including start-stop cycling under sub-freezing conditions. The combination of elevated temperature, changes in humidity levels, physical stresses and harsh chemical environment contribute to membrane degradation. Perfluorinated sulfonic acid (PFSA)-based membranes, such as Nafion®, have been the mainstay of PEMFC technology. Their limitations, in terms of cost and poor conductivity at low hydration, have led to continuing research into membranes that have good proton conductivity at elevated temperatures above 120 °C and under low humidity conditions. Such membranes have the potential to avoid catalyst poisoning, simplify fuel cell design and reduce the cost of fuel cells. Hydrocarbon-based membranes are being developed as alternatives to PFSA membranes, but concerns about chemical and mechanical stability and durability remain. Novel anhydrous membranes based on polymer gels infused with protic ionic liquids have also been recently proposed, but considerable fundamental research is needed to understand proton transport in novel membranes and evaluate durability under fuel cell operating conditions. In order to advance this promising technology, it is essential to rationally design the next generation of PEMs based on an understanding of chemistry, membrane morphology and proton transport obtained from experiment, theory and computer simulation.

  17. DHE (downhole heat exchangers). [Downhole Heat Exchangers (DHE)

    SciTech Connect (OSTI)

    Culver, G.

    1990-11-01T23:59:59.000Z

    The use of downhole heat exchangers (DHE) for residential or commercial space and domestic water heating and other applications has several desirable features. Systems are nearly or completely passive -- that is, no or very little geothermal water or steam is produced from the well either reducing or completely eliminating surface environmental concerns and the need for disposal systems or injection wells. Initial cost of pumps and installation are eliminated or reduced along with pumping power costs and maintenance costs associated with pumping often corrosive geothermal fluids. Many residential and small commercial systems do not require circulating pumps because the density difference in the incoming and outgoing sides of the loop are sufficient to overcome circulating friction losses in the entire system. The major disadvantage of DHEs is their dependence on natural heat flow. In areas where geological conditions provide high permeability and a natural hydraulic gradient, DHEs can provide a substantial quantity of heat. A single 500-ft (152 m) well in Klamath Falls, Oregon, supplies over one megawatt thermal and output is apparently limited by the surface area of pipe that can be installed in the well bore. In contrast, DHEs used in conjunction with heat pumps may supply less than 8 KW from a well of similar depth. Here output is limited by conductive heat flow with perhaps a small contribution from convection near the well bore. The highest capacity DHE reported to date, in Turkey, supplies 6 MW thermal from an 820-ft (250 m) well. There were two main goals for this project. The first was to gather, disseminate and exchange internationally information on DHES. The second was to perform experiments that would provide insight into well bore/aquifer interaction and thereby provide more information on which to base DHE designs. 27 refs., 31 figs., 3 tabs.

  18. ELSEVIER Aquatic Botany 58 (1997) 99-112 Leaf dynamics and production of a Zostera marina

    E-Print Network [OSTI]

    Boudouresque, Charles F.

    1997-01-01T23:59:59.000Z

    of the species (30°N) in Baja California, Mexico. Shoots had an average of 4.0 leaves, and 1.0 new leaf appeared the average number of leaves present pet shoot peaked during the September-December period. A maximum leaf

  19. Mycosphaerella species associated with leaf disease of Eucalyptus globulus in Ethiopia

    E-Print Network [OSTI]

    Mycosphaerella species associated with leaf disease of Eucalyptus globulus in Ethiopia By Alemu, Forestry Research Sector, Addis Ababa, Ethiopia; 2 Department of Plant Pathology and Microbiology, Tree spp. are among the most widely planted exotic trees in Ethiopia. Several damaging leaf pathogens

  20. Long-term impact of a leaf miner outbreak on the performance of quaking aspen

    E-Print Network [OSTI]

    Ickert-Bond, Steffi

    ARTICLE Long-term impact of a leaf miner outbreak on the performance of quaking aspen Diane Wagner and Patricia Doak Abstract: The aspen leaf miner, Phyllocnistis populiella Cham., has caused widespread and severe damage to aspen in the boreal forests of western North America for over a decade. We suppressed P

  1. Two fungal symbioses collide: endophytic fungi are not welcome in leaf-cutting ant gardens

    E-Print Network [OSTI]

    Bermingham, Eldredge

    Two fungal symbioses collide: endophytic fungi are not welcome in leaf-cutting ant gardens Sunshine, while the leaf material they provide to their garden is usually filled with endophytic fungi. The ants and their cultivar may interact with hundreds of endophytic fungal species, yet little is known about

  2. Two fungal symbioses collide: endophytic fungi are not welcome in leaf-cutting ant gardens

    E-Print Network [OSTI]

    Bermingham, Eldredge

    Two fungal symbioses collide: endophytic fungi are not welcome in leaf-cutting ant gardens Sunshine with their fungal garden, while the leaf material they provide to their garden is usually filled with endophytic fungi. The ants and their cultivar may interact with hundreds of endophytic fungal species, yet little

  3. Phytologia (April 2012) 94(1) 91 SEASONAL VARIATION IN THE LEAF ESSENTIAL OIL OF

    E-Print Network [OSTI]

    Adams, Robert P.

    Phytologia (April 2012) 94(1) 91 SEASONAL VARIATION IN THE LEAF ESSENTIAL OIL OF TAXODIUM DISTICHUM Robert_Adams@baylor.edu ABSTRACT The leaf essential oil of Taxodium distichum is dominated by -pinene (63-69%) with moderate amounts of limonene, - phellandrene, myrcene and -pinene. Oil yield increased from April (3.45 mg

  4. Leaf Area Distribution of Tomato Plants as Influenced by Polyethylene Mulch

    E-Print Network [OSTI]

    Decoteau, Dennis R.

    of polyethylene (plastic) mulch surface color (white versus black) on leaf area distribution of tomato and appearance. In commercial tomato production, polyethylene (plastic) mulches are often used to increase yieldsLeaf Area Distribution of Tomato Plants as Influenced by Polyethylene Mulch Surface Color Dennis R

  5. Fuel gas conditioning process

    DOE Patents [OSTI]

    Lokhandwala, Kaaeid A. (Union City, CA)

    2000-01-01T23:59:59.000Z

    A process for conditioning natural gas containing C.sub.3+ hydrocarbons and/or acid gas, so that it can be used as combustion fuel to run gas-powered equipment, including compressors, in the gas field or the gas processing plant. Compared with prior art processes, the invention creates lesser quantities of low-pressure gas per unit volume of fuel gas produced. Optionally, the process can also produce an NGL product.

  6. Exchange effects in a cold plasma

    E-Print Network [OSTI]

    Ekman, Robin; Brodin, Gert

    2015-01-01T23:59:59.000Z

    We have studied the exchange corrections to linear electrostatic wave propagation in a plasma using a quantum kinetic formalism. Specifically we have considered the zero temperature limit. In order to simplify the calculations we have focused on the long wavelength limit, i.e. wavelengths much longer than the de Broglie wavelength. For the case of ion-acoustic waves we have calculated the exchange correction both to the damping rate and the real part of the frequency. For Langmuir waves the frequency shift due to exchange effects is found. Our results are compared with the frequency shifts deduced from commonly used exchange potentials which are computed from density functional theory.

  7. THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERS

    E-Print Network [OSTI]

    Mertol, Atila

    2012-01-01T23:59:59.000Z

    The Performance of Solar Water Heater With Natural Ci rcul2-6, 1980 THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERSJune 1980 THERMOSIPHON WATER HEATERS WITH HEAT EXCHANGERS*

  8. Manufacturing serendipity: Chicago Innovation Exchange enhancing...

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

    Social Media Photos Videos Fact Sheets, Brochures and Reports Summer Science Writing Internship John Flavin, Executive Director of the Chicago Innovation Exchange, started a small...

  9. Sandia National Laboratories: information exchange on performance...

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

    exchange on performance indicators Sandia Contributes to International Electrotechnical Commission IEC 61400-26 Availability Standard On June 12, 2014, in Analysis, Distribution...

  10. NETL's Energy Data eXchange

    SciTech Connect (OSTI)

    None

    2014-07-16T23:59:59.000Z

    A brief tour around NETL's Energy Data Exchange site, where researchers can upload data or look at data from another researcher.

  11. Sandia National Laboratories: molecularly engineered ion exchanger

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

    ion exchanger ECIS and UOP (a Honewell Company): CSTs Clean Radioactive Waste in Fukushima and Worldwide On February 14, 2013, in Energy, Materials Science, Nuclear Energy,...

  12. NETL's Energy Data eXchange

    ScienceCinema (OSTI)

    None

    2014-07-22T23:59:59.000Z

    A brief tour around NETL's Energy Data Exchange site, where researchers can upload data or look at data from another researcher.

  13. Efficiency Exchange Conference Highlights Energy Efficiency Innovation...

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

    Efficiency Exchange Conference Highlights Energy Efficiency Innovations and Trends Northwest electric power industry connects on the latest energy efficiency programs and...

  14. Energy Efficiency Exchange 2015 | Department of Energy

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

    Energy Efficiency Exchange 2015 August 11-13, 2015, Phoenix Convention Center As the nation's largest energy consumer, the federal government has a tremendous opportunity and clear...

  15. Low-Cost Microchannel Heat Exchanger

    Energy Savers [EERE]

    process Produce prototype heat exchangers for electronics cooling and high pressure waste heat recovery power system applications Test integrity and confirm high...

  16. Efficiency Exchange highlights energy efficiency innovations...

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

    Efficiency Exchange highlights energy efficiency innovations and trends Northwest electric power industry connects on the latest energy efficiency programs and strategies Portland,...

  17. A Lightweight Material for Heat Exchange Applications

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

    exchangers have been manufactured from metal because metals are effective in conducting thermal energy. Plastics, although cheaper, lighter, and less energy intensive to make...

  18. Spatial variation of dosimetric leaf gap and its impact on dose delivery

    SciTech Connect (OSTI)

    Kumaraswamy, Lalith K., E-mail: Lalith.Kumaraswamy@roswellpark.org [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 and Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Schmitt, Jonathan D. [Department of Radiation Medicine, RadAmerica, LLC-MedStar Health, Baltimore, Maryland 21237 (United States); Bailey, Daniel W. [Department of Radiation Oncology, Northside Hospital, Atlanta, Georgia 30342 (United States); Xu, Zheng Zheng [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 and Department of Physiology and Biophysics, State University of New York at Buffalo, Buffalo, New York 14260 (United States); Podgorsak, Matthew B. [Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, New York 14263 (United States); Department of Physiology and Biophysics, State University of New York at Buffalo, Buffalo, New York 14260 (United States)

    2014-11-01T23:59:59.000Z

    Purpose: During dose calculation, the Eclipse treatment planning system (TPS) retracts the multileaf collimator (MLC) leaf positions by half of the dosimetric leaf gap (DLG) value (measured at central axis) for all leaf positions in a dynamic MLC plan to accurately model the rounded leaf ends. The aim of this study is to map the variation of DLG along the travel path of each MLC leaf pair and quantify how this variation impacts delivered dose. Methods: 6 MV DLG values were measured for all MLC leaf pairs in increments of 1.0 cm (from the line intersecting the CAX and perpendicular to MLC motion) to 13.0 cm off axis distance at dmax. The measurements were performed on two Varian linear accelerators, both employing the Millennium 120-leaf MLCs. The measurements were performed at several locations in the beam with both a Sun Nuclear MapCHECK device and a PTW pinpoint ion chamber. Results: The measured DLGs for the middle 40 MLC leaf pairs (each 0.5 cm width) at positions along a line through the CAX and perpendicular to MLC leaf travel direction were very similar, varying maximally by only 0.2 mm. The outer 20 MLC leaf pairs (each 1.0 cm width) have much lower DLG values, about 0.3–0.5 mm lower than the central MLC leaf pair, at their respective central line position. Overall, the mean and the maximum variation between the 0.5 cm width leaves and the 1.0 cm width leaf pairs are 0.32 and 0.65 mm, respectively. Conclusions: The spatial variation in DLG is caused by the variation of intraleaf transmission through MLC leaves. Fluences centered on the CAX would not be affected since DLG does not vary; but any fluences residing significantly off axis with narrow sweeping leaves may exhibit significant dose differences. This is due to the fact that there are differences in DLG between the true DLG exhibited by the 1.0 cm width outer leaves and the constant DLG value utilized by the TPS for dose calculation. Since there are large differences in DLG between the 0.5 cm width leaf pairs and 1.0 cm width leaf pairs, there is a need to correct the TPS plans, especially those with high modulation (narrow dynamic MLC gap), with 2D variation of DLG.

  19. Theoretical Gas Phase Mass Transfer Coefficients for Endogenous Gases in the Lungs

    E-Print Network [OSTI]

    George, Steven C.

    Theoretical Gas Phase Mass Transfer Coefficients for Endogenous Gases in the Lungs PETER CONDORELLI, is produced within the tissue of the airways of the lungs.16 As an intercellular messenger, NO is involved is available regarding the basic gas exchange dynamics of NO in the lungs. Ingested ethanol EtOH is transported

  20. ORIGINAL PAPER Controls over leaf and litter calcium concentrations among

    E-Print Network [OSTI]

    Minnesota, University of

    only 10% as much biomass and height at low relative to high Ca supply, whereas the other species to variation in soil pH, exchangeable Ca, soil base saturation, forest floor turnover rates, and earthworm of varying Ca supply. We also investigated whether trees species with high Ca concentrations in green leaves

  1. Energy Economizer for Low Temperature Stack Gas: A Case Study

    E-Print Network [OSTI]

    Tipton, J. A.

    1979-01-01T23:59:59.000Z

    , the burner air supply is preheated by passing through the heat exchanger. Sensitive design problems that had to be resolved were: Overall cost-effectiveness; below dew point cooling of stack gas causing acid corrosion; and selection of an effective heat...

  2. High temperature, low expansion, corrosion resistant ceramic and gas turbine

    DOE Patents [OSTI]

    Rauch, Sr., Harry W. (Lionville, PA)

    1981-01-01T23:59:59.000Z

    The present invention relates to ZrO.sub.2 -MgO-Al.sub.2 O.sub.3 -SiO.sub.2 ceramic materials having improved thermal stability and corrosion resistant properties. The utilization of these ceramic materials as heat exchangers for gas turbine engines is also disclosed.

  3. Abstract Leaf-cutting ants exhibit an aggressive alarm response. Yet in most alarm reactions, not all of the ants

    E-Print Network [OSTI]

    that harvest dicotyledonous plants. Leaf-cutting ants form colonies of up to 7 million workers (Jonkman 1980

  4. Exploration of Ion-Exchanged Glass for Seals Applications

    E-Print Network [OSTI]

    Ghanbari, Roushan

    2012-10-19T23:59:59.000Z

    ........................................................................................................ 34 Figure 15. Semitransparent overlay of two images created using the MATLAB ........... 35 Figure 16. Binary, composite image of samples 5 and 7 ............................................... 37 Figure 17. Histogram of „3 leaf? composite images... with normal fit overlay .................. 41 Figure 18. Probability plot of „3 leaf? composite images with normal fit ...................... 42 Figure 19. Histogram of „4 leaf? composite images with normal fit overlay .................. 43 x Page Figure...

  5. The influence of clover and fertilizer on yield and leaf percentage of four warm-season grasses

    E-Print Network [OSTI]

    Conrad, Billy Ervin

    1958-01-01T23:59:59.000Z

    of calculation is used. gtl (ly)fdpl f tdg tg(~A'tt cut in the early leaf, late leaf, and flowering stages to sheep. The per- centage of total digestible nutrients was found to be similar in the two leaf stages but much lower in the flowering stage...

  6. Ecological differentiation in xylem cavitation resistance is associated with stem and leaf structural traitspce_2231 137..148

    E-Print Network [OSTI]

    Sack, Lawren

    Ecological differentiation in xylem cavitation resistance is associated with stem and leaf ABSTRACT Cavitation resistance is a critical determinant of drought tolerance in tropical tree species how vulnerability to cavitation (P50) related to dry season leaf water poten- tials and stem and leaf

  7. Isotope exchange kinetics in metal hydrides I : TPLUG model.

    SciTech Connect (OSTI)

    Larson, Rich; James, Scott Carlton; Nilson, Robert H.

    2011-05-01T23:59:59.000Z

    A one-dimensional isobaric reactor model is used to simulate hydrogen isotope exchange processes taking place during flow through a powdered palladium bed. This simple model is designed to serve primarily as a platform for the initial development of detailed chemical mechanisms that can then be refined with the aid of more complex reactor descriptions. The one-dimensional model is based on the Sandia in-house code TPLUG, which solves a transient set of governing equations including an overall mass balance for the gas phase, material balances for all of the gas-phase and surface species, and an ideal gas equation of state. An energy equation can also be solved if thermodynamic properties for all of the species involved are known. The code is coupled with the Chemkin package to facilitate the incorporation of arbitrary multistep reaction mechanisms into the simulations. This capability is used here to test and optimize a basic mechanism describing the surface chemistry at or near the interface between the gas phase and a palladium particle. The mechanism includes reversible dissociative adsorptions of the three gas-phase species on the particle surface as well as atomic migrations between the surface and the bulk. The migration steps are more general than those used previously in that they do not require simultaneous movement of two atoms in opposite directions; this makes possible the creation and destruction of bulk vacancies and thus allows the model to account for variations in the bulk stoichiometry with isotopic composition. The optimization code APPSPACK is used to adjust the mass-action rate constants so as to achieve the best possible fit to a given set of experimental data, subject to a set of rigorous thermodynamic constraints. When data for nearly isothermal and isobaric deuterium-to-hydrogen (D {yields} H) and hydrogen-to-deuterium (H {yields} D) exchanges are fitted simultaneously, results for the former are excellent, while those for the latter show pronounced deviations at long times. These discrepancies can be overcome by postulating the presence of a surface poison such as carbon monoxide, but this explanation is highly speculative. When the method is applied to D {yields} H exchanges intentionally poisoned by known amounts of CO, the fitting results are noticeably degraded from those for the nominally CO-free system but are still tolerable. When TPLUG is used to simulate a blowdown-type experiment, which is characterized by large and rapid changes in both pressure and temperature, discrepancies are even more apparent. Thus, it can be concluded that the best use of TPLUG is not in simulating realistic exchange scenarios, but in extracting preliminary estimates for the kinetic parameters from experiments in which variations in temperature and pressure are intentionally minimized.

  8. WAGES, FLEXIBLE EXCHANGE RATES, AND MACROECONOMIC POLICY*

    E-Print Network [OSTI]

    WAGES, FLEXIBLE EXCHANGE RATES, AND MACROECONOMIC POLICY* JEFFREY SACHS In an open economy with a floaLing exchange rate, the efficacy of fiscal and monetary policy depends fundamentally on the wage rate depreciation, while fiscal expansion has no output effect. These results hold only when real wages

  9. Configure Outlook 2010 with Exchange Server

    E-Print Network [OSTI]

    Qiu, Weigang

    Configure Outlook 2010 with Exchange Server #12;1. Navigate to the Windows Start Menu (or press. #12;14. E-mail server settings will now auto configure. 15. Once the Auto Account Setup is configured server settings or additional server types. 3. Click the Next > button. #12;4. Select Microsoft Exchange

  10. Business Time in the Foreign Exchange Markets

    E-Print Network [OSTI]

    Edinburgh, University of

    Business Time in the Foreign Exchange Markets Mark J L Orr Centre for Cognitive Science Edinburgh University June 1997 #12; Business Time in the Foreign Exchange Markets Mark J L Orr y Centre for Cognitive; Contents 1 Introduction 4 2 The Price Change Scaling Law 5 3 Business Time 7 4 The BZW Data 11 5 Volatility

  11. Design Development Analyses in Support of a Heat pipe-Brayton Cycle Heat Exchanger

    SciTech Connect (OSTI)

    Steeve, Brian E. [NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Kapernick, Richard J. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2004-07-01T23:59:59.000Z

    One of the power systems under consideration for future space exploration applications, including nuclear electric propulsion or as a planetary surface power source, is a heat pipe-cooled reactor coupled to a Brayton cycle. In this system, power is transferred from the heat pipes to the Brayton gas via a heat exchanger attached to the heat pipes. This paper discusses the fluid, thermal and structural analyses that were performed in support of the design of the heat exchanger to be tested in the SAFE-100 experimental program at the Marshall Space Flight Center. An important consideration throughout the design development of the heat exchanger was its capability to be utilized for higher power and temperature applications. This paper also discusses this aspect of the design and presents designs for specific applications that are under consideration. (authors)

  12. AVTA: 2013 Nissan Leaf All-Electric Vehicle Testing Reports

    Broader source: Energy.gov [DOE]

    The Vehicle Technologies Office's Advanced Vehicle Testing Activity carries out testing on a wide range of advanced vehicles and technologies on dynamometers, closed test tracks, and on-the-road. These results provide benchmark data that researchers can use to develop technology models and guide future research and development. The following reports describe early results of testing done on an all-electric 2013 Nissan Leaf. Baseline data, which provides a point of comparison for the other test results, was collected at two different research laboratories. Baseline and other data collected at Idaho National Laboratory is in the attached documents. Baseline and battery testing data collected at Argonne National Laboratory is available in summary and CSV form on the Argonne Downloadable Dynometer Database site (http://www.anl.gov/energy-systems/group/downloadable-dynamometer-databas...). Taken together, these reports give an overall view of how this vehicle functions under extensive testing.

  13. Finite temperature analysis of a quasi2D dipolar gas

    E-Print Network [OSTI]

    Ticknor, Christopher

    2012-01-01T23:59:59.000Z

    We present finite temperature analysis of a quasi2D dipolar gas. To do this, we use the Hartree Fock Bogoliubov method within the Popov approximation. This formalism is a set of non-local equations containing the dipole-dipole interaction and the condensate and thermal correlation functions, which are solved self-consistently. We detail the numerical method used to implement the scheme. We present density profiles for a finite temperature dipolar gas in quasi2D, and compare these results to a gas with zero-range interactions. Additionally, we analyze the excitation spectrum and study the impact of the thermal exchange.

  14. Acoustically enhanced heat exchange and drying apparatus

    DOE Patents [OSTI]

    Bramlette, T.T.; Keller, J.O.

    1987-07-10T23:59:59.000Z

    A heat transfer drying apparatus includes an acoustically augmented heat transfer chamber for receiving material to be dried. The chamber includes a first heat transfer gas inlet, a second heat transfer gas inlet, a material inlet, and a gas outlet which also serves as a dried material and gas outlet. A non-pulsing first heat transfer gas source provides a first drying gas to the acoustically augmented heat transfer chamber through the first heat transfer gas inlet. A valveless, continuous second heat transfer gas source provides a second drying gas to the acoustically augmented heat transfer chamber through the second heat transfer gas inlet. The second drying gas also generates acoustic waves which bring about acoustical coupling with the gases in the acoustically augmented heat transfer chamber. The second drying gas itself oscillates at an acoustic frequency of approximately 180 Hz due to fluid mechanical motion in the gas. The oscillations of the second heat transfer gas coupled to the first heat transfer gas in the acoustically augmented heat transfer chamber enhance heat and mass transfer by convection within the chamber. 3 figs.

  15. Gas Storage Act (Illinois)

    Broader source: Energy.gov [DOE]

    Any corporation which is engaged in or desires to engage in, the distribution, transportation or storage of natural gas or manufactured gas, which gas, in whole or in part, is intended for ultimate...

  16. Gas Companies Program (Tennessee)

    Broader source: Energy.gov [DOE]

    The Gas Companies program is a set of rules that encourage the development of the natural gas industry in Tennessee. They empower gas companies to lay piped and extend conductors through the...

  17. Gas Utilities (Maine)

    Broader source: Energy.gov [DOE]

    Rules regarding the production, sale, and transfer of manufactured gas will also apply to natural gas. This section regulates natural gas utilities that serve ten or more customers, more than one...

  18. Gas Utilities (New York)

    Broader source: Energy.gov [DOE]

    This chapter regulates natural gas utilities in the State of New York, and describes standards and procedures for gas meters and accessories, gas quality, line and main extensions, transmission and...

  19. Future of Natural Gas

    Office of Environmental Management (EM)

    of Natural Gas Bill Eisele, CEM SC Electric & Gas Co Hosted by: FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR November 5-6, 2014 Cape Canaveral. Florida Agenda * Gas Facts *...

  20. Industrial Gas Turbines

    Broader source: Energy.gov [DOE]

    A gas turbine is a heat engine that uses high-temperature, high-pressure gas as the working fluid. Part of the heat supplied by the gas is converted directly into mechanical work. High-temperature,...

  1. Supervisory Natural Gas Analyst

    Broader source: Energy.gov [DOE]

    The Department of Energys Office of Fossil Energy, Office of Oil and Natural Gas, Office of Oil and Gas Global Security and Supply (FE) is responsible for regulating natural gas imports and exports...

  2. Oxidation catalysts comprising metal exchanged hexaaluminate wherein the metal is Sr, Pd, La, and/or Mn

    DOE Patents [OSTI]

    Wickham, David (Boulder, CO); Cook, Ronald (Lakewood, CO)

    2008-10-28T23:59:59.000Z

    The present invention provides metal-exchanged hexaaluminate catalysts that exhibit good catalytic activity and/or stability at high temperatures for extended periods with retention of activity as combustion catalysts, and more generally as oxidation catalysts, that make them eminently suitable for use in methane combustion, particularly for use in natural gas fired gas turbines. The hexaaluminate catalysts of this invention are of particular interest for methane combustion processes for minimization of the generation of undesired levels (less than about 10 ppm) of NOx species. Metal exchanged hexaaluminate oxidation catalysts are also useful for oxidation of volatile organic compounds (VOC), particularly hydrocarbons. Metal exchanged hexaaluminate oxidation catalysts are further useful for partial oxidation, particularly at high temperatures, of reduced species, particularly hydrocarbons (alkanes and alkenes).

  3. Natural Gas Monthly Update

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

    other liquids including biofuels and natural gas liquids. Natural Gas Exploration and reserves, storage, imports and exports, production, prices, sales. Electricity Sales, revenue...

  4. Gas Production Tax (Texas)

    Broader source: Energy.gov [DOE]

    A tax of 7.5 percent of the market value of natural gas produced in the state of Texas is imposed on every producer of gas.

  5. Historical Natural Gas Annual

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

    8 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at...

  6. Natural gas dehydration apparatus

    DOE Patents [OSTI]

    Wijmans, Johannes G; Ng, Alvin; Mairal, Anurag P

    2006-11-07T23:59:59.000Z

    A process and corresponding apparatus for dehydrating gas, especially natural gas. The process includes an absorption step and a membrane pervaporation step to regenerate the liquid sorbent.

  7. Historical Natural Gas Annual

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

    6 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at...

  8. Historical Natural Gas Annual

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

    7 The Historical Natural Gas Annual contains historical information on supply and disposition of natural gas at the national, regional, and State level as well as prices at...

  9. Leaf dynamics of little bluestem and brownseed paspalum in response to herbivory

    E-Print Network [OSTI]

    Brown, Joel Raymond

    1983-01-01T23:59:59.000Z

    and nongrazed periods in a short- duration grazing system stocked at four levels. LITERATURE REVIEW Otqt f Id' ir i L Leaf growth in grasses originates at the apical meri stem or growing point. In the vegetative stage of plant growth the apical meristem...- dividual leaves may be determined by their position on the ti11er. Leaf primordia and axillary bud structures are produced in a continual se- quence at the apical meri stem. Initiation of leaf primordi a is commonly thought to occur in response...

  10. Vitrification of cesium-contaminated organic ion exchange resin

    SciTech Connect (OSTI)

    Sargent, T.N. Jr. [Clemson Univ., SC (United States)

    1994-08-01T23:59:59.000Z

    Vitrification has been declared by the Environmental Protection Agency (USEPA) as the Best Demonstrated Available Technology (BDAT) for the permanent disposal of high-level radioactive waste. Savannah River Site currently uses a sodium tetraphenylborate (NaTPB) precipitation process to remove Cs-137 from a wastewater solution created from the processing of nuclear fuel. This process has several disadvantages such as the formation of a benzene waste stream. It has been proposed to replace the precipitation process with an ion exchange process using a new resorcinol-formaldehyde resin developed by Savannah River Technical Center (SRTC). Preliminary tests, however, showed that problems such as crust formation and a reduced final glass wasteform exist when the resin is placed in the melter environment. The newly developed stirred melter could be capable of overcoming these problems. This research explored the operational feasibility of using the stirred tank melter to vitrify an organic ion exchange resin. Preliminary tests included crucible studies to determine the reducing potential of the resin and the extent of oxygen consuming reactions and oxygen transfer tests to approximate the extent of oxygen transfer into the molten glass using an impeller and a combination of the impeller and an external oxygen transfer system. These preliminary studies were used as a basis for the final test which was using the stirred tank melter to vitrify nonradioactive cesium loaded organic ion exchange resin. Results from this test included a cesium mass balance, a characterization of the semi-volatile organic compounds present in the off gas as products of incomplete combustion (PIC), a qualitative analysis of other volatile metals, and observations relating to the effect the resin had on the final redox state of the glass.

  11. Skew chicane based betatron eigenmode exchange module

    DOE Patents [OSTI]

    Douglas, David (Yorktown, VA)

    2010-12-28T23:59:59.000Z

    A skewed chicane eigenmode exchange module (SCEEM) that combines in a single beamline segment the separate functionalities of a skew quad eigenmode exchange module and a magnetic chicane. This module allows the exchange of independent betatron eigenmodes, alters electron beam orbit geometry, and provides longitudinal parameter control with dispersion management in a single beamline segment with stable betatron behavior. It thus reduces the spatial requirements for multiple beam dynamic functions, reduces required component counts and thus reduces costs, and allows the use of more compact accelerator configurations than prior art design methods.

  12. Exchange effects in magnetized quantum plasmas

    E-Print Network [OSTI]

    Trukhanova, Mariya Iv

    2015-01-01T23:59:59.000Z

    We apply the many-particle quantum hydrodynamics including the Coulomb exchange interaction to magnetized quantum plasmas. We consider a number of wave phenomenon under influence of the Coulomb exchange interaction. Since the Coulomb exchange interaction affects longitudinal and transverse-longitudinal waves we focus our attention to the Langmuir waves, Trivelpiece-Gould waves, ion-acoustic waves in non-isothermal magnetized plasmas, the dispersion of the longitudinal low-frequency ion-acoustic waves and low-frequencies electromagnetic waves at $T_{e}\\gg T_{i}$ . We obtained the numerical simulation of the dispersion properties of different types of waves.

  13. Heat Exchanger Support Bracket Design Calculations

    SciTech Connect (OSTI)

    Rucinski, Russ; /Fermilab

    1995-01-12T23:59:59.000Z

    This engineering note documents the design of the heat exchanger support brackets. The heat exchanger is roughly 40 feet long, 22 inches in diameter and weighs 6750 pounds. It will be mounted on two identical support brackets that are anchored to a concrete wall. The design calculations were done for one bracket supporting the full weight of the heat exchanger, rounded up to 6800 pounds. The design follows the American Institute of Steel Construction (AISC) Manual of steel construction, Eighth edition. All calculated stresses and loads on welds were below allowables.

  14. Propagation of light in low pressure gas

    E-Print Network [OSTI]

    Jacques Moret-Bailly

    2012-04-13T23:59:59.000Z

    The criticism by W. E. Lamb, W. Schleich, M. Scully, C. Townes of a simplified quantum electrodynamics which represents the photon as a true particle is illustrated. Collisions being absent in low-pressure gas, exchanges of energy are radiative and coherent. Thin shells of plasma containing atoms in a model introduced by Str\\"omgren are superradiant, seen as circles possibly dotted. Spectral radiance of novae has magnitude of laser radiance, and column densities are large in nebulae: Superradiance, multiphoton effects, etc., work in astrophysics. The superradiant beams induce multiphotonic scatterings of light emitted by the stars, brightening the limbs of plasma bubbles and darkening the stars. In excited atomic hydrogen, impulsive Raman scatterings shift frequencies of light. Microwaves exchanged with the Pioneer probes are blueshifted, simulating anomalous accelerations. Substituting coherence for wrong calculations in astrophysical papers, improves results, avoids "new physics".

  15. Exploration of Ion-Exchanged Glass for Seals Applications 

    E-Print Network [OSTI]

    Ghanbari, Roushan

    2012-10-19T23:59:59.000Z

    to the same point load, the fracture patterns produced can be compared and used as a verification measure. This technology has the potential to be used in passive seal applications. Each image was categorized depending on its fracture as a "3 leaf" or "4 leaf...

  16. Better Buildings Workforce Peer Exchange Call: Kick-off | Department...

    Energy Savers [EERE]

    Documents & Publications Better Buildings Working with Utilities Peer Exchange Call: Kick-off Administering Nonprofit Energy Efficiency Programs Finance Peer Exchange Kickoff Call...

  17. Better Buildings Working with Utilities Peer Exchange Call: Kick...

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

    April 21, 2011 Call Slides and Discussion Summary More Documents & Publications Finance Peer Exchange Kickoff Call Better Buildings Workforce Peer Exchange Call: Kick-off...

  18. Transition Path Sampling of Water Exchange Rates and Mechanisms...

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

    Path Sampling of Water Exchange Rates and Mechanisms around Aqueous Ions . Transition Path Sampling of Water Exchange Rates and Mechanisms around Aqueous Ions . Abstract: The rates...

  19. Amine-Amine Exchange in Aminium-Methanesulfonate Aerosols. |...

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

    Amine-Amine Exchange in Aminium-Methanesulfonate Aerosols. Amine-Amine Exchange in Aminium-Methanesulfonate Aerosols. Abstract: Aerosol particles are ubiquitous in the atmosphere...

  20. Gate-tunable exchange coupling between cobalt clusters on graphene...

    Office of Scientific and Technical Information (OSTI)

    Accepted Manuscript: Gate-tunable exchange coupling between cobalt clusters on graphene Citation Details Title: Gate-tunable exchange coupling between cobalt clusters on...

  1. Rapid electron exchange between surface-exposed bacterial cytochromes...

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

    electron exchange between surface-exposed bacterial cytochromes and Fe(III) minerals. Rapid electron exchange between surface-exposed bacterial cytochromes and Fe(III) minerals....

  2. Proton Exchange Membrane Fuel Cells for Electrical Power Generation...

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

    Proton Exchange Membrane Fuel Cells for Electrical Power Generation On-Board Commercial Airplanes Proton Exchange Membrane Fuel Cells for Electrical Power Generation On-Board...

  3. Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange...

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

    Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange Facilities Case study details the U.S. Department of Defense (DOD) Exchange (formerly the Army and Air Force...

  4. A Thermoelectric Generator with an Intermediate Heat Exchanger...

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

    A Thermoelectric Generator with an Intermediate Heat Exchanger for Automotive Waste Heat Recovery System A Thermoelectric Generator with an Intermediate Heat Exchanger for...

  5. Lessons Learned: Peer Exchange Calls Fall 2014 | Department of...

    Energy Savers [EERE]

    Calls Fall 2014 Lessons Learned: Peer Exchange Calls Fall 2014 Better Buildings Residential Network, Lessons Learned: Peer Exchange Calls Fall 2014. Lessons Learned: Peer...

  6. Supercritical Carbon Dioxide Turbo-Expander and Heat Exchangers...

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

    Supercritical Carbon Dioxide Turbo-Expander and Heat Exchangers Supercritical Carbon Dioxide Turbo-Expander and Heat Exchangers This fact sheet describes a supercritical carbon...

  7. Program Sustainability Peer Exchange Call: Transitioning to a...

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

    Program Sustainability Peer Exchange Call: Transitioning to a Utility Funded Program Environment: What Do I Need to Know? (January 17, 2013) Program Sustainability Peer Exchange...

  8. Transportation and Greenhouse Gas Mitigation

    E-Print Network [OSTI]

    Lutsey, Nicholas P.; Sperling, Dan

    2008-01-01T23:59:59.000Z

    fuels (eg diesel, compressed natural gas). Electricity (infossil fuels, such as compressed natural gas and liquefied

  9. Compressed gas manifold

    DOE Patents [OSTI]

    Hildebrand, Richard J. (Edgemere, MD); Wozniak, John J. (Columbia, MD)

    2001-01-01T23:59:59.000Z

    A compressed gas storage cell interconnecting manifold including a thermally activated pressure relief device, a manual safety shut-off valve, and a port for connecting the compressed gas storage cells to a motor vehicle power source and to a refueling adapter. The manifold is mechanically and pneumatically connected to a compressed gas storage cell by a bolt including a gas passage therein.

  10. Noble gas magnetic resonator

    DOE Patents [OSTI]

    Walker, Thad Gilbert; Lancor, Brian Robert; Wyllie, Robert

    2014-04-15T23:59:59.000Z

    Precise measurements of a precessional rate of noble gas in a magnetic field is obtained by constraining the time averaged direction of the spins of a stimulating alkali gas to lie in a plane transverse to the magnetic field. In this way, the magnetic field of the alkali gas does not provide a net contribution to the precessional rate of the noble gas.

  11. OIL & GAS INSTITUTE Introduction

    E-Print Network [OSTI]

    Mottram, Nigel

    OIL & GAS INSTITUTE CONTENTS Introduction Asset Integrity Underpinning Capabilities 2 4 4 6 8 9 10 COMPETITIVENESS UNIVERSITY of STRATHCLYDE OIL & GAS INSTITUTE OIL & GAS EXPERTISE AND PARTNERSHIPS #12;1 The launch of the Strathclyde Oil & Gas Institute represents an important step forward for the University

  12. Backyard Leaf Composting Franklin Flower, Extension Specialist Emeritus in Environmental Science

    E-Print Network [OSTI]

    Rainforth, Emma C.

    Backyard Leaf Composting Franklin Flower, Extension Specialist Emeritus in Environmental Science. Thisprocessinvolves primarily the microbial decomposition of organic matter. Compost - the end result - is a dark. The Composting Process Compostingspeedsnaturaldecompositionundersemi- controlled conditions. Raw organic

  13. 4. Heat exchangers; Steam, steam processes

    E-Print Network [OSTI]

    Zevenhoven, Ron

    pictures: KJ05 Temperature distributions of fluid in (a) counterflow, (b) parallel flow, and (c) 1 shell pass and 2 tubes passes. #12;7/74 Heat exchangers: Geometries /3 Temperature distribution in a counter

  14. Markets, distribution, and exchange after societal cataclysm

    SciTech Connect (OSTI)

    Cantor, R.A.; Henry, S.; Rayner, S. (Oak Ridge National Lab., TN (USA); Eastern Michigan Univ., Ypsilanti, MI (USA). Dept. of Sociology; Oak Ridge National Lab., TN (USA))

    1989-11-01T23:59:59.000Z

    The report identifies constraints and opportunities for the restoration of economic exchange following nuclear war. Four survival scenarios are postulated based on high or low levels of damage to (1) institutions that signal trading opportunities, reduce transaction costs, and regulate and enforce contracts, and (2) resources that are used to create and define wealth. The four scenarios are best case, worst case, resource abundance, and an institution intensive case. Three kinds of literature were reviewed, (1) the economics literature on formal markets, (2) the sociological literature on informal markets, and (3) the economic anthropology literature on pre-capitalist and pre-industrial exchange. From this corpus a set of non-market and market exchange structures are derived and rendered as rules vectors describing their operation. Each of the four survival scenarios is expounded as a subset of the possible exchange structures that is logically compatible with the constraints defining that scenario. 242 refs.

  15. Configuring Entourage 2008 w/ Exchange Web Services. Note: These instruction assume that the Exchange Web Services (EWS) Update

    E-Print Network [OSTI]

    Blackwell, Keith

    Configuring Entourage 2008 w/ Exchange Web Services. Note: These instruction assume that the Exchange Web Services (EWS) Update , also known as Entourage 13.0, has already been

  16. Optimum fertilization rate for intermediate leaf cucumber grown for once-over mechanical harvest

    E-Print Network [OSTI]

    Konderla, Timothy Michael

    1992-01-01T23:59:59.000Z

    OPTIMUM FERTILIZATION RATE FOR INTERMEDIATE LEAF CUCUMBER GROWN FOR ONCE-OVER MECHANICAL HARVEST A Thesis by TIMOTHY MICHAEL KONDERLA Submitted to the Office of Graduate Studies of Texas A& M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1992 Major Subject: Horticulture OPTIMUM FERTILIZATION RATE FOR INTERMEDIATE LEAF CUCUMBER GROWN FOR ONCE-OVER MECHANICAL HARVEST A Thesis by TIMOTHY MICHAEL KONDERLA Approved as to style...

  17. Distribution of soil and leaf water potentials of mature grapefruit trees under three soil moisture regimes

    E-Print Network [OSTI]

    Prathapar, Sanmugam Ahembaranathan

    1982-01-01T23:59:59.000Z

    DISTRIBUTION OF SOIL AND LEAF WATER POTENTIALS OF MATURE GRAPEFRUIT TREES UNDER THREE SOIL MOISTURE REGIMES A Thesis by SANMUGAM AHEMBARANATHAN PRATHAPAP, Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE May 1982 Major Subject; Agricultural Engineering DISTRIBUTION OF SOIL AND LEAF WATER POTENTIALS OF MATURE GRAPEFRUIT TREES UNDER THREE SOIL MOISTURE REGIMES A Thesis by SANMUGAM AHEMBARANATHAN PRATHAPAR...

  18. Natural gas monthly

    SciTech Connect (OSTI)

    NONE

    1998-01-01T23:59:59.000Z

    The Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the Natural Gas Monthly features articles designed to assist readers in using and interpreting natural gas information.

  19. Synthesis gas production by mixed conducting membranes with integrated conversion into liquid products

    DOE Patents [OSTI]

    Nataraj, Shankar (Allentown, PA); Russek, Steven Lee (Allentown, PA); Dyer, Paul Nigel (Allentown, PA)

    2000-01-01T23:59:59.000Z

    Natural gas or other methane-containing feed gas is converted to a C.sub.5 -C.sub.19 hydrocarbon liquid in an integrated system comprising an oxygenative synthesis gas generator, a non-oxygenative synthesis gas generator, and a hydrocarbon synthesis process such as the Fischer-Tropsch process. The oxygenative synthesis gas generator is a mixed conducting membrane reactor system and the non-oxygenative synthesis gas generator is preferably a heat exchange reformer wherein heat is provided by hot synthesis gas product from the mixed conducting membrane reactor system. Offgas and water from the Fischer-Tropsch process can be recycled to the synthesis gas generation system individually or in combination.

  20. Heat Exchanger Technologies for Distillation Columns

    E-Print Network [OSTI]

    Polley, G. T.

    Heat Exchanger Technologies for Distillation Columns G.T.Polley Pinchtechnology.com In this paper we look at the challenges that improvements in energy efficiency of distillation systems presents the heat exchanger designer. We examine... condensate sub-cooling. So, if this condensate subsequently requires re-heating both energy and capital have been wasted. If the condensate forms a feed to another distillation column it results in increased energy consumption if that separation...

  1. Heat exchanger for power generation equipment

    DOE Patents [OSTI]

    Nirmalan, Nirm Velumylm; Bowman, Michael John

    2005-06-14T23:59:59.000Z

    A heat exchanger for a turbine is provided wherein the heat exchanger comprises a heat transfer cell comprising a sheet of material having two opposed ends and two opposed sides. In addition, a plurality of concavities are disposed on a surface portion of the sheet of material so as to cause hydrodynamic interactions and affect a heat transfer rate of the turbine between a fluid and the concavities when the fluid is disposed over the concavities.

  2. Integrated Approach to Revamping Heat Exchangers Networks

    E-Print Network [OSTI]

    Glass, K. E.; Dhole, V.; Wang, Y.

    geometry configurations for a given set of process conditions. Develop simulation model (in Aspen Plus) incorporating rigorous heat exchanger (Aspen Hetran) models for the 1) Validate existing preheat train performance & evaluate the existing and de...-bottlenecked cases de-bottlenecked performance Initiate pinch analysis (using Aspen Pinch) directly 2) Determine feasible energy saving from (Aspen Plus) simulation results Heat exchanger network pinch analysis (using Aspen Pinch) incorporating rigorous (Aspen...

  3. SILICON CARBIDE CERAMICS FOR COMPACT HEAT EXCHANGERS

    SciTech Connect (OSTI)

    DR. DENNIS NAGLE; DR. DAJIE ZHANG

    2009-03-26T23:59:59.000Z

    Silicon carbide (SiC) materials are prime candidates for high temperature heat exchangers for next generation nuclear reactors due to their refractory nature and high thermal conductivity at elevated temperatures. This research has focused on demonstrating the potential of liquid silicon infiltration (LSI) for making SiC to achieve this goal. The major advantage of this method over other ceramic processing techniques is the enhanced capability of making high dense, high purity SiC materials in complex net shapes. For successful formation of net shape SiC using LSI techniques, the carbon preform reactivity and pore structure must be controlled to allow the complete infiltration of the porous carbon structure which allows complete conversion of the carbon to SiC. We have established a procedure for achieving desirable carbon properties by using carbon precursors consisting of two readily available high purity organic materials, crystalline cellulose and phenolic resin. Phenolic resin yields a glassy carbon with low chemical reactivity and porosity while the cellulose carbon is highly reactive and porous. By adjusting the ratio of these two materials in the precursor mixtures, the properties of the carbons produced can be controlled. We have identified the most favorable carbon precursor composition to be a cellulose resin mass ratio of 6:4 for LSI formation of SiC. The optimum reaction conditions are a temperature of 1800 C, a pressure of 0.5 Torr of argon, and a time of 120 minutes. The fully dense net shape SiC material produced has a density of 2.96 g cm{sup -3} (about 92% of pure SiC) and a SiC volume fraction of over 0.82. Kinetics of the LSI SiC formation process was studied by optical microscopy and quantitative digital image analysis. This study identified six reaction stages and provided important understanding of the process. Although the thermal conductivity of pure SiC at elevated temperatures is very high, thermal conductivities of most commercial SiC materials are much lower due to phonon scattering by impurities (e.g., sintering aids located at the grain boundaries of these materials). The thermal conductivity of our SiC was determined using the laser flash method and it is 214 W/mK at 373 K and 64 W/mK at 1273 K. These values are very close to those of pure SiC and are much higher than those of SiC materials made by industrial processes. This SiC made by our LSI process meets the thermal properties required for use in high temperature heat exchanger. Cellulose and phenolic resin carbons lack the well-defined atomic structures associated with common carbon allotropes. Atomic-scale structure was studied using high resolution transmission electron microscopy (HRTEM), nitrogen gas adsorption and helium gas pycnometry. These studies revealed that cellulose carbon exhibits a very high degree of atomic disorder and angstrom-scale porosity. It has a density of only 93% of that of pure graphite, with primarily sp2 bonding character and a low concentration of graphene clusters. Phenolic resin carbon shows more structural order and substantially less angstrom-scale porosity. Its density is 98% of that of pure graphite, and Fourier transform analysis of its TEM micrographs has revealed high concentrations of sp3 diamond and sp2 graphene nano-clusters. This is the first time that diamond nano-clusters have been observed in carbons produced from phenolic resin. AC and DC electrical measurements were made to follow the thermal conversion of microcrystalline cellulose to carbon. This study identifies five regions of electrical conductivity that can be directly correlated to the chemical decomposition and microstructural evolution during carbonization. In Region I, a decrease in overall AC conductivity occurs due to the initial loss of the polar groups from cellulose molecules. In Region II, the AC conductivity starts to increase with heat treatment temperature due to the formation and growth of conducting carbon clusters. In Region III, a further increase of AC conductivity with increasing heat treatment temperature is obs

  4. Design of a continuous fiber ceramic composite heat exchanger for high-temperature, high-pressure applications

    SciTech Connect (OSTI)

    Cho, S.M.; Seltzer, A.H.; Narayanan, T.V. [Foster Wheeler Development Corp., Livingston, NJ (United States); Shah, A.C.; Weddell, J.K. [DuPont Lanxide Composites Inc., Newark, DE (United States)

    1996-12-31T23:59:59.000Z

    A conceptual design of a continuous fiber ceramic composite (CFCC) heat exchanger for high-temperature, high-pressure applications is presented. The CFCC materials under consideration are SiC reinforced with SiC fibers manufactured using the continuous vapor infiltration process and alumina reinforced with SiC or alumina fibers manufactured using the directed metal oxidation process. These composite materials are highly resistant to high-temperature corrosive environment and possess a greater creep strength than metallic materials. Heat exchangers constructed of CFCC material may be utilized for high-temperature, high-pressure applications such as air/gas heaters in advanced energy systems and high-temperature energy recovery systems. This paper presents a design of a gas-to-air CFCC heat exchanger for the high temperature advanced furnace (HITAF) in the high-performance power system (HIPPS). The 1.38 MPa (200 psia) air is heated from 760 C (1,400 F) to 982 C (1,800 F) using the combustion products at 1,650 C (3,000 F). The heat exchanger is of a cross-parallel/counter flow type in which the tube-side air flow makes a combined parallel and counter flow arrangement with a cross-flowing combustion gas in such a way that the maximum CFCC tube temperature will not exceed a 1,260 C (2,300 F) design limit. The main heat transfer mechanism from the external hot gas to the tube-side air is that of gaseous radiation for the first few rows of the tubes, followed by convective heat transfer across the remainder of the tube bundle. The design characteristics of this high-temperature, high-pressure CFCC heat exchanger with supporting thermal, flow, structural, and vibrational analyses are presented in detail in the paper.

  5. Cost of Gas Adjustment for Gas Utilities (Maine)

    Broader source: Energy.gov [DOE]

    This rule, applicable to gas utilities, establishes rules for calculation of gas cost adjustments, procedures to be followed in establishing gas cost adjustments and refunds, and describes reports...

  6. Anion-exchange resin-based desulfurization process. Quarterly technical progress report, Januray 1, 1992--March 31, 1992

    SciTech Connect (OSTI)

    Sheth, A.C.; Strevel, S.D.; Dharmapurikar, R.

    1992-07-01T23:59:59.000Z

    Under DOE Grant No. FG22-90PC90309, the University of Tennessee Space Institute (UTSI) is contracted to further develop its anion-exchange, resin-based desulfurization concept to desulfurize alkali metal sulfates. From environmental as well as economic viewpoints, it is necessary to remove soluble sulfates from the wastes created by flue gas desulfurization systems. In order to do this economically, a low-cost desulfurization process for spent sorbents is necessary. UTSI`s anion-exchange resin-based desulfurization concept is believed to satisfy these requirements.

  7. Development of nondestructive evaluation techniques for high-temperature ceramic heat exchanger components. Tenth quarterly report, January-March 1980

    SciTech Connect (OSTI)

    Kupperman, D.S.; Yuhas, D.; Caines, M.J.

    1980-04-01T23:59:59.000Z

    The effectiveness of several conventional and unconventional NDE techniques for specific high-temperature ceramic components was determined. Techniques under study at ANL include dye-enhanced radiography, acoustic microscopy, conventional ultrasonic testing, acoustic-emission detection, acoustic impact testing, holography, interferometry, infrared scanning, internal friction measurements, and overload proof testing. The current effort involves SiC heat-exchanger tubes; previous ceramic NDE efforts at ANL have involved silicon-nitride gas-turbine rotors. Recent results on inspection of SiC heat-exchanger tubing by means of ultrasonic acoustic microscopy techniques and efforts initiated and planned for NDE of ceramic joints are discussed.

  8. The effects of outdoor heat exchanger hydrophobic treatment on the performance of an air source heat pump

    E-Print Network [OSTI]

    Parker, Brandon DeWayne

    1995-01-01T23:59:59.000Z

    mode, the system must remove heat from the cold outdoor air and provide it to the conditioned space. To remove the heat from the outdoor air, the refrigerant entering the outdoor heat exchanger must be colder than the outdoor air. The outdoor air... is pulled across the heat exchanger surface by the outdoor fan Hence, the cold liquid refrigerant passing through the evaporator coil receives heat from the outdoor ambient air passing over the coil, causing the refrigerant to vaporize into a cool gas...

  9. Enhanced membrane gas separations

    SciTech Connect (OSTI)

    Prasad, R.

    1993-07-13T23:59:59.000Z

    An improved membrane gas separation process is described comprising: (a) passing a feed gas stream to the non-permeate side of a membrane system adapted for the passage of purge gas on the permeate side thereof, and for the passage of the feed gas stream in a counter current flow pattern relative to the flow of purge gas on the permeate side thereof, said membrane system being capable of selectively permeating a fast permeating component from said feed gas, at a feed gas pressure at or above atmospheric pressure; (b) passing purge gas to the permeate side of the membrane system in counter current flow to the flow of said feed gas stream in order to facilitate carrying away of said fast permeating component from the surface of the membrane and maintaining the driving force for removal of the fast permeating component through the membrane from the feed gas stream, said permeate side of the membrane being maintained at a subatmospheric pressure within the range of from about 0.1 to about 5 psia by vacuum pump means; (c) recovering a product gas stream from the non-permeate side of the membrane; and (d) discharging purge gas and the fast permeating component that has permeated the membrane from the permeate side of the membrane, whereby the vacuum conditions maintained on the permeate side of the membrane by said vacuum pump means enhance the efficiency of the gas separation operation, thereby reducing the overall energy requirements thereof.

  10. Interfacial Co nanolayers for enhancing interlayer exchange coupling in antiferromagnetic interlayer exchange coupling media

    E-Print Network [OSTI]

    Laughlin, David E.

    Interfacial Co nanolayers for enhancing interlayer exchange coupling in antiferromagnetic of the interlayer coupling strength has been achieved by depositing Co nanolayers on both sides of the Ru layer in a conventional CoCrPt/Ru/CoCrPt antiferromagnetic interlayer exchange coupling structure. The interlayer coupling

  11. Progress Report for Diffusion Welding of the NGNP Process Application Heat Exchangers

    SciTech Connect (OSTI)

    R.E. Mizia; D.E. Clark; M.V. Glazoff; T.E. Lister; T.L. Trowbridge

    2011-12-01T23:59:59.000Z

    The U.S. Department of Energy selected the high temperature gas-cooled reactor as the basis for the Next Generation Nuclear Plant (NGNP). The NGNP will demonstrate the use of nuclear power for electricity, hydrogen production, and process heat applications. The NGNP Project is currently investigating the use of metallic, diffusion welded, compact heat exchangers to transfer heat from the primary (reactor side) heat transport system to the secondary heat transport system. An intermediate heat exchanger will transfer this heat to downstream applications such as hydrogen production, process heat, and electricity generation. The channeled plates that make up the heat transfer surfaces of the intermediate heat exchanger will have to be assembled into an array by diffusion welding. This report describes the preliminary results of a scoping study that evaluated the diffusion welding process parameters and the resultant mechanical properties of diffusion welded joints using Alloy 800H. The long-term goal of the program is to progress towards demonstration of small heat exchanger unit cells fabricated with diffusion welds. Demonstration through mechanical testing of the unit cells will support American Society of Mechanical Engineers rules and standards development, reduce technical risk, and provide proof of concept for heat exchanger fabrication methods needed to deploy heat exchangers in several potential NGNP configurations.1 Researchers also evaluated the usefulness of modern thermodynamic and diffusion computational tools (Thermo-Calc and Dictra) in optimizing the parameters for diffusion welding of Alloy 800H. The modeling efforts suggested a temperature of 1150 C for 1 hour with an applied pressure of 5 MPa using 15 {micro}m nickel foil as joint filler to reduce chromium oxidation on the welded surfaces. Good agreement between modeled and experimentally determined concentration gradients was achieved

  12. Nanoheterostructure Cation Exchange: Anionic Framework Conservation

    SciTech Connect (OSTI)

    Jain, Prashant K.; Amirav, Lilac; Aloni, Shaul; Alivisatos, A. Paul

    2010-05-11T23:59:59.000Z

    In ionic nanocrystals the cationic sub-lattice can be replaced with a different metal ion via a fast, simple, and reversible place-exchange, allowing post-synthetic modification of the composition of the nanocrystal, while preserving its size and shape. Here, we demonstrate for the first time that during such an exchange, the anionic framework of the crystal is preserved. When applied to nanoheterostructures, this phenomenon ensures that compositional interfaces within the heterostructure are conserved throughout the transformation. For instance, a morphology composed of a CdSe nanocrystal embedded in a CdS rod (CdSe/CdS) was exchanged to a PbSe/PbS nanorod via a Cu2Se/Cu2S structure. During every exchange cycle, the seed size and position within the nanorod were preserved, as evident by excitonic features, Z-contrast imaging, and elemental line-scans. Anionic framework conservation extends the domain of cation exchange to the design of more complex and unique nanostructures.

  13. COMPUTATIONAL OPTIMIZATION OF GAS COMPRESSOR ...

    E-Print Network [OSTI]

    2015-02-26T23:59:59.000Z

    Feb 26, 2015 ... When considering cost-optimal operation of gas transport net- works ..... The four most frequently used drive types are gas turbines, gas driven.

  14. Purchased Gas Adjustment Rules (Tennessee)

    Broader source: Energy.gov [DOE]

    The Purchased Gas Adjustment Rules are implemented by the Tennessee Regulatory Authority (Authority). Purchased Gas Adjustment (PGA) Rules are intended to permit the company/LDC (local gas...

  15. Transportation and Greenhouse Gas Mitigation

    E-Print Network [OSTI]

    Lutsey, Nicholas P.; Sperling, Dan

    2008-01-01T23:59:59.000Z

    natural gas and liquefied petroleum gas have continued to make small contributions to transportation,transportation actions include electric power sector actions, eg coal to natural gas

  16. Natural gas annual 1996

    SciTech Connect (OSTI)

    NONE

    1997-09-01T23:59:59.000Z

    This document provides information on the supply and disposition of natural gas to a wide audience. The 1996 data are presented in a sequence that follows natural gas from it`s production to it`s end use.

  17. Recirculating rotary gas compressor

    DOE Patents [OSTI]

    Weinbrecht, J.F.

    1992-02-25T23:59:59.000Z

    A positive displacement, recirculating Roots-type rotary gas compressor is described which operates on the basis of flow work compression. The compressor includes a pair of large diameter recirculation conduits which return compressed discharge gas to the compressor housing, where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, and is particularly applicable to refrigeration or other applications requiring condensation of a vapor. 12 figs.

  18. Recirculating rotary gas compressor

    DOE Patents [OSTI]

    Weinbrecht, John F. (601 Oakwood Loop, NE., Albuquerque, NM 87123)

    1992-01-01T23:59:59.000Z

    A positive displacement, recirculating Roots-type rotary gas compressor which operates on the basis of flow work compression. The compressor includes a pair of large diameter recirculation conduits (24 and 26) which return compressed discharge gas to the compressor housing (14), where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers (10 and 12) and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, and is particularly applicable to refrigeration or other applications requiring condensation of a vapor.

  19. Gas and Oil (Maryland)

    Broader source: Energy.gov [DOE]

    The Department of the Environment has the authority to enact regulations pertaining to oil and gas production, but it cannot prorate or limit the output of any gas or oil well. A permit from the...

  20. Microminiature gas chromatograph

    DOE Patents [OSTI]

    Yu, Conrad M. (Antioch, CA)

    1996-01-01T23:59:59.000Z

    A microminiature gas chromatograph (.mu.GC) comprising a least one silicon wafer, a gas injector, a column, and a detector. The gas injector has a normally closed valve for introducing a mobile phase including a sample gas in a carrier gas. The valve is fully disposed in the silicon wafer(s). The column is a microcapillary in silicon crystal with a stationary phase and is mechanically connected to receive the mobile phase from the gas injector for the molecular separation of compounds in the sample gas. The detector is mechanically connected to the column for the analysis of the separated compounds of sample gas with electronic means, e.g., ion cell, field emitter and PIN diode.

  1. Microminiature gas chromatograph

    DOE Patents [OSTI]

    Yu, C.M.

    1996-12-10T23:59:59.000Z

    A microminiature gas chromatograph ({mu}GC) comprising a least one silicon wafer, a gas injector, a column, and a detector. The gas injector has a normally closed valve for introducing a mobile phase including a sample gas in a carrier gas. The valve is fully disposed in the silicon wafer(s). The column is a microcapillary in silicon crystal with a stationary phase and is mechanically connected to receive the mobile phase from the gas injector for the molecular separation of compounds in the sample gas. The detector is mechanically connected to the column for the analysis of the separated compounds of sample gas with electronic means, e.g., ion cell, field emitter and PIN diode. 7 figs.

  2. A self-circulating heat exchanger for use in stirling and thermoacoustic-stirling engines

    SciTech Connect (OSTI)

    Backhaus, S. N. (Scott N.); Reid, R. S. (Robert Stowers)

    2004-01-01T23:59:59.000Z

    A major technical hurdle to the implementation of large Stirling engines or thermoacoustic engines is the reliability, performance, and manufacturability of the hot heat exchanger that brings high-temperature heat into the engine. Unlike power conversion devices that utilize steady flow, the oscillatory nature of the flow in Stirling and thermoacoustic engines restricts the length of a traditional hot heat exchanger to a peak-to-peak gas displacement, which is usually around 0.2 meters or less. To overcome this restriction, a new hot heat exchanger has been devised that uses a fluid diode in a looped pipe, which is resonantly driven by the oscillating gas pressure in the engine itself, to circulate the engine's working fluid around the loop. Instead of thousands of short, intricately interwoven passages that must be individually sealed, this new design consists of a few pipes that are typically 10 meters long. This revolutionary approach eliminates thousands of hermetic joints, pumps the engine's working fluid to and from a remote heat source without using moving parts, and does so without compromising on heat transfer surface area. Test data on a prototype loop integrated with a 1-kW thermoacoustic engine will be presented.

  3. Residual gas analysis device

    DOE Patents [OSTI]

    Thornberg, Steven M. (Peralta, NM)

    2012-07-31T23:59:59.000Z

    A system is provided for testing the hermeticity of a package, such as a microelectromechanical systems package containing a sealed gas volume, with a sampling device that has the capability to isolate the package and breach the gas seal connected to a pulse valve that can controllably transmit small volumes down to 2 nanoliters to a gas chamber for analysis using gas chromatography/mass spectroscopy diagnostics.

  4. Natural gas annual 1995

    SciTech Connect (OSTI)

    NONE

    1996-11-01T23:59:59.000Z

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1995 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1991 to 1995 for each Census Division and each State. Annual historical data are shown at the national level.

  5. Natural gas annual 1994

    SciTech Connect (OSTI)

    NONE

    1995-11-17T23:59:59.000Z

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1994 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1990 to 1994 for each Census Division and each State. Annual historical data are shown at the national level.

  6. Method and apparatus for fuel gas moisturization and heating

    DOE Patents [OSTI]

    Ranasinghe, Jatila (Niskayuna, NY); Smith, Raub Warfield (Ballston Lake, NY)

    2002-01-01T23:59:59.000Z

    Fuel gas is saturated with water heated with a heat recovery steam generator heat source. The heat source is preferably a water heating section downstream of the lower pressure evaporator to provide better temperature matching between the hot and cold heat exchange streams in that portion of the heat recovery steam generator. The increased gas mass flow due to the addition of moisture results in increased power output from the gas and steam turbines. Fuel gas saturation is followed by superheating the fuel, preferably with bottom cycle heat sources, resulting in a larger thermal efficiency gain compared to current fuel heating methods. There is a gain in power output compared to no fuel heating, even when heating the fuel to above the LP steam temperature.

  7. Cryogenic system with GM cryocooler for krypton, xenon separation from hydrogen-helium purge gas

    SciTech Connect (OSTI)

    Chu, X. X.; Zhang, D. X.; Qian, Y.; Liu, W. [Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 (China); Zhang, M. M.; Xu, D. [Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 (China)

    2014-01-29T23:59:59.000Z

    In the thorium molten salt reactor (TMSR), fission products such as krypton, xenon and tritium will be produced continuously in the process of nuclear fission reaction. A cryogenic system with a two stage GM cryocooler was designed to separate Kr, Xe, and H{sub 2} from helium purge gas. The temperatures of two stage heat exchanger condensation tanks were maintained at about 38 K and 4.5 K, respectively. The main fluid parameters of heat transfer were confirmed, and the structural heat exchanger equipment and cold box were designed. Designed concentrations after cryogenic separation of Kr, Xe and H{sub 2} in helium recycle gas are less than 1 ppb.

  8. A mathematical model of a gas-fed oxygen reduction porous electrode

    E-Print Network [OSTI]

    Ridge, Stephen James

    1988-01-01T23:59:59.000Z

    . Load Op HEO 4e 4H 4H 4e H~O No Gas Flow Chamber El Current. Collector E3 Porous Electrode H Proton Exchange Membrane Fig. 1. Proton exchange membrane fuel cell schematic Os(g) + 4H+(aq) + 4e ~ 2Hz 0(l) (21 The water leaves the porous...A MATHEMATICAL MODEL OF A GAS-FED OXYGEN REDUCTION POROUS ELECTRODE A Thesis by STEPHEN JAMES RIDGE Submitted to the Graduate College of Texas ASSAM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE...

  9. Valve for gas centrifuges

    DOE Patents [OSTI]

    Hahs, C.A.; Rurbage, C.H.

    1982-03-17T23:59:59.000Z

    The invention is pneumatically operated valve assembly for simulatenously (1) closing gas-transfer lines connected to a gas centrifuge or the like and (2) establishing a recycle path between two on the lines so closed. The value assembly is especially designed to be compact, fast-acting, reliable, and comparatively inexpensive. It provides large reductions in capital costs for gas-centrifuge cascades.

  10. Gas Cylinders: Proper Management

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    Compressed Gas Cylinders: Proper Management And Use Published by the Office of Environment, Health;1 Introduction University of California, Berkeley (UC Berkeley) departments that use compressed gas cylinders (MSDS) and your department's Job Safety Analyses (JSAs). Talk to your gas supplier about hands

  11. Static gas expansion cooler

    DOE Patents [OSTI]

    Guzek, J.C.; Lujan, R.A.

    1984-01-01T23:59:59.000Z

    Disclosed is a cooler for television cameras and other temperature sensitive equipment. The cooler uses compressed gas ehich is accelerated to a high velocity by passing it through flow passageways having nozzle portions which expand the gas. This acceleration and expansion causes the gas to undergo a decrease in temperature thereby cooling the cooler body and adjacent temperature sensitive equipment.

  12. Natural Gas Exploration

    E-Print Network [OSTI]

    Boyer, Elizabeth W.

    . Exploration and extraction of natural gas from the Marcellus shale is a potentially valuable economic stimulus for landowners. You might be wondering how the nation's economic situation is affecting the market for naturalNatural Gas Exploration: A Landowners Guide to Financial Management Natural Gas Exploration

  13. Comparison of photosynthetic responses of Ashe juniper and live oak on the Edwards Plateau, Texas 

    E-Print Network [OSTI]

    Bendevis, Mira Arpe

    2009-06-02T23:59:59.000Z

    gas exchange and water relations at the leaf level of the two dominant tree species, Ashe juniper and live oak (Quercus virginiana P. Mill. Var. fusiformis), is important to assess the impact of juniper encroachment on the aquifer. Photosynthesis...

  14. Heat Exchanger With Internal Pin Elements

    DOE Patents [OSTI]

    Gerstmann, Joseph (Framingham, MA); Hannon, Charles L. (Arlington, MA)

    2004-01-13T23:59:59.000Z

    A heat exchanger/heater comprising a tubular member having a fluid inlet end, a fluid outlet end and plurality of pins secured to the interior wall of the tube. Various embodiments additionally comprise a blocking member disposed concentrically inside the pins, such as a core plug or a baffle array. Also disclosed is a vapor generator employing an internally pinned tube, and a fluid-heater/heat-exchanger utilizing an outer jacket tube and fluid-side baffle elements, as well as methods for heating a fluid using an internally pinned tube.

  15. Confronting Dilaton-exchange gravity with experiments

    E-Print Network [OSTI]

    H. V. Klapdor-Kleingrothaus; H. Päs; U. Sarkar

    2000-08-16T23:59:59.000Z

    We study the experimental constraints on theories, where the equivalence principle is violated by dilaton-exchange contributions to the usual graviton-exchange gravity. We point out that in this case it is not possible to have any CPT violation and hence there is no constraint from the CPT violating measurements in the $K-$system. The most stringent bound is obtained from the $K_L - K_S$ mass difference. In contrast, neither neutrino oscillation experiments nor neutrinoless double beta decay imply significant constraints.

  16. INFX GUIDE: DEPARTMENT OF ENERGY BILATERAL AGREEMENTS FOR COOPERATION IN THE FIELD OF RADIOACTIVE WASTE MANAGEMENT (INFX: INTERNATIONAL INFORMATION EXCHANGE)

    SciTech Connect (OSTI)

    Harman, K. M.; Lakey, L. T.; Leigh, I. W.; Jeffs, A. G.

    1985-07-01T23:59:59.000Z

    As the U. S. Department of Energy (DOE) and DOE contractors have increased the magnitude and scope of their cooperative activities with other nations in the nuclear fuel cycle and waste management field, a need has developed for ready sources of information concerning foreign waste management programs, DOE technology exchange policies, bilateral fuel cycle and waste management agreements and plans and activities to implement those agreements. The INFX (International InLormation E~change) Guide is one of a series of documents that have been prepared to provide that information. The INFX Guide has been compiled under the charter of PNL's International Support Office (IPSO) to maintain for DOE a center to collect, organize, evaluate and disseminate information on foreign and international radioactive waste management programs. Because the information in this document is constantly subject to change, the document is assembled in loose-leaf form to accommodate frequent updates.

  17. Welcome FUPWG- Natural Gas Overview

    Broader source: Energy.gov [DOE]

    Presentation—given at the Federal Utility Partnership Working Group (FUPWG) Fall 2008 meeting—provides an overview of natural gas, including emissions, compressed natural gas (CNG) vehicles, and landfill gas supplement for natural gas system.

  18. Condensing Heat Exchangers Optimize Steam Boilers

    E-Print Network [OSTI]

    Sullivan, B.; Sullivan, P. A.

    1983-01-01T23:59:59.000Z

    the flue gas from the p~oducts of combustion faom natural gas from 300 to the dew point of 129 results in an efficiency increase of 3%. Further cooling, resulting in condensa tion of water vapor, increases the rate of heat recovery dramatically and a...

  19. Natural gas leak mapper

    DOE Patents [OSTI]

    Reichardt, Thomas A. (Livermore, CA); Luong, Amy Khai (Dublin, CA); Kulp, Thomas J. (Livermore, CA); Devdas, Sanjay (Albany, CA)

    2008-05-20T23:59:59.000Z

    A system is described that is suitable for use in determining the location of leaks of gases having a background concentration. The system is a point-wise backscatter absorption gas measurement system that measures absorption and distance to each point of an image. The absorption measurement provides an indication of the total amount of a gas of interest, and the distance provides an estimate of the background concentration of gas. The distance is measured from the time-of-flight of laser pulse that is generated along with the absorption measurement light. The measurements are formated into an image of the presence of gas in excess of the background. Alternatively, an image of the scene is superimosed on the image of the gas to aid in locating leaks. By further modeling excess gas as a plume having a known concentration profile, the present system provides an estimate of the maximum concentration of the gas of interest.

  20. Cambodia-Lowering Emissions in Asia's Forests (LEAF) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainableCSL GasPermits Manual Jump to:(RECP) in Developing and

  1. Comparative analysis of compact heat exchangers for application as the intermediate heat exchanger for advanced nuclear reactors

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bartel, N.; Chen, M.; Utgikar, V. P.; Sun, X.; Kim, I. H.; Christensen, R.; Sabharwall, P.

    2015-07-01T23:59:59.000Z

    A comparative evaluation of alternative compact heat exchanger designs for use as the intermediate heat exchanger in advanced nuclear reactor systems is presented in this article. Candidate heat exchangers investigated included the Printed circuit heat exchanger (PCHE) and offset strip-fin heat exchanger (OSFHE). Both these heat exchangers offer high surface area to volume ratio (a measure of compactness [m2/m3]), high thermal effectiveness, and overall low pressure drop. Helium–helium heat exchanger designs for different heat exchanger types were developed for a 600 MW thermal advanced nuclear reactor. The wavy channel PCHE with a 15° pitch angle was found to offer optimummore »combination of heat transfer coefficient, compactness and pressure drop as compared to other alternatives. The principles of the comparative analysis presented here will be useful for heat exchanger evaluations in other applications as well.« less

  2. Ion exchange polymers for anion separations

    DOE Patents [OSTI]

    Jarvinen, G.D.; Marsh, S.F.; Bartsch, R.A.

    1997-09-23T23:59:59.000Z

    Anion exchange resins including at least two positively charged sites and a well-defined spacing between the positive sites are provided together with a process of removing anions or anionic metal complexes from aqueous solutions by use of such resins. The resins can be substituted poly(vinylpyridine) and substituted polystyrene.

  3. Ion exchange polymers for anion separations

    DOE Patents [OSTI]

    Jarvinen, Gordon D. (Los Alamos, NM); Marsh, S. Fredric (Los Alamos, NM); Bartsch, Richard A. (Lubbock, TX)

    1997-01-01T23:59:59.000Z

    Anion exchange resins including at least two positively charged sites and a ell-defined spacing between the positive sites are provided together with a process of removing anions or anionic metal complexes from aqueous solutions by use of such resins. The resins can be substituted poly(vinylpyridine) and substituted polystyrene.

  4. DYNAMIC MODELING PROTON EXCHANGE MEMBRANE FUEL CELL

    E-Print Network [OSTI]

    Mease, Kenneth D.

    DYNAMIC MODELING PROTON EXCHANGE MEMBRANE FUEL CELL OVERVIEW Current/Completed Plug Power to garner SCAQMD funding for fuel cell testing GenCore system is sensitive to diluents · As built design stream to compensate for removal of EGR · Functionality of the modified GenCore Fuel Cell system

  5. Resource Exchange in the Rhizosphere: Molecular

    E-Print Network [OSTI]

    Gage, Daniel J.

    and Cell Biology, University of Connecticut, Storrs, Connecticut 06269; email: daniel.gage@uconn.edu Annu commodities exchange, where organic carbon flux from roots fuels decomposers that, in turn, can make nutrients--surrounded, from the beginning, by microbes and a soil faunal community. Today, plant roots pack or pepper

  6. Thermal Analysis of LANL Ion Exchange Column

    SciTech Connect (OSTI)

    Laurinat, J.E.

    1999-06-16T23:59:59.000Z

    This document reports results from an ion exchange column heat transfer analysis requested by Los Alamos National Laboratory (LANL). The object of the analysis is to demonstrate that the decay heat from the Pu-238 will not cause resin bed temperatures to increase to a level where the resin significantly degrades.

  7. UNIVERSITYOFIOANNIN ESN IOANNINA INTERNATIONAL EXCHANGE ERAS

    E-Print Network [OSTI]

    Dimakopoulos, Vassilios

    1 GUIDE FOR BEGINNERS UNIVERSITYOFIOANNIN A · ESN IOANNINA · INTERNATIONAL EXCHANGE ERAS M calendar City of Ioannina Survivor's guide Arriving in Ioannina A brief history Brief history of Ioannina will be first time visitors to Greece, the city of Ioannina and the University.This guide will help you navigate

  8. 8 Ecosystem Exchange 8.3 Introduction

    E-Print Network [OSTI]

    of momentum, sensible heat, H, latent heat, E, and carbon dioxide, Fc, and the energy budget. 8.4 Storage and carbon dioxide are described. Patterns of these exchanges are explained in relation to appropriate variables and controlling factors. The storage of mass and energy is presented first, followed by the fluxes

  9. Adaptive systems for foreign exchange trading

    E-Print Network [OSTI]

    Fernandez, Thomas

    - cal analysis. Technical analysis attempts to predict markets by identifying patterns in the price;FinancialMarkets Jones CM (2001 & 2002). Much of it has concen- trated on high frequency (intraday) trading exchange markets. Professor Michael Dempster and Graham Bates, both of the Centre for Financial Research

  10. SURVEY Real Analysis Exchange Vol. ??(?), ????, pp. 157

    E-Print Network [OSTI]

    Edgar, Gerald

    SURVEY Real Analysis Exchange Vol. ??(?), ????, pp. 1­57 G. A. Edgar, Department of Mathematics, The Ohio State University, Columbus, Ohio 43210, USA. email: edgar@math.ohio-state.edu TRANSSERIES: Hardy field, ordered field, differential field, log-exp series, ´Ecalle 1 #12;2 G. A. Edgar 4 Example

  11. STUDIES OF X-RAY PRODUCTION FOLLOWING CHARGE EXCHANGE RECOMBINATION BETWEEN HIGHLY CHARGED IONS AND NEUTRAL ATOMS AND MOLECULES

    SciTech Connect (OSTI)

    Brown, G V; Beiersdorfer, P; Chen, H; Clementson, J; Frankel, M; Gu, M F; Kelley, R L; Kilbourne, C A; Porter, F S; Thorn, D B; Wargelin, B J

    2008-08-28T23:59:59.000Z

    We have used microcalorimeters built by the NASA/Goddard Space Flight Center and the Lawrence Livermore National Laboratory Electron Beam Ion Trap to measure X-ray emission produced by charge exchange reactions between highly charged ions colliding with neutral helium, hydrogen, and nitrogen gas. Our measurements show the spectral dependence on neutral species and also show the distinct differences between spectra produced by charge exchange reactions and those produced by direct impact excitation. These results are part of an ongoing experimental investigation at the LLNL EBIT facility of charge exchange spectral signatures and can be used to interpret X-ray spectra produced by a variety of laboratory and celestial sources including cometary and planetary atmospheres, the Earth's magnetosheath, the heliosphere, and tokamaks.

  12. The interaction of chemicals and red light on growth of etiolated bean leaf disks

    E-Print Network [OSTI]

    Edwards, John Lee

    1960-01-01T23:59:59.000Z

    with the basal solution. From the second flask 5 mls. (0. 15 microgram of ade- nine per ml. ) were removed and placed i. n Petri dishes containing two Whatman No. 1 filter papers. The dishes were then removed to the dark- room where the bean plants ware... were then separated and opened. The leaf disk was removed from the basal area of the leaf with a sharpened, sterilised cork borer, 5 mm in diameter. The disk was placed in the Petri dish with the lower epidermis upward and with the main lateral vein...

  13. Characterization of leaf resistance to water loss in two clones of eastern cottonwood (Populus deltoides Bartr.) with respect to light intensity, leaf water potential, and drought

    E-Print Network [OSTI]

    Dougherty, Phillip Merle

    1973-01-01T23:59:59.000Z

    and S7C1) (aj ove- cycles 1 and 2 where PAR is & 115nE m s and (b) for cycles 3 and 4 when PAR was & 115 nE m s 39 40 FIGURE PAGE Relationship of average tree leaf resistance with time since sunup at high SW (& 30%) for clones S708 and S7015 (a...) in cycles 3 and 4 and (b) cyles 1 and 2, when PAR was & 115 nE m 2 s 1 . . 42 Relationship of average tree leaf resistance with time since sunup at low SW (& 20%) for clone S7C8 and S7015 (a) in cycles 3 and 4 and (b) cycles 1 and 2 when PAR was & 115 n...

  14. Carbon sequestration in natural gas reservoirs: Enhanced gas recovery and natural gas storage

    E-Print Network [OSTI]

    Oldenburg, Curtis M.

    2003-01-01T23:59:59.000Z

    gas reservoirs for carbon sequestration and enhanced gasproduction and carbon sequestration, Society of Petroleumfeasibiilty of carbon sequestration with enhanced gas

  15. Triple loop heat exchanger for an absorption refrigeration system

    DOE Patents [OSTI]

    Reimann, Robert C. (Lafayette, NY)

    1984-01-01T23:59:59.000Z

    A triple loop heat exchanger for an absorption refrigeration system is disclosed. The triple loop heat exchanger comprises portions of a strong solution line for conducting relatively hot, strong solution from a generator to a solution heat exchanger of the absorption refrigeration system, conduit means for conducting relatively cool, weak solution from the solution heat exchanger to the generator, and a bypass system for conducting strong solution from the generator around the strong solution line and around the solution heat exchanger to an absorber of the refrigeration system when strong solution builds up in the generator to an undesirable level. The strong solution line and the conduit means are in heat exchange relationship with each other in the triple loop heat exchanger so that, during normal operation of the refrigeration system, heat is exchanged between the relatively hot, strong solution flowing through the strong solution line and the relatively cool, weak solution flowing through the conduit means. Also, the strong solution line and the bypass system are in heat exchange relationship in the triple loop heat exchanger so that if the normal flow path of relatively hot, strong solution flowing from the generator to an absorber is blocked, then this relatively, hot strong solution which will then be flowing through the bypass system in the triple loop heat exchanger, is brought into heat exchange relationship with any strong solution which may have solidified in the strong solution line in the triple loop heat exchanger to thereby aid in desolidifying any such solidified strong solution.

  16. Initial Assessment of Electron and X-Ray Production and Charge Exchange in the NDCX-II Accelerator

    SciTech Connect (OSTI)

    COHEN, R.H.

    2010-02-18T23:59:59.000Z

    The purpose of this note is to provide initial assessments of some atomic physics effects for the accelerator section of NDCX-II. There are several effects we address: the production of electrons associated with loss of beam ions to the walls, the production of electrons associated with ionization of background gas, the possibly resultant production of X-rays when these electrons hit bounding surfaces, and charge exchange of beam ions on background gas. The results presented here are based on a number of caveats that will be stated below, which we will attempt to remove in the near future.

  17. Diurnal and seasonal variation in the carbon isotope composition of leaf dark-respired CO2 in velvet mesquite

    E-Print Network [OSTI]

    Williams, David G.

    Diurnal and seasonal variation in the carbon isotope composition of leaf dark-respired CO2 82071, USA ABSTRACT We evaluated diurnal and seasonal patterns of carbon isotope composition of leaf- ing that progressive 13 C enrichment of the CO2 evolved by darkened leaves during the daytime mainly

  18. Leaf Pick Up Guide Lines This program is for those who have no other means by which to dispose of

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Leaf Pick Up Guide Lines This program is for those who have no other means by which to dispose of the leaves that will be gathered on the day of the Fall Clean Up program. This is for leaves only and restrictions apply. Please review the following list to see if leaf pick up is appropriate for you. No less

  19. Leaf epicuticular wax ultrastructure and trichome presence on Russian wheat aphid (Diuraphis noxia) resistant and susceptible leaves

    E-Print Network [OSTI]

    Leaf epicuticular wax ultrastructure and trichome presence on Russian wheat aphid (Diuraphis noxia wax ultrastructure and leaf trichomes were examined on two Russian wheat aphid-susceptible wheat. Comparison of the scanning electron micrographs showed that the epicuticular wax structure was similar

  20. Evidence for water use efficiency as an important factor in determining the dD values of tree leaf waxes

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    leaf waxes Juzhi Hou, William J. D'Andrea, Dana MacDonald, Yongsong Huang * Department of Geological waxes can provide useful information about past climate change. However, factors con- trolling dD values of higher plant leaf waxes (dDwax) are poorly understood. Here we show that dDwax values are negatively

  1. Optimal photosynthetic use of light by tropical tree crowns achieved by adjustment of individual leaf angles and nitrogen content

    E-Print Network [OSTI]

    Lechowicz, Martin J.

    Smithsonian Tropical Research Institute, Roosevelt Avenue, Tupper Building ­ 401, Balboa, Anco´n, Panama´, Republic of Panama´ Received: 8 September 2008 Returned for revision: 8 October 2008 Accepted: 25 November per area, tropical trees, radiation use efficiency, scaling, leaf angle, canopy architecture, big leaf

  2. Phytologia (November 2013) 95(4)288 Leaf essential oils of Juniperus in central and southern Iran

    E-Print Network [OSTI]

    Adams, Robert P.

    Phytologia (November 2013) 95(4)288 Leaf essential oils of Juniperus in central and southern Iran Tehran 14115-154, Iran. ABSTRACT Leaf essential oils from Juniperus from southern Iran were analyzed oils from southern Iran were mainly in two groups: high cedrol (cf. J. excelsa, J. polycarpos and J

  3. Using Mobile Applications to Generate Customer Demand Peer Exchange...

    Energy Savers [EERE]

    Using Mobile Applications to Generate Customer Demand Peer Exchange Call Using Mobile Applications to Generate Customer Demand Peer Exchange Call March 12, 2015 3:00PM to 4:3...

  4. Normalizing Weather Data to Calculate Energy Savings Peer Exchange...

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

    Normalizing Weather Data to Calculate Energy Savings Peer Exchange Call Normalizing Weather Data to Calculate Energy Savings Peer Exchange Call February 26, 2015 3:00PM to 4:3...

  5. Networking Call for Residential Network Members Peer Exchange...

    Energy Savers [EERE]

    Networking Call for Residential Network Members Peer Exchange Call Networking Call for Residential Network Members Peer Exchange Call March 12, 2015 12:30PM to 2:0...

  6. alkali ion exchange: Topics by E-print Network

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

    many biological processes. In ion channels3 Guidoni, Leonardo 2 Spin-Exchange Optical Pumping with Alkali-Metal Vapors Physics Websites Summary: Spin-Exchange Optical Pumping with...

  7. Fouling of HVAC fin and tube heat exchangers

    E-Print Network [OSTI]

    Siegel, Jeffrey; Carey, Van P.

    2001-01-01T23:59:59.000Z

    air ? air ? part ? part FPI HVAC REFERENCES Anonymous, 1987,LBNL-47668 Fouling of HVAC Fin and Tube Heat ExchangersCIEE SPONSOR. FOULING OF HVAC FIN AND TUBE HEAT EXCHANGERS

  8. Gas shielding apparatus

    DOE Patents [OSTI]

    Brandt, D.

    1984-06-05T23:59:59.000Z

    An apparatus for preventing oxidation by uniformly distributing inert shielding gas over the weld area of workpieces such as pipes being welded together. The apparatus comprises a chamber and a gas introduction element. The chamber has an annular top wall, an annular bottom wall, an inner side wall and an outer side wall connecting the top and bottom walls. One side wall is a screen and the other has a portion defining an orifice. The gas introduction element has a portion which encloses the orifice and can be one or more pipes. The gas introduction element is in fluid communication with the chamber and introduces inert shielding gas into the chamber. The inert gas leaves the chamber through the screen side wall and is dispersed evenly over the weld area.

  9. Liquid Crystal Polarimetry for Metastability Exchange Optical Pumping of 3He

    E-Print Network [OSTI]

    James D. Maxwell; Charles S. Epstein; Richard G. Milner

    2014-07-21T23:59:59.000Z

    We detail the design and operation of a compact, discharge light polarimeter for metastability exchange optical pumping of 3He gas near 1 torr under a low magnetic field. The nuclear polarization of 3He can be discerned from its electron polarization, measured via the circular polarization of 668 nm discharge light from an RF excitation. This apparatus measures the circular polarization of this very dim discharge light using a nematic liquid crystal wave retarder (LCR) and a high-gain, transimpedance amplified Si photodiode. We outline corrections required in such a measurement, and discuss contributions to its systematic error.

  10. Valve for gas centrifuges

    DOE Patents [OSTI]

    Hahs, Charles A. (Oak Ridge, TN); Burbage, Charles H. (Oak Ridge, TN)

    1984-01-01T23:59:59.000Z

    The invention is a pneumatically operated valve assembly for simultaneously (1) closing gas-transfer lines connected to a gas centrifuge or the like and (2) establishing a recycle path between two of the lines so closed. The valve assembly is especially designed to be compact, fast-acting, reliable, and comparatively inexpensive. It provides large reductions in capital costs for gas-centrifuge cascades.

  11. Thermodynamics of Chaplygin gas

    E-Print Network [OSTI]

    Yun Soo Myung

    2011-05-11T23:59:59.000Z

    We clarify thermodynamics of the Chaplygin gas by introducing the integrability condition. All thermal quantities are derived as functions of either volume or temperature. Importantly, we find a new general equation of state, describing the Chaplygin gas completely. We confirm that the Chaplygin gas could show a unified picture of dark matter and energy which cools down through the universe expansion without any critical point (phase transition).

  12. Heat exchanger containing a component capable of discontinuous movement

    DOE Patents [OSTI]

    Wilson, David Gordon

    2001-04-17T23:59:59.000Z

    Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while in a stationary position. Both rotary and modular heat exchangers are described. Also described are methods for transferring heat between a hot and cold fluid using the discontinuous movement of matrices.

  13. Heat exchanger containing a component capable of discontinuous movement

    DOE Patents [OSTI]

    Wilson, David Gordon (Winchester, MA)

    2002-01-01T23:59:59.000Z

    Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while in a stationary position. Both rotary and modular heat exchangers are described. Also described are methods for transferring heat between a hot and cold fluid using the discontinuous movement of matrices.

  14. Porous solid ion exchange wafer for immobilizing biomolecules

    DOE Patents [OSTI]

    Arora, Michelle B. (Woodridge, IL); Hestekin, Jamie A. (Morton Grove, IL); Lin, YuPo J. (Naperville, IL); St. Martin, Edward J. (Libertyville, IL); Snyder, Seth W. (Lincolnwood, IL)

    2007-12-11T23:59:59.000Z

    A porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer. Also disclosed is a porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer containing a biomolecule with a tag. A separate bioreactor is also disclosed incorporating the wafer described above.

  15. QUALITY ASSURANCE EXCHANGE July 2005 Volume 1 Issue 1

    Broader source: Energy.gov [DOE]

    QUALITY ASSURANCE EXCHANGE July 2005 Volume 1 Issue 1 US Department of Energy, Office of Quality Assurance Programs (EH-31)

  16. Quality Assurance Exchange January 2007, Volume 3 Issue 1

    Broader source: Energy.gov [DOE]

    Quality Assurance Exchange January 2007, Volume 3 Issue 1 U.S. Department of Energy Office of Corporate Safety Analysis

  17. Safe Exchange Planner Tuomas Sandholm and Vincent Ferrandon

    E-Print Network [OSTI]

    Gordon, Geoffrey J.

    , the technique may also facilitate illegal trades of drugs, arms, porn, etc., where enforcement of the exchange

  18. Quality Assurance Exchange Setpebmer 2007, Volume 3 Issue 3

    Broader source: Energy.gov [DOE]

    Quality Assurance Exchange Setpebmer 2007, Volume 3 Issue 3 U.S. Department of Energy Office of Corporate Safety Analysis

  19. Hierarchical Modeling for Population-Based Heat Exchanger Design

    E-Print Network [OSTI]

    Geb, David

    2013-01-01T23:59:59.000Z

    transfer in tube banks in crossflow. [60] Zukauskas, A. ,law based optimisation of crossflow plate-fin heat exchanger

  20. Heat exchanger containing a component capable of discontinuous movement

    DOE Patents [OSTI]

    Wilson, David G. (Winchester, MA)

    1993-01-01T23:59:59.000Z

    Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while in a stationary position. Both rotary and modular heat exchangers are described. Also described are methods for transferring heat between a hot and cold fluid using the discontinuous movement of matrices.

  1. Quality Assurance Exchange August 2007, Volume 3 Issue 2

    Broader source: Energy.gov [DOE]

    Quality Assurance Exchange August 2007, Volume 3 Issue 2 U.S. Department of Energy Office of Corporate Safety Analysis

  2. Home Safety: Radon Gas 

    E-Print Network [OSTI]

    Shaw, Bryan W.; Denny, Monica L.

    1999-11-12T23:59:59.000Z

    Every home should be tested for radon, an invisible, odorless, radioactive gas that occurs naturally. This publication explains the health risks, testing methods, and mitigation and reduction techniques....

  3. String Gas Baryogenesis

    E-Print Network [OSTI]

    G. L. Alberghi

    2010-02-19T23:59:59.000Z

    We describe a possible realization of the spontaneous baryogenesis mechanism in the context of extra-dimensional string cosmology and specifically in the string gas scenario.

  4. Natural gas annual 1997

    SciTech Connect (OSTI)

    NONE

    1998-10-01T23:59:59.000Z

    The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1997 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1993 to 1997 for each Census Division and each State. Annual historical data are shown at the national level. 27 figs., 109 tabs.

  5. Home Safety: Radon Gas

    E-Print Network [OSTI]

    Shaw, Bryan W.; Denny, Monica L.

    1999-11-12T23:59:59.000Z

    Every home should be tested for radon, an invisible, odorless, radioactive gas that occurs naturally. This publication explains the health risks, testing methods, and mitigation and reduction techniques....

  6. Liquefied Natural Gas (Iowa)

    Broader source: Energy.gov [DOE]

    This document adopts the standards promulgated by the National Fire Protection Association as rules for the transportation, storage, handling, and use of liquefied natural gas. The NFPA standards...

  7. Oil and Gas Outlook

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

    Gas Outlook For Independent Petroleum Association of America November 13, 2014 | Palm Beach, FL By Adam Sieminski, Administrator U.S. Energy Information Administration Recent...

  8. Oil and Gas (Indiana)

    Broader source: Energy.gov [DOE]

    This division of the Indiana Department of Natural Resources provides information on the regulation of oil and gas exploration, wells and well spacings, drilling, plugging and abandonment, and...

  9. NETL: Oil & Gas

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

    that address the unique nature and challenging locations of many of our remaining oil and natural gas accumulations. The National Energy Technology Laboratory's (NETL)...

  10. Reversible Acid Gas Capture

    ScienceCinema (OSTI)

    Dave Heldebrant

    2012-12-31T23:59:59.000Z

    Pacific Northwest National Laboratory scientist David Heldebrant demonstrates how a new process called reversible acid gas capture works to pull carbon dioxide out of power plant emissions.

  11. Natural Gas Rules (Louisiana)

    Broader source: Energy.gov [DOE]

    The Louisiana Department of Natural Resources administers the rules that govern natural gas exploration and extraction in the state. DNR works with the Louisiana Department of Environmental...

  12. Gas venting system

    DOE Patents [OSTI]

    Khan, Amjad; Dreier, Ken Wayne; Moulthrop, Lawrence Clinton; White, Erik James

    2010-06-29T23:59:59.000Z

    A system to vent a moist gas stream is disclosed. The system includes an enclosure and an electrochemical cell disposed within the enclosure, the electrochemical cell productive of the moist gas stream. A first vent is in fluid communication with the electrochemical cell for venting the moist gas stream to an exterior of the enclosure, and a second vent is in fluid communication with an interior of the enclosure and in thermal communication with the first vent for discharging heated air to the exterior of the enclosure. At least a portion of the discharging heated air is for preventing freezing of the moist gas stream within the first vent.

  13. Gas mixing in the wall layer of a CFB boiler

    SciTech Connect (OSTI)

    Sterneus, J.; Johnsson, F. [Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Energy Conversion

    1997-12-31T23:59:59.000Z

    Tracer-gas measurements were carried out in the transport zone of a 12 MW CFB boiler with special emphasis on the wall-layer flow. Helium (He) was used as tracer gas and a mass spectrometer was used to determine the He-concentrations. The primary gas velocity, U{sub 0}, was 1.2, 2.6 and 4.3 m/s (no secondary air) and the bed material was silica sand with an average particle diameter of 0.32 mm. Tracer gas was injected at different distances from one of the furnace walls and sampled above and below the injection level. In the wall layer, tracer-gas concentrations were detected above (C{sub above}) as well as below (C{sub below}) the injection height for all operating conditions, i.e., the gas flows both up and down from the injection point. The data show that the net flow of tracer gas in the wall layer depends on the operating conditions, and the concentration ratio of the down- and up-flowing gas, {psi} = C{sub below}/C{sub above}, decreases with increased gas velocity ({psi} > 1 for U{sub 0} = 1.2 m/s, {psi} {approx} 1 for U{sub 0} = 2.6 m/s and {psi} < 1 for U{sub 0} = 4.3 m/s). There exists a gas exchange between the core region and the wall-layer. A plug flow model applied to the core region gives a radial dispersion coefficient, D{sub r}, in the range of 0.015--0.025 m{sup 2}/s which is higher than the D{sub r} values reported in literature which are below 0.01 m{sup 2}/x. However, the latter values were obtained in tall and narrow risers.

  14. Security Trade Control Guidelines for Academic Exchange Agreements

    E-Print Network [OSTI]

    Takada, Shoji

    Security Trade Control Guidelines for Academic Exchange Agreements at Kyoto University Committee for Security Trade Control December 28, 2012 Recent years have seen an increasing number of academic exchange globalization. Under the Foreign Exchange and Foreign Trade Act (FEFTA), which was put into effect in April 2010

  15. Exports and exchange rate : a firm-level investigation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Exports and exchange rate : a firm-level investigation N° 2008-02 Février 2008 Sarah Guillou OFCE-DRIC hal-00973044,version1-3Apr2014 #12;Exports and exchange rate: a firm-level investigation Sarah Guillou February 2008 Abstract This paper investigates the relation between export behaviour and the exchange rate

  16. Investigation of Transient Phenomena of Proton Exchange Membrane Fuel Cells

    E-Print Network [OSTI]

    Victoria, University of

    Investigation of Transient Phenomena of Proton Exchange Membrane Fuel Cells by Roongrojana of Proton Exchange Membrane Fuel Cells by Roongrojana Songprakorp BSc, Prince of Songkhla University to the modeling and under- standing of the dynamic behavior of proton exchange membrane fuel cells (PEMFCs

  17. Storage Exchange: A Global Trading Platform for Storage Services

    E-Print Network [OSTI]

    Melbourne, University of

    Storage Exchange: A Global Trading Platform for Storage Services Martin Placek and Rajkumar Buyya,raj}@csse.unimelb.edu.au Abstract. The Storage Exchange (SX) is a new platform allowing stor- age to be treated as a tradeable resource. Organisations with varying storage requirements can use the SX platform to trade and exchange

  18. Heat exchanger support apparatus in a fluidized bed

    DOE Patents [OSTI]

    Lawton, Carl W. (West Hartford, CT)

    1982-01-01T23:59:59.000Z

    A heat exchanger is mounted in the upper portion of a fluidized combusting bed for the control of the temperature of the bed. A support, made up of tubes, is extended from the perforated plate of the fluidized bed up to the heat exchanger. The tubular support framework for the heat exchanger has liquid circulated therethrough to prevent deterioration of the support.

  19. The effect of various cropping systems upon organic matter, total nitrogen, cation exchange capacity, exchangeable cations, conductivity and reaction

    E-Print Network [OSTI]

    Mannan, Mohammad Abdul

    1958-01-01T23:59:59.000Z

    &IBRARY A 4 N COLLEGE OF TEXAS THE EFFECT OF VARIOUS CROPPING SYSTEMS UPON ORGANIC MATTER, TOTAL NITROGEN, CATION EXCHANGE CAPACITY, EXCHANGEABLE CATIONS, CONDUCTIVITY AND REACTION. A Thesis By MOHAMMAD ABDUL MANNAN Submitted...

  20. 752 MRS BULLETIN VOLUME 33 AUGUST 2008 www.mrs.org/bulletin Recent experiments have revealed that the wax on the lotus leaf surface, by itself,

    E-Print Network [OSTI]

    texture" (that is, a multivalued surface topography) on the surface of the lotus leaf. We exploit revealed that the wax on the lotus leaf surface, by itself, is weakly hydrophilic, even though the lotus leaf is known to be superhydrophobic. Conventional understanding suggests that a surface of such waxy

  1. 47 Natural Gas Market Trends NATURAL GAS MARKET TRENDS

    E-Print Network [OSTI]

    47 Natural Gas Market Trends Chapter 5 NATURAL GAS MARKET TRENDS INTRODUCTION Natural gas discusses current natural gas market conditions in California and the rest of North America, followed on the outlook for demand, supply, and price of natural gas for the forecasted 20-year horizon. It also addresses

  2. Effects of ontogeny and soil nutrient supply on production, allocation, and leaf area efficiency in

    E-Print Network [OSTI]

    Martin, Timothy

    and soil nutrient supply on aboveground biomass accumulation, allocation, and stemwood growth efficiencyEffects of ontogeny and soil nutrient supply on production, allocation, and leaf area efficiency control). Aboveground biomass growth responses to the combined fertilizer and weed control treatments (FW

  3. Reactive uptake of ozone at simulated leaf surfaces: implications for "non-stomatal" ozone flux 

    E-Print Network [OSTI]

    Cape, J Neil; Hamilton, Richard P; Heal, Mathew R

    2009-01-01T23:59:59.000Z

    The reaction of ozone (O3) with ?-pinene has been studied as a function of temperature and relative humidity and in the presence of wax surfaces that simulate a leaf surface. The objective was to determine whether the presence of a wax surface...

  4. Ontogenetic changes in leaf development and photosyn-thesis of Prunus serotina seedlings

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    serotina Ehrh.) is an important commercial hardwood species in the northeastern United States. The species physiological pro- cesses in trees, especially those with indeterminate growth. Net photosynthetic rate is a process that influences survival or death of young seedlings. Relationships between plant age, leaf age

  5. Leaf-litter breakdown in pasture and deciduous woodland streams: a comparison among three European

    E-Print Network [OSTI]

    Tiegs, Scott

    , Wodonga, Victoria, 3689, Australia. 2 Present address: Department of Biological Sciences, OaklandLeaf-litter breakdown in pasture and deciduous woodland streams: a comparison among three European regions SALLY HLADYZ*, 1 , SCOTT D. TIEGS, , 2 , MARK O. GESSNER, , PAUL S. GILLER*, GETA RI^S¸ NOVEANU

  6. Driving and Charging Behavior of Nissan Leafs in The EV Project with Access to Workplace Charging

    SciTech Connect (OSTI)

    Don Scoffield; Shawn Salisbury; John Smart

    2014-11-01T23:59:59.000Z

    This paper documents findings from analysis of data collected from Nissan Leafs enrolled in The EV Project who parked and charged at workplaces with EV charging equipment. It will be published as a white paper on INL's website, accessible by the general public.

  7. Workplace Charging Behavior of Nissan Leafs in The EV Project at Six Work Sites

    SciTech Connect (OSTI)

    David Rohrbaugh; John Smart

    2014-11-01T23:59:59.000Z

    This paper documents findings from analysis of data collected from Nissan Leafs enrolled in The EV Project who parked and charged at six workplaces with EV charging equipment. It will be published as a white paper on INL's website, accessible by the general public.

  8. Noise Localization via Acoustic Emission Monitoring on a Rolling Leaf Bascule Bridge

    E-Print Network [OSTI]

    - ing and closing of a large, double-leaf rolling-lift bascule bridge. The data were analyzed using paint was not removed. Our testing method was consistent with that described in the project proposal eddy- current displacement sensors and two Schaevitz Accustar II electronic clinometers were affixed

  9. How many electric miles do Nissan Leafs and Chevrolet Volts in The EV Project travel?

    SciTech Connect (OSTI)

    John Smart

    2014-05-01T23:59:59.000Z

    This paper presents travel statistics and metrics describing the driving behavior of Nissan Leaf and Chevrolet Volt drivers in the EV Project. It specifically quantifies the distance each group of vehicles drives each month. This paper will be published to INL's external website and will be accessible by the general public.

  10. The evolution and functional signi cance of leaf shape in the angiosperms

    E-Print Network [OSTI]

    Boyce, C. Kevin

    . These include: thermoregulation of leaves especially in arid and hot environments, hydraulic constraints that generate the diversity in extant systems, and consider the evidence for each the above hypotheses we provide an overview of the evolutionary history of leaf shape and then examine genetic

  11. Modelling CO2 diffusion and assimilation in a leaf with axisymmetric finite volumes

    E-Print Network [OSTI]

    Herbin, Raphaèle

    Modelling CO2 diffusion and assimilation in a leaf with axisymmetric finite volumes Emily Gallouët. This paper deals with the numerical simulation of the diffusion and assimilation by photosynthesis of CO2 medium, from experimental measurements of the pointwise value of internal CO2 concentration, giving some

  12. by raising CO2 levels around the leaf3 manner conceptually similar to adding a

    E-Print Network [OSTI]

    Collins, James J.

    by raising CO2 levels around the leaf3 in a manner conceptually similar to adding a CCM photo- synthetic CO2 fixation. CCMs have evolved independently in cyanobacteria, microalgae and some a series of membrane- based pumps for CO2 and bicarbonate (HCO3 - ), and special microcompartments called

  13. Leaf scorch is commonly seen on a variety of trees in Indiana during

    E-Print Network [OSTI]

    of unfavorable weather conditions such as drought, high temperature, and hot, dry winds. Newly planted trees evaporates from the leaf surface because of sun and wind during hot, dry weather. If the water supply, especially on the sunward and windward sides of the tree. Where hot drying winds occur for several days

  14. Phytologia (April 2010) 92(1) 31 GEOGRAPHIC VARIATION IN THE LEAF ESSENTIAL OILS

    E-Print Network [OSTI]

    Adams, Robert P.

    CEDRUS WEBB. & BERTHOL. FROM MADEIRA AND THE CANARY ISLANDS. Robert P. Adams Biology Department, Baylor and Evolution Research Group (IPNA-CSIC), 38206 La Laguna, Tenerife, Canary Islands, Spain Susana S. Fontinha, Tenerife, Canary Islands, Spain ABSTRACT The volatile leaf oils of J. cedrus from Madeira, Gran Canaria, La

  15. LEAF ANATOMY OF ORCUTTIEAE (POACEAE: CHLORIDOIDEAE): MORE EVIDENCE OF C4 PHOTOSYNTHESIS WITHOUT KRANZ ANATOMY

    E-Print Network [OSTI]

    Pockman, William T.

    LEAF ANATOMY OF ORCUTTIEAE (POACEAE: CHLORIDOIDEAE): MORE EVIDENCE OF C4 PHOTOSYNTHESIS WITHOUT, University of New Mexico, Albuquerque, NM 87131 ABSTRACT C4 photosynthesis without Kranz anatomy (single-cell C4 photosynthesis) occurs in only 0.003% of known species of C4 flowering plants. To add insight

  16. Aortic Valve Turning Over a New Leaf(let) in Endothelial Phenotypic Heterogeneity

    E-Print Network [OSTI]

    Simmons, Craig A.

    Aortic Valve Turning Over a New Leaf(let) in Endothelial Phenotypic Heterogeneity Peter F. Davies, Anthony G. Passerini, Craig A. Simmons A ortic valve diseases are debilitating cardiovascular disorders the longevity of replacement valves and to improve tissue engineered substitutes,1 the underlying mech- anisms

  17. Elm leaf beetle performance on ozone-fumigated elm. Forest Service research paper (Final)

    SciTech Connect (OSTI)

    Barger, J.H.; Hall, R.W.; Townsend, A.M.

    1992-01-01T23:59:59.000Z

    Leaves (1986) from elm hybrids ('Pioneer', 'Homestead', '970') previously fumigated in open-top chambers with ozone or with charcoal-filtered air (CFA) were evaluated for water and nitrogen content or were fed to adult elm leaf beetles (ELB), Xanthogaleruca = (Pyrrhalta) luteola (Muller), to determine host suitability for beetle fecundity and survivorship. ELB females fed ozone-fumigated leaves laid significantly fewer eggs than females fed CFA-fumigated leaves. Leaf nitrogen or water content was unaffected. Hybrid '970' (1988) was fumigated with CFA or with ozone concentrations to determine effects on ELB fecundity, leaf consumption, and survivorship. Significantly fewer eggs were laid at the higher concentration of ozone. Because higher levels of ozone are found in urban areas and because municipalities often replace American elms, Ulmus americana L., with Dutch elm disease-resistant elm hybrids that are susceptible to ELB defoliation, it is important to explore the relationships between ozone sensitivity of elm and susceptibility to ELB herbivory before recommending replacement use of these elms to municipal arborists. The study was conducted to determine whether ozone pollution influences host quality of elm for ELB and how ELB fecundity, leaf consumption rate, and survivorship are affected.

  18. What kind of charging infrastructure do Nissan Leaf drivers in The EV Project use?

    SciTech Connect (OSTI)

    Shawn Salisbury

    2014-09-01T23:59:59.000Z

    This document will describe the charging behavior of Nissan Leaf battery electric vehicles that were enrolled in the EV Project. It will include aggregated data from several thousand vehicles regarding time-of-day, power level, and location of charging and driving events. This document is a white paper that will be published on the INL AVTA website.

  19. Effects of water deficit on leaf growth and initiation in fast-growing tree species

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to be particularly sensi- tive to water shortage (Pereira et al., 1986). These researchers have shown that biomass. In the longer term, a decline in biomass production under water shortage will result from reduced assimilation attributed the decreased foliage area observed with water shortage to de- creased leaf number. Our

  20. Mycosphaerellaceae and Teratosphaeriaceae associated with Eucalyptus leaf diseases and stem cankers in Uruguay

    E-Print Network [OSTI]

    Blanchette, Robert A.

    in Uruguay By C. A. Pe´rez1,2,5 , M. J. Wingfield3 , N. A. Altier4 and R. A. Blanchette1 1 Department´, Uruguay; 3 Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, Uruguay; 5 E-mail: caperez@fagro.edu.uy (for correspondence) Summary Mycosphaerella leaf diseases

  1. Using Leaf Compost Roy L. Flannery, Specialist in Soils, Emeritus and

    E-Print Network [OSTI]

    Rainforth, Emma C.

    Using Leaf Compost Roy L. Flannery, Specialist in Soils, Emeritus and Franklin Flower, Specialist in Environmental Science, Emeritus Composting involves primarily the microbial decomposition of organic matter. Compost - the end product - is a dark, friable, partially decomposed substance similar to natural organic

  2. How to safely compost Cameraria ohridella-infested horse chestnut leaf litter on private compost heaps

    E-Print Network [OSTI]

    Richner, Heinz

    How to safely compost Cameraria ohridella-infested horse chestnut leaf litter on private compost the deposition of pest-infested litter on private compost heaps was dissuaded because of the risk of leafminer emergence in the following spring. Thus, the aim of this study was to test safe ways to compost pest

  3. Optimizing spectral indices and chemometric analysis of leaf chemical properties using radiative transfer modeling

    E-Print Network [OSTI]

    Gitelson, Anatoly

    Optimizing spectral indices and chemometric analysis of leaf chemical properties using radiative for Sciences, 260 Panama Street, Stanford, CA 94305, USA d Center for Advanced Land Management Information squares regression We used synthetic reflectance spectra generated by a radiative transfer model, PROSPECT

  4. Optimizing spectral indices and chemometric analysis of leaf chemical properties using radiative transfer modeling

    E-Print Network [OSTI]

    Gitelson, Anatoly

    Optimizing spectral indices and chemometric analysis of leaf chemical properties using radiative for Sciences, 260 Panama Street, Stanford, CA 94305, USA d Center for Advanced Land Management Information regression We used synthetic reflectance spectra generated by a radiative transfer model, PROSPECT-5

  5. Effect of snails (Elimia clavaeformis) on phosphorus cycling in stream periphyton and leaf detritus communities

    SciTech Connect (OSTI)

    Jay, E.A. [North Carolina Univ., Chapel Hill, NC (United States)

    1993-10-01T23:59:59.000Z

    In this study, the author examined the effect of grazing on phosphorus cycling in stream periphyton and leaf detritus communities using the snail Elimia clavaeformis. Phosphorus cycling fluxes and turnover rates were measured in a laboratory and in a natural stream, respectively, using radioactive tracer techniques.

  6. The Role of Leaf Epicuticular Wax an Improved Adaptation to Moisture Deficit Environments in Wheat

    E-Print Network [OSTI]

    Mohammed, Suheb

    2014-05-02T23:59:59.000Z

    regions for cooler canopies, heat susceptible index, and grain yield components in winter wheat. This project aims to define the role that leaf epicuticular wax (EW) plays as a drought adaptive trait in terms of yield stability. A spring wheat Len...

  7. Leaf isoprene emission rate as a function of atmospheric CO2 concentration

    E-Print Network [OSTI]

    Jackson, Robert B.

    Leaf isoprene emission rate as a function of atmospheric CO2 concentration M I C H A E L J . W I L not show an increase in isoprene emission at the lowest CO2 concentration. However, isoprene emission rates exhibited a 30­40% reduction in isoprene emission rate when grown at 800 ppmv CO2, compared with 400 ppmv CO

  8. Rotational hysteresis of exchange-spring magnets.

    SciTech Connect (OSTI)

    Jiang, J.S.; Bader, S.D.; Kaper, H.; Leaf, G.K.; Shull, R.D.; Shapiro, A.J.; Gornakov, V.S.; Nikitenko, V.I.; Platt, C.L.; Berkowitz, A.E.; David, S.; Fullerton, E.E.

    2002-03-27T23:59:59.000Z

    We highlight our experimental studies and micromagnetic simulations of the rotational hysteresis in exchange-spring magnets. Magneto-optical imaging and torque magnetometry measurements for SmCo/Fe exchange-spring films with uniaxial in-plane anisotropy show that the magnetization rotation created in the magnetically soft Fe layer by a rotating magnetic field is hysteretic. The rotational hysteresis is due to the reversal of the chirality of the spin spiral structure. Micromagnetic simulations reveal two reversal modes of the chirality, one at low fields due to an in-plane untwisting of the spiral, and the other, at high fields, due to an out-of-plane fanning of the spiral.

  9. Carbon nanotube heat-exchange systems

    DOE Patents [OSTI]

    Hendricks, Terry Joseph (Arvada, CO); Heben, Michael J. (Denver, CO)

    2008-11-11T23:59:59.000Z

    A carbon nanotube heat-exchange system (10) and method for producing the same. One embodiment of the carbon nanotube heat-exchange system (10) comprises a microchannel structure (24) having an inlet end (30) and an outlet end (32), the inlet end (30) providing a cooling fluid into the microchannel structure (24) and the outlet end (32) discharging the cooling fluid from the microchannel structure (24). At least one flow path (28) is defined in the microchannel structure (24), fluidically connecting the inlet end (30) to the outlet end (32) of the microchannel structure (24). A carbon nanotube structure (26) is provided in thermal contact with the microchannel structure (24), the carbon nanotube structure (26) receiving heat from the cooling fluid in the microchannel structure (24) and dissipating the heat into an external medium (19).

  10. Dealing with Uncertainties During Heat Exchanger Design

    E-Print Network [OSTI]

    Polley, G. T.; Pugh, S. J.

    heat capacity flow rate of 30 kW/K. The cold stream flowing through E I bas a heat capacity flow rate of 55 kW/K and that flowing through E2 a value of 35 kW/K. 123 ESL-IE-01-05-20 Proceedings from the Twenty-third National Industrial Energy... Technology Conference, Houston, TX, May 1-4, 2001 E2 Area = 100 m 2 cp= 35 kW/K El Area = 300 m 2 Figure 1. Simple Heat Exchanger Network CP = 30 kW/K CP= 55 kWIK Assume that exchangers EI (of heat transfer area 100 m 2 ) and E2 (of 300 m 2...

  11. Development of a thermoacoustic natural gas liquefier.

    SciTech Connect (OSTI)

    Wollan, J. J. (John J.); Swift, G. W. (Gregory W.); Backhaus, S. N. (Scott N.); Gardner, D. L. (David L.)

    2002-01-01T23:59:59.000Z

    Praxair, in conjunction with the Los Alamos National Laboratory, is developing a new technology, thermoacoustic heat engines and refrigerators, for liquefaction of natural gas. This is the only technology capable of producing refrigeration power at cryogenic temperatures with no moving parts. A prototype, with a projected natural gas liquefaction capacity of 500 gallons/day, has been built and tested. The power source is a natural gas burner. Systems will be developed with liquefaction capacities up to 10,000 to 20,000 gallons per day. The technology, the development project, accomplishments and applications are discussed. In February 2001 Praxair, Inc. purchased the acoustic heat engine and refrigeration development program from Chart Industries. Chart (formerly Cryenco, which Chart purchased in 1997) and Los Alamos had been working on the technology development program since 1994. The purchase included assets and intellectual property rights for thermoacoustically driven orifice pulse tube refrigerators (TADOPTR), a new and revolutionary Thermoacoustic Stirling Heat Engine (TASHE) technology, aspects of Orifice Pulse Tube Refrigeration (OPTR) and linear motor compressors as OPTR drivers. Praxair, in cooperation with Los Alamos National Laboratory (LANL), the licensor of the TADOPTR and TASHE patents, is continuing the development of TASHE-OPTR natural gas powered, natural gas liquefiers. The liquefaction of natural gas, which occurs at -161 C (-259 F) at atmospheric pressure, has previously required rather sophisticated refrigeration machinery. The 1990 TADOPTR invention by Drs. Greg Swift (LANL) and Ray Radebaugh (NIST) demonstrated the first technology to produce cryogenic refrigeration with no moving parts. Thermoacoustic engines and refrigerators use acoustic phenomena to produce refrigeration from heat. The basic driver and refrigerator consist of nothing more than helium-filled heat exchangers and pipes, made of common materials, without exacting tolerances. The liquefier development program is divided into two components: Thermoacoustically driven refrigerators and linear motor driven refrigerators (LOPTRs). LOPTR technology will, for the foreseeable future, be limited to natural gas liquefaction capacities on the order of hundreds of gallons per day. TASHE-OPTR technology is expected to achieve liquefaction capacities of tens of thousands of gallons per day. This paper will focus on the TASHE-OPTR technology because its natural gas liquefaction capacity has greater market opportunity. LOPTR development will be mentioned briefly. The thermoacoustically driven refrigerator development program is now in the process of demonstrating the technology at a capacity of about 500 gallon/day (gpd) i.e., approximately 42,000 standard cubic feet/day, which requires about 7 kW of refrigeration power. This capacity is big enough to illuminate the issues of large-scale acoustic liquefaction at reasonable cost and to demonstrate the liquefaction of about 70% of an input gas stream, while burning about 30%. Subsequent to this demonstration a system with a capacity of approximately 10{sup 6} standard cubic feet/day (scfd) = 10,000 gpd with a projected liquefaction rate of about 85% of the input gas stream will be developed. When commercialized, the TASHE-OPTRs will be a totally new type of heat-driven cryogenic refrigerator, with projected low manufacturing cost, high reliability, long life, and low maintenance. A TASHE-OPTR will be able to liquefy a broad range of gases, one of the most important being natural gas (NG). Potential NG applications range from distributed liquefaction of pipeline gas as fuel for heavy-duty fleet and long haul vehicles to large-scale liquefaction at on-shore and offshore gas wellheads. An alternative to the thermoacoustic driver, but with many similar technical and market advantages, is the linear motor compressor. Linear motors convert electrical power directly into oscillating linear, or axial, motion. Attachment of a piston to the oscillator results in a direct drive compressor. Such a compressor

  12. Shale gas is natural gas trapped inside

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretary of EnergyFocus Group HSS/UnionGlossary Shale GasShale gas

  13. B.Jhne and E. Monahan (eds.), Air-Water GasTransfer, 1995 by AEON Verlag I Physical and Chemical Mechanisms

    E-Print Network [OSTI]

    Jaehne, Bernd

    of the Influence of Marine Biota on the Carbon Dioxide Ocean- Atmosphere Exchange in High Latitudes P. Prinos M Mixing in the Upper Ocean and Air-Sea Gas Transfer ð #12;B.Jähne and E. Monahan (eds.), Air-Water Gas. Hwang Spatial Measurements of Small-Scale Ocean Waves J. Klinke B. Jähne Measurements of Short Ocean

  14. Study on the heat transfer of heat exchangers for the Stirling Engine

    SciTech Connect (OSTI)

    Kanzaka, M. (Nagasaki Research and Development Center (JP)); Iwabuchi, M. (Advanced Technology Research Center, Mitsubishi Heavy Industries, Ltd. (JP))

    1991-01-01T23:59:59.000Z

    This paper reports that heat-transfer characteristics in heated tubes under periodically reversing flow conditions have been investigated experimentally using a test apparatus that simulates the heat exchangers for the actual Sterling engine. It was shown that the heat-transfer characteristics under these conditions were greatly affected by the piston phase-angle difference that generates the reversing flow of the working gas, and this phenomenon was proper to the heat transfer under the periodically reversing flow and was different from conventional heat transfer in steady flow. The experimental correlation considering the influence of the piston phase-angle difference for the heat-transfer coefficient has been induced by the use of the working gas velocity evaluated from the Schmidt cycle model which is one of the ideal Sterling cycles.

  15. Optimizing PT Arun LNG main heat exchanger

    SciTech Connect (OSTI)

    Irawan, B. [PT Arun NGL Co., Sumatra (Indonesia)

    1995-12-01T23:59:59.000Z

    The capacity of a LNG liquefaction unit has been increased by upgrading the refrigeration system, without making changes to the main heat exchanger (MHE). It is interesting, that after all modifications were completed, a higher refrigerant circulation alone could not increase LNG production. However, by optimizing the refrigerant component ratio, the UA of the MHE increased and LNG production improved. This technical evaluation will provide recommendations and show how the evaluation of the internal temperature profile helped optimize the MHE operating conditions.

  16. Catalysis using hydrous metal oxide ion exchangers

    DOE Patents [OSTI]

    Dosch, R.G.; Stephens, H.P.; Stohl, F.V.

    1983-07-21T23:59:59.000Z

    In a process which is catalyzed by a catalyst comprising an active metal on a carrier, said metal being active as a catalyst for the process, an improvement is provided wherein the catalyst is a hydrous, alkali metal or alkaline earth metal titanate, zirconate, niobate or tantalate wherein alkali or alkaline earth metal cations have been exchanged with a catalytically effective amount of cations of said metal.

  17. PRTR ion exchange vault water removal

    SciTech Connect (OSTI)

    Ham, J.E.

    1995-11-01T23:59:59.000Z

    This report documents the removal of radiologically contaminated water from the Plutonium Recycle Test Reactor (PRTR) ion exchange vault. Approximately 57,000 liters (15,000 gallons) of water had accumulated in the vault due to the absence of a rain cover. The water was removed and the vault inspected for signs of leakage. No evidence of leakage was found. The removal and disposal of the radiologically contaminated water decreased the risk of environmental contamination.

  18. Scientific Exchange Application | Photosynthetic Antenna Research Center

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementingnpitcheResearch BriefsTenney,ScienceScientific Exchange Program /

  19. Scientific Exchange Program deadline | Photosynthetic Antenna Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementingnpitcheResearch BriefsTenney,ScienceScientific Exchange Program

  20. Scientific Exchange Program deadline | Photosynthetic Antenna Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiationImplementingnpitcheResearch BriefsTenney,ScienceScientific Exchange

  1. A Laboratory Study of the Schmidt Number Dependency of Air-Water Gas

    E-Print Network [OSTI]

    Jaehne, Bernd

    . Sc = /D denotes the Schmidt number, the ratio of kinematic viscosity of water and the tracersA Laboratory Study of the Schmidt Number Dependency of Air-Water Gas Transfer Kerstin Richter1 of exchange hap- pens with an exponent of 1/2 and links this fraction with a physical property of the wave

  2. Steam generators two phase flows numerical simulation with liquid and gas momentum equations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . The secondary flow is another loop that links the steam generator and the turbines. Inside the exchangerSteam generators two phase flows numerical simulation with liquid and gas momentum equations M Abstract This work takes place in steam generators flow studies and we consider here steady state three

  3. Viscous lock-exchange in rectangular channels

    E-Print Network [OSTI]

    Jerome Martin; Nicole Rakotomalala; Laurent Talon; Dominique Salin

    2010-11-29T23:59:59.000Z

    In a viscous lock-exchange gravity current, which describes the reciprocal exchange of two fluids of different densities in a horizontal channel, the front between two Newtonian fluids spreads as the square root of time. The resulting diffusion coefficient reflects the competition between the buoyancy driving effect and the viscous damping, and depends on the geometry of the channel. This lock-exchange diffusion coefficient has already been computed for a porous medium, a 2D Stokes flow between two parallel horizontal boundaries separated by a vertical height, H, and, recently, for a cylindrical tube. In the present paper, we calculate it, analytically, for a rectangular channel (horizontal thickness b, vertical height, H) of any aspect ratio (H/b) and compare our results with experiments in horizontal rectangular channels for a wide range of aspect ratios (1/10-10). We also discuss the 2D Stokes-Darcy model for flows in Hele-Shaw cells and show that it leads to a rather good approximation, when an appropriate Brinkman correction is used.

  4. Challenges, uncertainties and issues facing gas production from gas hydrate deposits

    E-Print Network [OSTI]

    Moridis, G.J.

    2011-01-01T23:59:59.000Z

    of Gas Price ($/Mscf) for Offshore Gas Hydrate StudyEvaluation of deepwater gas-hydrate systems. The Leadingfor Gas Production from Gas Hydrates Reservoirs. J. Canadian

  5. Oil and Gas Exploration

    E-Print Network [OSTI]

    Tingley, Joseph V.

    , oil and gas, and geothermal activities and accomplishments in Nevada: production statistics Products 23. Sloan dolomite quarry 24. Weiser gypsum quarry Oil Fields 1. Blackburn field 2. North WillowMetals Industrial Minerals Oil and Gas Geothermal Exploration Development Mining Processing Nevada

  6. Illinois Natural Gas Summary

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

    Withdrawals NA NA NA NA NA NA 1991-2014 From Gas Wells NA NA NA NA NA NA 1991-2014 From Oil Wells NA NA NA NA NA NA 1991-2014 From Shale Gas Wells NA NA NA NA NA NA 2007-2014...

  7. Montana Natural Gas Summary

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

    Withdrawals NA NA NA NA NA NA 1991-2014 From Gas Wells NA NA NA NA NA NA 1991-2014 From Oil Wells NA NA NA NA NA NA 1991-2014 From Shale Gas Wells NA NA NA NA NA NA 2007-2014...

  8. Gas Kick Mechanistic Model

    E-Print Network [OSTI]

    Zubairy, Raheel

    2014-04-18T23:59:59.000Z

    -gain and temperature profile in the annulus. This research focuses on these changes in these parameters to be able to detect the occurrence of gas kick and the circulation of the gas kick out from the well. In this thesis, we have developed a model that incorporates...

  9. Fission gas detection system

    DOE Patents [OSTI]

    Colburn, Richard P. (Pasco, WA)

    1985-01-01T23:59:59.000Z

    A device for collecting fission gas released by a failed fuel rod which device uses a filter to pass coolant but which filter blocks fission gas bubbles which cannot pass through the filter due to the surface tension of the bubble.

  10. Western Europe's future gas supplies

    SciTech Connect (OSTI)

    Kardaun, G.

    1983-05-01T23:59:59.000Z

    Decline in indigenous natural gas production by 2000 will be compensated by imported natural gas and LNG and gas from unconventional sources. Coal gas will furnish about 10 percent of the demand, more natural gas imports will come from North Africa and the USSR and additional LNG will come from West Africa, the Middle East and the Western Hemisphere.

  11. Natural gas: Governments and oil companies in the Third World

    SciTech Connect (OSTI)

    Davidson, A.; Hurst, C.; Mabro, R.

    1988-01-01T23:59:59.000Z

    It is asserted that oil companies claim to be generally receptive to gas development proposals; however, the lack of potential markets for gas, problems of foreign exchange convertibility, and lack of a legal framework often hinders their engagement. Governments, on the other hand, need to secure domestic energy supply and, if possible, gain some export earnings or royalties. An extensive discussion on the principles of pricing and fiscal regimes, potential points of disagreement is provided. A course of action is outlined from the managerial point of view to circumvent the most common pitfalls in planning and financing a gas project. Eight very detailed case studies are presented for Argentina, Egypt, Malaysia, Nigeria, Pakistan, Tanzania, Tunisia and Thailand.

  12. Gas pump with movable gas pumping panels

    DOE Patents [OSTI]

    Osher, John E. (Alamo, CA)

    1984-01-01T23:59:59.000Z

    Apparatus for pumping gas continuously a plurality of articulated panels of getter material, each of which absorbs gases on one side while another of its sides is simultaneously reactivated in a zone isolated by the panels themselves from a working space being pumped.

  13. Shale gas production: potential versus actual greenhouse gas emissions

    E-Print Network [OSTI]

    O’Sullivan, Francis Martin

    Estimates of greenhouse gas (GHG) emissions from shale gas production and use are controversial. Here we assess the level of GHG emissions from shale gas well hydraulic fracturing operations in the United States during ...

  14. Intermountain Gas Company (IGC)- Gas Heating Rebate Program

    Broader source: Energy.gov [DOE]

    The Intermountain Gas Company's (IGC) Gas Heating Rebate Program offers customers a $200 per unit rebate when they convert to a high efficiency natural gas furnace that replaces a heating system...

  15. Peoples Gas and North Shore Gas- Bonus Rebate Program (Illinois)

    Broader source: Energy.gov [DOE]

    The Peoples Gas and North Shore Gas Natural Gas Savings Programs are offering the following bonus rebates (in addition to the joint utilities bonus rebate). For both offers below, installation must...

  16. Underground Storage of Natural Gas and Liquefied Petroleum Gas (Nebraska)

    Broader source: Energy.gov [DOE]

    This statute declares underground storage of natural gas and liquefied petroleum gas to be in the public interest if it promotes the conservation of natural gas and permits the accumulation of...

  17. EIA - Natural Gas Pipeline Network - Natural Gas Supply Basins...

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

    Corridors About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through 20072008 with selected updates U.S. Natural Gas Supply Basins Relative to Major Natural...

  18. Supersonic gas compressor

    DOE Patents [OSTI]

    Lawlor, Shawn P. (Bellevue, WA); Novaresi, Mark A. (San Diego, CA); Cornelius, Charles C. (Kirkland, WA)

    2007-11-13T23:59:59.000Z

    A gas compressor based on the use of a driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. In using this method to compress inlet gas, the supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdyanamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by the use of a pre-swirl compressor, and using a bypass stream to bleed a portion of the intermediate pressure gas after passing through the pre-swirl compressor back to the inlet of the pre-swirl compressor. Inlet guide vanes to the compression ramp enhance overall efficiency.

  19. Cryogenic treatment of gas

    DOE Patents [OSTI]

    Bravo, Jose Luis (Houston, TX); Harvey, III, Albert Destrehan (Kingwood, TX); Vinegar, Harold J. (Bellaire, TX)

    2012-04-03T23:59:59.000Z

    Systems and methods of treating a gas stream are described. A method of treating a gas stream includes cryogenically separating a first gas stream to form a second gas stream and a third stream. The third stream is cryogenically contacted with a carbon dioxide stream to form a fourth and fifth stream. A majority of the second gas stream includes methane and/or molecular hydrogen. A majority of the third stream includes one or more carbon oxides, hydrocarbons having a carbon number of at least 2, one or more sulfur compounds, or mixtures thereof. A majority of the fourth stream includes one or more of the carbon oxides and hydrocarbons having a carbon number of at least 2. A majority of the fifth stream includes hydrocarbons having a carbon number of at least 3 and one or more of the sulfur compounds.

  20. Gas Storage Technology Consortium

    SciTech Connect (OSTI)

    Joel Morrison

    2005-09-14T23:59:59.000Z

    Gas storage is a critical element in the natural gas industry. Producers, transmission and distribution companies, marketers, and end users all benefit directly from the load balancing function of storage. The unbundling process has fundamentally changed the way storage is used and valued. As an unbundled service, the value of storage is being recovered at rates that reflect its value. Moreover, the marketplace has differentiated between various types of storage services, and has increasingly rewarded flexibility, safety, and reliability. The size of the natural gas market has increased and is projected to continue to increase towards 30 trillion cubic feet (TCF) over the next 10 to 15 years. Much of this increase is projected to come from electric generation, particularly peaking units. Gas storage, particularly the flexible services that are most suited to electric loads, is critical in meeting the needs of these new markets. In order to address the gas storage needs of the natural gas industry, an industry driven consortium was created--the Gas Storage Technology Consortium (GSTC). The objective of the GSTC is to provide a means to accomplish industry-driven research and development designed to enhance operational flexibility and deliverability of the Nation's gas storage system, and provide a cost effective, safe, and reliable supply of natural gas to meet domestic demand. This report addresses the activities for the quarterly period of April 1, 2005 through June 30, 2005. During this time period efforts were directed toward (1) GSTC administration changes, (2) participating in the American Gas Association Operations Conference and Biennial Exhibition, (3) issuing a Request for Proposals (RFP) for proposal solicitation for funding, and (4) organizing the proposal selection meeting.