National Library of Energy BETA

Sample records for dynamic compression sector

  1. Extreme dynamic compression with a low energy laser pulse (Conference...

    Office of Scientific and Technical Information (OSTI)

    Conference: Extreme dynamic compression with a low energy laser pulse Citation Details In-Document Search Title: Extreme dynamic compression with a low energy laser pulse You ...

  2. Reflectance thermometry in dynamic compression experiments. (Conference) |

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Reflectance thermometry in dynamic compression experiments. Citation Details In-Document Search Title: Reflectance thermometry in dynamic compression experiments. Abstract not provided. Authors: Dolan, Daniel H., ; Ao, Tommy ; Seagle, Christopher T Publication Date: 2012-02-01 OSTI Identifier: 1118217 Report Number(s): SAND2012-0864C 481321 DOE Contract Number: AC04-94AL85000 Resource Type: Conference Resource Relation: Conference: 9th International Temperature Symposium held

  3. Prospects for achieving high dynamic compression with low energy...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Prospects for achieving high dynamic compression with low energy Citation Details In-Document Search ... Publication Date: 2012-07-30 OSTI Identifier: 1057245 Report ...

  4. Extreme dynamic compression with a low energy laser pulse (Conference) |

    Office of Scientific and Technical Information (OSTI)

    SciTech Connect Conference: Extreme dynamic compression with a low energy laser pulse Citation Details In-Document Search Title: Extreme dynamic compression with a low energy laser pulse Authors: Armstrong, M R ; Crowhurst, J C ; Zaug, J M ; Radousky, H B Publication Date: 2015-08-18 OSTI Identifier: 1234612 Report Number(s): LLNL-PROC-676476 DOE Contract Number: AC52-07NA27344 Resource Type: Conference Resource Relation: Conference: Presented at: Extreme dynamic compression with a low

  5. Dynamic and other secondary benefits of compressed air energy storage

    SciTech Connect (OSTI)

    Allen, R.D.; Doherty, T.J.

    1984-05-01

    Dynamic benefits of compressed air energy storage include load following, voltage regulation, provision for emergency power, and spinning reserve. Other secondary benefits include environmental acceptability and economic feasibility within the spectrum of potential energy storage methods. Geologic reservoir candidates are salt cavities, hard rock caverns and water-bearing permeable formations occurring as structural traps; the compatibility of solution-mined salt cavities with desired dynamic benefits is illustrated by positive results at Huntorf, West Germany. Air injection into and withdrawal from an aquifer has been conducted successfully at Pittsfield, Illinois. Environmental impacts are believed to be less important than corresponding impacts in rival storage technologies.

  6. Dynamic Time Expansion and Compression Using Nonlinear Waveguides

    DOE Patents [OSTI]

    Findikoglu, Alp T.; Hahn, Sangkoo F.; Jia, Quanxi

    2004-06-22

    Dynamic time expansion or compression of a small amplitude input signal generated with an initial scale is performed using a nonlinear waveguide. A nonlinear waveguide having a variable refractive index is connected to a bias voltage source having a bias signal amplitude that is large relative to the input signal to vary the reflective index and concomitant speed of propagation of the nonlinear waveguide and an electrical circuit for applying the small amplitude signal and the large amplitude bias signal simultaneously to the nonlinear waveguide. The large amplitude bias signal with the input signal alters the speed of propagation of the small-amplitude signal with time in the nonlinear waveguide to expand or contract the initial time scale of the small-amplitude input signal.

  7. Dynamic time expansion and compression using nonlinear waveguides

    DOE Patents [OSTI]

    Findikoglu, Alp T.; Hahn, Sangkoo F.; Jia, Quanxi

    2004-06-22

    Dynamic time expansion or compression of a small-amplitude input signal generated with an initial scale is performed using a nonlinear waveguide. A nonlinear waveguide having a variable refractive index is connected to a bias voltage source having a bias signal amplitude that is large relative to the input signal to vary the reflective index and concomitant speed of propagation of the nonlinear waveguide and an electrical circuit for applying the small-amplitude signal and the large amplitude bias signal simultaneously to the nonlinear waveguide. The large amplitude bias signal with the input signal alters the speed of propagation of the small-amplitude signal with time in the nonlinear waveguide to expand or contract the initial time scale of the small-amplitude input signal.

  8. Dynamic Time Expansion and Compression Using Nonlinear Waveguides...

    Office of Scientific and Technical Information (OSTI)

    Country of Publication: United States Language: English Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; COMPRESSION; REFRACTIVE INDEX; VELOCITY; ...

  9. Sub-100 ps laser-driven dynamic compression of solid deuterium...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Sub-100 ps laser-driven dynamic compression of solid deuterium with a 40 J laser pulse Citation Details In-Document Search Title: Sub-100 ps laser-driven ...

  10. Sub-100 ps laser-driven dynamic compression of solid deuterium...

    Office of Scientific and Technical Information (OSTI)

    a 40 J laser pulse Citation Details In-Document Search Title: Sub-100 ps laser-driven dynamic compression of solid deuterium with a 40 J laser pulse You are ...

  11. Dynamic control of a homogeneous charge compression ignition engine

    DOE Patents [OSTI]

    Duffy, Kevin P.; Mehresh, Parag; Schuh, David; Kieser, Andrew J.; Hergart, Carl-Anders; Hardy, William L.; Rodman, Anthony; Liechty, Michael P.

    2008-06-03

    A homogenous charge compression ignition engine is operated by compressing a charge mixture of air, exhaust and fuel in a combustion chamber to an autoignition condition of the fuel. The engine may facilitate a transition from a first combination of speed and load to a second combination of speed and load by changing the charge mixture and compression ratio. This may be accomplished in a consecutive engine cycle by adjusting both a fuel injector control signal and a variable valve control signal away from a nominal variable valve control signal. Thereafter in one or more subsequent engine cycles, more sluggish adjustments are made to at least one of a geometric compression ratio control signal and an exhaust gas recirculation control signal to allow the variable valve control signal to be readjusted back toward its nominal variable valve control signal setting. By readjusting the variable valve control signal back toward its nominal setting, the engine will be ready for another transition to a new combination of engine speed and load.

  12. Dynamic compression of synthetic diamond windows (final report for LDRD project 93531).

    SciTech Connect (OSTI)

    Dolan, Daniel H.,

    2008-09-01

    Diamond is an attractive dynamic compression window for many reasons: high elastic limit,large mechanical impedance, and broad transparency range. Natural diamonds, however, aretoo expensive to be used in destructive experiments. Chemical vapor deposition techniquesare now able to produce large single-crystal windows, opening up many potential dynamiccompression applications. This project studied the behavior of synthetic diamond undershock wave compression. The results suggest that synthetic diamond could be a usefulwindow in this field, though complete characterization proved elusive.3

  13. Sub-100 ps laser-driven dynamic compression of solid deuterium with a ~ 40

    Office of Scientific and Technical Information (OSTI)

    μ J laser pulse (Journal Article) | SciTech Connect Journal Article: Sub-100 ps laser-driven dynamic compression of solid deuterium with a ~ 40 μ J laser pulse Citation Details In-Document Search Title: Sub-100 ps laser-driven dynamic compression of solid deuterium with a ~ 40 μ J laser pulse Authors: Armstrong, M ; Crowhurst, J ; Bastea, S ; Zaug, J ; Goncharov, A Publication Date: 2014-07-14 OSTI Identifier: 1158883 Report Number(s): LLNL-JRNL-513474 Journal ID: ISSN 0003-6951; APPLAB

  14. Pre-Compression for Dynamic Gas Gun Loading. (Conference) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Pre-Compression for Dynamic Gas Gun Loading. Citation Details In-Document Search Title: Pre-Compression for Dynamic Gas Gun Loading. Abstract not provided. Authors: Seagle, Christopher T Publication Date: 2014-02-01 OSTI Identifier: 1141160 Report Number(s): SAND2014-1631C 505044 DOE Contract Number: DE-AC04-94AL85000 Resource Type: Conference Resource Relation: Conference: APS March Meeting held March 3 - February 7, 2014 in Denver, CO.; Related Information: Proposed for presentation at the APS

  15. Modeling ramp compression experiments using large-scale molecular dynamics simulation.

    SciTech Connect (OSTI)

    Mattsson, Thomas Kjell Rene; Desjarlais, Michael Paul; Grest, Gary Stephen; Templeton, Jeremy Alan; Thompson, Aidan Patrick; Jones, Reese E.; Zimmerman, Jonathan A.; Baskes, Michael I.; Winey, J. Michael; Gupta, Yogendra Mohan; Lane, J. Matthew D.; Ditmire, Todd; Quevedo, Hernan J.

    2011-10-01

    Molecular dynamics simulation (MD) is an invaluable tool for studying problems sensitive to atomscale physics such as structural transitions, discontinuous interfaces, non-equilibrium dynamics, and elastic-plastic deformation. In order to apply this method to modeling of ramp-compression experiments, several challenges must be overcome: accuracy of interatomic potentials, length- and time-scales, and extraction of continuum quantities. We have completed a 3 year LDRD project with the goal of developing molecular dynamics simulation capabilities for modeling the response of materials to ramp compression. The techniques we have developed fall in to three categories (i) molecular dynamics methods (ii) interatomic potentials (iii) calculation of continuum variables. Highlights include the development of an accurate interatomic potential describing shock-melting of Beryllium, a scaling technique for modeling slow ramp compression experiments using fast ramp MD simulations, and a technique for extracting plastic strain from MD simulations. All of these methods have been implemented in Sandia's LAMMPS MD code, ensuring their widespread availability to dynamic materials research at Sandia and elsewhere.

  16. The effect of shock dynamics on compressibility of ignition-scale National Ignition Facility implosions

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

    Zylstra, A. B.; Frenje, J. A.; Séguin, F. H.; Hicks, D. G.; Dewald, E. L.; Robey, H. F.; Rygg, J. R.; Meezan, N. B.; Rosenberg, M. J.; Rinderknecht, H. G.; et al

    2014-11-03

    The effects of shock dynamics on compressibility of indirect-drive ignition-scale surrogate implosions, CH shells filled with D3He gas, have been studied using charged-particle spectroscopy. Spectral measurements of D3He protons produced at the shock-bang time probe the shock dynamics and in-flight characteristics of an implosion. The proton shock yield is found to vary by over an order of magnitude. A simple model relates the observed yield to incipient hot-spot adiabat, suggesting that implosions with rapid radiation-power increase during the main drive pulse may have a 2x higher hot-spot adiabat, potentially reducing compressibility. A self-consistent 1-D implosion model was used to infermore » the areal density (pR) and the shell center-of-mass radius (Rcm) from the downshift of the shock-produced D3He protons. The observed pR at shock-bang time is substantially higher for implosions, where the laser drive is on until near the compression bang time ('short-coast'), while longer-coasting implosions have lower pR. This corresponds to a much larger temporal difference between the shock- and compression-bang time in the long-coast implosions (~800 ps) than in the short-coast (~400 ps); this will be verified with a future direct bang-time diagnostic. This model-inferred differential bang time contradicts radiation-hydrodynamic simulations, which predict constant 700–800 ps differential independent of coasting time. This result is potentially explained by uncertainties in modeling late-time ablation drive on the capsule. In an ignition experiment, an earlier shock-bang time resulting in an earlier onset of shell deceleration, potentially reducing compression and, thus, fuel pR.« less

  17. Numerical investigation on target implosions driven by radiation ablation and shock compression in dynamic hohlraums

    SciTech Connect (OSTI)

    Xiao, Delong; Sun, Shunkai; Zhao, Yingkui; Ding, Ning; Wu, Jiming; Dai, Zihuan; Yin, Li; Zhang, Yang; Xue, Chuang

    2015-05-15

    In a dynamic hohlraum driven inertial confinement fusion (ICF) configuration, the target may experience two different kinds of implosions. One is driven by hohlraum radiation ablation, which is approximately symmetric at the equator and poles. The second is caused by the radiating shock produced in Z-pinch dynamic hohlraums, only taking place at the equator. To gain a symmetrical target implosion driven by radiation ablation and avoid asymmetric shock compression is a crucial issue in driving ICF using dynamic hohlraums. It is known that when the target is heated by hohlraum radiation, the ablated plasma will expand outward. The pressure in the shocked converter plasma qualitatively varies linearly with the material temperature. However, the ablation pressure in the ablated plasma varies with 3.5 power of the hohlraum radiation temperature. Therefore, as the hohlraum temperature increases, the ablation pressure will eventually exceed the shock pressure, and the expansion of the ablated plasma will obviously weaken the shock propagation and decrease its velocity after propagating into the ablator plasma. Consequently, longer time duration is provided for the symmetrical target implosion driven by radiation ablation. In this paper these processes are numerically investigated by changing drive currents or varying load parameters. The simulation results show that a critical hohlraum radiation temperature is needed to provide a high enough ablation pressure to decelerate the shock, thus providing long enough time duration for the symmetric fuel compression driven by radiation ablation.

  18. Release Path Temperatures of Shock-Compressed Tin from Dynamic Reflectance and Radiance Measurements

    SciTech Connect (OSTI)

    La Lone, B. M.; Stevens, G. D.; Turley, W. D.; Holtkamp, D. B.; Iverson, A. J.; Hixson, R. S.; Veeser, L. R.

    2013-08-01

    Dynamic reflectance and radiance measurements were conducted for tin samples shock compressed to 35 GPa and released to 15 GPa using high explosives. We determined the reflectance of the tin samples glued to lithium fluoride windows using an integrating sphere with an internal xenon flashlamp as an illumination source. The dynamic reflectance (R) was determined at near normal incidence in four spectral bands with coverage in visible and near-infrared spectra. Uncertainties in R/R0 are < 2%, and uncertainties in absolute reflectance are < 5%. In complementary experiments, thermal radiance from the tin/glue/lithium fluoride interface was recorded with similar shock stress and spectral coverage as the reflectance measurements. The two sets of experiments were combined to obtain the temperature history of the tin surface with an uncertainty of < 2%. The stress at the interface was determined from photonic Doppler velocimetry and combined with the temperatures to obtain temperature-stress release paths for tin. We discuss the relationship between the experimental release paths and release isentropes that begin on the principal shock Hugoniot.

  19. Release path temperatures of shock-compressed tin from dynamic reflectance and radiance measurements

    SciTech Connect (OSTI)

    La Lone, B. M. Stevens, G. D.; Turley, W. D.; Holtkamp, D. B.; Iverson, A. J.; Hixson, R. S.; Veeser, L. R.

    2013-08-14

    Dynamic reflectance and radiance measurements were conducted for tin samples shock compressed to 35 GPa and released to 15 GPa using high explosives. We determined the reflectance of the tin samples glued to lithium fluoride windows using an integrating sphere with an internal xenon flashlamp as an illumination source. The dynamic reflectance (R) was determined at near normal incidence in four spectral bands with coverage in visible and near-infrared spectra. Uncertainties in R/R{sub 0} are <2%, and uncertainties in absolute reflectance are <5%. In complementary experiments, thermal radiance from the tin/glue/lithium fluoride interface was recorded with similar shock stress and spectral coverage as the reflectance measurements. The two sets of experiments were combined to obtain the temperature history of the tin surface with an uncertainty of <2%. The stress at the interface was determined from photonic Doppler velocimetry and combined with the temperatures to obtain temperature-stress release paths for tin. We discuss the relationship between the experimental release paths and release isentropes that begin on the principal shock Hugoniot.

  20. Online remote control systems for static and dynamic compression and decompression using diamond anvil cells

    SciTech Connect (OSTI)

    Sinogeikin, Stanislav V. Smith, Jesse S.; Rod, Eric; Lin, Chuanlong; Kenney-Benson, Curtis; Shen, Guoyin

    2015-07-15

    The ability to remotely control pressure in diamond anvil cells (DACs) in accurate and consistent manner at room temperature, as well as at cryogenic and elevated temperatures, is crucial for effective and reliable operation of a high-pressure synchrotron facility such as High Pressure Collaborative Access Team (HPCAT). Over the last several years, a considerable effort has been made to develop instrumentation for remote and automated pressure control in DACs during synchrotron experiments. We have designed and implemented an array of modular pneumatic (double-diaphragm), mechanical (gearboxes), and piezoelectric devices and their combinations for controlling pressure and compression/decompression rate at various temperature conditions from 4 K in cryostats to several thousand Kelvin in laser-heated DACs. Because HPCAT is a user facility and diamond cells for user experiments are typically provided by users, our development effort has been focused on creating different loading mechanisms and frames for a variety of existing and commonly used diamond cells rather than designing specialized or dedicated diamond cells with various drives. In this paper, we review the available instrumentation for remote static and dynamic pressure control in DACs and show some examples of their applications to high pressure research.

  1. Retrofit device to improve vapor compression cooling system performance by dynamic blower speed modulation

    DOE Patents [OSTI]

    Roth, Robert Paul; Hahn, David C.; Scaringe, Robert P.

    2015-12-08

    A device and method are provided to improve performance of a vapor compression system using a retrofittable control board to start up the vapor compression system with the evaporator blower initially set to a high speed. A baseline evaporator operating temperature with the evaporator blower operating at the high speed is recorded, and then the device detects if a predetermined acceptable change in evaporator temperature has occurred. The evaporator blower speed is reduced from the initially set high speed as long as there is only a negligible change in the measured evaporator temperature and therefore a negligible difference in the compressor's power consumption so as to obtain a net increase in the Coefficient of Performance.

  2. Studies of Dynamic Properties of Shock Compressed FCC Crystals by in Situ Dynamic X-Ray Diffraction

    SciTech Connect (OSTI)

    Baldis, H.; Kalantar, D.H.; Remington, B.A.; Belak, J.; Colvin, J.; Boehly, T.R.; Meyers, M.A.; Wark, J.S.; Paisley, D.; Hollan, B.; Lomdahl, P.; German, T.

    2001-08-14

    There were 5 laser experiments conducted to date in FY-01 under the ongoing project to study the response of single crystal fcc materials under shock compression. An additional 10 laser shots are planned for August, 2001. This work has focused on developing capability to record diffraction from multiple lattice planes during the passage of a shock through a thin foil of single crystal copper, while simultaneously performing separate shock sample recovery experiments to study the residual deformation structure in the recovered samples.

  3. Dynamic High-temperature Testing of an Iridium Alloy in Compression at High-strain Rates: Dynamic High-temperature Testing

    SciTech Connect (OSTI)

    Song, B.; Nelson, K.; Lipinski, R.; Bignell, J.; Ulrich, G.; George, E. P.

    2014-08-21

    Iridium alloys have superior strength and ductility at elevated temperatures, making them useful as structural materials for certain high-temperature applications. However, experimental data on their high-strain -rate performance are needed for understanding high-speed impacts in severe environments. Kolsky bars (also called split Hopkinson bars) have been extensively employed for high-strain -rate characterization of materials at room temperature, but it has been challenging to adapt them for the measurement of dynamic properties at high temperatures. In our study, we analyzed the difficulties encountered in high-temperature Kolsky bar testing of thin iridium alloy specimens in compression. We made appropriate modifications using the current high-temperature Kolsky bar technique in order to obtain reliable compressive stress–strain response of an iridium alloy at high-strain rates (300–10 000 s-1) and temperatures (750 and 1030°C). The compressive stress–strain response of the iridium alloy showed significant sensitivity to both strain rate and temperature.

  4. Dynamic High-temperature Testing of an Iridium Alloy in Compression at High-strain Rates: Dynamic High-temperature Testing

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

    Song, B.; Nelson, K.; Lipinski, R.; Bignell, J.; Ulrich, G.; George, E. P.

    2014-08-21

    Iridium alloys have superior strength and ductility at elevated temperatures, making them useful as structural materials for certain high-temperature applications. However, experimental data on their high-strain -rate performance are needed for understanding high-speed impacts in severe environments. Kolsky bars (also called split Hopkinson bars) have been extensively employed for high-strain -rate characterization of materials at room temperature, but it has been challenging to adapt them for the measurement of dynamic properties at high temperatures. In our study, we analyzed the difficulties encountered in high-temperature Kolsky bar testing of thin iridium alloy specimens in compression. We made appropriate modifications using themore » current high-temperature Kolsky bar technique in order to obtain reliable compressive stress–strain response of an iridium alloy at high-strain rates (300–10 000 s-1) and temperatures (750 and 1030°C). The compressive stress–strain response of the iridium alloy showed significant sensitivity to both strain rate and temperature.« less

  5. Compressed Air

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

    Lighting Compressed Air ESUE Motors Federal Agriculture Compressed Air Compressed Air Roadmap The Bonneville Power Administration created the roadmap to help utilities find energy...

  6. Analysis of shockless dynamic compression data on solids to multi-megabar pressures: Application to tantalum

    SciTech Connect (OSTI)

    Davis, Jean -Paul; Brown, Justin L.; Knudson, Marcus D.; Lemke, Raymond W.

    2014-11-26

    In this research, magnetically-driven, planar shockless-compression experiments to multi-megabar pressures were performed on tantalum samples using a stripline target geometry. Free-surface velocity waveforms were measured in 15 cases; nine of these in a dual-sample configuration with two samples of different thicknesses on opposing electrodes, and six in a single-sample configuration with a bare electrode opposite the sample. Details are given on the application of inverse Lagrangian analysis (ILA) to these data, including potential sources of error. The most significant source of systematic error, particularly for single-sample experiments, was found to arise from the pulse-shape dependent free-surface reflected wave interactions with the deviatoric-stress response of tantalum. This could cause local, possibly temporary, unloading of material from a ramp compressed state, and thus multi-value response in wave speed that invalidates the free-surface to in-material velocity mapping step of ILA. By averaging all 15 data sets, a final result for the principal quasi-isentrope of tantalum in stress-strain was obtained to a peak longitudinal stress of 330 GPa with conservative uncertainty bounds of ±4.5% in stress. The result agrees well with a tabular equation of state developed at Los Alamos National Laboratory.

  7. Analysis of shockless dynamic compression data on solids to multi-megabar pressures: Application to tantalum

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

    Davis, Jean -Paul; Brown, Justin L.; Knudson, Marcus D.; Lemke, Raymond W.

    2014-11-26

    In this research, magnetically-driven, planar shockless-compression experiments to multi-megabar pressures were performed on tantalum samples using a stripline target geometry. Free-surface velocity waveforms were measured in 15 cases; nine of these in a dual-sample configuration with two samples of different thicknesses on opposing electrodes, and six in a single-sample configuration with a bare electrode opposite the sample. Details are given on the application of inverse Lagrangian analysis (ILA) to these data, including potential sources of error. The most significant source of systematic error, particularly for single-sample experiments, was found to arise from the pulse-shape dependent free-surface reflected wave interactions withmore » the deviatoric-stress response of tantalum. This could cause local, possibly temporary, unloading of material from a ramp compressed state, and thus multi-value response in wave speed that invalidates the free-surface to in-material velocity mapping step of ILA. By averaging all 15 data sets, a final result for the principal quasi-isentrope of tantalum in stress-strain was obtained to a peak longitudinal stress of 330 GPa with conservative uncertainty bounds of ±4.5% in stress. The result agrees well with a tabular equation of state developed at Los Alamos National Laboratory.« less

  8. Studies of dynamic properties of shock compressed single crystals by in situ dynamic x-ray diffraction and sample recovery

    SciTech Connect (OSTI)

    Meyers, Marc A.; Schneider, M. S.; Jarmakani, H.; Kad, B.; Remington, B. A.; Kalantar, D. H.; McNaney, J.; Cao, B.; Belak, J.; E Bringa, G. Collins; Paisley, D.; Holian, B.; Lomdahl, P.; Boehly, T. R; Wark, J.

    2007-05-05

    Laser compression provides pressures ranging from a few to hundreds of GPa at pulse durations of the order of nanoseconds or fractions thereof. The short duration ensures a rapid decay of the pulse and quenching of shocked sample in times that are orders of magnitude lower than in conventional explosively driven plate impact experiments. Systematic experiments carried out in specimens well suited for transmission electron microscopy characterization are revealing that laser compression, by virtue of a much more rapid cooling, enables the retention of a deformation structure closer to the one existing during shock. The smaller pulse length decreases the propensity for localization. Copper and copper aluminum (2 and 6 wt% Al) with orientations [001] and [ ] were subjected to high intensity laser pulses with energy levels of 70 to 300 J delivered in a pulse duration of approximately 3 ns. Systematic differences of the defect substructure were observed as a function of pressure and stacking fault energy. The changes in the mechanical properties for each condition were compared using micro- and nano-hardness measurements and correlated well with observations of the defect substructure. Three regimes of plastic deformation were identified and their transitions modeled: dislocation cells, stacking faults, and twins. An existing constitutive description of the slip to twinning transition, based on the critical shear stress, was expanded to incorporate the effect of stacking-fault energy. A new physically-based criterion accounting for stacking fault energy was developed that describes the transition from perfect loop to partial loop homogeneous nucleation, and consequently from cells to stacking faults. These calculations predict transitions that are in qualitative agreement with the effect of SFE.

  9. Compression embedding

    DOE Patents [OSTI]

    Sandford, II, Maxwell T.; Handel, Theodore G.; Bradley, Jonathan N.

    1998-01-01

    A method and apparatus for embedding auxiliary information into the digital representation of host data created by a lossy compression technique and a method and apparatus for constructing auxiliary data from the correspondence between values in a digital key-pair table with integer index values existing in a representation of host data created by a lossy compression technique. The methods apply to data compressed with algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as ordered sequences of blocks containing integer indices having redundancy and uncertainty of value by one unit, allowing indices which are adjacent in value to be manipulated to encode auxiliary data. Also included is a method to improve the efficiency of lossy compression algorithms by embedding white noise into the integer indices. Lossy compression methods use loss-less compression to reduce to the final size the intermediate representation as indices. The efficiency of the loss-less compression, known also as entropy coding compression, is increased by manipulating the indices at the intermediate stage. Manipulation of the intermediate representation improves lossy compression performance by 1 to 10%.

  10. Compression embedding

    DOE Patents [OSTI]

    Sandford, M.T. II; Handel, T.G.; Bradley, J.N.

    1998-07-07

    A method and apparatus for embedding auxiliary information into the digital representation of host data created by a lossy compression technique and a method and apparatus for constructing auxiliary data from the correspondence between values in a digital key-pair table with integer index values existing in a representation of host data created by a lossy compression technique are disclosed. The methods apply to data compressed with algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as ordered sequences of blocks containing integer indices having redundancy and uncertainty of value by one unit, allowing indices which are adjacent in value to be manipulated to encode auxiliary data. Also included is a method to improve the efficiency of lossy compression algorithms by embedding white noise into the integer indices. Lossy compression methods use loss-less compression to reduce to the final size the intermediate representation as indices. The efficiency of the loss-less compression, known also as entropy coding compression, is increased by manipulating the indices at the intermediate stage. Manipulation of the intermediate representation improves lossy compression performance by 1 to 10%. 21 figs.

  11. Compression embedding

    DOE Patents [OSTI]

    Sandford, M.T. II; Handel, T.G.; Bradley, J.N.

    1998-03-10

    A method of embedding auxiliary information into the digital representation of host data created by a lossy compression technique is disclosed. The method applies to data compressed with lossy algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as integer indices having redundancy and uncertainty in value by one unit. Indices which are adjacent in value are manipulated to encode auxiliary data. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user. Lossy compression methods use loss-less compressions known also as entropy coding, to reduce to the final size the intermediate representation as indices. The efficiency of the compression entropy coding, known also as entropy coding is increased by manipulating the indices at the intermediate stage in the manner taught by the method. 11 figs.

  12. Compression embedding

    DOE Patents [OSTI]

    Sandford, II, Maxwell T.; Handel, Theodore G.; Bradley, Jonathan N.

    1998-01-01

    A method of embedding auxiliary information into the digital representation of host data created by a lossy compression technique. The method applies to data compressed with lossy algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as integer indices having redundancy and uncertainty in value by one unit. Indices which are adjacent in value are manipulated to encode auxiliary data. By a substantially reverse process, the embedded auxiliary data can be retrieved easily by an authorized user. Lossy compression methods use loss-less compressions known also as entropy coding, to reduce to the final size the intermediate representation as indices. The efficiency of the compression entropy coding, known also as entropy coding is increased by manipulating the indices at the intermediate stage in the manner taught by the method.

  13. Sector 9

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

    Sector 9 About Science and Research Beamlines Operations and Schedule Safety Search APS ... Search Argonne Home > Advanced Photon Source > Contacts Advisory Committee Beamlines...

  14. A direct numerical simulation-based investigation and modeling of pressure Hessian effects on compressible velocity gradient dynamics

    SciTech Connect (OSTI)

    Danish, Mohammad Suman, Sawan Srinivasan, Balaji

    2014-12-15

    The pressure Hessian tensor plays a key role in shaping the behavior of the velocity gradient tensor, and in turn, that of many incumbent non-linear processes in a turbulent flow field. In compressible flows, the role of pressure Hessian is even more important because it represents the level of fluid-thermodynamic coupling existing in the flow field. In this work, we first perform a direct numerical simulation-based study to clearly identify, isolate, and understand various important inviscid mechanisms that govern the evolution of the pressure Hessian tensor in compressible turbulence. The ensuing understanding is then employed to introduce major improvements to the existing Lagrangian model of the pressure Hessian tensor (the enhanced Homogenized Euler equation or EHEE) in terms of (i) non-symmetric, non-isentropic effects and (ii) improved representation of the anisotropic portion of the pressure Hessian tensor. Finally, we evaluate the new model extensively by comparing the new model results against known turbulence behavior over a range of Reynolds and Mach numbers. Indeed, the new model shows much improved performance as compared to the EHEE model.

  15. Investigation of the dynamic stress–strain response of compressible polymeric foam using a non-parametric analysis

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

    Koohbor, Behrad; Kidane, Addis; Lu, Wei -Yang; Sutton, Michael A.

    2016-01-25

    Dynamic stress–strain response of rigid closed-cell polymeric foams is investigated in this work by subjecting high toughness polyurethane foam specimens to direct impact with different projectile velocities and quantifying their deformation response with high speed stereo-photography together with 3D digital image correlation. The measured transient displacement field developed in the specimens during high stain rate loading is used to calculate the transient axial acceleration field throughout the specimen. A simple mathematical formulation based on conservation of mass is also proposed to determine the local change of density in the specimen during deformation. By obtaining the full-field acceleration and density distributions,more » the inertia stresses at each point in the specimen are determined through a non-parametric analysis and superimposed on the stress magnitudes measured at specimen ends to obtain the full-field stress distribution. Furthermore, the process outlined above overcomes a major challenge in high strain rate experiments with low impedance polymeric foam specimens, i.e. the delayed equilibrium conditions can be quantified.« less

  16. THE EFFECT OF REPEATED COMPRESSIVE DYNAMIC LOADING ON THE STRESS-INDUCED MARTENSITIC TRANSFORMATION IN NiTi SHAPE MEMORY ALLOYS

    SciTech Connect (OSTI)

    D. MILLER; W. THISSELL; ET AL

    2000-08-01

    It has been shown that quasi-static, cyclic, isothermal mechanical loading influences the mechanical response of the stress-induced martensitic transformation in fully annealed NiTi Shape Memory Alloys (SMAs). As the cycle number increases, hardening of the stress-strain response during the martensitic phase transformation is seen along with a decrease in the threshold stress for initiation of stress-induced martensite. Also, the amount of plastic strain and detwinned martensitic strain decreases as the cycle number increases. However, NiTi SMAs have not been experimentally explored under high compressive strain rates. This research explores the cyclic near-adiabatic stress-induced martensitic loading using a Split Hopkinskin Pressure Bar (SHPB). The results of the dynamic loading tests are presented with emphasis on the loading rate, stress-strain response, specimen temperature and post-test microstructural evaluation. The results from the high strain rate tests show similarities with the quasi-static results in the hardening of the stress-strain response and shifting of the threshold stress for initiation of stress-induced martensite.

  17. Advances in compressible turbulent mixing

    SciTech Connect (OSTI)

    Dannevik, W.P.; Buckingham, A.C.; Leith, C.E.

    1992-01-01

    This volume includes some recent additions to original material prepared for the Princeton International Workshop on the Physics of Compressible Turbulent Mixing, held in 1988. Workshop participants were asked to emphasize the physics of the compressible mixing process rather than measurement techniques or computational methods. Actual experimental results and their meaning were given precedence over discussions of new diagnostic developments. Theoretical interpretations and understanding were stressed rather than the exposition of new analytical model developments or advances in numerical procedures. By design, compressibility influences on turbulent mixing were discussed--almost exclusively--from the perspective of supersonic flow field studies. The papers are arranged in three topical categories: Foundations, Vortical Domination, and Strongly Coupled Compressibility. The Foundations category is a collection of seminal studies that connect current study in compressible turbulent mixing with compressible, high-speed turbulent flow research that almost vanished about two decades ago. A number of contributions are included on flow instability initiation, evolution, and transition between the states of unstable flow onset through those descriptive of fully developed turbulence. The Vortical Domination category includes theoretical and experimental studies of coherent structures, vortex pairing, vortex-dynamics-influenced pressure focusing. In the Strongly Coupled Compressibility category the organizers included the high-speed turbulent flow investigations in which the interaction of shock waves could be considered an important source for production of new turbulence or for the enhancement of pre-existing turbulence. Individual papers are processed separately.

  18. Compressed Natural Gas and Hydrogen Fuels Workshop | Department of Energy

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

    Compressed Natural Gas and Hydrogen Fuels Workshop Compressed Natural Gas and Hydrogen Fuels Workshop Fuel experts from China, India, and the United States shared lessons learned about deploying CNG- and hydrogen-fueled vehicles in public transit fleets and the consumer sector at the Compressed Natural Gas and Hydrogen Fuels: Lessons Learned for the Safe Deployment of Vehicles workshop. The U.S. Department of Energy (DOE) and the U.S. Department of Transportation (DOT) hosted the workshop on

  19. Nonlinear compressions in merging plasma jets

    SciTech Connect (OSTI)

    Messer, S.; Case, A.; Wu, L.; Brockington, S.; Witherspoon, F. D.

    2013-03-15

    We investigate the dynamics of merging supersonic plasma jets using an analytic model. The merging structures exhibit supersonic, nonlinear compressions which may steepen into full shocks. We estimate the distance necessary to form such shocks and the resulting jump conditions. These theoretical models are compared to experimental observations and simulated dynamics. We also use those models to extrapolate behavior of the jet-merging compressions in a Plasma Jet Magneto-Inertial Fusion reactor.

  20. Shock compression of precompressed deuterium (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    VA at www.ntis.gov. Here we report quasi-isentropic dynamic compression and thermodynamic characterization of solid, precompressed deuterium over an ultrafast time scale (< 100 ps)...

  1. Energy Analysis by Sector | Department of Energy

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

    Information Resources » Energy Analysis by Sector Energy Analysis by Sector Manufacturers often rely on energy-intensive technologies and processes. AMO conducts a range of analyses to explore energy use and trends by sector. Manufacturing Energy and Carbon Footprints Static Manufacturing Energy Sankey Diagrams Dynamic Manufacturing Energy Sankey Tool Energy & Environmental Profiles Bandwidth Studies Large Energy User Manufacturing Facilities by State MANUFACTURING ENERGY and carbon

  2. Compressive behavior of fine sand.

    SciTech Connect (OSTI)

    Martin, Bradley E.; Kabir, Md. E.; Song, Bo; Chen, Wayne

    2010-04-01

    The compressive mechanical response of fine sand is experimentally investigated. The strain rate, initial density, stress state, and moisture level are systematically varied. A Kolsky bar was modified to obtain uniaxial and triaxial compressive response at high strain rates. A controlled loading pulse allows the specimen to acquire stress equilibrium and constant strain-rates. The results show that the compressive response of the fine sand is not sensitive to strain rate under the loading conditions in this study, but significantly dependent on the moisture content, initial density and lateral confinement. Partially saturated sand is more compliant than dry sand. Similar trends were reported in the quasi-static regime for experiments conducted at comparable specimen conditions. The sand becomes stiffer as initial density and/or confinement pressure increases. The sand particle size become smaller after hydrostatic pressure and further smaller after dynamic axial loading.

  3. Conducting fiber compression tester

    DOE Patents [OSTI]

    DeTeresa, Steven J.

    1990-01-01

    The invention measures the resistance across a conductive fiber attached to a substrate place under a compressive load to determine the amount of compression needed to cause the fiber to fail.

  4. Microbunching and RF Compression

    SciTech Connect (OSTI)

    Venturini, M.; Migliorati, M.; Ronsivalle, C.; Ferrario, M.; Vaccarezza, C.

    2010-05-23

    Velocity bunching (or RF compression) represents a promising technique complementary to magnetic compression to achieve the high peak current required in the linac drivers for FELs. Here we report on recent progress aimed at characterizing the RF compression from the point of view of the microbunching instability. We emphasize the development of a linear theory for the gain function of the instability and its validation against macroparticle simulations that represents a useful tool in the evaluation of the compression schemes for FEL sources.

  5. Compressed gas manifold

    DOE Patents [OSTI]

    Hildebrand, Richard J.; Wozniak, John J.

    2001-01-01

    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.

  6. Electrochemical Hydrogen Compression (EHC)

    Broader source: Energy.gov [DOE]

    This presentation by Pinakin Patel and Ludwig Lipp of Fuel Cell Energy was given at the DOE Hydrogen Compression, Storage, and Dispensing Workshop on March 20, 2013.

  7. Chemical Sector Analysis | NISAC

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

    NISACChemical Sector Analysis content top Chemical Supply Chain Analysis Posted by Admin on Mar 1, 2012 in | Comments 0 comments Chemical Supply Chain Analysis NISAC has developed ...

  8. Commercial Sector Demand Module

    Gasoline and Diesel Fuel Update (EIA)

    the State Energy Data System (SEDS) historical commercial sector consumption, applying an additive correction term to ensure that simulated model results correspond to published...

  9. Fundamentals of Compressed Air Systems

    Broader source: Energy.gov [DOE]

    Find out how a compressed air system works and the benefits of optimal compressed air system performance. This initial class demonstrates how to compute the current cost of your plant's compressed...

  10. Compressible Astrophysics Simulation Code

    Energy Science and Technology Software Center (OSTI)

    2007-07-18

    This is an astrophysics simulation code involving a radiation diffusion module developed at LLNL coupled to compressible hydrodynamics and adaptive mesh infrastructure developed at LBNL. One intended application is to neutrino diffusion in core collapse supernovae.

  11. Image compression technique

    DOE Patents [OSTI]

    Fu, C.Y.; Petrich, L.I.

    1997-03-25

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace`s equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image. 16 figs.

  12. Image compression technique

    DOE Patents [OSTI]

    Fu, Chi-Yung; Petrich, Loren I.

    1997-01-01

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace's equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image.

  13. Minimize Compressed Air Leaks | Department of Energy

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

    Compressed Air Leaks Minimize Compressed Air Leaks This tip sheet outlines a strategy for compressed air leak detection and provides a formula for cost savings calculations. COMPRESSED AIR TIP SHEET #3 PDF icon Minimize Compressed Air Leaks (August 2004) More Documents & Publications Eliminate Inappropriate Uses of Compressed Air Determine the Cost of Compressed Air for Your Plant Analyzing Your Compressed Air System

  14. Static Sankey Diagram Full Sector Manufacturing | Department of Energy

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

    Full Sector Manufacturing Static Sankey Diagram Full Sector Manufacturing The U.S. Manufacturing Sector Static Sankey diagram shows how total primary energy is used by U.S. manufacturing plants. Click on the Onsite Generation, Process Energy or Nonprocess Energy thumbnails below the diagram to see further detail on energy flows in manufacturing. Also, see the Dynamic Manufacturing Energy Sankey Tool to pan, zoom, and customize the manufacturing Sankey data and compare energy consumption across

  15. Private Sector Outreach and Partnerships

    Office of Energy Efficiency and Renewable Energy (EERE)

    ISER’s partnerships with the private sector are a strength which has enabled the division to respond to the needs of the sector and the nation.

  16. Isentropic Compression of Argon

    SciTech Connect (OSTI)

    H. Oona; J.C. Solem; L.R. Veeser, C.A. Ekdahl; P.J. Rodriquez; S.M. Younger; W. Lewis; W.D. Turley

    1997-08-01

    We are studying the transition of argon from an insulator to a conductor by compressing the frozen gas isentropically to pressures at which neighboring atomic orbitals overlap sufficiently to allow some electron motion between atoms. Argon and the other rare gases have closed electron shells and therefore remain montomic, even when they solidify. Their simple structure makes it likely that any measured change in conductivity is due to changes in the atomic structure, not in molecular configuration. As the crystal is compressed the band gap closes, allowing increased conductivity. We have begun research to determine the conductivity at high pressures, and it is our intention to determine the compression at which the crystal becomes a metal.

  17. Residential Multi-Function Gas Heat Pump: Efficient Engine-Driven Heat Pump for the Residential Sector- Fact Sheet, 2013

    Broader source: Energy.gov [DOE]

    Fact sheet overview of a natural gas heat pump system for the residential sector that will incorporate an internal combustion engine that drives a vapor-compression heat pump

  18. Dynamic

    Office of Legacy Management (LM)

    Dynamic , and Static , Res.ponse of the Government Oil Shale Mine at ' , . , Rifle, Colorado, to the Rulison Event. , . ; . . DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. p ( y c - - a 2-1 0 -4- REPORT AT (29-2) 914 USBM 1 0 0 1 UNITED STATES DEPARTMENT O F THE I NTERIOR BUREAU OF MINES e s.09 P. L. R U S S E L L RESEARCH D l RECTOR Februory 2, lB7O DYNAMIC AND STATIC RESPONSE 'OF THE GOVERNMENT

  19. Solar Dynamics | Open Energy Information

    Open Energy Info (EERE)

    Dynamics Jump to: navigation, search Name: Solar Dynamics Place: Ottumwa, Iowa Zip: IA 52501 Sector: Solar Product: Solar Dynamics is a US-based solar powered attic roof vents...

  20. Soil Machine Dynamics Ltd | Open Energy Information

    Open Energy Info (EERE)

    Machine Dynamics Ltd Jump to: navigation, search Name: Soil Machine Dynamics Ltd Region: United Kingdom Sector: Marine and Hydrokinetic Website: http: This company is listed in the...

  1. Dynamic Worldwide Solar Energy | Open Energy Information

    Open Energy Info (EERE)

    Worldwide Solar Energy Jump to: navigation, search Name: Dynamic Worldwide Solar Energy Sector: Solar Product: US-based solar developer and financer. References: Dynamic Worldwide...

  2. Buildings Sector Working Group

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

    July 22, 2013 AEO2014 Model Development For discussion purposes only Not for citation Overview Builldings Working Group Forrestal 2E-069 / July 22, 2013 2 * Residential projects - RECS update - Lighting model - Equipment, shell subsidies - ENERGY STAR benchmarking - Housing stock formation and decay * Commercial projects - Major end-use capacity factors - Hurdle rates - ENERGY STAR buildings * Both sectors - Consumer behavior workshop - Comparisons to STEO - AER  MER - Usual annual updates -

  3. Process Intensification - Chemical Sector Focus

    Energy Savers [EERE]

    Process Intensification - Chemical Sector Focus 1 Technology Assessment 2 Contents 3 1. ......... 5 5 2.1 Chemical Industry Focus ......

  4. Residential Demand Sector Data, Commercial Demand Sector Data, Industrial Demand Sector Data - Annual Energy Outlook 2006

    SciTech Connect (OSTI)

    2009-01-18

    Tables describing consumption and prices by sector and census division for 2006 - includes residential demand, commercial demand, and industrial demand

  5. PHELIX for flux compression studies

    SciTech Connect (OSTI)

    Turchi, Peter J; Rousculp, Christopher L; Reinovsky, Robert E; Reass, William A; Griego, Jeffrey R; Oro, David M; Merrill, Frank E

    2010-06-28

    PHELIX (Precision High Energy-density Liner Implosion eXperiment) is a concept for studying electromagnetic implosions using proton radiography. This approach requires a portable pulsed power and liner implosion apparatus that can be operated in conjunction with an 800 MeV proton beam at the Los Alamos Neutron Science Center. The high resolution (< 100 micron) provided by proton radiography combined with similar precision of liner implosions driven electromagnetically can permit close comparisons of multi-frame experimental data and numerical simulations within a single dynamic event. To achieve a portable implosion system for use at high energy-density in a proton laboratory area requires sub-megajoule energies applied to implosions only a few cms in radial and axial dimension. The associated inductance changes are therefore relatively modest, so a current step-up transformer arrangement is employed to avoid excessive loss to parasitic inductances that are relatively large for low-energy banks comprising only several capacitors and switches. We describe the design, construction and operation of the PHELIX system and discuss application to liner-driven, magnetic flux compression experiments. For the latter, the ability of strong magnetic fields to deflect the proton beam may offer a novel technique for measurement of field distributions near perturbed surfaces.

  6. Shock compression profiles in ceramics

    SciTech Connect (OSTI)

    Grady, D.E.; Moody, R.L.

    1996-03-01

    An investigation of the shock compression properties of high-strength ceramics has been performed using controlled planar impact techniques. In a typical experimental configuration, a ceramic target disc is held stationary, and it is struck by plates of either a similar ceramic or by plates of a well-characterized metal. All tests were performed using either a single-stage propellant gun or a two-stage light-gas gun. Particle velocity histories were measured with laser velocity interferometry (VISAR) at the interface between the back of the target ceramic and a calibrated VISAR window material. Peak impact stresses achieved in these experiments range from about 3 to 70 GPa. Ceramics tested under shock impact loading include: Al{sub 2}O{sub 3}, AlN, B{sub 4}C, SiC, Si{sub 3}N{sub 4}, TiB{sub 2}, WC and ZrO{sub 2}. This report compiles the VISAR wave profiles and experimental impact parameters within a database-useful for response model development, computational model validation studies, and independent assessment of the physics of dynamic deformation on high-strength, brittle solids.

  7. Magnetic compression laser driving circuit

    DOE Patents [OSTI]

    Ball, Don G. (Livermore, CA); Birx, Dan (Brentwood, CA); Cook, Edward G. (Livermore, CA)

    1993-01-01

    A magnetic compression laser driving circuit is disclosed. The magnetic compression laser driving circuit compresses voltage pulses in the range of 1.5 microseconds at 20 Kilovolts of amplitude to pulses in the range of 40 nanoseconds and 60 Kilovolts of amplitude. The magnetic compression laser driving circuit includes a multi-stage magnetic switch where the last stage includes a switch having at least two turns which has larger saturated inductance with less core material so that the efficiency of the circuit and hence the laser is increased.

  8. Magnetic compression laser driving circuit

    DOE Patents [OSTI]

    Ball, D.G.; Birx, D.; Cook, E.G.

    1993-01-05

    A magnetic compression laser driving circuit is disclosed. The magnetic compression laser driving circuit compresses voltage pulses in the range of 1.5 microseconds at 20 kilovolts of amplitude to pulses in the range of 40 nanoseconds and 60 kilovolts of amplitude. The magnetic compression laser driving circuit includes a multi-stage magnetic switch where the last stage includes a switch having at least two turns which has larger saturated inductance with less core material so that the efficiency of the circuit and hence the laser is increased.

  9. General Compression | Open Energy Information

    Open Energy Info (EERE)

    Newton, Massachusetts Zip: 2458 Product: Massachusetts-based developer of compressed air energy storage systems. Coordinates: 43.996685, -87.803724 Show Map Loading map......

  10. Population attribute compression

    DOE Patents [OSTI]

    White, James M.; Faber, Vance; Saltzman, Jeffrey S.

    1995-01-01

    An image population having a large number of attributes is processed to form a display population with a predetermined smaller number of attributes that represent the larger number of attributes. In a particular application, the color values in an image are compressed for storage in a discrete look-up table (LUT). Color space containing the LUT color values is successively subdivided into smaller volumes until a plurality of volumes are formed, each having no more than a preselected maximum number of color values. Image pixel color values can then be rapidly placed in a volume with only a relatively few LUT values from which a nearest neighbor is selected. Image color values are assigned 8 bit pointers to their closest LUT value whereby data processing requires only the 8 bit pointer value to provide 24 bit color values from the LUT.

  11. Edge compression manifold apparatus

    SciTech Connect (OSTI)

    Renzi, Ronald F.

    2004-12-21

    A manifold for connecting external capillaries to the inlet and/or outlet ports of a microfluidic device for high pressure applications is provided. The fluid connector for coupling at least one fluid conduit to a corresponding port of a substrate that includes: (i) a manifold comprising one or more channels extending therethrough wherein each channel is at least partially threaded, (ii) one or more threaded ferrules each defining a bore extending therethrough with each ferrule supporting a fluid conduit wherein each ferrule is threaded into a channel of the manifold, (iii) a substrate having one or more ports on its upper surface wherein the substrate is positioned below the manifold so that the one or more ports is aligned with the one or more channels of the manifold, and (iv) device to apply an axial compressive force to the substrate to couple the one or more ports of the substrate to a corresponding proximal end of a fluid conduit.

  12. Edge compression manifold apparatus

    SciTech Connect (OSTI)

    Renzi, Ronald F.

    2007-02-27

    A manifold for connecting external capillaries to the inlet and/or outlet ports of a microfluidic device for high pressure applications is provided. The fluid connector for coupling at least one fluid conduit to a corresponding port of a substrate that includes: (i) a manifold comprising one or more channels extending therethrough wherein each channel is at least partially threaded, (ii) one or more threaded ferrules each defining a bore extending therethrough with each ferrule supporting a fluid conduit wherein each ferrule is threaded into a channel of the manifold, (iii) a substrate having one or more ports on its upper surface wherein the substrate is positioned below the manifold so that the one or more ports is aligned with the one or more channels of the manifold, and (iv) device to apply an axial compressive force to the substrate to couple the one or more ports of the substrate to a corresponding proximal end of a fluid conduit.

  13. Behavioral Assumptions Underlying California Residential Sector...

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

    Behavioral Assumptions Underlying California Residential Sector Energy Efficiency Programs (2009 CIEE Report) Behavioral Assumptions Underlying California Residential Sector Energy ...

  14. Advanced Vehicle Electrification & Transportation Sector Electrificati...

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

    & Transportation Sector Electrification Advanced Vehicle Electrification & Transportation Sector Electrification 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies ...

  15. Energy Sector Cybersecurity Framework Implementation Guidance

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

    FOR PUBLIC COMMENT SEPTEMBER, 2014 ENERGY SECTOR CYBERSECURITY FRAMEWORK IMPLEMENTATION GUIDANCE Energy Sector Cybersecurity Framework Implementation Guidance Table of Contents...

  16. Energy Sector Market Analysis

    SciTech Connect (OSTI)

    Arent, D.; Benioff, R.; Mosey, G.; Bird, L.; Brown, J.; Brown, E.; Vimmerstedt, L.; Aabakken, J.; Parks, K.; Lapsa, M.; Davis, S.; Olszewski, M.; Cox, D.; McElhaney, K.; Hadley, S.; Hostick, D.; Nicholls, A.; McDonald, S.; Holloman, B.

    2006-10-01

    This paper presents the results of energy market analysis sponsored by the Department of Energy's (DOE) Weatherization and International Program (WIP) within the Office of Energy Efficiency and Renewable Energy (EERE). The analysis was conducted by a team of DOE laboratory experts from the National Renewable Energy Laboratory (NREL), Oak Ridge National Laboratory (ORNL), and Pacific Northwest National Laboratory (PNNL), with additional input from Lawrence Berkeley National Laboratory (LBNL). The analysis was structured to identify those markets and niches where government can create the biggest impact by informing management decisions in the private and public sectors. The analysis identifies those markets and niches where opportunities exist for increasing energy efficiency and renewable energy use.

  17. Sector Collaborative on Energy Efficiency

    SciTech Connect (OSTI)

    none,

    2008-06-01

    Helps stakeholders identify and act on cost-effective opportunities for expanding energy efficiency resources in the hospitality, retail, commercial real estate, grocery, and municipal sectors.

  18. Cross-sector Demand Response

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

    & Events Skip navigation links Smart Grid Demand Response Agricultural Residential Demand Response Commercial & Industrial Demand Response Cross-sector Demand Response...

  19. United States Industrial Sector Energy End Use Analysis

    SciTech Connect (OSTI)

    Shehabi, Arman; Morrow, William R.; Masanet, Eric

    2012-05-11

    The United States Department of Energys (DOE) Energy Information Administration (EIA) conducts the Manufacturing Energy Consumption Survey (MECS) to provide detailed data on energy consumption in the manufacturing sector. The survey is a sample of approximately 15,000 manufacturing establishments selected from the Economic Census - Manufacturing Sector. MECS provides statistics on the consumption of energy by end uses (e.g., boilers, process, electric drives, etc.) disaggregated by North American Industry Classification System (NAICS) categories. The manufacturing sector (NAICS Sector 31-33) consists of all manufacturing establishments in the 50 States and the District of Columbia. According to the NAICS, the manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical transformation of materials, substances, or components into new products. The establishments are physical facilities such as plants, factories, or mills. For many of the sectors in the MECS datasets, information is missing because the reported energy use is less than 0.5 units or BTUs, or is withheld to avoid disclosing data for individual establishments, or is withheld because the standard error is greater than 50%. We infer what the missing information likely are using several approximations techniques. First, much of the missing data can be easily calculated by adding or subtracting other values reported by MECS. If this is not possible (e.g. two data are missing), we look at historic MECS reports to help identify the breakdown of energy use in the past and assume it remained the same for the current MECS. Lastly, if historic data is also missing, we assume that 3 digit NAICS classifications predict energy use in their 4, 5, or 6 digit NAICS sub-classifications, or vice versa. Along with addressing data gaps, end use energy is disaggregated beyond the specified MECS allocations using additional industry specific energy consumption data. The result is a completed table of energy end use by sector with mechanical drives broken down by pumps, fans, compressed air, and drives.

  20. Spectroscopic Evidence for Negative Electronic Compressibility...

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

    Spectroscopic Evidence for Negative Electronic Compressibility in a Quasi-three-dimensional Spin-orbit Correlated Metal Tuesday, June 30, 2015 Negative compressibility is a sign of...

  1. Compressed Air Storage Strategies | Department of Energy

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

    PDF icon Compressed Air Storage Strategies (August 2004) More Documents & Publications Compressed Air System Control Strategies Stabilizing System Pressure Effect of Intake on ...

  2. Hydrogen Station Compression, Storage, and Dispensing Technical...

    Office of Scientific and Technical Information (OSTI)

    Subject: 08 HYDROGEN; 25 ENERGY STORAGE; 29 ENERGY PLANNING, POLICY AND ECONOMY HYDROGEN; COMPRESSION, STORAGE, AND DISPENSING; CSD; COMPRESSED NATURAL GAS; CNG; PIPELINE DELIVERY; ...

  3. Analyzing Your Compressed Air System; Industrial Technologies...

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

    Industry Training * Fundamentals of Compressed Air ... Compressed air needs are defned by the air quality and ... Plants with a fatter load profle can use simpler control ...

  4. Premix charge, compression ignition combustion system optimization...

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

    Premix charge, compression ignition combustion system optimization Premix charge, compression ignition combustion system optimization Presentation given at DEER 2006, August 20-24,...

  5. Compressed/Liquid Hydrogen Tanks

    Broader source: Energy.gov [DOE]

    Currently, DOE's physical hydrogen storage R&D focuses on the development of high-pressure (10,000 psi) composite tanks, cryo-compressed tanks, conformable tanks, and other advanced concepts...

  6. Compressed gas fuel storage system

    DOE Patents [OSTI]

    Wozniak, John J.; Tiller, Dale B.; Wienhold, Paul D.; Hildebrand, Richard J.

    2001-01-01

    A compressed gas vehicle fuel storage system comprised of a plurality of compressed gas pressure cells supported by shock-absorbing foam positioned within a shape-conforming container. The container is dimensioned relative to the compressed gas pressure cells whereby a radial air gap surrounds each compressed gas pressure cell. The radial air gap allows pressure-induced expansion of the pressure cells without resulting in the application of pressure to adjacent pressure cells or physical pressure to the container. The pressure cells are interconnected by a gas control assembly including a thermally activated pressure relief device, a manual safety shut-off valve, and means for connecting the fuel storage system to a vehicle power source and a refueling adapter. The gas control assembly is enclosed by a protective cover attached to the container. The system is attached to the vehicle with straps to enable the chassis to deform as intended in a high-speed collision.

  7. Microsoft Word - Negative_compressibility

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

    compressibility (NEC) in a three dimensional spin-orbit correlated metal (Sr 1-x La x ) 3 Ir 2 O 7 , utilizing the high-resolution angle- resolved photoemission spectroscopy...

  8. Isentropic Compression of LX-04 on the Z Accelerator

    SciTech Connect (OSTI)

    Reisman, D.B.; Forbes, J.W.; Tarver, C.M.; Garcia, F.; Cauble, R.C.; Hall, C.A.; Asay, J.R.

    2001-06-07

    Three sets of LX-04 samples of 0.18 and 0.49 mm nominal thicknesses were all dynamically loaded by Sandia's Z-accelerator with a ramp compression wave with a 200 ns rise time and about 150 kb peak stress. The LX-04/lithium fluoride samples interface velocities were measured using VISAR's. Comparisons of experimental and computational results will be given. Compression and release isentropes both show some reaction and kinetic behavior of the LX-04. Experiments were also performed on fine-grained TATB. Future experiments on single crystals of HMX that are designed to measure the phase transition at high pressures will be discussed.

  9. Isentropic Compression of LX-04 on the Z Accelerator

    SciTech Connect (OSTI)

    Reisman, D B; Forbes, J W; Tarver, C M; Garcia, F; Cauble, R C; Hall, C A; Asay, J R

    2001-06-07

    Three sets of LX-04 samples of 0.18 and 0.49 mm nominal thicknesses were all dynamically loaded by Sandia's Z-accelerator with a ramp compression wave with a 200 ns rise time and about 150 kb peak stress. The LX-04/lithium fluoride samples interface velocities were measured using VISAR's. Comparisons of experimental and computational results are given. Compression and release isentropes both show some reaction and kinetic behavior of the LX-04. Experiments were also performed on fine-grained TATB. Future experiments on single crystals of HMX that are designed to measure the phase transition at high pressures is discussed.

  10. Static Sankey Diagram of Process Energy in U.S. Manufacturing Sector |

    Energy Savers [EERE]

    Department of Energy Nonprocess Energy in U.S. Manufacturing Sector Static Sankey Diagram of Nonprocess Energy in U.S. Manufacturing Sector The Nonprocess Energy Static Sankey diagram shows how energy is used for supporting functions by U.S. manufacturing plants. Click on the Full Sector, Onsite Generation, and Process Energy thumbnails below the diagram to see further detail on energy flows in manufacturing. Also, see the Dynamic Manufacturing Energy Sankey Tool to pan, zoom, and customize

  11. Static Sankey Diagram of Nonprocess Energy in U.S. Manufacturing Sector |

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

    Department of Energy Nonprocess Energy in U.S. Manufacturing Sector Static Sankey Diagram of Nonprocess Energy in U.S. Manufacturing Sector The Nonprocess Energy Static Sankey diagram shows how energy is used for supporting functions by U.S. manufacturing plants. Click on the Full Sector, Onsite Generation, and Process Energy thumbnails below the diagram to see further detail on energy flows in manufacturing. Also, see the Dynamic Manufacturing Energy Sankey Tool to pan, zoom, and customize

  12. WINDExchange: Wind Energy Market Sectors

    Wind Powering America (EERE)

    Market Sectors Printable Version Bookmark and Share Utility-Scale Wind Distributed Wind Motivations for Buying Wind Power Buying Wind Power Selling Wind Power Wind Energy Market Sectors U.S. power plants generate electricity for homes, factories, and businesses from a variety of resources, including coal, hydro, natural gas, nuclear, petroleum, and (non-hydro) renewable resources such as wind and solar energy. This power generation mix varies significantly across the country depending on

  13. Property:DeploymentSector | Open Energy Information

    Open Energy Info (EERE)

    search Property Name DeploymentSector Property Type String Description Depolyment Sector as used in cleanenergysolutions.org Allows the following values: Commercial...

  14. Technologies for Climate Change Mitigation: Transport Sector...

    Open Energy Info (EERE)

    Technologies for Climate Change Mitigation: Transport Sector Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Technologies for Climate Change Mitigation: Transport Sector...

  15. Energy Sector Cybersecurity Framework Implementation Guidance

    Energy Savers [EERE]

    JANUARY 2015 ENERGY SECTOR CYBERSECURITY FRAMEWORK IMPLEMENTATION GUIDANCE U.S. DEPARTMENT OF ENERGY OFFICE OF ELECTRICITY DELIVERY AND ENERGY RELIABILITY Energy Sector ...

  16. Compressing the Inert Doublet Model

    SciTech Connect (OSTI)

    Blinov, Nikita; Morrissey, David E.; de la Puente, Alejandro

    2015-10-29

    The Inert Doublet Model relies on a discrete symmetry to prevent couplings of the new scalars to Standard Model fermions. We found that this stabilizes the lightest inert state, which can then contribute to the observed dark matter density. In the presence of additional approximate symmetries, the resulting spectrum of exotic scalars can be compressed. Here, we study the phenomenological and cosmological implications of this scenario. Furthermore, we derive new limits on the compressed Inert Doublet Model from LEP, and outline the prospects for exclusion and discovery of this model at dark matter experiments, the LHC, and future colliders.

  17. Compressive passive millimeter wave imager

    DOE Patents [OSTI]

    Gopalsami, Nachappa; Liao, Shaolin; Elmer, Thomas W; Koehl, Eugene R; Heifetz, Alexander; Raptis, Apostolos C

    2015-01-27

    A compressive scanning approach for millimeter wave imaging and sensing. A Hadamard mask is positioned to receive millimeter waves from an object to be imaged. A subset of the full set of Hadamard acquisitions is sampled. The subset is used to reconstruct an image representing the object.

  18. Hige Compression Ratio Turbo Gasoline Engine Operation Using Alcohol Enhancement

    SciTech Connect (OSTI)

    Heywood, John; Jo, Young Suk; Lewis, Raymond; Bromberg, Leslie; Heywood, John

    2015-10-31

    The overall objective of this project was to quantify the potential for improving the performance and efficiency of gasoline engine technology by use of alcohols to suppress knock. Knock-free operation is obtained by direct injection of a second “anti-knock” fuel such as ethanol, which suppresses knock when, with gasoline fuel, knock would occur. Suppressing knock enables increased turbocharging, engine downsizing, and use of higher compression ratios throughout the engine’s operating map. This project combined engine testing and simulation to define knock onset conditions, with different mixtures of gasoline and alcohol, and with this information quantify the potential for improving the efficiency of turbocharged gasoline spark-ignition engines, and the on-vehicle fuel consumption reductions that could then be realized. The more focused objectives of this project were therefore to: Determine engine efficiency with aggressive turbocharging and downsizing and high compression ratio (up to a compression ratio of 13.5:1) over the engine’s operating range; Determine the knock limits of a turbocharged and downsized engine as a function of engine speed and load; Determine the amount of the knock-suppressing alcohol fuel consumed, through the use of various alcohol-gasoline and alcohol-water gasoline blends, for different driving cycles, relative to the gasoline consumed; Determine implications of using alcohol-boosted engines, with their higher efficiency operation, in both light-duty and medium-duty vehicle sectors.

  19. ADVANCED RECIPROCATING COMPRESSION TECHNOLOGY (ARCT)

    SciTech Connect (OSTI)

    Danny M. Deffenbaugh; Klaus Brun; Ralph E. Harris; J. Pete Harrell; Robert J. Mckee; J. Jeffrey Moore; Steven J. Svedeman; Anthony J. Smalley; Eugene L. Broerman; Robert A Hart; Marybeth G. Nored; Ryan S. Gernentz; Shane P. Siebenaler

    2005-12-01

    The U.S. natural gas pipeline industry is facing the twin challenges of increased flexibility and capacity expansion. To meet these challenges, the industry requires improved choices in gas compression to address new construction and enhancement of the currently installed infrastructure. The current fleet of installed reciprocating compression is primarily slow-speed integral machines. Most new reciprocating compression is and will be large, high-speed separable units. The major challenges with the fleet of slow-speed integral machines are: limited flexibility and a large range in performance. In an attempt to increase flexibility, many operators are choosing to single-act cylinders, which are causing reduced reliability and integrity. While the best performing units in the fleet exhibit thermal efficiencies between 90% and 92%, the low performers are running down to 50% with the mean at about 80%. The major cause for this large disparity is due to installation losses in the pulsation control system. In the better performers, the losses are about evenly split between installation losses and valve losses. The major challenges for high-speed machines are: cylinder nozzle pulsations, mechanical vibrations due to cylinder stretch, short valve life, and low thermal performance. To shift nozzle pulsation to higher orders, nozzles are shortened, and to dampen the amplitudes, orifices are added. The shortened nozzles result in mechanical coupling with the cylinder, thereby, causing increased vibration due to the cylinder stretch mode. Valve life is even shorter than for slow speeds and can be on the order of a few months. The thermal efficiency is 10% to 15% lower than slow-speed equipment with the best performance in the 75% to 80% range. The goal of this advanced reciprocating compression program is to develop the technology for both high speed and low speed compression that will expand unit flexibility, increase thermal efficiency, and increase reliability and integrity. Retrofit technologies that address the challenges of slow-speed integral compression are: (1) optimum turndown using a combination of speed and clearance with single-acting operation as a last resort; (2) if single-acting is required, implement infinite length nozzles to address nozzle pulsation and tunable side branch absorbers for 1x lateral pulsations; and (3) advanced valves, either the semi-active plate valve or the passive rotary valve, to extend valve life to three years with half the pressure drop. This next generation of slow-speed compression should attain 95% efficiency, a three-year valve life, and expanded turndown. New equipment technologies that address the challenges of large-horsepower, high-speed compression are: (1) optimum turndown with unit speed; (2) tapered nozzles to effectively reduce nozzle pulsation with half the pressure drop and minimization of mechanical cylinder stretch induced vibrations; (3) tunable side branch absorber or higher-order filter bottle to address lateral piping pulsations over the entire extended speed range with minimal pressure drop; and (4) semi-active plate valves or passive rotary valves to extend valve life with half the pressure drop. This next generation of large-horsepower, high-speed compression should attain 90% efficiency, a two-year valve life, 50% turndown, and less than 0.75 IPS vibration. This program has generated proof-of-concept technologies with the potential to meet these ambitious goals. Full development of these identified technologies is underway. The GMRC has committed to pursue the most promising enabling technologies for their industry.

  20. Advanced Management of Compressed Air Systems

    Broader source: Energy.gov [DOE]

    Find out how a compressed air system works and the benefits of optimal compressed air system performance. This training is designed to help end users as well as industry solution providers learn...

  1. Assessment of the Market for Compressed Air Efficiency Services

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

    14 Characteristics of Compressed Air Systems 14 Compressed Air System Management 17 Customer Knowledge of Compressed Air System Energy Use and Efficiency Opportunities 18 ...

  2. Cryo-Compressed Hydrogen Storage: Performance and Cost Review...

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

    Compressed Hydrogen Storage: Performance and Cost Review Cryo-Compressed Hydrogen Storage: Performance and Cost Review Presented at the R&D Strategies for Compressed, ...

  3. Improving Compressed Air System Performance Third Edition | Department...

    Energy Savers [EERE]

    Compressed Air System Performance Third Edition Improving Compressed Air System Performance Third Edition PDF icon Improving Compressed Air Sourcebook version 3.pdf More Documents ...

  4. Preventive Maintenance Strategies for Compressed Air Systems

    Broader source: Energy.gov [DOE]

    This tip sheet discusses preventive maintenance strategies for compressed air systems to avoid high equipment repair and replacement costs.

  5. Compressed Air Systems | Department of Energy

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

    Technical Assistance » Compressed Air Systems Compressed Air Systems Applying best energy management practices and purchasing energy-efficient equipment can lead to significant savings in compressed air systems. Use the software tools, training, and publications listed below to improve performance and save energy. Compressed Air Tools Tools to Assess Your Energy System AIRMaster+ Tool AIRMaster+ LogTool Qualified Specialists Qualified Specialists have passed a rigorous competency examination on

  6. Gaseous Hydrogen Compression | Department of Energy

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

    » Gaseous Hydrogen Compression Gaseous Hydrogen Compression Hydrogen is typically produced at relatively low pressures (20-30 bar) and must be compressed prior to transport. Most compressors used today for gaseous hydrogen compression are either positive displacement compressors or centrifugal compressors. Positive displacement compressors can be reciprocating or rotary. Reciprocating compressors use a motor with a linear drive to move a piston or a diaphragm back and forth. This motion

  7. Sector Profiles of Significant Large CHP Markets, March 2004

    Broader source: Energy.gov [DOE]

    Overview of market assessments of large CHP sector profiles of the chemicals, food, and pharmaceuticals sectors

  8. Compressed air energy storage system

    DOE Patents [OSTI]

    Ahrens, Frederick W.; Kartsounes, George T.

    1981-01-01

    An internal combustion reciprocating engine is operable as a compressor during slack demand periods utilizing excess power from a power grid to charge air into an air storage reservoir and as an expander during peak demand periods to feed power into the power grid utilizing air obtained from the air storage reservoir together with combustible fuel. Preferably the internal combustion reciprocating engine is operated at high pressure and a low pressure turbine and compressor are also employed for air compression and power generation.

  9. Compressed air energy storage system

    DOE Patents [OSTI]

    Ahrens, F.W.; Kartsounes, G.T.

    An internal combustion reciprocating engine is operable as a compressor during slack demand periods utilizing excess power from a power grid to charge air into an air storage reservoir and as an expander during peak demand periods to feed power into the power grid utilizing air obtained from the air storage reservoir together with combustion reciprocating engine is operated at high pressure and a low pressure turbine and compressor are also employed for air compression and power generation.

  10. Combined local-density and dynamical mean field theory calculations...

    Office of Scientific and Technical Information (OSTI)

    field theory calculations for the compressed lanthanides Ce, Pr, and Nd Citation Details In-Document Search Title: Combined local-density and dynamical mean field theory ...

  11. HelioDynamics Ltd | Open Energy Information

    Open Energy Info (EERE)

    HelioDynamics Ltd Jump to: navigation, search Name: HelioDynamics Ltd Place: Cambridge, United Kingdom Zip: CB23 2SH Sector: Solar Product: Manufactures the HD211 product - a solar...

  12. The screening of 4f moments and delocalization in the compressed light rare

    Office of Scientific and Technical Information (OSTI)

    earths (Journal Article) | SciTech Connect The screening of 4f moments and delocalization in the compressed light rare earths Citation Details In-Document Search Title: The screening of 4f moments and delocalization in the compressed light rare earths Spin and charge susceptibilities and the 4f{sup n}, 4f{sup n{+-}1} configuration weights are calculated for compressed Ce (n=1), Pr (n=2), and Nd (n=3) metals using dynamical mean field theory combined with the local-density approximation. At

  13. Chapter 22: Compressed Air Evaluation Protocol

    SciTech Connect (OSTI)

    Benton, N.

    2014-11-01

    Compressed-air systems are used widely throughout industry for many operations, including pneumatic tools, packaging and automation equipment, conveyors, and other industrial process operations. Compressed-air systems are defined as a group of subsystems composed of air compressors, air treatment equipment, controls, piping, pneumatic tools, pneumatically powered machinery, and process applications using compressed air. A compressed-air system has three primary functional subsystems: supply, distribution, and demand. Air compressors are the primary energy consumers in a compressed-air system and are the primary focus of this protocol. The two compressed-air energy efficiency measures specifically addressed in this protocol are: high-efficiency/variable speed drive (VSD) compressor replacing modulating compressor; compressed-air leak survey and repairs. This protocol provides direction on how to reliably verify savings from these two measures using a consistent approach for each.

  14. Water Impacts of the Electricity Sector (Presentation)

    SciTech Connect (OSTI)

    Macknick, J.

    2012-06-01

    This presentation discusses the water impacts of the electricity sector. Nationally, the electricity sector is a major end-user of water. Water issues affect power plants throughout the nation.

  15. Multi-Sector General Permit (MSGP)

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

    MSGP Multi-Sector General Permit (MSGP) The Multi-Sector General Permit authorizes the discharge of stormwater associated with industrial activity. What's New Documents submitted to EPRR in last 30 Days TBD What is the Multi-Sector General Permit? Storm water discharges from EPA specified industrial activities are regulated under the National Pollutant Discharge Elimination System (NPDES) Multi-Sector General Permit (MSGP). LANL regulated industrial activities include: Metal fabrication Power

  16. Accelerating Investments in the Geothermal Sector, Indonesia...

    Open Energy Info (EERE)

    Accelerating Investments in the Geothermal Sector, Indonesia (Presentation) Author Paul Brophy Conference World Geothermal Energy Summit; Jakarta, Indonesia; 20120706...

  17. SEP Special Projects Report: Buildings Sector

    SciTech Connect (OSTI)

    2009-01-18

    The buildings section of this Sharing Success document describes SEP special projects in the buildings sector including funding.

  18. Advanced Vehicle Electrification and Transportation Sector Electrifica...

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

    Advanced Vehicle Electrification and Transportation Sector Electrification Plug-in Hybrid (PHEV) Vehicle Technology Advancement and Demonstration Activity Advanced Vehicle...

  19. Energy Efficiency and the Finance Sector | Open Energy Information

    Open Energy Info (EERE)

    and the Finance Sector Jump to: navigation, search Name Energy Efficiency and the Finance Sector AgencyCompany Organization United Nations Environment Programme Sector Energy...

  20. Nepal-Sectoral Climate Impacts Economic Assessment | Open Energy...

    Open Energy Info (EERE)

    Nepal-Sectoral Climate Impacts Economic Assessment (Redirected from Nepal Sectoral Climate impacts Economic Assessment) Jump to: navigation, search Name Nepal Sectoral Climate...

  1. Non-Vapor Compression HVAC Technologies Report

    Broader source: Energy.gov [DOE]

    While vapor-compression technologies have served heating, ventilation, and air-conditioning (HVAC) needs very effectively, and have been the dominant HVAC technology for close to 100 years, the conventional refrigerants used in vapor-compression equipment contribute to global climate change when released to the atmosphere. The Building Technologies Office is evaluating low-global warming potential (GWP) alternatives to vapor-compression technologies.

  2. Eccentric crank variable compression ratio mechanism

    DOE Patents [OSTI]

    Lawrence, Keith Edward; Moser, William Elliott; Roozenboom, Stephan Donald; Knox, Kevin Jay

    2008-05-13

    A variable compression ratio mechanism for an internal combustion engine that has an engine block and a crankshaft is disclosed. The variable compression ratio mechanism has a plurality of eccentric disks configured to support the crankshaft. Each of the plurality of eccentric disks has at least one cylindrical portion annularly surrounded by the engine block. The variable compression ratio mechanism also has at least one actuator configured to rotate the plurality of eccentric disks.

  3. Hydrogen Compression, Storage, and Dispensing Cost Reduction...

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

    Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Addendum Document states additional feedback on the worksop received via a request for information issued in ...

  4. Training: Compressed Air Systems | Department of Energy

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

    ... This training includes classroom instruction, a practical exam testing hands-on ... previously completed the CAC Advanced Management of Compressed Air Systems course as a ...

  5. Case Study - Compressed Natural Gas Refuse Fleets

    SciTech Connect (OSTI)

    Laughlin, M; Burnham, A.

    2014-02-01

    This case study explores the use of heavy-duty refuse trucks fueled by compressed natural gas highlighting three fleets from very different types of organizations.

  6. Compressing turbulence to improve inertial confinement fusion...

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

    surprising positive impact of turbulence on inertial confinement fusion (ICF) experiments. ... In a Z-pinch and other inertial confinement (ICF) machines, plasma is compressed to create ...

  7. Compressed Air System Control Strategies; Industrial Technologies...

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

    Using controls, storage, and demand management to ... at part-load is key to a high performance compressed air system. ... A STRONG ENERGY PORTFOLIO FOR A STRONG AMERICA ...

  8. Optimization of Storage vs. Compression Capacity

    Broader source: Energy.gov [DOE]

    This presentation by Amgad Elgowainy of Argonne National Laboratory was given at the DOE Hydrogen Compression, Storage, and Dispensing Workshop in March 2013.

  9. Electric energy sector in Argentina

    SciTech Connect (OSTI)

    Bastos, C.M.

    1994-06-01

    This article describes how the organization of the electric energy sector in Argentina has changed dramatically from a sector in which state-owned companies worked under a central planning to one in which private companies make their own decisions. The way that the electrical system used to work can be shown by these statements: demand growth estimated by central planning team; projects to be developed and the timetable determined by the same team; unit operations ruled by central dispatch, and under state-owned companies responsibility; integration with neighbor countries focused on physical projects, such as Salto Grande with Uruguay and Yacyreta with Paraguay. Today the electrical system works under these rules: the system has been vertically separated and the companies cannot be integrated; electric energy is considered as an ordinary wealth and the value that consumers give it is taken into account, (the distribution companies pay consumers a penalty for the energy that they cannot supply, the penalty is worth the economic damage consumers suffer due to its lack); producers have to compete for demand. They can sell in two ways: sell under private agreements or sell to the system. Both ways of selling compete with each other because the system buys giving priority to lower costs and, as a consequence, some of the producers do not sell at all.

  10. Shock compression of liquid hydrazine

    SciTech Connect (OSTI)

    Garcia, B.O.; Chavez, D.J.

    1995-01-01

    Liquid hydrazine (N{sub 2}H{sub 4}) is a propellant used by the Air Force and NASA for aerospace propulsion and power systems. Because the propellant modules that contain the hydrazine can be subject to debris impacts during their use, the shock states that can occur in the hydrazine need to be characterized to safely predict its response. Several shock compression experiments have been conducted in an attempt to investigate the detonability of liquid hydrazine; however, the experiments results disagree. Therefore, in this study, we reproduced each experiment numerically to evaluate in detail the shock wave profiles generated in the liquid hydrazine. This paper presents the results of each numerical simulation and compares the results to those obtained in experiment. We also present the methodology of our approach, which includes chemical kinetic experiments, chemical equilibrium calculations, and characterization of the equation of state of liquid hydrazine.

  11. Compression molding of aerogel microspheres

    DOE Patents [OSTI]

    Pekala, R.W.; Hrubesh, L.W.

    1998-03-24

    An aerogel composite material produced by compression molding of aerogel microspheres (powders) mixed together with a small percentage of polymer binder to form monolithic shapes in a cost-effective manner is disclosed. The aerogel composites are formed by mixing aerogel microspheres with a polymer binder, placing the mixture in a mold and heating under pressure, which results in a composite with a density of 50--800 kg/m{sup 3} (0.05--0.80 g/cc). The thermal conductivity of the thus formed aerogel composite is below that of air, but higher than the thermal conductivity of monolithic aerogels. The resulting aerogel composites are attractive for applications such as thermal insulation since fabrication thereof does not require large and expensive processing equipment. In addition to thermal insulation, the aerogel composites may be utilized for filtration, ICF target, double layer capacitors, and capacitive deionization. 4 figs.

  12. Compression molding of aerogel microspheres

    DOE Patents [OSTI]

    Pekala, Richard W.; Hrubesh, Lawrence W.

    1998-03-24

    An aerogel composite material produced by compression molding of aerogel microspheres (powders) mixed together with a small percentage of polymer binder to form monolithic shapes in a cost-effective manner. The aerogel composites are formed by mixing aerogel microspheres with a polymer binder, placing the mixture in a mold and heating under pressure, which results in a composite with a density of 50-800 kg/m.sup.3 (0.05-0.80 g/cc). The thermal conductivity of the thus formed aerogel composite is below that of air, but higher than the thermal conductivity of monolithic aerogels. The resulting aerogel composites are attractive for applications such as thermal insulation since fabrication thereof does not require large and expensive processing equipment. In addition to thermal insulation, the aerogel composites may be utilized for filtration, ICF target, double layer capacitors, and capacitive deionization.

  13. Determining the Right Air Quality for Your Compressed Air System - Compressed Air Tip Sheet #5

    SciTech Connect (OSTI)

    2004-08-01

    BestPractices Program tip sheet discussing how to determine the right air quality for compressed air systems.

  14. R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent...

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

    Argonne National Laboratory Cryo-Compression Systems Development Status, Salvador Aceves, Lawrence Livermore National Laboratory Sorption Storage Technology Summary, Richard ...

  15. Survey of data compression techniques

    SciTech Connect (OSTI)

    Gryder, R.; Hake, K.

    1991-09-01

    PM-AIM must provide to customers in a timely fashion information about Army acquisitions. This paper discusses ways that PM-AIM can reduce the volume of data that must be transmitted between sites. Although this paper primarily discusses techniques of data compression, it also briefly discusses other options for meeting the PM-AIM requirements. The options available to PM-AIM, in addition to hardware and software data compression, include less-frequent updates, distribution of partial updates, distributed data base design, and intelligent network design. Any option that enhances the performance of the PM-AIM network is worthy of consideration. The recommendations of this paper apply to the PM-AIM project in three phases: the current phase, the target phase, and the objective phase. Each recommendation will be identified as (1) appropriate for the current phase, (2) considered for implementation during the target phase, or (3) a feature that should be part of the objective phase of PM-AIM's design. The current phase includes only those measures that can be taken with the installed leased lines. The target phase includes those measures that can be taken in transferring the traffic from the leased lines to the DSNET environment with minimal changes in the current design. The objective phase includes all the things that should be done as a matter of course. The objective phase for PM-AIM appears to be a distributed data base with data for each site stored locally and all sites having access to all data.

  16. Survey of data compression techniques

    SciTech Connect (OSTI)

    Gryder, R.; Hake, K.

    1991-09-01

    PM-AIM must provide to customers in a timely fashion information about Army acquisitions. This paper discusses ways that PM-AIM can reduce the volume of data that must be transmitted between sites. Although this paper primarily discusses techniques of data compression, it also briefly discusses other options for meeting the PM-AIM requirements. The options available to PM-AIM, in addition to hardware and software data compression, include less-frequent updates, distribution of partial updates, distributed data base design, and intelligent network design. Any option that enhances the performance of the PM-AIM network is worthy of consideration. The recommendations of this paper apply to the PM-AIM project in three phases: the current phase, the target phase, and the objective phase. Each recommendation will be identified as (1) appropriate for the current phase, (2) considered for implementation during the target phase, or (3) a feature that should be part of the objective phase of PM-AIM`s design. The current phase includes only those measures that can be taken with the installed leased lines. The target phase includes those measures that can be taken in transferring the traffic from the leased lines to the DSNET environment with minimal changes in the current design. The objective phase includes all the things that should be done as a matter of course. The objective phase for PM-AIM appears to be a distributed data base with data for each site stored locally and all sites having access to all data.

  17. Compressed natural gas (CNG) measurement

    SciTech Connect (OSTI)

    Husain, Z.D.; Goodson, F.D.

    1995-12-01

    The increased level of environmental awareness has raised concerns about pollution. One area of high attention is the internal combustion engine. The internal combustion engine in and of itself is not a major pollution threat. However, the vast number of motor vehicles in use release large quantities of pollutants. Recent technological advances in ignition and engine controls coupled with unleaded fuels and catalytic converters have reduced vehicular emissions significantly. Alternate fuels have the potential to produce even greater reductions in emissions. The Natural Gas Vehicle (NGV) has been a significant alternative to accomplish the goal of cleaner combustion. Of the many alternative fuels under investigation, compressed natural gas (CNG) has demonstrated the lowest levels of emission. The only vehicle certified by the State of California as an Ultra Low Emission Vehicle (ULEV) was powered by CNG. The California emissions tests of the ULEV-CNG vehicle revealed the following concentrations: Non-Methane Hydrocarbons 0.005 grams/mile Carbon Monoxide 0.300 grams/mile Nitrogen Oxides 0.040 grams/mile. Unfortunately, CNG vehicles will not gain significant popularity until compressed natural gas is readily available in convenient locations in urban areas and in proximity to the Interstate highway system. Approximately 150,000 gasoline filling stations exist in the United States while number of CNG stations is about 1000 and many of those CNG stations are limited to fleet service only. Discussion in this paper concentrates on CNG flow measurement for fuel dispensers. Since the regulatory changes and market demands affect the flow metering and dispenser station design those aspects are discussed. The CNG industry faces a number of challenges.

  18. A New Approach for Fingerprint Image Compression

    SciTech Connect (OSTI)

    Mazieres, Bertrand

    1997-12-01

    The FBI has been collecting fingerprint cards since 1924 and now has over 200 million of them. Digitized with 8 bits of grayscale resolution at 500 dots per inch, it means 2000 terabytes of information. Also, without any compression, transmitting a 10 Mb card over a 9600 baud connection will need 3 hours. Hence we need a compression and a compression as close to lossless as possible: all fingerprint details must be kept. A lossless compression usually do not give a better compression ratio than 2:1, which is not sufficient. Compressing these images with the JPEG standard leads to artefacts which appear even at low compression rates. Therefore the FBI has chosen in 1993 a scheme of compression based on a wavelet transform, followed by a scalar quantization and an entropy coding : the so-called WSQ. This scheme allows to achieve compression ratios of 20:1 without any perceptible loss of quality. The publication of the FBI specifies a decoder, which means that many parameters can be changed in the encoding process: the type of analysis/reconstruction filters, the way the bit allocation is made, the number of Huffman tables used for the entropy coding. The first encoder used 9/7 filters for the wavelet transform and did the bit allocation using a high-rate bit assumption. Since the transform is made into 64 subbands, quite a lot of bands receive only a few bits even at an archival quality compression rate of 0.75 bit/pixel. Thus, after a brief overview of the standard, we will discuss a new approach for the bit-allocation that seems to make more sense where theory is concerned. Then we will talk about some implementation aspects, particularly for the new entropy coder and the features that allow other applications than fingerprint image compression. Finally, we will compare the performances of the new encoder to those of the first encoder.

  19. Bunch length compression method for free electron lasers to avoid parasitic compressions

    SciTech Connect (OSTI)

    Douglas, David R.; Benson, Stephen; Nguyen, Dinh Cong; Tennant, Christopher; Wilson, Guy

    2015-05-26

    A method of bunch length compression method for a free electron laser (FEL) that avoids parasitic compressions by 1) applying acceleration on the falling portion of the RF waveform, 2) compressing using a positive momentum compaction (R.sub.56>0), and 3) compensating for aberration by using nonlinear magnets in the compressor beam line.

  20. Hardware compression using common portions of data

    DOE Patents [OSTI]

    Chang, Jichuan; Viswanathan, Krishnamurthy

    2015-03-24

    Methods and devices are provided for data compression. Data compression can include receiving a plurality of data chunks, sampling at least some of the plurality of data chunks extracting a common portion from a number of the plurality of data chunks based on the sampling, and storing a remainder of the plurality of data chunks in memory.

  1. Utah Clean Cities Transportation Sector Petroleum Reduction Technologi...

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

    More Documents & Publications Utah Clean Cities Transportation Sector Petroleum Reduction Technologies Program Utah Clean Cities Transportation Sector Petroleum Reduction ...

  2. Single-Sector Supersymmetry Breaking, Chirality, and Unification

    SciTech Connect (OSTI)

    Behbahani, Siavosh R.; Craig, Nathaniel; Torroba, Gonzalo; /SLAC /Stanford U., Phys. Dept.

    2011-08-12

    Calculable single-sector models provide an elegant framework for generating the flavor textures via compositeness, breaking supersymmetry, and explaining the electroweak scale. Such models may be realized naturally in supersymmetric QCD with additional gauge singlets (SSQCD), though it remains challenging to construct models without a surfeit of light exotic states where the Standard Model index emerges naturally. We classify possible single-sector models based on Sp confining SSQCD according to their Standard Model index and number of composite messengers. This leads to simple, calculable models that spontaneously break supersymmetry, reproduce the fermion flavor hierarchy, and explain the Standard Model index dynamically with little or no additional matter. At low energies these theories realize a 'more minimal' soft spectrum with direct mediation and a gravitino LSP.

  3. Prospects for achieving high dynamic compression with low energy...

    Office of Scientific and Technical Information (OSTI)

    Number: W-7405-ENG-48 Resource Type: Journal Article Resource Relation: Journal Name: Applied Physics Letters, vol. 101, na, September 5, 2012, pp. 101904 Research Org: Lawrence...

  4. Chapter 2: Energy Sectors and Systems

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

    2: Energy Sectors and Systems September 2015 Quadrennial Technology Review 2 Energy Sectors and Systems Issues and RDD&D Opportunities Energy systems are becoming increasingly interconnected and complex. Integrated energy systems present both opportunities for performance improvement as well as risks to operability and security. The size and scope of these opportunities and risks are just beginning to be understood. This chapter addresses both the key issues of energy sectors and their

  5. DOE Issues Energy Sector Cyber Organization NOI

    Energy Savers [EERE]

    Issues National Energy Sector Cyber Organization Notice of Intent February 11, 2010 The Department of Energy's (DOE) National Energy Technology Laboratory (NETL) announced on Jan. 7 that it intends to issue a Funding Opportunity Announcement (FOA) for a National Energy Sector Cyber Organization, envisioned as a partnership between the federal government and energy sector stakeholders to protect the bulk power electric grid and aid the integration of smart grid technology to enhance the security

  6. Modeling Distributed Generation in the Buildings Sectors

    Reports and Publications (EIA)

    2013-01-01

    This report focuses on how the Energy Information Administrationmodels residential and commercial sector distributed generation, including combined heat and power, for the Annual Energy Outlook.

  7. Energy Sector Cybersecurity Framework Implementation Guidance...

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

    In February 2014, the National Institute of Standards and Technology (NIST) released a Cybersecurity Framework. DOE has collaborated with private sector stakeholders through the ...

  8. Property:Sector | Open Energy Information

    Open Energy Info (EERE)

    is a property of type Page. Subproperties This property has the following 1 subproperty: G Green Economy Toolbox Pages using the property "Sector" Showing 25 pages using this...

  9. Category:Public Sectors | Open Energy Information

    Open Energy Info (EERE)

    no pages or media. Retrieved from "http:en.openei.orgwindex.php?titleCategory:PublicSectors&oldid272249" Feedback Contact needs updating Image needs updating...

  10. Model Documentation Report: Commercial Sector Demand Module...

    Gasoline and Diesel Fuel Update (EIA)

    the State Energy Data System (SEDS) historical commercial sector consumption, applying an additive correction term to ensure that simulated model results correspond to published...

  11. Energy Sector Cybersecurity Framework Implementation Guidance...

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

    Department released guidance to help the energy sector establish or align existing cybersecurity risk management programs to meet the objectives of the Cybersecurity Framework...

  12. Draft Energy Sector Cybersecurity Framework Implementation Guidance...

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

    in the Federal Register, inviting the public to comment on DOE's Energy Sector Cybersecurity Framework Implementation Guidance. Comments must be received on or before October...

  13. Energy Sector Cybersecurity Framework Implementation Guidance...

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

    invites public comment on a draft of the Energy Sector Cybersecurity Framework Implementation Guidance. Comments must be received on or before October 14, 2014. The draft document...

  14. Federal Sector Renewable Energy Project Implementation: ""What...

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

    Federal Sector Renewable Energy Project Implementation: ""What's Working and Why Presentation by Robert Westby, National Renewable Energy Laboratory, at the Waste-to-Energy Using ...

  15. Weakly relativistic and ponderomotive effects on self-focusing and self-compression of laser pulses in near critical plasmas

    SciTech Connect (OSTI)

    Bokaei, B.; Niknam, A. R., E-mail: a-niknam@sbu.ac.ir [Laser and Plasma Research Institute, Shahid Beheshti University, G.C., Tehran (Iran, Islamic Republic of)

    2014-10-15

    The spatiotemporal dynamics of high power laser pulses in near critical plasmas are studied taking in to account the effects of relativistic and ponderomotive nonlinearities. First, within one-dimensional analysis, the effects of initial parameters such as laser intensity, plasma density, and plasma electron temperature on the self-compression mechanism are discussed. The results illustrate that the ponderomotive nonlinearity obstructs the relativistic self-compression above a certain intensity value. Moreover, the results indicate the existence of the turning point temperature in which the compression process has its strongest strength. Next, the three-dimensional analysis of laser pulse propagation is investigated by coupling the self-focusing equation with the self-compression one. It is shown that in contrast to the case in which the only relativistic nonlinearity is considered, in the presence of ponderomotive nonlinearity, the self-compression mechanism obstructs the self-focusing and leads to an increase of the laser spot size.

  16. Shock formation and the ideal shape of ramp compression waves

    SciTech Connect (OSTI)

    Swift, D C; Kraus, R G; Loomis, E; Hicks, D G; McNaney, J M; Johnson, R P

    2008-05-29

    We derive expressions for shock formation based on the local curvature of the flow characteristics during dynamic compression. Given a specific ramp adiabat, calculated for instance from the equation of state for a substance, the ideal nonlinear shape for an applied ramp loading history can be determined. We discuss the region affected by lateral release, which can be presented in compact form for the ideal loading history. Example calculations are given for representative metals and plastic ablators. Continuum dynamics (hydrocode) simulations were in good agreement with the algebraic forms. Example applications are presented for several classes of laser-loading experiment, identifying conditions where shocks are desired but not formed, and where long duration ramps are desired.

  17. General Compression Looks at Energy Storage from a Different Angle |

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

    Department of Energy General Compression Looks at Energy Storage from a Different Angle General Compression Looks at Energy Storage from a Different Angle February 3, 2011 - 3:36pm Addthis Image of the General Compression CAES system | courtesy of General Compression, Inc. Image of the General Compression CAES system | courtesy of General Compression, Inc. April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs Earlier this week, we told you about a new company

  18. Determining the Right Air Quality for Your Compressed Air System |

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

    Department of Energy the Right Air Quality for Your Compressed Air System Determining the Right Air Quality for Your Compressed Air System This tip sheet outlines the main factors for determining the right air quality for compressed air systems. COMPRESSED AIR TIP SHEET #5 PDF icon Determining the Right Air Quality for Your Compressed Air System (August 2004) More Documents & Publications Effect of Intake on Compressor Performance Improving Compressed Air System Performance: A Sourcebook

  19. Compressed Hydrogen Storage Workshop Agenda | Department of Energy

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

    Compressed Hydrogen Storage Workshop Agenda Compressed Hydrogen Storage Workshop Agenda Agenda for the first day of the R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops on February 14 and 15, 2011. PDF icon compressed_hydrogen2011_day1_agenda.pdf More Documents & Publications Cryogenic Hydrogen Storage Systems Workshop Agenda Research and Development Strategies for Compressed & Cryo-Hydrogen Storage Systems - Workshop Summary

  20. Compressive Shear Test to Accurately Measure Adhesion of PV Encapsulants |

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

    storage strategies. COMPRESSED AIR TIP SHEET #9 PDF icon Compressed Air Storage Strategies (August 2004) More Documents & Publications Compressed Air System Control Strategies Stabilizing System Pressure Effect of Intake on Compressor Performance

    system control strategies as a means to improving and maintaining system performance. COMPRESSED AIR TIP SHEET #7 PDF icon Compressed Air System Control Strategies (August 2004) More Documents & Publications Compressed Air Storage Strategies

  1. An efficient compression scheme for bitmap indices

    SciTech Connect (OSTI)

    Wu, Kesheng; Otoo, Ekow J.; Shoshani, Arie

    2004-04-13

    When using an out-of-core indexing method to answer a query, it is generally assumed that the I/O cost dominates the overall query response time. Because of this, most research on indexing methods concentrate on reducing the sizes of indices. For bitmap indices, compression has been used for this purpose. However, in most cases, operations on these compressed bitmaps, mostly bitwise logical operations such as AND, OR, and NOT, spend more time in CPU than in I/O. To speedup these operations, a number of specialized bitmap compression schemes have been developed; the best known of which is the byte-aligned bitmap code (BBC). They are usually faster in performing logical operations than the general purpose compression schemes, but, the time spent in CPU still dominates the total query response time. To reduce the query response time, we designed a CPU-friendly scheme named the word-aligned hybrid (WAH) code. In this paper, we prove that the sizes of WAH compressed bitmap indices are about two words per row for large range of attributes. This size is smaller than typical sizes of commonly used indices, such as a B-tree. Therefore, WAH compressed indices are not only appropriate for low cardinality attributes but also for high cardinality attributes.In the worst case, the time to operate on compressed bitmaps is proportional to the total size of the bitmaps involved. The total size of the bitmaps required to answer a query on one attribute is proportional to the number of hits. These indicate that WAH compressed bitmap indices are optimal. To verify their effectiveness, we generated bitmap indices for four different datasets and measured the response time of many range queries. Tests confirm that sizes of compressed bitmap indices are indeed smaller than B-tree indices, and query processing with WAH compressed indices is much faster than with BBC compressed indices, projection indices and B-tree indices. In addition, we also verified that the average query response time is proportional to the index size. This indicates that the compressed bitmap indices are efficient for very large datasets.

  2. Modulation compression for short wavelength harmonic generation

    SciTech Connect (OSTI)

    Qiang, J.

    2010-01-11

    Laser modulator is used to seed free electron lasers. In this paper, we propose a scheme to compress the initial laser modulation in the longitudinal phase space by using two opposite sign bunch compressors and two opposite sign energy chirpers. This scheme could potentially reduce the initial modulation wavelength by a factor of C and increase the energy modulation amplitude by a factor of C, where C is the compression factor of the first bunch compressor. Such a compressed energy modulation can be directly used to generate short wavelength current modulation with a large bunching factor.

  3. Logarithmic compression methods for spectral data

    DOE Patents [OSTI]

    Dunham, Mark E.

    2003-01-01

    A method is provided for logarithmic compression, transmission, and expansion of spectral data. A log Gabor transformation is made of incoming time series data to output spectral phase and logarithmic magnitude values. The output phase and logarithmic magnitude values are compressed by selecting only magnitude values above a selected threshold and corresponding phase values to transmit compressed phase and logarithmic magnitude values. A reverse log Gabor transformation is then performed on the transmitted phase and logarithmic magnitude values to output transmitted time series data to a user.

  4. Pressure Relief Devices for Compressed Hydrogen Vehicle Fuel...

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

    Pressure Relief Devices for Compressed Hydrogen Vehicle Fuel Containers Pressure Relief Devices for Compressed Hydrogen Vehicle Fuel Containers These slides were presented at the...

  5. HCCI in a Variable Compression Ratio Engine: Effects of Engine...

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

    in a Variable Compression Ratio Engine: Effects of Engine Variables HCCI in a Variable Compression Ratio Engine: Effects of Engine Variables 2004 Diesel Engine Emissions Reduction ...

  6. Generation of Coherent X-Ray Radiation through Modulation Compression...

    Office of Scientific and Technical Information (OSTI)

    Generation of Coherent X-Ray Radiation through Modulation Compression Citation Details In-Document Search Title: Generation of Coherent X-Ray Radiation through Modulation Compression ...

  7. Evaluation of the Compressed Air Challenge Training Program

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

    ... and compressed air system vendors with knowledge and tools required to effect ... Systems and 925 individuals had attended Advanced Management of Compressed Air Systems. ...

  8. Robust ferromagnetism in the compressed permanent magnet Sm 2...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Robust ferromagnetism in the compressed permanent magnet Sm 2 Co 17 Citation Details In-Document Search Title: Robust ferromagnetism in the compressed permanent ...

  9. Analyzing Your Compressed Air System | Department of Energy

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

    This tip sheet outlines the process to analyze industrial compressed air systems and ... More Documents & Publications Compressed Air System Control Strategies Determining the ...

  10. Determine the Cost of Compressed Air for Your Plant | Department...

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

    This tip sheet discusses a method for determining the cost of compressed air at industrial ... More Documents & Publications Compressed Air System Control Strategies Select an ...

  11. Guidelines for Selecting a Compressed Air System Service Provider...

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

    Guidelines for Selecting a Compressed Air System Service Provider Guidelines for Selecting a Compressed Air System Service Provider This publication is meant to help industrial ...

  12. Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons...

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

    Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons Learned for the Safe Deployment of Vehicles Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons Learned ...

  13. A Multicomponent Blend as a Diesel Fuel Surrogate for Compression...

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

    A Multicomponent Blend as a Diesel Fuel Surrogate for Compression Ignition Engine Applications Title A Multicomponent Blend as a Diesel Fuel Surrogate for Compression Ignition...

  14. Effect of Compression Ratio and Piston Geometry on RCCI load...

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

    Explores the effect of compression ratio and piston design on the practical load range of bio-fueled Reactivity Controlled Compression Ignition (RCCI) combustion. PDF icon ...

  15. Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder...

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

    Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder These slides were presented at the Onboard ...

  16. Onboard Type IV Compressed Hydrogen Storage System Cost Analysis...

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

    Onboard Type IV Compressed Hydrogen Storage System Cost Analysis Webinar Onboard Type IV Compressed Hydrogen Storage System Cost Analysis Webinar Access the recording and download ...

  17. 2013 Hydrogen Compression, Storage, and Dispensing Cost Reduction...

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

    Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Final Report 2013 Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Final Report ...

  18. Webinar February 25: Update to the 700 bar Compressed Hydrogen...

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

    February 25: Update to the 700 bar Compressed Hydrogen Storage System Cost Projection Webinar February 25: Update to the 700 bar Compressed Hydrogen Storage System Cost Projection ...

  19. POSTPONED: Webinar January 26: Update to the 700 bar Compressed...

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

    POSTPONED: Webinar January 26: Update to the 700 bar Compressed Hydrogen Storage System Cost Projection POSTPONED: Webinar January 26: Update to the 700 bar Compressed Hydrogen ...

  20. Webinar January 26: Update to the 700 bar Compressed Hydrogen...

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

    6: Update to the 700 bar Compressed Hydrogen Storage System Cost Projection Webinar January 26: Update to the 700 bar Compressed Hydrogen Storage System Cost Projection January 20, ...

  1. Shock compression of precompressed deuterium (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Conference: Shock compression of precompressed deuterium Citation Details In-Document Search Title: Shock compression of precompressed deuterium Here we report quasi-isentropic ...

  2. Characterization of Dual-Fuel Reactivity Controlled Compression...

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

    Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) Using Hydrated Ethanol and Diesel Fuel Characterization of Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) ...

  3. Rotary Vapor Compression Cycle Technology: A Pathway to Ultra...

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

    Rotary Vapor Compression Cycle Technology: A Pathway to Ultra-Efficient Air Conditioning, Heating and Refrigeration Rotary Vapor Compression Cycle Technology: A Pathway to...

  4. Two-Stage Variable Compression Ratio (VCR) System to Increase...

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

    Stage Variable Compression Ratio (VCR) System to Increase Efficiency in Gasoline Powertrains Two-Stage Variable Compression Ratio (VCR) System to Increase Efficiency in Gasoline ...

  5. Cryo-Compressed Hydrogen Storage: Performance and Cost Review

    Broader source: Energy.gov [DOE]

    Presented at the R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops on February 14 and 15, 2011.

  6. H2A Delivery: Forecourt Compression & Storage Optimization (Part...

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

    Delivery: Forecourt Compression & Storage Optimization (Part II) H2A Delivery: Forecourt Compression & Storage Optimization (Part II) Presentation by Matthew Hooks of TIAX at the...

  7. Compression set in Gas Blown Condensation Cured Polysiloxane...

    Office of Scientific and Technical Information (OSTI)

    Compression set in Gas Blown Condensation Cured Polysiloxane Elastomers Citation Details In-Document Search Title: Compression set in Gas Blown Condensation Cured Polysiloxane ...

  8. 2016 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...

    Energy Savers [EERE]

    - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas Applications 2016 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas ...

  9. Graphene physics and insulator-metal transition in compressed...

    Office of Scientific and Technical Information (OSTI)

    Graphene physics and insulator-metal transition in compressed hydrogen Title: Graphene physics and insulator-metal transition in compressed hydrogen Authors: Naumov, Ivan I. ; ...

  10. Advanced CFD Models for High Efficiency Compression Ignition...

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

    CFD Models for High Efficiency Compression Ignition Engines Advanced CFD Models for High Efficiency Compression Ignition Engines Advanced CFD models for high efficiency ...

  11. Business Case for Compressed Natural Gas in Municipal Fleets...

    Open Energy Info (EERE)

    Business Case for Compressed Natural Gas in Municipal Fleets Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Business Case for Compressed Natural Gas in Municipal Fleets...

  12. Guidelines for Conversion of Diesel Buses to Compressed Natural...

    Open Energy Info (EERE)

    Conversion of Diesel Buses to Compressed Natural Gas Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Guidelines for Conversion of Diesel Buses to Compressed Natural Gas...

  13. Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular...

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

    Cryo-Compressed Hydrogen Storage: Performance and Cost Review Technical Assessment of Cryo-Compressed Hydrogen Storage Tank Systems for Automotive Applications High-Pressure Tube ...

  14. Evaluation of the Compressed Air Challenge Training Program:...

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

    Evaluation of the Compressed Air Challenge Training Program: Final Report This is the final report on an evaluation of the Compressed Air Challenge (CAC) training program, which ...

  15. Improving Compressed Air System Performance: A Sourcebook for...

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

    Industry, Third Edition Improving Compressed Air System Performance: A Sourcebook for Industry, Third Edition AMO's "Improving Compressed Air System Performance: A Sourcebook for ...

  16. COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our...

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

    MBG Auditorium COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our Renewable Energy Future Mr. Al Cavallo Consultant Compressed air energy storage (CAES) is a proven, ...

  17. Compressed Air System Control Strategies | Department of Energy

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

    System Control Strategies Compressed Air System Control Strategies This tip sheet briefly discusses compressed air system control strategies as a means to improving and maintaining ...

  18. Open Issues in the Development of Safety Standards for Compressed...

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

    Issues in the Development of Safety Standards for Compressed Hydrogen Storage at SAE-International Open Issues in the Development of Safety Standards for Compressed Hydrogen...

  19. National Electric Sector Cybersecurity Organization Resource (NESCOR)

    SciTech Connect (OSTI)

    None, None

    2014-06-30

    The goal of the National Electric Sector Cybersecurity Organization Resource (NESCOR) project was to address cyber security issues for the electric sector, particularly in the near and mid-term. The following table identifies the strategies from the DOE Roadmap to Achieve Energy Delivery Systems Cybersecurity published in September 2011 that are applicable to the NESCOR project.

  20. Advanced Vehicle Electrification & Transportation Sector Electrification |

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

    Department of Energy 1 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation PDF icon arravt071_vss_cesiel_2011_o.pdf More Documents & Publications Advanced Vehicle Electrification and Transportation Sector Electrification Advanced Vehicle Electrification and Transportation Sector Electrification Plug-in Hybrid (PHEV) Vehicle Technology Advancement and Demonstration Activity

  1. CO2 Compression | netl.doe.gov

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

    psi to be transported via pipeline and then injected into an underground storage site. ... NETL-funded CO2 compression projects are shown in the table below. Carbon Capture Project ...

  2. Pulse compression and prepulse suppression apparatus

    DOE Patents [OSTI]

    Dane, Clifford B.; Hackel, Lloyd A.; George, Edward V.; Miller, John L.; Krupke, William F.

    1993-01-01

    A pulse compression and prepulse suppression apparatus (10) for time compressing the output of a laser (14). A pump pulse (46) is separated from a seed pulse (48) by a first polarized beam splitter (20) according to the orientation of a half wave plate (18). The seed pulse (48) is directed into an SBS oscillator (44) by two plane mirrors (22, 26) and a corner mirror (24), the corner mirror (24) being movable to adjust timing. The pump pulse (46) is directed into an SBS amplifier 34 wherein SBS occurs. The seed pulse (48), having been propagated from the SBS oscillator (44), is then directed through the SBS amplifier (34) wherein it sweeps the energy of the pump pulse (46) out of the SBS amplifier (34) and is simultaneously compressed, and the time compressed pump pulse (46) is emitted as a pulse output (52). A second polarized beam splitter (38) directs any undepleted pump pulse 58 away from the SBS oscillator (44).

  3. Pulse compression and prepulse suppression apparatus

    DOE Patents [OSTI]

    Dane, C.B.; Hackel, L.A.; George, E.V.; Miller, J.L.; Krupke, W.F.

    1993-11-09

    A pulse compression and prepulse suppression apparatus (10) for time compressing the output of a laser (14). A pump pulse (46) is separated from a seed pulse (48) by a first polarized beam splitter (20) according to the orientation of a half wave plate (18). The seed pulse (48) is directed into an SBS oscillator (44) by two plane mirrors (22, 26) and a corner mirror (24), the corner mirror (24) being movable to adjust timing. The pump pulse (46) is directed into an SBS amplifier 34 wherein SBS occurs. The seed pulse (48), having been propagated from the SBS oscillator (44), is then directed through the SBS amplifier (34) wherein it sweeps the energy of the pump pulse (46) out of the SBS amplifier (34) and is simultaneously compressed, and the time compressed pump pulse (46) is emitted as a pulse output (52). A second polarized beam splitter (38) directs any undepleted pump pulse 58 away from the SBS oscillator (44).

  4. High Efficiency Fuel Reactivity Controlled Compression Ignition...

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

    An optimized dual-fuel PCCI concept, RCCI, is proposed. PDF icon deer10reitz.pdf More Documents & Publications Effect of Compression Ratio and Piston Geometry on RCCI load limit ...

  5. Method for compression of binary data

    DOE Patents [OSTI]

    Berlin, Gary J.

    1996-01-01

    The disclosed method for compression of a series of data bytes, based on LZSS-based compression methods, provides faster decompression of the stored data. The method involves the creation of a flag bit buffer in a random access memory device for temporary storage of flag bits generated during normal LZSS-based compression. The flag bit buffer stores the flag bits separately from their corresponding pointers and uncompressed data bytes until all input data has been read. Then, the flag bits are appended to the compressed output stream of data. Decompression can be performed much faster because bit manipulation is only required when reading the flag bits and not when reading uncompressed data bytes and pointers. Uncompressed data is read using byte length instructions and pointers are read using word instructions, thus reducing the time required for decompression.

  6. Seneca Compressed Air Energy Storage (CAES) Project

    SciTech Connect (OSTI)

    2012-11-30

    This document provides specifications for the process air compressor for a compressed air storage project, requests a budgetary quote, and provides supporting information, including compressor data, site specific data, water analysis, and Seneca CAES value drivers.

  7. Method for compression of binary data

    DOE Patents [OSTI]

    Berlin, G.J.

    1996-03-26

    The disclosed method for compression of a series of data bytes, based on LZSS-based compression methods, provides faster decompression of the stored data. The method involves the creation of a flag bit buffer in a random access memory device for temporary storage of flag bits generated during normal LZSS-based compression. The flag bit buffer stores the flag bits separately from their corresponding pointers and uncompressed data bytes until all input data has been read. Then, the flag bits are appended to the compressed output stream of data. Decompression can be performed much faster because bit manipulation is only required when reading the flag bits and not when reading uncompressed data bytes and pointers. Uncompressed data is read using byte length instructions and pointers are read using word instructions, thus reducing the time required for decompression. 5 figs.

  8. Education Highlights: Gasoline Compression Ignition | Argonne National

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

    Laboratory Education Highlights: Gasoline Compression Ignition Share Description Argonne intern Kendyl Partridge from Mississippi State University worked with Argonne mentor Steve Ciatti of the Energy Systems division in studying gasoline compression ignition engines. This research will help engineers increase an engine's efficiency while reducing its environmental impact. Speakers Kendyl Partridge, Argonne National Laboratory Intern from Mississippi State University Duration 1:56 Topic

  9. Method and apparatus for signal compression

    DOE Patents [OSTI]

    Carangelo, R.M.

    1994-02-08

    The method and apparatus of the invention effects compression of an analog electrical signal (e.g., representing an interferogram) by introducing into it a component that is a cubic function thereof, normally as a nonlinear negative signal in a feedback loop of an Op Amp. The compressed signal will most desirably be digitized and then digitally decompressed so as to produce a signal that emulates the original. 8 figures.

  10. Method and apparatus for signal compression

    DOE Patents [OSTI]

    Carangelo, Robert M.

    1994-02-08

    The method and apparatus of the invention effects compression of an analog electrical signal (e.g., representing an interferogram) by introducing into it a component that is a cubic function thereof, normally as a nonlinear negative signal in a feedback loop of an Op Amp. The compressed signal will most desirably be digitized and then digitally decompressed so as to produce a signal that emulates the original.

  11. Lossy compression of weak lensing data

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

    Vanderveld, R. Ali; Bernstein, Gary M.; Stoughton, Chris; Rhodes, Jason; Massey, Richard; Dobke, Benjamin M.

    2011-07-12

    Future orbiting observatories will survey large areas of sky in order to constrain the physics of dark matter and dark energy using weak gravitational lensing and other methods. Lossy compression of the resultant data will improve the cost and feasibility of transmitting the images through the space communication network. We evaluate the consequences of the lossy compression algorithm of Bernstein et al. (2010) for the high-precision measurement of weak-lensing galaxy ellipticities. This square-root algorithm compresses each pixel independently, and the information discarded is by construction less than the Poisson error from photon shot noise. For simulated space-based images (without cosmicmore » rays) digitized to the typical 16 bits per pixel, application of the lossy compression followed by image-wise lossless compression yields images with only 2.4 bits per pixel, a factor of 6.7 compression. We demonstrate that this compression introduces no bias in the sky background. The compression introduces a small amount of additional digitization noise to the images, and we demonstrate a corresponding small increase in ellipticity measurement noise. The ellipticity measurement method is biased by the addition of noise, so the additional digitization noise is expected to induce a multiplicative bias on the galaxies measured ellipticities. After correcting for this known noise-induced bias, we find a residual multiplicative ellipticity bias of m {approx} -4 x 10-4. This bias is small when compared to the many other issues that precision weak lensing surveys must confront, and furthermore we expect it to be reduced further with better calibration of ellipticity measurement methods.« less

  12. Compressing bitmap indexes for faster search operations

    SciTech Connect (OSTI)

    Wu, Kesheng; Otoo, Ekow J.; Shoshani, Arie

    2002-04-25

    In this paper, we study the effects of compression on bitmap indexes. The main operations on the bitmaps during query processing are bitwise logical operations such as AND, OR, NOT, etc. Using the general purpose compression schemes, such as gzip, the logical operations on the compressed bitmaps are much slower than on the uncompressed bitmaps. Specialized compression schemes, like the byte-aligned bitmap code(BBC), are usually faster in performing logical operations than the general purpose schemes, but in many cases they are still orders of magnitude slower than the uncompressed scheme. To make the compressed bitmap indexes operate more efficiently, we designed a CPU-friendly scheme which we refer to as the word-aligned hybrid code (WAH). Tests on both synthetic and real application data show that the new scheme significantly outperforms well-known compression schemes at a modest increase in storage space. Compared to BBC, a scheme well-known for its operational efficiency, WAH performs logical operations about 12 times faster and uses only 60 percent more space. Compared to the uncompressed scheme, in most test cases WAH is faster while still using less space. We further verified with additional tests that the improvement in logical operation speed translates to similar improvement in query processing speed.

  13. Taiwan: An energy sector study

    SciTech Connect (OSTI)

    Johnson, T.; Fridley, D.; Kang, Wu

    1988-03-01

    A study on the economy of Taiwan, with special reference to the energy sector, revealed the following: Taiwan's rapid export-driven economic growth in the 1970s and 1980s has earned them the rank of ''Newly Industrialized Countries.'' Coal reserves measure less than 1 billion tons, and annual output has declined to below 2 million tons per year. Marginal amounts of crude are produced. Natural gas resources have been exploited both on- and offshore, through production amounts to little more than 1 billion cubic meters per year. Domestic hydrocarbon production is forecast to decline. Taiwan prssesses an estimated 5300 mW of exploitable hydropower capacity, of which 2564 mW had been installed by 1986. Taiwan has undertaken a massive program of nuclear power construction in response to the rapid rise in oil prices during the 1970s. Energy demand has risen an average of 9.0 percent per year since 1954, while real GNP has grown 8.6 percent per year. Sine 1980, oil has provided a lower share of total energy demand. Oil demand for transport has continued to grow rapidly. Declining production of domestic natural gas has led Taiwan to initiate LNG imports from Indonesia beginning in 1990. Coal has regained some of its earlier importance in Taiwan's energy structure. With declining domestic production, imports now provide nearly 90 percent of total coal demand. Taiwan is basically self-sufficient in refining capacity. Energy demand is expected to grow 5.4 percent per year through the yeat 2000. With declining output of domestic resources, energy dependency on imports will rise from its current 90 percent level. Government policy recognizes this external dependency and has directed it efforts at diversification of suppliers. 18 refs., 11 figs., 40 tabs.

  14. Forecourt Storage and Compression Options | Department of Energy

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

    Storage and Compression Options Forecourt Storage and Compression Options Presentation by Mark Richards on forecourt storage and compression options. PDF icon wkshp_storage_richards.pdf More Documents & Publications H2A Delivery: Forecourt Compression & Storage Optimization (Part II) H2A Delivery Models and Results Hydrogen Delivery Infrastructure Option Analysis

  15. Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications

    Broader source: Energy.gov [DOE]

    DOE technical assessment of cryo-compressed hydrogen storage for vehicular applications during 2006-2008.

  16. Market Report for the Industrial Sector, 2009

    SciTech Connect (OSTI)

    Sastri, Bhima; Brueske, Sabine; de los Reyes, Pamela; Jamison, Keith; Justiniano, Mauricio; Margolis, Nancy; Monfort, Joe; Raghunathan, Anand; Sabouni, Ridah

    2009-07-01

    This report provides an overview of trends in industrial-sector energy use. It focuses on some of the largest and most energy-intensive industrial subsectors and several emerging technologies that could transform key segments of industry.

  17. Federal Sector Renewable Energy Project Implementation: "What...

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

    Federal Sector Renewable Energy Project Implementation: "What's Working and Why" Implementation: What s Working and Why DOD-DOE Waste-to- Energy and Fuel Cell Workshop January 13, ...

  18. DOE Issues Energy Sector Cyber Organization NOI

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

    the federal government and energy sector stakeholders to protect the bulk power electric grid and aid the integration of smart grid technology to enhance the security of the grid. ...

  19. Single-shot measurements of plasmons in compressed diamond with an x-ray laser

    SciTech Connect (OSTI)

    Gamboa, E. J.; Fletcher, L. B.; Lee, H. J.; Galtier, E.; Gauthier, M.; Granados, E.; Hastings, J. B.; Glenzer, S. H.; Zastrau, U.; MacDonald, M. J.; Vorberger, J.; Gericke, D. O.

    2015-05-15

    Strong plasmon resonances characteristics of electron density fluctuations have recently been observed in dynamically compressed diamond for the first time at the Linac Coherent Light Source. These experiments observe the forward scattering spectra from 8 keV x-ray pulses at record peak brightness to probe laser-compressed diamond foils at the Matter in Extreme Conditions instrument. We demonstrate single-shot measurements of the x-ray scattering spectrum, which are sensitive to the temperatures and densities of the compressed samples. The inferred values from the inelastic scattering are compared to simulations, finding good agreement with the temperature and demonstrating the need to include solid state effects in the modeling of the plasmon oscillation.

  20. Video compression of coronary angiograms based on discrete wavelet transform with block classification

    SciTech Connect (OSTI)

    Ho, B.K.T.; Tsai, M.J.; Wei, J.; Ma, M.; Saipetch, P.

    1996-12-01

    A new method of video compression for angiographic images has been developed to achieve high compression ratio ({approximately}20:1) while eliminating block artifacts which leads to loss of diagnostic accuracy. This method adopts motion picture experts group`s (MPEG`s) motion compensated prediction to take advantage of frame to frame correlation. However, in contrast to MPEG, the error images arising from mismatches in the motion estimation are encoded by discrete wavelet transform (DWT) rather than block discrete cosine transform (DCT). Furthermore, the authors developed a classification scheme which label each block in an image as intra, error, or background type and encode it accordingly. This hybrid coding can significantly improve the compression efficiency in certain cases. This method can be generalized for any dynamic image sequences applications sensitive to block artifacts.

  1. Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    Natural Gas Printable Version Share this resource Send a link to Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas Fueling

  2. NREL: Energy Analysis: Electric Sector Integration

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

    Electric Sector Integration Integrating higher levels of renewable resources into the U.S. electricity system could pose challenges to the operability of the nation's grid. NREL's electric sector integration analysis work investigates the potential impacts of expanding renewable technology deployment on grid operations and infrastructure expansion including: Feasibility of higher levels of renewable electricity generation. Options for increasing electric system flexibility to accommodate higher

  3. Energy Sector Cybersecurity Framework Implementation Guidance | Department

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

    of Energy Cybersecurity Framework Implementation Guidance Energy Sector Cybersecurity Framework Implementation Guidance On January 8, 2015, the Energy Department released guidance to help the energy sector establish or align existing cybersecurity risk management programs to meet the objectives of the Cybersecurity Framework released by the National Institutes of Standards and Technology (NIST) in February 2014. The voluntary Cybersecurity Framework consists of standards, guidelines, and

  4. 2015 Energy Sector-Specific Plan | Department of Energy

    Energy Savers [EERE]

    Energy Sector-Specific Plan 2015 Energy Sector-Specific Plan The U.S. Department of Energy (DOE), as the Sector-Specific Agency for the Energy Sector, has worked closely with government and industry partners to develop the 2015 Energy Sector-Specific Plan (SSP). DOE conducted much of this work in collaboration with the Energy Sector Coordinating Councils (SCCs) and the Energy Government Coordinating Council (GCC). The Energy SCCs represent the interests of the Electricity and Oil and Natural Gas

  5. Energy Intensity Indicators: Indicators for Major Sectors | Department of

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

    Energy for Major Sectors Energy Intensity Indicators: Indicators for Major Sectors This system of energy intensity indicators for total energy covers the economy as a whole and each of the major end-use sectors - transportation, industry, commercial, and residential, as well as the electric power sector. These sectors are shown in Figure 1. Please go to the menu below the figure to see a more detailed discussion of historical trends in the energy intensity indicator for a particular sector.

  6. Roadmap to Secure Control Systems in the Energy Sector - January...

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

    Roadmap to Secure Control Systems in the Energy Sector - January 2006 Roadmap to Secure Control Systems in the Energy Sector - January 2006 This document, the Roadmap to Secure...

  7. Template:Energy Generation Facilities by Sector | Open Energy...

    Open Energy Info (EERE)

    Energy Generation Facilities by Sector Jump to: navigation, search This is the Energy Generation Facilities by Sector template. It will display energy generation facilities for the...

  8. Manufacturing Energy and Carbon Footprint - Sector: Iron and...

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

    - Sector: Iron and Steel (NAICS 3311, 3312), October 2012 (MECS 2006) Manufacturing Energy and Carbon Footprint - Sector: Iron and Steel (NAICS 3311, 3312), October 2012 (MECS ...

  9. LED Site Lighting in the Commercial Building Sector: Opportunities...

    Energy Savers [EERE]

    Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification LED Site Lighting in the Commercial Building Sector: ...

  10. Energy-Sector Stakeholders Attend the Department of Energy's...

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

    Energy-Sector Stakeholders Attend the Department of Energy's Cybersecurity for Energy Delivery Systems Peer Review Energy-Sector Stakeholders Attend the Department of Energy's ...

  11. Energy-Sector Stakeholders Attend the Department of Energy's...

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

    Energy-Sector Stakeholders Attend the Department of Energy's 2010 Cybersecurity for Energy Delivery Systems Peer Review Energy-Sector Stakeholders Attend the Department of Energy's 2010 ...

  12. List of Companies in Geothermal Sector | Open Energy Information

    Open Energy Info (EERE)

    Geothermal Sector Jump to: navigation, search Companies in the Geothermal energy sector: Add a Company Download CSV (rows 1-212) Map of Geothermal energy companies Loading map......

  13. EIA Energy Efficiency-Residential Sector Energy Intensities,...

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

    Residential Sector Energy Intensities RESIDENTIAL SECTOR ENERGY INTENSITIES: 1978-2005 Released Date: August 2004 Page Last Modified:June 2009 These tables provide estimates of...

  14. National and Sectoral GHG Mitigation Potential: A Comparison...

    Open Energy Info (EERE)

    and Sectoral GHG Mitigation Potential: A Comparison Across Models Jump to: navigation, search Tool Summary LAUNCH TOOL Name: National and Sectoral GHG Mitigation Potential: A...

  15. Climate Change: Risks and Opportunities for the Finance Sector...

    Open Energy Info (EERE)

    Finance Sector Online Course Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Climate Change: Risks and Opportunities for the Finance Sector Online Course Agency...

  16. OECD-Private Sector Engagement in Adaptation to Climate Change...

    Open Energy Info (EERE)

    Private Sector Engagement in Adaptation to Climate Change Jump to: navigation, search Tool Summary LAUNCH TOOL Name: OECD-Private Sector Engagement in Adaptation to Climate Change...

  17. Energy Critical Infrastructure and Key Resources Sector-Specific

    Energy Savers [EERE]

    Energy Critical Infrastructure and Key Resources Sector-Specific Plan as input to the National Infrastructure Protection Plan (Redacted) May 2007 Department of Energy Energy Sector ...

  18. Morocco-Low Carbon Development Planning in the Power Sector ...

    Open Energy Info (EERE)

    Low Carbon Development Planning in the Power Sector Jump to: navigation, search Logo: Morocco-Low Carbon Development Planning in the Power Sector Name Morocco-Low Carbon...

  19. Nigeria-Low Carbon Development Planning in the Power Sector ...

    Open Energy Info (EERE)

    Low Carbon Development Planning in the Power Sector Jump to: navigation, search Logo: Nigeria-Low Carbon Development Planning in the Power Sector Name Nigeria-Low Carbon...

  20. South Africa-Danish Government Sector Programmes | Open Energy...

    Open Energy Info (EERE)

    Sector Programmes Jump to: navigation, search Name South Africa-Danish Government Sector Programmes AgencyCompany Organization Danish Government Partner Danish Ministry for...

  1. Overcoming Multifamily Sector Barriers in Austin, Texas | Department...

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

    Overcoming Multifamily Sector Barriers in Austin, Texas Overcoming Multifamily Sector Barriers in Austin, Texas Presents techniques on overcoming the barriers of multifamily energy...

  2. Number of Large Energy User Manufacturing Facilities by Sector...

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

    Number of Large Energy User Manufacturing Facilities by Sector and State (with Industrial Energy Consumption by State and Manufacturing Energy Consumption by Sector) State...

  3. Renewable Energy Cross Sectoral Assessments Terms of Reference...

    Open Energy Info (EERE)

    Renewable Energy Cross Sectoral Assessments Terms of Reference Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Renewable Energy Cross Sectoral Assessments Terms of...

  4. Workforce Training for the Electric Power Sector | Department...

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

    Workforce Training for the Electric Power Sector Workforce Training for the Electric Power Sector PDF icon 04-08-2010SGWorkforceSelections.pdf More Documents & Publications ...

  5. List of Companies in Hydrogen Sector | Open Energy Information

    Open Energy Info (EERE)

    Companies in Hydrogen Sector Jump to: navigation, search Companies in the Hydrogen sector: Add a Company Download CSV (rows 1-196) Map of Hydrogen companies Loading map......

  6. Nepal-Sectoral Climate Impacts Economic Assessment | Open Energy...

    Open Energy Info (EERE)

    Nepal-Sectoral Climate Impacts Economic Assessment Jump to: navigation, search Name Nepal Sectoral Climate impacts Economic Assessment AgencyCompany Organization Climate and...

  7. Thermal transport in shock wave–compressed solids using pulsed laser heating

    SciTech Connect (OSTI)

    La Lone, B. M. Capelle, G.; Stevens, G. D.; Turley, W. D.; Veeser, L. R.

    2014-07-15

    A pulsed laser heating method was developed for determining thermal transport properties of solids under shock-wave compression. While the solid is compressed, a laser deposits a known amount of heat onto the sample surface, which is held in the shocked state by a transparent window. The heat from the laser briefly elevates the surface temperature and then diffuses into the interior via one-dimensional heat conduction. The thermal effusivity is determined from the time history of the resulting surface temperature pulse, which is recorded with optical pyrometry. Thermal effusivity is the square root of the product of thermal conductivity and volumetric heat capacity and is the key thermal transport parameter for relating the surface temperature to the interior temperature of the sample in a dynamic compression experiment. Therefore, this method provides information that is needed to determine the thermodynamic state of the interior of a compressed metal sample from a temperature measurement at the surface. The laser heat method was successfully demonstrated on tin that was shock compressed with explosives to a stress and temperature of ∼25 GPa and ∼1300 K. In this state, tin was observed to have a thermal effusivity of close to twice its ambient value. The implications on determining the interior shock wave temperature of tin are discussed.

  8. Fast electron microscopy via compressive sensing

    DOE Patents [OSTI]

    Larson, Kurt W; Anderson, Hyrum S; Wheeler, Jason W

    2014-12-09

    Various technologies described herein pertain to compressive sensing electron microscopy. A compressive sensing electron microscope includes a multi-beam generator and a detector. The multi-beam generator emits a sequence of electron patterns over time. Each of the electron patterns can include a plurality of electron beams, where the plurality of electron beams is configured to impart a spatially varying electron density on a sample. Further, the spatially varying electron density varies between each of the electron patterns in the sequence. Moreover, the detector collects signals respectively corresponding to interactions between the sample and each of the electron patterns in the sequence.

  9. Techniques for optically compressing light intensity ranges

    DOE Patents [OSTI]

    Rushford, M.C.

    1989-03-28

    A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes means for optically compressing the light intensity range appearing at its input sufficient to make it receivable and decipherable by a standard video camera. A number of different means for compressing the intensity range are disclosed. These include the use of photogray glass, the use of a pair of interference filters, and the utilization of a new liquid crystal notch filter in combination with an interference filter. 18 figs.

  10. Techniques for optically compressing light intensity ranges

    DOE Patents [OSTI]

    Rushford, Michael C.

    1989-01-01

    A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes means for optically compressing the light intensity range appearing at its input sufficient to make it receivable and decipherable by a standard video camera. A number of different means for compressing the intensity range are disclosed. These include the use of photogray glass, the use of a pair of interference filters, and the utilization of a new liquid crystal notch filter in combination with an interference filter.

  11. Oil-free centrifugal hydrogen compression technology demonstration

    SciTech Connect (OSTI)

    Heshmat, Hooshang

    2014-05-31

    One of the key elements in realizing a mature market for hydrogen vehicles is the deployment of a safe and efficient hydrogen production and delivery infrastructure on a scale that can compete economically with current fuels. The challenge, however, is that hydrogen, being the lightest and smallest of gases with a lower viscosity and density than natural gas, readily migrates through small spaces and is difficult to compresses efficiently. While efficient and cost effective compression technology is crucial to effective pipeline delivery of hydrogen, the compression methods used currently rely on oil lubricated positive displacement (PD) machines. PD compression technology is very costly, has poor reliability and durability, especially for components subjected to wear (e.g., valves, rider bands and piston rings) and contaminates hydrogen with lubricating fluid. Even so called “oil-free” machines use oil lubricants that migrate into and contaminate the gas path. Due to the poor reliability of PD compressors, current hydrogen producers often install duplicate units in order to maintain on-line times of 98-99%. Such machine redundancy adds substantially to system capital costs. As such, DOE deemed that low capital cost, reliable, efficient and oil-free advanced compressor technologies are needed. MiTi’s solution is a completely oil-free, multi-stage, high-speed, centrifugal compressor designed for flow capacity of 500,000 kg/day with a discharge pressure of 1200 psig. The design employs oil-free compliant foil bearings and seals to allow for very high operating speeds, totally contamination free operation, long life and reliability. This design meets the DOE’s performance targets and achieves an extremely aggressive, specific power metric of 0.48 kW-hr/kg and provides significant improvements in reliability/durability, energy efficiency, sealing and freedom from contamination. The multi-stage compressor system concept has been validated through full scale performance testing of a single stage with helium similitude gas at full speed in accordance with ASME PTC-10. The experimental results indicated that aerodynamic performance, with respect to compressor discharge pressure, flow, power and efficiency exceeded theoretical prediction. Dynamic testing of a simulated multistage centrifugal compressor was also completed under a parallel program to validate the integrity and viability of the system concept. The results give strong confidence in the feasibility of the multi-stage design for use in hydrogen gas transportation and delivery from production locations to point of use.

  12. Internal combustion engine with compound air compression

    SciTech Connect (OSTI)

    Paul, M.A.; Paul, A.

    1991-10-15

    This patent describes an internal combustion engine in combination with a compound air compression system. It comprises: a reciprocator with at least one cylinder, at least one piston reciprocal in the cylinder and a combustion chamber formed in substantial part by portions of the piston and cylinder, the reciprocator having a drive shaft; a rotary compressor having a drive shaft mechanically coupled to the drive shaft of the reciprocator, the rotary compressor having a Wankel-type, three-lobe, epitrochiodal configuration sides having a conduit conjected to the reciprocator for supplying compressed air to the reciprocator; a turbocharged with a gas turbine and a turbocompressor, the turbocompressor having an air conduit connected to the expander side of the rotary compressor; and a bypass conduit with a valve means connecting the turbocharger to the reciprocator for supplying compressed air directly to the reciprocator wherein the drive shaft of the reciprocator and the drive shaft of the compressor have connecting means for transmitting mechanical energy to the reciprocator at mid to high operating speeds of the engine when the turbocharge supplies compressed air to the rotary compressor and, at least in part, drives the rotary compressor.

  13. Stability Of Plasma Configurations During Compression

    SciTech Connect (OSTI)

    Ruden, E L; Hammer, J H

    2006-10-27

    Magnetized Target Fusion (MTF) efforts are based on calculations showing that the addition of a closed magnetic field reduces the driver pressure and rise time requirements for inertial confinement fusion by reducing thermal conductivity. Instabilities that result in convective bulk transport at the Alphen time scale are of particular concern since they are much faster than the implosion time. Such instabilities may occur during compression due to, for example, an increase in the plasma-magnetic pressure ratio {beta} or, in the case of a rotating plasma, spin-up due to angular momentum conservation. Details depend on the magnetic field topology and compression geometry. A hard core z pinch with purely azimuthal magnetic field can theoretically be made that relaxes into a wall supported diffuse profile satisfying the Kadomtsev criterion for the stability of m = 0 modes, which is theoretically preserved during cylindrical outer wall compression. The center conductor radius and current must also be large enough to keep the {beta} below stability limits to stabilize modes with m > 0. The stability of m > 0 modes actually improves during compression. A disadvantage of this geometry, though, is plasma contact with the solid boundaries. In addition to the risk of high Z impurity contamination during the (turbulent) relaxation process, contact thereafter can cause plasma pressure near the outer surface to drop, violating the Kadomtsev criterion locally. The resultant m = 0 instability can then convect impurities inward. Also, the center conductor (which is not part of the Kadomtsev profile) can go m = 0 unstable, convecting impurities outward. One way to mitigate impurity convection is to instead use a Woltjer-Taylor minimum magnetic energy configuration (spheromak). The sheared magnetic field inhibits convection, and the need for the center conductor is eliminated. The plasma, however, would likely still have to be wall supported due to unfavorable {beta} scaling during quasispherical (3-D) compression otherwise. Use of a Field Reversed Configuration (FRC) substantially resolves the wall contact issue, but at the cost of introducing a new (rotational) instability. An FRC has an open magnetic field outside a separatrix which effectively diverts wall material. However, FRC particles diffusing across the separatrix have a preferred angular momentum, causing the FRC within to counter-rotate in response. When the FRC's rotational-diamagnetic drift frequency ratio {alpha} reaches a critical value of order unity, the FRC undergoes a rotational instability that results in rapid particle loss. The instability is exacerbated by cylindrical compression since {beta} {approx} R{sup -2/5} during this phase, assuming angular momentum conservation. A multipole magnetic field frozen into the solid liner during compression may stabilize this mode directly and/or by impeding spin-up without significantly perturbing the implosion's azimuthal symmetry.

  14. Lattice Anharmonicity and Thermal Conductivity from Compressive Sensing of First-Principles Calculations

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

    Zhou, Fei; Nielson, Weston; Xia, Yi; Ozoliņš, Vidvuds

    2014-10-27

    First-principles prediction of lattice thermal conductivity KL of strongly anharmonic crystals is a long-standing challenge in solid state physics. Using recent advances in information science, we propose a systematic and rigorous approach to this problem, compressive sensing lattice dynamics (CSLD). Compressive sensing is used to select the physically important terms in the lattice dynamics model and determine their values in one shot. Non-intuitively, high accuracy is achieved when the model is trained on first-principles forces in quasi-random atomic configurations. The method is demonstrated for Si, NaCl, and Cu12Sb4S13, an earth-abundant thermoelectric with strong phononphonon interactions that limit the room-temperature KLmore » to values near the amorphous limit.« less

  15. Lattice Anharmonicity and Thermal Conductivity from Compressive Sensing of First-Principles Calculations

    SciTech Connect (OSTI)

    Zhou, Fei; Nielson, Weston; Xia, Yi; Ozoliņš, Vidvuds

    2014-10-01

    First-principles prediction of lattice thermal conductivity κL of strongly anharmonic crystals is a long-standing challenge in solid-state physics. Making use of recent advances in information science, we propose a systematic and rigorous approach to this problem, compressive sensing lattice dynamics. Compressive sensing is used to select the physically important terms in the lattice dynamics model and determine their values in one shot. Nonintuitively, high accuracy is achieved when the model is trained on first-principles forces in quasirandom atomic configurations. The method is demonstrated for Si, NaCl, and Cu12Sb4S13, an earth-abundant thermoelectric with strong phonon-phonon interactions that limit the room-temperature κL to values near the amorphous limit.

  16. Adaptation of existing facilities to isentropic compression experiments

    SciTech Connect (OSTI)

    Tasker, Douglas G; Mielke, Charles H; Rodriguez, George; Rickel, Dwight G

    2011-01-07

    We demonstrate that the established pulsed power infrastructure at the National High Magnetic Field Laboratory - Pulsed Field Facility (NHMFL-PFF) at the Los Alamos National Laboratory can be adapted to obtain high quality isentropic compression experiment (ICE) data on materials in extreme conditions of dynamic high pressure. Experiments utilized a single-turn magnet pulsed power system at the NHMFL-PFF that was originally designed to measure actinide samples in extremes of high magnetic field (to 300 Tesla). A simple modification to the single-turn magnet has converted it to a fast turnaround dynamic high pressure measurement system. This paper details the work done including important background details that indicate that much more can be accomplished with optimization of the load characteristics in terms of ultimate peak pressures. To match the rise time of the NHMFL capacitor bank ({approx}2 {mu}s versus {approx}0.5 {mu}s for the Sandia Z-machine) the sample dimensions can be relatively large, i.e., up to 5 mm thickness. The maximum stresses are {approx}50GPa (0.5 Mbar) at the maximum bank voltage (60 kV) and higher pressures may be possible if the sample is tamped. For the design and predictions of performance of the NHMFL-ICE experiment it is important to have good predictive models. A SPICE code simulation was chosen to model all aspects of the experiment, electrical and physical. To this end, accurate dynamic load models were developed to simulate the compression and expansion of the dynamic load at high pressures using shock physics principles. A series experiments have been performed which demonstrated the feasibility of the NHMFL-ICE technique. The results will be shown and discussed. The NHMFL-ICE technique is an excellent method for measuring equations of state (EOS) at megabar pressures. Because a complete EOS can be obtained in one experiment from zero to the peak pressure, and because many shots can be fired in one day, the technique promises to provide high quality EOS data at relatively low cost.

  17. Live Webinar on Better Buildings Challenge: Public-Sector Update

    Broader source: Energy.gov [DOE]

    The Energy Department will present a live webinar titled "Better Buildings Challenge: Public-Sector Update."

  18. Philippines' downstream sector poised for growth

    SciTech Connect (OSTI)

    Not Available

    1992-05-11

    This paper reports that the Philippines' downstream sector is poised for sharp growth. Despite a slip in refined products demand in recent years, Philippines products demand will rebound sharply by 2000, East-West Center (EWC), Honolulu, predicts. Philippines planned refinery expansions are expected to meet that added demand, EWC Director Fereidun Fesharaki says. Like the rest of the Asia-Pacific region, product specifications are changing, but major refiners in the area expect to meet the changes without major case outlays. At the same time, Fesharaki says, push toward deregulation will further bolster the outlook for the Philippines downstream sector.

  19. Energy Outlook for the Transport Sector | Department of Energy

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

    energy intensity data and documentation that supports the information presented on this website. The files are in Microsoft® Excel® format (2007 and later versions). Package icon Entire Set File Economywide File Transportation Sector File Industrial Sector File Residential Buildings Sector File Commercial Buildings Sector File Electricity Sector More Documents & Publications Home Performance Contractor Pro Forma Residential Refrigerators-Freezers (Appendix A1) Refrigerators and

  20. National Ignition Facility (NIF): Under Pressure: Ramp-Compression Smashes

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

    Record | Princeton Plasma Physics Lab National Ignition Facility (NIF): Under Pressure: Ramp-Compression Smashes Record American Fusion News Category: National Ignition Facility Link: National Ignition Facility (NIF): Under Pressure: Ramp-Compression Smashes Record

  1. Crystal structure and compressibility of lead dioxide up to 140...

    Office of Scientific and Technical Information (OSTI)

    Crystal structure and compressibility of lead dioxide up to 140 GPa Citation Details In-Document Search Title: Crystal structure and compressibility of lead dioxide up to 140 GPa ...

  2. 2016 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...

    Energy Savers [EERE]

    6 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas Applications 2016 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas ...

  3. 2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...

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

    2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas Applications 2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas ...

  4. Pre-In-Plant Training Webinar (Compressed Air): Presentation...

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

    Pre-In-Plant Training Webinar (Compressed Air): Presentation Slides Pre-In-Plant Training Webinar (Compressed Air): Presentation Slides The presentation slides from a pre-In-Plant ...

  5. 2015 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...

    Energy Savers [EERE]

    5 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas Applications 2015 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas...

  6. Summary of Compression Testing of U-10Mo

    SciTech Connect (OSTI)

    Nyberg, Eric A.; Joshi, Vineet V.; Lavender, Curt A.; Burkes, Douglas

    2012-10-31

    The mechanical properties of depleted uranium plus 10 weight percent molybdenum alloy have been evaluated by high temperature compression testing.

  7. Evaluation of the Compressed Air Challenge Training Program: Final Report |

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

    Department of Energy Final Report Evaluation of the Compressed Air Challenge Training Program: Final Report This is the final report on an evaluation of the Compressed Air Challenge (CAC) training program, which was designed to provide plant personnel and compressed air system vendors with knowledge and tools required to effect improvements to the energy efficiency and overall performance of plant compressed air systems. The evaluation is based on three main research tasks: analysis of the

  8. Fact Sheet: Isothermal Compressed Air Energy Storage (August 2013) |

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

    Department of Energy Isothermal Compressed Air Energy Storage (August 2013) Fact Sheet: Isothermal Compressed Air Energy Storage (August 2013) SustainX will demonstrate an isothermal compressed air energy storage (ICAES) system. The system captures the heat from compression in water and stores the captured heat until it is needed again for expansion. Storing the captured heat eliminates the need for a gas combustion turbine and improves efficiency. For more information about how OE performs

  9. Onboard Type IV Compressed Hydrogen Storage System Cost Analysis Webinar |

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

    Department of Energy Onboard Type IV Compressed Hydrogen Storage System Cost Analysis Webinar Onboard Type IV Compressed Hydrogen Storage System Cost Analysis Webinar Access the recording and download the presentation slides from the Fuel Cell Technologies Office webinar "Update to the 700 bar Compressed Hydrogen Storage System Cost Projection" held on February 25, 2016. PDF icon Onboard Type IV Compressed Hydrogen Storage System Cost Analysis Webinar Slides More Documents &

  10. IMPROVING COMPRESSED AIR SYSTEM PERFORMANCE: A SOURCEBOOK FOR INDUSTRY

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

    IMPROVING COMPRESSED AIR SYSTEM PERFORMANCE: A SOURCEBOOK FOR INDUSTRY Improving Compressed Air System Performance A Sourcebook for Industry Third Edition U.S. DEPARTMENT OF ENERGY Energy Efficiency & Renewable Energy ADVANCED MANUFACTURING OFFICE IMPROVING COMPRESSED AIR SYSTEM PERFORMANCE: A SOURCEBOOK FOR INDUSTRY ACKNOWLEDGEMENTS Improving Compressed Air System Performance: A Sourcebook for Industry is a cooperative effort of the U.S. Department of Energy's Office of Energy Efficiency

  11. Improving Compressed Air System Performance: A Sourcebook for Industry |

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

    Department of Energy Industry Improving Compressed Air System Performance: A Sourcebook for Industry This sourcebook is designed to provide compressed air system users with a reference that outlines opportunities for system performance improvements. It is not intended to be a comprehensive technical text on improving compressed air systems, but rather a document that makes compressed air system users aware of the performance improvement potential, details some of the significant

  12. Improving Compressed Air System Performance: A Sourcebook for Industry,

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

    Third Edition | Department of Energy Industry, Third Edition Improving Compressed Air System Performance: A Sourcebook for Industry, Third Edition AMO's "Improving Compressed Air System Performance: A Sourcebook for Industry, Third Edition" has been recently revised introducing industry to compressed air systems, performance opportunities and where they can find help on optimizing these important industrial systems. Over the years AMO has worked with the Compressed Air Challenge

  13. 2013 Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop

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

    Final Report | Department of Energy Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Final Report 2013 Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop Final Report Proceedings from the Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop held March 20-21, 2013, at Argonne National Laboratory. PDF icon 2013_csd_workshop_report.pdf More Documents & Publications Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop

  14. Dynamic bed reactor

    DOE Patents [OSTI]

    Stormo, Keith E. (Moscow, ID)

    1996-07-02

    A dynamic bed reactor is disclosed in which a compressible open cell foam matrix is periodically compressed and expanded to move a liquid or fluid through the matrix. In preferred embodiments, the matrix contains an active material such as an enzyme, biological cell, chelating agent, oligonucleotide, adsorbent or other material that acts upon the liquid or fluid passing through the matrix. The active material may be physically immobilized in the matrix, or attached by covalent or ionic bonds. Microbeads, substantially all of which have diameters less than 50 microns, can be used to immobilize the active material in the matrix and further improve reactor efficiency. A particularly preferred matrix is made of open cell polyurethane foam, which adsorbs pollutants such as polychlorophenol or o-nitrophenol. The reactors of the present invention allow unidirectional non-laminar flow through the matrix, and promote intimate exposure of liquid reactants to active agents such as microorganisms immobilized in the matrix.

  15. Compressive stress system for a gas turbine engine

    DOE Patents [OSTI]

    Hogberg, Nicholas Alvin

    2015-03-24

    The present application provides a compressive stress system for a gas turbine engine. The compressive stress system may include a first bucket attached to a rotor, a second bucket attached to the rotor, the first and the second buckets defining a shank pocket therebetween, and a compressive stress spring positioned within the shank pocket.

  16. NEUTRON SOURCE USING MAGNETIC COMPRESSION OF PLASMA

    DOE Patents [OSTI]

    Quinn, W.E.; Elmore, W.C.; Little, E.M.; Boyer, K.; Tuck, J.L.

    1961-10-31

    A fusion reactor is described that utilizes compression and heating of an ionized thermonuclear fuel by an externally applied magnetic field, thus avoiding reliance on the pinch effect and its associated instability problems. The device consists of a gas-confining ceramic container surrounded by a single circumferential coil having a shape such as to produce a magnetic mirror geometry. A sinusoidally-oscillating, exponentially-damped current is passed circumferentially around the container, through the coil, inducing a circumferential current in the gas. Maximum compression and plasma temperature are obtained at the peak of the current oscillations, coinciding with maximum magnetic field intensity. Enhanced temperatures are obtained in the second and succeeding half cycles because the thermal energy accumulates from one half cycle to the next. (AEC)

  17. Method and apparatus for compressing ions

    DOE Patents [OSTI]

    Garimella, Sandilya V. B.; Ibrahim, Yehia M.; Anderson, Gordon A.; Smith, Richard D.

    2015-06-23

    A method and apparatus for compressing ions inside an ion mobility device is disclosed. Ions are introduced into the mobility device. The ions are subjected to a non-constant electric field to form a potential gradient along a portion of the device so that ions with similar mobilities bunch together into sharper peaks while maintaining separation between other ions. The potential gradient progressively increases or decreases along the length of the device.

  18. COMPRESSION SEAL AND SEALING MATERIAL THEREFOR

    DOE Patents [OSTI]

    Branin, T.G.

    1962-05-29

    This patent relates to compression seal and more particularly to a seaiing material therefor. The sealing surface is a coating consisting of alternate layers of gold and of a non-gold metal having similar plastic flow properties under pressure as gold. The coating is substantially free from oxidation effects when exposed to ambient atmosphere and does not become brittle when worked, as in a valve. (AEC)

  19. Compression of ground-motion data

    SciTech Connect (OSTI)

    Long, J.W.

    1981-04-01

    Ground motion data has been recorded for many years at Nevada Test Site and is now stored on thousands of digital tapes. The recording format is very inefficient in terms of space on tape. This report outlines a method to compress the data onto a few hundred tapes while maintaining the accuracy of the recording and allowing restoration of any file to the original format for future use. For future digitizing a more efficient format is described and suggested.

  20. Combined rankine and vapor compression cycles

    DOE Patents [OSTI]

    Radcliff, Thomas D.; Biederman, Bruce P.; Brasz, Joost J.

    2005-04-19

    An organic rankine cycle system is combined with a vapor compression cycle system with the turbine generator of the organic rankine cycle generating the power necessary to operate the motor of the refrigerant compressor. The vapor compression cycle is applied with its evaporator cooling the inlet air into a gas turbine, and the organic rankine cycle is applied to receive heat from a gas turbine exhaust to heat its boiler within one embodiment, a common condenser is used for the organic rankine cycle and the vapor compression cycle, with a common refrigerant, R-245a being circulated within both systems. In another embodiment, the turbine driven generator has a common shaft connected to the compressor to thereby eliminate the need for a separate motor to drive the compressor. In another embodiment, an organic rankine cycle system is applied to an internal combustion engine to cool the fluids thereof, and the turbo charged air is cooled first by the organic rankine cycle system and then by an air conditioner prior to passing into the intake of the engine.

  1. Evolving Role of the Power Sector Regulator: A Clean Energy Regulators Initiative Report

    SciTech Connect (OSTI)

    Zinaman, O.; Miller, M.; Bazilian, M.

    2014-04-01

    This paper seeks to briefly characterize the evolving role of power sector regulation. Given current global dynamics, regulation of the power sector is undergoing dramatic changes. This transformation is being driven by various factors including technological advances and cost reductions in renewable energy, energy efficiency, and demand management; increasing air pollution and climate change concerns; and persistent pressure for ensuring sustainable economic development and increased access to energy services by the poor. These issues add to the already complex task of power sector regulation, of which the fundamental remit remains to objectively and transparently ensure least-cost service delivery at high quality. While no single regulatory task is trivial to undertake, it is the prioritization and harmonization of a multitude of objectives that exemplifies the essential challenge of power sector regulation. Evolving regulatory roles can be understood through the concept of existing objectives and an additional layer of emerging objectives. Following this categorization, we describe seven existing objectives of power sector regulators and nine emerging objectives, highlighting key challenges and outlining interdependencies. This essay serves as a preliminary installment in the Clean Energy Regulatory Initiative (CERI) series, and aims to lay the groundwork for subsequent reports and case studies that will explore these topics in more depth.

  2. Review of Sector and Regional Trends in U.S. Electricity Markets. Focus on Natural Gas. Natural Gas and the Evolving U.S. Power Sector Monograph Series. Number 1 of 3

    SciTech Connect (OSTI)

    Logan, Jeffrey; Medlock, III, Kenneth B.; Boyd, William C.

    2015-10-15

    This study explores dynamics related to natural gas use at the national, sectoral, and regional levels, with an emphasis on the power sector. It relies on a data set from SNL Financial to analyze recent trends in the U.S. power sector at the regional level. The research aims to provide decision and policy makers with objective and credible information, data, and analysis that informs their discussions of a rapidly changing energy system landscape. This study also summarizes regional changes in natural gas demand within the power sector. The transition from coal to natural gas is occurring rapidly along the entire eastern portion of the country, but is relatively stagnant in the central and western regions. This uneven shift is occurring due to differences in fuel price costs, renewable energy targets, infrastructure constraints, historical approach to regulation, and other factors across states.

  3. A Bunch Compression Method for Free Electron Lasers that Avoids Parasitic Compressions

    SciTech Connect (OSTI)

    Benson, Stephen V.; Douglas, David R.; Tennant, Christopher D.; Wilson, Frederick G.; Nguyen, Dinh

    2015-09-01

    Virtually all existing high energy (>few MeV) linac-driven FELs compress the electron bunch length though the use of off-crest acceleration on the rising side of the RF waveform followed by transport through a magnetic chicane. This approach has at least three flaws: 1) it is difficult to correct aberrations- particularly RF curvature, 2) rising side acceleration exacerbates space charge-induced distortion of the longitudinal phase space, and 3) all achromatic "negative compaction" compressors create parasitic compression during the final compression process, increasing the CSR-induced emittance growth. One can avoid these deficiencies by using acceleration on the falling side of the RF waveform and a compressor with M56>0. This approach offers multiple advantages: 1) It is readily achieved in beam lines supporting simple schemes for aberration compensation, 2) Longitudinal space charge (LSC)-induced phase space distortion tends, on the falling side of the RF waveform, to enhance the chirp, and 3) Compressors with M56>0 can be configured to avoid spurious over-compression. We will discuss this bunch compression scheme in detail and give results of a successful beam test in April 2012 using the JLab UV Demo FEL

  4. Reactivity Controlled Compression Ignition (RCCI) Combustion on a Multi-Cylinder Light-Duty Diesel Engine

    SciTech Connect (OSTI)

    Curran, Scott; Hanson, Reed M; Wagner, Robert M

    2012-01-01

    Reactivity controlled compression ignition is a low-temperature combustion technique that has been shown, both in computational fluid dynamics modeling and single-cylinder experiments, to obtain diesel-like efficiency or better with ultra-low nitrogen oxide and soot emissions, while operating primarily on gasoline-like fuels. This paper investigates reactivity controlled compression ignition operation on a four-cylinder light-duty diesel engine with production-viable hardware using conventional gasoline and diesel fuel. Experimental results are presented over a wide speed and load range using a systematic approach for achieving successful steady-state reactivity controlled compression ignition combustion. The results demonstrated diesel-like efficiency or better over the operating range explored with low engine-out nitrogen oxide and soot emissions. A peak brake thermal efficiency of 39.0% was demonstrated for 2600 r/min and 6.9 bar brake mean effective pressure with nitrogen oxide emissions reduced by an order of magnitude compared to conventional diesel combustion operation. Reactivity controlled compression ignition emissions and efficiency results are compared to conventional diesel combustion operation on the same engine.

  5. End-Use Sector Flowchart | Department of Energy

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

    End-Use Sector Flowchart End-Use Sector Flowchart This system of energy intensity indicators for total energy covers the economy as a whole and each of the major end-use sectors-transportation, industry, commercial and residential-identified in Figure 1. By clicking on any of the boxes with the word "Sector" in the title will reveal the more detailed structure within that sector. PDF icon End-Use Sector Flowchart More Documents & Publications Barriers to Industrial Energy

  6. Method for preventing jamming conditions in a compression device

    DOE Patents [OSTI]

    Williams, Paul M.; Faller, Kenneth M.; Bauer, Edward J.

    2002-06-18

    A compression device for feeding a waste material to a reactor includes a waste material feed assembly having a hopper, a supply tube and a compression tube. Each of the supply and compression tubes includes feed-inlet and feed-outlet ends. A feed-discharge valve assembly is located between the feed-outlet end of the compression tube and the reactor. A feed auger-screw extends axially in the supply tube between the feed-inlet and feed-outlet ends thereof. A compression auger-screw extends axially in the compression tube between the feed-inlet and feed-outlet ends thereof. The compression tube is sloped downwardly towards the reactor to drain fluid from the waste material to the reactor and is oriented at generally right angle to the supply tube such that the feed-outlet end of the supply tube is adjacent to the feed-inlet end of the compression tube. A programmable logic controller is provided for controlling the rotational speed of the feed and compression auger-screws for selectively varying the compression of the waste material and for overcoming jamming conditions within either the supply tube or the compression tube.

  7. Compression device for feeding a waste material to a reactor

    DOE Patents [OSTI]

    Williams, Paul M.; Faller, Kenneth M.; Bauer, Edward J.

    2001-08-21

    A compression device for feeding a waste material to a reactor includes a waste material feed assembly having a hopper, a supply tube and a compression tube. Each of the supply and compression tubes includes feed-inlet and feed-outlet ends. A feed-discharge valve assembly is located between the feed-outlet end of the compression tube and the reactor. A feed auger-screw extends axially in the supply tube between the feed-inlet and feed-outlet ends thereof. A compression auger-screw extends axially in the compression tube between the feed-inlet and feed-outlet ends thereof. The compression tube is sloped downwardly towards the reactor to drain fluid from the waste material to the reactor and is oriented at generally right angle to the supply tube such that the feed-outlet end of the supply tube is adjacent to the feed-inlet end of the compression tube. A programmable logic controller is provided for controlling the rotational speed of the feed and compression auger-screws for selectively varying the compression of the waste material and for overcoming jamming conditions within either the supply tube or the compression tube.

  8. Combined local-density and dynamical mean field theory calculations for the

    Office of Scientific and Technical Information (OSTI)

    compressed lanthanides Ce, Pr, and Nd (Journal Article) | SciTech Connect Journal Article: Combined local-density and dynamical mean field theory calculations for the compressed lanthanides Ce, Pr, and Nd Citation Details In-Document Search Title: Combined local-density and dynamical mean field theory calculations for the compressed lanthanides Ce, Pr, and Nd This paper reports calculations for compressed Ce (4f{sup 1}), Pr (4f{sup 2}), and Nd (4f{sup 3}) using a combination of the

  9. Homogenous charge compression ignition engine having a cylinder including a high compression space

    DOE Patents [OSTI]

    Agama, Jorge R.; Fiveland, Scott B.; Maloney, Ronald P.; Faletti, James J.; Clarke, John M.

    2003-12-30

    The present invention relates generally to the field of homogeneous charge compression engines. In these engines, fuel is injected upstream or directly into the cylinder when the power piston is relatively close to its bottom dead center position. The fuel mixes with air in the cylinder as the power piston advances to create a relatively lean homogeneous mixture that preferably ignites when the power piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. Thus, the present invention divides the homogeneous charge between a controlled volume higher compression space and a lower compression space to better control the start of ignition.

  10. Let the private sector handle energy conservation

    SciTech Connect (OSTI)

    Bajer, E.R.

    1982-08-23

    Mr. Bajer feels that elimination of many federal conservation programs will have no effect on the US goal of reducing oil imports because the private sector can do a better job of providing these efforts. He notes that many government programs were the result of overreaction to the 1973 oil embargo, when Congress misread the public's willingness to respond. The American people have taken the initiative, however, and have reduced their energy consumption and import rates. Mr. Bajer further notes that, according to the DOE Office of Policy, Planning and Analysis, DOE's conservation programs accounted for less than 5% of reduction of energy use per unit of GNP. He thinks that new policies will allow market forces to continue providing conservation incentives and will remove government intervention and competition with the private sector. (DCK)

  11. US Energy Sector Vulnerabilities to Climate Change

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

    On the cover: Trans-Alaska oil pipeline; aerial view of New Jersey refinery; coal barges on Mississippi River in St. Paul, Minnesota; power plant in Prince George's County, Maryland; Grand Coulee Dam in Washington State; corn field near Somers, Iowa; wind turbines in Texas. Photo credits: iStockphoto U.S. ENERGY SECTOR VULNERABILITIES TO CLIMATE CHANGE AND EXTREME WEATHER Acknowledgements This report was drafted by the U.S. Department of Energy's Office of Policy and International Affairs

  12. Energy Intensity Changes by Sector, 1985-2011 - Alternative Measures...

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

    Changes by Sector, 1985-2011 - Alternative Measures by Type of Energy Energy Intensity Changes by Sector, 1985-2011 - Alternative Measures by Type of Energy Further insight with ...

  13. Sector 3 : High Resolution X-ray Scattering | Advanced Photon...

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

    & workshops IXN Group Useful Links Current APS status ESAF System GUP System X-Ray Science Division My APS Portal Sector 3 : High Resolution X-ray Scattering Sector 3 is...

  14. Fact #610: February 15, 2010 All Sectors' Petroleum Gap

    Broader source: Energy.gov [DOE]

    Before 1989 the U.S. produced enough petroleum to meet the needs of the transportation sector, but was still short of meeting the petroleum needs of all the sectors, including industrial,...

  15. Fact #561: March 9, 2009 All Sectors' Petroleum Gap

    Broader source: Energy.gov [DOE]

    Before 1989 the U.S. produced enough petroleum to meet the needs of the transportation sector, but was still short of meeting the petroleum needs of all the sectors, including industrial,...

  16. List of Companies in Wind Sector | Open Energy Information

    Open Energy Info (EERE)

    Wind Sector Jump to: navigation, search WindTurbine-icon.png Companies in the Wind energy sector: Add a Company Download CSV (rows 1-1693) Map of Wind energy companies Loading...

  17. Fact #619: April 19, 2010 Transportation Sector Revenue by Industry

    Broader source: Energy.gov [DOE]

    According the latest Economic Census (2002), the trucking industry is the largest contributor of revenue in the transportation sector, contributing more than one-quarter of the sectors revenue. The...

  18. List of Companies in Biofuels Sector | Open Energy Information

    Open Energy Info (EERE)

    List of Companies in Biofuels Sector Jump to: navigation, search BiomassImage.JPG Companies in the Biofuels sector: Add a Company Download CSV (rows 1-256) Map of Biofuels...

  19. Roadmap to Secure Control Systems in the Energy Sector 2006 ...

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

    Roadmap to Secure Control Systems in the Energy Sector 2006 - Presentation to the 2008 ieRoadmap Workshop Roadmap to Secure Control Systems in the Energy Sector 2006 - Presentation ...

  20. ANL Study Shows Wind Power Decreases Power Sector Emissions ...

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

    ANL Study Shows Wind Power Decreases Power Sector Emissions ANL Study Shows Wind Power Decreases Power Sector Emissions May 1, 2012 - 3:38pm Addthis This is an excerpt from the ...

  1. International magnetic pulse compression workshop: (Proceedings)

    SciTech Connect (OSTI)

    Kirbie, H.C.; Newton, M.A.; Siemens, P.D.

    1991-04-01

    A few individuals have tried to broaden the understanding of specific and salient pulsed-power topics. One such attempt is this documentation of a workshop on magnetic switching as it applies primarily to pulse compression (power transformation), affording a truly international perspective by its participants under the initiative and leadership of Hugh Kirbie and Mark Newton of the Lawrence Livermore National Laboratory (LLNL) and supported by other interested organizations. During the course of the Workshop at Granlibakken, a great deal of information was amassed and a keen insight into both the problems and opportunities as to the use of this switching approach was developed. The segmented workshop format proved ideal for identifying key aspects affecting optimum performance in a variety of applications. Individual groups of experts addressed network and system modeling, magnetic materials, power conditioning, core cooling and dielectrics, and finally circuits and application. At the end, they came together to consolidate their input and formulate the workshop's conclusions, identifying roadblocks or suggesting research projects, particularly as they apply to magnetic switching's trump card--its high-average-power-handling capability (at least on a burst-mode basis). The workshop was especially productive both in the quality and quantity of information transfer in an environment conducive to a free and open exchange of ideas. We will not delve into the organization proper of this meeting, rather we wish to commend to the interested reader this volume, which provides the definitive and most up-to-date compilation on the subject of magnetic pulse compression from underlying principles to current state of the art as well as the prognosis for the future of magnetic pulse compression as a consensus of the workshop's organizers and participants.

  2. Coke cake behavior under compressive forces

    SciTech Connect (OSTI)

    Watakabe, S.; Takeda, T.; Itaya, H.; Suginobe, H.

    1997-12-31

    The deformation of the coke cake and load on the side wall during pushing were studied using an electric furnace equipped with a movable wall. Coke cake was found to deform in three stages under compressive forces. The coke cake was shortened in the pushing direction in the cake deformation stage, and load was generated on the side walls in the high wall load stage. Secondary cracks in the coke cake were found to prevent load transmission on the wall. The maximum load transmission rate was controlled by adjusting the maximum fluidity and mean reflectance of the blended coal.

  3. New Regenerative Cycle for Vapor Compression Refrigeration

    Office of Scientific and Technical Information (OSTI)

    SCIENTIFIC REPORT Title Page Project Title: New Regenerative Cycle for Vapor Compression Refrigeration DOE Award Number: DE-FG36-04GO14327 Document Title: Final Scientific Report Period Covered by Report: September 30, 2004 to September 30, 2005 Name and Address of Recipient Organization: Magnetic Development, Inc., 68 Winterhill Road, Madison, CT 06443, phone: 203-214-7247, fax: 203-421-7948, e-mail: mjb1000@aol.com Contact Information: Mark J. Bergander, Ph.D., P.E., Principal Investigator,

  4. Low emissions compression ignited engine technology

    DOE Patents [OSTI]

    Coleman, Gerald N.; Kilkenny, Jonathan P.; Fluga, Eric C.; Duffy, Kevin P.

    2007-04-03

    A method and apparatus for operating a compression ignition engine having a cylinder wall, a piston, and a head defining a combustion chamber. The method and apparatus includes delivering fuel substantially uniformly into the combustion chamber, the fuel being dispersed throughout the combustion chamber and spaced from the cylinder wall, delivering an oxidant into the combustion chamber sufficient to support combustion at a first predetermined combustion duration, and delivering a diluent into the combustion chamber sufficient to change the first predetermined combustion duration to a second predetermined combustion duration different from the first predetermined combustion duration.

  5. Chapter 2 - Energy Sectors and Systems | Department of Energy

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

    2 - Energy Sectors and Systems Chapter 2 - Energy Sectors and Systems Chapter 2 - Energy Sectors and Systems Within and between the electricity, fuels, transportation, buildings, and manufacturing sectors, increasing interconnectedness and complexity are creating opportunities and challenges that can be approached from a systems perspective. Some of the most transformational opportunities exist at the systems level. They are enabled by the ability to understand, predict, and control very large

  6. Low Carbon Society Toward 2050: Indonesia Energy Sector | Open...

    Open Energy Info (EERE)

    for Global Environmental Strategies, Mizuho Information & Research Institute - Japan, Kyoto University, Institut Teknologi Bandung (ITB) - Indonesia Sector: Energy Focus...

  7. Working with the Real Estate Sector | Department of Energy

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

    the Real Estate Sector Working with the Real Estate Sector Better Buildings Neighborhood Program Workforce Peer Exchange Call: Working with the Real Estate Sector, Call Slides and Discussion Summary, March 1, 2012. This call discussed effective strategies for working with the real estate sector. PDF icon Call Slides and Discussion Summary More Documents & Publications Trends in Real Estate and Energy Efficiency Mastermind Session: Connecting the Dots Between the Real Estate Market and

  8. Carbon Market Opportunities for the Forestry Sector of Africa...

    Open Energy Info (EERE)

    of the United Nations, Winrock International Sector: Land Focus Area: Renewable Energy, Forestry Topics: Implementation, Policiesdeployment programs Resource Type:...

  9. U.S. Energy Information Administration (EIA) - Sector

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

    RenewableAlternative Nuclear Sector Residential Commercial Industrial Transportation Energy Demand Other Emissions Prices Macroeconomic International Efficiency Publication...

  10. DOE Encourages Utility Sector Nominations to the Federal Communication...

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

    Commission's Communications, Security, Reliability, and Interoperability Council DOE Encourages Utility Sector Nominations to the Federal Communications Commission's...

  11. Energy Impact Illinois: Overcoming Barriers in the Multifamily Sector

    Broader source: Energy.gov [DOE]

    Presents how Energy Impact Illinois overcame barriers in the multifamily sector through financing partnerships and expert advice.

  12. Oak Ridge Reservation’s emergency sectors change

    Broader source: Energy.gov [DOE]

    TEMA has issued revised emergency sectors for the DOE Oak Ridge Reservation. These sectors, labeled A-Y, determine which areas should take action if an event occurs at one of DOE’s sites locally. The new sector boundaries have improved correlation with roads, waterways, and recognizable landmarks.

  13. University of Arizona Compressed Air Energy Storage

    SciTech Connect (OSTI)

    Simmons, Joseph; Muralidharan, Krishna

    2012-12-31

    Boiled down to its essentials, the grant’s purpose was to develop and demonstrate the viability of compressed air energy storage (CAES) for use in renewable energy development. While everyone agrees that energy storage is the key component to enable widespread adoption of renewable energy sources, the development of a viable scalable technology has been missing. The Department of Energy has focused on expanded battery research and improved forecasting, and the utilities have deployed renewable energy resources only to the extent of satisfying Renewable Portfolio Standards. The lack of dispatchability of solar and wind-based electricity generation has drastically increased the cost of operation with these components. It is now clear that energy storage coupled with accurate solar and wind forecasting make up the only combination that can succeed in dispatchable renewable energy resources. Conventional batteries scale linearly in size, so the price becomes a barrier for large systems. Flow batteries scale sub-linearly and promise to be useful if their performance can be shown to provide sufficient support for solar and wind-base electricity generation resources. Compressed air energy storage provides the most desirable answer in terms of scalability and performance in all areas except efficiency. With the support of the DOE, Tucson Electric Power and Science Foundation Arizona, the Arizona Research Institute for Solar Energy (AzRISE) at the University of Arizona has had the opportunity to investigate CAES as a potential energy storage resource.

  14. Fuel cell separator with compressible sealing flanges

    DOE Patents [OSTI]

    Mientek, Anthony P.

    1985-04-30

    A separator for separating adjacent fuel cells in a stack of such cells includes a flat, rectangular, gas-impermeable plate disposed between adjacent cells and having two opposite side margins thereof folded back over one side of the plate to form two first seal flanges and having the other side margins thereof folded back over the opposite side of the plate to form two second seal flanges, each of the seal flanges cooperating with the plate to define a channel in which is disposed a resiliently compressible stack of thin metal sheets. The two first seal flanges cooperate with the electrolyte matrix of one of the cells to form a gas-impermeable seal between an electrode of the one cell and one of two reactant gas manifolds. The second seal flanges cooperate with the electrolyte matrix of the other cell for forming a gas-impermeable seal between an electrode of the other cell and the other of the two reactant gas manifolds. The seal flanges cooperate with the associated compressible stacks of sheets for maintaining a spacing between the plate and the electrolyte matrices while accommodating variation of that spacing.

  15. Fuel cell separator with compressible sealing flanges

    DOE Patents [OSTI]

    Mientek, A.P.

    1984-03-30

    A separator for separating adjacent fuel cells in a stack of such cells includes a flat, rectangular, gas-impermeable plate disposed between adjacent cells and having two opposite side margins thereof folded back over one side of the plate to form two first seal flanges and having the other side margins thereof folded back over the opposite side of the plate to form two second seal flanges, each of the seal flanges cooperating with the plate to define a channel in which is disposed a resiliently compressible stack of thin metal sheets. The two first seal flanges cooperate with the electrolyte matrix of one of the cells to form a gas-impermeable seal between an electrode of the one cell and one of two reactant gas manifolds. The second seal flanges cooperate with the electrolyte matrix of the other cell for forming a gas-impermeable seal between an electrode of the other cell and the other of the two reactant gas manifolds. The seal flanges cooperate with the associated compressible stacks of sheets for maintaining a spacing between the plate and the electrolyte matrices while accommodating variation of that spacing.

  16. Frequency extrapolation by nonconvex compressive sensing

    SciTech Connect (OSTI)

    Chartrand, Rick; Sidky, Emil Y; Pan, Xiaochaun

    2010-12-03

    Tomographic imaging modalities sample subjects with a discrete, finite set of measurements, while the underlying object function is continuous. Because of this, inversion of the imaging model, even under ideal conditions, necessarily entails approximation. The error incurred by this approximation can be important when there is rapid variation in the object function or when the objects of interest are small. In this work, we investigate this issue with the Fourier transform (FT), which can be taken as the imaging model for magnetic resonance imaging (MRl) or some forms of wave imaging. Compressive sensing has been successful for inverting this data model when only a sparse set of samples are available. We apply the compressive sensing principle to a somewhat related problem of frequency extrapolation, where the object function is represented by a super-resolution grid with many more pixels than FT measurements. The image on the super-resolution grid is obtained through nonconvex minimization. The method fully utilizes the available FT samples, while controlling aliasing and ringing. The algorithm is demonstrated with continuous FT samples of the Shepp-Logan phantom with additional small, high-contrast objects.

  17. Alvar variable compression engine development. Final report

    SciTech Connect (OSTI)

    1998-03-30

    The Alvar engine is an invention by Mr. Alvar Gustafsson of Skarblacka, Sweden. It is a four stroke spark ignition internal combustion engine, having variable compression ratio and variable displacements. The compression ratio can be varied by means of small secondary cylinders and pistons which are communicating with the main combustion chambers. The secondary pistons can be phase shifted with respect to the main pistons. The engine is suitable for multi-fuel operation. Invention rights are held by Alvar Engine AB of Sweden, a company created to handle the development of the Alvar Engine. A project was conceived wherein an optimised experimental engine would be built and tested to verify the advantages claimed for the Alvar engine and also to reveal possible drawbacks, if any. Alvar Engine AB appointed Gunnar Lundholm, professor of Combustion Engines at Lund University, Lund, Sweden as principal investigator. The project could be seen as having three parts: (1) Optimisation of the engine combustion chamber geometry; (2) Design and manufacturing of the necessary engine parts; and (3) Testing of the engine in an engine laboratory NUTEK, The Swedish Board for Industrial and Technical Development granted Gunnar Lundholm, SEK 50000 (about $6700) to travel to the US to evaluate potential research and development facilities which seemed able to perform the different project tasks.

  18. Inductively Driven, 3D Liner Compression of a Magnetized Plasma to Megabar Energy Densities

    SciTech Connect (OSTI)

    Slough, John

    2015-02-01

    To take advantage of the smaller scale, higher density regime of fusion an efficient method for achieving the compressional heating required to reach fusion gain conditions must be found. What is proposed is a more flexible metallic liner compression scheme that minimizes the kinetic energy required to reach fusion. It is believed that it is possible to accomplish this at sub-megajoule energies. This however will require operation at very small scale. To have a realistic hope of inexpensive, repetitive operation, it is essential to have the liner kinetic energy under a megajoule which allows for the survivability of the vacuum and power systems. At small scale the implosion speed must be reasonably fast to maintain the magnetized plasma (FRC) equilibrium during compression. For limited liner kinetic energy, it becomes clear that the thinnest liner imploded to the smallest radius consistent with the requirements for FRC equilibrium lifetime is desired. The proposed work is directed toward accomplishing this goal. Typically an axial (Z) current is employed for liner compression. There are however several advantages to using a θ-pinch coil. With the θ-pinch the liner currents are inductively driven which greatly simplifies the apparatus and vacuum system, and avoids difficulties with the post implosion vacuum integrity. With fractional flux leakage, the foil liner automatically provides for the seed axial compression field. To achieve it with optimal switching techniques, and at an accelerated pace however will require additional funding. This extra expense is well justified as the compression technique that will be enabled by this funding is unique in the ability to implode individual segments of the liner at different times. This is highly advantageous as the liner can be imploded in a manner that maximizes the energy transfer to the FRC. Production of shaped liner implosions for additional axial compression can thus be readily accomplished with the modified power modules. The additional energy and switching capability proposed will thus provide for optimal utilization of the liner energy. The following tasks were outlined for the three year effort: (1) Design and assemble the foil liner compression test structure and chamber including the compression bank and test foils [Year 1]. (2) Perform foil liner compression experiments and obtain performance data over a range on liner dimensions and bank parameters [Year 2]. (3) Carry out compression experiments of the FRC plasma to Megagauss fields and measure key fusion parameters [Year 3]. (4) Develop numerical codes and analyze experimental results, and determine the physics and scaling for future work [Year 1-3]. The principle task of the project was to design and assemble the foil liner FRC formation chamber, the full compression test structure and chamber including the compression bank. This task was completed successfully. The second task was to test foils in the test facility constructed in year one and characterize the performance obtained from liner compression. These experimental measurements were then compared with analytical predictions, and numerical code results. The liner testing was completed and compared with both the analytical results as well as the code work performed with the 3D structural dynamics package of ANSYS Metaphysics®. This code is capable of modeling the dynamic behavior of materials well into the non-linear regime (e.g. a bullet hit plate glass). The liner dynamic behavior was found to be remarkably close to that predicted by the 3D structural dynamics results. Incorporating a code that can also include the magnetics and plasma physics has also made significant progress at the UW. The remaining test bed construction and assembly task is was completed, and the FRC formation and merging experiments were carried out as planned. The liner compression of the FRC to Megagauss fields was not performed due to not obtaining a sufficiently long lived FRC during the final year of the grant. Modifications planned to correct this deficiency included a larger FRC source as well as a much larger liner driver energy storage system. Due to discontinuation of the grant neither of these improvements were carried out.

  19. Modeling non-equilibrium phase transitions in isentropically compressed Bi

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect Conference: Modeling non-equilibrium phase transitions in isentropically compressed Bi Citation Details In-Document Search Title: Modeling non-equilibrium phase transitions in isentropically compressed Bi We report here on modeling of non-equilibrium phase transitions in Bi samples isentropically compressed to 120 GPa by a ramped drive, which is produced using the Janus laser. In the experiments, the Bi samples are attached to windows of LiF or sapphire, and

  20. High load operation in a homogeneous charge compression ignition engine

    DOE Patents [OSTI]

    Duffy, Kevin P.; Kieser, Andrew J.; Liechty, Michael P.; Hardy, William L.; Rodman, Anthony; Hergart, Carl-Anders

    2008-12-23

    A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic

  1. Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop |

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

    Department of Energy Compression, Storage, and Dispensing Cost Reduction Workshop Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop The U.S. Department of Energy's (DOE's) Argonne National Laboratory (ANL) held a Hydrogen Compression, Storage, and Dispensing Cost Reduction Workshop on March 20-21, 2013, in Argonne, Illinois. The workshop featured 36 participants representing industry, government, and national laboratories with expertise in the relevant fields. The

  2. Compressing turbulence to improve inertial confinement fusion experiments |

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

    Princeton Plasma Physics Lab Compressing turbulence to improve inertial confinement fusion experiments By John Greenwald March 15, 2016 Tweet Widget Google Plus One Share on Facebook Compression of a turbulent plasma. Image by Seth Davidovits Compression of a turbulent plasma. Image by Seth Davidovits Physicists have long regarded plasma turbulence as unruly behavior that can limit the performance of fusion experiments. But new findings by researchers associated with the U.S. Department of

  3. Compressing turbulence to improve inertial confinement fusion experiments |

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

    Princeton Plasma Physics Lab Compressing turbulence to improve inertial confinement fusion experiments By John Greenwald March 15, 2016 Tweet Widget Google Plus One Share on Facebook Compression of a turbulent plasma. Image by Seth Davidovits. Compression of a turbulent plasma. Image by Seth Davidovits. Physicists have long regarded plasma turbulence as unruly behavior that can limit the performance of fusion experiments. But new findings by researchers associated with the U.S. Department of

  4. Experimental investigation of piston heat transfer under conventional diesel and reactivity-controlled compression ignition combustion regimes

    SciTech Connect (OSTI)

    Splitter, Derek A; Hendricks, Terry Lee; Ghandhi, Jaal B

    2014-01-01

    The piston of a heavy-duty single-cylinder research engine was instrumented with 11 fast-response surface thermocouples, and a commercial wireless telemetry system was used to transmit the signals from the moving piston. The raw thermocouple data were processed using an inverse heat conduction method that included Tikhonov regularization to recover transient heat flux. By applying symmetry, the data were compiled to provide time-resolved spatial maps of the piston heat flux and surface temperature. A detailed comparison was made between conventional diesel combustion and reactivity-controlled compression ignition combustion operations at matched conditions of load, speed, boost pressure, and combustion phasing. The integrated piston heat transfer was found to be 24% lower, and the mean surface temperature was 25 C lower for reactivity-controlled compression ignition operation as compared to conventional diesel combustion, in spite of the higher peak heat release rate. Lower integrated piston heat transfer for reactivity-controlled compression ignition was found over all the operating conditions tested. The results showed that increasing speed decreased the integrated heat transfer for conventional diesel combustion and reactivity-controlled compression ignition. The effect of the start of injection timing was found to strongly influence conventional diesel combustion heat flux, but had a negligible effect on reactivity-controlled compression ignition heat flux, even in the limit of near top dead center high-reactivity fuel injection timings. These results suggest that the role of the high-reactivity fuel injection does not significantly affect the thermal environment even though it is important for controlling the ignition timing and heat release rate shape. The integrated heat transfer and the dynamic surface heat flux were found to be insensitive to changes in boost pressure for both conventional diesel combustion and reactivity-controlled compression ignition. However, for reactivity-controlled compression ignition, the mean surface temperature increased with changes in boost suggesting that equivalence ratio affects steady-state heat transfer.

  5. High Performance Mica-based Compressive Seals for Solid Oxide...

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

    High Performance Mica-based Compressive Seals for Solid Oxide Fuel Cells Pacific Northwest National Laboratory Contact PNNL About This Technology In their work, PNNL researchers...

  6. Guidelines for Selecting a Compressed Air System Service Provider

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

    such as pneumatic tools, pneumatic controls, compressed air operated cylinders for machine actuation, ... demand side for optimum efficiency, energy savings, and reliability. ...

  7. Technical Assessment of Cryo-Compressed Hydrogen Storage Tank...

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

    Technical Assessment of Cryo-Compressed Hydrogen Storage Tank Systems for Automotive Applications Technical report describing DOE's second assessment report on a third generation ...

  8. Pdc- The Worldwide Leader in Hydrogen Refueling Station Compression

    Broader source: Energy.gov [DOE]

    This presentation by Matther Weaver of Pdc Machines Inc. was given at the was given at the DOE Hydrogen Compression, Storage, and Dispensing Workshop in March 2013.

  9. Multilayer compressive seal for sealing in high temperature devices

    DOE Patents [OSTI]

    Chou, Yeong-Shyung; Stevenson, Jeffry W.

    2007-08-21

    A mica based compressive seal has been developed exhibiting superior thermal cycle stability when compared to other compressive seals known in the art. The seal is composed of compliant glass or metal interlayers and a sealing (gasket) member layer composed of mica that is infiltrated with a glass forming material, which effectively reduces leaks within the seal. The compressive seal shows approximately a 100-fold reduction in leak rates compared with previously developed hybrid seals after from 10 to about 40 thermal cycles under a compressive stress of from 50 psi to 100 psi at temperatures in the range from 600.degree. C. to about 850.degree. C.

  10. The Effects of Fuel Composition and Compression Ratio on Thermal...

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

    The Effects of Fuel Composition and Compression Ratio on Thermal Efficiency in an HCCI Engine Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research ...

  11. IMPROVING COMPRESSED AIR SYSTEM PERFORMANCE: A SOURCEBOOK FOR...

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

    ... AIRMaster+ provides a systematic approach to assessing ... to create case studies by changing process, mechanical, or ... www.cagi.orgeducationvideos Compressed Air: ...

  12. Determining the Right Air Quality for Your Compressed Air System...

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

    coating, climate control Process Air Food and pharmaceutical process air, ... Contaminants can enter a compressed air system at the compressor intake, or can be ...

  13. Rapid Compression Machine … A Key Experimental Device to Effectively...

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

    to Effectively Collaborate with Basic Energy Sciences Rapid Compression Machine A Key Experimental Device to Effectively Collaborate with Basic Energy Sciences 2011 DOE ...

  14. Ultrafast kinetics subsequent to shock compression in an oxygen...

    Office of Scientific and Technical Information (OSTI)

    to shock compression in an oxygen-balanced mixture of nitromethane and hydrogen peroxide Citation Details In-Document Search Title: Ultrafast kinetics subsequent to shock ...

  15. Raman spectroscopy in hot compressed hydrogen and nitrogen -...

    Office of Scientific and Technical Information (OSTI)

    Raman spectroscopy in hot compressed hydrogen and nitrogen - implications for the intramolecular potential Citation Details In-Document Search Title: Raman spectroscopy in hot...

  16. EA-1976: Emera CNG, LLC Compressed Natural Gas Project, Florida...

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

    Emera's CNG plant facilities to receive, dehydrate, and compress gas to fill pressure vessels with an open International Organization for Standardization (ISO) container frame...

  17. Compressed Air Energy Storage (CAES) | Open Energy Information

    Open Energy Info (EERE)

    and stored in a reservoir, then when electricity is needed, air is heated with natural gas and expanded through a turbine. Adiabatic Adiabatic compressed air energy storage...

  18. Used Fuel Disposition Campaign Phase I Ring Compression Testing...

    Energy Savers [EERE]

    Phase I Ring Compression Testing of High Burnup Cladding Used Fuel Disposition Campaign ... of the technical basis for extended storage and transportation of high-burnup fuel. ...

  19. Light-Duty Reactivity Controlled Compression Ignition Drive Cycle...

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

    Ignition Drive Cycle Fuel Economy and Emissions Estimates Light-Duty Reactivity Controlled Compression Ignition Drive Cycle Fuel Economy and Emissions Estimates Vehicle ...

  20. Effect of Premixed Charge Compression Ignition on Vehicle Fuel...

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

    Effect of Premixed Charge Compression Ignition on Vehicle Fuel Economy and Emissions Reduction over Transient Driving Cycles In conventional vehicles, most engine operating points ...

  1. Heavy Alcohols as a Fuel Blending Agent for Compression Ignition...

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

    Avoidance Characterization of Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) Using Hydrated Ethanol and Diesel Fuel BiodieselFuelManagementBestPracticesReport.pdf

  2. Price of Compressed Houlton ME Natural Gas Imports from Canada...

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

    Houlton ME Natural Gas Imports from Canada (Dollars per Thousand Cubic Feet) Price of Compressed Houlton ME Natural Gas Imports from Canada (Dollars per Thousand Cubic Feet) Year ...

  3. Advanced Hybrid Water-Heater Using Electrochemical Compression...

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

    Hybrid Water-Heater Using Electrochemical Compression (ECC) 2016 Building Technologies ... Key Partners: Project Goal: Develop a heat pump water heater utilizing electrochemical ...

  4. The compressibility of cubic white, orthorhombic black and rhombohedra...

    Office of Scientific and Technical Information (OSTI)

    Org: USDOE Country of Publication: United States Language: English Subject: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COMPRESSIBILITY; CRYSTAL STRUCTURE; PHOSPHORUS...

  5. Saturable inductor and transformer structures for magnetic pulse compression

    DOE Patents [OSTI]

    Birx, Daniel L.; Reginato, Louis L.

    1990-01-01

    Saturable inductor and transformer for magnetic compression of an electronic pulse, using a continuous electrical conductor looped several times around a tightly packed core of saturable inductor material.

  6. Eliminate Inappropriate Uses of Compressed Air | Department of...

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

    Air (August 2004) More Documents & Publications Save Energy Now in Your Motor-Driven Systems Alternative Strategies for Low Pressure End Uses Minimize Compressed Air Leaks

  7. Pdc - The Worldwide Leader in Hydrogen Refueling Station Compression...

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

    Pdc - The Worldwide Leader in Hydrogen Refueling Station Compression Pdc - The Worldwide ... Report CX-100223 Categorical Exclusion Determination Air Products Hydrogen Energy Systems

  8. Evaluation of the Compressed Air Challenge Training Program:...

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

    Air Challenge Training Program: Executive Summary This is the executive summary of a report on an evaluation of the Compressed Air Challenge (CAC) training program, which was ...

  9. Evaluation of the Compressed Air Challenge Training Program: Executive Summary

    Broader source: Energy.gov [DOE]

    This is the executive summary of a report on an evaluation of the Compressed Air Challenge (CAC) training program, which was designed to provide plant personnel and compressed air system vendors with knowledge and tools required to effect improvements to the energy efficiency and overall performance of plant compressed air systems. The evaluation is based on three main research tasks: analysis of the CAC registration database, interviews with 100 end-user personnel who attended the CAC training, and interviews with 100 compressed air system vendors and consulting engineers who attended the training sessions.

  10. ASE/CAGI Meeting about Compressors and Compressed Air System...

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

    of energy efficiency advocacy organizations met with staff and members of the Compressed Air and Gas Institute ... PDF icon Meetingsummary.pdf More Documents & Publications ...

  11. Practicality of magnetic compression for plasma density control...

    Office of Scientific and Technical Information (OSTI)

    control Citation Details In-Document Search This content will become publicly available on March 16, 2017 Title: Practicality of magnetic compression for plasma density control ...

  12. Fuel-Free Compressed-Air Energy Storage: Fuel-Free, Ubiquitous Compressed-Air Energy Storage and Power Conditioning

    SciTech Connect (OSTI)

    2010-09-13

    GRIDS Project: General Compression has developed a transformative, near-isothermal compressed air energy storage system (GCAES) that prevents air from heating up during compression and cooling down during expansion. When integrated with renewable generation, such as a wind farm, intermittent energy can be stored in compressed air in salt caverns or pressurized tanks. When electricity is needed, the process is reversed and the compressed air is expanded to produce electricity. Unlike conventional compressed air energy storage (CAES) projects, no gas is burned to convert the stored high-pressure air back into electricity. The result of this breakthrough is an ultra-efficient, fully shapeable, 100% renewable and carbon-free power product. The GCAES™ system can provide high quality electricity and ancillary services by effectively integrating renewables onto the grid at a cost that is competitive with gas, coal and nuclear generation.

  13. Hall effect in a strong magnetic field: Direct comparisons of compressible magnetohydrodynamics and the reduced Hall magnetohydrodynamic equations

    SciTech Connect (OSTI)

    Martin, L. N.; Dmitruk, P.; Gomez, D. O.

    2010-11-15

    In this work we numerically test a model of Hall magnetohydrodynamics in the presence of a strong mean magnetic field: the reduced Hall magnetohydrodynamic model (RHMHD) derived by [Gomez et al., Phys. Plasmas 15, 102303 (2008)] with the addition of weak compressible effects. The main advantage of this model lies in the reduction of computational cost. Nevertheless, up until now the degree of agreement with the original Hall MHD system and the range of validity in a regime of turbulence were not established. In this work direct numerical simulations of three-dimensional Hall MHD turbulence in the presence of a strong mean magnetic field are compared with simulations of the weak compressible RHMHD model. The results show that the degree of agreement is very high (when the different assumptions of RHMHD, such as spectral anisotropy, are satisfied). Nevertheless, when the initial conditions are isotropic but the mean magnetic field is maintained strong, the results differ at the beginning but asymptotically reach a good agreement at relatively short times. We also found evidence that the compressibility still plays a role in the dynamics of these systems, and the weak compressible RHMHD model is able to capture these effects. In conclusion the weak compressible RHMHD model is a valid approximation of the Hall MHD turbulence in the relevant physical context.

  14. Hidden sector DM models and Higgs physics

    SciTech Connect (OSTI)

    Ko, P.

    2014-06-24

    We present an extension of the standard model to dark sector with an unbroken local dark U(1){sub X} symmetry. Including various singlet portal interactions provided by the standard model Higgs, right-handed neutrinos and kinetic mixing, we show that the model can address most of phenomenological issues (inflation, neutrino mass and mixing, baryon number asymmetry, dark matter, direct/indirect dark matter searches, some scale scale puzzles of the standard collisionless cold dark matter, vacuum stability of the standard model Higgs potential, dark radiation) and be regarded as an alternative to the standard model. The Higgs signal strength is equal to one as in the standard model for unbroken U(1){sub X} case with a scalar dark matter, but it could be less than one independent of decay channels if the dark matter is a dark sector fermion or if U(1){sub X} is spontaneously broken, because of a mixing with a new neutral scalar boson in the models.

  15. Shock compression of low-density foams

    SciTech Connect (OSTI)

    Holmes, N.C.

    1993-07-01

    Shock compression of very low density micro-cellular materials allows entirely new regimes of hot fluid states to be investigated experimentally. Using a two-stage light-gas gun to generate strong shocks, temperatures of several eV are readily achieved at densities of roughly 0.5--1 g/cm{sup 3} in large, uniform volumes. The conditions in these hot, expanded fluids are readily found using the Hugoniot jump conditions. We will briefly describe the basic methodology for sample preparation and experimental measurement of shock velocities. We present data for several materials over a range of initial densities. This paper will explore the applications of these methods for investigations of equations of state and phase diagrams, spectroscopy, and plasma physics. Finally, we discus the need for future work on these and related low-density materials.

  16. Seneca Compressed Air Energy Storage (CAES) Project

    SciTech Connect (OSTI)

    2012-11-30

    This report provides a review and an analysis of potential environmental justice areas that could be affected by the New York State Electric & Gas (NYSEG) compress air energy storage (CAES) project and identifies existing environmental burden conditions on the area and evaluates additional burden of any significant adverse environmental impact. The review assesses the socioeconomic and demographic conditions of the area surrounding the proposed CAES facility in Schuyler County, New York. Schuyler County is one of 62 counties in New York. Schuyler County’s 2010 population of 18,343 makes it one of the least populated counties in the State (U.S. Census Bureau, 2010). This report was prepared for WorleyParsons by ERM and describes the study area investigated, methods and criteria used to evaluate this area, and the findings and conclusions from the evaluation.

  17. Hybrid Vapor Compression Adsorption System: Thermal Storage Using Hybrid Vapor Compression Adsorption System

    SciTech Connect (OSTI)

    2012-01-04

    HEATS Project: UTRC is developing a new climate-control system for EVs that uses a hybrid vapor compression adsorption system with thermal energy storage. The targeted, closed system will use energy during the battery-charging step to recharge the thermal storage, and it will use minimal power to provide cooling or heating to the cabin during a drive cycle. The team will use a unique approach of absorbing a refrigerant on a metal salt, which will create a lightweight, high-energy-density refrigerant. This unique working pair can operate indefinitely as a traditional vapor compression heat pump using electrical energy, if desired. The project will deliver a hot-and-cold battery that provides comfort to the passengers using minimal power, substantially extending the driving range of EVs.

  18. Assessment of the Market for Compressed Air Efficiency Services

    Broader source: Energy.gov [DOE]

    The objective of this report is to provide a comprehensive and balanced view of the market for engineering and consulting services to improve the energy efficiency of plant compressed air systems. The report is intended for use by industrial energy efficiency program operators in developing strategies to encourage the growth of compressed air system efficiency and enhance the quality of the services it offers.

  19. Development of a broadband reflectivity diagnostic for laser driven shock compression experiments

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

    Ali, S. J.; Bolme, C. A.; Collins, G. W.; Jeanloz, R.

    2015-04-01

    A normal - incidence visible and near - infrared Shock Wave Optical Reflectivity Diagnostic (SWORD) was constructed to investigate changes in the optical properties of materials under dynamic laser compression . Documenting wavelength - and time - dependent changes in the optical properties of laser - shock compressed samples has been difficult, primarily due to the small sample sizes and short time scales involved , but we succeeded in doing so by broadening a series of time delayed 800 - nm pulses from an ultra fast Ti: sapphire laser to generate high - intensity broadband light at nanosecond time scalesmore » . This diagnostic was demonstrated over the wavelength range 450 to 1150 nm with up to 16 time displaced spectra during a single shock experiment. Simultaneous off - normal incidence velocity interferometry (VISAR) characterize d the sample under laser - compression , and also provide d a n independent reflectivity measurement at 532 nm wavelength . Lastly, the shock - driven semiconductor - to - metallic transition in germanium was documented by way of reflectivity measurements with 0.5 ns time resolution and a wavelength resolution of 10 nm .« less

  20. Variable valve timing in a homogenous charge compression ignition engine

    DOE Patents [OSTI]

    Lawrence, Keith E.; Faletti, James J.; Funke, Steven J.; Maloney, Ronald P.

    2004-08-03

    The present invention relates generally to the field of homogenous charge compression ignition engines, in which fuel is injected when the cylinder piston is relatively close to the bottom dead center position for its compression stroke. The fuel mixes with air in the cylinder during the compression stroke to create a relatively lean homogeneous mixture that preferably ignites when the piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. The present invention utilizes internal exhaust gas recirculation and/or compression ratio control to control the timing of ignition events and combustion duration in homogeneous charge compression ignition engines. Thus, at least one electro-hydraulic assist actuator is provided that is capable of mechanically engaging at least one cam actuated intake and/or exhaust valve.

  1. Wavelet/scalar quantization compression standard for fingerprint images

    SciTech Connect (OSTI)

    Brislawn, C.M.

    1996-06-12

    US Federal Bureau of Investigation (FBI) has recently formulated a national standard for digitization and compression of gray-scale fingerprint images. Fingerprints are scanned at a spatial resolution of 500 dots per inch, with 8 bits of gray-scale resolution. The compression algorithm for the resulting digital images is based on adaptive uniform scalar quantization of a discrete wavelet transform subband decomposition (wavelet/scalar quantization method). The FBI standard produces archival-quality images at compression ratios of around 15 to 1 and will allow the current database of paper fingerprint cards to be replaced by digital imagery. The compression standard specifies a class of potential encoders and a universal decoder with sufficient generality to reconstruct compressed images produced by any compliant encoder, allowing flexibility for future improvements in encoder technology. A compliance testing program is also being implemented to ensure high standards of image quality and interchangeability of data between different implementations.

  2. Correlation and image compression for limited-bandwidth CCD.

    SciTech Connect (OSTI)

    Thompson, Douglas G.

    2005-07-01

    As radars move to Unmanned Aerial Vehicles with limited-bandwidth data downlinks, the amount of data stored and transmitted with each image becomes more significant. This document gives the results of a study to determine the effect of lossy compression in the image magnitude and phase on Coherent Change Detection (CCD). We examine 44 lossy compression types, plus lossless zlib compression, and test each compression method with over 600 CCD image pairs. We also derive theoretical predictions for the correlation for most of these compression schemes, which compare favorably with the experimental results. We recommend image transmission formats for limited-bandwidth programs having various requirements for CCD, including programs which cannot allow performance degradation and those which have stricter bandwidth requirements at the expense of CCD performance.

  3. Gas conversion opportunities in LILCO's commercial sector

    SciTech Connect (OSTI)

    Pierce, B.

    1993-03-01

    This report presents the results of a preliminary investigation into opportunities for gas conservation in Long Island Lighting Company's commercial sector. It focusses on gas-fired heating equipment. Various sources of data are examined in order to characterize the commercial buildings and equipment in the service territory. Several key pieces of information necessary to predict savings potential are identified. These include the efficiencies and size distribution of existing equipment. Twenty-one specific conservation measures are identified and their applicability is discussed in terms of equipment size. Recommendations include improving the characterization of existing buildings and equipment, and developing a greater understanding of the savings and costs of conservation measures, and their interactions, especially in the middle size range of buildings and equipment.

  4. Interacting vacuum energy in the dark sector

    SciTech Connect (OSTI)

    Chimento, L. P.; Carneiro, S.

    2015-03-26

    We analyse three cosmological scenarios with interaction in the dark sector, which are particular cases of a general expression for the energy flux from vacuum to matter. In the first case the interaction leads to a transition from an unstable de Sitter phase to a radiation dominated universe, avoiding in this way the initial singularity. In the second case the interaction gives rise to a slow-roll power-law inflation. Finally, the third scenario is a concordance model for the late-time universe, with the vacuum term decaying into cold dark matter. We identify the physics behind these forms of interaction and show that they can be described as particular types of the modified Chaplygin gas.

  5. Utility Sector Impacts of Reduced Electricity Demand

    SciTech Connect (OSTI)

    Coughlin, Katie

    2014-12-01

    This report presents a new approach to estimating the marginal utility sector impacts associated with electricity demand reductions. The method uses publicly available data and provides results in the form of time series of impact factors. The input data are taken from the Energy Information Agency's Annual Energy Outlook (AEO) projections of how the electric system might evolve in the reference case, and in a number of side cases that incorporate different effciency and other policy assumptions. The data published with the AEO are used to define quantitative relationships between demand-side electricity reductions by end use and supply-side changes to capacity by plant type, generation by fuel type and emissions of CO2, Hg, NOx and SO2. The impact factors define the change in each of these quantities per unit reduction in site electricity demand. We find that the relative variation in these impacts by end use is small, but the time variation can be significant.

  6. Solar Photovoltaic Financing: Residential Sector Deployment

    SciTech Connect (OSTI)

    Coughlin, J.; Cory, K.

    2009-03-01

    This report presents the information that homeowners and policy makers need to facilitate PV financing at the residential level. The full range of cash payments, bill savings, and tax incentives is covered, as well as potentially available solar attribute payments. Traditional financing is also compared to innovative solutions, many of which are borrowed from the commercial sector. Together, these mechanisms are critical for making the economic case for a residential PV installation, given its high upfront costs. Unfortunately, these programs are presently limited to select locations around the country. By calling attention to these innovative initiatives, this report aims to help policy makers consider greater adoption of these models to benefit homeowners interested installing a residential PV system.

  7. Working to Achieve Cybersecurity in the Energy Sector | Department of

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

    Energy Working to Achieve Cybersecurity in the Energy Sector Working to Achieve Cybersecurity in the Energy Sector Presentation covers cybersecurity in the energy sector and is given at the Spring 2011 Federal Utility Partnership Working Group (FUPWG) meeting. PDF icon fupwg_spring11_wells.pdf More Documents & Publications DOE/OE National SCADA Test Bed Fiscal Year 2009 Work Plan Cybersecurity for Energy Delivery Systems 2010 Peer Review Cybersecurity for Energy Delivery Systems (CEDS)

  8. Workforce Training for the Electric Power Sector: Map of Projects |

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

    Department of Energy Map of Projects Workforce Training for the Electric Power Sector: Map of Projects Map showing the number of projects awarded in each State through the Workforce Training for the Electric Power Sector grants under the American Recovery and Reinvestment Act. PDF icon Workforce Training for the Electric Power Sector: Map of Projects More Documents & Publications Smart Grid Investment Grants: Map of Projects Developing and Enhancing Workforce Training Programs: Number of

  9. Designing Effective State Programs for the Industrial Sector - New SEE

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

    Action Publication | Department of Energy Designing Effective State Programs for the Industrial Sector - New SEE Action Publication Designing Effective State Programs for the Industrial Sector - New SEE Action Publication March 24, 2014 - 12:56pm Addthis Industrial Energy Efficiency: Designing Effective State Programs for the Industrial Sector provides state regulators, utilities, and other program administrators with an overview of U.S. industrial energy efficiency programs delivered by a

  10. Partnership for Energy Sector Climate Resilience | Department of Energy

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

    Partnership for Energy Sector Climate Resilience Partnership for Energy Sector Climate Resilience The Partnership for Energy Sector Climate Resilience is an initiative to enhance U.S. energy security by improving the resilience of energy infrastructure to extreme weather and climate change impacts. The goal is to accelerate investment in technologies, practices, and policies that will enable a resilient 21st century energy system. Under this Partnership, owners and operators of energy assets

  11. System Dynamics Model | NISAC

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

    NISACSystem Dynamics Model

  12. Workforce Training for the Electric Power Sector: Awards

    Broader source: Energy.gov [DOE]

    List of Workforce Training Awards for the Electric Power Sector under the American Recovery and Reinvestment Act organized by state, including, city, recipients, type of project, description,...

  13. Designing Effective State Programs for the Industrial Sector...

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

    Designing Effective State Programs for the Industrial Sector - New SEE Action Publication March 24, 2014 - 12:56pm Addthis Industrial Energy Efficiency: Designing Effective State ...

  14. Public Finance Mechanisms to Catalyze Sustainable Energy Sector...

    Open Energy Info (EERE)

    all aspects of the sector including technology innovation, project development, (SME) business and industry support, consumer awareness and end-user finance. Regardless of...

  15. DOE Encourages Utility Sector Nominations to Commerce Department...

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

    Commerce Department's Spectrum Advisory Committee DOE Encourages Utility Sector Nominations to Commerce Department's Spectrum Advisory Committee December 14, 2010 - 5:40pm Addthis...

  16. Accounting for Co-benefits in Asia's Transportation Sector: Methods...

    Open Energy Info (EERE)

    Methods and Applications Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Accounting for Co-benefits in Asia's Transportation Sector: Methods and Applications...

  17. NREL's Enhanced Scenario Framework for Electricity Sector Analysis...

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

    NREL's Enhanced Scenario Framework for Electricity Sector Analysis Provides Cost, ... October 19, 2015 Projections of potential energy futures are highly dependent on the ...

  18. User:GregZiebold/Sector test | Open Energy Information

    Open Energy Info (EERE)

    search Query all sector types for Companies: Bioenergy Biofuels Biomass Buildings Carbon Efficiency Geothermal energy Hydro Hydrogen Marine and Hydrokinetic Ocean Renewable Energy...

  19. DOE has published the revised 2010 Energy Sector Specific Plan

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Department of Energy announces the publication of the Energy Sector-Specific Plan: An Annex to the National Infrastructure Protection Plan 2010.

  20. The Greenhouse Gas Protocol Initiative: Sector Specific Tools...

    Open Energy Info (EERE)

    World Resources Institute, World Business Council for Sustainable Development Sector: Energy, Climate Focus Area: Industry, Greenhouse Gas Phase: Determine Baseline, Evaluate...

  1. International Energy Outlook 2016-Industrial sector energy consumption...

    Gasoline and Diesel Fuel Update (EIA)

    Industrial sector energy consumption also includes basic chemical feedstocks. Natural gas ... For any given amount of chemical output, depending on the fundamental chemical process of ...

  2. Changes in Energy Intensity in the Manufacturing Sector 1985...

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

    (34) Machinery (35) El. Equip.(36) Instruments (38) Misc. (39) Appendices Survey Design Quality of Data Sector Description Nonobservation Errors Glossary Intensity Sites...

  3. Oak Ridge Reservation Emergency Sectors Changing | Y-12 National...

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

    pertaining to their safety will be issued by sector," said Jim Bassham, Director of TEMA. "Periodic updates to emergency plans, like these changes, are part of TEMA's normal...

  4. Climate Change and China's Agricultural Sector: An Overview of...

    Open Energy Info (EERE)

    An Overview of Impacts, Adaptation and Mitigation Jump to: navigation, search Name Climate Change and China's Agricultural Sector: An Overview of Impacts, Adaptation and...

  5. Climate Change Mitigation in the Energy and Forestry Sectors...

    Open Energy Info (EERE)

    of Developing Countries Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Climate Change Mitigation in the Energy and Forestry Sectors of Developing Countries...

  6. Controlling Methane Emissions in the Natural Gas Sector: A Review...

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

    Methane Emissions in the Natural Gas Sector: A Review of Federal & State Regulatory Frameworks Governing Production, Processing, Transmission, and Distribution Controlling Methane ...

  7. Commercial Sector Demand Module of the National Energy Modeling...

    Gasoline and Diesel Fuel Update (EIA)

    the State Energy Data System (SEDS) historical commercial sector consumption, applying an additive correction term to ensure that simulated model results correspond to published...

  8. Land Transport Sector in Bangladesh: An Analysis Toward Motivating...

    Open Energy Info (EERE)

    Toward Motivating GHG Emission Reduction Strategies Jump to: navigation, search Name Land Transport Sector in Bangladesh: An Analysis Toward Motivating GHG Emission Reduction...

  9. Indonesia-NAMA Programme for the Construction Sector in Asia...

    Open Energy Info (EERE)

    United Nations Environment Programme (UNEP) Sector Climate Focus Area Renewable Energy, Buildings, Industry Topics Low emission development planning, -LEDS, -NAMA, Market...

  10. Thailand-NAMA Programme for the Construction Sector in Asia ...

    Open Energy Info (EERE)

    United Nations Environment Programme (UNEP) Sector Climate Focus Area Renewable Energy, Buildings, Industry Topics Low emission development planning, -LEDS, -NAMA, Market...

  11. Philippines-NAMA Programme for the Construction Sector in Asia...

    Open Energy Info (EERE)

    United Nations Environment Programme (UNEP) Sector Climate Focus Area Renewable Energy, Buildings, Industry Topics Low emission development planning, -LEDS, -NAMA, Market...

  12. Vietnam-NAMA Programme for the Construction Sector in Asia |...

    Open Energy Info (EERE)

    United Nations Environment Programme (UNEP) Sector Climate Focus Area Renewable Energy, Buildings, Industry Topics Low emission development planning, -LEDS, -NAMA, Market...

  13. Malaysia-NAMA Programme for the Construction Sector in Asia ...

    Open Energy Info (EERE)

    United Nations Environment Programme (UNEP) Sector Climate Focus Area Renewable Energy, Buildings, Industry Topics Low emission development planning, -LEDS, -NAMA, Market...

  14. Energy: Critical Infrastructure and Key Resources Sector-Specific...

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

    Energy: Critical Infrastructure and Key Resources Sector-Specific Plan as input to the National Infrastructure Protection Plan (Redacted) Energy: Critical Infrastructure and Key ...

  15. Energy Critical Infrastructure and Key Resources Sector-Specific...

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

    Energy Critical Infrastructure and Key Resources Sector-Specific Plan as input to the National Infrastructure Protection Plan (Redacted) Energy Critical Infrastructure and Key ...

  16. Energy Efficiency Financing for Public Sector Projects | Department...

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

    Info Sector Name State Administrator California Energy Commission Website http:www.energy.ca.govefficiencyfinancingindex.html State California Program Type Loan Program...

  17. Low Carbon Growth Plans: A Sectoral Approach to Climate Protection...

    Open Energy Info (EERE)

    to Climate Protection Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Low Carbon Growth Plans: A Sectoral Approach to Climate Protection AgencyCompany Organization:...

  18. Assess institutional frameworks for LEDS for land-use sector...

    Open Energy Info (EERE)

    Energy in Low Income Countries (SREP) Nepal-Sectoral Climate Impacts Economic Assessment Nepal-UNEP Green Economy Advisory Services Nicaragua-Joint Programme on Resource...

  19. Cameroon-Forest Sector Development in a Difficult Political Economy...

    Open Energy Info (EERE)

    Bank Sector Land Focus Area Forestry Topics Implementation, Market analysis Resource Type Lessons learnedbest practices Website http:lnweb90.worldbank.orgo Country Cameroon UN...

  20. EFFECT OF COMPRESSION ON CONDUCTIVITY AND MORPHOLOGY OF PFSA MEMBRANES

    SciTech Connect (OSTI)

    Kusoglu, Ahmet; Weber, Adam; Jiang, Ruichin; Gittleman, Craig

    2011-07-20

    Polymer-Electrolyte-Fuel-Cells (PEFCs) are promising candidates for powering vehicles and portable devices using renewable-energy sources. The core of a PEFC is the solid electrolyte membrane that conducts protons from anode to cathode, where water is generated. The conductivity of the membrane, however, depends on the water content of the membrane, which is strongly related to the cell operating conditions. The membrane and other cell components are typically compressed to minimize various contact resistances. Moreover, the swelling of a somewhat constrained membrane in the cell due to the humidity changes generates additional compressive stresses in the membrane. These external stresses are balanced by the internal swelling pressure of the membrane and change the swelling equilibrium. It was shown using a fuel-cell setup that compression could reduce the water content of the membrane or alter the cell resistance. Nevertheless, the effect of compression on the membrane’s transport properties is yet to be understood, as well as its implications in the structure-functions relationships of the membrane. We previously studied, both experimentally and theoretically, how compression affects the water content of the membrane.6 However, more information is required the gain a fundamental understanding of the compression effects. In this talk, we present the results of our investigation on the in-situ conductivity of the membrane as a function of humidity and cell compression pressure. Moreover, to better understand the morphology of compressed membrane, small-angle X-ray-scattering (SAXS) experiments were performed. The conductivity data is then analyzed by investigating the size of the water domains of the compressed membrane determined from the SAXS measurements.

  1. Analyses of Compressed Hydrogen On-Board Storage Systems | Department of

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

    Energy Compressed Hydrogen On-Board Storage Systems Analyses of Compressed Hydrogen On-Board Storage Systems Presented at the R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops on February 14 and 15, 2011. PDF icon compressed_hydrogen2011_3_rosenfeld.pdf More Documents & Publications Technical Assessment of Compressed Hydrogen Storage Tank Systems for Automotive Applications Analyses of Hydrogen Storage Materials and On-Board

  2. Lossy compression of weak lensing data (Journal Article) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Lossy compression of weak lensing data Citation Details In-Document Search Title: Lossy compression of weak lensing data You are accessing a document from the Department of...

  3. Lossy compression of weak lensing data (Journal Article) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Lossy compression of weak lensing data Citation Details In-Document Search Title: Lossy compression of weak lensing data Future orbiting observatories will survey...

  4. FUJIFILM Hunt Chemicals U.S.A. Achieves Compressed Air System...

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

    implemented a comprehensive, compressed air system energy-reduction strategy at its ... Hunt Chemicals U.S.A. Achieves Compressed Air System Energy-Reduction Goals with a ...

  5. Antineutrino Oscillations in the Atmospheric Sector

    SciTech Connect (OSTI)

    Himmel, Alexander I.; /Caltech

    2011-05-01

    This thesis presents measurements of the oscillations of muon antineutrinos in the atmospheric sector, where world knowledge of antineutrino oscillations lags well behind the knowledge of neutrinos, as well as a search for {nu}{sub {mu}} {yields} {bar {nu}}{sub {mu}} transitions. Differences between neutrino and antineutrino oscillations could be a sign of physics beyond the Standard Model, including non-standard matter interactions or the violation of CPT symmetry. These measurements leverage the sign-selecting capabilities of the magnetized steel-scintillator MINOS detectors to analyze antineutrinos from the NuMI beam, both when it is in neutrino-mode and when it is in antineutrino-mode. Antineutrino oscillations are observed at |{Delta}{bar m}{sub atm}{sup 2}| = (3.36{sub -0.40}{sup +0.46}(stat) {+-} 0.06(syst)) x 10{sup -3} eV{sup 2} and sin{sup 2}(2{bar {theta}}{sub 23}) = 0.860{sub -0.12}{sup +0.11}(stat) {+-} 0.01(syst). The oscillation parameters measured for antineutrinos and those measured by MINOS for neutrinos differ by a large enough margin that the chance of obtaining two values as discrepant as those observed is only 2%, assuming the two measurements arise from the same underlying mechanism, with the same parameter values. No evidence is seen for neutrino-to-antineutrino transitions.

  6. Selective document image data compression technique

    DOE Patents [OSTI]

    Fu, Chi-Yung; Petrich, Loren I.

    1998-01-01

    A method of storing information from filled-in form-documents comprises extracting the unique user information in the foreground from the document form information in the background. The contrast of the pixels is enhanced by a gamma correction on an image array, and then the color value of each of pixel is enhanced. The color pixels lying on edges of an image are converted to black and an adjacent pixel is converted to white. The distance between black pixels and other pixels in the array is determined, and a filled-edge array of pixels is created. User information is then converted to a two-color format by creating a first two-color image of the scanned image by converting all pixels darker than a threshold color value to black. All the pixels that are lighter than the threshold color value to white. Then a second two-color image of the filled-edge file is generated by converting all pixels darker than a second threshold value to black and all pixels lighter than the second threshold color value to white. The first two-color image and the second two-color image are then combined and filtered to smooth the edges of the image. The image may be compressed with a unique Huffman coding table for that image. The image file is also decimated to create a decimated-image file which can later be interpolated back to produce a reconstructed image file using a bilinear interpolation kernel.--(235 words)

  7. Selective document image data compression technique

    DOE Patents [OSTI]

    Fu, C.Y.; Petrich, L.I.

    1998-05-19

    A method of storing information from filled-in form-documents comprises extracting the unique user information in the foreground from the document form information in the background. The contrast of the pixels is enhanced by a gamma correction on an image array, and then the color value of each of pixel is enhanced. The color pixels lying on edges of an image are converted to black and an adjacent pixel is converted to white. The distance between black pixels and other pixels in the array is determined, and a filled-edge array of pixels is created. User information is then converted to a two-color format by creating a first two-color image of the scanned image by converting all pixels darker than a threshold color value to black. All the pixels that are lighter than the threshold color value to white. Then a second two-color image of the filled-edge file is generated by converting all pixels darker than a second threshold value to black and all pixels lighter than the second threshold color value to white. The first two-color image and the second two-color image are then combined and filtered to smooth the edges of the image. The image may be compressed with a unique Huffman coding table for that image. The image file is also decimated to create a decimated-image file which can later be interpolated back to produce a reconstructed image file using a bilinear interpolation kernel. 10 figs.

  8. Ramp Compression of Diamond to 5 TPa: Experiments Taking Carbon...

    Office of Scientific and Technical Information (OSTI)

    Title: Ramp Compression of Diamond to 5 TPa: Experiments Taking Carbon to the Thomas-Fermi-Dirac Regime Authors: Smith, R F ; Eggert, J H ; Jeanloz, R ; Duffy, T S ; Braun, D G ; ...

  9. Technical Assessment of Compressed Hydrogen Storage Tank Systems...

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

    TIAX LLC) were estimated for compressed hydrogen storage tanks with design pressures of 350 bar (5000 psi) and 700 bar (10,000 psi) capable of storing 5.6 kg of usable hydrogen. ...

  10. Improving Compressed Air System Performance: A Sourcebook for Industry

    SciTech Connect (OSTI)

    2003-11-01

    NREL will produce this sourcebook for DOE's Industrial Technologies Office as part of a series of documents on industrial energy equipment. The sourcebook is a reference for industrial compressed air system users, outlining opportunities to improve system efficiency.

  11. Business Case for Compressed Natural Gas in Municipal Fleets

    SciTech Connect (OSTI)

    Johnson, C.

    2010-06-01

    This report describes how NREL used the CNG Vehicle and Infrastructure Cash-Flow Evaluation (VICE) model to establish guidance for fleets making decisions about using compressed natural gas.

  12. Portal, ND Compressed Natural Gas Exports to Canada (Dollars...

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

    Dollars per Thousand Cubic Feet) Portal, ND Compressed Natural Gas Exports to Canada (Dollars per Thousand Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2015 ...

  13. Portal, ND Compressed Natural Gas Exports to Canada (Million...

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

    Million Cubic Feet) Portal, ND Compressed Natural Gas Exports to Canada (Million Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2015 0 2 - No Data Reported; -- ...

  14. Calais, ME Compressed Natural Gas Exports to Canada (Dollars...

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

    Dollars per Thousand Cubic Feet) Calais, ME Compressed Natural Gas Exports to Canada (Dollars per Thousand Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2013 ...

  15. Compressed Houlton, ME Natural Gas Imports from Canada (Million...

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

    Houlton, ME Natural Gas Imports from Canada (Million Cubic Feet) Compressed Houlton, ME Natural Gas Imports from Canada (Million Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug ...

  16. Calais, ME Compressed Natural Gas Exports to Canada (Million...

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

    Million Cubic Feet) Calais, ME Compressed Natural Gas Exports to Canada (Million Cubic Feet) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2013 1 24 19 15 3 8 23 22 2014 32 ...

  17. Webinar: Update to the 700 bar Compressed Hydrogen Storage System...

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

    will present a live webinar titled "Update to the 700 bar Compressed Hydrogen Storage System Cost Projection" on Tuesday, January 26, from 12 to 1 p.m. Eastern Standard Time. ...

  18. High Fidelity Modeling of Premixed Charge Compression Ignition Engines

    Broader source: Energy.gov [DOE]

    Most accurate and detailed chemical kinetic models for fuels of practical interest to engine manufacturers and fuels developers are applied for high fidelity engine analysis of premixed charge compression ignition engines.

  19. High compressibility of a flexible metalorganic framework

    SciTech Connect (OSTI)

    Serra-Crespo P.; Stavitski E.; Kapteijn, F.; Gascon, J.

    2012-03-22

    The metal-organic framework NH{sub 2}-MIL-53(In) shows a very high amorphization resistance (>20 GPa) together with a large compressibility (K{sub 0} = 10.9 GPa).

  20. Gasoline Compression Ignition - Start of Injection Timing Sweep...

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

    Contact Us For more information, contact Greg Cunningham at (630) 252-8232 or media@anl.gov. Gasoline Compression Ignition - Start of Injection Timing Sweep (VERIFI) Share Topic...

  1. Hybrid Rotor Compression for Multiphase and Liquids-Rich Wellhead

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

    but also allows for compression of wet gas, or gas that contains liquid content. At many natural gas wellheads, liquids-typically heavier hydrocarbons and water-are present in the...

  2. Copper laser modulator driving assembly including a magnetic compression laser

    DOE Patents [OSTI]

    Cook, Edward G.; Birx, Daniel L.; Ball, Don G.

    1994-01-01

    A laser modulator (10) having a low voltage assembly (12) with a plurality of low voltage modules (14) with first stage magnetic compression circuits (20) and magnetic assist inductors (28) with a common core (91), such that timing of the first stage magnetic switches (30b) is thereby synchronized. A bipolar second stage of magnetic compression (42) is coupled to the low voltage modules (14) through a bipolar pulse transformer (36) and a third stage of magnetic compression (44) is directly coupled to the second stage of magnetic compression (42). The low voltage assembly (12) includes pressurized boxes (117) for improving voltage standoff between the primary winding assemblies (34) and secondary winding (40) contained therein.

  3. Pre-In-Plant Training Webinar (Compressed Air)

    Broader source: Energy.gov [DOE]

    This pre-In-Plant training webinar for the Better Plants Program covers the basics of finding energy savings in Compressed Air systems and introduces the AIRMaster+ software tool.

  4. Business Case for Compressed Natural Gas in Municipal Fleets

    Broader source: Energy.gov [DOE]

    This report describes how NREL used the CNG Vehicle and Infrastructure Cash-Flow Evaluation (VICE) model to establish guidance for fleets making decisions about using compressed natural gas.

  5. Starting low compression ratio rotary Wankel diesel engine

    SciTech Connect (OSTI)

    Kamo, R.; Yamada, T.Y.; Hamada, Y.

    1987-01-01

    The single stage rotary Wankel engine is difficult to convert into a diesel version having an adequate compression ratio and a compatible combustion chamber configuration. Past efforts in designing a rotary-type Wankel diesel engine resorted to a two-stage design. Complexity, size, weight, cost and performance penalties were some of the drawbacks of the two-stage Wankel-type diesel designs. This paper presents an approach to a single stage low compression ratio Wankel-type rotary engine. Cold starting of a low compression ratio single stage diesel Wankel becomes the key problem. It was demonstrated that the low compression single stage diesel Wankel type rotary engine can satisfactorily be cold started with a properly designed combustion chamber in the rotor and a variable heat input combustion aid.

  6. MHK Technologies/Ocean Powered Compressed Air Stations | Open...

    Open Energy Info (EERE)

    Description The Ocean Powered Compressed Air Station is a point absorber that uses an air pump to force air to a landbased generator The device only needs 4m water depth and...

  7. Hydrogen Station Compression, Storage, and Dispensing Technical Status and

    Office of Scientific and Technical Information (OSTI)

    Costs: Systems Integration (Technical Report) | SciTech Connect Technical Report: Hydrogen Station Compression, Storage, and Dispensing Technical Status and Costs: Systems Integration Citation Details In-Document Search Title: Hydrogen Station Compression, Storage, and Dispensing Technical Status and Costs: Systems Integration At the request of the U.S. Department of Energy Fuel Cell Technologies Office (FCTO), the National Renewable Energy Laboratory commissioned an independent review of

  8. Microfabricated Optical Compressive Load Sensors (Conference) | SciTech

    Office of Scientific and Technical Information (OSTI)

    Connect Microfabricated Optical Compressive Load Sensors Citation Details In-Document Search Title: Microfabricated Optical Compressive Load Sensors Authors: Cole, G D ; Lin, K L ; Petersen, H E ; Kotovsky, J Publication Date: 2007-07-02 OSTI Identifier: 1124985 Report Number(s): UCRL-PROC-232467 DOE Contract Number: W-7405-ENG-48 Resource Type: Conference Resource Relation: Conference: Presented at: IEEE Sensors 2007, Atlanta, GA, United States, Oct 28 - Oct 31, 2007 Research Org: Lawrence

  9. Microfabricated Optical Compressive Load Sensors (Conference) | SciTech

    Office of Scientific and Technical Information (OSTI)

    Connect Microfabricated Optical Compressive Load Sensors Citation Details In-Document Search Title: Microfabricated Optical Compressive Load Sensors × You are accessing a document from the Department of Energy's (DOE) SciTech Connect. This site is a product of DOE's Office of Scientific and Technical Information (OSTI) and is provided as a public service. Visit OSTI to utilize additional information resources in energy science and technology. A paper copy of this document is also available

  10. Graphene physics and insulator-metal transition in compressed hydrogen

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | DOE PAGES Graphene physics and insulator-metal transition in compressed hydrogen Title: Graphene physics and insulator-metal transition in compressed hydrogen Authors: Naumov, Ivan I. ; Cohen, R. E. ; Hemley, Russell J. Publication Date: 2013-07-22 OSTI Identifier: 1104286 Type: Publisher's Accepted Manuscript Journal Name: Physical Review B Additional Journal Information: Journal Volume: 88; Journal Issue: 4; Journal ID: ISSN 1098-0121 Publisher: American Physical

  11. Compression set in Gas Blown Condensation Cured Polysiloxane Elastomers

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Compression set in Gas Blown Condensation Cured Polysiloxane Elastomers Citation Details In-Document Search Title: Compression set in Gas Blown Condensation Cured Polysiloxane Elastomers Authors: Patel, M ; Chinn, S C ; Maxwell, R S ; Wilson, T S ; Birdsell, S A Publication Date: 2010-06-28 OSTI Identifier: 1124817 Report Number(s): LLNL-JRNL-439176 DOE Contract Number: W-7405-ENG-48 Resource Type: Journal Article Resource Relation: Journal Name: Polymer

  12. COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our Renewable

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

    Energy Future | Princeton Plasma Physics Lab April 30, 2014, 4:00pm to 5:30pm Colloquia MBG Auditorium COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our Renewable Energy Future Mr. Al Cavallo Consultant Compressed air energy storage (CAES) is a proven, cost effective, environmentally acceptable technology for storing extremely large amounts of energy. Invented in the 1950s in Germany, and based on widely available gas turbine equipment, two CAES plants have been built and have

  13. Costs Associated With Compressed Natural Gas Vehicle Fueling Infrastructure

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    Costs Associated With Compressed Natural Gas Vehicle Fueling Infrastructure Factors to consider in the implementation of fueling stations and equipment Margaret Smith, New West Technologies (DOE HQ Technical Support) John Gonzales, National Renewable Energy Laboratory This document has been peer reviewed by the natural gas industry. September 2014 2 Introduction This document is designed to help fleets understand the cost factors associated with fueling infrastructure for compressed natural gas

  14. A technique for measuring compressive properties of single microballoons :

    Office of Scientific and Technical Information (OSTI)

    comparison of carbon microballoons of varying tap densities (Conference) | SciTech Connect SciTech Connect Search Results Conference: A technique for measuring compressive properties of single microballoons : comparison of carbon microballoons of varying tap densities Citation Details In-Document Search Title: A technique for measuring compressive properties of single microballoons : comparison of carbon microballoons of varying tap densities A technique has been developed to obtain

  15. Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder |

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

    Department of Energy Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder Defect Analysis of Vehicle Compressed Natural Gas Composite Cylinder These slides were presented at the Onboard Storage Tank Workshop on April 29, 2010. PDF icon defectanalysis_naturalgas_ostw.pdf More Documents & Publications Safety analysis of in-use vehicle wrapping cylinder International Hydrogen Fuel and Pressure Vessel Forum 2010 Proceedings Type 4 Tank Testing, Certification and Field

  16. The compressibility of cubic white, orthorhombic black and rhombohedral

    Office of Scientific and Technical Information (OSTI)

    black phosphorus (Journal Article) | SciTech Connect Journal Article: The compressibility of cubic white, orthorhombic black and rhombohedral black phosphorus Citation Details In-Document Search Title: The compressibility of cubic white, orthorhombic black and rhombohedral black phosphorus The effect of pressure on the crystal structure of white phosphorus has been studied up to 22.4 GPa. The {alpha} phase was found to transform into the {alpha}' phase at 0.87 {+-} 0.04 GPa with a volume

  17. Hot compression process for making edge seals for fuel cells

    DOE Patents [OSTI]

    Dunyak, Thomas J.; Granata, Jr., Samuel J.

    1994-01-01

    A hot compression process for forming integral edge seals in anode and cade assemblies wherein the assemblies are made to a nominal size larger than a finished size, beads of AFLAS are applied to a band adjacent the peripheral margins on both sides of the assemblies, the assemblies are placed in a hot press and compressed for about five minutes with a force sufficient to permeate the peripheral margins with the AFLAS, cooled and cut to finished size.

  18. Comparison of Conventional Diesel and Reactivity Controlled Compression

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

    Ignition (RCCI) Combustion in a Light-Duty Engine | Department of Energy CFD modeling was used to compare conventional diesel and dual-fuel Reactivity Controlled Compression Ignition combustion at US Tier 2 Bin 5 NOx levels, while accounting for Diesel Exhaust Fluid needed to meet NOx constraints with aftertreatment. PDF icon deer12_reitz.pdf More Documents & Publications Optimization of Advanced Diesel Engine Combustion Strategies High Efficiency Fuel Reactivity Controlled Compression

  19. SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) 2013

    SciTech Connect (OSTI)

    Gordon Rueff; Lyle Roybal; Denis Vollmer

    2013-01-01

    There is a significant need to protect the nations energy infrastructures from malicious actors using cyber methods. Supervisory, Control, and Data Acquisition (SCADA) systems may be vulnerable due to the insufficient security implemented during the design and deployment of these control systems. This is particularly true in older legacy SCADA systems that are still commonly in use. The purpose of INLs research on the SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) project was to determine if and how data compression techniques could be used to identify and protect SCADA systems from cyber attacks. Initially, the concept was centered on how to train a compression algorithm to recognize normal control system traffic versus hostile network traffic. Because large portions of the TCP/IP message traffic (called packets) are repetitive, the concept of using compression techniques to differentiate non-normal traffic was proposed. In this manner, malicious SCADA traffic could be identified at the packet level prior to completing its payload. Previous research has shown that SCADA network traffic has traits desirable for compression analysis. This work investigated three different approaches to identify malicious SCADA network traffic using compression techniques. The preliminary analyses and results presented herein are clearly able to differentiate normal from malicious network traffic at the packet level at a very high confidence level for the conditions tested. Additionally, the master dictionary approach used in this research appears to initially provide a meaningful way to categorize and compare packets within a communication channel.

  20. Commercial Sector Financing Needs and Opportunities | Department of Energy

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

    A conceptual vapor-compression cycle design (left of storage tanks) for the commercial integrated heat pump, as well as a conceptual representation of how this packaged rooftop unit would integrate with the water heating system of a commercial building (solar water heater optional). Image credit: Oak Ridge National Laboratory. A conceptual vapor-compression cycle design (left of storage tanks) for the commercial integrated heat pump, as well as a conceptual representation of how this packaged

  1. Seneca Compressed Air Energy Storage (CAES) Project

    SciTech Connect (OSTI)

    2012-11-30

    Compressed Air Energy Storage (CAES) is a hybrid energy storage and generation concept that has many potential benefits especially in a location with increasing percentages of intermittent wind energy generation. The objectives of the NYSEG Seneca CAES Project included: for Phase 1, development of a Front End Engineering Design for a 130MW to 210 MW utility-owned facility including capital costs; project financials based on the engineering design and forecasts of energy market revenues; design of the salt cavern to be used for air storage; draft environmental permit filings; and draft NYISO interconnection filing; for Phase 2, objectives included plant construction with a target in-service date of mid-2016; and for Phase 3, objectives included commercial demonstration, testing, and two-years of performance reporting. This Final Report is presented now at the end of Phase 1 because NYSEG has concluded that the economics of the project are not favorable for development in the current economic environment in New York State. The proposed site is located in NYSEG’s service territory in the Town of Reading, New York, at the southern end of Seneca Lake, in New York State’s Finger Lakes region. The landowner of the proposed site is Inergy, a company that owns the salt solution mining facility at this property. Inergy would have developed a new air storage cavern facility to be designed for NYSEG specifically for the Seneca CAES project. A large volume, natural gas storage facility owned and operated by Inergy is also located near this site and would have provided a source of high pressure pipeline quality natural gas for use in the CAES plant. The site has an electrical take-away capability of 210 MW via two NYSEG 115 kV circuits located approximately one half mile from the plant site. Cooling tower make-up water would have been supplied from Seneca Lake. NYSEG’s engineering consultant WorleyParsons Group thoroughly evaluated three CAES designs and concluded that any of the designs would perform acceptably. Their general scope of work included development of detailed project construction schedules, capital cost and cash flow estimates for both CAES cycles, and development of detailed operational data, including fuel and compression energy requirements, to support dispatch modeling for the CAES cycles. The Dispatch Modeling Consultant selected for this project was Customized Energy Solutions (CES). Their general scope of work included development of wholesale electric and gas market price forecasts and development of a dispatch model specific to CAES technologies. Parsons Brinkerhoff Energy Storage Services (PBESS) was retained to develop an air storage cavern and well system design for the CAES project. Their general scope of work included development of a cavern design, solution mining plan, and air production well design, cost, and schedule estimates for the project. Detailed Front End Engineering Design (FEED) during Phase 1 of the project determined that CAES plant capital equipment costs were much greater than the $125.6- million originally estimated by EPRI for the project. The initial air storage cavern Design Basis was increased from a single five million cubic foot capacity cavern to three, five million cubic foot caverns with associated air production wells and piping. The result of this change in storage cavern Design Basis increased project capital costs significantly. In addition, the development time required to complete the three cavern system was estimated at approximately six years. This meant that the CAES plant would initially go into service with only one third of the required storage capacity and would not achieve full capability until after approximately five years of commercial operation. The market price forecasting and dispatch modeling completed by CES indicated that the CAES technologies would operate at only 10 to 20% capacity factors and the resulting overall project economics were not favorable for further development. As a result of all of these factors, the Phase 1 FEED developed an installed CAES plant cost estimate of approximately $2,300/KW for the 210MW CAES 1A and 2 cycles. The capital cost for the 136 MW CAES 1 cycle was even higher due to the lower generating capacity of the cycle. Notably, the large equipment could have generated additional capacity (up to 270MW) which would have improved the cost per KW; however, the output was limited by the night time transmission system capability. The research herein, therefore, is particular to the site-specific factors that influenced the design and the current and forecasted generation mix and energy prices in Upstate New York and may not necessarily indicate that CAES plants cannot be economically constructed in other places in New York State or the world.

  2. Technical Assessment of Cryo-Compressed Hydrogen Storage Tank Systems for Automotive Applications

    Broader source: Energy.gov [DOE]

    Report on technical assessment of cyro-compressed hydrogen storage tank systems for automotive applications.

  3. Fuel reactivity effects on the efficiency and operational window of dual-fuel compression ignition engines

    SciTech Connect (OSTI)

    Splitter, Derek A; Reitz, Rolf

    2014-01-01

    Fuel reactivity effects on the efficiency and operational window of dual-fuel compression ignition engines

  4. Real-Time SCADA Cyber Protection Using Compression Techniques

    SciTech Connect (OSTI)

    Lyle G. Roybal; Gordon H Rueff

    2013-11-01

    The Department of Energys Office of Electricity Delivery and Energy Reliability (DOE-OE) has a critical mission to secure the energy infrastructure from cyber attack. Through DOE-OEs Cybersecurity for Energy Delivery Systems (CEDS) program, the Idaho National Laboratory (INL) has developed a method to detect malicious traffic on Supervisory, Control, and Data Acquisition (SCADA) network using a data compression technique. SCADA network traffic is often repetitive with only minor differences between packets. Research performed at the INL showed that SCADA network traffic has traits desirable for using compression analysis to identify abnormal network traffic. An open source implementation of a Lempel-Ziv-Welch (LZW) lossless data compression algorithm was used to compress and analyze surrogate SCADA traffic. Infected SCADA traffic was found to have statistically significant differences in compression when compared against normal SCADA traffic at the packet level. The initial analyses and results are clearly able to identify malicious network traffic from normal traffic at the packet level with a very high confidence level across multiple ports and traffic streams. Statistical differentiation between infected and normal traffic level was possible using a modified data compression technique at the 99% probability level for all data analyzed. However, the conditions tested were rather limited in scope and need to be expanded into more realistic simulations of hacking events using techniques and approaches that are better representative of a real-world attack on a SCADA system. Nonetheless, the use of compression techniques to identify malicious traffic on SCADA networks in real time appears to have significant merit for infrastructure protection.

  5. Integrated Dynamic Electron Solutions, Inc. | Department of Energy

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

    Integrated Dynamic Electron Solutions, Inc. America's Next Top Energy Innovator Challenge 333 likes Integrated Dynamic Electron Solutions, Inc. Lawrence Livermore National Laboratory Dynamic Transmission Electron Microscopes DTEM reveal unprecedented details of the mechanisms underlying a host of nanoscale systems that are at the core of our current and future energy economy. A vast and growing number of materials utilized in the energy sector rely on nanostructured materials and their unique

  6. System using data compression and hashing adapted for use for multimedia encryption

    DOE Patents [OSTI]

    Coffland, Douglas R.

    2011-07-12

    A system and method is disclosed for multimedia encryption. Within the system of the present invention, a data compression module receives and compresses a media signal into a compressed data stream. A data acquisition module receives and selects a set of data from the compressed data stream. And, a hashing module receives and hashes the set of data into a keyword. The method of the present invention includes the steps of compressing a media signal into a compressed data stream; selecting a set of data from the compressed data stream; and hashing the set of data into a keyword.

  7. Effect of compression on individual pressure vessel nickel/hydrogen components

    SciTech Connect (OSTI)

    Manzo, M.A.; Perez-Davis, M.E.

    1988-08-01

    Compression tests were performed on representative Individual Pressure Vessel (IPV) Nickel/Hydrogen cell components in an effort to better understand the effects of force on component compression and the interactions of components under compression. It appears that the separator is the most easily compressed of all of the stack components. It will typically partially compress before any of the other components begin to compress. The compression characteristics of the cell components in assembly differed considerably from what would be predicted based on individual compression characteristics. Component interactions played a significant role in the stack response to compression. The results of the compression tests were factored into the design and selection of Belleville washers added to the cell stack to accommodate nickel electrode expansion while keeping the pressure on the stack within a reasonable range of the original preset.

  8. Assess public and private sector capacity to support initiatives...

    Open Energy Info (EERE)

    public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other economic and resource data as needed for LEDS development...

  9. Voluntary agreements in the industrial sector in China

    SciTech Connect (OSTI)

    Price, Lynn; Worrell, Ernst; Sinton, Jonathan

    2003-03-31

    China faces a significant challenge in the years ahead to continue to provide essential materials and products for a rapidly-growing economy while addressing pressing environmental concerns. China's industrial sector is heavily dependent on the country's abundant, yet polluting, coal resources. While tremendous energy conservation and environmental protection achievements were realized in the industrial sector in the past, there remains a great gulf between the China's level of energy efficiency and that of the advanced countries of the world. Internationally, significant energy efficiency improvement in the industrial sector has been realized in a number of countries using an innovative policy mechanism called Voluntary Agreements. This paper describes international experience with Voluntary Agreements in the industrial sector as well as the development of a pilot program to test the use of such agreements with two steel mills in Shandong Province, China.

  10. Dams and Energy Sectors Interdependency Study, September 2011

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) and the U.S. Department of Homeland Security (DHS) collaborated to examine the interdependencies between two critical infrastructure sectors – Dams and Energy....

  11. Commercial Buildings Sector Agent-Based Model | Open Energy Informatio...

    Open Energy Info (EERE)

    OpenEI Keyword(s): EERE tool, Commercial Buildings Sector Agent-Based Model Language: English References: Building Efficiency: Development of an Agent-based Model of the US...

  12. Combined Heat & Power Technology Overview and Federal Sector Deployment

    Office of Energy Efficiency and Renewable Energy (EERE)

    Presentation covers the Combined Heat & Power Technology Overview and Federal Sector Deployment from Oakridge National Laboratory. The presentation is from the FUPWG Spring Meeting, held on May 22, 2013 in San Francisco, California.

  13. DOE Technology Commercialization Fund Kicks Off New Private Sector Outreach

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy’s (DOE’s) Technology Commercialization Fund (TCF) is underway in its inaugural year of operation.  This week, the DOE kicked off a new round of private sector outreach...

  14. City of San Jose- Private Sector Green Building Policy

    Broader source: Energy.gov [DOE]

    In October 2008, the City of San Jose enacted the Private Sector Green Building Policy (Policy No. 6-32). The policy was adopted in Ordinance No. 28622 in June, 2009. All new buildings must meet...

  15. Roadmap to Secure Control Systems in the Energy Sector 2006 ...

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

    Roadmap to Secure Control Systems in the Energy Sector 2006 - Presentation to the 2008 ieRoadmap Workshop Presentation by Hank Kenchington on the 2006 roadmap to secure control ...

  16. "Table 7b. Natural Gas Price, Electric Power Sector, Actual...

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

    b. Natural Gas Price, Electric Power Sector, Actual vs. Projected" "Projected Price in Nominal Dollars" " (nominal dollars per million Btu)" ,1993,1994,1995,1996,1997,1998,1999,200...

  17. LED Site Lighting in the Commercial Building Sector: Opportunities,

    Energy Savers [EERE]

    Challenges, and the CBEA Performance Specification | Department of Energy Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification This March 26, 2009 webcast presented information about the Commercial Building Energy Alliances' (CBEA) efforts to explore the viability of LED site lighting in commercial parking lots.

  18. Vice President Biden Announces New Private Sector Backing for Five

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

    Pioneering Energy Companies | Department of Energy New Private Sector Backing for Five Pioneering Energy Companies Vice President Biden Announces New Private Sector Backing for Five Pioneering Energy Companies August 30, 2011 - 6:12pm Addthis WASHINGTON, D.C. - Speaking at the National Clean Energy Summit 4.0 today in Las Vegas, Nevada, Vice President Joe Biden announced another promising milestone for the Department of Energy's Advanced Research Projects Agency-Energy (ARPA-E): five

  19. Energy-Sector Stakeholders Attend the Department of Energy's 2010

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

    Cybersecurity for Energy Delivery Systems Peer Review | Department of Energy Energy-Sector Stakeholders Attend the Department of Energy's 2010 Cybersecurity for Energy Delivery Systems Peer Review Energy-Sector Stakeholders Attend the Department of Energy's 2010 Cybersecurity for Energy Delivery Systems Peer Review The Department of Energy conducted a Peer Review of its Cybersecurity for Energy Delivery Systems (CEDS) Research and Development Program on July 20-22, 2010 during which 28

  20. Advancing Private Sector Investment in Clean Energy | Department of Energy

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

    Advancing Private Sector Investment in Clean Energy Advancing Private Sector Investment in Clean Energy April 14, 2016 - 3:36pm Addthis The past year has seen several major announcements in public and private clean energy investment, including the launch of Mission Innovation and the Breakthrough Energy Coalition at COP 21 in Paris. | Energy Department photo by Matt Dozier. The past year has seen several major announcements in public and private clean energy investment, including the launch of

  1. Solar Photovoltaic Financing: Residential Sector Deployment | Department of

    Energy Savers [EERE]

    Energy Photovoltaic Financing: Residential Sector Deployment Solar Photovoltaic Financing: Residential Sector Deployment This report presents the information that homeowners and policy makers need to facilitate PV financing at the residential level. The full range of cash payments, bill savings, and tax incentives is covered, as well as potentially available solar attribute payments. Traditional financing is also compared to innovative solutions, many of which are borrowed from the

  2. A Comparison of Cross-Sector Cyber Security Standards

    SciTech Connect (OSTI)

    Robert P. Evans

    2005-09-01

    This report presents a review and comparison (commonality and differences) of three cross-sector cyber security standards and an internationally recognized information technology standard. The comparison identifies the security areas covered by each standard and reveals where the standards differ in emphasis. By identifying differences in the standards, the user can evaluate which standard best meets their needs. For this report, only cross-sector standards were reviewed.

  3. SSL Demonstration: Area Lighting, Yuma Sector Border Patrol Area, AZ

    SciTech Connect (OSTI)

    2015-05-28

    Along the Yuma Sector Border Patrol Area in Yuma, Arizona, the GATEWAY program conducted a trial demonstration in which the incumbent quartz metal halide area lighting was replaced with LED at three pole locations at the Yuma Sector Border Patrol Area in Yuma, Arizona. The retrofit was documented to better understand LED technology performance in high-temperature environments. This document is a summary brief of the Phase 1.0 and 1.1 reports previously published on this demonstration.

  4. Department of Energy Releases New Report on Energy Sector Vulnerablities |

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

    Department of Energy Energy Sector Vulnerablities Department of Energy Releases New Report on Energy Sector Vulnerablities July 11, 2013 - 7:00am Addthis News Media Contact (202) 586-4940 WASHINGTON - The U.S. Department of Energy released a new report which assesses how America's critical energy and electricity infrastructure is vulnerable to the impacts of climate change. Historically high temperatures in recent years have been accompanied by droughts and extreme heat waves, more wildfires

  5. Slideshow: Innovation in the Manufacturing Sector | Department of Energy

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

    Slideshow: Innovation in the Manufacturing Sector Slideshow: Innovation in the Manufacturing Sector December 12, 2013 - 5:00pm Addthis AEMC Summit 1 of 12 AEMC Summit In partnership with the Council on Competitiveness, the Energy Department hosted the first American Energy and Manufacturing Competitiveness (AEMC) Summit in Washington, DC. A culmination of a series of dialogues held across the country over the past year, the summit focused on how we can increase U.S. competitiveness in clean

  6. International Energy Outlook 2016-Buildings sector energy consumption -

    Gasoline and Diesel Fuel Update (EIA)

    Energy Information Administration 6. Buildings sector energy consumption Overview Energy consumed in the buildings sector consists of residential and commercial end users and accounts for 20.1% of the total delivered energy consumed worldwide. Consumption of delivered, or site, energy contrasts with the use of the primary energy that also includes the energy used to generate and deliver electricity to individual sites such as homes, offices, or industrial plants. In the International Energy

  7. International Energy Outlook 2016-Transportation sector energy consumption

    Gasoline and Diesel Fuel Update (EIA)

    - Energy Information Administration 8. Transportation sector energy consumption Overview In the International Energy Outlook 2016 (IEO2016) Reference case, transportation sector delivered energy consumption increases at an annual average rate of 1.4%, from 104 quadrillion British thermal units (Btu) in 2012 to 155 quadrillion Btu in 2040. Transportation energy demand growth occurs almost entirely in regions outside of the Organization for Economic Cooperation and Development (non-OECD), with

  8. Distributed Generation System Characteristics and Costs in the Buildings Sector

    Gasoline and Diesel Fuel Update (EIA)

    Distributed Generation System Characteristics and Costs in the Buildings Sector August 2013 Independent Statistics & Analysis www.eia.gov U.S. Department of Energy Washington, DC 20585 U.S. Energy Information Administration | Distributed Generation System Characteristics and Costs in the Buildings Sector i This report was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA's data, analyses, and

  9. Word aligned bitmap compression method, data structure, and apparatus

    DOE Patents [OSTI]

    Wu, Kesheng; Shoshani, Arie; Otoo, Ekow

    2004-12-14

    The Word-Aligned Hybrid (WAH) bitmap compression method and data structure is a relatively efficient method for searching and performing logical, counting, and pattern location operations upon large datasets. The technique is comprised of a data structure and methods that are optimized for computational efficiency by using the WAH compression method, which typically takes advantage of the target computing system's native word length. WAH is particularly apropos to infrequently varying databases, including those found in the on-line analytical processing (OLAP) industry, due to the increased computational efficiency of the WAH compressed bitmap index. Some commercial database products already include some version of a bitmap index, which could possibly be replaced by the WAH bitmap compression techniques for potentially increased operation speed, as well as increased efficiencies in constructing compressed bitmaps. Combined together, this technique may be particularly useful for real-time business intelligence. Additional WAH applications may include scientific modeling, such as climate and combustion simulations, to minimize search time for analysis and subsequent data visualization.

  10. Energy recovery during expansion of compressed gas using power plant low-quality heat sources

    DOE Patents [OSTI]

    Ochs, Thomas L.; O'Connor, William K.

    2006-03-07

    A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engines and heating the gas, vapor, compressed liquid, or supercritical fluid entering at least one of the expansion engines with a low quality heat source. Expansion engines such as turbines and multiple expansions with heating are disclosed.

  11. Energy Sector-Specific Plan: An Annex to the National Infrastructure

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

    Protection Plan | Department of Energy Sector-Specific Plan: An Annex to the National Infrastructure Protection Plan Energy Sector-Specific Plan: An Annex to the National Infrastructure Protection Plan In its role as the lead Sector-Specific Agency for the Energy Sector, the Department of Energy has worked closely with dozens of government and industry partners to prepare this updated 2010 Energy Sector-Specific Plan (SSP). Much of that work was conducted through the two Energy Sector

  12. Climate Change and the U.S. Energy Sector: Regional Vulnerabilities...

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

    Climate Change and the U.S. Energy Sector: Regional Vulnerabilities and Resilience Solutions Climate Change and the U.S. Energy Sector: Regional Vulnerabilities and Resilience ...

  13. China-NAMA Programme for the Construction Sector in Asia | Open...

    Open Energy Info (EERE)

    NAMA Programme for the Construction Sector in Asia Jump to: navigation, search Name China-NAMA Programme for the Construction Sector in Asia AgencyCompany Organization United...

  14. A Strategy to Engage the Private Sector in Climate Change Adaptation...

    Open Energy Info (EERE)

    to Engage the Private Sector in Climate Change Adaptation in Bangladesh Jump to: navigation, search Name A Strategy to Engage the Private Sector in Climate Change Adaptation in...

  15. Metal hydride hydrogen compression: Recent advances and future prospects

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

    Bowman, Jr., Robert C.; Yartys, Volodymyr A.; Lototskyy, Mykhaylo V.; Linkov, Vladimir; Grant, David; Stuart, Alastair; Eriksen, Jon; Denys, Roman

    2016-03-17

    Metal hydride (MH) thermal sorption compression is one of the more important applications of the metal hydrides. The present paper reviews recent advances in the field based on the analysis of the fundamental principles of this technology. The performances when boosting hydrogen pressure, along with two- and three-step compression units are analyzed. The paper includes also a theoretical modeling of a two-stage compressor aimed at both describing the performance of the experimentally studied systems, but, also, on their optimization and design of more advanced MH compressors. Business developments in the field are reviewed for the Norwegian company HYSTORSYS AS andmore » the South African Institute for Advanced Materials Chemistry. Finally, future prospects are outlined presenting the role of the metal hydride compression in the overall development of the hydrogen driven energy systems. Lastly, the work is based on the analysis of the development of the technology in Europe, USA and South Africa.« less

  16. Gas turbine power plant with supersonic shock compression ramps

    DOE Patents [OSTI]

    Lawlor, Shawn P.; Novaresi, Mark A.; Cornelius, Charles C.

    2008-10-14

    A gas turbine engine. The engine is based on the use of a gas turbine 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. 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 gasdynamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by use of a lean pre-mix system, a pre-swirl compressor, and a bypass stream to bleed a portion of the gas after passing through the pre-swirl compressor to the combustion gas outlet. Use of a stationary low NOx combustor provides excellent emissions results.

  17. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

    1997-04-29

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs. 33 figs.

  18. The FBI compression standard for digitized fingerprint images

    SciTech Connect (OSTI)

    Brislawn, C.M.; Bradley, J.N.; Onyshczak, R.J.; Hopper, T.

    1996-10-01

    The FBI has formulated national standards for digitization and compression of gray-scale fingerprint images. The compression algorithm for the digitized images is based on adaptive uniform scalar quantization of a discrete wavelet transform subband decomposition, a technique referred to as the wavelet/scalar quantization method. The algorithm produces archival-quality images at compression ratios of around 15 to 1 and will allow the current database of paper fingerprint cards to be replaced by digital imagery. A compliance testing program is also being implemented to ensure high standards of image quality and interchangeability of data between different implementations. We will review the current status of the FBI standard, including the compliance testing process and the details of the first-generation encoder.

  19. Fixed-rate compressed floating-point arrays

    Energy Science and Technology Software Center (OSTI)

    2014-03-30

    ZFP is a library for lossy compression of single- and double-precision floating-point data. One of the unique features of ZFP is its support for fixed-rate compression, which enables random read and write access at the granularity of small blocks of values. Using a C++ interface, this allows declaring compressed arrays (1D, 2D, and 3D arrays are supported) that through operator overloading can be treated just like conventional, uncompressed arrays, but which allow the user tomore » specify the exact number of bits to allocate to the array. ZFP also has variable-rate fixed-precision and fixed-accuracy modes, which allow the user to specify a tolerance on the relative or absolute error.« less

  20. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, J.W.; Wecharatana, M.; Jaturapitakkul, C.; Cerkanowicz, A.E.

    1998-12-29

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specification required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs. 33 figs.

  1. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, John W.; Wecharatana, Methi; Jaturapitakkul, Chai; Cerkanowicz, deceased, Anthony E.

    1997-01-01

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specifications required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

  2. Compressive strength of concrete and mortar containing fly ash

    DOE Patents [OSTI]

    Liskowitz, John W.; Wecharatana, Methi; Jaturapitakkul, Chai; Cerkanowicz, deceased, Anthony E.

    1998-01-01

    The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planning a project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strength than hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula is provided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concrete and mortar containing about 15% to 25% fly ash as a replacement for cement, which are capable of meeting design specification required for building and highway construction, are provided. Such materials can thus significantly reduce construction costs.

  3. Limitations on area compression of beams from pierce guns

    SciTech Connect (OSTI)

    Yakovlev, V.P.; Nezhevenko, O.A. [Omega-P Inc., 202008 Yale Station, New Haven, Connecticut 06520-2008 (United States)

    1999-05-01

    An important limitation for rf sources such as klystrons and magnicons, designed for 10{close_quote}s of MW power outputs at cm-wavelengths, is the transverse electron beam size. Cathode current density limits require high beam area compressions to obtain small transverse beam areas for fixed currents. This paper discusses the limitations to high beam area compression, namely geometrical aberrations and thermal spread in transverse velocities. Compensation can oftentimes be introduced for aberrations, but thermal velocity spread presents a fundamental limitation. Examples where subtle compensation strategies were employed are discussed for three guns with 100 MW beam power, and area compressions greater than 2000:1. Two of these guns have already been built. A clear determination of effective cathode temperature has yet to be found experimentally, but possible means to measure it are discussed. {copyright} {ital 1999 American Institute of Physics.}

  4. Detailed Characterization of Particulates Emitted by Pre-Commercial Single-Cylinder Gasoline Compression Ignition Engine

    SciTech Connect (OSTI)

    Zelenyuk, Alla; Reitz, Paul; Stewart, Mark L.; Imre, D.; Loeper, Paul; Adams, Cory; Andrie, Michael; Rothamer, David; Foster, David E.; Narayanaswamy, Kushal; Najt, Paul M.; Solomon, Arun S.

    2014-08-01

    Gasoline Compression Ignition (GCI) engines have the potential to achieve high fuel efficiency and to significantly reduce both NOx and particulate matter (PM) emissions by operating under dilute partially-premixed conditions. This low temperature combustion strategy is dependent upon direct-injection of gasoline during the compression stroke and potentially near top dead center (TDC). The timing and duration of the in-cylinder injections can be tailored based on speed and load to create optimized conditions that result in a stable combustion. We present the results of advanced aerosol analysis methods that have been used for detailed real-time characterization of PM emitted from a single-cylinder GCI engine operated at different speed, load, timing, and number and duration of near-TDC fuel injections. PM characterization included 28 measurements of size and composition of individual particles sampled directly from the exhaust and after mass and/or mobility classification. We use these data to calculate particle effective density, fractal dimension, dynamic shape factors in free-molecular and transition flow regimes, average diameter of primary spherules, number of spherules, and void fraction of soot agglomerates.

  5. A Simple and Efficient Diffuse Interface Method for Compressible Two-Phase Flows

    SciTech Connect (OSTI)

    Ray A. Berry; Richard Saurel; Fabien Petitpas

    2009-05-01

    In nuclear reactor safety and optimization there are key issues that rely on in-depth understanding of basic two-phase flow phenomena with heat and mass transfer. For many reasons, to be discussed, there is growing interest in the application of two-phase flow models to provide diffuse, but nevertheless resolved, simulation of interfaces between two immiscible compressible fluids diffuse interface method (DIM). Because of its ability to dynamically create interfaces and to solve interfaces separating pure media and mixtures for DNS-like (Direct Numerical Simulation) simulations of interfacial flows, we examine the construction of a simple, robust, fast, and accurate numerical formulation for the 5-equation Kapila et al. [1] reduced two-phase model. Though apparently simple, the Kapila et al. model contains a volume fraction differential transport equation containing a nonlinear, non-conservative term which poses serious computational challenges. To circumvent the difficulties encountered with the single velocity and single pressure Kapila et al. [1] multiphase flow model, a 6-equation relaxation hyperbolic model is built to solve interface problems with compressible fluids. In this approach, pressure non-equilibrium is first restored, followed by a relaxation to an asymptotic solution which is convergent to the solutions of the Kapila et al. reduced model. The apparent complexity introduced with this extended hyperbolic model actually leads to considerable simplifications regarding numerical resolution, and the various ingredients used by this method are general enough to consider future extensions to problems involving complex physics.

  6. Assessment of costs and benefits of flexible and alternative fuel use in the US transportation sector

    SciTech Connect (OSTI)

    Not Available

    1991-10-01

    The DOE is conducting a comprehensive technical analysis of a flexible-fuel transportation system in the United States -- that is, a system that could easily switch between petroleum and another fuel, depending on price and availability. The DOE Alternative Fuels Assessment is aimed directly at questions of energy security and fuel availability, but covers a wide range of issues. This report examines environmental, health, and safety concerns associated with a switch to alternative- and flexible-fuel vehicles. Three potential alternatives to oil-based fuels in the transportation sector are considered: methanol, compressed natural gas (CNG), and electricity. The objective is to describe and discuss qualitatively potential environmental, health, and safety issues that would accompany widespread use of these three fuels. This report presents the results of exhaustive literature reviews; discussions with specialists in the vehicular and fuel-production industries and with Federal, State, and local officials; and recent information from in-use fleet tests. Each chapter deals with the end-use and process emissions of air pollutants, presenting an overview of the potential air pollution contribution of the fuel --relative to that of gasoline and diesel fuel -- in various applications. Carbon monoxide, particulate matter, ozone precursors, and carbon dioxide are emphasized. 67 refs., 6 figs. , 8 tabs.

  7. Isentropic compressive wave generator and method of making same

    DOE Patents [OSTI]

    Barker, L.M.

    An isentropic compressive wave generator and method of making same are disclosed. The wave generator comprises a disk or flat pillow member having component materials of different shock impedances formed in a configuration resulting in a smooth shock impedance gradient over the thickness thereof for interpositioning between an impactor member and a target specimen for producing a shock wave of a smooth predictable rise time. The method of making the pillow member comprises the reduction of the component materials to a powder form and forming the pillow member by sedimentation and compressive techniques.

  8. Investing in Our Energy Future: The Story of General Compression |

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

    Department of Energy Our Energy Future: The Story of General Compression Investing in Our Energy Future: The Story of General Compression February 29, 2012 - 9:23am Addthis April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What does government funding mean to a small clean energy startup? In the case of many ARPA-E awardees and small businesses across the country, it means being able to secure the private capital necessary to bring their innovations to

  9. Flavor Physics in the Quark Sector

    SciTech Connect (OSTI)

    Antonelli, Mario; Asner, David Mark; Bauer, Daniel Adams; Becher, Thomas G.; Beneke, M.; Bevan, Adrian John; Blanke, Monika; Bloise, C.; Bona, Marcella; Bondar, Alexander E.; Bozzi, Concezio; Brod, Joachim; Buras, Andrzej J.; Cabibbo, N.; Carbone, A.; Cavoto, Gianluca; Cirigliano, Vincenzo; Ciuchini, Marco; Coleman, Jonathon P.; Cronin-Hennessy, Daniel P.; Dalseno, J.P.; /KEK, Tsukuba /Glasgow U. /Queen Mary, U. of London /Freiburg U. /Charles U. /Pisa U. /Vienna, OAW /Imperial Coll., London /Bergen U. /INFN, Rome /Rome U. /Munich, Tech. U. /INFN, Rome /Rome U. /Southampton U. /INFN, Rome /Nara Women's U. /Florida U. /INFN, Turin /Turin U. /Edinburgh U. /Warwick U. /INFN, Rome /Rome U. /Massachusetts U., Amherst /KEK, Tsukuba /Bern U. /CERN /Munich, Tech. U. /Mainz U., Inst. Phys. /Wayne State U. /Munich, Max Planck Inst. /CERN /Frascati /Brookhaven /Mainz U., Inst. Kernphys. /Munich, Tech. U. /Siegen U. /Imperial Coll., London /Victoria U. /KEK, Tsukuba /Fermilab /Washington U., St. Louis /Frascati /Warwick U. /Indian Inst. Tech., Madras /Melbourne U. /Princeton U. /Beijing, Inst. High Energy Phys. /INFN, Rome /INFN, Rome3 /Fermilab /SLAC /York U., Canada /Brookhaven /UC, Irvine /INFN, Rome /Rome U. /Valencia U., IFIC /INFN, Padua /Padua U. /Munich, Max Planck Inst. /Barcelona U. /Warwick U. /Tata Inst. /Frascati /Mainz U., Inst. Phys. /Vienna U. /KEK, Tsukuba /Orsay, LPT /Frascati /Munich, Tech. U. /Brookhaven /Bern U. /CERN /Mainz U., Inst. Phys. /Wayne State U. /Valencia U., IFIC /CERN /Kentucky U. /Oxford U. /Iowa State U. /Bristol U. /INFN, Rome /Rutherford /CERN /Orsay, LAL /Glasgow U. /INFN, Padua /Queen Mary, U. of London /Texas U. /LPHE, Lausanne /Fermilab /UC, Santa Cruz /Vienna, OAW /Cincinnati U. /Frascati /Orsay, LAL /Ohio State U. /Purdue U. /Novosibirsk, IYF /Frascati /INFN, Rome /Padua U. /INFN, Rome /Bern U. /Karlsruhe U. /Brookhaven /CERN /Paris U., VI-VII /Zurich, ETH /Pisa U. /Frascati /Oxford U. /Orsay, LAL /INFN, Rome2 /INFN, Rome /INFN, Rome3 /Princeton U. /Fermilab /Queen's U., Kingston /KEK, Tsukuba /Melbourne U. /Brookhaven /Indiana U. /INFN, Rome /Rome U. /Pisa U. /Mainz U., Inst. Phys. /Karlsruhe U. /Oxford U. /Cambridge U., DAMTP /Edinburgh U. /CERN

    2010-08-26

    In the past decade, one of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor. In this time frame, measurements and the theoretical interpretation of their results have advanced tremendously. A much broader understanding of flavor particles has been achieved, apart from their masses and quantum numbers, there now exist detailed measurements of the characteristics of their interactions allowing stringent tests of Standard Model predictions. Among the most interesting phenomena of flavor physics is the violation of the CP symmetry that has been subtle and difficult to explore. In the past, observations of CP violation were confined to neutral K mesons, but since the early 1990s, a large number of CP-violating processes have been studied in detail in neutral B mesons. In parallel, measurements of the couplings of the heavy quarks and the dynamics for their decays in large samples of K,D, and B mesons have been greatly improved in accuracy and the results are being used as probes in the search for deviations from the Standard Model. In the near future, there will be a transition from the current to a new generation of experiments, thus a review of the status of quark flavor physics is timely. This report is the result of the work of the physicists attending the 5th CKM workshop, hosted by the University of Rome 'La Sapienza', September 9-13, 2008. It summarizes the results of the current generation of experiments that is about to be completed and it confronts these results with the theoretical understanding of the field which has greatly improved in the past decade.

  10. Laser or charged-particle-beam fusion reactor with direct electric generation by magnetic flux compression

    DOE Patents [OSTI]

    Lasche, G.P.

    1983-09-29

    The invention is a laser or particle-beam-driven fusion reactor system which takes maximum advantage of both the very short pulsed nature of the energy release of inertial confinement fusion (ICF) and the very small volumes within which the thermonuclear burn takes place. The pulsed nature of ICF permits dynamic direct energy conversion schemes such as magnetohydrodynamic (MHD) generation and magnetic flux compression; the small volumes permit very compact blanket geometries. By fully exploiting these characteristics of ICF, it is possible to design a fusion reactor with exceptionally high power density, high net electric efficiency, and low neutron-induced radioactivity. The invention includes a compact blanket design and method and apparatus for obtaining energy utilizing the compact blanket.

  11. Sound velocity of tantalum under shock compression in the 18–142 GPa range

    SciTech Connect (OSTI)

    Xi, Feng Jin, Ke; Cai, Lingcang Geng, Huayun; Tan, Ye; Li, Jun

    2015-05-14

    Dynamic compression experiments of tantalum (Ta) within a shock pressure range from 18–142 GPa were conducted driven by explosive, a two-stage light gas gun, and a powder gun, respectively. The time-resolved Ta/LiF (lithium fluoride) interface velocity profiles were recorded with a displacement interferometer system for any reflector. Sound velocities of Ta were obtained from the peak state time duration measurements with the step-sample technique and the direct-reverse impact technique. The uncertainty of measured sound velocities were analyzed carefully, which suggests that the symmetrical impact method with step-samples is more accurate for sound velocity measurement, and the most important parameter in this type experiment is the accurate sample/window particle velocity profile, especially the accurate peak state time duration. From these carefully analyzed sound velocity data, no evidence of a phase transition was found up to the shock melting pressure of Ta.

  12. STATUS OF THE NEUTRALIZED DRIFT COMPRESSION EXPERIMENT (NDCX-II)

    SciTech Connect (OSTI)

    Waldron, W.L.; Kwan, J.W.

    2011-04-21

    The Neutralized Drift Compression Experiment (NDCX-II) is an 11 M$ induction accelerator project currently in construction at Lawrence Berkeley National Laboratory for warm dense matter (WDM) experiments investigating the interaction of ion beams with matter at elevated temperature and pressure. The machine consists of a lithium injector, induction accelerator cells, diagnostic cells, a neutralized drift compression line, a final focus solenoid, and a target chamber. The induction cells and some of the pulsed power systems have been reused from the decommissioned Advanced Test Accelerator at Lawrence Livermore National Laboratory after refurbishment and modification. The machine relies on a sequence of acceleration waveforms to longitudinally compress the initial ion pulse from 600 ns to less than 1 ns in {approx} 12 m. Radial confinement of the beam is achieved with 2.5 T pulsed solenoids. In the initial hardware configuration, 50 nC of Li{sup +} will be accelerated to 1.25 MeV and allowed to drift-compress to a peak current of {approx}40 A. The project started in the summer of 2009. Construction of the accelerator will be completed in the fall of 2011 and will provide a worldwide unique opportunity for ion-driven warm dense matter experiments as well as research related to novel beam manipulations for heavy ion fusion drivers.

  13. Thermophysical properties of multi-shock compressed dense argon

    SciTech Connect (OSTI)

    Chen, Q. F. Zheng, J.; Gu, Y. J.; Chen, Y. L.; Cai, L. C.; Shen, Z. J.

    2014-02-21

    In contrast to the single shock compression state that can be obtained directly via experimental measurements, the multi-shock compression states, however, have to be calculated with the aid of theoretical models. In order to determine experimentally the multiple shock states, a diagnostic approach with the Doppler pins system (DPS) and the pyrometer was used to probe multiple shocks in dense argon plasmas. Plasma was generated by a shock reverberation technique. The shock was produced using the flyer plate impact accelerated up to ∼6.1 km/s by a two-stage light gas gun and introduced into the plenum argon gas sample, which was pre-compressed from the environmental pressure to about 20 MPa. The time-resolved optical radiation histories were determined using a multi-wavelength channel optical transience radiance pyrometer. Simultaneously, the particle velocity profiles of the LiF window was measured with multi-DPS. The states of multi-shock compression argon plasma were determined from the measured shock velocities combining the particle velocity profiles. We performed the experiments on dense argon plasmas to determine the principal Hugonoit up to 21 GPa, the re-shock pressure up to 73 GPa, and the maximum measure pressure of the fourth shock up to 158 GPa. The results are used to validate the existing self-consistent variational theory model in the partial ionization region and create new theoretical models.

  14. Vortex stabilized electron beam compressed fusion grade plasma

    SciTech Connect (OSTI)

    Hershcovitch, Ady

    2014-03-19

    Most inertial confinement fusion schemes are comprised of highly compressed dense plasmas. Those schemes involve short, extremely high power, short pulses of beams (lasers, particles) applied to lower density plasmas or solid pellets. An alternative approach could be to shoot an intense electron beam through very dense, atmospheric pressure, vortex stabilized plasma.

  15. A compute-Efficient Bitmap Compression Index for Database Applications

    Energy Science and Technology Software Center (OSTI)

    2006-01-01

    FastBit: A Compute-Efficient Bitmap Compression Index for Database Applications The Word-Aligned Hybrid (WAH) bitmap compression method and data structure is highly efficient for performing search and retrieval operations on large datasets. The WAH technique is optimized for computational efficiency. The WAH-based bitmap indexing software, called FastBit, is particularly appropriate to infrequently varying databases, including those found in the on-line analytical processing (OLAP) industry. Some commercial database products already include some Version of a bitmap index,more » which could possibly be replaced by the WAR bitmap compression techniques for potentially large operational speedup. Experimental results show performance improvements by an average factor of 10 over bitmap technology used by industry, as well as increased efficiencies in constructing compressed bitmaps. FastBit can be use as a stand-alone index, or integrated into a database system. ien integrated into a database system, this technique may be particularly useful for real-time business analysis applications. Additional FastRit applications may include efficient real-time exploration of scientific models, such as climate and combustion simulations, to minimize search time for analysis and subsequent data visualization. FastBit was proven theoretically to be time-optimal because it provides a search time proportional to the number of elements selected by the index.« less

  16. Spatial compression algorithm for the analysis of very large multivariate images

    DOE Patents [OSTI]

    Keenan, Michael R.

    2008-07-15

    A method for spatially compressing data sets enables the efficient analysis of very large multivariate images. The spatial compression algorithms use a wavelet transformation to map an image into a compressed image containing a smaller number of pixels that retain the original image's information content. Image analysis can then be performed on a compressed data matrix consisting of a reduced number of significant wavelet coefficients. Furthermore, a block algorithm can be used for performing common operations more efficiently. The spatial compression algorithms can be combined with spectral compression algorithms to provide further computational efficiencies.

  17. Chemical Dynamics

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

    ARPA-E Basic Energy Sciences Materials Sciences and Engineering Chemical Sciences ... Twitter Google + Vimeo GovDelivery SlideShare Chemical Dynamics HomeTransportation ...

  18. Development of modifications to the material point method for the simulation of thin membranes, compressible fluids, and their interactions

    SciTech Connect (OSTI)

    York, A.R. II [Sandia National Labs., Albuquerque, NM (United States). Engineering and Process Dept.] [Sandia National Labs., Albuquerque, NM (United States). Engineering and Process Dept.

    1997-07-01

    The material point method (MPM) is an evolution of the particle in cell method where Lagrangian particles or material points are used to discretize the volume of a material. The particles carry properties such as mass, velocity, stress, and strain and move through a Eulerian or spatial mesh. The momentum equation is solved on the Eulerian mesh. Modifications to the material point method are developed that allow the simulation of thin membranes, compressible fluids, and their dynamic interactions. A single layer of material points through the thickness is used to represent a membrane. The constitutive equation for the membrane is applied in the local coordinate system of each material point. Validation problems are presented and numerical convergence is demonstrated. Fluid simulation is achieved by implementing a constitutive equation for a compressible, viscous, Newtonian fluid and by solution of the energy equation. The fluid formulation is validated by simulating a traveling shock wave in a compressible fluid. Interactions of the fluid and membrane are handled naturally with the method. The fluid and membrane communicate through the Eulerian grid on which forces are calculated due to the fluid and membrane stress states. Validation problems include simulating a projectile impacting an inflated airbag. In some impact simulations with the MPM, bodies may tend to stick together when separating. Several algorithms are proposed and tested that allow bodies to separate from each other after impact. In addition, several methods are investigated to determine the local coordinate system of a membrane material point without relying upon connectivity data.

  19. Canted Undulator Upgrade for GeoSoilEnviroCARS Sector 13 at the Advanced Photon Source

    SciTech Connect (OSTI)

    Sutton, Stephen

    2013-02-02

    Support for the beamline component of the canted undulator upgrade of Sector 13 (GeoSoilEnviroCARS; managed and operated by the University of Chicago) at the Advanced Photon Source (APS; Argonne National Laboratory) was received from three agencies (equally divided): NASA-SRLIDAP (now LARS), NSF-EAR-IF (ARRA) and DOE-Single Investigator Small Group (SISGR). The associated accelerator components (undulators, canted front end) were provided by the APS using DOE-ARRA funding. The intellectual merit of the research enabled by the upgrade lies in advancing our knowledge of the composition, structure and properties of earth materials; the processes they control; and the processes that produce them. The upgrade will facilitate scientific advances in the following areas: high pressure mineral physics and chemistry, non-crystalline and nano-crystalline materials at high pressure, chemistry of hydrothermal fluids, reactions at mineral-water interfaces, biogeochemistry, oxidation states of magmas, flow dynamics of fluids and solids, and cosmochemistry. The upgrade, allowing the microprobe to operate 100% of the time and the high pressure and surface scattering and spectroscopy instruments to receive beam time increases, will facilitate much more efficient use of the substantial investment in these instruments. The broad scientific community will benefit by the increase in the number of scientists who conduct cutting-edge research at GSECARS. The user program in stations 13ID-C (interface scattering) and 13ID-D (laser heated diamond anvil cell and large volume press) recommenced in June 2012. The operation of the 13ID-E microprobe station began in the Fall 2012 cycle (Oct.-Dec 2012). The upgraded canted beamlines double the amount of undulator beam time at Sector 13 and provide new capabilities including extended operations of the X-ray microprobe down to the sulfur K edge and enhanced brightness at high energy. The availability of the upgraded beamlines will advance the research being conducted at Sector 13.

  20. Electricity savings potentials in the residential sector of Bahrain

    SciTech Connect (OSTI)

    Akbari, H.; Morsy, M.G.; Al-Baharna, N.S.

    1996-08-01

    Electricity is the major fuel (over 99%) used in the residential, commercial, and industrial sectors in Bahrain. In 1992, the total annual electricity consumption in Bahrain was 3.45 terawatt-hours (TWh), of which 1.95 TWh (56%) was used in the residential sector, 0.89 TWh (26%) in the commercial sector, and 0.59 TWh (17%) in the industrial sector. Agricultural energy consumption was 0.02 TWh (less than 1%) of the total energy use. In Bahrain, most residences are air conditioned with window units. The air-conditioning electricity use is at least 50% of total annual residential use. The contribution of residential AC to the peak power consumption is even more significant, approaching 80% of residential peak power demand. Air-conditioning electricity use in the commercial sector is also significant, about 45% of the annual use and over 60% of peak power demand. This paper presents a cost/benefit analysis of energy-efficient technologies in the residential sector. Technologies studied include: energy-efficient air conditioners, insulating houses, improved infiltration, increasing thermostat settings, efficient refrigerators and freezers, efficient water heaters, efficient clothes washers, and compact fluorescent lights. We conservatively estimate a 32% savings in residential electricity use at an average cost of about 4 fils per kWh. (The subsidized cost of residential electricity is about 12 fils per kWh. 1000 fils = 1 Bahrain Dinar = US$ 2.67). We also discuss major policy options needed for implementation of energy-efficiency technologies.