Sample records for flow adjustments existing

  1. Geothermal Heat Flow and Existing Geothermal Plants | Department...

    Energy Savers [EERE]

    Geothermal Heat Flow and Existing Geothermal Plants Geothermal Heat Flow and Existing Geothermal Plants Geothermal Heat Flow and Existing Plants With plants in development. Click...

  2. Adjustable flow rate controller for polymer solutions

    DOE Patents [OSTI]

    Jackson, Kenneth M. (Bartlesville, OK)

    1981-01-01T23:59:59.000Z

    An adjustable device for controlling the flow rate of polymer solutions which results in only little shearing of the polymer molecules, said device comprising an inlet manifold, an outlet manifold, a plurality of tubes capable of providing communication between said inlet and outlet manifolds, said tubes each having an internal diameter that is smaller than that of the inlet manifold and large enough to insure that viscosity of the polymer solution passing through each said tube will not be reduced more than about 25 percent, and a valve associated with each tube, said valve being capable of opening or closing communication in that tube between the inlet and outlet manifolds, each said valve when fully open having a diameter that is substantially at least as great as that of the tube with which it is associated.

  3. Adjusting flow station job to remote Nigerian location yields savings

    SciTech Connect (OSTI)

    Wooten, R.; Williams, E.C. (OPI International Inc., Houston, TX (United States))

    1994-05-02T23:59:59.000Z

    In September 1991, Chevron Nigeria Ltd. and Nigerian National Petroleum Crop. contracted Offshore Pipelines to design, procure, construct, install, and commission the Opuekeba 30,000 b/d crude-oil flow station on an offshore platform near Olero Creek, Nigeria, approximately 22 miles from the nearest deepwater access. Chevron's original project plan included bringing the flow station to the site in small packages and then assembling it in a lengthy field hook-up process. Offshore Pipelines developed a plan early in the project to maximize construction and hook-up in the fabrication yard, then transport the nearly complete structures to site by way of a newly dredged canal. What proved to be most difficult was the site location in Nigeria. Job planning and communication were important in the successful completion of the project. Keeping the components of the large and complex facility simple proved to be effective and efficient and played a key role in completing the project on time and within budget. The paper discusses overcoming obstacles, lift and depth constraints, dredging, fabrication, installation, and large-time problems.

  4. Flow adjustment and interior flow associated with a rectangular porous obstruction

    E-Print Network [OSTI]

    Rominger, Jeffrey Tsaros

    The flow at the leading edge and in the interior of a rectangular porous obstruction is described through experiments and scaling. The porous obstruction consists of an emergent, rectangular array of cylinders in shallow ...

  5. An existence result for multidimensional immiscible two-phase flows with discontinuous capillary pressure field

    E-Print Network [OSTI]

    ], [EEM06], [CGP09], [BLS09], [Can09c]). While some mathematical analysis in the one-dimensional case has the problem (see [CGP09], [EEM06]). In this paper, we propose to establish an existence result

  6. Composition and Flow Behavior of F-Canyon Tank 804 Sludge following Manganese Addition and pH Adjustment

    SciTech Connect (OSTI)

    Poirier, M. R.; Stallings, M. E.; Burket, P.R.; Fink, S. D.

    2005-11-30T23:59:59.000Z

    The Site Deactivation and Decommissioning (SDD) Organization is evaluating options to disposition the 800 underground tanks (including removal of the sludge heels from these tanks). To support this effort, SDD requested assistance from Savannah River National Laboratory (SRNL) personnel to examine the composition and flow characteristics of the Tank 804 sludge slurry after diluting it 10:1 with water, adding manganese nitrate to produce a slurry containing 5.5 wt % manganese (40:1 ratio of Mn:Pu), and adding sufficient 8 M caustic to raise the pH to 7, 10, and 14. Researchers prepared slurries containing one part Tank 804 sludge and 10 parts water. The water contained 5.5 wt % manganese (which SDD will add to poison the plutonium in Tank 804) and was pH adjusted to 3, 7, 10, or 14. They hand mixed (i.e., shook) these slurries and allowed them to sit overnight. With the pH 3, 7, and 10 slurries, much of the sludge remained stuck to the container wall. With the pH 14 slurry, most of the sludge appeared to be suspended in the slurry. They collected samples from the top and bottom of each container, which were analyzed for plutonium, manganese, and organic constituents. Following sampling, they placed the remaining material into a viscometer and measured the relationship between applied shear stress and shear rate. The pH 14 slurry was placed in a spiral ''race track'' apparatus and allowed to gravity drain.

  7. An existence result for multidimensional immiscible two-phase flows with discontinuous capillary pressure field

    E-Print Network [OSTI]

    of the fluid composition, but also discontinuous pressure fields (see [vDMdN95], [EEN98], [BDPvD03], [EEM06], [EEM06]). In this paper, we propose to establish an existence result for the solution of the system

  8. Managing the Drivers of Air Flow and Water Vapor Transport in Existing Single Family Homes (Revised)

    SciTech Connect (OSTI)

    Cummings, J.; Withers, C.; Martin, E.; Moyer, N.

    2012-10-01T23:59:59.000Z

    This document focuses on managing the driving forces which move air and moisture across the building envelope. While other previously published Measure Guidelines focus on elimination of air pathways, the ultimate goal of this Measure Guideline is to manage drivers which cause air flow and water vapor transport across the building envelope (and also within the home), control air infiltration, keep relative humidity (RH) within acceptable limits, avoid combustion safety problems, improve occupant comfort, and reduce house energy use.

  9. Viscous Flows and Conditions for Existence of Shocks in Relativistic Magnetic Hydrodynamics

    E-Print Network [OSTI]

    V. I. Zhdanov; P. V. Tytarenko; M. S. Borshch

    2004-07-23T23:59:59.000Z

    We present a criterion for a shock wave existence in relativistic magnetic hydrodynamics with an arbitrary (possibly non-convex) equation of state. The criterion has the form of algebraic inequality that involves equation of state of the fluid; it singles out the physical solutions and it can be easily checked for any discontinuity satisfying concervation laws. The method of proof uses introduction of small viscosity into the coupled set of equations of motion of ideal relativistic fluid with infinite conductivity and Maxwell equations.

  10. Geology. Most of the Guadalupe River flows through either Glen Rose Limestone, or Fluviatile Terrace Deposits. Combined geologic categories are designated where two geologic units exist in cross section and the channel flows along a boundary between the t

    E-Print Network [OSTI]

    Curran, Joanna C.

    Results Geology. Most of the Guadalupe River flows through either Glen Rose Limestone, or Fluviatile Terrace Deposits. Combined geologic categories are designated where two geologic units exist length. The highest percentage of bedrock coverage per geologic type appears in combined categories (Fig

  11. Existence of new nonlocal field theory on noncommutative space and spiral flow in renormalization group analysis of matrix models

    E-Print Network [OSTI]

    Kawamoto, Shoichi

    2015-01-01T23:59:59.000Z

    In the previous study, we formulate a matrix model renormalization group based on the fuzzy spherical harmonics with which a notion of high/low energy can be attributed to matrix elements, and show that it exhibits locality and various similarity to the usual Wilsonian renormalization group of quantum field theory. In this work, we continue the renormalization group analysis of a matrix model with emphasis on nonlocal interactions where the fields on antipodal points are coupled. They are indeed generated in the renormalization group procedure and are tightly related to the noncommutative nature of the geometry. We aim at formulating renormalization group equations including such nonlocal interactions and finding existence of nontrivial field theory with antipodal interactions on the fuzzy sphere. We find several nontrivial fixed points and calculate the scaling dimensions associated with them. We also consider the noncommutative plane limit and then no consistent fixed point is found. This contrast between t...

  12. Budget Adjustment Single Sided Budget Adjustment

    E-Print Network [OSTI]

    Stephens, Graeme L.

    Budget Adjustment & Single Sided Budget Adjustment WELCOME! #12;Accessing Kuali · Campus://busfin.colostate.edu #12;What will be covered today? · When should I use a Budget Adjustment (BA) or Single Sided Budget · Error correction · Onesided vs. singlesided entries #12;When to use a Budget Adjustment · How do I know

  13. In this project, we deal with the simulation and the optimisation of flows when uncertainties exist in the models and/or the data. We only consider non intrusive methods so that existing CFD softwares

    E-Print Network [OSTI]

    Abgrall, Rémi

    uncertainties exist in the models and/or the data. We only consider non intrusive methods so that existing CFD. To this aim, we pursue the study of a non intrusive, accurate method, which is also non sensitive for very non linear systems of PDEs, where the solutions are often discontinuous and/or chaotic

  14. Governance of Adjustments

    E-Print Network [OSTI]

    Wernerfelt, Birger

    2003-03-14T23:59:59.000Z

    The article proposes a research program to compare game forms in terms of their ability to govern ex post adjustments to ex ante contracts. The comparisons can be ...

  15. Existence and Uniqueness of Strong Solutions for a Compressible Multiphase Navier-Stokes Miscible Fluid-Flow Problem in Dimension n = 1

    E-Print Network [OSTI]

    C. Michoski; A. Vasseur

    2008-11-13T23:59:59.000Z

    We prove the global existence and uniqueness of strong solutions for a compressible multifluid described by the barotropic Navier-Stokes equations in dim = 1. The result holds when the diffusion coefficient depends on the pressure. It relies on a global control in time of the L2 norm of the space derivative of the density, via a new kind of entropy.

  16. Purchased Gas Adjustment Rules (Tennessee)

    Broader source: Energy.gov [DOE]

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

  17. Automatic temperature adjustment apparatus

    DOE Patents [OSTI]

    Chaplin, James E. (66 Overlook Rd., Bloomingdale, NJ 07403)

    1985-01-01T23:59:59.000Z

    An apparatus for increasing the efficiency of a conventional central space heating system is disclosed. The temperature of a fluid heating medium is adjusted based on a measurement of the external temperature, and a system parameter. The system parameter is periodically modified based on a closed loop process that monitors the operation of the heating system. This closed loop process provides a heating medium temperature value that is very near the optimum for energy efficiency.

  18. Precision adjustable stage

    DOE Patents [OSTI]

    Cutburth, Ronald W. (Tracy, CA); Silva, Leonard L. (Livermore, CA)

    1988-01-01T23:59:59.000Z

    An improved mounting stage of the type used for the detection of laser beams is disclosed. A stage center block is mounted on each of two opposite sides by a pair of spaced ball bearing tracks which provide stability as well as simplicity. The use of the spaced ball bearing pairs in conjunction with an adjustment screw which also provides support eliminates extraneous stabilization components and permits maximization of the area of the center block laser transmission hole.

  19. Adjustable shear stress erosion and transport flume

    DOE Patents [OSTI]

    Roberts, Jesse D. (Carlsbad, NM); Jepsen, Richard A. (Carlsbad, NM)

    2002-01-01T23:59:59.000Z

    A method and apparatus for measuring the total erosion rate and downstream transport of suspended and bedload sediments using an adjustable shear stress erosion and transport (ASSET) flume with a variable-depth sediment core sample. Water is forced past a variable-depth sediment core sample in a closed channel, eroding sediments, and introducing suspended and bedload sediments into the flow stream. The core sample is continuously pushed into the flow stream, while keeping the surface level with the bottom of the channel. Eroded bedload sediments are transported downstream and then gravitationally separated from the flow stream into one or more quiescent traps. The captured bedload sediments (particles and aggregates) are weighed and compared to the total mass of sediment eroded, and also to the concentration of sediments suspended in the flow stream.

  20. Low volume flow meter

    DOE Patents [OSTI]

    Meixler, Lewis D. (East Windsor, NJ)

    1993-01-01T23:59:59.000Z

    The low flow monitor provides a means for determining if a fluid flow meets a minimum threshold level of flow. The low flow monitor operates with a minimum of intrusion by the flow detection device into the flow. The electrical portion of the monitor is externally located with respect to the fluid stream which allows for repairs to the monitor without disrupting the flow. The electronics provide for the adjustment of the threshold level to meet the required conditions. The apparatus can be modified to provide an upper limit to the flow monitor by providing for a parallel electronic circuit which provides for a bracketing of the desired flow rate.

  1. Existing Facilities Program

    Broader source: Energy.gov [DOE]

    The NYSERDA Existing Facilities program merges the former Peak Load Reduction and Enhanced Commercial and Industrial Performance programs. The new program offers a broad array of different...

  2. Adjusted Estimates of Texas Natural Gas Production

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

    1 Energy Information Administration Adjusted Estimates of Texas Natural Gas Production Background The Energy Information Administration (EIA) is adjusting its estimates of natural...

  3. Existing woodland Constructed woodland

    E-Print Network [OSTI]

    and modern campus needs while also considering the overlapping landscape systems of plants, soils, paving master plan are two measures that the University has taken to control the inevitable impact include enhancing existing systems, constructing new local systems, and implementing landscape

  4. Do Black Holes Exist?

    E-Print Network [OSTI]

    J. W. Moffat

    1993-02-22T23:59:59.000Z

    The problem of information loss in black hole formation and the associated violations of basic laws of physics, such as conservation of energy, causality and unitarity, are avoided in the nonsymmetric gravitational theory, if the NGT charge of a black hole and its mass satisfy an inequality that does not violate any known experimental data and allows the existence of white dwarfs and neutron stars.

  5. Can wormholes exist?

    E-Print Network [OSTI]

    V. Khatsymovsky

    1993-10-23T23:59:59.000Z

    Renormalized vacuum expectation values of electromagnetic stress-energy tensor are calculated in the background spherically-symmetrical metric of the wormhole's topology. Covariant geodesic point separation method of regularization is used. Violation of the weak energy condition at the throat of wormhole takes place for geometry sufficiently close to that of infinitely long wormhole of constant radius irrespectively of the detailed form of metric. This is an argument in favour of possibility of existence of selfconsistent wormhole in empty space maintained by vacuum field fluctuations in the wormhole's background.

  6. Optimal transition from coal to gas and renewable power under capacity constraints and adjustment costs

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Optimal transition from coal to gas and renewable power under capacity constraints and adjustment existing coal power plants to gas and renewable power under a carbon budget. It solves a model of polluting, exhaustible resources with capacity constraints and adjustment costs (to build coal, gas, and renewable power

  7. When Lyapunov exponents fail to exist William Ott

    E-Print Network [OSTI]

    Yorke, James

    When Lyapunov exponents fail to exist William Ott Courant Institute of Mathematical Sciences New such that Lyapunov exponents fail to exist at nearly every point in the phase space R2 despite the fact that the flow admits a unique natural measure. This example illustrates that the existence of Lyapunov exponents

  8. Adjustable Speed Drives as Applied to Centrifugal Pumps 

    E-Print Network [OSTI]

    Jarc, D. A.; Robechek, J. D.; Connors, D. P.

    1982-01-01T23:59:59.000Z

    the reduction in flow, the potential exists for significant energy reduction at reduced flows. 572 ESL-IE-82-04-109 Proceedings from the Fourth Industrial Energy Technology Conference, Houston, TX, April 4-7, 1982 13 12 11 10 w 9 :!: 8 i= Cl 7 z... curve, it is possible to achieve the same reduced flow achieved with a valve, but at significantly less pressure. 573 ESL-IE-82-04-109 Proceedings from the Fourth Industrial Energy Technology Conference, Houston, TX, April 4-7, 1982 Flow Control V...

  9. Observing and modeling Earths energy flows

    SciTech Connect (OSTI)

    Stevens B.; Schwartz S.

    2012-05-11T23:59:59.000Z

    This article reviews, from the authors perspective, progress in observing and modeling energy flows in Earth's climate system. Emphasis is placed on the state of understanding of Earth's energy flows and their susceptibility to perturbations, with particular emphasis on the roles of clouds and aerosols. More accurate measurements of the total solar irradiance and the rate of change of ocean enthalpy help constrain individual components of the energy budget at the top of the atmosphere to within {+-}2 W m{sup -2}. The measurements demonstrate that Earth reflects substantially less solar radiation and emits more terrestrial radiation than was believed even a decade ago. Active remote sensing is helping to constrain the surface energy budget, but new estimates of downwelling surface irradiance that benefit from such methods are proving difficult to reconcile with existing precipitation climatologies. Overall, the energy budget at the surface is much more uncertain than at the top of the atmosphere. A decade of high-precision measurements of the energy budget at the top of the atmosphere is providing new opportunities to track Earth's energy flows on timescales ranging from days to years, and at very high spatial resolution. The measurements show that the principal limitation in the estimate of secular trends now lies in the natural variability of the Earth system itself. The forcing-feedback-response framework, which has developed to understand how changes in Earth's energy flows affect surface temperature, is reviewed in light of recent work that shows fast responses (adjustments) of the system are central to the definition of the effective forcing that results from a change in atmospheric composition. In many cases, the adjustment, rather than the characterization of the compositional perturbation (associated, for instance, with changing greenhouse gas concentrations, or aerosol burdens), limits accurate determination of the radiative forcing. Changes in clouds contribute importantly to this adjustment and thus contribute both to uncertainty in estimates of radiative forcing and to uncertainty in the response. Models are indispensable to calculation of the adjustment of the system to a compositional change but are known to be flawed in their representation of clouds. Advances in tracking Earth's energy flows and compositional changes on daily through decadal timescales are shown to provide both a critical and constructive framework for advancing model development and evaluation.

  10. Robust Risk Adjustment in Health Insurance

    E-Print Network [OSTI]

    2014-08-07T23:59:59.000Z

    Aug 7, 2014 ... Moody's estimates the preliminary median operating margins for ..... [1] Staff, ORYX risk adjustment guide, Tech. rep., Joint Commission (2014).

  11. Efficient Adjustable Reflectivity Smart Window

    SciTech Connect (OSTI)

    D. Morgan Tench

    2005-12-01T23:59:59.000Z

    This project addressed the key technical issues for development of an efficient smart window based on reversible electrochemical transfer of silver between a mirror electrode and a localized counter electrode. Effort to provide uniform switching over large areas focused on use of a resistive transparent electrode innerlayer to increase the interelectrode resistance. An effective edge seal was developed in collaboration with adhesive suppliers and an electrochromic device manufacturer. Work to provide a manufacturable counter electrode focused on fabricating a dot matrix electrode without photolithography by electrodeposition of Pt nuclei on inherent active sites on a transparent oxide conductor. An alternative counter electrode based on a conducting polymer and an ionic liquid electrolyte was also investigated. Work in all of these areas was successful. Sputtered large-bandgap oxide innerlayers sandwiched between conductive indium tin oxide (ITO) layers were shown to provide sufficient cross-layer resistance (>300 ohm/cm{sup 2}) without significantly affecting the electrochemical properties of the ITO overlayer. Two edge seal epoxies, one procured from an epoxy manufacturer and one provided by an electrochromic device manufacturer in finished seals, were shown to be effective barriers against oxygen intrusion up to 80 C. The optimum density of nuclei for the dot matrix counter electrode was attained without use of photolithography by electrodeposition from a commercial alkaline platinum plating bath. Silver loss issues for cells with dot matrix electrodes were successfully addressed by purifying the electrolyte and adjusting the cell cycling parameters. More than 30K cycles were demonstrated for a REM cell (30-cm square) with a dot matrix counter electrode. Larger cells (30-cm square) were successfully fabricated but could not be cycled since the nucleation layers (provided by an outside supplier) were defective so that mirror deposits could not be produced.

  12. Engine control system having fuel-based adjustment

    DOE Patents [OSTI]

    Willi, Martin L. (Dunlap, IL); Fiveland, Scott B. (Metamora, IL); Montgomery, David T. (Edelstein, IL); Gong, Weidong (Dunlap, IL)

    2011-03-15T23:59:59.000Z

    A control system for an engine having a cylinder is disclosed having an engine valve configured to affect a fluid flow of the cylinder, an actuator configured to move the engine valve, and an in-cylinder sensor configured to generate a signal indicative of a characteristic of fuel entering the cylinder. The control system also has a controller in communication with the actuator and the sensor. The controller is configured to determine the characteristic of the fuel based on the signal and selectively regulate the actuator to adjust a timing of the engine valve based on the characteristic of the fuel.

  13. Portable wastewater flow meter

    DOE Patents [OSTI]

    Hunter, Robert M. (320 S. Wilson Ave., Bozeman, MT 59715)

    1990-01-01T23:59:59.000Z

    A portable wastewater flow meter particularly adapted for temporary use at a single location in measuring the rate of liquid flow in a circular entrance conduit of a sewer manhole both under free flow and submerged, open channel conditions and under full pipe, surcharged conditions, comprising an apparatus having a cylindrical external surface and an inner surface that constricts the flow through the apparatus in such a manner that a relationship exists between (1) the difference between the static pressure head of liquid flowing through the entrance of the apparatus and the static pressure head of liquid flowing through the constriction, and (2) the rate of liquid flow through the apparatus.

  14. Portable wastewater flow meter

    DOE Patents [OSTI]

    Hunter, Robert M. (320 S. Wilson Ave., Bozeman, MT 59715)

    1999-02-02T23:59:59.000Z

    A portable wastewater flow meter particularly adapted for temporary use at a single location in measuring the rate of liquid flow in a circular entrance conduit of a sewer manhole both under free flow and submerged, open channel conditions and under fill pipe, surcharged conditions, comprising an apparatus having a cylindrical external surface and an inner surface that constricts the flow through the apparatus in such a manner that a relationship exists between (1) the difference between the static pressure head of liquid flowing through the entrance of the apparatus and the static pressure head of liquid flowing through the constriction, and (2) the rate of liquid flow through the apparatus.

  15. Cooling Flows or Heating Flows?

    E-Print Network [OSTI]

    James Binney

    2003-10-08T23:59:59.000Z

    It is now clear that AGN heat cooling flows, largely by driving winds. The winds may contain a relativistic component that generates powerful synchrotron radiation, but it is not clear that all winds do so. The spatial and temporal stability of the AGN/cooling flow interaction are discussed. Collimation of the winds probably provides spatial stability. Temporal stability may be possible only for black holes with masses above a critical value. Both the failure of cooling flows to have adiabatic cores and the existence of X-ray cavities confirm the importance of collimated outflows. I quantify the scale of the convective flow that the AGN Hydra would need to drive if it balanced radiative inward flow by outward flow parallel to the jets. At least in Virgo any such flow must be confined to r<~20 kpc. Hydrodynamical simulations suggest that AGN outbursts cannot last longer than ~25 Myr. Data for four clusters with well studied X-ray cavities suggests that heating associated with cavity formation approximately balances radiative cooling. The role of cosmic infall and the mechanism of filament formation are briefly touched on.

  16. Mapping Geothermal Heat Flow and Existing Plants | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122Commercial602 1,39732onMake Your Next Road Trip Fuel EfficientManhattan

  17. Mapping Geothermal Heat Flow and Existing Plants | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOil & Gas »ofMarketingSmartManufacturing Innovationof Energy

  18. Magnetic bearing element with adjustable stiffness

    DOE Patents [OSTI]

    Post, Richard F

    2013-11-12T23:59:59.000Z

    A compact magnetic bearing element is provided which is made of permanent magnet discs configured to be capable of the adjustment of the bearing stiffness and levitation force over a wide range.

  19. Risk-adjusted monitoring of survival times

    SciTech Connect (OSTI)

    Sego, Landon H.; Reynolds, Marion R.; Woodall, William H.

    2009-02-26T23:59:59.000Z

    We consider the monitoring of clinical outcomes, where each patient has a di®erent risk of death prior to undergoing a health care procedure.We propose a risk-adjusted survival time CUSUM chart (RAST CUSUM) for monitoring clinical outcomes where the primary endpoint is a continuous, time-to-event variable that may be right censored. Risk adjustment is accomplished using accelerated failure time regression models. We compare the average run length performance of the RAST CUSUM chart to the risk-adjusted Bernoulli CUSUM chart, using data from cardiac surgeries to motivate the details of the comparison. The comparisons show that the RAST CUSUM chart is more efficient at detecting a sudden decrease in the odds of death than the risk-adjusted Bernoulli CUSUM chart, especially when the fraction of censored observations is not too high. We also discuss the implementation of a prospective monitoring scheme using the RAST CUSUM chart.

  20. Using Electronic Adjustable Speed Drives for Efficiency Improvement and Cost Reduction

    E-Print Network [OSTI]

    Friedman, N. R.

    U.S. industry and utilities have been using ac adjustable speed drives (ASDs) for more than 50 years. ASDs utilize power electronics technology to control the flow of power to an ac motor, thereby controlling the motor’s speed and rate of energy...

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

    Broader source: Energy.gov [DOE]

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

  2. ON THE EXISTENCE OF SHOCKS IN IRRADIATED EXOPLANETARY ATMOSPHERES

    SciTech Connect (OSTI)

    Heng, Kevin [Institute for Astronomy, ETH Zuerich, Wolfgang-Pauli-Strasse 27, CH-8093 Zuerich (Switzerland)

    2012-12-10T23:59:59.000Z

    Supersonic flows are expected to exist in the atmospheres of irradiated exoplanets, but the question of whether shocks develop lingers. Specifically, it reduces to whether continuous flow in a closed loop may become supersonic and if some portions of the supersonic flow steepen into shocks. We first demonstrate that continuous, supersonic flow may exist in two flavors: isentropic and non-isentropic, with shocks being included in the latter class of solutions. Supersonic flow is a necessary but insufficient condition for shocks to develop. The development of a shock requires the characteristics of neighboring points in a flow to intersect. We demonstrate that the intersection of characteristics may be quantified via the knowledge of the Mach number. Finally, we examine three-dimensional simulations of hot Jovian atmospheres and demonstrate that shock formation is expected to occur mostly on the dayside hemisphere, upstream of the substellar point, because the enhanced temperatures near the substellar point provide a natural pressure barrier for the returning flow. Understanding the role of shocks in irradiated exoplanetary atmospheres is relevant to correctly modeling observables such as the peak offsets of infrared phase curves.

  3. Z .Global and Planetary Change 20 1999 93123 Global sea level rise and glacial isostatic adjustment

    E-Print Network [OSTI]

    Peltier, W. Richard

    adjustment W.R. Peltier ) Department of Physics, UniÕersity of Toronto, 60 St. George Street, Toronto-mail: peltier@atmosp.physics.utoronto.ca Z .rather recently Peltier and Tushingham, 1989 , it was not clearly;( )W.R. PeltierrGlobal and Planetary Change 20 1999 93­12394 Z .existed at that time e.g., Peltier

  4. The Greenhouse Effect Does Exist!

    E-Print Network [OSTI]

    Ebel, Jochen

    2009-01-01T23:59:59.000Z

    In particular, without the greenhouse effect, essential features of the atmospheric temperature profile as a function of height cannot be described, i.e., the existence of the tropopause above which we see an almost isothermal temperature curve, whereas beneath it the temperature curve is nearly adiabatic. The relationship between the greenhouse effect and observed temperature curve is explained and the paper by Gerlich and Tscheuschner [arXiv:0707.1161] critically analyzed. Gerlich and Tscheuschner called for this discussion in their paper.

  5. Article mounting and position adjustment stage

    DOE Patents [OSTI]

    Cutburth, Ronald W. (Tracy, CA); Silva, Leonard L. (Livermore, CA)

    1988-01-01T23:59:59.000Z

    An improved adjustment and mounting stage of the type used for the detection of laser beams is disclosed. A ring sensor holder has locating pins on a first side thereof which are positioned within a linear keyway in a surrounding housing for permitting reciprocal movement of the ring along the keyway. A rotatable ring gear is positioned within the housing on the other side of the ring from the linear keyway and includes an oval keyway which drives the ring along the linear keyway upon rotation of the gear. Motor-driven single-stage and dual (x, y) stage adjustment systems are disclosed which are of compact construction and include a large laser transmission hole.

  6. Article mounting and position adjustment stage

    DOE Patents [OSTI]

    Cutburth, R.W.; Silva, L.L.

    1988-05-10T23:59:59.000Z

    An improved adjustment and mounting stage of the type used for the detection of laser beams is disclosed. A ring sensor holder has locating pins on a first side thereof which are positioned within a linear keyway in a surrounding housing for permitting reciprocal movement of the ring along the keyway. A rotatable ring gear is positioned within the housing on the other side of the ring from the linear keyway and includes an oval keyway which drives the ring along the linear keyway upon rotation of the gear. Motor-driven single-stage and dual (x, y) stage adjustment systems are disclosed which are of compact construction and include a large laser transmission hole. 6 figs.

  7. Remote control for anode-cathode adjustment

    DOE Patents [OSTI]

    Roose, Lars D. (Albuquerque, NM)

    1991-01-01T23:59:59.000Z

    An apparatus for remotely adjusting the anode-cathode gap in a pulse power machine has an electric motor located within a hollow cathode inside the vacuum chamber of the pulse power machine. Input information for controlling the motor for adjusting the anode-cathode gap is fed into the apparatus using optical waveguides. The motor, controlled by the input information, drives a worm gear that moves a cathode tip. When the motor drives in one rotational direction, the cathode is moved toward the anode and the size of the anode-cathode gap is diminished. When the motor drives in the other direction, the cathode is moved away from the anode and the size of the anode-cathode gap is increased. The motor is powered by batteries housed in the hollow cathode. The batteries may be rechargeable, and they may be recharged by a photovoltaic cell in combination with an optical waveguide that receives recharging energy from outside the hollow cathode. Alternatively, the anode-cathode gap can be remotely adjusted by a manually-turned handle connected to mechanical linkage which is connected to a jack assembly. The jack assembly converts rotational motion of the handle and mechanical linkage to linear motion of the cathode moving toward or away from the anode.

  8. Building America Expert Meeting: Transforming Existing Buildings...

    Energy Savers [EERE]

    Transforming Existing Buildings through New Media--An Idea Exchange Building America Expert Meeting: Transforming Existing Buildings through New Media--An Idea Exchange This report...

  9. GLOBAL OPTIMIZATION OF MULTIPHASE FLOW NETWORKS IN OIL AND GAS PRODUCTION SYSTEMS

    E-Print Network [OSTI]

    Johansen, Tor Arne

    1 GLOBAL OPTIMIZATION OF MULTIPHASE FLOW NETWORKS IN OIL AND GAS PRODUCTION SYSTEMS MSc. Hans in an oil production system is developed. Each well may be manipulated by injecting lift gas and adjusting in the maximum oil flow rate, water flow rate, liquid flow rate, and gas flow rate. The wells may also

  10. Method and apparatus for controlling fluid flow

    DOE Patents [OSTI]

    Miller, J.R.

    1980-06-27T23:59:59.000Z

    A method and apparatus for precisely controlling the rate (and hence amount) of fluid flow are given. The controlled flow rate is finely adjustable, can be extremely small (on the order of microliter-atmospheres per second), can be adjusted to zero (flow stopped), and is stable to better than 1% with time. The dead volume of the valve can be made arbitrarily small, in fact essentially zero. The valve employs no wearing mechanical parts (including springs, stems, or seals). The valve is finely adjustable, has a flow rate dynamic range of many decades, can be made compatible with any fluid, and is suitable for incorporation into an open or closed loop servo-control system.

  11. Wage adjustment, competitiveness and unemployment East Germany after unification

    E-Print Network [OSTI]

    Pfeifer, Holger

    Wage adjustment, competitiveness and unemployment ­ East Germany after unification Werner Smolny years after unification large differences of the labor market situation in East and West Germany persist adjustment in East Germany and the resulting development of competitiveness and unemployment differentials

  12. Adjustable expandable cryogenic piston and ring

    DOE Patents [OSTI]

    Mazur, Peter O. (Aurora, IL); Pallaver, Carl B. (Woodridge, IL)

    1980-01-01T23:59:59.000Z

    The operation of a reciprocating expansion engine for cryogenic refrigeration is improved by changing the pistons and rings so that the piston can be operated from outside the engine to vary the groove in which the piston ring is located. This causes the ring, which is of a flexible material, to be squeezed so that its contact with the wall is subject to external control. This control may be made manually or it may be made automatically in response to instruments that sense the amount of blow-by of the cryogenic fluid and adjust for an optimum blow-by.

  13. Elliptically polarizing adjustable phase insertion device

    DOE Patents [OSTI]

    Carr, Roger (Redwood City, CA)

    1995-01-01T23:59:59.000Z

    An insertion device for extracting polarized electromagnetic energy from a beam of particles is disclosed. The insertion device includes four linear arrays of magnets which are aligned with the particle beam. The magnetic field strength to which the particles are subjected is adjusted by altering the relative alignment of the arrays in a direction parallel to that of the particle beam. Both the energy and polarization of the extracted energy may be varied by moving the relevant arrays parallel to the beam direction. The present invention requires a substantially simpler and more economical superstructure than insertion devices in which the magnetic field strength is altered by changing the gap between arrays of magnets.

  14. adjusted clinical groups: Topics by E-print Network

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

    status, psychiatric symptomatology, various family variables, psychosocial adjustment and knowledge of illness, medication, stress management and problem-solving skills......

  15. adjusted clinical group: Topics by E-print Network

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

    status, psychiatric symptomatology, various family variables, psychosocial adjustment and knowledge of illness, medication, stress management and problem-solving skills......

  16. Self-adjusting magnetic bearing systems

    DOE Patents [OSTI]

    Post, R.F.

    1998-07-21T23:59:59.000Z

    A self-adjusting magnetic bearing automatically adjusts the parameters of an axially unstable magnetic bearing such that its force balance is maintained near the point of metastable equilibrium. Complete stabilization can be obtained with the application of weak restoring forces either from a mechanical bearing (running at near-zero load, thus with reduced wear) or from the action of residual eddy currents in a snubber bearing. In one embodiment, a torque is generated by the approach of a slotted pole to a conducting plate. The torque actuates an assembly which varies the position of a magnetic shunt to change the force exerted by the bearing. Another embodiment achieves axial stabilization by sensing vertical displacements in a suspended bearing element, and using this information in an electrical servo system. In a third embodiment, as a rotating eddy current exciter approaches a stationary bearing, it heats a thermostat which actuates an assembly to weaken the attractive force between the two bearing elements. An improved version of an electromechanical battery utilizing the designs of the various embodiments is described. 7 figs.

  17. Self-adjusting magnetic bearing systems

    DOE Patents [OSTI]

    Post, Richard F. (Walnut Creek, CA)

    1998-01-01T23:59:59.000Z

    A self-adjusting magnetic bearing automatically adjusts the parameters of an axially unstable magnetic bearing such that its force balance is maintained near the point of metastable equilibrium. Complete stabilization can be obtained with the application of weak restoring forces either from a mechanical bearing (running at near-zero load, thus with reduced wear) or from the action of residual eddy currents in a snubber bearing. In one embodiment, a torque is generated by the approach of a slotted pole to a conducting plate. The torque actuates an assembly which varies the position of a magnetic shunt to change the force exerted by the bearing. Another embodiment achieves axial stabilization by sensing vertical displacements in a suspended bearing element, and using this information in an electrical servo system. In a third embodiment, as a rotating eddy current exciter approaches a stationary bearing, it heats a thermostat which actuates an assembly to weaken the attractive force between the two bearing elements. An improved version of an electromechanical battery utilizing the designs of the various embodiments is described.

  18. Adjusting the IP $\\beta$ Functions in RHIC

    E-Print Network [OSTI]

    Wittmer, W; Pilat, F; Ptitsyn, V; Van Zeijts, J

    2004-01-01T23:59:59.000Z

    The beta functions at the IP can be adjusted without perturbation of other optics functions via several approaches. In this paper we describe a scheme based on a vector knob, which assigns fixed values to the different tuning quadrupoles and scales them by a common multiplier. The values for the knob vector were calculated for a lattice without any errors using MADX. Previous studies for the LHC [1] have shown that this approach can meet the design goals. A specific feature of the RHIC lattice is the nested power supply system. To cope with the resulting problems a detailed response matrix analysis has been carried out and different sets of knobs were calculated and compared. The knobs were tested at RHIC during the 2004 run and preliminary results are discussed. Simultaneously a new approach to measure the beam sizes of both colliding beams at the IP, based on the tunability provided by the knobs, was developed and tested.

  19. Scheme for rapid adjustment of network impedance

    DOE Patents [OSTI]

    Vithayathil, John J. (3814 NE. 136th Pl., Portland, OR 97230)

    1991-01-01T23:59:59.000Z

    A static controlled reactance device is inserted in series with an AC electric power transmission line to adjust its transfer impedance. An inductor (reactor) is serially connected with two back-to-back connected thyristors which control the conduction period and hence the effective reactance of the inductor. Additional reactive elements are provided in parallel with the thyristor controlled reactor to filter harmonics and to obtain required range of variable reactance. Alternatively, the static controlled reactance device discussed above may be connected to the secondary winding of a series transformer having its primary winding connected in series to the transmission line. In a three phase transmission system, the controlled reactance device may be connected in delta configuration on the secondary side of the series transformer to eliminate triplen harmonics.

  20. Permanent-magnet multipole with adjustable strength

    DOE Patents [OSTI]

    Halbach, K.

    1982-09-20T23:59:59.000Z

    Two or more magnetically soft pole pieces are symmetrically positioned along a longitudinal axis to provide a magnetic field within a space defined by the pole pieces. Two or more permanent magnets are mounted to an external magnetically-soft cylindrical sleeve which rotates to bring the permanent magnets into closer coupling with the pole pieces and thereby adjustably control the field strength of the magnetic field produced in the space defined by the pole pieces. The permanent magnets are preferably formed of rare earth cobalt (REC) material which has a high remanent magnetic field and a strong coercive force. The pole pieces and the permanent magnets have corresponding cylindrical surfaces which are positionable with respect to each other to vary the coupling there between. Auxiliary permanent magnets are provided between the pole pieces to provide additional magnetic flux to the magnetic field without saturating the pole pieces.

  1. Permanent magnet multipole with adjustable strength

    DOE Patents [OSTI]

    Halbach, Klaus (Berkeley, CA)

    1985-01-01T23:59:59.000Z

    Two or more magnetically soft pole pieces are symmetrically positioned along a longitudinal axis to provide a magnetic field within a space defined by the pole pieces. Two or more permanent magnets are mounted to an external magnetically-soft cylindrical sleeve which rotates to bring the permanent magnets into closer coupling with the pole pieces and thereby adjustably control the field strength of the magnetic field produced in the space defined by the pole pieces. The permanent magnets are preferably formed of rare earth cobalt (REC) material which has a high remanent magnetic field and a strong coercive force. The pole pieces and the permanent magnets have corresponding cylindrical surfaces which are positionable with respect to each other to vary the coupling therebetween. Auxiliary permanent magnets are provided between the pole pieces to provide additional magnetic flux to the magnetic field without saturating the pole pieces.

  2. Elliptically polarizing adjustable phase insertion device

    DOE Patents [OSTI]

    Carr, R.

    1995-01-17T23:59:59.000Z

    An insertion device for extracting polarized electromagnetic energy from a beam of particles is disclosed. The insertion device includes four linear arrays of magnets which are aligned with the particle beam. The magnetic field strength to which the particles are subjected is adjusted by altering the relative alignment of the arrays in a direction parallel to that of the particle beam. Both the energy and polarization of the extracted energy may be varied by moving the relevant arrays parallel to the beam direction. The present invention requires a substantially simpler and more economical superstructure than insertion devices in which the magnetic field strength is altered by changing the gap between arrays of magnets. 3 figures.

  3. Remote adjustable focus Raman spectroscopy probe

    DOE Patents [OSTI]

    Schmucker, John E. (Hurt, VA); Blasi, Raymond J. (Harrison City, PA); Archer, William B. (Bethel Park, PA)

    1999-01-01T23:59:59.000Z

    A remote adjustable focus Raman spectroscopy probe allows for analyzing Raman scattered light from a point of interest external probe. An environmental barrier including at least one window separates the probe from the point of interest. An optical tube is disposed adjacent to the environmental barrier and includes a long working length compound lens objective next to the window. A beam splitter and a mirror are at the other end. A mechanical means is used to translated the prove body in the X, Y, and Z directions resulting in a variable focus optical apparatus. Laser light is reflected by the beam splitter and directed toward the compound lens objective, then through the window and focused on the point of interest. Raman scattered light is then collected by the compound lens objective and directed through the beam splitter to a mirror. A device for analyzing the light, such as a monochrometer, is coupled to the mirror.

  4. Driven cavity flow: from molecular dynamics to continuum hydrodynamics

    E-Print Network [OSTI]

    Tiezheng Qian; Xiao-Ping Wang

    2004-03-06T23:59:59.000Z

    Molecular dynamics (MD) simulations have been carried out to investigate the slip of fluid in the lid driven cavity flow where the no-slip boundary condition causes unphysical stress divergence. The MD results not only show the existence of fluid slip but also verify the validity of the Navier slip boundary condition. To better understand the fluid slip in this problem, a continuum hydrodynamic model has been formulated based upon the MD verification of the Navier boundary condition and the Newtonian stress. Our model has no adjustable parameter because all the material parameters (density, viscosity, and slip length) are directly determined from MD simulations. Steady-state velocity fields from continuum calculations are in quantitative agreement with those from MD simulations, from the molecular-scale structure to the global flow. The main discovery is as follows. In the immediate vicinity of the corners where moving and fixed solid surfaces intersect, there is a core partial-slip region where the slippage is large at the moving solid surface and decays away from the intersection quickly. In particular, the structure of this core region is nearly independent of the system size. On the other hand, for sufficiently large system, an additional partial-slip region appears where the slippage varies as $1/r$ with $r$ denoting the distance from the corner along the moving solid surface. The existence of this wide power-law region is in accordance with the asymptotic $1/r$ variation of stress and the Navier boundary condition.

  5. Trade Adjustment Assistance Community College and Career Training...

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

    View a list of all current Trade Adjustment Assistance Community College and Career Training (TAACCCT) grant program awards containing Energy andor Manufacturing topics. This...

  6. adjustable speed ac: Topics by E-print Network

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

    of Input Voltage Sag and Unbalance on DC Link Inductor and Capacitor Stress in Adjustable Speed Drives Renewable Energy Websites Summary: 's transition into single-phase operation,...

  7. ac adjustable speed: Topics by E-print Network

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

    of Input Voltage Sag and Unbalance on DC Link Inductor and Capacitor Stress in Adjustable Speed Drives Renewable Energy Websites Summary: 's transition into single-phase operation,...

  8. Adjustment Data Report for Fiscal Years Prior to 2008 | Department...

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

    covers the adjustment data report for fiscal years prior to 2008. energydatareport.xls More Documents & Publications Reporting Guidance for Federal Agency Annual Report on Energy...

  9. ,"New York Dry Natural Gas Reserves Adjustments (Billion Cubic...

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

    Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","New York Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

  10. Optimization Online - Robust risk adjustment in health insurance

    E-Print Network [OSTI]

    Tengjiao Xiao

    2014-08-08T23:59:59.000Z

    Aug 8, 2014 ... Abstract: Risk adjustment is used to calibrate payments to health plans based on the relative health status of insured populations and helps ...

  11. Reciprocal Recognition of Existing Personnel Security Clearances

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2006-07-20T23:59:59.000Z

    Provides direction for implementing actions required by the Office of Management and Budget memorandum, Reciprocal Recognition of Existing Personnel Security Clearances.

  12. Overview of Existing Wind Energy Ordinances

    Broader source: Energy.gov [DOE]

    The purpose of this report is to educate and engage state and local governments, as well as policymakers, about existing large wind energy ordinances.

  13. Best Practices in Existing Building Commissioning

    Broader source: Energy.gov [DOE]

    Presentation covers the Best Practices in Existing Building Commissioning and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Rapid City, South Dakota.

  14. Existing Building Commissioning (EBCx) Project Considerations

    Broader source: Energy.gov [DOE]

    Presentation covers the existing building commissioning (EBCx) project considerations, and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Rapid City, South Dakota.

  15. Business Energy Efficiency Rebate for Existing Buildings

    Broader source: Energy.gov [DOE]

    Energy Trust of Oregon offers incentives for commercial, agricultural and institutional customers of any of the state's investor owned utilities to increase the energy efficiency of their existing...

  16. Building Energy Simulation Test for Existing Homes (BESTEST-EX) Methodology: Preprint

    SciTech Connect (OSTI)

    Judkoff, R.; Polly, B.; Bianchi, M.; Neymark, J.

    2011-11-01T23:59:59.000Z

    The test suite represents a set of cases applying the new Building Energy Simulation Test for Existing Homes (BESTEST-EX) Methodology developed by NREL. (Judkoff et al. 2010a). The NREL team developed the test cases in consultation with the home retrofit industry (BESTEST-EX Working Group 2009), and adjusted the test specifications in accordance with information supplied by a participant with access to large utility bill datasets (Blasnik 2009).

  17. 4 Inventory of Existing Activities Introduction

    E-Print Network [OSTI]

    289 4 Inventory of Existing Activities Introduction Inventory of existing activities is a key activities, which represents each agencies role in the management of the subbasin. In addition, an inventory of projects follows. This inventory is designed to be compared with the needs for fish and wildlife identified

  18. Summary of Concrete Overlays Existing concrete pavement

    E-Print Network [OSTI]

    Summary of Concrete Overlays Existing concrete pavement with surface distresses Prepared surface Monolithic pavement with new concrete surface Existing asphalt pavement with surface distresses Milled pavement with asphalt surface distresses Milled and cleaned surface New 2­5 in. (5.1­12.7 cm) bonded

  19. CSEM WP 120 Asymmetric Price Adjustment and Consumer Search

    E-Print Network [OSTI]

    California at Berkeley. University of

    CSEM WP 120 Asymmetric Price Adjustment and Consumer Search: An Examination of the Retail Gasoline of Economics November 13, 2003 Abstract It has been documented that retail gasoline prices respond more quickly theoretical model of asymmetric adjustment that empiri- cally matches observed retail gasoline price behavior

  20. Upgrade LCDs or TVs with improved ergonomic adjustability

    E-Print Network [OSTI]

    Saskatchewan, University of

    Highlights · Upgrade LCDs or TVs with improved ergonomic adjustability · Constant Force (CFTM) patented lift-and-pivot motion technology produces smooth adjustment · Neo-Flex LCD Stand is the only range of movement to your LCD display or TV with the Neo-Flex LCD Stand! This proven technology is now

  1. Risk adjusted control charts for health care Willem Albers

    E-Print Network [OSTI]

    Al Hanbali, Ahmad

    )) strongly suggest to apply SPC methods, in particular control charts, and we shall follow that line hereRisk adjusted control charts for health care monitoring Willem Albers Department of Applied membership can be used to adjust the basic negative binomial charts to the actual risk incurred. Attention

  2. Would Border Carbon Adjustments prevent carbon leakage and heavy industry

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    No 52-2013 Would Border Carbon Adjustments prevent carbon leakage and heavy industry halshs-00870689,version1-7Oct2013 #12;Would Border Carbon Adjustments prevent carbon leakage and heavy The efficiency of unilateral climate policies may be hampered by carbon leakage and competitiveness losses

  3. Adjustable, rapidly switching microfluidic gradient generation using focused travelling surface acoustic waves

    SciTech Connect (OSTI)

    Destgeer, Ghulam; Im, Sunghyuk; Hang Ha, Byung; Ho Jung, Jin; Ahmad Ansari, Mubashshir; Jin Sung, Hyung, E-mail: hjsung@kaist.ac.kr [Department of Mechanical Engineering, KAIST, 291 Daejak-ro, Yuseong-gu, Daejeon 305-701 (Korea, Republic of)

    2014-01-13T23:59:59.000Z

    We demonstrate a simple device to generate chemical concentration gradients in a microfluidic channel using focused travelling surface acoustic waves (F-TSAW). A pair of curved interdigitated metal electrodes deposited on the surface of a piezoelectric (LiNbO{sub 3}) substrate disseminate high frequency sound waves when actuated by an alternating current source. The F-TSAW produces chaotic acoustic streaming flow upon its interaction with the fluid inside a microfluidic channel, which mixes confluent streams of chemicals in a controlled fashion for an adjustable and rapidly switching gradient generation.

  4. BEopt-CA (Ex): A Tool for Optimal Integration of EE, DR and PV in Existing California Homes

    SciTech Connect (OSTI)

    Christensen, C.; Horowitz, S.; Maguire, J.; Tabares-Velasco, P.; Springer, D.; Coates, P.; Bell, C.; Price, S.; Sreedharan, P.; Pickrell, K.

    2014-04-01T23:59:59.000Z

    Opportunities for combining energy efficiency, demand response, and energy storage with PV are often missed, because the required knowledge and expertise for these different technologies exist in separate organizations or individuals. Furthermore, there is a lack of quantitative tools to optimize energy efficiency, demand response and energy storage with PV, especially for existing buildings. As technology costs evolve (e.g., the ongoing reduction in the cost of PV), design strategies need to be adjusted accordingly based on quantitative analysis.

  5. Greening existing buildings with LEED-EB!

    E-Print Network [OSTI]

    Dirksen, Tyson H

    2008-01-01T23:59:59.000Z

    The market of existing office buildings is going green. While early adopters of green buildings were owner-occupiers, there is a current wave of nonowner-occupied office buildings seeking Leadership in Energy and Environmental ...

  6. Capitalize on Existing Assets with Demand Response

    E-Print Network [OSTI]

    Collins, J.

    2008-01-01T23:59:59.000Z

    Industrial facilities universally struggle with escalating energy costs. EnerNOC will demonstrate how commercial, industrial, and institutional end-users can capitalize on their existing assets—at no cost and no risk. Demand response, the voluntary...

  7. Improvements to Existing Jefferson Lab Wire Scanners

    SciTech Connect (OSTI)

    McCaughan, Michael D. [JLAB; Tiefenback, Michael G. [JLAB; Turner, Dennis L. [JLAB

    2013-06-01T23:59:59.000Z

    This poster will detail the augmentation of selected existing CEBAF wire scanners with commercially available hardware, PMTs, and self created software in order to improve the scanners both in function and utility.

  8. EWEB – Existing Facilities Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Eugene Water and Electric Board (EWEB) offers an extensive list of energy efficiency rebates for existing facilities that apply to both specific equipment, as well as customized rebates for more...

  9. Commissioning Existing Buildings: A Program Perspective

    E-Print Network [OSTI]

    Jump, D.; Rosillo, A.; Tahir, A.

    2003-01-01T23:59:59.000Z

    Since September 2002, the Oakland Energy Partnership's Large Commercial Building Tune-Up Program has recruited managers and operators of existing large commercial buildings in the City of Oakland for program participation. The Tune-Up Program...

  10. Energy Management Strategies for Existing Buildings 

    E-Print Network [OSTI]

    Gilmer, L.

    2009-01-01T23:59:59.000Z

    Energy Management Strategies for Existing Buildings Energy efficiency in the built environment: in the United States, we have over 5 million existing buildings. These buildings consume a large percentage of our resources, one of which is energy.... In the coming years, as our demands increase, our infrastructure ages, and we set goals to reduce our green house gas emissions, building energy use plays a vital role. Our success in reducing our carbon footprint lies in our ability to determine energy use...

  11. adjusted correlation analysis: Topics by E-print Network

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

    the quickest convergence to maxmin-fair states. Whereas Chiu-Jain model rests on a well modeling, it is still common to use Chiu-Jain model for comparison of binary adjust-...

  12. An asset-pricing view of external adjustment

    E-Print Network [OSTI]

    Pavlova, Anna

    Recent literature has argued that conventional measures of external sustainability – the trade balance and current account – are misleading because they omit capital gains on net foreign asset positions. We adjust the ...

  13. ADJUSTMENT COEFFICIENT FOR RISK PROCESSES IN SOME DEPENDENT CONTEXTS

    E-Print Network [OSTI]

    Maume-Deschamps, Véronique

    ADJUSTMENT COEFFICIENT FOR RISK PROCESSES IN SOME DEPENDENT CONTEXTS H. COSSETTE, E. MARCEAU, AND V, ruin theory, non para- metric estimation, weak dependence. . 1 #12;2 H. COSSETTE, E. MARCEAU, AND V

  14. ADJUSTMENT COEFFICIENT FOR RISK PROCESSES IN SOME DEPENDENT CONTEXTS

    E-Print Network [OSTI]

    Boyer, Edmond

    ADJUSTMENT COEFFICIENT FOR RISK PROCESSES IN SOME DEPENDENT CONTEXTS H. COSSETTE, E. MARCEAU, AND V" DOI : 10.1007/s11009-010-9182-y #12;2 H. COSSETTE, E. MARCEAU, AND V. MAUME-DESCHAMPS with UTu = u

  15. A Study of Adjustable Speed Drive Applications for Pumps

    E-Print Network [OSTI]

    Triezenberg, D. M.; Lakhavani, S. T.

    1983-01-01T23:59:59.000Z

    A STUDY OF ADJUSTABLE SPEED DRIVE APPLICATIONS FOR PUMPS D. M. Triezenberg and S. T. Lakhavani Westinghouse R&D Center Pittsburgh, Pennsylvania ABSTRACT We have undertaken a survey and analysis of potential ASD applications for pumps in U...

  16. Support assembly having three dimension position adjustment capabilities

    DOE Patents [OSTI]

    Cutburth, R.W.; House, F.A.

    1985-11-08T23:59:59.000Z

    An assembly for supporting an apparatus such as a microscope or laser to and against a planer surface is disclosed herein. This apparatus includes three specific arrangements for adjusting the positions of three segments of the apparatus so as to adjust the position of the overall apparatus with respect to the planer surface in the x-, y- and z-directions, where the x-direction and the y-direction are both parallel with the planer surface and perpendicular to one another and where the z-direction is perpendicular to the planer surface and the x- and y-directions. Each of two of the three arrangements includes its own means for providing x-, y- and z-adjustments (which includes rotation in the x, y plane) while it is only necessary for the third arrangement to provide adjustments in the z-direction.

  17. Pressure-flow reducer for aerosol focusing devices

    DOE Patents [OSTI]

    Gard, Eric (San Francisco, CA); Riot, Vincent (Oakland, CA); Coffee, Keith (Diablo Grande, CA); Woods, Bruce (Livermore, CA); Tobias, Herbert (Kensington, CA); Birch, Jim (Albany, CA); Weisgraber, Todd (Brentwood, CA)

    2008-04-22T23:59:59.000Z

    A pressure-flow reducer, and an aerosol focusing system incorporating such a pressure-flow reducer, for performing high-flow, atmosphere-pressure sampling while delivering a tightly focused particle beam in vacuum via an aerodynamic focusing lens stack. The pressure-flow reducer has an inlet nozzle for adjusting the sampling flow rate, a pressure-flow reduction region with a skimmer and pumping ports for reducing the pressure and flow to enable interfacing with low pressure, low flow aerosol focusing devices, and a relaxation chamber for slowing or stopping aerosol particles. In this manner, the pressure-flow reducer decouples pressure from flow, and enables aerosol sampling at atmospheric pressure and at rates greater than 1 liter per minute.

  18. Method for preparing membranes with adjustable separation performance

    DOE Patents [OSTI]

    Peterson, E.S.; Orme, C.J.; Stone, M.L.

    1995-01-31T23:59:59.000Z

    Methods for adjustable separation of solutes and solvents involve the combination of the use of a maximally swollen membrane and subsequent vacuum depressurization exerted on the permeate side of that membrane. By adjusting the extent of depressurization it is possible to separate solvent from solutes and solutes from each other. Improved control of separation parameters as well as improved flux rates characterize the present invention. 2 figs.

  19. Benefits of Commisioning New & Existing Buildings

    E-Print Network [OSTI]

    Meline, K.

    2011-01-01T23:59:59.000Z

    of * Data from Whole Building Design Guide ? a program of National Institute of Building Sciences (06-21-2010) 5 $4.00 $1.00 WHY ARE OWNERS USING THE CX PROCESS? Data obtained from ?Costs and Benefits of Commissioning New and Existing Commercial... Buildings? ? June 21, 2005. LBNL, PECI, TAMU-ESL Data obtained from ?Costs and Benefits of Commissioning New and Existing Commercial Buildings? ? June 21, 2005. LBNL, PECI, TAMU-ESL WHAT HAPPENS WHEN NEW BUILDINGS AREN?T PROPERLY COMMISSIONED...

  20. Yakima Subbasin Plan Inventory of Existing Activities

    E-Print Network [OSTI]

    Appendix L Yakima Subbasin Plan Inventory of Existing Activities (http://clientzone.golder.com/YSBI) The Inventory element in the Yakima Subbasin plan is intended to summarize fish and wildlife protection. The Inventory will be updated as the Yakima Subbasin Plan gets updated. This iterative process will allow us

  1. EXHIBITION & SPONSORSHIP Sponsorship and Advertisement opportunities exist.

    E-Print Network [OSTI]

    Kumar, M. Jagadesh

    opportunities exist. Sponsors will get an opportunity to make product presentations, display table top products/catalogues at the conference venue oTable top display of products at the conference venue oProduct presentation during and technical tours will focus on RAC and IAQ projects. NCRAC-2013 3rd National Conference on Refrigeration

  2. Building America Technology Solutions for New and Existing Homes...

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

    for New and Existing Homes: Selecting Ventilation Systems for Existing Homes Building America Technology Solutions for New and Existing Homes: Selecting Ventilation...

  3. Chimera states: The Existence Criteria Revisited

    E-Print Network [OSTI]

    Gautam C Sethia; Abhijit Sen

    2014-04-09T23:59:59.000Z

    Chimera states, representing a spontaneous break-up of a population of identical oscillators that are identically coupled, into sub-populations displaying synchronized and desynchronized behavior, have traditionally been found to exist in weakly coupled systems and with some form of nonlocal coupling between the oscillators. Here we show that neither the weak-coupling approximation nor nonlocal coupling are essential conditions for their existence. We obtain for the first time amplitude-mediated chimera states in a system of globally coupled complex Ginzburg-Landau oscillators. We delineate the dynamical origins for the formation of such states from a bifurcation analysis of a reduced model equation and also discuss the practical implications of our discovery of this broader class of chimera states.

  4. Overview of Existing Wind Energy Ordinances

    SciTech Connect (OSTI)

    Oteri, F.

    2008-12-01T23:59:59.000Z

    Due to increased energy demand in the United States, rural communities with limited or no experience with wind energy now have the opportunity to become involved in this industry. Communities with good wind resources may be approached by entities with plans to develop the resource. Although these opportunities can create new revenue in the form of construction jobs and land lease payments, they also create a new responsibility on the part of local governments to ensure that ordinances will be established to aid the development of safe facilities that will be embraced by the community. The purpose of this report is to educate and engage state and local governments, as well as policymakers, about existing large wind energy ordinances. These groups will have a collection of examples to utilize when they attempt to draft a new large wind energy ordinance in a town or county without existing ordinances.

  5. Flow chamber

    DOE Patents [OSTI]

    Morozov, Victor (Manassas, VA)

    2011-01-18T23:59:59.000Z

    A flow chamber having a vacuum chamber and a specimen chamber. The specimen chamber may have an opening through which a fluid may be introduced and an opening through which the fluid may exit. The vacuum chamber may have an opening through which contents of the vacuum chamber may be evacuated. A portion of the flow chamber may be flexible, and a vacuum may be used to hold the components of the flow chamber together.

  6. Geological flows

    E-Print Network [OSTI]

    Yu. N. Bratkov

    2008-11-19T23:59:59.000Z

    In this paper geology and planetology are considered using new conceptual basis of high-speed flow dynamics. Recent photo technics allow to see all details of a flow, 'cause the flow is static during very short time interval. On the other hand, maps and images of many planets are accessible. Identity of geological flows and high-speed gas dynamics is demonstrated. There is another time scale, and no more. All results, as far as the concept, are new and belong to the author. No formulae, pictures only.

  7. Energy and Environment: Progress and Existence Energy Provides Existence and Is Cause for Change (hopefully Progress)

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    Energy and Environment: Progress and Existence Energy Provides Existence and Is Cause for Change (hopefully Progress) Energy is possessed (thus equilibrium property) by material systems and redistributed-displacement interactions (process) towards the equilibrium (equi- partition of energy over mass and space); thus energy

  8. Experiences in enhancing existing BPM Tools with BPEL Import and Export

    E-Print Network [OSTI]

    Zdun, Uwe

    Experiences in enhancing existing BPM Tools with BPEL Import and Export Jan Mendling1 , Kristian available BPEL implementations see [8]. This broad in- dustry acceptance forces other workflow and BPM of the BPM tool and BPEL. In particular, the mapping of control flow is a non- trivial task, especially

  9. TI 176C Flow Rate Audits and Adjustment TABLE OF CONTENTS

    E-Print Network [OSTI]

    Fischer, Emily V.

    AND APPLICABILITY This standard operating procedure (SOP) describes the procedures for performing initial and final. The procedures followed in this situation are similar to those followed during site set up or annual maintenance, except that they are performed by the site operator rather than by field technicians. The procedure

  10. New Report Characterizes Existing Offshore Wind Grid Interconnection...

    Office of Environmental Management (EM)

    New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities September 3,...

  11. Energy Savings Measure Packages: Existing Homes

    SciTech Connect (OSTI)

    Casey, S.; Booten, C.

    2011-11-01T23:59:59.000Z

    This document presents the most cost effective Energy Savings Measure Packages (ESMP) for existing mixed-fuel and all electric homes to achieve 15% and 30% savings for each BetterBuildings grantee location across the US. These packages are optimized for minimum cost to homeowners for given source energy savings given the local climate and prevalent building characteristics (i.e. foundation types). Maximum cost savings are typically found between 30% and 50% energy savings over the reference home. The dollar value of the maximum annual savings varies significantly by location but typically amounts to $300 - $700/year.

  12. Catalyst immobilization techniques for continuous flow synthesis

    E-Print Network [OSTI]

    Nagy, Kevin David

    2012-01-01T23:59:59.000Z

    Catalytic processes are ubiquitous in both research and industrial settings. As continuous flow processes continue to gain traction in research labs and fine and pharmaceutical chemical processes, new opportunities exist ...

  13. GLOBAL GLACIAL ISOSTATIC ADJUSTMENT: TARGET FIELDS FOR SPACE GEODESY

    E-Print Network [OSTI]

    Peltier, W. Richard

    GLOBAL GLACIAL ISOSTATIC ADJUSTMENT: TARGET FIELDS FOR SPACE GEODESY W.R. Peltier Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S-1A7 peltier) and Sabadini and Peltier (1981) whose analysis was based upon the application of a homogeneous viscoelastic

  14. Respiratory and Cardiovascular Adjustments to Exercise in Reptiles

    E-Print Network [OSTI]

    Bennett, Albert F.

    challenges to the respiratory system of reptiles. Incrementing aerobic metabolism above resting levelsRespiratory and Cardiovascular Adjustments to Exercise in Reptiles T.T. GLEESON ' and A.F. BEN NETT all levels of activity (Fig. lb). The mechanism for an- aerobic energy production during exercise

  15. Sensitivity of health risk estimates to air quality adjustment procedure

    SciTech Connect (OSTI)

    Whitfield, R.G.

    1997-06-30T23:59:59.000Z

    This letter is a summary of risk results associated with exposure estimates using two-parameter Weibull and quadratic air quality adjustment procedures (AQAPs). New exposure estimates were developed for children and child-occurrences, six urban areas, and five alternative air quality scenarios. In all cases, the Weibull and quadratic results are compared to previous results, which are based on a proportional AQAP.

  16. Estimation in Covariate Adjusted Regression Damla Senturk1

    E-Print Network [OSTI]

    Sentürk, Damla

    confounder in a multiplicative fashion. One example is data collected for a study on diabetes, where adjusted for the effects of the confounders. One example is data collected for a study on diabetes (Willems for diabetes, including cholesterol and hypertension, and diagnostic variables, such as glycosolated hemoglobin

  17. Saving Energy by Adjusting Transmission Power in Wireless Sensor Networks

    E-Print Network [OSTI]

    Rowe, Neil C.

    Saving Energy by Adjusting Transmission Power in Wireless Sensor Networks Xiao Chen Department and communication areas. Energy-efficient communication is an important issue in WSNs because of the limited power propose methods to reduce communication energy by minimizing the total sensor trans- mission power

  18. On Adjusting Power to Defend Wireless Networks from Jamming

    E-Print Network [OSTI]

    Xu, Wenyuan

    1 On Adjusting Power to Defend Wireless Networks from Jamming Wenyuan Xu Department of Computer}@engr.sc.edu Abstract-- Wireless networks are susceptible to accidental or intentional radio interference. One way, we turn to examining the more complicated scenario consisting of a multi- hop wireless network. We

  19. Ihsan Yaniko No. 2013-022 ADJUSTABLE ROBUST PARAMETER ...

    E-Print Network [OSTI]

    BruijnC

    2013-03-21T23:59:59.000Z

    Mar 21, 2013 ... The goal of many experiments is to estimate the best solution for a ... Output may be univariate (a single or scalar response) or multivariate ... second type of inputs is not controlled by the users; e.g., demand in an inventory system. ...... practice, a part of the controllable factors can often be adjusted after ...

  20. OPERATIONAL BUDGET ADJUSTMENTS: FOCUSING RESOURCES TO 2016 AND BEYOND

    E-Print Network [OSTI]

    Saskatchewan, University of

    OPERATIONAL BUDGET ADJUSTMENTS: FOCUSING RESOURCES TO 2016 AND BEYOND EMMA LAKE KENDERDINE CAMPUS. This decision, while difficult, was necessary in a time of budget restraint. In addition to saving budget, in 2008 the Provost's Committee on Integrated Planning (PCIP) began providing an annual

  1. Bias adjustment of radar-based 3-hour precipitation accumulations

    E-Print Network [OSTI]

    Stoffelen, Ad

    projection of KNMI radar images 55 4 #12;Chapter 1 Introduction Since June 2003 a daily gauge is generated at 1400 UTC when the majority of the manual gauge observations have been reported. The radar-gaugeBias adjustment of radar-based 3-hour precipitation accumulations Iwan Holleman Technical Report

  2. Movement Planning and Simulation for Attitude Adjustment of a Drilling Robot

    E-Print Network [OSTI]

    Movement Planning and Simulation for Attitude Adjustment of a Drilling Robot Chengkun Wang planning method for attitude adjustment of a drilling robot is presented in this paper. The double eccentric discs normal adjustment mechanism is used in the robot to adjust the attitude of the drill axis

  3. Positive materials identification of existing equipment

    SciTech Connect (OSTI)

    Wolf, H.A. [Exxon Research and Engineering Co., Florham Park, NJ (United States)

    1996-07-01T23:59:59.000Z

    Considerable engineering effort and expertise are expended for materials selection at refining and petrochemical facilities. However, the benefits of this effort are undermined if there is an inadvertent material substitution during construction. Although procedures have always been in place to reduce the chance of such substitutions, it is known that these errors have occurred. Accordingly, over the years the industry has periodically reviewed and improved quality control in this effort. However, many older facilities that did not benefit from today`s procedures are still in operation. As a consequence, some companies have conducted positive material identification (PMI) verification of existing equipment. This process is further complicated by the fact that the most susceptible components are typically insulated and must be located. Once located, accessibility and operating temperatures are complicating issues. This paper describes prioritization issues and hardware tradeoffs for conducting a PMI verification program.

  4. Method, system and apparatus for monitoring and adjusting the quality of indoor air

    DOE Patents [OSTI]

    Hartenstein, Steven D.; Tremblay, Paul L.; Fryer, Michael O.; Hohorst, Frederick A.

    2004-03-23T23:59:59.000Z

    A system, method and apparatus is provided for monitoring and adjusting the quality of indoor air. A sensor array senses an air sample from the indoor air and analyzes the air sample to obtain signatures representative of contaminants in the air sample. When the level or type of contaminant poses a threat or hazard to the occupants, the present invention takes corrective actions which may include introducing additional fresh air. The corrective actions taken are intended to promote overall health of personnel, prevent personnel from being overexposed to hazardous contaminants and minimize the cost of operating the HVAC system. The identification of the contaminants is performed by comparing the signatures provided by the sensor array with a database of known signatures. Upon identification, the system takes corrective actions based on the level of contaminant present. The present invention is capable of learning the identity of previously unknown contaminants, which increases its ability to identify contaminants in the future. Indoor air quality is assured by monitoring the contaminants not only in the indoor air, but also in the outdoor air and the air which is to be recirculated. The present invention is easily adaptable to new and existing HVAC systems. In sum, the present invention is able to monitor and adjust the quality of indoor air in real time by sensing the level and type of contaminants present in indoor air, outdoor and recirculated air, providing an intelligent decision about the quality of the air, and minimizing the cost of operating an HVAC system.

  5. Evaluating Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, R.; Arena, L.

    2013-02-01T23:59:59.000Z

    During the course of this project, an affordable and high performance ductwork system to directly address the problems of thermal losses, poor efficiency, and air leakage was designed. To save space and enable direct connections between different floors of the building, the ductwork system was designed in such a way that it occupied interior or exterior frame wall cavities. The ductwork system satisfied building regulations for structural support when bridging multiple floors, the spread of fire and smoke, and insulation to reduce the heat flow into or out of the building. Retrofits of urban residential buildings will be the main focus for the application of this ductwork system. Highly reflective foils and insulating materials were used to aid in the increase of the overall R-value of the ductwork itself and the wall assembly. It is expected that the proposed system will increase the efficiency of the HVAC system and the thermal resistance of the building envelope. The performance of the proposed ductwork design was numerically evaluated in a number of different ways. Our results indicate that the duct method is a very cost attractive alternative to the conventional method.

  6. Adjustable Speed Drives as Applied to Centrifugal Pumps

    E-Print Network [OSTI]

    Jarc, D. A.; Robechek, J. D.; Connors, D. P.

    1982-01-01T23:59:59.000Z

    Required Power In addition to energy savings, which are discussed in detail later, operation at reduced pressures can result in longer pump seal life, reduced impeller wear, and less system vibration and noise. These benefits could provide additional... FLOW CONTROL TECHNIQUES Historically, centrifugal pumps have been driven by fixed speed A-C motors and reduced flow has been achieved by using control valves as shown in Figure 8. Closing the valve reduces the flow by increasing the friction...

  7. System for sensing droplet formation time delay in a flow cytometer

    DOE Patents [OSTI]

    Van den Engh, Ger (Seattle, WA); Esposito, Richard J. (Seattle, WA)

    1997-01-01T23:59:59.000Z

    A droplet flow cytometer system which includes a system to optimize the droplet formation time delay based on conditions actually experienced includes an automatic droplet sampler which rapidly moves a plurality of containers stepwise through the droplet stream while simultaneously adjusting the droplet time delay. Through the system sampling of an actual substance to be processed can be used to minimize the effect of the substances variations or the determination of which time delay is optimal. Analysis such as cell counting and the like may be conducted manually or automatically and input to a time delay adjustment which may then act with analysis equipment to revise the time delay estimate actually applied during processing. The automatic sampler can be controlled through a microprocessor and appropriate programming to bracket an initial droplet formation time delay estimate. When maximization counts through volume, weight, or other types of analysis exists in the containers, the increment may then be reduced for a more accurate ultimate setting. This may be accomplished while actually processing the sample without interruption.

  8. A VLSI Design Flow for Secure Side-Channel Attack Resistant ICs and Ingrid Verbauwhede1,2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A VLSI Design Flow for Secure Side-Channel Attack Resistant ICs Kris Tiri1 and Ingrid Verbauwhede1 VLSI design flow to create secure, side-channel attack (SCA) resistant integrated circuits. The design standard cell design flow. We discuss the basis for side-channel attack resistance and adjust the library

  9. Modernization of existing VVER-1000 surveillance programs

    SciTech Connect (OSTI)

    Kochkin, V.; Erak, D.; Makhotin, D. [NRC 'Kurchatov Inst.', 1 Kurchatov Square, Moscow 123182 (Russian Federation)

    2011-07-01T23:59:59.000Z

    According to generally accepted world practice, evaluation of the reactor pressure vessel (RPV) material behavior during operation is carried out using tests of surveillance specimens. The main objective of the surveillance program consists in insurance of safe RPV operation during the design lifetime and lifetime-extension period. At present, the approaches of pressure vessels residual life validation based on the test results of their surveillance specimens have been developed and introduced in Russia and are under consideration in other countries where vodo-vodyanoi energetichesky reactors- (VVER-) 1000 are in operation. In this case, it is necessary to ensure leading irradiation of surveillance specimens (as compared to the pressure vessel wall) and to provide uniformly irradiated specimen groups for mechanical testing. Standard surveillance program of VVER-1000 has several significant shortcomings and does not meet these requirements. Taking into account program of lifetime extension of VVER-1000 operating in Russia, it is necessary to carry out upgrading of the VVER-1000 surveillance program. This paper studies the conditions of a surveillance specimen's irradiation and upgrading of existing sets to provide monitoring and prognosis of RPV material properties for extension of the reactor's lifetime up to 60 years or more. (authors)

  10. Measurement of steam quality in two-phase critical flow

    E-Print Network [OSTI]

    Sinclair, John William

    1984-01-01T23:59:59.000Z

    flow orifice meter 4 Vapor-phase orifice meter 5 Steam quality adjustment valves 6 Critical flow test section 12 13 15 17 7 Two-phase mixture vent to atmosphere passage through test section 8 Fluke data logger 9 Condenser apparatus 18 21...-water 15 Steam quality as a function of vapor-phase Reynolds number for critical flow of steam-water . . . . . . . . , . . . . 48 16 Steam quality as a function of pressure measured upstream from critical flow orifice 17 Steam quality as a function...

  11. Stereoscopic PIV measurements of swirling flow entering a catalyst substrate

    SciTech Connect (OSTI)

    Persoons, T. [Trinity College Dublin, Mechanical Engineering Department, Parsons Building, Dublin 2 (Ireland); Vanierschot, M.; Van den Bulck, E. [Katholieke Universiteit Leuven, Department of Mechanical Engineering, Celestijnenlaan 300A, 3001 Leuven (Belgium)

    2008-09-15T23:59:59.000Z

    This experimental study investigates the stagnation region of a swirling flow entering an automotive catalyst substrate. A methodology is established using stereoscopic particle image velocimetry (PIV) to determine three-component velocity distributions up to 0.2 mm from the catalyst entrance face. In adverse conditions of strong out-of-plane velocity, PIV operating parameters are adjusted for maximum spatial correlation strength. The measurement distance to the catalyst is sufficiently small to observe radial flow spreading. A scaling analysis of the stagnation flow region provides a model for the flow uniformization as a function of the catalyst pressure drop. (author)

  12. Gasliquid two-phase flow patterns in a miniature square channel with a gas permeable sidewall

    E-Print Network [OSTI]

    Zhao, Tianshou

    configuration considered in this work, the stratified flow and wavy flow were not found in horizontal flow by a mono small-gas-bubble layer existing adjacent to the surface of the permeable sidewall in vertical downward flows; and Kosterin [5] and Brigham et al. [6] discussed flow patterns in inclined

  13. Adjustable Speed AC Motor Drives-Applications Problems

    E-Print Network [OSTI]

    Enjeti, P.

    Adjustable Speed AC Motor Drives Applications Problems by Dr. P. Enjeti Power Quality Laboratory Department ofElectrical Engineering Texas A&M University College Station, TX 77843 Tel: 409-845-7466 Fax: 409-845-6259 Email..., it generates side effects, some which have been recognized only recently. This paper presents a comprehensive coverage of application issues of PWM inverter controlled ac motor drives which include damage to motor insulation due to reflected voltages caused...

  14. Building America Technology Solutions for New and Existing Homes...

    Office of Environmental Management (EM)

    Existing Homes: Raised Ceiling Interior Duct System, New Smyrna, Florida (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Raised Ceiling Interior Duct...

  15. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Excavationless: Exterior-Side Foundation Insulation for Existing Homes (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Excavationless: Exterior-Side...

  16. Challenge # 2 Logistics and Compatibility with Existing Infrastructure...

    Office of Environmental Management (EM)

    2 Logistics and Compatibility with Existing Infrastructure Throughout Supply Chain Challenge 2 Logistics and Compatibility with Existing Infrastructure Throughout Supply Chain...

  17. Feasibility Study of Hydrogen Production at Existing Nuclear...

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

    Feasibility Study of Hydrogen Production at Existing Nuclear Power Plants Feasibility Study of Hydrogen Production at Existing Nuclear Power Plants A funding opportunity...

  18. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    New and Existing Homes: Replacement, Variable-Speed Motors for Furnaces, Syracuse, New York, (Fact Sheet) Building America Technology Solutions for New and Existing Homes:...

  19. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Technology Solutions for New and Existing Homes: Buried and Encapsulated Ducts, Jacksonville, Florida (Fact Sheet) Building America Technology Solutions for New and Existing Homes:...

  20. Flow preconditioner for electrostatic precipitator

    SciTech Connect (OSTI)

    Honacker, H.; Drlik, R.J.

    1980-01-01T23:59:59.000Z

    A flow preconditioner for an electrostatic precipitator removes particulate matter from a stream of polluted gas immediately after it passes through a tangential inlet at the lower end of a vertical cylindrical housing and straightens and divides the stream into laminations parallel to the axis of the housing. It comprises an annular ledge or choke ring extending inwardly from said housing above the inlet and an assembly of vanes above said ledge extending radially from the axis of the housing and angularly spaced apart. Each of said vanes has a flow receiving edge directed toward said inlet, a curved portion extending upwardly and away from said inlet, and a flat portion extending upwardly from said curved portion in a plane parallel to the housing axis. The curved portion of each vane defines a trough having a camber which gradually decreases along its span from the outer end of the vane towards the axis of the housng, together with means to vary the centrifugal flow distribution relative to the housing to render the preconditioner adjustable for various flow capacities.

  1. An existence result for multidimensional immiscible two-phase flows with discontinuous capillary pressure field

    E-Print Network [OSTI]

    Boyer, Edmond

    , but also discontinuous pressure fields (see [vDMdN95], [EEN98], [BDPvD03], [EEM06], [CGP09], [BLS09], [Can dimensions, unless some strong assumptions are made in order to reduce the problem (see [CGP09], [EEM06

  2. Methodology for extracting local constants from petroleum cracking flows

    DOE Patents [OSTI]

    Chang, Shen-Lin (Woodridge, IL); Lottes, Steven A. (Naperville, IL); Zhou, Chenn Q. (Munster, IN)

    2000-01-01T23:59:59.000Z

    A methodology provides for the extraction of local chemical kinetic model constants for use in a reacting flow computational fluid dynamics (CFD) computer code with chemical kinetic computations to optimize the operating conditions or design of the system, including retrofit design improvements to existing systems. The coupled CFD and kinetic computer code are used in combination with data obtained from a matrix of experimental tests to extract the kinetic constants. Local fluid dynamic effects are implicitly included in the extracted local kinetic constants for each particular application system to which the methodology is applied. The extracted local kinetic model constants work well over a fairly broad range of operating conditions for specific and complex reaction sets in specific and complex reactor systems. While disclosed in terms of use in a Fluid Catalytic Cracking (FCC) riser, the inventive methodology has application in virtually any reaction set to extract constants for any particular application and reaction set formulation. The methodology includes the step of: (1) selecting the test data sets for various conditions; (2) establishing the general trend of the parametric effect on the measured product yields; (3) calculating product yields for the selected test conditions using coupled computational fluid dynamics and chemical kinetics; (4) adjusting the local kinetic constants to match calculated product yields with experimental data; and (5) validating the determined set of local kinetic constants by comparing the calculated results with experimental data from additional test runs at different operating conditions.

  3. Steady periodic waves bifurcating for fixed-depth rotational flows

    E-Print Network [OSTI]

    consider steady periodic water waves for rotational flows with a specified fixed-depth over a flat bed. We the existence of steady periodic water waves for rotational flows with a specified fixed depth over a flat bedSteady periodic waves bifurcating for fixed-depth rotational flows David Henry School

  4. The Dynamics of SmallScale Turbulence Driven Flows

    E-Print Network [OSTI]

    Hammett, Greg

    the existence of a linearly undamped component of the flow which could build up in time and lower the finalThe Dynamics of Small­Scale Turbulence Driven Flows M. A. Beer and G. W. Hammett PPPL APS DPP meeting, November 1997 The dynamics of small­scale fluctuation driven flows are of great in­ terest

  5. 4. Network Flows 4.2 The Network Simplex Algorithm

    E-Print Network [OSTI]

    Krumke, Sven O.

    Contents 4. Network Flows 4.2 The Network Simplex Algorithm 1 #12;Starting Solutions Extend Set EB as all new edges, EL as all old edges 2 #12;Network Simplex Part I Require: Network N = (V , E #12;Network Simplex Part II 6: Adjust x: xij := xij + if (i, j) C+ es xij - if (i, j) C- es xij

  6. Energy-Efficient Variable-Flow Liquid Cooling in 3D Stacked Architectures

    E-Print Network [OSTI]

    Simunic, Tajana

    1 Energy-Efficient Variable-Flow Liquid Cooling in 3D Stacked Architectures Ayse K. Coskun , David not fully utilized. Thus, it is not energy-efficient to adjust the coolant flow rate based on the worst-case conditions, as this would cause an excess in pump power. For energy-efficient cooling, we propose a novel

  7. Economical Aspects of Adjustable Speed Drives in Pumping Systems

    E-Print Network [OSTI]

    Hovstadius, G.

    Speed variations of pumps have become increasingly popular as the technology to produce variable frequency drives has progressed. Variable speed drives have many advantages compared to throttle valves when it comes to regulation of flow. They offer...

  8. Maximum Network Lifetime in Wireless Sensor Networks with Adjustable Sensing Ranges

    E-Print Network [OSTI]

    Wu, Jie

    1 Maximum Network Lifetime in Wireless Sensor Networks with Adjustable Sensing Ranges Mihaela problem in wireless sensor networks with adjustable sensing range. Communication and sensing consume Wireless sensor networks (WSNs) constitute the foundation of a broad range of applications related

  9. Adjustable speed drives: Applications and R&D needs

    SciTech Connect (OSTI)

    Stefanovic, V.R.

    1995-09-01T23:59:59.000Z

    The largest opportunity for the growth of adjustable speed drives (ASDs) during the next 5-6 years is in pump, fan and compressor (PFC) applications where a constant, fixed speed operation is converted to adjustable speed in order to realize energy savings. Inverter supplied induction motors are and will continue to be predominately used in these applications. Over the long term (10-15 years), the greatest ASD growth is expected in large volume consumer applications: first in hybrid electric vehicles (EVs) and in residential heating, ventilation and air-conditioning (HVAC). Both induction and a variety of AC Permanent Magnet motors are expected to be the dominant technology in this new field. The traditional ASD applications in industries which require adjustable speed (such as machine tools, robotics, steel rolling, extruders, paper mill finishing lines, etc.) offer a relatively limited potential for above average ASD growth since most of these applications have already converted to electronic speed control. As a result, ASD growth in this sector will essentially track the growth of the corresponding industries. If realized, both short and long term ASD growth opportunities will result in significant advancements of ASD technology, which will then substantially affect all other, more fragmented, ASD applications. In fact, any single large volume ASD application will serve as a catalyst for improving ASD characteristics in all other ASD applications with the same voltage rating. ASD cost and reliability (defined in the context of application compatibility) are the two most important factors which will determine whether the ASD growth opportunities are realized. Conversely, any technological improvement which carries a cost increase will be restricted to niche applications, at best. Consequently, future R & D efforts should be directed to secure reduction in ASD cost and improvement in ASD reliability. A specific action plan is outlined in this report.

  10. Sonde Adjust Value-Added Product Technical Report

    SciTech Connect (OSTI)

    Troyan, D

    2012-01-09T23:59:59.000Z

    The Sonde Adjust (SONDEADJUST) value-added product (VAP) creates a file that includes all fields from original Atmospheric Radiation Measurement Climate Research Facility (ARM Facility) radiosonde files and contains several value-added fields that provide adjustments related to well-known humidity issues. SONDEADJUST produces data that correct documented biases in radiosonde humidity measurements. Previous efforts towards applying some of these corrections are available via the discontinued PI product sgpsondecorr1miloC1. Unique fields contained within this datastream include smoothed original relative humidity, dry bias corrected relative humidity, and final corrected relative humidity. The smoothed RH field refines the relative humidity from integers-the resolution of the instrument-to fractions of a percent. This profile is then used to calculate the dry bias corrected field. The final correction fixes the time-lag problem and uses the dry-bias field as input into the algorithm. In addition to dry bias, solar heating is another correction that is encompassed in the final corrected RH field. Output from SONDEADJUST differs from the previous RH-corrected datastreams in important ways. First, all three types of ARM radiosondes-Vaisala RS-80, RS-90, and RS-92-are corrected using dedicated procedures and/or parameters. Second, the output variables include all of those found in the original radiosonde file: dry bulb temperature, dewpoint temperature, wind speed, wind direction, eastward wind component, northward wind component, wind status (a Vaisala-produced field used in conjunction with the Loran system), ascent rate, and original relative humidity. Additional humidity fields are smoothed relative humidity, dry biased corrected relative humidity, final ambient relative humidity, and scaled adjusted relative humidity. Third, quality control (QC) flags of the fields from the original radiosonde datastream are brought into the SONDEADJUST output file. Additional QC variables are created for the new fields.

  11. Kansas Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Building FloorspaceThousandWithdrawals0.0Decade Year-0Base7 3 2 1301Adjustments

  12. Kentucky Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto China (Million Cubic Feet) Kenai, AK LiquefiedCubicAdjustments

  13. Mississippi Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto China (Million Cubic Feet)Commercialper Thousand70 349252Adjustments

  14. Texas Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122Commercial ConsumersThousandCubicSeparation 7,559 8,762 10,130Adjustments

  15. Alabama Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National and Regional Data; Row: NAICS8) Distribution Category UC-950 Cost and Quality of Fuels forA 6 J 9 U B u o f l d w3,290 2,871Adjustments

  16. Alaska Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National and Regional Data; Row: NAICS8) Distribution Category UC-950 Cost and Quality of Fuels forA 6 J 9 U B uYear Jan Feb MarAdjustments

  17. Colorado Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469 2,321Spain (Million Cubic 1.Year Jan3,302Adjustments

  18. West Virginia Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122Commercial602 1,397 125 Q 69 (Million Cubic58 810Year Jan Feb39,28720 21Adjustments

  19. Wyoming Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122Commercial602 1,397 125 Q 69 (MillionAdjustments (Billion Cubic Feet) Wyoming Dry

  20. U.S. Shale Proved Reserves Adjustments (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto17 34 44Year Jan Feb MarDecade Year-0 Year-1(Billion- -Adjustments

  1. Utah Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto17 34 44Year Jan Feb MarDecadeFour-Dimensional2009893 725Adjustments

  2. Oklahoma Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5 Tables July 1996 Energy Information Administration Office ofthroughYear Jan Feb Mar Apr May Jun Jul9Thousand CubicAdjustments (Billion

  3. Pennsylvania Dry Natural Gas Reserves Adjustments (Billion Cubic Feet)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5 Tables July 1996 Energy Information Administration Office ofthroughYear Jan Feb Mar Apr MayYear Jan MonthlyCubic17 34 44Adjustments

  4. Nuclear reactor downcomer flow deflector

    DOE Patents [OSTI]

    Gilmore, Charles B. (Greensburg, PA); Altman, David A. (Pittsburgh, PA); Singleton, Norman R. (Murrysville, PA)

    2011-02-15T23:59:59.000Z

    A nuclear reactor having a coolant flow deflector secured to a reactor core barrel in line with a coolant inlet nozzle. The flow deflector redirects incoming coolant down an annulus between the core barrel and the reactor vessel. The deflector has a main body with a front side facing the fluid inlet nozzle and a rear side facing the core barrel. The rear side of the main body has at least one protrusion secured to the core barrel so that a gap exists between the rear side of the main body adjacent the protrusion and the core barrel. Preferably, the protrusion is a relief that circumscribes the rear side of the main body.

  5. A review of statistical methods for the meteorological adjustment of tropospheric ozone

    E-Print Network [OSTI]

    Washington at Seattle, University of

    A review of statistical methods for the meteorological adjustment of tropospheric ozone Mary Lou adjustment of tropospheric ozone Mary Lou Thompson1 Joel Reynolds1 Lawrence H. Cox2 Peter Guttorp1 Paul D.larry@epamail.epa.gov ABSTRACT: A variety of statistical methods for meteorological adjustment of ozone have been proposed

  6. A survey of air flow models for multizone structures

    SciTech Connect (OSTI)

    Feustel, H.E.; Dieris, J.

    1991-03-01T23:59:59.000Z

    Air flow models are used to simulate the rates of incoming and outgoing air flows for a building with known leakage under given weather and shielding conditions. Additional information about the flow paths and air-mass flows inside the building can only by using multizone air flow models. In order to obtain more information on multizone air flow models, a literature review was performed in 1984. A second literature review and a questionnaire survey performed in 1989, revealed the existence of 50 multizone air flow models, all developed since 1966, two of which are still under development. All these programs use similar flow equations for crack flow but differ in the versatility to describe the full range of flow phenomena and the algorithm provided for solving the set of nonlinear equations. This literature review was found that newer models are able to describe and simulate the ventilation systems and interrelation of mechanical and natural ventilation. 27 refs., 2 figs., 1 tab.

  7. The Thermal Test and Analysis of Envelope in Existing Buildings

    E-Print Network [OSTI]

    Liu, X.; Li, X.; Sun, J.; Wang, Z.

    2006-01-01T23:59:59.000Z

    to improve the health and comfort and minimize the energy consumption costs of existing buildings is quite important. Improving existing buildings can be divided into two parts, envelope and heating system. Much research has been done on building conservation...

  8. Time-resolved fluorescence decay measurements for flowing particles

    DOE Patents [OSTI]

    Deka, C.; Steinkamp, J.A.

    1999-06-01T23:59:59.000Z

    Time-resolved fluorescence decay measurements are disclosed for flowing particles. An apparatus and method for the measurement and analysis of fluorescence for individual cells and particles in flow are described, wherein the rapid measurement capabilities of flow cytometry and the robust measurement and analysis procedures of time-domain fluorescence lifetime spectroscopy are combined. A pulse-modulated CW laser is employed for excitation of the particles. The characteristics and the repetition rate of the excitation pulses can be readily adjusted to accommodate for fluorescence decays having a wide range of lifetimes. 12 figs.

  9. A possible solution for the non-existence of time

    E-Print Network [OSTI]

    Hitoshi Kitada

    1999-11-17T23:59:59.000Z

    A possible solution for the problem of non-existence of universal time is given by utilizing Goedel's incompleteness theorem.

  10. Building America Technology Solutions for New and Existing Homes...

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

    (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Boiler Control Replacement for Hydronically Heated Multifamily Buildings, Cambridge,...

  11. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Insulation Retrofits for Cold Climates, Cloquet, Minnesota Building America Technology Solutions for New and Existing Homes: Durable Interior Foundation Insulation...

  12. Co-existence of states in quantum systems

    E-Print Network [OSTI]

    Yoritaka Iwata

    2014-07-26T23:59:59.000Z

    Co-existence of different states is a profound concept, which possibly underlies the phase transition and the symmetry breaking. Because of a property inherent to quantum mechanics (cf. uncertainty), the co-existence is expected to appear more naturally in quantum-microscopic systems than in macroscopic systems. In this paper a mathematical theory describing co-existence of states in quantum systems is presented, and the co-existence is classified into 9 types.

  13. Shared Signals: Using Existing Facility Meters for Energy Savings Verification

    E-Print Network [OSTI]

    McBride, J. R.; Bohmer, C. J.; Price, S. D.; Carlson, K.; Lopez, J.

    of metering. Facility engineers wonder whether existing meters can be used for savings verification purposes. They want to know whether an existing energy management and control system (EMCS) can serve double duty and be used for savings verification... an existing EMCS for energy savings verification purposes is even more complex. While at first glance the idea of using an existing EMCS for energy savings verification purposes seems absolutely reasonable, the practicality of the situation must...

  14. Microgravity Flow Regime Transition Modeling

    E-Print Network [OSTI]

    Shephard, Adam M.

    2010-07-14T23:59:59.000Z

    by Ghrist (2008) where an existing computer code, RELAP 5-3D, demonstrated the limitations of currently available computational modeling when applied to zero-g conditions. 1.2.2 EXPERIMENTAL APPARATUS All flow regime mapping experiments consist of a... ............................................................... 9 2.3 Dukler et al. 1988/Janicot 1988 ............................................. 9 2.4 Colin et al. 1991 .................................................................... 11 2.5 Huckerby and Rezkallah 1992...

  15. Programmable Differential Delay Circuit With Fine Delay Adjustment

    DOE Patents [OSTI]

    DeRyckere, John F. (Eau Claire, WI); Jenkins, Philip Nord (Eau Claire, WI); Cornett, Frank Nolan (Chippewa Falls, WI)

    2002-07-09T23:59:59.000Z

    Circuitry that provides additional delay to early arriving signals such that all data signals arrive at a receiving latch with same path delay. The delay of a forwarded clock reference is also controlled such that the capturing clock edge will be optimally positioned near quadrature (depending on latch setup/hold requirements). The circuitry continuously adapts to data and clock path delay changes and digital filtering of phase measurements reduce errors brought on by jittering data edges. The circuitry utilizes only the minimum amount of delay necessary to achieve objective thereby limiting any unintended jitter. Particularly, this programmable differential delay circuit with fine delay adjustment is designed to allow the skew between ASICS to be minimized. This includes skew between data bits, between data bits and clocks as well as minimizing the overall skew in a channel between ASICS.

  16. Adjustable Nonlinear Springs to Improve Efficiency of Vibration Energy Harvesters

    E-Print Network [OSTI]

    S. Boisseau; G. Despesse; B. Ahmed Seddik

    2015-06-01T23:59:59.000Z

    Vibration Energy Harvesting is an emerging technology aimed at turning mechanical energy from vibrations into electricity to power microsystems of the future. Most of present vibration energy harvesters are based on a mass spring structure introducing a resonance phenomenon that allows to increase the output power compared to non-resonant systems, but limits the working frequency bandwidth. Therefore, they are not able to harvest energy when ambient vibrations' frequencies shift. To follow shifts of ambient vibration frequencies and to increase the frequency band where energy can be harvested, one solution consists in using nonlinear springs. We present in this paper a model of adjustable nonlinear springs (H-shaped springs) and their benefits to improve velocity-damped vibration energy harvesters' (VEH) output powers. A simulation on a real vibration source proves that the output power can be higher in nonlinear devices compared to linear systems (up to +48%).

  17. Inventory of Existing Activity The goals of the Inventory of Existing Activities are to demonstrate: current management

    E-Print Network [OSTI]

    Inventory of Existing Activity Inventory The goals of the Inventory of Existing Activities description of the project and the results. Deschutes Subbasin Plan, Inventory Page I­1 #12;Inventory

  18. Energy and Reliability Considerations For Adjustable Speed Driven Pumps

    E-Print Network [OSTI]

    Casada, D.

    -frictional. In fact, some fluid systems are dominated by static, rather than frictional head. When there is static head in a fluid system, the system no longer follows the same rule that head is proportional to flow rate squared. Instead, there is a constant term...

  19. Existence and uniqueness of global classical solutions of a gradient ...

    E-Print Network [OSTI]

    2015-01-22T23:59:59.000Z

    This gradient flow is generated by the Laudau-de Gennes energy functional that ... feature of this evolution problem is that it is generated by an energy functional ...

  20. Power dissipation and time-averaged pressure in oscillating flow through a sudden area change

    E-Print Network [OSTI]

    Smith, Barton L.

    effects including boundary layer turbu- lence and random motions in separated flows. These losses fixed while varying the third. Evidence is presented that the losses due to oscillatory flow for steady flow are available, few such data exist for oscillatory flow in any geometry, despite the fact

  1. Freeway Short-Term Traffic Flow Forecasting by Considering Traffic Volatility Dynamics and Missing Data Situations

    E-Print Network [OSTI]

    Zhang, Yanru

    2012-10-19T23:59:59.000Z

    , assuming constant variance when perform forecasting. This method does not consider the volatility nature of traffic flow data. This paper demonstrated that the variance part of traffic flow data is not constant, and dependency exists. A volatility model...

  2. Reservoir analysis using production decline data and adjusted time

    E-Print Network [OSTI]

    McCray, Thomas Lee

    1990-01-01T23:59:59.000Z

    -pressure approximation which provides a straight- line relationship and allows us to determine shape factor and reserves. In the following section we verify this relationship with simulated data. VERIFICATION OF VARIABLE-PRESSURE APPROXIMATION WITH SIMULATED DATA We... = Dtt (37) Combining Eqs 35 and 37 45 (3g) This provides us with an analytical approach to decline curve analysis. Initial reserves in place can be determined by type curve matching post-transient flow data (which will match the empirical solutions...

  3. Dark Energy: Reason for the Existence of a Classical Universe?

    E-Print Network [OSTI]

    Huang, Peng; Li, Miao; Li, Nan

    2015-01-01T23:59:59.000Z

    Dark energy is investigated from the perspective of quantum cosmology. By treating the existence of a classical universe as a constraint, it is found that the normal ordering ambiguity factor q in Wheeler-DeWitt equation tends to take its value on domain (-1, 3). Furthermore, to ensure the existence of a classical universe, there must be dark energy in the universe. It is in this sense we propose that dark energy is the reason for the existence of a classical universe.

  4. Building America Technlogy Solutions for New and Existing Homes...

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

    Building America Technlogy Solutions for New and Existing Homes: Interior Foundation Insulation Upgrade - Minneapolis Residence (Fact Sheet) This interior foundation project...

  5. Building America Technlogy Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Building America Technlogy Solutions for New and Existing Homes: Interior Foundation Insulation Upgrade - Madison Residence (Fact Sheet) This basement insulation project included a...

  6. Building America Whole-House Solutions for Existing Homes: Cascade...

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

    & Publications Building America Whole-House Solutions for Existing Homes: Islip Housing Authority Energy Efficiency Turnover Protocols, Islip, New York Building America...

  7. Building America Technology Solutions for New and Existing Homes...

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

    Existing Homes: Duct Sealing Using Injected Spray Sealant In this project, the Raleigh Housing Authority worked with Building America team, the Advanced Residential Integrated...

  8. Building America Technology Solutions for New and Existing Homes...

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

    Impact of Infiltration and Ventilation on Measured Space Conditioning Energy and Moisture Levels in the Hot-Humid Climate Building America Technology Solutions for New and Existing...

  9. Building America Technology Solutions for New and Existing Homes...

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

    Systems, at two Chicago area multifamily buildings with existing OTR control. Advanced Boiler Load Monitoring Controllers More Documents & Publications Building America...

  10. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Building America Technology Solutions for New and Existing Homes: Measure Guideline: Guidance on Taped Insulating Sheathing Drainage Planes Building America Technology Solutions...

  11. Building America Whole-House Solutions for Existing Homes: Applying...

    Energy Savers [EERE]

    to Florida Local Government Retrofit Programs - Central Florida (Fact Sheet) Building America Whole-House Solutions for Existing Homes: Applying Best Practices to Florida...

  12. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Moisture Durability of Vapor Permeable Insulating Sheathing (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Moisture Durability of Vapor Permeable...

  13. Building America Whole-House Solutions for Existing Homes: National...

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

    National Grid Deep Energy Retrofit Pilot, Massachusetts and Rhode Island (Fact Sheet) Building America Whole-House Solutions for Existing Homes: National Grid Deep Energy Retrofit...

  14. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Balancing Hydronic Systems in Multifamily Buildings, Chicago, Illinois (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Balancing Hydronic Systems in...

  15. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Stand-off Furring in Deep Energy Retrofits Building America Technology Solutions for New and Existing Homes: Stand-off Furring in Deep Energy Retrofits This research project,...

  16. Building America Technology Solutions for New and Existing Homes...

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

    Homes: Field Testing of Compartmentalization Methods for Multifamily Construction Building America Technology Solutions for New and Existing Homes: Field Testing of...

  17. Building America Technology Solutions for New and Existing Homes...

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

    Conditioned Space in a Dropped Ceiling or Fur-down, Gainesville, Florida (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Duct in Conditioned Space in...

  18. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Boiler Control Replacement for Hydronically Heated Multifamily Buildings, Cambridge, Massachusetts Building America Technology Solutions for New and Existing Homes: Boiler Control...

  19. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Technology Solutions for New Manufactured Homes - Washington, Oregon, and Idaho Building America Technology Solutions for New and Existing Homes: Technology Solutions for New...

  20. Building America Whole-House Solutions for Existing Homes: Multifamily...

    Energy Savers [EERE]

    Multifamily Individual Heating and Ventilation Systems Building America Whole-House Solutions for Existing Homes: Multifamily Individual Heating and Ventilation Systems The...

  1. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Replacing Resistance Heating with Mini-Split Heat Pumps Building America Technology Solutions for New and Existing Homes: Replacing Resistance Heating with Mini-Split Heat Pumps In...

  2. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Ground Source Heat Pump Research, TaC Studios Residence, Atlanta, Georigia (Fact Sheet), Building America Technology Solutions for New and Existing Homes: Ground Source Heat Pump...

  3. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Building America Technology Solutions for New and Existing Homes: Performance of a Heat Pump Water Heater in the Hot-Humid Climate, Windermere, Florida (Fact Sheet) Building...

  4. Existence of solutions to boundary value problems for smectic liquid ...

    E-Print Network [OSTI]

    2009-05-25T23:59:59.000Z

    Existence of solutions to boundary value problems for smectic liquid crys- tals. Abstract. We investigate variational problems for an energy developed by the.

  5. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Performance of Houses With and Without Supplemental Dehumidification in a Hot-Humid Climate, New Orleans, Louisiana Building America Technology Solutions for New and Existing...

  6. Building America Technology Solutions for New and Existing Homes...

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

    Cladding Attachment Over Mineral Fiber Insulation Board - Ontario, Canada Building America Technology Solutions for New and Existing Homes: Cladding Attachment Over Mineral Fiber...

  7. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Applications, Ithaca, New York (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Optimizing Hydronic System Performance in Residential Applications,...

  8. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Insulated Siding Retrofit in a Cold Climate, New Paltz, New York Building America Technology Solutions for New and Existing Homes: Insulated Siding Retrofit in a Cold Climate, New...

  9. Building America Whole-House Solutions for Existing Homes: Islip...

    Energy Savers [EERE]

    Islip Housing Authority Energy Efficiency Turnover Protocols, Islip, New York Building America Whole-House Solutions for Existing Homes: Islip Housing Authority Energy Efficiency...

  10. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Evaluation of Ventilation Strategies in New Construction Multifamily Buildings, New York, New York (Fact Sheet) Building America Technology Solutions for New and Existing Homes:...

  11. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    Applications (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Optimizing Hydronic System Performance in Residential Applications (Fact Sheet) In this...

  12. Cascade Natural Gas- Conservation Incentives for Existing Homes

    Broader source: Energy.gov [DOE]

    Cascade Natural Gas offers a variety of incentives to residential customers for making energy efficiency improvements to existing homes. Eligible equipment includes furnaces, water heaters,...

  13. Building America Whole-House Solutions for Existing Homes: Inverted...

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

    Inverted Attic Bulkhead for HVAC Ductwork Building America Whole-House Solutions for Existing Homes: Inverted Attic Bulkhead for HVAC Ductwork This occupied test home received a...

  14. Building America Technology Solutions for New and Existing Homes...

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

    America Technology Solutions for New and Existing Homes: Field Performance of Heat Pump Water Heaters in the Northeast (Fact Sheet) Building America Technology Solutions for New...

  15. Pressure Regain Strategies for Existing Air Distribution Systems...

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

    Solutions for New and Existing Homes: New Insights for Improving the Designs of Flexible Duct Junction Boxes (Fact Sheet) Critical Question 5: What are Recent Innovations in...

  16. Multiphase Flow Analysis in Hydra-TH

    SciTech Connect (OSTI)

    Christon, Mark A. [Los Alamos National Laboratory; Bakosi, Jozsef [Los Alamos National Laboratory; Francois, Marianne M. [Los Alamos National Laboratory; Lowrie, Robert B. [Los Alamos National Laboratory; Nourgaliev, Robert [Idaho National Laboratory

    2012-06-20T23:59:59.000Z

    This talk presents an overview of the multiphase flow efforts with Hydra-TH. The presentation begins with a definition of the requirements and design principles for multiphase flow relevant to CASL-centric problems. A brief survey of existing codes and their solution algorithms is presented before turning the model formulation selected for Hydra-TH. The issues of hyperbolicity and wellposedness are outlined, and a three candidate solution algorithms are discussed. The development status of Hydra-TH for multiphase flow is then presented with a brief summary and discussion of future directions for this work.

  17. Adjustable Shock Test Sled for Haversine Pulses at 250 fps

    SciTech Connect (OSTI)

    Troy Hartwig; Brent Hower; Aaron Seaholm

    2008-05-05T23:59:59.000Z

    New test requirements were developed by Sandia National Laboratory to simulate a regime of shock testing not previously performed at the Kansas City Plant operated by Honeywell Federal Manufacturing & Technologies. These environments were unique in that they involved amplitude of shock >1000g with relatively long pulse durations (greater 5 ms but less than 10 ms) and involved velocity changes up to 235 ft/sec. Ten months were available to develop, design, manufacture and prove-in this new capability. We designed a new shock sled to deliver this new family of shock environments in a laboratory test. The performance range of the new sled includes five specific shocks (1000 g – 8 ms, 1300 - 6 ms, 1500 g – 5.4 ms, 1950 g – 6 ms, 2250 g – 5.4 ms; all haversine shaped), and it also incorporates adjustability to accommodate new shocks within this range. These shock environments result in velocity changes ranging from 160 fps to 250 fps. The test sled accommodates test articles weighing up to 20 lbs and measuring up to 10” along any axis.

  18. Apparatus for adjustably controlling valve movement and fuel injection

    SciTech Connect (OSTI)

    Miller, C.R.; Shyu, T.P.; Weber, J.R.

    1993-08-24T23:59:59.000Z

    Apparatus is described for adjustably controlling valve movement and fuel injection of an engine having at least one fuel injection system, one exhaust valve system, one intake valve system, a microprocessor controller for receiving input signals and delivering engine controlling electrical signals, and a liquid pressure system, comprising: a single piezoelectric motor connectable to the microprocessor controller and the liquid pressure system and being adapted to receive engine controlling electrical signals from the microprocessor and controllably delivering pressurized liquid signals to the liquid pressure system in response to the received signal; and a spool valve having a single spool, the valve having a plurality of inlets and outlets and being connectable to the liquid pressure system for receiving pressurized liquid signals therefrom and controllably moving the single spool of the spool valve and delivering valve and injection controlling signals to the valve systems and injector system and controlling both valve movement and fuel injection responsive to engine controlling electrical signals received by the piezoelectric motor.

  19. Capacitor charging FET switcher with controller to adjust pulse width

    DOE Patents [OSTI]

    Mihalka, Alex M. (Livermore, CA)

    1986-01-01T23:59:59.000Z

    A switching power supply includes an FET full bridge, a controller to drive the FETs, a programmable controller to dynamically control final output current by adjusting pulse width, and a variety of protective systems, including an overcurrent latch for current control. Power MOSFETS are switched at a variable frequency from 20-50 kHz to charge a capacitor load from 0 to 6 kV. A ferrite transformer steps up the DC input. The transformer primary is a full bridge configuration with the FET switches and the secondary is fed into a high voltage full wave rectifier whose output is connected directly to the energy storage capacitor. The peak current is held constant by varying the pulse width using predetermined timing resistors and counting pulses. The pulse width is increased as the capacitor charges to maintain peak current. A digital ripple counter counts pulses, and after the desired number is reached, an up-counter is clocked. The up-counter output is decoded to choose among different resistors used to discharge a timing capacitor, thereby determining the pulse width. A current latch shuts down the supply on overcurrent due to either excessive pulse width causing transformer saturation or a major bridge fault, i.e., FET or transformer failure, or failure of the drive circuitry.

  20. Flow stabilization with active hydrodynamic cloaks

    E-Print Network [OSTI]

    Urzhumov, Yaroslav A; 10.1103/PhysRevE.86.056313

    2012-01-01T23:59:59.000Z

    We demonstrate that fluid flow cloaking solutions based on active hydrodynamic metamaterials exist for two-dimensional flows past a cylinder in a wide range of Reynolds numbers, up to approximately 200. Within the framework of the classical Brinkman equation for homogenized porous flow, we demonstrate using two different methods that such cloaked flows can be dynamically stable for $Re$ in the range 5-119. The first, highly efficient, method is based on a linearization of the Brinkman-Navier-Stokes equation and finding the eigenfrequencies of the least stable eigen-perturbations; the second method is a direct, numerical integration in the time domain. We show that, by suppressing the Karman vortex street in the weekly turbulent wake, porous flow cloaks can raise the critical Reynolds number up to about 120, or five times greater than for a bare, uncloaked cylinder.

  1. Assessment of user satisfaction of restrooms with existing toilet fixtures and new low consumption fixtures

    E-Print Network [OSTI]

    Vankamamidi, Neelima Raman

    2004-11-15T23:59:59.000Z

    consumption automatic valves, such as, carrying capacities of reduced flows and about the overall cleanliness of the toilets (Reid, 1996). The low water quantities in the low consumption water closets may increase the ratio of solid waste in the drainpipe.... Surveys of complaints show that about 30-40% of the users were unhappy about cleanliness in restrooms (Thomas, 1998). 1.1 PROBLEM STATEMENT The purpose of the study is to analyze and compare the user satisfaction of the restrooms with existing toilet...

  2. EVALUATION OF CARBON DIOXIDE CAPTURE FROM EXISTING COAL FIRED PLANTS BY HYBRID SORPTION USING SOLID SORBENTS

    SciTech Connect (OSTI)

    Benson, Steven; Browers, Bruce; Srinivasachar, Srivats; Laudal, Daniel

    2014-12-31T23:59:59.000Z

    Under contract DE-FE0007603, the University of North Dakota conducted the project Evaluation of Carbon Dioxide Capture from Existing Coal Fired Plants by Hybrid Sorption Using Solid Sorbents. As an important element of this effort, a Technical and Economic Feasibility Study was conducted by Barr Engineering Co. (Barr) in association with the University of North Dakota. The assessment developed a process flow diagram, major equipment list, heat balances for the SCPC power plant, capital cost estimate, operating cost estimate, levelized cost of electricity, cost of CO2 capture ($/ton) and three sensitivity cases for the CACHYS™ process.

  3. Adjustment, Political Transition, and the Organization of Military Power in Nigeria

    E-Print Network [OSTI]

    Ihonvbere, Julius O.

    1991-01-01T23:59:59.000Z

    and Cambridge Universities in Nigeria, Lagos. May 1990. 44future after NOTES 1 "Nigeria: Taming the Army," AfricanPhillips, Economic Impact of Nigeria's Structural Adjustment

  4. ADJUSTMENT COSTS, LEARNING-BY-DOING, AND TECHNOLOGY ADOPTION UNDER UNCERTAINTY

    E-Print Network [OSTI]

    Pavlova, Anna

    2003-01-27T23:59:59.000Z

    We consider a variety of vintage capital models of a firm's choice of technology under uncertainty in the presence of adjustment costs and technology-specific learning. ...

  5. Asymmetric Price Adjustment and Consumer Search: An Examination of the Retail Gasoline Market

    E-Print Network [OSTI]

    Lewis, Matt

    2003-01-01T23:59:59.000Z

    The Behavior of Retail Gasoline Prices: Symmetric or Not? ”Adjustment of U.K. Retail Gasoline Prices to Cost Changes. ”documented that retail gasoline prices respond more quickly

  6. Asymmetric Price Adjustment and Consumer Search: An Examination of the Retail Gasoline Industry

    E-Print Network [OSTI]

    Lewis, Matt

    2003-01-01T23:59:59.000Z

    Adjustment of U.K. Retail Gasoline Prices to Cost Changes. ”The Behavior of Retail Gasoline Prices: Symmetric or Not? ”documented that retail gasoline prices respond more quickly

  7. Nonlinear springs with applications to flow regulation valves and mechanisms

    E-Print Network [OSTI]

    Freeman, David Calvin

    2008-01-01T23:59:59.000Z

    This thesis focuses on the application of nonlinear springs for fluid flow control valves where geometric constraints, or fabrication technologies, limit the use of available solutions. Types of existing nonlinear springs ...

  8. 2014 Across-Breed EPD Adjustment Factors Released When using EPDs, bulls from one breed cannot be compared to another unless an adjustment factor is used. Since 1993,

    E-Print Network [OSTI]

    Florida, University of

    Research Center in Clay Center, Nebraska have released adjustment factors for growth traits and maternal Tough Decisions I have heard several questions concerning 1.) Should I sell my calves at weaning?, And 2

  9. Extended cage adjustable speed electric motors and drive packages

    DOE Patents [OSTI]

    Hsu, John S. (Oak Ridge, TN)

    1999-01-01T23:59:59.000Z

    The rotor cage of a motor is extended, a second stator is coupled to this extended rotor cage, and the windings have the same number of poles. The motor torque and speed can be controlled by either injecting energy into or extracting energy out from the rotor cage. The motor produces less harmonics than existing doubly-fed motors. Consequently, a new type of low cost, high efficiency drive is produced.

  10. Building America Performance Analysis Procedures for Existing Homes

    SciTech Connect (OSTI)

    Hendron, R.

    2006-05-01T23:59:59.000Z

    Because there are more than 101 million residential households in the United States today, it is not surprising that existing residential buildings represent an extremely large source of potential energy savings. Because thousands of these homes are renovated each year, Building America is investigating the best ways to make existing homes more energy-efficient, based on lessons learned from research in new homes. The Building America program is aiming for a 20%-30% reduction in energy use in existing homes by 2020. The strategy for the existing homes project of Building America is to establish technology pathways that reduce energy consumption cost-effectively in American homes. The existing buildings project focuses on finding ways to adapt the results from the new homes research to retrofit applications in existing homes. Research activities include a combination of computer modeling, field demonstrations, and long-term monitoring to support the development of integrated approaches to reduce energy use in existing residential buildings. Analytical tools are being developed to guide designers and builders in selecting the best approaches for each application. Also, DOE partners with the U.S. Environmental Protection Agency (EPA) to increase energy efficiency in existing homes through the Home Performance with ENERGY STAR program.

  11. Bacteria in shear flow

    E-Print Network [OSTI]

    Marcos, Ph.D. Massachusetts Institute of Technology

    2011-01-01T23:59:59.000Z

    Bacteria are ubiquitous and play a critical role in many contexts. Their environment is nearly always dynamic due to the prevalence of fluid flow: creeping flow in soil, highly sheared flow in bodily conduits, and turbulent ...

  12. Dispersed flow film boiling

    E-Print Network [OSTI]

    Yoder, Graydon L.

    1980-01-01T23:59:59.000Z

    Dispersed flow consists of small liquid droplets entrained in a flowing vapor. This flow regime can occur in cryogenic equipment, in steam generators, and during nuclear reactor loss of coolant accidents. A theoretical ...

  13. Assembly flow simulation of a radar

    SciTech Connect (OSTI)

    Rutherford, W.C.; Biggs, P.M.

    1993-10-01T23:59:59.000Z

    A discrete event simulation model has been developed to predict the assembly flow time of a new radar product. The simulation was the key tool employed to identify flow constraints. The radar, production facility, and equipment complement were designed, arranged, and selected to provide the most manufacturable assembly possible. A goal was to reduce the assembly and testing cycle time from twenty-six weeks to six weeks. A computer software simulation package (SLAM II) was utilized as the foundation a for simulating the assembly flow time. FORTRAN subroutines were incorporated into the software to deal with unique flow circumstances that were not accommodated by the software. Detailed information relating to the assembly operations was provided by a team selected from the engineering, manufacturing management, inspection, and production assembly staff. The simulation verified that it would be possible to achieve the cycle time goal of six weeks. Equipment and manpower constraints were identified during the simulation process and adjusted as required to achieve the flow with a given monthly production requirement. The simulation is being maintained as a planning tool to be used to identify constraints in the event that monthly output is increased. ``What-if`` studies have been conducted to identify the cost of reducing constraints caused by increases in output requirement.

  14. Motor torque compensation of an induction electric motor by adjusting a slip command during periods of supposed change in motor temperature

    SciTech Connect (OSTI)

    Kelledes, William L. (Brighton, MI); St. John, Don K. (Livonia, MI)

    1992-01-01T23:59:59.000Z

    The present invention maintains constant torque in an inverter driven AC induction motor during variations in rotor temperature. It is known that the torque output of a given AC induction motor is dependent upon rotor temperature. At rotor temperatures higher than the nominal operating condition the rotor impedance increases, reducing the rotor current and motor torque. In a similar fashion, the rotor impedance is reduced resulting in increased rotor current and motor torque when the rotor temperature is lower than the nominal operating condition. The present invention monitors the bus current from the DC supply to the inverter and adjusts the slip frequency of the inverter drive to maintain a constant motor torque. This adjustment is based upon whether predetermined conditions implying increased rotor temperature or decreased rotor temperature exist for longer that a predetermined interval of time.

  15. Multiphase flow calculation software

    DOE Patents [OSTI]

    Fincke, James R. (Idaho Falls, ID)

    2003-04-15T23:59:59.000Z

    Multiphase flow calculation software and computer-readable media carrying computer executable instructions for calculating liquid and gas phase mass flow rates of high void fraction multiphase flows. The multiphase flow calculation software employs various given, or experimentally determined, parameters in conjunction with a plurality of pressure differentials of a multiphase flow, preferably supplied by a differential pressure flowmeter or the like, to determine liquid and gas phase mass flow rates of the high void fraction multiphase flows. Embodiments of the multiphase flow calculation software are suitable for use in a variety of applications, including real-time management and control of an object system.

  16. MODELING BLOOD FLOW IN THE CARDIOVASCULAR

    E-Print Network [OSTI]

    Olufsen, Mette Sofie

    MODELING BLOOD FLOW IN THE CARDIOVASCULAR SYSTEM MA432 ­ Spring 2013 Department of Mathematics (Greek),...; Two distinct types of blood were thought to exist: § "Nutritive blood" was thought to be made by the liver and carried through veins to the organs, where it was consumed § "Vital blood

  17. MODELING BLOOD FLOW IN THE CARDIOVASCULAR

    E-Print Network [OSTI]

    Olufsen, Mette Sofie

    MODELING BLOOD FLOW IN THE CARDIOVASCULAR SYSTEM MA325 ­ Spring 2013 Department of Mathematics (Greek),...; Two distinct types of blood were thought to exist: § Nutritive blood was thought to be made by the liver and carried through veins to the organs, where it was consumed § Vital blood was thought

  18. APP M_EXISTING CONSERVATION.DOC 1 Appendix M: Summary of Existing Conservation Efforts in the Willamette Basin

    E-Print Network [OSTI]

    APP M_EXISTING CONSERVATION.DOC 1 Appendix M: Summary of Existing Conservation Efforts actions. (National Marine Fisheries Service. 2000. Conservation of Columbia Basin Fish--Final Basinwide of Land Management; Bureau of Reclamation; Environmental Protection Agency; Fish and Wildlife Service

  19. Control of flow through a vapor generator

    DOE Patents [OSTI]

    Radcliff, Thomas D.

    2005-11-08T23:59:59.000Z

    In a Rankine cycle system wherein a vapor generator receives heat from exhaust gases, provision is made to avoid overheating of the refrigerant during ORC system shut down while at the same time preventing condensation of those gases within the vapor generator when its temperature drops below a threshold temperature by diverting the flow of hot gases to ambient and to thereby draw ambient air through the vapor generator in the process. In one embodiment, a bistable ejector is adjustable between one position, in which the hot gases flow through the vapor generator, to another position wherein the gases are diverted away from the vapor generator. Another embodiment provides for a fixed valve ejector with a bias towards discharging to ambient, but with a fan on the downstream side of said vapor generator for overcoming this bias.

  20. A void distribution model-flashing flow

    SciTech Connect (OSTI)

    Riznic, J.; Ishii, M.; Afgan, N.

    1987-01-01T23:59:59.000Z

    A new model for flashing flow based on wall nucleations is proposed here and the model predictions are compared with some experimental data. In order to calculate the bubble number density, the bubble number transport equation with a distributed source from the wall nucleation sites was used. Thus it was possible to avoid the usual assumption of a constant bubble number density. Comparisons of the model with the data shows that the model based on the nucleation site density correlation appears to be acceptable to describe the vapor generation in the flashing flow. For the limited data examined, the comparisons show rather satisfactory agreement without using a floating parameter to adjust the model. This result indicated that, at least for the experimental conditions considered here, the mechanistic predictions of the flashing phenomenon is possible on the present wall nucleation based model.

  1. Ergonomics Self-Evaluation: Computer Workstation Step 1: Adjust the Chair

    E-Print Network [OSTI]

    Johnston, Daniel

    Ergonomics Self-Evaluation: Computer Workstation Step 1: Adjust the Chair a. Seat height ­ Adjust medical condition or ergonomic concern, contact the UT at Austin Occupational Health Program at 512.471.4OHP(4647). http://www.utexas.edu/hr/current/services/ohp.html Ergonomic evaluation services

  2. Emerging Furniture Design Challenges and Product Development -Plus-size Furniture and Adjustable Furniture

    E-Print Network [OSTI]

    Emerging Furniture Design Challenges and Product Development - Plus-size Furniture and Adjustable population, · Furniture with reduced environmental impact, · Furniture lifecycle and end-of-life disposal of Problem: Adjustable furniture is a high-end product which provides customers more options to increase

  3. Cyclical adjustment, capital-labor substitution and total factor productivity convergence East Germany after unification

    E-Print Network [OSTI]

    Pfeifer, Holger

    Cyclical adjustment, capital-labor substitution and total factor productivity convergence ­ East integration and massive help from the Federal Government East German productivity catching up faded out in the nineties. This paper presents panel-data estimates of the productivity adjustment based on a production

  4. A Bayesian method for linear, inequality-constrained adjustment and its application to GPS positioning

    E-Print Network [OSTI]

    Santerre, Rock

    A Bayesian method for linear, inequality-constrained adjustment and its application to GPS 2005 Abstract. One of the typical approaches to linear, inequality-constrained adjustment (LICA be improved significantly and the new approach is feasible. Key words: Linear, inequality-constrained

  5. Section 1 (For Expenditure Adjustments) EXPENDITURES FOR BUSINESS BUDGET BUDGET BUDGET BUDGET OFFICE USE

    E-Print Network [OSTI]

    Tennessee, University of

    DATE Section 1 (For Expenditure Adjustments) EXPENDITURES FOR BUSINESS BUDGET BUDGET BUDGET BUDGET AMOUNT AMOUNT AMOUNT CODE TOTAL FOR BUSINESS Section 2 (For Revenue and Other Adjustments) BUDGET BUDGET/Chief Administrative Officer Department Head Chief Business Officer Dean or Director Vice President for Budget

  6. Numerical simulation of three-dimensional electrical flow through geomaterials

    E-Print Network [OSTI]

    Akhtar, Anwar Saeed

    1998-01-01T23:59:59.000Z

    components in different arrangements (Mitchell 1993; Shang et al. 1995). These are very simple models and have been verified by experiments that consider only one-dimensional flow of current. In actual practice, current flow is three-dimensional around... the source. Methods do not exist to analyze three-dimensional current flow through circuit elements other than resistors. Thus, there is a need to develop methods to overcome these shortcomings. Electrical cone penetrometers have been used to convey...

  7. Retrofitting Existing Buildings for Demand Response & Energy Efficiency

    E-Print Network [OSTI]

    California at Los Angeles, University of

    Retrofitting Existing Buildings for Demand Response & Energy Efficiency www rate periods to avoid high charges. · Assembly Bill 1103 ­ Building Energy Efficiency Disclosure - Starting January 1, 2010, all commercial building lease transactions must disclose the energy efficiency

  8. Building America Technology Solutions for New and Existing Homes...

    Energy Savers [EERE]

    and Insulation Strategies on 1-12 Story Homes in Cold Climates, Minneapolis, MN Building America Technology Solutions for New and Existing Homes: Cost Analysis of Roof-Only...

  9. Do mirror planets exist in our solar system?

    E-Print Network [OSTI]

    R. Foot; Z. K. Silagadze

    2001-04-15T23:59:59.000Z

    Mirror matter is predicted to exist if parity is an unbroken symmetry of nature. Currently, there is a large amount of evidence that mirror matter actually exists coming from astrophysics and particle physics. One of the most fascinating (but speculative) possibilities is that there is a significant abundance of mirror matter within our solar system. If the mirror matter condensed to form a large body of planatary or stellar mass then there could be interesting observable effects. Indeed studies of long period comets suggest the existence of a solar companion which has escaped direct detection and is therefore a candidate for a mirror body. Nemesis, hypothetical "death star" companion of the Sun, proposed to explain biological mass extinctions, may potentially be a mirror star. We examine the prospects for detecting these objects if they do indeed exist and are made of mirror matter.

  10. Effect of existing building on tunneling-induced ground movements

    E-Print Network [OSTI]

    Law, Rachel Hoi-chee

    2012-01-01T23:59:59.000Z

    The goal of this thesis is to assess the influence of an existing structure on tunneling-induced ground movements. This is accomplished through 2D numerical simulations that are compared with similar prior studies reported ...

  11. Retrofit of Existing Residential Building: a Case Study

    E-Print Network [OSTI]

    Zhao, L.; Xu, W.; Li, L.; Gao, G.

    2006-01-01T23:59:59.000Z

    retrofit of the envelope of existing residential buildings should be placed on the wall in northern region. It is possible to reduce about 50 percent of energy consumption of buildings by insulating the wall. The external insulation is suitable...

  12. Energy Efficiency Evaluation and Planning for Existing Buildings

    Broader source: Energy.gov [DOE]

    For meeting Federal sustainability requirements, agencies can use evaluation methods—such as benchmarking and energy audits—and planning to make their existing buildings energy efficient. To comply...

  13. Existence, uniqueness, and parametrization of Lagrangian invariant subspaces

    E-Print Network [OSTI]

    Freiling, G.; Mehrmann, V.; Xu, Hongguo

    2002-05-10T23:59:59.000Z

    The existence, uniqueness, and parametrization of Lagrangian invariant subspaces for Hamiltonian matrices is studied. Necessary and sufficient conditions and a complete parametrization are given. Some necessary and sufficient conditions...

  14. New York City- Energy Conservation Requirements for Existing Buildings

    Broader source: Energy.gov [DOE]

    In December 2009 the New York City Council enacted a series of bills intended to improve the energy efficiency of existing buildings in the city. Each of the four bills addresses a different aspect...

  15. Radiative Flow in a Luminous Disk II

    E-Print Network [OSTI]

    Jun Fukue

    2006-01-07T23:59:59.000Z

    Radiatively-driven transfer flow perpendicular to a luminous disk is examined in the subrelativistic regime of $(v/c)^1$, taking into account the gravity of the central object. The flow is assumed to be vertical, and the gas pressure is ignored, while internal heating is assumed to be proportional to the gas density. The basic equations were numerically solved as a function of the optical depth, and the flow velocity, the height, the radiative flux, and the radiation pressure were obtained for a given radius, an initial optical depth, and initial conditions at the flow base (disk ``inside''), whereas the mass-loss rate was determined as an eigenvalue of the boundary condition at the flow top (disk ``surface''). For sufficiently luminous cases, the flow resembles the case without gravity. For less-luminous cases, however, the flow velocity decreases, and the flow would be impossible due to the existence of gravity in the case that the radiative flux is sufficiently small. Application to a supercritical accretion disk with mass loss is briefly discussed.

  16. NOx Dispatching in Plant Utility Systems Using Existing Tools

    E-Print Network [OSTI]

    Nath, R.; Kumana, J. D.

    NO x DISPATCHING IN PLANT UTILITY SYSTEMS - USING EXISTING TOOLS Ravi Nath and Jimmy D. Kumana Linnhoff March ABSTRACT Localized NO x reduction during Ozone Alerts is a problem of increasing importance to process industries in and around.... Economic dispatching of plant utility systems is commonly done by the gas and electric power companies and software tools for such dispatching already exist even at the industrial plant level [2]. The purpose of this paper is to show...

  17. Possible existence of wormholes in the central regions of halos

    E-Print Network [OSTI]

    Farook Rahaman; P. Salucci; P. K. F. Kuhfittig; Saibal Ray; Mosiur Rahaman

    2015-01-05T23:59:59.000Z

    An earlier study [Rahaman et al. (2014) & Kuhfittig (2014)] has demonstrated the possible existence of wormholes in the outer regions of the galactic halo, based on the Navarro-Frenk-White (NFW) density profile. This paper uses the Universal Rotation Curve (URC) dark matter model to obtain analogous results for the central parts of the halo. This result is an important compliment to the earlier result, thereby confirming the possible existence of wormholes in most of the spiral galaxies.

  18. Freshwater Flow Charts - 1995

    SciTech Connect (OSTI)

    Kaiper, G V

    2003-11-21T23:59:59.000Z

    This report covers the following: (1) Explanation of Charts Showing Freshwater Flow in 1995; (2) Estimated U.S. Freshwater Flow in 1995 (chart); (3) Estimated California Freshwater Flow in 1995 (chart); (4) Estimated New Mexico Freshwater Flow in 1995 (chart); and (5) Web locations and credits.

  19. Magnetic Amplifier for Power Flow Control

    SciTech Connect (OSTI)

    None

    2012-02-24T23:59:59.000Z

    GENI Project: ORNL is developing an electromagnet-based, amplifier-like device that will allow for complete control over the flow of power within the electric grid. To date, complete control of power flow within the grid has been prohibitively expensive. ORNL’s controller could provide a reliable, cost-effective solution to this problem. The team is combining two types of pre-existing technologies to assist in flow control, culminating in a prototype iron-based magnetic amplifier. Ordinarily, such a device would require expensive superconductive wire, but the magnetic iron core of ORNL’s device could serve as a low-cost alternative that is equally adept at regulating power flow.

  20. Historical river flow rates for dose calculations

    SciTech Connect (OSTI)

    Carlton, W.H.

    1991-06-10T23:59:59.000Z

    Annual average river flow rates are required input to the LADTAP Computer Code for calculating offsite doses from liquid releases of radioactive materials to the Savannah River. The source of information on annual river flow rates used in dose calculations varies, depending on whether calculations are for retrospective releases or prospective releases. Examples of these types of releases are: Retrospective - releases from routine operations (annual environmental reports) and short term release incidents that have occurred. Prospective - releases that might be expected in the future from routine or abnormal operation of existing or new facilities (EIS`s, EID`S, SAR`S, etc.). This memorandum provides historical flow rates at the downstream gauging station at Highway 301 for use in retrospective dose calculations and derives flow rate data for the Beaufort-Jasper and Port Wentworth water treatment plants.

  1. Measuring Outdoor Air Intake Rates into Existing Building

    SciTech Connect (OSTI)

    Fisk, William; Sullivan, Douglas; Cohen, Sebastian; Han, Hwataik

    2009-04-16T23:59:59.000Z

    Practical and accurate technologies are needed for continuously measuring and controlling outdoor air (OA) intake rates in commercial building heating, ventilating, and air conditioning (HVAC) systems. This project evaluated two new measurement approaches. Laboratory experiments determined that OA flow rates were measurable with errors generally less than 10 percent using electronic air velocity probes installed between OA intake louver blades or at the outlet face of louvers. High accuracy was maintained with OA flow rates as low as 15 percent of the maximum for the louvers. Thus, with this measurement approach HVAC systems do not need separate OA intakes for minimum OA supply. System calibration parameters are required for each unique combination of louver type and velocity sensor location but calibrations are not necessary for each system installation. The research also determined that the accuracy of measuring OA flow rates with velocity probes located in the duct downstream of the intake louver was not improved by installing honeycomb airflow straighteners upstream of the probes. Errors varied with type of upstream louver, were as high as 100 percent, and were often greater than 25 percent. In conclusion, use of electronic air velocity probes between the blades of OA intake louvers or at the outlet face of louvers is a highly promising means of accurately measuring rates of OA flow into HVAC systems. The use of electronic velocity probes downstream of airflow straighteners is less promising, at least with the relatively small OA HVAC inlet systems employed in this research.

  2. High conduction neutron absorber to simulate fast reactor environment in an existing test reactor

    SciTech Connect (OSTI)

    Donna Post Guillen; Larry R. Greenwood; James R. Parry

    2014-06-22T23:59:59.000Z

    A new metal matrix composite material has been developed to serve as a thermal neutron absorber for testing fast reactor fuels and materials in an existing pressurized water reactor. The performance of this material was evaluated by placing neutron fluence monitors within shrouded and unshrouded holders and irradiating for up to four cycles. The monitor wires were analyzed by gamma and X-ray spectrometry to determine the activities of the activation products. Adjusted neutron fluences were calculated and grouped into three bins—thermal, epithermal, and fast—to evaluate the spectral shift created by the new material. A comparison of shrouded and unshrouded fluence monitors shows a thermal fluence decrease of ~11 % for the shielded monitors. Radioisotope activity and mass for each of the major activation products is given to provide insight into the evolution of thermal absorption cross-section during irradiation. The thermal neutron absorption capability of the composite material appears to diminish at total neutron fluence levels of ~8 × 1025 n/m2. Calculated values for dpa in excess of 2.0 were obtained for two common structural materials (iron and nickel) of interest for future fast flux experiments.

  3. Stopbands in the existence domains of acoustic solitons

    SciTech Connect (OSTI)

    Nsengiyumva, F., E-mail: franco.nseng@gmail.com; Hellberg, M. A., E-mail: hellberg@ukzn.ac.za; Mace, R. L., E-mail: macer@ukzn.ac.za [School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000 (South Africa); Verheest, F., E-mail: frank.verheest@ugent.be [School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000 (South Africa); Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B–9000 Gent (Belgium)

    2014-10-15T23:59:59.000Z

    A fully nonlinear Sagdeev pseudopotential approach is used to study the existence domain of fast mode ion-acoustic solitons in a three-species plasma composed of cold and warm adiabatic positive ion species and Boltzmann electrons. It is shown that for appropriate values of the cold-to-warm ion charge-to-mass ratio, ?, and the effective warm ion-to-electron temperature ratio, ?, there is a range in cold to warm ion charge density ratio, f, over which a stopband in soliton speed exists. Solitons do not propagate in the stopband, although they can occur for both higher and lower speeds. The stopbands are associated with a limiting curve of the existence domain that is double-valued in speed for a range of values of f. Analytical estimates of the upper and lower limits of ? and ? that support stopbands are found. It is suggested that, inter alia, the analysis should be applicable to the solar wind plasma.

  4. Existence domains of dust-acoustic solitons and supersolitons

    SciTech Connect (OSTI)

    Maharaj, S. K. [South African National Space Agency (SANSA) Space Science, PO Box 32, Hermanus 7200 (South Africa)] [South African National Space Agency (SANSA) Space Science, PO Box 32, Hermanus 7200 (South Africa); Bharuthram, R. [University of the Western Cape, Robert Sobukwe Road, Bellville 7535 (South Africa)] [University of the Western Cape, Robert Sobukwe Road, Bellville 7535 (South Africa); Singh, S. V.; Lakhina, G. S. [Indian Institute of Geomagnetism, New Panvel, Navi Mumbai 410218 (India)] [Indian Institute of Geomagnetism, New Panvel, Navi Mumbai 410218 (India)

    2013-08-15T23:59:59.000Z

    Using the Sagdeev potential method, the existence of large amplitude dust-acoustic solitons and supersolitons is investigated in a plasma comprising cold negative dust, adiabatic positive dust, Boltzmann electrons, and non-thermal ions. This model supports the existence of positive potential supersolitons in a certain region in parameter space in addition to regular solitons having negative and positive potentials. The lower Mach number limit for supersolitons coincides with the occurrence of double layers whereas the upper limit is imposed by the constraint that the adiabatic positive dust number density must remain real valued. The upper Mach number limits for negative potential (positive potential) solitons coincide with limiting values of the negative (positive) potential for which the negative (positive) dust number density is real valued. Alternatively, the existence of positive potential solitons can terminate when positive potential double layers occur.

  5. Existence of Optical Vortices in Saturable Non-linearity

    E-Print Network [OSTI]

    Luciano Medina

    2015-05-22T23:59:59.000Z

    Optical propagation in non-linear media and the formation of optical vortices as dark holes is an area of extensive research in modern optical physics. Governed by a non-linear Schr\\"odinger equation, with self-focusing saturable non-linearity, we establish an existence theory for a unique class of spatially localized beams describing ring-profile vortex solitons. Our first type of results are established via a constrained minimization problem. We prove the existence of positive radially symmetric solutions and give necessary conditions restricting the wave propagation constant in terms of the topological charge and saturation constant. As demanded by beam confinement, we prove the exponential decay of the soliton amplitude at infinity. Secondly, we use a min-max technique to prove the existence of additional non-trivial solutions that arise as saddle-points of a corresponding indefinite action functional.

  6. DRAFT August 29, 1998 The Dynamics of Small-Scale Turbulence-Driven Flows

    E-Print Network [OSTI]

    Hammett, Greg

    the existence of a linearly undamped component of the flow which could build up in time and lower the finalDRAFT August 29, 1998 The Dynamics of Small-Scale Turbulence-Driven Flows M. A. Beer and G. W the dynamics of small-scale turbulence-driven sheared ¢¡¤£ flows in nonlinear gyrofluid simulations

  7. FMDP reactor alternative summary report. Volume 1 - existing LWR alternative

    SciTech Connect (OSTI)

    Greene, S.R.; Bevard, B.B. [and others

    1996-10-07T23:59:59.000Z

    Significant quantities of weapons-usable fissile materials [primarily plutonium and highly enriched uranium (HEU)] are becoming surplus to national defense needs in both the United States and Russia. These stocks of fissile materials pose significant dangers to national and international security. The dangers exist not only in the potential proliferation of nuclear weapons but also in the potential for environmental, safety, and health (ES&H) consequences if surplus fissile materials are not properly managed. This document summarizes the results of analysis concerned with existing light water reactor plutonium disposition alternatives.

  8. Fluid flow control with transformation media

    E-Print Network [OSTI]

    Urzhumov, Yaroslav A

    2011-01-01T23:59:59.000Z

    We introduce a new concept for the manipulation of fluid flow around three-dimensional bodies. Inspired by transformation optics, the concept is based on a mathematical idea of coordinate transformations, and physically implemented with anisotropic porous media permeable to the flow of fluids. In two different situations - for an impermeable object situated either in a free-flowing fluid or in a fluid-filled porous medium - we show that the object can be coated with a properly chosen inhomogeneous, anisotropic permeable medium, such as to preserve the streamlines of flow and the pressure distribution that would have existed in the absence of the object. The proposed fluid flow cloak completely eliminates any disturbance of the flow by the object, including the downstream wake. Consequently, the structure helps prevent the onset of turbulence by keeping the flow laminar even above the typical critical Reynolds number for the object of the same shape and size. The cloak also cancels the viscous drag force. This...

  9. Wind Energy Development & Wildlife Striving for Co-existence

    E-Print Network [OSTI]

    McCalley, James D.

    Wind Energy Development & Wildlife ­ Striving for Co-existence Caroline Jezierski Nebraska Wind #12;Wind Energy Potential @ 30m http://www.nrel.gov/gis/images/30m_US_Wind.jpg #12;Wind Energy Potential @ 50m http://www.nrel.gov/gis/images/US-50m-wind-power-map.jpg #12;Wind Energy Potential @ 80m

  10. Opportunities for Achieving Significant Energy Reduction in Existing University Buildings

    E-Print Network [OSTI]

    Hutyra, Lucy R.

    Opportunities for Achieving Significant Energy Reduction in Existing University Buildings of Findings from GE 520/MN 500: "Energy Audit/Conservation Analysis of BU's Charles River Campus" 2010 #12 Footprint: Boston University Charles River Campus. Presentation to the BU Energy Club. Results of 2007

  11. Environmental Protection Agency within an existing facility if the effec-

    E-Print Network [OSTI]

    in the International Commission on Radiological Protection's Publica- tion No. 26. (b) Facility means all buildingsEnvironmental Protection Agency within an existing facility if the effec- tive dose equivalent term for use in this paragraph. A facility is eligible for this exemption only if, based on its last

  12. Instruction Guide Paying Vendors: Using the Find an Existing

    E-Print Network [OSTI]

    Watson, Craig A.

    . Enter a Voucher ID number to begin a search. For this example, enter "03036649". Click the Search of Florida, Gainesville, FL 32611 OVERVIEW Search for a voucher and retrieve the original voucher screen, click on Regular Entry. Click the Find an Existing Value tab. Example 1 Searching by Voucher ID 1

  13. Electrified thin films: Global existence of non-negative solutions

    E-Print Network [OSTI]

    Boyer, Edmond

    Electrified thin films: Global existence of non-negative solutions C. Imbert and A. Mellet February 6, 2012 Abstract We consider an equation modeling the evolution of a viscous liquid thin film equation, Non-local equation, Thin film equation, Non-negative solutions MSC: 35G25, 35K25, 35A01, 35B09 1

  14. Electrified thin films: Global existence of non-negative solutions

    E-Print Network [OSTI]

    Electrified thin films: Global existence of non-negative solutions C. Imbert and A. Mellet August 31, 2011 Abstract We consider an equation modeling the evolution of a viscous liquid thin film equation, Non-local equation, Thin film equation, Non-negative solutions MSC: 35G25, 35K25, 35A01, 35B09 1

  15. Electrified thin films: Global existence of non-negative solutions

    E-Print Network [OSTI]

    Electrified thin films: Global existence of non-negative solutions C. Imbert and A. Mellet February 4, 2011 Abstract We consider an equation modeling the evolution of a viscous liquid thin film equation, Non-local equation, Thin film equation, Non-negative solutions MSC: 35G25, 35K25, 35A01, 35B09 1

  16. WORKING PAPER N 2009 -38 Existence and stability of

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    generally that life expectancy is increasing with output per capita, and, thus, with individ- ual consumption, whatever the consumption level is. However, empirical evidence on the e¤ect of overconsumption life expectancy is a non-monotonic function of consumption. The existence, uniqueness and stability

  17. Integrated Ocean Drilling Program Hints for a Happy Existence

    E-Print Network [OSTI]

    Integrated Ocean Drilling Program #12;Hints for a Happy Existence #12;Accommodations Area QUIET your shift, take everything you need with you. · Quiet during boat drills · Unlock Bathroom Doors before, during, and soon after core is received #12;Movies · Selection of DVDs, VHS, and Laser Discs

  18. Existence of multimodal standing gravity waves Gerard Iooss

    E-Print Network [OSTI]

    Iooss, Gérard

    of Sciences, Lavryentyev pr. 15, Novosibirsk 630090, Russia. plotnikov@hydro.nsc.ru Abstract We consider two CNRS - UNSA, 1361 rte des Lucioles, 06560 Valbonne, France gerard.iooss@inln.cnrs.fr Russian academy of asymptotic expansion in powers of the amplitude , indicated in [2] and [3]. Each one of these solutions exist

  19. Psychological Characteristics and Adjustment in Caregivers of Children with Severe Neurodisability with Chronic Pulmunary Symptoms

    E-Print Network [OSTI]

    Blucker, Ryan Thomas

    2011-08-08T23:59:59.000Z

    -reported experiences related to general health and psychological adjustment. It was hypothesized that this specific group of caregivers would report relatively high levels of distress related to disability severity and resulting respiratory care management plan...

  20. Is the hourly data I get from NREL's PV Watts program adjusted...

    Open Energy Info (EERE)

    get from NREL's PV Watts program adjusted for daylight savings time. Home I take the hourly AC output numbers and apply them to a program I built that assigns a dollar value to the...

  1. E-Print Network 3.0 - adjusted d-dimer cut-off Sample Search...

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

    44 Study of the Response Function of the CUORE Bolometers towards a Neutrinoless Double Beta Decay Summary: sampling and cut-off frequency for each bolometer and adjust them...

  2. 31.01.01.V1.05 SALARY ADJUSTMENTS FOR INTERNATIONAL ASSIGNMENTS

    E-Print Network [OSTI]

    administered by the employee, or other measure of increased responsibility resulting from the assignment. 1 associated with a change in position. 2.00 GUIDELINES AND PROCEDURES 2.01 All salary adjustments

  3. Essays in Applied Macroeconomics: Asymmetric Price Adjustment, Exchange Rate and Treatment Effect

    E-Print Network [OSTI]

    Gu, Jingping

    2009-05-15T23:59:59.000Z

    -varying volatility of gasoline price disturbances is an important feature of the data, and when we allow for asymmetric GARCH errors and investigate the system wide impulse response function, we find evidence of asymmetric adjustment to crude oil price changes...

  4. Assessment of Dancoff adjusted Wigner-Seitz cells for self-shielding LWR lattices

    E-Print Network [OSTI]

    Roomy, Thomas Hayward

    2012-01-01T23:59:59.000Z

    The objective of this thesis was to assess the effectiveness of using a Wigner-Seitz (WS) cell with an adjusted moderator thickness to produce more accurate resonance self-shielded cross sections for light water reactor ...

  5. The relation between family functioning and psychological adjustment in children with asthma and children with diabetes

    E-Print Network [OSTI]

    Fontaine, Eve Nicole

    2007-04-25T23:59:59.000Z

    The goals of this study were to evaluate the relationships among family functioning, psychological adjustment, and health-related quality of life in children with asthma and children with diabetes. A secondary goal of this study was to examine...

  6. Design of an adjustable arm-supported table that is counterbalanced against gravity

    E-Print Network [OSTI]

    Olle, Chase R

    2013-01-01T23:59:59.000Z

    A prototype system was designed and constructed that used a wall-mounted, counterbalanced mechanical arm to support a workspace that can be adjusted for position. Possible applications of the system include use as a writing ...

  7. Power Compensation Effect of an Adjustable-Speed Rotary Condenser with a Flywheel for a Large Capacity Magnet Power Supply

    E-Print Network [OSTI]

    Akagi, H

    1999-01-01T23:59:59.000Z

    Power Compensation Effect of an Adjustable-Speed Rotary Condenser with a Flywheel for a Large Capacity Magnet Power Supply

  8. Conversion of existing tanker to North Sea FPSO use

    SciTech Connect (OSTI)

    Voorst, O. van; Baan, J. de; Loenhout, A. van; Krekel, M.

    1995-12-01T23:59:59.000Z

    The use of existing tankers as a permanently moored floating storage off loading (FSO) or floating production storage and off loading (FPSO) has been wide spread in the oil industry ever since tankers were used for storage. However, the application of an existing tanker for North Sea FPSO use meeting the stringent demands of the regulatory bodies and the harsh environment of the North Sea has withheld operators from using existing tankers in the North Sea. The acceptance of FPSO technology in the North Sea and the proven ability to moor a tanker with a passive mooring system in a harsh environment has opened the avenue to use existing tankers for use as an FPSO in the North Sea. This is also driven by the search for cost effective solutions for field development plans in order to make marginal fields economically exploitable. The potential reuse of an FPSO on a different location also makes the depreciation period of the FPSO vessel life related instead of field life related. Many issues related to the use of an FPSO in the North Sea are currently subject of papers at various forums. This paper, however, only addresses three crucial areas: (1) the criteria for selection of an existing tanker; (2) the use of a passive mooring system; (3) the fatigue assessment and required modifications. The paper is based on experiences gained during the engineering, design and construction phase of the UISGE GORM, the FPSO, which Bluewater will initially use for Amerada Hess Limited`s Fife Field on the UK continental shelf and confirms that the conversion of a suitable tanker to North Sea FPSO use is a technically flexible and an economically attractive solution.

  9. Uncertainty-based Estimation of the Secure Range for ISO New England Dynamic Interchange Adjustment

    SciTech Connect (OSTI)

    Etingov, Pavel V.; Makarov, Yuri V.; Wu, Di; Hou, Zhangshuan; Sun, Yannan; Maslennikov, S.; Luo, Xiaochuan; Zheng, T.; George, S.; Knowland, T.; Litvinov, E.; Weaver, S.; Sanchez, E.

    2014-04-14T23:59:59.000Z

    The paper proposes an approach to estimate the secure range for dynamic interchange adjustment, which assists system operators in scheduling the interchange with neighboring control areas. Uncertainties associated with various sources are incorporated. The proposed method is implemented in the dynamic interchange adjustment (DINA) tool developed by Pacific Northwest National Laboratory (PNNL) for ISO New England. Simulation results are used to validate the effectiveness of the proposed method.

  10. Denial of Service attacks: path reconstruction for IP traceback using Adjusted Probabilistic Packet Marking

    E-Print Network [OSTI]

    Dube, Raghav

    2005-02-17T23:59:59.000Z

    DENIAL OF SERVICE ATTACKS: PATH RECONSTRUCTION FOR IP TRACEBACK USING ADJUSTED PROBABILISTIC PACKET MARKING A Thesis by RAGHAV DUBE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2004 Major Subject: Electrical Engineering DENIAL OF SERVICE ATTACKS: PATH RECONSTRUCTION FOR IP TRACEBACK USING ADJUSTED PROBABILISTIC PACKET MARKING A Thesis by RAGHAV DUBE Submitted to Texas A&M University...

  11. Ultrasonic flow metering system

    DOE Patents [OSTI]

    Gomm, Tyler J. (Meridian, ID); Kraft, Nancy C. (Idaho Falls, ID); Mauseth, Jason A. (Pocatello, ID); Phelps, Larry D. (Pocatello, ID); Taylor, Steven C. (Idaho Falls, ID)

    2002-01-01T23:59:59.000Z

    A system for determining the density, flow velocity, and mass flow of a fluid comprising at least one sing-around circuit that determines the velocity of a signal in the fluid and that is correlatable to a database for the fluid. A system for determining flow velocity uses two of the inventive circuits with directional transmitters and receivers, one of which is set at an angle to the direction of flow that is different from the others.

  12. Elbow mass flow meter

    DOE Patents [OSTI]

    McFarland, Andrew R. (College Station, TX); Rodgers, John C. (Santa Fe, NM); Ortiz, Carlos A. (Bryan, TX); Nelson, David C. (Santa Fe, NM)

    1994-01-01T23:59:59.000Z

    Elbow mass flow meter. The present invention includes a combination of an elbow pressure drop generator and a shunt-type mass flow sensor for providing an output which gives the mass flow rate of a gas that is nearly independent of the density of the gas. For air, the output is also approximately independent of humidity.

  13. Methodology for Augmenting Existing Paths with Additional Parallel Transects

    SciTech Connect (OSTI)

    Wilson, John E.

    2013-09-30T23:59:59.000Z

    Visual Sample Plan (VSP) is sample planning software that is used, among other purposes, to plan transect sampling paths to detect areas that were potentially used for munition training. This module was developed for application on a large site where existing roads and trails were to be used as primary sampling paths. Gap areas between these primary paths needed to found and covered with parallel transect paths. These gap areas represent areas on the site that are more than a specified distance from a primary path. These added parallel paths needed to optionally be connected together into a single path—the shortest path possible. The paths also needed to optionally be attached to existing primary paths, again with the shortest possible path. Finally, the process must be repeatable and predictable so that the same inputs (primary paths, specified distance, and path options) will result in the same set of new paths every time. This methodology was developed to meet those specifications.

  14. Existence and unicity of co-moments in multisymplectic geometry

    E-Print Network [OSTI]

    Leonid Ryvkin; Tilmann Wurzbacher

    2014-11-09T23:59:59.000Z

    Given a multisymplectic manifold $(M,\\omega)$ and a Lie algebra $\\frak{g}$ acting on it by infinitesimal symmetries, Fregier-Rogers-Zambon define a homotopy (co-)moment as an $L_{\\infty}$-algebra-homomorphism from $\\frak{g}$ to the observable algebra $L(M,\\omega)$ associated to $(M,\\omega)$, in analogy with and generalizing the notion of a co-moment map in symplectic geometry. We give a cohomological characterization of existence and unicity for homotopy co-moment maps and show its utility in multisymplectic geometry by applying it to special cases as exact multisymplectic manifolds and simple Lie groups and by deriving from it existence results concerning partial co-moment maps, as e.g. covariant multimomentum maps and multi-moment maps.

  15. Crucial tests of the existence of a Time Operator

    E-Print Network [OSTI]

    Thomas Durt

    2010-03-14T23:59:59.000Z

    In the present paper we show that the Temporal Wave Function approach of the decay process, which is a multicomponent version of the Time Operator approach leads to new, non-standard, predictions concerning the statistical properties of decay time distributions of single kaons and entangled pairs of mesons. These results suggest crucial experimental tests for the existence of a Time Operator for the decay process to be realized in High Energy Physics or Quantum Optics.

  16. Integration of small taps into (existing) HVDC links

    SciTech Connect (OSTI)

    Bahrman, M. [ABB Power Systems, Pittsburgh, PA (United States)] [ABB Power Systems, Pittsburgh, PA (United States); Baker, M. [GEC Alsthom Engineering Systems Ltd., Whetstone (United Kingdom)] [GEC Alsthom Engineering Systems Ltd., Whetstone (United Kingdom); Bowles, J. [and others] [and others

    1995-07-01T23:59:59.000Z

    Tapping of HVDC lines to serve intermediate loads or to pick up dispersed generation has always presented formidable technical and economic challenges to transmission planners and to system designers. These challenges have been particularly daunting when the power rating of the tap is small compared to that of the main terminals. This document provides transmission planners with various factors which need to be considered in evaluating the feasibility of tapping existing HVDC transmission lines or in developing alternatives for potential new transmission schemes.

  17. Assessment of existing Sierra/Fuego capabilities related to grid-to-rod-fretting (GTRF).

    SciTech Connect (OSTI)

    Turner, Daniel Zack; Rodriguez, Salvador B.

    2011-06-01T23:59:59.000Z

    The following report presents an assessment of existing capabilities in Sierra/Fuego applied to modeling several aspects of grid-to-rod-fretting (GTRF) including: fluid dynamics, heat transfer, and fluid-structure interaction. We compare the results of a number of Fuego simulations with relevant sources in the literature to evaluate the accuracy, efficiency, and robustness of using Fuego to model the aforementioned aspects. Comparisons between flow domains that include the full fuel rod length vs. a subsection of the domain near the spacer show that tremendous efficiency gains can be obtained by truncating the domain without loss of accuracy. Thermal analysis reveals the extent to which heat transfer from the fuel rods to the coolant is improved by the swirling flow created by the mixing vanes. Lastly, coupled fluid-structure interaction analysis shows that the vibrational modes of the fuel rods filter out high frequency turbulent pressure fluctuations. In general, these results allude to interesting phenomena for which further investigation could be quite fruitful.

  18. Lateral flow strip assay

    DOE Patents [OSTI]

    Miles, Robin R. (Danville, CA); Benett, William J. (Livermore, CA); Coleman, Matthew A. (Oakland, CA); Pearson, Francesca S. (Livermore, CA); Nasarabadi, Shanavaz L. (Livermore, CA)

    2011-03-08T23:59:59.000Z

    A lateral flow strip assay apparatus comprising a housing; a lateral flow strip in the housing, the lateral flow strip having a receiving portion; a sample collection unit; and a reagent reservoir. Saliva and/or buccal cells are collected from an individual using the sample collection unit. The sample collection unit is immersed in the reagent reservoir. The tip of the lateral flow strip is immersed in the reservoir and the reagent/sample mixture wicks up into the lateral flow strip to perform the assay.

  19. Cost and Performance Model for Redox Flow Batteries

    SciTech Connect (OSTI)

    Viswanathan, Vilayanur V.; Crawford, Aladsair J.; Stephenson, David E.; Kim, Soowhan; Wang, Wei; Li, Bin; Coffey, Greg W.; Thomsen, Edwin C.; Graff, Gordon L.; Balducci, Patrick J.; Kintner-Meyer, Michael CW; Sprenkle, Vincent L.

    2014-02-01T23:59:59.000Z

    A cost model was developed for all vanadium and iron-vanadium redox flow batteries. Electrochemical performance modeling was done to estimate stack performance at various power densities as a function of state of charge. This was supplemented with a shunt current model and a pumping loss model to estimate actual system efficiency. The operating parameters such as power density, flow rates and design parameters such as electrode aspect ratio, electrolyte flow channel dimensions were adjusted to maximize efficiency and minimize capital costs. Detailed cost estimates were obtained from various vendors to calculate cost estimates for present, realistic and optimistic scenarios. The main drivers for cost reduction for various chemistries were identified as a function of the energy to power ratio of the storage system. Levelized cost analysis further guided suitability of various chemistries for different applications.

  20. MHD flows at astropauses and in astrotails

    E-Print Network [OSTI]

    Nickeler, Dieter H; Karlicky, Marian; Kraus, Michaela

    2015-01-01T23:59:59.000Z

    The geometrical shapes and the physical properties of stellar wind -- interstellar medium interaction regions form an important stage for studying stellar winds and their embedded magnetic fields as well as cosmic ray modulation. Our goal is to provide a proper representation and classification of counter-flow configurations and counter-flow interfaces in the frame of fluid theory. In addition we calculate flows and large-scale electromagnetic fields based on which the large-scale dynamics and its role as possible background for particle acceleration, e.g. in the form of anomalous cosmic rays, can be studied. We find that for the definition of the boundaries, which are determining the astropause shape, the number and location of magnetic null points and stagnation points is essential. Multiple separatrices can exist, forming a highly complex environment for the interstellar and stellar plasma. Furthermore, the formation of extended tail structures occur naturally, and their stretched field and streamlines pro...

  1. Viability of Existing INL Facilities for Dry Storage Cask Handling

    SciTech Connect (OSTI)

    Randy Bohachek; Charles Park; Bruce Wallace; Phil Winston; Steve Marschman

    2013-04-01T23:59:59.000Z

    This report evaluates existing capabilities at the INL to determine if a practical and cost effective method could be developed for opening and handling full-sized dry storage casks. The Idaho Nuclear Technology and Engineering Center (INTEC) CPP-603, Irradiated Spent Fuel Storage Facility, provides the infrastructure to support handling and examining casks and their contents. Based on a reasonable set of assumptions, it is possible to receive, open, inspect, remove samples, close, and reseal large bolted-lid dry storage casks at the INL. The capability can also be used to open and inspect casks that were last examined at the TAN Hot Shop over ten years ago. The Castor V/21 and REA-2023 casks can provide additional confirmatory information regarding the extended performance of low-burnup (<45 GWD/MTU) used nuclear fuel. Once a dry storage cask is opened inside CPP-603, used fuel retrieved from the cask can be packaged in a shipping cask, and sent to a laboratory for testing. Testing at the INL’s Materials and Fuels Complex (MFC) can occur starting with shipment of samples from CPP-603 over an on-site road, avoiding the need to use public highways. This reduces cost and reduces the risk to the public. The full suite of characterization methods needed to establish the condition of the fuel exists and MFC. Many other testing capabilities also exist at MFC, but when those capabilities are not adequate, samples can be prepared and shipped to other laboratories for testing. This report discusses how the casks would be handled, what work needs to be done to ready the facilities/capabilities, and what the work will cost.

  2. Expert Meeting Report: Windows Options for New and Existing Homes

    SciTech Connect (OSTI)

    Ojczyk, C.; Carmody, J.; Haglund, K.

    2013-05-01T23:59:59.000Z

    The NorthernSTAR Building America Partnership held an Expert Meeting on Windows Options for New and Existing Homes on November 14, 2011 at the Nolte Building on the campus of the University of Minnesota in Minneapolis, MN. Featured speakers included John Carmody and Pat Huelman of the University of Minnesota, Charlie Curcija of Lawrence Berkeley National Laboratory, Jim Larson of Cardinal Glass Industries, Peter Yost of Building Green, Peter Baker of Building Science Corporation, and Theresa Weston of Du Pont Innovations. Audience participation was actively encouraged during each presentation to uncover need and promote dialog among researchers and industry professionals.

  3. Do Supermassive Black Holes Exist at the Center of Galaxies?

    E-Print Network [OSTI]

    J. W. Moffat

    1998-03-22T23:59:59.000Z

    Models of superdense star clusters at the center of galaxies are investigated to see whether such objects can be stable and long-lived based on evaporation and collision time-scales and stability criteria. We find that physically reasonable models of massive clusters of stellar remnants can exist with masses $\\geq 10^6 M_{\\odot}$, which could simulate black holes at the center of galaxies with large $M/L$ ratios and gas motions of order $\\geq 10^3$ km $s^{-1}$. It follows that the evidence is not conclusive for massive dark objects at the center of galaxies being black holes.

  4. Existence and topological stability of Fermi points in multilayered graphene

    E-Print Network [OSTI]

    Juan L. Mañes; Francisco Guinea; María A. H. Vozmediano

    2007-04-23T23:59:59.000Z

    We study the existence and topological stability of Fermi points in a graphene layer and stacks with many layers. We show that the discrete symmetries (spacetime inversion) stabilize the Fermi points in monolayer, bilayer and multilayer graphene with orthorhombic stacking. The bands near $k=0$ and $\\epsilon=0$ in multilayers with the Bernal stacking depend on the parity of the number of layers, and Fermi points are unstable when the number of layers is odd. The low energy changes in the electronic structure induced by commensurate perturbations which mix the two Dirac points are also investigated.

  5. Whole-House Energy Analysis Procedures for Existing Homes: Preprint

    SciTech Connect (OSTI)

    Hendron, R.

    2006-08-01T23:59:59.000Z

    This paper describes a proposed set of guidelines for analyzing the energy savings achieved by a package of retrofits or an extensive rehabilitation of an existing home. It also describes certain field test and audit methods that can help establish accurate building system performance characteristics that are needed for a meaningful simulation of whole-house energy use. Several sets of default efficiency values have been developed for older appliances that cannot be easily tested and for which published specifications are not readily available. These proposed analysis procedures are documented more comprehensively in NREL Technical Report TP-550-38238.

  6. Review of existing residential energy efficiency certification and rating programs

    SciTech Connect (OSTI)

    Hendrickson, P.L.

    1986-11-01T23:59:59.000Z

    This report was prepared for the Office of Buildings and Community Systems, US Department of Energy (DOE). The principal objective of the report is to present information on existing Home Energy Rating Systems (HERS) and their features. Much of the information in this report updates a 1982 report (PNL-4359), also prepared by the Pacific Northwest Laboratory (PNL) for DOE. Secondary objectives of the report are to qualitatively examine the benefits and costs of HERS programs, review survey results on the attitudes of various user groups toward the programs, and discuss selected design and implementation issues.

  7. Expert Meeting Report: Windows Options for New and Existing Homes

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: Final EnvironmentalCounties,UnitedCommunication,1] Windows Options for New and Existing

  8. Investments in Existing Hydropower Unlock More Clean Energy | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOil & Gas » Methane HydrateEnergy Investments in Existing

  9. An Overview of Existing Wind Energy Ordinances | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovation in Carbon Capture and Sequestration Technology inExisting Wind

  10. Hot One-Temperature Accretion Flows Revisited

    E-Print Network [OSTI]

    Feng Yuan; Ronald E. Taam; Yongquan Xue; Wei Cui

    2005-09-11T23:59:59.000Z

    The effectiveness of the thermal coupling of ions and electrons in the context of optically thin, hot accretion flows is investigated. In the limit of complete coupling, we focus on the one-temperature accretion flows. Based on a global analysis, the results are compared with two-temperature accretion flow models and with the observations of black hole sources. Many features are quite similar. That is, hot one-temperature solutions are found to exist for mass flow rates less than a critical value; i.e., $\\dot{M}\\la 10\\alpha^2\\dot{M}_{\\rm Edd}$, where $\\dot{M}_{\\rm Edd}= L_{\\rm Edd}/c^2$ is the Eddington accretion rate. At low mass flow rates, $\\dot{M}\\la 10^{-3}\\alpha^2 \\dot{M}_{\\rm Edd}$, the solution is in the advection-dominated accretion flow (ADAF) regime. But at higher rates, radiative cooling is effective and is mainly balanced by advective {\\em heating}, placing the solution in the regime of luminous hot accretion flow (LHAF). To test the viability of the one-temperature models, we have fitted the spectra of the two black hole sources, Sgr A* and XTE J1118+480, which have been examined successfully with two-temperature models. It is found that the one-temperature models do not provide acceptable fits to the multi-wavelength spectra of Sgr A* nor to XTE J1118+480 as a result of the higher temperatures characteristic of the one-temperature models. It is concluded that the thermal coupling of ions and electrons cannot be fully effective and that a two-temperature description is required in hot accretion flow solutions.

  11. Application of convolution and average pressure approximation for solving non-linear flow problems. constant pressure inner boundary condition for gas flow

    E-Print Network [OSTI]

    Zhakupov, Mansur

    2006-08-16T23:59:59.000Z

    properties are specifically taken as implicit functions of pressure, temperature, and composition) are particularly challenging because the diffusivity equation for the "real gas" flow case is strongly non-linear. Whereas different methods exist which allow...

  12. Existence of wormholes with a barotropic equation of state

    E-Print Network [OSTI]

    Peter K. F. Kuhfittig

    2014-08-20T23:59:59.000Z

    This paper examines the effect of the linear barotropic equation of state $p=\\omega\\rho$ on the existence or theoretical construction of traversable wormholes. If either the energy density or the closely related shape function is known, then the resulting redshift function $\\Phi$ will almost always lead to an event horizon. Specifying the redshift function avoids this problem but only by relinquishing some of the control over the physics. Moving to a cosmological setting, we assume that $\\Phi$ is such that $e^{2\\Phi}=[(r+a)/b_0]^l$, $a\\ge 0$, based on the existence of galactic rotation curves. Here the wormhole structure can only be maintained if $\\omegamodel can therefore be extended to zero and negative $l$ by taking $l$ to be a convenient parameter that is not necessarily related to the tangential velocity. The main reason is that if $a=0$, then the two special cases $l=0$ and $lmodels for wormholes supported by phantom energy, while simultaneously avoiding an event horizon, thereby providing an additional motivation for the form of the redshift function. A final topic is a possible unification of these cases by means of teleparallel gravity.

  13. Gate dielectric degradation: Pre-existing vs. generated defects

    SciTech Connect (OSTI)

    Veksler, Dmitry, E-mail: Dmitry.Veksler@sematech.org, E-mail: gennadi.bersuker@sematech.org; Bersuker, Gennadi, E-mail: Dmitry.Veksler@sematech.org, E-mail: gennadi.bersuker@sematech.org [SEMATECH Inc., 257 Fuller Rd., Albany, New York 12203 (United States)

    2014-01-21T23:59:59.000Z

    We consider the possibility that degradation of the electrical characteristics of high-k gate stacks under low voltage stresses of practical interest is caused primarily by activation of pre-existing defects rather than generation of new ones. In nFETs in inversion, in particular, defect activation is suggested to be associated with the capture of an injected electron: in this charged state, defects can participate in a fast exchange of charge carriers with the carrier reservoir (substrate or gate electrode) that constitutes the physical process underlying a variety of electrical measurements. The degradation caused by the activation of pre-existing defects, as opposed to that of new defect generation, is both reversible and exhibits a tendency to saturate through the duration of stress. By using the multi-phonon assisted charge transport description, it is demonstrated that the trap activation concept allows reproducing a variety of experimental results including stress time dependency of the threshold voltage, leakage current, charge pumping current, and low frequency noise. Continuous, long-term degradation described by the power law time dependency is shown to be determined by the activation of defects located in the interfacial SiO{sub 2} layer of the high-k gate stacks. The findings of this study can direct process optimization efforts towards reduction of as-grown precursors of the charge trapping defects as the major factor affecting reliability.

  14. Surface Tension Adjustment in a Pseudo-Potential Lattice Boltzmann Model

    E-Print Network [OSTI]

    Hu, Anjie; Uddin, Rizwan

    2014-01-01T23:59:59.000Z

    Pseudo-potential lattice Boltzmann models have been widely applied in many multiphase simulations. However, most of these models still suffer from some drawbacks such as spurious velocities and untunable surface tension. In this paper, we aim to discuss the surface tension of a popular pseudo-potential model proposed by Kupershtokh et al., which has attracted much attention due to its simplicity and stability. The influence of a parameter on the surface tension in the model is analyzed. Based on the analysis, we proposed a method to adjust surface tension by changing the parameter in the model. However, the density distribution and the stability of the model also depend on the parameter. To adjust the surface tension independently, the pressure tensor modifying method is introduced and numerically tested. The simulation results show that, by applying the pressure tensor modifying method, the surface tension can be adjusted with little influence on the stability and density distributions.

  15. Analysis of SPRIHTE LOPA flow excursion tests

    SciTech Connect (OSTI)

    Laurinat, J.E.

    1993-02-01T23:59:59.000Z

    The SPRIHTE FLOPA flow excursion tests, the results of which are presented here, have been modeled using FLOPA, the assembly thermal-hydraulics limits analysis code for the LOPA. FLOPA calculations show T{sub wall} = T{sub sat} is a reliable precursor to the onset of thermal excursion at prototypic flow rates during the ECS addition phase of the LOPA. A FLOPA model was created based on nominal dimensions for the SPRIHTE rig and an assumption that the rig`s cylinders were concentrically located. This model can determine when T{sub wall} = T{sub sat} if adjustments are made to account for differences between measured and calculated subchannel flow and heat transfer rates. To make these adjustments, a multiplier {beta} was applied to the wall saturation temperature criterion (T{sub wall} = {beta} T{sub sat}, in degrees C) to match measured and calculated powers at which the saturation temperature was first exceeded at the wall. Based on preliminary test results, a multiplier of 0.878 was recommended for use in calculating LOPA limits for the K-15.1 subcycle. This multiplier provides margins of 14% to 19% between the calculated wall saturation temperature limits and the measured powers at the onset of thermal excursion. The effective margins used in the final LOPA limits, which include dimensional and heat transfer model uncertainties and biases due to eccentricities, range from 38% to 41%. It is estimated that use of the wall saturation temperature criterion lowers the K-14.1 subcycle LOPA core power limit, which is based on a Stanton number of 0.0025, from 41% to 37% of the historical full power of 2400 MW. This report describes the SPRIHTE LOPA tests, describes and evaluates the FLOPA Model for the SPRIHTE tests, discusses selection of a limit criterion for the SPRIHTE tests, and evaluates the transition between high and low flow rate criteria. Calculated results and a sample of FLOPA input for the analysis of the SPRIHTE tests are provided.

  16. Turbulent flow in graphene

    E-Print Network [OSTI]

    Kumar S. Gupta; Siddhartha Sen

    2010-06-05T23:59:59.000Z

    We demonstrate the possibility of a turbulent flow of electrons in graphene in the hydrodynamic region, by calculating the corresponding turbulent probability density function. This is used to calculate the contribution of the turbulent flow to the conductivity within a quantum Boltzmann approach. The dependence of the conductivity on the system parameters arising from the turbulent flow is very different from that due to scattering.

  17. Development of Next Generation Multiphase Pipe Flow Prediction Tools

    SciTech Connect (OSTI)

    Tulsa Fluid Flow

    2008-08-31T23:59:59.000Z

    The developments of fields in deep waters (5000 ft and more) is a common occurrence. It is inevitable that production systems will operate under multiphase flow conditions (simultaneous flow of gas-oil-and water possibly along with sand, hydrates, and waxes). Multiphase flow prediction tools are essential for every phase of the hydrocarbon recovery from design to operation. The recovery from deep-waters poses special challenges and requires accurate multiphase flow predictive tools for several applications including the design and diagnostics of the production systems, separation of phases in horizontal wells, and multiphase separation (topside, seabed or bottom-hole). It is very crucial to any multiphase separation technique that is employed either at topside, seabed or bottom-hole to know inlet conditions such as the flow rates, flow patterns, and volume fractions of gas, oil and water coming into the separation devices. The overall objective was to develop a unified model for gas-oil-water three-phase flow in wells, flow lines, and pipelines to predict the flow characteristics such as flow patterns, phase distributions, and pressure gradient encountered during petroleum production at different flow conditions (pipe diameter and inclination, fluid properties and flow rates). The project was conducted in two periods. In Period 1 (four years), gas-oil-water flow in pipes were investigated to understand the fundamental physical mechanisms describing the interaction between the gas-oil-water phases under flowing conditions, and a unified model was developed utilizing a novel modeling approach. A gas-oil-water pipe flow database including field and laboratory data was formed in Period 2 (one year). The database was utilized in model performance demonstration. Period 1 primarily consisted of the development of a unified model and software to predict the gas-oil-water flow, and experimental studies of the gas-oil-water project, including flow behavior description and closure relation development for different flow conditions. Modeling studies were performed in two parts, Technology Assessment and Model Development and Enhancement. The results of the Technology assessment study indicated that the performance of the current state of the art two-phase flow models was poor especially for three-phase pipeline flow when compared with the existing data. As part of the model development and enhancement study, a new unified model for gas-oil-water three-phase pipe flow was developed. The new model is based on the dynamics of slug flow, which shares transition boundaries with all the other flow patterns. The equations of slug flow are used not only to calculate the slug characteristics, but also to predict transitions from slug flow to other flow patterns. An experimental program including three-phase gas-oil-water horizontal flow and two-phase horizontal and inclined oil-water flow testing was conducted utilizing a Tulsa University Fluid Flow Projects Three-phase Flow Facility. The experimental results were incorporated into the unified model as they became available, and model results were used to better focus and tailor the experimental study. Finally, during the Period 2, a new three-phase databank has been developed using the data generated during this project and additional data available in the literature. The unified model to predict the gas-oil-water three phase flow characteristics was tested by comparing the prediction results with the data. The results showed good agreements.

  18. Measure Guideline: Selecting Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, R.

    2014-02-01T23:59:59.000Z

    This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

  19. On the existence of certain axisymmetric interior metrics

    SciTech Connect (OSTI)

    Angulo Santacruz, C. [Department of Mathematics, University of West Indies, Kingston 6 (Jamaica); Batic, D. [Department of Mathematics, University of West Indies, Kingston 6 (Jamaica); Departamento de Matematicas, Universidad de los Andes, Cra. 1E No. 18A-10, Bogota (Colombia); Nowakowski, M. [Departamento de Fisica, Universidad de los Andes, Cra. 1E No. 18A-10, Bogota (Colombia)

    2010-08-15T23:59:59.000Z

    One of the effects of noncommutative coordinate operators is that the delta function connected to the quantum mechanical amplitude between states sharp to the position operator gets smeared by a Gaussian distribution. Although this is not the full account of the effects of noncommutativity, this effect is, in particular, important as it removes the point singularities of Schwarzschild and Reissner-Nordstroem solutions. In this context, it seems to be of some importance to probe also into ringlike singularities which appear in the Kerr case. In particular, starting with an anisotropic energy-momentum tensor and a general axisymmetric ansatz of the metric together with an arbitrary mass distribution (e.g., Gaussian), we derive the full set of Einstein equations that the noncommutative geometry inspired Kerr solution should satisfy. Using these equations we prove two theorems regarding the existence of certain Kerr metrics inspired by noncommutative geometry.

  20. Strategy Guideline: Quality Management in Existing Homes; Cantilever Floor Example

    SciTech Connect (OSTI)

    Taggart, J.; Sikora, J.; Wiehagen, J.; Wood, A.

    2011-12-01T23:59:59.000Z

    This guideline is designed to highlight the QA process that can be applied to any residential building retrofit activity. The cantilevered floor retrofit detailed in this guideline is included only to provide an actual retrofit example to better illustrate the QA activities being presented. The goal of existing home high performing remodeling quality management systems (HPR-QMS) is to establish practices and processes that can be used throughout any remodeling project. The research presented in this document provides a comparison of a selected retrofit activity as typically done versus that same retrofit activity approached from an integrated high performance remodeling and quality management perspective. It highlights some key quality management tools and approaches that can be adopted incrementally by a high performance remodeler for this or any high performance retrofit. This example is intended as a template and establishes a methodology that can be used to develop a portfolio of high performance remodeling strategies.

  1. Existence and Regularity for Dynamic Viscoelastic Adhesive Contact with Damage

    SciTech Connect (OSTI)

    Kuttler, Kenneth L. [Department of Mathematics, Brigham Young University, Provo, UT 84602 (United States)], E-mail: klkuttler@math.byu.edu; Shillor, Meir [Department of Mathematics and Statistics, Oakland University, Rochester, MI 48309 (United States)], E-mail: shillor@oakland.edu; Fernandez, Jose R. [Departamento de Matematica Aplicada, Facultade de Matematicas, University of Santiago de Compostela, 15706 Santiago de Compostela (Spain)], E-mail: jramon@usc.es

    2006-01-15T23:59:59.000Z

    A model for the dynamic process of frictionless adhesive contact between a viscoelastic body and a reactive foundation, which takes into account the damage of the material resulting from tension or compression, is presented. Contact is described by the normal compliance condition. Material damage is modelled by the damage field, which measures the pointwise fractional decrease in the load-carrying capacity of the material, and its evolution is described by a differential inclusion. The model allows for different damage rates caused by tension or compression. The adhesion is modelled by the bonding field, which measures the fraction of active bonds on the contact surface. The existence of the unique weak solution is established using the theory of set-valued pseudomonotone operators introduced by Kuttler and Shillor (1999). Additional regularity of the solution is obtained when the problem data is more regular and satisfies appropriate compatibility conditions.

  2. Elliptic Flow: A Brief Review

    E-Print Network [OSTI]

    Raimond Snellings

    2011-06-15T23:59:59.000Z

    One of the fundamental questions in the field of subatomic physics is what happens to matter at extreme densities and temperatures as may have existed in the first microseconds after the Big Bang and exists, perhaps, in the core of dense neutron stars. The aim of heavy-ion physics is to collide nuclei at very high energies and thereby create such a state of matter in the laboratory. The experimental program started in the 1990's with collisions made available at the Brookhaven Alternating Gradient Synchrotron (AGS), the CERN Super Proton Synchrotron (SPS) and continued at the Brookhaven Relativistic Heavy-Ion Collider (RHIC) with maximum center of mass energies of 4.75, 17.2 and 200 GeV respectively. Collisions of heavy-ions at the unprecedented energy of 2.76 TeV have recently become available at the LHC collider at CERN. In this review I will give a brief introduction to the physics of ultra-relativistic heavy-ion collisions and discuss the current status of elliptic flow measurements.

  3. Microelectromechanical flow control apparatus

    DOE Patents [OSTI]

    Okandan, Murat (NE Albuquerque, NM)

    2009-06-02T23:59:59.000Z

    A microelectromechanical (MEM) flow control apparatus is disclosed which includes a fluid channel formed on a substrate from a first layer of a nonconducting material (e.g. silicon nitride). A first electrode is provided on the first layer of the nonconducting material outside the flow channel; and a second electrode is located on a second layer of the nonconducting material above the first layer. A voltage applied between the first and second electrodes deforms the fluid channel to increase its cross-sectional size and thereby increase a flow of a fluid through the channel. In certain embodiments of the present invention, the fluid flow can be decreased or stopped by applying a voltage between the first electrode and the substrate. A peristaltic pumping of the fluid through the channel is also possible when the voltage is applied in turn between a plurality of first electrodes and the substrate. A MEM flow control assembly can also be formed by providing one or more MEM flow control devices on a common substrate together with a submicron filter. The MEM flow control assembly can optionally include a plurality of pressure sensors for monitoring fluid pressure and determining flow rates through the assembly.

  4. Fluid dynamics of rivulet flow between plates W. Drenckhan, H. Ritacco, A. Saint-Jalmes, A. Saugey, P. McGuinness, A. van der Net, D. Langevin, and D.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    spaced, vertical glass plates. Such a "rivulet" is bounded by two liquid/solid and two mobile liquid/gas interfaces, posing fluid dynamic problems of direct relevance to local fluid flow in liquid foams/liquid or liquid/gas interfaces, as found in foams and emulsions, which respond to flow by adjusting their shape

  5. Modeling Credit Value Adjustment With Downgrade-Triggered Termination Clause Using A Ruin Theoretic Approach

    E-Print Network [OSTI]

    Feng, Runhuan

    . At the heart of the valuation of credit risk adjustment(CVA) is the computation of the probability of default, Laplace transform inversion, finite- time ruin probability. 1 Introduction The recent financial crisis limit. Nevertheless, numerous examples from the 2007 crisis have shown that even the high profile

  6. Reinforcement Learning to Adjust Robot Movements to New Situations MPI Tbingen, Germany

    E-Print Network [OSTI]

    , namely a kernelized version of the reward-weighted regres- sion. We show two robot applications and Peters, 2010], and even in tasks with potential industrial applications [Urbanek et al., 2004Reinforcement Learning to Adjust Robot Movements to New Situations Jens Kober MPI Tübingen, Germany

  7. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Altitude-Adjusted Corrected Geomagnetic Coordinates

    E-Print Network [OSTI]

    Shepherd, Simon

    ]; and satellite measurements of particles and electric currents to determine magnetospheric boundaries and large Geomagnetic Coordinates: Definition and Functional Approximations S. G. Shepherd Thayer School of Engineering to transform between geo- graphic and Altitude-Adjusted Corrected Geomagnetic (AACGM) coordinates reveals

  8. A Nonparametric Matching Method for Covariate Adjustment with Application to Economic Evaluation

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    A Nonparametric Matching Method for Covariate Adjustment with Application to Economic Evaluation of propensity score and Mahalanobis distance matching. We apply Genetic Matching to an economic evaluation and nonparametric methods; observational stud- ies; health economic evaluation #12;1 Introduction Progress has been

  9. Faraday cup with nanosecond response and adjustable impedance for fast electron beam characterization

    SciTech Connect (OSTI)

    Hu Jing; Rovey, Joshua L. [Missouri University of Science and Technology (Formerly University of Missouri-Rolla), Rolla, Missouri 65409 (United States)

    2011-07-15T23:59:59.000Z

    A movable Faraday cup design with simple structure and adjustable impedance is described in this work. This Faraday cup has external adjustable shunt resistance for self-biased measurement setup and 50 {Omega} characteristic impedance to match with 50 {Omega} standard BNC coaxial cable and vacuum feedthroughs for nanosecond-level pulse signal measurements. Adjustable shunt resistance allows self-biased measurements to be quickly acquired to determine the electron energy distribution function. The performance of the Faraday cup is validated by tests of response time and amplitude of output signal. When compared with a reference source, the percent difference of the Faraday cup signal fall time is less than 10% for fall times greater than 10 ns. The percent difference of the Faraday cup signal pulse width is below 6.7% for pulse widths greater than 10 ns. A pseudospark-generated electron beam is used to compare the amplitude of the Faraday cup signal with a calibrated F-70 commercial current transformer. The error of the Faraday cup output amplitude is below 10% for the 4-14 kV tested pseudospark voltages. The main benefit of this Faraday cup is demonstrated by adjusting the external shunt resistance and performing the self-biased method for obtaining the electron energy distribution function. Results from a 4 kV pseudospark discharge indicate a ''double-humped'' energy distribution.

  10. Economics Department Working Paper Series Border Carbon Adjustments and the Potential for

    E-Print Network [OSTI]

    Sussex, University of

    in major emerging economies ­ especially India and China ­ with consequent carbon leakage2 . UnderEconomics Department Working Paper Series No. 6-2010 Border Carbon Adjustments and the Potential.holmes@sussex.ac.uk j.rollo@sussex.ac.uk Abstract: Balancing legitimate fears that carbon leakage could undermine

  11. Consumption-Based Adjustment of China's Emissions-Intensity Targets: An

    E-Print Network [OSTI]

    China's Twelfth Five-Year Plan (2011­2015) aims to achieve a national carbon intensity reduction of 17's provinces is complicated by the fact that more than half of China's national carbon emissions are embodiedConsumption-Based Adjustment of China's Emissions-Intensity Targets: An Analysis of its Potential

  12. Generalized 3-D Tolerance Analysis of Mechanical Assemblies with Small Kinematic Adjustments

    E-Print Network [OSTI]

    ) for tolerance analysis of 3-D mechanical assemblies is presented. Vector assembly models are used, based on 3-D. Tolerance analysis procedures are formulated for both open and closed loop assembly models. The method generalizes assembly variation models to include small kinematic adjustments between mating parts. Open vector

  13. Life-Add: Lifetime Adjustable Design for WiFi Networks with Heterogeneous Energy Supplies

    E-Print Network [OSTI]

    Sinha, Prasun

    Life-Add: Lifetime Adjustable Design for WiFi Networks with Heterogeneous Energy Supplies Shengbo Chen§, Tarun Bansal§, Yin Sun§, Prasun Sinha and Ness B. Shroff Department of ECE, The Ohio State University Department of CSE, The Ohio State University Email: {chens,shroff}@ece.osu.edu, {bansal,prasun}@cse.ohio

  14. A Gain-adjusted Fuzzy PI/PD Adaptive Controller based on the Accumulated Genetic Algorithm

    E-Print Network [OSTI]

    Chou, Chien-Hsing (Ister)

    for each cycle and future regulates the parameter of controller by two factors or functions. In addition, the controller signal is fed back to the adaptive mechanism [15] and [16]. Then, the regulated functions on a fuzzy reasoning is designed to adjust the output range of a controller in [17]. The ideal structure

  15. A uniform price auction with locational price adjustments for competitive electricity markets

    E-Print Network [OSTI]

    b School of Electrical Engineering, Phillips Hall, Cornell University, Ithaca, NY 14853, USA cA uniform price auction with locational price adjustments for competitive electricity markets of Agricultural, Resource and Managerial Economics (ARME), Warren Hall, Cornell University, Ithaca, NY 14853, USA

  16. ADJUSTING TO NATURAL DISASTERS Smith, V., Carbone, J., Hallstrom, D., Pope, J. & Darden, M.

    E-Print Network [OSTI]

    Wang, Hai

    the largest U.S. natural disaster on record, Hurricane Andrew, to evaluate how people and housing markets Hurricane Andrew, the largest U.S. natural disaster on record, to investigate two questions.1 We first most of the differences in demographic groups' patterns of adjustment to the hurricane damage. Low

  17. The Adjustment of Avian Metabolic Rates and Water Fluxes to Desert Environments

    E-Print Network [OSTI]

    Williams, Jos. B.

    ambient air temperatures (Ta), low primary productivity, and lack of surface water place deserts among and Seely 1982; Williams and Tieleman 2000b). Likewise, lack of surface water ostensibly limits water intake461 The Adjustment of Avian Metabolic Rates and Water Fluxes to Desert Environments B. Irene

  18. Hydraulic adjustment of Scots pine across Europe J. Martnez-Vilalta1,2

    E-Print Network [OSTI]

    Mencuccini, Maurizio

    Research Hydraulic adjustment of Scots pine across Europe J. Martínez-Vilalta1,2 , H. Cochard3), 8903 Birmensdorf, Switzerland Summary · The variability of branch-level hydraulic properties, xylem anatomy, sapwood- and leaf-specific hydraulic conductivity (KS and KL), vulnerability to embolism

  19. Adjusting for selection bias in Web surveys using propensity scores: the case of the Health

    E-Print Network [OSTI]

    Schonlau, Matt

    Adjusting for selection bias in Web surveys using propensity scores: the case of the Health at the Joint Statistical Meetings, Toronto, August 2004. Abstract Many web surveys allow respondents to self as supplementary information about which subset of HRS respondents also responded to an additional web survey (web

  20. Development of the Flux-Adjusting Surface Data Assimilation System for Mesoscale Models

    E-Print Network [OSTI]

    Niyogi, Dev

    Development of the Flux-Adjusting Surface Data Assimilation System for Mesoscale Models KIRAN and temperature and for surface air temperature and water vapor mixing ratio for mesoscale models. In the FASDAS-field variables. The FASDAS is coupled to a land surface submodel in a three-dimensional mesoscale model and tests

  1. The Adjustable Grid: A Grid-Based Cursor Control Solution using Speech Recognition

    E-Print Network [OSTI]

    Gray, Jeffrey G.

    The Adjustable Grid: A Grid-Based Cursor Control Solution using Speech Recognition Tarif Haque1 of grid-based cursor control systems using speech recognition have been developed. These systems typically overlay a numbered 3x3 grid on the screen and allow the user to recursively drill the cursor down

  2. Electrically heated particulate filter with zoned exhaust flow control

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2012-06-26T23:59:59.000Z

    A system includes a particulate matter (PM) filter that includes X zones. An electrical heater includes Y heater segments that are associated with respective ones of the X zones. The electrical heater is arranged upstream from and proximate with the PM filter. A valve assembly includes Z sections that are associated with respective ones of the X zones. A control module adjusts flow through each of the Z sections during regeneration of the PM filter via control of the valve assembly. X, Y and Z are integers.

  3. Friction and the oscillatory motion of granular flows

    E-Print Network [OSTI]

    Lydie Staron

    2012-11-26T23:59:59.000Z

    This contribution reports on numerical simulations of 2D granular flows on erodible beds. The broad aim is to investigate whether simple flows of model granular matter exhibits spontaneous oscillatory motion in generic flow conditions, and in this case, whether the frictional properties of the contacts between grains may affect the existence or the characteristics of this oscillatory motion. The analysis of different series of simulations show that the flow develops an oscillatory motion with a well-defined frequency which increases like the inverse of the velocity's square root. We show that the oscillation is essentially a surface phenomena. The amplitude of the oscillation is higher for lower volume fractions, and can thus be related to the flow velocity and grains friction properties. The study of the influence of the periodic geometry of the simulation cell shows no significant effect. These results are discussed in relation to sonic sands.

  4. NEAR THE BOUNDARY OF THE HELIOSPHERE: A FLOW TRANSITION REGION

    SciTech Connect (OSTI)

    Opher, M. [Astronomy Department, Boston University, 725 Commonwealth Avenue, Boston, MA (United States); Drake, J. F. [Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD (United States); Velli, M. [Jet Propulsion Laboratory, Pasadena, CA (United States); Decker, R. B. [Applied Physics Laboratory, Johns Hopkins University, Laurel, MD (United States); Toth, G., E-mail: mopher@bu.edu [Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI (United States)

    2012-06-01T23:59:59.000Z

    Since April of 2010, Voyager 1 has been immersed in a region of near zero radial flows, where the solar wind seems to have stopped. The existence of this region contradicts current models that predict that the radial flows will go to zero only at the heliopause. These models, however, do not include the sector region (or include it in a kinematic fashion), where the solar magnetic field periodically reverses polarity. Here we show that the presence of the sector region in the heliosheath, where reconnection occurs, fundamentally alters the flows, giving rise to a Flow Transition Region (FTR), where the flow abruptly turns and the radial velocity becomes near zero or negative. We estimate, based on a simulation, that at the Voyager 1 location, the thickness of the FTR is around 7-11 AU.

  5. Genealogy of flows of continuous-state branching processes via flows of partitions and the Eve property

    E-Print Network [OSTI]

    Labbé, Cyril

    2012-01-01T23:59:59.000Z

    We encode the genealogy of a continuous-state branching process associated with a branching mechanism $\\Psi$ - or $\\Psi$-CSBP in short - using a stochastic flow of partitions. This encoding holds for all branching mechanisms and appears as a very tractable object to deal with asymptotic behaviours and convergences. In particular we study the so-called Eve property - the existence of an ancestor from which the entire population descends asymptotically - and give a necessary and sufficient condition on the $\\Psi$-CSBP for this property to hold. Finally, we show that the flow of partitions unifies the lookdown representation and the flow of subordinators when the Eve property holds.

  6. High Btu gas from peat. Existing social and economic conditions

    SciTech Connect (OSTI)

    Not Available

    1981-08-01T23:59:59.000Z

    In 1980, the Minnesota Gas Company (Minnegasco) submitted a proposal to the US Department of Energy entitled, A Feasibility Study - High Btu Gas from Peat. The proposed study was designed to assess the overall viability of the design, construction and operation of a commercial facility for the production of high-Btu substitute natural gas (SNG) from Minnesota peat. On September 30, 1980, Minnegasco was awarded a grant by the Department of Energy to perform the proposed study. In order to complete the study, Minnegasco assembled an experienced project team with the wide range of expertise required. In addition, the State of Minnesota agreed to participate in an advisory capacity. The items to be investigated by the project team during the feasibility study include peat harvesting, dewatering, gasification process design, economic and risk assessment, site evaluation, environmental and socioeconomic impact assessment. Ertec (The Earth Technology Corporation) was selected to conduct the site evaluation and environmental assessment portions of the feasibility study. The site evaluation was completed in March of 1981 with the submittal of the first of several reports to Minnegasco. This report describes the existing social and economic conditions of the proposed project area in northern Minnesota. The baseline data presented will be used to assess the significance of potential project impacts in subsequent phases of the feasibility study. Wherever possible, the data base was established using 1980 Bureau of Census statistics. However, where the 1980 data were not yet available, the most recent information is presented. 11 figures, 46 tables.

  7. Methodology and Process for Condition Assessment at Existing Hydropower Plants

    SciTech Connect (OSTI)

    Zhang, Qin Fen [ORNL] [ORNL; Smith, Brennan T [ORNL] [ORNL; Cones, Marvin [Mesa Associates, Inc.] [Mesa Associates, Inc.; March, Patrick [Hydro Performance Processes, Inc.] [Hydro Performance Processes, Inc.; Dham, Rajesh [U.S. Department of Energy] [U.S. Department of Energy; Spray, Michael [New West Technologies, LLC.] [New West Technologies, LLC.

    2012-01-01T23:59:59.000Z

    Hydropower Advancement Project was initiated by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy to develop and implement a systematic process with a standard methodology to identify the opportunities of performance improvement at existing hydropower facilities and to predict and trend the overall condition and improvement opportunity within the U.S. hydropower fleet. The concept of performance for the HAP focuses on water use efficiency how well a plant or individual unit converts potential energy to electrical energy over a long-term averaging period of a year or more. The performance improvement involves not only optimization of plant dispatch and scheduling but also enhancement of efficiency and availability through advanced technology and asset upgrades, and thus requires inspection and condition assessment for equipment, control system, and other generating assets. This paper discusses the standard methodology and process for condition assessment of approximately 50 nationwide facilities, including sampling techniques to ensure valid expansion of the 50 assessment results to the entire hydropower fleet. The application and refining process and the results from three demonstration assessments are also presented in this paper.

  8. Momentum and mass transport by coherent structures in a shallow vegetated shear flow

    E-Print Network [OSTI]

    White, Brian L., 1975-

    2006-01-01T23:59:59.000Z

    In many aquatic systems, from tidal creeks with fringing mangroves to rivers and associated floodplains, there exists an interface between dense vegetation and a high conveyance channel. A shear flow develops across this ...

  9. Magnetically stimulated fluid flow patterns

    ScienceCinema (OSTI)

    Martin, Jim; Solis, Kyle

    2014-08-06T23:59:59.000Z

    Sandia National Laboratories' Jim Martin and Kyle Solis explain research on the effects of magnetic fields on fluid flows and how they stimulate vigorous flows. Fluid flow is a necessary phenomenon in everything from reactors to cooling engines in cars.

  10. Magnetically stimulated fluid flow patterns

    SciTech Connect (OSTI)

    Martin, Jim; Solis, Kyle

    2014-03-06T23:59:59.000Z

    Sandia National Laboratories' Jim Martin and Kyle Solis explain research on the effects of magnetic fields on fluid flows and how they stimulate vigorous flows. Fluid flow is a necessary phenomenon in everything from reactors to cooling engines in cars.

  11. Distributed Power Flow Control: Distributed Power Flow Control using Smart Wires for Energy Routing

    SciTech Connect (OSTI)

    None

    2012-04-24T23:59:59.000Z

    GENI Project: Smart Wire Grid is developing a solution for controlling power flow within the electric grid to better manage unused and overall transmission capacity. The 300,000 miles of high-voltage transmission line in the U.S. today are congested and inefficient, with only around 50% of all transmission capacity utilized at any given time. Increased consumer demand should be met in part with more efficient and an economical power flow. Smart Wire Grid’s devices clamp onto existing transmission lines and control the flow of power within—much like how internet routers help allocate bandwidth throughout the web. Smart wires could support greater use of renewable energy by providing more consistent control over how that energy is routed within the grid on a real-time basis. This would lessen the concerns surrounding the grid’s inability to effectively store intermittent energy from renewables for later use.

  12. Flow visualization using momentum and energy transport tubes and applications to turbulent flow in wind farms

    E-Print Network [OSTI]

    Meyers, Johan

    2012-01-01T23:59:59.000Z

    As a generalization of the mass-flux based classical stream-tube, the concept of momentum and energy transport tubes is discussed as a flow visualization tool. These transport tubes have the property, respectively, that no fluxes of momentum or energy exist over their respective tube mantles. As an example application using data from large-eddy simulation, such tubes are visualized for the mean-flow structure of turbulent flow in large wind farms, in fully developed wind-turbine-array boundary layers. The three-dimensional organization of energy transport tubes changes considerably when turbine spacings are varied, enabling the visualization of the path taken by the kinetic energy flux that is ultimately available at any given turbine within the array.

  13. Adapting and calibration of existing wake models to meet the conditions inside offshore wind farms. Page 1 Adapting and calibration of existing wake models

    E-Print Network [OSTI]

    Adapting and calibration of existing wake models to meet the conditions inside offshore wind farms@emd.dk #12;Adapting and calibration of existing wake models to meet the conditions inside offshore wind farms inside offshore wind farms" has as purpose to improve the existing PARK models for calculating the wake

  14. Water vulnerabilities for existing coal-fired power plants.

    SciTech Connect (OSTI)

    Elcock, D.; Kuiper, J.; Environmental Science Division

    2010-08-19T23:59:59.000Z

    This report was funded by the U.S. Department of Energy's (DOE's) National Energy Technology Laboratory (NETL) Existing Plants Research Program, which has an energy-water research effort that focuses on water use at power plants. This study complements the Existing Plants Research Program's overall research effort by evaluating water issues that could impact power plants. Water consumption by all users in the United States over the 2005-2030 time period is projected to increase by about 7% (from about 108 billion gallons per day [bgd] to about 115 bgd) (Elcock 2010). By contrast, water consumption by coal-fired power plants over this period is projected to increase by about 21% (from about 2.4 to about 2.9 bgd) (NETL 2009b). The high projected demand for water by power plants, which is expected to increase even further as carbon-capture equipment is installed, combined with decreasing freshwater supplies in many areas, suggests that certain coal-fired plants may be particularly vulnerable to potential water demand-supply conflicts. If not addressed, these conflicts could limit power generation and lead to power disruptions or increased consumer costs. The identification of existing coal-fired plants that are vulnerable to water demand and supply concerns, along with an analysis of information about their cooling systems and related characteristics, provides information to help focus future research and development (R&D) efforts to help ensure that coal-fired generation demands are met in a cost-effective manner that supports sustainable water use. This study identified coal-fired power plants that are considered vulnerable to water demand and supply issues by using a geographical information system (GIS) that facilitated the analysis of plant-specific data for more than 500 plants in the NETL's Coal Power Plant Database (CPPDB) (NETL 2007a) simultaneously with 18 indicators of water demand and supply. Two types of demand indicators were evaluated. The first type consisted of geographical areas where specific conditions can generate demand vulnerabilities. These conditions include high projected future water consumption by thermoelectric power plants, high projected future water consumption by all users, high rates of water withdrawal per square mile (mi{sup 2}), high projected population increases, and areas projected to be in a water crisis or conflict by 2025. The second type of demand indicator was plant specific. These indicators were developed for each plant and include annual water consumption and withdrawal rates and intensities, net annual power generation, and carbon dioxide (CO{sub 2}) emissions. The supply indictors, which are also area based, include areas with low precipitation, high temperatures, low streamflow, and drought. The indicator data, which were in various formats (e.g., maps, tables, raw numbers) were converted to a GIS format and stored, along with the individual plant data from the CPPDB, in a single GIS database. The GIS database allowed the indicator data and plant data to be analyzed and visualized in any combination. To determine the extent to which a plant would be considered 'vulnerable' to a given demand or supply concern (i.e., that the plant's operations could be affected by water shortages represented by a potential demand or supply indicator), criteria were developed to categorize vulnerability according to one of three types: major, moderate, or not vulnerable. Plants with at least two major demand indicator values and/or at least four moderate demand indicator values were considered vulnerable to demand concerns. By using this approach, 144 plants were identified as being subject to demand concerns only. Plants with at least one major supply indicator value and/or at least two moderate supply indicator values were considered vulnerable to supply concerns. By using this approach, 64 plants were identified as being subject to supply concerns only. In addition, 139 plants were identified as subject to both demand and supply concerns. Therefore, a total of 347 plants were considere

  15. Building America Whole-House Solutions for New and Existing Homes...

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

    and Existing Homes: Evaluating Energy Savings in All-Electric Public Housing in the Pacific Northwest (Fact sheet) Building America Whole-House Solutions for New and Existing...

  16. TECHNOLOGIES TO ENHANCE OPERATION OF THE EXISTING NATURAL GAS COMPRESSION INFRASTRUCTURE

    SciTech Connect (OSTI)

    Anthony J. Smalley; Ralph E. Harris; Gary D. Bourn; Danny M. Deffenbaugh

    2005-01-01T23:59:59.000Z

    This quarterly report documents work performed under Tasks 10 through 14 of the project entitled: ''Technologies to Enhance Operation of the Existing Natural Gas Compression Infrastructure''. The project objective is to develop and substantiate methods for operating integral engine/compressors in gas pipeline service, which reduce fuel consumption, increase capacity, and enhance mechanical integrity. The report first documents tests performed on a KVG103 engine/compressor installed at Duke's Thomaston Compressor Station. This is the first series of tests performed on a four-stroke engine under this program. Additionally, this report presents results, which complete a comparison of performance before and after modification to install High Pressure Fuel Injection and a Turbocharger on a GMW10 at Williams Station 60. Quarterly Reports 7 and 8 already presented detailed data from tests before and after this modification, but the final quantitative comparison required some further analysis, which is presented in Section 5 of this report. The report further presents results of detailed geometrical measurements and flow bench testing performed on the cylinders and manifolds of the Laboratory Cooper GMVH6 engine being employed for two-stroke engine air balance investigations. These measurements are required to enhance the detailed accuracy in modeling the dynamic interaction of air manifold, exhaust manifold, and in-cylinder fuel-air balance.

  17. A Simple test for the existence of two accretion modes in active galactic nuclei

    SciTech Connect (OSTI)

    Jester, Sebastian; /Fermilab

    2005-02-01T23:59:59.000Z

    By analogy to the different accretion states observed in black-hole X-ray binaries (BHXBs), it appears plausible that accretion disks in active galactic nuclei (AGN) undergo a state transition between a radiatively efficient and inefficient accretion flow. If the radiative efficiency changes at some critical accretion rate, there will be a change in the distribution of black hole masses and bolometric luminosities at the corresponding transition luminosity. To test this prediction, the author considers the joint distribution of AGN black hole masses and bolometric luminosities for a sample taken from the literature. The small number of objects with low Eddington-scaled accretion rates m < 0.01 and black hole masses M{sub BH} < 10{sup 9} M{sub {circle_dot}} constitutes tentative evidence for the existence of such a transition in AGN. Selection effects, in particular those associated with flux-limited samples, systematically exclude objects in particular regions of the (M{sub BH}, L{sub bol}) plane. Therefore, they require particular attention in the analysis of distributions of black hole mass, bolometric luminosity, and derived quantities like the accretion rate. The author suggests further observational tests of the BHXB-AGN unification scheme which are based on the jet domination of the energy output of BHXBs in the hard state, and on the possible equivalence of BHXB in the very high (or steep power-law) state showing ejections and efficiently accreting quasars and radio galaxies with powerful radio jets.

  18. Experimental on two sensors combination used in horizontal pipe gas-water two-phase flow

    SciTech Connect (OSTI)

    Wu, Hao; Dong, Feng [Tianjin Key Laboratory of Process Measurement and Control, School of Electrical Engineering and Automation, Tianjin University, Tianjin (China)

    2014-04-11T23:59:59.000Z

    Gas-water two phase flow phenomenon widely exists in production and living and the measurement of it is meaningful. A new type of long-waist cone flow sensor has been designed to measure two-phase mass flow rate. Six rings structure of conductance probe is used to measure volume fraction and axial velocity. The calibration of them have been made. Two sensors have been combined in horizontal pipeline experiment to measure two-phase flow mass flow rate. Several model of gas-water two-phase flow has been discussed. The calculation errors of total mass flow rate measurement is less than 5% based on the revised homogeneous flow model.

  19. Theoretical and experimental studies of churn flow in vertical tubes. Final technical report

    SciTech Connect (OSTI)

    Not Available

    1986-01-27T23:59:59.000Z

    The pattern known as churn flow is a highly unsteady pattern with stochastic features and is extremely complex. However, calculations show that for many geothermal wells the condition of churn flow consists over much of the length of the two phase zone. Furthermore, it frequently exists at the surface so that design of separation equipment and surface piping depends on the accurate modelling of this type of flow. It has been the long term purpose of this project to develop physically based models for churn flow which can be used as a basis for predicting holdup, frictional loss and heat transfer rates for this flow pattern in geothermal systems. To achieve this end, it was necessary to develop new methods for measuring the time dependent characteristics of the flow and thus be able to uncover the basic physics of the flow. Models can then be developed based on this understanding which characterizes the flow and equations for holdup, friction and heat transfer evolved.

  20. Adjustment of the Remote Tropical Climate to El Nio Conditions BENJAMIN R. LINTNER* AND JOHN C. H. CHIANG

    E-Print Network [OSTI]

    Lintner, Benjamin Richard

    convective heating anomalies that in turn cause remote tropical changes through a suite of tele- connectedAdjustment of the Remote Tropical Climate to El Niño Conditions BENJAMIN R. LINTNER* AND JOHN C. H) ABSTRACT The adjustment of the tropical climate outside the Pacific (the "remote Tropics") to the abrupt

  1. Parallel flow diffusion battery

    DOE Patents [OSTI]

    Yeh, H.C.; Cheng, Y.S.

    1984-01-01T23:59:59.000Z

    A parallel flow diffusion battery for determining the mass distribution of an aerosol has a plurality of diffusion cells mounted in parallel to an aerosol stream, each diffusion cell including a stack of mesh wire screens of different density.

  2. Optical flow switching

    E-Print Network [OSTI]

    Chan, Vincent W. S.

    Present-day networks are being challenged by dramatic increases in bandwidth demand of emerging applications. We will explore a new transport, ldquooptical flow switchingrdquo, that will enable significant growth and ...

  3. Olefin Autoxidation in Flow

    E-Print Network [OSTI]

    Neuenschwander, Ulrich

    Handling hazardous multiphase reactions in flow brings not only safety advantages but also significantly improved performance, due to better mass transfer characteristics. In this paper, we present a continuous microreactor ...

  4. A Holistic Framework for Environmental Flows Determination in Hydropower Contexts

    SciTech Connect (OSTI)

    McManamay, Ryan A [ORNL; Bevelhimer, Mark S [ORNL

    2013-05-01T23:59:59.000Z

    Among the ecological science community, the consensus view is that the natural flow regime sustains the ecological integrity of river systems. This prevailing viewpoint by many environmental stakeholders has progressively led to increased pressure on hydropower dam owners to change plant operations to affect downstream river flows with the intention of providing better conditions for aquatic biological communities. Identifying the neccessary magnitude, frequency, duration, timing, or rate of change of stream flows to meet ecological needs in a hydropower context is challenging because the ecological responses to changes in flows may not be fully known, there are usually a multitude of competing users of flow, and implementing environmental flows usually comes at a price to energy production. Realistically, hydropower managers must develop a reduced set of goals that provide the most benefit to the identified ecological needs. As a part of the Department of Energy (DOE) Water Power Program, the Instream Flow Project (IFP) was carried out by Oak Ridge National Laboratory (ORNL), Pacific Northwest National Laboratory (PNNL), and Argon National Laboratory (ANL) as an attempt to develop tools aimed at defining environmental flow needs for hydropower operations. The application of these tools ranges from national to site-specific scales; thus, the utility of each tool will depend on various phases of the environmental flow process. Given the complexity and sheer volume of applications used to determine environmentally acceptable flows for hydropower, a framework is needed to organize efforts into a staged process dependent upon spatial, temporal, and functional attributes. By far, the predominant domain for determining environmental flows related to hydropower is within the Federal Energy Regulatory Commission (FERC) relicensing process. This process can take multiple years and can be very expensive depending on the scale of each hydropower project. The utility of such a framework is that it can expedite the environmental flow process by 1) organizing data and applications to identify predictable relationships between flows and ecology, and 2) suggesting when and where tools should be used in the environmental flow process. In addition to regulatory procedures, a framework should also provide the coordination for a comprehensive research agenda to guide the science of environmental flows. This research program has further reaching benefits than just environmental flow determination by providing modeling applications, data, and geospatial layers to inform potential hydropower development. We address several objectives within this document that highlight the limitations of existing environmental flow paradigms and their applications to hydropower while presenting a new framework catered towards hydropower needs. Herein, we address the following objectives: 1) Provide a brief overview of the Natural Flow Regime paradigm and existing environmental flow frameworks that have been used to determine ecologically sensitive stream flows for hydropower operations. 2) Describe a new conceptual framework to aid in determining flows needed to meet ecological objectives with regard to hydropower operations. The framework is centralized around determining predictable relationships between flow and ecological responses. 3) Provide evidence of how efforts from ORNL, PNNL, and ANL have filled some of the gaps in this broader framework, and suggest how the framework can be used to set the stage for a research agenda for environmental flow.

  5. Feasibility Study of Hydrogen Production at Existing Nuclear Power Plants

    SciTech Connect (OSTI)

    Stephen Schey

    2009-07-01T23:59:59.000Z

    Cooperative Agreement DE-FC07-06ID14788 was executed between the U.S. Department of Energy, Electric Transportation Applications, and Idaho National Laboratory to investigate the economics of producing hydrogen by electrolysis using electricity generated by nuclear power. The work under this agreement is divided into the following four tasks: Task 1 – Produce Data and Analyses Task 2 – Economic Analysis of Large-Scale Alkaline Electrolysis Task 3 – Commercial-Scale Hydrogen Production Task 4 – Disseminate Data and Analyses. Reports exist on the prospect that utility companies may benefit from having the option to produce electricity or produce hydrogen, depending on market conditions for both. This study advances that discussion in the affirmative by providing data and suggesting further areas of study. While some reports have identified issues related to licensing hydrogen plants with nuclear plants, this study provides more specifics and could be a resource guide for further study and clarifications. At the same time, this report identifies other area of risks and uncertainties associated with hydrogen production on this scale. Suggestions for further study in some of these topics, including water availability, are included in the report. The goals and objectives of the original project description have been met. Lack of industry design for proton exchange membrane electrolysis hydrogen production facilities of this magnitude was a roadblock for a significant period. However, recent design breakthroughs have made costing this facility much more accurate. In fact, the new design information on proton exchange membrane electrolyzers scaled to the 1 kg of hydrogen per second electrolyzer reduced the model costs from $500 to $100 million. Task 1 was delayed when the original electrolyzer failed at the end of its economic life. However, additional valuable information was obtained when the new electrolyzer was installed. Products developed during this study include a process model and a N2H2 economic assessment model (both developed by the Idaho National Laboratory). Both models are described in this report. The N2H2 model closely tracked and provided similar results as the H2A model and was instrumental in assessing the effects of plant availability on price when operated in the shoulder mode for electrical pricing. Differences between the H2A and N2H2 model are included in this report.

  6. Pollution Attacks and Defenses in Wireless Inter-flow Network Coding Systems

    E-Print Network [OSTI]

    Curtmola, Reza

    1 Pollution Attacks and Defenses in Wireless Inter-flow Network Coding Systems Jing Dong, Reza Abstract--We study data pollution attacks in wireless inter-flow network coding systems. Although several the existing systems, and use it to analyze the impact of pollution attacks. Our analysis shows

  7. Mechanical analysis of a cross flow filter

    SciTech Connect (OSTI)

    Alvin, M.A.; Lippert, T.E.; Attaar, M.H.; McNerney, K.R.

    1992-12-01T23:59:59.000Z

    Material properties have also been generated at the Argonne National Laboratories which detail the fracture toughness, Weibull modulus, and critical flaw size for a specifically fabricated lot of P-100A alumina/mullite cross flow filters.(Singh, 1990) The critical flaw size within the P-100A matrix was estimated to be {approximately}500 {mu},m which includes both large interconnected pores, as well as potentially debonded areas along the mid-rib or gas channel seams. Critical flaws are generally considered as potential failure initiation sites within the ceramic matrix. In addition maximum filter element stress levels induced by the process system have been estimated at ANL through the use of finite element computer analyses. These efforts project that the highest stresses result within the flange region of the cross flow filter. As a result of these projections, efforts at Coors Ceramics were directed to improving the overall strength of the alumina/mullite material which is used for cross flow filter fabrication. The results of the efforts at Coors Ceramics provide a significant improvement in the hot strength of the P-100A alumina/mullite filter matrix. Westinghouse assessed the existing nondestructive evaluation (NDE) techniques in terms of identifying methods for detecting critical flaws within the cross flow filter body. To date viable, cost effective methods for detecting critical flaws within the P-100A alumina/mullite matrix, or along the mid-rib bonds or gas channel seams in the full-scale, porous ceramic cross flow filter element are not readily available. As an alternate approach, Westinghouse focused its attention on developing NDE techniques as inspection methods for evaluating the extent of bonding along the mid-rib bonds and gas channel seams which results during the various fabrication stages of the cross flow filter element.

  8. Mechanical analysis of a cross flow filter

    SciTech Connect (OSTI)

    Alvin, M.A.; Lippert, T.E.; Attaar, M.H.; McNerney, K.R.

    1992-01-01T23:59:59.000Z

    Material properties have also been generated at the Argonne National Laboratories which detail the fracture toughness, Weibull modulus, and critical flaw size for a specifically fabricated lot of P-100A alumina/mullite cross flow filters.(Singh, 1990) The critical flaw size within the P-100A matrix was estimated to be [approximately]500 [mu],m which includes both large interconnected pores, as well as potentially debonded areas along the mid-rib or gas channel seams. Critical flaws are generally considered as potential failure initiation sites within the ceramic matrix. In addition maximum filter element stress levels induced by the process system have been estimated at ANL through the use of finite element computer analyses. These efforts project that the highest stresses result within the flange region of the cross flow filter. As a result of these projections, efforts at Coors Ceramics were directed to improving the overall strength of the alumina/mullite material which is used for cross flow filter fabrication. The results of the efforts at Coors Ceramics provide a significant improvement in the hot strength of the P-100A alumina/mullite filter matrix. Westinghouse assessed the existing nondestructive evaluation (NDE) techniques in terms of identifying methods for detecting critical flaws within the cross flow filter body. To date viable, cost effective methods for detecting critical flaws within the P-100A alumina/mullite matrix, or along the mid-rib bonds or gas channel seams in the full-scale, porous ceramic cross flow filter element are not readily available. As an alternate approach, Westinghouse focused its attention on developing NDE techniques as inspection methods for evaluating the extent of bonding along the mid-rib bonds and gas channel seams which results during the various fabrication stages of the cross flow filter element.

  9. Conjugate flow action functionals

    SciTech Connect (OSTI)

    Venturi, Daniele, E-mail: daniele-venturi@brown.edu [Division of Applied Mathematics, Brown University, Rhode Island 02912 (United States)] [Division of Applied Mathematics, Brown University, Rhode Island 02912 (United States)

    2013-11-15T23:59:59.000Z

    We present a new general framework to construct an action functional for a non-potential field theory. The key idea relies on representing the governing equations relative to a diffeomorphic flow of curvilinear coordinates which is assumed to be functionally dependent on the solution field. Such flow, which will be called the conjugate flow, evolves in space and time similarly to a physical fluid flow of classical mechanics and it can be selected in order to symmetrize the Gâteaux derivative of the field equations with respect to suitable local bilinear forms. This is equivalent to requiring that the governing equations of the field theory can be derived from a principle of stationary action on a Lie group manifold. By using a general operator framework, we obtain the determining equations of such manifold and the corresponding conjugate flow action functional. In particular, we study scalar and vector field theories governed by second-order nonlinear partial differential equations. The identification of transformation groups leaving the conjugate flow action functional invariant could lead to the discovery of new conservation laws in fluid dynamics and other disciplines.

  10. Section 13: Flow control 1 Section 13: Flow control

    E-Print Network [OSTI]

    Kohlenbach, Ulrich

    Geometries for Energyefficient Flow Around Bodies Abstract 14:30 ­ 14:50: Elfriede Friedmann (Universität

  11. Model 923-B Mouse Gas Anesthesia Head Holder Adaptor Adjustment Features

    E-Print Network [OSTI]

    Kleinfeld, David

    Model 923-B Mouse Gas Anesthesia Head Holder Adaptor Adjustment Features Dorsal/Ventral dial.352.3139 Toll Free: 1.877.352.3275 ^^ci&ion Q)e&i^n^^^r ^esea/H^/i Model 923-B Mouse Gas Anesthesia Head Holder 923B-1/07 #12;MODEL 923-B MOUSE GAS ANESTHESIA HEAD HOLDER The KOPF Mouse Gas Anesthesia Head Holder

  12. Information Basic to Farm Adjustments in the High Plains Cotton Area of Texas.

    E-Print Network [OSTI]

    Thibodeaux, B. H. (Ben Hur); Bonnen, C. A. (Clarence Alfred); Magee, A. C. (Aden Combs)

    1944-01-01T23:59:59.000Z

    Division of Farm and Ranch Economics in Cooperation with Bureau of Agricultural Economics U. S. Department of Agriculture TEXAS AGRICULTURAL EXPERIMENT STATION A. B. CONNER, Director College Station, Texas BULLETIN NO. 652 JULY 1944... INFORMATION BASIC TO FARM ADJUSTMENTS IN THE HIGH PLAINS COTTON AREA OF TEXAS A. C. MAGEE, C. A. BONNEN, and B. H. THIBODEAUX AGRICULTURAL AND MECHANICAL COLLEGE OF TEXAS GIBB GILCHRIST, President [Blank Page in Original Bulletin] This bulletin deals...

  13. Use of parameter adjustment techniques in the simulation of multi-echelon inventory/distribution system

    E-Print Network [OSTI]

    Der Tatevasion, Thomas John

    1981-01-01T23:59:59.000Z

    USE OF PARAMETER ADJUSTI4IENT TECHNIQUES IN THE SIMULATION OF A 11ULTI-ECHELON INVENTORY/DISTRIBUTION SYSTEM A Thesis by THOMAS JOHN DER TATEVASION Submitted to the Graduate College of Texas ARM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1981 Major Subject: Industrial Engineering USE OF PARAMETER ADJUSTMENT TECHNIQUES IN THE SIMULATION OF A MULTI-ECHELOI'I INVENTORY/DISTRIBUTION SYSTEM A Thes1s by THOMAS JOHN DER TATEVASION...

  14. Energy Flow Energy Flow Energy Flow A.Ukleja, T.Tymieniecka, I.Skillicorn 1 Azimuthal asymmetry

    E-Print Network [OSTI]

    Energy Flow Energy Flow Energy Flow A.Ukleja, T.Tymieniecka, I.Skillicorn 1 Azimuthal asymmetry using energy flow method Azimuthal angle distribution at Q2 >100 GeV2 Energy flow method.Ukleja on behalf of the ZEUS Collaboration #12; Energy Flow Energy Flow Energy Flow A.Ukleja, T.Tymieniecka, I

  15. An improved model for flashing flow in short tubes

    SciTech Connect (OSTI)

    Tilton, J.D.; Kornhauser, A.A. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Mechanical Engineering

    1996-12-31T23:59:59.000Z

    Short tube restrictors are commonly used as expansion devices in refrigeration and heat pumping systems. Flashing flow through short tubes is choked, i.e. independent of downstream conditions. Flow rate is typically predicted by empirically correcting the flow rate of compressed liquid from upstream pressure to saturation pressure at upstream temperature. The empirical correction factors depend on pressure and temperature, on short tube geometry, and on the refrigerant used. This work extends and improves a model of short tube flow based on the physics of the observed flow phenomena. Short tube flow is believed to consist of a core of superheated liquid surrounded by an annulus of vapor. Evaporation is driven by heat transfer form the core to tine interface, and the flow is choked by the evaporated vapor. Flow rate is modeled by calculating the heat transfer rate, the evaporation rate, and the choking effect of the vapor. The model attempts to improve on previous work by improving the accuracy with which thermodynamic properties are approximated, by improving the heat transfer model, and by including the effects of frictional heating of the liquid. In comparisons with experimental data it is found that the improved thermodynamic modeling increases accuracy, but the change to the heat transfer model reduces accuracy. For the data examined the effects of the frictional heating are small. The heat transfer model is based on an existing analytic solution with a mixing-length turbulence model. It appears that this model must be further improved, perhaps through empirical modification.

  16. Modelling of multiphase flow in ironmaking blast furnace

    SciTech Connect (OSTI)

    Dong, X.F.; Yu, A.B.; Burgess, J.M.; Pinson, D.; Chew, S.; Zulli, P. [University of New South Wales, Sydney, NSW (Australia). School for Material Science and Engineering

    2009-01-15T23:59:59.000Z

    A mathematical model for the four-phase (gas, powder, liquid, and solids) flow in a two-dimensional ironmaking blast furnace is presented by extending the existing two-fluid flow models. The model describes the motion of gas, solid, and powder phases, based on the continuum approach, and implements the so-called force balance model for the flow of liquids, such as metal and slag in a blast furnace. The model results demonstrate a solid stagnant zone and dense powder hold-up region, as well as a dense liquid flow region that exists in the lower part of a blast furnace, which are consistent with the experimental observations reported in the literature. The simulation is extended to investigate the effects of packing properties and operational conditions on the flow and the volume fraction distribution of each phase in a blast furnace. It is found that solid movement has a significant effect on powder holdup distribution. Small solid particles and low porosity distribution are predicted to affect the fluid flow considerably, and this can cause deterioration in bed permeability. The dynamic powder holdup in a furnace increases significantly with the increase of powder diameter. The findings should be useful to better understand and control blast furnace operations.

  17. Following the predicted existence of topologically insulating matter, a large number

    E-Print Network [OSTI]

    Weston, Ken

    -sensitive probes reported the existence of Dirac quasiparticles, similar to those in graphene, on the surface

  18. Power Flow Controller for Renewables: Transformer-less Unified Power Flow Controller for Wind and Solar Power Transmission

    SciTech Connect (OSTI)

    None

    2012-02-08T23:59:59.000Z

    GENI Project: MSU is developing a power flow controller to improve the routing of electricity from renewable sources through existing power lines. The fast, innovative, and lightweight circuitry that MSU is incorporating into its controller will eliminate the need for a separate heavy and expensive transformer, as well as the construction of new transmission lines. MSU’s controller is better suited to control power flows from distributed and intermittent wind and solar power systems than traditional transformer-based controllers are, so it will help to integrate more renewable energy into the grid. MSU‘s power flow controller can be installed anywhere in the existing grid to optimize energy transmission and help reduce transmission congestion.

  19. Review and selection of unsaturated flow models

    SciTech Connect (OSTI)

    Reeves, M.; Baker, N.A.; Duguid, J.O. [INTERA, Inc., Las Vegas, NV (United States)

    1994-04-04T23:59:59.000Z

    Since the 1960`s, ground-water flow models have been used for analysis of water resources problems. In the 1970`s, emphasis began to shift to analysis of waste management problems. This shift in emphasis was largely brought about by site selection activities for geologic repositories for disposal of high-level radioactive wastes. Model development during the 1970`s and well into the 1980`s focused primarily on saturated ground-water flow because geologic repositories in salt, basalt, granite, shale, and tuff were envisioned to be below the water table. Selection of the unsaturated zone at Yucca Mountain, Nevada, for potential disposal of waste began to shift model development toward unsaturated flow models. Under the US Department of Energy (DOE), the Civilian Radioactive Waste Management System Management and Operating Contractor (CRWMS M&O) has the responsibility to review, evaluate, and document existing computer models; to conduct performance assessments; and to develop performance assessment models, where necessary. This document describes the CRWMS M&O approach to model review and evaluation (Chapter 2), and the requirements for unsaturated flow models which are the bases for selection from among the current models (Chapter 3). Chapter 4 identifies existing models, and their characteristics. Through a detailed examination of characteristics, Chapter 5 presents the selection of models for testing. Chapter 6 discusses the testing and verification of selected models. Chapters 7 and 8 give conclusions and make recommendations, respectively. Chapter 9 records the major references for each of the models reviewed. Appendix A, a collection of technical reviews for each model, contains a more complete list of references. Finally, Appendix B characterizes the problems used for model testing.

  20. Piezoelectric axial flow microvalve

    SciTech Connect (OSTI)

    Gemmen, Randall; Thornton, Jimmy; Vipperman, Jeffrey S.; Clark, William W.

    2007-01-09T23:59:59.000Z

    This invention is directed to a fuel cell operable with a quantity of fuel and a quantity of an oxidizer to produce electrical power, the fuel cell including a fuel cell body including a labyrinth system structured to permit the fuel and the oxidizer to flow therethrough; at least a first catalyst in fluid communication with the labyrinth; and at least a first microvalve operably disposed within at least a portion of the labyrinth. The microvalve utilizes a deflectable member operable upon the application of a voltage from a voltage source. The microvalve includes an elongated flow channel formed therein and extending substantially longitudinally between the first and second ends to permit substantially longitudinal flow of the fluid therethrough and between the first and second ends; and the deflectable member disposed on the valve body, the deflectable member including at least a first piezoelectric portion that is piezoelectrically operable to deflect the deflectable member between an open position and a closed position upon the application of a voltage, the deflectable member in the closed position being operable to resist the flow of the fluid through the flow channel.

  1. Gaseous Flows in Galaxies

    E-Print Network [OSTI]

    F. Combes

    2007-09-02T23:59:59.000Z

    The gas component plays a major role in the dynamics of spiral galaxies, because of its dissipative character, and its ability to exchange angular momentum with stars in the disk. Due to its small velocity dispersion, it triggers gravitational instabilities, and the corresponding non-axisymmetric patterns produce gravity torques, which mediate these angular momentum exchanges. When a srong bar pattern develops with the same pattern speed all over the disk, only gas inside corotation can flow towards the center. But strong bars are not long lived in presence of gas, and multiple-speed spiral patterns can develop between bar phases, and help the galaxy to accrete external gas flowing from cosmic filaments. The gas is then intermittently driven to the galaxy center, to form nuclear starbursts and fuel an active nucleus. The various time-scales of these gaseous flows are described.

  2. Multiphase cooling flows

    E-Print Network [OSTI]

    Peter A. Thomas

    1996-08-20T23:59:59.000Z

    I discuss the multiphase nature of the intracluster medium whose neglect can lead to overestimates of the baryon fraction of clusters by up to a factor of two. The multiphase form of the cooling flow equations are derived and reduced to a simple form for a wide class of self-similar density distributions. It is shown that steady-state cooling flows are \\emph{not} consistent with all possible emissivity profiles which can therefore be used as a test of the theory. In combination, they provide strong constraints on the mass distribution within the cooling radius.

  3. Flow cytometry apparatus

    DOE Patents [OSTI]

    Pinkel, Daniel (Walnut Creek, CA)

    1991-01-01T23:59:59.000Z

    An obstruction across the flow chamber creates a one dimensional convergence of a sheath fluid. A passageway in the construction directs flat cells near to the area of one dimensional convergence in the sheath fluid to provide proper orientation of flat cells at fast rates.

  4. AGN and Cooling Flows

    E-Print Network [OSTI]

    James Binney

    2001-03-23T23:59:59.000Z

    For two decades the steady-state cooling-flow model has dominated the literature of cluster and elliptical-galaxy X-ray sources. For ten years this model has been in severe difficulty from a theoretical point of view, and it is now coming under increasing pressure observationally. For two decades the steady-state cooling-flow model has dominated the literature of cluster and elliptical-galaxy X-ray sources. For ten years this model has been in severe difficulty from a theoretical point of view, and it is now coming under increasing pressure observationally. A small number of enthusiasts have argued for a radically different interpretation of the data, but had little impact on prevailing opinion because the unsteady heating picture that they advocate is extremely hard to work out in detail. Here I explain why it is difficult to extract robust observational predictions from the heating picture. Major problems include the variability of the sources, the different ways in which a bi-polar flow can impact on X-ray emission, the weakness of synchrotron emission from sub-relativistic flows, and the sensitivity of synchrotron emission to a magnetic field that is probably highly localized.

  5. Liquid fuel vaporizer and combustion chamber having an adjustable thermal conductor

    DOE Patents [OSTI]

    Powell, Michael R; Whyatt, Greg A; Howe, Daniel T; Fountain, Matthew S

    2014-03-04T23:59:59.000Z

    The efficiency and effectiveness of apparatuses for vaporizing and combusting liquid fuel can be improved using thermal conductors. For example, an apparatus having a liquid fuel vaporizer and a combustion chamber can be characterized by a thermal conductor that conducts heat from the combustion chamber to the vaporizer. The thermal conductor can be a movable member positioned at an insertion depth within the combustion chamber that corresponds to a rate of heat conduction from the combustion chamber to the vaporizer. The rate of heat conduction can, therefore, be adjusted by positioning the movable member at a different insertion depth.

  6. Information Basic to Farm Adjustments in the Rolling Plains Area of Texas.

    E-Print Network [OSTI]

    Bonnen, C. A. (Clarence Alfred); Czarowitz, P. H. (Philmore Hempel)

    1942-01-01T23:59:59.000Z

    , affeptiny but few farms. Because of the local nature of hail storms they may have no widespread effect upon farm incomes, but may cause partial or complete crop failures on a few farms. Damage to young crors from wind results through the rapid movement...A. B. CONNER. DIRECTOR \\ College Station, Texas \\ i 'i RULLETIS SO. 61'1 SEPTEJPEER 1942 I -4. INFORMATION BASIC TO FARM ADJUST- BTENTS IN THE ROLLING PLAIXS AREA4 OF TEXAS Di~sion of Farm nncl Xwnch Economics 3ULTURAL AND MECH...

  7. A computer test bench for checking and adjusting the automatic regulators of generator excitation systems

    SciTech Connect (OSTI)

    Dovganyuk, I. Ya.; Labunets, I. A.; Plotnikova, T. V.; Sokur, P. V. [Affiliate of the 'NTTs Elektroenergetiki' Company - Scientific Research Institute of Electric Power (VNIIE) (Russian Federation)

    2008-05-15T23:59:59.000Z

    A computer test bench for testing and debugging natural samples of the automatic excitation regulation systems of generators, the protection units and the power part of the excitation system is described. The bench includes a personal computer with specialized input-output circuit boards for analog and digital signals, and enables the time and cost involved in developing and checking control systems to be reduced considerably. The program employed operates in real time and enables the automatic excitation regulators of synchronous generators and generators with longitudinal-transverse excitation in a specific power system to be adjusted.

  8. U.S. Coalbed Methane Proved Reserves Adjustments (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto17 34 44Year Jan Feb Mar Apr May Jun602 1,397 125 QL1.PastAdjustments

  9. U.S. Natural Gas Plant Liquids, Reserves Adjustments (Million Barrels)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion Cubic Feet)Year Jan Feb Mar Apr May Jun2009Adjustments (Million

  10. Property:OpenEI/UtilityRate/EnergyRateStructure/Tier4Adjustment | Open

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal PwerPerkinsInformation DemandReactivePowerCharge JumpEnergy Information Tier4Adjustment

  11. Fair Labor Standard Act and Service Contract Act Price Adjustment UT-B Contracts Div Page 1 of 1

    E-Print Network [OSTI]

    Pennycook, Steve

    Fair Labor Standard Act and Service Contract Act ­ Price Adjustment UT-B Contracts Div Sept 2009 Page 1 of 1 flsa-price-adj-ext-sept09.doc FAIR LABOR STANDARDS ACT AND SERVICE CONTRACT ACT - PRICE

  12. Impact of Input Voltage Sag and Unbalance on DC Link Inductor and Capacitor Stress in Adjustable Speed Drives

    E-Print Network [OSTI]

    Lipo, Thomas

    , outages, voltage surges and sags. Power quality problems induced in adjustable-speed drives (ASDs) have (120 Hz for 60 Hz system) that increases the electrical stresses on the dc bus choke inductor (if used

  13. Modeling household adoption of earthquake hazard adjustments: a longitudinal panel study of Southern California and Western Washington residents 

    E-Print Network [OSTI]

    Arlikatti, Sudha S

    2006-10-30T23:59:59.000Z

    This research, aimed at advancing the theory of environmental hazard adjustment processes by contrasting households from three cities in a high seismic hazard area with households from three other cities in a moderate ...

  14. Expanded Prussian Blue Analogues Incorporating [Re6Se8(CN)6]3-/4-Clusters: Adjusting Porosity via Charge Balance

    E-Print Network [OSTI]

    Shores, Matthew P.

    Expanded Prussian Blue Analogues Incorporating [Re6Se8(CN)6]3-/4- Clusters: Adjusting Porosity via of octahedral [M(CN)6]3-/4- complexes for the synthesis of microporous Prussian blue type solids with adjustable to be a direct expansion of Prussian blue (Fe4[Fe(CN)6]3,14H2O), with [Re6Se8(CN)6]4- clusters connected through

  15. Glass as a Building Element – A Sustainable Approach: A Study of an Existing Academic Building

    E-Print Network [OSTI]

    Jori, Swapnil Shriram

    2011-02-22T23:59:59.000Z

    . An energy analysis model of an existing academic building in College Station, Texas was developed using Design Builder computer simulation software. This model was then analyzed for the total amount of energy consumption in the base case. The existing...

  16. Research on Commercial Patterns of China Existing Building Energy Retrofit Based on Energy Management Contract 

    E-Print Network [OSTI]

    Han, Z.; Liu, C.; Sun, J.

    2006-01-01T23:59:59.000Z

    Existing building energy retrofit is one of the keys of building energy efficiency in China. According to experience in developed countries, implementation of energy management contract (EMC) is crucial to promote existing building energy retrofit...

  17. Mesquite Solar Plan - build out next to existing FF plants Solar...

    Open Energy Info (EERE)

    Mesquite Solar Plan - build out next to existing FF plants Solar Power Plant Jump to: navigation, search Name Mesquite Solar Plan - build out next to existing FF plants Solar Power...

  18. Research on Commercial Patterns of China Existing Building Energy Retrofit Based on Energy Management Contract

    E-Print Network [OSTI]

    Han, Z.; Liu, C.; Sun, J.

    2006-01-01T23:59:59.000Z

    Existing building energy retrofit is one of the keys of building energy efficiency in China. According to experience in developed countries, implementation of energy management contract (EMC) is crucial to promote existing building energy retrofit...

  19. In-use modification of existing public housing in Cairo, Egypt

    E-Print Network [OSTI]

    Tolba Sakr, Samia Abou El Fetouh

    1983-01-01T23:59:59.000Z

    The primary goal of this thesis is to analyze and evaluation existing public housing in Egypt, with the aim of: 1. Modifying existing conditions, and 2. Developing alternative design concepts to meet with present and future ...

  20. Developing and Integrating Sustainable Chemical Processes into Existing Petro-Chemical Plant Complexes

    E-Print Network [OSTI]

    Pike, Ralph W.

    Developing and Integrating Sustainable Chemical Processes into Existing Petro-Chemical Plant Complexes #12;Outline · Introduction to Sustainable Development · Research Vision · Biomass conversion of biotechnology in existing plant complex · Conclusions #12;Sustainability Sustainability refers to integrating

  1. Bridging the Gap Between Commissioning Measures and Large Scale Retrofits in Existing Buildings

    E-Print Network [OSTI]

    Bynum, J.; Jones, A.; Claridge, D.E.

    2011-01-01T23:59:59.000Z

    Most often commissioning of existing buildings seeks to reduce a building's energy consumption by implementation of operational changes via the existing equipment. In contrast, large scale capital retrofits seek to make major changes...

  2. Bridging the Gap Between Commissioning Measures and Large Scale Retrofits in Existing Buildings

    E-Print Network [OSTI]

    Bynum, J.; Jones, A.; Claridge, D. E.

    Most often commissioning of existing buildings seeks to reduce a building’s energy consumption by implementation of operational changes via the existing equipment. In contrast, large scale capital retrofits seek to make major changes to the systems...

  3. SciTech Connect: Reducing Energy Use in Existing Homes by 30...

    Office of Scientific and Technical Information (OSTI)

    Reducing Energy Use in Existing Homes by 30%: Learning From Home Performance with ENERGY STAR Citation Details In-Document Search Title: Reducing Energy Use in Existing Homes by...

  4. Enabling Robustness in Existing BPEL Processes Technical Report FIU-SCIS-2005-08

    E-Print Network [OSTI]

    Sadjadi, S. Masoud

    on such autonomous web services is to check that they fulfill their service contracts [32]. Existing methods

  5. Monitoring-based HVAC Commissioning of an Existing Office Building for Energy Efficiciency

    E-Print Network [OSTI]

    Wang, Liping

    2014-01-01T23:59:59.000Z

    2008. [28] California Commissioning Collaborative .Existing Building Commissioning Toolkit. 2012. Retrievedof Commerical-Buildings Commissioning. A Meta-Analysis of

  6. Coupling free flow / porous-medium flow General idea

    E-Print Network [OSTI]

    Cirpka, Olaf Arie

    equation t (v) + div (vv ) - div(v) + p - g - qv = 0 Darcy flow equation t (S) - div K (p - g) - qpmT transport equation t (X) + div (vX - DsteamX) = qsteam 16/14 #12;Backup additional Darcy flow equations-Stokes 1 phase, 2 components, temperature sharp interface porous-medium / Darcy flow 2 phases, 2 component

  7. Heat flow and geothermal studies in the state of Washington

    SciTech Connect (OSTI)

    Blackwell, D.D.; Steele, J.L.; Kelley, S.A.

    1985-08-01T23:59:59.000Z

    Existing geothermal gradient and heat flow data for the state of Washington are summarized. In addition, information on mean-annual ground surface temperatures is included. The data consist of accurate, detailed temperature-depth measurements in selected available holes throughout the state of Washington made between 1979 and 1982. Measurements of thermal conductivity on selected rock samples from these drill holes and ancillary information required to assess the significance of the data and calculate heat flow values were obtained as well. Information is presented on the mean-annual ground-surface temperatures throughout the state of Washington. 32 refs., 15 figs., 4 tabs.

  8. Resonant frequency detection and adjustment method for a capacitive transducer with differential transformer bridge

    SciTech Connect (OSTI)

    Hu, M.; Bai, Y. Z., E-mail: abai@mail.hust.edu.cn; Zhou, Z. B., E-mail: zhouzb@mail.hust.edu.cn; Li, Z. X.; Luo, J. [MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China)] [MOE Key Laboratory of Fundamental Physical Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-05-15T23:59:59.000Z

    The capacitive transducer with differential transformer bridge is widely used in ultra-sensitive space accelerometers due to their simple structure and high resolution. In this paper, the front-end electronics of an inductive-capacitive resonant bridge transducer is analyzed. The analysis result shows that the performance of this transducer depends upon the case that the AC pumping frequency operates at the resonance point of the inductive-capacitive bridge. The effect of possible mismatch between the AC pumping frequency and the actual resonant frequency is discussed, and the theoretical analysis indicates that the output voltage noise of the front-end electronics will deteriorate by a factor of about 3 due to either a 5% variation of the AC pumping frequency or a 10% variation of the tuning capacitance. A pre-scanning method to determine the actual resonant frequency is proposed followed by the adjustment of the operating frequency or the change of the tuning capacitance in order to maintain expected high resolution level. An experiment to verify the mismatching effect and the adjustment method is provided.

  9. Message Flow Modulator Final Report

    E-Print Network [OSTI]

    Boyer, Robert Stephen

    operational environment at the Patuxent River Naval Air Test Center with scenarios developed by an independent in testing and demonstrating the flow modulator at the Patuxent River Naval Air Test Center. #12;MESSAGE FLOW

  10. Radial flow pulse jet mixer

    DOE Patents [OSTI]

    VanOsdol, John G.

    2013-06-25T23:59:59.000Z

    The disclosure provides a pulse jet mixing vessel for mixing a plurality of solid particles. The pulse jet mixing vessel is comprised of a sludge basin, a flow surface surrounding the sludge basin, and a downcoming flow annulus between the flow surface and an inner shroud. The pulse jet mixing vessel is additionally comprised of an upper vessel pressurization volume in fluid communication with the downcoming flow annulus, and an inner shroud surge volume separated from the downcoming flow annulus by the inner shroud. When the solid particles are resting on the sludge basin and a fluid such as water is atop the particles and extending into the downcoming flow annulus and the inner shroud surge volume, mixing occurs by pressurization of the upper vessel pressurization volume, generating an inward radial flow over the flow surface and an upwash jet at the center of the sludge basin.

  11. Flow (2008) Director: Irena Salina

    E-Print Network [OSTI]

    Hemmers, Oliver

    2008-01-01T23:59:59.000Z

    Flow (2008) Director: Irena Salina Run Time: 93 min. Summary: ,Irena Salina's documentary film://documentaryfilms.suite101.com/article.cfm/desperate_for_water_irena_salinas_movie_flow No Dumb Questions (2001) Director

  12. Adjusted Streamflow and Storage 1928-1989 : with Listings of Historical Streamflow, Summation of Storage Change and Adjusted Streamflow : Columbia River and Coastal Basins.

    SciTech Connect (OSTI)

    A.G. Crook Company

    1993-04-01T23:59:59.000Z

    The development of irrigation projects since the 1830's and the construction of major dams and reservoirs since the early 1900's have altered substantially the natural streamflow regimen of the Columbia River and its tributaries. As development expanded a multipurpose approach to streamflow regulation evolved to provide flood control, irrigation, hydropower generation, navigation, recreation, water quality enhancement, fish and wildlife, and instream flow maintenance. The responsible agencies use computer programs to determine the effects of various alternative system regulations. This report describes the development of the streamflow data that these computer programs use.

  13. Ricci flow and quantum theory

    E-Print Network [OSTI]

    Robert Carroll

    2007-11-05T23:59:59.000Z

    We show some relations between Ricci flow and quantum theory via Fisher information and the quantum potential.

  14. Progress in Grid Scale Flow Batteries

    E-Print Network [OSTI]

    2011Year #12;Flow Battery Research at PNNL and Sandia #12 with industries and universities New Generation Redox Flow Batteries, PNNL Developed new generation redox flow

  15. Retrofit Installations of Adjustable Speed Drives to Conserve Energy at Industrial Facilities

    E-Print Network [OSTI]

    Porcaro, C. R.; Galstaun, L. S.; Holmes, M. L.

    1984-01-01T23:59:59.000Z

    This paper is a progress report on a study funded by the Electrical Power Research Institute (EPRI). The purpose of the study is to identify and analyze existing installations that appear to offer opportunities for energy conservation through...

  16. The Big Flow

    E-Print Network [OSTI]

    P. Sikivie

    2001-12-04T23:59:59.000Z

    The late infall of cold dark matter onto an isolated galaxy, such as our own, produces streams and caustics in its halo. The outer caustics are topological spheres whereas the inner caustics are rings. The self-similar model of galactic halo formation predicts that the caustic ring radii $a_n$ follow the approximate law $a_n \\sim 1/n$. In a study of 32 extended and well-measured external galactic rotation curves evidence was found for this law. In the case of the Milky Way, the locations of eight sharp rises in the rotation curve fit the prediction of the self-similar model at the 3% level. Moreover, a triangular feature in the IRAS map of the galactic plane is consistent with the imprint of a ring caustic upon the baryonic matter. These observations imply that the dark matter in our neighborhood is dominated by a single flow. Estimates of that flow's density and velocity vector are given.

  17. Structural power flow measurement

    SciTech Connect (OSTI)

    Falter, K.J.; Keltie, R.F.

    1988-12-01T23:59:59.000Z

    Previous investigations of structural power flow through beam-like structures resulted in some unexplained anomalies in the calculated data. In order to develop structural power flow measurement as a viable technique for machine tool design, the causes of these anomalies needed to be found. Once found, techniques for eliminating the errors could be developed. Error sources were found in the experimental apparatus itself as well as in the instrumentation. Although flexural waves are the carriers of power in the experimental apparatus, at some frequencies longitudinal waves were excited which were picked up by the accelerometers and altered power measurements. Errors were found in the phase and gain response of the sensors and amplifiers used for measurement. A transfer function correction technique was employed to compensate for these instrumentation errors.

  18. Convective heat flow probe

    DOE Patents [OSTI]

    Dunn, J.C.; Hardee, H.C.; Striker, R.P.

    1984-01-09T23:59:59.000Z

    A convective heat flow probe device is provided which measures heat flow and fluid flow magnitude in the formation surrounding a borehole. The probe comprises an elongate housing adapted to be lowered down into the borehole; a plurality of heaters extending along the probe for heating the formation surrounding the borehole; a plurality of temperature sensors arranged around the periphery of the probe for measuring the temperature of the surrounding formation after heating thereof by the heater elements. The temperature sensors and heater elements are mounted in a plurality of separate heater pads which are supported by the housing and which are adapted to be radially expanded into firm engagement with the walls of the borehole. The heat supplied by the heater elements and the temperatures measured by the temperature sensors are monitored and used in providing the desired measurements. The outer peripheral surfaces of the heater pads are configured as segments of a cylinder and form a full cylinder when taken together. A plurality of temperature sensors are located on each pad so as to extend along the length and across the width thereof, with a heating element being located in each pad beneath the temperature sensors. An expansion mechanism driven by a clamping motor provides expansion and retraction of the heater pads and expandable packet-type seals are provided along the probe above and below the heater pads.

  19. Environmentally related water trading, transfers and environmental flows: welfare, water demand and flows

    E-Print Network [OSTI]

    Han, Man Seung

    2008-10-10T23:59:59.000Z

    by source, and the other by sector. Demand by source is comprised of two sources: existing source basins (DIVERSIONQ) and new source basins (USER IBT). The variable DIVERTERUSE designates total water diverted by a river location for each sector in a given... development of a Texas surface water model. The developed model incorporates: (a) uncertain weather patterns and supply of iv water; (b) river flows in most of the Texas river basins - twenty-one basins excluding only the Rio Grande; (c) demand for water...

  20. TECHNOLOGIES TO ENHANCE THE OPERATION OF EXISTING NATURAL GAS COMPRESSION INFRASTRUCTURE

    SciTech Connect (OSTI)

    Anthony J. Smalley; Ralph E. Harris; Gary D. Bourn; Ford A. Phillips; Danny M. Deffenbaugh

    2006-05-31T23:59:59.000Z

    This project has documented and demonstrated the feasibility of technologies and operational choices for companies who operate the large installed fleet of integral engine compressors in pipeline service. Continued operations of this fleet is required to meet the projected growth of the U.S. gas market. Applying project results will meet the goals of the DOE-NETL Natural Gas Infrastructure program to enhance integrity, extend life, improve efficiency, and increase capacity, while managing NOx emissions. These benefits will translate into lower cost, more reliable gas transmission, and options for increasing deliverability from the existing infrastructure on high demand days. The power cylinders on large bore slow-speed integral engine/compressors do not in general combust equally. Variations in cylinder pressure between power cylinders occur cycle-to-cycle. These variations affect both individual cylinder performance and unit average performance. The magnitude of the variations in power cylinder combustion is dependent on a variety of parameters, including air/fuel ratio. Large variations in cylinder performance and peak firing pressure can lead to detonation and misfires, both of which can be damaging to the unit. Reducing the variation in combustion pressure, and moving the high and low performing cylinders closer to the mean is the goal of engine balancing. The benefit of improving the state of the engine ''balance'' is a small reduction in heat rate and a significant reduction in both crankshaft strain and emissions. A new method invented during the course of this project is combustion pressure ratio (CPR) balancing. This method is more effective than current methods because it naturally accounts for differences in compression pressure, which results from cylinder-to-cylinder differences in the amount of air flowing through the inlet ports and trapped at port closure. It also helps avoid compensation for low compression pressure by the addition of excess fuel to achieve equalizing peak firing pressure, even if some of the compression pressure differences are attributed to differences in cylinder and piston geometry, clearance, and kinematics. The combination of high-pressure fuel injection and turbocharging should produce better mixing of fuel and air in lean mixtures. Test results documented modest improvements in heat rate and efficiency and significant improvements in emissions. The feasibility of a closed-loop control of waste-gate setting, which will maintain an equivalence ratio set point, has been demonstrated. This capability allows more direct tuning to enhance combustion stability, heat rate, or emissions. The project has documented the strong dependence of heat rate on load. The feasibility of directly measuring power and torque using the GMRC Rod Load Monitor (RLM) has been demonstrated. This capability helps to optimize heat rate while avoiding overload. The crankshaft Strain Data Capture Module (SDCM) has shown the sensitivity to changes in operating conditions and how they influence crankshaft bending strain. The results indicate that: balancing reduces the frequency of high-strain excursions, advanced timing directly increases crankshaft dynamic strain, reduced speed directly reduces strain, and high-pressure fuel injection reduces crankshaft strain slightly. The project demonstrated that when the timing is advanced, the heat rate is reduced, and when the timing is retarded, the heat rate is increased. One reason why timing is not advanced as much as it might be is the potential for detonation on hot days. A low-cost knock detector was demonstrated that allowed active control to use timing to allow the heat rate benefit to be realized safely. High flow resistance losses in the pulsation control systems installed on some compressors have been shown to hurt efficiency of both compressor and engine/compressor system. Improved pulsation control systems have the potential to recover almost 10% of available engine power. Integrity enhancements and reduced component failure probability will enhance aggregate

  1. Holography as a highly efficient RG flow : Part 1

    E-Print Network [OSTI]

    Behr, Nicolas; Mukhopadhyay, Ayan

    2015-01-01T23:59:59.000Z

    We investigate how the holographic correspondence can be reconstructed as a special RG flow in a strongly interacting large $N$ field theory. We firstly define a "highly efficient RG flow" as one in which the cut-off in momentum space can be adjusted as a functional of the elementary fields, and of the external sources and of the background metric in order to be compatible with the following requirement: the Ward identities for single-trace operators involving conservation of energy, momentum and global charges must preserve the same form at every scale. In order to absorb the contributions of the multi-trace operators to these effective Ward identities, the external sources and the background metric need to be redefined at each scale, and thus they become dynamical as in the dual gravity equations. We give a schematic construction of such highly efficient RG flows using appropriate collective variables, leaving a more explicit construction in certain limits to the second part of this work. We find that all h...

  2. Installation of a Low Flow Unit at the Abiquiu Hydroelectric Facility

    SciTech Connect (OSTI)

    Jack Q. Richardson

    2012-06-28T23:59:59.000Z

    Final Technical Report for the Recovery Act Project for the Installation of a Low Flow Unit at the Abiquiu Hydroelectric Facility. The Abiquiu hydroelectric facility existed with two each 6.9 MW vertical flow Francis turbine-generators. This project installed a new 3.1 MW horizontal flow low flow turbine-generator. The total plant flow range to capture energy and generate power increased from between 250 and 1,300 cfs to between 75 and 1,550 cfs. Fifty full time equivalent (FTE) construction jobs were created for this project - 50% (or 25 FTE) were credited to ARRA funding due to the ARRA 50% project cost match. The Abiquiu facility has increased capacity, increased efficiency and provides for an improved aquatic environment owing to installed dissolved oxygen capabilities during traditional low flow periods in the Rio Chama. A new powerhouse addition was constructed to house the new turbine-generator equipment.

  3. Dispersion of swimming algae in laminar and turbulent channel flows: theory and simulations

    E-Print Network [OSTI]

    Croze, O A; Ahmed, M; Bees, M A; Brandt, L

    2012-01-01T23:59:59.000Z

    Algal swimming is often biased by environmental cues, e.g. gravitational and viscous torques drive cells towards downwelling fluid (gyrotaxis). In view of biotechnological applications, it is important to understand how such biased swimming affects cell dispersion in a flow. Here, we study the dispersion of gyrotactic swimming algae in laminar and turbulent channel flows. By direct numerical simulation (DNS) of cell motion within upwelling and downwelling channel flows, we evaluate time-dependent measures of dispersion for increasing values of the flow Peclet (Reynolds) numbers, Pe (Re). Furthermore, we derive an analytical `swimming Taylor-Aris dispersion' theory, using flow-dependent transport parameters given by existing microscopic models. In the laminar regime, DNS results and analytical predictions compare very well, providing the first confirmation that cells' response to flow is best described by the generalized-Taylor-dispersion microscopic model. We predict that cells drift along a channel faster th...

  4. Evaluation of the existing performance models used for pavement management by the Texas Department of Transportation

    E-Print Network [OSTI]

    Mukherjee, Biswajit

    1998-01-01T23:59:59.000Z

    lighter treatment) as the time to rehabilitation decreases. The most cost- effective pavement is that which requires the least life cycle cost. Life cycle cost is the total cost of new construction and M&R during the entire life of a pavement adjusted.... The purpose of project level PMS is to determine the most cost- effective treatments for the selected pavement sections within available funding, materials and other constraints (2, 3). In network level analysis, pavement sections are selected based...

  5. Justifying and Planning an Energy Monitoring System in an Existing Plant

    E-Print Network [OSTI]

    Stublen, A. P.; Wellman, C. M.; Kell, S. A.

    benefits are needed on all sites. For example, harmonic monitoring is only needed on substations with tuned filters. Disturbance monitoring is only needed on purchased power substations and on large adjustable speed-drive applications where power dip... availability. Under permanent investment, include the cost of potential new substations and medium voltage feeders; count potential energy savings from interruptible load and peak shaving under variable cost. Conceptual Design and Estimating. When a...

  6. Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers

    SciTech Connect (OSTI)

    Adams, Bradley; Davis, Kevin; Senior, Constance; Shim, Hong Shim; Otten, Brydger; Fry, Andrew; Wendt, Jost; Eddings, Eric; Paschedag, Alan; Shaddix, Christopher; Cox, William; Tree, Dale

    2013-09-30T23:59:59.000Z

    Reaction Engineering International (REI) managed a team of experts from University of Utah, Siemens Energy, Praxair, Vattenfall AB, Sandia National Laboratories, Brigham Young University (BYU) and Corrosion Management Ltd. to perform multi-scale experiments, coupled with mechanism development, process modeling and CFD modeling, for both applied and fundamental investigations. The primary objective of this program was to acquire data and develop tools to characterize and predict impacts of CO{sub 2} flue gas recycle and burner feed design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) inherent in the retrofit of existing coal-fired boilers for oxy-coal combustion. Experimental work was conducted at Sandia National Laboratories’ Entrained Flow Reactor, the University of Utah Industrial Combustion Research Facility, and Brigham Young University. Process modeling and computational fluid dynamics (CFD) modeling was performed at REI. Successful completion of the project objectives resulted in the following key deliverables: 1) Multi-scale test data from 0.1 kW bench-scale, 100 kW and 200 kW laboratory-scale, and 1 MW semi-industrial scale combustors that describe differences in flame characteristics, fouling, slagging and corrosion for coal combustion under air-firing and oxygen-firing conditions, including sensitivity to oxy-burner design and flue gas recycle composition. 2) Validated mechanisms developed from test data that describe fouling, slagging, waterwall corrosion, heat transfer, char burnout and sooting under coal oxy-combustion conditions. The mechanisms were presented in a form suitable for inclusion in CFD models or process models. 3) Principles to guide design of pilot-scale and full-scale coal oxy-firing systems and flue gas recycle configurations, such that boiler operational impacts from oxy-combustion retrofits are minimized. 4) Assessment of oxy-combustion impacts in two full-scale coal-fired utility boiler retrofits based on computational fluid dynamics (CFD) modeling of air-fired and oxygen-fired operation. This research determined that it is technically feasible to retrofit the combustion system in an air-fired boiler for oxy-fired operation. The impacts of CO{sub 2} flue gas recycle and burner design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) were minimal, with the exception of high sulfur levels resulting from untreated flue gas recycle with medium and high-sulfur coals. This work focused on combustion in the radiant and convective sections of the boiler and did not address boiler system integration issues, plant efficiencies, impacts on downstream air pollution control devices, or CO{sub 2} capture and compression. The experimental data, oxy-firing system principles and oxy-combustion process mechanisms provided by this work can be used by electric utilities, boiler OEMs, equipment suppliers, design firms, software vendors, consultants and government agencies to assess retrofit applications of oxy-combustion technologies to existing boilers and to guide development of new designs.

  7. No steady water waves of small amplitude are supported by a shear flow with still free surface

    E-Print Network [OSTI]

    Vladimir Kozlov; Nikolay Kuznetsov

    2012-09-17T23:59:59.000Z

    The two-dimensional free-boundary problem describing steady gravity waves with vorticity on water of finite depth is considered. It is proved that no small-amplitude waves are supported by a horizontal shear flow whose free surface is still in a coordinate frame such that the flow is time-independent in it. The class of vorticity distributions for which such flows exist includes all positive constant distributions, as well as linear and quadric ones with arbitrary positive coefficients.

  8. Self-adjustable supplemental support system for a cylindrical container in a housing

    DOE Patents [OSTI]

    Blaushild, Ronald M. (Wilkinsburg, PA)

    1987-01-01T23:59:59.000Z

    A self-adjustable supplementary support system for a cylindrical container coaxially disposed in a cylindrical housing by upper flanged supports has a plurality of outwardly extending bracket units on the external surface of the container which coact with inwardly extending resiliently outwardly extending bracket units on the inner wall of the cylindrical housing. The bracket units have flanges which form a concave surface that seats on support bars, attached by links to torsion bars that are secured to ring segments annularly spaced about the inner wall of the cylindrical housing and the bracket units and support bars coact with each other to radially position and support the container in the housing during movement of the two components from a vertical to a horizontal position, and during transportation of the same.

  9. Self-adjustable supplemental support system for a cylindrical container in a housing

    DOE Patents [OSTI]

    Blaushild, R.M.

    1987-01-30T23:59:59.000Z

    A self-adjustable supplementary support system for a cylindrical container coaxially disposed in a cylindrical housing by upper flanged supports has a plurality of outwardly extending bracket units on the external surface of the container which coact with inwardly extending resiliently outwardly extending bracket units on the inner wall of the cylindrical housing. The bracket units have flanges which form a concave surface that seats on support bars, attached by links to torsion bars that are secured to ring segments annularly spaced about the inner wall of the cylindrical housing and the bracket units and support bars coact with each other to radially position and support the container in the housing during movement of the two components from a vertical to a horizontal position, and during transportation of the same. 14 figs.

  10. Methods, systems and apparatus for adjusting duty cycle of pulse width modulated (PWM) waveforms

    DOE Patents [OSTI]

    Gallegos-Lopez, Gabriel; Kinoshita, Michael H; Ransom, Ray M; Perisic, Milun

    2013-05-21T23:59:59.000Z

    Embodiments of the present invention relate to methods, systems and apparatus for controlling operation of a multi-phase machine in a vector controlled motor drive system when the multi-phase machine operates in an overmodulation region. The disclosed embodiments provide a mechanism for adjusting a duty cycle of PWM waveforms so that the correct phase voltage command signals are applied at the angle transitions. This can reduce variations/errors in the phase voltage command signals applied to the multi-phase machine so that phase current may be properly regulated thus reducing current/torque oscillation, which can in turn improve machine efficiency and performance, as well as utilization of the DC voltage source.

  11. A study of potential flow through the blade profile of a rotodynamic machine by an electrically conducting sheet analog

    E-Print Network [OSTI]

    Varadarajan, Rasipur Narasimha

    1960-01-01T23:59:59.000Z

    is called a blade cascade. Wind tunnel tests are costly and require expensive test equipment. Useful information- on particular profiles and cascade arrangements is available in the pub- lished reports. But the designer is frequently confronted...- perly designed airfoil always adjusts itself in such a manner that the velocity at the trailing edge is finite" would be satisfied. Method II: Only one flow passage between the two adjacent blade profiles was considered. Here, lift force (effect...

  12. Institutional Adjustments for Coping with Prolonged and Severe Drought in the Rio Grande Basin

    E-Print Network [OSTI]

    Ward, Frank A.; Young, Robert; Lacewell, Ronald D.; King, J. Philip; Frasier, Marshall; McGuckin, J. Thomas; DuMars, Charles R.; Booker, James; Ellis, John; Srinivasan, Raghavan

    and industrial needs of cities like Albuquerque and El Paso, the Rio Grande represents a significant resource in the arid southwest. In 1938, Congress approved the Rio Grande Compact which divided the annual water flow among the three states of Colorado, New...

  13. Complex Flow Workshop Report

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube platformBuildingCoalComplex Flow Workshop Report January 17-18, 2012 University

  14. Non-axisymmetric Flows

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire Solar541,9337,2AprilBig EddyNobelNon-axisymmetric Flows and

  15. On the existence of affine Landau-Ginzburg phases in gauged linear sigma models

    E-Print Network [OSTI]

    Patrick Clarke; Josh Guffin

    2010-09-04T23:59:59.000Z

    We prove a simple criterion for the existence of an affine Landau-Ginzburg point in the K\\"ahler moduli space of a gauged linear sigma model.

  16. New Particle and Energy "Timeless Particle" and "Timeless Energy" that Existed Before the Beginning of Time

    E-Print Network [OSTI]

    Ali Riza Akcay

    2004-05-18T23:59:59.000Z

    This paper gives preliminary information regarding the new particles and energies titled "Timeless Particle" and "Timeless Energy" that existed before the beginning of time.

  17. Inventory of Existing Programs and Activities in the Lower Willamette Subbasin

    E-Print Network [OSTI]

    1 Appendix O Inventory of Existing Programs and Activities in the Lower Willamette Subbasin Within partnerships, inventories, manuals, regulations, and individual projects for the subbasin's land, streams

  18. Mechanisms Leading to Co-Existence of Gas Hydrate in Ocean Sediments [Part 1 of 2

    SciTech Connect (OSTI)

    Bryant, Steven; Juanes, Ruben

    2011-12-31T23:59:59.000Z

    In this project we have sought to explain the co-existence of gas and hydrate phases in sediments within the gas hydrate stability zone. We have focused on the gas/brine interface at the scale of individual grains in the sediment. The capillary forces associated with a gas/brine interface play a dominant role in many processes that occur in the pores of sediments and sedimentary rocks. The mechanical forces associated with the same interface can lead to fracture initiation and propagation in hydrate-bearing sediments. Thus the unifying theme of the research reported here is that pore scale phenomena are key to understanding large scale phenomena in hydrate-bearing sediments whenever a free gas phase is present. Our analysis of pore-scale phenomena in this project has delineated three regimes that govern processes in which the gas phase pressure is increasing: fracturing, capillary fingering and viscous fingering. These regimes are characterized by different morphology of the region invaded by the gas. On the other hand when the gas phase pressure is decreasing, the corresponding regimes are capillary fingering and compaction. In this project, we studied all these regimes except compaction. Many processes of interest in hydrate-bearing sediments can be better understood when placed in the context of the appropriate regime. For example, hydrate formation in sub-permafrost sediments falls in the capillary fingering regime, whereas gas invasion into ocean sediments is likely to fall into the fracturing regime. Our research provides insight into the mechanisms by which gas reservoirs are converted to hydrate as the base of the gas hydrate stability zone descends through the reservoir. If the reservoir was no longer being charged, then variation in grain size distribution within the reservoir explain hydrate saturation profiles such as that at Mt. Elbert, where sand-rich intervals containing little hydrate are interspersed between intervals containing large hydrate saturations. Large volumes (of order one pore volume) of gaseous and aqueous phases must be transported into the gas hydrate stability zone. The driver for this transport is the pressure sink induced by a reduction in occupied pore volume that accompanies the formation of hydrate from gas and water. Pore-scale imbibition models and bed-scale multiphase flow models indicate that the rate-limiting step in converting gas to hydrate is the supply of water to the hydrate stability zone. Moreover, the water supply rate is controlled by capillarity-driven flux for conditions typical of the Alaska North Slope. A meter-scale laboratory experiment confirms that significant volumes of fluid phases move into the hydrate stability zone and that capillarity is essential for the water flux. The model shows that without capillarity-driven flux, large saturations of hydrate cannot form. The observations of thick zones of large saturation at Mallik and Mt Elbert thus suggest that the primary control on these systems is the rate of transport of gaseous and aqueous phases, driven by the pressure sink at the base of the gas hydrate stability zone. A key finding of our project is the elucidation of ?capillary fracturing? as a dominant gas transport mechanism in low-permeability media. We initially investigate this phenomenon by means of grain-scale simulations in which we extended a discrete element mechanics code (PFC, by Itasca) to incorporate the dynamics of first single-phase and then multiphase flow. A reductionist model on a square lattice allows us to determine some of the fundamental dependencies of the mode of gas invasion (capillary fingering, viscous fingering, and fracturing) on the parameters of the system. We then show that the morphology of the gas-invaded region exerts a fundamental control on the fabric of methane hydrate formation, and on the overpressures caused by methane hydrate dissociation. We demonstrate the existence of the different invasion regimes by means of controlled laboratory experiments in a radial cell. We collapse the behavior in the form of a phase di

  19. Mechanisms Leading to Co-Existence of Gas Hydrate in Ocean Sediments [Part 2 of 2

    SciTech Connect (OSTI)

    Bryant, Steven; Juanes, Ruben

    2011-12-31T23:59:59.000Z

    In this project we have sought to explain the co-existence of gas and hydrate phases in sediments within the gas hydrate stability zone. We have focused on the gas/brine interface at the scale of individual grains in the sediment. The capillary forces associated with a gas/brine interface play a dominant role in many processes that occur in the pores of sediments and sedimentary rocks. The mechanical forces associated with the same interface can lead to fracture initiation and propagation in hydrate-bearing sediments. Thus the unifying theme of the research reported here is that pore scale phenomena are key to understanding large scale phenomena in hydrate-bearing sediments whenever a free gas phase is present. Our analysis of pore-scale phenomena in this project has delineated three regimes that govern processes in which the gas phase pressure is increasing: fracturing, capillary fingering and viscous fingering. These regimes are characterized by different morphology of the region invaded by the gas. On the other hand when the gas phase pressure is decreasing, the corresponding regimes are capillary fingering and compaction. In this project, we studied all these regimes except compaction. Many processes of interest in hydrate-bearing sediments can be better understood when placed in the context of the appropriate regime. For example, hydrate formation in sub-permafrost sediments falls in the capillary fingering regime, whereas gas invasion into ocean sediments is likely to fall into the fracturing regime. Our research provides insight into the mechanisms by which gas reservoirs are converted to hydrate as the base of the gas hydrate stability zone descends through the reservoir. If the reservoir was no longer being charged, then variation in grain size distribution within the reservoir explain hydrate saturation profiles such as that at Mt. Elbert, where sand-rich intervals containing little hydrate are interspersed between intervals containing large hydrate saturations. Large volumes (of order one pore volume) of gaseous and aqueous phases must be transported into the gas hydrate stability zone. The driver for this transport is the pressure sink induced by a reduction in occupied pore volume that accompanies the formation of hydrate from gas and water. Pore-scale imbibition models and bed-scale multiphase flow models indicate that the rate-limiting step in converting gas to hydrate is the supply of water to the hydrate stability zone. Moreover, the water supply rate is controlled by capillarity-driven flux for conditions typical of the Alaska North Slope. A meter-scale laboratory experiment confirms that significant volumes of fluid phases move into the hydrate stability zone and that capillarity is essential for the water flux. The model shows that without capillarity-driven flux, large saturations of hydrate cannot form. The observations of thick zones of large saturation at Mallik and Mt Elbert thus suggest that the primary control on these systems is the rate of transport of gaseous and aqueous phases, driven by the pressure sink at the base of the gas hydrate stability zone. A key finding of our project is the elucidation of ?capillary fracturing? as a dominant gas transport mechanism in low-permeability media. We initially investigate this phenomenon by means of grain-scale simulations in which we extended a discrete element mechanics code (PFC, by Itasca) to incorporate the dynamics of first singlephase and then multiphase flow. A reductionist model on a square lattice allows us to determine some of the fundamental dependencies of the mode of gas invasion (capillary fingering, viscous fingering, and fracturing) on the parameters of the system. We then show that the morphology of the gas-invaded region exerts a fundamental control on the fabric of methane hydrate formation, and on the overpressures caused by methane hydrate dissociation. We demonstrate the existence of the different invasion regimes by means of controlled laboratory experiments in a radial cell. We collapse the behavior in the form of a phase dia

  20. Fluid flow monitoring device

    DOE Patents [OSTI]

    McKay, M.D.; Sweeney, C.E.; Spangler, B.S. Jr.

    1993-11-30T23:59:59.000Z

    A flow meter and temperature measuring device are described comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips. 7 figures.

  1. Fluid flow monitoring device

    DOE Patents [OSTI]

    McKay, Mark D. (1426 Socastee Dr., North Augusta, SC 29841); Sweeney, Chad E. (3600 Westhampton Dr., Martinez, GA 30907-3036); Spangler, Jr., B. Samuel (2715 Margate Dr., Augusta, GA 30909)

    1993-01-01T23:59:59.000Z

    A flow meter and temperature measuring device comprising a tube with a body centered therein for restricting flow and a sleeve at the upper end of the tube to carry several channels formed longitudinally in the sleeve to the appropriate axial location where they penetrate the tube to allow pressure measurements and temperature measurements with thermocouples. The high pressure measurement is made using a channel penetrating the tube away from the body and the low pressure measurement is made at a location at the widest part of the body. An end plug seals the end of the device and holes at its upper end allow fluid to pass from the interior of the tube into a plenum. The channels are made by cutting grooves in the sleeve, the grooves widened at the surface of the sleeve and then a strip of sleeve material is welded to the grooves closing the channels. Preferably the sleeve is packed with powdered graphite before cutting the grooves and welding the strips.

  2. Radial flow heat exchanger

    DOE Patents [OSTI]

    Valenzuela, Javier (Hanover, NH)

    2001-01-01T23:59:59.000Z

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

  3. Integrated supercritical water gasification combined cycle (IGCC) systems for improved performance and reduced operating costs in existing plants

    SciTech Connect (OSTI)

    Tolman, R.; Parkinson, W.J.

    1999-07-01T23:59:59.000Z

    A revolutionary hydrothermal heat recovery steam generator (HRSG) is being developed to produce clean fuels for gas turbines from slurries and emulsions of opportunity fuels. Water can be above 80% by weight and solids below 20%, including coal fines, coal water fuels, biomass, composted municipal refuse, sewage sludge and bitumen/Orimulsion. The patented HRSG tubes use a commercial method of particle scrubbing to improve heat transfer and prevent corrosion and deposition on heat transfer surfaces. A continuous-flow pilot plant is planned to test the HRSG over a wide range of operating conditions, including the supercritical conditions of water, above 221 bar (3,205 psia) and 374 C (705 F). Bench scale data shows, that supercritical water gasification below 580 C (1,076 F) and low residence time without catalysts or an oxidizer can produce a char product that can contain carbon up to the amount of fixed carbon in the proximate analysis of the solids in the feed. This char can be burned with coal in an existing combustion system to provide the heat required for gasification. The new HRSG tubes can be retrofitted into existing power plant boilers for repowering of existing plants for improved performance and reduced costs. A special condensing turbine allows final low-temperature cleaning and maintains quality and combustibility of the fuel vapor for modern gas turbine in the new Vapor Transmission Cycle (VTC). Increased power output and efficiency can be provided for existing plants, while reducing fuel costs. A preliminary computer-based process simulation model has been prepared that includes material and energy balances that simulate commercial-scale operations of the VTC on sewage sludge and coal. Results predict over 40% HHV thermal efficiency to electric power from sewage sludge at more than 83% water by weight. The system appears to become autothermal (no supplemental fuel required) at about 35% fixed carbon in the feed. Thus, bituminous and lignite coal slurries could be gasified at less than 25% coal and more than 75% water. Preliminary life cycle cost analyses indicate that disposal fees for sewage sludge improve operating economics over fuel that must be purchased, the cost and schedule advantages of natural gas-fired combined cycle systems are preserved. Sensitivity analyses show that increasing capital costs by 50% can be offset by an increase in sewage sludge disposal fees of $10/metric ton.

  4. Active combustion flow modulation valve

    DOE Patents [OSTI]

    Hensel, John Peter; Black, Nathaniel; Thorton, Jimmy Dean; Vipperman, Jeffrey Stuart; Lambeth, David N; Clark, William W

    2013-09-24T23:59:59.000Z

    A flow modulation valve has a slidably translating hollow armature with at least one energizable coil wound around and fixably attached to the hollow armature. The energizable coil or coils are influenced by at least one permanent magnet surrounding the hollow armature and supported by an outer casing. Lorentz forces on the energizable coils which are translated to the hollow armature, increase or decrease the flow area to provide flow throttling action. The extent of hollow armature translation depends on the value of current supplied and the direction of translation depends on the direction of current flow. The compact nature of the flow modulation valve combined with the high forces afforded by the actuator design provide a flow modulation valve which is highly responsive to high-rate input control signals.

  5. Application of a geocentrifuge and sterolithographically fabricated apertures to multiphase flow in complex fracture apertures.

    SciTech Connect (OSTI)

    Glenn E. McCreery; Robert D. Stedtfeld; Alan T. Stadler; Daphne L. Stoner; Paul Meakin

    2005-09-01T23:59:59.000Z

    A geotechnical centrifuge was used to investigate unsaturated multiphase fluid flow in synthetic fracture apertures under a variety of flow conditions. The geocentrifuge subjected the fluids to centrifugal forces allowing the Bond number to be systematically changed without adjusting the fracture aperture of the fluids. The fracture models were based on the concept that surfaces generated by the fracture of brittle geomaterials have a self-affine fractal geometry. The synthetic fracture surfaces were fabricated from a transparent epoxy photopolymer using sterolithography, and fluid flow through the transparent fracture models was monitored by an optical image acquisition system. Aperture widths were chosen to be representative of the wide range of geological fractures in the vesicular basalt that lies beneath the Idaho Nation Laboratory (INL). Transitions between different flow regimes were observed as the acceleration was changed under constant flow conditions. The experiments showed the transition between straight and meandering rivulets in smooth walled apertures (aperture width = 0.508 mm), the dependence of the rivulet width on acceleration in rough walled fracture apertures (average aperture width = 0.25 mm), unstable meandering flow in rough walled apertures at high acceleration (20g) and the narrowing of the wetted region with increasing acceleration during the penetration of water into an aperture filled with wetted particles (0.875 mm diameter glass spheres).

  6. Analysis of ISO NE Balancing Requirements: Uncertainty-based Secure Ranges for ISO New England Dynamic Inerchange Adjustments

    SciTech Connect (OSTI)

    Etingov, Pavel V.; Makarov, Yuri V.; Wu, Di; Hou, Zhangshuan; Sun, Yannan; Maslennikov, S.; Luo, X.; Zheng, T.; George, S.; Knowland, T.; Litvinov, E.; Weaver, S.; Sanchez, E.

    2013-01-31T23:59:59.000Z

    The document describes detailed uncertainty quantification (UQ) methodology developed by PNNL to estimate secure ranges of potential dynamic intra-hour interchange adjustments in the ISO-NE system and provides description of the dynamic interchange adjustment (DINA) tool developed under the same contract. The overall system ramping up and down capability, spinning reserve requirements, interchange schedules, load variations and uncertainties from various sources that are relevant to the ISO-NE system are incorporated into the methodology and the tool. The DINA tool has been tested by PNNL and ISO-NE staff engineers using ISO-NE data.

  7. On emission permit auction vs. allocation and the structural adjustment of incumbent power generators in Australia

    SciTech Connect (OSTI)

    Simshauser, Paul

    2008-12-15T23:59:59.000Z

    A one-time partial allocation of permits would not impair the economic efficiency of the emissions trading scheme, would not have the effect of redirecting existing government expenditures, would minimize transaction costs, and most importantly, would help ensure power system stability throughout this major microeconomic reform. (author)

  8. Two-phase stratified flow regime transition analysis for low gravity conditions

    E-Print Network [OSTI]

    Miller, Kathryn M.

    1990-01-01T23:59:59.000Z

    the effect of the gas and liquid mass flow rates, fluid properties, pipe diameter, angle of pipe inclination, and gravity. Five basic flow regimes were considered: smooth stratified, wavy stratified, intermittent (slug and plug), annular with dispersed... Numerical Solution The premise used in this work for solving for the transition boundary is based on the assumption that the transition from the stratified regime to some other regime will occur when a very small wave exists on the surface of the liquid...

  9. Measurements of ship-induced flow and its effect on bank erosion

    E-Print Network [OSTI]

    Yu, Hongbin

    1997-01-01T23:59:59.000Z

    and Discussion C. Existing Models Review D. Modification of Model and Computation E. Boundary Layer Consideration . F. Comparisons with Field Measurements 12 12 15 19 25 30 TABLE OF CONTENTS (Continued) CHAPTER Page IV SHIP WAVES A. Description B... only considers flow parallel to the channel. The mea; surements indicate that passing barges may generate substantial flow perpendicular to the bank depending on the near-shore topography. Also, the model assumes a 25 uniform distribution...

  10. Load following capability of CANDLE reactor by adjusting coolant operation condition

    SciTech Connect (OSTI)

    Sekimoto, Hiroshi; Nakayama, Sinsuke [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology 2-12-1-N1-17, Ookayama, Meguro-ku 152-8550 (Japan)

    2012-06-06T23:59:59.000Z

    The load following capability of CANDLE reactor is investigated in the condition that the control rods are unavailable. Both sodium cooled metallic fuel fast reactor (SFR) and {sup 208}Pb cooled metallic fuel fast reactor (LFR) are investigated for their performance in power rate changing by changing its coolant operation condition; either coolant flow rate or coolant inlet temperature. The change by coolant flow rate is difficult especially for SFR because the maximum temperature criteria on cladding material may be violated. The power rate can be changed for its full range easily by changing the coolant temperature at the core inlet. LFR can reduce the same amount of power rate by smaller change of temperature than SFR. However, the coolant output temperature is generally decreased for this method and the thermal efficiency becomes worse.

  11. Subsurface Flow and Transport | EMSL

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

    subsurface related to contaminant transport, carbon cycling, enhanced oil recovery and carbon dioxide sequestration. See a complete list of Subsurface Flow and Transport...

  12. 4 Inventory of Existing Activities 4.1 Introduction, Purpose, and Scope

    E-Print Network [OSTI]

    249 4 Inventory of Existing Activities 4.1 Introduction, Purpose, and Scope The information what BPA has actually funded in the 2001-2003 period. Inventory of existing activities is a key element which represent each agency's role in the management of the subbasin. In addition, an inventory

  13. Existence of an Optimal Control for Stochastic Control Systems with Nonlinear Cost Functional

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Existence of an Optimal Control for Stochastic Control Systems with Nonlinear Cost Functional R reference stochastic system, is optimal for our stochastic control problem. Keywords: Backward stochastic on the coefficients of the forward and the backward equations we prove the existence of an optimal control

  14. Integration of Biomass processes in an existing Petrochemical ComplexPetrochemical Complex

    E-Print Network [OSTI]

    Pike, Ralph W.

    Integration of Biomass processes in an existing Petrochemical ComplexPetrochemical Complex Debalina · Biomass conversion processes · Integration in existing plant complex l i· Conclusions #12;Sustainability;Overview · Biomass based processes integrated into a chemical production complex. Utili b di id f i th l

  15. Department of Biological Engineering Fall 2012 Project Name Existing Building with Green Initiatives

    E-Print Network [OSTI]

    Demirel, Melik C.

    with Green Initiatives Overview The project was to take the existing building (30,000 sq.ft.) and soonPENNSTATE Department of Biological Engineering Fall 2012 Project Name ­ Existing Building to be built new addition (40,000 sq.ft.) and equip it with green initiates. Solar Innovations was interesting

  16. Evidence for the Existence of a Late-Metal Terminal Sulfido Complex

    E-Print Network [OSTI]

    Jones, William D.

    Evidence for the Existence of a Late-Metal Terminal Sulfido Complex David A. Vicic and William D be found throughout the literature, there exists no sound evidence for a terminal sulfido complex such as C the intermediacy of a terminal sulfido complex has been postulated,7 and there has been no experimental evidence

  17. On the existence of Markovian superquadratic BSDEs with an unbounded terminal condition

    E-Print Network [OSTI]

    On the existence of Markovian superquadratic BSDEs with an unbounded terminal condition Federica and the uniqueness of solutions to Markovian superquadratic BSDEs with an unbounded terminal condition when the generator and the terminal condition are locally Lipschitz. In this paper, we prove that the existence

  18. ON THE EXISTENCE OF STEADY PERIODIC CAPILLARY-GRAVITY STRATIFIED WATER WAVES

    E-Print Network [OSTI]

    points for steady water waves. The condition which ensures the lack of stagnation points for 1991ON THE EXISTENCE OF STEADY PERIODIC CAPILLARY-GRAVITY STRATIFIED WATER WAVES DAVID HENRY AND BOGDAN­VASILE MATIOC Abstract. We prove the existence of small steady periodic capillary-gravity water waves

  19. Probabilistic seismic risk analysis of existing buildings in regions with moderate seismicity

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Probabilistic seismic risk analysis of existing buildings in regions with moderate seismicity C to apply an approach based on risk for the seismic assessment of existing buildings. In this innovative analytical seismic assessment methods, as the ratio between the capacity and the requirement of the current

  20. Unbounded dynamics in dissipative flows: Rössler model

    SciTech Connect (OSTI)

    Barrio, Roberto, E-mail: rbarrio@unizar.es; Serrano, Sergio, E-mail: sserrano@unizar.es [Computational Dynamics Group, Dpto. Matemática Aplicada and IUMA, Universidad de Zaragoza, E-50009 Zaragoza (Spain)] [Computational Dynamics Group, Dpto. Matemática Aplicada and IUMA, Universidad de Zaragoza, E-50009 Zaragoza (Spain); Blesa, Fernando, E-mail: fblesa@unizar.es [Computational Dynamics Group, Dpto. Física Aplicada and IUMA, Universidad de Zaragoza, E-50009 Zaragoza (Spain)] [Computational Dynamics Group, Dpto. Física Aplicada and IUMA, Universidad de Zaragoza, E-50009 Zaragoza (Spain)

    2014-06-15T23:59:59.000Z

    Transient chaos and unbounded dynamics are two outstanding phenomena that dominate in chaotic systems with large regions of positive and negative divergences. Here, we investigate the mechanism that leads the unbounded dynamics to be the dominant behavior in a dissipative flow. We describe in detail the particular case of boundary crisis related to the generation of unbounded dynamics. The mechanism of the creation of this crisis in flows is related to the existence of an unstable focus-node (or a saddle-focus) equilibrium point and the crossing of a chaotic invariant set of the system with the weak-(un)stable manifold of the equilibrium point. This behavior is illustrated in the well-known Rössler model. The numerical analysis of the system combines different techniques as chaos indicators, the numerical computation of the bounded regions, and bifurcation analysis. For large values of the parameters, the system is studied by means of Fenichel's theory, providing formulas for computing the slow manifold which influences the evolution of the first stages of the orbit.

  1. Rényi entropy flows from quantum heat engines

    E-Print Network [OSTI]

    Mohammad H. Ansari; Yuli V. Nazarov

    2015-03-20T23:59:59.000Z

    We evaluate Renyi entropy flows from generic quantum heat engines (QHE) to a weakly-coupled probe environment kept in thermal equilibrium. We show that the flows are determined not only by heat flow but also by a quantum coherent flow that can be separately measured in experiment apart from the heat flow measurement. The same pertains to Shanon entropy flow. This appeals for a revision of the concept of entropy flows in quantum nonequlibrium thermodynamics.

  2. [AW] and L. Wang, Mathematical existence of crystal growth with Gibbs Thomson curvature effects, in preparation.

    E-Print Network [OSTI]

    Taylor, Jean

    , in preparation. [ATW1] F. J. Almgren, J. E. Taylor, and L. Wang, A variational approach to motion by weighted. Soc. (1992), 9­12. [ATW2] F. J. Almgren, J. E. Taylor, and L. Wang, Curvature Driven Flows

  3. Investigation of single-substance horizontal two-phase flow

    SciTech Connect (OSTI)

    Dickinson, D.A.; Maeder, P.F.

    1984-03-01T23:59:59.000Z

    Despite the abundance of work in the field of two-phase flow, it seems as though a consensus has not been reached on some of the fundamental points. Although exceptions exist, adequate physical interpretation of the flow seems to be hindered either by complexity of analysis or, in the opposite extreme, the trend toward limited-range analysis and correlations. The dissertation presents the derivation of basic conservation equations for the phases. The combined equations are used to examine the phenomenon of slip and its practical limitations, the Fanno line for single-substance flow and the effect of slip on choking. Equations for critical mass flux in the presence of slip are derived. The Mach, Reynolds and Froude numbers based on conditions at flashing are introduced as the characteristic parameters, and the importance of compressibility in single-substance two-phase flow is discussed. Experimental measurements of pressure change and void fraction for flow in the highly compressible range (.5 < Ma < 1) are presented. The working fluid is Refrigerant R-114, at room temperature, in a test section of diameter 5 cm and length 8 m. The effect of the Froude and Mach numbers is examined. The experimental facility is operated intermittently with running times of approximately two minutes and is instrumented for rapid measurements using a computer data acquisition and control system. A description of the facility and procedure is provided.

  4. On steady flows in smooth-walled magnetrons: Fundamental modes and no-cutoff flows in planar geometry

    SciTech Connect (OSTI)

    Goedecke, G.H.; Davis, Brian T.; Chen Chiping; Baker, C. Vincent [Physics Department, New Mexico State University, Las Cruces, New Mexico 88003 (United States)and Raytheon Missile Systems, 1151 E. Hermans Road, Tucson, Arizona 85706 (United States); Intense Beam Theoretical Research Group, Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States) and Raytheon Missile Systems, 1151 E. Hermans Road, Tucson, Arizona 85706 (United States); Raytheon Missile Systems, 1151 E. Hermans Road, Tucson, Arizona 85706 (United States)

    2005-11-15T23:59:59.000Z

    The Maxwell equations coupled with the ideal fluid equations for a warm isothermal non-neutral plasma are applied without approximation to predict three modes of time-independent electron flow in smooth-walled planar magnetrons, at any temperature. For all three modes, the equations predict that the fluid flow velocity tangent to the cathode is the Brillouin velocity. One of the modes is the well-known magnetic insulation mode, in which the magnetic field is larger than the Hull cutoff field [Phys. Rev. 18, 31 (1921)], the anode current is essentially zero, and virtually all the electrons reside in a sheath near the cathode. The other two modes exhibit fairly large anode currents. One of these modes is the well-known Child-Langmuir flow [Phys. Rev. 32, 492 (1911); ibid. 21, 419 (1923)], in which the magnetic field is smaller than the Hull cutoff field. The other high-current mode, in which the magnetic field is larger than the Hull cutoff field, has not been discussed previously; in this paper, it is called the 'no-cutoff' (NC) mode. Experiments using a thin smooth-walled magnetron were conducted, during which large anode currents were observed even for magnetic fields much larger than the Hull cutoff field. It is shown that NC mode parameters can be adjusted to produce a complete agreement with the experimental results, but that this requires the transverse flow velocity near the cathode to be superthermal and even mildly relativistic for the larger magnetic fields. Matching the experimental values also predicts a number density that is larger near the anode than near the cathode, but is small enough that space-charge effects are negligible in most cases.

  5. Assessment of net lost revenue adjustment mechanisms for utility DSM programs

    SciTech Connect (OSTI)

    Baxter, L.W.

    1995-01-01T23:59:59.000Z

    Utility shareholders can lose money on demand-side management (DSM) investments between rate cases. Several industry analysts argue that the revenues lost from utility DSM programs are an important financial disincentive to utility DSM investment. A key utility regulatory reform undertaken since 1989 allows utilities to recover the lost revenues incurred through successful operation of DSM programs. Explicitly defined net lost revenue adjustment (NLRA) mechanisms are states` preferred approach to lost revenue recovery from DSM programs. This report examines the experiences states and utilities are having with the NLRA approach. The report has three objectives. First, we determine whether NLRA is a feasible and successful approach to removing the lost-revenue disincentive to utility operation of DSM programs. Second, we identify the conditions linked to successful implementation of NLRA mechanisms in different states and assess whether NLRA has changed utility investment behavior. Third, we suggest improvements to NLRA mechanisms. We first identify states with NLRA mechanisms where utilities are recovering lost revenues from DSM programs. We interview staff at regulatory agencies in all these states and utility staff in four states. These interviews focus on the status of NLRA, implementation issues, DSM measurement issues, and NLRA results. We also analyze regulatory agency orders on NLRA, as well as associated testimony, reports, and utility lost revenue recovery filings. Finally, we use qualitative and quantitative indicators to assess NLRA`s effectiveness. Contrary to the concerns raised by some industry analysts, our results indicate NLRA is a feasible approach to the lost-revenue disincentive.

  6. 2007 Wholesale Power Rate Adjustment Proceeding (WP-07) : Administrator's Final Record of Decision.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2006-07-01T23:59:59.000Z

    This Record of Decision (ROD) contains the decisions of the Bonneville Power Administration (BPA), based on the record compiled in this rate proceeding, with respect to the adoption of power rates for the three-year rate period commencing October 1, 2006, through September 30, 2009. This ''2007 Wholesale Power Rate Adjustment Proceeding'' is designed to establish replacement rate schedules and General Rate Schedule Provisions (GRSPs) for those that expire on September 30, 2006. This power rate case also establishes the General Transfer Agreement (GTA) Delivery Charge for the period of October 1, 2007, through September 30, 2009. BPA's Power Subscription Strategy and Record of Decision (Subscription Strategy), as well as other Agency processes, provide much of the policy context for this rate case and are described in Section 2. This ROD follows a full evidentiary hearing and briefing, including an Oral Argument before the BPA Administrator. Sections 3 through 18, including any appendices or attachments, present the issues raised by parties in this proceeding, the parties positions, BPA staff positions on the issues, BPA's evaluations of the positions, and the Administrator's decisions. Parties had the opportunity to file briefs on exceptions to the Draft ROD, before issuance of this Final Record of Decision.

  7. Designing, implementing and monitoring social impact mitigation strategies: Lessons from Forest Industry Structural Adjustment Packages

    SciTech Connect (OSTI)

    Loxton, Edwina A., E-mail: Edwina.Loxton@anu.edu.au [Fenner School of Environment and Society, The Australian National University, Canberra, 0200 (Australia); Schirmer, Jacki, E-mail: Jacki.Schirmer@canberra.edu.au [Fenner School of Environment and Society, The Australian National University, Canberra, 0200 (Australia) [Fenner School of Environment and Society, The Australian National University, Canberra, 0200 (Australia); Cooperative Research Centre for Forestry, Hobart, 7001 (Australia); Kanowski, Peter, E-mail: P.Kanowski@cgiar.org [Fenner School of Environment and Society, The Australian National University, Canberra, 0200 (Australia) [Fenner School of Environment and Society, The Australian National University, Canberra, 0200 (Australia); Cooperative Research Centre for Forestry, Hobart, 7001 (Australia)

    2013-09-15T23:59:59.000Z

    Social impact mitigation strategies are implemented by the proponents of policies and projects with the intent of reducing the negative, and increasing the positive social impacts of their activities, and facilitating the achievement of policy/project goals. Evaluation of mitigation strategies is critical to improving their future success and cost-effectiveness. This paper evaluates two Forest Industry Structural Adjustment Packages (FISAP) implemented in Australia in the 1990s to 2000s as part of broader policy changes that reduced access to timber from publicly owned native forests. It assesses the effectiveness of the structure, design, implementation and monitoring of the FISAPs, and highlights the interactions between these four elements and their influence on social impacts. The two FISAPs were found to be effective in terms of reducing negative impacts, encouraging positive impacts and contributing towards policy goals, although they did not mitigate negative impacts in all cases, and sometimes interacted with external factors and additional policy changes to contribute to significant short and long term negative impacts. -- Highlights: ? Mitigation strategies aim to reduce negative and enhance positive social impacts ? Mitigation strategy design, implementation, and monitoring are critical to success ? Effective mitigation enhanced the capacity of recipients to respond to change ? Mitigation strategies influenced multiple interacting positive and negative impacts ? Success required good communication, transparency, support, resources and timing.

  8. UPDATING THE FREIGHT TRUCK STOCK ADJUSTMENT MODEL: 1997 VEHICLE INVENTORY AND USE SURVEY DATA

    SciTech Connect (OSTI)

    Davis, S.C.

    2000-11-16T23:59:59.000Z

    The Energy Information Administration's (EIA's) National Energy Modeling System (NEMS) Freight Truck Stock Adjustment Model (FTSAM) was created in 1995 relying heavily on input data from the 1992 Economic Census, Truck Inventory and Use Survey (TIUS). The FTSAM is part of the NEMS Transportation Sector Model, which provides baseline energy projections and analyzes the impacts of various technology scenarios on consumption, efficiency, and carbon emissions. The base data for the FTSAM can be updated every five years as new Economic Census information is released. Because of expertise in using the TIUS database, Oak Ridge National Laboratory (ORNL) was asked to assist the EIA when the new Economic Census data were available. ORNL provided the necessary base data from the 1997 Vehicle Inventory and Use Survey (VIUS) and other sources to update the FTSAM. The next Economic Census will be in the year 2002. When those data become available, the EIA will again want to update the FTSAM using the VIUS. This report, which details the methodology of estimating and extracting data from the 1997 VIUS Microdata File, should be used as a guide for generating the data from the next VIUS so that the new data will be as compatible as possible with the data in the model.

  9. Comparison of Two Foreign Body Retrieval Devices with Adjustable Loops in a Swine Model

    SciTech Connect (OSTI)

    Konya, Andras [University of Texas M. D. Anderson Cancer Center, Section of Interventional Radiology, Division of Diagnostic Imaging (United States)], E-mail: akonya@mdanderson.org

    2006-12-15T23:59:59.000Z

    The purpose of the study was to compare two similar foreign body retrieval devices, the Texan{sup TM} (TX) and the Texan LONGhorn{sup TM} (TX-LG), in a swine model. Both devices feature a {<=}30-mm adjustable loop. Capture times and total procedure times for retrieving foreign bodies from the infrarenal aorta, inferior vena cava, and stomach were compared. All attempts with both devices (TX, n = 15; TX-LG, n = 14) were successful. Foreign bodies in the vasculature were captured quickly using both devices (mean {+-} SD, 88 {+-} 106 sec for TX vs 67 {+-} 42 sec for TX-LG) with no significant difference between them. The TX-LG, however, allowed significantly better capture times than the TX in the stomach (p = 0.022), Overall, capture times for the TX-LG were significantly better than for the TX (p = 0.029). There was no significant difference between the total procedure times in any anatomic region. TX-LG performed significantly better than the TX in the stomach and therefore overall. The better torque control and maneuverability of TX-LG resulted in better performance in large anatomic spaces.

  10. On the postglacial isostatic adjustment of the British Isles and the shallow viscoelastic structure of the Earth

    E-Print Network [OSTI]

    Peltier, W. Richard

    of the Earth W. R. Peltier,1 I. Shennan,2 R. Drummond1 and B. Horton2 1 Department of Physics, University viscoelastic theory of the glacial isostatic adjustment (GIA) process, most recently reviewed in Peltier (1998a on the inverse problem for mantle viscosity (see the papers by Peltier 1998b and Wieczerkowski et al. 1999

  11. Post-traumatic stress symptons, college adjustment, and drug use in response to trauma and the September 11th attacks

    E-Print Network [OSTI]

    Reck, Jennifer Kaye

    2013-02-22T23:59:59.000Z

    who are far-removed from an event can experience PTSD symptoms. Trauma has also been found to make adjustment to college more difficult and increase drug and alcohol use. Previous trauma can also adversely affect one's reaction to traumatic events...

  12. Comparing Two Types of Magnetically- Coupled Adjustable Speed Drives with Variable Frequency Drives in Pump and Fan Applications

    E-Print Network [OSTI]

    Anderson, K. J.; Chvala, W. D.

    This paper presents the results from laboratory tests on MagnaDrive Corporations fixed-magnet magnetically-coupled adjustable speed drive (MC-ASD) and Coyote Electronics electromagnetic MC-ASD as compared to a typical variable frequency drive (VFD...

  13. Electronic copy available at: http://ssrn.com/abstract=2065816 Ultimate Ownership Structure and Bank Regulatory Capital Adjustment

    E-Print Network [OSTI]

    Boyer, Edmond

    their capital structure (debt/equity), firms in general and banks more specifically take control dilution costs into consideration, beyond the asymmetric information and transaction costs considered in prior research on capital and Bank Regulatory Capital Adjustment: Evidence from European Commercial Banks Laetitia Lepetita , Amine

  14. Instructions and Data Form for Local Authority Having Jurisdiction to Submit Adjustments to Default Outdoor Lighting Zones

    E-Print Network [OSTI]

    Outdoor Lighting Zones Adjustments to Default Outdoor Lighting Zones A local Authority Having Jurisdiction (AHJ) may officially adopt changes to the default Outdoor Lighting Zone designation of an area the proposed change. For example, the AHJ may determine areas where Outdoor Lighting Zone 4 is applicable

  15. Chlorophyll antenna size adjustments by irradiance in Dunaliella salina involve coordinate regulation of chlorophyll a oxygenase (CAO)

    E-Print Network [OSTI]

    Chlorophyll antenna size adjustments by irradiance in Dunaliella salina involve coordinate and that of the Lhcb genes in the model organism Dunaliella salina. Among the chlorophyll biosynthesis enzymes tested are a dynamic compensation response (Melis, 1996; 1998). When HL-acclimated cells of D. salina were shifted

  16. The influence of phosphorus nutrition and water stress on the osmotic adjustment and growth of loblolly pine

    E-Print Network [OSTI]

    Wilson, Alan Byron

    1985-01-01T23:59:59.000Z

    LITERATURE REVIEW Water Stress Osmotic Adjustment Phosphorus MATERIALS AND METHODS Experimental Design Sowing Preparation Sowing and Seedling Cultivation Treatments . . . . . . . ~ Measurements . . . . . . - ~ ~ ~ Statistical Analysis RESULTS... three days. Fertilizer was applied every other time the seedlings received water. Treatments were initiated to provide three levels of phos- phorus nutrition (10, 100, 200 ppm) and three levels of water stress. Water stress was imposed...

  17. Local Load Analysis with Periodic Time Series and Temperature Adjustment Marcelo Espinoza, Bart De Moor Caroline Joye Ronnie Belmans

    E-Print Network [OSTI]

    Time Series, Load Profiles, Temperature Sensitivity, Weather Adjustment 1 Introduction The quantitative, it is required to use indirect techniques to assess the type of demand they face [10, 11] in order to support their long-term investment planning. In this context, categories of residential, business and in- dustrial

  18. Review and selection of unsaturated flow models

    SciTech Connect (OSTI)

    NONE

    1993-09-10T23:59:59.000Z

    Under the US Department of Energy (DOE), the Civilian Radioactive Waste Management System Management and Operating Contractor (CRWMS M&O) has the responsibility to review, evaluate, and document existing computer ground-water flow models; to conduct performance assessments; and to develop performance assessment models, where necessary. In the area of scientific modeling, the M&O CRWMS has the following responsibilities: To provide overall management and integration of modeling activities. To provide a framework for focusing modeling and model development. To identify areas that require increased or decreased emphasis. To ensure that the tools necessary to conduct performance assessment are available. These responsibilities are being initiated through a three-step process. It consists of a thorough review of existing models, testing of models which best fit the established requirements, and making recommendations for future development that should be conducted. Future model enhancement will then focus on the models selected during this activity. Furthermore, in order to manage future model development, particularly in those areas requiring substantial enhancement, the three-step process will be updated and reported periodically in the future.

  19. Particle seeding flow system for horizontal shock tube

    SciTech Connect (OSTI)

    Johnston, Stephen [Los Alamos National Laboratory; Garcia, Nicolas J. [Los Alamos National Laboratory; Martinez, Adam A. [Los Alamos National Laboratory; Orlicz, Gregory C. [Los Alamos National Laboratory; Prestridge, Katherine P. [Los Alamos National Laboratory

    2012-08-01T23:59:59.000Z

    The Extreme Fluids Team in P-23, Physics Division, studies fluid dynamics at high speeds using high resolution diagnostics. The unsteady forces on a particle driven by a shock wave are not well understood, and they are difficult to model. A horizontal shock tube (HST) is being modified to collect data about the behavior of particles accelerated by shocks. The HST has been used previously for studies of Richtmyer-Meshkov instability using Planar Laser-Induced Fluorescence (PLIF) as well as Particle Image Velocimetry (PIV), diagnostics that measure density and velocity. The purpose of our project is to design a flow system that will introduce particles into the HST. The requirements for this particle flow system (PFS) are that it be non-intrusive, be able to introduce either solid or liquid particles, have an exhaust capability, not interfere with existing diagnostics, and couple with the existing HST components. In addition, the particles must flow through the tube in a uniform way. We met these design criteria by first drawing the existing shock tube and diagnostics and doing an initial design of the ducts for the PFS. We then estimated the losses through the particle flow system from friction and researched possible fans that could be used to drive the particles. Finally, the most challenging component of the design was the coupling to the HST. If we used large inlets, the shock would lose strength as it passed by the inlet, so we designed a novel coupling inlet and outlet that minimize the losses to the shock wave. Our design was reviewed by the Extreme Fluids Team, and it is now being manufactured and built based upon our technical drawings.

  20. Network Flow Optimization under Uncertainty

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    Network model in words Minimize the cost of satisfying demands for electric energy By: imports, exports and electricity Subject to: conservation of energy flows (net after losses), lower and upper bounds on flows is a reactive approach: how would the optimal solution have changed if I'd only known? · Proactive approaches

  1. Redox Flow Batteries, a Review

    SciTech Connect (OSTI)

    U. Tennessee Knoxville; U. Texas Austin; McGill U; Weber, Adam Z.; Mench, Matthew M.; Meyers, Jeremy P.; Ross, Philip N.; Gostick, Jeffrey T.; Liu, Qinghua

    2011-07-15T23:59:59.000Z

    Redox flow batteries are enjoying a renaissance due to their ability to store large amounts of electrical energy relatively cheaply and efficiently. In this review, we examine the components of redox flow batteries with a focus on understanding the underlying physical processes. The various transport and kinetic phenomena are discussed along with the most common redox couples.

  2. Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers

    SciTech Connect (OSTI)

    Bradley Adams; Andrew Fry; Constance Senior; Hong Shim; Huafeng Wang; Jost Wendt; Christopher Shaddix

    2009-06-30T23:59:59.000Z

    This report summarizes Year 1 results of a research program designed to use multi-scale experimental studies and fundamental theoretical models to characterize and predict the impacts of retrofit of existing coal-fired utility boilers for oxy-combustion. Through the course of Year 1 activities, great progress was made toward understanding the issues associated with oxy-combustion retrofit of coal-fired boilers. All four Year 1 milestones and objectives have been, or will be, completed on schedule and within budget. Progress in the four milestone areas may be summarized as follows: • University of Utah has performed size segregated ash composition measurements in the Oxy-Fuel Combustor (OFC). These experiments indicate that oxy-combustion retrofit may impact ash aerosol mineral matter composition. Both flame temperature and flue gas composition have been observed to influence the concentration of calcium, magnesium and iron in the fine particulate. This could in turn impact boiler fouling and slagging. • Sandia National Labs has shown that char oxidation rate is dependent on particle size (for sizes between 60 and 100 microns) by performing fundamental simulations of reacting char particles. These predictions will be verified by making time-resolved optical measurements of char particle temperature, velocity and size in bench-scale experiments before the end of Year 1. • REI and Siemens have completed the design of an oxy-research burner that will be mounted on University of Utah’s pilot-scale furnace, the L1500. This burner will accommodate a wide range of O2, FGR and mixing strategies under conditions relevant for utility boiler operation. Through CFD modeling of the different burner designs, it was determined that the key factor influencing flame stabilization location is particle heat-up rate. The new oxy-research burner and associated equipment is scheduled for delivery before the end of Year 1. • REI has completed a literature survey of slagging and fouling mechanisms in coal-fired power plants to understand key issues influencing these deposition regimes and infer their behavior under oxy-fired conditions. Based on the results of this survey, an algorithm for integrating slagging predictions into CFD models was outlined. This method accounts for ash formation, particle impaction and sticking, deposit growth and physical properties and impact of the deposit on system flow and heat transfer. A model for fouling in the back pass has also been identified which includes vaporization of sodium, deposition of sodium sulfate on fly ash particles and tube surfaces, and deposit growth rate on tubes. In Year 1, REI has also performed a review of the literature describing corrosion in order to understand the behavior of oxidation, sulfidation, chloridation, and carburization mechanisms in air-fired and oxy-combustion systems. REI and Vattenfall have met and exchanged information concerning oxy-coal combustion mechanisms for CFD simulations currently used by Vattenfall. In preparation for Year 2 of this program, two coals (North Antelope PRB, Western bituminous) have been ordered, pulverized and delivered to the University of Utah and Sandia National Labs. Materials for the corrosion experiments have been identified, suppliers located, and a schedule for equipment fabrication and shakedown has been established. Finally, a flue gas recycle system has been designed and is being constructed for the OFC.

  3. Apparatus for passive removal of subsurface contaminants and mass flow measurement

    DOE Patents [OSTI]

    Jackson, Dennis G. (Augusta, GA); Rossabi, Joseph (Aiken, SC); Riha, Brian D. (Augusta, GA)

    2003-07-15T23:59:59.000Z

    A system for improving the Baroball valve and a method for retrofitting an existing Baroball valve. This invention improves upon the Baroball valve by reshaping the interior chamber of the valve to form a flow meter measuring chamber. The Baroball valve sealing mechanism acts as a rotameter bob for determining mass flow rate through the Baroball valve. A method for retrofitting a Baroball valve includes providing static pressure ports and connecting a measuring device, to these ports, for measuring the pressure differential between the Baroball chamber and the well. A standard curve of nominal device measurements allows the mass flow rate to be determined through the retrofitted Baroball valve.

  4. Apparatus for passive removal of subsurface contaminants and volume flow measurement

    DOE Patents [OSTI]

    Jackson, Dennis G. (Augusta, GA); Rossabi, Joseph (Aiken, SC); Riha, Brian D. (Augusta, GA)

    2002-01-01T23:59:59.000Z

    A system for improving the Baroball valve and a method for retrofitting an existing Baroball valve. This invention improves upon the Baroball valve by reshaping the interior chamber of the valve to form a flow meter measuring chamber. The Baroball valve sealing mechanism acts as a rotameter bob for determining volume flow rate through the Baroball valve. A method for retrofitting a Baroball valve includes providing static pressure ports and connecting a measuring device, to these ports, for measuring the pressure differential between the Baroball chamber and the well. A standard curve of nominal device measurements allows the volume flow rate to be determined through the retrofitted Baroball valve.

  5. Streamline topology and dilute particle dynamics in a Karman vortex street flow

    E-Print Network [OSTI]

    Wu, Z B

    2003-01-01T23:59:59.000Z

    Three types of streamline topology in a Karman vortex street flow are shown under the variation of spatial parameters. For the motion of dilute particles in the K\\'arm\\'an vortex street flow, there exist a route of bifurcation to a chaotic orbit and more attractors in a bifurcation diagram for the proportion of particle density to fluid density. Along with the increase of spatial parameters in the flow filed, the bifurcation process is suspended, as well as more and more attractors emerge. In the motion of dilute particles, a drag term and gravity term dominate and result in the bifurcation phenomenon.

  6. Wavy flow cooling concept for turbine airfoils

    DOE Patents [OSTI]

    Liang, George (Palm City, FL)

    2010-08-31T23:59:59.000Z

    An airfoil including an outer wall and a cooling cavity formed therein. The cooling cavity includes a leading edge flow channel located adjacent a leading edge of the airfoil and a trailing edge flow channel located adjacent a trailing edge of the airfoil. Each of the leading edge and trailing edge flow channels define respective first and second flow axes located between pressure and suction sides of the airfoil. A plurality of rib members are located within each of the flow channels, spaced along the flow axes, and alternately extending from opposing sides of the flow channels to define undulating flow paths through the flow channels.

  7. Vertical flow chemical detection portal

    DOE Patents [OSTI]

    Linker, K.L.; Hannum, D.W.; Conrad, F.J.

    1999-06-22T23:59:59.000Z

    A portal apparatus is described for screening objects or persons for the presence of trace amounts of chemical substances such as illicit drugs or explosives. The apparatus has a test space, in which a person may stand, defined by two generally upright sides spanned by a horizontal transom. One or more fans in the transom generate a downward air flow (uni-directional) within the test space. The air flows downwardly from a high pressure upper zone, past the object or person to be screened. Air moving past the object dislodges from the surface thereof both volatile and nonvolatile particles of the target substance. The particles are entrained into the air flow which continues flowing downward to a lower zone of reduced pressure, where the particle-bearing air stream is directed out of the test space and toward preconcentrator and detection components. The sides of the portal are specially configured to partially contain and maintain the air flow. 3 figs.

  8. The flow and heat transfer in a viscous fluid over an unsteady stretching surface

    E-Print Network [OSTI]

    Ene, Remus-Daniel; Marinca, Bogdan

    2015-01-01T23:59:59.000Z

    In this paper we have studied the flow and heat transfer in a viscous fluid by a horizontal sheet. The stretching rate and temperature of the sheet vary with time. The governing equations for momentum and thermal energy are reduced to ordinary differential equations by means of similarity transformation. These equations are solved approximately by means of the Optimal Homotopy Asymptotic Method (OHAM) which provides us with a convenient way to control the convergence of approximation solutions and adjust convergence rigorous when necessary. Some examples are given and the results obtained reveal that the proposed method is effective and easy to use.

  9. Recurrent flow analysis in spatiotemporally chaotic 2-dimensional Kolmogorov flow

    E-Print Network [OSTI]

    Dan Lucas; Rich Kerswell

    2015-04-01T23:59:59.000Z

    Motivated by recent success in the dynamical systems approach to transitional flow, we study the efficiency and effectiveness of extracting simple invariant sets (recurrent flows) directly from chaotic/turbulent flows and the potential of these sets for providing predictions of certain statistics of the flow. Two-dimensional Kolmogorov flow (the 2D Navier-Stokes equations with a sinusoidal body force) is studied both over a square [0, 2{\\pi}]2 torus and a rectangular torus extended in the forcing direction. In the former case, an order of magnitude more recurrent flows are found than previously (Chandler & Kerswell 2013) and shown to give improved predictions for the dissipation and energy pdfs of the chaos via periodic orbit theory. Over the extended torus at low forcing amplitudes, some extracted states mimick the statistics of the spatially-localised chaos present surprisingly well recalling the striking finding of Kawahara & Kida (2001) in low-Reynolds-number plane Couette flow. At higher forcing amplitudes, however, success is limited highlighting the increased dimensionality of the chaos and the need for larger data sets. Algorithmic developments to improve the extraction procedure are discussed.

  10. Flow Rate Measurements Using Flow-Induced Pipe Vibration

    SciTech Connect (OSTI)

    R. P. Evans; Jonathan D. Blotter; Alan G. Stephens

    2004-03-01T23:59:59.000Z

    This paper focuses on the possibility of a non-intrusive, low cost, flow rate measurement technique. The technique is based on signal noise from an accelerometer attached to the surface of the pipe. The signal noise is defined as the standard deviation of the frequency averaged time series signal. Experimental results are presented that indicate a nearly quadratic relationship between the signal noise and mass flow rate in the pipe. It is also shown that the signal noise - flow rate relationship is dependant on the pipe material and diameter.

  11. US energy flow - 1984

    SciTech Connect (OSTI)

    Briggs, C.K.; Borg, I.Y.

    1985-07-01T23:59:59.000Z

    The 1984 energy flow diagram for the USA has been constructed using Department of Energy data. It is a convenient graphical device to show supply and demand as well as the size of end-use sectors. A 4% increase in overall energy consumption represented a reversal in a downward trend started in 1979. All indicators pointed to more healthy industrial and farm economies in 1984 than in the previous two years, which accounted for some part of the increase in energy use. While domestic crude oil production remained stable, oil imports rose eight percent also reversing a long-standing trend. Seventy-two million barrels of oil primarily from Mexico and the United Kingdom were added to the Strategic Petroleum Reserve bringing the total oil stored at year end to 451 million barrels. At the same time 49 million barrels of oil were produced from the government-owned Naval Petroleum Reserve No. 1 (Elk Hills, CA). Energy use in all end-use sectors grew in 1984 which is in keeping with increases in use of all types of fossil fuels as well as electricity. Increase in electrical power demand continued to exceed forecasts, and during 1984 contracts for imports to the northeast US were negotiated with Canada. Nuclear power contributed 15% of total power generated in the US. At year end there were 86 licensed reactors and 44 in either start-up or construction stages. Six were canceled or abandoned during construction during the year. 11 refs., 4 figs., 3 tabs.

  12. For Energy Conservation in Existing Plants - Start With a Good Process Survey

    E-Print Network [OSTI]

    Krebs, N. R.; Castillo, R. O.; Malaty, W.

    1982-01-01T23:59:59.000Z

    As a result of the drastic increase in the cost of process plant utilities, many operating companies are actively pursuing programs to effect energy conservation in their existing plants. Some have taken action to reduce the outright waste of energy...

  13. It Pays to Modify Existing Crude Preheat Trains to Conserve More Energy!

    E-Print Network [OSTI]

    Feintuch, H. M.; Peer, V.; Wong, W. H.

    1982-01-01T23:59:59.000Z

    called EXTRA (EXchanger TRAin) which can be used to determine which modifications to an existing crude preheat train will be most effective in economically recovering additional waste heat. The program can rigorously develop temperature profiles and heat...

  14. Hawaii Clean Energy Initiative Existing Building Energy Efficiency Analysis: November 17, 2009- June 30, 2010

    Office of Energy Efficiency and Renewable Energy (EERE)

    This report presents the results of the Booz Allen Hamilton study on the existing building stock of Hawaii, along with conclusions on the key drivers of potential energy efficiency savings and on the steps necessary to attain them.

  15. Assessing the Effects of a Program to Promote Energy-Efficiency Upgrades in Existing Homes

    E-Print Network [OSTI]

    Lee, A.; Larkin, J.; Gobris, M. K.; Boughen, S.; Staples, J.

    2002-01-01T23:59:59.000Z

    Energy efficient mortgages (EEMs) are intended to mitigate some of the financial barriers to upgrading the energy efficiency of existing (and sometimes new) houses. The Time of Sale Energy Renovation Program (TOSER) is designed to overcome key...

  16. Modeling the Transport Sector: The Role of Existing Fuel Taxes in Climate Policy

    E-Print Network [OSTI]

    Paltsev, Sergey.

    Existing fuel taxes play a major role in determining the welfare effects of exempting the transportation sector from measures to control greenhouse gases. To study this phenomenon we modify the MIT Emissions Prediction and ...

  17. The number of multimedia transmissions over the existing network infrastructure is continually increasing.

    E-Print Network [OSTI]

    ABSTRACT The number of multimedia transmissions over the existing network infrastructure and hence their play- out. We propose a novel feedback controlled multimedia transmission scheme in order are being transferred between remotely situated computers. Multimedia transmissions, especially of a real

  18. Review on Persistence of Commissioning Benefits in New and Existing Buildings

    E-Print Network [OSTI]

    Toole, C.; Claridge, D. E.

    2006-01-01T23:59:59.000Z

    In recent years the topic of persistence of benefits has gained more interest both for existing building retrocommissioning and new building commissioning. This topic is relatively new, and the only relevant projects identified in the literature...

  19. Analysis of Alternative Extensions of the Existing Production Tax Credit for Wind Generators

    Reports and Publications (EIA)

    2007-01-01T23:59:59.000Z

    Requestor: Ms. Janice Mays, Chief Counsel, Committee on Ways & Means, U.S. House of Representatives This is a letter response requesting analysis of alternative extensions of the existing production tax credit (PTC) that would apply to wind generators only.

  20. New and Existing Buildings Heating and Cooling Opportunities: Dedicated Heat Recovery Chiller

    Broader source: Energy.gov [DOE]

    Presentation covers the new and existing buildings heating and cooling opportunities and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.