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1

Wind effects on large-scale buildings and structures : field measurements, wind tunnel tests and numerical prediction.  

E-Print Network [OSTI]

??Modern large-scale buildings and structures, such as super tall buildings and large roof structures, are usually constructed with innovative structural systems and high strength materials;… (more)

Fu, Jiyang (???)

2007-01-01T23:59:59.000Z

2

POWER SYSTEMS STABILITY WITH LARGE-SCALE WIND POWER PENETRATION  

E-Print Network [OSTI]

of offshore wind farms, wind power fluctuations may introduce several challenges to reliable power system behaviour due to natural wind fluctuations. The rapid power fluctuations from the large scale wind farms Generation Control (AGC) system which includes large- scale wind farms for long-term stability simulation

Bak-Jensen, Birgitte

3

Large-Scale Wind Training Program  

SciTech Connect (OSTI)

Project objective is to develop a credit-bearing wind technician program and a non-credit safety training program, train faculty, and purchase/install large wind training equipment.

Porter, Richard L. [Hudson Valley Community College

2013-07-01T23:59:59.000Z

4

Superconductivity for Large Scale Wind Turbines  

SciTech Connect (OSTI)

A conceptual design has been completed for a 10MW superconducting direct drive wind turbine generator employing low temperature superconductors for the field winding. Key technology building blocks from the GE Wind and GE Healthcare businesses have been transferred across to the design of this concept machine. Wherever possible, conventional technology and production techniques have been used in order to support the case for commercialization of such a machine. Appendices A and B provide further details of the layout of the machine and the complete specification table for the concept design. Phase 1 of the program has allowed us to understand the trade-offs between the various sub-systems of such a generator and its integration with a wind turbine. A Failure Modes and Effects Analysis (FMEA) and a Technology Readiness Level (TRL) analysis have been completed resulting in the identification of high risk components within the design. The design has been analyzed from a commercial and economic point of view and Cost of Energy (COE) calculations have been carried out with the potential to reduce COE by up to 18% when compared with a permanent magnet direct drive 5MW baseline machine, resulting in a potential COE of 0.075 $/kWh. Finally, a top-level commercialization plan has been proposed to enable this technology to be transitioned to full volume production. The main body of this report will present the design processes employed and the main findings and conclusions.

R. Fair; W. Stautner; M. Douglass; R. Rajput-Ghoshal; M. Moscinski; P. Riley; D. Wagner; J. Kim; S. Hou; F. Lopez; K. Haran; J. Bray; T. Laskaris; J. Rochford; R. Duckworth

2012-10-12T23:59:59.000Z

5

Generation of large-scale winds in horizontally anisotropic convection  

E-Print Network [OSTI]

We simulate three-dimensional, horizontally periodic Rayleigh-B\\'enard convection between free-slip horizontal plates, rotating about a horizontal axis. When both the temperature difference between the plates and the rotation rate are sufficiently large, a strong horizontal wind is generated that is perpendicular to both the rotation vector and the gravity vector. The wind is turbulent, large-scale, and vertically sheared. Horizontal anisotropy, engendered here by rotation, appears necessary for such wind generation. Most of the kinetic energy of the flow resides in the wind, and the vertical turbulent heat flux is much lower on average than when there is no wind.

von Hardenberg, J; Provenzale, A; Spiegel, E A

2015-01-01T23:59:59.000Z

6

LARGE SCALE WIND CLIMATOLOGICAL EXAMINATIONS OF WIND ENERGY UTILIZATION  

E-Print Network [OSTI]

The aim of this article is to describe the particular field of climatology which analyzes air movement characteristics regarding utilization of wind for energy generation. The article describes features of wind energy potential available in Hungary compared to wind conditions in other areas of the northern quarter sphere in order to assist the wind energy use development in Hungary. Information on wind climate gives a solid basis for financial and economic decisions of stakeholders in the field of wind energy utilization.

Andrea Kircsi

7

Optimal Selection of AC Cables for Large Scale Offshore Wind Farms  

E-Print Network [OSTI]

Optimal Selection of AC Cables for Large Scale Offshore Wind Farms Peng Hou, Weihao Hu, Zhe Chen@et.aau.dk, whu@iet.aau.dk, zch@iet.aau.dk Abstract--The investment of large scale offshore wind farms is high the operational requirements of the offshore wind farms and the connected power systems. In this paper, a new cost

Hu, Weihao

8

Large Scale Wind Turbine Siting Map Report NJ Department of Environmental Protection  

E-Print Network [OSTI]

Large Scale Wind Turbine Siting Map Report NJ Department of Environmental Protection September 8 Jersey Department of Environmental Protection's (NJDEP) "Large Scale Wind Turbine Siting Map Management rules to address the development and permitting of wind turbines in the coastal zone

Holberton, Rebecca L.

9

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

E-Print Network [OSTI]

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over on Wind Energy Resource over Europe and its Intermittency Pascal Kriesche* and Adam Schlosser* Abstract

10

Potential Climatic Impacts and Reliability of Very Large-Scale Wind Farms  

E-Print Network [OSTI]

Meeting future world energy needs while addressing climate change requires large-scale deployment of low or zero greenhouse gas (GHG) emission technologies such as wind energy. The widespread availability of wind power has ...

Wang, Chien

11

Impacts of Large-Scale Wind Generators Penetration on the Voltage Stability of Power Systems  

E-Print Network [OSTI]

development of wind energy tech- nology and the current world-wide status of grid-connected as well as standImpacts of Large-Scale Wind Generators Penetration on the Voltage Stability of Power Systems M. J systems and their dynamic behaviours to identify critical issues that limit the large-scale integration

Pota, Himanshu Roy

12

Large-scale structure of the fast solar wind  

E-Print Network [OSTI]

measurements of Solar Wind velocity, in press, Journal of1992), The Ulysses solar wind plasma experiment, AstronomyA. Hewish (1967), The solar wind outside the plane of the

Bisi, M. M.; Fallows, R. A.; Breen, A. R.; Habbal, S. Rifai; Jones, R. A.

2007-01-01T23:59:59.000Z

13

Effects of large-scale distribution of wind energy in and around Europe  

E-Print Network [OSTI]

Effects of large-scale distribution of wind energy in and around Europe Gregor Giebel Niels Gylling energy in Europe? · Distribution of wind energy all over Europe leads to smoothing of the wind power energy can easily supply up to ~20% of the European demand. At this stage, · Less than 13% of the wind

14

Prospects for large scale applications of wind energy  

E-Print Network [OSTI]

generating wind turbine (1885) Historical development #12;20th century: first electricity generation USA: electricity generation DK: Gedser (1975) NL: De Traanroeier (1956) D: Hütter (1959) Historical development #12's share of the World-Wide Generation Generation Electricity gen. Electricity from all Wind Power's share

15

Large-scale hierarchical optimization for online advertising and wind farm planning  

E-Print Network [OSTI]

Large-scale hierarchical optimization for online advertising and wind farm planning Konstantin Konstantin Salomatin #12;Keywords: online advertising, sponsored search, wind energy, layout optimization (particularly, spon- sored search) and wind farm turbine-layout planning. Whereas very different in specifics

Eskenazi, Maxine

16

Large-Scale Spray Releases: Additional Aerosol Test Results  

SciTech Connect (OSTI)

One of the events postulated in the hazard analysis for the Waste Treatment and Immobilization Plant (WTP) and other U.S. Department of Energy (DOE) nuclear facilities is a breach in process piping that produces aerosols with droplet sizes in the respirable range. The current approach for predicting the size and concentration of aerosols produced in a spray leak event involves extrapolating from correlations reported in the literature. These correlations are based on results obtained from small engineered spray nozzles using pure liquids that behave as a Newtonian fluid. The narrow ranges of physical properties on which the correlations are based do not cover the wide range of slurries and viscous materials that will be processed in the WTP and in processing facilities across the DOE complex. To expand the data set upon which the WTP accident and safety analyses were based, an aerosol spray leak testing program was conducted by Pacific Northwest National Laboratory (PNNL). PNNL’s test program addressed two key technical areas to improve the WTP methodology (Larson and Allen 2010). The first technical area was to quantify the role of slurry particles in small breaches where slurry particles may plug the hole and prevent high-pressure sprays. The results from an effort to address this first technical area can be found in Mahoney et al. (2012a). The second technical area was to determine aerosol droplet size distribution and total droplet volume from prototypic breaches and fluids, including sprays from larger breaches and sprays of slurries for which literature data are mostly absent. To address the second technical area, the testing program collected aerosol generation data at two scales, commonly referred to as small-scale and large-scale testing. The small-scale testing and resultant data are described in Mahoney et al. (2012b), and the large-scale testing and resultant data are presented in Schonewill et al. (2012). In tests at both scales, simulants were used to mimic the relevant physical properties projected for actual WTP process streams.

Daniel, Richard C.; Gauglitz, Phillip A.; Burns, Carolyn A.; Fountain, Matthew S.; Shimskey, Rick W.; Billing, Justin M.; Bontha, Jagannadha R.; Kurath, Dean E.; Jenks, Jeromy WJ; MacFarlan, Paul J.; Mahoney, Lenna A.

2013-08-01T23:59:59.000Z

17

LARGE SCALE PERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE AND THERMAL CONDUCTIVITY TEST  

E-Print Network [OSTI]

No.2 LARGE SCALE PERMEABILITY TEST OF THE GRANITE' IN THEMINE AND, THERMAL CONDUCTIVITY TEST Lars Lundstrom and HakanSUMMARY REPORT Background TEST SITE Layout of test places

Lundstrom, L.

2011-01-01T23:59:59.000Z

18

Fourth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms,  

E-Print Network [OSTI]

for Offshore Wind Farms, 20-21 October 2003, Billund, Denmark C. S. Nielsen, Hans F. Ravn, Camilla Schaumburg1 Fourth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks of Denmark, B. 321, DK-2800 Lyngby, Denmark, csm@imm.dtu.dk Two wind power prognosis criteria and regulating

19

Large-Scale Spray Releases: Initial Aerosol Test Results  

SciTech Connect (OSTI)

One of the events postulated in the hazard analysis at the Waste Treatment and Immobilization Plant (WTP) and other U.S. Department of Energy (DOE) nuclear facilities is a breach in process piping that produces aerosols with droplet sizes in the respirable range. The current approach for predicting the size and concentration of aerosols produced in a spray leak involves extrapolating from correlations reported in the literature. These correlations are based on results obtained from small engineered spray nozzles using pure liquids with Newtonian fluid behavior. The narrow ranges of physical properties on which the correlations are based do not cover the wide range of slurries and viscous materials that will be processed in the WTP and across processing facilities in the DOE complex. Two key technical areas were identified where testing results were needed to improve the technical basis by reducing the uncertainty due to extrapolating existing literature results. The first technical need was to quantify the role of slurry particles in small breaches where the slurry particles may plug and result in substantially reduced, or even negligible, respirable fraction formed by high-pressure sprays. The second technical need was to determine the aerosol droplet size distribution and volume from prototypic breaches and fluids, specifically including sprays from larger breaches with slurries where data from the literature are scarce. To address these technical areas, small- and large-scale test stands were constructed and operated with simulants to determine aerosol release fractions and generation rates from a range of breach sizes and geometries. The properties of the simulants represented the range of properties expected in the WTP process streams and included water, sodium salt solutions, slurries containing boehmite or gibbsite, and a hazardous chemical simulant. The effect of anti-foam agents was assessed with most of the simulants. Orifices included round holes and rectangular slots. The round holes ranged in size from 0.2 to 4.46 mm. The slots ranged from (width × length) 0.3 × 5 to 2.74 × 76.2 mm. Most slots were oriented longitudinally along the pipe, but some were oriented circumferentially. In addition, a limited number of multi-hole test pieces were tested in an attempt to assess the impact of a more complex breach. Much of the testing was conducted at pressures of 200 and 380 psi, but some tests were conducted at 100 psi. Testing the largest postulated breaches was deemed impractical because of the large size of some of the WTP equipment. The purpose of this report is to present the experimental results and analyses for the aerosol measurements obtained in the large-scale test stand. The report includes a description of the simulants used and their properties, equipment and operations, data analysis methodology, and test results. The results of tests investigating the role of slurry particles in plugging of small breaches are reported in Mahoney et al. 2012a. The results of the aerosol measurements in the small-scale test stand are reported in Mahoney et al. (2012b).

Schonewill, Philip P.; Gauglitz, Phillip A.; Bontha, Jagannadha R.; Daniel, Richard C.; Kurath, Dean E.; Adkins, Harold E.; Billing, Justin M.; Burns, Carolyn A.; Davis, James M.; Enderlin, Carl W.; Fischer, Christopher M.; Jenks, Jeromy WJ; Lukins, Craig D.; MacFarlan, Paul J.; Shutthanandan, Janani I.; Smith, Dennese M.

2012-12-01T23:59:59.000Z

20

Infrastructure for large-scale tests in marine autonomy  

E-Print Network [OSTI]

This thesis focuses on the development of infrastructure for research with large-scale autonomous marine vehicle fleets and the design of sampling trajectories for compressive sensing (CS). The newly developed infrastructure ...

Hummel, Robert A. (Robert Andrew)

2012-01-01T23:59:59.000Z

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


21

PROPERTIES IMPORTANT TO MIXING FOR WTP LARGE SCALE INTEGRATED TESTING  

SciTech Connect (OSTI)

Large Scale Integrated Testing (LSIT) is being planned by Bechtel National, Inc. to address uncertainties in the full scale mixing performance of the Hanford Waste Treatment and Immobilization Plant (WTP). Testing will use simulated waste rather than actual Hanford waste. Therefore, the use of suitable simulants is critical to achieving the goals of the test program. External review boards have raised questions regarding the overall representativeness of simulants used in previous mixing tests. Accordingly, WTP requested the Savannah River National Laboratory (SRNL) to assist with development of simulants for use in LSIT. Among the first tasks assigned to SRNL was to develop a list of waste properties that matter to pulse-jet mixer (PJM) mixing of WTP tanks. This report satisfies Commitment 5.2.3.1 of the Department of Energy Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2010-2: physical properties important to mixing and scaling. In support of waste simulant development, the following two objectives are the focus of this report: (1) Assess physical and chemical properties important to the testing and development of mixing scaling relationships; (2) Identify the governing properties and associated ranges for LSIT to achieve the Newtonian and non-Newtonian test objectives. This includes the properties to support testing of sampling and heel management systems. The test objectives for LSIT relate to transfer and pump out of solid particles, prototypic integrated operations, sparger operation, PJM controllability, vessel level/density measurement accuracy, sampling, heel management, PJM restart, design and safety margin, Computational Fluid Dynamics (CFD) Verification and Validation (V and V) and comparison, performance testing and scaling, and high temperature operation. The slurry properties that are most important to Performance Testing and Scaling depend on the test objective and rheological classification of the slurry (i.e., Newtonian or non-Newtonian). The most important properties for testing with Newtonian slurries are the Archimedes number distribution and the particle concentration. For some test objectives, the shear strength is important. In the testing to collect data for CFD V and V and CFD comparison, the liquid density and liquid viscosity are important. In the high temperature testing, the liquid density and liquid viscosity are important. The Archimedes number distribution combines effects of particle size distribution, solid-liquid density difference, and kinematic viscosity. The most important properties for testing with non-Newtonian slurries are the slurry yield stress, the slurry consistency, and the shear strength. The solid-liquid density difference and the particle size are also important. It is also important to match multiple properties within the same simulant to achieve behavior representative of the waste. Other properties such as particle shape, concentration, surface charge, and size distribution breadth, as well as slurry cohesiveness and adhesiveness, liquid pH and ionic strength also influence the simulant properties either directly or through other physical properties such as yield stress.

Koopman, D.; Martino, C.; Poirier, M.

2012-04-26T23:59:59.000Z

22

Evidence of Early Enrichment of the Galactic Disk by Large-Scale Winds  

E-Print Network [OSTI]

Large-scale homogeneous surveys of Galactic stars may indicate that the elemental abundance gradient evolves with cosmic time, a phenomenon that was not foreseen in existing models of Galactic chemical evolution (GCE). If the phenomenon is confirmed in future studies, we show that this effect, at least in part, is due to large-scale winds that once enriched the disk. These set up the steep abundance gradient in the inner disk (R <14 kpc). At the close of the wind phase, chemical enrichment through accretion of metal-poor material from the halo onto the disk gradually reduced the metallicity of the inner region, whereas a slow increase in the metallicity proceeded beyond the solar circle. Our "wind+infall" model accounts for flattening of the abundance gradient in the inner disk, in good agreement with observations. Accordingly, we propose that enrichment by large-scale winds is a crucial factor for chemical evolution in the disk. We anticipate that rapid flattening of the abundance gradient is the hallmark...

Tsujimoto, T; Freeman, K C

2010-01-01T23:59:59.000Z

23

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

E-Print Network [OSTI]

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

Kriesche, Pascal

24

Production cost and air emissions impacts of coal cycling in power systems with large-scale wind penetration  

E-Print Network [OSTI]

Production cost and air emissions impacts of coal cycling in power systems with large-scale wind emissions impacts of coal cycling in power systems with large-scale wind penetration David Luke Oates, and SO2 emissions as well as for the profitability of coal plants, as calculated by our dispatch model

Jaramillo, Paulina

25

Testing Inflation with Large Scale Structure: Connecting Hopes with Reality  

E-Print Network [OSTI]

The statistics of primordial curvature fluctuations are our window into the period of inflation, where these fluctuations were generated. To date, the cosmic microwave background has been the dominant source of information about these perturbations. Large scale structure is however from where drastic improvements should originate. In this paper, we explain the theoretical motivations for pursuing such measurements and the challenges that lie ahead. In particular, we discuss and identify theoretical targets regarding the measurement of primordial non-Gaussianity. We argue that when quantified in terms of the local (equilateral) template amplitude $f_{\\rm NL}^{\\rm loc}$ ($f_{\\rm NL}^{\\rm eq}$), natural target levels of sensitivity are $\\Delta f_{\\rm NL}^{\\rm loc, eq.} \\simeq 1$. We highlight that such levels are within reach of future surveys by measuring 2-, 3- and 4-point statistics of the galaxy spatial distribution. This paper summarizes a workshop held at CITA (University of Toronto) on October 23-24, 2014.

Marcelo Alvarez; Tobias Baldauf; J. Richard Bond; Neal Dalal; Roland de Putter; Olivier Doré; Daniel Green; Chris Hirata; Zhiqi Huang; Dragan Huterer; Donghui Jeong; Matthew C. Johnson; Elisabeth Krause; Marilena Loverde; Joel Meyers; P. Daniel Meerburg; Leonardo Senatore; Sarah Shandera; Eva Silverstein; Anže Slosar; Kendrick Smith; Matias Zaldarriaga; Valentin Assassi; Jonathan Braden; Amir Hajian; Takeshi Kobayashi; George Stein; Alexander van Engelen

2014-12-15T23:59:59.000Z

26

Large scale risk-assessment of wind-farms on population viability of a globally endangered long-lived raptor  

E-Print Network [OSTI]

through increments in mortality rates. For this purpose, we evaluate potential conse- quences of wind-term impacts of wind-farms rather than focusing on short-term mortality, as is often promoted by powerLarge scale risk-assessment of wind-farms on population viability of a globally endangered long

Carrete, Martina

27

Impact of Wind Shear and Tower Shadow Effects on Power System with Large Scale Wind Power  

E-Print Network [OSTI]

@et.aau.dk, csu@et.aau.dk, zch@et.aau.dk Abstract ­ Grid connected wind turbines are fluctuating power sources due on the power system small signal stability of wind turbines based on fixed-speed induction generators, doubly two interconnected power systems [9]. The wind power fluctuations produced by grid connected variable

Hu, Weihao

28

Goethite Bench-scale and Large-scale Preparation Tests  

SciTech Connect (OSTI)

The Hanford Waste Treatment and Immobilization Plant (WTP) is the keystone for cleanup of high-level radioactive waste from our nation's nuclear defense program. The WTP will process high-level waste from the Hanford tanks and produce immobilized high-level waste glass for disposal at a national repository, low activity waste (LAW) glass, and liquid effluent from the vitrification off-gas scrubbers. The liquid effluent will be stabilized into a secondary waste form (e.g. grout-like material) and disposed on the Hanford site in the Integrated Disposal Facility (IDF) along with the low-activity waste glass. The major long-term environmental impact at Hanford results from technetium that volatilizes from the WTP melters and finally resides in the secondary waste. Laboratory studies have indicated that pertechnetate ({sup 99}TcO{sub 4}{sup -}) can be reduced and captured into a solid solution of {alpha}-FeOOH, goethite (Um 2010). Goethite is a stable mineral and can significantly retard the release of technetium to the environment from the IDF. The laboratory studies were conducted using reaction times of many days, which is typical of environmental subsurface reactions that were the genesis of this new process. This study was the first step in considering adaptation of the slow laboratory steps to a larger-scale and faster process that could be conducted either within the WTP or within the effluent treatment facility (ETF). Two levels of scale-up tests were conducted (25x and 400x). The largest scale-up produced slurries of Fe-rich precipitates that contained rhenium as a nonradioactive surrogate for {sup 99}Tc. The slurries were used in melter tests at Vitreous State Laboratory (VSL) to determine whether captured rhenium was less volatile in the vitrification process than rhenium in an unmodified feed. A critical step in the technetium immobilization process is to chemically reduce Tc(VII) in the pertechnetate (TcO{sub 4}{sup -}) to Tc(Iv)by reaction with the ferrous ion, Fe{sup 2+}-Fe{sup 2+} is oxidized to Fe{sup 3+} - in the presence of goethite seed particles. Rhenium does not mimic that process; it is not a strong enough reducing agent to duplicate the TcO{sub 4}{sup -}/Fe{sup 2+} redox reactions. Laboratory tests conducted in parallel with these scaled tests identified modifications to the liquid chemistry necessary to reduce ReO{sub 4}{sup -} and capture rhenium in the solids at levels similar to those achieved by Um (2010) for inclusion of Tc into goethite. By implementing these changes, Re was incorporated into Fe-rich solids for testing at VSL. The changes also changed the phase of iron that was in the slurry product: rather than forming goethite ({alpha}-FeOOH), the process produced magnetite (Fe{sub 3}O{sub 4}). Magnetite was considered by Pacific Northwest National Laboratory (PNNL) and VSL to probably be a better product to improve Re retention in the melter because it decomposes at a higher temperature than goethite (1538 C vs. 136 C). The feasibility tests at VSL were conducted using Re-rich magnetite. The tests did not indicate an improved retention of Re in the glass during vitrification, but they did indicate an improved melting rate (+60%), which could have significant impact on HLW processing. It is still to be shown whether the Re is a solid solution in the magnetite as {sup 99}Tc was determined to be in goethite.

Josephson, Gary B.; Westsik, Joseph H.

2011-10-23T23:59:59.000Z

29

Large scale test simulations using the Virtual Environment for Test Optimization (VETO)  

SciTech Connect (OSTI)

The Virtual Environment for Test Optimization (VETO) is a set of simulation tools under development at Sandia to enable test engineers to do computer simulations of tests. The tool set utilizes analysis codes and test information to optimize design parameters and to provide an accurate model of the test environment which aides in the maximization of test performance, training, and safety. Previous VETO effort has included the development of two structural dynamics simulation modules that provide design and optimization tools for modal and vibration testing. These modules have allowed test engineers to model and simulate complex laboratory testing, to evaluate dynamic response behavior, and to investigate system testability. Further development of the VETO tool set will address the accurate modeling of large scale field test environments at Sandia. These field test environments provide weapon system certification capabilities and have different simulation requirements than those of laboratory testing.

Klenke, S.E.; Heffelfinger, S.R.; Bell, H.J.; Shierling, C.L.

1997-10-01T23:59:59.000Z

30

Probing large-scale wind structures in Vela X-1 using off-states with INTEGRAL  

E-Print Network [OSTI]

Vela X-1 is the prototype of the class of wind-fed accreting pulsars in high mass X-ray binaries hosting a supergiant donor. We have analyzed in a systematic way ten years of INTEGRAL data of Vela X-1 (22-50 keV) and we found that when outside the X-ray eclipse, the source undergoes several luminosity drops where the hard X-rays luminosity goes below 5x10^34 erg/s, becoming undetected by INTEGRAL. These drops in the X-ray flux are usually referred to as "off-states" in the literature. We have investigated the distribution of these off-states along the Vela X-1 ~8.9 day orbit, finding that their orbital occurrence displays an asymmetric distribution, with a higher probability to observe an off-state near the pre-eclipse than during the post-eclipse. This asymmetry can be explained by scattering of hard X-rays in a region of ionized wind, able to reduce the source hard X-ray brightness preferentially near eclipse ingress. We associate this ionized large-scale wind structure with the photo-ionization wake produc...

Sidoli, L; Fuerst, F; Torrejon, J M; Kretschmar, P; Bozzo, E; Pottschmidt, K

2014-01-01T23:59:59.000Z

31

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

SciTech Connect (OSTI)

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

David Wenzhong Gao

2012-09-30T23:59:59.000Z

32

Dynamics of large-scale solar-wind streams obtained by the double superposed epoch analysis  

E-Print Network [OSTI]

Using the OMNI data for period 1976-2000 we investigate the temporal profiles of 20 plasma and field parameters in the disturbed large-scale types of solar wind (SW): CIR, ICME (both MC and Ejecta) and Sheath as well as the interplanetary shock (IS). To take into account the different durations of SW types, we use the double superposed epoch analysis (DSEA) method: re-scaling the duration of the interval for all types in such a manner that, respectively, beginning and end for all intervals of selected type coincide. As the analyzed SW types can interact with each other and change parameters as a result of such interaction, we investigate separately 8 sequences of SW types: (1) CIR, (2) IS/CIR, (3) Ejecta, (4) Sheath/Ejecta, (5) IS/Sheath/Ejecta, (6) MC, (7) Sheath/MC, and (8) IS/Sheath/MC. The main conclusion is that the behavior of parameters in Sheath and in CIR are very similar both qualitatively and quantitatively. Both the high-speed stream (HSS) and the fast ICME play a role of pistons which push the pl...

Yermolaev, Yu I; Nikolaeva, N S; Yermolaev, M Yu

2015-01-01T23:59:59.000Z

33

Techno-economic Modeling of the Integration of 20% Wind and Large-scale Energy Storage in ERCOT by 2030  

SciTech Connect (OSTI)

This study�¢����s objective is to examine interrelated technical and economic avenues for the Electric Reliability Council of Texas (ERCOT) grid to incorporate up to and over 20% wind generation by 2030. Our specific interests are to look at the factors that will affect the implementation of both high level of wind power penetration (> 20% generation) and installation of large scale storage.

Ross Baldick; Michael Webber; Carey King; Jared Garrison; Stuart Cohen; Duehee Lee

2012-12-21T23:59:59.000Z

34

Small Solar Wind Transients and Their Connection to the Large-Scale Coronal Structure  

E-Print Network [OSTI]

I.G. : 2006, In situ solar wind and magnetic ?eld signaturesPenou, E. : 2008, The IMPACT Solar Wind Electron Analyzer (Heliospheric images of the solar wind at Earth. Astrophys.

2009-01-01T23:59:59.000Z

35

Hydraulic characterization of aquifers by thermal response testing: Validation by large-scale tank and field experiments  

E-Print Network [OSTI]

Hydraulic characterization of aquifers by thermal response testing: Validation by large-scale tank by application to a well-controlled, large-scale tank experiment with 9 m length, 6 m width, and 4.5 m depth, and by data interpretation from a field-scale test. The tank experiment imitates an advection-influenced TRT

Cirpka, Olaf Arie

36

Large-Scale Offshore Wind Power in the United States: Executive Summary  

SciTech Connect (OSTI)

This document provides a summary of a 236-page NREL report that provides a broad understanding of today's offshore wind industry, the offshore wind resource, and the associated technology challenges, economics, permitting procedures, and potential risks and benefits.

Musial, W.; Ram, B.

2010-09-01T23:59:59.000Z

37

Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile  

E-Print Network [OSTI]

Along the central coast of Chile is typically equatorward, upwelling-favorable wind associated with the southeast Pacific anticyclone. A coastal low-level jet often develops, and its wind speed is mostly controlled by the ...

Rahn, David A.

2012-10-16T23:59:59.000Z

38

Nonlinear Seismic Correlation Analysis of the JNES/NUPEC Large-Scale Piping System Tests.  

SciTech Connect (OSTI)

The Japan Nuclear Energy Safety Organization/Nuclear Power Engineering Corporation (JNES/NUPEC) large-scale piping test program has provided valuable new test data on high level seismic elasto-plastic behavior and failure modes for typical nuclear power plant piping systems. The component and piping system tests demonstrated the strain ratcheting behavior that is expected to occur when a pressurized pipe is subjected to cyclic seismic loading. Under a collaboration agreement between the US and Japan on seismic issues, the US Nuclear Regulatory Commission (NRC)/Brookhaven National Laboratory (BNL) performed a correlation analysis of the large-scale piping system tests using derailed state-of-the-art nonlinear finite element models. Techniques are introduced to develop material models that can closely match the test data. The shaking table motions are examined. The analytical results are assessed in terms of the overall system responses and the strain ratcheting behavior at an elbow. The paper concludes with the insights about the accuracy of the analytical methods for use in performance assessments of highly nonlinear piping systems under large seismic motions.

Nie,J.; DeGrassi, G.; Hofmayer, C.; Ali, S.

2008-06-01T23:59:59.000Z

39

Large-Scale Offshore Wind Power in the United States: Assessment of Opportunities and Barriers  

SciTech Connect (OSTI)

This paper assesses the potential for U.S. offshore wind to meet the energy needs of many coastal and Great Lakes states.

Musial, W.; Ram, B.

2010-09-01T23:59:59.000Z

40

CHANGES OF SYSTEM OPERATION COSTS DUE TO LARGE-SCALE WIND INTEGRATION  

E-Print Network [OSTI]

energy markets large amounts of fluctuating renewable energy sources for electricity production (RES and the electricity market. In order to cope with the fluctuations in the wind power production, other units in electricity markets Summary (max. 100 words) Within the European Union large amounts of intermittent wind

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


41

Re-evaluation of the 1995 Hanford Large Scale Drum Fire Test Results  

SciTech Connect (OSTI)

A large-scale drum performance test was conducted at the Hanford Site in June 1995, in which over one hundred (100) 55-gal drums in each of two storage configurations were subjected to severe fuel pool fires. The two storage configurations in the test were pallet storage and rack storage. The description and results of the large-scale drum test at the Hanford Site were reported in WHC-SD-WM-TRP-246, ''Solid Waste Drum Array Fire Performance,'' Rev. 0, 1995. This was one of the main references used to develop the analytical methodology to predict drum failures in WHC-SD-SQA-ANAL-501, 'Fire Protection Guide for Waste Drum Storage Array,'' September 1996. Three drum failure modes were observed from the test reported in WHC-SD-WM-TRP-246. They consisted of seal failure, lid warping, and catastrophic lid ejection. There was no discernible failure criterion that distinguished one failure mode from another. Hence, all three failure modes were treated equally for the purpose of determining the number of failed drums. General observations from the results of the test are as follows: {lg_bullet} Trash expulsion was negligible. {lg_bullet} Flame impingement was identified as the main cause for failure. {lg_bullet} The range of drum temperatures at failure was 600 C to 800 C. This is above the yield strength temperature for steel, approximately 540 C (1,000 F). {lg_bullet} The critical heat flux required for failure is above 45 kW/m{sup 2}. {lg_bullet} Fire propagation from one drum to the next was not observed. The statistical evaluation of the test results using, for example, the student's t-distribution, will demonstrate that the failure criteria for TRU waste drums currently employed at nuclear facilities are very conservative relative to the large-scale test results. Hence, the safety analysis utilizing the general criteria described in the five bullets above will lead to a technically robust and defensible product that bounds the potential consequences from postulated fires in TRU waste facilities, the means of storage in which are the Type A, 55-gal drums.

Yang, J M

2007-05-02T23:59:59.000Z

42

Large-Scale Wind Integration Studies in the United States: Preliminary Results; Preprint  

SciTech Connect (OSTI)

The National Renewable Energy Laboratory is managing two large regional wind integration studies on behalf of the United States Department of Energy. These two studies are believed to be the largest ever undertaken in the United States.

Milligan, M.; Lew, D.; Corbus, D.; Piwko, R.; Miller, N.; Clark, K.; Jordan, G.; Freeman, L.; Zavadil, B.; Schuerger, M.

2009-09-01T23:59:59.000Z

43

The role of hydroelectric generation in electric power systems with large scale wind generation  

E-Print Network [OSTI]

An increasing awareness of the operational challenges created by intermittent generation of electricity from policy-mandated renewable resources, such as wind and solar, has led to increased scrutiny of the public policies ...

Hagerty, John Michael

2012-01-01T23:59:59.000Z

44

Potential Climatic Impacts and Reliability of Large-Scale Offshore Wind Farms  

E-Print Network [OSTI]

The vast availability of wind power has fueled substantial interest in this renewable energy source as a potential near-zero greenhouse gas emission technology for meeting future world energy needs while addressing the ...

Wang, Chien

45

Spatial distribution of non-native invasive plants following large-scale wind damage at LaRue Pine Hills - Otter Pond Research Natural Area, Union County, Illinois.  

E-Print Network [OSTI]

??The objective of this study was to determine if a large-scale wind disturbance facilitated the invasion of forest interiors by non-native invasive plant species. The… (more)

Romano, Anthony John

2012-01-01T23:59:59.000Z

46

Testing of Large-Scale ICV Glasses with Hanford LAW Simulant  

SciTech Connect (OSTI)

Preliminary glass compositions for immobilizing Hanford low-activity waste (LAW) by the in-container vitrification (ICV) process were initially fabricated at crucible- and engineering-scale, including simulants and actual (radioactive) LAW. Glasses were characterized for vapor hydration test (VHT) and product consistency test (PCT) responses and crystallinity (both quenched and slow-cooled samples). Selected glasses were tested for toxicity characteristic leach procedure (TCLP) responses, viscosity, and electrical conductivity. This testing showed that glasses with LAW loading of 20 mass% can be made readily and meet all product constraints by a far margin. Glasses with over 22 mass% Na2O can be made to meet all other product quality and process constraints. Large-scale testing was performed at the AMEC, Geomelt Division facility in Richland. Three tests were conducted using simulated LAW with increasing loadings of 12, 17, and 20 mass% Na2O. Glass samples were taken from the test products in a manner to represent the full expected range of product performance. These samples were characterized for composition, density, crystalline and non-crystalline phase assemblage, and durability using the VHT, PCT, and TCLP tests. The results, presented in this report, show that the AMEC ICV product with meets all waste form requirements with a large margin. These results provide strong evidence that the Hanford LAW can be successfully vitrified by the ICV technology and can meet all the constraints related to product quality. The economic feasibility of the ICV technology can be further enhanced by subsequent optimization.

Hrma, Pavel R.; Kim, Dong-Sang; Vienna, John D.; Matyas, Josef; Smith, Donald E.; Schweiger, Michael J.; Yeager, John D.

2005-03-01T23:59:59.000Z

47

LARGE SCALE PERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE AND THERMAL CONDUCTIVITY TEST  

E-Print Network [OSTI]

PERMEABILITY TEST OF THE GRANITE' IN THE STRIPA MINE AND,PERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE ANDPERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE AND

Lundstrom, L.

2011-01-01T23:59:59.000Z

48

Large-Scale Pumping Test Recommendations for the 200-ZP-1 Operable Unit  

SciTech Connect (OSTI)

CH2M Hill Plateau Remediation Company (CHPRC) is currently assessing aquifer characterization needs to optimize pump-and-treat remedial strategies (e.g., extraction well pumping rates, pumping schedule/design) in the 200-ZP-1 operable unit (OU), and in particular for the immediate area of the 241 TX-TY Tank Farm. Specifically, CHPRC is focusing on hydrologic characterization opportunities that may be available for newly constructed and planned ZP-1 extraction wells. These new extraction wells will be used to further refine the 3-dimensional subsurface contaminant distribution within this area and will be used in concert with other existing pump-and-treat wells to remediate the existing carbon tetrachloride contaminant plume. Currently, 14 extraction wells are actively used in the Interim Record of Decision ZP-1 pump-and-treat system for the purpose of remediating the existing carbon tetrachloride contamination in groundwater within this general area. As many as 20 new extraction wells and 17 injection wells may be installed to support final pump-and-treat operations within the OU area. It should be noted that although the report specifically refers to the 200-ZP-1 OU, the large-scale test recommendations are also applicable to the adjacent 200-UP-1 OU area. This is because of the similar hydrogeologic conditions exhibited within these two adjoining OU locations.

Spane, Frank A.

2010-09-08T23:59:59.000Z

49

Coupled Dynamic Analysis of Large-Scale Mono-Column Offshore Wind Turbine with a Single Tether Hinged in Seabed  

E-Print Network [OSTI]

The increased interest in the offshore wind resource in both industry and academic and the extension of the wind field where offshore wind turbine can be deployed has stimulated quite a number of offshore wind turbines concepts. This thesis presents...

Chen, Jieyan

2012-10-19T23:59:59.000Z

50

Large Scale Triaxial Testing of Mechanically Stabilized Earth Retaining Wall Backfill  

E-Print Network [OSTI]

3.2.1 Sample Preparation : : : : : : : : : : : : : : : : : : : : : : : : 16 3.2.2 Testing : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 21 4 DATA INTERPRETATION : : : : : : : : : : : : : : : : : : : : : : : : : : : 23 4.1 Data..., the test apparatus was designed with a 7.5-inch interior diameter acrylic chamber thus limiting the test specimen diameter to 6-inches. Following ASTM D7181 Standard Test Method for Consolidated Drained Triaxial Compression Test for Soils (ASTM, 2011...

Garton, Mackenzie

2013-01-11T23:59:59.000Z

51

Testing theoretical game theory results on a large scale : prisoner's dilemma on Facebook  

E-Print Network [OSTI]

In my research, I designed and implemented an online game accessable to a large diverse audience via the Facebook social network to test out game theoretic results and study social interactions. In this game, we designed ...

Long, Sunny (Sunny X.)

2013-01-01T23:59:59.000Z

52

Large-Scale in the United  

E-Print Network [OSTI]

Large-Scale Offshore Wind Power in the United States ASSESSMENT OF OPPORTUNITIES AND BARRIERS, including 10% post consumer waste. #12;Large-Scale Offshore Wind Power in the United States ASSESSMENT Energy, Office of Wind and Water Power Technologies for their financial and technical support

53

Abstract--As a common tendency, large-scale wind farms are increasingly connected to the transmission system of modern  

E-Print Network [OSTI]

stability I. INTRODUCTION arge-scale wind power plants are increasingly integrated into the transmission regulation. For variable-speed wind turbines which are connected to the power system through power electronic convertors, one advantage is that the output active power and reactive power can be controlled separately

Chen, Zhe

54

Impact of Distribution-Connected Large-Scale Wind Turbines on Transmission System Stability during Large Disturbances: Preprint  

SciTech Connect (OSTI)

This work examines the dynamic impacts of distributed utility-scale wind power during contingency events on both the distribution system and the transmission system. It is the first step toward investigating high penetrations of distribution-connected wind power's impact on both distribution and transmission stability.

Zhang, Y.; Allen, A.; Hodge, B. M.

2014-02-01T23:59:59.000Z

55

Large scale test rig for flow visualization and leakage measurement of labyrinth seals  

E-Print Network [OSTI]

dimensions of the two categories of seals considered showing:(a) seal without annular groove and (b) seal with annular groove. 38 4. 2 Schematic of test facility layout showing by-pass valve. 41 5. 1 Design dimension variables for: (a) seal without.... g Gravitational constant. Nondimensional leakage resistance coefficient. I Length of straight run of pipe. P? Bulk pressure at inlet of seal. Bulk presure at outlet of seal. Cavity leakage Reynolds number. Stator step size. V, ? Bulk velocity...

Broussard, Daniel Harold

1991-01-01T23:59:59.000Z

56

ANEMOS: Development of a Next Generation Wind Power Forecasting System for the Large-Scale Integration of Onshore &  

E-Print Network [OSTI]

-NTUA, Greece. * georges.kariniotakis@ensmp.fr, tel:+33-493957501, Ecole des Mines de Paris, Centre d'Energetique 6% to 12% by 2010. Under this target, the problem of integration of RES and namely of wind energy

Paris-Sud XI, Université de

57

Construction and testing of a large scale prototype of a silicon tungsten electromagnetic calorimeter for a future lepton collider  

E-Print Network [OSTI]

The CALICE collaboration is preparing large scale prototypes of highly granular calorimeters for detectors to be operated at a future linear electron positron collider. After several beam campaigns at DESY, CERN and FNAL, the CALICE collaboration has demonstrated the principle of highly granular electromagnetic calorimeters with a first prototype called physics prototype. The next prototype, called technological prototype, addresses the engineering challenges which come along with the realisation of highly granular calorimeters. This prototype will comprise 30 layers where each layer is composed of four 9_9 cm2 silicon wafers. The front end electronics is integrated into the detector layers. The size of each pixel is 5_5 mm2. This prototype enter sits construction phase. We present results of the first layers of the technological prototype obtained during beam test campaigns in spring and summer 2012. According to these results the signal over noise ratio of the detector exceeds the R&D goal of10:1.

Rouëné,J

2013-01-01T23:59:59.000Z

58

7th International Workshop on Large-Scale Integration of Wind Power and on Transmission Networks for Offshore Wind Farms Models for HLI analysis of power systems with  

E-Print Network [OSTI]

for Offshore Wind Farms 1 Models for HLI analysis of power systems with offshore wind farms and distributed power plants, distributed generation and offshore wind farms. Particular attention is paid to the latter]-[4], but there is a lack of models of offshore wind farms, which introduce new issues for their representation, due to some

Bak-Jensen, Birgitte

59

Large-Scale Uncertainty and Error Analysis for Time-dependent Fluid/Structure Interactions in Wind Turbine Applications  

SciTech Connect (OSTI)

The following is the final report covering the entire period of this aforementioned grant, June 1, 2011 - May 31, 2013 for the portion of the effort corresponding to Stanford University (SU). SU has partnered with Sandia National Laboratories (PI: Mike S. Eldred) and Purdue University (PI: Dongbin Xiu) to complete this research project and this final report includes those contributions made by the members of the team at Stanford. Dr. Eldred is continuing his contributions to this project under a no-cost extension and his contributions to the overall effort will be detailed at a later time (once his effort has concluded) on a separate project submitted by Sandia National Laboratories. At Stanford, the team is made up of Profs. Alonso, Iaccarino, and Duraisamy, post-doctoral researcher Vinod Lakshminarayan, and graduate student Santiago Padron. At Sandia National Laboratories, the team includes Michael Eldred, Matt Barone, John Jakeman, and Stefan Domino, and at Purdue University, we have Prof. Dongbin Xiu as our main collaborator. The overall objective of this project was to develop a novel, comprehensive methodology for uncertainty quantification by combining stochastic expansions (nonintrusive polynomial chaos and stochastic collocation), the adjoint approach, and fusion with experimental data to account for aleatory and epistemic uncertainties from random variable, random field, and model form sources. The expected outcomes of this activity were detailed in the proposal and are repeated here to set the stage for the results that we have generated during the time period of execution of this project: 1. The rigorous determination of an error budget comprising numerical errors in physical space and statistical errors in stochastic space and its use for optimal allocation of resources; 2. A considerable increase in efficiency when performing uncertainty quantification with a large number of uncertain variables in complex non-linear multi-physics problems; 3. A solution to the long-time integration problem of spectral chaos approaches; 4. A rigorous methodology to account for aleatory and epistemic uncertainties, to emphasize the most important variables via dimension reduction and dimension-adaptive refinement, and to support fusion with experimental data using Bayesian inference; 5. The application of novel methodologies to time-dependent reliability studies in wind turbine applications including a number of efforts relating to the uncertainty quantification in vertical-axis wind turbine applications. In this report, we summarize all accomplishments in the project (during the time period specified) focusing on advances in UQ algorithms and deployment efforts to the wind turbine application area. Detailed publications in each of these areas have also been completed and are available from the respective conference proceedings and journals as detailed in a later section.

Alonso, Juan J. [Stanford University; Iaccarino, Gianluca [Stanford University

2013-08-25T23:59:59.000Z

60

K Basin Sludge Conditioning Testing Nitric Acid Dissolution Testing of K East Area Sludge Composite, Small- and Large-Scale Testing  

SciTech Connect (OSTI)

This report describes work performed by Pacific Northwest National Laboratory (PNNL) for Numatec Hanford Corporation (NHC) to support the development of the K Basin Sludge Treatment System. For this work, testing was performed to examine the dissolution behavior of a K East Basin floor and Weasel Pit sludge composite, referred to as K East area sludge composite, in nitric acid at the following concentrations: 2 M, 4 M, 6 M and 7.8 M. With the exception of one high solids loading test the nitric acid was added at 4X the stoichiometric requirement (assuming 100% of the sludge was uranium metal). The dissolution tests were conducted at boiling temperatures for 24 hours. Most of the tests were conducted with {approximately}2.5 g of sludge (dry basis). The high solids loading test was conducted with {approximately}7 g of sludge. A large-scale dissolution test was conducted with 26.5 g of sludge and 620 mL of 6 M nitric acid. The objectives of this test were to (1) generate a sufficient quantity of acid-insoluble residual solids for use in leaching studies, and (2) examine the dissolution behavior of the sludge composite at a larger scale.

Carlson, C.D.; Delegard, C.H.; Burgeson, I.E.; Schmidt, A.J.; Silvers, K.L.

1999-04-02T23:59:59.000Z

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


61

LARGE-SCALE MECURY CONTROL TECHNOLOGY TESTING FOR LIGNITE-FIRED UTILITIES-OXIDATION SYSTEMS FOR WET FGD  

SciTech Connect (OSTI)

The Energy & Environmental Research Center (EERC) is conducting a consortium-based effort directed toward resolving the mercury (Hg) control issues facing the lignite industry. Specifically, the EERC team--the EERC, EPRI, URS, ADA-ES, Babcock & Wilcox, the North Dakota Industrial Commission, SaskPower, and the Mercury Task Force, which includes Basin Electric Power Cooperative, Otter Tail Power Company, Great River Energy, Texas Utilities (TXU), Montana-Dakota Utilities Co., Minnkota Power Cooperative, BNI Coal Ltd., Dakota Westmoreland Corporation, and the North American Coal Company--has undertaken a project to significantly and cost-effectively oxidize elemental mercury in lignite combustion gases, followed by capture in a wet scrubber. This approach will be applicable to virtually every lignite utility in the United States and Canada and potentially impact subbituminous utilities. The oxidation process is proven at the pilot-scale and in short-term full-scale tests. Additional optimization is continuing on oxidation technologies, and this project focuses on longer-term full-scale testing. The lignite industry has been proactive in advancing the understanding of and identifying control options for Hg in lignite combustion flue gases. Approximately 1 year ago, the EERC and EPRI began a series of Hg-related discussions with the Mercury Task Force as well as utilities firing Texas and Saskatchewan lignites. This project is one of three being undertaken by the consortium to perform large-scale Hg control technology testing to address the specific needs and challenges to be met in controlling Hg from lignite-fired power plants. This project involves Hg oxidation upstream of a system equipped with an electrostatic precipitator (ESP) followed by wet flue gas desulfurization (FGD). The team involved in conducting the technical aspects of the project includes the EERC, Babcock & Wilcox, URS, and ADA-ES. The host sites include Minnkota Power Cooperative Milton R. Young Unit 2 and TXU Monticello Unit 3. The work involves establishing Hg oxidation levels upstream of air pollution control devices (APCDs) and removal rates across existing ESP and FGD units, determining costs associated with those removal rates, investigating the possibility of the APCD acting as a multipollutant control device, quantifying the balance of plant impacts of the control technologies, and facilitating technology commercialization.

Michael J. Holmes; Steven A. Benson; Jeffrey S. Thompson

2004-03-01T23:59:59.000Z

62

VP 100: New Facility in Boston to Test Large-Scale Wind Blades | Department  

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 on Delicious Rank EERE:YearRound-Up from theDepartment of Dept. ofUSAPotentially SensitiveUsersVOLTTRONof Energy New

63

Large-Scale Testing of Steel-Reinforced Concrete (SRC) Coupling Beams Embedded into Reinforced Concrete Structural Walls  

E-Print Network [OSTI]

Concrete Cylinder Testing the latter stages of testing, concrete spalling was observedObtained from Concrete Cylinder Testing f' c,test (ksi) ? 0,

Motter, Christopher John

2014-01-01T23:59:59.000Z

64

The Hierarchical Rater Model for Rated Test Items and its Application to Large-Scale Educational Assessment Data  

E-Print Network [OSTI]

-ended (or "constructed response") test items have become a standard part of the educational assessment

65

The Hierarchical Rater Model for Rated Test Items and its Application to LargeScale Educational Assessment Data 1  

E-Print Network [OSTI]

­ended (or ``constructed response'') test items have become a standard part of the educational assessment

66

Results of Large-Scale Testing on Effects of Anti-Foam Agent on Gas Retention and Release  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) Office of River Protection’s Waste Treatment Plant (WTP) will process and treat radioactive waste that is stored in tanks at the Hanford Site. The waste treatment process in the pretreatment facility will mix both Newtonian and non-Newtonian slurries in large process tanks. Process vessels mixing non-Newtonian slurries will use pulse jet mixers (PJMs), air sparging, and recirculation pumps. An anti-foam agent (AFA) will be added to the process streams to prevent surface foaming, but may also increase gas holdup and retention within the slurry. The work described in this report addresses gas retention and release in simulants with AFA through testing and analytical studies. Gas holdup and release tests were conducted in a 1/4-scale replica of the lag storage vessel operated in the Pacific Northwest National Laboratory (PNNL) Applied Process Engineering Laboratory using a kaolin/bentonite clay and AZ-101 HLW chemical simulant with non-Newtonian rheological properties representative of actual waste slurries. Additional tests were performed in a small-scale mixing vessel in the PNNL Physical Sciences Building using liquids and slurries representing major components of typical WTP waste streams. Analytical studies were directed at discovering how the effect of AFA might depend on gas composition and predicting the effect of AFA on gas retention and release in the full-scale plant, including the effects of mass transfer to the sparge air. The work at PNNL was part of a larger program that included tests conducted at Savannah River National Laboratory (SRNL) that is being reported separately. SRNL conducted gas holdup tests in a small-scale mixing vessel using the AZ-101 high-level waste (HLW) chemical simulant to investigate the effects of different AFAs, their components, and of adding noble metals. Full-scale, single-sparger mass transfer tests were also conducted at SRNL in water and AZ-101 HLW simulant to provide data for PNNL’s WTP gas retention and release modeling.

Stewart, Charles W.; Guzman-Leong, Consuelo E.; Arm, Stuart T.; Butcher, Mark G.; Golovich, Elizabeth C.; Jagoda, Lynette K.; Park, Walter R.; Slaugh, Ryan W.; Su, Yin-Fong; Wend, Christopher F.; Mahoney, Lenna A.; Alzheimer, James M.; Bailey, Jeffrey A.; Cooley, Scott K.; Hurley, David E.; Johnson, Christian D.; Reid, Larry D.; Smith, Harry D.; Wells, Beric E.; Yokuda, Satoru T.

2008-01-03T23:59:59.000Z

67

Large scale tracking algorithms.  

SciTech Connect (OSTI)

Low signal-to-noise data processing algorithms for improved detection, tracking, discrimination and situational threat assessment are a key research challenge. As sensor technologies progress, the number of pixels will increase signi cantly. This will result in increased resolution, which could improve object discrimination, but unfortunately, will also result in a significant increase in the number of potential targets to track. Many tracking techniques, like multi-hypothesis trackers, suffer from a combinatorial explosion as the number of potential targets increase. As the resolution increases, the phenomenology applied towards detection algorithms also changes. For low resolution sensors, "blob" tracking is the norm. For higher resolution data, additional information may be employed in the detection and classfication steps. The most challenging scenarios are those where the targets cannot be fully resolved, yet must be tracked and distinguished for neighboring closely spaced objects. Tracking vehicles in an urban environment is an example of such a challenging scenario. This report evaluates several potential tracking algorithms for large-scale tracking in an urban environment.

Hansen, Ross L.; Love, Joshua Alan; Melgaard, David Kennett; Karelitz, David B.; Pitts, Todd Alan; Zollweg, Joshua David; Anderson, Dylan Z.; Nandy, Prabal; Whitlow, Gary L.; Bender, Daniel A.; Byrne, Raymond Harry

2015-01-01T23:59:59.000Z

68

NREL: Wind Research - Testing  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recoveryLaboratory | NationalJohn F. Geisz,AerialStaff Here you will findTesting

69

Concept tests: Wind tunnel tests in controlled wind Comparison tests: Free field comparison to 3D sonic anemometer  

E-Print Network [OSTI]

comparable potential. Wind measurements on wind turbines in undisturbed wind, relative to nacelle anemometryConcept tests: Wind tunnel tests in controlled wind Comparison tests: Free field comparison to 3D" by CFD calculations Spinner AnemometrySpinner Anemometry -- An Innovative Wind Measurement Concept

70

Performance of powder-filled evacuated panel insulation in a manufactured home roof cavity: Tests in the Large Scale Climate Simulator  

SciTech Connect (OSTI)

A full-scale section of half the top of a single-wide manufactured home has been studied in the Large Scale Climate Simulator (LSCS) at the Oak Ridge National Laboratory. A small roof cavity with little room for insulation at the eaves is often the case with single-wide units and limits practical ways to improve thermal performance. The purpose of the current tests was to obtain steady-state performance data for the roof cavity of the manufactured home test section when the roof cavity was insulated with fiberglass batts, blown-in rock wool insulation or combinations of these insulations and powder-filled evacuated panel (PEP) insulation. Four insulation configurations were tested: (A) a configuration with two layers of nominal R{sub US}-7 h {center_dot} ft{sup 2} {center_dot} F/BTU (R{sub SI}-1.2 m{sup 2} {center_dot} K/W) fiberglass batts; (B) a layer of PEPs and one layer of the fiberglass batts; (C) four layers of the fiberglass batts; and (D) an average 4.1 in. (10.4 cm) thick layer of blown-in rock wool at an average density of 2.4 lb/ft{sup 3} (38 kg/m{sup 3}). Effects of additional sheathing were determined for Configurations B and C. With Configuration D over the ceiling, two layers of expanded polystyrene (EPS) boards, each about the same thickness as the PEPs, were installed over the trusses instead of the roof. Aluminum foils facing the attic and over the top layer of EPS were added. The top layer of EPS was then replaced by PEPs.

Petrie, T.W.; Kosny, J.; Childs, P.W.

1996-03-01T23:59:59.000Z

71

NREL Wind Turbine Blade Structural Testing of the Modular Wind Energy MW45 Blade: Cooperative Research and Development Final Report, CRADA Number CRD-09-354  

SciTech Connect (OSTI)

This CRADA was a purely funds-in CRADA with Modular Wind Energy (MWE). MWE had a need to perform full-scale testing of a 45-m wind turbine blade. NREL/NWTC provided the capabilities, facilities, and equipment to test this large-scale MWE wind turbine blade. Full-scale testing is required to demonstrate the ability of the wind turbine blade to withstand static design load cases and demonstrate the fatigue durability. Structural testing is also necessary to meet international blade testing certification requirements. Through this CRADA, MWE would obtain test results necessary for product development and certification, and NREL would benefit by working with an industrial partner to better understand the unique test requirements for wind turbine blades with advanced structural designs.

Hughes, S.

2012-05-01T23:59:59.000Z

72

Sparkr Blade Test Centre Fatigue tests of wind turbine blades  

E-Print Network [OSTI]

Sparkær Blade Test Centre Fatigue tests of wind turbine blades Flapwise fatigue tests of 3 blades wind load. By turning and oscillating the blade in the horzontal direction, an R-ratio of ­1 running at the Sparkær Centre Blade Test Facilities. Fatigue blade tests are performed in order

73

Wind Technology Testing Center Acquires New Blade Fatigue Test...  

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

Technology Testing Center Acquires New Blade Fatigue Test System Wind Technology Testing Center Acquires New Blade Fatigue Test System August 1, 2013 - 4:33pm Addthis This is an...

74

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 12, NO. 12, DECEMBER 2004 1263 SOC Test Planning Using Virtual Test  

E-Print Network [OSTI]

(Cost of investing in a new ATE, also known as Capital Expenditure): Complex cores often re- quire test cost requires that once a new, expensive ATE has been purchased, its resources must be utilized-speed ATE channels to drive slower scan chains leads to an underutilization of resources, thereby resulting

Chakrabarty, Krishnendu

75

Sparkr Blade Test Centre Static tests of wind turbine blades  

E-Print Network [OSTI]

Sparkær Blade Test Centre Static tests of wind turbine blades Static blade tests are performed-4000 Roskilde Denmark www.risoe.dk Wind Energy Department Sparkær Blade test Centre vea@risoe.dk Tel in order to determine the structural properties of a blade including stiffness data and strain distribution

76

Colorado and South Carolina: New Wind Test Facilities Open  

Office of Energy Efficiency and Renewable Energy (EERE)

Two state-of-the-art wind testing facilities will accelerate development and deployment of wind energy technologies.

77

SMART Wind Turbine Rotor: Design and Field Test | Department...  

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

Design and Field Test SMART Wind Turbine Rotor: Design and Field Test This report documents the design, fabrication, and testing of the SMART Wind Turbine Rotor. This work...

78

A Bootstrap Technique for Testing the Relationship Between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields  

SciTech Connect (OSTI)

In this paper an atmospheric classification scheme based on fields that are resolved by global climate models (and numerical weather prediction models) is investigated as a mechanism to map the large-scale (synoptic-scale) atmospheric state to distributions of local-scale cloud properties. Using a bootstrap resampling technique, the temporal stability and distinctness of vertical profiles of cloud occurrence (obtained from a vertically pointing millimeter wavelength cloud-radar) are analyzed as a function of the atmospheric state. A stable class-based map from the large-scale to local-scale cloud properties could be of great utility in the analysis of GCM-predicted cloud properties, by providing a physical context from which to understand any differences between the model output and observations, as well as to separate differences (in total distribution) that are caused by having different weather regimes (or synoptic scale activity) rather than problems in the representation of clouds for a particular regime. Furthermore, if sufficiently robust mappings can be established, it could form the basis of a statistical GCM cloud parameterization.

Marchand, Roger T.; Beagley, Nathaniel; Thompson, Sandra E.; Ackerman, Thomas P.; Schultz, David M.

2006-11-01T23:59:59.000Z

79

The Great Plains Wind Power Test Facility  

SciTech Connect (OSTI)

This multi-year, multi-faceted project was focused on the continued development of a nationally-recognized facility for the testing, characterization, and improvement of grid-connected wind turbines, integrated wind-water desalination systems, and related educational and outreach topics. The project involved numerous faculty and graduate students from various engineering departments, as well as others from the departments of Geosciences (in particular the Atmospheric Science Group) and Economics. It was organized through the National Wind Institute (NWI), which serves as an intellectual hub for interdisciplinary and transdisciplinary research, commercialization and education related to wind science, wind energy, wind engineering and wind hazard mitigation at Texas Tech University (TTU). Largely executed by an academic based team, the project resulted in approximately 38 peer-reviewed publications, 99 conference presentations, the development/expansion of several experimental facilities, and two provisional patents.

Schroeder, John

2014-01-31T23:59:59.000Z

80

NREL Small Wind Turbine Test Project: Mariah Power's Windspire Wind Turbine Test Chronology  

SciTech Connect (OSTI)

This report presents a chronology of tests conducted at NREL's National Wind Technology Center on Mariah Power's Windspire 1.2-kW wind turbine and a letter of response from Mariah Power.

Huskey, A.; Forsyth, T.

2009-06-01T23:59:59.000Z

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


81

Combined Experiment Phase 1. [Horizontal axis wind turbines: wind tunnel testing versus field testing  

SciTech Connect (OSTI)

How does wind tunnel airfoil data differ from the airfoil performance on an operating horizontal axis wind turbine (HAWT) The National Renewable Energy laboratory has been conducting a comprehensive test program focused on answering this question and understanding the basic fluid mechanics of rotating HAWT stall aerodynamics. The basic approach was to instrument a wind rotor, using an airfoil that was well documented by wind tunnel tests, and measure operating pressure distributions on the rotating blade. Based an the integrated values of the pressure data, airfoil performance coefficients were obtained, and comparisons were made between the rotating data and the wind tunnel data. Care was taken to the aerodynamic and geometric differences between the rotating and the wind tunnel models. This is the first of two reports describing the Combined Experiment Program and its results. This Phase I report covers background information such as test setup and instrumentation. It also includes wind tunnel test results and roughness testing.

Butterfield, C.P.; Musial, W.P.; Simms, D.A.

1992-10-01T23:59:59.000Z

82

Advanced Control Design and Testing for Wind Turbines at the...  

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

Control Design and Testing for Wind Turbines at the National Renewable Energy Laboratory: Preprint Advanced Control Design and Testing for Wind Turbines at the National Renewable...

83

Visualization of Large-Scale Distributed Data  

E-Print Network [OSTI]

that are now considered the "lenses" for examining large-scale data. THE LARGE-SCALE DATA VISUALIZATIONVisualization of Large-Scale Distributed Data Jason Leigh1 , Andrew Johnson1 , Luc Renambot1 representation of data and the interactive manipulation and querying of the visualization. Large-scale data

Johnson, Andrew

84

1144 IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 15, NO. 10, OCTOBER 2007 Wafer-Level Modular Testing of Core-Based SoCs  

E-Print Network [OSTI]

1174. An earlier version of this paper was published in the Proceedings of the IEEE International TestCs. To reduce packaging cost and the test cost for pack- aged chips, wafer-level testing (wafer sort) is used]­[10]; these methods are mostly aimed at reducing the test time for package test, where all the scan-based patterns

Chakrabarty, Krishnendu

85

Building State-of-the-Art Wind Technology Testing Facilities (Fact Sheet)  

SciTech Connect (OSTI)

The new Wind Technology Test Center is the only facility in the nation capable of testing wind turbine blades up to 90 meters in length. A critical factor to wind turbine design and development is the ability to test new designs, components, and materials. In addition, wind turbine blade manufacturers are required to test their blades as part of the turbine certification process. The National Renewable Energy Laboratory (NREL) partnered with the U.S. Department of Energy (DOE) Wind Program and the Massachusetts Clean Energy Center (MassCEC) to design, construct, and operate the Wind Technology Center (WTTC) in Boston, Massachusetts. The WTTC offers a full suite of certification tests for turbine blades up to 90 meters in length. NREL worked closely with MTS Systems Corporation to develop the novel large-scale test systems needed to conduct the static and fatigue tests required for certification. Static tests pull wind turbine blades horizontally and vertically to measure blade deflection and strains. Fatigue tests cycle the blades millions of times to simulate what a blade goes through in its lifetime on a wind turbine. For static testing, the WTTC is equipped with servo-hydraulic winches and cylinders that are connected to the blade through cables to apply up to an 84-mega Newton meter maximum static bending moment. For fatigue testing, MTS developed a commercial version of NREL's patented resonant excitation system with hydraulic cylinders that actuate linear moving masses on the blade at one or more locations. This system applies up to a 21-meter tip-to-tip fatigue test tip displacement to generate 20-plus years of cyclic field loads in a matter of months. NREL also developed and supplied the WTTC with an advanced data acquisition system capable of measuring and recording hundreds of data channels at very fast sampling rates while communicating with test control systems.

Not Available

2012-03-01T23:59:59.000Z

86

Riso-M-2546 g Wind Turbine Test  

E-Print Network [OSTI]

Riso-M-2546 g Wind Turbine Test Wind Matic WM 17S Troels Friis Pedersen The Test Station for Windmills Riso National Laboratory, DK-4000 Roskilde Denmark April 1986 #12;#12;RIS0-M-2546 WIND TURBINE describes standard measurements performed on a Wind-Matic WM 17S, 75 kW wind turbine. The measurements

87

A study of RELAP5/MOD2 and RELAP5/MOD3 predictions of a small break LOCA simulation conducted at the ROSA-IV Large Scale Test Facility  

E-Print Network [OSTI]

)pl / ? DE -Upp r Head Spray Nozzle rVent Valve Simulator Line Hot Leo Upper Plenum Leak Line r9 Core normal flow transient 'low ECCH Induction E-l EltO QtQ EltC] El Lower Plenum Figure 4. Pressure Vessel 12 Table II Primary... simulation codes RELAP5/MOD2 and RELAP5/MOD3 were utilized to calculate the phenomena which occurred during a small break LOCA simulation conducted at the ROSA-IV Large Scale Test Facility. The transient scenario was a 5% break in the cold leg with a loss...

Sloan, Sandra Mernell

1990-01-01T23:59:59.000Z

88

Establishment of Small Wind Turbine Regional Test Centers (Presentation)  

SciTech Connect (OSTI)

This presentation offers an overview of the Regional Test Centers project for Small Wind Turbine testing and certification.

Sinclair, K.

2011-09-16T23:59:59.000Z

89

Wind Turbine Generator System Acoustic Noise Test Report for the Gaia Wind 11-kW Wind Turbine  

SciTech Connect (OSTI)

This report details the acoustic noise test conducted on the Gaia-Wind 11-kW wind turbine at the National Wind Technology Center. The test turbine is a two- bladed, downwind wind turbine with a rated power of 11 kW. The test turbine was tested in accordance with the International Electrotechnical Commission standard, IEC 61400-11 Ed 2.1 2006-11 Wind Turbine Generator Systems -- Part 11 Acoustic Noise Measurement Techniques.

Huskey, A.

2011-11-01T23:59:59.000Z

90

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 16, NO. 11, NOVEMBER 2008 1429 Test Data Compression Using Selective  

E-Print Network [OSTI]

.2000674 testing can be reduced by using a large number of internal scan chains. However, the number of ATE, and Krishnendu Chakrabarty, Fellow, IEEE Abstract--We present a selective encoding method that reduces test data- 0204077. A preliminary version of this paper was published in the Proceeding of the IEEE International

Chakrabarty, Krishnendu

91

Large-Scale Renewable Energy Guide Webinar  

Broader source: Energy.gov [DOE]

Webinar introduces the “Large Scale Renewable Energy Guide." The webinar will provide an overview of this important FEMP guide, which describes FEMP's approach to large-scale renewable energy projects and provides guidance to Federal agencies and the private sector on how to develop a common process for large-scale renewable projects.

92

Conundrum of the Large Scale Streaming  

E-Print Network [OSTI]

The etiology of the large scale peculiar velocity (large scale streaming motion) of clusters would increasingly seem more tenuous, within the context of the gravitational instability hypothesis. Are there any alternative testable models possibly accounting for such large scale streaming of clusters?

T. M. Malm

1999-09-12T23:59:59.000Z

93

Cooperative field test program for wind systems  

SciTech Connect (OSTI)

The objectives of the Federal Wind Energy Program, managed by the US Department of Energy (DOE), are (1) to assist industry and utilities in achieving a multi-regional US market penetration of wind systems, and (2) to establish the United States as the world leader in the development of advanced wind turbine technology. In 1984, the program conducted a series of planning workshops with representatives from the wind energy industry to obtain input on the Five-Year Research Plan then being prepared by DOE. One specific suggestion that came out of these meetings was that the federal program should conduct cooperative research tests with industry to enhance the technology transfer process. It was also felt that the active involvement of industry in DOE-funded research would improve the state of the art of wind turbine technology. DOE established the Cooperative Field Test Program (CFTP) in response to that suggestion. This program was one of the first in DOE to feature joint industry-government research test teams working toward common objectives.

Bollmeier, W.S. II; Dodge, D.M.

1992-03-01T23:59:59.000Z

94

RELAP5/MOD3 simulation of the loss of residual heat removal during midloop operation experiment conducted at the ROSA-IV/ Large Scale Test Facility  

E-Print Network [OSTI]

The modeling of the complex thermal hydraulics Of reactor systems involves the use Of experimental test systems as well as numerical codes. A simulation of the loss of residual heat removal (RHR) during midloop operations was performed using...

Banerjee, Sibashis Sanatkumar

2012-06-07T23:59:59.000Z

95

NREL: Wind Research - Accredited Testing  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData andFleet Test and EvaluationManagementWorking with Us

96

Wind Turbine Safety and Function Test Report for the Gaia-Wind 11-kW Wind Turbine  

SciTech Connect (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers to wind energy expansion by providing independent testing results for small wind turbines (SWT). In total, four turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests performed on the turbines, including power performance, duration, noise, and power-quality tests. The results of the testing provide the manufacturers with reports that can be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11-kW wind turbine mounted on an 18-m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark. The system was installed by the NWTC site operations group with guidance and assistance from Gaia-Wind.

Huskey, A.; Bowen, A.; Jager, D.

2010-01-01T23:59:59.000Z

97

Sun Also Rises: Planning for Large-Scale Solar Power  

SciTech Connect (OSTI)

Wind, solar, and other renewable energy are an important part of any present-day energy. The portion of energy they supply will certainly be increasing over the next few years. Arguably, large-scale wind power has reached technological maturity, and with more than 100 GW of capacity, ample experience exists on integrating wind systems. Solar technologies, on the other hand, are emerging, and substantial R&D investments are being made to achieve parity with retail electricity costs in the near future. As this happens, annual capacity additions of solar power will become significant.

Bebic, J.; Walling, R.; O'Brien, K.; Kroposki, B.

2009-05-01T23:59:59.000Z

98

Wind Turbine Test \\^ind Matic WM 15S  

E-Print Network [OSTI]

00 ·2 V. v/ RisoM-2481 Wind Turbine Test \\^ind Matic WM 15S Troels Friis Pedersent The Test Station for Windmills Riso National Laboratory, DK-4000 Roskilde, Denmark July 1986 #12;#12;RIS0-M-2481 WIND TURBINE describes standard measurements performed on a Wind-Matic WM 15S, 55 kW wind turbine. The measurements

99

Weekly Wrap-Up: Testing Wind Blades, Converting Carbon Emissions...  

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

Weekly Wrap-Up: Testing Wind Blades, Converting Carbon Emissions, and Eco-Driving Weekly Wrap-Up: Testing Wind Blades, Converting Carbon Emissions, and Eco-Driving July 23, 2010 -...

100

Microfluidic Large-Scale Integration: The Evolution  

E-Print Network [OSTI]

Microfluidic Large-Scale Integration: The Evolution of Design Rules for Biological Automation, polydimethylsiloxane Abstract Microfluidic large-scale integration (mLSI) refers to the develop- ment of microfluidic, are discussed. Several microfluidic components used as building blocks to create effective, complex, and highly

Quake, Stephen R.

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


101

DLFM library tools for large scale dynamic applications.  

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

DLFM library tools for large scale dynamic applications DLFM library tools for large scale dynamic applications Large scale Python and other dynamic applications may spend huge...

102

INTERAGENCY FIELD TEST & EVALUATION OF WIND TURBINE - RADAR INTERFEREN...  

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

the tests and 2) summaries of three field tests designed to measure the impact of wind turbines on current air surveillance radars and the effectiveness of private sector...

103

Wind Turbine Generator System Safety and Function Test Report for the Entegrity EW50 Wind Turbine  

SciTech Connect (OSTI)

This report summarizes the results of a safety and function test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2012-11-01T23:59:59.000Z

104

Wind Turbine Generator System Safety and Function Test Report for the Ventera VT10 Wind Turbine  

SciTech Connect (OSTI)

This report summarizes the results of a safety and function test that NREL conducted on the Ventera VT10 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2012-11-01T23:59:59.000Z

105

Ris-R-1093(EN) European Wind Turbine Testing  

E-Print Network [OSTI]

Risø-R-1093(EN) European Wind Turbine Testing Procedure Developments Task 2: Power Quality Poul #12;Contents Preface 5 1 Introduction 6 2 Standards and measurement procedures 6 3 Wind turbines 7 3 The present report describes the work done in the power quality subtask of the European Wind Turbine Testing

106

Duration Test Report for the Entegrity EW50 Wind Turbine  

SciTech Connect (OSTI)

This report summarizes the results of a duration test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2012-12-01T23:59:59.000Z

107

Ris-R-1209(EN) European Wind Turbine Testing  

E-Print Network [OSTI]

Risø-R-1209(EN) European Wind Turbine Testing Procedure Developments Task 1: Measurement Method to Verify Wind Turbine Performance Character- istics Raymond Hunter RES Task coordinator Troels Friis assessment and wind turbine power performance testing. A standards maintenance team is revising the current

108

Wind Turbine Generator System Power Performance Test Report for the Entegrity EW50 Wind Turbine  

SciTech Connect (OSTI)

Report on the results of the power performance test that the National Renewable Energy Laboratory (NREL) conducted on Entegrity Wind System Inc.'s EW50 small wind turbine.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2011-05-01T23:59:59.000Z

109

Program Management for Large Scale Engineering Programs  

E-Print Network [OSTI]

The goal of this whitepaper is to summarize the LAI research that applies to program management. The context of most of the research discussed in this whitepaper are large-scale engineering programs, particularly in the ...

Oehmen, Josef

110

Toward Improved Support for Loosely Coupled Large Scale Simulation Workflows  

SciTech Connect (OSTI)

High-performance computing (HPC) workloads are increasingly leveraging loosely coupled large scale simula- tions. Unfortunately, most large-scale HPC platforms, including Cray/ALPS environments, are designed for the execution of long-running jobs based on coarse-grained launch capabilities (e.g., one MPI rank per core on all allocated compute nodes). This assumption limits capability-class workload campaigns that require large numbers of discrete or loosely coupled simulations, and where time-to-solution is an untenable pacing issue. This paper describes the challenges related to the support of fine-grained launch capabilities that are necessary for the execution of loosely coupled large scale simulations on Cray/ALPS platforms. More precisely, we present the details of an enhanced runtime system to support this use case, and report on initial results from early testing on systems at Oak Ridge National Laboratory.

Boehm, Swen [ORNL] [ORNL; Elwasif, Wael R [ORNL] [ORNL; Naughton, III, Thomas J [ORNL; Vallee, Geoffroy R [ORNL] [ORNL

2014-01-01T23:59:59.000Z

111

Large Scale Mining of Molecular Fragments with Wildcards  

E-Print Network [OSTI]

Large Scale Mining of Molecular Fragments with Wildcards Heiko Hofer1 , Christian Borgelt2 a novel molecule will be active or inactive, so that future chemical tests can be focused on the most molecular fragments to discriminate between active and inactive molecules. In this paper we present two

Borgelt, Christian

112

Wind Turbine Safety and Function Test Report for the Mariah Windspire Wind Turbine  

SciTech Connect (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers to wind energy expansion by providing independent testing results for small wind turbines (SWT). In total, five turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests performed on the turbines, including power performance, duration, noise, and power-quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. The test equipment includes a Mariah Windspire wind turbine mounted on a monopole tower. L&E Machine manufactured the turbine in the United States. The inverter was manufactured separately by Technology Driven Products in the United States. The system was installed by the NWTC site operations group with guidance and assistance from Mariah Power.

Huskey, A.; Bowen, A.; Jager, D.

2010-07-01T23:59:59.000Z

113

Sparkr Blade Test Centre Modal Analysis of Wind Turbine Blades  

E-Print Network [OSTI]

Sparkær Blade Test Centre Modal Analysis of Wind Turbine Blades Modal analysis is the process the modes constitute a complete dynamic description of the wind turbine blade. The modes of vibration represent the inherent dynamic properties of the wind turbine blade. The range of applications for modal

114

Test application of a semi-objective approach to wind forecasting for wind energy applications  

SciTech Connect (OSTI)

The test application of the semi-objective (S-O) wind forecasting technique at three locations is described. The forecasting sites are described as well as site-specific forecasting procedures. Verification of the S-O wind forecasts is presented, and the observed verification results are interpreted. Comparisons are made between S-O wind forecasting accuracy and that of two previous forecasting efforts that used subjective wind forecasts and model output statistics. (LEW)

Wegley, H.L.; Formica, W.J.

1983-07-01T23:59:59.000Z

115

Power Performance Test Report for the SWIFT Wind Turbine  

SciTech Connect (OSTI)

This report summarizes the results of a power performance test that NREL conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 12: Power Performance Measurements of Electricity Producing Wind Turbines, IEC 61400-12-1 Ed.1.0, 2005-12. However, because the SWIFT is a small turbine as defined by IEC, NREL also followed Annex H that applies to small wind turbines. In these summary results, wind speed is normalized to sea-level air density.

Mendoza, I.; Hur, J.

2012-12-01T23:59:59.000Z

116

South Carolina Opens Nation's Largest Wind Drivetrain Testing...  

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

Carolina. The facility will help test and validate new turbines, particularly for offshore wind- helping to speed deployment of next generation energy technology, reduce...

117

South Carolina Opens Nation's Largest Wind Drivetrain Testing...  

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

Institute, the facility will help test and validate new turbines, particularly for offshore wind-helping to speed deployment of next generation energy technology, reduce costs...

118

New Wind Test Facilities Open in Colorado and South Carolina...  

Energy Savers [EERE]

Clemson facility in North Charleston is ideal for testing the larger multi-megawatt wind turbines that both the United States and international manufacturers are developing for...

119

South Carolina Opens Nation's Largest Wind Drivetrain Testing...  

Office of Environmental Management (EM)

makes it ideal for American and international companies to testing larger offshore wind turbines. Supported by a 47 million Energy Department investment as well as about 60...

120

Dual-Axis Resonance Testing of Wind Turbine Blades  

Energy Innovation Portal (Marketing Summaries) [EERE]

Wind turbine blades must undergo strength and fatigue testing in order to be rated and marketed appropriately. Presently, wind turbine blades are fatigue-tested in the flapwise direction and in the edgewise direction independently. This testing involves placing the blades through 1 to 10 million or more load or fatigue cycles, which may take 3 to 12 months or more to complete for each tested direction. There is a need for blade testing techniques that are less expensive to use and require...

2014-07-28T23:59:59.000Z

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


121

Duration Test Report for the Viryd CS8 Wind Turbine  

SciTech Connect (OSTI)

This report summarizes the results of a duration noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with Clause 9.4 of the International Electrotechnical Commission's (IEC) standard, Wind turbines - Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed. 2.0:2006-03. NREL researchers evaluated the turbine based on structural integrity and material degradation, quality of environmental protection, and dynamic behavior.

Roadman, J.; Murphy, M.; van Dam, J.

2013-06-01T23:59:59.000Z

122

Duration Test Report for the Ventera VT10 Wind Turbine  

SciTech Connect (OSTI)

This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small wind turbines. Five turbines were tested at the National Wind Technology Center (NWTC) at the National Renewable Energy Laboratory (NREL) as a part of round one of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality. Test results will provide manufacturers with reports that can be used to fulfill part of the requirements for small wind turbine certification. The test equipment included a grid-connected Ventera Energy Corporation VT10 wind turbine mounted on an 18.3-m (60-ft) self-supporting lattice tower manufactured by Rohn.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2013-06-01T23:59:59.000Z

123

Safety and Function Test Report for the SWIFT Wind Turbine  

SciTech Connect (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. Three turbines where selected for testing at the National Wind Technology Center (NWTC) as a part of round two of the Small Wind Turbine Independent Testing project. Safety and Function testing is one of up to 5 tests that may be performed on the turbines. Other tests include power performance, duration, noise, and power quality. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification.

Mendoza, I.; Hur, J.

2013-01-01T23:59:59.000Z

124

Duration Test Report for the SWIFT Wind Turbine  

SciTech Connect (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. Three turbines where selected for testing at the National Wind Technology Center (NWTC) as a part of round two of the Small Wind Turbine Independent Testing project. Duration testing is one of up to 5 tests that may be performed on the turbines. Other tests include power performance, safety and function, noise, and power quality. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification.

Mendoza, I.; Hur, J.

2013-01-01T23:59:59.000Z

125

Wind Turbine Generator System Duration Test Report for the Gaia-Wind 11 kW Wind Turbine  

SciTech Connect (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Renewable Energy Laboratory's (NRELs) National Wind Technology Center (NWTC) as a part of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11 kW wind turbine mounted on an 18 m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark, although the company is based in Scotland. The system was installed by the NWTC Site Operations group with guidance and assistance from Gaia-Wind.

Huskey, A.; Bowen, A.; Jager, D.

2010-09-01T23:59:59.000Z

126

Large scale structure of the Universe: Introduction  

E-Print Network [OSTI]

The changes of main paradigms on the structure and evolution of the Universe are reviewed. Two puzzles of the modern cosmology, the mean density of matter and the regularity of the Universe on large scales, as well as the possibility to solve these puzzles by the introduction of more complicated form of inflation, are discussed.

J. Einasto

1997-11-26T23:59:59.000Z

127

Dark Matter and Large Scale Structure  

E-Print Network [OSTI]

A review of the study of dark matter and large scale structure of the Universe at Tartu Observatory is given. Tartu astronomers have participated in this development, starting from Ernst "Opik and Grigori Kuzmin, and continuing with the present generation of astronomers. Our goal was to understand better the structure, origin and evolution of the Universe.

J. Einasto

2000-12-07T23:59:59.000Z

128

7, 1553315563, 2007 Large-scale  

E-Print Network [OSTI]

the Pacific, correlations with CO, CO2, CH4, and C2Cl4 were dif- fuse overall, but recognizable on flights out Chemistry and Physics Discussions Factors influencing the large-scale distribution of Hg in the Mexico City the Intercontinental Chemical Transport Experiment Phase B (INTEX-B) cam- paign in spring 2006. Flights were conducted

Paris-Sud XI, Université de

129

The Phoenix series large scale LNG pool fire experiments.  

SciTech Connect (OSTI)

The increasing demand for natural gas could increase the number and frequency of Liquefied Natural Gas (LNG) tanker deliveries to ports across the United States. Because of the increasing number of shipments and the number of possible new facilities, concerns about the potential safety of the public and property from an accidental, and even more importantly intentional spills, have increased. While improvements have been made over the past decade in assessing hazards from LNG spills, the existing experimental data is much smaller in size and scale than many postulated large accidental and intentional spills. Since the physics and hazards from a fire change with fire size, there are concerns about the adequacy of current hazard prediction techniques for large LNG spills and fires. To address these concerns, Congress funded the Department of Energy (DOE) in 2008 to conduct a series of laboratory and large-scale LNG pool fire experiments at Sandia National Laboratories (Sandia) in Albuquerque, New Mexico. This report presents the test data and results of both sets of fire experiments. A series of five reduced-scale (gas burner) tests (yielding 27 sets of data) were conducted in 2007 and 2008 at Sandia's Thermal Test Complex (TTC) to assess flame height to fire diameter ratios as a function of nondimensional heat release rates for extrapolation to large-scale LNG fires. The large-scale LNG pool fire experiments were conducted in a 120 m diameter pond specially designed and constructed in Sandia's Area III large-scale test complex. Two fire tests of LNG spills of 21 and 81 m in diameter were conducted in 2009 to improve the understanding of flame height, smoke production, and burn rate and therefore the physics and hazards of large LNG spills and fires.

Simpson, Richard B.; Jensen, Richard Pearson; Demosthenous, Byron; Luketa, Anay Josephine; Ricks, Allen Joseph; Hightower, Marion Michael; Blanchat, Thomas K.; Helmick, Paul H.; Tieszen, Sheldon Robert; Deola, Regina Anne; Mercier, Jeffrey Alan; Suo-Anttila, Jill Marie; Miller, Timothy J.

2010-12-01T23:59:59.000Z

130

Large-scale anisotropy in stably stratified rotating flows  

SciTech Connect (OSTI)

We present results from direct numerical simulations of the Boussinesq equations in the presence of rotation and/or stratification, both in the vertical direction. The runs are forced isotropically and randomly at small scales and have spatial resolutions of up to $1024^3$ grid points and Reynolds numbers of $\\approx 1000$. We first show that solutions with negative energy flux and inverse cascades develop in rotating turbulence, whether or not stratification is present. However, the purely stratified case is characterized instead by an early-time, highly anisotropic transfer to large scales with almost zero net isotropic energy flux. This is consistent with previous studies that observed the development of vertically sheared horizontal winds, although only at substantially later times. However, and unlike previous works, when sufficient scale separation is allowed between the forcing scale and the domain size, the total energy displays a perpendicular (horizontal) spectrum with power law behavior compatible with $\\sim k_\\perp^{-5/3}$, including in the absence of rotation. In this latter purely stratified case, such a spectrum is the result of a direct cascade of the energy contained in the large-scale horizontal wind, as is evidenced by a strong positive flux of energy in the parallel direction at all scales including the largest resolved scales.

Marino, Dr. Raffaele [National Center for Atmospheric Research (NCAR); Mininni, Dr. Pablo D. [Universidad de Buenos Aires, Argentina; Rosenberg, Duane L [ORNL; Pouquet, Dr. Annick [National Center for Atmospheric Research (NCAR)

2014-01-01T23:59:59.000Z

131

North Wind 4-kW wind-system development. Phase II. Fabrication and test  

SciTech Connect (OSTI)

This report presents the results of Phase II (testing and fabrication) of a program funded by the US Department of Energy to design, fabricate, and test a cost-effective wind system in the 3 to 6 kW class. During Phase II, using the design developed during Phase I, a prototype 4 kW machine was fabricated and tested in Waitsfield, Vermont. Several problems were encountered and subsequently analyzed. Design modifications, including the use of a larger alternator, are described. Test performed by North Wind and by Rockwell International (which monitored the program) demonstrated the predicted performance characteristics and the validity of the North Wind design.

Lynch, J.; Coleman, C.; Mayer, D.J.

1983-01-01T23:59:59.000Z

132

Materials Science and Materials Chemistry for Large Scale Electrochemi...  

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

Science and Materials Chemistry for Large Scale Electrochemical Energy Storage: From Transportation to Electrical Grid Materials Science and Materials Chemistry for Large Scale...

133

Hybrid Parallelism for Volume Rendering at Large Scale at NERSC  

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

Volume Rendering at Large Scale Hybrid Parallelism for Volume Rendering at Large Scale volrend-swes.png We studied the performance and scalability characteristics of hybrid''...

134

WIND TURBINE DRIVETRAIN TEST FACILITY DATA ACQUISITION SYSTEM  

SciTech Connect (OSTI)

The Wind Turbine Drivetrain Test Facility (WTDTF) is a state-of-the-art industrial facility used for testing wind turbine drivetrains and generators. Large power output wind turbines are primarily installed for off-shore wind power generation. The facility includes two test bays: one to accommodate turbine nacelles up to 7.5 MW and one for nacelles up to 15 MW. For each test bay, an independent data acquisition system (DAS) records signals from various sensors required for turbine testing. These signals include resistance temperature devices, current and voltage sensors, bridge/strain gauge transducers, charge amplifiers, and accelerometers. Each WTDTF DAS also interfaces with the drivetrain load applicator control system, electrical grid monitoring system and vibration analysis system.

Mcintosh, J.

2012-01-03T23:59:59.000Z

135

National Wind Tecnology Center Provides Dual Axis Resonant Blade Testing  

SciTech Connect (OSTI)

NREL's Structural Testing Laboratory at the National Wind Technology Center (NWTC) provides experimental laboratories, computer facilities for analytical work, space for assembling components and turbines for atmospheric testing as well as office space for industry researchers. Fort Felker, center director at the NWTC, discusses NREL's state-of-the-art structural testing capabilities and shows a flapwise and edgewise blade test in progress.

Felker, Fort

2013-11-13T23:59:59.000Z

136

National Wind Tecnology Center Provides Dual Axis Resonant Blade Testing  

ScienceCinema (OSTI)

NREL's Structural Testing Laboratory at the National Wind Technology Center (NWTC) provides experimental laboratories, computer facilities for analytical work, space for assembling components and turbines for atmospheric testing as well as office space for industry researchers. Fort Felker, center director at the NWTC, discusses NREL's state-of-the-art structural testing capabilities and shows a flapwise and edgewise blade test in progress.

Felker, Fort

2014-06-10T23:59:59.000Z

137

Quantum noise in large-scale coherent nonlinear photonic circuits  

E-Print Network [OSTI]

A semiclassical simulation approach is presented for studying quantum noise in large-scale photonic circuits incorporating an ideal Kerr nonlinearity. A circuit solver is used to generate matrices defining a set of stochastic differential equations, in which the resonator field variables represent random samplings of the Wigner quasi-probability distributions. Although the semiclassical approach involves making a large-photon-number approximation, tests on one- and two-resonator circuits indicate satisfactory agreement between the semiclassical and full-quantum simulation results in the parameter regime of interest. The semiclassical model is used to simulate random errors in a large-scale circuit that contains 88 resonators and hundreds of components in total, and functions as a 4-bit ripple counter. The error rate as a function of on-state photon number is examined, and it is observed that the quantum fluctuation amplitudes do not increase as signals propagate through the circuit, an important property for scalability.

Charles Santori; Jason S. Pelc; Raymond G. Beausoleil; Nikolas Tezak; Ryan Hamerly; Hideo Mabuchi

2014-05-27T23:59:59.000Z

138

Establishment of Small Wind Regional Test Centers: Preprint  

SciTech Connect (OSTI)

The rapid growth of the small wind turbine (SWT) market is attracting numerous entrants. Small wind turbine purchasers now have many options but often lack information (such as third-party certification) to select a quality turbine. Most SWTs do not have third-party certification due to the expense and difficulty of the certification process. Until recently, the only SWT certification bodies were in Europe. In North America, testing has been limited to a small number of U.S. Department of Energy (DOE) subsidized tests conducted at the National Wind Technology Center (NWTC) under the ongoing Independent Testing Project. Within the past few years, the DOE, National Renewable Energy Lab (NREL), and some states have worked with the North American SWT industry to create a SWT certification infrastructure. The goal is to increase the number of certified turbines and gain greater consumer confidence in SWT technology. The American Wind Energy Association (AWEA) released the AWEA Small Wind Turbine Performance and Safety Standard (AWEA Standard 9.1 - 2009) in December 2009. The Small Wind Certification Council (SWCC), a North American certification body, began accepting applications for certification to the AWEA standard in February 2010. To reduce certification testing costs, DOE/NREL is providing financial and technical assistance for an initial round of tests at four SWT test sites which were selected via a competitive solicitation. The four organizations selected are Windward Engineering (Utah), The Alternative Energy Institute at West Texas A&M (Texas), a consortium consisting of Kansas State University and Colby Community College (Kansas), and Intertek (New York). Each organization will test two small wind turbines as part of their respective subcontract with DOE/NREL. The testing results will be made publically available. The goal is to establish a lower-cost U.S. small wind testing capability that will lead to increased SWT certification.

Jimenez, T.; Forsyth, T.; Huskey, A.; Mendoza, I.; Sinclair, K.; Smith, J.

2011-03-01T23:59:59.000Z

139

Large-Scale PV Integration Study  

SciTech Connect (OSTI)

This research effort evaluates the impact of large-scale photovoltaic (PV) and distributed generation (DG) output on NV Energy’s electric grid system in southern Nevada. It analyzes the ability of NV Energy’s generation to accommodate increasing amounts of utility-scale PV and DG, and the resulting cost of integrating variable renewable resources. The study was jointly funded by the United States Department of Energy and NV Energy, and conducted by a project team comprised of industry experts and research scientists from Navigant Consulting Inc., Sandia National Laboratories, Pacific Northwest National Laboratory and NV Energy.

Lu, Shuai; Etingov, Pavel V.; Diao, Ruisheng; Ma, Jian; Samaan, Nader A.; Makarov, Yuri V.; Guo, Xinxin; Hafen, Ryan P.; Jin, Chunlian; Kirkham, Harold; Shlatz, Eugene; Frantzis, Lisa; McClive, Timothy; Karlson, Gregory; Acharya, Dhruv; Ellis, Abraham; Stein, Joshua; Hansen, Clifford; Chadliev, Vladimir; Smart, Michael; Salgo, Richard; Sorensen, Rahn; Allen, Barbara; Idelchik, Boris

2011-07-29T23:59:59.000Z

140

1 National Roadmap Committee for Large-Scale Research Facilities the netherlands' roadmap for large-scale research facilities  

E-Print Network [OSTI]

#12;1 National Roadmap Committee for Large-Scale Research Facilities the netherlands' roadmap for large-scale research facilities #12;2 National Roadmap Committee for Large-Scale Research Facilities1 by Roselinde Supheert) #12;3 National Roadmap Committee for Large-Scale Research Facilities The Netherlands

Horn, David

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


141

Data analysis method for wind turbine dynamic response testing  

SciTech Connect (OSTI)

The Wind Research Branch at the Solar Energy Research Institute (SERI) has developed an efficient data analysis package for personal computer use in response to growing needs of the wind turbine industry and SERI's Cooperative Field Test Program. This new software is used by field test engineers to examine wind turbine performance and loads during testing, as well as by data analysts for detailed post-processing. The Wind Data Analysis Tool Set, WINDATS, has been written as a collection of tools that fall into two general groups. First, the preparatory tools perform subsection, filtering, decimation, preaveraging, scaling, and derivation of new channels. Second, analysis tools are used for mean removal, linear detrending, azimuth averaging and removal, per-rev averaging, binning, and spectral analysis. The input data file can be a standard ASCII file as is generated by most data acquisition software. 9 refs., 10 figs.

Olsen, T.L.; Hock, S.M.

1989-06-01T23:59:59.000Z

142

Large-scale Intelligent Transporation Systems simulation  

SciTech Connect (OSTI)

A prototype computer system has been developed which defines a high-level architecture for a large-scale, comprehensive, scalable simulation of an Intelligent Transportation System (ITS) capable of running on massively parallel computers and distributed (networked) computer systems. The prototype includes the modelling of instrumented ``smart`` vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide 2-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on ANL`s IBM SP-X parallel computer system for large scale problems. A novel feature of our design is that vehicles will be represented by autonomus computer processes, each with a behavior model which performs independent route selection and reacts to external traffic events much like real vehicles. With this approach, one will be able to take advantage of emerging massively parallel processor (MPP) systems.

Ewing, T.; Canfield, T.; Hannebutte, U.; Levine, D.; Tentner, A.

1995-06-01T23:59:59.000Z

143

NREL: Wind Research - Small Wind Turbine Independent Testing  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData andFleet Test andField VerificationPossibleResearchSmall

144

E-Print Network 3.0 - atlantic wind test Sample Search Results  

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

wind test Search Powered by Explorit Topic List Advanced Search Sample search results for: atlantic wind test Page: << < 1 2 3 4 5 > >> 1 The Potential for Wind Energy in Atlantic...

145

Structural testing of the North Wind 250 composite rotor joint  

SciTech Connect (OSTI)

The North Wind 250 wind turbine is under development at Northern Power Systems (NPS) in Moretown, VT. The turbine uses a unique, flow-through, teetered-rotor design. This design eliminates structural discontinuities at the blade/hub interface by fabricating the rotor as one continuous structural element. To accomplish this, the two blade spars are joined at the center of the rotor using a proprietary bonding technique. Fatigue tests were conducted on the full-scale rotor joint at the National Renewable Energy Laboratory (NREL). Subsequent tests are now underway to test the full-scale rotor and hub assembly to verify the design assumptions. The test articles were mounted in dedicated test fixtures. For the joint test, a constant moment was generated across the joint and parent material. Hydraulic actuators applied sinusoidal loading to the test article at levels equivalent to 90% of the extreme wind load for over one million cycles. When the loading was increased to 112% of the extreme wind load, the joint failed by buckling. Strain levels were monitored at 14 locations inside and outside of the blade joint during the test. The tests were used to qualify this critical element of the rotor for field testing and to provide information needed to improve the structural design of the joint.

Musial, W; Link, H [National Renewable Energy Lab., Golden, CO (United States); Coleman, C [Northern Power Systems, Moretown, VT (United States)

1994-05-01T23:59:59.000Z

146

Large-scale simulations of reionization  

SciTech Connect (OSTI)

We use cosmological simulations to explore the large-scale effects of reionization. Since reionization is a process that involves a large dynamic range--from galaxies to rare bright quasars--we need to be able to cover a significant volume of the universe in our simulation without losing the important small scale effects from galaxies. Here we have taken an approach that uses clumping factors derived from small scale simulations to approximate the radiative transfer on the sub-cell scales. Using this technique, we can cover a simulation size up to 1280h{sup -1} Mpc with 10h{sup -1} Mpc cells. This allows us to construct synthetic spectra of quasars similar to observed spectra of SDSS quasars at high redshifts and compare them to the observational data. These spectra can then be analyzed for HII region sizes, the presence of the Gunn-Peterson trough, and the Lyman-{alpha} forest.

Kohler, Katharina; /JILA, Boulder /Fermilab; Gnedin, Nickolay Y.; /Fermilab; Hamilton, Andrew J.S.; /JILA, Boulder

2005-11-01T23:59:59.000Z

147

Wind Testing and Certification | Department of Energy  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched FerromagnetismWaste and MaterialsWenjun DengWISPWind Industry Soars toWind

148

America's Wind Testing Facilities | Department of Energy  

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

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Ownedof EnergyAdvanced Biofuels |National Wind Technology Center - Colorado 1

149

Robust Morphological Measures for Large-Scale Structure  

E-Print Network [OSTI]

A complete family of statistical descriptors for the morphology of large--scale structure based on Minkowski--Functionals is presented. These robust and significant measures can be used to characterize the local and global morphology of spatial patterns formed by a coverage of point sets which represent galaxy samples. Basic properties of these measures are highlighted and their relation to the `genus statistics' is discussed. Test models like a Poissonian point process and samples generated from a Voronoi--model are put into perspective.

T. Buchert

1994-12-17T23:59:59.000Z

150

Wind Technology Testing Center Earns A2LA Accreditation for Blade...  

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

Wind Technology Testing Center Earns A2LA Accreditation for Blade Testing Wind Technology Testing Center Earns A2LA Accreditation for Blade Testing October 1, 2012 - 12:16pm...

151

FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy...  

Energy Savers [EERE]

FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects August 21, 2013 - 12:00am...

152

Synchronization of coupled large-scale Boolean networks  

SciTech Connect (OSTI)

This paper investigates the complete synchronization and partial synchronization of two large-scale Boolean networks. First, the aggregation algorithm towards large-scale Boolean network is reviewed. Second, the aggregation algorithm is applied to study the complete synchronization and partial synchronization of large-scale Boolean networks. Finally, an illustrative example is presented to show the efficiency of the proposed results.

Li, Fangfei, E-mail: li-fangfei@163.com [Department of Mathematics, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, Shanghai 200237 (China)] [Department of Mathematics, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, Shanghai 200237 (China)

2014-03-15T23:59:59.000Z

153

Aerodynamic testing of a rotating wind turbine blade  

SciTech Connect (OSTI)

Aerodynamic, load, flow-visualization, and inflow measurements were taken on a downwind horizontal-axis wind turbine (HAWT). A video camera mounted on the rotor recorded video images of tufts attached to the low-pressure side of the blade. Strain gages, mounted every 10% of the blade's span, provided load and pressure measurements. Pressure taps at 32 chordwise positions recorded pressure distributions. Wind inflow was measured via a vertical-plane array of anemometers located 10 m upwind. The objectives of the test were to address whether airfoil pressure distributions measured on a rotating blade differed from those measured in the wind tunnel, if radial flow near or in the boundary layer of the airfoil affected pressure distributions, if dynamic stall could result in increased dynamic loads, and if the location of the separation boundary measured on the rotating blade agreed with that measured in two-dimensional flow in the wind tunnel. 6 refs., 9 figs., 1 tab.

Butterfield, C.P.; Nelsen, E.N.

1990-01-01T23:59:59.000Z

154

Theoretical Tools for Large Scale Structure  

E-Print Network [OSTI]

We review the main theoretical aspects of the structure formation paradigm which impinge upon wide angle surveys: the early universe generation of gravitational metric fluctuations from quantum noise in scalar inflaton fields; the well understood and computed linear regime of CMB anisotropy and large scale structure (LSS) generation; the weakly nonlinear regime, where higher order perturbation theory works well, and where the cosmic web picture operates, describing an interconnected LSS of clusters bridged by filaments, with membranes as the intrafilament webbing. Current CMB+LSS data favour the simplest inflation-based $\\Lambda$CDM models, with a primordial spectral index within about 5% of scale invariant and $\\Omega_\\Lambda \\approx 2/3$, similar to that inferred from SNIa observations, and with open CDM models strongly disfavoured. The attack on the nonlinear regime with a variety of N-body and gas codes is described, as are the excursion set and peak-patch semianalytic approaches to object collapse. The ingredients are mixed together in an illustrative gasdynamical simulation of dense supercluster formation.

J. R. Bond; L. Kofman; D. Pogosyan; J. Wadsley

1998-10-06T23:59:59.000Z

155

Performance Testing of a Small Vertical-Axis Wind Turbine , S. Tullis2  

E-Print Network [OSTI]

Performance Testing of a Small Vertical-Axis Wind Turbine R. Bravo1 , S. Tullis2 , S. Ziada3 of electric production [1]. Although most performance testing for small-scale wind turbines is conducted vertical-axis wind turbines (VAWT) in urban settings, full-scale wind tunnel testing of a prototype 3.5 k

Tullis, Stephen

156

Cooperative field test program for wind systems. Final report  

SciTech Connect (OSTI)

The objectives of the Federal Wind Energy Program, managed by the US Department of Energy (DOE), are (1) to assist industry and utilities in achieving a multi-regional US market penetration of wind systems, and (2) to establish the United States as the world leader in the development of advanced wind turbine technology. In 1984, the program conducted a series of planning workshops with representatives from the wind energy industry to obtain input on the Five-Year Research Plan then being prepared by DOE. One specific suggestion that came out of these meetings was that the federal program should conduct cooperative research tests with industry to enhance the technology transfer process. It was also felt that the active involvement of industry in DOE-funded research would improve the state of the art of wind turbine technology. DOE established the Cooperative Field Test Program (CFTP) in response to that suggestion. This program was one of the first in DOE to feature joint industry-government research test teams working toward common objectives.

Bollmeier, W.S. II; Dodge, D.M.

1992-03-01T23:59:59.000Z

157

2010 Wind Technologies Market Report  

E-Print Network [OSTI]

AWEA?s Wind Energy Weekly, DOE/EPRI?s Turbine Verification10% Wind Energy Penetration New large-scale 9 wind turbineswind energy continues to decline as a result of lower wind turbine

Wiser, Ryan

2012-01-01T23:59:59.000Z

158

2011 Wind Technologies Market Report  

E-Print Network [OSTI]

AWEA’s Wind Energy Weekly, DOE/EPRI’s Turbine Verification10% Wind Energy Penetration New large-scale 8 wind turbinesTurbine Market Report. Washington, D.C. : American Wind Energy

Bolinger, Mark

2013-01-01T23:59:59.000Z

159

Field Testing: Independent, Accredited Testing and Validation for the Wind Industry (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the field testing capabilities at the National Wind Technology Center (NWTC). NREL's specialized facilities and personnel at the NWTC provide the U.S. wind industry with scientific and engineering support that has proven critical to the development of wind energy for U.S. energy needs. The NWTC's specialized field-testing capabilities have evolved over 30 years of continuous support by the U.S. Department of Energy Wind and Hydropower Technologies Program and long standing industry partnerships. The NWTC provides wind industry manufacturers, developers, and operators with turbine and component testing all in one convenient location. Although industry utilizes sophisticated modeling tools to design and optimize turbine configurations, there are always limitations in modeling capabilities, and testing is a necessity to ensure performance and reliability. Designs require validation and testing is the only way to determine if there are flaws. Prototype testing is especially important in capturing manufacturing flaws that might require fleet-wide retrofits. The NWTC works with its industry partners to verify the performance and reliability of wind turbines that range in size from 400 Watts to 3 megawatts. Engineers conduct tests on components and full-scale turbines in laboratory environments and in the field. Test data produced from these tests can be used to validate turbine design codes and simulations that further advance turbine designs.

Not Available

2011-11-01T23:59:59.000Z

160

Skewness and Kurtosis in Large-Scale Cosmic Fields  

E-Print Network [OSTI]

In this paper, I present the calculation of the third and fourth moments of both the distribution function of the large--scale density and the large--scale divergence of the velocity field, $\\theta$. These calculations are made by the mean of perturbative calculations assuming Gaussian initial conditions and are expected to be valid in the linear or quasi linear regime. The moments are derived for a top--hat window function and for any cosmological parameters $\\Omega$ and $\\Lambda$. It turns out that the dependence with $\\Lambda$ is always very weak whereas the moments of the distribution function of the divergence are strongly dependent on $\\Omega$. A method to measure $\\Omega$ using the skewness of this field has already been presented by Bernardeau et al. (1993). I show here that the simultaneous measurement of the skewness and the kurtosis allows to test the validity of the gravitational instability scenario hypothesis. Indeed there is a combination of the first three moments of $\\theta$ that is almost independent of the cosmological parameters $\\Omega$ and $\\Lambda$, $${(-3^2) \\over ^2}\\approx 1.5,$$ (the value quoted is valid when the index of the power spectrum at the filtering scale is close to -1) so that any cosmic velocity field created by gravitational instabilities should verify such a property.

F. Bernardeau

1993-12-13T23:59:59.000Z

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


161

NREL: Wind Research - Field Test Sites  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData andFleet Test and

162

Dual-axis resonance testing of wind turbine blades  

DOE Patents [OSTI]

An apparatus (100) for fatigue testing test articles (104) including wind turbine blades. The apparatus (100) includes a test stand (110) that rigidly supports an end (106) of the test article (104). An actuator assembly (120) is attached to the test article (104) and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (104), with the first and second directions being perpendicular to a longitudinal axis. A controller (130) transmits first and second sets of displacement signals (160, 164) to the actuator assembly (120) at two resonant frequencies of the test system (104). The displacement signals (160, 164) initiate the actuator assembly (120) to impart the forcing loads to concurrently oscillate the test article (104) in the first and second directions. With turbine blades, the blades (104) are resonant tested concurrently for fatigue in the flapwise and edgewise directions.

Hughes, Scott; Musial, Walter; White, Darris

2014-01-07T23:59:59.000Z

163

NREL: Wind Research - Dynamometer Test Facilities  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData andFleet Test and EvaluationManagementWorking withDynamometer

164

NREL: Wind Research - Regional Test Centers  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData andFleet Test andField VerificationPossible

165

NREL: Wind Research - Structural Testing Laboratory  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions andData andFleet Test andField

166

Probing the imprint of interacting dark energy on very large scales  

E-Print Network [OSTI]

The observed galaxy power spectrum acquires relativistic corrections from lightcone effects, and these corrections grow on very large scales. Future galaxy surveys in optical, infrared and radio bands will probe increasingly large wavelength modes and reach higher redshifts. In order to exploit the new data on large scales, an accurate analysis requires inclusion of the relativistic effects. This is especially the case for primordial non-Gaussianity and for extending tests of dark energy models to horizon scales. Here we investigate the latter, focusing on models where the dark energy interacts non-gravitationally with dark matter. Interaction in the dark sector can also lead to large-scale deviations in the power spectrum. If the relativistic effects are ignored, the imprint of interacting dark energy will be incorrectly identified and thus lead to a bias in constraints on interacting dark energy on very large scales.

Duniya, Didam; Maartens, Roy

2015-01-01T23:59:59.000Z

167

Wind turbine blade testing system using base excitation  

DOE Patents [OSTI]

An apparatus (500) for fatigue testing elongate test articles (404) including wind turbine blades through forced or resonant excitation of the base (406) of the test articles (404). The apparatus (500) includes a testing platform or foundation (402). A blade support (410) is provided for retaining or supporting a base (406) of an elongate test article (404), and the blade support (410) is pivotally mounted on the testing platform (402) with at least two degrees of freedom of motion relative to the testing platform (402). An excitation input assembly (540) is interconnected with the blade support (410) and includes first and second actuators (444, 446, 541) that act to concurrently apply forces or loads to the blade support (410). The actuator forces are cyclically applied in first and second transverse directions. The test article (404) responds to shaking of its base (406) by oscillating in two, transverse directions (505, 507).

Cotrell, Jason; Thresher, Robert; Lambert, Scott; Hughes, Scott; Johnson, Jay

2014-03-25T23:59:59.000Z

168

Reassessing Wind Potential Estimates for India: Economic and Policy Implications  

E-Print Network [OSTI]

Analysis of Impacts of Wind Integration in the Tamil Nadu2009). Large-Scale Wind Integration Studies in the Unitedon topics such as wind integration, transmission planning,

Phadke, Amol

2012-01-01T23:59:59.000Z

169

Large Scale Computing and Storage Requirements for Nuclear Physics  

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

Science at NERSC HPC Requirements Reviews Requirements for Science: Target 2014 Nuclear Physics (NP) Large Scale Computing and Storage Requirements for Nuclear Physics:...

170

Advancing Cellulosic Ethanol for Large Scale Sustainable Transportation  

E-Print Network [OSTI]

Advancing Cellulosic Ethanol for Large Scale SustainableHydrogen Batteries Nuclear By Lee Lynd, Dartmouth Ethanol •Ethanol, ethyl alcohol, fermentation ethanol, or just “

Wyman, C

2007-01-01T23:59:59.000Z

171

Solving large scale polynomial convex problems on \\ell_1/nuclear ...  

E-Print Network [OSTI]

Oct 24, 2012 ... Solving large scale polynomial convex problems on \\ell_1/nuclear norm balls by randomized first-order algorithms. Aharon Ben-Tal (abental ...

Aharon Ben-Tal

2012-10-24T23:59:59.000Z

172

Large Scale GSHP as Alternative Energy for American Farmers  

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

Large Scale GSHP as Alternative Energy for American Farmers Shawn Yunsheng Xu University of Missouri May 18, 2010 This presentation does not contain any proprietary confidential,...

173

Large Scale GSHP as Alternative Energy for American Farmers Geothermal...  

Open Energy Info (EERE)

Scale GSHP as Alternative Energy for American Farmers Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale GSHP as Alternative...

174

Optimization Online - Large-Scale Linear Programming Techniques ...  

E-Print Network [OSTI]

Feb 12, 2002 ... Large-Scale Linear Programming Techniques for the Design of Protein Folding Potentials. Michael Wagner (mwagner ***at*** odu.edu)

Michael Wagner

2002-02-12T23:59:59.000Z

175

Test plan for the 34 meter vertical axis wind turbine test bed located at Bushland, Texas  

SciTech Connect (OSTI)

A plan is presented for the testing and evaluation of a new 500 kw vertical axis wind turbine test bed. The plan starts with the initial measurements made during construction, proceeds through evaluation of the design, the development of control methods, and finally to the test bed phase where new concepts are evaluated and in-depth studies are performed.

Stephenson, W.A.

1986-12-01T23:59:59.000Z

176

Advanced Control Design for Wind Turbines; Part I: Control Design, Implementation, and Initial Tests  

SciTech Connect (OSTI)

The purpose of this report is to give wind turbine engineers information and examples of the design, testing through simulation, field implementation, and field testing of advanced wind turbine controls.

Wright, A. D.; Fingersh, L. J.

2008-03-01T23:59:59.000Z

177

Testing Small Wind Turbine Generators: Design of a Driving Dynamometer Stephen Rehmeyer Pepe  

E-Print Network [OSTI]

Testing Small Wind Turbine Generators: Design of a Driving Dynamometer by Stephen Rehmeyer Pepe Sc, Berkeley Spring 2007 #12;Testing Small Wind Turbine Generators: Design of a Driving Dynamometer Copyright c 2007 by Stephen Rehmeyer Pepe #12;Abstract Testing Small Wind Turbine Generators: Design of a Driving

Kammen, Daniel M.

178

Large-Scale Eucalyptus Energy Farms and Power Cogeneration1  

E-Print Network [OSTI]

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

Standiford, Richard B.

179

Large Scale Parameter Sweep Studies Using Distributed Matlab  

E-Print Network [OSTI]

1 Large Scale Parameter Sweep Studies Using Distributed Matlab Vikas Argod Graduate Assistant 225. The implementation is done in Matlab. The discussion extends to large scale problems of similar type using distributed matlab. Use of distributed matlab reduced computation time significantly

Bjørnstad, Ottar Nordal

180

Attack Containment Framework for Large-Scale Critical Infrastructures  

E-Print Network [OSTI]

Attack Containment Framework for Large-Scale Critical Infrastructures Hoang Nguyen Department-- We present an attack containment framework against value-changing attacks in large-scale critical structure, called attack container, which captures the trust behavior of a group of nodes and assists

Nahrstedt, Klara

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


181

2009 ASME WIND ENERGY SYMPOSIUM Static and Fatigue Testing of Thick Adhesive Joints for  

E-Print Network [OSTI]

1 2009 ASME WIND ENERGY SYMPOSIUM Static and Fatigue Testing of Thick Adhesive Joints for Wind as wind blade size has increased. Typical blade joints use paste adhesives several millimeters thick aircraft, which are also of relevance to wind blades in many instances. The strengths of lap-shear and many

182

Stability Design for the Crane Columns of the Wind Technology Testing Center E. M. Hines1  

E-Print Network [OSTI]

to test wind turbine blades up to 90 m in length. The laboratory is enclosed by eleven steel trussed generation of wind turbine blades for off-shore wind farm development. Whereas the largest blades for land of power per turbine, offshore wind turbines are expected to reach power outputs as high as 10 MW

Hines, Eric

183

Development and testing of improved statistical wind power forecasting methods.  

SciTech Connect (OSTI)

Wind power forecasting (WPF) provides important inputs to power system operators and electricity market participants. It is therefore not surprising that WPF has attracted increasing interest within the electric power industry. In this report, we document our research on improving statistical WPF algorithms for point, uncertainty, and ramp forecasting. Below, we provide a brief introduction to the research presented in the following chapters. For a detailed overview of the state-of-the-art in wind power forecasting, we refer to [1]. Our related work on the application of WPF in operational decisions is documented in [2]. Point forecasts of wind power are highly dependent on the training criteria used in the statistical algorithms that are used to convert weather forecasts and observational data to a power forecast. In Chapter 2, we explore the application of information theoretic learning (ITL) as opposed to the classical minimum square error (MSE) criterion for point forecasting. In contrast to the MSE criterion, ITL criteria do not assume a Gaussian distribution of the forecasting errors. We investigate to what extent ITL criteria yield better results. In addition, we analyze time-adaptive training algorithms and how they enable WPF algorithms to cope with non-stationary data and, thus, to adapt to new situations without requiring additional offline training of the model. We test the new point forecasting algorithms on two wind farms located in the U.S. Midwest. Although there have been advancements in deterministic WPF, a single-valued forecast cannot provide information on the dispersion of observations around the predicted value. We argue that it is essential to generate, together with (or as an alternative to) point forecasts, a representation of the wind power uncertainty. Wind power uncertainty representation can take the form of probabilistic forecasts (e.g., probability density function, quantiles), risk indices (e.g., prediction risk index) or scenarios (with spatial and/or temporal dependence). Statistical approaches to uncertainty forecasting basically consist of estimating the uncertainty based on observed forecasting errors. Quantile regression (QR) is currently a commonly used approach in uncertainty forecasting. In Chapter 3, we propose new statistical approaches to the uncertainty estimation problem by employing kernel density forecast (KDF) methods. We use two estimators in both offline and time-adaptive modes, namely, the Nadaraya-Watson (NW) and Quantilecopula (QC) estimators. We conduct detailed tests of the new approaches using QR as a benchmark. One of the major issues in wind power generation are sudden and large changes of wind power output over a short period of time, namely ramping events. In Chapter 4, we perform a comparative study of existing definitions and methodologies for ramp forecasting. We also introduce a new probabilistic method for ramp event detection. The method starts with a stochastic algorithm that generates wind power scenarios, which are passed through a high-pass filter for ramp detection and estimation of the likelihood of ramp events to happen. The report is organized as follows: Chapter 2 presents the results of the application of ITL training criteria to deterministic WPF; Chapter 3 reports the study on probabilistic WPF, including new contributions to wind power uncertainty forecasting; Chapter 4 presents a new method to predict and visualize ramp events, comparing it with state-of-the-art methodologies; Chapter 5 briefly summarizes the main findings and contributions of this report.

Mendes, J.; Bessa, R.J.; Keko, H.; Sumaili, J.; Miranda, V.; Ferreira, C.; Gama, J.; Botterud, A.; Zhou, Z.; Wang, J. (Decision and Information Sciences); (INESC Porto)

2011-12-06T23:59:59.000Z

184

False Discovery Control in Large-Scale Spatial Multiple Wenguang Sun  

E-Print Network [OSTI]

is one of the six criteria pollutants regulated by the US EPA under the Clean Air Act and has been linkedFalse Discovery Control in Large-Scale Spatial Multiple Testing Wenguang Sun University of Southern and computational framework for false discovery control in multiple testing of spatial signals. We consider both

Cai, T. Tony

185

Development of an integrated in-situ remediation technology. Topical report for task No. 12 and 13 entitled: Large scale field test of the Lasagna{trademark} process, September 26, 1994--May 25, 1996  

SciTech Connect (OSTI)

Contamination in low permeability soils poses a significant technical challenge to in-situ remediation efforts. Poor accessibility to the contaminants and difficulty in delivery of treatment reagents have rendered existing in-situ treatments such as bioremediation, vapor extraction, pump and treat rather ineffective when applied to low permeability soils present at many contaminated sites. This technology is an integrated in-situ treatment in which established geotechnical methods are used to instant degradation zones directly in the contaminated soil and electroosmosis is utilized to move the contaminants back and forth through those zones until the treatment is completed. This topical report summarizes the results of the field experiment conducted at the Paducah Gaseous Diffusion Plant in Paducah, KY. The test site covered 15 feet wide by 10 feet across and 15 feet deep with steel panels as electrodes and wickdrains containing granular activated carbon as treatment zone& The electrodes and treatment zones were installed utilizing innovative adaptation of existing emplacement technologies. The unit was operated for four months, flushing TCE by electroosmosis from the soil into the treatment zones where it was trapped by the activated carbon. The scale up from laboratory units to this field scale was very successful with respect to electrical parameters as weft as electroosmotic flow. Soil samples taken throughout the site before and after the test showed over 98% TCE removal, with most samples showing greater than 99% removal.

Athmer, C.J.; Ho, Sa V.; Hughes, B.M. [and others

1997-04-01T23:59:59.000Z

186

2009 Wind Technologies Market Report  

E-Print Network [OSTI]

AWEA’s Wind Energy Weekly, DOE/EPRI’s Turbine Verification10% Wind Energy Penetration New large-scale 10 wind turbineswind energy became more challenging, orders for new turbines

Wiser, Ryan

2010-01-01T23:59:59.000Z

187

2009 Wind Technologies Market Report  

E-Print Network [OSTI]

AWEA). 2010b. AWEA Small Wind Turbine Global Market Survey,html David, A. 2009. Wind Turbines: Industry and Tradewhich new large-scale wind turbines were installed in 2009 (

Wiser, Ryan

2010-01-01T23:59:59.000Z

188

Stabilization of Large Scale Structure by Adhesive Gravitational Clustering  

E-Print Network [OSTI]

The interplay between gravitational and dispersive forces in a multi-streamed medium leads to an effect which is exposed in the present note as the genuine driving force of stabilization of large-scale structure. The conception of `adhesive gravitational clustering' is advanced to interlock the fairly well-understood epoch of formation of large-scale structure and the onset of virialization into objects that are dynamically in equilibrium with their large-scale structure environment. The classical `adhesion model' is opposed to a class of more general models traced from the physical origin of adhesion in kinetic theory.

Thomas Buchert

1999-08-13T23:59:59.000Z

189

Wind Tunnel and Field Test of Three 2D Sonic Anemometers  

E-Print Network [OSTI]

Wind Tunnel and Field Test of Three 2D Sonic Anemometers Wiel Wauben R&D Information and Observation Technology, KNMI September 17, 2007 #12;#12;Wind Tunnel and Field Test of Three 2D Sonic.....................................................................................................1 2. Wind sensors

Stoffelen, Ad

190

Sparkr Blade Test Centre Wind turbines with a rotor diameter exceed-  

E-Print Network [OSTI]

Sparkær Blade Test Centre Wind turbines with a rotor diameter exceed- ing 2 metres must have a type of a wind turbine. Failure of a rotor blade in service often involves damage of the entire turbine operating type cer- tification systems for wind turbines. Reg. no. 427 The Sparkær Blade Test Centre became

191

Ris-R-1392(EN) Full scale testing of wind turbine blade  

E-Print Network [OSTI]

Risø-R-1392(EN) Full scale testing of wind turbine blade to failure - flapwise loading Erik R F. Sørensen Risø National Laboratory, Roskilde June 2004 #12;Abstract A 25m wind turbine blade test of a 25m Vestas wind turbine blade. The major results of the entire project can be found

192

Line formation in the inner winds of classical T Tauri stars: testing the conical wind solution  

E-Print Network [OSTI]

We present the emission line profile models of hydrogen and helium based on the results from axisymmetric magnetohydrodynamics (MHD) simulations of the wind formed near the disk-magnetosphere boundary of classical T Tauri stars (CTTSs). We extend the previous outflow models of `the conical wind' by Romanova et al. to include a well defined magnetospheric accretion funnel flow which is essential for modelling the optical and near-infrared hydrogen and helium lines of CTTSs. Our MHD model shows outflows in conical shape with a half opening angle about 35 degrees. The flow properties such as the maximum outflow speed in the conical wind, maximum inflow speed in the accretion funnel, mass-accretion and mass-loss rates are comparable to those found in a typical CTTS. The density, velocity and temperature from the MHD simulations are used in a separate radiative transfer model to predict the line profiles and test the consistency of the MHD models with observations. The line profiles are computed with various combi...

Kurosawa, Ryuichi

2012-01-01T23:59:59.000Z

193

Wind Program Announces $2 Million to Develop and Field Test Wind...  

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

Wind Program today announced 2 million in funding to advance technologies that address wind development's potential impacts on wildlife. This funding will help address...

194

Advanced Wind Energy Projects Test Facility Moving to Texas Tech...  

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

The Lubbock site will include an initial installation of two 225-kilowatt wind turbines and three anemometer towers, with the potential to expand to nine or more wind...

195

Upcoming Funding Opportunity to Develop and Field Test Wind Energy...  

Energy Savers [EERE]

and operating wind energy facilities in locations with sensitive bat species. As wind energy continues to grow as a renewable source of energy for communities throughout...

196

The new Wind Technology Test Center is the only facility in the nation capable of testing wind turbine blades up to  

E-Print Network [OSTI]

turbine blades up to 90 meters in length. A critical factor to wind turbine design and development is the ability to test new designs, components, and materials. In addition, wind turbine blade manufacturers are required to test their blades as part of the turbine certification process. The National Renewable Energy

197

Liberty Turbine Test Wind Farm | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpInc Place:Keystone CleanLaton,LearnLeuppEnergyTurbine Test Wind Farm

198

2014 WIND POWER PROGRAM PEER REVIEW-TEST FACILITIES  

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 on Delicious Rank EERE:YearRound-Up from theDepartment(October-December 2013 issueTest Facilities March 24-27, 2014 Wind

199

Wind Tunnel Tests of Parabolic Trough Solar Collectors: March 2001--August 2003  

SciTech Connect (OSTI)

Conducted extensive wind-tunnel tests on parabolic trough solar collectors to determine practical wind loads applicable to structural design for stress and deformation, and local component design for concentrator reflectors.

Hosoya, N.; Peterka, J. A.; Gee, R. C.; Kearney, D.

2008-05-01T23:59:59.000Z

200

FAST Code Verification of Scaling Laws for DeepCwind Floating Wind System Tests: Preprint  

SciTech Connect (OSTI)

This paper investigates scaling laws that were adopted for the DeepCwind project for testing three different floating wind systems at 1/50 scale in a wave tank under combined wind and wave loading.

Jain, A.; Robertson, A. N.; Jonkman, J. M.; Goupee, A. J.; Kimball, R. W.; Swift, A. H. P.

2012-04-01T23:59:59.000Z

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


201

DAMAGE DETECTION METHODS ON WIND TURBINE BLADE TESTING WITH WIRED AND WIRELESS ACCELEROMETER SENSORS  

E-Print Network [OSTI]

DAMAGE DETECTION METHODS ON WIND TURBINE BLADE TESTING WITH WIRED AND WIRELESS ACCELEROMETER turbine blade. We compare the data collected from the wireless sensors against wired sensors for nonstationary blade excitations. KEYWORDS : Structural Health Monitoring, Damage Detection, Wind Turbine

Paris-Sud XI, Université de

202

How Three Retail Buyers Source Large-Scale Solar Electricity  

Office of Energy Efficiency and Renewable Energy (EERE)

Large-scale, non-utility solar power purchase agreements (PPAs) are still a rarity despite the growing popularity of PPAs across the country. In this webinar, participants will learn more about how...

203

Platforms and real options in large-scale engineering systems  

E-Print Network [OSTI]

This thesis introduces a framework and two methodologies that enable engineering management teams to assess the value of real options in programs of large-scale, partially standardized systems implemented a few times over ...

Kalligeros, Konstantinos C., 1976-

2006-01-01T23:59:59.000Z

204

Retroreflective shadowgraph technique for large-scale flow visualization  

E-Print Network [OSTI]

for large-scale flow visualization, the simple shadow- graph can often provide the most robust solution photographed the shadowgram of a blasting-cap ex- plosion outdoors in daylight (see Fig. 6.14a of [1]). One

Settles, Gary S.

205

Surrogate modeling for large-scale black-box systems  

E-Print Network [OSTI]

This research introduces a systematic method to reduce the complexity of large-scale blackbox systems for which the governing equations are unavailable. For such systems, surrogate models are critical for many applications, ...

Liem, Rhea Patricia

2007-01-01T23:59:59.000Z

206

Chemical engineers design, control and optimize large-scale chemical,  

E-Print Network [OSTI]

, Biochemical, Environmental, Petroleum Engineering and Nantoechnology. CHEMICAL&MATERIALSSCIENCE CHE OVERVIEW of Science 131 units · Chemical Engineering (Petroleum) Bachelor of Science 136 units · Chemical Engineering38 Chemical engineers design, control and optimize large-scale chemical, physicochemical

Rohs, Remo

207

Exploration of large scale manufacturing of polydimethylsiloxane (PDMS) microfluidic devices  

E-Print Network [OSTI]

Discussion of the current manufacturing process of polydimethylsiloxane (PDMS) parts and the emergence of PDMS use in biomedical microfluidic devices addresses the need to develop large scale manufacturing processes for ...

Hum, Philip W. (Philip Wing-Jung)

2006-01-01T23:59:59.000Z

208

Data mining techniques for large-scale gene expression analysis  

E-Print Network [OSTI]

Modern computational biology is awash in large-scale data mining problems. Several high-throughput technologies have been developed that enable us, with relative ease and little expense, to evaluate the coordinated expression ...

Palmer, Nathan Patrick

2011-01-01T23:59:59.000Z

209

Streamflow forecasting for large-scale hydrologic systems  

E-Print Network [OSTI]

STREAMFLOW FORECASTING FOR LARGE-SCALE HYDROLOGIC SYSTEMS A Thesis by HAITHAM MUNIR AWWAD Submitted to the Office of Graduate Studies of Texas AkM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... 1991 Major Subject: Civil Engineering STREAMFLOW FORECASTING FOR LARGE-SCALE HYDROLOGIC SYSTEMS A Thesis by HAITHAM MUNIR AWWAD Approved as to style and content by: uan B. Valdes (Chair of Committee) alph A. Wurbs (Member) Marshall J. Mc...

Awwad, Haitham Munir

1991-01-01T23:59:59.000Z

210

Manufactured Home Testing in Simulated and Naturally Occurring High Winds  

SciTech Connect (OSTI)

A typical double-wide manufactured home was tested in simulated and naturally occurring high winds to understand structural behavior and improve performance during severe windstorms. Seven (7) lateral load tests were conducted on a double-wide manufactured home at a remote field test site in Wyoming. An extensive instrumentation package monitored the overall behavior of the home and collected data vital to validating computational software for the manufactured housing industry. The tests were designed to approach the design load of the home without causing structural damage, thus allowing the behavior of the home to be accessed when the home was later exposed to high winds (to 80-mph). The data generally show near-linear initial system response with significant non-linear behavior as the applied loads increase. Load transfer across the marriage line is primarily compression. Racking, while present, is very small. Interface slip and shear displacement along the marriage line are nearly insignificant. Horizontal global displacements reached 0.6 inch. These tests were designed primarily to collect data necessary to calibrate a desktop analysis and design software tool, MHTool, under development at the Idaho National Laboratory specifically for manufactured housing. Currently available analysis tools are, for the most part, based on methods developed for “stick built” structures and are inappropriate for manufactured homes. The special materials utilized in manufactured homes, such as rigid adhesives used in the connection of the sheathing materials to the studs, significantly alter the behavior of manufactured homes under lateral loads. Previous full scale tests of laterally loaded manufactured homes confirm the contention that conventional analysis methods are not applicable. System behavior dominates the structural action of manufactured homes and its prediction requires a three dimensional analysis of the complete unit, including tiedowns. This project was sponsored by the US Department of Energy, US Department of Housing and Urban Development, and the Manufactured Housing Institute. The results of this research can lead to savings in annual losses of life and property by providing validated information to enable the advancement of code requirements and by developing engineering software that can predict and optimize wind resistance.

W. D. Richins; T. K. Larson

2006-08-01T23:59:59.000Z

211

Testing of a 50-kW Wind-Diesel Hybrid System at the National Wind Technology Center  

SciTech Connect (OSTI)

In remote off-grid villages and communities, a reliable power source is important in improving the local quality of life. Villages often use a diesel generator for their power, but fuel can be expensive and maintenance burdensome. Including a wind turbine in a diesel system can reduce fuel consumption and lower maintenance, thereby reducing energy costs. However, integrating the various components of a wind-diesel system, including wind turbine, power conversion system, and battery storage (if applicable), is a challenging task. To further the development of commercial hybrid power systems, the National Renewable Energy Laboratory (NREL), in collaboration with the New World Village Power Corporation (NWVP), tested a NWVP 50-kW wind-diesel hybrid system connected to a 15/50 Atlantic Orient Corporation (AOC) wind turbine. Testing was conducted from October 1995 through March 1996 at the National Wind Technology Center (NWTC). A main objective of the testing was to better understand the application of wind turbines to weak grids typical of small villages. Performance results contained in this report include component characterization, such as power conversion losses for the rotary converter system and battery round trip efficiencies. In addition, system operation over the test period is discussed with special attention given to dynamic issues. Finally, future plans for continued testing and research are discussed.

Corbus, D. A.; Green, H. J.; Allderdice, A.; Rand, K.; Bianchi, J.; Linton, E.

1996-07-01T23:59:59.000Z

212

Holographic principle and large scale structure in the universe  

E-Print Network [OSTI]

A reasonable representation of large scale structure, in a closed universe so large it's nearly flat, can be developed by extending the holographic principle and assuming the bits of information describing the distribution of matter density in the universe remain in thermal equilibrium with the cosmic microwave background radiation. The analysis identifies three levels of self-similar large scale structure, corresponding to superclusters, galaxies, and star clusters, between today's observable universe and stellar systems. The self-similarity arises because, according to the virial theorem, the average gravitational potential energy per unit volume in each structural level is the same and depends only on the gravitational constant. The analysis indicates stellar systems first formed at z\\approx62, consistent with the findings of Naoz et al, and self-similar large scale structures began to appear at redshift z\\approx4. It outlines general features of development of self-similar large scale structures at redshift z<4. The analysis is consistent with observations for angular momentum of large scale structures as a function of mass, and average speed of substructures within large scale structures. The analysis also indicates relaxation times for star clusters are generally less than the age of the universe and relaxation times for more massive structures are greater than the age of the universe.

T. R. Mongan

2011-08-10T23:59:59.000Z

213

Aeroacoustic Testing of Wind Turbine Airfoils: February 20, 2004 - February 19, 2008  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE), working through its National Renewable Energy Laboratory (NREL), is engaged in a comprehensive research effort to improve the understanding of wind turbine aeroacoustics. The motivation for this effort is the desire to exploit the large expanse of low wind speed sites that tend to be close to U.S. load centers. Quiet wind turbines are an inducement to widespread deployment, so the goal of NREL's aeroacoustic research is to develop tools that the U.S. wind industry can use in developing and deploying highly efficient, quiet wind turbines at low wind speed sites. NREL's National Wind Technology Center (NWTC) is implementing a multifaceted approach that includes wind tunnel tests, field tests, and theoretical analyses in direct support of low wind speed turbine development by its industry partners. NWTC researchers are working hand in hand with engineers in industry to ensure that research findings are available to support ongoing design decisions.

Devenport, W.; Burdisso, R. A.; Camargo, H.; Crede, E.; Remillieux, M.; Rasnick, M.; Van Seeters, P.

2010-05-01T23:59:59.000Z

214

Large-Scale Industrial CCS Projects Selected for Continued Testing |  

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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorgeDoesn't Happen to HighJosephNOx Traps forLM2 LNGLakeLand2014)Department

215

Microsoft Word - Vit Plant Large Scale Testing_20110901.doc  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment SurfacesResource Program Preliminary Needs535:UFC 2300.004/2013AprilViA Tru

216

Enertech 2-kW high-reliability wind system. Phase II. Fabrication and testing  

SciTech Connect (OSTI)

A high-reliability wind machine rated for 2 kW in a 9 m/s wind has been developed. Activities are summarized that are centered on the fabrication and testing of prototypes of the wind machine. The test results verified that the wind machine met the power output specification and that the variable-pitch rotor effectively controlled the rotor speed for wind speeds up to 50 mph. Three prototypes of the wind machine were shipped to the Rocky Flats test center in September through November of 1979. Work was also performed to reduce the start-up wind speed. The start-up wind speed to the Enertech facility has been reduced to 4.5 m/s.

Cordes, J A; Johnson, B A

1981-06-01T23:59:59.000Z

217

Ris-R-999(EN) Wind Tunnel Test of the RIS-1  

E-Print Network [OSTI]

coefficients and wake rake pressure measurements provided the total drag coefficient. Wind tunnel corrections of blades for stall regulated wind turbines with a Reynolds number betweenRisø-R-999(EN) Wind Tunnel Test of the RISØ-1 Airfoil Peter Fuglsang, Ioannis Antoniou, Christian

218

Developing a Practical Wind Tunnel Test Engineering Course for Undergraduate Aerospace Engineering Students  

E-Print Network [OSTI]

This thesis describes the development and assessment of an undergraduate wind tunnel test engineering course utilizing the 7ft by 10ft Oran W. Nicks Low Speed Wind Tunnel (LSWT). Only 5 other universities in the United States have a wind tunnel...

Recla, Benjamin Jeremiah

2013-04-19T23:59:59.000Z

219

Large-scale simulations of complex physical systems  

SciTech Connect (OSTI)

Scientific computing has become a tool as vital as experimentation and theory for dealing with scientific challenges of the twenty-first century. Large scale simulations and modelling serve as heuristic tools in a broad problem-solving process. High-performance computing facilities make possible the first step in this process - a view of new and previously inaccessible domains in science and the building up of intuition regarding the new phenomenology. The final goal of this process is to translate this newly found intuition into better algorithms and new analytical results.In this presentation we give an outline of the research themes pursued at the Scientific Computing Laboratory of the Institute of Physics in Belgrade regarding large-scale simulations of complex classical and quantum physical systems, and present recent results obtained in the large-scale simulations of granular materials and path integrals.

Belic, A. [Scientific Computing Laboratory, Institute of Physics, Pregrevica 118, 11080 Belgrade (Serbia and Montenegro)

2007-04-23T23:59:59.000Z

220

On Local and Global Centrality in Large Scale Networks  

E-Print Network [OSTI]

Estimating influential nodes in large scale networks including but not limited to social networks, biological networks, communication networks, emerging smart grids etc. is a topic of fundamental interest. To understand influences of nodes in a network, a classical metric is centrality within which there are multiple specific instances including degree centrality, closeness centrality, betweenness centrality and more. As of today, existing algorithms to identify nodes with high centrality measures operate upon the entire (or rather global) network, resulting in high computational complexity. In this paper, we design efficient algorithms for determining the betweenness centrality in large scale networks by taking advantage of the modular topology exhibited by most of these large scale networks. Very briefly, modular topologies are those wherein the entire network appears partitioned into distinct modules (or clusters or communities), wherein nodes within the module (that likely share highly similar profiles) h...

Das, Sima

2014-01-01T23:59:59.000Z

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


221

Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator: Preprint  

SciTech Connect (OSTI)

The objective of this paper is to present test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility. In this paper, different types of wind power plant models based on the Western Electricity Coordinating Council Wind Generator Modeling Group's standardization efforts are implemented on a real-time digital simulator, and different test cases are used to gauge their grid integration capability. The low-voltage ride through and reactive power support capability and limitations of wind turbine generators under different grid conditions are explored. Several types of transient events (e.g., symmetrical and unsymmetrical faults, frequency dips) are included in the test cases. The differences in responses from different types of wind turbine are discussed in detail.

Singh, M.; Muljadi, E.; Gevorgian, V.

2012-06-01T23:59:59.000Z

222

Inflationary tensor fossils in large-scale structure  

E-Print Network [OSTI]

Inflation models make specific predictions for a tensor-scalar-scalar three-point correlation, or bispectrum, between one gravitational-wave (tensor) mode and two density-perturbation (scalar) modes. This tensor-scalar-scalar correlation leads to a local power quadrupole, an apparent departure from statistical isotropy in our Universe, as well as characteristic four-point correlations in the current mass distribution in the Universe. So far, the predictions for these observables have been worked out only for single-clock models in which certain consistency conditions between the tensor-scalar-scalar correlation and tensor and scalar power spectra are satisfied. Here we review the requirements on inflation models for these consistency conditions to be satisfied. We then consider several examples of inflation models, such as non-attractor and solid inflation models, in which these conditions are put to the test. In solid inflation the simplest consistency conditions are already violated whilst in the non-attractor model we find that, contrary to the standard scenario, the tensor-scalar-scalar correlator probes directly relevant model-dependent information. We work out the predictions for observables in these models. For non-attractor inflation we find an apparent local quadrupolar departure from statistical isotropy in large-scale structure but that this power quadrupole decreases very rapidly at smaller scales. The consistency of the CMB quadrupole with statistical isotropy then constrains the distance scale that corresponds to the transition from the non-attractor to attractor phase of inflation to be larger than the currently observable horizon. Solid inflation predicts clustering fossils signatures in the current galaxy distribution that may be large enough to be detectable with forthcoming, and possibly even current, galaxy surveys.

Emanuela Dimastrogiovanni; Matteo Fasiello; Donghui Jeong; Marc Kamionkowski

2014-07-30T23:59:59.000Z

223

The Cost of Transmission for Wind Energy in the United States: A Review of Transmission Planning Studies.  

E-Print Network [OSTI]

ZLWK:LQG3RZHU´&RQIHUHQFHRQ Wind Power for the 21 st Century,Large-scale baseload wind power in China. Natural Resourceseconomics of large-scale wind power in a carbon constrained

Wiser, Ryan

2014-01-01T23:59:59.000Z

224

Wind Turbine Blade Test Definition of the DeWind DW90 Rotor Blade: Cooperative Research and Development Final Report, CRADA Number CRD-09-326  

SciTech Connect (OSTI)

This CRADA was developed as a funds-in CRADA with DeWind to assess the suitability of facilities and equipment at the NWTC for performing certification blade testing on wind turbine blades made from advanced materials. DeWind produces a wind turbine blade which includes the use of high-strength and stiffness materials. NREL and DeWind had a mutual interest in defining the necessary facilities, equipment, and test methods for testing large wind turbine blades which incorporate advanced materials and adaptive structures, as the demands on test equipment and infrastructure are greater than current capabilities. Work under this CRADA would enable DeWind to verify domestic capability for certification-class static and fatigue testing, while NREL would be able to identify and develop specialized test capabilities based on the test requirements.

Hughes, S.

2012-05-01T23:59:59.000Z

225

First International Workshop on Grid Simulator Testing of Wind Turbine Drivetrains: Workshop Proceedings  

SciTech Connect (OSTI)

This report summarizes the proceedings of the First International Workshop on Grid Simulator Testing of Wind Turbine Drivetrains, held from June 13 to 14, 2013, at the National Renewable Energy Laboratory's National Wind Technology Center, located south of Boulder, Colorado. The workshop was sponsored by the U.S. Department of Energy and cohosted by the National Renewable Energy Laboratory and Clemson University under ongoing collaboration via a cooperative research and development agreement. The purpose of the workshop was to provide a forum to discuss the research, testing needs, and state-of-the-art apparatuses involved in grid compliance testing of utility-scale wind turbine generators. This includes both dynamometer testing of wind turbine drivetrains ('ground testing') and field testing grid-connected wind turbines. Four sessions followed by discussions in which all attendees of the workshop were encouraged to participate comprised the workshop.

Gevorgian, V.; Link, H.; McDade, M.; Mander, A.; Fox, J. C.; Rigas, N.

2013-11-01T23:59:59.000Z

226

Evolving Large Scale UAV Communication System Adrian Agogino  

E-Print Network [OSTI]

Evolving Large Scale UAV Communication System Adrian Agogino UCSC at NASA Ames Mail Stop 269 Corvallis, OR 97331 Kagan.Tumer@ oregonstate.edu ABSTRACT Unmanned Aerial Vehicles (UAVs) have traditionally powered unmanned aerial vehicles (UAVs) to fly long term missions at high altitudes. This will revo

Tumer, Kagan

227

Modeling emergent large-scale structures of barchan dune fields  

E-Print Network [OSTI]

that cannot be readily explained by examining the dynamics at the scale of single dunes, or by appealingModeling emergent large-scale structures of barchan dune fields S. Worman , A.B. Murray , R for a range of field-scale phenomena including isolated patches of dunes and heterogeneous arrangements

Claudin, Philippe

228

Spatial Energy Balancing in Large-scale Wireless Multihop Networks  

E-Print Network [OSTI]

Spatial Energy Balancing in Large-scale Wireless Multihop Networks Seung Jun Baek and Gustavo de is on optimizing trade-offs between the energy cost of spreading traffic and the improved spatial balance of energy. We propose a parameterized family of energy balancing strategies for grids and approximate

de Veciana, Gustavo

229

Parallel Stochastic Gradient Algorithms for Large-Scale Matrix ...  

E-Print Network [OSTI]

On large-scale matrix completion tasks, Jellyfish is orders of magnitude more efficient than ...... NNLS was written in Matlab, and some of the functions are available .... Figure 6: Low-Rank Factorization Graph on (A) Movielens1M and (B)

2013-03-21T23:59:59.000Z

230

Lessons from Large-Scale Renewable Energy Integration Studies: Preprint  

SciTech Connect (OSTI)

In general, large-scale integration studies in Europe and the United States find that high penetrations of renewable generation are technically feasible with operational changes and increased access to transmission. This paper describes other key findings such as the need for fast markets, large balancing areas, system flexibility, and the use of advanced forecasting.

Bird, L.; Milligan, M.

2012-06-01T23:59:59.000Z

231

Computer Science Colloquium Designing a Large-Scale Quantum Architecture  

E-Print Network [OSTI]

Computer Science Colloquium Designing a Large-Scale Quantum Architecture Speaker: Tzvetan Metodi of traditional architectures, to develop a model for a computationally relevant quantum system that provides on the development of balanced architectural models of organization and specialization for emerging quantum computing

232

ORNL 2013-G00021/tcc Large Scale Graphene Production  

E-Print Network [OSTI]

ORNL 2013-G00021/tcc 02.2013 Large Scale Graphene Production UT-B ID 201102606 Technology Summary Graphene is an emerging one-atom-thick carbon material which has the potential for a wide range research, graphene has quickly attained the status of a wonder nanomaterial and continued to draw

233

Materialized community ground models for large-scale earthquake simulation  

E-Print Network [OSTI]

Materialized community ground models for large-scale earthquake simulation Steven W. Schlosser to ground motion sim- ulations, in which ground model datasets are fully materi- alized into octress stored as a service techniques in which scientific computation and storage services become more tightly intertwined. 1

Shewchuk, Jonathan

234

Developing A Grid Portal For Large-scale Reservoir Studies  

E-Print Network [OSTI]

Developing A Grid Portal For Large-scale Reservoir Studies 1 Center for Computation & Technology 2 uncertainty. · Advantages of grid technology · Proposed Solution of the UCoMS Team · What is a Portal? · UCo of reservoir uncertainty... Petroleum drilling consist of many uncertainties. Main objective is to optimize

Allen, Gabrielle

235

Large Scale Simulation of Tor: Modelling a Global Passive Adversary  

E-Print Network [OSTI]

. Implementing global passive adversary attacks on currently deployed low latency anonymous networks designs have been developed which attempt to apply mixes to low latency traffic. The most widelyLarge Scale Simulation of Tor: Modelling a Global Passive Adversary Gavin O' Gorman and Stephen

Blott, Stephen

236

Large Scale Energy Storage: From Nanomaterials to Large Systems  

E-Print Network [OSTI]

Large Scale Energy Storage: From Nanomaterials to Large Systems Wednesday October 26, 2011, Babbio energy storage devices. Specifically, this talk discusses 1) the challenges for grid scale of emergent technologies with ultralow costs on new energy storage materials and mechanisms. Dr. Jun Liu

Fisher, Frank

237

Seamlessly Integrating Software & Hardware Modelling for Large-Scale Systems  

E-Print Network [OSTI]

Engineering, with the math- ematical modelling approach, Modelica, to address the software/hardware integration problem. The environment and hardware components are modelled in Modelica and integrated software-hardware codesign, large-scale sys- tems, Behavior Engineering, Modelica. 1. Introduction

Zhao, Yuxiao

238

Chemical engineers design, control and optimize large-scale chemical,  

E-Print Network [OSTI]

Emphasis in Nanotechnology · ChemicalEngineering Emphasis in Petroleum Engineering · ChemicalEngineering38 Chemical engineers design, control and optimize large-scale chemical, physicochemical and electronics fields. Chemical Engineers are employed in areas as diverse as the chemical, materials, energy

Rohs, Remo

239

Chemical engineers design, control and optimize large-scale chemical,  

E-Print Network [OSTI]

· ChemicalEngineering (Nanotechnology) Bachelor of Science 131 units · ChemicalEngineering(Petroleum38 Chemical engineers design, control and optimize large-scale chemical, physicochemical and electronics fields. Chemical Engineers are employed in areas as diverse as the chemical, pharmaceutical

Rohs, Remo

240

Chemical engineers design, control and optimize large-scale chemical,  

E-Print Network [OSTI]

in Nanotechnology · ChemicalEngineering Emphasis in Petroleum Engineering · ChemicalEngineering Emphasis in Polymers38 Chemical engineers design, control and optimize large-scale chemical, physicochemical and electronics fields. Chemical Engineers are employed in areas as diverse as the chemical, pharmaceutical

Rohs, Remo

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


241

Wind Turbine Drivetrain Condition Monitoring During GRC Phase 1 and Phase 2 Testing  

SciTech Connect (OSTI)

This report will present the wind turbine drivetrain condition monitoring (CM) research conducted under the phase 1 and phase 2 Gearbox Reliability Collaborative (GRC) tests. The rationale and approach for this drivetrain CM research, investigated CM systems, test configuration and results, and a discussion on challenges in wind turbine drivetrain CM and future research and development areas, will be presented.

Sheng, S.; Link, H.; LaCava, W.; van Dam, J.; McNiff, B.; Veers, P.; Keller, J.; Butterfield, S.; Oyague, F.

2011-10-01T23:59:59.000Z

242

Kaman 40-kW wind system. Phase II. Fabrication and tests. Volume II. Technical report  

SciTech Connect (OSTI)

A program is underway to design, fabricate and test a horizontal axis Wind Turbine Generator (WTG) capable of producing 40 kW electrical output power in a 20 mph wind. Results are presented of the program effort covering fabrication and testing of the Wing Turbine Generator designed earlier. A minimum of difficulties were experienced during fabrication and, after successful completion of Contractor tests through 20 mph winds, the WTG was shipped to Rocky Flats, assembled and operated there. The 40 kW WTG is presently undergoing extended tests at Rockwell's Rocky Flats test facility.

Howes, H; Perley, R

1981-01-01T23:59:59.000Z

243

Colorado and South Carolina: New Wind Test Facilities Open |...  

Energy Savers [EERE]

Act, the new facilities will accelerate the development and deployment of next-generation wind energy technologies for both offshore and land-based applications. Located on a...

244

An implementation and test of the NEXRAD Transverse Wind algorithm  

E-Print Network [OSTI]

by 5 km array (BOX) size was selected with 50 percent overlap. Figure 17 shows the computed wind vectors for each 5 km box. The overall wind flow pattern is much the same as shown by the 10 km arrays. The strong westerly winds in the extreme...) sizes to extremes. Figure 21 shows the result of using a 35 by 35 km box. There were 1849 data points in the box and only a single wind vector was produced. With a 50 percent overlap, there was insufficient space within the storm boundary for any...

Bensinger, Richard Bruce

2012-06-07T23:59:59.000Z

245

Wind Speed Forecasting for Power System Operation  

E-Print Network [OSTI]

In order to support large-scale integration of wind power into current electric energy system, accurate wind speed forecasting is essential, because the high variation and limited predictability of wind pose profound challenges to the power system...

Zhu, Xinxin

2013-07-22T23:59:59.000Z

246

Enertech 15-kW wind-system development. Phase II. Fabrication and test  

SciTech Connect (OSTI)

This Phase II report presents a description of the Enertech 15 kW prototype wind system hardware fabrication; results of component tests; and results of preliminary testing conducted at Norwich, VT and the RF Wind Energy Research Center. In addition, the assembly sequence is documented. During testing, the unit experienced several operational problems, but testing proved the design concept and demonstrated the system's ability to meet the contract design specifications for power output.

Zickefoose, C.R.

1982-12-01T23:59:59.000Z

247

Testing Active Power Control from Wind Power at the National Wind Technology Center (NWTC) (Presentation)  

SciTech Connect (OSTI)

In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.

Ela, E.

2011-05-01T23:59:59.000Z

248

A first large-scale flood inundation forecasting model  

SciTech Connect (OSTI)

At present continental to global scale flood forecasting focusses on predicting at a point discharge, with little attention to the detail and accuracy of local scale inundation predictions. Yet, inundation is actually the variable of interest and all flood impacts are inherently local in nature. This paper proposes a first large scale flood inundation ensemble forecasting model that uses best available data and modeling approaches in data scarce areas and at continental scales. The model was built for the Lower Zambezi River in southeast Africa to demonstrate current flood inundation forecasting capabilities in large data-scarce regions. The inundation model domain has a surface area of approximately 170k km2. ECMWF meteorological data were used to force the VIC (Variable Infiltration Capacity) macro-scale hydrological model which simulated and routed daily flows to the input boundary locations of the 2-D hydrodynamic model. Efficient hydrodynamic modeling over large areas still requires model grid resolutions that are typically larger than the width of many river channels that play a key a role in flood wave propagation. We therefore employed a novel sub-grid channel scheme to describe the river network in detail whilst at the same time representing the floodplain at an appropriate and efficient scale. The modeling system was first calibrated using water levels on the main channel from the ICESat (Ice, Cloud, and land Elevation Satellite) laser altimeter and then applied to predict the February 2007 Mozambique floods. Model evaluation showed that simulated flood edge cells were within a distance of about 1 km (one model resolution) compared to an observed flood edge of the event. Our study highlights that physically plausible parameter values and satisfactory performance can be achieved at spatial scales ranging from tens to several hundreds of thousands of km2 and at model grid resolutions up to several km2. However, initial model test runs in forecast mode revealed that it is crucial to account for basin-wide hydrological response time when assessing lead time performances notwithstanding structural limitations in the hydrological model and possibly large inaccuracies in precipitation data.

Schumann, Guy J-P; Neal, Jeffrey C.; Voisin, Nathalie; Andreadis, Konstantinos M.; Pappenberger, Florian; Phanthuwongpakdee, Kay; Hall, Amanda C.; Bates, Paul D.

2013-11-04T23:59:59.000Z

249

Performance Health Monitoring of Large-Scale Systems  

SciTech Connect (OSTI)

This report details the progress made on the ASCR funded project Performance Health Monitoring for Large Scale Systems. A large-­?scale application may not achieve its full performance potential due to degraded performance of even a single subsystem. Detecting performance faults, isolating them, and taking remedial action is critical for the scale of systems on the horizon. PHM aims to develop techniques and tools that can be used to identify and mitigate such performance problems. We accomplish this through two main aspects. The PHM framework encompasses diagnostics, system monitoring, fault isolation, and performance evaluation capabilities that indicates when a performance fault has been detected, either due to an anomaly present in the system itself or due to contention for shared resources between concurrently executing jobs. Software components called the PHM Control system then build upon the capabilities provided by the PHM framework to mitigate degradation caused by performance problems.

Rajamony, Ram

2014-11-20T23:59:59.000Z

250

Prototype Vector Machine for Large Scale Semi-Supervised Learning  

SciTech Connect (OSTI)

Practicaldataminingrarelyfalls exactlyinto the supervisedlearning scenario. Rather, the growing amount of unlabeled data poses a big challenge to large-scale semi-supervised learning (SSL). We note that the computationalintensivenessofgraph-based SSLarises largely from the manifold or graph regularization, which in turn lead to large models that are dificult to handle. To alleviate this, we proposed the prototype vector machine (PVM), a highlyscalable,graph-based algorithm for large-scale SSL. Our key innovation is the use of"prototypes vectors" for effcient approximation on both the graph-based regularizer and model representation. The choice of prototypes are grounded upon two important criteria: they not only perform effective low-rank approximation of the kernel matrix, but also span a model suffering the minimum information loss compared with the complete model. We demonstrate encouraging performance and appealing scaling properties of the PVM on a number of machine learning benchmark data sets.

Zhang, Kai; Kwok, James T.; Parvin, Bahram

2009-04-29T23:59:59.000Z

251

Diffuse Gamma-Ray Emission from Large Scale Structures  

E-Print Network [OSTI]

For more than a decade now the complete origin of the diffuse gamma-ray emission background (EGRB) has been unknown. Major components like unresolved star-forming galaxies (making 10GeV. Moreover, we show that, even though the gamma-ray emission arising from structure formation shocks at galaxy clusters is below previous estimates, these large scale shocks can still give an important, and even dominant at high energies, contribution to the EGRB. Future detections of cluster gamma-ray emission would make our upper limit of the extragalactic gamma-ray emission from structure-formation process, a firm prediction, and give us deeper insight in evolution of these large scale shock.

Dobardzic, Aleksandra

2012-01-01T23:59:59.000Z

252

Adapting to Limitations of a Wind Tunnel Test Facility in the Aerodynamic Testing of a new UAV  

E-Print Network [OSTI]

Adapting to Limitations of a Wind Tunnel Test Facility in the Aerodynamic Testing of a new UAV Dr K section for aerodynamic tests of aircraft models and aerodynamic devices. Improvements over the years have aerodynamic testing facility, albeit with much reduced capability. This paper reports on initial progress

Wong, K. C.

253

Suppression of large-scale perturbations by stiff solid  

E-Print Network [OSTI]

Evolution of large-scale scalar perturbations in the presence of stiff solid (solid with pressure to energy density ratio > 1/3) is studied. If the solid dominated the dynamics of the universe long enough, the perturbations could end up suppressed by as much as several orders of magnitude. To avoid too steep large-angle power spectrum of CMB, radiation must have prevailed over the solid long enough before recombination.

Vladimír Balek; Matej Škovran

2015-01-28T23:59:59.000Z

254

Suppression of large-scale perturbations by stiff solid  

E-Print Network [OSTI]

Evolution of large-scale scalar perturbations in the presence of stiff solid (solid with pressure to energy density ratio > 1/3) is studied. If the solid dominated the dynamics of the universe long enough, the perturbations could end up suppressed by as much as several orders of magnitude. To avoid too steep large-angle power spectrum of CMB, radiation must have prevailed over the solid long enough before recombination.

Balek, Vladimír

2015-01-01T23:59:59.000Z

255

Large-Scale Optimization for Bayesian Inference in Complex Systems  

SciTech Connect (OSTI)

The SAGUARO (Scalable Algorithms for Groundwater Uncertainty Analysis and Robust Optimization) Project focused on the development of scalable numerical algorithms for large-scale Bayesian inversion in complex systems that capitalize on advances in large-scale simulation-based optimization and inversion methods. The project was a collaborative effort among MIT, the University of Texas at Austin, Georgia Institute of Technology, and Sandia National Laboratories. The research was directed in three complementary areas: efficient approximations of the Hessian operator, reductions in complexity of forward simulations via stochastic spectral approximations and model reduction, and employing large-scale optimization concepts to accelerate sampling. The MIT--Sandia component of the SAGUARO Project addressed the intractability of conventional sampling methods for large-scale statistical inverse problems by devising reduced-order models that are faithful to the full-order model over a wide range of parameter values; sampling then employs the reduced model rather than the full model, resulting in very large computational savings. Results indicate little effect on the computed posterior distribution. On the other hand, in the Texas--Georgia Tech component of the project, we retain the full-order model, but exploit inverse problem structure (adjoint-based gradients and partial Hessian information of the parameter-to-observation map) to implicitly extract lower dimensional information on the posterior distribution; this greatly speeds up sampling methods, so that fewer sampling points are needed. We can think of these two approaches as ``reduce then sample'' and ``sample then reduce.'' In fact, these two approaches are complementary, and can be used in conjunction with each other. Moreover, they both exploit deterministic inverse problem structure, in the form of adjoint-based gradient and Hessian information of the underlying parameter-to-observation map, to achieve their speedups.

Willcox, Karen [MIT] [MIT; Marzouk, Youssef [MIT] [MIT

2013-11-12T23:59:59.000Z

256

Large Scale Deployment of Renewables for Electricity Generation  

E-Print Network [OSTI]

).38 The small scale of renewable energy projects multiplies the relative costs incurred through multiple administrative processes. For example, biogas plants in Germany require several parallel permit processes designed to address issues such as EU... -cellulose material. Anaerobic digestion or gasification of biomass produces gas that can be used in similar applications to natural gas. Small-scale biogas production is now a well-established technology and large-scale application is in the advanced stages...

Neuhoff, Karsten

2006-03-14T23:59:59.000Z

257

Geospatial Optimization of Siting Large-Scale Solar Projects  

SciTech Connect (OSTI)

Recent policy and economic conditions have encouraged a renewed interest in developing large-scale solar projects in the U.S. Southwest. However, siting large-scale solar projects is complex. In addition to the quality of the solar resource, solar developers must take into consideration many environmental, social, and economic factors when evaluating a potential site. This report describes a proof-of-concept, Web-based Geographical Information Systems (GIS) tool that evaluates multiple user-defined criteria in an optimization algorithm to inform discussions and decisions regarding the locations of utility-scale solar projects. Existing siting recommendations for large-scale solar projects from governmental and non-governmental organizations are not consistent with each other, are often not transparent in methods, and do not take into consideration the differing priorities of stakeholders. The siting assistance GIS tool we have developed improves upon the existing siting guidelines by being user-driven, transparent, interactive, capable of incorporating multiple criteria, and flexible. This work provides the foundation for a dynamic siting assistance tool that can greatly facilitate siting decisions among multiple stakeholders.

Macknick, J.; Quinby, T.; Caulfield, E.; Gerritsen, M.; Diffendorfer, J.; Haines, S.

2014-03-01T23:59:59.000Z

258

Primordial quantum nonequilibrium and large-scale cosmic anomalies  

E-Print Network [OSTI]

We study incomplete relaxation to quantum equilibrium at long wavelengths, during a pre-inflationary phase, as a possible explanation for the reported large-scale anomalies in the cosmic microwave background (CMB). Our scenario makes use of the de Broglie-Bohm pilot-wave formulation of quantum theory, in which the Born probability rule has a dynamical origin. The large-scale power deficit could arise from incomplete relaxation for the amplitudes of the primordial perturbations. We show, by numerical simulations for a spectator scalar field, that if the pre-inflationary era is radiation dominated then the deficit in the emerging power spectrum will have a characteristic shape (an inverse-tangent dependence on wavenumber k, with oscillations). It is found that our scenario is able to produce a power deficit in the observed region and of the observed (approximate) magnitude for an appropriate choice of cosmological parameters. We also discuss the large-scale anisotropy, which could arise from incomplete relaxation for the phases of the primordial perturbations. We present numerical simulations for phase relaxation, and we show how to define characteristic scales for amplitude and phase nonequilibrium. The extent to which the data might support our scenario is left as a question for future work. Our results suggest that we have a potentially viable model that might explain two apparently independent cosmic anomalies by means of a single mechanism.

Samuel Colin; Antony Valentini

2014-07-31T23:59:59.000Z

259

Microwave backgropund anisotropies, large-scale structure and cosmological parameters  

E-Print Network [OSTI]

We review how the various large-scale data constrain cosmological parameters and, consequently, theories for the origin of large-scale structure in the Universe. We discuss the form of the power spectrum implied by the correlation data of galaxies and argue by comparing the velocity field implied by the distribution of light with the observed velocity flows that the bias parameter, $b$, is likely to be constant in the linear regime. This then allows one to estimate the density parameter, $\\Omega$, and $b$ directly from the \\underline{data} on $\\xi(r)$ and the velocity fields. We show that it is consistent with low values of $\\Omega^{0.6}/b$. We discuss the ways to normalise the optical data at $z\\sim0$ directly to the COBE (or other microwave background) data. The data on high-$z$ \\underline{galaxies} allows one to further constrain the shape of the \\underline{primordial} power spectrum at scales which are non-linear today ($< 8h^{-1}$Mpc) and we discuss the consistency of the data with inflationary models normalised to the large-scale structure observations.

A. Kashlinsky

1993-11-18T23:59:59.000Z

260

Wind-To-Hydrogen Project: Operational Experience, Performance Testing, and Systems Integration  

SciTech Connect (OSTI)

The Wind2H2 system is fully functional and continues to gather performance data. In this report, specifications of the Wind2H2 equipment (electrolyzers, compressor, hydrogen storage tanks, and the hydrogen fueled generator) are summarized. System operational experience and lessons learned are discussed. Valuable operational experience is shared through running, testing, daily operations, and troubleshooting the Wind2H2 system and equipment errors are being logged to help evaluate the reliability of the system.

Harrison, K. W.; Martin, G. D.; Ramsden, T. G.; Kramer, W. E.; Novachek, F. J.

2009-03-01T23:59:59.000Z

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


261

Testing and Modeling of a 3-MW Wind Turbine Using Fully Coupled Simulation Codes (Poster)  

SciTech Connect (OSTI)

This poster describes the NREL/Alstom Wind testing and model verification of the Alstom 3-MW wind turbine located at NREL's National Wind Technology Center. NREL,in collaboration with ALSTOM Wind, is studying a 3-MW wind turbine installed at the National Wind Technology Center(NWTC). The project analyzes the turbine design using a state-of-the-art simulation code validated with detailed test data. This poster describes the testing and the model validation effort, and provides conclusions about the performance of the unique drive train configuration used in this wind turbine. The 3-MW machine has been operating at the NWTC since March 2011, and drive train measurements will be collected through the spring of 2012. The NWTC testing site has particularly turbulent wind patterns that allow for the measurement of large transient loads and the resulting turbine response. This poster describes the 3-MW turbine test project, the instrumentation installed, and the load cases captured. The design of a reliable wind turbine drive train increasingly relies on the use of advanced simulation to predict structural responses in a varying wind field. This poster presents a fully coupled, aero-elastic and dynamic model of the wind turbine. It also shows the methodology used to validate the model, including the use of measured tower modes, model-to-model comparisons of the power curve, and mainshaft bending predictions for various load cases. The drivetrain is designed to only transmit torque to the gearbox, eliminating non-torque moments that are known to cause gear misalignment. Preliminary results show that the drivetrain is able to divert bending loads in extreme loading cases, and that a significantly smaller bending moment is induced on the mainshaft compared to a three-point mounting design.

LaCava, W.; Guo, Y.; Van Dam, J.; Bergua, R.; Casanovas, C.; Cugat, C.

2012-06-01T23:59:59.000Z

262

Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg)  

SciTech Connect (OSTI)

Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg)

William C. Leighty; DOE Project Officer - Keith Bennett

2005-10-04T23:59:59.000Z

263

Safety and Function Test Report for the Viryd CS8 Wind Turbine  

SciTech Connect (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. Several turbines were selected for testing at the National Wind Technology Center (NWTC) at the National Renewable Energy Laboratory (NREL) as a part of the Small Wind Turbine Independent Testing project. Safety and function testing is one of up to five tests that may be performed on the turbines. Other tests include duration, power performance, acoustic noise, and power quality. Viryd Technologies, Inc. of Austin, Texas, was the recipient of the DOE grant and provided the turbine for testing.

Roadman, J.; Murphy, M.; van Dam, J.

2013-10-01T23:59:59.000Z

264

Grid Simulator for Testing a Wind Turbine on Offshore Floating Platform  

SciTech Connect (OSTI)

An important aspect of such offshore testing of a wind turbine floating platform is electrical loading of the wind turbine generator. An option of interconnecting the floating wind turbine with the onshore grid via submarine power cable is limited by many factors such as costs and associated environmental aspects (i.e., an expensive and lengthy sea floor study is needed for cable routing, burial, etc). It appears to be a more cost effective solution to implement a standalone grid simulator on a floating platform itself for electrical loading of the test wind turbine. Such a grid simulator must create a stable fault-resilient voltage and frequency bus (a micro grid) for continuous operation of the test wind turbine. In this report, several electrical topologies for an offshore grid simulator were analyzed and modeled.

Gevorgian, V.

2012-02-01T23:59:59.000Z

265

Power Performance Test Report for the Viryd CS8 Wind Turbine  

SciTech Connect (OSTI)

This report contains the results of the power performance test that was performed on a Viryd CS8 wind turbine as part of the DOE Independent Testing project. The test is an accredited test to the IEC 61400-12-1 power performance standard.

Roadman, J.; Murphy, M.; van Dam, J.

2012-12-01T23:59:59.000Z

266

Design and Test of a Vertical-Axis Wind Turbine with Pitch Control J. J. Miau1,a  

E-Print Network [OSTI]

Design and Test of a Vertical-Axis Wind Turbine with Pitch Control J. J. Miau1,a , S. Y. Liang2 , R, USA a jjmiau@mail.ncku.edu.tw Keywords: vertical-axis wind turbine, pitch control, wind of a small vertical-axis wind turbine. Benefits gained can be shown by the experimental and numerical results

Leu, Tzong-Shyng "Jeremy"

267

A comparison of predicted wind turbine blade loads to test measurements  

SciTech Connect (OSTI)

The accurate prediction of wind turbine blade loads and response is important in predicting the fatigue life of wind machines. At the SERI Wind Energy Research Center, a rotor code called FLAP (Force and Loads Analysis Program) is currently being validated by comparing predicted results to machine measurements. The FLAP code has been modified to allow the teetering degrees of freedom. This paper describes these modifications and comparisons of predicted blade bending moments to test measurements. Wind tunnel data for a 1/20th scale model will be used to compare FLAP predictions for the cyclic flap-bending moments at the 33% spanwise station for three different wind speeds. The comparisons will be made for both rigid and teetering hubs. Currently, the FLAP code accounts for deterministic excitations such as wind shear, tower shadow, gravity, and prescribed yawing motions. Conclusions will be made regarding the code's accuracy in predicting the cyclic bending moments.

Wright, A.D.; Thresher, R.W.

1987-01-01T23:59:59.000Z

268

Solar cycle variations of large scale flows in the Sun  

E-Print Network [OSTI]

Using data from the Michelson Doppler Imager (MDI) instrument on board the Solar and Heliospheric Observatory (SOHO), we study the large-scale velocity fields in the outer part of the solar convection zone using the ring diagram technique. We use observations from four different times to study possible temporal variations in flow velocity. We find definite changes in both the zonal and meridional components of the flows. The amplitude of the zonal flow appears to increase with solar activity and the flow pattern also shifts towards lower latitude with time.

Sarbani Basu; H. M. Antia

2000-01-17T23:59:59.000Z

269

Large scale EPR correlations and cosmic gravitational waves  

E-Print Network [OSTI]

We study how quantum correlations survive at large scales in spite of their exposition to stochastic backgrounds of gravitational waves. We consider Einstein-Podolski-Rosen (EPR) correlations built up on the polarizations of photon pairs and evaluate how they are affected by the cosmic gravitational wave background (CGWB). We evaluate the quantum decoherence of the EPR correlations in terms of a reduction of the violation of the Bell inequality as written by Clauser, Horne, Shimony and Holt (CHSH). We show that this decoherence remains small and that EPR correlations can in principle survive up to the largest cosmic scales.

B. Lamine; R. Hervé; M. -T. Jaekel; A. Lambrecht; S. Reynaud

2011-05-10T23:59:59.000Z

270

Large-Scale Anisotropy of EGRET Gamma Ray Sources  

E-Print Network [OSTI]

In the course of its operation, the EGRET experiment detected high-energy gamma ray sources at energies above 100 MeV over the whole sky. In this communication, we search for large-scale anisotropy patterns among the catalogued EGRET sources using an expansion in spherical harmonics, accounting for EGRET's highly non-uniform exposure. We find significant excess in the quadrupole and octopole moments. This is consistent with the hypothesis that, in addition to the galactic plane, a second mid-latitude (5^{\\circ} < |b| < 30^{\\circ}) population, perhaps associated with the Gould belt, contributes to the gamma ray flux above 100 MeV.

Luis Anchordoqui; Thomas McCauley; Thomas Paul; Olaf Reimer; Diego F. Torres

2005-06-24T23:59:59.000Z

271

Statistical analysis of large-scale structure in the Universe  

E-Print Network [OSTI]

Methods for the statistical characterization of the large-scale structure in the Universe will be the main topic of the present text. The focus is on geometrical methods, mainly Minkowski functionals and the J-function. Their relations to standard methods used in cosmology and spatial statistics and their application to cosmological datasets will be discussed. This work is not only meant as a short review for comologist, but also attempts to illustrate these morphological methods and to make them accessible to scientists from other fields. Consequently, a short introduction to the standard picture of cosmology is given.

Martin Kerscher

1999-12-15T23:59:59.000Z

272

Large-Scale Manufacturing of Nanoparticle-Based Lubrication Additives  

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 on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOEWashington,LM-04-XXXX OfficeLandLarge-Scale Manufacturing

273

Large-Scale Renewable Energy Guide | 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 on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOEWashington,LM-04-XXXX OfficeLandLarge-Scale

274

225-kW Dynamometer for Testing Small Wind Turbine Components: Preprint  

SciTech Connect (OSTI)

This paper describes NREL's new 225-kW dynamometer facility that is suitable for testing a variety of components and subsystems for small wind turbines and discusses opportunities for industry partnerships with NREL for use of the facility.

Green, J.

2006-06-01T23:59:59.000Z

275

High-R Walls for New Construction Structural Performance: Wind Pressure Testing  

SciTech Connect (OSTI)

This technical report is focused primarily on laboratory testing that evaluates wind pressure performance characteristics for wall systems constructed with exterior insulating sheathing. This research and test activity will help to facilitate the ongoing use of non-structural sheathing options and provide a more in-depth understanding of how wall system layers perform in response to high wind perturbations normal to the surface.

DeRenzis, A.; Kochkin, V.

2013-01-01T23:59:59.000Z

276

Acoustic Noise Test Report for the Viryd CS8 Wind Turbine  

SciTech Connect (OSTI)

This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the Viryd CS8 is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and binning by wind speed instead of regression analysis.

Roadman, J.; Huskey, A.

2013-07-01T23:59:59.000Z

277

Acoustic Noise Test Report for the SWIFT Wind Turbine in Boulder, CO  

SciTech Connect (OSTI)

This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the SWIFT is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and utilized binning by wind speed instead of regression analysis.

Roadman, J.; Huskey, A.

2013-04-01T23:59:59.000Z

278

Large Scale Structure in the Sloan Digital Sky Survey  

E-Print Network [OSTI]

The primary observational goals of the Sloan Digital Sky Survey are to obtain CCD imaging of 10,000 deg^2 of the north Galactic cap in five passbands, with a limiting magnitude in the r-band of 22.5, to obtain spectroscopic redshifts of 10^6 galaxies and 10^5 quasars, and to obtain similar data for three ~ 200 deg^2 stripes in the south Galactic cap, with repeated imaging to allow co-addition and variability studies in at least one of these stripes. The resulting photometric and spectroscopic galaxy datasets allow one to map the large scale structure traced by optical galaxies over a wide range of scales to unprecedented precision. Results relevant to the large scale structure of our Universe include: a flat model with a cosmological constant Omega_Lambda=0.7 provides a good description of the data; the galaxy-galaxy correlation function shows departures from a power law which are statistically significant; and galaxy clustering is a strong function of galaxy type.

M. Bernardi

2003-03-07T23:59:59.000Z

279

Transition from Large-Scale to Small-Scale Dynamo  

SciTech Connect (OSTI)

The dynamo equations are solved numerically with a helical forcing corresponding to the Roberts flow. In the fully turbulent regime the flow behaves as a Roberts flow on long time scales, plus turbulent fluctuations at short time scales. The dynamo onset is controlled by the long time scales of the flow, in agreement with the former Karlsruhe experimental results. The is governed by a generalized {alpha} effect, which includes both the usual {alpha} effect and turbulent diffusion, plus all higher order effects. Beyond the onset we find that this generalized {alpha} effect scales as O(Rm{sup -1}), suggesting the takeover of small-scale dynamo action. This is confirmed by simulations in which dynamo occurs even if the large-scale field is artificially suppressed.

Ponty, Y. [Universite de Nice Sophia-Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, Nice cedex 04 (France); Plunian, F. [Institut des Sciences de la Terre, CNRS, Universite Joseph Fourier, B.P. 53, 38041 Grenoble cedex 09 (France)

2011-04-15T23:59:59.000Z

280

Large scale anisotropic bias from primordial non-Gaussianity  

SciTech Connect (OSTI)

In this work we study the large scale structure bias in models of anisotropic inflation. We use the Peak Background Splitting method in Excursion Set Theory to find the scale-dependent bias. We show that the amplitude of the bias is modified by a direction-dependent factor. In the specific anisotropic inflation model which we study, the scale-dependent bias vanishes at leading order when the long wavelength mode in squeezed limit is aligned with the anisotropic direction in the sky. We also extend the scale-dependent bias formulation to the general situations with primordial anisotropy. We find some selection rules indicating that some specific parts of a generic anisotropic bispectrum is picked up by the bias parameter. We argue that the anisotropic bias is mainly sourced by the angle between the anisotropic direction and the long wavelength mode in the squeezed limit.

Baghram, Shant; Firouzjahi, Hassan [School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Namjoo, Mohammad Hossein, E-mail: baghram@ipm.ir, E-mail: mh.namjoo@ipm.ir, E-mail: firouz@ipm.ir [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

2013-08-01T23:59:59.000Z

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


281

Atypical Behavior Identification in Large Scale Network Traffic  

SciTech Connect (OSTI)

Cyber analysts are faced with the daunting challenge of identifying exploits and threats within potentially billions of daily records of network traffic. Enterprise-wide cyber traffic involves hundreds of millions of distinct IP addresses and results in data sets ranging from terabytes to petabytes of raw data. Creating behavioral models and identifying trends based on those models requires data intensive architectures and techniques that can scale as data volume increases. Analysts need scalable visualization methods that foster interactive exploration of data and enable identification of behavioral anomalies. Developers must carefully consider application design, storage, processing, and display to provide usability and interactivity with large-scale data. We present an application that highlights atypical behavior in enterprise network flow records. This is accomplished by utilizing data intensive architectures to store the data, aggregation techniques to optimize data access, statistical techniques to characterize behavior, and a visual analytic environment to render the behavioral trends, highlight atypical activity, and allow for exploration.

Best, Daniel M.; Hafen, Ryan P.; Olsen, Bryan K.; Pike, William A.

2011-10-23T23:59:59.000Z

282

The XMM/Megacam-VST/VIRMOS Large Scale Structure Survey  

E-Print Network [OSTI]

The objective of the XMM-LSS Survey is to map the large scale structure of the universe, as highlighted by clusters and groups of galaxies, out to a redshift of about 1, over a single 8x8 sq.deg. area. For the first time, this will reveal the topology of the distribution of the deep potential wells and provide statistical measurements at truly cosmological distances. In addition, clusters identified via their X-ray properties will form the basis for the first uniformly-selected, multi-wavelength survey of the evolution of clusters and individual cluster galaxies as a function of redshift. The survey will also address the very important question of the QSO distribution within the cosmic web.

M. Pierre

2000-11-08T23:59:59.000Z

283

High Metallicity, Photoionised Gas in Intergalactic Large-Scale Filaments  

E-Print Network [OSTI]

We present high-resolution UV spectra of absorption-line systems toward the low-z QSO HS0624+6907 (z=0.3700). Coupled with spectroscopic galaxy redshifts, we find that many of these absorbers are integalactic gas clouds distributed within large-scale structures. The gas is cool (T0.9). STIS data reveal a cluster of 13 HI Lyman alpha lines within a 1000 km/s interval at z=0.0635. We find 10 galaxies at this redshift with impact parameters ranging from 135 h^-1 kpc to 1.37 h^-1 Mpc. We attribute the HI Lya absorptions to intragroup medium gas, possibly from a large-scale filament viewed along its long axis. Remarkably, the metallicity is near-solar, [M/H] = -0.05 +/- 0.4 (2 sigma uncertainty), yet the nearest galaxy which might pollute the IGM is at least 135 h_70^-1 kpc away. Tidal stripping from nearby galaxies appears to be the most likely origin of this highly enriched, cool gas. More than six Abell galaxy clusters are found within 4 degree of the sight line suggesting that the QSO line of sight passes near a node in the cosmic web. At z~0.077, we find absorption systems as well as galaxies at the redshift of the nearby clusters Abell 564 and Abell 559. We conclude that the sight line pierces a filament of gas and galaxies feeding into these clusters. The absorber at z_abs = 0.07573 associated with Abell 564/559 also has a high metallicity with [C/H] > -0.6, but again the closest galaxy is relatively far from the sight line (293 h^-1 kpc).

Bastien Aracil; Todd M. Tripp; David V. Bowen; Jason X. Proschaska; Hsiao-Wen Chen; Brenda L. Frye

2006-08-21T23:59:59.000Z

284

Training a Large Scale Classifier with the Quantum Adiabatic Algorithm  

E-Print Network [OSTI]

In a previous publication we proposed discrete global optimization as a method to train a strong binary classifier constructed as a thresholded sum over weak classifiers. Our motivation was to cast the training of a classifier into a format amenable to solution by the quantum adiabatic algorithm. Applying adiabatic quantum computing (AQC) promises to yield solutions that are superior to those which can be achieved with classical heuristic solvers. Interestingly we found that by using heuristic solvers to obtain approximate solutions we could already gain an advantage over the standard method AdaBoost. In this communication we generalize the baseline method to large scale classifier training. By large scale we mean that either the cardinality of the dictionary of candidate weak classifiers or the number of weak learners used in the strong classifier exceed the number of variables that can be handled effectively in a single global optimization. For such situations we propose an iterative and piecewise approach in which a subset of weak classifiers is selected in each iteration via global optimization. The strong classifier is then constructed by concatenating the subsets of weak classifiers. We show in numerical studies that the generalized method again successfully competes with AdaBoost. We also provide theoretical arguments as to why the proposed optimization method, which does not only minimize the empirical loss but also adds L0-norm regularization, is superior to versions of boosting that only minimize the empirical loss. By conducting a Quantum Monte Carlo simulation we gather evidence that the quantum adiabatic algorithm is able to handle a generic training problem efficiently.

Hartmut Neven; Vasil S. Denchev; Geordie Rose; William G. Macready

2009-12-04T23:59:59.000Z

285

A subspace, interior, and conjugate gradient method for large-scale bound-constrained minimization problems  

SciTech Connect (OSTI)

A subspace adaptation of the Coleman-Li trust region and interior method is proposed for solving large-scale bound-constrained minimization problems. This method can be implemented with either sparse Cholesky factorization or conjugate gradient computation. Under reasonable conditions the convergence properties of this subspace trust region method are as strong as those of its full-space version. Computational performance on various large test problems is reported; advantages of the approach are demonstrated. The experience indicates that the proposed method represents an efficient way to solve large bound-constrained minimization problems.

Branch, M.A.; Coleman, T.F.; Li, Y.

1999-09-01T23:59:59.000Z

286

Large-Scale Field Study of Landfill Covers at Sandia National Laboratories  

SciTech Connect (OSTI)

A large-scale field demonstration comparing final landfill cover designs has been constructed and is currently being monitored at Sandia National Laboratories in Albuquerque, New Mexico. Two conventional designs (a RCRA Subtitle `D' Soil Cover and a RCRA Subtitle `C' Compacted Clay Cover) were constructed side-by-side with four alternative cover test plots designed for dry environments. The demonstration is intended to evaluate the various cover designs based on their respective water balance performance, ease and reliability of construction, and cost. This paper presents an overview of the ongoing demonstration.

Dwyer, S.F.

1998-09-01T23:59:59.000Z

287

Wind Program Announces $2 Million to Develop and Field Test Wind Energy Bat  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf TheViolations | Department ofEnergy Wind Power Today,

288

Wind Power: How Much, How Soon, and At What Cost?  

E-Print Network [OSTI]

Evaluation of Global Wind Power." Journal of Geophysical2008. "The Economics of Wind Power with Energy Storage."Economics of Large-Scale Wind Power in a Carbon Constrained

Wiser, Ryan H

2010-01-01T23:59:59.000Z

289

Fully coupled dynamic analysis of a floating wind turbine system  

E-Print Network [OSTI]

The use of wind power is in a period of rapid growth worldwide and wind energy systems have emerged as a promising technology for utilizing offshore wind resources for the large scale generation of electricity. Drawing ...

Withee, Jon E

2004-01-01T23:59:59.000Z

290

Value Capture in the Global Wind Energy Industry  

E-Print Network [OSTI]

a large scale wind turbine are the tower, blades, and gearcost of large wind turbine (REpower MM92) Tower Rotor bladesa utility-scale wind turbine. Towers run from 40-100 meters,

Dedrick, Jason; Kraemer, Kenneth L.

2011-01-01T23:59:59.000Z

291

Large-scale fabrication and assembly of carbon nanotubes via nanopelleting  

E-Print Network [OSTI]

Widespread use of carbon nanotubes is predicated on the development of robust large-scale manufacturing techniques. There remain, however, few feasible methods for the large-scale handling of aligned and geometrically ...

El Aguizy, Tarek A., 1977-

2004-01-01T23:59:59.000Z

292

Architectural Design and Complexity Analysis of Large-Scale Cortical Simulation on a Hybrid Computing Platform  

E-Print Network [OSTI]

- performance computing platform for large-scale mathematical models. Traditional computing architecture cannot hybrid computing architecture for the simulation and evaluation of large-scale associative neural memory models. The proposed architecture achieves very high computing and communication performances

Qiu, Qinru

293

Workshop on Scalable Cyber-Security Challenges in Large-Scale Networks: Deployment Obstacles  

E-Print Network [OSTI]

Workshop on Scalable Cyber-Security Challenges in Large-Scale Networks: Deployment Obstacles Large, and Definitions of Cybersecurity.... 8 Conventional Wisdom is Inadequate....................................... 9 Directions in Scalable Cyber-Security in Large-Scale Networks: Deployment Obstacles." The workshop

Feigenbaum, Joan

294

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

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

66.7 Million for Large-Scale Carbon Sequestration Project Energy Department Awards 66.7 Million for Large-Scale Carbon Sequestration Project December 18, 2007 - 4:58pm Addthis...

295

DOE Awards $126.6 Million for Two More Large-Scale Carbon Sequestratio...  

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

126.6 Million for Two More Large-Scale Carbon Sequestration Projects DOE Awards 126.6 Million for Two More Large-Scale Carbon Sequestration Projects May 6, 2008 - 11:30am Addthis...

296

Test Results of a Nb3Sn Wind/React 'Stress-Managed' BlockDipole  

SciTech Connect (OSTI)

A second phase of a highfield dipole technology developmenthas been tested. A Nb3Sn block-coil model dipole was fabricated, usingmagnetic mirror geometry and wind/react coil technology. The primaryobjective of this phase was to make a first experimental test of thestress-management strategy pioneered at Texas A&M. In this strategy ahigh-strength support matrix is integrated with the windings to interceptLorentz stress from the inner winding so that it does not accumulate inthe outer winding. The magnet attained a field that was consistent withshort sample limit on the first quench; there was no training. Thedecoupling of Lorentz stress between inner and outer windings wasvalidated. In ramp rate studies the magnet exhibited a remarkablerobustness in rapid ramping operation. It reached 85 percent of shortsample(ss) current even while ramping 2-3 T/s. This robustness isattributed to the orientation of the Rutherford cables parallel to thefield in the windings, instead of the transverse orientation thatcharacterizes common dipole designs. Test results are presented and thenext development phase plans are discussed.

McInturff, A.; Bish, P.; Blackburn, R.; Diaczenko, N.; Elliott,T.; Hafalia Jr., R.; Henchel, W.; Jaisle, A.; Lau, W.; Lietzke, A.; McIntyre, P.; Noyes, P.; Nyman, M.; Sattarov, A.; Sattarov, A.

2006-08-25T23:59:59.000Z

297

Test Results of a Nb3Sn Wind/React"Stress-Managed" Block Dipole  

SciTech Connect (OSTI)

A second phase of a high field dipole technology development has been tested. A Nb{sub 3}Sn block-coil model dipole was fabricated, using magnetic mirror geometry and wind/react coil technology. The primary objective of this phase was to make a first experimental test of the stress-management strategy pioneered at Texas A&M. In this strategy a high-strength support matrix is integrated with the windings to intercept Lorentz stress from the inner winding so that it does not accumulate in the outer winding. The magnet attained a field that was consistent with short sample limit on the first quench; there was no training. The decoupling of Lorentz stress between inner and outer windings was validated. In ramp rate studies the magnet exhibited a remarkable robustness in rapid ramping operation. It reached 85% of short sample(ss) current even while ramping 2-3 T/s. This robustness is attributed to the orientation of the Rutherford cables parallel to the field in the windings, instead of the transverse orientation that characterizes common dipole designs. Test results are presented and the next development phase plans are discussed.

McInturff, A.; Blackburn, R.; Diaczenko, N.; Elliott, T.; Henchel, W.; Jaisle, A.; McIntyre, P.; Noyes, P.; Sattarov, A.; Lietzke, A.; Hafalia Jr., R.; Lau, W.; Nyman, M.; Bish, P.

2007-06-01T23:59:59.000Z

298

EA-1792-S1: University of Maine's Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project – Castine Harbor Test Site  

Broader source: Energy.gov [DOE]

This Supplemental EA evaluates the environmental impacts of the University of Maine proposal to use Congressionally directed federal funding, from DOE, to deploy, test and retrieve one 1/8-scale floating wind turbine (20kw) prototype in Castine Harbor, offshore of Castine Maine. This test would be conducted prior to testing at the site 2 miles from Monhegan Island (evaluated under DOE EA-1792).

299

Supporting Large-scale Continuous Stream Datacenters via Pub/Sub Middleware and Adaptive Transport Protocols  

E-Print Network [OSTI]

Supporting Large-scale Continuous Stream Datacenters via Pub/Sub Middleware and Adaptive Transport {mahesh, ken}@cs.cornell.edu Abstract Large-scale datacenters that handle continuous data streams require constitutes a promising area of research to address the challenges of these types of large-scale datacenters

Schmidt, Douglas C.

300

Influence of Western North Pacific Tropical Cyclones on Their Large-Scale Environment  

E-Print Network [OSTI]

water vapor, and sea surface tem- perature (SST)] on an index of TC activity [accumulated cyclone energyInfluence of Western North Pacific Tropical Cyclones on Their Large-Scale Environment ADAM H. SOBEL) tropical cyclones (TCs) on their large-scale environment by lag regressing various large-scale climate

Sobel, Adam

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


301

Ferroelectric opening switches for large-scale pulsed power drivers.  

SciTech Connect (OSTI)

Fast electrical energy storage or Voltage-Driven Technology (VDT) has dominated fast, high-voltage pulsed power systems for the past six decades. Fast magnetic energy storage or Current-Driven Technology (CDT) is characterized by 10,000 X higher energy density than VDT and has a great number of other substantial advantages, but it has all but been neglected for all of these decades. The uniform explanation for neglect of CDT technology is invariably that the industry has never been able to make an effective opening switch, which is essential for the use of CDT. Most approaches to opening switches have involved plasma of one sort or another. On a large scale, gaseous plasmas have been used as a conductor to bridge the switch electrodes that provides an opening function when the current wave front propagates through to the output end of the plasma and fully magnetizes the plasma - this is called a Plasma Opening Switch (POS). Opening can be triggered in a POS using a magnetic field to push the plasma out of the A-K gap - this is called a Magnetically Controlled Plasma Opening Switch (MCPOS). On a small scale, depletion of electron plasmas in semiconductor devices is used to affect opening switch behavior, but these devices are relatively low voltage and low current compared to the hundreds of kilo-volts and tens of kilo-amperes of interest to pulsed power. This work is an investigation into an entirely new approach to opening switch technology that utilizes new materials in new ways. The new materials are Ferroelectrics and using them as an opening switch is a stark contrast to their traditional applications in optics and transducer applications. Emphasis is on use of high performance ferroelectrics with the objective of developing an opening switch that would be suitable for large scale pulsed power applications. Over the course of exploring this new ground, we have discovered new behaviors and properties of these materials that were here to fore unknown. Some of these unexpected discoveries have lead to new research directions to address challenges.

Brennecka, Geoffrey L.; Rudys, Joseph Matthew; Reed, Kim Warren; Pena, Gary Edward; Tuttle, Bruce Andrew; Glover, Steven Frank

2009-11-01T23:59:59.000Z

302

Giant radio galaxies - II. Tracers of large-scale structure  

E-Print Network [OSTI]

We have carried out optical spectroscopy with the Anglo-Australian Telescope for 24,726 objects surrounding a sample of 19 Giant Radio Galaxies (GRGs) selected to have redshifts in the range 0.05 to 0.15 and projected linear sizes from 0.8 to 3.2 Mpc. Such radio galaxies are ideal candidates to study the Warm-Hot Intergalactic Medium (WHIM) because their radio lobes extend beyond the ISM and halos of their host galaxies, and into the tenuous IGM. We were able to measure redshifts for 9,076 galaxies. Radio imaging of each GRG, including high-sensitivity, wideband radio observations from the Australia Telescope Compact Array for 12 GRGs and host optical spectra (presented in a previous paper, Malarecki et al. 2013), is used in conjunction with the surrounding galaxy redshifts to trace large-scale structure. We find that the mean galaxy number overdensity in volumes of ~700 Mpc$^3$ near the GRG host galaxies is ~70 indicating an overdense but non-virialized environment. A Fourier component analysis is used to qu...

Malarecki, J M; Saripalli, L; Staveley-Smith, L; Subrahmanyan, R

2015-01-01T23:59:59.000Z

303

Parallel Index and Query for Large Scale Data Analysis  

SciTech Connect (OSTI)

Modern scientific datasets present numerous data management and analysis challenges. State-of-the-art index and query technologies are critical for facilitating interactive exploration of large datasets, but numerous challenges remain in terms of designing a system for process- ing general scientific datasets. The system needs to be able to run on distributed multi-core platforms, efficiently utilize underlying I/O infrastructure, and scale to massive datasets. We present FastQuery, a novel software framework that address these challenges. FastQuery utilizes a state-of-the-art index and query technology (FastBit) and is designed to process mas- sive datasets on modern supercomputing platforms. We apply FastQuery to processing of a massive 50TB dataset generated by a large scale accelerator modeling code. We demonstrate the scalability of the tool to 11,520 cores. Motivated by the scientific need to search for inter- esting particles in this dataset, we use our framework to reduce search time from hours to tens of seconds.

Chou, Jerry; Wu, Kesheng; Ruebel, Oliver; Howison, Mark; Qiang, Ji; Prabhat,; Austin, Brian; Bethel, E. Wes; Ryne, Rob D.; Shoshani, Arie

2011-07-18T23:59:59.000Z

304

Classical Control of Large-Scale Quantum Computers  

E-Print Network [OSTI]

The accelerated development of quantum technology has reached a pivotal point. Early in 2014, several results were published demonstrating that several experimental technologies are now accurate enough to satisfy the requirements of fault-tolerant, error corrected quantum computation. While there are many technological and experimental issues that still need to be solved, the ability of experimental systems to now have error rates low enough to satisfy the fault-tolerant threshold for several error correction models is a tremendous milestone. Consequently, it is now a good time for the computer science and classical engineering community to examine the {\\em classical} problems associated with compiling quantum algorithms and implementing them on future quantum hardware. In this paper, we will review the basic operational rules of a topological quantum computing architecture and outline one of the most important classical problems that need to be solved; the decoding of error correction data for a large-scale quantum computer. We will endeavour to present these problems independently from the underlying physics as much of this work can be effectively solved by non-experts in quantum information or quantum mechanics.

Simon J. Devitt

2014-05-20T23:59:59.000Z

305

Fractal Approach to Large-Scale Galaxy Distribution  

E-Print Network [OSTI]

We present a review of the history and the present state of the fractal approach to the large-scale distribution of galaxies. Angular correlation function was used as a general instrument for the structure analysis. It was realized later that a normalization condition for the reduced correlation function estimator results in distorted values for both R_{hom} and fractal dimension D. Moreover, according to a theorem on projections of fractals, galaxy angular catalogues can not be used for detecting a structure with the fractal dimension D>2. For this 3-d maps are required, and indeed modern extensive redshift-based 3-d maps have revealed the ``hidden'' fractal dimension of about 2, and have confirmed superclustering at scales even up to 500 Mpc (e.g. the Sloan Great Wall). On scales, where the fractal analysis is possible in completely embedded spheres, a power--law density field has been found. The fractal dimension D =2.2 +- 0.2 was directly obtained from 3-d maps and R_{hom} has expanded from 10 Mpc to scales approaching 100 Mpc. In concordance with the 3-d map results, modern all sky galaxy counts in the interval 10^m - 15^m give a 0.44m-law which corresponds to D=2.2 within a radius of 100h^{-1}_{100} Mpc. We emphasize that the fractal mass--radius law of galaxy clustering has become a key phenomenon in observational cosmology.

Yurij Baryshev; Pekka Teerikorpi

2005-05-10T23:59:59.000Z

306

Investigation of Data Quality for Wind Tunnel Internal Balance Testing  

E-Print Network [OSTI]

Analysis Techniques . . . . . . . . 35 B. Examination of the Uncertainty in Measurements . . . . . 37 C. Data Acquisition and Reference Frames . . . . . . . . . . . 40 D. Sting De ections . . . . . . . . . . . . . . . . . . . . . . . 42 E. Static Tare... Balance Gages : : : : : : : : : : : : : : : 38 7 Uncertainty of Measured Testing Parameters : : : : : : : : : : : : : : 40 8 Uncertainty of the Reported Test Section and Model Parameters : : 55 9 Uncertainty of the Reported Force and Moment Coe cients...

Hidore, John Preston

2013-04-04T23:59:59.000Z

307

PATHWAYS OF LARGE-SCALE MAGNETIC COUPLINGS BETWEEN SOLAR CORONAL EVENTS  

SciTech Connect (OSTI)

The high-cadence, comprehensive view of the solar corona by SDO/AIA shows many events that are widely separated in space while occurring close together in time. In some cases, sets of coronal events are evidently causally related, while in many other instances indirect evidence can be found. We present case studies to highlight a variety of coupling processes involved in coronal events. We find that physical linkages between events do occur, but concur with earlier studies that these couplings appear to be crucial to understanding the initiation of major eruptive or explosive phenomena relatively infrequently. We note that the post-eruption reconfiguration timescale of the large-scale corona, estimated from the extreme-ultraviolet afterglow, is on average longer than the mean time between coronal mass ejections (CMEs), so that many CMEs originate from a corona that is still adjusting from a previous event. We argue that the coronal field is intrinsically global: current systems build up over days to months, the relaxation after eruptions continues over many hours, and evolving connections easily span much of a hemisphere. This needs to be reflected in our modeling of the connections from the solar surface into the heliosphere to properly model the solar wind, its perturbations, and the generation and propagation of solar energetic particles. However, the large-scale field cannot be constructed reliably by currently available observational resources. We assess the potential of high-quality observations from beyond Earth's perspective and advanced global modeling to understand the couplings between coronal events in the context of CMEs and solar energetic particle events.

Schrijver, Carolus J.; Title, Alan M.; DeRosa, Marc L. [Lockheed Martin Advanced Technology Center, 3251 Hanover Street, Palo Alto, CA 94304 (United States); Yeates, Anthony R. [Department of Mathematical Sciences, Durham University, Science Laboratories, South Road, Durham DH1 3LE (United Kingdom)

2013-08-20T23:59:59.000Z

308

Implementation of a Biaxial Resonant Fatigue Test Method on a Large Wind Turbine Blade  

SciTech Connect (OSTI)

A biaxial resonant test method was utilized to simultaneously fatigue test a wind turbine blade in the flap and edge (lead-lag) direction. Biaxial resonant blade fatigue testing is an accelerated life test method utilizing oscillating masses on the blade; each mass is independently oscillated at the respective flap and edge blade resonant frequency. The flap and edge resonant frequency were not controlled, nor were they constant for this demonstrated test method. This biaxial resonant test method presented surmountable challenges in test setup simulation, control and data processing. Biaxial resonant testing has the potential to complete test projects faster than single-axis testing. The load modulation during a biaxial resonant test may necessitate periodic load application above targets or higher applied test cycles.

Snowberg, D.; Dana, S.; Hughes, S.; Berling, P.

2014-09-01T23:59:59.000Z

309

Cosmological Implications of the CMB Large-scale Structure  

E-Print Network [OSTI]

WMAP and Planck may have uncovered several anomalies in the full CMB sky that could indicate possible new physics driving the growth of density fluctuations in the early Universe. These include an unusually low power at the largest scales and an apparent alignment of the quadrupole and octopole moments. In LCDM, the quadrupole and octopole moments should be statistically independent. These low probability features may simply be due to posterior selections from many such possible effects. If this is not the case, however, their combined statistical significance would be equal to the product of their individual significances. Ignoring the biasing due to posterior selection, the missing large-angle correlations would have a probability as low as ~0.1% and the low-l multipole alignment would be unlikely at the ~4.9% level; under the least favourable conditions, their simultaneous observation in the context of the standard model could then be likely at only the ~0.005% level. In this paper, we explore the possibility that these features are indeed anomalous, and show that the corresponding probability of CMB multipole alignment in the R_h=ct Universe would then be ~7-10%, depending on the number of large-scale Sachs-Wolfe induced fluctuations. Since the low power at the largest spatial scales is reproduced in this cosmology without the need to invoke cosmic variance, the overall likelihood of observing both of these features in the CMB is > 7%, much more likely than in LCDM. The key physical ingredient responsible for this difference is the existence in the former of a maximum fluctuation size at the time of recombination, which is absent in the latter because of inflation.

Fulvio Melia

2014-09-27T23:59:59.000Z

310

Lateral solids dispersion coefficient in large-scale fluidized beds  

SciTech Connect (OSTI)

The design of fuel feed ports in a large-scale fluidized bed combustor depends on the fuel characteristics and lateral solids mixing. However, the reported values of the effective lateral solids dispersion coefficient (D{sub sr}) are scattered in the broad range of 0.0001-0.1 m{sup 2}/s. With the aim of predicting D{sub sr} in wider fluidized beds which is difficult to measure directly or deduce from experimental results in lab-scale facilities, a computational method is proposed. It combines the Eulerian-Granular simulation and fictitious particle tracing technique. The value of D{sub sr} is calculated based on the movement of the tracers. The effect on D{sub sr} of bed width (W) ranging from 0.4 m up to 12.8 m at different levels of superficial gas velocity (U{sub 0}) is investigated. It is found that increasing W whilst maintaining U{sub 0}, D{sub sr} initially increases markedly, then its increase rate declines, and finally it stays around a constant value. The computed values of D{sub sr} are examined quantitatively and compared with a thorough list of the measured D{sub sr} in the literature since 1980s. Agreed with the measurements performed in the pilot-scale fluidized beds, the value of D{sub sr} in wider facilities at higher fluidizing velocities is predicted to be around the order of magnitude of 0.1 m{sup 2}/s, much higher than that in lab-scale beds. Finally, the effect of D{sub sr} on the distribution of fuel particles over the cross section in fluidized beds with the specified layout of feed ports is discussed. (author)

Liu, Daoyin; Chen, Xiaoping [School of Energy and Environment, Southeast University, Nanjing 210096 (China)

2010-11-15T23:59:59.000Z

311

Large Scale Computing and Storage Requirements for Nuclear Physics Research  

SciTech Connect (OSTI)

IThe National Energy Research Scientific Computing Center (NERSC) is the primary computing center for the DOE Office of Science, serving approximately 4,000 users and hosting some 550 projects that involve nearly 700 codes for a wide variety of scientific disciplines. In addition to large-scale computing resources NERSC provides critical staff support and expertise to help scientists make the most efficient use of these resources to advance the scientific mission of the Office of Science. In May 2011, NERSC, DOE’s Office of Advanced Scientific Computing Research (ASCR) and DOE’s Office of Nuclear Physics (NP) held a workshop to characterize HPC requirements for NP research over the next three to five years. The effort is part of NERSC’s continuing involvement in anticipating future user needs and deploying necessary resources to meet these demands. The workshop revealed several key requirements, in addition to achieving its goal of characterizing NP computing. The key requirements include: 1. Larger allocations of computational resources at NERSC; 2. Visualization and analytics support; and 3. Support at NERSC for the unique needs of experimental nuclear physicists. This report expands upon these key points and adds others. The results are based upon representative samples, called “case studies,” of the needs of science teams within NP. The case studies were prepared by NP workshop participants and contain a summary of science goals, methods of solution, current and future computing requirements, and special software and support needs. Participants were also asked to describe their strategy for computing in the highly parallel, “multi-core” environment that is expected to dominate HPC architectures over the next few years. The report also includes a section with NERSC responses to the workshop findings. NERSC has many initiatives already underway that address key workshop findings and all of the action items are aligned with NERSC strategic plans.

Gerber, Richard A.; Wasserman, Harvey J.

2012-03-02T23:59:59.000Z

312

Large-Scale Data Challenges in Future Power Grids  

SciTech Connect (OSTI)

This paper describes technical challenges in supporting large-scale real-time data analysis for future power grid systems and discusses various design options to address these challenges. Even though the existing U.S. power grid has served the nation remarkably well over the last 120 years, big changes are in the horizon. The widespread deployment of renewable generation, smart grid controls, energy storage, plug-in hybrids, and new conducting materials will require fundamental changes in the operational concepts and principal components. The whole system becomes highly dynamic and needs constant adjustments based on real time data. Even though millions of sensors such as phase measurement units (PMUs) and smart meters are being widely deployed, a data layer that can support this amount of data in real time is needed. Unlike the data fabric in cloud services, the data layer for smart grids must address some unique challenges. This layer must be scalable to support millions of sensors and a large number of diverse applications and still provide real time guarantees. Moreover, the system needs to be highly reliable and highly secure because the power grid is a critical piece of infrastructure. No existing systems can satisfy all the requirements at the same time. We examine various design options. In particular, we explore the special characteristics of power grid data to meet both scalability and quality of service requirements. Our initial prototype can improve performance by orders of magnitude over existing general-purpose systems. The prototype was demonstrated with several use cases from PNNL’s FPGI and was shown to be able to integrate huge amount of data from a large number of sensors and a diverse set of applications.

Yin, Jian; Sharma, Poorva; Gorton, Ian; Akyol, Bora A.

2013-03-25T23:59:59.000Z

313

Distortive Effects of Initial-Based Name Disambiguation on Measurements of Large-Scale Coauthorship Networks  

E-Print Network [OSTI]

Scholars have often relied on name initials to resolve name ambiguities in large-scale coauthorship network research. This approach bears the risk of incorrectly merging or splitting author identities. The use of initial-based disambiguation has been justified by the assumption that such errors would not affect research findings too much. This paper tests this assumption by analyzing coauthorship networks from five academic fields - biology, computer science, nanoscience, neuroscience, and physics - and an interdisciplinary journal, PNAS. Name instances in datasets of this study were disambiguated based on heuristics gained from previous algorithmic disambiguation solutions. We use disambiguated data as a proxy of ground-truth to test the performance of three types of initial-based disambiguation. Our results show that initial-based disambiguation can misrepresent statistical properties of coauthorship networks: it deflates the number of unique authors, number of component, average shortest paths, clustering ...

Kim, Jinseok

2015-01-01T23:59:59.000Z

314

New Report Evaluates Impacts of DOE's Wind Powering America Initiative...  

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

address current and emerging barriers that could affect large-scale growth in wind energy capacity. Another recommendation was to continue utilizing the initiative's ability to...

315

Large Scale Computing and Storage Requirements for High Energy Physics  

SciTech Connect (OSTI)

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

Gerber, Richard A.; Wasserman, Harvey

2010-11-24T23:59:59.000Z

316

Wind load and life-cycle testing of second generation heliostats  

SciTech Connect (OSTI)

As technical manager of the Second Generation Heliostat development contracts for the Department of Energy, Sandia National Laboratories has evaluated four heliostat designs. The evaluation of the heliostats included the life-cycling and simulated wind load testing of prototype heliostats and foundations. All of the heliostats had minor problems during this testing; as a result, specific design improvements were identified for each drive mechanism and for two of the four foundations.

Rorke, W.S. Jr.

1983-11-01T23:59:59.000Z

317

Large Scale Computing and Storage Requirements for Nuclear Physics Research  

E-Print Network [OSTI]

in the process of thermonuclear incineration of theircore-collapse and thermonuclear events to test predictionsprocesses. In contrast to thermonuclear supernova modeling,

Gerber, Richard A.

2012-01-01T23:59:59.000Z

318

Viscoplasticity and large-scale chain relaxation in glassy-polymeric strain hardening  

E-Print Network [OSTI]

A simple theory for glassy polymeric mechanical response which accounts for large scale chain relaxation is presented. It captures the crossover from perfect-plastic response to strong strain hardening as the degree of polymerization $N$ increases, without invoking entanglements. By relating hardening to interactions on the scale of monomers and chain segments, we correctly predict its magnitude. Strain activated relaxation arising from the need to maintain constant chain contour length reduces the $N$ dependence of the characteristic relaxation time by a factor $\\sim \\dot\\epsilon N$ during active deformation at strain rate $\\dot\\epsilon$. This prediction is consistent with results from recent experiments and simulations, and we suggest how it may be further tested experimentally.

Robert S. Hoy; Corey S. O'Hern

2010-08-06T23:59:59.000Z

319

Parallel I/O Software Infrastructure for Large-Scale Systems  

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

Parallel IO Software Infrastructure for Large-Scale Systems | Tags: Math & Computer Science Choudhary.png An illustration of how MPI---IO file domain alignment works to...

320

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion  

E-Print Network [OSTI]

comparison of terascale combustion simulation data. Mathe-premixed hydrogen ?ames. Combustion and Flame, [7] J. L.of Large Scale Turbulent Combustion Peer-Timo Bremer 1 ,

Bremer, Peer-Timo

2010-01-01T23:59:59.000Z

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


321

Performance Engineering: Understanding and Improving the Performance of Large-Scale Codes  

E-Print Network [OSTI]

An API for Runtime Code Patching,” Journal of Highof the Conference on Code Generation and Optimization,Performance of Large-Scale Codes David H. Bailey 1 , Robert

2008-01-01T23:59:59.000Z

322

NESC-VII: Fracture Mechanics Analyses of WPS Experiments on Large-scale Cruciform Specimen  

SciTech Connect (OSTI)

This paper describes numerical analyses performed to simulate warm pre-stress (WPS) experiments conducted with large-scale cruciform specimens within the Network for Evaluation of Structural Components (NESC-VII) project. NESC-VII is a European cooperative action in support of WPS application in reactor pressure vessel (RPV) integrity assessment. The project aims in evaluation of the influence of WPS when assessing the structural integrity of RPVs. Advanced fracture mechanics models will be developed and performed to validate experiments concerning the effect of different WPS scenarios on RPV components. The Oak Ridge National Laboratory (ORNL), USA contributes to the Work Package-2 (Analyses of WPS experiments) within the NESCVII network. A series of WPS type experiments on large-scale cruciform specimens have been conducted at CEA Saclay, France, within the framework of NESC VII project. This paper first describes NESC-VII feasibility test analyses conducted at ORNL. Very good agreement was achieved between AREVA NP SAS and ORNL. Further analyses were conducted to evaluate the NESC-VII WPS tests conducted under Load-Cool-Transient- Fracture (LCTF) and Load-Cool-Fracture (LCF) conditions. This objective of this work is to provide a definitive quantification of WPS effects when assessing the structural integrity of reactor pressure vessels. This information will be utilized to further validate, refine, and improve the WPS models that are being used in probabilistic fracture mechanics computer codes now in use by the NRC staff in their effort to develop risk-informed updates to Title 10 of the U.S. Code of Federal Regulations (CFR), Part 50, Appendix G.

Yin, Shengjun [ORNL; Williams, Paul T [ORNL; Bass, Bennett Richard [ORNL

2011-01-01T23:59:59.000Z

323

A framework for delay emulation of large-scale internetworks  

E-Print Network [OSTI]

. The framework models and dynamically adapts the test traffic according to the network delay characteristics observed on the Internet in real-time. The proposed framework consists of three main modules: Virtual Host Configuration Module, Delay Estimator...

Venkata, Shravan Rangaraju

2001-01-01T23:59:59.000Z

324

Large-scale analysis of phylogenetic search behavior  

E-Print Network [OSTI]

stopping criterion to maximize the tree search results while minimizing computational time tested on three biological datasets using the correlation between the parsimony score and the RF distance value of search path trees. Also, the observation...

Park, Hyun Jung

2009-05-15T23:59:59.000Z

325

IFT&E Industry Report Wind Turbine-Radar Interference Test Summary.  

SciTech Connect (OSTI)

Wind turbines have grown in size and capacity with today's average turbine having a power capacity of around 1.9 MW, reaching to heights of over 495 feet from ground to blade tip, and operating with speeds at the tip of the blade up to 200 knots. When these machines are installed within the line-of-sight of a radar system, they can cause significant clutter and interference, detrimentally impacting the primary surveillance radar (PSR) performance. The Massachusetts Institute of Technology's Lincoln Laboratory (MIT LL) and Sandia National Laboratories (SNL) were co-funded to conduct field tests and evaluations over two years in order to: I. Characterize the impact of wind turbines on existing Program-of-Record (POR) air surveillance radars; II. Assess near-term technologies proposed by industry that have the potential to mitigate the interference from wind turbines on radar systems; and III. Collect data and increase technical understanding of interference issues to advance development of long-term mitigation strategies. MIT LL and SNL managed the tests and evaluated resulting data from three flight campaigns to test eight mitigation technologies on terminal (short) and long-range (60 nmi and 250 nmi) radar systems. Combined across the three flight campaigns, more than 460 of hours of flight time were logged. This paper summarizes the Interagency Field Test & Evaluation (IFT&E) program and publicly- available results from the tests. It will also discuss the current wind turbine-radar interference evaluation process within the government and a proposed process to deploy mitigation technologies.

Karlson, Benjamin; LeBlanc, Bruce Philip; Minster, David G; Estill, Milford; Miller, Bryan Edward; Busse, Franz (MIT LL); Keck, Chris (MIT LL); Sullivan, Jonathan (MIT LL); Brigada, David (MIT LL); Parker, Lorri (MIT LL); Younger, Richard (MIT LL); Biddle, Jason (MIT LL)

2014-10-01T23:59:59.000Z

326

Field Test Results of Using a Nacelle-Mounted Lidar for Improving Wind Energy Capture by Reducing Yaw Misalignment (Presentation)  

SciTech Connect (OSTI)

Presented at the Nordic Wind Power Conference on November 5, 2014. This presentation describes field-test campaigns performed at the National Wind Technology Center in which lidar technology was used to improve the yaw alignment of the Controls Advanced Research Turbine (CART) 2 and CART3 wind turbines. The campaigns demonstrated that whether by learning a correction function to the nacelle vane, or by controlling yaw directly with the lidar signal, a significant improvement in power capture was demonstrated.

Fleming, P.; Scholbrock, A.; Wright, A.

2014-11-01T23:59:59.000Z

327

Large-scale dynamic compaction demonstration using WIPP salt: Fielding and preliminary results  

SciTech Connect (OSTI)

Reconsolidation of crushed rock salt is a phenomenon of great interest to programs studying isolation of hazardous materials in natural salt geologic settings. Of particular interest is the potential for disaggregated salt to be restored to nearly an impermeable state. For example, reconsolidated crushed salt is proposed as a major shaft seal component for the Waste Isolation Pilot Plant (WIPP) Project. The concept for a permanent shaft seal component of the WIPP repository is to densely compact crushed salt in the four shafts; an effective seal will then be developed as the surrounding salt creeps into the shafts, further consolidating the crushed salt. Fundamental information on placement density and permeability is required to ensure attainment of the design function. The work reported here is the first large-scale compaction demonstration to provide information on initial salt properties applicable to design, construction, and performance expectations. The shaft seals must function for 10,000 years. Over this period a crushed salt mass will become less permeable as it is compressed by creep closure of salt surrounding the shaft. These facts preclude the possibility of conducting a full-scale, real-time field test. Because permanent seals taking advantage of salt reconsolidation have never been constructed, performance measurements have not been made on an appropriately large scale. An understanding of potential construction methods, achievable initial density and permeability, and performance of reconsolidated salt over time is required for seal design and performance assessment. This report discusses fielding and operations of a nearly full-scale dynamic compaction of mine-run WIPP salt, and presents preliminary density and in situ (in place) gas permeability results.

Ahrens, E.H.; Hansen, F.D. [Sandia National Labs., Albuquerque, NM (United States). Nuclear Waste Technology Repository Isolation Systems

1995-10-01T23:59:59.000Z

328

Large-Scale Malaria Treatment in the Private Sector: A Case Study of the Cambodian Experience  

E-Print Network [OSTI]

in 1993 to address child survival (safe water and diarrhea treatment), HIV/AIDS, ma- lariaLarge-Scale Malaria Treatment in the Private Sector: A Case Study of the Cambodian Experience #12;#12;Large-Scale Malaria Treatment in the Private Sector: A Case Study of the Cambodian Experience #12

Klein, Ophir

329

ORNL/TM-2011/455 Large Scale Duty Cycle (LSDC) Project  

E-Print Network [OSTI]

ORNL/TM-2011/455 Large Scale Duty Cycle (LSDC) Project: Tractive Energy Analysis Methodology and Results from Long-Haul Truck Drive Cycle Evaluations May 2011 Prepared by Tim LaClair #12;#12;ORNL/TM-2011/455 Energy and Transportation Science Division LARGE SCALE DUTY CYCLE (LSDC) PROJECT: TRACTIVE ENERGY

330

Autonomous and Energy-Aware Management of Large-Scale Cloud Infrastructures  

E-Print Network [OSTI]

Autonomous and Energy-Aware Management of Large-Scale Cloud Infrastructures Eugen Feller Advisor.e. self-organization and healing); (3) energy-awareness. However, existing open-source cloud management, and energy-aware resource management frameworks for large-scale cloud infrastructures. Particularly, a novel

Paris-Sud XI, Université de

331

LARGE-SCALE MOVEMENT PATTERNS OF MALE LOGGERHEAD SEA TURTLES (CARETTA CARETTA)  

E-Print Network [OSTI]

LARGE-SCALE MOVEMENT PATTERNS OF MALE LOGGERHEAD SEA TURTLES (CARETTA CARETTA) IN SHARK BAY Management Title of Thesis: Large-Scale Movement Patterns of Male Loggerhead Sea Turtles (Caretta caretta) in Shark Bay, Australia Report No. 524 Examining Committee: Chair: Christine Gruman Master of Resource

332

SEQUENCING TECHNOLOGIES Microdroplet-based PCR enrichment for large-scale  

E-Print Network [OSTI]

SEQUENCING TECHNOLOGIES Microdroplet-based PCR enrichment for large-scale targeted sequencing.1126/science.1181498) Genome sequencing for large-scale population-based studies requires technologies generated in this study is expected to be a useful resource for examining the molecular characteristics

Rosenberg, Noah

333

Harvesting Clean Energy How California Can Deploy Large-Scale Renewable  

E-Print Network [OSTI]

Harvesting Clean Energy How California Can Deploy Large-Scale Renewable Energy Projects Harvesting Clean Energy: How California Can Deploy Large-Scale Renewable Energy Projects on Appropriate acres of impaired lands in the Westlands Water District in the Central Valley may soon have

Kammen, Daniel M.

334

Room-temperature stationary sodium-ion batteries for large-scale electric energy storage  

E-Print Network [OSTI]

energy and utility applications, such as pump hydro, compressed air, y-wheel and electrochemicalRoom-temperature stationary sodium-ion batteries for large-scale electric energy storage Huilin Pan attention particularly in large- scale electric energy storage applications for renewable energy and smart

Wang, Wei Hua

335

An Energy-Efficient Framework for Large-Scale Parallel Storage Systems  

E-Print Network [OSTI]

An Energy-Efficient Framework for Large-Scale Parallel Storage Systems Ziliang Zong, Matt Briggs-scale and energy-efficient parallel storage systems. To validate the efficiency of the proposed framework, a buffer that this new framework can significantly improves the energy efficiency of large-scale parallel storage systems

Qin, Xiao

336

Evaluating the Potential for Large-Scale Biodiesel Deployments in a Global Context  

E-Print Network [OSTI]

Evaluating the Potential for Large-Scale Biodiesel Deployments in a Global Context by Matthew Johnston. All rights reserved. #12;#12;Evaluating the Potential for Large-Scale Biodiesel Deployments on the subject of biodiesel, but I can only hope she takes comfort knowing now much I appreciate everything she

Wisconsin at Madison, University of

337

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

E-Print Network [OSTI]

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

338

A Study of the Coverage of Large-scale Sensor Benyuan Liu  

E-Print Network [OSTI]

networks. I. INTRODUCTION Advances in micro-sensor and communication technologies have made it possibleA Study of the Coverage of Large-scale Sensor Networks Benyuan Liu Department of Computer Science study the coverage properties of large-scale sensor networks. Three coverage measures are defined

Liu, Benyuan

339

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion  

E-Print Network [OSTI]

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion Peer a new topological framework for the analysis of large scale, time-varying, turbulent combustion consumption thresh- olds for an entire time-dependent combustion simulation. By computing augmented merge

Knowles, David William

340

Evaluation of Segmentation Techniques for Inventory Management in Large Scale Multi-Item Inventory Systems1  

E-Print Network [OSTI]

1 Evaluation of Segmentation Techniques for Inventory Management in Large Scale Multi-Item Inventory Systems1 Manuel D. Rossetti2 , Ph. D., P. E. Department of Industrial Engineering University of their inventory policies in a large-scale multi-item inventory system. Conventional inventory segmentation

Rossetti, Manuel D.

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


341

Towards Automatic Incorporation of Search engines into a Large-Scale Metasearch Engine  

E-Print Network [OSTI]

Towards Automatic Incorporation of Search engines into a Large-Scale Metasearch Engine Zonghuan Wu. of Computer Science Univ. of Illinois at Chicago yu@cs.uic.edu Abstract A metasearch engine supports unified access to multiple component search engines. To build a very large-scale metasearch engine that can

Meng, Weiyi

342

Large-Scale Integration of Deferrable Demand and Renewable Energy Sources  

E-Print Network [OSTI]

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

Oren, Shmuel S.

343

Introduction Large-scale circulation Clouds Conclusions European temperature extremes in CMIP5  

E-Print Network [OSTI]

Introduction Large-scale circulation Clouds Conclusions European temperature extremes in CMIP5 extremes in CMIP5 EUCLIPSE ­ May 2012 ­ Paris #12;Introduction Large-scale circulation Clouds Conclusions Introduction Objectives European temperature extremes: understand model biases & uncertainties under future

Ribes, Aurélien

344

QA-Pagelet: Data Preparation Techniques for Large-Scale Data Analysis of the Deep Web  

E-Print Network [OSTI]

QA-Pagelet: Data Preparation Techniques for Large-Scale Data Analysis of the Deep Web James the QA-Pagelet as a fundamental data preparation technique for large-scale data analysis of the Deep Web-Pagelets from the Deep Web. Two unique features of the Thor framework are 1) the novel page clustering

Caverlee, James

345

QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web  

E-Print Network [OSTI]

1 QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web James data preparation technique for large scale data analysis of the Deep Web. To support QA the Deep Web. Two unique features of the Thor framework are (1) the novel page clustering for grouping

Liu, Ling

346

Large-scale well aligned carbon nitride nanotube films: Low temperature growth and electron field emission  

E-Print Network [OSTI]

Large-scale well aligned carbon nitride nanotube films: Low temperature growth and electron field emission Dingyong Zhong, Shuang Liu, Guangyu Zhang, and E. G. Wanga) State Key Laboratory for Surface Received 2 January 2001; accepted for publication 13 March 2001 Large-scale well aligned carbon nitride

Zhang, Guangyu

347

Evaluation of PM10 and Total Suspended Particulate Sampler Performance Through Wind Tunnel Testing  

E-Print Network [OSTI]

.................................................... 86 APPENDIX F SHARP-EDGE ORIFICE METER CALIBRATION PROCEDURE ................................................................................ 89 APPENDIX G TEXAS A&M WIND TUNNEL OPERATION PROCEDURE ... 92 APPENDIX H MALVER MASTERSIZER 2000... Velocity Uniformity ?10% for 2, 8 and 24 km/h Measurement 1) Minimum of 12 test points 2) Monitoring techniques: precision? 2% ; accuracy ? 5% Aerosol Concentration Uniformity ?10% of the mean Measurement ? 5 evenly spaced isokinetic samplers...

Thelen, Mary Katherine

2011-10-21T23:59:59.000Z

348

Surpassing Expectations: State of the U.S. Wind Power Market  

E-Print Network [OSTI]

States, new large-scale wind turbines were installed in 18The average size of wind turbines installed in the Uniteddominant manufacturer of wind turbines supplying the U.S.

Bolinger, Mark A

2009-01-01T23:59:59.000Z

349

The Cost of Transmission for Wind Energy: A Review of Transmission Planning Studies  

E-Print Network [OSTI]

pdf/0554(2008).pdf European Wind Energy Association (EWEA).Large Scale Integration of Wind Energy in the European PowerPrepared by the European Wind Energy Association. http://

Mills, Andrew D.

2009-01-01T23:59:59.000Z

350

Non-Stationary Random Process for Large-Scale Failure and Recovery of Power Distributions  

E-Print Network [OSTI]

A key objective of the smart grid is to improve reliability of utility services to end users. This requires strengthening resilience of distribution networks that lie at the edge of the grid. However, distribution networks are exposed to external disturbances such as hurricanes and snow storms where electricity service to customers is disrupted repeatedly. External disturbances cause large-scale power failures that are neither well-understood, nor formulated rigorously, nor studied systematically. This work studies resilience of power distribution networks to large-scale disturbances in three aspects. First, a non-stationary random process is derived to characterize an entire life cycle of large-scale failure and recovery. Second, resilience is defined based on the non-stationary random process. Close form analytical expressions are derived under specific large-scale failure scenarios. Third, the non-stationary model and the resilience metric are applied to a real life example of large-scale disruptions due t...

Wei, Yun; Galvan, Floyd; Couvillon, Stephen; Orellana, George; Momoh, James

2012-01-01T23:59:59.000Z

351

Wind-electric icemaking project: Analysis and dynamometer testing. Volume 1  

SciTech Connect (OSTI)

The wind/hybrid systems group at the National Renewable Energy Laboratory has been researching the most practical and cost-effective methods for producing ice from off-grid wind-electric power systems. The first phase of the project, conducted in 1993--1994, included full-scale dynamometer and field testing of two different electric ice makers directly connected to a permanent magnet alternator. The results of that phase were encouraging and the second phase of the project was launched in which steady-state and dynamic numerical models of these systems were developed and experimentally validated. The third phase of the project was the dynamometer testing of the North Star ice maker, which is powered by a 12-kilowatt Bergey Windpower Company, Inc., alternator. This report describes both the second and third project phases. Also included are detailed economic analyses and a discussion of the future prospects of wind-electric ice-making systems. The main report is contained in Volume 1. Volume 2 consists of the report appendices, which include the actual computer programs used in the analysis and the detailed test results.

Holz, R.; Gervorgian, V.; Drouilhet, S.; Muljadi, E.

1998-07-01T23:59:59.000Z

352

Wind-electric icemaking project: Analysis and dynamometer testing. Volume 2  

SciTech Connect (OSTI)

The wind/hybrid systems group at the National Renewable Energy Laboratory has been researching the most practical and cost-effective methods for producing ice from off-grid wind-electric power systems. The first phase of the project, conducted in 1993--1994, included full-scale dynamometer and field testing of two different electric ice makers directly connected to a permanent magnet alternator. The results of that phase were encouraging and the second phase of the project was launched in which steady-state and dynamic numerical models of these systems were developed and experimentally validated. The third phase of the project was the dynamometer testing of the North Star ice maker, which is powered by a 12-kilowatt Bergey Windpower Company, Inc., alternator. This report describes both the second and third project phases. Also included are detailed economic analyses and a discussion of the future prospects of wind-electric ice-making systems. The main report is contained in Volume 1. Volume 2 consists of the report appendices, which include the actual computer programs used in the analysis and the detailed test results.

Holz, R.; Gervorgian, V.; Drouilhet, S.; Muljadi, E.

1998-07-01T23:59:59.000Z

353

66 APRIL | 2010 The FuTure oF Wind Turbine  

E-Print Network [OSTI]

66 APRIL | 2010 The FuTure oF Wind Turbine diagnosTics Wind energy is undergoing expansion in the form of large-scale wind farms, wind energy cooperatives, wind turbines owned by indi- vidual investors of wind turbines, operation and maintenance (O&M) costs remain high due to failures of wind turbine

Kusiak, Andrew

354

Extended tension leg platform design for offshore wind turbine systems  

E-Print Network [OSTI]

The rise of reliable wind energy application has become a primary alternative to conventional fossil fuel power plants in the United States and around the world. The feasibility of building large scale wind farms has become ...

Parker, Nicholas W. (Nicholas William)

2007-01-01T23:59:59.000Z

355

Value Capture in the Global Wind Energy Industry  

E-Print Network [OSTI]

a large scale wind turbine are the tower, blades, and gearof large wind turbine (REpower MM92) Tower Rotor blades Gearwind turbine. Towers run from 40-100 meters, while blades

Dedrick, Jason; Kraemer, Kenneth L.

2011-01-01T23:59:59.000Z

356

Wind Technology Testing Center Earns A2LA Accreditation for Blade Testing |  

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 on Delicious Rank EERE:YearRound-Up from theDepartment of Dept.| WEATHERIZATION5 |and Analysis |3 Wind Program2Department

357

WindTurbineGenerator Introduction of the Renewable Micro-Grid Test-Bed  

E-Print Network [OSTI]

Simulator Wind Turbine: PMSM, 3kW, 8.3A Wind Generator: PMSM, 3kW, 8.3A 3 AC/DC Converter & DC/AC Inverter Wind Turbine: Torque or Speed Control Wind Generator: PQ Control Cubicle #4: Energy Storage Generator #1 3kW, 8.3A Wind Turbine #1 3kW, 8.3A Wind Turbine #2 3kW Wind Generator #2 3kW RS232

Johnson, Eric E.

358

Community small scale wind farms for New Zealand: a comparative study of Austrian development, with consideration for New Zealand's future wind energy development.  

E-Print Network [OSTI]

??In New Zealand, the development of wind energy is occurring predominantly at a large scale level with very little opportunity for local people to become… (more)

Thomson, Grant

2008-01-01T23:59:59.000Z

359

Design and evaluation of large scale pultruded fiberglass tubular structures  

SciTech Connect (OSTI)

Large solid wood structures have been used in structural applications such as utility poles and marine pilings for a long time. A pultruded fiberglass reinforced polymer composite utility pole has been designed by the Composite Power Corporation of Las Vegas, Nevada which meets or exceeds the wood pole strength standards. This type of pole has many advantages over traditional wood, metal or concrete poles including: lighter weight, easier to climb and service, better dielectric and fire resistance properties, and it is more environmentally sound than treated wood poles. Utility crossarms, other attachments, and climbing devices are secured to grooves which run the entire length of the pole so there is no need to drill holes or wear spiked boots which would compromise the strength of the pole. Bending and torsion experiments have been conducted to determine if the present design meets the strength requirements of a forty foot Class one wood pole. Initial results of the composite pole tests showed a 17 percent advantage in bending strength, a 449 percent advantage in strength due to a vertical load applied to a crossarm, and a 43 percent advantage in twisting strength. Plans for further material characterization experiments and detailed stress and failure analysis are discussed.

O`Toole, B.J. [Univ. of Nevada, Las Vegas, NV (United States). Mechanical Engineering Department

1994-12-31T23:59:59.000Z

360

Uncertainty quantification for large-scale ocean circulation predictions.  

SciTech Connect (OSTI)

Uncertainty quantificatio in climate models is challenged by the sparsity of the available climate data due to the high computational cost of the model runs. Another feature that prevents classical uncertainty analyses from being easily applicable is the bifurcative behavior in the climate data with respect to certain parameters. A typical example is the Meridional Overturning Circulation in the Atlantic Ocean. The maximum overturning stream function exhibits discontinuity across a curve in the space of two uncertain parameters, namely climate sensitivity and CO{sub 2} forcing. We develop a methodology that performs uncertainty quantificatio in the presence of limited data that have discontinuous character. Our approach is two-fold. First we detect the discontinuity location with a Bayesian inference, thus obtaining a probabilistic representation of the discontinuity curve location in presence of arbitrarily distributed input parameter values. Furthermore, we developed a spectral approach that relies on Polynomial Chaos (PC) expansions on each sides of the discontinuity curve leading to an averaged-PC representation of the forward model that allows efficient uncertainty quantification and propagation. The methodology is tested on synthetic examples of discontinuous data with adjustable sharpness and structure.

Safta, Cosmin; Debusschere, Bert J.; Najm, Habib N.; Sargsyan, Khachik

2010-09-01T23:59:59.000Z

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


361

Necessity and Requirements of a Collaborative Effort to Develop a Large Wind Turbine Blade Test Facility in North America  

SciTech Connect (OSTI)

The wind power industry in North America has an immediate need for larger blade test facilities to ensure the survival of the industry. Blade testing is necessary to meet certification and investor requirements and is critical to achieving the reliability and blade life needed for the wind turbine industry to succeed. The U.S. Department of Energy's (DOE's) Wind Program is exploring options for collaborating with government, private, or academic entities in a partnership to build larger blade test facilities in North America capable of testing blades up to at least 70 m in length. The National Renewable Energy Laboratory (NREL) prepared this report for DOE to describe the immediate need to pursue larger blade test facilities in North America, categorize the numerous prospective partners for a North American collaboration, and document the requirements for a North American test facility.

Cotrell, J.; Musial, W.; Hughes, S.

2006-05-01T23:59:59.000Z

362

Census: Location-Aware Membership Management for Large-Scale Distributed Systems  

E-Print Network [OSTI]

We present Census, a platform for building large-scale distributed applications. Census provides a membership service and a multicast mechanism. The membership service provides every node with a consistent view of the ...

Cowling, James Alexander

363

Modeling and Analysis of Large-Scale On-Chip Interconnects  

E-Print Network [OSTI]

in computer aided design areas. This dissertation presents new methodologies for addressing the above two important challenging issues for large scale on-chip interconnect modeling and analysis: In the past, the standard statistical circuit modeling techniques...

Feng, Zhuo

2010-07-14T23:59:59.000Z

364

E-Print Network 3.0 - air reveals large-scale Sample Search Results  

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

Reduce PS,1,1,0,Pa, surface... 12;LargeScale Data Analytics beyond MapReduce Text Mining in the Biosciences Cleansing ... Source: Swedish Institute of Computer Science,...

365

Large-Scale Identification of Single-Feature Polymorphisms in Complex Genomes  

E-Print Network [OSTI]

Large-Scale Identification of Single-Feature Polymorphisms in Complex Genomes Justin O. Borevitz,1 hybridization can be combined with bulk segregant analysis to quickly map mutations. The extension

Kihara, Daisuke

366

Programmable window : a large-scale transparent electronic display using SPD film  

E-Print Network [OSTI]

This research demonstrates that Suspended Particle Device (SPD) film is a viable option for the development of large-scale transparent display systems. The thesis analyzes the SPD film from an architectural display application ...

Ramos, Martin (Ramos Rizo-Patron)

2004-01-01T23:59:59.000Z

367

Chemical engineers design, control and optimize large-scale chemical, physicochemical and  

E-Print Network [OSTI]

, Biochemical, Environmental, Petroleum Engineering and Nantoechnology. CHEMICAL&MATERIALSSCIENCE CHE OVERVIEW of Science 131 units · Chemical Engineering (Petroleum) Bachelor of Science 136 units · Chemical Engineering38 Chemical engineers design, control and optimize large-scale chemical, physicochemical

Rohs, Remo

368

Large scale oceanic circulation and fluxes of freshwater, heat, nutrients and oxygen  

E-Print Network [OSTI]

A new, global inversion is used to estimate the large scale oceanic circulation based on the World Ocean Circulation Experiment and Java Australia Dynamic Experiment hydrographic data. A linear inverse "box" model is used ...

Ganachaud, Alexandre Similien, 1970-

2000-01-01T23:59:59.000Z

369

A Warm-Start Approach for Large-Scale Stochastic Linear Programs  

E-Print Network [OSTI]

Aug 29, 2006 ... A Warm-Start Approach for Large-Scale Stochastic Linear Programs ... so that it can be seen as a structure-exploiting initial point generator.

Marco Colombo

2006-08-29T23:59:59.000Z

370

Membraneless hydrogen bromine laminar flow battery for large-scale energy storage  

E-Print Network [OSTI]

Electrochemical energy storage systems have been considered for a range of potential large-scale energy storage applications. These applications vary widely, both in the order of magnitude of energy storage that is required ...

Braff, William Allan

2014-01-01T23:59:59.000Z

371

The role of large-scale, extratropical dynamics in climate change  

SciTech Connect (OSTI)

The climate modeling community has focused recently on improving our understanding of certain processes, such as cloud feedbacks and ocean circulation, that are deemed critical to climate-change prediction. Although attention to such processes is warranted, emphasis on these areas has diminished a general appreciation of the role played by the large-scale dynamics of the extratropical atmosphere. Lack of interest in extratropical dynamics may reflect the assumption that these dynamical processes are a non-problem as far as climate modeling is concerned, since general circulation models (GCMs) calculate motions on this scale from first principles. Nevertheless, serious shortcomings in our ability to understand and simulate large-scale dynamics exist. Partly due to a paucity of standard GCM diagnostic calculations of large-scale motions and their transports of heat, momentum, potential vorticity, and moisture, a comprehensive understanding of the role of large-scale dynamics in GCM climate simulations has not been developed. Uncertainties remain in our understanding and simulation of large-scale extratropical dynamics and their interaction with other climatic processes, such as cloud feedbacks, large-scale ocean circulation, moist convection, air-sea interaction and land-surface processes. To address some of these issues, the 17th Stanstead Seminar was convened at Bishop`s University in Lennoxville, Quebec. The purpose of the Seminar was to promote discussion of the role of large-scale extratropical dynamics in global climate change. Abstracts of the talks are included in this volume. On the basis of these talks, several key issues emerged concerning large-scale extratropical dynamics and their climatic role. Individual records are indexed separately for the database.

Shepherd, T.G. [ed.

1994-02-01T23:59:59.000Z

372

Modelling of an integrated gas and electricity network with significant wind capacity.  

E-Print Network [OSTI]

??The large scale integration of wind generation capacity into an electricity network poses technical as well as economic challenges. In this research, three major challenges… (more)

Qadrdan, Meysam

2012-01-01T23:59:59.000Z

373

Matter & Energy Wind Energy  

E-Print Network [OSTI]

See Also: Matter & Energy Wind Energy Energy Technology Physics Nuclear Energy Petroleum 27, 2012) -- Energy flowing from large-scale to small-scale places may be prevented from flowing, indicating that there are energy flows from large to small scale in confined space. Indeed, under a specific

Shepelyansky, Dima

374

Large-Scale Urban Decontamination; Developments, Historical Examples and Lessons Learned  

SciTech Connect (OSTI)

Recent terrorist threats and actual events have lead to a renewed interest in the technical field of large scale, urban environment decontamination. One of the driving forces for this interest is the real potential for the cleanup and removal of radioactive dispersal device (RDD or “dirty bomb”) residues. In response the U. S. Government has spent many millions of dollars investigating RDD contamination and novel decontamination methodologies. Interest in chemical and biological (CB) cleanup has also peaked with the threat of terrorist action like the anthrax attack at the Hart Senate Office Building and with catastrophic natural events such as Hurricane Katrina. The efficiency of cleanup response will be improved with these new developments and a better understanding of the “old reliable” methodologies. Perhaps the most interesting area of investigation for large area decontamination is that of the RDD. While primarily an economic and psychological weapon, the need to cleanup and return valuable or culturally significant resources to the public is nonetheless valid. Several private companies, universities and National Laboratories are currently developing novel RDD cleanup technologies. Because of its longstanding association with radioactive facilities, the U. S. Department of Energy National Laboratories are at the forefront in developing and testing new RDD decontamination methods. However, such cleanup technologies are likely to be fairly task specific; while many different contamination mechanisms, substrate and environmental conditions will make actual application more complicated. Some major efforts have also been made to model potential contamination, to evaluate both old and new decontamination techniques and to assess their readiness for use. Non-radioactive, CB threats each have unique decontamination challenges and recent events have provided some examples. The U. S. Environmental Protection Agency (EPA), as lead agency for these emergency cleanup responses, has a sound approach for decontamination decision-making that has been applied several times. The anthrax contamination at the U. S. Hart Senate Office Building and numerous U. S. Post Office facilities are examples of employing novel technical responses. Decontamination of the Hart Office building required development of a new approach for high level decontamination of biological contamination as well as techniques for evaluating the technology effectiveness. The World Trade Center destruction also demonstrated the need for, and successful implementation of, appropriate cleanup methodologies. There are a number of significant lessons that can be gained from a look at previous large scale cleanup projects. Too often we are quick to apply a costly “package and dispose” method when sound technological cleaning approaches are available. Understanding historical perspectives, advanced planning and constant technology improvement are essential to successful decontamination.

Rick Demmer

2007-02-01T23:59:59.000Z

375

Spider Optimization: Probing the Systematics of a Large Scale B-Mode Experiment  

E-Print Network [OSTI]

Spider is a long-duration, balloon-borne polarimeter designed to measure large scale Cosmic Microwave Background (CMB) polarization with very high sensitivity and control of systematics. The instrument will map over half the sky with degree angular resolution in I, Q and U Stokes parameters, in four frequency bands from 96 to 275 GHz. Spider's ultimate goal is to detect the primordial gravity wave signal imprinted on the CMB B-mode polarization. One of the challenges in achieving this goal is the minimization of the contamination of B-modes by systematic effects. This paper explores a number of instrument systematics and observing strategies in order to optimize B-mode sensitivity. This is done by injecting realistic-amplitude, time-varying systematics in a set of simulated time-streams. Tests of the impact of detector noise characteristics, pointing jitter, payload pendulations, polarization angle offsets, beam systematics and receiver gain drifts are shown. Spider's default observing strategy is to spin continuously in azimuth, with polarization modulation achieved by either a rapidly spinning half-wave plate or a rapidly spinning gondola and a slowly stepped half-wave plate. Although the latter is more susceptible to systematics, results shown here indicate that either mode of operation can be used by Spider.

C. J. MacTavish; P. A. R. Ade; E. S. Battistelli; S. Benton; R. Bihary; J. J. Bock; J. R. Bond; J. Brevik; S. Bryan; C. R. Contaldi; B. P. Crill; O. Doré; L. Fissel; S. R. Golwala; M. Halpern; G. Hilton; W. Holmes; V. V. Hristov; K. Irwin; W. C. Jones; C. L. Kuo; A. E. Lange; C. Lawrie; T. G. Martin; P. Mason; T. E. Montroy; C. B. Netterfield; D. Riley; J. E. Ruhl; A. Trangsrud; C. Tucker; A. Turner; M. Viero; D. Wiebe

2007-10-01T23:59:59.000Z

376

Thermal Performance Evaluation of Attic Radiant Barrier Systems Using the Large Scale Climate Simulator (LSCS)  

SciTech Connect (OSTI)

Application of radiant barriers and low-emittance surface coatings in residential building attics can significantly reduce conditioning loads from heat flow through attic floors. The roofing industry has been developing and using various radiant barrier systems and low-emittance surface coatings to increase energy efficiency in buildings; however, minimal data are available that quantifies the effectiveness of these technologies. This study evaluates performance of various attic radiant barrier systems under simulated summer daytime conditions and nighttime or low solar gain daytime winter conditions using the large scale climate simulator (LSCS). The four attic configurations that were evaluated are 1) no radiant barrier (control), 2) perforated low-e foil laminated oriented strand board (OSB) deck, 3) low-e foil stapled on rafters, and 4) liquid applied low-emittance coating on roof deck and rafters. All test attics used nominal RUS 13 h-ft2- F/Btu (RSI 2.29 m2-K/W) fiberglass batt insulation on attic floor. Results indicate that the three systems with radiant barriers had heat flows through the attic floor during summer daytime condition that were 33%, 50%, and 19% lower than the control, respectively.

Shrestha, Som S [ORNL] [ORNL; Miller, William A [ORNL] [ORNL; Desjarlais, Andre Omer [ORNL] [ORNL

2013-01-01T23:59:59.000Z

377

Base excitation testing system using spring elements to pivotally mount wind turbine blades  

DOE Patents [OSTI]

A system (1100) for fatigue testing wind turbine blades (1102) through forced or resonant excitation of the base (1104) of a blade (1102). The system (1100) includes a test stand (1112) and a restoring spring assembly (1120) mounted on the test stand (1112). The restoring spring assembly (1120) includes a primary spring element (1124) that extends outward from the test stand (1112) to a blade mounting plate (1130) configured to receive a base (1104) of blade (1102). During fatigue testing, a supported base (1104) of a blad (1102) may be pivotally mounted to the test stand (1112) via the restoring spring assembly (1120). The system (1100) may include an excitation input assembly (1140) that is interconnected with the blade mouting plate (1130) to selectively apply flapwise, edgewise, and/or pitch excitation forces. The restoring spring assemply (1120) may include at least one tuning spring member (1127) positioned adjacent to the primary spring element (1124) used to tune the spring constant or stiffness of the primary spring element (1124) in one of the excitation directions.

Cotrell, Jason; Hughes, Scott; Butterfield, Sandy; Lambert, Scott

2013-12-10T23:59:59.000Z

378

Preface: The Dalmarnock Fire Tests   

E-Print Network [OSTI]

Given the current state of the art, the vibrancy of the profession and existing data from numerous large scale tests, why are new large scale experiments like the Dalmarnock Tests important or, indeed, even necessary?

Torero, Jose L; Carvel, Ricky O

2007-11-14T23:59:59.000Z

379

A Systematic Approach to the Design of a Large Scale Detritiation System for Controlled Thermonuclear Fusion Experiments  

E-Print Network [OSTI]

A Systematic Approach to the Design of a Large Scale Detritiation System for Controlled Thermonuclear Fusion Experiments

380

Summary of Conclusions and Recommendations Drawn from the DeepCWind Scaled Floating Offshore Wind System Test Campaign: Preprint  

SciTech Connect (OSTI)

The DeepCwind consortium is a group of universities, national labs, and companies funded under a research initiative by the U.S. Department of Energy (DOE) to support the research and development of floating offshore wind power. The two main objectives of the project are to better understand the complex dynamic behavior of floating offshore wind systems and to create experimental data for use in validating the tools used in modeling these systems. In support of these objectives, the DeepCwind consortium conducted a model test campaign in 2011 of three generic floating wind systems, a tension-leg platform (TLP), a spar-buoy (spar), and a semisubmersible (semi). Each of the three platforms was designed to support a 1/50th-scale model of a 5 MW wind turbine and was tested under a variety of wind/wave conditions. The focus of this paper is to summarize the work done by consortium members in analyzing the data obtained from the test campaign and its use for validating the offshore wind modeling tool, FAST.

Robertson, A. N.; Jonkman, J. M.; Masciola, M. D.; Molta, P.; Goupee, A. J.; Coulling, A. J.; Prowell, I.; Browning, J.

2013-07-01T23:59:59.000Z

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


381

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

E-Print Network [OSTI]

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage Yuan Yang,a Guangyuan Zhengb and Yi Cui*ac Large-scale energy storage represents a key challenge for renewable energy develop a new lithium/ polysulfide (Li/PS) semi-liquid battery for large-scale energy storage

Cui, Yi

382

MMR: A Platform for Large-Scale Forensic Computing Vassil Roussev, Liqiang Wang, Golden G. Richard III, Lodovico Marziale  

E-Print Network [OSTI]

ii MMR: A Platform for Large-Scale Forensic Computing Vassil Roussev, Liqiang Wang, Golden G-SCALE FORENSIC COMPUTING Middleware Support for MapReduce Processing Abstract The timely processing of large-scale digital forensic targets demands the empoyment of large-scale distributed resources, as well

Richard III, Golden G.

383

European Wind Energy Conference & Exhibition EWEC 2003, Madrid, Spain. Forecasting of Regional Wind Generation by a Dynamic  

E-Print Network [OSTI]

European Wind Energy Conference & Exhibition EWEC 2003, Madrid, Spain. Forecasting of Regional Wind. Abstract-Short-term wind power forecasting is recognized nowadays as a major requirement for a secure and economic integration of wind power in a power system. In the case of large-scale integration, end users

Paris-Sud XI, Université de

384

STANDARDS FOR MEASUREMENTS AND TESTING OF WIND TURBINE POWER QUALITY Poul Srensen, Ris National Laboratory, P.O.Box 49, DK-4000 Roskilde, Denmark.  

E-Print Network [OSTI]

STANDARDS FOR MEASUREMENTS AND TESTING OF WIND TURBINE POWER QUALITY Poul Sørensen, Risø National and verification of wind turbine power quality. The work has been organised in three major activities. The first farm summation on the power quality of wind turbines with constant rotor speed. The third activity has

Heinemann, Detlev

385

What Will the Neighbors Think? Building Large-Scale Science Projects Around the World  

ScienceCinema (OSTI)

Public participation is an essential ingredient for turning the International Linear Collider into a reality. Wherever the proposed particle accelerator is sited in the world, its neighbors -- in any country -- will have something to say about hosting a 35-kilometer-long collider in their backyards. When it comes to building large-scale physics projects, almost every laboratory has a story to tell. Three case studies from Japan, Germany and the US will be presented to examine how community relations are handled in different parts of the world. How do particle physics laboratories interact with their local communities? How do neighbors react to building large-scale projects in each region? How can the lessons learned from past experiences help in building the next big project? These and other questions will be discussed to engage the audience in an active dialogue about how a large-scale project like the ILC can be a good neighbor.

Craig Jones, Christian Mrotzek, Nobu Toge and Doug Sarno

2010-01-08T23:59:59.000Z

386

Theory of large-scale turbulent transport of chemically active pollutants  

SciTech Connect (OSTI)

This paper shows that ordered Turing structures may be produced in the large-scale turbulent mixing of chemically active pollutants as a result of statistical instability of the spatially homogeneous state. Threshold values are obtained for the variance of a random non-Gaussian velocity field, beyond which this statistical instability is realized even in two-component systems with quadratically nonlinear kinetics. The possibility for the formation of large-scale spatially non-homogeneous concentration distributions of chemically active pollutants by this mechanism is examined.

Chefranov, S.G.

1986-01-01T23:59:59.000Z

387

Observation of femtosecond laser-induced nanostructure-covered large scale waves on metals  

SciTech Connect (OSTI)

Following femtosecond (fs) laser pulse irradiation, we produce a type of periodic surface structure with a period tens of times greater than the laser wavelength and densely covered by an iterating pattern that consists of stripes of nanostructures and microscale cellular structures. The morphology of this large scale wave pattern crucially depends on laser fluence and the number of laser pulses, but not on the laser wavelength. Our study suggests that this large scale wave is initiated by fs laser induced surface unevenness followed by periodically distributed nonuniform surface heating from fs pulse irradiation.

Hwang, Taek Yong; Guo Chunlei [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

2011-04-15T23:59:59.000Z

388

Diffuse Pionic Gamma-Ray Emission from Large Scale Structures in the FERMI Era  

E-Print Network [OSTI]

For more than a decade now the complete origin of the diffuse gamma-ray emission background (EGRB) has been unknown. Major components like unresolved star-forming galaxies (making SFCR gamma-ray emission are weak (above the observed EGRB) in some case, in others, some of our models can provide a good fit to the observed EGRB. More importantly, we show that these large-scale shocks could still give an important contribution to the EGRB, especially at high energies. Future detections of cluster gamma-ray emission would help place tighter constraints on our models and give us a better insight into large-scale shocks forming around them.

Aleksandra Dobardzic; Tijana Prodanovic

2014-04-08T23:59:59.000Z

389

OPERATIONAL TEST OF SONIC WIND SENSORS AT KNMI Wiel M.F. Wauben  

E-Print Network [OSTI]

of transfer functions for wind direction, - speed and - gust that account for the change from one sensor vanes to measure wind speed and direction. Although the KNMI cup and vane meet WMO requirements into account by a wind direction and - speed dependent correction that is applied in the sensor software

Wauben, Wiel

390

Collaborative Visualization for Large-Scale Accelerator Electromagnetic Modeling (Final Report)  

SciTech Connect (OSTI)

This report contains the comprehensive summary of the work performed on the SBIR Phase II, Collaborative Visualization for Large-Scale Accelerator Electromagnetic Modeling at Kitware Inc. in collaboration with Stanford Linear Accelerator Center (SLAC). The goal of the work was to develop collaborative visualization tools for large-scale data as illustrated in the figure below. The solutions we proposed address the typical problems faced by geographicallyand organizationally-separated research and engineering teams, who produce large data (either through simulation or experimental measurement) and wish to work together to analyze and understand their data. Because the data is large, we expect that it cannot be easily transported to each team member's work site, and that the visualization server must reside near the data. Further, we also expect that each work site has heterogeneous resources: some with large computing clients, tiled (or large) displays and high bandwidth; others sites as simple as a team member on a laptop computer. Our solution is based on the open-source, widely used ParaView large-data visualization application. We extended this tool to support multiple collaborative clients who may locally visualize data, and then periodically rejoin and synchronize with the group to discuss their findings. Options for managing session control, adding annotation, and defining the visualization pipeline, among others, were incorporated. We also developed and deployed a Web visualization framework based on ParaView that enables the Web browser to act as a participating client in a collaborative session. The ParaView Web Visualization framework leverages various Web technologies including WebGL, JavaScript, Java and Flash to enable interactive 3D visualization over the web using ParaView as the visualization server. We steered the development of this technology by teaming with the SLAC National Accelerator Laboratory. SLAC has a computationally-intensive problem important to the nations scientific progress as described shortly. Further, SLAC researchers routinely generate massive amounts of data, and frequently collaborate with other researchers located around the world. Thus SLAC is an ideal teammate through which to develop, test and deploy this technology. The nature of the datasets generated by simulations performed at SLAC presented unique visualization challenges especially when dealing with higher-order elements that were addressed during this Phase II. During this Phase II, we have developed a strong platform for collaborative visualization based on ParaView. We have developed and deployed a ParaView Web Visualization framework that can be used for effective collaboration over the Web. Collaborating and visualizing over the Web presents the community with unique opportunities for sharing and accessing visualization and HPC resources that hitherto with either inaccessible or difficult to use. The technology we developed in here will alleviate both these issues as it becomes widely deployed and adopted.

William J. Schroeder

2011-11-13T23:59:59.000Z

391

IEEE TRANSACTIONS ON POWER SYSTEMS 1 Large-Scale Integration of Deferrable  

E-Print Network [OSTI]

. In order to accurately assess the impacts of renewable energy integration and demand response integration--We present a stochastic unit commitment model for assessing the impacts of the large-scale integration to accu- rately assess the impact of demand response integration on re- Manuscript received May 15, 2012

Oren, Shmuel S.

392

The impact of large scale biomass production on ozone air pollution in Joost B. Beltman a  

E-Print Network [OSTI]

The impact of large scale biomass production on ozone air pollution in Europe Joost B. Beltman a , Carlijn Hendriks a , Markus Tum b , Martijn Schaap a,* a TNO, Department of Climate, Air by up to 25% and 40%. Air pollution mitigation strategies should consider land use management. a r t i

Utrecht, Universiteit

393

Interaction of Turbomachinery Components in Large-scale Unsteady Computations of Jet Engines  

E-Print Network [OSTI]

Interaction of Turbomachinery Components in Large-scale Unsteady Computations of Jet Engines Georgi on the turbomachinery compu- tation and, in particular, on the physics of interaction of different turbomachinery will be discussed for these multi-component turbomachinery simulations. The compressor and turbine of a modern

Alonso, Juan J.

394

Identification of Market Power in Large-Scale Electric Energy Markets Bernard C. Lesieutre  

E-Print Network [OSTI]

Identification of Market Power in Large-Scale Electric Energy Markets Bernard C. Lesieutre Hyung and competitive operation of centrally- dispatched electricity markets. Traditional measures for market power demand and reserve requirements, a centrally-dispatched electricity market provides a transparent

395

Polymeric Electro-optic Modulators: From Chromophore Design to Integration with Semiconductor Very Large Scale Integration  

E-Print Network [OSTI]

Polymeric Electro-optic Modulators: From Chromophore Design to Integration with Semiconductor Very Large Scale Integration Electronics and Silica Fiber Optics L. Dalton, A. Harper, A. Ren, F. Wang, G California, Los Angeles, California 90089-1661 Chromophores with optimized second-order optical nonlinearity

396

Analysis and Management of Heterogeneous User Mobility in Large-scale Downlink Systems  

E-Print Network [OSTI]

Analysis and Management of Heterogeneous User Mobility in Large-scale Downlink Systems Axel M¨uller§, Emil Bj¨ornson§, Romain Couillet, and M´erouane Debbah§ Intel Mobile Communications, Sophia Antipolis, France ACCESS Linnaeus Centre, Signal Processing Lab, KTH Royal Institute of Technology, Sweden

Paris-Sud XI, Université de

397

Development and Deployment of a Large-Scale Flower Recognition Mobile App  

E-Print Network [OSTI]

engine and re- lies on computer vision recognition technology. The mobile phone app is available freeDevelopment and Deployment of a Large-Scale Flower Recognition Mobile App Anelia Angelova NEC Labs- eration of user generated content, especially from mobile de- vices, there is a need to develop

398

A Programming Model for Context-Aware Applications in Large-Scale Pervasive Systems  

E-Print Network [OSTI]

.g. pervasive health-care, city traffic monitoring, environmental monitoring, smart grids). These large- scale, and smart grids. These systems differ significantly from conventional context-aware systems, which focus. Examples of such trends are pervasive health-care, city traffic scheduling, environmental monitoring

Dustdar, Schahram

399

Domain Controlled Architecture A New Approach for Large Scale Software Integrated Automotive Systems  

E-Print Network [OSTI]

Domain Controlled Architecture A New Approach for Large Scale Software Integrated Automotive Scale Software Integration, LSSI, Automotive Real Time, Multi-core, Many-core, Embedded Automo- tive mobility domain. The automotive in- dustry is confronted with a rising system complexity and several

Kühnhauser, Winfried

400

THE PREV AIR SYSTEM, AN OPERATIONAL SYSTEM FOR LARGE SCALE AIR QUALITY FORECASTS OVER EUROPE; APPLICATIONS  

E-Print Network [OSTI]

THE PREV AIR SYSTEM, AN OPERATIONAL SYSTEM FOR LARGE SCALE AIR QUALITY FORECASTS OVER EUROPE Author ABSTRACT Since Summer 2003, the PREV'AIR system has been delivering through the Internet1 daily air quality forecasts over Europe. This is the visible part of a wider collaborative project

Paris-Sud XI, Université de

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


401

Seven League Boots: A New Metaphor for Augmented Locomotion through Moderately Large Scale Immersive Virtual Environments  

E-Print Network [OSTI]

Seven League Boots: A New Metaphor for Augmented Locomotion through Moderately Large Scale boots. The key characteristic of this method is that it involves determining a user's intended direction virtual hallway, participants overwhelmingly preferred the seven league boots method to the other methods

Interrante, Victoria

402

Realistic Large Scale ad hoc Animal Monitoring Bartosz Wietrzyk, Milena Radenkovic  

E-Print Network [OSTI]

Realistic Large Scale ad hoc Animal Monitoring Bartosz Wietrzyk, Milena Radenkovic School for profitability of animal production as well as welfare of animals and farmers. In this paper we define requirements for such monitoring on the basis of questionnaires distributed to potential users and processing

Aickelin, Uwe

403

Large-Scale Analysis of Individual and Task Differences in Search Result Page Examination Strategies  

E-Print Network [OSTI]

Large-Scale Analysis of Individual and Task Differences in Search Result Page Examination users examine results which are similar to those observed in small-scale studies. Our findings have differences on search result page examination strategies is important in develop- ing improved search engines

Dumais, Susan

404

Distinct large-scale turbulent-laminar states in transitional pipe flow  

E-Print Network [OSTI]

Distinct large-scale turbulent-laminar states in transitional pipe flow David Moxey1 and Dwight) When fluid flows through a channel, pipe, or duct, there are two basic forms of motion: smooth laminar numerical computations in pipes of variable lengths up to 125 diameters to investigate the nature of transi

Barkley, Dwight

405

China's changing landscape during the 1990s: Large-scale land transformations estimated with satellite data  

E-Print Network [OSTI]

China's changing landscape during the 1990s: Large-scale land transformations estimated January 2005. [1] Land-cover changes in China are being powered by demand for food for its growing increased by 2.99 million hectares and urban areas increased by 0.82 million hectares. In northern China

406

A Scalable Model for Energy Load Balancing in Large-scale Sensor Networks  

E-Print Network [OSTI]

A Scalable Model for Energy Load Balancing in Large-scale Sensor Networks Seung Jun Baek we consider how one might achieve more balanced energy burdens across the network by spreading sinks change their locations to balance the energy burdens incurred accross the network nodes [1

de Veciana, Gustavo

407

AnKLe: Detecting Attacks in Large Scale Systems via Information Emmanuelle Anceaume  

E-Print Network [OSTI]

AnKLe: Detecting Attacks in Large Scale Systems via Information Divergence Emmanuelle Anceaume. To address this issue, we propose AnKLe (for Attack-tolerant eNhanced Kullback- Leibler divergence Estimator), a novel algorithm for estimating the KL divergence of an observed stream compared to the expected one. AnKLe

Paris-Sud XI, Université de

408

AnKLe: Detecting Attacks in Large Scale Systems via Information Divergence  

E-Print Network [OSTI]

AnKLe: Detecting Attacks in Large Scale Systems via Information Divergence Emmanuelle Anceaume. To address this issue, we propose AnKLe (for Attack-tolerant eNhanced Kullback-Leibler di- vergence Estimator), a novel algorithm for estimating the KL divergence of an observed stream compared to the expected one. AnKLe

Boyer, Edmond

409

Funding for Large-Scale Sustainable Energy Projects Combining Expert Opinions to Support Decisions  

E-Print Network [OSTI]

Funding for Large-Scale Sustainable Energy Projects Combining Expert Opinions to Support Decisions for a sustainable energy future? Three teams, UMass, Harvard, and FEEM (Fondazione Eni Enrico Mattei), share a goal technologies to fund for optimal success for a sustainable energy future. Progress and Results · Created models

Mountziaris, T. J.

410

Studying the energy efficiency of large-scale computer systems requires models of the relationship  

E-Print Network [OSTI]

Abstract Studying the energy efficiency of large-scale computer systems requires models-node clusters using embedded, laptop, desktop, and server processors. These results demonstrate the need usage and power consumption. Therefore, a substantial body of literature models system-level power

Rivoire, Suzanne

411

Chimera: Large-Scale Classification using Machine Learning, Rules, and Crowdsourcing  

E-Print Network [OSTI]

Chimera: Large-Scale Classification using Machine Learning, Rules, and Crowdsourcing Chong Sun1 has been published on how this is done in practice. In this paper we describe Chimera, our solution solutions cease to work. We describe how Chimera employs a combination of learning, rules (created by in

Doan, AnHai

412

Water Consumption Footprint and Land Requirements of Large-Scale Alternative  

E-Print Network [OSTI]

the lifecycle green and blue water consumption footprints of producing: MD from conventional crude oil; Fischer on crude oil and the greenhouse gas intensity of transportation. However, the water and land resourceWater Consumption Footprint and Land Requirements of Large-Scale Alternative Diesel and Jet Fuel

413

Large Scale Distribution of Stochastic Control Algorithms for Gas Storage Constantinos Makassikis, Stephane Vialle  

E-Print Network [OSTI]

Large Scale Distribution of Stochastic Control Algorithms for Gas Storage Valuation Constantinos algorithm which is applied to gas storage valuation, and presents its experimental performances on two PC achieved in the field of gas storage valuation (see [2, 3] for example). As a result, many different price

Vialle, Stéphane

414

Facility Location under Demand Uncertainty: Response to a Large-scale Bioterror Attack  

E-Print Network [OSTI]

Facility Location under Demand Uncertainty: Response to a Large-scale Bioterror Attack Abstract In the event of a catastrophic bio-terror attack, major urban centers need to effi- ciently distribute large of a hypothetical anthrax attack in Los Angeles County. Keywords: Capacitated facility location, distance

Dessouky, Maged

415

Critical Perspectives on Large-Scale Distributed Applications and Production Grids  

E-Print Network [OSTI]

not progressed in phase. Progress in the next phase and generation of distributed applications will require that can seamlessly utilize distributed infrastructures in an extensible and scalable fashion. We believeCritical Perspectives on Large-Scale Distributed Applications and Production Grids Shantenu Jha1

Weissman, Jon

416

Prioritization of fish assemblages with a view to conservation and restoration on a large scale European  

E-Print Network [OSTI]

Prioritization of fish assemblages with a view to conservation and restoration on a large scale The hierarchical organization of important sites for the conservation or the restoration of fish communities, we developed a methodology, which is easy to implement in different locations. Based on the fish

Paris-Sud XI, Université de

417

Mining Induced Seismicity -Monitoring of a Large Scale Salt Cavern Collapse  

E-Print Network [OSTI]

Mining Induced Seismicity - Monitoring of a Large Scale Salt Cavern Collapse E. Klein* (Ineris), I in the Lorraine salt basin (France). To monitor the cavern collapse, a multi-parameter system featuring high of the roof cavern, with no ground surface movement detected. The high microseismic regime of the cavern has

Paris-Sud XI, Université de

418

Challenges and Opportunities in Large-Scale Deployment of Automated Energy Consumption  

E-Print Network [OSTI]

to the locational marginal price (LMP) at that bus. We show that a key challenge in large- scale deployment of ECS, locational marginal price. I. INTRODUCTION Real-time and time-of-use electricity pricing models can- edge among users on how to respond to time-varying prices and the lack of effective home automation

Mohsenian-Rad, Hamed

419

Imprinted large-scale high density polymer nanopillars for organic solar cells  

E-Print Network [OSTI]

Imprinted large-scale high density polymer nanopillars for organic solar cells Mukti Aryal used to make bulk heterojunction solar cells by depositing PCBM on top of the pillars. Imprinting provides a way to precisely control the interdigitized heterojunction morphology, leading to improved solar

Gao, Jinming

420

Discovering Pictorial Brand Associations from Large-Scale Online Image Data Disney Research Pittsburgh  

E-Print Network [OSTI]

Discovering Pictorial Brand Associations from Large-Scale Online Image Data Gunhee Kim Disney concepts associated with brands, and (ii) localizing the re- gions of brand in images. For experiments we collect about five millions of images of 48 brands crawled from five popu- lar online photo sharing sites

Xing, Eric P.

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


421

Recent advances in large scale image search Herve Jegou, Matthijs Douze, and Cordelia Schmid  

E-Print Network [OSTI]

Recent advances in large scale image search Herve Jegou, Matthijs Douze, and Cordelia Schmid INRIA search. State-of-the-art methods build on the bag-of-features image rep- resentation. We first analyze bag-of-features in the framework of approx- imate nearest neighbor search. This shows the sub

Paris-Sud XI, Université de

422

Microfluidic very large scale integration (mVLSI) with integrated micromechanical valves{  

E-Print Network [OSTI]

Microfluidic very large scale integration (mVLSI) with integrated micromechanical valves{ Ismail40258k Microfluidic chips with a high density of control elements are required to improve device and accessible high-density microfluidic chips, we have fabricated a monolithic PDMS valve architecture

Quake, Stephen R.

423

Asymptotically Optimal Transmission Policies for Large-Scale Low-Power Wireless Sensor Networks  

E-Print Network [OSTI]

Asymptotically Optimal Transmission Policies for Large-Scale Low-Power Wireless Sensor Networks. The objective is to devise joint routing, power control and transmission scheduling policies in order to gather formulate the problem as maximizing the utility of transmissions subject to explicit fairness constraints

Starobinski, David

424

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE-SCALE THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE- SCALE THERMAL ENERGY STORAGE Miroslaw storage performance. The expected immediate outcome of this effort is the demonstration of high-energy generation at high efficiency could revolutionize the development of solar energy. Nanoparticle-based phase

Pennycook, Steve

425

An Integrated Docking Pipeline for the Prediction of Large-Scale Protein-Protein Interactions  

E-Print Network [OSTI]

An Integrated Docking Pipeline for the Prediction of Large-Scale Protein-Protein Interactions Xin. In this study, we developed a protein-protein docking pipeline (PPDP) that integrates a variety of state studies. In this study, we developed a protein-protein docking pipeline by integrat

426

An analysis and validation pipeline for large-scale RNAi-based screens  

E-Print Network [OSTI]

An analysis and validation pipeline for large-scale RNAi-based screens Michael Plank1 , Guang Hu2 pipeline to prioritize these candidates incorporating effect sizes, functional enrichment analysis associated with oxidative stress resistance, as a proof-of-concept of our pipeline we demonstrate

de Magalhães, João Pedro

427

Energy Evaluation of PMCMTP for Large-Scale Wireless Sensor Networks  

E-Print Network [OSTI]

slots inside each Personal Area Network (PAN)), · Energy balancing and saving to prolong networkEnergy Evaluation of PMCMTP for Large-Scale Wireless Sensor Networks Jamila Ben Slimane, Ye-Qiong Song, Anis Koub^aa§¶ and Mounir Frikha Sup'Com-MEDIATRON, City of Communication Technologies, 2083

Paris-Sud XI, Université de

428

Large Scale Volume Rendering in Immersive Environments with Direct Manipulation Widgets  

E-Print Network [OSTI]

Large Scale Volume Rendering in Immersive Environments with Direct Manipulation Widgets Master's Thesis Proposal Joe Michael Kniss May 15, 2001 1 Introduction 1.1 Thesis Statement Parallel rendering exploration. 1.2 Motivation Direct volume rendering has proven to be an important visualization tool

Kniss, Joe Michael

429

Parallel Implementation of a Large-Scale 3-D Air Pollution Model  

E-Print Network [OSTI]

Parallel Implementation of a Large-Scale 3-D Air Pollution Model Tzvetan Ostromsky1 and Zahari-4000 Roskilde, Denmark, zz@dmu.dk; http://www.dmu.dk/AtmosphericEnvironment Abstract. Air pollution and analyzed. Keywords: air pollution model, system of PDE's, parallel algorithm, shared memory computer

Ostromsky, Tzvetan

430

Optimization and Large Scale Learning Optimization lies at the heart of almost every machine  

E-Print Network [OSTI]

Optimization and Large Scale Learning Optimization lies at the heart of almost every machine these facets requires optimization techniques tailored to not only respect them but to ag- gressively exploit by looking at the recent book [1] (MIT Press, 2011), or at the follow- ing workshops: (i) "Optimization

431

Categorised Ethical Guidelines for Large Scale Mobile HCI Donald McMillan  

E-Print Network [OSTI]

University of Glasgow, UK matthew.chalmers@glasgow.ac.uk ABSTRACT The recent rise in large scale trials of community con- sensus can leave researchers unsure as to how to run a study which meets their ethical in Greenfield's Everyware book [18]. High-level guidelines such as `do no harm' and `default to harmlessness

Chalmers, Matthew

432

The IR-resummed Effective Field Theory of Large Scale Structures  

E-Print Network [OSTI]

We present a new method to resum the effect of large scale motions in the Effective Field Theory of Large Scale Structures. Because the linear power spectrum in $\\Lambda$CDM is not scale free the effects of the large scale flows are enhanced. Although previous EFT calculations of the equal-time density power spectrum at one and two loops showed a remarkable agreement with numerical results, they also showed a 2% residual which appeared related to the BAO oscillations. We show that this was indeed the case, explain the physical origin and show how a Lagrangian based calculation removes this differences. We propose a simple method to upgrade existing Eulerian calculations to effectively make them Lagrangian and compare the new results with existing fits to numerical simulations. Our new two-loop results agrees with numerical results up to $k\\sim 0.6 h/$Mpc to within 1% with no oscillatory residuals. We also compute power spectra involving momentum which is significantly more affected by the large scale flows. We show how keeping track of these velocities significantly enhances the UV reach of the momentum power spectrum in addition to removing the BAO related residuals. We compute predictions for the real space correlation function around the BAO scale and investigate its sensitivity to the EFT parameters and the details of the resummation technique.

Leonardo Senatore; Matias Zaldarriaga

2014-04-23T23:59:59.000Z

433

Advanced modeling of large-scale oxy-fuel combustion processes  

E-Print Network [OSTI]

Advanced modeling of large-scale oxy-fuel combustion processes Chungen Yin Department of Energy Technology, Aalborg University, DK-9220 Aalborg, Denmark, chy@et.aau.dk Introduction Oxy-fuel combustion simulations of various oxy- fuel combustion processes and experimental validation. Result · A new weighted

Yin, Chungen

434

Fluid computation of the performanceenergy trade-off in large scale Markov models  

E-Print Network [OSTI]

total energy consumption should be chosen. H priority job SLA: 6.5s 90% L priority job SLA: 8s 80Fluid computation of the performance­energy trade-off in large scale Markov models Anton Stefanek to deal with is that of running costs such as energy consumption versus the availability and re- sponse

Imperial College, London

435

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

E-Print Network [OSTI]

installed in the building to reach the same goal. The purpose of the investigations presented here is to find energy-saving measures which economically fall between the retro-commissioning measures which typically have very short paybacks and the large scale...

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

436

FS2You: Peer-Assisted Semi-Persistent Online Storage at a Large Scale  

E-Print Network [OSTI]

Inc. Abstract--It has been widely acknowledged that online storage systems within the "cloud a group. Such online storage services are typically provided by dedicated servers, either in content as an extensive measurement study at a large scale to demonstrate the effectiveness of our design, using real

Wu, Dekai

437

Does the Budget Surplus Justify Large-Scale Tax Cuts?: Updates and Extensions  

E-Print Network [OSTI]

Does the Budget Surplus Justify Large-Scale Tax Cuts?: Updates and Extensions Alan J. Auerbach agreed should not be used for tax cuts. All of the remaining "on-budget" surplus was due to implausible of the on-budget surplus was due to accumulations in government trust funds for medicare and pensions, which

Sadoulet, Elisabeth

438

Page Digest for Large-Scale Web Services Daniel Rocco, David Buttler, Ling Liu  

E-Print Network [OSTI]

Page Digest for Large-Scale Web Services Daniel Rocco, David Buttler, Ling Liu Georgia Institute this storage and processing efficiently. In this paper, we introduce Page Digest, a mechanism for efficient storage and processing of Web documents. The Page Digest design encourages a clean separation

Rocco, Daniel

439

A TWO-STAGE APPROACH TO SOLVING LARGE-SCALE OPTIMAL POWER FLOWS  

E-Print Network [OSTI]

A TWO-STAGE APPROACH TO SOLVING LARGE-SCALE OPTIMAL POWER FLOWS *F e l i x F. Wu George Gross James problem is formulated as an unconstrained minimization problem using penalty functions and i s solved ] and Sasson and Merrill [ 3 ] . The s i z e and t h e extensive amount of computation involved i n solving t h

Gross, George

440

ON THE ROLE OF THE LARGE-SCALE MAGNETIC RECONNECTION IN THE CORONAL HEATING  

E-Print Network [OSTI]

emerging active region. We demonstrate that the effects of remote heating can be seen at significantON THE ROLE OF THE LARGE-SCALE MAGNETIC RECONNECTION IN THE CORONAL HEATING Alexei A. Pevtsov(1 changes in the magnetic connectivity, may play a role in coronal heating. To demonstrate the validity

Pevtsov, Alexei A.

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


441

Time series modeling and large scale global solar radiation forecasting from geostationary satellites data  

E-Print Network [OSTI]

1 Time series modeling and large scale global solar radiation forecasting from geostationary global solar radiation. In this paper, we use geostationary satellites data to generate 2-D time series of solar radiation for the next hour. The results presented in this paper relate to a particular territory

Paris-Sud XI, Université de

442

Sticky Traps for Large Scale House Fly (Diptera: Muscidae) Trapping in New York Poultry Facilities1  

E-Print Network [OSTI]

Sticky Traps for Large Scale House Fly (Diptera: Muscidae) Trapping in New York Poultry Facilities1 traps were evaluated under field conditions in two commercial high-rise, caged-layer poultry facilities-layerpoultry facilities. One side of each poultry facil- ity received traps with 1.2 m of exposed adhesive,whereas traps

Kaufman, Phillip E.

443

Large-Scale Patent Classification with Min-Max Modular Support Vector Machines  

E-Print Network [OSTI]

Large-Scale Patent Classification with Min-Max Modular Support Vector Machines Xiao-Lei Chu, Chao Ma, Jing Li, Bao-Liang Lu Senior Member, IEEE, Masao Utiyama, and Hitoshi Isahara Abstract-- Patent-world patent classification typically exceeds one million, and this number increases every year. An effective

Lu, Bao-Liang

444

Comparative Analysis of Balanced Winnow and SVM in Large Scale Patent Categorization  

E-Print Network [OSTI]

Comparative Analysis of Balanced Winnow and SVM in Large Scale Patent Categorization Katrien Beuls techniques, a collection of 1.2 million patent applications is used to build a classifier that is able). Contrary to SVM, Balanced Winnow is frequently applied in today's patent categorization systems. Results

Steels, Luc

445

ScriptGard: Automatic Context-Sensitive Sanitization for Large-Scale Legacy Web Applications  

E-Print Network [OSTI]

ScriptGard: Automatic Context-Sensitive Sanitization for Large-Scale Legacy Web Applications@microsoft.com ABSTRACT We empirically analyzed sanitizer use in a shipping web ap- plication with over 400,000 lines of code and over 23,244 methods, the largest empirical analysis of sanitizer use of which we are aware

Livshits, Ben

446

Invited Applications Paper Detecting Large-Scale System Problems by Mining Console Logs  

E-Print Network [OSTI]

. Researchers and operators have been using all kinds of mon- itoring data, from the simplest numerical metrics Problems by Mining Console Logs part operator, and charged with fixing the problem-- are usuallyInvited Applications Paper Detecting Large-Scale System Problems by Mining Console Logs Wei Xu xuw

Xu, Wei

447

Parameter identification in large-scale models for oil and gas production  

E-Print Network [OSTI]

Parameter identification in large-scale models for oil and gas production Jorn F.M. Van Doren: Models used for model-based (long-term) operations as monitoring, control and optimization of oil and gas information to the identification problem. These options are illustrated with examples taken from oil and gas

Van den Hof, Paul

448

STATISTICAL METHODS FOR RELATING TEMPERATURE EXTREMES TO LARGE-SCALE METEOROLOGICAL PATTERNS  

E-Print Network [OSTI]

1 STATISTICAL METHODS FOR RELATING TEMPERATURE EXTREMES TO LARGE-SCALE METEOROLOGICAL PATTERNS Rick Extreme Value Analysis: Block Maxima (3) Conditional Extreme Value Analysis: Peaks over Threshold (4) Application to California Temperature Extremes (5) Remaining Work #12;3 #12;4 #12;5 (1) Introduction

Katz, Richard

449

E-Print Network 3.0 - aero-elastic offshore wind Sample Search...  

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

6th Framework Programme Peter Hjuler Jensen, Ris National Laboratory, Summary: of wind turbines for future very large-scale applications, e.g. offshore wind farms of several...

450

Collegiate Wind Competition Turbines go Blade-to-Blade in Wind...  

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

This wind tunnel constructed by NREL engineers will test the small wind turbines designed by 10 university teams competing in DOE's Collegiate Wind Competition. This wind tunnel...

451

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

SciTech Connect (OSTI)

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

Laros, James H., III

2011-08-01T23:59:59.000Z

452

Testing the profitability of Anaerobic Digestion in a large-scale UK dairy farm   

E-Print Network [OSTI]

Anaerobic Digestion (AD) consists in the transformation of any organic non-woody material by micro-organisms into biogas. This biogas, composed of approximately 60 per cent methane can be further burnt and converted into electricity and heat. The UK...

Coz Leniz, Luis Fernando

2011-11-24T23:59:59.000Z

453

METHOD TO OBTAIN LARGE SCALE BURNING RATE OF LIQUIDS WITH LAB SCALE TESTS  

E-Print Network [OSTI]

facility (fire gallery). A non-dimensional number, the ratio of the heat of gasification to the heat of combustion, is also introduced and seems to show that the fuel classification proposed here always holds

Paris-Sud XI, Université de

454

A prediction of meander migration based on large-scale flume tests in clay  

E-Print Network [OSTI]

great ideas or useful hints for new research concerning the same type of problem. The past research works related to the prediction of meander migration were studied in order to have a better understanding of the existing techniques and an idea of a...

Park, Namgyu

2009-05-15T23:59:59.000Z

455

Commissioning test for existing large scale building using simulation modeling-APCBC  

E-Print Network [OSTI]

C - d e g Fan Frequency Perimeter Temp. Tsp of supply air Quantity of heating Heating Cooling Verification of the Improvement - 2 Inverter Control of the Fan Operation check of fan control, zero energy band 8@ Yoshibumi SUGIHARA/ Nikken Sekkei... ?? ?? ?? ??? ????? HST C F ??????? 15.5 ?????????? 38.38 ??????????????????? 35.92 ????????????? 0.0080 1AHU????????? m3/h 1,650 ???????????????kg/s 0.000003 ?????????? W 0 -477 -1,436 -477 0 0 0 0 0 0 - - - 1 7.97 7.97 7.97 7.97 7.97 8.19 8.19 0...

Sugihara,Y; Hondo,Y.; Yuzawa,H.

2014-01-01T23:59:59.000Z

456

The Hierarchical Rater Model for Rated Test Items and its Application to Large-Scale Educational  

E-Print Network [OSTI]

items have become a standard part of the educational assessment landscape. Some achieve- ment targets

Junker, Brian

457

LARGE SCALE DIRECT SHEAR TESTING WITH TIRE BALES By: Christopher J. LaRocque1  

E-Print Network [OSTI]

2 , Advisor Abstract: There are growing environmental interests in the utilization of recycled tire for newly constructed roads. Tire bales are manufactured by compressing approximately 100 waste auto, The University of Texas at Austin #12;Materials and Methods: Figure 2 shows a tire bale similar to those being

Zornberg, Jorge G.

458

OBSERVATIONAL TEST OF STOCHASTIC HEATING IN LOW-{beta} FAST-SOLAR-WIND STREAMS  

SciTech Connect (OSTI)

Spacecraft measurements show that protons undergo substantial perpendicular heating during their transit from the Sun to the outer heliosphere. In this paper, we use Helios 2 measurements to investigate whether stochastic heating by low-frequency turbulence is capable of explaining this perpendicular heating. We analyze Helios 2 magnetic field measurements in low-{beta} fast-solar-wind streams between heliocentric distances r = 0.29 AU and r = 0.64 AU to determine the rms amplitude of the fluctuating magnetic field, {delta}B{sub p}, near the proton gyroradius scale {rho}{sub p}. We then evaluate the stochastic heating rate Q{sub stoch} using the measured value of {delta}B{sub p} and a previously published analytical formula for Q{sub stoch}. Using Helios measurements we estimate the ''empirical'' perpendicular heating rate Q{sub Up-Tack emp} = (k{sub B}/m{sub p}) BV (d/dr) (T{sub Up-Tack p}/B) that is needed to explain the T{sub p} profile. We find that Q{sub stoch} {approx} Q{sub emp}, but only if a key dimensionless constant appearing in the formula for Q{sub stoch} lies within a certain range of values. This range is approximately the same throughout the radial interval that we analyze and is consistent with the results of numerical simulations of the stochastic heating of test particles in reduced magnetohydrodynamic turbulence. These results support the hypothesis that stochastic heating accounts for much of the perpendicular proton heating occurring in low-{beta} fast-wind streams.

Bourouaine, Sofiane; Chandran, Benjamin D. G., E-mail: s.bourouaine@unh.edu [Space Science Center and Department of Physics, University of New Hampshire, Durham, NH 03824 (United States)

2013-09-10T23:59:59.000Z

459

The optical depth of the Universe to ultrahigh energy cosmic ray scattering in the magnetized large scale structure  

E-Print Network [OSTI]

This paper provides an analytical description of the transport of ultrahigh energy cosmic rays in an inhomogeneously magnetized intergalactic medium. This latter is modeled as a collection of magnetized scattering centers such as radio cocoons, magnetized galactic winds, clusters or magnetized filaments of large scale structure, with negligible magnetic fields in between. Magnetic deflection is no longer a continuous process, it is rather dominated by scattering events. We study the interaction between high energy cosmic rays and the scattering agents. We then compute the optical depth of the Universe to cosmic ray scattering and discuss the phenomological consequences for various source scenarios. For typical parameters of the scattering centers, the optical depth is greater than unity at 5x10^{19}eV, but the total angular deflection is smaller than unity. One important consequence of this scenario is the possibility that the last scattering center encountered by a cosmic ray be mistaken with the source of this cosmic ray. In particular, we suggest that part of the correlation recently reported by the Pierre Auger Observatory may be affected by such delusion: this experiment may be observing in part the last scattering surface of ultrahigh energy cosmic rays rather than their source population. Since the optical depth falls rapidly with increasing energy, one should probe the arrival directions of the highest energy events beyond 10^{20}eV on an event by event basis to circumvent this effect.

Kumiko Kotera; Martin Lemoine

2008-04-30T23:59:59.000Z

460

Creation of the dam for the No. 2 Kambaratinskaya HPP by large-scale blasting: analysis of planning experience and lessons learned  

SciTech Connect (OSTI)

Results of complex instrument observations and video taping during large-scale blasts detonated for creation of the dam at the No. 2 Kambaratinskaya HPP on the Naryn River in the Kyrgyz Republic are analyzed. Tests of the energy effectiveness of the explosives are evaluated, characteristics of LSB manifestations in seismic and air waves are revealed, and the shaping and movement of the rock mass are examined. A methodological analysis of the planning and production of the LSB is given.

Shuifer, M. I.; Argal, E. S. [JSC 'Gidrospetsproekt' (Russian Federation)

2012-05-15T23:59:59.000Z

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


461

Solar Power in the Desert: Are the current large-scale solar developments really improving California’s environment?  

E-Print Network [OSTI]

large scale solar developments in California will impactpoorly placed solar arrays in California leads to the losslarge-scale solar developments really improving California’s

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

462

Sault Tribe Wind Energy Feasibility Study  

SciTech Connect (OSTI)

The Sault Tribe conducted a feasibility study on tribal lands in the Upper Peninsula of Michigan to determine the technical and economic feasibility of both small and large-scale wind power development on tribal lands. The study included a wind resource assessment, transmission system analysis, engineering and regulatory analyzes and assessments.

Toni Osterhout; Global Energy Concepts

2005-07-31T23:59:59.000Z

463

Physical control oriented model of large scale refrigerators to synthesize advanced control schemes. Design, validation, and first control results  

SciTech Connect (OSTI)

In this paper, a physical method to obtain control-oriented dynamical models of large scale cryogenic refrigerators is proposed, in order to synthesize model-based advanced control schemes. These schemes aim to replace classical user experience designed approaches usually based on many independent PI controllers. This is particularly useful in the case where cryoplants are submitted to large pulsed thermal loads, expected to take place in the cryogenic cooling systems of future fusion reactors such as the International Thermonuclear Experimental Reactor (ITER) or the Japan Torus-60 Super Advanced Fusion Experiment (JT-60SA). Advanced control schemes lead to a better perturbation immunity and rejection, to offer a safer utilization of cryoplants. The paper gives details on how basic components used in the field of large scale helium refrigeration (especially those present on the 400W @1.8K helium test facility at CEA-Grenoble) are modeled and assembled to obtain the complete dynamic description of controllable subsystems of the refrigerator (controllable subsystems are namely the Joule-Thompson Cycle, the Brayton Cycle, the Liquid Nitrogen Precooling Unit and the Warm Compression Station). The complete 400W @1.8K (in the 400W @4.4K configuration) helium test facility model is then validated against experimental data and the optimal control of both the Joule-Thompson valve and the turbine valve is proposed, to stabilize the plant under highly variable thermals loads. This work is partially supported through the European Fusion Development Agreement (EFDA) Goal Oriented Training Program, task agreement WP10-GOT-GIRO.

Bonne, François; Bonnay, Patrick [INAC, SBT, UMR-E 9004 CEA/UJF-Grenoble, 17 rue des Martyrs, 38054 Grenoble (France); Alamir, Mazen [Gipsa-Lab, Control Systems Department, CNRS-University of Grenoble, 11, rue des Mathématiques, BP 46, 38402 Saint Martin d'Hères (France)

2014-01-29T23:59:59.000Z

464

Large-scale Ocean-based or Geothermal Power Plants by Thermoelectric Effects  

E-Print Network [OSTI]

Heat resources of small temperature difference are easily accessible, free and unlimited on earth. Thermoelectric effects provide the technology for converting these heat resources directly into electricity. We present designs of electricity generators based on thermoelectric effects and using heat resources of small temperature difference, e.g., ocean water at different depths and geothermal sources, and conclude that large-scale power plants based on thermoelectric effects are feasible and economically competitive. The key observation is that the power factor of thermoelectric materials, unlike the figure of merit, can be improved by orders of magnitude upon laminating good conductors and good thermoelectric materials. The predicted large-scale power plants based on thermoelectric effects, if validated, will have a global economic and social impact for its scalability, and the renewability, free and unlimited supply of heat resources of small temperature difference on earth.

Liu, Liping

2012-01-01T23:59:59.000Z

465

A PRACTICAL ONTOLOGY FOR THE LARGE-SCALE MODELING OF SCHOLARLY ARTIFACTS AND THEIR USAGE  

SciTech Connect (OSTI)

The large-scale analysis of scholarly artifact usage is constrained primarily by current practices in usage data archiving, privacy issues concerned with the dissemination of usage data, and the lack of a practical ontology for modeling the usage domain. As a remedy to the third constraint, this article presents a scholarly ontology that was engineered to represent those classes for which large-scale bibliographic and usage data exists, supports usage research, and whose instantiation is scalable to the order of 50 million articles along with their associated artifacts (e.g. authors and journals) and an accompanying 1 billion usage events. The real world instantiation of the presented abstract ontology is a semantic network model of the scholarly community which lends the scholarly process to statistical analysis and computational support. They present the ontology, discuss its instantiation, and provide some example inference rules for calculating various scholarly artifact metrics.

RODRIGUEZ, MARKO A. [Los Alamos National Laboratory; BOLLEN, JOHAN [Los Alamos National Laboratory; VAN DE SOMPEL, HERBERT [Los Alamos National Laboratory

2007-01-30T23:59:59.000Z

466

Optimization of large-scale heterogeneous system-of-systems models.  

SciTech Connect (OSTI)

Decision makers increasingly rely on large-scale computational models to simulate and analyze complex man-made systems. For example, computational models of national infrastructures are being used to inform government policy, assess economic and national security risks, evaluate infrastructure interdependencies, and plan for the growth and evolution of infrastructure capabilities. A major challenge for decision makers is the analysis of national-scale models that are composed of interacting systems: effective integration of system models is difficult, there are many parameters to analyze in these systems, and fundamental modeling uncertainties complicate analysis. This project is developing optimization methods to effectively represent and analyze large-scale heterogeneous system of systems (HSoS) models, which have emerged as a promising approach for describing such complex man-made systems. These optimization methods enable decision makers to predict future system behavior, manage system risk, assess tradeoffs between system criteria, and identify critical modeling uncertainties.

Parekh, Ojas; Watson, Jean-Paul; Phillips, Cynthia Ann; Siirola, John; Swiler, Laura Painton; Hough, Patricia Diane (Sandia National Laboratories, Livermore, CA); Lee, Herbert K. H. (University of California, Santa Cruz, Santa Cruz, CA); Hart, William Eugene; Gray, Genetha Anne (Sandia National Laboratories, Livermore, CA); Woodruff, David L. (University of California, Davis, Davis, CA)

2012-01-01T23:59:59.000Z

467

Active Power Control Testing at the U.S. National Wind Technology Center (NWTC) (Presentation)  

SciTech Connect (OSTI)

In order to keep the electricity grid stable and the lights on, the power system relies on certain responses from its generating fleet. This presentation evaluates the potential for wind turbines and wind power plants to provide these services and assist the grid during critical times.

Ela, E.

2011-01-01T23:59:59.000Z

468

A ranking and exploration service based on large-scale usage data  

SciTech Connect (OSTI)

This poster presents the architecture and user interface of a prototype service that was designed to allow end-users to explore the s tructure of science and perform assessments of scholarly impact on the basis of large-scale usage data. The underlying usage data set was constructed by the NIESUR project which collected 1 billion usage events from a wide range of publishers, aggregators and institutional consortia.

Bollen, Johan [Los Alamos National Laboratory; Van De Sompel, Herbert L [Los Alamos National Laboratory; Balakireva, Lyudmila L [Los Alamos National Laboratory; Chute, Ryan M [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

469

A Climatology of Tropical Anvil and Its Relationship to the Large-Scale Circulation  

E-Print Network [OSTI]

This research was sponsored by the ARM-DOE Grant DE-FG02-06ER64174. viii TABLE OF CONTENTS Page ABSTRACT??????.???????????????????..??? iii DEDICATION... the climate feedback obtained from doubled CO 2 experiments with different parameterizations of large-scale clouds and moist convection by using the Goddard Institute for Space Studies (GISS) GCM. They showed that the presence of optically thick anvil...

Li, Wei

2011-02-22T23:59:59.000Z

470

Final Report: Large-Scale Optimization for Bayesian Inference in Complex Systems  

SciTech Connect (OSTI)

The SAGUARO (Scalable Algorithms for Groundwater Uncertainty Analysis and Robust Optimiza- tion) Project focuses on the development of scalable numerical algorithms for large-scale Bayesian inversion in complex systems that capitalize on advances in large-scale simulation-based optimiza- tion and inversion methods. Our research is directed in three complementary areas: efficient approximations of the Hessian operator, reductions in complexity of forward simulations via stochastic spectral approximations and model reduction, and employing large-scale optimization concepts to accelerate sampling. Our efforts are integrated in the context of a challenging testbed problem that considers subsurface reacting flow and transport. The MIT component of the SAGUARO Project addresses the intractability of conventional sampling methods for large-scale statistical inverse problems by devising reduced-order models that are faithful to the full-order model over a wide range of parameter values; sampling then employs the reduced model rather than the full model, resulting in very large computational savings. Results indicate little effect on the computed posterior distribution. On the other hand, in the Texas-Georgia Tech component of the project, we retain the full-order model, but exploit inverse problem structure (adjoint-based gradients and partial Hessian information of the parameter-to- observation map) to implicitly extract lower dimensional information on the posterior distribution; this greatly speeds up sampling methods, so that fewer sampling points are needed. We can think of these two approaches as "reduce then sample" and "sample then reduce." In fact, these two approaches are complementary, and can be used in conjunction with each other. Moreover, they both exploit deterministic inverse problem structure, in the form of adjoint-based gradient and Hessian information of the underlying parameter-to-observation map, to achieve their speedups.

Ghattas, Omar [The University of Texas at Austin] [The University of Texas at Austin

2013-10-15T23:59:59.000Z

471

The Future of the Local Large Scale Structure: the roles of Dark Matter and Dark Energy  

E-Print Network [OSTI]

We study the distinct effects of Dark Matter and Dark Energy on the future evolution of nearby large scale structures using constrained N-body simulations. We contrast a model of Cold Dark Matter and a Cosmological Constant (LCDM) with an Open CDM (OCDM) model with the same matter density Omega_m =0.3 and the same Hubble constant h=0.7. Already by the time the scale factor increased by a factor of 6 (29 Gyr from now in LCDM; 78 Gyr from now in OCDM) the comoving position of the Local Group is frozen. Well before that epoch the two most massive members of the Local Group, the Milky Way and Andromeda, will merge. However, as the expansion rates of the scale factor in the two models are different, the Local Group will be receding in physical coordinates from Virgo exponentially in a LCDM model and at a roughly constant velocity in an OCDM model. More generally, in comoving coordinates the future large scale structure will look like a sharpened image of the present structure: the skeleton of the cosmic web will remain the same, but clusters will be more `isolated' and the filaments will become thinner. This implies that the long-term fate of large scale structure as seen in comoving coordinates is determined primarily by the matter density. We conclude that although the LCDM model is accelerating at present due to its Dark Energy component while the OCDM model is non accelerating, their large scale structure in the future will look very similar in comoving coordinates.

Yehuda Hoffman; Ofer Lahav; Gustavo Yepes; Yaniv Dover

2007-10-10T23:59:59.000Z

472

Studying large-scale structure with the 2dF Galaxy Redshift Survey  

E-Print Network [OSTI]

The 2dF Galaxy Redshift Survey is the first to observe more than 100,000 redshifts. This allows precise measurements of many of the key statistics of galaxy clustering, in particular redshift-space distortions and the large-scale power spectrum. This paper presents the current 2dFGRS results in these areas. Redshift-space distortions are detected with a high degree of significance, confirming the detailed Kaiser distortion from large-scale infall velocities, and measuring the distortion parameter beta equiv Omega_m^{0.6}/b = 0.43 +- 0.07. The power spectrum is measured to 0.02 h Mpc^{-1}, and is well fitted by a CDM model with Omega_m h = 0.20 +- 0.03 and a baryon fraction of 0.15 +- 0.07. A joint analysis with CMB data requires Omega_m = 0.29 +- 0.05, assuming scalar fluctuations, but no priors on other parameters. Two methods are used to determine the large-scale bias parameter: an internal bispectrum analysis yields b = 1.04 +- 0.11, in very good agreement with the b = 1.10 +- 0.08 obtained from a joint 2dFGRS+CMB analysis, again assuming scalar fluctuations. These figures refer to galaxies of approximate luminosity 2L^*; luminosity dependence of clustering is detected at high significance, and is well described by b/b^* = 0.85 + 0.15(L/L^*).

J. A. Peacock; M. Colless; I. Baldry; C. Baugh; J. Bland-Hawthorn; T. J. Bridges; R. Cannon; S. Cole; C. A. Collins; W. Couch; G. B. Dalton; R. De Propris; S. P. Driver; G. Efstathiou; R. S. Ellis; C. S. Frenk; K. Glazebrook; C. A. Jackson; O. Lahav; I. J. Lewis; S. Lumsden; S. J. Maddox; D. Madgwick; P. Norberg; W. Percival; B. A. Peterson; W. J. Sutherland; K. Taylor

2002-05-28T23:59:59.000Z

473

Economic modeling of intermittency in wind power generation  

E-Print Network [OSTI]

The electricity sector is a major source of carbon dioxide emissions that contribute to global climate change. Over the past decade wind energy has steadily emerged as a potential source for large-scale, low carbon energy. ...

Cheng, Alan Yung Chen

2005-01-01T23:59:59.000Z

474

Operating Reserves and Wind Power Integration: An International Comparison; Preprint  

SciTech Connect (OSTI)

This paper provides a high-level international comparison of methods and key results from both operating practice and integration analysis, based on an informal International Energy Agency Task 25: Large-scale Wind Integration.

Milligan, M.; Donohoo, P.; Lew, D.; Ela, E.; Kirby, B.; Holttinen, H.; Lannoye, E.; Flynn, D.; O'Malley, M.; Miller, N.; Eriksen, P. B.; Gottig, A.; Rawn, B.; Gibescu, M.; Lazaro, E. G.; Robitaille, A.; Kamwa, I.

2010-10-01T23:59:59.000Z

475

The role of coarse woody debris in southeastern pine forests; preliminary results from a large-scale experiment.  

SciTech Connect (OSTI)

McCay, Timothy S., James L. Hanula, Susan C. Loeb, Steven M. Lohr, James W. McMinn, and Bret D. Wright-Miley. 2002. The role of coarse woody debris in southeastern pine forests; preliminary results from a large-scale experiment. 135-144. In: Proceedings of the symposium on the ecology and management of dead wood in western forests. 1999 November 2-4; Reno, NV. Gen. Tech. Rep. PSW-GTR-181. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture 949 p. ABSTRACT: We initiated a long-term experiment involving manipulation of coarse woody debris (CWD) at the Savannah River National Environmental Research Park in the upper Coastal Plain of South Carolina. Each of four 9.3-ha plots in each of four blocks was subject to one of the following treatments: removal of all snags and fallen logs, removal of fallen logs only, felling and girdling to simulate a catastrophic pulse of CWD, and control. Removal treatments were applied in 1996, and the felling or snag-creation treatment will be applied in 2000-2001. Monitoring of invertebrate, herptile, avian, and mammalian assemblages and CWD dynamics began immediately after CWD removal and continues through the present. Removal treatments resulted in a fivefold to tenfold reduction in CWD abundance. To date, significant differences among treatments have only been detected for a few animal taxa. However, preliminary results underscore the benefits of large-scale experiments. This experiment allowed unambiguous tests of hypotheses regarding the effect of CWD abundance on fauna. Coupled with studies of habitat use and trophic interactions, the experimental approach may result in stronger inferences regarding the function of CWD than results obtained through natural history observation or uncontrolled correlative studies.

McCay Timothy, S.; Hanula, James, L.; Loeb, Susan, C.; Lohr, Steven, M.; McMinn, James, W.; Wright-Miley. Bret, D.

2002-08-01T23:59:59.000Z

476

Electronic copy available at: http://ssrn.com/abstract=2014754 Joshua M. Pearce, "Industrial Symbiosis for Very Large Scale Photovoltaic  

E-Print Network [OSTI]

Symbiosis for Very Large Scale Photovoltaic Manufacturing", Renewable Energy 33, pp. 11011108, 2008. http://dx.doi.org/10.1016/j.renene.2007.07.002 Industrial Symbiosis of Very Large Scale Photovoltaic Manufacturing. Solar photovoltaic (PV) cells offer a technically sustainable solution to the projected enormous future

Paris-Sud XI, Université de

477

Forest landscape models, a tool for understanding the effect of the large-scale and long-term landscape processes  

E-Print Network [OSTI]

Editorial Forest landscape models, a tool for understanding the effect of the large-scale and long-term landscape processes Forest landscape models have become important tools for understanding large-scale and long-term landscape (spatial) processes such as climate change, fire, windthrow, seed dispersal, insect

He, Hong S.

478

Wind Energy Program: Top 10 Program Accomplishments  

Broader source: Energy.gov [DOE]

Brochure on the top accomplishments of the Wind Energy Program, including the development of large wind machines, small machines for the residential market, wind tunnel testing, computer codes for modeling wind systems, high definition wind maps, and successful collaborations.

479

Wind Tunnel and Flight Testing of Active Flow Control on a UAV  

E-Print Network [OSTI]

Active flow control has been extensively explored in wind tunnel studies but successful in-flight implementation of an active flow control technology still remains a challenge. This thesis presents implementation of active flow control technology...

Babbar, Yogesh

2011-08-08T23:59:59.000Z

480

An Updated Procedure for Tare and Interference Wind Tunnel Testing of Strut-Mounted Models  

E-Print Network [OSTI]

to the presence of wind tunnel walls. The standard correction procedure adjusts for the presence of these boundaries using approximations based on linear potential flow theory. Separately,tare and interference removal involves the linear subtraction of mounting...

Kutz, Douglas M

2014-05-02T23:59:59.000Z

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481

Combining Droop Curve Concepts with Control Systems for Wind Turbine Active Power Control: Preprint  

SciTech Connect (OSTI)

Wind energy is becoming a larger portion of the global energy portfolio and wind penetration has increased dramatically in certain regions of the world. This increasing wind penetration has driven the need for wind turbines to provide active power control (APC) services to the local utility grid, as wind turbines do not intrinsically provide frequency regulation services that are common with traditional generators. It is common for large scale wind turbines to be decoupled from the utility grid via power electronics, which allows the turbine to synthesize APC commands via control of the generator torque and blade pitch commands. Consequently, the APC services provided by a wind turbine can be more flexible than those provided by conventional generators. This paper focuses on the development and implementation of both static and dynamic droop curves to measure grid frequency and output delta power reference signals to a novel power set point tracking control system. The combined droop curve and power tracking controller is simulated and comparisons are made between simulations using various droop curve parameters and stochastic wind conditions. The tradeoffs involved with aggressive response to frequency events are analyzed. At the turbine level, simulations are performed to analyze induced structural loads. At the grid level, simulations test a wind plant's response to a dip in grid frequency.

Buckspan, A.; Aho, J.; Pao, L.; Fleming, P.; Jeong, Y.

2012-06-01T23:59:59.000Z

482

Large-Scale Parallel Finite Element Analysis of the Stress Singular Problems  

SciTech Connect (OSTI)

In this paper, the convergence behavior of large-scale parallel finite element method for the stress singular problems was investigated. The convergence behavior of iterative solvers depends on the efficiency of the pre-conditioners. However, efficiency of pre-conditioners may be influenced by the domain decomposition that is necessary for parallel FEM. In this study the following results were obtained: Conjugate gradient method without preconditioning and the diagonal scaling preconditioned conjugate gradient method were not influenced by the domain decomposition as expected. symmetric successive over relaxation method preconditioned conjugate gradient method converged 6% faster as maximum if the stress singular area was contained in one sub-domain. (authors)

Noriyuki Kushida; Hiroshi Okuda; Genki Yagawa [University of Tokyo (Japan)

2002-07-01T23:59:59.000Z

483

Materials Science and Materials Chemistry for Large Scale Electrochemical Energy Storage: From Transportation to Electrical Grid  

SciTech Connect (OSTI)

Large-scale electrical energy storage has become more important than ever for reducing fossil energy consumption in transportation and for the widespread deployment of intermittent renewable energy in electric grid. However, significant challenges exist for its applications. Here, the status and challenges are reviewed from the perspective of materials science and materials chemistry in electrochemical energy storage technologies, such as Li-ion batteries, sodium (sulfur and metal halide) batteries, Pb-acid battery, redox flow batteries, and supercapacitors. Perspectives and approaches are introduced for emerging battery designs and new chemistry combinations to reduce the cost of energy storage devices.

Liu, Jun; Zhang, Jiguang; Yang, Zhenguo; Lemmon, John P.; Imhoff, Carl H.; Graff, Gordon L.; Li, Liyu; Hu, Jian Z.; Wang, Chong M.; Xiao, Jie; Xia, Guanguang; Viswanathan, Vilayanur V.; Baskaran, Suresh; Sprenkle, Vincent L.; Li, Xiaolin; Shao, Yuyan; Schwenzer, Birgit

2013-02-15T23:59:59.000Z

484

Large-Scale Structure Formation in the Quasi-linear Regime  

E-Print Network [OSTI]

The understanding of the large-scale structure formation requires the resolution of coupled nonlinear equations describing the cosmic density and velocity fields. This is a complicated problem that, for the last decade, has been essentially addressed with N-body simulations. There is however a regime, the so-called quasi-linear regime, for which the relative density fluctuations are on average below unity. It is then possible to apply Perturbation Theory techniques where the perturbation expansions are made with respect to the initial fluctuations. I review here the major results that have been obtained in this regime.

F. Bernardeau

1996-07-02T23:59:59.000Z

485

A model for red blood cells in simulations of large-scale blood flows  

E-Print Network [OSTI]

Red blood cells (RBCs) are an essential component of blood. A method to include the particulate nature of blood is introduced here with the goal of studying circulation in large-scale realistic vessels. The method uses a combination of the Lattice Boltzmann method (LBM) to account for the plasma motion, and a modified Molecular Dynamics scheme for the cellular motion. Numerical results illustrate the quality of the model in reproducing known rheological properties of blood as much as revealing the effect of RBC structuring on the wall shear stress, with consequences on the development of cardiovascular diseases.

Simone Melchionna

2011-07-25T23:59:59.000Z

486

Femtosecond laser-induced asymmetric large scale waves on gold surfaces  

SciTech Connect (OSTI)

With femtosecond (fs) pulse irradiation, we investigate the morphological evolution of a unique type of fs laser-induced periodic surface structure, called nanostructure-covered large scale waves (NC-LSWs), covered by iterating stripe patterns of nanostructures and microstructures with a period of tens of microns. By monitoring the morphological profile of NC-LSWs following fs laser heating of Au, we show that the NC-LSWs are highly asymmetrically formed and propagate on a gold surface. We believe that the selective laser ablation of Au surface and the subsequent mass transfer of liquid Au following nonuniform energy deposition result in the asymmetric NC-LSW propagation on metals.

Yong Hwang, Taek; Guo, Chunlei [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

2012-07-09T23:59:59.000Z

487

The Feasibility of Building Large Scale Optical Switches Using a Novel MZI-SOA Hybrid Approach  

E-Print Network [OSTI]

presents a schematic of the loop control plane. The switch is mounted on a thermo-electric cooler and operates at 20ºC. Lensed fibres are used to couple light in and out the chip, with a coupling loss of 8dB. A central scheduler (Stanford Research Systems... The Feasibility of Building Large Scale Optical Switches Using a Novel MZI-SOA Hybrid Approach Q. Cheng, J. L. Wei, A. Wonfor, R.V. Penty and I.H. White Centre for Photonic Systems, Electrical Division, Department of Engineering, University...

Cheng, Q.; Wei, J. L.; Wonfor, A.; Penty, R. V.; White, I. H.

2014-01-01T23:59:59.000Z

488

THE APM CLUSTER SURVEY: CLUSTER DETECTION AND LARGE-SCALE STRUCTURE  

E-Print Network [OSTI]

The APM Cluster Survey was based on a modification of Abell's original classification scheme for galaxy clusters. Here we discuss the results of an investigation of the stability of the statistical properties of the cluster catalogue to changes in the selection parameters. For a poor choice of selection parameters we find clear indications of line-of-sight clusters, but there is a wide range of input parameters for which the statistical properties of the catalogue are stable. We conclude that clusters selected in this way are indeed useful as tracers of large-scale structure.

G. B. Dalton

1995-05-17T23:59:59.000Z

489

Large-Scale Production of Marine Microalgae for Fuel and Feeds  

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 on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10 DOEWashington,LM-04-XXXX OfficeLandLarge-Scale Manufacturing

490

An integrated approach to offshore wind energy assessment: Great Lakes 3D Wind Experiment. Part I. Calibration and testing RJ Barthelmie1, SC Pryor1, CM Smith1, P Crippa1, H Wang1, R. Krishnamurthy2, R. Calhoun2, D Valyou3, P Marzocca3, D Matthiesen4, N.  

E-Print Network [OSTI]

An integrated approach to offshore wind energy assessment: Great Lakes 3D Wind Experiment. Part I Government or any agency thereof." Introduction An experiment to test wind and turbulence measurement strategies was conducted at a northern Indiana wind farm in May 2012. The experimental design focused

Polly, David

491

Offshore Wind Power: Science, engineering, and policy MAST 628-010, Fall 2008  

E-Print Network [OSTI]

Offshore Wind Power: Science, engineering, and policy MAST 628-010, Fall 2008 Revised 10 October@udel.edu Class web site with lecture notes: www.udel.edu/sakai UD offshore wind research: http, plan, regulate, and develop offshore wind resources for large-scale power production. Offshore wind

Firestone, Jeremy

492

Reactive power control of grid-connected wind farm based on adaptive dynamic programming  

E-Print Network [OSTI]

is widely used in the wind power system for its advantages over other two types [5]. The characteristicsReactive power control of grid-connected wind farm based on adaptive dynamic programming Yufei Tang Wind farm Power system Adaptive control a b s t r a c t Optimal control of large-scale wind farm has

He, Haibo

493

Ris-R-1000(EN) Cost Optimization of Wind Turbines for  

E-Print Network [OSTI]

Risø-R-1000(EN) Cost Optimization of Wind Turbines for Large-scale Off-shore Wind Farms Peter contains a preliminary investigation of site specific design of off- shore wind turbines for a large off using a design tool for wind turbines that involve numerical optimization and aeroelastic calculations

494

Final Technical Report: Supporting Wind Turbine Research and Testing - Gearbox Durability Study  

SciTech Connect (OSTI)

The combination of premature failure of wind turbine gearboxes and the downtime caused by those failures leads to an increase in the cost of electricity produced by the wind. There is a need for guidance to asset managers regarding how to maximize the longevity of their gearboxes in order to help keep the cost of wind energy as low as possible. A low cost of energy supports the US Department of Energy's goal of achieving 20% of the electricity in the United States produced by wind by the year 2030. DNV KEMA has leveraged our unique position in the industry as an independent third party engineering organization to study the problem of gearbox health management and develop guidance to project operators. This report describes the study. The study was conducted in four tasks. In Task 1, data that may be related to gearbox health and are normally available to wind project operators were collected for analysis. Task 2 took a more in-depth look at a small number of gearboxes to gain insight in to relevant failure modes. Task 3 brought together the previous tasks by evaluating the available data in an effort to identify data that could provide early indications of impending gearbox failure. Last, the observations from the work were collected to develop recommendations regarding gearbox health management.

Matthew Malkin

2012-04-30T23:59:59.000Z

495

Fuels generated from renewable energy: a possible solution for large scale energy storage  

E-Print Network [OSTI]

(CSP)Concentrating solar power (CSP) Light electricity Photovoltaic conversion (PV) #12;4/22/2012 4 Energy System Gas (or fossil) Plant Sun or Wind Energy Plant Sun Fossil Wind Water Liquid fuels or raw #12;4/22/2012 9 Electricity grid Indirect Towards the Renewable Energy System Gas (or fossil) Plant

Franssen, Michael

496

Large-scale 700 hPa Height Patterns Associated with Cyclone Passage and Strong Winds on Lake Erie  

E-Print Network [OSTI]

University of Michigan Ann Arbor, Michigan 48109 ABSTRACT. The difference in 700 hPa height patterns Commonwealth Blvd. Ann Arbor, Michigan 48105 2Cooperative Institute for Limnology and Ecosystems Research biological effects (Lam and Schertzer 1987). They can also affect the formation and transport of ice. Hence

497

Wind and Structures, Vol. 10, No. 4 (2007) 315-346 315 Proposed large-scale modelling of the  

E-Print Network [OSTI]

with optical radiation (Doviak and Zrni 1988). Doppler radar has that impacts on the ground and spreads outwards, often leaving a starburst damage imprint (Fujita 1985). Early within mesoscale convection systems, such as bow echoes and derechos, can leave a costly swath of damage

Savory, Eric

498

Large-Scale Offshore Wind Power in the United States: Assessment of Opportunities and Barriers, NREL (National Renewable Energy Laboratory)  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6, 2011 CERN 73-11Large areaLargefor HighDepartment

499

Connecting the Physical Properties of Galaxies with the Overdensity and Tidal Shear of the Large-Scale Environment  

E-Print Network [OSTI]

We have examined the correlations between the large-scale environment of galaxies and their physical properties, using a sample of 28,354 nearby galaxies drawn from the Sloan Digital Sky Survey, and the large-scale tidal field reconstructed in real space from the 2Mass Redshift Survey and smoothed over a radius of $\\sim 6 h^{-1}$Mpc. The large-scale environment is expressed in terms of the overdensity, the ellipticity of the shear and the type of the large-scale structure. The physical properties analyzed include $r$-band absolute magnitude $M_{^{0.1}r}$, stellar mass $M_\\ast$, $g-r$ colour, concentration parameter $R_{90}/R_{50}$ and surface stellar mass density $\\mu_\\ast$. Both luminosity and stellar mass are found to be statistically linked to the large-scale environment, regardless of how the environment is quantified. More luminous (massive) galaxies reside preferentially in the regions with higher densities, lower ellipticities and halo-like structures. At fixed luminosity, the large-scale overdensity depends strongly on parameters related to the recent star formation history, that is colour and D(4000), but is almost independent of the structural parameters $R_{90}/R_{50}$ and $\\mu_\\ast$. All the physical properties are statistically linked to the shear of the large-scale environment even when the large-scale density is constrained to a narrow range. This statistical link has been found to be most significant in the quasi-linear regions where the large-scale density approximates to an order of unity, but no longer significant in highly nonlinear regimes with $\\delta_{\\rm LS}\\gg 1$.

Jounghun Lee; Cheng Li

2008-03-12T23:59:59.000Z

500

Large Scale Ice Water Path and 3-D Ice Water Content  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the radar/lidar/radiometer observations at the ARM site are single-point measurement, therefore, do not provide horizontal distribution of condensed water. The intention of this product is to provide large-scale distribution of cloud ice water by merging available surface and satellite measurements. The satellite cloud ice water algorithm uses ARM ground-based measurements as baseline, produces datasets for 3-D cloud ice water distributions in a 10 deg x 10 deg area near ARM site. The approach of the study is to expand a (surface) point measurement to an (satellite) areal measurement. That is, this study takes the advantage of the high quality cloud measurements at the point of ARM site. We use the cloud characteristics derived from the point measurement to guide/constrain satellite retrieval, then use the satellite algorithm to derive the cloud ice water distributions within an area, i.e., 10 deg x 10 deg centered at ARM site.

Liu, Guosheng