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1

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

2

Large-Scale Wind Training Program  

SciTech Connect

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

3

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

4

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

5

Variability of Load and Net Load in Case of Large Scale Distributed Wind Power  

SciTech Connect

Large scale wind power production and its variability is one of the major inputs to wind integration studies. This paper analyses measured data from large scale wind power production. Comparisons of variability are made across several variables: time scale (10-60 minute ramp rates), number of wind farms, and simulated vs. modeled data. Ramp rates for Wind power production, Load (total system load) and Net load (load minus wind power production) demonstrate how wind power increases the net load variability. Wind power will also change the timing of daily ramps.

Holttinen, H.; Kiviluoma, J.; Estanqueiro, A.; Gomez-Lazaro, E.; Rawn, B.; Dobschinski, J.; Meibom, P.; Lannoye, E.; Aigner, T.; Wan, Y. H.; Milligan, M.

2011-01-01T23:59:59.000Z

6

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

7

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

8

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

9

Large-scale wind power integration in Nordland.  

E-Print Network (OSTI)

?? Nord-Norsk Vindkraft AS is planning to build two wind farms in Nordland, Norway. The wind farms are located at Sleneset and Sjonfjellet. The planned (more)

Solvang, Tarjei Benum

2007-01-01T23:59:59.000Z

10

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

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

VP 100: New Facility in Boston to Test Large-Scale Wind Blades VP 100: New Facility in Boston to Test Large-Scale Wind Blades VP 100: New Facility in Boston to Test Large-Scale Wind Blades July 23, 2010 - 1:19pm Addthis Boston's Wind Technology Testing Center, funded in part with Recovery Act funds, will be first in U.S. to test blades up to 300 feet long. | Photo Courtesy of Massachusetts Clean Energy Center Boston's Wind Technology Testing Center, funded in part with Recovery Act funds, will be first in U.S. to test blades up to 300 feet long. | Photo Courtesy of Massachusetts Clean Energy Center Stephen Graff Former Writer & editor for Energy Empowers, EERE America's first-of-its-kind wind blade testing facility - capable of testing a blade as long as a football field - almost never was. Because of funding woes, the Massachusetts Clean Energy Center (MassCEC),

11

Potential climatic impacts and reliability of large-scale offshore wind farms  

Science Journals Connector (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 climate change issue. However, in order to provide even a fraction of the estimated future energy needs, a large-scale deployment of wind turbines (several million) is required. The consequent environmental impacts, and the inherent reliability of such a large-scale usage of intermittent wind power would have to be carefully assessed, in addition to the need to lower the high current unit wind power costs. Our previous study (Wang and Prinn 2010 Atmos. Chem. Phys. 10 2053) using a three-dimensional climate model suggested that a large deployment of wind turbines over land to meet about 10% of predicted world energy needs in 2100 could lead to a significant temperature increase in the lower atmosphere over the installed regions. A global-scale perturbation to the general circulation patterns as well as to the cloud and precipitation distribution was also predicted. In the later study reported here, we conducted a set of six additional model simulations using an improved climate model to further address the potential environmental and intermittency issues of large-scale deployment of offshore wind turbines for differing installation areas and spatial densities. In contrast to the previous land installation results, the offshore wind turbine installations are found to cause a surface cooling over the installed offshore regions. This cooling is due principally to the enhanced latent heat flux from the sea surface to lower atmosphere, driven by an increase in turbulent mixing caused by the wind turbines which was not entirely offset by the concurrent reduction of mean wind kinetic energy. We found that the perturbation of the large-scale deployment of offshore wind turbines to the global climate is relatively small compared to the case of land-based installations. However, the intermittency caused by the significant seasonal wind variations over several major offshore sites is substantial, and demands further options to ensure the reliability of large-scale offshore wind power. The method that we used to simulate the offshore wind turbine effect on the lower atmosphere involved simply increasing the ocean surface drag coefficient. While this method is consistent with several detailed fine-scale simulations of wind turbines, it still needs further study to ensure its validity. New field observations of actual wind turbine arrays are definitely required to provide ultimate validation of the model predictions presented here.

Chien Wang; Ronald G Prinn

2011-01-01T23:59:59.000Z

12

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

SciTech Connect

The National Renewable Energy Laboratory, under the sponsorship of the U.S. Department of Energy, is managing two large-scale wind integration studies. The Western Wind and Solar Integration Study (WWSIS) covers the footprint of WestConnect, a group of transmission owners that covers most of Colorado, New Mexico, Arizona, Nevada, and Wyoming. The Eastern Wind Integration and Transmission Study (EWITS) covers a large part of the Eastern Interconnection, and leverages a large-scale transmission study known as the Joint Coordinated System Plan (JCSP). Both studies analyze the impact of 20-30% wind energy penetration within the study footprint based on energy. This paper discusses key results that have emerged so far from each study, focusing primarily on simulation results based on hourly production simulations. Results from both studies show that high wind penetrations can be successfully integrated into the power system, but depend on sufficient transmission and significant changes in operations.

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

2009-01-01T23:59:59.000Z

13

Wind Scanner: A full-scale Laser Facility for Wind and Turbulence Measurements around large Wind Turbines  

E-Print Network (OSTI)

measurements of the wind fields engulfing today's huge wind turbines. Our aim is to measure in real- time 3D velocity field, ,within the volumes that fully surround the huge wind turbines of today and tomorrow atmospheric flow that surrounds the giant wind turbines. This new knowledge we envision will accelerate

14

current encounters a large island (main islands of Palau) basin-scale currents are driven by winds  

E-Print Network (OSTI)

Summary · current encounters a large island (main islands of Palau) · basin-scale currents are driven by winds · strong boundary currents like Gulf Stream · Palau has a boundary current · current

Johnston, Shaun

15

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

16

Large-scale experimental wind-driven rain exposure investigations of building integrated photovoltaics  

Science Journals Connector (OSTI)

Building integrated photovoltaics (BIPVs) are photovoltaic materials that replace conventional building materials in parts of the building envelopes, such as roofs or facades, i.e. the BIPV system serves dual purposes, as both a building envelope material and a power generator. Hence, it is important to focus on the building envelope properties of a BIPV system in addition to energy generation performance when conducting experimental investigations of BIPVs. The aim of this work was to illustrate challenges linked to the building envelope properties of a BIPV system, and to develop and evaluate relevant methods for testing the building envelope properties of BIPV systems. A sample roof area with two BIPV modules was built and tested in a turnable box for rain and wind tightness testing of sloping building surfaces with the aim of investigating the rain tightness of the BIPV system, and observing how it withstood wind-driven rain at large-scale conditions. The BIPV sample roof went through testing with run-off water and wind-driven rain with incremental pulsating positive differential pressure over the sample at two different inclinations. The BIPV sample roof was during testing constantly visually monitored, and various leakage points were detected. In order to prevent such water penetration, the steel fittings surrounding the BIPV modules should ideally be better adapted to the BIPV modules and constricted to some extent. It is however important to maintain a sufficient ventilation rate simultaneously.

Christer Breivik; Bjrn Petter Jelle; Berit Time; ystein Holmberget; John Nygrd; Einar Bergheim; Arvid Dalehaug

2013-01-01T23:59:59.000Z

17

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

SciTech Connect

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

18

Scale Models & Wind Turbines  

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

Scale Models and Wind Turbines Grades: 5-8, 9-12 Topics: Wind Energy Owner: Kidwind Project This educational material is brought to you by the U.S. Department of Energy's Office of...

19

New England Wind Forum: Large Wind  

Wind Powering America (EERE)

Small Wind Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share Large Wind When establishing wind farms, wind energy developers generally approach landowners where they want to build. Interest in wind farms is frequently spurred by external pressures such as tax and other financial incentives and legislative mandates. Since each situation is influenced by local policies and permitting, we can only provide general guidance to help you learn about the process of installing wind turbines. Publications Wind Project Development Process Permitting of Wind Energy Facilities: A Handbook. (August 2002). National Wind Coordinating Collaborative. Landowner Frequently Asked Questions and Answers. (August 2003). "State Wind Working Group Handbook." pp. 130-133.

20

Running Large Scale Jobs  

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

Running Large Scale Jobs Running Large Scale Jobs Users face various challenges with running and scaling large scale jobs on peta-scale production systems. For example, certain...

Note: This page contains sample records for the topic "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

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

22

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

SciTech Connect

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

23

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

24

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 (more)

Hagerty, John Michael

2012-01-01T23:59:59.000Z

25

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

26

Greenhouse Gas Emissions from Operating Reserves Used to Backup Large-Scale Wind Power  

Science Journals Connector (OSTI)

Power systems already carry significant reserves to compensate for errors in electricity load forecasts or unexpected power plant outages. ... It first specifies the probability distributions for forecast errors at hypothetical wind farm sites, and the correlation between those sites, based on statistical data from 10 existing wind farms. ... This work has also assumed that ample transmission capacity is available to move reserves throughout the region; in reality there may be trade-offs between the cost of transmission upgrades, vs losses on long-distance lines, vs reductions in reserve requirements. ...

Matthias Fripp

2011-07-28T23:59:59.000Z

27

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

28

Subspace predictive repetitive control to mitigate periodic loads on large scale wind turbines  

Science Journals Connector (OSTI)

Abstract Manufacturing and maintenance costs arising out of wind turbine dynamic loading are one of the largest bottlenecks in the roll-out of wind energy. Individual Pitch Control (IPC) is being researched for cost reduction through load alleviation; it poses a challenging mechatronic problem due to its multi-input, multi-output (MIMO) nature and actuation constraints related to the wear of pitch bearings. To address these issues, Subspace Predictive Repetitive Control (SPRC), a novel repetitive control strategy based on the subspace identification paradigm, is presented. First, the Markov parameters of the system are identified online in a recursive manner. These parameters are used to build up the lifted matrices needed to predict the output over the next period. From these matrices an adaptive repetitive control law is derived. To account for actuator limitations, the known shape of wind-induced disturbances is exploited to perform repetitive control in a reduced-dimension basis function subspace. The SPRC methodology is implemented on a high-fidelity numerical aeroelastic environment for wind turbines. Load reductions are achieved similar to those obtained with classical IPC approaches, while considerably limiting the frequency content of the actuator signals.

S.T. Navalkar; J.W. van Wingerden; E. van Solingen; T. Oomen; E. Pasterkamp; G.A.M. van Kuik

2014-01-01T23:59:59.000Z

29

Negative long term effects on harbour porpoises from a large scale offshore wind farm in the Balticevidence of slow recovery  

Science Journals Connector (OSTI)

Offshore wind farms constitute a new and fast growing industry all over the world. This study investigates the long term impact on harbour porpoises, Phocoena phocoena, for more than 10years (200112) from the first large scale offshore wind farm in the world, Nysted Offshore Wind Farm, in the Danish western Baltic Sea (72?2.3MW turbines). The wind farm was brought into full operation in December 2003. At six stations, acoustic porpoise detectors (T-PODs) were placed inside the wind farm area and at a reference area 10km to the east, to monitor porpoise echolocation activity as a proxy of porpoise presence. A modified statistical BACI design was applied to detect changes in porpoise presence before, during and after construction of the wind farm. The results show that the echolocation activity has significantly declined inside Nysted Offshore Wind Farm since the baseline in 20012 and has not fully recovered yet. The echolocation activity inside the wind farm has been gradually increasing (from 11% to 29% of the baseline level) since the construction of the wind farm, possibly due to habituation of the porpoises to the wind farm or enrichment of the environment due to reduced fishing and to artificial reef effects.

Jonas Teilmann; Jacob Carstensen

2012-01-01T23:59:59.000Z

30

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

31

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

SciTech Connect

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

32

Utility Scale Wind turbine Demonstration Project  

SciTech Connect

The purpose of the Three Affiliated Tribes proposing to Department of Energy was nothing new to Denmark. National Meteorological Studies have proved that North Dakota has some of the most consistence wind resources in the world. The Three Affiliated Tribes wanted to assess their potential and become knowledgeable to developing this new and upcoming resource now valuable. By the Tribe implementing the Utility-scale Wind Turbine Project on Fort Berthold, the tribe has proven the ability to complete a project, and has already proceeded in a feasibility studies to developing a large-scale wind farm on the reservation due to tribal knowledge learned, public awareness, and growing support of a Nation wanting clean renewable energy. The tribe is working through the various measures and regulations with the want to be self-sufficient, independent, and marketable with 17,000 times the wind energy needed to service Fort Berthold alone.

Terry Fredericks

2006-03-31T23:59:59.000Z

33

NREL: Wind Research - Utility-Scale Wind Turbine Research  

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

wind turbine research addresses performance and reliability issues that large wind turbines experience throughout their lifespan and reduces system costs through innovative...

34

Sandia National Laboratories: Characterizing Scaled Wind Farm...  

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

Inflow On April 1, 2014, in Energy, News, News & Events, Partnership, Renewable Energy, Wind Energy The Scaled Wind Farm Technology (SWiFT) research facility will provide...

35

Stakeholder Engagement and Outreach: Utility-Scale Land-Based 80-Meter Wind  

Wind Powering America (EERE)

Maps & Data Maps & Data Printable Version Bookmark and Share Utility-Scale Land-Based Maps Wind Resource Potential Offshore Maps Community-Scale Maps Residential-Scale Maps Anemometer Loan Programs & Data Utility-Scale Land-Based 80-Meter Wind Maps The U.S. Department of Energy provides an 80-meter (m) height, high-resolution wind resource map for the United States with links to state wind maps. States, utilities, and wind energy developers use utility-scale wind resource maps to locate and quantify the wind resource, identifying potentially windy sites within a fairly large region and determining a potential site's economic and technical viability. A wind resource map of the United States. Washington wind map and resources. Oregon wind map and resources. California wind map and resources. Idaho wind map and resources. Nevada wind map and resources. Arizona wind map and resources. Utah wind map and resources. Montana wind map and resources. Wyoming wind map and resources. North Dakota wind map and resources. South Dakota wind map and resources. Nebraska wind map and resources. Colorado wind map and resources. New Mexico wind map and resources. Kansas wind map and resources. Oklahoma wind map and resources. Texas wind map and resources. Minnesota wind map and resources. Iowa wind map and resources. Missouri wind map and resources. Arkansas wind map and resources. Lousiana wind map and resources. Wisconsin wind map and resources. Michigan wind map and resources. Michigan wind map and resources. Illinois wind map and resources. Indiana wind map and resources. Ohio wind map and resources. Kentucky wind map and resources. Tennessee wind map and resources. Mississippi wind map and resources. Alabama wind map and resources. Georgia wind map and resources. Florida wind map and resources. South Carolina wind map and resources. North Carolina wind map and resources. West Virginia wind map and resources. Virginia wind map and resources. Maryland wind map and resources. Pennsylvania wind map and resources. Delaware wind map and resources. New Jersey wind map and resources. New York wind map and resources. Maine wind map and resources. Vermont wind map and resources. New Hampshire wind map and resources. Massachusetts wind map and resources. Rhode Island wind map and resources. Connecticut wind map and resources. Alaska wind map and resources. Hawaii wind map and resources.

36

Large Wind Technology | Department of Energy  

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

Large Wind Technology Large Wind Technology Large Wind Technology The Wind Program works with industry partners to increase the performance and reliability of large wind technologies while lowering the cost of wind energy. The program's research efforts have helped to increase the average capacity factor (a measure of power plant productivity) from 22% for wind turbines installed before 1998 to 35% for turbines installed between 2004 and 2007. Wind energy costs have been reduced from over 55 cents (current dollars) per kilowatt-hour (kWh) in 1980 to under six cents/kWh today. To ensure future industry growth, the technology must continue to evolve, building on earlier successes to further improve reliability, increase capacity factors, and reduce costs. This page describes the goal of the

37

Electric power from offshore wind via synoptic-scale interconnection  

Science Journals Connector (OSTI)

...supporting large-scale renewable energy . J Power Sources 144...distributed generation of wind energy in Europe . PhD thesis...measurements . National Renewable Energy Laboratory , p 9 , NREL...resource of southeastern Brazil . Renew Energ 33 : 2375...

Willett Kempton; Felipe M. Pimenta; Dana E. Veron; Brian A. Colle

2010-01-01T23:59:59.000Z

38

Meteorological aspects of siting large wind turbines  

SciTech Connect

This report, which focuses on the meteorological aspects of siting large wind turbines (turbines with a rated output exceeding 100 kW), has four main goals. The first is to outline the elements of a siting strategy that will identify the most favorable wind energy sites in a region and that will provide sufficient wind data to make responsible economic evaluations of the site wind resource possible. The second is to critique and summarize siting techniques that were studied in the Department of Energy (DOE) Wind Energy Program. The third goal is to educate utility technical personnel, engineering consultants, and meteorological consultants (who may have not yet undertaken wind energy consulting) on meteorological phenomena relevant to wind turbine siting in order to enhance dialogues between these groups. The fourth goal is to minimize the chances of failure of early siting programs due to insufficient understanding of wind behavior.

Hiester, T.R.; Pennell, W.T.

1981-01-01T23:59:59.000Z

39

Voltage Impacts of Utility-Scale Distributed Wind  

SciTech Connect

Although most utility-scale wind turbines in the United States are added at the transmission level in large wind power plants, distributed wind power offers an alternative that could increase the overall wind power penetration without the need for additional transmission. This report examines the distribution feeder-level voltage issues that can arise when adding utility-scale wind turbines to the distribution system. Four of the Pacific Northwest National Laboratory taxonomy feeders were examined in detail to study the voltage issues associated with adding wind turbines at different distances from the sub-station. General rules relating feeder resistance up to the point of turbine interconnection to the expected maximum voltage change levels were developed. Additional analysis examined line and transformer overvoltage conditions.

Allen, A.

2014-09-01T23:59:59.000Z

40

Four Corners Wind Resource Center Webinar: Building Utility-Scale...  

Office of Environmental Management (EM)

Four Corners Wind Resource Center Webinar: Building Utility-Scale Wind: Permitting and Regulation Lessons for County Decision-Makers Four Corners Wind Resource Center Webinar:...

Note: This page contains sample records for the topic "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

Utility-Scale Wind Turbines | Open Energy Information  

Open Energy Info (EERE)

Utility-Scale Wind Turbines Jump to: navigation, search Field testing of a wind turbine drivetraintower damper using advanced design and validation techniques at the National Wind...

42

Sandia National Laboratories: Increasing the Scaled Wind Farm...  

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

ClimateECEnergyIncreasing the Scaled Wind Farm Technology Facility's Power Production Increasing the Scaled Wind Farm Technology Facility's Power Production DOE Office of...

43

Sandia National Laboratories: Scaled Wind Farm Technology Facility...  

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

ClimateECEnergyScaled Wind Farm Technology Facility Baselining Project Accelerates Work Scaled Wind Farm Technology Facility Baselining Project Accelerates Work Increasing the...

44

Introduction to Small-Scale Wind Energy Systems (Including RETScreen...  

Open Energy Info (EERE)

Application Design Website: www.leonardo-energy.orgwebinar-introduction-small-scale-wind-energy-s Equivalent URI: cleanenergysolutions.orgcontentintroduction-small-scale-wind-en...

45

Sandia National Laboratories: Offshore Wind RD&D: Large Offshore...  

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

Large Offshore Rotor Development Offshore Wind RD&D: Large Offshore Rotor Development Overview Sandia National Laboratories Wind Energy Technologies Department, creates and...

46

1Design limits and solutions for very large wind turbines Design limits and solutions for very large wind turbines  

E-Print Network (OSTI)

#12;#12;1Design limits and solutions for very large wind turbines UpWind Design limits and solutions for very large wind turbines A 20 MW turbine is feasible March 2011 Supported by: #12;March 20112 Photo:Nordex #12;3Design limits and solutions for very large wind turbines Contents 1. UpWind: Summary

Leu, Tzong-Shyng "Jeremy"

47

Scale Models and Wind Turbines | Department of Energy  

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

Scale Models and Wind Turbines Scale Models and Wind Turbines Below is information about the student activitylesson plan from your search. Grades 5-8, 9-12 Subject Wind Energy...

48

Argonne National Laboratory Develops Extreme-Scale Wind Farm Simulation Capabilities  

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

Researchers at DOE's Argonne National Laboratory are developing a computational simulation tool to conduct studies of complex flow and wind turbine interactions in large land-based and offshore wind farms that will improve wind plant design and reduce the levelized cost of energy. Simulations on a wind-plant-scale require accurate simultaneous resolution of multiple flow scales, from mesoscale weather to turbine-blade scale turbulence, which presents special demands on the computational solver efficiency and requires extreme scalability.

49

International Workshop on Small Scale Wind Energy for Developing Countries  

Open Energy Info (EERE)

Scale Wind Energy for Developing Countries Scale Wind Energy for Developing Countries Jump to: navigation, search Name International Workshop on Small Scale Wind Energy for Developing Countries Agency/Company /Organization Risoe DTU Sector Energy Focus Area Renewable Energy, Wind Topics Implementation, Technology characterizations Resource Type Workshop, Training materials, Lessons learned/best practices Website http://www.risoe.dtu.dk/~/medi References International Workshop on Small Scale Wind Energy for Developing Countries[1] Background "The workshop covers the following main themes: Wind energy technologies, their perspectives and applications in developing countries. Reliability of wind turbines, lifetime and strength of wind turbine components. Low cost and natural materials for wind turbines.

50

Nitrogen isotopes in the recent solar wind from the analysis of genesis targets: evidence for large scale isotope heterogeneity in the nascent solar system  

SciTech Connect

Nitrogen, the fifth most abundant element in the universe, displays the largest stable isotope variations in the solar system reservoirs after hydrogen. Yet the value of isotopic composition of solar nitrogen, presumably the best proxy of the protosolar nebula composition, is not known. Nitrogen isotopes trapped in Genesis spacecraft target material indicate a 40 % depletion of {sup 15}N in solar wind N relative to inner planets and meteorites, and define a composition for the present-day Sun undistinguishable from that of Jupiter's atmosphere. These results indicate that the isotopic composition of of nitrogen in the outer convective zone of the Sun (OCZ) has not changed through time, and is representative of the protosolar nebula. Large {sup 15}N enrichments during e.g., irradiation, or contributions from {sup 15}N-rich presolar components, are required to account for planetary values.

Wiens, Roger C [Los Alamos National Laboratory; Marty, Bernard [INSU-CNRS; Zimmermann, Laurent [INSU-CNRS; Burnard, Peter G [INSU-CNRS; Burnett, Donald L [CALTECH; Heber, Veronika S [ETH ZURICH; Wieler, Rainer [ETH ZURICH; Bochsler, Peter [UNIV OV BERN

2009-01-01T23:59:59.000Z

51

Temporal structure of aggregate power fluctuations in large-eddy simulations of extended wind-farms  

E-Print Network (OSTI)

Fluctuations represent a major challenge for the incorporation of electric power from large wind-farms into power grids. Wind farm power output fluctuates strongly in time, over various time scales. Understanding these fluctuations, especially their spatio-temporal characteristics, is particularly important for the design of backup power systems that must be readily available in conjunction with wind-farms. In this work we analyze the power fluctuations associated with the wind-input variability at scales between minutes to several hours, using large eddy simulations (LES) of extended wind-parks, interacting with the atmospheric boundary layer. LES studies enable careful control of parameters and availability of wind-velocities simultaneously across the entire wind-farm. The present study focuses on neutral atmospheric conditions and flat terrain, using actuator-disk representations of the individual wind-turbines. We consider power from various aggregates of wind-turbines such as the total average power sign...

Stevens, Richard J A M

2014-01-01T23:59:59.000Z

52

Sandia National Laboratories: Scaled Wind Farm Technology Facility  

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

Energy, Facilities, News, News & Events, Partnership, Renewable Energy, SWIFT, Wind Energy One of the primary roles of Sandia's Scaled Wind Farm Technology (SWiFT)...

53

Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy simulation  

E-Print Network (OSTI)

wind direction, and the simulated results agree reasonably with the corresponding experimental data is the use of small-scale models in a wind tunnel to simulate natural ventilation. In general, the mean flow1 Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy

Chen, Qingyan "Yan"

54

Wind Turbine Design Cost and Scaling Model  

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

Wind Turbine Design Cost Wind Turbine Design Cost and Scaling Model L. Fingersh, M. Hand, and A. Laxson Technical Report NREL/TP-500-40566 December 2006 NREL is operated by Midwest Research Institute ● Battelle Contract No. DE-AC36-99-GO10337 Wind Turbine Design Cost and Scaling Model L. Fingersh, M. Hand, and A. Laxson Prepared under Task No. WER6.0703 Technical Report NREL/TP-500-40566 December 2006 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute * Battelle Contract No. DE-AC36-99-GO10337 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government.

55

Doctoral Position Aeroelastic Analysis of Large Wind Turbines  

E-Print Network (OSTI)

Doctoral Position Aeroelastic Analysis of Large Wind Turbines In the research project "Aeroelastic Analysis Horizontal-axis wind turbine and numerical model. of Large Wind Turbines" funded by the Ger- man involving the in-house Finite-Element CFD code XNS to enable the simulation of wind turbines. The ability

56

Applying micro scales of horizontal axis wind turbines for operation in low wind speed regions  

Science Journals Connector (OSTI)

Abstract Utilizing the micro scales of wind turbines could noticeably supply the demand for the electricity in low wind speed regions. Aerodynamic design and optimization of the blade, as a main part of a wind turbine, were addressed in the study. Three micro scales of horizontal axis wind turbines with output power of 0.5, 0.75 and 1kW were considered and the geometric optimization of the blades in terms of the two involved parameters, chord and twist, was undertaken. In order to improve the performance of the turbines at low wind speeds, starting time was included in an objective function in addition to the output power the main and desirable goal of the wind turbine blade design. A purpose-built genetic algorithm was employed to maximize both the output power and the starting performance which were calculated by the blade-element momentum theory. The results emphasize that the larger values of the chord and twist at the root part of the blades are indispensable for the better performance when the wind speed is low. However, the noticeable value of the generator resistive torque could largely delay the starting of the micro-turbines especially for the considered smaller size, 0.5kW, where the starting aerodynamic torque could not overcome the generator resistive torque. For that size, an increase in the number of blades improved both the starting performance and also output power.

Abolfazl Pourrajabian; Reza Ebrahimi; Masoud Mirzaei

2014-01-01T23:59:59.000Z

57

Wind shear for large wind turbine generators at selected tall tower sites  

SciTech Connect

The objective of the study described in this report is to examine the nature of wind shear profiles and their variability over the height of large horizontal-axis wind turbines and to provide information on wind shear relevant to the design and opertion of large wind turbines. Wind turbine fatigue life and power quality are related through the forcing functions on the blade to the shapes of the wind shear profiles and their fluctuations over the disk of rotation.

Elliott, D.L.

1984-04-01T23:59:59.000Z

58

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

59

Wind Turbine Scaling Enables Projects to Reach New Heights |...  

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

Turbine Scaling Enables Projects to Reach New Heights Wind Turbine Scaling Enables Projects to Reach New Heights August 18, 2014 - 9:42am Addthis Turbines at the National Wind...

60

Airfoil family design for large offshore wind turbine blades  

Science Journals Connector (OSTI)

Wind turbine blades size has scaled-up during last years due to wind turbine platform increase especially for offshore applications. The EOLIA project 2007-2010 (Spanish Goverment funded project) was focused on the design of large offshore wind turbines for deep waters. The project was managed by ACCIONA Energia and the wind turbine technology was designed by ACCIONA Windpower. The project included the design of a wind turbine airfoil family especially conceived for large offshore wind turbine blades, in the order of 5MW machine. Large offshore wind turbines suffer high extreme loads due to their size, in addition the lack of noise restrictions allow higher tip speeds. Consequently, the airfoils presented in this work are designed for high Reynolds numbers with the main goal of reducing blade loads and mantainig power production. The new airfoil family was designed in collaboration with CENER (Spanish National Renewable Energy Centre). The airfoil family was designed using a evolutionary algorithm based optimization tool with different objectives, both aerodynamic and structural, coupled with an airfoil geometry generation tool. Force coefficients of the designed airfoil were obtained using the panel code XFOIL in which the boundary layer/inviscid flow coupling is ineracted via surface transpiration model. The desing methodology includes a novel technique to define the objective functions based on normalizing the functions using weight parameters created from data of airfoils used as reference. Four airfoils have been designed, here three of them will be presented, with relative thickness of 18%, 21%, 25%, which have been verified with the in-house CFD code, Wind Multi Block WMB, and later validated with wind tunnel experiments. Some of the objectives for the designed airfoils concern the aerodynamic behavior (high efficiency and lift, high tangential coefficient, insensitivity to rough conditions, etc.), others concern the geometry (good for structural design, compatibility for the different airfoil family members, etc.) and with the ultimate objective that the airfoils will reduce the blade loads. In this paper the whole airfoil design process and the main characteristics of the airfoil family are described. Some force coefficients for the design Reynolds number are also presented. The new designed airfoils have been studied with computational calculations (panel method code and CFD) and also in a wind tunnel experimental campaign. Some of these results will be also presented in this paper.

B Mndez; X Munduate; U San Miguel

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

Argonne National Laboratory Develops Extreme-Scale Wind Farm...  

Office of Environmental Management (EM)

studies of complex flow and wind turbine interactions in large land-based and offshore wind farms that will improve wind plant design and reduce the levelized cost of energy....

62

Commercial Scale Wind Incentive Program | Department of Energy  

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

Commercial Scale Wind Incentive Program Commercial Scale Wind Incentive Program Commercial Scale Wind Incentive Program < Back Eligibility Agricultural Commercial Local Government Nonprofit Residential Schools State Government Savings Category Wind Buying & Making Electricity Maximum Rebate Project Development Assistance: $40,000 Program Info State Oregon Program Type State Rebate Program Rebate Amount Varies Provider Energy Trust of Oregon Energy Trust of Oregon's Commercial Scale Wind offering provides resources and cash incentives to help communities, businesses land owners, and government entities install wind turbine systems up to 20 megawatts (MW) in capacity. Projects may consist of a single turbine or a small group of turbines. A variety of ownership models are allowed. Incentive programs

63

Large-Eddy Simulation of Langmuir Turbulence in Pure Wind Seas  

Science Journals Connector (OSTI)

The scaling of turbulent kinetic energy (TKE) and its vertical component (VKE) in the upper ocean boundary layer, forced by realistic wind stress and surface waves including the effects of Langmuir circulations, is investigated using large-eddy ...

Ramsey R. Harcourt; Eric A. DAsaro

2008-07-01T23:59:59.000Z

64

Power System Operation with Large Penetrations of Wind Power  

Science Journals Connector (OSTI)

The characteristics of wind power result in unique challenges for system operators when integrating large penetrations of wind generation into power systems. This chapter discusses some of the power system ope...

Eleanor Denny

2013-01-01T23:59:59.000Z

65

Wind Extremes and Scales: Multifractal Insights and Empirical Evidence  

E-Print Network (OSTI)

-time scales (e.g. gusts, tempests, etc.) is of prime importance for a safe and efficient wind energy potential estimates and wind farm implementation. We discuss the consequences of the multifractal behaviour17 Wind Extremes and Scales: Multifractal Insights and Empirical Evidence I. Tchiguirinskaia, D

Lovejoy, Shaun

66

Cost Study for Large Wind Turbine Blades  

SciTech Connect

The cost study for large wind turbine blades reviewed three blades of 30 meters, 50 meters, and 70 meters in length. Blade extreme wind design loads were estimated in accordance with IEC Class I recommendations. Structural analyses of three blade sizes were performed at representative spanwise stations assuming a stressed shell design approach and E-glass/vinylester laminate. A bill of materials was prepared for each of the three blade sizes using the laminate requirements prepared during the structural analysis effort. The labor requirements were prepared for twelve major manufacturing tasks. TPI Composites developed a conceptual design of the manufacturing facility for each of the three blade sizes, which was used for determining the cost of labor and overhead (capital equipment and facilities). Each of the three potential manufacturing facilities was sized to provide a constant annual rated power production (MW per year) of the blades it produced. The cost of the production tooling and overland transportation was also estimated. The results indicate that as blades get larger, materials become a greater proportion of total cost, while the percentage of labor cost is decreased. Transportation costs decreased as a percentage of total cost. The study also suggests that blade cost reduction efforts should focus on reducing material cost and lowering manufacturing labor, because cost reductions in those areas will have the strongest impact on overall blade cost.

ASHWILL, THOMAS D.

2003-05-01T23:59:59.000Z

67

WINDExchange: Community-Scale 50-Meter Wind Maps  

Wind Powering America (EERE)

Community-Scale 50-Meter Wind Maps The U.S. Department of Energy provides 50-meter (m) height, high-resolution wind resource maps for most of the states and territories of Puerto...

68

WINDExchange: Residential-Scale 30-Meter Wind Maps  

Wind Powering America (EERE)

Residential-Scale 30-Meter Wind Maps The U.S. Department of Energy provides 30-meter (m) height, high-resolution wind resource maps for the United States. Businesses, farms, and...

69

Sun Also Rises: Planning for Large-Scale Solar Power  

SciTech Connect

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

70

Scaling of the electron dissipation range of solar wind turbulence  

E-Print Network (OSTI)

Electron scale solar wind turbulence has attracted great interest in recent years. Clear evidences have been given from the Cluster data that turbulence is not fully dissipated near the proton scale but continues cascading down to the electron scales. However, the scaling of the energy spectra as well as the nature of the plasma modes involved at those small scales are still not fully determined. Here we survey 10 years of the Cluster search-coil magnetometer (SCM) waveforms measured in the solar wind and perform a statistical study of the magnetic energy spectra in the frequency range [$1, 180$]Hz. We show that a large fraction of the spectra exhibit clear breakpoints near the electon gyroscale $\\rho_e$, followed by steeper power-law like spectra. We show that the scaling below the electron breakpoint cannot be determined unambiguously due to instrumental limitations that will be discussed in detail. We compare our results to recent ones reported in other studies and discuss their implication on the physical...

Sahraoui, F; De Patoul, J; Belmont, G; Goldstein, M L; Retino, A; Robert, P; Cornilleau-Wehrlin, N; Canu, P

2013-01-01T23:59:59.000Z

71

E-Print Network 3.0 - american large wind Sample Search Results  

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

installation capacity, growth rate, costs of wind power, small versus large wind turbines, and onshore ver- sus... strategies. Many large wind power generation facilities...

72

Wakes in very large wind farms and the effect of neighbouring wind farms  

Science Journals Connector (OSTI)

We present the first analysis of wake losses in some of the largest offshore wind farms built to date. In addition, we give an example of the external wake losses that can be imposed by a neighbouring wind farm. Both situations lend insights to the wake phenomena in large offshore wind farm clusters. A simple wake model is compared to the data to assess the need for a more detailed physical description of large wind farm wakes.

Nicolai Gayle Nygaard

2014-01-01T23:59:59.000Z

73

Wind Energy: Large and Small Systems Competing  

Science Journals Connector (OSTI)

...the wheat in Kansas. Wind power...of mass-production they offer...systems produce electricity or drive-shaft...the specific site. Interference...Based on a production run of 1000...econ-omies of production in the past...could produce electricity at a cost...winds at the site, plus the...

WILLIAM D. METZ

1977-09-02T23:59:59.000Z

74

Large-eddy simulation of offshore wind farm  

Science Journals Connector (OSTI)

A hybrid numerical capability is developed for the simulation of offshore wind farms in which large-eddy simulation is performed for the wind turbulence and a potential flow based method is used for the simulation of the ocean wave field. The wind and wave simulations are dynamically coupled. The effect of wind turbines on the wind field is represented by an actuator disk model. This study focuses on the effect of wind-seas and the turbine motion is treated as negligibly small. A variety of fully-developed and fetch-limited wind-sea conditions and turbine spacings are considered in the study. Statistical analyses are performed for the simulation results with a focus on the mean wind profile kinetic energy budget in the wind field and the wind turbine power extraction rate. The results indicate that the waves have appreciable effect on the wind farm performance. The wind turbines obtain a higher wind power extraction rate under the fully developed wind-sea condition compared with that under the fetch-limited condition. This higher extraction rate is caused by the faster propagating waves and the lower sea-surface resistance on the wind when the wind-seas are fully developed. The wave-induced difference can be as high as 8% with the commonly used turbine spacing in commercial land-based wind farms s x = 7 (with s x being the ratio of streamwise turbine spacing to the turbine diameter). Such level of difference is noteworthy considering the previous understanding that direct wave-induced disturbance to the wind field decays exponentially away from wave surface.

2014-01-01T23:59:59.000Z

75

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

76

Expedited Permitting of Grid-Scale Wind Energy Development (Maine) |  

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

Expedited Permitting of Grid-Scale Wind Energy Development (Maine) Expedited Permitting of Grid-Scale Wind Energy Development (Maine) Expedited Permitting of Grid-Scale Wind Energy Development (Maine) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Wind Buying & Making Electricity Program Info State Maine Program Type Siting and Permitting Maine's Expedited Permitting of Grid-Scale Wind Energy Development statue provides an expedited permitting pathway for proposed wind developments in

77

Large Commercial Wind Exemption and Alternative Taxes  

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

In South Dakota, wind farms constructed after July 1, 2007, are subject to an alternative taxation calculation in lieu of all taxes on real and personal property levied by the state, counties,...

78

Ris-R-1532(EN) Operation and control of large wind  

E-Print Network (OSTI)

Risø-R-1532(EN) Operation and control of large wind turbines and wind farms - Final report Poul, Henrik Madsen and Martin H. Donovan Title: Operation and control of large wind turbines and wind farms "Operation and control of large wind turbines and wind farms". The objective of the project has been

79

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network (OSTI)

Analysis of Wind Power and Load Data at Multiple Time ScalesAnalysis of Wind Power and Load Data at Multiple Time ScalesAnalysis of Wind Power and Load Data at Multiple Time Scales

Coughlin, Katie

2011-01-01T23:59:59.000Z

80

Superconducting generators for large off shore wind turbines  

E-Print Network (OSTI)

This thesis describes four novel superconducting machine concepts, in the pursuit of finding a suitable design for large offshore wind turbines. The designs should be reliable, modular and light-weight. The main novelty ...

Keysan, Ozan

2014-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "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

Commonwealth Wind Community-Scale Initiative | Department of Energy  

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

Commonwealth Wind Community-Scale Initiative Commonwealth Wind Community-Scale Initiative Commonwealth Wind Community-Scale Initiative < Back Eligibility Agricultural Commercial Fed. Government Industrial Institutional Local Government Low-Income Residential Multi-Family Residential Nonprofit Schools State Government Tribal Government Savings Category Wind Buying & Making Electricity Maximum Rebate Public Entities: $100,000 Non-Public Entities: $67,000 Program Info Funding Source Massachusetts Clean Energy Center (MassCEC) Expiration Date 08/01/2013 State Massachusetts Program Type State Grant Program Rebate Amount Varies depending on applicant type (public vs. non-public) and grant type (site assessment, feasibility study, onsite wind monitoring, acoustic studies, and business planning) Provider Massachusetts Clean Energy Center

82

Large-scale anisotropy in stably stratified rotating flows  

SciTech Connect

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

83

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.

84

Large scale electronic structure calculations  

Science Journals Connector (OSTI)

We formulate the Kohn-Sham density functional theory in terms of nonorthogonal, localized orbitals. Within this formulation we introduce a simple and effective method to localize the orbitals. Our approach leads to a plane-wave-based algorithm for total energy calculations whose computational complexity is of O(N), where N is the number of electrons. This opens the way to calculations of unprecedented scale. Our method appears to be of general character and applicable in other contexts such as quantum chemical or projected quantum Monte Carlo calculations.

Giulia Galli and Michele Parrinello

1992-12-14T23:59:59.000Z

85

Stakeholder Engagement and Outreach: Residential-Scale 30-Meter Wind Maps  

Wind Powering America (EERE)

Residential-Scale 30-Meter Wind Maps Residential-Scale 30-Meter Wind Maps The Stakeholder Engagement and Outreach initiative provides 30-meter (m) height, high-resolution wind resource maps for the United States. Businesses, farms, and homeowners use residential-scale wind resource maps to identify wind sites that may be appropriate for small-scale wind projects. A wind resource map of the United States. Go to the California wind resource map. Go to the Washington wind resource map. Go to the Oregon wind resource map. Go to the Idaho wind resource map. Go to the Nevada wind resource map. Go to the Montana wind resource map. Go to the Wyoming wind resource map. Go to the Utah wind resource map. Go to the Colorado wind resource map. Go to the Arizona wind resource map. Go to the New Mexico wind resource map. Go to the North Dakota wind resource map. Go to the South Dakota wind resource map. Go to the Nebraska wind resource map. Go to the Kansas wind resource map. Go to the Oklahoma wind resource map. Go to the Texas wind resource map. Go to the Minnesota wind resource map. Go to the Iowa wind resource map. Go to the Missouri wind resource map. Go to the Arkansas wind resource map. Go to the Louisiana wind resource map. Go to the Wisconsin wind resource map. Go to the Illinois wind resource map. Go to the Indiana wind resource map. Go to the Michigan wind resource map. Go to the Ohio wind resource map. Go to the Kentucky wind resource map. Go to the Tennessee wind resource map. Go to the Mississippi wind resource map. Go to the Alabama wind resource map. Go to the Florida wind resource map. Go to the Georgia wind resource map. Go to the South Carolina wind resource map. Go to the North Carolina wind resource map. Go to the Virginia wind resource map. Go to the West Virginia wind resource map. Go to the Pennsylvania wind resource map. Go to the Maryland wind resource map. Go to the Delaware wind resource map. Go to the New Jersey wind resource map. Go to the New York wind resource map. Go to the Connecticut wind resource map. Go to the Rhode Island wind resource map. Go to the Massachusetts wind resource map. Go to the Vermont wind resource map. Go to the New Hampshire wind resource map. Go to the Maine wind resource map. Go to the Alaska wind resource map. Go to the Hawaii wind resource map.

86

DLFM library tools for large scale dynamic applications.  

NLE Websites -- All DOE Office Websites (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...

87

Documenting Wind Speed and Power Deficits behind a Utility-Scale Wind Turbine  

Science Journals Connector (OSTI)

High-spatial-and-temporal-resolution radial velocity measurements surrounding a single utility-scale wind turbine were collected using the Texas Tech University Ka-band mobile research radars. The measurements were synthesized to construct the ...

Brian D. Hirth; John L. Schroeder

2013-01-01T23:59:59.000Z

88

Impact of Utility-Scale Distributed Wind on Transmission-Level System Operations  

SciTech Connect

This report presents a new renewable integration study that aims to assess the potential for adding distributed wind to the current power system with minimal or no upgrades to the distribution or transmission electricity systems. It investigates the impacts of integrating large amounts of utility-scale distributed wind power on bulk system operations by performing a case study on the power system of the Independent System Operator-New England (ISO-NE).

Brancucci Martinez-Anido, C.; Hodge, B. M.

2014-09-01T23:59:59.000Z

89

Relationship between Solar Wind and Coronal Heating: Scaling Laws from Solar X-Rays  

Science Journals Connector (OSTI)

Pevtsov et al. recently showed that the luminosity of solar and stellar X-rays from closed magnetic structures scales nearly linearly with magnetic flux over 12 decades. We show here that the total power available to accelerate the solar wind also scales linearly with magnetic flux, provided that its sources inject a roughly constant energy per particle prior to losses from heat conducted by electrons into radiation. Using a recently developed model of the solar wind energy source and particle source, we calculate the available solar wind power and convert it into an equivalent X-ray luminosity to explore whether the same process that drives solar wind may also power coronal heating. The quantitative results agree remarkably well with the Pevtsov et al. X-ray observations and with GOES X-ray observations over almost two solar cycles from 1985 to 2004. The model for the solar wind energy and particle source relies on the continual reconfiguration of the supergranular network through the emergence of small bipolar or more complex closed magnetic fields. This naturally leads to an energy flux proportional to field strength on large-scale field structures with field strengths larger than the emerging flux. We conclude that the sources of energy for the solar wind and coronal heating are linked, likely through the emergence of new magnetic flux that continually reconfigures large-scale solar magnetic fields and powers and heats the corona.

N. A. Schwadron; D. J. McComas; C. DeForest

2006-01-01T23:59:59.000Z

90

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

91

Astraeus Wind Energy Inc | Open Energy Information  

Open Energy Info (EERE)

Sector: Wind energy Product: Michigan-based manufacturer of large scale, advanced composite wind blades and hub-related components. References: Astraeus Wind Energy Inc1 This...

92

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations  

E-Print Network (OSTI)

for large scale electronic structure calculations. J. Phys.large-scale electronic struc- ture calculations. Phys. Rev.Large-Scale Electronic Structure Calculations Lin-Wang Wang,

Wang, Lin-Wang

2008-01-01T23:59:59.000Z

93

Linear scaling 3D fragment method for large-scale electronic structure calculations  

E-Print Network (OSTI)

large-scale electronic structure calculations. Phys. Rev. B,for large scale electronic structure calculations. J. Phys.Large-Scale Electronic Structure Calculations Lin-Wang Wang,

Wang, Lin-Wang

2008-01-01T23:59:59.000Z

94

Status of Power Generation by Domestic Scale Wind Turbines in Australia  

Science Journals Connector (OSTI)

The world's fossil fuel energy resources are diminishing at a faster rate and most importantly the liquid fossil fuel is expected to be finished by 2060s. Moreover, the fossil fuel is directly related to air pollution, land and water degradation. The danger of climate change due to global warming caused by greenhouse gas emissions compels the policy makers, scientists and researchers globally to explore power generation from renewable sources such as wind. Despite significant progresses have been made in power generation using large scale wind turbines recently, domestic scale wind turbines that have immense potentials for standalone power generation are not explored and adequately researched. Therefore, the primary objective of this study is to review and analyse the potentials for power generation by domestic scale wind turbines for the residential and semi-commercial applications. The study reviews the current status of wind characteristics in built-up areas, economic feasibility, aerodynamic and technological limits, local government planning requirement, local and foreign small scale wind turbine manufacturers.

Firoz Alam; Abdulkadir Ali; Iftekhar Khan; Saleh Mobin

2012-01-01T23:59:59.000Z

95

Making the Economic Case for Small-Scale Distributed Wind -- A Screening for Distributed Generation Wind Opportunities: Preprint  

SciTech Connect

This study was an offshoot of a previous assessment, which examined the potential for large-scale, greater than 50 MW, wind development on occupied federal agency lands. The study did not find significant commercial wind development opportunities, primarily because of poor wind resource on available and appropriately sized land areas or land use or aesthetic concerns. The few sites that could accommodate a large wind farm failed to have transmission lines in optimum locations required to generate power at competitive wholesale prices. The study did identify a promising but less common distributed generation (DG) development option. This follow-up study documents the NREL/Global Energy Concepts team efforts to identify economic DG wind projects at a select group of occupied federal sites. It employs a screening strategy based on project economics that go beyond quantity of windy land to include state and utility incentives as well as the value of avoided power purchases. It attempts to account for the extra costs and difficulties associated with small projects through the use of project scenarios that are more compatible with federal facilities and existing land uses. These benefits and barriers of DG are discussed, and the screening methodology and results are included. The report concludes with generalizations about the screening method and recommendations for improvement and other potential applications for this methodology.

Kandt, A.; Brown, E.; Dominick, J.; Jurotich, T.

2007-06-01T23:59:59.000Z

96

Initial Economic Analysis of Utility-scale Wind Integration in Hawaii  

Office of Energy Efficiency and Renewable Energy (EERE)

Summarizes analysis of the economic characteristics of the utility-scale wind configuration project that has been referred to as the Big Wind project.

97

Stakeholder Engagement and Outreach: Community-Scale 50-Meter Wind Maps  

Wind Powering America (EERE)

Community-Scale 50-Meter Wind Maps Community-Scale 50-Meter Wind Maps The Stakeholder Engagement and Outreach initiative provides 50-meter (m) height, high-resolution wind resource maps for most of the states and territories of Puerto Rico and the Virgin Islands in the United States. Counties, towns, utilities, and schools use community-scale wind resource maps to locate and quantify the wind resource, identifying potentially windy sites determining a potential site's economic and technical viability. Map of the updated wind resource assessment status for the United States. Go to the Washington wind resource map. Go to the Oregon wind resource map. Go to the California wind resource map. Go to the Nevada wind resource map. Go to the Idaho wind resource map. Go to the Utah wind resource map. Go to the Arizona wind resource map. Go to the Montana wind resource map. Go to the Wyoming wind resource map. Go to the Colorado wind resource map. Go to the New Mexico wind resource map. Go to the North Dakota wind resource map. Go to the South Dakota wind resource map. Go to the Nebraska wind resource map. Go to the Kansas wind resource map. Go to the Oklahoma wind resource map. Go to the Missouri wind resource map. Go to the Alaska wind resource map. Go to the Hawaii wind resource map. Go to the Michigan wind resource map. Go to the Illinois wind resource map. Go to the Indiana wind resource map. Go to the Ohio wind resource map. Go to the North Carolina wind resource map. Go to the Virginia wind resource map. Go to the Maryland wind resource map. Go to the West Virginia wind resource map. Go to the Pennsylvania wind resource map. Go to the Rhode Island wind resource map. Go to the Connecticut wind resource map. Go to the Massachusetts wind resource map. Go to the Vermont wind resource map. Go to the New Hampshire wind resource map. Go to the Maine wind resource map. Go to the Kentucky wind resource map. Go to the Tennessee wind resource map. Go to the Arkansas wind resource map. Go to the Puerto Rico wind resource map. Go to the U.S. Virgin Islands wind resource map. Go to the New Jersey wind resource map. Go to the Delaware wind resource map.

98

Analysis of Wind Power and Load Data at Multiple Time Scales  

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

Analysis of Wind Power and Load Data at Multiple Time Scales Analysis of Wind Power and Load Data at Multiple Time Scales Title Analysis of Wind Power and Load Data at Multiple Time Scales Publication Type Report LBNL Report Number LBNL-4147E Year of Publication 2010 Authors Coughlin, Katie, and Joseph H. Eto Date Published 12/2010 Publisher LBNL City Berkeley Keywords renewable generation integration Abstract In this study we develop and apply new methods of data analysis for high resolution wind power and system load time series, to improve our understanding of how to characterize highly variable wind power output and the correlations between wind power and load. These methods are applied to wind and load data from the ERCOT region, and wind power output from the PJM and NYISO areas. We use a wavelet transform to apply mathematically well-defined operations of smoothing and differencing to the time series data. This approach produces a set of time series of the changes in wind power and load (or "deltas"), over a range of times scales from a few seconds to approximately one hour. A number of statistical measures of these time series are calculated. We present sample distributions, and devise a method for fitting the empirical distribution shape in the tails. We also evaluate the degree of serial correlation, and linear correlation between wind and load. Our examination of the data shows clearly that the deltas do not follow a Gaussian shape; the distribution is exponential near the center and appears to follow a power law for larger fluctuations. Gaussian distributions are frequently used in modeling studies. These are likely to over-estimate the probability of small to moderate deviations. This in turn may lead to an over-estimation of the additional reserve requirement (hence the cost) for high penetration of wind. The Gaussian assumption provides no meaningful information about the real likelihood of large fluctuations. The possibility of a power law distribution is interesting because it suggests that the distribution shape for of wind power fluctuations may become independent of system size for large enough systems.

99

Quiet airfoils for small and large wind turbines  

DOE Patents (OSTI)

Thick airfoil families with desirable aerodynamic performance with minimal airfoil induced noise. The airfoil families are suitable for a variety of wind turbine designs and are particularly well-suited for use with horizontal axis wind turbines (HAWTs) with constant or variable speed using pitch and/or stall control. In exemplary embodiments, a first family of three thick airfoils is provided for use with small wind turbines and second family of three thick airfoils is provided for use with very large machines, e.g., an airfoil defined for each of three blade radial stations or blade portions defined along the length of a blade. Each of the families is designed to provide a high maximum lift coefficient or high lift, to exhibit docile stalls, to be relatively insensitive to roughness, and to achieve a low profile drag.

Tangler, James L. (Boulder, CO); Somers, Dan L. (Port Matilda, PA)

2012-06-12T23:59:59.000Z

100

Four Corners Wind Resource Center Webinar: Building Utility-Scale Wind: Permitting and Regulation Lessons for County Decision-Makers  

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

The Four Corners Wind Resource Center will host this webinar exploring lessons learned in the permitting of utility-scale wind projects and the development of ordinances and regulations for...

Note: This page contains sample records for the topic "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

Economic assessment of small-scale electricity generation from wind  

E-Print Network (OSTI)

Analysis was done to determine if small-scale wind energy could be economically feasible on a cotton farm with 1,200 irrigated acres, a house, and a barn. Lubbock and Midland were locations chosen for this model farm and the twenty-year analysis. A...

McAllister, Kristen Dawn

2007-09-17T23:59:59.000Z

102

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

103

File:Beaufort wind scale.pdf | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search File Edit History Facebook icon Twitter icon » File:Beaufort wind scale.pdf Jump to: navigation, search File File history File usage Metadata File:Beaufort wind scale.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Full resolution ‎(1,275 × 1,650 pixels, file size: 28 KB, MIME type: application/pdf) [Category:Wind for Schools Portal Curricula]] File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 16:44, 2 January 2014 Thumbnail for version as of 16:44, 2 January 2014 1,275 × 1,650 (28 KB) Foteri (Talk | contribs) [Category:Wind for Schools Portal Curricula]][[Category:Wind for Schools Elementary School Curricula]

104

COLLISIONLESS DAMPING AT ELECTRON SCALES IN SOLAR WIND TURBULENCE  

SciTech Connect

The dissipation of turbulence in the weakly collisional solar wind plasma is governed by unknown kinetic mechanisms. Two candidates have been suggested to play an important role in the dissipation, collisionless damping via wave-particle interactions and dissipation in small-scale current sheets. High resolution spacecraft measurements of the turbulent magnetic energy spectrum provide important constraints on the dissipation mechanism. The limitations of popular fluid and hybrid numerical schemes for simulation of the dissipation of solar wind turbulence are discussed, and instead a three-dimensional kinetic approach is recommended. We present a three-dimensional nonlinear gyrokinetic simulation of solar wind turbulence at electron scales that quantitatively reproduces the exponential form of the turbulent magnetic energy spectrum measured in the solar wind. A weakened cascade model that accounts for nonlocal interactions and collisionless Landau damping also quantitatively agrees with the observed exponential form. These results establish that a turbulent cascade of kinetic Alfven waves that is terminated by collisionless Landau damping is sufficient to explain the observed magnetic energy spectrum in the dissipation range of solar wind turbulence.

TenBarge, J. M.; Howes, G. G. [Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242 (United States); Dorland, W., E-mail: jason-tenbarge@uiowa.edu [Department of Physics, University of Maryland, College Park, MA 20742-3511 (United States)

2013-09-10T23:59:59.000Z

105

A Tree Swaying in a Turbulent Wind: A Scaling Analysis  

E-Print Network (OSTI)

A tentative scaling theory is presented of a tree swaying in a turbulent wind. It is argued that the turbulence of the air within the crown is in the inertial regime. An eddy causes a dynamic bending response of the branches according to a time criterion. The resulting expression for the penetration depth of the wind yields an exponent which appears to be consistent with that pertaining to the morphology of the tree branches. An energy criterion shows that the dynamics of the branches is basically passive. The possibility of hydrodynamic screening by the leaves is discussed.

Theo Odijk

2014-07-10T23:59:59.000Z

106

Energy Department Applauds Nation's First Large-Scale Industrial...  

Office of Environmental Management (EM)

Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage...

107

Hybrid Parallelism for Volume Rendering at Large Scale at NERSC  

NLE Websites -- All DOE Office Websites (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''...

108

Large-Scale Renewable Energy Guide  

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

Renewable Energy Guide Renewable Energy Guide Brad Gustafson, FEMP 2 Large-scale RE Guide Large-scale RE Guide: Developing Renewable Energy Projects Larger than 10 MWs at Federal Facilities Introduction and Overview Federal Utility Partnership Working Group May 22, 2013 Federal Energy Management Program Office of Energy Efficiency and Renewable Energy U.S. Department of Energy 3 Federal Energy Management Program FEMP works with key individuals to accomplish energy change within organizations by bringing expertise from all levels of project and policy implementation to enable Federal Agencies to meet energy related goals and to provide energy leadership to the country. 4 FEMP Renewable Energy * Works to increase the proportion of renewable energy in the Federal government's energy mix.

109

The large-scale structure of vacuum  

E-Print Network (OSTI)

The vacuum state in quantum field theory is known to exhibit an important number of fundamental physical features. In this work we explore the possibility that this state could also present a non-trivial space-time structure on large scales. In particular, we will show that by imposing the renormalized vacuum energy-momentum tensor to be conserved and compatible with cosmological observations, the vacuum energy of sufficiently heavy fields behaves at late times as non-relativistic matter rather than as a cosmological constant. In this limit, the vacuum state supports perturbations whose speed of sound is negligible and accordingly allows the growth of structures in the vacuum energy itself. This large-scale structure of vacuum could seed the formation of galaxies and clusters very much in the same way as cold dark matter does.

Albareti, F D; Maroto, A L

2014-01-01T23:59:59.000Z

110

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

111

Simulations of an offshore wind farm using large eddy simulation and a torque-controlled actuator disc model  

E-Print Network (OSTI)

We present here a computational fluid dynamics (CFD) simulation of Lillgrund offshore wind farm, which is located in the {\\O}resund Strait between Sweden and Denmark. The simulation combines a dynamic representation of wind turbines embedded within a Large-Eddy Simulation CFD solver, and uses hr-adaptive meshing to increase or decrease mesh resolution where required. This allows the resolution of both large scale flow structures around the wind farm, and local flow conditions at individual turbines; consequently, the response of each turbine to local conditions can be modelled, as well as the resulting evolution of the turbine wakes. This paper provides a detailed description of the turbine model which simulates interactions between the wind, turbine rotors, and turbine generators by calculating the forces on the rotor, the body forces on the air, and instantaneous power output. This model was used to investigate a selection of key wind speeds and directions, investigating cases where a row of turbines would ...

Creech, Angus; Maguire, A Eoghan

2014-01-01T23:59:59.000Z

112

A Review of "Small-Scale Wind Turbines Policy Perspectives and  

E-Print Network (OSTI)

ERG/200607 A Review of "Small-Scale Wind Turbines ­ Policy Perspectives and Recommendations of Engineering Mathematics at Dalhousie University. #12;Hughes-Long: A Review of Small-Scale Wind Turbines proposed changes to their municipal Bylaws to allow the installation of "small-scale" wind turbines (i

Hughes, Larry

113

Spatial Variation in Extreme Winds Predicts Large Wildfire Locations in Chaparral Ecosystems  

E-Print Network (OSTI)

Spatial Variation in Extreme Winds Predicts Large Wildfire Locations in Chaparral Ecosystems Max A are also reported to experience large fires driven by extreme wind events. The following are a sample from the popular press that highlight the importance of hot and dry winds in driving the growth of large fires

Moritz, Max A.

114

Nature of Subproton Scale Turbulence in the Solar Wind  

Science Journals Connector (OSTI)

The nature of subproton scale fluctuations in the solar wind is an open question, partly because two similar types of electromagnetic turbulence can occur: kinetic Alfvn turbulence and whistler turbulence. These two possibilities, however, have one key qualitative difference: whistler turbulence, unlike kinetic Alfvn turbulence, has negligible power in density fluctuations. In this Letter, we present new observational data, as well as analytical and numerical results, to investigate this difference. These results show, for the first time, that the fluctuations well below the proton scale are predominantly kinetic Alfvn turbulence, and, if present at all, the whistler fluctuations make up only a small fraction of the total energy.

C. H. K. Chen; S. Boldyrev; Q. Xia; J. C. Perez

2013-05-31T23:59:59.000Z

115

Impacts of large quantities of wind energy on the electric power system  

E-Print Network (OSTI)

Wind energy has been surging on a global scale. Significant penetration of wind energy is expected to take place in the power system, bringing new challenges because of the variability and uncertainty of this renewable ...

Yao, Yuan, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

116

Large Eddy Simulation of wind farm aerodynamics: A review  

Science Journals Connector (OSTI)

Abstract To study wind farm aerodynamics (WFA), the Wind Power industry currently relies on simple Engineering Models (EM) that simulate wind farms using basic principles of physics and empirically established approximations. \\{EMs\\} are fast and accurate for an overview of WFA and gauging mean power production, but cannot resolve phenomena like wake meandering, effect of atmospheric stratification on wake development, a turbine?s response to partial wake interaction and yawed inflows etc., and their relation with turbine loading, which require a first principle physics-based model, namely Computational Fluid Dynamics (CFD). Although advances in computer technology have promoted the application of CFD, the study of WFA is yet unworkable with Direct Numerical Simulation, which is the most comprehensive CFD technique. Thus, as a trade-off between cost and detail, researchers must resort to Large Eddy Simulation (LES) to garner thorough knowledge of WFA, which could in succession help the industry improve engineering models. This paper summarises the contributions of various LES investigations into WFA and how they have helped broaden our understanding of the subject. Additionally, the article touches upon the optimal use of LES and of the resultant data, and also the challenges faced by LES.

D. Mehta; A.H. van Zuijlen; B. Koren; J.G. Holierhoek; H. Bijl

2014-01-01T23:59:59.000Z

117

Large-Scale Cotton Production in Texas.  

E-Print Network (OSTI)

introduction of tractor power and improved farm machinery in cotton-growing, the new methods in cotton har- vesting, and the recent improvements in machinery for ex- tracting the burs and cleaning the lint in the ginning process, mark the beginning of a new.... Specifically, it seeks: (1) to describe the common practices and show the ac- complishn~ents in the principal operations involved in large- scale cotton production, (2) to compare the use of animal and tractor power, (3) to point out the influence...

Gabbard, L. P. (Letcher P.); Jones, Fred Rufus

1927-01-01T23:59:59.000Z

118

Large-Spin and Large-Winding Expansions of Giant Magnons and Single Spikes  

E-Print Network (OSTI)

We generalize the method of our recent paper on large-spin expansions of Gubser-Klebanov-Polyakov (GKP) strings to the large-spin and large-winding expansions of finite-size giant magnons and finite-size single spikes. By expressing the energies of long open strings in RxS2 in terms of Lambert's W-function, we compute the leading, subleading and next-to-subleading series of classical exponential corrections to the dispersion relations of Hofman-Maldacena giant magnons and infinite-winding single spikes. We also compute the corresponding expansions in the doubled regions of giant magnons and single spikes that are respectively obtained when their angular and linear velocities become smaller or greater than unity.

Emmanuel Floratos; Georgios Linardopoulos

2014-06-03T23:59:59.000Z

119

How Much Energy Is Transferred from the Winds to the Thermocline on ENSO Time Scales?  

E-Print Network (OSTI)

How Much Energy Is Transferred from the Winds to the Thermocline on ENSO Time Scales? JACLYN N the winds (via wind power) and changes in the storage of available potential energy in the tropical ocean~o is characterized by a decrease in wind power that leads to a decrease in available potential energy, and hence

120

Large winding sector of AdS/CFT  

Science Journals Connector (OSTI)

We study a family of classical strings on ? S3 subspace of the AdS5 ? S5 background that interpolates between pulsating strings and single-spike strings. They are obtained from the helical strings of hep-th/0609026 by interchanging worldsheet time and space coordinates, which maps rotating/spinning string states with large spins to oscillating states with large winding numbers. From a finite-gap perspective, this transformation is realised as an interchange of quasi-momentum and quasi-energy defined for the algebraic curve. The gauge theory duals are also discussed, and are identified with operators in the non-holomorphic sector of 𝒩 = 4 super Yang-Mills. They can be viewed as excited states above the ``antiferromagnetic'' state, which is ``as far from BPS as possible'' in the spin-chain spectrum. Furthermore, we investigate helical strings on AdS3 ? S1 in an appendix.

Hirotaka Hayashi; Keisuke Okamura; Ryo Suzuki; Benot Vicedo

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

Large Winding Sector of AdS/CFT  

E-Print Network (OSTI)

We study a family of classical strings on R x S^3 subspace of the AdS_5 x S^5 background that interpolates between pulsating strings and single-spike strings. They are obtained from the helical strings of hep-th/0609026 by interchanging worldsheet time and space coordinates, which maps rotating/spinning string states with large spins to oscillating states with large winding numbers. From a finite-gap perspective, this transformation is realised as an interchange of quasi-momentum and quasi-energy defined for the algebraic curve. The gauge theory duals are also discussed, and are identified with operators in the non-holomorphic sector of N=4 super Yang-Mills. They can be viewed as excited states above the ``antiferromagnetic'' state, which is ``the farthest from BPS'' in the spin-chain spectrum. Furthermore, we investigate helical strings on AdS_3 x S^1 in an appendix.

Hirotaka Hayashi; Keisuke Okamura; Ryo Suzuki; Benoit Vicedo

2007-09-26T23:59:59.000Z

122

Introduction to Small-Scale Wind Energy Systems (Including RETScreen Case  

Open Energy Info (EERE)

Introduction to Small-Scale Wind Energy Systems (Including RETScreen Case Introduction to Small-Scale Wind Energy Systems (Including RETScreen Case Study) (Webinar) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Introduction to Small-Scale Wind Energy Systems (Including RETScreen Case Study) (Webinar) Focus Area: Renewable Energy Topics: System & Application Design Website: www.leonardo-energy.org/webinar-introduction-small-scale-wind-energy-s Equivalent URI: cleanenergysolutions.org/content/introduction-small-scale-wind-energy- Language: English Policies: Deployment Programs DeploymentPrograms: Project Development This video teaches the viewer about wind turbines and RETscreen's wind module, which can be used to project the cost and production of a wind

123

Large-eddy simulation of a wind turbine wake in turbulent  

E-Print Network (OSTI)

Large-eddy simulation of a wind turbine wake in turbulent neutral shear flow Shengbai Xie, Cristina-similar velocity profile existing in the wake after a wind turbine? How does the wake influence the vertical? Motivation #12; Large-eddy simulation for turbulent flow field Actuator-line model for wind turbine ui

Firestone, Jeremy

124

Spatial variation in extreme winds predicts large wildfire locations in chaparral ecosystems  

E-Print Network (OSTI)

Click Here for Full Article Spatial variation in extreme winds predicts large wildfire locations. There is a surprising lack of information about extreme wind patterns worldwide, and more quantitative analyses. Hall (2010), Spatial variation in extreme winds predicts large wildfire locations in chaparral

Wildermuth, Mary C

125

Operational Impacts of Large Deployments of Offshore Wind (Poster)  

SciTech Connect

The potential operational impact of deploying 54 GW of offshore wind in the United States was examined. The capacity was not evenly distributed; instead, it was concentrated in regions with better wind quality and close to load centers (Table 1). A statistical analysis of offshore wind power time series was used to assess the effect on the power system. The behavior of offshore wind resembled that of onshore wind, despite the former presenting higher capacity factors, more consistent power output across seasons, and higher variability levels. Thus, methods developed to manage onshore wind variability can be extended and applied to offshore wind.

Ibanez, E.; Heaney, M.

2014-10-01T23:59:59.000Z

126

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...

127

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

128

MPO 612 -LARGE-SCALE OCEAN CIRCULATION W. JOHNS -SPRING 2010  

E-Print Network (OSTI)

) - Observations of the Deep Circulation - Deep Western Boundary Currents - Role of the Southern Ocean - The Upper-OceanMPO 612 - LARGE-SCALE OCEAN CIRCULATION W. JOHNS - SPRING 2010 The course will cover basic theories of the wind driven and thermohaline circulation of the oceans. Numerical models of ocean circulation

Miami, University of

129

Energy-Efficient Antenna Selection and Power Allocation for Large-Scale Multiple Antenna  

E-Print Network (OSTI)

the BS to harvest energy from renewable energy sources such as solar, wind, and so on, can effectivelyEnergy-Efficient Antenna Selection and Power Allocation for Large-Scale Multiple Antenna Systems with Hybrid Energy Supply Zhenyu Zhou1 , Sheng Zhou2 , Jie Gong2 , and Zhisheng Niu2 1 State Key Laboratory

130

Probabilistic extreme response analysis of large wind turbines to natural winds.  

E-Print Network (OSTI)

??With increases in size and flexibility of modern wind turbines, especially for offshore applications, an improved understanding and assessment of turbine performance under various wind (more)

Gong, Kuangmin

2014-01-01T23:59:59.000Z

131

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

132

On modelling of grouped reliability data for wind turbines  

Science Journals Connector (OSTI)

......generation by wind turbines (WTs) has...large-scale offshore developments...generation by wind turbines (WTs) has...large-scale offshore developments...UK, most wind turbines (WTs) have...likely that offshore WTs will play......

F. P. A. Coolen; F. Spinato; D. Venkat

2010-10-01T23:59:59.000Z

133

Initial Economic Analysis of Utility-Scale Wind Integration in Hawaii  

SciTech Connect

This report summarizes an analysis, conducted by the National Renewable Energy Laboratory (NREL) in May 2010, of the economic characteristics of a particular utility-scale wind configuration project that has been referred to as the 'Big Wind' project.

Not Available

2012-03-01T23:59:59.000Z

134

WINDExchange: Utility-Scale Land-Based 80-Meter Wind Maps  

Wind Powering America (EERE)

Programs & Data Utility-Scale Land-Based 80-Meter Wind Maps The U.S. Department of Energy provides an 80-meter (m) height, high-resolution wind resource map for the United...

135

Conceptual Design of Floating Wind Turbines with Large-Amplitude Motion  

E-Print Network (OSTI)

of spar-type floating offshore wind turbines is investigated in detail. Three conceptual designs based for siting offshore wind turbines beyond sight of land, where waters tend to be deeper, and use of floating importance. The first full-scale offshore floating wind turbine in the world, Hywind, has been installed

Sweetman, Bert

136

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

137

Federal Energy Management Program: Large-scale Renewable Energy Projects  

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

Large-scale Large-scale Renewable Energy Projects (Larger than 10 MWs) to someone by E-mail Share Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Facebook Tweet about Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Twitter Bookmark Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Google Bookmark Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Delicious Rank Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Digg Find More places to share Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on

138

Locations of Smart Grid Demonstration and Large-Scale Energy...  

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

Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Map of the United States...

139

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...

140

Lessons from Large-Scale Renewable Energy Integration Studies...  

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

including 10% post consumer waste. 1 WREF 2012: LESSONS FROM LARGE-SCALE RENEWABLE ENERGY INTEGRATION STUDIES A number of large-scale studies have been conducted in the...

Note: This page contains sample records for the topic "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

Offshore wind energy integration in the European power system.  

E-Print Network (OSTI)

??In Europe there are large plans for offshore wind energy and especially the North Sea region are of interest. This large scale integration of wind (more)

Pea, Juan Julin Peir

2008-01-01T23:59:59.000Z

142

Electric power from offshore wind via synoptic-scale interconnection  

Science Journals Connector (OSTI)

...hub-height of modern offshore wind turbines. Our extrapolation...output of an offshore turbine at each selected station with wind speed measurements...Practical commercial offshore wind developments...minimum of 100 turbines at each location...

Willett Kempton; Felipe M. Pimenta; Dana E. Veron; Brian A. Colle

2010-01-01T23:59:59.000Z

143

Synchronization of coupled large-scale Boolean networks  

SciTech Connect

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

144

Initial Economic Analysis of Utility-scale Wind Integration in...  

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

from OWITSTRC Wind Curtailment (MWhyear) -90,000 Sourced from OWITSTRC Delivered Energy Capacity Factor (%) 42.29% Sourced from OWITSTRC CAPITAL COST FACTORS Wind Farm &...

145

Simulation of large-amplitude motion of floating wind turbines using conservation of momentum  

E-Print Network (OSTI)

Environmental, aesthetic and political pressures continue to push for siting offshore wind turbines beyond sightSimulation of large-amplitude motion of floating wind turbines using conservation of momentum Lei equations of motion (EOMs) of a floating wind turbine system using the theorem of conservation of angular

Sweetman, Bert

146

Floating Offshore Wind Turbine Dynamics: Large-Angle Motions in Euler-Space  

E-Print Network (OSTI)

Floating Offshore Wind Turbine Dynamics: Large-Angle Motions in Euler-Space Bert Sweetman Texas A offshore wind turbines beyond sight of land, where waters tend to be deeper, and use of floating structures wind turbines in deep water, where environmental forcing could subject the rotor to meaningful angular

Sweetman, Bert

147

Opportunities and Challenges to Scaling-up Wind Power in Vietnam | Open  

Open Energy Info (EERE)

Challenges to Scaling-up Wind Power in Vietnam Challenges to Scaling-up Wind Power in Vietnam Jump to: navigation, search Name Opportunities and Challenges to Scaling-up Wind Power in Vietnam Agency/Company /Organization Asian Development Bank Sector Energy Focus Area Renewable Energy, Wind Topics Co-benefits assessment, Market analysis, Pathways analysis, Background analysis, Technology characterizations Resource Type Presentation Website http://www.adb.org/documents/e Country Vietnam UN Region South-Eastern Asia References Vietnam-Wind Power Opportunities and Challenges [1] References ↑ "Vietnam-Wind Power Opportunities and Challenges" Retrieved from "http://en.openei.org/w/index.php?title=Opportunities_and_Challenges_to_Scaling-up_Wind_Power_in_Vietnam&oldid=383401"

148

B61-12 Life Extension Program Undergoes First Full-Scale Wind...  

National Nuclear Security Administration (NNSA)

Undergoes First Full-Scale Wind Tunnel Test | National Nuclear Security Administration People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy...

149

Full-scale modal wind turbine tests: comparing shaker excitation with wind excitation  

Science Journals Connector (OSTI)

The test facilities at the National Wind Technology Center (NWTC) of the National ... control schemes and equipment for reducing loads on wind turbine components. As wind turbines become lighter and more flexible...

Richard Osgood; Gunjit Bir; Heena Mutha

2011-01-01T23:59:59.000Z

150

Nesting large-eddy simulations within mesoscale simulations for wind energy applications  

SciTech Connect

With increasing demand for more accurate atmospheric simulations for wind turbine micrositing, for operational wind power forecasting, and for more reliable turbine design, simulations of atmospheric flow with resolution of tens of meters or higher are required. These time-dependent large-eddy simulations (LES), which resolve individual atmospheric eddies on length scales smaller than turbine blades and account for complex terrain, are possible with a range of commercial and open-source software, including the Weather Research and Forecasting (WRF) model. In addition to 'local' sources of turbulence within an LES domain, changing weather conditions outside the domain can also affect flow, suggesting that a mesoscale model provide boundary conditions to the large-eddy simulations. Nesting a large-eddy simulation within a mesoscale model requires nuanced representations of turbulence. Our group has improved the Weather and Research Forecasting model's (WRF) LES capability by implementing the Nonlinear Backscatter and Anisotropy (NBA) subfilter stress model following Kosovic (1997) and an explicit filtering and reconstruction technique to compute the Resolvable Subfilter-Scale (RSFS) stresses (following Chow et al, 2005). We have also implemented an immersed boundary method (IBM) in WRF to accommodate complex terrain. These new models improve WRF's LES capabilities over complex terrain and in stable atmospheric conditions. We demonstrate approaches to nesting LES within a mesoscale simulation for farms of wind turbines in hilly regions. Results are sensitive to the nesting method, indicating that care must be taken to provide appropriate boundary conditions, and to allow adequate spin-up of turbulence in the LES domain.

Lundquist, J K; Mirocha, J D; Chow, F K; Kosovic, B; Lundquist, K A

2008-09-08T23:59:59.000Z

151

Global and multi-scale features of solar wind-magnetosphere coupling: From modeling to forecasting  

E-Print Network (OSTI)

and substorms; 2784 Magnetospheric Physics: Solar wind/magnetosphere interactions; 3210 Mathematical Geophysics in the solar wind-magnetosphere interaction, de- veloping first principles models that encompass allGlobal and multi-scale features of solar wind-magnetosphere coupling: From modeling to forecasting

Sitnov, Mikhail I.

152

New England Wind Forum: Wind Power Economics  

Wind Powering America (EERE)

State Activities Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics Cost Components Determining Factors Influencing Wind Economics in New England How does wind compare to the cost of other electricity options? Markets Siting Policy Technical Challenges Issues Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share Wind Power Economics Long-Term Cost Trends Since the first major installations of commercial-scale wind turbines in the 1980s, the cost of energy from wind power projects has decreased substantially due to larger turbine generators, towers, and rotor lengths; scale economies associated with larger projects; improvements in manufacturing efficiency, and technological advances in turbine generator and blade design. These technological advances have allowed for higher generating capacities per turbine and more efficient capture of wind, especially at lower wind speeds.

153

Life Cycle Greenhouse Gas Emissions of Utility-Scale Wind Power: Systematic Review and Harmonization  

SciTech Connect

A systematic review and harmonization of life cycle assessment (LCA) literature of utility-scale wind power systems was performed to determine the causes of and, where possible, reduce variability in estimates of life cycle greenhouse gas (GHG) emissions. Screening of approximately 240 LCAs of onshore and offshore systems yielded 72 references meeting minimum thresholds for quality, transparency, and relevance. Of those, 49 references provided 126 estimates of life cycle GHG emissions. Published estimates ranged from 1.7 to 81 grams CO{sub 2}-equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh), with median and interquartile range (IQR) both at 12 g CO{sub 2}-eq/kWh. After adjusting the published estimates to use consistent gross system boundaries and values for several important system parameters, the total range was reduced by 47% to 3.0 to 45 g CO{sub 2}-eq/kWh and the IQR was reduced by 14% to 10 g CO{sub 2}-eq/kWh, while the median remained relatively constant (11 g CO{sub 2}-eq/kWh). Harmonization of capacity factor resulted in the largest reduction in variability in life cycle GHG emission estimates. This study concludes that the large number of previously published life cycle GHG emission estimates of wind power systems and their tight distribution suggest that new process-based LCAs of similar wind turbine technologies are unlikely to differ greatly. However, additional consequential LCAs would enhance the understanding of true life cycle GHG emissions of wind power (e.g., changes to other generators operations when wind electricity is added to the grid), although even those are unlikely to fundamentally change the comparison of wind to other electricity generation sources.

Dolan, S. L.; Heath, G. A.

2012-04-01T23:59:59.000Z

154

Multi-scale Analysis of Large Distributed Computing Systems  

E-Print Network (OSTI)

Multi-scale Analysis of Large Distributed Computing Systems Lucas Mello Schnorr INRIA MESCAL, CNRS-scale distributed systems, Performance visualization analysis, Resource usage anomalies, Volunteer computing, Triva.Vincent@imag.fr ABSTRACT Large scale distributed systems are composed of many thou- sands of computing units. Today

Paris-Sud XI, Université de

155

Large scale prediction models and algorithms  

E-Print Network (OSTI)

Over 90% of the data available across the world has been produced over the last two years, and the trend is increasing. It has therefore become paramount to develop algorithms which are able to scale to very high dimensions. ...

Monsch, Matthieu (Matthieu Frederic)

2013-01-01T23:59:59.000Z

156

Large scale transient expression with COS cells  

Science Journals Connector (OSTI)

We demonstrate here that transient expression with COS cells can be performed at the one litre scale for a period of more than 10 days. Cells grown in T225 flasks were transfected by electroporation, transferr...

Horst D. Blasey; Jean-Pierre Aubry; Gonzalo J. Mazzei; Alain R. Bernard

157

Hydranet: network support for scaling of large scale servic es  

E-Print Network (OSTI)

With the explosive growth of demand for services on the Internet, the networking infrastructure (routers 7 protocols, servers) is under considerable stress. Mechanisms are needed for current and future IP services to scale in a client transparent...

Chawla, Hamesh

1998-01-01T23:59:59.000Z

158

DeWind GmbH | Open Energy Information  

Open Energy Info (EERE)

DeWind GmbH Place: Lubeck, Germany Zip: D - 23569 Sector: Wind energy Product: Germany-based large scale wind turbine manufacturer. References: DeWind GmbH1 This article is a...

159

Paper BL3.199 EWEC 2007 Wind Energy Conference and Exhibition BL3.199 Wake Modelling for intermediate and large wind farms  

E-Print Network (OSTI)

Paper BL3.199 EWEC 2007 Wind Energy Conference and Exhibition 1 BL3.199 Wake Modelling for intermediate and large wind farms Ole Rathmann1, 3 , Sten Frandsen1 , and Rebecca Barthelmie2, 1 1 Wind Energy to after the rotor) AT . #12;Paper BL3.199 EWEC 2007 Wind Energy Conference and Exhibition 2 Figure 1

160

A Linear Scaling Three Dimensional Fragment Method for Large Scale Electronic Structure Calculations  

E-Print Network (OSTI)

large scale electronic structure calculations Lin-Wang Wang,total energy electronic structure calculation method, which

Wang, Lin-Wang; Zhao, Zhengji; Meza, Juan

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

A Linear Scaling Three Dimensional Fragment Method for Large Scale Electronic Structure Calculations  

E-Print Network (OSTI)

large scale electronic structure calculations Lin-Wang Wang,total energy electronic structure calculation method, which

Wang, Lin-Wang

2010-01-01T23:59:59.000Z

162

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

163

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

164

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

E-Print Network (OSTI)

Large-Scale Linear Programming Techniques for the Design of Protein Folding Potentials. Michael Wagner (mwagner ***at*** odu.edu) Jaroslaw Meller (jmeller

Michael Wagner

165

Large Scale Computing and Storage Requirements for Nuclear Physics  

NLE Websites -- All DOE Office Websites (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:...

166

Microsoft Word - Vit Plant Large Scale Testing_20110901.doc  

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

Sept. 1, 2011 Hanford Waste Treatment Plant awards large-scale testing subcontract to local engineering firm Testing will enable project to finalize safe mixing design MEDIA...

167

Large Scale GSHP as Alternative Energy for American Farmers  

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

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,...

168

Auxiliary basis expansions for large-scale electronic structure calculations  

E-Print Network (OSTI)

large-scale electronic structure calculations. Yousung Jungcost of electronic structure calculations is to employIntroduction. Electronic structure calculations are normally

Jung, Yousung; Sodt, Alexander; Gill, Peter W.M.; Head-Gordon, Martin

2005-01-01T23:59:59.000Z

169

Coupled fluid-structure interaction simulation of floating offshore wind turbines and waves: a large eddy simulation approach  

Science Journals Connector (OSTI)

We develop a computational framework for simulating the coupled interaction of complex floating structures with large-scale ocean waves and atmospheric turbulent winds. The near-field approach features a partitioned fluid-structure interaction model (FSI) combining the curvilinear immersed boundary (CURVIB) method of Borazjani and Sotiropoulos (J. Comput. Phys. 2008) and the two-phase flow level set formulation of Kang and Sotiropoulos (Adv. in Water Res. 2012) and is capable of solving complex free-surface flows interacting non-linearly with complex real life floating structures. The near-field solver is coupled with a large-scale wave and wind model based on the two-fluid approach of Yang and Shen (J. Comput. Phys. 2011) which integrates a viscous Navier-Stokes solver with undulatory boundaries for the motion of the air and an efficient potential-flow based wave solver. The large-scale turbulent wind is incorporated from the far-field solver to the near-field solver by feeding into the latter inlet boundary conditions. The wave field is incorporated to the near-field solver by using the pressure-forcing method of Guo and Shen (J. Comput. Phys. 2009) which has been appropriately adapted to the level set method. The algorithm for coupling the two codes has been validated for a variety of wave cases including a broadband spectrum showing excellent agreement when compared to theoretical results. Finally, the capabilities of the numerical framework are demonstrated by carrying out large eddy simulation (LES) of a floating wind turbine interacting with realistic ocean wind and wave conditions.

Antoni Calderer; Xin Guo; Lian Shen; Fotis Sotiropoulos

2014-01-01T23:59:59.000Z

170

Wind load prediction methodologies and application to full scale wind data.  

E-Print Network (OSTI)

??The wind-induced damage to the low-rise buildings in the United States and other countries in this world is considerable. For the wind damage deduction, a (more)

Zhou, Nan

2005-01-01T23:59:59.000Z

171

How Do Distributed Wind Energy Systems Work? (Text Version) ...  

Energy Savers (EERE)

farms, schools, and businesses. LEARN MORE. Utility-Scale Wind A group of large wind turbines in the same location used to produce electricity. Utility-scale wind farms are...

172

Electric grid dependence on the configuration of a small-scale wind and solar power hybrid system  

Science Journals Connector (OSTI)

Results are presented from the modeling of a small-scale distributed power system containing power demands, photovoltaic arrays, small-scale wind turbines and an electric grid connection. Detailed models of the photovoltaic array and the wind turbine are briefly explained in addition to the solar and wind recourse models. A subunit is defined to consist of a power demand together with power contributors. It is shown how the grid dependency (or renewable energy contribution) is affected by the connection of subunits and according to the relationship between the power demand patterns and renewable resource patterns. The outcome from several case studies is presented using simulated power demands and renewable resources. In a scenario with subunit power demands characteristic for a large household and a small factory, it is shown that the coupling of subunits reduces annual grid power transfers by more than 10% and increases the renewable power contribution to the demand by almost 7%.

M. Mikati; M. Santos; C. Armenta

2013-01-01T23:59:59.000Z

173

Characterizing Inflow Conditions Across the Rotor Disk of a Utility-Scale Wind Turbine (Poster)  

SciTech Connect

Multi-megawatt utility-scale wind turbines operate in a turbulent, thermally-driven atmosphere where wind speed and air temperature vary with height. Turbines convert the wind's momentum into electrical power, and so changes in the atmosphere across the rotor disk influence the power produced by the turbine. To characterize the inflow into utility scale turbines at the National Wind Technology Center (NWTC) near Boulder, Colorado, NREL recently built two 135-meter inflow monitoring towers. This poster introduces the towers and the measurements that are made, showing some of the data obtained in the first few months of operation in 2011.

Clifton, A.; Lundquist, J. K.; Kelley, N.; Scott, G.; Jager, D.; Schreck, S.

2012-01-01T23:59:59.000Z

174

Ethics, Logs and Videotape: Ethics in Large Scale User Trials  

E-Print Network (OSTI)

Ethics, Logs and Videotape: Ethics in Large Scale User Trials and User Generated Content Abstract ethical responsibilities we have towards participants. This workshop brings together researchers to discuss the ethical issues of running large-scale user trials, and to provide guidance for future research

Paris-Sud XI, Université de

175

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

176

MEMORY MANAGEMENT FOR LARGE-SCALE NUMA MULTIPROCESSORS  

E-Print Network (OSTI)

MEMORY MANAGEMENT FOR LARGE-SCALE NUMA MULTIPROCESSORS Thomas J. LeBlanc Brian D. Marsh Michael L@cs.rochester.edu marsh@cs.rochester.edu scott@cs.rochester.edu March 1989 Abstract Large-scale shared-memory multiprocessors such as the BBN Butterfly and IBM RP3 Introduce a new level In the memory hierarchy: multiple

Scott, Michael L.

177

Are global wind power resource estimates overstated?  

Science Journals Connector (OSTI)

Estimates of the global wind power resource over land range from 56 to 400TW. Most estimates have implicitly assumed that extraction of wind energy does not alter large-scale winds enough to significantly limit wind power production. Estimates that ignore the effect of wind turbine drag on local winds have assumed that wind power production of 24Wm?2 can be sustained over large areas. New results from a mesoscale model suggest that wind power production is limited to about 1Wm?2 at wind farm scales larger than about 100km2. We find that the mesoscale model results are quantitatively consistent with results from global models that simulated the climate response to much larger wind power capacities. Wind resource estimates that ignore the effect of wind turbines in slowing large-scale winds may therefore substantially overestimate the wind power resource.

Amanda S Adams; David W Keith

2013-01-01T23:59:59.000Z

178

Sandia National Laboratories: Scaled Wind Farm Technology (SWIFT...  

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

wakes denoted by white helices and white fog. Development of the SWIFT Facility wind turbines reached a critical milestone this week, with the successful ground testing of the...

179

Sandia National Laboratories: Scaled Wind Farm Technologies Facility  

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

Doppler Velocimeter EC Top Publications A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study Nonlinear Time-Domain...

180

Large Scale Weather Control Using Nuclear Reactors  

E-Print Network (OSTI)

It is pointed out that controlled release of thermal energy from fission type nuclear reactors can be used to alter weather patterns over significantly large geographical regions. (1) Nuclear heat creates a low pressure region, which can be used to draw moist air from oceans, onto deserts. (2) Creation of low pressure zones over oceans using Nuclear heat can lead to Controlled Cyclone Creation (CCC).(3) Nuclear heat can also be used to melt glaciers and control water flow in rivers.

Moninder Singh Modgil

2002-10-02T23:59:59.000Z

Note: This page contains sample records for the topic "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

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

182

Large-Scale Hydropower Basics | Department of Energy  

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

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

183

Large-Scale Hydropower Basics | Department of Energy  

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

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

184

Goethite Bench-scale and Large-scale Preparation Tests  

SciTech Connect

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

185

Large scale inhomogeneity and local dynamical friction  

E-Print Network (OSTI)

We investigate the effect of a density gradient on Chandrasekhar's dynamical friction formula based on the method of 2-body encounters in the local approximation. We apply these generalizations to the orbit evolution of satellite galaxies in Dark Matter haloes. We find from the analysis that the main influence occurs through a position-dependent maximum impact parameter in the Coulomb logarithm, which is determined by the local scale-length of the density distribution. We also show that for eccentric orbits the explicit dependence of the Coulomb logarithm on position yields significant differences for the standard homogeneous force. Including the velocity dependence of the Coulomb logarithm yields ambigous results. The orbital fits in the first few periods are further improved, but the deviations at later times are much larger. The additional force induced by the density gradient, the inhomogeneous force, is not antiparallel to the satellite motion and can exceed 10% of the homogeneous friction force in magnitude. However, due to the symmetry properties of the inhomogeneous force, there is a deformation and no secular effect on the orbit at the first order. Therefore the inhomogeneous force can be safely neglected for the orbital evolution of satellite galaxies. For the homogeneous force we compare numerical N-body calculations with semi-analytical orbits to determine quantitatively the accuracy of the generalized formulae of the Coulomb logarithm in the Chandresekhar approach. With the local scale-length as the maximum impact parameter we find a significant improvement of the orbital fits and a better interpretation of the quantitative value of the Coulomb logarithm.

A. Just; J. Penarrubia

2004-10-29T23:59:59.000Z

186

Total Cost Per MwH for all common large scale power generation sources |  

Open Energy Info (EERE)

Total Cost Per MwH for all common large scale power generation sources Total Cost Per MwH for all common large scale power generation sources Home > Groups > DOE Wind Vision Community In the US DOEnergy, are there calcuations for real cost of energy considering the negative, socialized costs of all commercial large scale power generation soruces ? I am talking about the cost of mountain top removal for coal mined that way, the trip to the power plant, the sludge pond or ash heap, the cost of the gas out of the stack, toxificaiton of the lakes and streams, plant decommision costs. For nuclear yiou are talking about managing the waste in perpetuity. The plant decomission costs and so on. What I am tring to get at is the 'real cost' per MWh or KWh for the various sources ? I suspect that the costs commonly quoted for fossil fuels and nucelar are

187

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations  

E-Print Network (OSTI)

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations Lin-Wang Wang-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors

Bailey, David H.

188

System integration of large scale offshore wind power.  

E-Print Network (OSTI)

??Electricity generation, along with motor vehicles, is one of the biggest sources of pollution for the planet. Renewable energies are not able to replace massively (more)

Verez, Guillaume

2011-01-01T23:59:59.000Z

189

Superconducting materials for large scale applications  

SciTech Connect

Significant improvements in the properties ofsuperconducting materials have occurred recently. These improvements arebeing incorporated into the latest generation of wires, cables, and tapesthat are being used in a broad range of prototype devices. These devicesinclude new, high field accelerator and NMR magnets, magnets for fusionpower experiments, motors, generators, and power transmission lines.These prototype magnets are joining a wide array of existing applicationsthat utilize the unique capabilities of superconducting magnets:accelerators such as the Large Hadron Collider, fusion experiments suchas ITER, 930 MHz NMR, and 4 Tesla MRI. In addition, promising newmaterials such as MgB2 have been discovered and are being studied inorder to assess their potential for new applications. In this paper, wewill review the key developments that are leading to these newapplications for superconducting materials. In some cases, the key factoris improved understanding or development of materials with significantlyimproved properties. An example of the former is the development of Nb3Snfor use in high field magnets for accelerators. In other cases, thedevelopment is being driven by the application. The aggressive effort todevelop HTS tapes is being driven primarily by the need for materialsthat can operate at temperatures of 50 K and higher. The implications ofthese two drivers for further developments will be discussed. Finally, wewill discuss the areas where further improvements are needed in order fornew applications to be realized.

Scanlan, Ronald M.; Malozemoff, Alexis P.; Larbalestier, David C.

2004-05-06T23:59:59.000Z

190

DOE Completes Large-Scale Carbon Sequestration Project Awards | Department  

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

Completes Large-Scale Carbon Sequestration Project Awards Completes Large-Scale Carbon Sequestration Project Awards DOE Completes Large-Scale Carbon Sequestration Project Awards November 17, 2008 - 4:58pm Addthis Regional Partner to Demonstrate Safe and Permanent Storage of 2 Million Tons of CO2 at Wyoming Site WASHINGTON, DC - Completing a series of awards through its Regional Carbon Sequestration Partnership Program, the U.S. Department of Energy (DOE) today awarded $66.9 million to the Big Sky Regional Carbon Sequestration Partnership for the Department's seventh large-scale carbon sequestration project. Led by Montana State University-Bozeman, the Partnership will conduct a large-volume test in the Nugget Sandstone formation to demonstrate the ability of a geologic formation to safely, permanently and economically

191

DOE Completes Large-Scale Carbon Sequestration Project Awards | Department  

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

DOE Completes Large-Scale Carbon Sequestration Project Awards DOE Completes Large-Scale Carbon Sequestration Project Awards DOE Completes Large-Scale Carbon Sequestration Project Awards November 17, 2008 - 4:58pm Addthis Regional Partner to Demonstrate Safe and Permanent Storage of 2 Million Tons of CO2 at Wyoming Site WASHINGTON, DC - Completing a series of awards through its Regional Carbon Sequestration Partnership Program, the U.S. Department of Energy (DOE) today awarded $66.9 million to the Big Sky Regional Carbon Sequestration Partnership for the Department's seventh large-scale carbon sequestration project. Led by Montana State University-Bozeman, the Partnership will conduct a large-volume test in the Nugget Sandstone formation to demonstrate the ability of a geologic formation to safely, permanently and economically

192

Large Eddy Simulation of the Wind Field and Pollution Dispersion in Building Array  

Science Journals Connector (OSTI)

The air quality is one of the significant issues in sustainable development of modern city. In the paperthe Large Eddy Simulation (LES) is used to predict the wind field and pollution dispersion in residence dist...

R. F. Shi; G. X. Cui; C. X. Xu; Z. S. Zhang

2009-01-01T23:59:59.000Z

193

Large Eddy Simulation of Wind Turbulence forAppropriate Urban Environment  

Science Journals Connector (OSTI)

This study shows the numerical model which has the actual shape of the urban surface in order to analyze the wind turbulence in a city by large eddy simulation (LES) technique. Predictive accuracy of LES ... haza...

Tetsuro Tamura

2010-01-01T23:59:59.000Z

194

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

195

A Minnesota Blizzard Provides Insight into Utility-Scale Wind...  

Energy Savers (EERE)

Wakes September 12, 2014 - 11:22am Addthis A blurry, black and white photo of wind turbines in a blizzard. Jiarong Hong can hardly wait for Minnesota's harsh winters to...

196

Economic Development from Gigawatt-Scale Wind Deployment in Wyoming (Presentation)  

SciTech Connect

This presentation provides an overview of economic development in Wyoming from gigawatt-scale wind development and includes a discussion of project context, definitions and caveats, a deployment scenario, modeling inputs, results, and conclusions.

Lantz, E.

2011-05-23T23:59:59.000Z

197

Regional and local scale characteristics of foehn wind events over the South Island of New Zealand  

Science Journals Connector (OSTI)

Regional and local scale windfield and air mass characteristics during two distinct synoptic foehn wind events over southern New Zealand are examined. ... the Southern Alps at Lake Tekapo, classic foehn condition...

H. A. McGowan; A. P. Sturman

1996-01-01T23:59:59.000Z

198

Full scale experimental analysis of extreme coherent gust with wind direction changes (EOD)  

Science Journals Connector (OSTI)

A coherent wind speed and wind direction change (ECD) load case is defined in the wind turbine standard. This load case is an essential extreme load case that e.g. may be design driving for flap defection of active stall controlled wind turbines. The present analysis identifies statistically the magnitudes of a joint gust event defined by a simultaneously wind speed- and direction change in order to obtain an indication of the validity of the magnitudes specified in the IEC code. The analysis relates to pre-specified recurrence periods and is based on full-scale wind field measurements. The wind speed gust amplitude, occurring simultaneously with a wind direction change, corresponds well to the recommended ECD value of 15 m/s, except for the complex terrain case, where estimated extreme wind speed gust amplitudes are seen to exceed the IEC value with approximately 50%. The estimated extreme wind direction gust amplitudes associated with the investigated European sites are low compared to the recommended IEC- values. However, these values, as function of the mean wind speed, are difficult to validate thoroughly due to the limited number of fully correlated measurements.

K S Hansen; G C Larsen

2007-01-01T23:59:59.000Z

199

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

200

The Linearly Scaling 3D Fragment Method for Large Scale Electronic Structure Calculations  

E-Print Network (OSTI)

large scale electronic structure calculations Zhengji Zhaoin [8]. 3. Electronic structure calculations for asymmetricd) initio electronic structure Pure CdS calculations. This

Zhao, Zhengji

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

New England Wind Forum: New England Wind Projects  

Wind Powering America (EERE)

Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics Markets Siting Policy Technical Challenges Issues Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share New England Wind Projects This page shows the location of installed and planned New England wind projects. Find windfarms, community-scale wind projects, customer-sited wind projects, small wind projects, and offshore wind projects. Read more information about how to use the Google Map and how to add your wind project to the map. Text version New England Wind Energy Projects Connecticut, East Canaan Wind Connecticut, Klug Farm Connecticut, Phoenix Press Connecticut, Wind Colebrook (South and North)

202

Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction |  

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

Large-Scale Industrial Carbon Capture, Storage Plant Begins Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction August 24, 2011 - 1:00pm Addthis Washington, DC - Construction activities have begun at an Illinois ethanol plant that will demonstrate carbon capture and storage. The project, sponsored by the U.S. Department of Energy's Office of Fossil Energy, is the first large-scale integrated carbon capture and storage (CCS) demonstration project funded by the American Recovery and Reinvestment Act (ARRA) to move into the construction phase. Led by the Archer Daniels Midland Company (ADM), a member of DOE's Midwest Geological Sequestration Consortium, the Illinois-ICCS project is designed to sequester approximately 2,500 metric tons of carbon dioxide

203

Energy Department Applauds Nation's First Large-Scale Industrial Carbon  

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

Nation's First Large-Scale Industrial Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility August 24, 2011 - 6:23pm Addthis Washington, D.C. - The U.S. Department of Energy issued the following statement in support of today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009 economic stimulus legislation - the American Recovery and Reinvestment Act - the ambitious project will capture and store one million tons of carbon dioxide (CO2) per year produced as the result of processing corn into fuel-grade ethanol from the nearby Archer Daniels Midland biofuels plant. Since all of

204

ARM - Evaluation Product - Vertical Air Motion during Large-Scale  

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

ProductsVertical Air Motion during Large-Scale ProductsVertical Air Motion during Large-Scale Stratiform Rain Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Vertical Air Motion during Large-Scale Stratiform Rain Site(s) NIM SGP General Description The Vertical Air Motion during Large-Scale Stratiform Rain (VERVELSR) value-added product (VAP) uses the unique properties of a 95-GHz radar Doppler velocity spectra to produce vertical profiles of air motion during low-to-moderate (1-20 mm/hr) rainfall events It is designed to run at ARM sites that include a W-band ARM cloud radar (WACR) radar with spectra data processing. The VERVELSR VAP, based on the work of Giangrande et al. (2010), operates by exploiting a resonance effect that occurs in

205

Energy Department Applauds Nation's First Large-Scale Industrial Carbon  

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

Energy Department Applauds Nation's First Large-Scale Industrial Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility August 24, 2011 - 6:23pm Addthis Washington, D.C. - The U.S. Department of Energy issued the following statement in support of today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009 economic stimulus legislation - the American Recovery and Reinvestment Act - the ambitious project will capture and store one million tons of carbon dioxide (CO2) per year produced as the result of processing corn into fuel-grade ethanol from the nearby Archer Daniels Midland biofuels plant. Since all of

206

Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction |  

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

Large-Scale Industrial Carbon Capture, Storage Plant Begins Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction August 24, 2011 - 1:00pm Addthis Washington, DC - Construction activities have begun at an Illinois ethanol plant that will demonstrate carbon capture and storage. The project, sponsored by the U.S. Department of Energy's Office of Fossil Energy, is the first large-scale integrated carbon capture and storage (CCS) demonstration project funded by the American Recovery and Reinvestment Act (ARRA) to move into the construction phase. Led by the Archer Daniels Midland Company (ADM), a member of DOE's Midwest Geological Sequestration Consortium, the Illinois-ICCS project is designed to sequester approximately 2,500 metric tons of carbon dioxide

207

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...

208

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.

209

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

210

Large-Scale Industrial CCS Projects Selected for Continued Testing |  

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

Large-Scale Industrial CCS Projects Selected for Continued Testing Large-Scale Industrial CCS Projects Selected for Continued Testing Large-Scale Industrial CCS Projects Selected for Continued Testing June 10, 2010 - 1:00pm Addthis Washington, DC - Three Recovery Act funded projects have been selected by the U.S. Department of Energy (DOE) to continue testing large-scale carbon capture and storage (CCS) from industrial sources. The projects - located in Texas, Illinois, and Louisiana - were initially selected for funding in October 2009 as part of a $1.4 billion effort to capture carbon dioxide (CO2) from industrial sources for storage or beneficial use. The first phase of research and development (R&D) included $21.6 million in Recovery Act funding and $22.5 million in private funding for a total initial investment of $44.1 million.

211

DOE Awards First Three Large-Scale Carbon Sequestration Projects |  

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

First Three Large-Scale Carbon Sequestration Projects First Three Large-Scale Carbon Sequestration Projects DOE Awards First Three Large-Scale Carbon Sequestration Projects October 9, 2007 - 3:14pm Addthis U.S. Projects Total $318 Million and Further President Bush's Initiatives to Advance Clean Energy Technologies to Confront Climate Change WASHINGTON, DC - In a major step forward for demonstrating the promise of clean energy technology, U.S Deputy Secretary of Energy Clay Sell today announced that the Department of Energy (DOE) awarded the first three large-scale carbon sequestration projects in the United States and the largest single set in the world to date. The three projects - Plains Carbon Dioxide Reduction Partnership; Southeast Regional Carbon Sequestration Partnership; and Southwest Regional Partnership for Carbon

212

Constraints on gravity on cosmic scales with upcoming large-scale structure surveys  

Science Journals Connector (OSTI)

...acceleration: large-scale structure surveys, such as Dark Energy Survey, the Large Synoptic Survey Telescope...modified gravity models. We consider the survey's ability to constrain dark energy EoS and modified gravity parameters by...

2011-01-01T23:59:59.000Z

213

Lessons from Large-Scale Renewable Energy Integration Studies: Preprint  

SciTech Connect

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

214

Opportunistic Evolution: Efficient Evolutionary Computation on Large-Scale  

E-Print Network (OSTI)

Opportunistic Evolution: Efficient Evolutionary Computation on Large-Scale Computational Grids evaluation designed for deployment of evo- lutionary computation to very large grid computing ar- chitectures evolutionary com- putation toolkit to a commercial Java-based grid comput- ing platform known as Frontier

Luke, Sean

215

Opportunistic Evolution: Efficient Evolutionary Computation on Large-Scale  

E-Print Network (OSTI)

Opportunistic Evolution: Efficient Evolutionary Computation on Large-Scale Computational Grids evaluation designed for deployment of evo- lutionary computation to very large grid computing ar- chitectures evolutionary computa- tion toolkit to a commercial Java-based grid computing plat- form known as Frontier

George Mason University

216

Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F. Manwell,  

E-Print Network (OSTI)

Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F utility scale wind turbines on Fox Islands, located 12 miles from the coast of Maine in the United States of electricity itself. Three locations are analyzed in detail as potential sites for wind turbine installations

Massachusetts at Amherst, University of

217

Clamp for use in winding large magnet coils  

DOE Patents (OSTI)

In one aspect, the invention is a novel arrangement for applying forces to urns of a vertically extending helical coil which is wound about a support. The apparatus includes a first rigid member extending towards the turns. A second rigid member extends transversely from the end of the first and has a vertically extending face provided with a generally straight groove extending transversely of the turns. A longitudinal passage in the first member connects to the groove to form therewith a continuous guideway for rollable articles. A rigid lug longitudinally movable in the groove is provided with a projection which extends out of the groove and beneath the bottom of a selected turn of the coil. A train of rigid, rollable articles is disposed in the guideway inwardly of the lug. Means are provided for applying force to that end of the train which is relatively remote from the lug, to urge the latter against the bottom face of the selected turn. As a result, that turn is moved upward along the face of the support, establishing a selected spacing between that turn and the previously formed turn of the coil. When upward movement of the selected turn stops, the force applied to the lug immediately translates to a force which urges the above-mentioned grooved face against all of the formed turns, thus compressing them against the support. The above-mentioned first and second members are swingably mounted so that they can be temporarily moved out of the winding path, thus permitting continuous winding.

Brown, Robert L. (Kingston, TN); Kenney, Walter J. (Clinton, TN)

1983-01-01T23:59:59.000Z

218

Clamp for use in winding large magnet coils  

DOE Patents (OSTI)

In one aspect, the invention is a novel arrangement for applying forces to turns of a vertically extending helical coil which is wound about a support. The apparatus includes a first rigid member extending towards the turns. A second rigid member extends transversely from the end of the first and has a vertically extending face provided with a generally straight groove extending transversely of the turns. A longitudinal passage in the first member connects to the groove to form therewith a continuous guideway for rollable articles. A rigid lug longitudinally movable in the groove is provided with a projection which extends out of the groove and beneath the bottom of a selected turn of the coil. A train of rigid, rollable articles is disposed in the guideway inwardly of the lug. Means are provided for applying force to that end of the train which is relatively remote from the lug, to urge the latter against the bottom face of the selected turn. As a result, that turn is moved upward along the face of the support, establishing a selected spacing between that turn and the previously formed turn of the coil. When upward movement of the selected turn stops, the force applied to the lug immediately translates to a force which urges the above-mentioned grooved face against all of the formed turns, thus compressing them against the support. The above-mentioned first and second members are swingably mounted so that they can be temporarily moved out of the winding path, thus permitting continuous winding.

Brown, R.L.; Kenney, W.J.

1981-05-05T23:59:59.000Z

219

Implications of diurnal and seasonal variations in renewable energy generation for large scale energy storage  

Science Journals Connector (OSTI)

Large scale implementation of solar and wind powered renewable electricity generation will use up to continent sized connected electricity grids built to distribute the locally fluctuating power. Systematic power output variation will then become manifest since solar power has an evident diurnal period but also surface windswhich are driven by surface temperaturesfollow a diurnal periodic behavior lagging about 4 h in time. On an ordinary day a strong diurnal varying renewable electricity generation results when combining wind and solar power on such continent sized grid. Comparison with possible demand patterns indicates that coping with such systematically varying generation will require large scale renewable energy storage and conversion for timescales and storage capacities of at least up to half a day. Seasonal timescales for versatile high quality generally applicable energy conversion and storage are equally essential since the continent wide insolation varies a factor ?3 e.g. in Europe and Northern Africa together. A first order model for estimating required energy storage and conversion magnitudes is presented taking into account potential diurnal and seasonal energy demand and generation patterns. A few scalable energy storage methods are briefly indicated.

2014-01-01T23:59:59.000Z

220

Linear Scaling 3D Fragment Method for Large-scale Electronic Structure Calculations  

E-Print Network (OSTI)

Linear Scaling 3D Fragment Method for Large-scale Electronic Structure Calculations Lin-Wang Wang) allocation time in the materials science category [1]. DFT codes can be used to calculate the electronic theory (DFT) calculations for large systems. This method cancels out the artificial boundary effects

Note: This page contains sample records for the topic "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

Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and  

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

Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and Other Large Systems Event Sponsor: Leadership Computing Facility Seminar Start Date: Dec 5 2013 - 2:00pm Building/Room: Building 240/Room 4301 Location: Argonne National Laboratory Speaker(s): Dmitri G. Fedorov Speaker(s) Title: National Institute of Advanced Industrial Science and Technology (AIST) Host: Yuri Alexeev Our approach to large scale calculations is based on fragmenting a molecular system into pieces, and performing quantum-mechanical calculations of these fragments and their pairs in the fragment molecular orbital method (FMO). After a brief summary of the methodology, some typical applications to protein-ligand complexes, chemical reactions in explicit solvent, and nanomaterials (silicon nanowires, zeolites.

222

Prototype Vector Machine for Large Scale Semi-Supervised Learning  

SciTech Connect

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

223

A Novel Aggregation Technique Using Mechanical Torque Compensating Factor for DFIG Wind Farms  

Science Journals Connector (OSTI)

A novel aggregated model for wind farms consisting of wind turbines equipped with doubly fed induction generators (DFIG) is proposed in this paper. In ... a large scale offshore wind farm comprising 72 DFIG wind ...

M. A. Chowdhury

2014-01-01T23:59:59.000Z

224

Electric power from offshore wind via synoptic-scale interconnection  

Science Journals Connector (OSTI)

...from the Atlantic Transmission Grid year-by-year...in the prior wind transmission analysis reviewed...a 5.6% forced outage rate (5). In...in the National Data Buoy Center data...level pressure with lines for hPa, and 10-m...are connected by transmission. The two gray date...

Willett Kempton; Felipe M. Pimenta; Dana E. Veron; Brian A. Colle

2010-01-01T23:59:59.000Z

225

Large Eddy Simulation of Trade Wind Cumulus Clouds  

Science Journals Connector (OSTI)

A large eddy simulation (LES) model, used for studying the dry convective boundary layer, has been extended with an equation for the total water specific humidity and a condensation scheme to simulate the partly cloudy convective boundary layer. ...

J. W. M. Cuijpers; P. G. Duynkerke

1993-12-01T23:59:59.000Z

226

Fluidic: Grid-Scale Batteries for Wind and Solar | Department of Energy  

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

Fluidic: Grid-Scale Batteries for Wind and Solar Fluidic: Grid-Scale Batteries for Wind and Solar Fluidic: Grid-Scale Batteries for Wind and Solar February 27, 2013 - 5:42pm Addthis Andrew Gumbiner Contractor, Advanced Research Projects Agency-Energy. FLUIDIC: Metal Air Recharged from DOE ARPA-E on Vimeo. Our nation's modern electric grid is limited in its ability to store excess energy for on-demand power. As a result, electricity must be generated on a constant basis to perfectly match demand. Grid-scale storage technologies have the potential to shift this dynamic, revolutionizing how our grid uses and distributes energy. Reliable, high-performing storage technologies could provide a considerable amount of power on very short demand, lowering costs to utilities and consumers alike. These powerful technologies would enable renewable sources of energy -

227

COMMENTS OF THE LARGE-SCALE SOLAR ASSOCIATION TO DEPARTMENT  

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

COMMENTS OF THE LARGE-SCALE SOLAR ASSOCIATION TO DEPARTMENT COMMENTS OF THE LARGE-SCALE SOLAR ASSOCIATION TO DEPARTMENT OF ENERGY'S RAPID RESPONSE TEAM FOR TRANSMISSION'S REQUEST FOR INFORMATION Submitted by electronic mail to: Lamont.Jackson@hq.doe.gov The Large-scale Solar Association appreciates this opportunity to respond to the Department of Energy's (DOE) Rapid Response Team for Transmission's (RRTT) Request for Information. 1 We applaud the DOE for creating the RRTT and continuing to advance the efforts already made under the Memorandum of Understanding (MOU) entered into by nine Federal agencies in 2009 to expedite electric transmission construction. We also applaud the federal and state agencies that have expanded the Renewable Energy Policy Group and the Renewable Energy Action Team in California to focus on transmission, and hope that the tremendous

228

Breakthrough Large-Scale Industrial Project Begins Carbon Capture and  

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

Breakthrough Large-Scale Industrial Project Begins Carbon Capture Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization January 25, 2013 - 12:00pm Addthis Washington, DC - A breakthrough carbon capture, utilization, and storage (CCUS) project in Texas has begun capturing carbon dioxide (CO2) and piping it to an oilfield for use in enhanced oil recovery (EOR). Read the project factsheet The project at Air Products and Chemicals hydrogen production facility in Port Arthur, Texas, is significant for demonstrating both the effectiveness and commercial viability of CCUS technology as an option in helping mitigate atmospheric CO2 emissions. Funded in part through the American Recovery and Reinvestment Act (ARRA), the project is managed by the U.S.

229

Breakthrough Large-Scale Industrial Project Begins Carbon Capture and  

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

Breakthrough Large-Scale Industrial Project Begins Carbon Capture Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization January 25, 2013 - 12:00pm Addthis Washington, DC - A breakthrough carbon capture, utilization, and storage (CCUS) project in Texas has begun capturing carbon dioxide (CO2) and piping it to an oilfield for use in enhanced oil recovery (EOR). Read the project factsheet The project at Air Products and Chemicals hydrogen production facility in Port Arthur, Texas, is significant for demonstrating both the effectiveness and commercial viability of CCUS technology as an option in helping mitigate atmospheric CO2 emissions. Funded in part through the American Recovery and Reinvestment Act (ARRA), the project is managed by the U.S.

230

Nevada Weatherizes Large-Scale Complex | Department of Energy  

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

Nevada Weatherizes Large-Scale Complex Nevada Weatherizes Large-Scale Complex Nevada Weatherizes Large-Scale Complex July 1, 2010 - 10:11am Addthis What does this project do? This nonprofit weatherized a 22-unit low-income multifamily complex, reducing the building's duct leakage from 90 percent to just 5 percent. The weatherization program of the Rural Nevada Development Corporation (RNDC) reached a recent success in its eleven counties-wide territory. In June, the nonprofit finished weatherizing a 22-unit low-income multifamily complex, reducing the building's duct leakage from 90 percent to just 5 percent. "That is one big savings and is why I am proud of this project," says Dru Simerson, RNDC Weatherization Manager. RNDC's crew replaced all windows and 17 furnaces and installed floor

231

9 - Large-scale biomass combustion plants: an overview  

Science Journals Connector (OSTI)

Abstract: For a long time biomass was combusted mostly on a small scale. Now the largest biomass boilers are over 500 MWth. This chapter tries to outline the main methods for large-scale biomass combustion. The main boiler types are the grate and bubbling-fluidised bed boilers although circulating-fluidised bed and pulverised firing do play a role. Particular emphasis has been placed on emissions, the effect of fuel quality and operating issues.

S. Caillat; E. Vakkilainen

2013-01-01T23:59:59.000Z

232

Investment Timing and Capacity Choice for Small-Scale Wind PowerUnder Uncertainty  

SciTech Connect

This paper presents a method for evaluation of investments in small-scale wind power under uncertainty. It is assumed that the price of electricity is uncertain and that an owner of a property with wind resources has a deferrable opportunity to invest in one wind power turbine within a capacity range. The model evaluates investment in a set of projects with different capacity. It is assumed that the owner substitutes own electricity load with electricity from the wind mill and sells excess electricity back to the grid on an hourly basis. The problem for the owner is to find the price levels at which it is optimal to invest, and in which capacity to invest. The results suggests it is optimal to wait for significantly higher prices than the net present value break-even. Optimal scale and timing depend on the expected price growth rate and the uncertainty in the future prices.

Fleten, Stein-Erik; Maribu, Karl Magnus

2004-11-28T23:59:59.000Z

233

Chapter 9 - Large-Scale Hydrogen Energy Storage  

Science Journals Connector (OSTI)

Abstract Storage technologies are essential for the integration of fluctuating renewable energies. Large scale storage provides grid stability, which are fundamental for a reliable energy systems and the energy balancing in hours to weeks time ranges to match demand and supply. Our system analysis showed that storage needs are in the two-digit terawatt hour and gigawatt range. Other reports confirm that assessment by stating that by 2040, 40TWh would be required for this application. The present chapter outlines the general components and functions as well as the economics of a large-scale hydrogen energy storage system.

Erik Wolf

2015-01-01T23:59:59.000Z

234

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, Vladimr

2015-01-01T23:59:59.000Z

235

NREL Studies Wind Farm Aerodynamics to Improve Siting (Fact Sheet...  

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

atmosphere contains large-scale turbulence struc- tures that propagate through the wind turbines and wind farms and influence wake motion. Over the course of a day, the wind...

236

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

237

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

238

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

239

Valueadded Mediation in LargeScale Information Systems  

E-Print Network (OSTI)

workflow, and help desks [WiederholdCC:1994]. Other services available over networks include textual, mediating services can be performed by independent entrepreneurs. 1 INTRODUCTION As information systemsValue­added Mediation in Large­Scale Information Systems Gio Wiederhold Computer Science Department

Wiederhold, Gio

240

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

Note: This page contains sample records for the topic "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

Redundancy Control in Large Scale Sensor Networks via Compressive Sensing  

E-Print Network (OSTI)

, China. The authors deployed 100 sensor nodes and 1096 relay nodes to monitor the urban CO2 in a 5000(mRedundancy Control in Large Scale Sensor Networks via Compressive Sensing Liwen Xu1 , Yongcai Wang1, and require high data storage and management costs. To deal with these challenges, compressive sensing (CS

Wang, Yongcai

242

A Large-Scale Deforestation Experiment: Effects of Patch Area  

E-Print Network (OSTI)

A Large-Scale Deforestation Experiment: Effects of Patch Area and Isolation on Amazon Birds Gonçalo,4 Thomas E. Lovejoy1,5 As compared with extensive contiguous areas, small isolated habitat patches lack many species. Some species disappear after isolation; others are rarely found in any small patch

Stouffer, Phil

243

A large-scale exploration of group viewing patterns  

Science Journals Connector (OSTI)

We present a large-scale study of television viewing habits, focusing on how individuals adapt their preferences when consuming content with others. While there has been a great deal of research on modeling individual preferences, there has been considerably ... Keywords: group recommendation, group viewing patterns

Allison J.B. Chaney, Mike Gartrell, Jake M. Hofman, John Guiver, Noam Koenigstein, Pushmeet Kohli, Ulrich Paquet

2014-06-01T23:59:59.000Z

244

Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities (Book), Large-Scale Renewable Energy Guide, Federal Energy Management Program (FEMP)  

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

LARGE-SCALE RENEWABLE ENERGY GUIDE LARGE-SCALE RENEWABLE ENERGY GUIDE Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital Cover photos, clockwise from the top: Installing mirrored parabolic trough collectors - (January 19, 2012) Crews work around the clock installing mirrored parabolic trough collectors, built on site, that will cover 3 square miles at Abengoa's Solana Plant. Solana a 280 megawatt utility scale solar power plant (CSP) under construction in Gila Bend, Arizona, USA. When finished it will generate 280 MW 's of clean, sustainable power serving over 70,000 Arizona homes. Photo by Dennis Schroeder, NREL 20097 Dry Lake Wind Power Project in Arizona; Suzlon S88 wind turbines - The 63-MW Dry Lake Wind Power Project in Arizona is the first

245

Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities (Book), Large-Scale Renewable Energy Guide, Federal Energy Management Program (FEMP)  

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

LARGE-SCALE RENEWABLE ENERGY GUIDE LARGE-SCALE RENEWABLE ENERGY GUIDE Developing Renewable Energy Projects Larger Than 10 MWs at Federal Facilities A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital Cover photos, clockwise from the top: Installing mirrored parabolic trough collectors - (January 19, 2012) Crews work around the clock installing mirrored parabolic trough collectors, built on site, that will cover 3 square miles at Abengoa's Solana Plant. Solana a 280 megawatt utility scale solar power plant (CSP) under construction in Gila Bend, Arizona, USA. When finished it will generate 280 MW 's of clean, sustainable power serving over 70,000 Arizona homes. Photo by Dennis Schroeder, NREL 20097 Dry Lake Wind Power Project in Arizona; Suzlon S88 wind turbines - The 63-MW Dry Lake Wind Power Project in Arizona is the first

246

Abstract--A large share of integrated wind power causes technical and financial impacts on the operation of the existing  

E-Print Network (OSTI)

the future wind power feed-in. But in an efficient market setting, power plant operators will take1 Abstract-- A large share of integrated wind power causes technical and financial impacts behaviour of the wind power generation and of the prediction error. It can be used for the evaluation

247

3D Spectroscopy of Wind Driven Nebulae: The Large Western Knot in the Halo of NGC 6543  

E-Print Network (OSTI)

spectroscopy 1 Introduction The history of stellar mass loss is written in the extended wind-driven nebulae would be required. A candidate for this extra energy source is the fast wind passing the cold3D Spectroscopy of Wind Driven Nebulae: The Large Western Knot in the Halo of NGC 6543 David Mart

Estalella, Robert

248

The Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA)  

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

LBA (Amazon) LBA (Amazon) The Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) Overview [LBA Logo] The Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) is an international research initiative conducted from 1995-2005 and led by Brazil. The LBA Project encompasses several scientific disciplines, or components. The LBA-ECO component focuses on the question: "How do tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in Amazonia?" The Amazon rain forest or Amazonia, is the largest remaining expanse of tropical rain forest on Earth, harboring approximately one-third of all Earth's species. Although the rain forest's area is so large that it

249

Large scale anisotropic bias from primordial non-Gaussianity  

SciTech Connect

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

250

The use of real-time off-site observations as a methodology for increasing forecast skill in prediction of large wind power ramps one or more hours ahead of their impact on a wind plant.  

SciTech Connect

ABSTRACT Application of Real-Time Offsite Measurements in Improved Short-Term Wind Ramp Prediction Skill Improved forecasting performance immediately preceding wind ramp events is of preeminent concern to most wind energy companies, system operators, and balancing authorities. The value of near real-time hub height-level wind data and more general meteorological measurements to short-term wind power forecasting is well understood. For some sites, access to onsite measured wind data - even historical - can reduce forecast error in the short-range to medium-range horizons by as much as 50%. Unfortunately, valuable free-stream wind measurements at tall tower are not typically available at most wind plants, thereby forcing wind forecasters to rely upon wind measurements below hub height and/or turbine nacelle anemometry. Free-stream measurements can be appropriately scaled to hub-height levels, using existing empirically-derived relationships that account for surface roughness and turbulence. But there is large uncertainty in these relationships for a given time of day and state of the boundary layer. Alternatively, forecasts can rely entirely on turbine anemometry measurements, though such measurements are themselves subject to wake effects that are not stationary. The void in free-stream hub-height level measurements of wind can be filled by remote sensing (e.g., sodar, lidar, and radar). However, the expense of such equipment may not be sustainable. There is a growing market for traditional anemometry on tall tower networks, maintained by third parties to the forecasting process (i.e., independent of forecasters and the forecast users). This study examines the value of offsite tall-tower data from the WINDataNOW Technology network for short-horizon wind power predictions at a wind farm in northern Montana. The presentation shall describe successful physical and statistical techniques for its application and the practicality of its application in an operational setting. It shall be demonstrated that when used properly, the real-time offsite measurements materially improve wind ramp capture and prediction statistics, when compared to traditional wind forecasting techniques and to a simple persistence model.

Martin Wilde, Principal Investigator

2012-12-31T23:59:59.000Z

251

Geospatial Optimization of Siting Large-Scale Solar Projects  

SciTech Connect

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

252

NREL's Wind R&D Success Stories, National Wind Technology Center (NWTC) (Fact Sheet)  

SciTech Connect

Wind energy research, development, and deployment have reduced the cost of large and small wind turbine technologies, increased wind energy system reliability and operability, lowered risk by validating performance and design, increased the understanding of the true impacts of wind energy on the U.S. electrical infrastructure, and expanded wind energy markets. A synopsis of research conducted on utility-scale wind turbines, small wind turbines, software, components, market development and grid integration are detailed.

Not Available

2010-01-01T23:59:59.000Z

253

Wind speed forecasting at different time scales: a non parametric approach  

E-Print Network (OSTI)

The prediction of wind speed is one of the most important aspects when dealing with renewable energy. In this paper we show a new nonparametric model, based on semi-Markov chains, to predict wind speed. Particularly we use an indexed semi-Markov model, that reproduces accurately the statistical behavior of wind speed, to forecast wind speed one step ahead for different time scales and for very long time horizon maintaining the goodness of prediction. In order to check the main features of the model we show, as indicator of goodness, the root mean square error between real data and predicted ones and we compare our forecasting results with those of a persistence model.

D'Amico, Guglielmo; Prattico, Flavio

2013-01-01T23:59:59.000Z

254

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. Herv; M. -T. Jaekel; A. Lambrecht; S. Reynaud

2011-05-10T23:59:59.000Z

255

Solar wind energy and momentum from the emergence of new small?scale flux  

Science Journals Connector (OSTI)

Recent Hinode observations have shown the remarkably rapid reconfiguration of the Suns small?scale magnetic flux. On the size?scale of granules solar magnetic flux is reconfigured over only 10 minutes. On the larger scales of supergranules magnetic flux is continually and rapidly reconfigured over about a day. We discuss how the reconfiguration processes observed by Hinode TRACE and SOHO may be related. The emergence of new magnetic flux continually drives reconnection between smaller emerging loops and overlying closed or open fields. Ultimately the energy and momentum from this emerging flux is converted into kinetic energy to drive the solar wind and thermal conductive and radiative energy in closed loops. Thus we describe the relationship between emerging small?scale magnetic flux and the momentum and energy that drives the solar wind and heats the corona.

N. A. Schwadron

2007-01-01T23:59:59.000Z

256

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

257

Large-Scale Renewable Energy Development on Public Lands  

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

Large-Scale Renewable Energy Large-Scale Renewable Energy Development on Public Lands Boyan Kovacic boyan.kovacic@ee.doe.gov 5/2/12 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov * BLM RE Drivers * BLM RE Programs * BLM Permitting and Revenues * Case Studies * Withdrawn Military Land Outline 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov BLM: Bureau of Land Management BO: Biological Opinion CSP: Concentrating Solar Power DOE: Department of Energy DOI: Department of Interior EA: Environmental Assessment EIS: Environmental Impact Statement FONSI: Finding of No Significant Impact FS: U.S. Forrest Service IM: Instruction Memorandum MPDS: Maximum Potential Development Scenario NEPA: National Environmental Policy Act NOI: Notice of Intent NOP: Notice to Proceed

258

Large-Scale Renewable Energy Development on Public Lands  

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

Large-Scale Renewable Energy Large-Scale Renewable Energy Development on Public Lands Boyan Kovacic boyan.kovacic@ee.doe.gov 5/2/12 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov * BLM RE Drivers * BLM RE Programs * BLM Permitting and Revenues * Case Studies * Withdrawn Military Land Outline 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov BLM: Bureau of Land Management BO: Biological Opinion CSP: Concentrating Solar Power DOE: Department of Energy DOI: Department of Interior EA: Environmental Assessment EIS: Environmental Impact Statement FONSI: Finding of No Significant Impact FS: U.S. Forrest Service IM: Instruction Memorandum MPDS: Maximum Potential Development Scenario NEPA: National Environmental Policy Act NOI: Notice of Intent NOP: Notice to Proceed

259

Sharp boundaries of small-and middle-scale solar wind structures  

E-Print Network (OSTI)

Sharp boundaries of small- and middle-scale solar wind structures M. O. Riazantseva1 and G. N Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA P. E. Eiges Space Research Institute, Russian Academy of Sciences, Moscow, Russia Received 7

Richardson, John

260

Wind and Wave Extremes over the World Oceans from Very Large Ensembles  

E-Print Network (OSTI)

Global return values of marine wind speed and significant wave height are estimated from very large aggregates of archived ensemble forecasts at +240-h lead time. Long lead time ensures that the forecasts represent independent draws from the model climate. Compared with ERA-Interim, a reanalysis, the ensemble yields higher return estimates for both wind speed and significant wave height. Confidence intervals are much tighter due to the large size of the dataset. The period (9 yrs) is short enough to be considered stationary even with climate change. Furthermore, the ensemble is large enough for non-parametric 100-yr return estimates to be made from order statistics. These direct return estimates compare well with extreme value estimates outside areas with tropical cyclones. Like any method employing modeled fields, it is sensitive to tail biases in the numerical model, but we find that the biases are moderate outside areas with tropical cyclones.

Breivik, yvind; Abdalla, Saleh; Bidlot, Jean-Raymond; Janssen, Peter A E M

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

Best Practices and Tools for Large-scale Deployment of Renewable Energy and  

Open Energy Info (EERE)

Best Practices and Tools for Large-scale Deployment of Renewable Energy and Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques in ESCWA Agency/Company /Organization: United Nations Economic and Social Commission for Western Asia Focus Area: Energy Efficiency, Renewable Energy, Solar, Wind Topics: Implementation, Policies/deployment programs, Background analysis Resource Type: Lessons learned/best practices Website: www.escwa.un.org/information/publications/edit/upload/sdpd-09-TP3.pdf Country: Bahrain, Egypt, Iraq, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Sudan, Syria, United Arab Emirates, Yemen UN Region: "Western Asia & North Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property.

262

Nuclear-pumped lasers for large-scale applications  

SciTech Connect

Efficient initiation of large-volume chemical lasers may be achieved by neutron induced reactions which produce charged particles in the final state. When a burst mode nuclear reactor is used as the neutron source, both a sufficiently intense neutron flux and a sufficiently short initiation pulse may be possible. Proof-of-principle experiments are planned to demonstrate lasing in a direct nuclear-pumped large-volume system; to study the effects of various neutron absorbing materials on laser performance; to study the effects of long initiation pulse lengths; to demonstrate the performance of large-scale optics and the beam quality that may be obtained; and to assess the performance of alternative designs of burst systems that increase the neutron output and burst repetition rate. 21 refs., 8 figs., 5 tabs.

Anderson, R.E.; Leonard, E.M.; Shea, R.F.; Berggren, R.R.

1989-05-01T23:59:59.000Z

263

Large volume recycling of oceanic lithosphere over short time scales: geochemical constraints from the Caribbean Large  

E-Print Network (OSTI)

Large volume recycling of oceanic lithosphere over short time scales: geochemical constraints from with derivation from recycled oceanic crust, while the depleted lavas are derived from a highly residual source source mantle could have been 9 500 Ma before CLIP formation and interpreted to reflect the recycling

Graham, David W.

264

Atypical Behavior Identification in Large Scale Network Traffic  

SciTech Connect

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

265

Aeroelastic analysis of an offshore wind turbine.  

E-Print Network (OSTI)

?? Aeroelastic design and fatigue analysis of large utility-scale wind turbine blades are performed. The applied fatigue model is based on established methods and is (more)

Fossum, Peter Kalsaas

2012-01-01T23:59:59.000Z

266

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

267

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

268

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

269

Models for Assessing Power Fluctuations from Large Wind Farms N. A. Cutululis1)  

E-Print Network (OSTI)

typical and worst case power fluctuations using the geographical sitting of wind turbines as an input comprehensive, with one year of wind speeds and power from all individual wind turbines in the wind farms of the fluctuating nature of wind speeds, the increasing use of wind turbines for power generation has caused more

270

HTS cables open the window for large-scale renewables  

Science Journals Connector (OSTI)

In a realistic approach to future energy consumption, the effects of sustainable power sources and the effects of growing welfare with increased use of electricity need to be considered. These factors lead to an increased transfer of electric energy over the networks. A dominant part of the energy need will come from expanded large-scale renewable sources. To use them efficiently over Europe, large energy transits between different countries are required. Bottlenecks in the existing infrastructure will be avoided by strengthening the network. For environmental reasons more infrastructure will be built underground. Nuon is studying the HTS technology as a component to solve these challenges. This technology offers a tremendously large power transport capacity as well as the possibility to reduce short circuit currents, making integration of renewables easier. Furthermore, power transport will be possible at lower voltage levels, giving the opportunity to upgrade the existing network while re-using it. This will result in large cost savings while reaching the future energy challenges. In a 6 km backbone structure in Amsterdam Nuon wants to install a 50 kV HTS Triax cable for a significant increase of the transport capacity, while developing its capabilities. Nevertheless several barriers have to be overcome.

A Geschiere; D Willn; E Piga; P Barendregt

2008-01-01T23:59:59.000Z

271

Popularity and Performance: A Large-Scale Study  

E-Print Network (OSTI)

Social scientists have long sought to understand why certain people, items, or options become more popular than others. One seemingly intuitive theory is that inherent value drives popularity. An alternative theory claims that popularity is driven by the rich-get-richer effect of cumulative advantage---certain options become more popular, not because they are higher quality, but because they are already relatively popular. Realistically, it seems likely that popularity is driven by neither one of these forces alone but rather both together. Recently, researchers have begun using large-scale online experiments to study the effect of cumulative advantage in realistic scenarios, but there have been no large-scale studies of the combination of these two effects. We are interested in studying a case where decision-makers observe explicit signals of both the popularity and the quality of various options. We derive a model for change in popularity as a function of past popularity and past perceived quality. Our mode...

Krafft, Peter; Shmueli, Erez; Della Penna, Nicholas; Tenenbaum, Josh; Pentland, Sandy

2014-01-01T23:59:59.000Z

272

Parallel Index and Query for Large Scale Data Analysis  

SciTech Connect

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

273

Large Scale GSHP as Alternative Energy for American Farmers Geothermal  

Open Energy Info (EERE)

GSHP as Alternative Energy for American Farmers Geothermal 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 Energy for American Farmers Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description We propose a large scale demonstration of solar assisted GSHP systems on two poultry farms in mid-Missouri. The heating load of Farm A with 4 barns will be 510 tons and Farm B with 5 barns will be 440 tons. Solar assisted GSHP systems will be installed, and new utility business model will be applied to both farms. Farm A will be constructed with commercial products in order to bring immediate impact to the industry. Farm B will also have a thermal energy storage system installed, and improved solar collectors will be used. A comprehensive energy analysis and economic study will be conducted.

274

Analysis of the Technical and Economic Potential for Mid-Scale Distributed Wind  

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

Analysis of the Technical and Analysis of the Technical and Economic Potential for Mid-Scale Distributed Wind December 2007 - October 31, 2008 R. Kwartin, A. Wolfrum, K. Granfield, A. Kagel, and A. Appleton ICF International Fairfax, Virginia Subcontract Report NREL/SR-500-44280 December 2008 An Analysis of the Technical and Economic Potential for Mid-Scale Distributed Wind December 2007 - October 31, 2008 R. Kwartin, A. Wolfrum, K. Granfield, A. Kagel, and A. Appleton ICF International Fairfax, Virginia NREL Technical Monitor: T. Forsyth Prepared under Subcontract No. AAM-8-89001-01 Subcontract Report NREL/SR-500-44280 December 2008 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy

275

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

276

ESS 2012 Peer Review - Nitrogen-Oxygen Battery for Large Scale Energy Storage - Frank Delnick, SNL  

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

US DOE Energy Storage Systems Research Program US DOE Energy Storage Systems Research Program Peer Review, Washington, DC Sept. 26-28, 2012 Frank Delnick, David Ingersoll, Karen Waldrip, Peter Feibelman Nitrogen/Oxygen Battery A Transformational Architecture for Large Scale Energy Storage Power Sources Technology Group Sandia National Laboratories Albuquerque, NM SAND2012-7881P N 2 /O 2 Battery Project Overview  Air/Air battery.  N 2 electrochemistry enables the redefinition of a gas (diffusion) electrode and the three phase interface.  Operated as redox flow battery.  Provide a very high energy density, very low cost, environmentally benign electrochemical platform for load leveling and for grid-integrated storage of energy generated by wind, solar and other sustainable but intermittent sources.

277

The Origin of Large-scale HI structures in the Magellanic Bridge  

E-Print Network (OSTI)

We investigate the formation of a number of key large-scale HI features in the ISM of the Magellanic Bridge using dissipationless numerical simulation techniques. This study comprises the first direct comparison between detailed HI maps of the Bridge and numerical simulations. We confirm that the SMC forms two tidal filaments: a near arm, which forms the connection between the SMC and LMC, and a counterarm. We show that the HI of the most dense part of the Bridge can become arranged into a bimodal configuration, and that the formation of a "loop" of HI, located off the North-Eastern edge of the SMC can be reproduced simply as a projection of the counter-arm, and without invoking localised energy-deposition processes such as SNe or stellar winds.

E. Muller; K. Bekki

2007-06-25T23:59:59.000Z

278

Diagnosing indicators of large-scale forcing of east-coast cyclogenesis  

Science Journals Connector (OSTI)

Extra-tropical cyclones that develop near the east coast of Australia often have severe consequences such as flash flooding and damaging winds and seas, as well as beneficial consequences such as being responsible for heavy rainfall events that contribute significantly to total rainfall and runoff. There is subjective evidence that the development of most major events, commonly known as East Coast Lows, is associated with the movement of a high amplitude upper-tropospheric trough system over eastern Australia. This paper examines a number of upper-tropospheric diagnostic quantities that might provide a basis for preparing a climatology of the large-scale drivers of east-coast cyclogenesis. A preliminary climatology of these diagnostic quantities, based on ECMWF interim reanalyses, is compared with a database of observed East Coast Low events. The potential application of these diagnostics to global climate model simulations of past and future climates is also discussed.

Andrew J Dowdy; Graham A Mills; Bertrand Timbal

2010-01-01T23:59:59.000Z

279

Lateral solids dispersion coefficient in large-scale fluidized beds  

SciTech Connect

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

280

A large volume 2000 MPA air source for the radiatively driven hypersonic wind tunnel  

SciTech Connect

An ultra-high pressure air source for a hypersonic wind tunnel for fluid dynamics and combustion physics and chemistry research and development must provide a 10 kg/s pure air flow for more than 1 s at a specific enthalpy of more than 3000 kJ/kg. The nominal operating pressure and temperature condition for the air source is 2000 MPa and 900 K. A radial array of variable radial support intensifiers connected to an axial manifold provides an arbitrarily large total high pressure volume. This configuration also provides solutions to cross bore stress concentrations and the decrease in material strength with temperature. [hypersonic, high pressure, air, wind tunnel, ground testing

Constantino, M

1999-07-14T23:59:59.000Z

Note: This page contains sample records for the topic "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

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

282

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network (OSTI)

provide more guidance and support. Large Scale Computing and Storage Requirements for Fusion Energy provide much-needed additional resources there remains a need to employ codes Large Scale Computing and Storage Requirements for Fusion Energy provide large gains with little application porting effort. Large Scale Computing and Storage Requirements for Fusion Energy

Gerber, Richard

2012-01-01T23:59:59.000Z

283

The Role of Alpha Particles in the Evolution of the Solar-wind Turbulence toward Short Spatial Scales  

Science Journals Connector (OSTI)

We present a numerical study of the kinetic dynamics of protons and alpha particles during the evolution of the solar-wind turbulent cascade, in which the energy injected in large-scale slab-type Alfvnic fluctuations is transferred toward short spatial scale lengths, across the proton skin depth. We make use of a hybrid Vlasov-Maxwell code that integrates numerically the Vlasov equation for both the ion species, while the electrons are considered as a fluid. The system evolution is investigated in terms of different values of the electron to proton and alpha particle to proton temperature ratios. The numerical results show that the previously studied kinetic dynamics of protons is not strongly affected by the presence of alpha particles, at least when they are present in low concentration. Our simulations not only provide a physical explanation for the generation of beams of accelerated particles along the direction of the ambient magnetic field for both protons and alpha particles, but also show that this mechanism is more efficient for protons than for alpha particles, in agreement with recent solar-wind data analyses.

D. Perrone; F. Valentini; P. Veltri

2011-01-01T23:59:59.000Z

284

Lessons from Large-Scale Renewable Energy Integration Studies...  

Office of Scientific and Technical Information (OSTI)

March. http:www.wind-integration.eu 5 See for example, Corbus, D., D. Lew, G. Jordan, W. Winters, F. Van Hull, J. Manobianco, and R. Zavadil. NovemberDecember 2009. "Up...

285

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network (OSTI)

Minnesota statewide wind integration study. November 2006.It would be very useful to wind integration studies if thisof net load vs. load Wind integration studies are generally

Coughlin, Katie

2011-01-01T23:59:59.000Z

286

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network (OSTI)

Wan, Yih-Huei. 2004. Wind Power Plant Behaviors: Analyses ofthe output of wind power plants. In a typical studyfluctuations across wind power plants located in the same

Coughlin, Katie

2011-01-01T23:59:59.000Z

287

Breakthrough Large-Scale Industrial Project Begins Carbon Capture and  

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

28, 2013 28, 2013 Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization DOE-Supported Project in Texas Demonstrates Viability of CCUS Technology Washington, D.C. - A breakthrough carbon capture, utilization, and storage (CCUS) project in Texas has begun capturing carbon dioxide (CO2) and piping it to an oilfield for use in enhanced oil recovery (EOR). MORE INFO Read the project factsheet The project at Air Products and Chemicals hydrogen production facility in Port Arthur, Texas, is significant for demonstrating both the effectiveness and commercial viability of CCUS technology as an option in helping mitigate atmospheric CO2 emissions. Funded in part through the American Recovery and Reinvestment Act (ARRA), the project is managed by the U.S.

288

Large-Scale Analyses of Glycosylation in Cellulases  

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

Article Article Large-Scale Analyses of Glycosylation in Cellulases Fengfeng Zhou 1,2 , Victor Olman 1,2 , and Ying Xu 1,2 * 1 Computational Systems Biology Laboratory, Department of Biochemistry and Molecular Biology / Institute of Bioinformatics, University of Georgia, Athens, GA 30602-7229, USA; 2 BioEnergy Science Center, Oak Ridge National Laboratory, Oak Ridge, TN 37830-8050, USA. *Corresponding author. E-mail: xyn@bmb.uga.edu DOI: 10.1016/S1672-0229(08)60049-2 Cellulases are important glycosyl hydrolases (GHs) that hydrolyze cellulose poly- mers into smaller oligosaccharides by breaking the cellulose β (1→4) bonds, and they are widely used to produce cellulosic ethanol from the plant biomass. N-linked and O-linked glycosylations were proposed to impact the catalytic ef f iciency, cel- lulose binding af f inity and the stability of cellulases based on observations

289

Cosmological Simulations for Large-Scale Sky Surveys | Argonne Leadership  

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

Instantaneous velocity magnitude in a flow through an open valve in a valve/piston assembly. Instantaneous velocity magnitude in a flow through an open valve in a valve/piston assembly. Instantaneous velocity magnitude in a flow through an open valve in a valve/piston assembly. Christos Altantzis, MIT, and Martin Schmitt, LAV. All the images were generated from their work at LAV. Cosmological Simulations for Large-Scale Sky Surveys PI Name: Christos Frouzakis PI Email: frouzakis@lav.mavt.ethz.ch Institution: Swiss Federal Institute of Technology Zurich Allocation Program: INCITE Allocation Hours at ALCF: 100 Million Year: 2014 Research Domain: Chemistry The combustion of coal and petroleum-based fuels supply most of the energy needed to meet the world's transportation and power generation demands. To address the anticipated petroleum shortage, along with increasing energy

290

Large Scale Geothermal Exchange System for Residential, Office and Retail  

Open Energy Info (EERE)

Geothermal Exchange System for Residential, Office and Retail Geothermal Exchange System for Residential, Office and Retail Development Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale Geothermal Exchange System for Residential, Office and Retail Development Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description RiverHeath will be a new neighborhood, with residences, shops, restaurants, and offices. The design incorporates walking trails, community gardens, green roofs, and innovative stormwater controls. A major component of the project is our reliance on renewable energy. One legacy of the land's industrial past is an onsite hydro-electric facility which formerly powered the paper factories. The onsite hydro is being refurbished and will furnish 100% of the project's electricity demand.

291

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

292

Isolating relativistic effects in large-scale structure  

E-Print Network (OSTI)

We present a fully relativistic calculation of the observed galaxy number counts in the linear regime. We show that besides the density fluctuations and redshift-space distortions, various relativistic effects contribute to observations at large scales. These effects all have the same physical origin: they result from the fact that our coordinate system, namely the galaxy redshift and the incoming photons' direction, is distorted by inhomogeneities in our universe. We then discuss the impact of the relativistic effects on the angular power spectrum and on the two-point correlation function in configuration space. We show that the latter is very well adapted to isolate the relativistic effects since it naturally makes use of the symmetries of the different contributions. In particular, we discuss how the Doppler effect and the gravitational redshift distortions can be isolated by looking for a dipole in the cross-correlation function between a bright and a faint population of galaxies.

Bonvin, Camille

2014-01-01T23:59:59.000Z

293

Transient simulation for large scale flow in bubble columns  

Science Journals Connector (OSTI)

Abstract The transient simulation of large scale bubbly flow in bubble columns using the unsteady Reynolds averaged Navier Stokes (URANS) equations is investigated in the present paper. An extensive set of bubble forces is used with different models for the bubble induced turbulence. Criteria are given to assess the independence of the simulation time and the time step length. Using these criteria it is shown that a simulation time, time step length and mesh independent solution can be obtained for complex bubbly flows using URANS equations under certain requirements. With the obtained setup the contribution of the resolved turbulence to the total turbulence and the influence of the bubble induced turbulence modeling on the resolved turbulence is investigated. Further, it is pointed out that the virtual mass force is not negligible. The simulations are compared to data from the literature at two different superficial velocities, which cover monodisperse and polydisperse bubbly flows.

T. Ziegenhein; R. Rzehak; D. Lucas

2015-01-01T23:59:59.000Z

294

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

295

Advanced coal gasifier designs using large-scale simulations  

SciTech Connect

Porting of the legacy code MFIX to a high performance computer (HPC) and the use of high resolution simulations for the design of a coal gasifier are described here. MFIX is based on a continuum multiphase flow model that considers gas and solids to form interpenetrating continua. Low resolution simulations of a commercial scale gasifier with a validated MFIX model revealed interesting physical phenomena with implications on the gasifier design, which prompted the study reported here. To be predictive, the simulations need to model the spatiotemporal variations in gas and solids volume fractions, velocities, temperatures with any associated phase change and chemical reactions. These processes occur at various time- and length-scales requiring very high spatial resolution and large number of iterations with small time-steps. We were able to perform perhaps the largest known simulations of gas-solids reacting flows, providing detailed information about the gas-solids flow structure and the pressure, temperature and species distribution in the gasifier. One key finding is the new features of the coal jet trajectory revealed with the high spatial resolution, which provides information on the accuracy of the lower resolution simulations. Methodologies for effectively combining high and low resolution simulations for design studies must be developed. From a computational science perspective, we found that global communication has to be reduced to achieve scalability to 1000s of cores, hybrid parallelization is required to effectively utilize the multicore chips, and the wait time in the batch queue significantly increases the actual time-to-solution. From our experience, development is required in the following areas: efficient solvers for heterogeneous, massively parallel systems; data analysis tools to extract information from large data sets; and programming environments for easily porting legacy codes to HPC.

Syamlal, M [National Energy Technology Laboratory (NETL); Guenther, Chris [National Energy Technology Laboratory (NETL); Gel, Aytekin [Aeolus Research Inc.; Pannala, Sreekanth [ORNL

2009-01-01T23:59:59.000Z

296

Large-Angular-Scale Anisotropy in the Cosmic Background Radiation  

DOE R&D Accomplishments (OSTI)

We report the results of an extended series of airborne measurements of large-angular-scale anisotropy in the 3 K cosmic background radiation. Observations were carried out with a dual-antenna microwave radiometer operating at 33 GHz (.089 cm wavelength) flown on board a U-2 aircraft to 20 km altitude. In eleven flights, between December 1976 and May 1978, the radiometer measured differential intensity between pairs of directions distributed over most of the northern hemisphere with an rms sensitivity of 47 mK Hz{sup 1?}. The measurements how clear evidence of anisotropy that is readily interpreted as due to the solar motion relative to the sources of the radiation. The anisotropy is well fit by a first order spherical harmonic of amplitude 360{+ or -}50km sec{sup -1} toward the direction 11.2{+ or -}0.5 hours of right ascension and 19 {+ or -}8 degrees declination. A simultaneous fit to a combined hypotheses of dipole and quadrupole angular distributions places a 1 mK limit on the amplitude of most components of quadrupole anisotropy with 90% confidence. Additional analysis places a 0.5 mK limit on uncorrelated fluctuations (sky-roughness) in the 3 K background on an angular scale of the antenna beam width, about 7 degrees.

Gorenstein, M. V.; Smoot, G. F.

1980-05-00T23:59:59.000Z

297

Numerical Simulations of Island-Scale Airflow over Maui and the Maui Vortex under Summer Trade Wind Conditions  

Science Journals Connector (OSTI)

The fifth-generation Pennsylvania State UniversityNCAR Mesoscale Model (MM5) coupled with the Noah land surface model (LSM) is employed to simulate island-scale airflow and circulations over Maui County, Hawaii, under summer trade wind ...

DaNa L. Carlis; Yi-Leng Chen; Vernon R. Morris

2010-07-01T23:59:59.000Z

298

Design advanced for large-scale, economic, floating LNG plant  

SciTech Connect

A floating LNG plant design has been developed which is technically feasible, economical, safe, and reliable. This technology will allow monetization of small marginal fields and improve the economics of large fields. Mobil`s world-scale plant design has a capacity of 6 million tons/year of LNG and up to 55,000 b/d condensate produced from 1 bcfd of feed gas. The plant would be located on a large, secure, concrete barge with a central moonpool. LNG storage is provided for 250,000 cu m and condensate storage for 650,000 bbl. And both products are off-loaded from the barge. Model tests have verified the stability of the barge structure: barge motions are low enough to permit the plant to continue operation in a 100-year storm in the Pacific Rim. Moreover, the barge is spread-moored, eliminating the need for a turret and swivel. Because the design is generic, the plant can process a wide variety of feed gases and operate in different environments, should the plant be relocated. This capability potentially gives the plant investment a much longer project life because its use is not limited to the life of only one producing area.

Naklie, M.M. [Mobil Technology Co., Dallas, TX (United States)

1997-06-30T23:59:59.000Z

299

Large Scale Obscuration and Related Climate Effects Workshop: Proceedings  

SciTech Connect

A Workshop on Large Scale Obsurcation and Related Climate Effects was held 29--31 January, 1992, in Albuquerque, New Mexico. The objectives of the workshop were: to determine through the use of expert judgement the current state of understanding of regional and global obscuration and related climate effects associated with nuclear weapons detonations; to estimate how large the uncertainties are in the parameters associated with these phenomena (given specific scenarios); to evaluate the impact of these uncertainties on obscuration predictions; and to develop an approach for the prioritization of further work on newly-available data sets to reduce the uncertainties. The workshop consisted of formal presentations by the 35 participants, and subsequent topical working sessions on: the source term; aerosol optical properties; atmospheric processes; and electro-optical systems performance and climatic impacts. Summaries of the conclusions reached in the working sessions are presented in the body of the report. Copies of the transparencies shown as part of each formal presentation are contained in the appendices (microfiche).

Zak, B.D.; Russell, N.A.; Church, H.W.; Einfeld, W.; Yoon, D.; Behl, Y.K. [eds.

1994-05-01T23:59:59.000Z

300

Wind and Wave Extremes over the World Oceans From Very Large Forecast Ensembles  

E-Print Network (OSTI)

Global return value estimates of significant wave height and 10-m neutral wind speed are estimated from very large aggregations of archived ECMWF ensemble forecasts at +240-h lead time from the period 2003-2012. The upper percentiles are found to match ENVISAT wind speed better than ERA-Interim (ERA-I), which tends to be biased low. The return estimates are significantly higher for both wind speed and wave height in the extratropics and the subtropics than what is found from ERA-I, but lower than what is reported by Caires and Sterl (2005) and Vinoth and Young (2011). The highest discrepancies between ERA-I and ENS240 are found in the hurricane-prone areas, suggesting that the ensemble comes closer than ERA-I in capturing the intensity of tropical cyclones. The width of the confidence intervals are typically reduced by 70% due to the size of the data sets. Finally, non-parametric estimates of return values were computed from the tail of the distribution. These direct return estimates compare very well with Ge...

Breivik, yvind; Abdalla, Saleh; Bidlot, Jean-Raymond

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

Wind Energy Update  

Wind Powering America (EERE)

by the Alliance for Sustainable Energy, LLC. by the Alliance for Sustainable Energy, LLC. Wind Energy Update Wind Powering America January 2012 NATIONAL RENEWABLE ENERGY LABORATORY Evolution of Commercial Wind Technology NATIONAL RENEWABLE ENERGY LABORATORY Small (≤100 kW) Homes Farms Remote Applications (e.g. water pumping, telecom sites, icemaking) Midscale (100-1000 kW) Village Power Hybrid Systems Distributed Power Large, Land-based (1-3 MW) Utility-scale wind farms Large Distributed Power Sizes and Applications Large, Offshore (3-7 MW) Utility-scale wind farms, shallow coastal waters No U.S. installations NATIONAL RENEWABLE ENERGY LABORATORY Capacity & Cost Trends As of January 2012 (AWEA) 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 50000 $- $200 $400 $600 $800 $1,000 $1,200

302

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

303

A Thesaurus and Online Encyclopedia Merging Method for Large Scale Domain-Ontology Automatic Construction  

Science Journals Connector (OSTI)

While building the large-scale domain ontology, the traditional manually-based construction method is low efficient and not feasible. In order to construct the large scale domain-ontology automatically; therefore...

Ting Wang; Jicheng Song; Ruihua Di; Yi Liang

2013-01-01T23:59:59.000Z

304

Mitigating Security Threats to Large-Scale Cross Border Virtualization Infrastructures  

Science Journals Connector (OSTI)

The large-scale cross border virtualization infrastructures can be seen as a federation of heterogeneous clouds. We present pragmatic analysis of the potential threats posed to the emerging large-scale cross...in...

Philippe Massonet; Syed Naqvi; Francesco Tusa; Massimo Villari

2010-01-01T23:59:59.000Z

305

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

306

Large-Scale Spray Releases: Initial Aerosol Test Results  

SciTech Connect

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

307

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations  

SciTech Connect

We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively cancels out the artificial boundary effects due to the subdivision of the system. As a consequence, the LS3DF program yields essentially the same results as direct density functional theory (DFT) calculations. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors. This leads to almost perfect parallelization on tens of thousands of processors. After code optimization, we were able to achieve 35.1 Tflop/s, which is 39percent of the theoretical speed on 17,280 Cray XT4 processor cores. Our 13,824-atom ZnTeO alloy calculation runs 400 times faster than a direct DFTcalculation, even presuming that the direct DFT calculation can scale well up to 17,280 processor cores. These results demonstrate the applicability of the LS3DF method to material simulations, the advantage of using linearly scaling algorithms over conventional O(N3) methods, and the potential for petascale computation using the LS3DF method.

Wang, Lin-Wang; Lee, Byounghak; Shan, Hongzhang; Zhao, Zhengji; Meza, Juan; Strohmaier, Erich; Bailey, David H.

2008-07-01T23:59:59.000Z

308

A divide-and-conquer linear scaling three dimensional fragment method for large scale electronic structure calculations  

E-Print Network (OSTI)

large scale electronic structure calculations Zhengji Zhao,total energy electronic structure calculation method basedfor ab initio electronic structure calculations. We have

Zhao, Zhengji

2008-01-01T23:59:59.000Z

309

Political risk analysis in large-scale mineral investments  

SciTech Connect

This dissertation emphasizes problems encountered in applying current techniques within the framework of the expected-net-present-value investment evaluation paradigms commonly employed by mineral extraction firms. A method of political risk analysis consistent with expected-net-present-value paradigms is presented. This method of political risk analysis is grounded in the neoclassical tradition of economics which holds that economics should determine politics. The method of political risk analysis presented consists of direct and indirect portions. The direct portion of the method requires electoral polling to formulate support distributions for possible host nation policies toward foreign investors. It is applicable in freely politicized host nations. The indirect portion of the method presumes that abnormalities in economic trends produce political pressures intended to return a host nation economy to its normal state. Large-scale mineral investments are particularly vulnerable to political pressures and are at risk whenever economic abnormalities in a host nation manifest themselves. The degree of political risk present at any time is a direct function of the deviation of a host nation economy from its normal condition.

Proehl, T.S.

1985-01-01T23:59:59.000Z

310

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 Dor; 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; Ane Slosar; Kendrick Smith; Matias Zaldarriaga; Valentin Assassi; Jonathan Braden; Amir Hajian; Takeshi Kobayashi; George Stein; Alexander van Engelen

2014-12-15T23:59:59.000Z

311

Large Scale Structure in the SDSS DR1 Galaxy Survey  

E-Print Network (OSTI)

The Large Scale Structure in the galaxy distribution is investigated using The First Data Release of the Sloan Digital Sky Survey. Using the Minimal Spanning Tree technique we have extracted sets of filaments, of wall--like structures, of galaxy groups, and of rich clusters from this unique sample. The physical properties of these structures were then measured and compared with the statistical expectations based on the Zel'dovich' theory. The measured characteristics of galaxy walls were found to be consistent with those for a spatially flat $\\Lambda$CDM cosmological model with $\\Omega_m\\approx$ 0.3 and $\\Omega_\\Lambda \\approx$ 0.7, and for Gaussian initial perturbations with a Harrison -- Zel'dovich power spectrum. Furthermore, we found that the mass functions of groups and of unrelaxed structure elements generally fit well with the expectations from Zel'dovich' theory. We also note that both groups and rich clusters tend to prefer the environments of walls, which tend to be of higher density, rather than the environments of filaments, which tend to be of lower density.

A. Doroshkevich; D. L. Tucker; S. Allam; M. J. Way

2003-07-11T23:59:59.000Z

312

Decoherence Rates in Large Scale Quantum Computers and Macroscopic Systems  

E-Print Network (OSTI)

Markovian regime decoherence effects in quantum computers are studied in terms of the fidelity for the situation where the number of qubits N becomes large. A general expression giving the decoherence time scale in terms of Markovian relaxation elements and expectation values of products of system fluctuation operators is obtained, which could also be applied to study decoherence in other macroscopic systems such as Bose condensates and superconductors. A standard circuit model quantum computer involving three-state lambda system ionic qubits is considered, with qubits localised around well-separated positions via trapping potentials. The centre of mass vibrations of the qubits act as a reservoir. Coherent one and two qubit gating processes are controlled by time dependent localised classical electromagnetic fields that address specific qubits, the two qubit gating processes being facilitated by a cavity mode ancilla, which permits state interchange between qubits. With a suitable choice of parameters, it is found that the decoherence time can be made essentially independent of N.

B J Dalton

2005-07-25T23:59:59.000Z

313

Breakdown of large-scale circulation in turbulent rotating convection  

Science Journals Connector (OSTI)

Turbulent rotating convection in a cylinder is investigated both numerically and experimentally at Rayleigh number Ra=109 and Prandtl number ?=6.4. In this letter we discuss two topics: the breakdown under rotation of the domain-filling large-scale circulation (LSC) typical for confined convection, and the convective heat transfer through the fluid layer, expressed by the Nusselt number. The presence of the LSC is addressed for several rotation rates. For Rossby numbers Ro1.2 no LSC is found (the Rossby number indicates relative importance of buoyancy over rotation, hence small Ro indicates strong rotation). For larger Rossby numbers a precession of the LSC in anticyclonic direction (counter to the background rotation) is observed. It is shown that the heat transfer has a maximal value close to Ro=0.18 being about 15% larger than in the non-rotating case Ro=?. Since the LSC is no longer present at this Rossby value we conclude that the peak heat transfer is independent of the LSC.

R. P. J. Kunnen; H. J. H. Clercx; B. J. Geurts

2008-01-01T23:59:59.000Z

314

Quantifying the sensitivity of wind farm performance to array layout options using large-eddy simulation  

E-Print Network (OSTI)

the effects of array layout on the performance of offshore wind farms. Array layout is characterized by the spacing between wind turbines (along and across the prevailing wind direction) and by their alignment and is coupled with an actuator line model to simulate the effects of the rotating wind turbine blades. A control

315

HST-Scale 3D simulations of MHD disc winds : A rotating two-component jet structure  

E-Print Network (OSTI)

We present the results of large scale, three-dimensional magneto-hydrodynamics simulations of disc-winds for different initial magnetic field configurations. The jets are followed from the source to 90 AU scale, which covers several pixels of HST images of nearby protostellar jets. Our simulations show that jets are heated along their length by many shocks. We compute the emission lines that are produced, and find excellent agreement with observations. The jet width is found to be between 20 and 30 AU while the maximum velocities perpendicular to the jet is found to be up to above 100 km/s. The initially less open magnetic field configuration simulations results in a wider, two-component jet; a cylindrically shaped outer jet surrounding a narrow and much faster, inner jet. These simulations preserve the underlying Keplerian rotation profile of the inner jet to large distances from the source. However, for the initially most open magnetic field configuration the kink mode creates a narrow corkscrew-like jet wi...

Staff, Jan; Ouyed, Rachid; Thompson, Adam; Pudritz, Ralph

2014-01-01T23:59:59.000Z

316

NREL: Wind Research - Publications  

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

Publications Publications The NREL wind research program develops publications about its R&D activities in wind energy technologies. Below you'll find links to recently published publications, links to the NREL Avian Literature and Publications Databases, and information about the Technical Library at the National Wind Technology Center (NWTC). The NWTC's quarterly newsletter, @NWTC, contains articles on current wind energy research projects and highlights the latest reports, papers, articles, and events published or sponsored by NREL. Subscribe to @NWTC. Selected Publications Featured Publication Large-scale Offshore Wind Power in the United States: Assessment of Opportunities and Barriers Here are some selected NWTC publications: 2011 Cost of Wind Energy Review Built-Environment Wind Turbine Roadmap

317

Offshore wind metadata management  

Science Journals Connector (OSTI)

Offshore wind energy is gaining more and more attention from industry and research community due to its high potential in producing green energy and lowering price on electricity consumption. However, offshore wind is facing many challenges, and hence it is still expensive to install in large scale. It therefore needs to be considered from different aspects of technologies in order to overcome these challenges. One of the problems of the offshore wind is that information comes from different sources with diversity in types and format. Besides, there are existing wind databases that should be utilised in order to enrich the knowledge base of the wind domain. This paper describes an approach to managing offshore wind metadata effectively using semantic technologies. An offshore wind ontology has been developed. The semantic gap between the developed ontology and the relational database is investigated. A prototype system has been developed to demonstrate the use of the ontology.

Trinh Hoang Nguyen; Rocky Dunlap; Leo Mark; Andreas Prinz; Bjørn Mo ?stgren; Trond Friisø

2014-01-01T23:59:59.000Z

318

Large Scale Computing and Storage Requirements for Nuclear Physics Research  

SciTech Connect

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, DOEs Office of Advanced Scientific Computing Research (ASCR) and DOEs 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 NERSCs 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

319

Large Scale Structure in the SDSS Galaxy Survey  

E-Print Network (OSTI)

The Large Scale Structure (LSS) in the galaxy distribution is investigated using the Sloan Digital Sky Survey Early Data Release (SDSS EDR). Using the Minimal Spanning Tree technique we have extracted sets of filaments, of wall-like structures, of galaxy groups, and of rich clusters from this unique sample. The physical properties of these structures were then measured and compared with the expectations from Zel'dovich' theory. The measured characteristics of galaxy walls were found to be consistent with those for a spatially flat $\\Lambda$CDM cosmological model with $\\Omega_m\\approx$ 0.3 and $\\Omega_\\Lambda \\approx$ 0.7, and for Gaussian initial perturbations with a Harrison -- Zel'dovich power spectrum. Furthermore, we found that the mass functions of groups and of unrelaxed structure elements generally fit well with the expectations from Zel'dovich' theory, although there was some discrepancy for lower mass groups which may be due to incompleteness in the selected sample of groups. We also note that both groups and rich clusters tend to prefer the environments of walls, which tend to be of higher density, rather than the environments of filaments, which tend to be of lower density. Finally, we note evidence of systematic differences in the properties of the LSS between the Northern Galactic Cap stripe and the Southern Galactic Cap stripe -- in particular, in the physical properties of the walls, their spatial distribution, and the relative numbers of clusters embedded in walls. Because the mean separation of walls is $\\approx$ 60 -- 70$h^{-1}$ Mpc, each stripe only intersects a few tens of walls. Thus, small number statistics and cosmic variance are the likely drivers of these systematic differences.

A. Doroshkevich; D. L. Tucker; S. Allam

2002-06-18T23:59:59.000Z

320

Economic and Technical Feasibility Study of Utility-Scale Wind Generation for the New York Buffalo River and South Buffalo Brownfield Opportunity Areas  

SciTech Connect

Through the RE-Powering America's Land initiative, the economic and technical feasibility of utilizing contaminated lands in the Buffalo, New York, area for utility-scale wind development is explored. The study found that there is available land, electrical infrastructure, wind resource, and local interest to support a commercial wind project; however, economies of scale and local electrical markets may need further investigation before significant investment is made into developing a wind project at the Buffalo Reuse Authority site.

Roberts, J. O.; Mosey, G.

2014-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

CgWind: A high-order accurate simulation tool for wind turbines and wind farms  

SciTech Connect

CgWind is a high-fidelity large eddy simulation (LES) tool designed to meet the modeling needs of wind turbine and wind park engineers. This tool combines several advanced computational technologies in order to model accurately the complex and dynamic nature of wind energy applications. The composite grid approach provides high-quality structured grids for the efficient implementation of high-order accurate discretizations of the incompressible Navier-Stokes equations. Composite grids also provide a natural mechanism for modeling bodies in relative motion and complex geometry. Advanced algorithms such as matrix-free multigrid, compact discretizations and approximate factorization will allow CgWind to perform highly resolved calculations efficiently on a wide class of computing resources. Also in development are nonlinear LES subgrid-scale models required to simulate the many interacting scales present in large wind turbine applications. This paper outlines our approach, the current status of CgWind and future development plans.

Chand, K K; Henshaw, W D; Lundquist, K A; Singer, M A

2010-02-22T23:59:59.000Z

322

WindPACT Turbine Design Scaling Studies: Technical Area 4ƒBalance-of-Station Cost  

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

1 * NREL/SR-500-29950 1 * NREL/SR-500-29950 D.A. Shafer, K.R. Strawmyer, R.M. Conley, J.H. Guidinger, D.C. Wilkie, and T.F. Zellman With assistance from D.W. Bernadett Commonwealth Associates, Inc. Jackson, Michigan WindPACT Turbine Design Scaling Studies: Technical Area 4- Balance-of-Station Cost 21 March 2000-15 March 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 July 2001 * NREL/SR-500-29950 WindPACT Turbine Desing Scaling Studies: Technical Area 4- Balance-of-Station Cost 21 March 2000-15 March 2001 D.A. Shafer, K.R. Strawmyer, R.M. Conley, J.H. Guidinger, D.C. Wilkie, and T.F. Zellman

323

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

324

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network (OSTI)

Huei. 2005. Primer on Wind Power for Utility Applications.Wan, Yih-Huei. 2004. Wind Power Plant Behaviors: Analysesof Long-Term Wind Power Data. National Renewable Energy Lab

Coughlin, Katie

2011-01-01T23:59:59.000Z

325

Analysis of Wind Power and Load Data at Multiple Time Scales  

E-Print Network (OSTI)

2007. Analysis of Wind Power and Load Data at Multiple Timesd- Analysis of Wind Power and Load Data at Multiple Time35 v Analysis of Wind Power and Load Data at Multiple Time

Coughlin, Katie

2011-01-01T23:59:59.000Z

326

VERTICAL STRUCTURE OF STATIONARY ACCRETION DISKS WITH A LARGE-SCALE MAGNETIC FIELD  

SciTech Connect

In earlier works we pointed out that the disk's surface layers are non-turbulent and thus highly conducting (or non-diffusive) because the hydrodynamic and/or magnetorotational instabilities are suppressed high in the disk where the magnetic and radiation pressures are larger than the plasma thermal pressure. Here, we calculate the vertical profiles of the stationary accretion flows (with radial and azimuthal components), and the profiles of the large-scale, magnetic field taking into account the turbulent viscosity and diffusivity and the fact that the turbulence vanishes at the surface of the disk. Also, here we require that the radial accretion speed be zero at the disk's surface and we assume that the ratio of the turbulent viscosity to the turbulent magnetic diffusivity is of order unity. Thus, at the disk's surface there are three boundary conditions. As a result, for a fixed dimensionless viscosity {alpha}-value, we find that there is a definite relation between the ratio R of the accretion power going into magnetic disk winds to the viscous power dissipation and the midplane plasma-{beta}, which is the ratio of the plasma to magnetic pressure in the disk. For a specific disk model with R of order unity we find that the critical value required for a stationary solution is {beta}{sub c} Almost-Equal-To 2.4r/({alpha}h), where h is the disk's half thickness. For weaker magnetic fields, {beta} > {beta}{sub c}, we argue that the poloidal field will advect outward while for {beta} < {beta}{sub c} it will advect inward. Alternatively, if the disk wind is negligible (R<<1), there are stationary solutions with {beta} >> {beta}{sub c}.

Bisnovatyi-Kogan, G. S. [Space Research Institute, Russian Academy of Sciences, Moscow (Russian Federation); Lovelace, R. V. E., E-mail: gkogan@mx.iki.rssi.ru, E-mail: RVL1@cornell.edu [Department of Astronomy, Cornell University, Ithaca, NY 14853-6801 (United States)

2012-05-10T23:59:59.000Z

327

Energy from the wind  

Science Journals Connector (OSTI)

The large?scale generation of electrical power by wind turbine fields is discussed. It is shown that the maximum power which can be extracted by a wind turbine is 16/27 or 59.3% of the power available in the wind. An estimate is made of the total electrical power which could be generated in the United States by utilizing wind energy. The material in this paper was presented by the authors in a one?semester course on energy science. It could also be used in an introductory physics class as an illustration of elementary fluid mechanics concepts and of the basic principles of energy and momentum conservation.

David G. Pelka; Robert T. Park; Runbir Singh

1978-01-01T23:59:59.000Z

328

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...

329

Sandia National Laboratories: Wind Energy  

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

first phase of a project to explore the feasibility of large-scale vertical-axis wind turbines (VAWTs) for deep-water offshore locations. The results of this conceptual study...

330

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 forecasting. I. INTRODUCTION HE actual large-scale integration of wind energy in several European countries enhance the position of wind energy compared to other dispatchable forms of generation. Predicting

Paris-Sud XI, Université de

331

DOE/SNL-TTU scaled wind farm technology facility : research opportunities for study of turbine-turbine interaction.  

SciTech Connect

The proposed DOE/Sandia Scaled Wind Farm Technology Facility (SWiFT) hosted by Texas Tech University at Reese Technology Center in Lubbock, TX, will provide a facility for experimental study of turbine-turbine interaction and complex wind farm aerodynamics. This document surveys the current status of wind turbine wake and turbine-turbine interaction research, identifying knowledge and data gaps that the proposed test site can potentially fill. A number of turbine layouts is proposed, allowing for up to ten turbines at the site.

Barone, Matthew Franklin; White, Jonathan

2011-09-01T23:59:59.000Z

332

Regional climate consequences of large-scale cool roof and photovoltaic  

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

climate consequences of large-scale cool roof and photovoltaic climate consequences of large-scale cool roof and photovoltaic array deployment Title Regional climate consequences of large-scale cool roof and photovoltaic array deployment Publication Type Journal Article Year of Publication 2011 Authors Millstein, Dev, and Surabi Menon Journal Environmental Research Letters Volume 6 Start Page 1 Pagination 9 Date Published 07/2011 Keywords co2 offsets, cool roof, photovoltaics, radiative forcing, urban environment Abstract Modifications to the surface albedo through the deployment of cool roofs and pavements (reflective materials) and photovoltaic arrays (low reflection) have the potential to change radiative forcing, surface temperatures, and regional weather patterns. In this work we investigate the regional climate and radiative effects of modifying surface albedo to mimic massive deployment of cool surfaces (roofs and pavements) and, separately, photovoltaic arrays across the United States. We use a fully coupled regional climate model, the Weather Research and Forecasting (WRF) model, to investigate feedbacks between surface albedo changes, surface temperature, precipitation and average cloud cover. With the adoption of cool roofs and pavements, domain-wide annual average outgoing radiation increased by 0.16 ± 0.03 W m-2 (mean ± 95% C.I.) and afternoon summertime temperature in urban locations was reduced by 0.11-0.53 "C, although some urban areas showed no statistically significant temperature changes. In response to increased urban albedo, some rural locations showed summer afternoon temperature increases of up to +0.27 "C and these regions were correlated with less cloud cover and lower precipitation. The emissions offset obtained by this increase in outgoing radiation is calculated to be 3.3 ± 0.5 Gt CO2 (mean ± 95% C.I.). The hypothetical solar arrays were designed to be able to produce one terawatt of peak energy and were located in the Mojave Desert of California. To simulate the arrays, the desert surface albedo was darkened, causing local afternoon temperature increases of up to +0.4 "C. Due to the solar arrays, local and regional wind patterns within a 300 km radius were affected. Statistically significant but lower magnitude changes to temperature and radiation could be seen across the domain due to the introduction of the solar arrays. The addition of photovoltaic arrays caused no significant change to summertime outgoing radiation when averaged over the full domain, as interannual variation across the continent obscured more consistent local forcing.

333

Regional climate consequences of large-scale cool roof and photovoltaic  

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

climate consequences of large-scale cool roof and photovoltaic climate consequences of large-scale cool roof and photovoltaic array deployment Title Regional climate consequences of large-scale cool roof and photovoltaic array deployment Publication Type Journal Article Year of Publication 2011 Authors Millstein, Dev, and Surabi Menon Journal Environmental Research Letters Volume 6 Start Page 1 Pagination 9 Date Published 07/2011 Keywords co2 offsets, cool roofs, photovoltaics, radiative forcing, urban environment Abstract Modifications to the surface albedo through the deployment of cool roofs and pavements (reflective materials) and photovoltaic arrays (low reflection) have the potential to change radiative forcing, surface temperatures, and regional weather patterns. In this work we investigate the regional climate and radiative effects of modifying surface albedo to mimic massive deployment of cool surfaces (roofs and pavements) and, separately, photovoltaic arrays across the United States. We use a fully coupled regional climate model, the Weather Research and Forecasting (WRF) model, to investigate feedbacks between surface albedo changes, surface temperature, precipitation and average cloud cover. With the adoption of cool roofs and pavements, domain-wide annual average outgoing radiation increased by 0.16 ± 0.03 W m-2 (mean ± 95% C.I.) and afternoon summertime temperature in urban locations was reduced by 0.11-0.53 "C, although some urban areas showed no statistically significant temperature changes. In response to increased urban albedo, some rural locations showed summer afternoon temperature increases of up to +0.27 "C and these regions were correlated with less cloud cover and lower precipitation. The emissions offset obtained by this increase in outgoing radiation is calculated to be 3.3 ± 0.5 Gt CO2 (mean ± 95% C.I.). The hypothetical solar arrays were designed to be able to produce one terawatt of peak energy and were located in the Mojave Desert of California. To simulate the arrays, the desert surface albedo was darkened, causing local afternoon temperature increases of up to +0.4 "C. Due to the solar arrays, local and regional wind patterns within a 300 km radius were affected. Statistically significant but lower magnitude changes to temperature and radiation could be seen across the domain due to the introduction of the solar arrays. The addition of photovoltaic arrays caused no significant change to summertime outgoing radiation when averaged over the full domain, as interannual variation across the continent obscured more consistent local forcing.

334

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network (OSTI)

Magnetic Spectrometer, Dark Energy Survey, Palomar Transientform the basis for dark energy surveys. Unlike high-redshiftDark Energy Mission (JDEM) and the Large Synoptic Sky Survey (

Gerber, Richard A.

2011-01-01T23:59:59.000Z

335

Issues in strategic management of large-scale software product line development  

E-Print Network (OSTI)

This thesis reflects on the issues and challenges large software product engineering managers face. Software is hard to engineer on a small scale, but at a larger scale, engineering and management tasks are even more ...

Nivoit, Jean-Baptiste (Jean-Baptiste Henri)

2013-01-01T23:59:59.000Z

336

Stellar feedback in galaxies and the origin of galaxy-scale winds  

Science Journals Connector (OSTI)

......model is less clearly wind-like but is instead...3 Left: galactic wind thermal emission morphology...X-ray emission. The maps show edge-on images...clumpy/multiphase wind is typical, similar...in radial outflow velocity. The material at...wind, much of the mass is in the form of......

Philip F. Hopkins; Eliot Quataert; Norman Murray

2012-04-21T23:59:59.000Z

337

Wind Energy Technology Basics | Department of Energy  

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

Wind Energy Technology Basics Wind Energy Technology Basics Wind Energy Technology Basics August 15, 2013 - 4:10pm Addthis Photo of a hilly field, with six visible wind turbines spinning in the wind. Wind energy technologies use the energy in wind for practical purposes such as generating electricity, charging batteries, pumping water, and grinding grain. Most wind energy technologies can be used as stand-alone applications, connected to a utility power grid, or even combined with a photovoltaic system. For utility-scale sources of wind energy, a large number of turbines are usually built close together to form a wind farm that provides grid power. Several electricity providers use wind farms to supply power to their customers. Stand-alone turbines are typically used for water pumping or

338

Turbo King: Framework for Large-Scale Internet Delay Measurements  

E-Print Network (OSTI)

servers (which is called cache pollution) and requires large traffic overhead when deployed in large consuming half the bandwidth needed by King and reducing the impact of cache pollution by several orders building an all-to-all delay matrix between approximately 220, 000 BGP prefixes advertised in the Internet

Loguinov, Dmitri

339

The global financial markets: an ultra-large-scale systems perspective  

Science Journals Connector (OSTI)

We argue here that, in recent years, the world's financial markets have become a globally interconnected complex adaptive ultra-large-scale socio-technical system-of-systems, and that this has important consequences for how the financial markets should ... Keywords: algorithmic trading, financial markets, flash crash, high-frequency trading, large-scale complex IT systems, normalization of deviance, ultra-large-scale systems

Dave Cliff; Linda Northrop

2012-03-01T23:59:59.000Z

340

Hydrodynamic motion of a large prestressed concrete bucket foundation for offshore wind turbines  

Science Journals Connector (OSTI)

A large prestressed concrete bucket foundation (LPCBF) was used for the first offshore wind turbine in the Qidong sea area of Jiangsu Province in China. The most critical technique of the foundation is the self-floating towing technique based on a reasonable subdivision inside the bucket. To predict the dynamic behaviors of the LPCBF in waves supported by the air cushion the hydrodynamic software MOSES is used to simulate the three-dimensional motion of the foundation in the towing construction site. The prototype foundation models are established using MOSES with a water draft of 4?m 5?m and 6?m in given environmental conditions. The results show that the hydrodynamic responses of the large floater with air cushions depend not only on the wave conditions but also on the mass of the water column air cushion height and air pressure distribution. In addition the hydrodynamic characteristics can be tuned resulting in small dynamic responses in a particular sea state by changing the draft and water plug height. The floating technique of the LPCBF with supported air cushions in waves is highly competitive for saving cost while using few expensive types of equipment during the towing transportation.

Puyang Zhang; Hongyan Ding; Conghuan Le

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

The Impact of the CMB on Large-Scale Structure  

E-Print Network (OSTI)

The COBE detection of microwave anisotropies provides the best way of fixing the amplitude of cosmological fluctuations on the largest scales. We discuss the impact of this new, precise normalization and give fitting formulae for the horizon-crossing amplitude as a function of \\Omega_0 and n for both open and flat cosmologies. We also discuss the relevant normalization (\\sigma_8) at galaxy-clustering scales. Already it is clear that the inferred \\sigma_8 can be unnaccepatably high for some of the simplest inflationary models, although many minor variants give an adequate fit. Generic topological defect models appear to fare rather badly, and it is unclear whether minor variants or improved calculations will help much. The detection and mapping of structure in the CMB anisotropy spectrum on smaller scales in the near future will enable us to achieve much stronger constraints on models.

Martin White; Douglas Scott

1996-01-30T23:59:59.000Z

342

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

343

E-Print Network 3.0 - astrophysical large-scale dynamos Sample...  

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

dynamo cycle periods in astrophysical objects. An important... dynamos into three types: 1. magnetically dominated helical dynamos which sustain a large-scale magnetic... )...

344

DOE/NNSA Participates in Large-Scale CTBT On-Site Inspection...  

National Nuclear Security Administration (NNSA)

Large-Scale CTBT On-Site Inspection Exercise in Jordan | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile...

345

Comparison of Large Scale Renewable Energy Projects for the United States Air Force.  

E-Print Network (OSTI)

??This thesis focused on the performance of large-scale renewable energy projects for the United States Air Force. As global energy demands continue to rise, the (more)

Hughes, Jeffrey S

2012-01-01T23:59:59.000Z

346

Enabling Large-Scale Linear Systems of Equations on Hybrid HPC Infrastructures  

Science Journals Connector (OSTI)

Scientific research is becoming increasingly dependent on the large-scale analysis of data using High Performance Computing (HPC) infrastructures. Scientific computing aims at constructing mathematical models ......

H. Astsatryan; V. Sahakyan; Yu. Shoukouryan; M. Dayd; A. Hurault

2012-01-01T23:59:59.000Z

347

Optimization and control of a large-scale solar chimney power plant.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: The dissertation builds on previous research (Pretorius, 2004) and investigates the optimization and control of a large-scale solar chimney power plant. Performance results (more)

Pretorius, Johannes Petrus

2007-01-01T23:59:59.000Z

348

Analysis of Wind Power and Load Data at Multiple Time Scales  

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

47E 47E ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY Analysis of Wind Power and Load Data at Multiple Time Scales Katie Coughlin and Joseph H. Eto Environmental Energy Technologies Division December 2010 The work described in this report was funded by the Federal Energy Regulatory Commission, Office of Electric Reliability. The Lawrence Berkeley National Laboratory is operated by the University of California for the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the

349

Observation of Turbulent Intermittency Scaling with Magnetic Helicity in an MHD Plasma Wind Tunnel  

Science Journals Connector (OSTI)

The intermittency in turbulent magnetic field fluctuations has been observed to scale with the amount of magnetic helicity injected into a laboratory plasma. An unstable spheromak injected into the MHD wind tunnel of the Swarthmore Spheromak Experiment displays turbulent magnetic and plasma fluctuations as it relaxes into a Taylor state. The level of intermittency of this turbulence is determined by finding the flatness of the probability distribution function of increments for magnetic pickup coil fluctuations B?(t). The intermittency increases with the injected helicity, but spectral indices are unaffected by this variation. While evidence is provided which supports the hypothesis that current sheets and reconnection sites are related to the generation of this intermittent signal, the true nature of the observed intermittency remains unknown.

D.?A. Schaffner; A. Wan; M.?R. Brown

2014-04-25T23:59:59.000Z

350

Small-scale wind turbines in cities and suburbs S Tullis, K Aly, R Bravo, A Fiedler, S Kooiman, K McLaren S Ziada  

E-Print Network (OSTI)

Small-scale wind turbines in cities and suburbs S Tullis, K Aly, R Bravo, A Fiedler, S Kooiman, K wind turbines in the urban environment: Current Research at McMaster University Nominal performance #12;Horizontal axis small wind turbines Numerous suppliers of turbines for tower/field installation

Tullis, Stephen

351

Biomass Gasification for Electricity and Fuels , Large Scale  

Science Journals Connector (OSTI)

It is commonly agreed that gasification of biomass has a large potential for a more sustainable energy system in the future. However, a lot of research and demonstration efforts have been carried out during t...

Dr. Hermann Hofbauer

2012-01-01T23:59:59.000Z

352

Biomass Gasification for Electricity and Fuels , Large Scale  

Science Journals Connector (OSTI)

It is commonly agreed that gasification of biomass has a large potential for a more sustainable energy system in the future. However, a lot of research and demonstration efforts have been carried out during t...

Dr. Hermann Hofbauer

2013-01-01T23:59:59.000Z

353

Large-Scale Syntactic Processing: Parsing the Web  

E-Print Network (OSTI)

; improve the efficiency of the parser through various methods of chart pruning; use self, processing tens of sentences per second. For web-scale text processing, we aimed to make the parser an order of magnitude faster still. The c&c parser is one of only very few parsers currently available which has

Copestake, Ann

354

Mesh generation and mesh adaptation for large-scale Earth-system modelling  

Science Journals Connector (OSTI)

...coexist with a grid generation approach for complex...bathymetry). Mesh generation is a computational fluid...aircraft or inside a nuclear reactor. In-the large-scale...environmental community, mesh generation research has been largely...

2009-01-01T23:59:59.000Z

355

Some Computational Issues on Fluid Dynamics in Large-Scale Hydraulic Turbines  

Science Journals Connector (OSTI)

The large Reynolds number, flow unsteadiness and complicated geometry give rise to complex flow phenomena in large scale hydraulic turbines and make such a field challenging for...1]. The verification of codes, v...

F. J. Wang; C. L. Liao; X. L. Tang; J. M. Ma; Y. J. Li; W. Zhao

2009-01-01T23:59:59.000Z

356

Large-scale perturbations due to a small-scale instability in a finite-conductivity plasma  

SciTech Connect

By considering kink modes in a plasma cylinder in a strong axial magnetic field as an example, it is demonstrated that, because of the finite plasma conductivity (the finite longitudinal plasma permittivity {epsilon}{sub parallel}), large-scale perturbations can grow with time due to a small-scale instability that develops near a certain magnetic surface.

Arsenin, V. V. [Russian Research Centre Kurchatov Institute, Nuclear Fusion Institute (Russian Federation)

2007-01-15T23:59:59.000Z

357

Utility Wind Integration Group Distributed Wind/Solar Interconnection  

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

Utility Wind Integration Group Distributed Wind/Solar Utility Wind Integration Group Distributed Wind/Solar Interconnection Workshop Utility Wind Integration Group Distributed Wind/Solar Interconnection Workshop May 21, 2013 8:00AM MDT to May 22, 2013 5:00PM MDT Golden, Colorado This two-day workshop will answer your questions about interconnecting wind and solar plants and other distributed generation applications to electric distribution systems while providing insight on integrating large-scale renewable generation into the transmission system. Held at the National Renewable Energy Laboratory's (NREL) state-of-the-art Energy Systems Integration Facility (ESIF) on the first day and at the Western Area Power Administration's Electric Power Training Center (EPTC) on the second day, the workshop will provide an overview of wind and solar interconnection

358

Equivalencing the Collector System of a Large Wind Power Plant: Preprint  

SciTech Connect

This paper focuses on our effort to develop an equivalent representation of a wind power plant collector system for power system planning studies.

Muljadi, E.; Butterfield, C. P.; Ellis, A.; Mechenbier, J.; Hochheimer, J.; Young, R.; Miller, N.; Delmerico, R.; Zavadil, R.; Smith, J. C.

2006-01-01T23:59:59.000Z

359

SPIDER: A Balloon-borne Large-scale CMB Polarimeter  

E-Print Network (OSTI)

Spider is a balloon-borne experiment that will measure the polarization of the Cosmic Microwave Background over a large fraction of a sky at 1 degree resolution. Six monochromatic refracting millimeter-wave telescopes with large arrays of antenna-coupled transition-edge superconducting bolometers will provide system sensitivities of 4.2 and 3.1 micro K_cmb rt s at 100 and 150 GHz, respectively. A rotating half-wave plate will modulate the polarization sensitivity of each telescope, controlling systematics. Bolometer arrays operating at 225 GHz and 275 GHz will allow removal of polarized galactic foregrounds. In a 2-6 day first flight from Alice Springs, Australia in 2010, Spider will map 50% of the sky to a depth necessary to improve our knowledge of the reionization optical depth by a large factor.

B. P. Crill; P. A. R. Ade; E. S. Battistelli; S. Benton; R. Bihary; J. J. Bock; J. R. Bond; J. Brevik; S. Bryan; C. R. Contaldi; O. Dore; M. Farhang; 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; C. J. MacTavish; T. G. Martin; P. Mason; T. E. Montroy; C. B. Netterfield; E. Pascale; D. Riley; J. E. Ruhl; M. C. Runyan; A. Trangsrud; C. Tucker; A. Turner; M. Viero; D. Wiebe

2008-07-09T23:59:59.000Z

360

Multilevel method for modeling large-scale networks.  

SciTech Connect

Understanding the behavior of real complex networks is of great theoretical and practical significance. It includes developing accurate artificial models whose topological properties are similar to the real networks, generating the artificial networks at different scales under special conditions, investigating a network dynamics, reconstructing missing data, predicting network response, detecting anomalies and other tasks. Network generation, reconstruction, and prediction of its future topology are central issues of this field. In this project, we address the questions related to the understanding of the network modeling, investigating its structure and properties, and generating artificial networks. Most of the modern network generation methods are based either on various random graph models (reinforced by a set of properties such as power law distribution of node degrees, graph diameter, and number of triangles) or on the principle of replicating an existing model with elements of randomization such as R-MAT generator and Kronecker product modeling. Hierarchical models operate at different levels of network hierarchy but with the same finest elements of the network. However, in many cases the methods that include randomization and replication elements on the finest relationships between network nodes and modeling that addresses the problem of preserving a set of simplified properties do not fit accurately enough the real networks. Among the unsatisfactory features are numerically inadequate results, non-stability of algorithms on real (artificial) data, that have been tested on artificial (real) data, and incorrect behavior at different scales. One reason is that randomization and replication of existing structures can create conflicts between fine and coarse scales of the real network geometry. Moreover, the randomization and satisfying of some attribute at the same time can abolish those topological attributes that have been undefined or hidden from researchers. We propose to develop multilevel methods to model complex networks. The key point of the proposed strategy is that it will help to preserve part of the unknown structural attributes by guaranteeing the similar behavior of the real and artificial model on different scales.

Safro, I. M. (Mathematics and Computer Science)

2012-02-24T23:59:59.000Z

Note: This page contains sample records for the topic "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

On the Evolution of Thermonuclear Flames on Large Scales  

E-Print Network (OSTI)

The thermonuclear explosion of a massive white dwarf in a Type Ia supernova explosion is characterized by vastly disparate spatial and temporal scales. The extreme dynamic range inherent to the problem prevents the use of direct numerical simulation and forces modelers to resort to subgrid models to describe physical processes taking place on unresolved scales. We consider the evolution of a model thermonuclear flame in a constant gravitational field on a periodic domain. The gravitational acceleration is aligned with the overall direction of the flame propagation, making the flame surface subject to the Rayleigh-Taylor instability. The flame evolution is followed through an extended initial transient phase well into the steady-state regime. The properties of the evolution of flame surface are examined. We confirm the form of the governing equation of the evolution suggested by Khokhlov (1995). The mechanism of vorticity production and the interaction between vortices and the flame surface are discussed. The results of our investigation provide the bases for revising and extending previous subgrid-scale model.

Ju Zhang; O. E. Bronson Messer; Alexei M. Khokhlov; Tomasz Plewa

2006-10-05T23:59:59.000Z

362

Improved Bounds for Large Scale Capacitated Arc Routing Problem  

E-Print Network (OSTI)

ply a modified Iterated Local Search procedure to Capacitated Vehicle .... enter and leave the set S, in such a way that at least 2k(S) ? |?R(S)| times an ...... algorithm clearly outperformed, in terms of solution quality, those that dealt with large.

2011-09-29T23:59:59.000Z

363

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

364

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

365

Fraud detection on large scale social networks Yaya Sylla (1), (2), Pierre Morizet-Mahoudeaux (1)  

E-Print Network (OSTI)

Fraud detection on large scale social networks Yaya Sylla (1), (2), Pierre Morizet-Mahoudeaux (1 new methods and tools for detecting fraud and other crimes against banks and customers. Fraud-Large scale graphs analysis; graph partition and clustering; parallel processing; fraud detection I

Paris-Sud XI, Université de

366

GridMate: A Portable Simulation Environment for Large-Scale Adaptive Scientific Applications  

E-Print Network (OSTI)

GridMate: A Portable Simulation Environment for Large-Scale Adaptive Scientific Applications: parashar@caip.rutgers.edu Abstract--In this paper, we present a portable sim- ulation environment GridMate for large-scale adaptive scientific applications in multi-site Grid environments. GridMate is a discrete

Li, Xiaolin "Andy"

367

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

368

Molten Gallium as a Catalyst for the Large-Scale Growth of Highly Aligned Silica Nanowires  

E-Print Network (OSTI)

Molten Gallium as a Catalyst for the Large-Scale Growth of Highly Aligned Silica Nanowires Zheng a small size (5-100 nm in diameter), high melting point metal (such as gold and iron) catalyst particle as an effective catalyst for the large-scale growth of highly aligned, closely packed silica nanowire bunches

Wang, Zhong L.

369

Empirical Evidence of Large-Scale Diversity in API Usage of Object-Oriented Software  

E-Print Network (OSTI)

Empirical Evidence of Large-Scale Diversity in API Usage of Object-Oriented Software Diego Mendez. This is not an exception, our experiment provides us with empirical evidence that a large scale diversity exists in "API usage"1 . 1We use the term "API usage" to reuse the same term as close work [5]. In this case, "API

Paris-Sud XI, Université de

370

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

371

Role of large scale storage in a UK low carbon energy future Philipp Grunewalda  

E-Print Network (OSTI)

round trip efficiency, both compressed air energy storage and hydrogen storage could become potentialRole of large scale storage in a UK low carbon energy future Philipp Gr¨unewalda , Tim Cockerilla Large scale storage offers the prospect of using excess electricity within a low carbon energy system

372

Visualizing a Large-Scale Structure of Production Network by N-Body Simulation  

Science Journals Connector (OSTI)

......forming specialized production flows. An example...Air-Water Industrial Gas (17/18), Kyowa...Large-Scale Structure of Production Network 171 4...the computational cost is largest for the...the calculation cost being preferred...Large-Scale Structure of Production Network 173 Fig......

Yoshi Fujiwara

2009-03-01T23:59:59.000Z

373

Water Consumption Footprint and Land Requirements of Large-Scale Alternative  

E-Print Network (OSTI)

Water Consumption Footprint and Land Requirements of Large-Scale Alternative Diesel and Jet Fuel Consumption Footprint and Land Requirements of Large- Scale Alternative Diesel and Jet Fuel Production Mark D and the economic and social implications of policy alternatives. Ronald G. Prinn and John M. Reilly, Program Co

374

A vectorial DEVS extension for large scale system modeling and parallel simulation  

Science Journals Connector (OSTI)

In this article we introduce an extension to the Discrete Event System (DEVS) formalism called Vectorial DEVS (VECDEVS) that allows to represent large scale systems in a graphic block diagram way. A pure VECDEVS model basically consist in an array of ... Keywords: DEVS, large scale modeling, load balancing, parallel simulation

Federico Bergero, Ernesto Kofman

2014-05-01T23:59:59.000Z

375

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

376

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

377

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

378

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

379

An Isofactorial Change-of-Scale Model for the Wind Speed Probability Density Function  

Science Journals Connector (OSTI)

The wind speed probability density function (PDF) is used in a variety of applications in meteorology, oceanography, and climatology usually as a dataset comparison tool of a function of a quantity such as momentum flux or wind power density. The ...

Mark L. Morrissey; Angie Albers; J. Scott Greene; Susan Postawko

2010-02-01T23:59:59.000Z

380

On the Evolution of Thermonuclear Flames on Large Scales  

Science Journals Connector (OSTI)

The thermonuclear explosion of a massive white dwarf in a Type Ia supernova explosion is characterized by vastly disparate spatial and temporal scales. The extreme dynamic range inherent to the problem prevents the use of direct numerical simulation and forces modelers to resort to subgrid models to describe physical processes taking place on unresolved scales. We consider the evolution of a model thermonuclear flame in a constant gravitational field on a periodic domain. The gravitational acceleration is aligned with the overall direction of the flame propagation, making the flame surface subject to the Rayleigh-Taylor instability. The flame evolution is followed through an extended initial transient phase well into the steady state regime. The properties of the evolution of flame surface are examined. We confirm the form of the governing equation of the evolution suggested by Khokhlov in 1995. The mechanism of vorticity production and the interaction between vortices and the flame surface are discussed. Previously observed periodic behavior of the flame evolution is reproduced and is found to be caused by the turnover of the largest eddies. The characteristic timescales are found to be similar to the turnover time of these eddies. Relations between flame surface creation and destruction processes and basic characteristics of the flow are discussed. We find that the flame surface creation strength is associated with the Rayleigh-Taylor timescale. Also, in fully developed turbulence, the flame surface destruction strength scales as 1/L3, where L is the turbulent driving scale. The results of our investigation provide support for Khokhlov's self-regulating model of turbulent thermonuclear flames. Based on these results, one can revise and extend the original model. The revision uses a local description of the flame surface enhancement and the evolution of the flame surface since the onset of turbulence, rendering it free from the assumption of an instantaneous steady state of turbulence. This new model can be applied to the initial transient phase of the flame evolution, where the self-regulation mechanism yet to be fully established. Details of this new model will be presented in a forthcoming paper.

Ju Zhang; O. E. Bronson Messer; Alexei M. Khokhlov; Tomasz Plewa

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

The importance of combined cycle generating plants in integrating large levels of wind power generation  

SciTech Connect

Integration of high wind penetration levels will require fast-ramping combined cycle and steam cycles that, due to higher operating costs, will require proper pricing of ancillary services or other forms of compensation to remain viable. Several technical and policy recommendations are presented to help realign the generation mix to properly integrate the wind. (author)

Puga, J. Nicolas

2010-08-15T23:59:59.000Z

382

Large-scale Renewable Energy Projects (Larger than 10 MWs) | Department of  

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

Large-scale Renewable Energy Projects (Larger than 10 MWs) Large-scale Renewable Energy Projects (Larger than 10 MWs) Large-scale Renewable Energy Projects (Larger than 10 MWs) October 7, 2013 - 9:32am Addthis Renewable energy projects larger than 10 megawatts (MW) are complex and typically require private-sector financing. The Federal Energy Management Program (FEMP) developed a guide to help Federal agencies, and the developers and financiers that work with them, to successfully install these projects at Federal facilities. The Large-Scale Renewable Energy Guide: Developing Renewable Energy Projects Larger than 10 MWs at Federal Facilities: A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital provides a framework to allow the Federal Government, private developers, and financiers to work in a

383

Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit  

Open Energy Info (EERE)

Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme Jump to: navigation, search Name Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme Agency/Company /Organization European Climate Foundation Sector Energy Focus Area Energy Efficiency, Buildings, - Building Energy Efficiency Topics Co-benefits assessment, Background analysis Resource Type Publications Website http://3csep.ceu.hu/sites/defa Country Hungary UN Region Eastern Europe References Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme[1] Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme Screenshot "The goal of the present research was to gauge the net employment impacts of a largescale deep building energy-efficiency renovation programme in

384

Strategies to Finance Large-Scale Deployment of Renewable Energy Projects:  

Open Energy Info (EERE)

Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Agency/Company /Organization: International Energy Agency (IEA) Sector: Energy Focus Area: Renewable Energy Topics: Finance, Implementation, Policies/deployment programs Resource Type: Publications Website: iea-retd.org/archives/publications/finance-re Cost: Free Language: English Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Screenshot References: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach[1]

385

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

386

Large Scales - Long Times: Adding High Energy Resolution to SANS  

E-Print Network (OSTI)

The Neutron Spin Echo (NSE) variant MIEZE (Modulation of IntEnsity by Zero Effort), where all beam manipulations are performed before the sample position, offers the possibility to perform low background SANS measurements in strong magnetic fields and depolarising samples. However, MIEZE is sensitive to differences \\DeltaL in the length of neutron flight paths through the instrument and the sample. In this article, we discuss the major influence of \\DeltaL on contrast reduction of MIEZE measurements and its minimisation. Finally we present a design case for enhancing a small-angle neutron scattering (SANS) instrument at the planned European Spallation Source (ESS) in Lund, Sweden, using a combination of MIEZE and other TOF options, such as TISANE offering time windows from ns to minutes. The proposed instrument allows studying fluctuations in depolarizing samples, samples exposed to strong magnetic fields, and spin-incoherently scattering samples in a straightforward way up to time scales of \\mus at momentum ...

Brandl, G; Huler, W; Mhlbauer, S; Bni, P

2011-01-01T23:59:59.000Z

387

Cryogenic Control Architecture for Large-Scale Quantum Computing  

E-Print Network (OSTI)

Solid-state qubits have recently advanced to the level that enables them, in-principle, to be scaled-up into fault-tolerant quantum computers. As these physical qubits continue to advance, meeting the challenge of realising a quantum machine will also require the engineering of new classical hardware and control architectures with complexity far beyond the systems used in today's few-qubit experiments. Here, we report a micro-architecture for controlling and reading out qubits during the execution of a quantum algorithm such as an error correcting code. We demonstrate the basic principles of this architecture in a configuration that distributes components of the control system across different temperature stages of a dilution refrigerator, as determined by the available cooling power. The combined setup includes a cryogenic field-programmable gate array (FPGA) controlling a switching matrix at 20 millikelvin which, in turn, manipulates a semiconductor qubit.

J. M. Hornibrook; J. I. Colless; I. D. Conway Lamb; S. J. Pauka; H. Lu; A. C. Gossard; J. D. Watson; G. C. Gardner; S. Fallahi; M. J. Manfra; D. J. Reilly

2014-09-08T23:59:59.000Z

388

Feasibility of Large-Scale Ocean CO2 Sequestration  

SciTech Connect

Scientific knowledge of natural clathrate hydrates has grown enormously over the past decade, with spectacular new findings of large exposures of complex hydrates on the sea floor, the development of new tools for examining the solid phase in situ, significant progress in modeling natural hydrate systems, and the discovery of exotic hydrates associated with sea floor venting of liquid CO{sub 2}. Major unresolved questions remain about the role of hydrates in response to climate change today, and correlations between the hydrate reservoir of Earth and the stable isotopic evidence of massive hydrate dissociation in the geologic past. The examination of hydrates as a possible energy resource is proceeding apace for the subpermafrost accumulations in the Arctic, but serious questions remain about the viability of marine hydrates as an economic resource. New and energetic explorations by nations such as India and China are quickly uncovering large hydrate findings on their continental shelves. In this report we detail research carried out in the period October 1, 2007 through September 30, 2008. The primary body of work is contained in a formal publication attached as Appendix 1 to this report. In brief we have surveyed the recent literature with respect to the natural occurrence of clathrate hydrates (with a special emphasis on methane hydrates), the tools used to investigate them and their potential as a new source of natural gas for energy production.

Peter Brewer

2008-08-31T23:59:59.000Z

389

Edit paper Methods for Large Scale Hydraulic Fracture Monitoring  

E-Print Network (OSTI)

In this paper we propose computationally efficient and robust methods for estimating the moment tensor and location of micro-seismic event(s) for large search volumes. Our contribution is two-fold. First, we propose a novel joint-complexity measure, namely the sum of nuclear norms which while imposing sparsity on the number of fractures (locations) over a large spatial volume, also captures the rank-1 nature of the induced wavefield pattern. This wavefield pattern is modeled as the outer-product of the source signature with the amplitude pattern across the receivers from a seismic source. A rank-1 factorization of the estimated wavefield pattern at each location can therefore be used to estimate the seismic moment tensor using the knowledge of the array geometry. In contrast to existing work this approach allows us to drop any other assumption on the source signature. Second, we exploit the recently proposed first-order incremental projection algorithms for a fast and efficient implementation of the resulting...

Ely, Gregory

2013-01-01T23:59:59.000Z

390

Impact of Increasing Distributed Wind Power and Wind Turbine Siting on Rural Distribution Feeder Voltage Profiles: Preprint  

SciTech Connect

Many favorable wind energy resources in North America are located in remote locations without direct access to the transmission grid. Building transmission lines to connect remotely-located wind power plants to large load centers has become a barrier to increasing wind power penetration in North America. By connecting utility-sized megawatt-scale wind turbines to the distribution system, wind power supplied to consumers could be increased greatly. However, the impact of including megawatt-scale wind turbines on distribution feeders needs to be studied. The work presented here examined the impact that siting and power output of megawatt-scale wind turbines have on distribution feeder voltage. This is the start of work to present a general guide to megawatt-scale wind turbine impact on the distribution feeder and finding the amount of wind power that can be added without adversely impacting the distribution feeder operation, reliability, and power quality.

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

2013-09-01T23:59:59.000Z

391

Large Scale CW ECRH Systems: Meeting a Challenge  

SciTech Connect

Electron Cyclotron Resonance Heating (ECRH) systems for next step-fusion devices like W7-X and ITER operate in CW-mode and provide a large flexibility to comply with various physics demands such as plasma start-up, heating and current drive, as well as configuration and MHD control. The request for many different sophisticated applications results in a growing complexity of the systems. This is in conflict with the request for high availability, reliability, and maintainability, which arises from DEMO demands. 'Advanced' ECRH-components must, therefore, comply with both the complex physics demands and operational robustness and reliability. The W7-X ECRH system is the first CW facility of an ITER relevant size and is used as a test bed for such components. Results on improvements of gyrotrons, transmission components and launchers are presented together with proposals for future developments.

Erckmann, V.; Braune, H.; Laqua, H. P.; Marushchenko, N. B.; Michel, G. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, Teilinstitut Greifswald, D-17491 Greifswald (Germany); Kasparek, W.; Plaum, B.; Lechte, C.; Stuttgart, IPF [Institut fuer Plasmaforschung, Universitaet Stuttgart, D-70569 Stuttgart (Germany); Petelin, M. I.; Lubiako, L. [Institute of Applied Physics, RAS, 603950 Nizhny Novgorod (Russian Federation); Bruschi, A.; D'Arcangelo, O.; Bin, W. [Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, I-20125 Milano (Italy); Van Den Braber, R.; Doelman, N. [Dept. of Mechatronic Equipment, TNO Science and Industry, NL-2600 Delft (Netherlands); Gantenbein, G.; Thumm, M. [Karlsruher Institut fuer Technologie, KIT, Association EURATOM-KIT, IHM, D-76021 Karlsruhe (Germany)

2011-12-23T23:59:59.000Z

392

Design and evaluation of large scale pultruded fiberglass tubular structures  

SciTech Connect

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

393

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

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

66.7 Million for Large-Scale Carbon 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 Regional Partner to Demonstrate Safe and Permanent Storage of One Million Tons of CO2 at Illinois Site WASHINGTON, DC - Following closely on the heels of three recent awards through the Department of Energy's (DOE) Regional Carbon Sequestration Partnership Program, DOE today awarded $66.7 million to the Midwest Geological Sequestration Consortium (MGSC) for the Department's fourth large-scale carbon sequestration project. The Partnership led by the Illinois State Geological Survey will conduct large volume tests in the Illinois Basin to demonstrate the ability of a geologic formation to

394

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

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

$126.6 Million for Two More Large-Scale Carbon $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 Projects in California and Ohio Join Four Others in Effort to Drastically Reduce Greenhouse Gas Emissions WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced awards of more than $126.6 million to the West Coast Regional Carbon Sequestration Partnership (WESTCARB) and the Midwest Regional Carbon Sequestration Partnership (MRCSP) for the Department's fifth and sixth large-scale carbon sequestration projects. These industry partnerships, which are part of DOE's Regional Carbon Sequestration Partnership, will conduct large volume tests in California and Ohio to demonstrate the ability of a geologic

395

First U.S. Large-Scale CO2 Storage Project Advances | Department of Energy  

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

First U.S. Large-Scale CO2 Storage Project Advances First U.S. Large-Scale CO2 Storage Project Advances First U.S. Large-Scale CO2 Storage Project Advances April 6, 2009 - 1:00pm Addthis Washington, DC - Drilling nears completion for the first large-scale carbon dioxide (CO2) injection well in the United States for CO2 sequestration. This project will be used to demonstrate that CO2 emitted from industrial sources - such as coal-fired power plants - can be stored in deep geologic formations to mitigate large quantities of greenhouse gas emissions. The Archer Daniels Midland Company (ADM) hosted an event April 6 for a CO2 injection test at their Decatur, Ill. ethanol facility. The injection well is being drilled into the Mount Simon Sandstone to a depth more than a mile beneath the surface. This is the first drilling into the sandstone geology

396

NREL: Wind Research - Research and Development  

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

Printable Version Wind Research Home Research & Development Utility-Scale Wind Turbines Offshore Wind Turbines Small Wind Turbines Grid Integration Market Acceleration...

397

Method for large-scale fabrication of atomic-scale structures on material surfaces using surface vacancies  

DOE Patents (OSTI)

A method for forming atomic-scale structures on a surface of a substrate on a large-scale includes creating a predetermined amount of surface vacancies on the surface of the substrate by removing an amount of atoms on the surface of the material corresponding to the predetermined amount of the surface vacancies. Once the surface vacancies have been created, atoms of a desired structure material are deposited on the surface of the substrate to enable the surface vacancies and the atoms of the structure material to interact. The interaction causes the atoms of the structure material to form the atomic-scale structures.

Lim, Chong Wee (Urbana, IL); Ohmori, Kenji (Urbana, IL); Petrov, Ivan Georgiev (Champaign, IL); Greene, Joseph E. (Champaign, IL)

2004-07-13T23:59:59.000Z

398

DOE Study finds U.S. Wind Industry Competitive, Efficient, and Capable on a Global Scale  

Office of Energy Efficiency and Renewable Energy (EERE)

The Global Wind Network recently completed an Energy Department funded study that took a critical look at U.S. wind industry manufacturers ability to compete in the global marketplace and their readiness to supply the next generation of wind turbines. The study found that the U.S. turbine component manufacturers maintained the lowest cost on blades and had the most efficient manufacturing processes on towers, blades, and generators when compared to other major global suppliers.

399

The Sun and the solar wind variability of different time-scales and the climate dynamics  

Science Journals Connector (OSTI)

The role and place of the solar wind energy in the whole spectra of the solar emissions, which could influence Earth's climate dynamics are investigated. Reliable indicators of the direct coupling between the solar wind disturbances and the temperature short-term variations in the high-latitude stratosphere are presented. In the long-terms (several solar cycles), variations of the solar wind dynamic pressure are similar to the correspondent total solar irradiance (TSI) temporal changes.

L.N Makarova; A.V Shirochkov

2004-01-01T23:59:59.000Z

400

NREL Controllable Grid Interface for Testing MW-scale Wind Turbine...  

Office of Scientific and Technical Information (OSTI)

Main Specifications References In order to understand the behavior of wind turbines experiencing grid disturbances, it is necessary to perform a series of tests and...

Note: This page contains sample records for the topic "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

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.

402

Numerical Simulation of the Irish Wind Climate and Comparison with Wind  

Open Energy Info (EERE)

Numerical Simulation of the Irish Wind Climate and Comparison with Wind Numerical Simulation of the Irish Wind Climate and Comparison with Wind Atlas Data Dataset Summary Description (Abstract): The wind climate of Ireland has been calculated using the Karlsruhe Atmospheric Mesoscale Model KAMM using the statistical-dynamical method. The large-scale climatology is represented by 65 classes of geostropic wind. From the frequency of the classes and the simulations the climatology of the surface wind is determined. The simulated winds are processed similar to observed data to obtain LIB-files for the Wind Atlas Analysis and Application Program WAsP. Comparisons are made with mast observations which have been analyzed by WAsP. Sites with high wind power potential are well predicted. Stations with low power are over predicted. (Purpose): Article describing an example of a KAMM

403

DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific  

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

Seeks Proposals for Expanded Large-Scale Seeks Proposals for Expanded Large-Scale Scientific Computing DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific Computing May 16, 2005 - 12:47pm Addthis WASHINGTON, D.C. -- Secretary of Energy Samuel W. Bodman announced today that DOE's Office of Science is seeking proposals to support innovative, large-scale computational science projects to enable high-impact advances through the use of advanced computers not commonly available in academia or the private sector. Projects currently funded are helping to reduce engine pollution and to improve our understanding of the stars and solar systems and human genetics. Successful proposers will be given the use of substantial computer time and data storage at the department's scientific

404

DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific  

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

DOE's Office of Science Seeks Proposals for Expanded Large-Scale DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific Computing DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific Computing May 16, 2005 - 12:47pm Addthis WASHINGTON, D.C. -- Secretary of Energy Samuel W. Bodman announced today that DOE's Office of Science is seeking proposals to support innovative, large-scale computational science projects to enable high-impact advances through the use of advanced computers not commonly available in academia or the private sector. Projects currently funded are helping to reduce engine pollution and to improve our understanding of the stars and solar systems and human genetics. Successful proposers will be given the use of substantial computer time and data storage at the department's scientific

405

Large-Scale Residential Energy Efficiency Programs Based on CFLs | Open  

Open Energy Info (EERE)

Large-Scale Residential Energy Efficiency Programs Based on CFLs Large-Scale Residential Energy Efficiency Programs Based on CFLs Jump to: navigation, search Tool Summary Name: Large-Scale Residential Energy Efficiency Programs Based on CFLs Agency/Company /Organization: Energy Sector Management Assistance Program of the World Bank Sector: Energy Focus Area: Energy Efficiency, Buildings Topics: Implementation, Policies/deployment programs Website: www.esmap.org/filez/pubs/216201021421_CFL_Toolkit_Web_Version_021610_R References: Large-Scale Residential Energy Efficiency Programs Based on CFLs[1] Overview "The World Bank Group and its Energy Sector Management Assitance Progamme (ESMAP) have produced a toolkit for efficient lighting programmes, based on compact fluorescent lamps, that compiles and shares operational (design,

406

ARM - PI Product - Large Scale Ice Water Path and 3-D Ice Water Content  

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

ProductsLarge Scale Ice Water Path and 3-D Ice Water ProductsLarge Scale Ice Water Path and 3-D Ice Water Content Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Large Scale Ice Water Path and 3-D Ice Water Content Site(s) SGP TWP General Description 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

407

Model-Constrained Optimization Methods for Reduction of Parameterized Large-Scale Systems  

E-Print Network (OSTI)

Most model reduction techniques employ a projection framework that utilizes a reduced-space basis. The basis is usually formed as the span of a set of solutions of the large-scale system, which are computed for selected ...

Tan, Bui-Thanh

408

Model-constrained optimization methods for reduction of parameterized large-scale systems  

E-Print Network (OSTI)

Most model reduction techniques employ a projection framework that utilizes a reduced-space basis. The basis is usually formed as the span of a set of solutions of the large-scale system, which are computed for selected ...

Bui-Thanh, Tan

2007-01-01T23:59:59.000Z

409

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

410

Web-Queryable Large-Scale Data Sets for Hypothesis Generation in Plant Biology  

Science Journals Connector (OSTI)

...improve function prediction are key to...understanding the plant as a collection...technology and machine learning methods, short...that mediate disease resistance...to available plant large-scale...gene function prediction, similar to...

Siobhan M. Brady; Nicholas J. Provart

2009-04-28T23:59:59.000Z

411

Large-Scale Risk As a Problem Of Technological, Psychological and Political Judgment  

Science Journals Connector (OSTI)

The purpose of this paper is to identify, order, and explain basic concepts, problems, and issues in what may be called the societal debate on large-scale risks. In Section 2 the problem is introduced with a d...

Charles Vlek; Hans Kuyper; Henk Boer

1985-01-01T23:59:59.000Z

412

Energy-Aware Resource Management and Green Energy Use for Large-Scale Datacenters: A Survey  

Science Journals Connector (OSTI)

As cloud computing gains a lot of attention that provides various service abilities, large-scale datacenters become dominant components of the cloud infrastructure. Huge energy consumption appears to be nonignora...

Xiaoying Wang; Xiaojing Liu; Lihua Fan

2014-01-01T23:59:59.000Z

413

Representing Knowledge of LargeScale Space 1 Benjamin Jack Kuipers  

E-Print Network (OSTI)

Representing Knowledge of Large­Scale Space 1 Benjamin Jack Kuipers July 1977 1 B. J. Kuipers. 1977, and Mark Jeffery. Continuing discussions with Al Stevens have been pleasurable and helpful. My wife Laura

Kuipers, Benjamin

414

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

415

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

NLE Websites -- All DOE Office Websites (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,...

416

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

417

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

418

FEMP Helps Federal Facilities Develop Large-Scale Renewable Energy Projects  

Office of Energy Efficiency and Renewable Energy (EERE)

FEMP developed a guide to help federal agencies, as well as the developers and financiers that work with them, to successfully install large-scale renewable energy projects at federal facilities.

419

Fact Sheet -- Keeping up with the wind: BPA actions support increasing...  

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

need to address large-scale wind integration issues. Because of the high and increasing penetration rate of wind in the BPA balancing authority, we must address them now....

420

E-Print Network 3.0 - aero-elastic offshore wind Sample Search...  

NLE Websites -- All DOE Office Websites (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...

Note: This page contains sample records for the topic "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

Oscillation analysis of a DFIG-based wind farm interfaced with LCC-HVDC  

Science Journals Connector (OSTI)

With the increasing capacity of wind farm, HVDC technology has become a promising transmission scheme for long distance transportation of large-scale wind power. However oscillation caused by this system will hav...

Lin Yang; XiangNing Xiao; ChengZong Pang

2014-12-01T23:59:59.000Z

422

Environmental geophysics deals with issues ranging from local-scale fluid-rock changes to large-scale climatic  

E-Print Network (OSTI)

Environmental geophysics deals with issues ranging from local-scale fluid-rock changes to large and quarries, military bases, oil and gas fields, petroleum refineries, etc. Many derelict sites such as crankcase oils), mine spoils, and other inorganic pollutants. Accidental spills or poor disposal practice

Meju, Max

423

Solar Power in the Desert: Are the current large-scale solar developments really improving Californias 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 Californias

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

424

Reliability Evaluation of Offshore Wind Energy Networks and the Dutch Power System:.  

E-Print Network (OSTI)

??In the future, a large-scale expansion of offshore wind energy is expected in the Netherlands. For this large-scale expansion, a well-designed offshore network is needed. (more)

Tuinema, B.W.

2009-01-01T23:59:59.000Z

425

WindPACT Turbine Design Scaling Studies Technical Area 1ŒComposite Blades for 80- to 120-Meter Rotor  

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

1 * NREL/SR-500-29492 1 * NREL/SR-500-29492 Dayton A. Griffin Global Energy Concepts Kirkland, Washington WindPACT Turbine Design Scaling Studies Technical Area 1-Composite Blades for 80- to 120-Meter Rotor March 21, 2000 - March 15, 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 April 2001 * NREL/SR-500-29492 WindPACT Turbine Design Scaling Studies Technical Area 1-Composite Blades for 80- to 120-Meter Rotor March 21, 2000 - March 15, 2001 Dayton A. Griffin Global Energy Concepts Kirkland, Washington NREL Technical Monitor: Alan Laxson Prepared under Subcontract No. YAM-0-30203-01 National Renewable Energy Laboratory

426

WindPACT Turbine Design Scaling Studies Technical Area 3ŒSelf-Erecting Tower and Nacelle Feasibility  

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

1 * NREL/SR-500-29493 1 * NREL/SR-500-29493 Global Energy Concepts, LLC Kirkland, Washington WindPACT Turbine Design Scaling Studies Technical Area 3-Self-Erecting Tower and Nacelle Feasibility March 2000-March 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 May 2001 * NREL/SR-500-29493 WindPACT Turbine Design Scaling Studies Technical Area 3-Self-Erecting Tower and Nacelle Feasibility March 2000-March 2001 Global Energy Concepts, LLC Kirkland, Washington NREL Technical Monitor: Alan Laxson Prepared under Subcontract No. YAM-0-30203-01 National Renewable Energy Laboratory 1617 Cole Boulevard

427

How Much Energy Is Transferred from the Winds to the Thermocline on ENSO Time Scales?  

Science Journals Connector (OSTI)

The dynamics of El NioSouthern Oscillation (ENSO) are studied in terms of the balance between energy input from the winds (via wind power) and changes in the storage of available potential energy in the tropical ocean. Presently, there are ...

Jaclyn N. Brown; Alexey V. Fedorov

2010-03-01T23:59:59.000Z

428

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

429

New report assesses offshore wind technology challenges and potential risks and benefits.  

E-Print Network (OSTI)

New report assesses offshore wind technology challenges and potential risks and benefits of the offshore wind energy industry, Large-Scale Offshore Wind Power in the United States. It provides a broad understanding of the offshore wind resource, and details the associated technology challenges, econom- ics

430

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

431

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

432

Energy Department Accepting Small Business Grant Applications for Large Wind Turbines  

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

The Energy Department began accepting applications on November 24 for its FY 2015 Phase 1 grant topics, including a Wind Program topic, under the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs to help small businesses develop and deliver market-driven clean energy technologies.

433

Nuclear EMP simulation for large-scale urban environments. FDTD for electrically large problems.  

SciTech Connect

In case of a terrorist nuclear attack in a metropolitan area, EMP measurement could provide: (1) a prompt confirmation of the nature of the explosion (chemical or nuclear) for emergency response; and (2) and characterization parameters of the device (reaction history, yield) for technical forensics. However, urban environment could affect the fidelity of the prompt EMP measurement (as well as all other types of prompt measurement): (1) Nuclear EMP wavefront would no longer be coherent, due to incoherent production, attenuation, and propagation of gamma and electrons; and (2) EMP propagation from source region outward would undergo complicated transmission, reflection, and diffraction processes. EMP simulation for electrically-large urban environment: (1) Coupled MCNP/FDTD (Finite-difference time domain Maxwell solver) approach; and (2) FDTD tends to be limited to problems that are not 'too' large compared to the wavelengths of interest because of numerical dispersion and anisotropy. We use a higher-order low-dispersion, isotropic FDTD algorithm for EMP propagation.

Smith, William S. [Los Alamos National Laboratory; Bull, Jeffrey S. [Los Alamos National Laboratory; Wilcox, Trevor [Los Alamos National Laboratory; Bos, Randall J. [Los Alamos National Laboratory; Shao, Xuan-Min [Los Alamos National Laboratory; Goorley, John T. [Los Alamos National Laboratory; Costigan, Keeley R. [Los Alamos National Laboratory

2012-08-13T23:59:59.000Z

434

A full-scale approximation of covariance functions for large spatial data sets  

E-Print Network (OSTI)

A full-scale approximation of covariance functions for large spatial data sets Huiyan Sang in spatial statistics but face tremendous computational challenges for very large data sets. The model fitting and spatial prediction of such models typically require O(n3 ) operations for a data set of size n

Huang, Jianhua

435

Polar firn air reveals large-scale impact of anthropogenic mercury emissions during the 1970s  

Science Journals Connector (OSTI)

...exhibit a similar trend: a large decrease during...reservoirs occurs on a large scale. The connection...Asia has become the largest contributor of anthropogenic...19, 56) from one borehole at depths of 15, 25...into the borehole after drilling to the sampling depth...

Xavier Fan; Christophe P. Ferrari; Aurlien Dommergue; Mary R. Albert; Mark Battle; Jeff Severinghaus; Laurent Arnaud; Jean-Marc Barnola; Warren Cairns; Carlo Barbante; Claude Boutron

2009-01-01T23:59:59.000Z

436

TradeWind Energy LLC | Open Energy Information  

Open Energy Info (EERE)

TradeWind Energy LLC TradeWind Energy LLC Jump to: navigation, search Name TradeWind Energy LLC Place Lenexa, Kansas Zip 66214 Sector Renewable Energy, Wind energy Product TradeWind Energy is a developer of renewable energy in Kansas and the surrounding midwestern states. It develops large-scale wind energy projects. Enel North America is a strategic partner for TradeWind and has taken an equity stake in the company. References TradeWind Energy LLC[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. TradeWind Energy LLC is a company located in Lenexa, Kansas . References ↑ "TradeWind Energy LLC" Retrieved from "http://en.openei.org/w/index.php?title=TradeWind_Energy_LLC&oldid=352361

437

Physical modeling of wind turbine generators in a small scale analog system  

E-Print Network (OSTI)

This project represents the physical modeling and experimental test of a Doubly-fed Induction Machine (DFIM), in order to substantially analyze the characteristic behaviors of wind turbines and its use in the micro-grid ...

Wang, Xuntuo

2014-01-01T23:59:59.000Z

438

A Minnesota Blizzard Provides Insight into Utility-Scale Wind Turbine Wakes  

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

Starting in 2012, researchers tried placing spotlights downwind from the 2.5-megawatt (MW) wind turbine in Rosemount, Minnesota. The research team was attempting to study turbulent airflow around a turbine in the field.

439

Wind-Tunnel Simulation of the Wake of a Large Wind Turbine in a Stable Boundary Layer. Part 1: The Boundary-Layer Simulation  

Science Journals Connector (OSTI)

Measurements have been made in both a neutral and a stable boundary layer as part of an investigation of the wakes of wind turbines in an offshore environment, in the EnFlo stratified flow wind tunnel. The wor...

Philip E. Hancock; Frauke Pascheke

2014-04-01T23:59:59.000Z

440

Distributed Wind Energy in Idaho  

SciTech Connect

Project Objective: This project is a research and development program aimed at furthering distributed wind technology. In particular, this project addresses some of the barriers to distributed wind energy utilization in Idaho. Background: At its core, the technological challenge inherent in Wind Energy is the transformation of a highly variable form of energy to one which is compatible with the commercial power grid or another useful application. A major economic barrier to the success of distributed wind technology is the relatively high capital investment (and related long payback periods) associated with wind turbines. This project will carry out fundamental research and technology development to address both the technological and economic barriers. â?¢ Active drive train control holds the potential to improve the overall efficiency of a turbine system by allowing variable speed turbine operation while ensuring a tight control of generator shaft speed, thus greatly simplifying power conditioning. â?¢ Recent blade aerodynamic advancements have been focused on large, utility-scale wind turbine generators (WTGs) as opposed to smaller WTGs designed for distributed generation. Because of Reynolds Number considerations, blade designs do not scale well. Blades which are aerodynamically optimized for distributed-scale WTGs can potentially reduce the cost of electricity by increasing shaft-torque in a given wind speed. â?¢ Grid-connected electric generators typically operate at a fixed speed. If a generator were able to economically operate at multiple speeds, it could potentially convert more of the windâ??s energy to electricity, thus reducing the cost of electricity. This research directly supports the stated goal of the Wind and Hydropower Technologies Program for Distributed Wind Energy Technology: By 2007, reduce the cost of electricity from distributed wind systems to 10 to 15 cents/kWh in Class 3 wind resources, the same level that is currently achievable in Class 5 winds.

Gardner, John; Ferguson, James; Ahmed-Zaid, Said; Johnson, Kathryn; Haynes, Todd; Bennett, Keith

2009-01-31T23:59:59.000Z

Note: This page contains sample records for the topic "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

A Multiscale Wind and Power Forecast System for Wind Farms  

Science Journals Connector (OSTI)

Abstract A large scale introduction of wind energy in power sector causes a number of challenges for electricity market and wind farm operators who will have to deal with the variability and uncertainty in the wind power generation in their scheduling and trading decisions. Numerical wind power forecasting has been identified as an important tool to address the increasing variability and uncertainty and to more efficiently operate power systems with large wind power penetration. It has been observed that even when the wind magnitude and direction recorded at a wind mast are the same, the corresponding energy productions can vary significantly. In this work we try to introduce improvements by developing a more accurate wind forecast system for a complex terrain. The system has been operational for eight months for the Bessaker Wind Farm located in the middle part of Norway in a very complex terrain. Operational power curves have also been derived from data analysis. Although the methodology explained has been developed for an onshore wind farm, it can very well be utilized in an offshore context also.

Adil Rasheed; Jakob Kristoffer Sld; Trond Kvamsdal

2014-01-01T23:59:59.000Z

442

Hull Wind II: A Case Study of the Development of a Second Large Wind Turbine Installation in the Town of Hull, MA  

E-Print Network (OSTI)

; a capped landfill was chosen. Resource assessment took advantage of the Hull Wind I experience, nearby data made the wind power projects economically feasible; and a citizenry willing to participate actively for salt production. Hull's pursuit of modern wind power began more than 20 years ago, with the 1985

Massachusetts at Amherst, University of

443

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

444

Inflation that runs naturally: Gravitational waves and suppression of power at large and small scales  

E-Print Network (OSTI)

We point out three correlated predictions of the axion monodromy inflation model: large amplitude of gravitational waves, suppression of power on horizon scales and on scales relevant for the formation of dwarf galaxies. While these predictions are likely generic to models with oscillations in the inflaton potential, the axion monodromy model naturally accommodates the required running spectral index through Planck-scale corrections to the inflaton potential. Applying this model to a combined data set of Planck, ACT, SPT, and WMAP low-$\\ell$ polarization cosmic microwave background (CMB) data, we find a best-fit tensor-to-scalar ratio $r_{0.05} = 0.07^{+0.05}_{-0.04}$ due to gravitational waves, which may have been observed by the BICEP2 experiment. Despite the contribution of gravitational waves, the total power on large scales (CMB power spectrum at low multipoles) is lower than the standard $\\Lambda$CDM cosmology with a power-law spectrum of initial perturbations and no gravitational waves, thus mitigating some of the tension on large scales. There is also a reduction in the matter power spectrum of 20-30\\% at scales corresponding to $k = 10~{\\rm Mpc}^{-1}$, which are relevant for dwarf galaxy formation. This will alleviate some of the unsolved small-scale structure problems in the standard $\\Lambda$CDM cosmology.

Quinn E. Minor; Manoj Kaplinghat

2014-11-03T23:59:59.000Z

445

Wind Powering America: New England Wind Forum  

Wind Powering America (EERE)

About the New England Wind Forum About the New England Wind Forum New England Wind Energy Education Project Historic Wind Development in New England State Activities Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics Markets Siting Policy Technical Challenges Issues Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share The New England Wind Forum was conceived in 2005 as a platform to provide a single, comprehensive and objective source of up-to-date, Web-based information on a broad array of wind-energy-related issues pertaining to New England. The New England Wind Forum provides information to wind energy stakeholders through Web site features, periodic newsletters, and outreach activities. The New England Wind Forum covers the most frequently discussed wind energy topics.

446

Periodic variability in cetacean strandings: links to large-scale climate events  

Science Journals Connector (OSTI)

...and meridional (southerly) winds, reflecting general long-term...persistent zonal and meridional winds result in colder and presumably...School of Zoology, Antarctic Wildlife Research Unit, University of...Periodicity Tasmania Victoria Wind

2005-01-01T23:59:59.000Z

447

Sault Tribe Wind Energy Feasibility Study  

SciTech Connect

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

448

Large eddy simulation of wind turbine wake dynamics in the stable boundary layer using the Weather Research and Forecasting Model  

Science Journals Connector (OSTI)

Recently an actuator disk parameterization was implemented in the Weather Research and Forecasting (WRF) Model for large eddy simulation (LES) of wind turbine wakes. To thoroughly verify this model simulations of various types of turbines and atmospheric conditions must be evaluated against corresponding experimental data. In this work numerical simulations are compared to nacelle-based scanning lidar measurements taken in stable atmospheric conditions during a field campaign conducted at a wind farm in the western United States. Using several wake characteristicssuch as the velocity deficit centerline location and wake widthas metrics for model verification the simulations show good agreement with the observations. Notable results include a high average velocity deficit decreasing from 73% at a downwind distance x of 1.2 rotor diameters (D) to 25% at x?=?6.6D resulting from a low average wind speed and therefore high average turbine thrust coefficient. Moreover the wake width expands from 1.4D at x?=?1.2D to 2.3D at x?=?6.6D. Finally new featuresnamely rotor tilt and drag from the nacelle and towerare added to the existing actuator disk model in WRF-LES. Compared to the rotor the effect of the tower and nacelle on the flow is relatively small but nevertheless important for an accurate representation of the entire turbine. Adding rotor tilt to the model causes the vertical location of the wake center to shift upward. Continued advancement of the actuator disk model in WRF-LES will help lead to optimized turbine siting and controls at wind farms.

Matthew L. Aitken; Branko Kosovi?; Jeffrey D. Mirocha; Julie K. Lundquist

2014-01-01T23:59:59.000Z

449

U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion  

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

U.S. Signs U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion Energy Project to Begin Construction News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.21.06 U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion Energy Project to Begin Construction Print Text Size: A A A Subscribe FeedbackShare Page Large-Scale, Clean Fusion Energy Project to Begin Construction November 21, 2006 PARIS, FRANCE - Representing the United States, Dr. Raymond L. Orbach, Under Secretary for Science of the U.S. Department of Energy (DOE), today joined counterparts from China, the European Union, India, Japan, the

450

Clean Energy Solutions Large Scale CHP and Fuel Cells Program | Department  

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

Clean Energy Solutions Large Scale CHP and Fuel Cells Program Clean Energy Solutions Large Scale CHP and Fuel Cells Program Clean Energy Solutions Large Scale CHP and Fuel Cells Program < Back Eligibility Commercial Fed. Government Industrial Institutional Local Government Nonprofit State Government Savings Category Commercial Heating & Cooling Manufacturing Buying & Making Electricity Alternative Fuel Vehicles Hydrogen & Fuel Cells Maximum Rebate CHP: $3,000,000 or 30% of project costs Fuel Cells: $3,000,000 or 45% of project costs Program Info Start Date 01/17/2013 State New Jersey Program Type State Grant Program Rebate Amount CHP greater than 1 MW-3 MW: $0.55/wattt CHP > 3 MW: $0.35/watt Fuel Cells > 1 MW with waste heat utilization: $2.00/watt Fuel Cells > 1 MW without waste heat utilization: $1.50/watt

451

Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar  

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

Loan Guarantee Would Support Large-Scale Rooftop Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing September 7, 2011 - 2:10pm Addthis Washington D.C. - U.S. Energy Secretary Steven Chu today announced the offer of a conditional commitment for a partial guarantee of a $344 million loan that will support the SolarStrong Project, which is expected to be a record expansion of residential rooftop solar power in the United States. Under the SolarStrong Project, SolarCity Corporation will install, own and operate up to 160,000 rooftop solar installations on as many as 124 U.S. military bases in up to 33 states. SolarCity expects the project to fund approximately 750 construction jobs over five years and 28 full time

452

Regional climate consequences of large-scale cool roof and photovoltaic array deployment  

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

climate consequences of large-scale cool roof and photovoltaic array deployment climate consequences of large-scale cool roof and photovoltaic array deployment This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2011 Environ. Res. Lett. 6 034001 (http://iopscience.iop.org/1748-9326/6/3/034001) Download details: IP Address: 98.204.49.123 The article was downloaded on 01/07/2011 at 12:38 Please note that terms and conditions apply. View the table of contents for this issue, or go to the journal homepage for more Home Search Collections Journals About Contact us My IOPscience IOP PUBLISHING ENVIRONMENTAL RESEARCH LETTERS Environ. Res. Lett. 6 (2011) 034001 (9pp) doi:10.1088/1748-9326/6/3/034001 Regional climate consequences of large-scale cool roof and photovoltaic array deployment Dev Millstein and Surabi Menon Lawrence

453

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

454

NREL Confirms Large Potential for Grid Integration of Wind, Solar Power (Fact Sheet)  

SciTech Connect

To fully harvest the nation's bountiful wind and solar resources, it is critical to know how much electrical power from these renewable resources could be integrated reliably into the grid. To inform the discussion about the potential of such variable sources, the National Renewable Energy Laboratory (NREL) launched two key regional studies, examining the east and west sections of the U.S. power grid. The studies show that it is technically possible for U.S. power systems to integrate 20%-35% renewable electricity if infrastructure and operational improvements can be made.

Not Available

2011-10-01T23:59:59.000Z

455

European Wind Atlas: Offshore | Open Energy Information  

Open Energy Info (EERE)

European Wind Atlas: Offshore European Wind Atlas: Offshore Jump to: navigation, search Tool Summary LAUNCH TOOL Name: European Wind Atlas: Offshore Focus Area: Renewable Energy Topics: Potentials & Scenarios Website: www.windatlas.dk/Europe/oceanmap.html Equivalent URI: cleanenergysolutions.org/content/european-wind-atlas-offshore,http://c Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance This is a European offshore wind resources over open sea map developed by Riso National Laboratory in 1989. The map shows the so-called generalised wind climate over Europe, also sometimes referred to as the regional wind climate or simply the wind atlas. In such a map, the influences of local topography have been removed and only the variations on the large scale are

456

NREL: Computational Science - Wind Energy Simulations  

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

Wind Energy Simulations Wind Energy Simulations Scientists in the Computational Science Center at the National Renewable Energy Laboratory (NREL) are performing wind-farm computational fluid dynamics (CFD) and structural dynamics simulations that will provide a better understanding of the interactions of wind turbine wakes with one another, with the surrounding winds, and with the loads they impose on turbine blades and other components. Large-scale wind power generation deployment is a realistic and largely inevitable proposition as energy security, supply uncertainties, and global climate concerns drive the U.S. to develop diverse sources of domestic, clean, and renewable energy. The U.S. is currently on a path to produce 20% of its electricity from wind energy by 2030, which is a 10-fold increase

457

A survey on energy storage resources configurations in order to propose an optimum configuration for smoothing fluctuations of future large wind power plants  

Science Journals Connector (OSTI)

Abstract As the wind power capacity increases, the effect of wind power fluctuations on the system stability becomes more significant. Despite its high costs, utilizing energy storage resources such as batteries is inevitable in the smoothing process of wind power fluctuations. In a wind power plant, the place where batteries are located has considerable direct effect on their required capacity and thus on the initial investment cost. Therefore, in this paper a suitable configuration which significantly reduces the batteries investment cost is proposed and then the wind power fluctuation of a large wind power plant connected to a smart distribution grid is smoothed. Additionally, existing configurations for installing batteries in large wind power plants are investigated. The proposed configuration utilizes smart parks as aggregated storage resources in load side and an aggregated battery energy storage system with limited capacity in plant side as well. Therefore, in addition to accurate smoothing of wind power fluctuations, the energy storage investment cost is reduced significantly utilizing the proposed configuration. Simulation studies in MATLAB software package are carried out to verify the performance of the proposed approach.

M. Jannati; S.H. Hosseinian; B. Vahidi; Guo-Jie Li

2014-01-01T23:59:59.000Z

458

Grid planning with a large amount of small scale solar and wind power.  

E-Print Network (OSTI)

?? The total energy demand in the world is expected to increase in the future years due to thehigh development rate of developing countries. Access (more)

Fernndez Martnez, Alberto

2013-01-01T23:59:59.000Z

459

Large-scale Wind Power integration in a Hydro-Thermal Power Market.  

E-Print Network (OSTI)

?? This master thesis describes a quadratic programming model used to calculate the spot prices in an efficient multi-area power market. The model has been (more)

Trtscher, Thomas

2007-01-01T23:59:59.000Z

460

The influence of large-scale wind power on global climate  

Science Journals Connector (OSTI)

...of primary energy (1). The...role in global energy supply when...power is a renewable resource...of kinetic energy at the ?100-m...developed at the National Center for...for 50 yr of integration, {delta...horizontal grid) (7). Experiments...climate; the challenge is to relate...

David W. Keith; Joseph F. DeCarolis; David C. Denkenberger; Donald H. Lenschow; Sergey L. Malyshev; Stephen Pacala; Philip J. Rasch

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "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

The Universe on Very Large Scales: A View from the Las Campanas Redshift Survey  

E-Print Network (OSTI)

The Las Campanas Redshift Survey (LCRS) is among the first galaxy redshift surveys to sample a reasonably fair volume of the local Universe. On the largest scales (>> 100/h Mpc), the galaxy distribution appears smooth; on relatively small scales (<10/h Mpc), the LCRS tends to confirm the clustering characteristics observed in previous, shallower surveys. Here, however, we concern ourselves primarily with clustering on scales near the transition to homogeneity (50-200/h Mpc). We conclude that the general evidence tends to support enhanced clustering on ~ 100/h Mpc scales, but that this result should be confirmed with additional analyses of the LCRS dataset (especially 2D analyses) and with investigations of new and upcoming large-scale surveys covering different regions and/or having different selection effects.

D. L. Tucker; H. Lin; S. Shectman

1999-02-01T23:59:59.000Z

462

Coupled dynamic analysis of multiple wind turbines on a large single floater  

Science Journals Connector (OSTI)

Abstract The present study has developed a numerical simulation tool for the coupled dynamic analysis of multiple turbines on a single floater (or Multiple Unit Floating Offshore Wind Turbine (MUFOWT)) in the time domain including multiple-turbine aero-blade-tower dynamics and control, mooring dynamics, and platform motions. The numerical tool developed in this study was designed based on and extended from the single-turbine analysis tool FAST to be suitable for multiple turbines. For hydrodynamic loadings of floating platform and mooring-line dynamics, the CHARM3D program developed by the authors was incorporated. Thus, the coupled dynamic behavior of a floating base with multiple turbines and mooring lines can be simulated in the time domain. The developed MUFOWT analysis tool can compute any type of floating platform with multiple horizontal-axis wind turbines (HAWT). To investigate the dynamic coupling effect between platform and each turbine, one turbine failure case with a fully broken blade was simulated and checked. The aerodynamic interference between adjacent turbines, including wake effect, was not considered in this study to more clearly demonstrate only the dynamic coupling. The analysis shows that some damage-induced excitations from one turbine in MUFOWT may induce appreciable changes in the performance of other turbines or the floating platform.

Y.H. Bae; M.H. Kim

2014-01-01T23:59:59.000Z

463

New England Wind Forum: Historic Wind Development in New England  

Wind Powering America (EERE)

First Large Scale Windmill First Large Scale Windmill 1970s OPEC Oil Embargo Sparks Renewed Interest Age of PURPA Spawns the Wind Farm An Industry in Transition More New England Wind Farms Modern Wind Turbines History Wrap Up State Activities Projects in New England Building Wind Energy in New England Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share Historic Wind Development in New England Wind has been an important energy source for centuries. In the United States, mechanical windmills provided as much as 25% of all non-transportation energy by the end of the 1800s. New England has relied on the wind from its early days, from powering seafaring commerce to grinding grain in the windmills of Cape Cod, several of which still stand. Some 6 million windmills across the nation were used for small-scale generation of electricity from the 1920s until the 1950s, when the U.S. government's rural electrification programs successfully reached remote areas. By the early 1970s, the number of windmills operating in the U.S. had dwindled to 150,000 - used mostly for watering livestock in remote areas of the western United States - although their widespread use continued elsewhere in the world.

464

May, 2010DC/DC CONVERTER FOR A SMALL SCALE WIND HYDROGEN SYSTEM  

E-Print Network (OSTI)

An electronic converter is designed for an isolated renewable energy system. In this system, energy produced by a small wind turbine is used to extract hydrogen from water. Unique aspects of this application that affect the performance of the converter will be defined. Design considerations of the individual components will be discussed. Calculations on performance and validation of those calculations are also presented.

Joel M. Jacobs; Joel M. Jacobs; Joel Michael Jacobs; Adviser Jerry; L. Hudgins

465

WINDExchange: Wind Energy Ordinances  

Wind Powering America (EERE)

Wind Energy Ordinances Federal, state, and local regulations govern many aspects of wind energy development. The exact nature of the project and its location will largely drive the...

466

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

SciTech Connect

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

467

Progress in the dual simplex method for large scale LP problems: practical dual phase 1 algorithms  

Science Journals Connector (OSTI)

The dual simplex algorithm has become a strong contender in solving large scale LP problems. One key problem of any dual simplex algorithm is to obtain a dual feasible basis as a starting point. We give an overview of methods which have been proposed ... Keywords: Dual simplex algorithm, Linear programming, Mathematical optimization system (MOPS)

Achim Koberstein; Uwe H. Suhl

2007-05-01T23:59:59.000Z

468

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

469

Large-scale Simulation of the Two-dimensional Kinetic Ising Model  

E-Print Network (OSTI)

Large-scale Simulation of the Two-dimensional Kinetic Ising Model Andreas Linke, Dieter W. Heermann-dimensional kinetic Ising model using a lattice of size 106 106 spins. We used Glauber as well as Metropolis dynamics for the Ising model because of its simplicity and its model character as a representant for a universality class

Heermann, Dieter W.

470

Large-scale content-based audio retrieval from text queries  

Science Journals Connector (OSTI)

In content-based audio retrieval, the goal is to find sound recordings (audio documents) based on their acoustic features. This content-based approach differs from retrieval approaches that index media files using metadata such as file names and user ... Keywords: content-based audio retrieval, discriminative learning, large scale, ranking

Gal Chechik; Eugene Ie; Martin Rehn; Samy Bengio; Dick Lyon

2008-10-01T23:59:59.000Z

471

Development and Large Scale Benchmark Testing of the PROSPECTOR_3 Threading Algorithm  

E-Print Network (OSTI)

Development and Large Scale Benchmark Testing of the PROSPECTOR_3 Threading Algorithm Jeffrey threading algorithm, which combines various scoring functions designed to match structurally re- lated fragments with RMSD of 2.5 ? were predicted. Combining easy and medium sets, 63% (91%) of the targets had

Kihara, Daisuke

472

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

473

Generative models of rich clubs in Hebbian neuronal networks and large-scale human brain networks  

Science Journals Connector (OSTI)

...Theme Issue Complex network theory and the brain compiled and edited by David Papo, Javier...neuronal networks and large-scale human brain networks Petra E. Vertes 1 Aaron Alexander-Bloch...Theme Issue Complex network theory and the brain . Rich clubs arise when nodes that are...

2014-01-01T23:59:59.000Z

474

Optimizing Large Scale Chemical Transport Models for Multicore Platforms John C. Linford and Adrian Sandu  

E-Print Network (OSTI)

Optimizing Large Scale Chemical Transport Models for Multicore Platforms John C. Linford and Adrian: Chemical Transport Model, Domain Decom- position, Time Splitting, Multicore, Scalability, IBM Cell Broadband Engine, Intel Quad-Core Xeon. Abstract The performance of a typical chemical transport model

Sandu, Adrian

475

Large-scale observations of a subauroral polarization stream by midlatitude SuperDARN radars: Instantaneous  

E-Print Network (OSTI)

: Instantaneous longitudinal velocity variations L. B. N. Clausen,1,2 J. B. H. Baker,1 J. M. Ruohoniemi,1 R. A. Greenwald,1 E. G. Thomas,1 S. G. Shepherd,3 E. R. Talaat,4 W. A. Bristow,5 Y. Zheng,6 A. J. Coster,7 and S ionospheric conductivities. Citation: Clausen, L. B. N., et al. (2012), Large-scale observations

Shepherd, Simon

476

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

477

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

478

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

479

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

480

Critical Perspectives on Large-Scale Distributed Applications and Production Grids  

E-Print Network (OSTI)

that utilize production Grid infrastructure. Along the way, we aim to provide an appreciation for the fact that developing distributed applications and the theory and practise of production Grid infrastructure have oftenCritical Perspectives on Large-Scale Distributed Applications and Production Grids Shantenu Jha1

Weissman, Jon

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


481

On the Connectivity Analysis over Large-Scale Hybrid Wireless Networks  

E-Print Network (OSTI)

are hybrid networks which include infrastructure nodes in multi-hop wireless networks, such as sinks nodes. hybrid networks which include infrastructure nodes in multi- hop wireless networks, such as sinksOn the Connectivity Analysis over Large-Scale Hybrid Wireless Networks Chi Yi and Wenye Wang

Wang, Wenye

482

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.

483

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

484

Design Considerations for a Large-Scale Wireless Sensor Network for Substation Monitoring  

E-Print Network (OSTI)

Design Considerations for a Large-Scale Wireless Sensor Network for Substation Monitoring Asis University City Blvd. Charlotte, NC 28223 Luke Van der Zel and Bienvenido Rodriguez Substations Group EPRI-Transmissions & Substations 9625 Research Drive Charlotte, NC 28262 Ralph McKosky Technology Innovation, Environment

Nasipuri, Asis

485

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.

486

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

487

ORIGINAL PAPER Large-scale dynamics of a heterogeneous forest resource  

E-Print Network (OSTI)

, conifer-dominated and broadleaf-conifer mixed stands) and stand structure (here high forest, coppiceORIGINAL PAPER Large-scale dynamics of a heterogeneous forest resource are driven jointly /Published online: 22 March 2012 # INRA / Springer-Verlag France 2012 Abstract & Context Forest resource

Paris-Sud XI, Université de

488

Title of Document: VARIABILITY OF THE GREAT PLAINS LOW-LEVEL JET: LARGE SCALE  

E-Print Network (OSTI)

ABSTRACT Title of Document: VARIABILITY OF THE GREAT PLAINS LOW-LEVEL JET: LARGE SCALE CIRCULATION Nigam, Department of Atmospheric and Oceanic Science Variability of the Great Plains Low-Level Jet Plains precipitation variability, and together, account for ~75% of the variance. Ocean basin centered

Maryland at College Park, University of

489

Validation of a large-scale wireless structural monitoring system on the Geumdang Bridge  

E-Print Network (OSTI)

Validation of a large-scale wireless structural monitoring system on the Geumdang Bridge Jerome Peter Lynch University of Michigan, Ann Arbor, MI, USA Yang Wang, Kincho H. Law Stanford University 14 wireless sensors is installed in the Geumdang Bridge, South Korea. In parallel to the wireless

Stanford University

490

The WiggleZ Dark Energy Survey: the transition to large-scale cosmic homogeneity  

Science Journals Connector (OSTI)

......research-article Articles The WiggleZ Dark Energy Survey: the transition to large-scale...this work, we use the WiggleZ Dark Energy Survey (Drinkwater et al. ) to make...THE WiggleZ SURVEY The WiggleZ Dark Energy Survey (Drinkwater et al. ) is a......

Morag I. Scrimgeour; Tamara Davis; Chris Blake; J. Berian James; Gregory B. Poole; Lister Staveley-Smith; Sarah Brough; Matthew Colless; Carlos Contreras; Warrick Couch; Scott Croom; Darren Croton; Michael J. Drinkwater; Karl Forster; David Gilbank; Mike Gladders; Karl Glazebrook; Ben Jelliffe; Russell J. Jurek; I-hui Li; Barry Madore; D. Christopher Martin; Kevin Pimbblet; Michael Pracy; Rob Sharp; Emily Wisnioski; David Woods; Ted K. Wyder; H. K. C. Yee

2012-09-01T23:59:59.000Z

491

A Parallel Rolling Horizon Scheme for Large Scale Security Constrained Unit Commitment Problems  

E-Print Network (OSTI)

grid [1]. To maintain the security of the electric grid, a variety of security constrained, for exampleA Parallel Rolling Horizon Scheme for Large Scale Security Constrained Unit Commitment Problems and security constraints. In this paper, we improve the traditional Lagrange Relaxation (LR) approach

Feinberg, Eugene A.

492

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

493

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

494

Seismic Modelling of the Earth's Large-Scale Three-Dimensional Structure  

Science Journals Connector (OSTI)

4 July 1989 research-article Seismic Modelling of the Earth's Large-Scale...article we describe several methods of seismic inversion and intercompare the resulting...is that the magnitude of the observed seismic anomalies is of the order expected in...

1989-01-01T23:59:59.000Z

495

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.

496

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

497

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

498

Environmental Effects and Its Assessment for Shale Gas Large-Scale Development of China  

Science Journals Connector (OSTI)

Shale gas is a new kind of unconventional gas and can be used with a environmental acceptable way with high energy efficiency. The large-scale development of shale gas in china will contribute to energy structure referring both in supply and demand as ...

Jian Wang, Zihan Liu, Shubin Wang

2014-07-01T23:59:59.000Z

499

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.

500

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