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


1

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

Why offshore wind energy? Offshore wind turbines have theturbine will also uncover potential problems that exist with offshore wind energy.

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

2

Offshore Wind Turbines: Some Technical Challenges  

E-Print Network [OSTI]

1 Offshore Wind Turbines: Some Technical Challenges Prof. Guy Houlsby FREng Oxford University House engineers concerned with installation of offshore wind turbines. The author is Professor of Civil of foundations for offshore structures. He also has a strong interest in the development of the fundamental

Houlsby, Guy T.

3

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

Enabling New Markets for Offshore Wind Energy." Proc. ofand Laura Parsons. Offshore Wind Energy. Washingto, DC:Challenges for Floating Offshore Wind Turbines. Tech. no.

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

4

Structural reliability of offshore wind turbines.  

E-Print Network [OSTI]

??Statistical extrapolation is required to predict extreme loads, associated with a target return period, for offshore wind turbines. In statistical extrapolation, “short-term" distributions of the… (more)

Agarwal, Puneet, 1977-

2012-01-01T23:59:59.000Z

5

Offshore Wind Turbines Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine Addendum 2  

SciTech Connect (OSTI)

Additional modeling for offshore wind turbines, for proposed floating wind platforms to be deployed by University of Maine/DeepCwind.

Aker, Pamela M.; Jones, Anthony M.; Copping, Andrea E.

2011-03-01T23:59:59.000Z

6

Loads Analysis of Several Offshore Floating Wind Turbine Concepts  

SciTech Connect (OSTI)

This paper presents a comprehensive dynamic-response analysis of six offshore floating wind turbine concepts.

Robertson, A. N.; Jonkman, J. M.

2011-10-01T23:59:59.000Z

7

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

Offshore wind turbines have the potential to generateuncover potential problems that exist with offshore windwind turbines in operation, this technology has the potential

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

8

Quantifying the hurricane risk to offshore wind turbines  

E-Print Network [OSTI]

Quantifying the hurricane risk to offshore wind turbines Stephen Rosea , Paulina Jaramilloa,1. Turbine tower buckling has been observed in typhoons, but no offshore wind turbines have yet been built be destroyed by hurricanes in an offshore wind farm. We apply this model to estimate the risk to offshore wind

Jaramillo, Paulina

9

SUBSPACE-BASED DETECTION OF FATIGUE DAMAGE ON JACKET SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES  

E-Print Network [OSTI]

SUBSPACE-BASED DETECTION OF FATIGUE DAMAGE ON JACKET SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES damage in real size structural components of offshore wind turbines. KEYWORDS : Damage detection, Offshore wind turbines, Numerical response simulation. INTRODUCTION Offshore wind turbines are exposed

Paris-Sud XI, Université de

10

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

1985. 23. Hau, E. Wind Turbines: Fundamentals, Technologies,for Floating Offshore Wind Turbines. Tech. no. NREL/CP-500-Full-scale Floating Wind Turbine." Statoil, 14 Oct. 2009.

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

11

Offshore Series Wind Turbine Variable Hub heights & rotor diameters  

E-Print Network [OSTI]

3.6MW Offshore Series Wind Turbine GE Energy #12;Feature Variable Hub heights & rotor diameters-savings feature, considering the rigors of offshore power generation. The 3.6 MW offshore wind turbine also, for both on and offshore use. Special features include... As the world's first commercially available wind

Firestone, Jeremy

12

Extreme Loads for an Offshore Wind Turbine using Statistical  

E-Print Network [OSTI]

Extreme Loads for an Offshore Wind Turbine using Statistical Extrapolation from Limited Field Data,itiscommontoeithercarry out extensive simulation studies or undertake a field measurement campaign. At the Blyth offshore wind here is to estimate extreme loads for an offshore wind turbine for which the environmental and load

Manuel, Lance

13

Wave Models for Offshore Wind Turbines Puneet Agarwal  

E-Print Network [OSTI]

Wave Models for Offshore Wind Turbines Puneet Agarwal§ and Lance Manuely Department of Civil for estimating loads on the support structure (monopile) of an offshore wind turbine. We use a 5MW utility-scale wind turbine model for the simulations. Using, first, the sim- pler linear irregular wave modeling

Manuel, Lance

14

Taming Hurricanes With Arrays of Offshore Wind Turbines  

E-Print Network [OSTI]

Taming Hurricanes With Arrays of Offshore Wind Turbines Mark Z. Jacobson Cristina Archer, Willet #12;Representation of a vertically-resolved wind turbine in model Lines are model layers) or 50 m/s (destruction) speed. Can Walls of Offshore Wind Turbines Dissipate Hurricanes? #12;Katrina

Firestone, Jeremy

15

Offshore Wind Turbine Transportation & Installation Analyses Planning Optimal Marine Operations for Offshore Wind Projects.  

E-Print Network [OSTI]

?? Transportation and installation of offshore wind turbines (Tower, Nacelle and Rotor) is a complete process conducted over several phases, usually in sequence. There are… (more)

Uraz, Emre

2011-01-01T23:59:59.000Z

16

Multi-hazard Reliability Assessment of Offshore Wind Turbines  

E-Print Network [OSTI]

A probabilistic framework is developed to assess the structural reliability of offshore wind turbines. Probabilistic models are developed to predict the deformation, shear force and bending moment demands on the support structure of wind turbines...

Mardfekri Rastehkenari, Maryam 1981-

2012-12-04T23:59:59.000Z

17

Assessing Novel Foundation Options for Offshore Wind Turbines  

E-Print Network [OSTI]

Assessing Novel Foundation Options for Offshore Wind Turbines B.W. Byrne, BE(Hons), BCom, MA, DPhil G.T. Houlsby, MA, DSc, FREng, FICE Oxford University, UK SYNOPSIS Offshore wind farms of these being the foundations for the offshore turbines. We review here the results of a recent research

Byrne, Byron

18

Scour around an offshore wind turbine W.F. Louwersheimer  

E-Print Network [OSTI]

Scour around an offshore wind turbine MSc Thesis W.F. Louwersheimer January, 2007 Delft University of Technology Ballast Nedam Faculty of Civil Engineering Egmond Offshore Energy Section of Hydraulic Engineering #12;Scour around an offshore wind turbine Delft University of Technology Ballast Nedam - Egmond

Langendoen, Koen

19

RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT)  

E-Print Network [OSTI]

RELIABILITY COMPARISON MODELS FOR OFFSHORE WIND TURBINES (OWT) Yizhou Lu, T. M. Delorm, A. Christou of the reliability of these 5 Types Surrogate failure rate data Onshore wind turbines (OT) 1-1.5MW CONCLUSIONS., Faulstich, S. & van Bussel G. J. W. Reliability & availability of wind turbine electrical & electronic

Bernstein, Joseph B.

20

NREL Software Aids Offshore Wind Turbine Designs (Fact Sheet)  

SciTech Connect (OSTI)

NREL researchers are supporting offshore wind power development with computer models that allow detailed analyses of both fixed and floating offshore wind turbines. While existing computer-aided engineering (CAE) models can simulate the conditions and stresses that a land-based wind turbine experiences over its lifetime, offshore turbines require the additional considerations of variations in water depth, soil type, and wind and wave severity, which also necessitate the use of a variety of support-structure types. NREL's core wind CAE tool, FAST, models the additional effects of incident waves, sea currents, and the foundation dynamics of the support structures.

Not Available

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

United States Launches First Grid-Connected Offshore Wind Turbine...  

Energy Savers [EERE]

partners conducted extensive design, engineering, and testing of floating offshore wind turbines, then constructed and deployed its 65-foot-tall VolturnUS prototype. At a scale of...

22

Aeroelastic Instabilities of Large Offshore and Onshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

This paper examines the aeroelastic stability of a 5-MW conceptual wind turbine mounted on a floating barge and presents results for onshore and offshore configurations for various conditions.

Bir, G.; Jonkman, J.

2007-08-01T23:59:59.000Z

23

Coupled Dynamic Analysis of Multiple Unit Floating Offshore Wind Turbine  

E-Print Network [OSTI]

In the present study, a numerical simulation tool has been developed for the rotor-floater-tether coupled dynamic analysis of Multiple Unit Floating Offshore Wind Turbine (MUFOWT) in the time domain including aero-blade-tower dynamics and control...

Bae, Yoon Hyeok

2013-04-23T23:59:59.000Z

24

"Design of Offshore Wind Turbines for Hurricane Resilience" Graduate Seminar  

E-Print Network [OSTI]

"Design of Offshore Wind Turbines for Hurricane Resilience" Graduate Seminar Thursday, December 5 Extremes: The Science, Impacts, and Policy Relevance" Graduate Seminar Thursday, March 28, 2013, 12pm ­ 1pm

Connor, Ed

25

Engineering Challenges for Floating Offshore Wind Turbines  

SciTech Connect (OSTI)

The major objective of this paper is to survey the technical challenges that must be overcome to develop deepwater offshore wind energy technologies and to provide a framework from which the first-order economics can be assessed.

Butterfield, S.; Musial, W.; Jonkman, J.; Sclavounos, P.

2007-09-01T23:59:59.000Z

26

NREL: Wind Research - Offshore Wind Turbine Research  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas Conchas recoveryLaboratory | NationalJohn F. Geisz,Aerial photoInterconnectionTheOffshore

27

LiDAR observations of offshore winds at future wind turbine operating heights  

E-Print Network [OSTI]

LiDAR observations of offshore winds at future wind turbine operating heights Alfredo Peña1 , Sven at the Horns Rev offshore wind farm. The influence of atmospheric stability on the surface layer wind shear: Charnock, LiDAR, Marine boundary layer, Offshore, Surface layer, Wind profile. 1 Introduction There is

28

St h ti d i l i fStochastic dynamic analysis of offshore wind turbines  

E-Print Network [OSTI]

1 St h ti d i l i fStochastic dynamic analysis of offshore wind turbines ­ with emphasis on fatigue analysis of offshore bottom-fixed wind turbines · Modelling and dynamic analysis of floating wind turbines ­ Stochastic dynamic analysis of offshore wind turbines; mooring system for wave energy converters · 2010 8

Nørvåg, Kjetil

29

Modelling of offshore wind turbine wakes with the wind farm program FLaP  

E-Print Network [OSTI]

Modelling of offshore wind turbine wakes with the wind farm program FLaP Bernhard Lange(1) , Hans been extended to improve the description of wake development in offshore conditions, especially the low from the Danish offshore wind farm Vindeby. Vertical wake profiles and mean turbulence intensities

Heinemann, Detlev

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

Offshore Wind Turbine Design: Addressing Uncertainty Drivers Sten Frandsen Niels Jacob Tarp-Johansen  

E-Print Network [OSTI]

Offshore Wind Turbine Design: Addressing Uncertainty Drivers Sten Frandsen Niels Jacob Tarp@civil.auc.dk leje@elsam-eng.com Abstract: Current offshore wind turbine design methods have matured to a 1st identification of the most important uncertainty drivers specific for offshore wind turbine design loads

32

Incorporating Irregular Nonlinear Waves in Coupled Simulation of Offshore Wind Turbines  

E-Print Network [OSTI]

Incorporating Irregular Nonlinear Waves in Coupled Simulation of Offshore Wind Turbines Puneet, and Environmental Engineering The University of Texas, Austin, TX 78712 Design of an offshore wind turbine requires on the support structure (monopile) of an offshore wind turbine. We present the theory for the irregular

Manuel, Lance

33

DATA NORMALIZATION FOR FOUNDATION SHM OF AN OFFSHORE WIND TURBINE : A REAL-LIFE CASE STUDY  

E-Print Network [OSTI]

DATA NORMALIZATION FOR FOUNDATION SHM OF AN OFFSHORE WIND TURBINE : A REAL-LIFE CASE STUDY Wout the first results in the development of a SHM approach for the foun- dations of an offshore wind turbine the performance of the presented approach. KEYWORDS : Foundation Monitoring, Offshore Wind Turbine, Operational

Paris-Sud XI, Université de

34

CONTINUOUS FATIGUE ASSESSMENT OF AN OFFSHORE WIND TURBINE USING A LIMITED NUMBER OF VIBRATION SENSORS  

E-Print Network [OSTI]

CONTINUOUS FATIGUE ASSESSMENT OF AN OFFSHORE WIND TURBINE USING A LIMITED NUMBER OF VIBRATION, Modal decomposition and expansion, Finite Element Model INTRODUCTION Offshore wind turbines are exposed locations along the structure. This is not the case though in monopile offshore wind turbines, where fatigue

Boyer, Edmond

35

Time-domain Fatigue Response and Reliability Analysis of Offshore Wind Turbines with  

E-Print Network [OSTI]

Time-domain Fatigue Response and Reliability Analysis of Offshore Wind Turbines with Emphasis of offshore wind turbines Defense: 09.12.2012 2012 - : Structural Engineer in Det Norske Veritas (DNV) 2007 of the drive train of an on-land wind turbine under dynamic wind loads. The main tasks of this study are to

Nørvåg, Kjetil

36

1 Copyright 2007 by ASME SIMULATION OF OFFSHORE WIND TURBINE RESPONSE FOR  

E-Print Network [OSTI]

1 Copyright © 2007 by ASME SIMULATION OF OFFSHORE WIND TURBINE RESPONSE FOR EXTREME LIMIT STATES P loads for an offshore wind turbine using simulation, statistical extrapolation is the method of choice based on stochastic response simulations of a 5 MW offshore turbine. We illustrate the use of the peak

Manuel, Lance

37

A REAL OPTIONS OPTIMIZATION MODEL TO MEET AVAILABILITY REQUIREMENTS FOR OFFSHORE WIND TURBINES  

E-Print Network [OSTI]

1 A REAL OPTIONS OPTIMIZATION MODEL TO MEET AVAILABILITY REQUIREMENTS FOR OFFSHORE WIND TURBINES on Real Options (RO) and stochastic dynamic programming for the availability maximization of an offshore wind farm with prognostic capabilities. Alternative energy sources such as offshore wind turbines

Sandborn, Peter

38

Comparison of Wake Model Simulations with Offshore Wind Turbine Wake Profiles Measured by Sodar  

E-Print Network [OSTI]

a ship-mounted sodar at a small offshore wind farm. The experiments were conducted at varying distances Offshore wind farms have increased in size from the first phase of installation with up to 20 turbinesComparison of Wake Model Simulations with Offshore Wind Turbine Wake Profiles Measured by Sodar R

Pryor, Sara C.

39

Mooring Line Modelling and Design Optimization of Floating Offshore Wind Turbines  

E-Print Network [OSTI]

Mooring Line Modelling and Design Optimization of Floating Offshore Wind Turbines by Matthew Thomas Mooring Line Modelling and Design Optimization of Floating Offshore Wind Turbines by Matthew Thomas Jair was coupled to the floating wind turbine simulator FAST. The results of the comparison study indicate the need

Victoria, University of

40

ENERGY FOR SUSTAINABILITY: HIGHLY COMPLIANT FLOATING OFFSHORE WIND TURBINES: FEASIBILITY ASSESSMENT THROUGH THEORY, SIMULATION AND DESIGN  

E-Print Network [OSTI]

A-1 ENERGY FOR SUSTAINABILITY: HIGHLY COMPLIANT FLOATING OFFSHORE WIND TURBINES: FEASIBILITY ASSESSMENT THROUGH THEORY, SIMULATION AND DESIGN Hundreds of wind turbines have been installed in the oceans surrounding Europe, and plans are in place for offshore developments in the US. Locating these wind turbines

Sweetman, Bert

Note: This page contains sample records for the topic "offshore wind turbines" 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

Simulation of electricity supply of an Atlantic island by offshore wind turbines and wave  

E-Print Network [OSTI]

Simulation of electricity supply of an Atlantic island by offshore wind turbines and wave energy community. Key words: Wave energy, offshore wind turbines, marine energy 1 Introduction Marine renewables installations of a few kW like small wind turbines or photovoltaic cells installed to provide electricity

Paris-Sud XI, Université de

42

RECYCLING AND REMOVAL OF OFFSHORE WIND TURBINES AN INTERACTIVE METHOD FOR REDUCTION OF NEGATIVE ENVIRONMENTAL EFFECTS  

E-Print Network [OSTI]

RECYCLING AND REMOVAL OF OFFSHORE WIND TURBINES ­ AN INTERACTIVE METHOD FOR REDUCTION OF NEGATIVE.borup@risoe.dk ABSTRACT: This paper describes a method for reduction of negative environmental impacts of wind turbines and an analysis of future removal and recycling processes of offshore wind turbines. The method is process

43

Method for computing efficient electrical indicators for offshore wind turbine monitoring  

E-Print Network [OSTI]

Method for computing efficient electrical indicators for offshore wind turbine monitoring Georgia.cablea, pierre.granjon, christophe.berenguer} @gipsa-lab.grenoble-inp.fr Abstract Offshore wind turbines contributed to the decrease of the availability of the wind turbines, compared to the onshore ones. In order

Paris-Sud XI, Université de

44

www.cesos.ntnu.no Author Centre for Ships and Ocean Structures Offshore Wind Turbine Operation  

E-Print Network [OSTI]

1 www.cesos.ntnu.no Author ­ Centre for Ships and Ocean Structures Offshore Wind Turbine Operation Structures Outline · Introduction · Wind Turbine Operational Conditions · Wind Turbine Operation under Atmospheric Icing · Wind Turbine Operation under Fault Condition · Conclusions www.cesos.ntnu.no M. Etemaddar

Nørvåg, Kjetil

45

American Institute of Aeronautics and Astronautics Foundation Models for Offshore Wind Turbines  

E-Print Network [OSTI]

American Institute of Aeronautics and Astronautics 1 Foundation Models for Offshore Wind Turbines of alternative models for monopile pile foundations for shallow-water offshore wind turbines has on extreme loads associated with long return periods that are needed during design. We employ a utility-scale 5MW offshore

Manuel, Lance

46

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network [OSTI]

wind turbine. Rating Control Rotor Radius Rated Wind Speed Towerwind turbine is used in this design, however there are slight modifications of the tower.of the tower. Figure 2.3: NREL 5 MW Reference Wind Turbine [

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

47

On Assessing the Accuracy of Offshore Wind Turbine Reliability-Based Design Loads from the Environmental Contour Method  

E-Print Network [OSTI]

On Assessing the Accuracy of Offshore Wind Turbine Reliability-Based Design Loads from to derive design loads for an active stall-regulated offshore wind turbine. Two different Danish offshore contour method; wind turbine; offshore; reliability. INTRODUCTION Inverse reliability techniques

Manuel, Lance

48

Edge scour around an offshore wind turbine:.  

E-Print Network [OSTI]

??Wind energy has experienced an enormous growth in the last years and is becoming more and more popular as an alternative for conventional power. Large… (more)

Simoons, E.

2012-01-01T23:59:59.000Z

49

Simulating Turbulent Wind Fields for Offshore Turbines in Hurricane-Prone Regions (Poster)  

SciTech Connect (OSTI)

Extreme wind load cases are one of the most important external conditions in the design of offshore wind turbines in hurricane prone regions. Furthermore, in these areas, the increase in load with storm return-period is higher than in extra-tropical regions. However, current standards have limited information on the appropriate models to simulate wind loads from hurricanes. This study investigates turbulent wind models for load analysis of offshore wind turbines subjected to hurricane conditions. Suggested extreme wind models in IEC 61400-3 and API/ABS (a widely-used standard in oil and gas industry) are investigated. The present study further examines the wind turbine response subjected to Hurricane wind loads. Three-dimensional wind simulator, TurbSim, is modified to include the API wind model. Wind fields simulated using IEC and API wind models are used for an offshore wind turbine model established in FAST to calculate turbine loads and response.

Guo, Y.; Damiani, R.; Musial, W.

2014-04-01T23:59:59.000Z

50

Paper No. 2006-JSC-397 Agarwal Design Loads for an Offshore Wind Turbine using Statistical Extrapolation from Limited Field Data  

E-Print Network [OSTI]

Paper No. 2006-JSC-397 Agarwal Design Loads for an Offshore Wind Turbine using Statistical a field measurement campaign. At the Blyth offshore wind farm in the United Kingdom, a 2MW wind turbine of variability in the parameters for load distribution is investigated. KEY WORDS: Offshore wind turbines

Manuel, Lance

51

Environmental Impacts Due to Fixed and Floating Offshore Wind Turbines.  

E-Print Network [OSTI]

??As has been the case for onshore wind systems, the environmental effects of offshore wind farms are expected to play an important part of the… (more)

Brewer, Micah K

2012-01-01T23:59:59.000Z

52

First U.S. Grid-Connected Offshore Wind Turbine Installed Off...  

Office of Environmental Management (EM)

deepwater offshore floating wind turbine near Bangor. When the turbine was turned on and electricity began flowing through an undersea cable to Central Maine Power on June 13, the...

53

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

E-Print Network [OSTI]

-angle rigid body rotations of a floating wind turbine in the time domain. The tower and rotor-nacelle assemblyFloating Offshore Wind Turbine Dynamics: Large-Angle Motions in Euler-Space Bert Sweetman Texas A wind turbines in deep water, where environmental forcing could subject the rotor to meaningful angular

Sweetman, Bert

54

Design Considerations for Monopile Founded Offshore Wind Turbines Subject to Breaking Waves  

E-Print Network [OSTI]

DESIGN CONSIDERATIONS FOR MONOPILE FOUNDED OFFSHORE WIND TURBINES SUBJECT TO BREAKING WAVES A Thesis by GARRETT REESE OWENS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... Farms ...... 4 Figure 2 Overview of Offshore Wind Turbine Terminology................................. 7 Figure 3 Overturning Moment as a Function of Water Depth ............................... 10 Figure 4 Types of Breaking Waves...

Owens, Garrett Reese 1987-

2012-11-26T23:59:59.000Z

55

Loading and Response of Offshore Wind Turbine Support Structures: Prediction with Comparison to Measured Data  

E-Print Network [OSTI]

Loading and Response of Offshore Wind Turbine Support Structures: Prediction with Comparison, offshore wind support platforms differ from oil platforms is several important ways: First, wind platforms is often closer to frequencies at which there is meaningful wave energy. Second, wind farms often include

Sweetman, Bert

56

Influence of Nonlinear Irregular Waves on the Fatigue Loads of an Offshore Wind Turbine  

E-Print Network [OSTI]

Influence of Nonlinear Irregular Waves on the Fatigue Loads of an Offshore Wind Turbine Michiel B. van der Meulen1, Turaj Ashuri2, Gerard J.W. van Bussel3 and David P. Molenaar1 1 Offshore Center-mail: michiel van.der.meulen@siemens.com Abstract. In order to make offshore wind power a cost effective

Papalambros, Panos

57

Wind/Wave Misalignment in the Loads Analysis of a Floating Offshore Wind Turbine: Preprint  

SciTech Connect (OSTI)

Wind resources far from the shore and in deeper seas have encouraged the offshore wind industry to look into floating platforms. The International Electrotechnical Commission (IEC) is developing a new technical specification for the design of floating offshore wind turbines that extends existing design standards for land-based and fixed-bottom offshore wind turbines. The work summarized in this paper supports the development of best practices and simulation requirements in the loads analysis of floating offshore wind turbines by examining the impact of wind/wave misalignment on the system loads under normal operation. Simulations of the OC3-Hywind floating offshore wind turbine system under a wide range of wind speeds, significant wave heights, peak-spectral periods and wind/wave misalignments have been carried out with the aero-servo-hydro-elastic tool FAST [4]. The extreme and fatigue loads have been calculated for all the simulations. The extreme and fatigue loading as a function of wind/wave misalignment have been represented as load roses and a directional binning sensitivity study has been carried out. This study focused on identifying the number and type of wind/wave misalignment simulations needed to accurately capture the extreme and fatigue loads of the system in all possible metocean conditions considered, and for a down-selected set identified as the generic US East Coast site. For this axisymmetric platform, perpendicular wind and waves play an important role in the support structure and including these cases in the design loads analysis can improve the estimation of extreme and fatigue loads. However, most structural locations see their highest extreme and fatigue loads with aligned wind and waves. These results are specific to the spar type platform, but it is expected that the results presented here will be similar to other floating platforms.

Barj, L.; Stewart, S.; Stewart, G.; Lackner, M.; Jonkman, J.; Robertson, A.

2014-02-01T23:59:59.000Z

58

Definition of a 5-MW Reference Wind Turbine for Offshore System Development  

SciTech Connect (OSTI)

This report describes a three-bladed, upwind, variable-speed, variable blade-pitch-to-feather-controlled multimegawatt wind turbine model developed by NREL to support concept studies aimed at assessing offshore wind technology.

Jonkman, J.; Butterfield, S.; Musial, W.; Scott, G.

2009-02-01T23:59:59.000Z

59

Abstract--The offshore wind farm with installed back-to-back power converter in wind turbines is studied. As an  

E-Print Network [OSTI]

Abstract--The offshore wind farm with installed back-to- back power converter in wind turbines is studied. As an example the Burbo Bank offshore wind farm with Siemens Wind Power wind turbines is taken installed in wind turbines are presented. Harmonic load flow analysis and impedance frequency

Bak, Claus Leth

60

OC3 -- Benchmark Exercise of Aero-Elastic Offshore Wind Turbine Codes: Preprint  

SciTech Connect (OSTI)

This paper introduces the work content and status of the first international investigation and verification of aero-elastic codes for offshore wind turbines as performed by the "Offshore Code Comparison Collaboration" (OC3) within the "IEA Wind Annex XXIII -- Subtask 2".

Passon, P.; Kuhn, M.; Butterfield, S.; Jonkman, J.; Camp, T.; Larsen, T. J.

2007-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Assessing Fatigue and Ultimate Load Uncertainty in Floating Offshore Wind Turbines Due to Varying Simulation Length  

SciTech Connect (OSTI)

With the push towards siting wind turbines farther offshore due to higher wind quality and less visibility, floating offshore wind turbines, which can be located in deep water, are becoming an economically attractive option. The International Electrotechnical Commission's (IEC) 61400-3 design standard covers fixed-bottom offshore wind turbines, but there are a number of new research questions that need to be answered to modify these standards so that they are applicable to floating wind turbines. One issue is the appropriate simulation length needed for floating turbines. This paper will discuss the results from a study assessing the impact of simulation length on the ultimate and fatigue loads of the structure, and will address uncertainties associated with changing the simulation length for the analyzed floating platform. Recommendations of required simulation length based on load uncertainty will be made and compared to current simulation length requirements.

Stewart, G.; Lackner, M.; Haid, L.; Matha, D.; Jonkman, J.; Robertson, A.

2013-07-01T23:59:59.000Z

62

Multibody Dynamics Using Conservation of Momentum with Application to Compliant Offshore Floating Wind Turbines  

E-Print Network [OSTI]

Environmental, aesthetic and political pressures continue to push for siting off-shore wind turbines beyond sight of land, where waters tend to be deeper, and use of floating structures is likely to be considered. Savings could potentially...

Wang, Lei

2012-10-19T23:59:59.000Z

63

A nonlinear wave load model for extreme and fatigue responses of offshore floating wind turbines  

E-Print Network [OSTI]

Ocean energy is one of the most important sources of alternative energy and offshore floating wind turbines are considered viable and economical means of harnessing ocean energy. The accurate prediction of nonlinear ...

Lee, Sungho, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

64

Challenges in Simulation of Aerodynamics, Hydrodynamics, and Mooring-Line Dynamics of Floating Offshore Wind Turbines  

SciTech Connect (OSTI)

This paper presents the current major modeling challenges for floating offshore wind turbine design tools and describes aerodynamic and hydrodynamic effects due to rotor and platform motions and usage of non-slender support structures.

Matha, D.; Schlipf, M.; Cordle, A.; Pereira, R.; Jonkman, J.

2011-10-01T23:59:59.000Z

65

Loads Analysis of a Floating Offshore Wind Turbine Using Fully Coupled Simulation: Preprint  

SciTech Connect (OSTI)

This paper presents the use of fully coupled aero-hydro-servo-elastic simulation tools to perform a loads analysis of a 5-MW offshore wind turbine supported by a barge with moorings, one of many promising floating platform concepts.

Jonkman, J. M.; Buhl, M. L., Jr.

2007-06-01T23:59:59.000Z

66

Comparison of API & IEC Standards for Offshore Wind Turbine Applications in the U.S. Atlantic Ocean: Phase II; March 9, 2009 - September 9, 2009  

SciTech Connect (OSTI)

This report compares two design guidelines for offshore wind turbines: Recommended Practice for Planning, Designing, and Constructing Fixed Offshore Platform Structures and the International Electrotechnical Commission 61400-3 Design Requirements for Offshore Wind Turbines.

Jha, A.; Dolan, D.; Gur, T.; Soyoz, S.; Alpdogan, C.

2013-01-01T23:59:59.000Z

67

Effect of Second-Order Hydrodynamics on Floating Offshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

Offshore winds are generally stronger and more consistent than winds on land, making the offshore environment attractive for wind energy development. A large part of the offshore wind resource is however located in deep water, where floating turbines are the only economical way of harvesting the energy. The design of offshore floating wind turbines relies on the use of modeling tools that can simulate the entire coupled system behavior. At present, most of these tools include only first-order hydrodynamic theory. However, observations of supposed second-order hydrodynamic responses in wave-tank tests performed by the DeepCwind consortium suggest that second-order effects might be critical. In this paper, the methodology used by the oil and gas industry has been modified to apply to the analysis of floating wind turbines, and is used to assess the effect of second-order hydrodynamics on floating offshore wind turbines. The method relies on combined use of the frequency-domain tool WAMIT and the time-domain tool FAST. The proposed assessment method has been applied to two different floating wind concepts, a spar and a tension-leg-platform (TLP), both supporting the NREL 5-MW baseline wind turbine. Results showing the hydrodynamic forces and motion response for these systems are presented and analysed, and compared to aerodynamic effects.

Roald, L.; Jonkman, J.; Robertson, A,; Chokani, N.

2013-07-01T23:59:59.000Z

68

Effects of Second-Order Hydrodynamic Forces on Floating Offshore Wind Turbines  

SciTech Connect (OSTI)

Relative to first-order, second-order wave-excitation loads are known to cause significant motions and additional loads in offshore oil and gas platforms. The design of floating offshore wind turbines was partially inherited from the offshore oil and gas industry. Floating offshore wind concepts have been studied with powerful aero-hydro-servo-elastic tools; however, most of the existing work on floating offshore wind turbines has neglected the contribution of second-order wave-excitation loads. As a result, this paper presents a computationally efficient methodology to consider these loads within FAST, a wind turbine computer-aided engineering tool developed by the National Renewable Energy Laboratory. The method implemented was verified against the commercial OrcaFlex tool, with good agreement, and low computational time. A reference floating offshore wind turbine was studied under several wind and wave load conditions, including the effects of second-order slow-drift and sum-frequency loads. Preliminary results revealed that these loads excite the turbine's natural frequencies, namely the surge and pitch natural frequencies.

Duarte, T.; Sarmento, A. J. N. A.; Jonkman, J.

2014-04-01T23:59:59.000Z

69

Grid Simulator for Testing a Wind Turbine on Offshore Floating Platform  

SciTech Connect (OSTI)

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

Gevorgian, V.

2012-02-01T23:59:59.000Z

70

Basic Integrative Models for Offshore Wind Turbine Systems  

E-Print Network [OSTI]

This research study developed basic dynamic models that can be used to accurately predict the response behavior of a near-shore wind turbine structure with monopile, suction caisson, or gravity-based foundation systems. The marine soil conditions...

Aljeeran, Fares

2012-07-16T23:59:59.000Z

71

Effect of Second-Order Hydrodynamics on a Floating Offshore Wind Turbine  

SciTech Connect (OSTI)

The design of offshore floating wind turbines uses design codes that can simulate the entire coupled system behavior. At the present, most codes include only first-order hydrodynamics, which induce forces and motions varying with the same frequency as the incident waves. Effects due to second- and higher-order hydrodynamics are often ignored in the offshore industry, because the forces induced typically are smaller than the first-order forces. In this report, first- and second-order hydrodynamic analysis used in the offshore oil and gas industry is applied to two different wind turbine concepts--a spar and a tension leg platform.

Roald, L.; Jonkman, J.; Robertson, A.

2014-05-01T23:59:59.000Z

72

Development of Fully Coupled Aeroelastic and Hydrodynamic Models for Offshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

Aeroelastic simulation tools are routinely used to design and analyze onshore wind turbines, in order to obtain cost effective machines that achieve favorable performance while maintaining structural integrity. These tools employ sophisticated models of wind-inflow; aerodynamic, gravitational, and inertial loading of the rotor, nacelle, and tower; elastic effects within and between components; and mechanical actuation and electrical responses of the generator and of control and protection systems. For offshore wind turbines, additional models of the hydrodynamic loading in regular and irregular seas, the dynamic coupling between the support platform motions and wind turbine motions, and the dynamic characterization of mooring systems for compliant floating platforms are also important. Hydrodynamic loading includes contributions from hydrostatics, wave radiation, and wave scattering, including free surface memory effects. The integration of all of these models into comprehensive simulation tools, capable of modeling the fully coupled aeroelastic and hydrodynamic responses of floating offshore wind turbines, is presented.

Jonkman, J. M.; Sclavounos, P. D.

2006-01-01T23:59:59.000Z

73

Offshore Wind Geoff Sharples  

E-Print Network [OSTI]

Offshore Wind Geoff Sharples geoff@clearpathenergyllc.com #12;Frequently Unanswered Ques?ons · Why don't "they" build more offshore wind? · Why not make the blades bigger? · How big will turbines get? #12;Offshore Resource is Good #12

Kammen, Daniel M.

74

Energy Department Announces Offshore Wind Demonstration Awardees...  

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

will help address key challenges associated with installing utility-scale offshore wind turbines, connecting offshore turbines to the power grid, and navigating new permitting and...

75

Houlsby, G. T., Kelly, R. B., Huxtable, J. & Byrne, B. W. (2006). Geotechnique 56, No. 1, 310 Field trials of suction caissons in sand for offshore wind turbine  

E-Print Network [OSTI]

Field trials of suction caissons in sand for offshore wind turbine foundations G. T. HOULSBY*, R. B to the design of either monopod or quadruped foundations for offshore wind turbines. Records are presented conception de fonda- tions de turbines e´oliennes. INTRODUCTION The offshore wind energy industry is a very

Byrne, Byron

76

Cost of Offshore Wind Energy Charlene Nalubega  

E-Print Network [OSTI]

Cost of Offshore Wind Energy and Industrial Engineering The focus of my research is to estimate the cost of floating offshore wind turbines water as well as on land based wind farms. The specific offshore wind energy case under consideration

Mountziaris, T. J.

77

Effects of Second-Order Hydrodynamics on a Semisubmersible Floating Offshore Wind Turbine: Preprint  

SciTech Connect (OSTI)

The objective of this paper is to assess the second-order hydrodynamic effects on a semisubmersible floating offshore wind turbine. Second-order hydrodynamics induce loads and motions at the sum- and difference-frequencies of the incident waves. These effects have often been ignored in offshore wind analysis, under the assumption that they are significantly smaller than first-order effects. The sum- and difference-frequency loads can, however, excite eigenfrequencies of the system, leading to large oscillations that strain the mooring system or vibrations that cause fatigue damage to the structure. Observations of supposed second-order responses in wave-tank tests performed by the DeepCwind consortium at the MARIN offshore basin suggest that these effects might be more important than originally expected. These observations inspired interest in investigating how second-order excitation affects floating offshore wind turbines and whether second-order hydrodynamics should be included in offshore wind simulation tools like FAST in the future. In this work, the effects of second-order hydrodynamics on a floating semisubmersible offshore wind turbine are investigated. Because FAST is currently unable to account for second-order effects, a method to assess these effects was applied in which linearized properties of the floating wind system derived from FAST (including the 6x6 mass and stiffness matrices) are used by WAMIT to solve the first- and second-order hydrodynamics problems in the frequency domain. The method has been applied to the OC4-DeepCwind semisubmersible platform, supporting the NREL 5-MW baseline wind turbine. The loads and response of the system due to the second-order hydrodynamics are analysed and compared to first-order hydrodynamic loads and induced motions in the frequency domain. Further, the second-order loads and induced response data are compared to the loads and motions induced by aerodynamic loading as solved by FAST.

Bayati, I.; Jonkman, J.; Robertson, A.; Platt, A.

2014-07-01T23:59:59.000Z

78

Offshore Code Comparison Collaboration within IEA Wind Task 23: Phase IV Results Regarding Floating Wind Turbine Modeling; Preprint  

SciTech Connect (OSTI)

Offshore wind turbines are designed and analyzed using comprehensive simulation codes that account for the coupled dynamics of the wind inflow, aerodynamics, elasticity, and controls of the turbine, along with the incident waves, sea current, hydrodynamics, and foundation dynamics of the support structure. This paper describes the latest findings of the code-to-code verification activities of the Offshore Code Comparison Collaboration, which operates under Subtask 2 of the International Energy Agency Wind Task 23. In the latest phase of the project, participants used an assortment of codes to model the coupled dynamic response of a 5-MW wind turbine installed on a floating spar buoy in 320 m of water. Code predictions were compared from load-case simulations selected to test different model features. The comparisons have resulted in a greater understanding of offshore floating wind turbine dynamics and modeling techniques, and better knowledge of the validity of various approximations. The lessons learned from this exercise have improved the participants' codes, thus improving the standard of offshore wind turbine modeling.

Jonkman, J.; Larsen, T.; Hansen, A.; Nygaard, T.; Maus, K.; Karimirad, M.; Gao, Z.; Moan, T.; Fylling, I.

2010-04-01T23:59:59.000Z

79

Structural health and prognostics management for offshore wind turbines : an initial roadmap.  

SciTech Connect (OSTI)

Operations and maintenance costs for offshore wind plants are expected to be significantly higher than the current costs for onshore plants. One way in which these costs may be able to be reduced is through the use of a structural health and prognostic management system as part of a condition based maintenance paradigm with smart load management. To facilitate the creation of such a system a multiscale modeling approach has been developed to identify how the underlying physics of the system are affected by the presence of damage and how these changes manifest themselves in the operational response of a full turbine. The developed methodology was used to investigate the effects of a candidate blade damage feature, a trailing edge disbond, on a 5-MW offshore wind turbine and the measurements that demonstrated the highest sensitivity to the damage were the local pitching moments around the disbond. The multiscale method demonstrated that these changes were caused by a local decrease in the blade's torsional stiffness due to the disbond, which also resulted in changes in the blade's local strain field. Full turbine simulations were also used to demonstrate that derating the turbine power by as little as 5% could extend the fatigue life of a blade by as much as a factor of 3. The integration of the health monitoring information, conceptual repair cost versus damage size information, and this load management methodology provides an initial roadmap for reducing operations and maintenance costs for offshore wind farms while increasing turbine availability and overall profit.

Griffith, Daniel Todd; Resor, Brian Ray; White, Jonathan Randall; Paquette, Joshua A.; Yoder, Nathanael C. [ATA Engineering, San Diego, CA

2012-12-01T23:59:59.000Z

80

Simulation-Length Requirements in the Loads Analysis of Offshore Floating Wind Turbines: Preprint  

SciTech Connect (OSTI)

The goal of this paper is to examine the appropriate length of a floating offshore wind turbine (FOWT) simulation - a fundamental question that needs to be answered to develop design requirements. To examine this issue, a loads analysis of an example FOWT was performed in FAST with varying simulation lengths. The offshore wind system used was the OC3-Hywind spar buoy, which was developed for use in the International Energy Agency Code Comparison Collaborative Project and supports NREL's offshore 5-megawatt baseline turbine. Realistic metocean data from the National Oceanic and Atmospheric Administration and repeated periodic wind files were used to excite the structure. The results of the analysis clearly show that loads do not increase for longer simulations. In regards to fatigue, a sensitivity analysis shows that the procedure used for counting half cycles is more important than the simulation length itself. Based on these results, neither the simulation length nor the periodic wind files affect response statistics and loads for FOWTs (at least for the spar studied here); a result in contrast to the offshore oil and gas industry, where running simulations of at least 3 hours in length is common practice.

Haid, L.; Stewart, G.; Jonkman, J.; Robertson, A.; Lackner, M.; Matha, D.

2013-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Model Development and Loads Analysis of a Wind Turbine on a Floating Offshore Tension Leg Platform  

SciTech Connect (OSTI)

This report presents results of the analysis of a 5-MW wind turbine located on a floating offshore tension leg platform (TLP) that was conducted using the fully coupled time-domain aero-hydro-servo-elastic design code FAST with AeroDyn and HydroDyn. Models in this code are of greater fidelity than most of the models that have been used to analyze floating turbines in the past--which have neglected important hydrodynamic and mooring system effects. The report provides a description of the development process of a TLP model, which is a modified version of a Massachusetts Institute of Technology design derived from a parametric linear frequency-domain optimization process. An extensive loads and stability analysis for ultimate and fatigue loads according to the procedure of the International Electrotechnical Commission offshore wind turbine design standard was performed with the verified TLP model. Response statistics, extreme event tables, fatigue lifetimes, and selected time histories of design-driving extreme events are analyzed and presented. Loads for the wind turbine on the TLP are compared to those of an equivalent land-based turbine in terms of load ratios. Major instabilities for the TLP are identified and described.

Matha, D.; Fischer, T.; Kuhn, M.; Jonkman, J.

2010-02-01T23:59:59.000Z

82

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

83

Calibration and Validation of a Spar-Type Floating Offshore Wind Turbine Model using the FAST Dynamic Simulation Tool: Preprint  

SciTech Connect (OSTI)

In 2007, the FAST wind turbine simulation tool, developed and maintained by the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL), was expanded to include capabilities that are suitable for modeling floating offshore wind turbines. In an effort to validate FAST and other offshore wind energy modeling tools, DOE funded the DeepCwind project that tested three prototype floating wind turbines at 1/50th scale in a wave basin, including a semisubmersible, a tension-leg platform, and a spar buoy. This paper describes the use of the results of the spar wave basin tests to calibrate and validate the FAST offshore floating simulation tool, and presents some initial results of simulated dynamic responses of the spar to several combinations of wind and sea states.

Browning, J. R.; Jonkman, J.; Robertson, A.; Goupee, A. J.

2012-11-01T23:59:59.000Z

84

Integrated Dynamic Analysis of Floating Offshore Wind Turbines Bjrn Skaare*, Tor David Hanson*, Finn Gunnar Nielsen*, Rune Yttervik*, Anders Melchior Hansen**,  

E-Print Network [OSTI]

Integrated Dynamic Analysis of Floating Offshore Wind Turbines Bjørn Skaare*, Tor David Hanson of floating wind turbines exposed to forces from wind, waves and current has been developed for Hydro Oil & Energy's floating wind turbine concept, HYWIND. Two existing, independent, computer program systems

85

International Effort Advances Offshore Wind Turbine Design Codes...  

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

with the Fraunhofer Institute for Wind Energy and Energy System Technology (IWES) in Germany to lead an international effort under the International Energy Agency's (IEA) Task 30...

86

NREL: Wind Research - NREL Analyzes Floating Offshore Wind Technology...  

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

representatives regarding NREL's analysis of Statoil's Hywind II offshore floating wind turbine design. Statoil's Hywind II is a 6-MW turbine on a floating spar-buoy...

87

Infauna Monitoring Horns Rev Offshore Wind Farm  

E-Print Network [OSTI]

#12;Infauna Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2004 Published: 21 April-2004................................................. 48 Wind farm area (Turbine), Reference area (Ref

88

A National Offshore Wind Strategy: Creating an Offshore Wind...  

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

A National Offshore Wind Strategy: Creating an Offshore Wind Energy Industry in the United States A National Offshore Wind Strategy: Creating an Offshore Wind Energy Industry in...

89

Advanced controls for floating wind turbines  

E-Print Network [OSTI]

Floating Offshore Wind Turbines (FOWT) is a technology that stands to spearhead the rapid growth of the offshore wind energy sector and allow the exploration of vast high quality wind resources over coastal and offshore ...

Casanovas, Carlos (Casanovas Bermejo)

2014-01-01T23:59:59.000Z

90

Incorporation of Multi-Member Substructure Capabilities in FAST for Analysis of Offshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

FAST, developed by the National Renewable Energy Laboratory (NREL), is an aero-hydro-servo-elastic tool widely used for analyzing onshore and offshore wind turbines. This paper discusses recent modifications made to FAST to enable the examination of offshore wind turbines with fixed-bottom, multi-member support structures (which are commonly used in transitional-depth waters).; This paper addresses the methods used for incorporating the hydrostatic and hydrodynamic loading on multi-member structures in FAST through its hydronamic loading module, HydroDyn. Modeling of the hydrodynamic loads was accomplished through the incorporation of Morison and buoyancy loads on the support structures. Issues addressed include how to model loads at the joints of intersecting members and on tapered and tilted members of the support structure. Three example structures are modeled to test and verify the solutions generated by the modifications to HydroDyn, including a monopile, tripod, and jacket structure. Verification is achieved through comparison of the results to a computational fluid dynamics (CFD)-derived solution using the commercial software tool STAR-CCM+.

Song, H.; Robertson, A.; Jonkman, J.; Sewell, D.

2012-05-01T23:59:59.000Z

91

This is a preprint of the following article, which is available from http://mdolab.engin.umich.edu/content/ multidisciplinary-design-optimization-offshore-wind-turbines-minimum-levelized-cost-energy. The published  

E-Print Network [OSTI]

://mdolab.engin.umich.edu/content/ multidisciplinary-design-optimization-offshore-wind-turbines-minimum-levelized-cost-energy. The published article.A.M. van Kuik. Multidisciplinary Design Optimization of Offshore Wind Turbines for Minimum Levelized Cost of Energy. Renewable Energy (In press), 2014 Multidisciplinary Design Optimization of Offshore Wind Turbines

Papalambros, Panos

92

EA-1792: University of Maine's Deepwater Offshore Floating Wind...  

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

: University of Maine's Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project, Gulf of Maine EA-1792: University of Maine's Deepwater Offshore Floating Wind...

93

Control strategies for offshore wind farms based on PMSG wind turbines and HVdc connection with uncontrolled rectifier .  

E-Print Network [OSTI]

??The selection of the bulk power transmission technology in offshore wind farms is strongly related to the wind farm size and its distance to shore.… (more)

RODRÍGUEZ D'DERLÉE, JOHEL JOSÉ

2013-01-01T23:59:59.000Z

94

University of Michigan Gets Offshore Wind Ready for Winter on...  

Energy Savers [EERE]

Project Overview Positive Impact Understanding the impact of ice on offshore wind turbines. Modeling tool to analyze the ice buildup on wind turbine blades. Locations...

95

Model Development and Loads Analysis of an Offshore Wind Turbine on a Tension Leg Platform with a Comparison to Other Floating Turbine Concepts: April 2009  

SciTech Connect (OSTI)

This report presents results of the analysis of a 5-MW wind turbine located on a floating offshore tension leg platform (TLP) that was conducted using the fully coupled time-domain aero-hydro-servo-elastic design code FAST with AeroDyn and HydroDyn. The report also provides a description of the development process of the TLP model. The model has been verified via comparisons to frequency-domain calculations. Important differences have been identified between the frequency-domain and time-domain simulations, and have generated implications for the conceptual design process. An extensive loads and stability analysis for ultimate and fatigue loads according to the procedure of the IEC 61400-3 offshore wind turbine design standard was performed with the verified TLP model. This report compares the loads for the wind turbine on the TLP to those of an equivalent land-based turbine. Major instabilities for the TLP are identified and described.

Matha, D.

2010-02-01T23:59:59.000Z

96

Investigation of a FAST-OrcaFlex Coupling Module for Integrating Turbine and Mooring Dynamics of Offshore Floating Wind Turbines: Preprint  

SciTech Connect (OSTI)

To enable offshore floating wind turbine design, the following are required: accurate modeling of the wind turbine structural dynamics, aerodynamics, platform hydrodynamics, a mooring system, and control algorithms. Mooring and anchor design can appreciably affect the dynamic response of offshore wind platforms that are subject to environmental loads. From an engineering perspective, system behavior and line loads must be studied well to ensure the overall design is fit for the intended purpose. FAST (Fatigue, Aerodynamics, Structures and Turbulence) is a comprehensive simulation tool used for modeling land-based and offshore wind turbines. In the case of a floating turbine, continuous cable theory is used to emulate mooring line dynamics. Higher modeling fidelity can be gained through the use of finite element mooring theory. This can be achieved through the FASTlink coupling module, which couples FAST with OrcaFlex, a commercial simulation tool used for modeling mooring line dynamics. In this application, FAST is responsible for capturing the aerodynamic loads and flexure of the wind turbine and its tower, and OrcaFlex models the mooring line and hydrodynamic effects below the water surface. This paper investigates the accuracy and stability of the FAST/OrcaFlex coupling operation.

Masciola, M.; Robertson, A.; Jonkman, J.; Driscoll, F.

2011-10-01T23:59:59.000Z

97

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

Broader source: Energy.gov [DOE]

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

98

Energy 101: Wind Turbines - 2014 Update  

ScienceCinema (OSTI)

See how wind turbines generate clean electricity from the power of wind. The video highlights the basic principles at work in wind turbines, and illustrates how the various components work to capture and convert wind energy to electricity. This updated version also includes information on the Energy Department's efforts to advance offshore wind power. Offshore wind energy footage courtesy of Vestas.

None

2014-06-05T23:59:59.000Z

99

Energy 101: Wind Turbines - 2014 Update  

SciTech Connect (OSTI)

See how wind turbines generate clean electricity from the power of wind. The video highlights the basic principles at work in wind turbines, and illustrates how the various components work to capture and convert wind energy to electricity. This updated version also includes information on the Energy Department's efforts to advance offshore wind power. Offshore wind energy footage courtesy of Vestas.

None

2014-05-06T23:59:59.000Z

100

Development of an Offshore Direct-Drive Wind Turbine Model by Using a Flexible Multibody Simulation (Poster)  

SciTech Connect (OSTI)

Modern wind turbines are complex, highly-coupled systems. The dynamic interaction between various components is especially pronounced for multi-megawatt wind turbines. As a result, design process is generally split in several phases. First step consists of creating a global aero-elastic model that includes essential dynamics of structural components using the minimum-possible number of degrees of freedom (d.o.f.). The most important simplifications concern drivetrain and rotor-nacelle assembly (RNA). This approach has been shown valid for several wind turbine configurations. Nevertheless, with increasing size of wind turbines, any simplified design approach must be validated. The present work deals with the comparison and validation of the two modeling approaches for directdrive offshore wind turbines. ARNA/drivetrain model idealized as collection of lumped masses and springs is compared to a detailed Finite Element Method (FEM) based model. The comparison between models focuses on dynamic loads concerning drivetrain system. The comparison is performed in several operational conditions in order to explore the range of validity of the simplified model. Finally, the paper proposes a numerical-based workflow to assess the validity of simplified models of RNA/drivetrain in an aero-elastic global WT model.

Bergua, R.; Jove, J.; Campbell, J.; Guo, Y.; Van Dam, J.

2014-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

State of the Art in Floating Wind Turbine Design Tools  

SciTech Connect (OSTI)

This paper presents an overview of the simulation codes available to the offshore wind industry that are capable of performing integrated dynamic calculations for floating offshore wind turbines.

Cordle, A.; Jonkman, J.

2011-10-01T23:59:59.000Z

102

Development and Verification of a Fully Coupled Simulator for Offshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

This report outlines the development of an analysis tool capable of analyzing a variety of wind turbine, support platform, and mooring system configurations.The simulation capability was tested by model-to-model comparisons to ensure its correctness.

Jonkman, J. M.; Buhl, M. L. Jr.

2007-01-01T23:59:59.000Z

103

New Structural-Dynamics Module for Offshore Multimember Substructures within the Wind Turbine Computer-Aided Engineering Tool FAST: Preprint  

SciTech Connect (OSTI)

FAST, developed by the National Renewable Energy Laboratory (NREL), is a computer-aided engineering (CAE) tool for aero-hydro-servo-elastic analysis of land-based and offshore wind turbines. This paper discusses recent upgrades made to FAST to enable loads simulations of offshore wind turbines with fixed-bottom, multimember support structures (e.g., jackets and tripods, which are commonly used in transitional-depth waters). The main theory and strategies for the implementation of the multimember substructure dynamics module (SubDyn) within the new FAST modularization framework are introduced. SubDyn relies on two main engineering schematizations: 1) a linear frame finite-element beam (LFEB) model and 2) a dynamics system reduction via Craig-Bampton's method. A jacket support structure and an offshore system consisting of a turbine atop a jacket substructure were simulated to test the SubDyn module and to preliminarily assess results against results from a commercial finite-element code.

Song, H.; Damiani, R.; Robertson, A.; Jonkman, J.

2013-08-01T23:59:59.000Z

104

CONGRESSIONAL BRIEFING Offshore Wind  

E-Print Network [OSTI]

CONGRESSIONAL BRIEFING Offshore Wind Lessons Learned from Europe: Reducing Costs and Creating Jobs Thursday, June 12, 2014 Capitol Visitors Center, Room SVC 215 Enough offshore wind capacity to power six the past decade. What has Europe learned that is applicable to a U.S. effort to deploy offshore wind off

Firestone, Jeremy

105

Investigation of Response Amplitude Operators for Floating Offshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

This paper examines the consistency between response amplitude operators (RAOs) computed from WAMIT, a linear frequency-domain tool, to RAOs derived from time-domain computations based on white-noise wave excitation using FAST, a nonlinear aero-hydro-servo-elastic tool. The RAO comparison is first made for a rigid floating wind turbine without wind excitation. The investigation is further extended to examine how these RAOs change for a flexible and operational wind turbine. The RAOs are computed for below-rated, rated, and above-rated wind conditions. The method is applied to a floating wind system composed of the OC3-Hywind spar buoy and NREL 5-MW wind turbine. The responses are compared between FAST and WAMIT to verify the FAST model and to understand the influence of structural flexibility, aerodynamic damping, control actions, and waves on the system responses. The results show that based on the RAO computation procedure implemented, the WAMIT- and FAST-computed RAOs are similar (as expected) for a rigid turbine subjected to waves only. However, WAMIT is unable to model the excitation from a flexible turbine. Further, the presence of aerodynamic damping decreased the platform surge and pitch responses, as computed by both WAMIT and FAST when wind was included. Additionally, the influence of gyroscopic excitation increased the yaw response, which was captured by both WAMIT and FAST.

Ramachandran, G. K. V.; Robertson, A.; Jonkman, J. M.; Masciola, M. D.

2013-07-01T23:59:59.000Z

106

EA-1970: Fishermen's Energy LLC Offshore Wind Demonstration Project...  

Office of Environmental Management (EM)

to Fishermen's Atlantic City Windfarm, LLC to construct and operate up to six wind turbine generators, for an offshore wind demonstration project, approximately 2.8 nautical...

107

Offshore Code Comparison Collaboration Continuation (OC4), Phase I - Results of Coupled Simulations of an Offshore Wind Turbine with Jacket Support Structure: Preprint  

SciTech Connect (OSTI)

This paper presents the results of the IEA Wind Task 30, Offshore Code Comparison Collaboration Continuation Project - Phase 1.

Popko, W.; Vorpahl, F.; Zuga, A.; Kohlmeier, M.; Jonkman, J.; Robertson, A.; Larsen, T. J.; Yde, A.; Saetertro, K.; Okstad, K. M.; Nichols, J.; Nygaard, T. A.; Gao, Z.; Manolas, D.; Kim, K.; Yu, Q.; Shi, W.; Park, H.; Vasquez-Rojas, A.

2012-03-01T23:59:59.000Z

108

Reliable, Lightweight Transmissions For Off-Shore, Utility Scale Wind Turbines  

SciTech Connect (OSTI)

The objective of this project was to reduce the technical risk for a hydrostatic transmission based drivetrain for high-power utility-size wind turbines. A theoretical study has been performed to validate the reduction of cost of energy (CoE) for the wind turbine, identify risk mitigation strategies for the drive system and critical components, namely the pump, shaft connection and hydrostatic transmission (HST) controls and address additional benefits such as reduced deployment costs, improved torque density and improved mean time between repairs (MTBR).

Jean-Claude Ossyra

2012-10-25T23:59:59.000Z

109

The Application of Suction Caisson Foundations to Offshore Wind Turbines Extracts from a proposal to the DTI  

E-Print Network [OSTI]

The market for offshore wind farms in the UK is expected to be substantial. The initial sites proposed offshore wind farm development may require the installation of up to fifty similar or identical units for application on offshore wind farms for the following reasons: · Suction caissons are simple steel fabrications

Byrne, Byron

110

Estimated global ocean wind power potential from QuikSCAT observations, accounting for turbine characteristics and siting  

E-Print Network [OSTI]

has more than 30 offshore wind farms in operation oraway to be unheard, offshore wind farms can contain larger,turbines considered, offshore wind farms consisting of the

Capps, Scott B; Zender, Charles S

2010-01-01T23:59:59.000Z

111

DOE Offers Conditional Commitment to Cape Wind Offshore Wind...  

Office of Environmental Management (EM)

Secretary Ernest Moniz. The proposed Cape Wind project would use 3.6-MW offshore wind turbines that would provide a majority of the electricity needed for Cape Cod, Nantucket,...

112

WINDExchange Offshore Wind Webinar: Transmission Planning and...  

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

Offshore Wind Webinar: Transmission Planning and Interconnection for Offshore Wind WINDExchange Offshore Wind Webinar: Transmission Planning and Interconnection for Offshore Wind...

113

Quantifying the Impact of Wind Turbine Wakes on Power Output at Offshore R. J. BARTHELMIE,*,1 S. C. PRYOR,*,1 S. T. FRANDSEN,1 K. S. HANSEN,# J. G. SCHEPERS,@  

E-Print Network [OSTI]

Quantifying the Impact of Wind Turbine Wakes on Power Output at Offshore Wind Farms R. J. This research is focused on improving the understanding of, and modeling of, wind turbine wakes in order to make. Differences in turbine spacing (10.5 versus 7 rotor diameters) are not differentiable in wake-related power

Pryor, Sara C.

114

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

115

Wind turbine  

DOE Patents [OSTI]

A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine speed thereby setting blade pitch, is provided with a limiter (85) which restricts unwanted pitch change at operating speeds due to torsional creep of the flexible beam. The limiter allows twisting of the beam by the governor under excessive wind velocity conditions to orient the blades in stall pitch positions, thereby preventing overspeed operation of the turbine. In the preferred embodiment, the pitch governor comprises a pendulum (65,70) which responds to changing rotor speed by pivotal movement, the limiter comprising a resilient member (90) which engages an end of the pendulum to restrict further movement thereof, and in turn restrict beam creep and unwanted blade pitch misadjustment.

Cheney, Jr., Marvin C. (Glastonbury, CT)

1982-01-01T23:59:59.000Z

116

Computation of Wave Loads under Multidirectional Sea States for Floating Offshore Wind Turbines: Preprint  

SciTech Connect (OSTI)

This paper focuses on the analysis of a floating wind turbine under multidirectional wave loading. Special attention is given to the different methods used to synthesize the multidirectional sea state. This analysis includes the double-sum and single-sum methods, as well as an equal-energy discretization of the directional spectrum. These three methods are compared in detail, including the ergodicity of the solution obtained. From the analysis, the equal-energy method proved to be the most computationally efficient while still retaining the ergodicity of the solution. This method was chosen to be implemented in the numerical code FAST. Preliminary results on the influence of these wave loads on a floating wind turbine showed significant additional roll and sway motion of the platform.

Duarte, T.; Gueydon, S.; Jonkman, J.; Sarmento, A.

2014-03-01T23:59:59.000Z

117

Modal Dynamics of Large Wind Turbines with Different Support Structures  

SciTech Connect (OSTI)

This paper presents modal dynamics of floating-platform-supported and monopile-supported offshore wind turbines.

Bir, G.; Jonkman, J.

2008-07-01T23:59:59.000Z

118

Wind turbine  

SciTech Connect (OSTI)

The improvement in a wind turbine comprises providing a tower with a freely liftable mount and adapting a nacelle which is fitted with a propeller windwheel consisting of a plurality of rotor blades and provided therein with means for conversion of wind energy to be shifted onto said mount attached to the tower. In case of a violent wind storm, the nacelle can be lowered down to the ground to protect the rotor blades from breakage due to the force of the wind. Required maintenance and inspection of the nacelle and replacement of rotor blades can be safely carried out on the ground.

Abe, M.

1982-01-19T23:59:59.000Z

119

Offshore Wind Market Acceleration Projects | Department of Energy  

Energy Savers [EERE]

on wildlife and the marine environment, and mitigating the impact of offshore wind turbines on radar and other communication and navigation equipment. The links below will...

120

Energy 101: Wind Turbines  

SciTech Connect (OSTI)

See how wind turbines generate clean electricity from the power of the wind. Highlighted are the various parts and mechanisms of a modern wind turbine.

None

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Energy 101: Wind Turbines  

ScienceCinema (OSTI)

See how wind turbines generate clean electricity from the power of the wind. Highlighted are the various parts and mechanisms of a modern wind turbine.

None

2013-05-29T23:59:59.000Z

122

Airborne Wind Turbine  

SciTech Connect (OSTI)

Broad Funding Opportunity Announcement Project: Makani Power is developing an Airborne Wind Turbine (AWT) that eliminates 90% of the mass of a conventional wind turbine and accesses a stronger, more consistent wind at altitudes of near 1,000 feet. At these altitudes, 85% of the country can offer viable wind resources compared to only 15% accessible with current technology. Additionally, the Makani Power wing can be economically deployed in deep offshore waters, opening up a resource which is 4 times greater than the entire U.S. electrical generation capacity. Makani Power has demonstrated the core technology, including autonomous launch, land, and power generation with an 8 meter wingspan, 20 kW prototype. At commercial scale, Makani Power aims to develop a 600 kW, 28 meter wingspan product capable of delivering energy at an unsubsidized cost competitive with coal, the current benchmark for low-cost power.

None

2010-09-01T23:59:59.000Z

123

innovati nNREL Computer Models Integrate Wind Turbines with  

E-Print Network [OSTI]

innovati nNREL Computer Models Integrate Wind Turbines with Floating Platforms Far off the shores for today's seabed-mounted offshore wind turbines. For the United States to tap into these vast offshore wind energy resources, wind turbines must be mounted on floating platforms to be cost effective

124

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

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

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

125

Numerical Prediction of Experimentally Observed Behavior of a Scale Model of an Offshore Wind Turbine Supported by a Tension-Leg Platform: Preprint  

SciTech Connect (OSTI)

Realizing the critical importance the role physical experimental tests play in understanding the dynamics of floating offshore wind turbines, the DeepCwind consortium conducted a one-fiftieth-scale model test program where several floating wind platforms were subjected to a variety of wind and wave loading condition at the Maritime Research Institute Netherlands wave basin. This paper describes the observed behavior of a tension-leg platform, one of three platforms tested, and the systematic effort to predict the measured response with the FAST simulation tool using a model primarily based on consensus geometric and mass properties of the test specimen.

Prowell, I.; Robertson, A.; Jonkman, J.; Stewart, G. M.; Goupee, A. J.

2013-01-01T23:59:59.000Z

126

Structural health and prognostics management for offshore wind turbines : case studies of rotor fault and blade damage with initial O&M cost modeling.  

SciTech Connect (OSTI)

Operations and maintenance costs for offshore wind plants are significantly higher than the current costs for land-based (onshore) wind plants. One way to reduce these costs would be to implement a structural health and prognostic management (SHPM) system as part of a condition based maintenance paradigm with smart load management and utilize a state-based cost model to assess the economics associated with use of the SHPM system. To facilitate the development of such a system a multi-scale modeling approach developed in prior work is used to identify how the underlying physics of the system are affected by the presence of damage and faults, and how these changes manifest themselves in the operational response of a full turbine. This methodology was used to investigate two case studies: (1) the effects of rotor imbalance due to pitch error (aerodynamic imbalance) and mass imbalance and (2) disbond of the shear web; both on a 5-MW offshore wind turbine in the present report. Based on simulations of damage in the turbine model, the operational measurements that demonstrated the highest sensitivity to the damage/faults were the blade tip accelerations and local pitching moments for both imbalance and shear web disbond. The initial cost model provided a great deal of insight into the estimated savings in operations and maintenance costs due to the implementation of an effective SHPM system. The integration of the health monitoring information and O&M cost versus damage/fault severity information provides the initial steps to identify processes to reduce operations and maintenance costs for an offshore wind farm while increasing turbine availability, revenue, and overall profit.

Myrent, Noah J. [Purdue Center for Systems Integrity, Lafayette, IN; Kusnick, Joshua F. [Purdue Center for Systems Integrity, Lafayette, IN; Barrett, Natalie C. [Purdue Center for Systems Integrity, Lafayette, IN; Adams, Douglas E. [Purdue Center for Systems Integrity, Lafayette, IN; Griffith, Daniel Todd

2013-04-01T23:59:59.000Z

127

Oxford University Civil Engineering Novel Foundations for Offshore Wind FarmsNovel Foundations for Offshore Wind Farms  

E-Print Network [OSTI]

Oxford University Civil Engineering Novel Foundations for Offshore Wind FarmsNovel Foundations for Offshore Wind Farms Prof. Guy Houlsby, Dr Byron Byrne, Dr Chris Martin Oxford University #12;Oxford each turbine does not generate all the time, say 3000) #12;Oxford University Civil Engineering Wind

Houlsby, Guy T.

128

Kentish Flats Offshore Wind Farm  

E-Print Network [OSTI]

Kentish Flats Offshore Wind Farm #12;By August 2005 the offshore wind farm at Kentish Flats plateau just outside the main Thames shipping lanes. The Kentish Flats wind farm will comprise 30 of the wind farm could be up to 90 MW. For the benefit of the environment The British Government has set

Firestone, Jeremy

129

The Future of Offshore Wind Energy  

E-Print Network [OSTI]

1 The Future of Offshore Wind Energy #12;2 #12;3 Offshore Wind Works · Offshore wind parks: 28 in 10 countries · Operational since 1991 · Current installed capacity: 1,250 MW · Offshore wind parks in the waters around Europe #12;4 US Offshore Wind Projects Proposed Atlantic Ocean Gulf of Mexico Cape Wind

Firestone, Jeremy

130

Flexible dynamics of floating wind turbines  

E-Print Network [OSTI]

This work presents Tower Flex, a structural dynamics model for a coupled analysis of offshore floating wind turbines consisting of a tower, a floating platform and a mooring system. In this multi-body, linear frequency-domain ...

Luypaert, Thomas (Thomas J.)

2012-01-01T23:59:59.000Z

131

Energy from Offshore Wind: Preprint  

SciTech Connect (OSTI)

This paper provides an overview of the nascent offshore wind energy industry including a status of the commercial offshore industry and the technologies that will be needed for full market development.

Musial, W.; Butterfield, S.; Ram, B.

2006-02-01T23:59:59.000Z

132

Offshore Wind Potential Tables  

Wind Powering America (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:SeadovCooperative JumpWilliamsonWoodsonCounty iscomfortNews Wind CollegiateOffshore wind

133

Lake Michigan Offshore Wind Feasibility Assessment  

SciTech Connect (OSTI)

The purpose of this project was to conduct the first comprehensive offshore wind assessment over Lake Michigan and to advance the body of knowledge needed to support future commercial wind energy development on the Great Lakes. The project involved evaluation and selection of emerging wind measurement technology and the permitting, installation and operation of the first mid-lake wind assessment meteorological (MET) facilities in Michigan’s Great Lakes. In addition, the project provided the first opportunity to deploy and field test floating LIDAR and Laser Wind Sensor (LWS) technology, and important research related equipment key to the sitting and permitting of future offshore wind energy development in accordance with public participation guidelines established by the Michigan Great Lakes Wind Council (GLOW). The project created opportunities for public dialogue and community education about offshore wind resource management and continued the dialogue to foster Great Lake wind resource utilization consistent with the focus of the GLOW Council. The technology proved to be effective, affordable, mobile, and the methods of data measurement accurate. The public benefited from a substantial increase in knowledge of the wind resources over Lake Michigan and gained insights about the potential environmental impacts of offshore wind turbine placements in the future. The unique first ever hub height wind resource assessment using LWS technology over water and development of related research data along with the permitting, sitting, and deployment of the WindSentinel MET buoy has captured public attention and has helped to increase awareness of the potential of future offshore wind energy development on the Great Lakes. Specifically, this project supported the acquisition and operation of a WindSentinel (WS) MET wind assessment buoy, and associated research for 549 days over multiple years at three locations on Lake Michigan. Four research objectives were defined for the project including to: 1) test and validate floating LIDAR technology; 2) collect and access offshore wind data; 3) detect and measure bird and bat activity over Lake Michigan; 4) conduct an over water sound propagation study; 5) prepare and offer a college course on offshore energy, and; 6) collect other environmental, bathometric, and atmospheric data. Desk-top research was performed to select anchorage sites and to secure permits to deploy the buoy. The project also collected and analyzed data essential to wind industry investment decision-making including: deploying highly mobile floating equipment to gather offshore wind data; correlating offshore wind data with conventional on-shore MET tower data; and performing studies that can contribute to the advancement and deployment of offshore wind technologies. Related activities included: • Siting, permitting, and deploying an offshore floating MET facility; • Validating the accuracy of floating LWS using near shoreline cup anemometer MET instruments; • Assessment of laser pulse technology (LIDAR) capability to establish hub height measurement of wind conditions at multiple locations on Lake Michigan; • Utilizing an extended-season (9-10 month) strategy to collect hub height wind data and weather conditions on Lake Michigan; • Investigation of technology best suited for wireless data transmission from distant offshore structures; • Conducting field-validated sound propagation study for a hypothetical offshore wind farm from shoreline locations; • Identifying the presence or absence of bird and bat species near wind assessment facilities; • Identifying the presence or absence of benthic and pelagic species near wind assessment facilities; All proposed project activities were completed with the following major findings: • Floating Laser Wind Sensors are capable of high quality measurement and recordings of wind resources. The WindSentinel presented no significant operational or statistical limitations in recording wind data technology at a at a high confidence level as compared to traditional an

Boezaart, Arnold [GVSU; Edmonson, James [GVSU; Standridge, Charles [GVSU; Pervez, Nahid [GVSU; Desai, Neel [University of Michigan; Williams, Bruce [University of Delaware; Clark, Aaron [GVSU; Zeitler, David [GVSU; Kendall, Scott [GVSU; Biddanda, Bopi [GVSU; Steinman, Alan [GVSU; Klatt, Brian [Michigan State University; Gehring, J. L. [Michigan State University; Walter, K. [Michigan State University; Nordman, Erik E. [GVSU

2014-06-30T23:59:59.000Z

134

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with rotational speed control systems. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotating shaft by keeping the blade span-wise direction in parallel with the shaft and being provided with aerodynamic control elements operating manually or automatically to control the rotational speed of the turbine.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

135

Development of Offshore Wind Recommended Practice for U.S. Waters: Preprint  

SciTech Connect (OSTI)

This paper discusses how the American Petroleum Institute oil and gas standards were interfaced with International Electrotechnical Commission and other wind turbine and offshore industry standards to provide guidance for reliable engineering design practices for offshore wind energy systems.

Musial, W. D.; Sheppard, R. E.; Dolan, D.; Naughton, B.

2013-04-01T23:59:59.000Z

136

Vertical axis wind turbine  

SciTech Connect (OSTI)

Wind turbines are largely divided into vertical axis wind turbines and propeller (Horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with a starting and braking control system. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotary axis by keeping the blade span-wise direction in parallel with the axis and being provided with a low speed control windmill in which the radial position of each operating piece varies with a centrifugal force produced by the rotation of the vertical rotary axis.

Kato, Y.; Seki, K.; Shimizu, Y.

1981-01-27T23:59:59.000Z

137

EA-1970: Fishermen’s Energy LLC Offshore Wind Demonstration Project, offshore Atlantic City, New Jersey  

Broader source: Energy.gov [DOE]

DOE is proposing to provide funding to Fishermen’s Energy LLC to construct and operate up to five 5.0 MW wind turbine generators, for an offshore wind demonstration project, approximately 2.8 nautical miles off the coast of Atlantic City, NJ. The proposed action includes a cable crossing from the turbines to an on-shore existing substation.

138

GEOL 663 -GEOLOGICAL ASPECTS OF OFFSHORE WIND COURSE SYLLABUS 2014 Fall Semester  

E-Print Network [OSTI]

GEOL 663 - GEOLOGICAL ASPECTS OF OFFSHORE WIND COURSE SYLLABUS ­ 2014 Fall Semester Course Meets will be designed around geological and geotechnical topics that are relevant to the development of offshore wind wind turbine foundations; 2) A review of existing, or under construction, offshore wind projects; and 3

Delaware, University of

139

Master's thesis: "Wind speed measurements in an offshore wind farm by remote sensing: Comparison of radar satellite TerraSAR-X and ground-based  

E-Print Network [OSTI]

Master's thesis: "Wind speed measurements in an offshore wind farm by remote sensing: Comparison of the Offshore wind farm alpha ventus with 12 wind turbines, substation and met mast Fino1. Southerly winds cause (wake) caused by wind farms and especially for the interaction of large offshore wind farms, which can

Peinke, Joachim

140

Wind Turbines Benefit Crops  

ScienceCinema (OSTI)

Ames Laboratory associate scientist Gene Takle talks about research into the effect of wind turbines on nearby crops. Preliminary results show the turbines may have a positive effect by cooling and drying the crops and assisting with carbon dioxide uptake.

Takle, Gene

2013-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

BAYESIAN UPDATING OF PROBABILISTIC TIME-DEPENDENT FATIGUE MODEL: APPLICATION TO JACKET FOUNDATIONS OF WIND TURBINES  

E-Print Network [OSTI]

OF WIND TURBINES Benjamin Rocher1,2 , Franck Schoefs1 , Marc François1 , Arnaud Salou2 1 LUNAM Université.rocher@univ-nantes.fr ABSTRACT Due to both wave and wind fluctuation, the metal foundations of offshore wind turbines are highly algorithm. KEYWORDS: Fatigue, Damage, Reliability, Bayesian updating. INTRODUCTION In offshore wind turbines

Boyer, Edmond

142

Barstow Wind Turbine Project  

Broader source: Energy.gov [DOE]

Presentation covers the Barstow Wind Turbine project for the Federal Utility Partnership Working Group (FUPWG) meeting, held on November 18-19, 2009.

143

Interconnection of Direct-drive Wind Turbines Using A Series Connected DC Grid.  

E-Print Network [OSTI]

??This thesis presents the concept of a "distributed HVDC converter" for offshore wind farms. The proposed converter topology allows series interconnection of wind turbines obviating… (more)

Veilleux, Etienne

2010-01-01T23:59:59.000Z

144

CONMOW: Condition Monitoring for Offshore Wind Farms  

E-Print Network [OSTI]

practice the European project CONMOW (Condition Monitoring for Offshore Wind Farms) was started in November

Edwin Wiggelinkhuizen; Theo Verbruggen; Henk Braam; Luc Rademakers; Miguel Catalin Tipluica; Andrew Maclean; Axel Juhl Christensen; Edwin Becker; Pr?ftechnik Cm Gmbh (d; Dirk Scheffler; Nordex Energy Gmbh (d

145

DOE-DOI Strategy Seeks to Harness U.S. Offshore Wind Energy Potential...  

Energy Savers [EERE]

Wind Strategy report cover featuring a photo of a receding line of offshore wind turbines in the ocean. The winds of change are blowing for renewable energy policy, and...

146

Probability distributions for offshore wind speeds Eugene C. Morgan a,*, Matthew Lackner b  

E-Print Network [OSTI]

Probability distributions for offshore wind speeds Eugene C. Morgan a,*, Matthew Lackner b Wind turbine energy output Weibull distribution Extreme wind a b s t r a c t In planning offshore wind farms, short-term wind speeds play a central role in estimating various engi- neering parameters

Vogel, Richard M.

147

Horns RevHorns Rev Offshore Wind FarmOffshore Wind Farm  

E-Print Network [OSTI]

Horns RevHorns Rev Offshore Wind FarmOffshore Wind Farm #12;Prepared for: ELSAM A/S, Overgade 45 prior to the construction of an offshore wind farm at Horns Rev, situated approximately 15 km off

148

Accelerating Offshore Wind Development | Department of Energy  

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

and support innovative offshore installations for commercial deployment by 2017. Offshore wind is a large, untapped energy resource, with the potential to generate 4,000 gigawatts...

149

U.S. Offshore Wind Advanced Technology Demonstration Projects...  

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

Offshore Wind Advanced Technology Demonstration Projects Public Meeting Transcript for Offshore Wind Demonstrations U.S. Offshore Wind Advanced Technology Demonstration Projects...

150

A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study.  

SciTech Connect (OSTI)

This analysis utilizes a 5 - MW VAWT topside design envelope created by Sandia National Laborator ies to compare floating platform options fo r each turbine in the design space. The platform designs are based on two existing designs, the OC3 Hywind spar - buoy and Principal Power's WindFloat semi - submersible. These designs are scaled using Froude - scaling relationships to determine an appropriately sized spar - buoy and semi - submersible design for each topside. Both the physical size of the required platform as well as mooring configurations are considered. Results are compared with a comparable 5 - MW HAWT in order to identify potential differences in the platform and mooring sizing between the VAWT and HAWT . The study shows that there is potential for cost savings due to reduced platform size requirements for the VAWT.

Bull, Diana L; Fowler, Matthew; Goupee, Andrew

2014-08-01T23:59:59.000Z

151

Offshore Wind Power Farm Environmental Impact Assessment  

E-Print Network [OSTI]

Horns Rev Offshore Wind Power Farm Environmental Impact Assessment on Water Quality #12;Prepared with a planned 150 MW offshore wind farm at Horns Rev, an assessment was made of the effects the wind farm would for the preparation of EIA studies for offshore wind farms." Horns Rev is situated off Blåvands Huk, which is Denmark

152

Sensitivity Analysis of Offshore Wind Cost of Energy (Poster)  

SciTech Connect (OSTI)

No matter the source, offshore wind energy plant cost estimates are significantly higher than for land-based projects. For instance, a National Renewable Energy Laboratory (NREL) review on the 2010 cost of wind energy found baseline cost estimates for onshore wind energy systems to be 71 dollars per megawatt-hour ($/MWh), versus 225 $/MWh for offshore systems. There are many ways that innovation can be used to reduce the high costs of offshore wind energy. However, the use of such innovation impacts the cost of energy because of the highly coupled nature of the system. For example, the deployment of multimegawatt turbines can reduce the number of turbines, thereby reducing the operation and maintenance (O&M) costs associated with vessel acquisition and use. On the other hand, larger turbines may require more specialized vessels and infrastructure to perform the same operations, which could result in higher costs. To better understand the full impact of a design decision on offshore wind energy system performance and cost, a system analysis approach is needed. In 2011-2012, NREL began development of a wind energy systems engineering software tool to support offshore wind energy system analysis. The tool combines engineering and cost models to represent an entire offshore wind energy plant and to perform system cost sensitivity analysis and optimization. Initial results were collected by applying the tool to conduct a sensitivity analysis on a baseline offshore wind energy system using 5-MW and 6-MW NREL reference turbines. Results included information on rotor diameter, hub height, power rating, and maximum allowable tip speeds.

Dykes, K.; Ning, A.; Graf, P.; Scott, G.; Damiami, R.; Hand, M.; Meadows, R.; Musial, W.; Moriarty, P.; Veers, P.

2012-10-01T23:59:59.000Z

153

A MODULAR SHM-SCHEME FOR ENGINEERING STRUCTURES UNDER CHANGING CONDITIONS: APPLICATION TO AN OFFSHORE WIND  

E-Print Network [OSTI]

TO AN OFFSHORE WIND TURBINE Moritz W. H¨ackell1, Raimund Rolfes1 1 Institute of Structural Analysis, Leibniz in common. A shift from fossil to renewable energy source is the logical con- sequence. (Offshore) wind of remote offshore plants and an ageing fleet of onshore structures raise the demand of structural health

Paris-Sud XI, Université de

154

EA-1970: Fishermen’s Energy LLC Offshore Wind Demonstration Project, offshore Atlantic City, New Jersey  

Broader source: Energy.gov [DOE]

Draft EA: Public Comment Period Ends 04/03/15DOE is proposing to provide funding to Fishermen’s Atlantic City Windfarm, LLC to construct and operate up to six wind turbine generators, for an offshore wind demonstration project, approximately 2.8 nautical miles off the coast of Atlantic City, NJ. The proposed action includes a cable crossing from the turbines to an on-shore existing substation.

155

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett; Danforth, William; Bevington, Christopher; Jesse, Stowell; Costin, Daniel

2006-10-10T23:59:59.000Z

156

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett; Danforth, William; Bevington, Christopher; Stowell, Jesse; Costin, Daniel

2006-07-11T23:59:59.000Z

157

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett Lee; Danforth, William; Bevington, Christopher; Stowell, Jesse; Costin, Daniel

2006-09-19T23:59:59.000Z

158

Direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The turbine includes a direct drive generator having an integrated disk brake positioned radially inside the stator while minimizing the potential for contamination. The turbine further includes a means for mounting a transformer below the nacelle within the tower.

Bywaters, Garrett; Danforth, William; Bevington, Christopher; Jesse, Stowell; Costin, Daniel

2007-02-27T23:59:59.000Z

159

Influence of Control on the Pitch Damping of a Floating Wind Turbine  

SciTech Connect (OSTI)

This paper presents the influence of conventional wind turbine blade-pitch control actions on the pitch damping of a wind turbine supported by an offshore floating barge with catenary moorings.

Jonkman, J. M.

2008-03-01T23:59:59.000Z

160

Offshore Wind Energy Market Overview (Presentation)  

SciTech Connect (OSTI)

This presentation describes the current international market conditions regarding offshore wind, including the breakdown of installation costs, how to reduce costs, and the physical siting considerations considered when planning offshore wind construction. The presentation offers several examples of international existing and planned offshore wind farm sites and compares existing international offshore resources with U.S. resources. The presentation covers future offshore wind trends and cites some challenges that the United States must overcome before it will be able to fully develop offshore wind sites.

Baring-Gould, I.

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Vertical axis wind turbines  

DOE Patents [OSTI]

A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.

Krivcov, Vladimir (Miass, RU); Krivospitski, Vladimir (Miass, RU); Maksimov, Vasili (Miass, RU); Halstead, Richard (Rohnert Park, CA); Grahov, Jurij (Miass, RU)

2011-03-08T23:59:59.000Z

162

New Report Characterizes Existing Offshore Wind Grid Interconnection...  

Office of Environmental Management (EM)

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

163

Infauna Monitoring Horns Rev Offshore Wind Farm  

E-Print Network [OSTI]

Infauna Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2003 #12;Infauna Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2003 Published: 13 May 2004 Prepared: Michael Bech

164

Wind Turbine Acoustic Noise A white paper  

E-Print Network [OSTI]

Wind Turbine Acoustic Noise A white paper Prepared by the Renewable Energy Research Laboratory...................................................................... 8 Sound from Wind Turbines .............................................................................................. 10 Sources of Wind Turbine Sound

Massachusetts at Amherst, University of

165

Horns RevHorns Rev Offshore Wind FarmOffshore Wind Farm  

E-Print Network [OSTI]

Horns RevHorns Rev Offshore Wind FarmOffshore Wind Farm #12;Prepared for: ELSAM A/S, Overgade 45 to establish an offshore wind farm with an output of 150 MW in the waters of Horns Rev, approximately 15 km off to some environmental guidelines for offshore wind farms prepared by the Dani

166

Wind Turbine Blockset General Overview  

E-Print Network [OSTI]

Wind Turbine Blockset in Saber General Overview and Description of the Models Florin Iov, Adrian Turbine Blockset in Saber Abstract. This report presents a new developed Saber Toolbox for wind turbine, optimize and design wind turbines". The report provides a quick overview of the Saber and then explains

167

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

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

6th Framework Programme Peter Hjuler Jensen, Ris National Laboratory, Summary: of wind turbines for future very large-scale applications, e.g. offshore wind farms of several...

168

OFFSHORE WIND FARMS Guidance note for Environmental  

E-Print Network [OSTI]

OFFSHORE WIND FARMS Guidance note for Environmental Impact Assessment In respect of FEPA and CPA requirements Version 2 - June 2004 #12;Offshore Wind Farms: Guidance Note for Environmental Impact Assessment 2004 #12;Offshore Wind Farms: Guidance Note for Environmental Impact Assessment in Respect of FEPA

169

Offshore wind resource assessment through satellite images  

E-Print Network [OSTI]

1 Slide no. 4 Offshore wind resource assessment through satellite images Charlotte Bay Hasager images for offshore wind ressource assessment in lieu of in-situ mast observations #12;4 Slide no Hasager, Dellwik, Nielsen and Furevik, 2004, Validation of ERS-2 SAR offshore wind-speed maps in the North

170

Optimization of Wind Turbine Operation  

E-Print Network [OSTI]

Optimization of Wind Turbine Operation by Use of Spinner Anemometer TF Pedersen, NN Sørensen, L Title: Optimization of Wind Turbine Operation by Use of Spinner Anemometer Department: Wind Energy prototype wind turbine. Statistics of the yaw error showed an average of about 10°. The average flow

171

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

172

Sandia National Laboratories: Innovative Offshore Vertical-Axis...  

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

WindInnovative Offshore Vertical-Axis Wind Turbine Rotors Innovative Offshore Vertical-Axis Wind Turbine Rotors This project seeks to advance large offshore vertical-axis wind...

173

NREL Computer Models Integrate Wind Turbines with Floating Platforms (Fact Sheet)  

SciTech Connect (OSTI)

Far off the shores of energy-hungry coastal cities, powerful winds blow over the open ocean, where the water is too deep for today's seabed-mounted offshore wind turbines. For the United States to tap into these vast offshore wind energy resources, wind turbines must be mounted on floating platforms to be cost effective. Researchers at the National Renewable Energy Laboratory (NREL) are supporting that development with computer models that allow detailed analyses of such floating wind turbines.

Not Available

2011-07-01T23:59:59.000Z

174

A Predictive Maintenance Policy Based on the Blade of Offshore Wind Wenjin Zhu, Troyes University of Technology  

E-Print Network [OSTI]

A Predictive Maintenance Policy Based on the Blade of Offshore Wind Turbine Wenjin Zhu, Troyes, Paris-Erdogan law, rotor blade, wind turbine SUMMARY & CONCLUSIONS Based on the modeling and the better quality of the wind resource in the sea, the installation of wind turbines is shifting from

McCalley, James D.

175

National Offshore Wind Energy Grid Interconnection Study  

SciTech Connect (OSTI)

The National Offshore Wind Energy Grid Interconnection Study (NOWEGIS) considers the availability and potential impacts of interconnecting large amounts of offshore wind energy into the transmission system of the lower 48 contiguous United States. A total of 54GW of offshore wind was assumed to be the target for the analyses conducted. A variety of issues are considered including: the anticipated staging of offshore wind; the offshore wind resource availability; offshore wind energy power production profiles; offshore wind variability; present and potential technologies for collection and delivery of offshore wind energy to the onshore grid; potential impacts to existing utility systems most likely to receive large amounts of offshore wind; and regulatory influences on offshore wind development. The technologies considered the reliability of various high-voltage ac (HVAC) and high-voltage dc (HVDC) technology options and configurations. The utility system impacts of GW-scale integration of offshore wind are considered from an operational steady-state perspective and from a regional and national production cost perspective.

Daniel, John P. [ABB Inc; Liu, Shu [ABB Inc; Ibanez, Eduardo [National Renewable Energy Laboratory; Pennock, Ken [AWS Truepower; Reed, Greg [University of Pittsburgh; Hanes, Spencer [Duke Energy

2014-07-30T23:59:59.000Z

176

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

177

RESEARCH ARTICLE Dynamic wind loads and wake characteristics of a wind turbine  

E-Print Network [OSTI]

installed in onshore or/and offshore wind farms in order to meet the 20% electricity generation goal. WindRESEARCH ARTICLE Dynamic wind loads and wake characteristics of a wind turbine model in an atmospheric boundary layer wind Hui Hu · Zifeng Yang · Partha Sarkar Received: 16 August 2011 / Revised: 1

Hu, Hui

178

Model Predictive Control Wind Turbines  

E-Print Network [OSTI]

Model Predictive Control of Wind Turbines Martin Klauco Kongens Lyngby 2012 IMM-MSc-2012-65 #12;Summary Wind turbines are the biggest part of the green energy industry. Increasing interest control strategies. Control strategy has a significant impact on the wind turbine operation on many levels

179

Offshore Code Comparison Collaboration within IEA Wind Annex XXIII: Phase III Results Regarding Tripod Support Structure Modeling  

SciTech Connect (OSTI)

Offshore wind turbines are designed and analyzed using comprehensive simulation codes. This paper describes the findings of code-to-code verification activities of the IEA Offshore Code Comparison Collaboration.

Nichols, J.; Camp, T.; Jonkman, J.; Butterfield, S.; Larsen, T.; Hansen, A.; Azcona, J.; Martinez, A.; Munduate, X.; Vorpahl, F.; Kleinhansl, S.; Kohlmeier, M.; Kossel, T.; Boker, C.; Kaufer, D.

2009-01-01T23:59:59.000Z

180

Strengthening America's Energy Security with Offshore Wind (Fact Sheet) (Revised)  

SciTech Connect (OSTI)

This fact sheet provides a brief description of offshore wind energy development in the U.S. and DOE's Wind Program offshore wind R&D activities.

Not Available

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

SciTech Connect: Offshore Wind Jobs and Economic Development...  

Office of Scientific and Technical Information (OSTI)

Technologies Office Country of Publication: United States Language: English Subject: 17 WIND ENERGY; 29 ENERGY PLANNING, POLICY AND ECONOMY OFFSHORE WIND JOBS; OFFSHORE WIND...

182

Quantifying Offshore Wind Resources from Satellite Wind Maps  

E-Print Network [OSTI]

Quantifying Offshore Wind Resources from Satellite Wind Maps: Study Area the North Sea C. B National Laboratory, Roskilde, Denmark Offshore wind resources are quantified from satellite synthetic site at Horns Rev is given based on satellite SAR observa- tions.The comparison of offshore satellite

Pryor, Sara C.

183

American Wind Energy Association Offshore WINDPOWER Conference...  

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

Offshore WINDPOWER Conference & Exhibition American Wind Energy Association Offshore WINDPOWER Conference & Exhibition October 7, 2014 9:00AM EDT to October 8, 2014 5:00PM EDT AWEA...

184

Tornado type wind turbines  

DOE Patents [OSTI]

A tornado type wind turbine has a vertically disposed wind collecting tower with spaced apart inner and outer walls and a central bore. The upper end of the tower is open while the lower end of the structure is in communication with a wind intake chamber. An opening in the wind chamber is positioned over a turbine which is in driving communication with an electrical generator. An opening between the inner and outer walls at the lower end of the tower permits radially flowing air to enter the space between the inner and outer walls while a vertically disposed opening in the wind collecting tower permits tangentially flowing air to enter the central bore. A porous portion of the inner wall permits the radially flowing air to interact with the tangentially flowing air so as to create an intensified vortex flow which exits out of the top opening of the tower so as to create a low pressure core and thus draw air through the opening of the wind intake chamber so as to drive the turbine.

Hsu, Cheng-Ting (Ames, IA)

1984-01-01T23:59:59.000Z

185

Wind turbine spoiler  

DOE Patents [OSTI]

An aerodynamic spoiler system for a vertical axis wind turbine includes spoilers on the blades initially stored near the rotor axis to minimize drag. A solenoid latch adjacent the central support tower releases the spoilers and centrifugal force causes the spoilers to move up the turbine blades away from the rotor axis, thereby producing a braking effect and actual slowing of the associated wind turbine, if desired. The spoiler system can also be used as an infinitely variable power control by regulated movement of the spoilers on the blades over the range between the undeployed and fully deployed positions. This is done by the use of a suitable powered reel and cable located at the rotor tower to move the spoilers.

Sullivan, William N. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

186

VARIABLE SPEED WIND TURBINE  

E-Print Network [OSTI]

Wind energy is currently the fastest-growing renewable source of energy in India; India is a key market for the wind industry, presenting substantial opportunities for both the international and domestic players. In India the research is carried out on wind energy utilization on big ways.There are still many unsolved challenges in expanding wind power, and there are numerous problems of interest to systems and control researchers. In this paper we study the pitch control mechanism of wind turbine. The pitch control system is one of the most widely used control techniques to regulate the output power of a wind turbine generator. The pitch angle is controlled to keep the generator power at rated power by reducing the angle of the blades. By regulating, the angle of stalling, fast torque changes from the wind will be reutilized. It also describes the design of the pitch controller and discusses the response of the pitch-controlled system to wind velocity variations. The pitch control system is found to have a large output power variation and a large settling time.

Chatinderpal Singh

187

Offshore Wind in NY State (New York)  

Broader source: Energy.gov [DOE]

NYSERDA has expressed support for the development of offshore wind and committed funding to several publicly-available assessments that measure the potential energy benefits and environmental...

188

Virginia Offshore Wind Development Authority (Virginia)  

Broader source: Energy.gov [DOE]

The Virginia Offshore Wind Development Authority is a public body, established for the purposes of facilitating, coordinating, and supporting the development, either by the Authority or by other...

189

WIND TURBINE STRUCTURAL HEALTH MONITORING: A SHORT INVESTIGATION BASED ON SCADA DATA  

E-Print Network [OSTI]

WIND TURBINE STRUCTURAL HEALTH MONITORING: A SHORT INVESTIGATION BASED ON SCADA DATA E. Papatheou1.papatheou@sheffield.ac.uk ABSTRACT The use of offshore wind farms has been growing in recent years, as steadier and higher wind to complicate the construction of land wind farms, offshore locations, which can be found more easily near

Boyer, Edmond

190

Optimum propeller wind turbines  

SciTech Connect (OSTI)

The Prandtl-Betz-Theodorsen theory of heavily loaded airscrews has been adapted to the design of propeller windmills which are to be optimized for maximum power coefficient. It is shown that the simpler, light-loading, constant-area wake assumption can generate significantly different ''optimum'' performance and geometry, and that it is therefore not appropriate to the design of propeller wind turbines when operating in their normal range of high-tip-speed-to-wind-speed ratio. Design curves for optimum power coefficient are presented and an example of the design of a typical two-blade optimum rotor is given.

Sanderson, R.J.; Archer, R.D.

1983-11-01T23:59:59.000Z

191

Airfoils for wind turbine  

DOE Patents [OSTI]

Airfoils are disclosed for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of airfoils for a blade 1 to 5 meters in length, and a family of airfoils for a blade 5 to 10 meters in length. 10 figs.

Tangler, J.L.; Somers, D.M.

1996-10-08T23:59:59.000Z

192

Airfoils for wind turbine  

DOE Patents [OSTI]

Airfoils for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of airfoils for a blade 1 to 5 meters in length, and a family of airfoils for a blade 5 to 10 meters in length.

Tangler, James L. (Boulder, CO); Somers, Dan M. (State College, PA)

1996-01-01T23:59:59.000Z

193

20% Wind Energy by 2030 - Chapter 2: Wind Turbine Technology...  

Office of Environmental Management (EM)

20% Wind Energy by 2030: Increasing Wind Energy's Contribution to U.S. Electricity Supply U.S. Offshore Wind Manufacturing and Supply Chain Development Wind Program Accomplishments...

194

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network [OSTI]

and Scope Wind energy is growing and turbines are regularlyfor Design of Wind Turbines. Wind Energy Department of Risøloads on wind turbines. ” European Wind Energy Conference

Prowell, I.

2011-01-01T23:59:59.000Z

195

Assessment of Offshore Wind System Design, Safety, and Operation...  

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

Assessment of Offshore Wind System Design, Safety, and Operation Standards Assessment of Offshore Wind System Design, Safety, and Operation Standards The U.S. Department of...

196

EIS-0470: Cape Wind Energy Project, Nantucket Sound, Offshore...  

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

0: Cape Wind Energy Project, Nantucket Sound, Offshore of Massachusetts EIS-0470: Cape Wind Energy Project, Nantucket Sound, Offshore of Massachusetts June 25, 2014 EIS-0470: Cape...

197

SciTech Connect: Offshore Wind Jobs and Economic Development...  

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

Offshore Wind Jobs and Economic Development Impact: Four Regional Scenarios (Presentation) Citation Details In-Document Search Title: Offshore Wind Jobs and Economic Development...

198

DOE Announces Webinars on an Offshore Wind Economic Impacts Model...  

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

an Offshore Wind Economic Impacts Model, Resources for Tribal Energy Efficiency Projects, and More DOE Announces Webinars on an Offshore Wind Economic Impacts Model, Resources for...

199

WINDExchange Webinar: Economic Impacts of Offshore Wind: Market...  

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

WINDExchange Webinar: Economic Impacts of Offshore Wind: Market, Manufacturing, and Jobs WINDExchange Webinar: Economic Impacts of Offshore Wind: Market, Manufacturing, and Jobs...

200

Study Finds 54 Gigawatts of Offshore Wind Capacity Technically...  

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

Study Finds 54 Gigawatts of Offshore Wind Capacity Technically Possible by 2030 Study Finds 54 Gigawatts of Offshore Wind Capacity Technically Possible by 2030 September 11, 2014 -...

Note: This page contains sample records for the topic "offshore wind turbines" 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

Advanced Offshore Wind Tech: Accelerating New Opportunities for...  

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

Advanced Offshore Wind Tech: Accelerating New Opportunities for Clean Energy Advanced Offshore Wind Tech: Accelerating New Opportunities for Clean Energy May 7, 2014 - 12:11pm...

202

New Report Shows Trend Toward Larger Offshore Wind Systems, with...  

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

offshore wind energy technologies. Addthis Related Articles New Reports Highlight Major Potential in Offshore Wind Energy Developing Integrated National Design Standards for...

203

Assessment of Offshore Wind Energy Resources for the United States...  

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

Offshore Wind Energy Resources for the United States This report summarizes the offshore wind resource potential for the contiguous United States and Hawaii as of May 2009. The...

204

Computational Aerodynamics and Aeroacoustics for Wind Turbines  

E-Print Network [OSTI]

Computational Aerodynamics and Aeroacoustics for Wind Turbines #12;#12;Computational Aerodynamics and Aeroacoustics for Wind Turbines Wen Zhong Shen Fluid Mechanics Department of Mechanical Engineering TECHNICAL Shen, Wen Zhong Computational Aerodynamics and Aeroacoustics for Wind Turbines Doctor Thesis Technical

205

U.S. Offshore Wind Manufacturing and Supply Chain Development  

SciTech Connect (OSTI)

The objective of the report is to provide an assessment of the domestic supply chain and manufacturing infrastructure supporting the U.S. offshore wind market. The report provides baseline information and develops a strategy for future development of the supply chain required to support projected offshore wind deployment levels. A brief description of each of the key chapters includes: » Chapter 1: Offshore Wind Plant Costs and Anticipated Technology Advancements. Determines the cost breakdown of offshore wind plants and identifies technical trends and anticipated advancements in offshore wind manufacturing and construction. » Chapter 2: Potential Supply Chain Requirements and Opportunities. Provides an organized, analytical approach to identifying and bounding the uncertainties associated with a future U.S. offshore wind market. It projects potential component-level supply chain needs under three demand scenarios and identifies key supply chain challenges and opportunities facing the future U.S. market as well as current suppliers of the nation’s land-based wind market. » Chapter 3: Strategy for Future Development. Evaluates the gap or competitive advantage of adding manufacturing capacity in the U.S. vs. overseas, and evaluates examples of policies that have been successful . » Chapter 4: Pathways for Market Entry. Identifies technical and business pathways for market entry by potential suppliers of large-scale offshore turbine components and technical services. The report is intended for use by the following industry stakeholder groups: (a) Industry participants who seek baseline cost and supplier information for key component segments and the overall U.S. offshore wind market (Chapters 1 and 2). The component-level requirements and opportunities presented in Section 2.3 will be particularly useful in identifying market sizes, competition, and risks for the various component segments. (b) Federal, state, and local policymakers and economic development agencies, to assist in identifying policies with low effort and high impact (Chapter 3). Section 3.3 provides specific policy examples that have been demonstrated to be effective in removing barriers to development. (c) Current and potential domestic suppliers in the offshore wind market, in evaluating areas of opportunity and understanding requirements for participation (Chapter 4). Section 4.4 provides a step-by-step description of the qualification process that suppliers looking to sell components into a future U.S. offshore wind market will need to follow.

Hamilton, Bruce Duncan [Navigant Consulting, Inc.

2013-02-22T23:59:59.000Z

206

Hydrodynamics and drive-train dynamics of a direct-drive floating wind turbine   

E-Print Network [OSTI]

Floating wind turbines (FWTs) are considered a new lease of opportunity for sustaining growth from offshore wind energy. In recent years, several new concepts have emerged, with only a few making it to demonstration or ...

Sethuraman, Latha

2014-06-30T23:59:59.000Z

207

Vertical axis wind turbine acoustics  

E-Print Network [OSTI]

Vertical Axis Wind Turbine Acoustics Charlie Pearson Corpus Christi College Cambridge University Engineering Department A thesis submitted for the degree of Doctor of Philosophy September 2013 Declaration Described in this dissertation is work... quickly to changing wind conditions, small- scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where the wind is more gusty in nature. If VAWTs are erected in built up areas...

Pearson, Charlie

2014-04-08T23:59:59.000Z

208

Part of the Climate Change Problem . . . and the Solution? Chinese-Made Wind Power Technology and Opportunities for Dissemination  

E-Print Network [OSTI]

plans for onshore and offshore wind energy development in early problems with offshore wind turbines. 20 Figure 3.  

Lewis, Joanna I.

2005-01-01T23:59:59.000Z

209

Addressing Wind Turbine Tribological Challenges with Surface...  

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

Addressing Wind Turbine Tribological Challenges with Surface Engineering Presented by Gary Doll of the University of Akron at the Wind Turbine Tribology Seminar 2014. Addressing...

210

Offshore Wind Farms – the Impact on Wind Farm Planning and Cost of Generation  

E-Print Network [OSTI]

rates of planning and construction of new wind farms. Offshore wind farms typically offer the benefits

Jacob Ladeburg; Sanja Lutzeyer

211

INTRODUCTION Currently, wind turbines can incur unforeseen damage up to five times a year.  

E-Print Network [OSTI]

1 1 INTRODUCTION Currently, wind turbines can incur unforeseen damage up to five times a year. Particularly during bad weather, wind turbines located offshore are difficult to access for visual inspection functional modules that track changes in the global dynamic behaviour of both the turbine tower and blade

Lynch, Jerome P.

212

NREL: Wind Research - NREL Assesses National Design Standards...  

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

Assesses National Design Standards for Offshore Wind Energy Projects This photo shows a row of offshore wind turbines from a vertical perspective. The blades from each turbine are...

213

Department of Energy Awards $43 Million to Spur Offshore Wind Energy, Wind Program Newsletter, September 2011 Edition (Brochure)  

SciTech Connect (OSTI)

EERE Wind Program Quarterly Newsletter - September 2011. In September, the U.S. Department of Energy announced that it will award $43 million over the next five years to 41 projects across 20 states to speed technical innovations, lower costs, and shorten the timeline for deploying offshore wind energy systems. The projects will advance wind turbine design tools and hardware, improve information about U.S. offshore wind resources, and accelerate the deployment of offshore wind by reducing market barriers such as supply chain development, transmission and infrastructure. The projects announced in September focus on approaches to advancing offshore technology and removing market barriers to responsible offshore wind energy deployment. Funding is subject to Congressional appropriations.

Not Available

2011-09-01T23:59:59.000Z

214

The Inside of a Wind Turbine  

Broader source: Energy.gov [DOE]

Wind turbines harness the power of the wind and use it to generate electricity. Simply stated, a wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan,...

215

Challenges in Predicting Power Output from Offshore Wind Farms  

E-Print Network [OSTI]

Challenges in Predicting Power Output from Offshore Wind Farms R. J. Barthelmie1 and S. C. Pryor2 Abstract: Offshore wind energy is developing rapidly in Europe and the trend is towards large wind farms an offshore wind farm, accurate assessment of the wind resource/power output from the wind farm is a necessity

Pryor, Sara C.

216

Using satellite data for mapping offshore wind resources and wakes  

E-Print Network [OSTI]

(no wind) Horns Rev Offshore Wind Farm Blaavandshuk Met. mast N #12;Wind Horns Rev Wind speed map from · Wake near large offshore wind farms is quantified in space and time · Software for usersUsing satellite data for mapping offshore wind resources and wakes Charlotte Bay Hasager, Merete

217

The wind speed profile at offshore wind farm sites Bernhard Lange(1)  

E-Print Network [OSTI]

The wind speed profile at offshore wind farm sites Bernhard Lange(1) , Søren E. Larsen(2) , Jørgen in Europe will come from offshore sites. The first large offshore wind farms are #12;currently being built feasibility of offshore wind power utilisation depends on the favourable wind conditions offshore compared

Heinemann, Detlev

218

Estimation of Wind Speed in Connection to a Wind Turbine  

E-Print Network [OSTI]

Estimation of Wind Speed in Connection to a Wind Turbine X. Ma #3; , N. K. Poulsen #3; , H. Bindner y December 20, 1995 Abstract The wind speed varies over the rotor plane of wind turbine making the wind speed on the rotor plane will be estimated by using a wind turbine as a wind measuring device

219

The Estimated Global Ocean Wind Power Potential from QuikSCAT Observations, Accounting for Turbine  

E-Print Network [OSTI]

The Estimated Global Ocean Wind Power Potential from QuikSCAT Observations, Accounting for Turbine: (949) 824-3256 Abstract For the first time, global ocean usable wind power is evaluated for modern offshore turbine characteristics including hub height, usable portion of the wind speed distri- bution

Zender, Charles

220

EA-1992: Funding for Principle Power, Inc., for the WindFloat Pacific Offshore Wind Demonstration Project, offshore of Coos Bay, Oregon  

Broader source: Energy.gov [DOE]

Funding for Principle Power, Inc., for the WindFloat Pacific Offshore Wind Demonstration Project, offshore of Coos Bay, Oregon

Note: This page contains sample records for the topic "offshore wind turbines" 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

Installing Small Wind Turbines Seminar and Workshop  

E-Print Network [OSTI]

Seminar and Workshop Installing Small Wind Turbines Seminar and Workshop Location: Murdoch January 2011 Details for Registration and Payment: Mr Daniel Jones, National Small Wind Turbine Test: The National Small Wind Turbine Centre at Murdoch University is holding a Small Wind Turbine short training

222

Wind turbine rotor aileron  

DOE Patents [OSTI]

A wind turbine has a rotor with at least one blade which has an aileron which is adjusted by an actuator. A hinge has two portions, one for mounting a stationary hinge arm to the blade, the other for coupling to the aileron actuator. Several types of hinges can be used, along with different actuators. The aileron is designed so that it has a constant chord with a number of identical sub-assemblies. The leading edge of the aileron has at least one curved portion so that the aileron does not vent over a certain range of angles, but vents if the position is outside the range. A cyclic actuator can be mounted to the aileron to adjust the position periodically. Generally, the aileron will be adjusted over a range related to the rotational position of the blade. A method for operating the cyclic assembly is also described.

Coleman, Clint (Warren, VT); Kurth, William T. (Warren, VT)

1994-06-14T23:59:59.000Z

223

SERI advanced wind turbine blades  

SciTech Connect (OSTI)

The primary goal of the Solar Energy Research Institute`s (SERI) advanced wind turbine blades is to convert the kinetic energy in the wind into mechanical energy in an inexpensive and efficient manner. To accomplish this goal, advanced wind turbine blades have been developed by SERI that utilize unique airfoil technology. Performance characteristics of the advanced blades were verified through atmospheric testing on fixed-pitch, stall-regulated horizontal-axis wind turbines (HAWTs). Of the various wind turbine configurations, the stall-regulated HAWT dominates the market because of its simplicity and low cost. Results of the atmospheric tests show that the SERI advanced blades produce 10% to 30% more energy than conventional blades. 6 refs.

Tangler, J.; Smith, B.; Jager, D.

1992-02-01T23:59:59.000Z

224

SERI advanced wind turbine blades  

SciTech Connect (OSTI)

The primary goal of the Solar Energy Research Institute's (SERI) advanced wind turbine blades is to convert the kinetic energy in the wind into mechanical energy in an inexpensive and efficient manner. To accomplish this goal, advanced wind turbine blades have been developed by SERI that utilize unique airfoil technology. Performance characteristics of the advanced blades were verified through atmospheric testing on fixed-pitch, stall-regulated horizontal-axis wind turbines (HAWTs). Of the various wind turbine configurations, the stall-regulated HAWT dominates the market because of its simplicity and low cost. Results of the atmospheric tests show that the SERI advanced blades produce 10% to 30% more energy than conventional blades. 6 refs.

Tangler, J.; Smith, B.; Jager, D.

1992-02-01T23:59:59.000Z

225

WIND TURBINE DRIVETRAIN TEST FACILITY DATA ACQUISITION SYSTEM  

SciTech Connect (OSTI)

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

Mcintosh, J.

2012-01-03T23:59:59.000Z

226

Strengthening America's Energy Security with Offshore Wind (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the current state of the offshore wind industry in the United States and the offshore wind research and development activities conducted the U.S. Department of Energy Wind and Water Power Program.

Not Available

2012-02-01T23:59:59.000Z

227

ORIGINAL PAPER Review of Methodologies for Offshore Wind Resource  

E-Print Network [OSTI]

ORIGINAL PAPER Review of Methodologies for Offshore Wind Resource Assessment in European Seas A. M offshore is generally larger than at geographically nearby onshore sites, which can offset the higher installation, operation and maintenance costs associated with offshore wind parks. Successful offshore wind

Pryor, Sara C.

228

Offshore Wind Plant Balance-of-Station Cost Drivers and Sensitivities (Poster)  

SciTech Connect (OSTI)

With Balance of System (BOS) costs contributing up to 70% of the installed capital cost, it is fundamental to understanding the BOS costs for offshore wind projects as well as potential cost trends for larger offshore turbines. NREL developed a BOS model using project cost estimates developed by GL Garrad Hassan. Aspects of BOS covered include engineering and permitting, ports and staging, transportation and installation, vessels, foundations, and electrical. The data introduce new scaling relationships for each BOS component to estimate cost as a function of turbine parameters and size, project parameters and size, and soil type. Based on the new BOS model, an analysis to understand the non-turbine costs associated with offshore turbine sizes ranging from 3 MW to 6 MW and offshore wind plant sizes ranging from 100 MW to 1000 MW has been conducted. This analysis establishes a more robust baseline cost estimate, identifies the largest cost components of offshore wind project BOS, and explores the sensitivity of the levelized cost of energy to permutations in each BOS cost element. This presentation shows results from the model that illustrates the potential impact of turbine size and project size on the cost of energy from US offshore wind plants.

Saur, G.; Maples, B.; Meadows, B.; Hand, M.; Musial, W.; Elkington, C.; Clayton, J.

2012-09-01T23:59:59.000Z

229

Robust 1550-nm single-frequency all-fiber ns-pulsed fiber amplifier for wind-turbine predictive control by wind lidar  

E-Print Network [OSTI]

Oldenburg, Germany ABSTRACT Scaling of the power yield of offshore wind farms relies on the capacity powers [1]. To reach the ambitious and politically motivated aims of Multi-GW offshore wind farms belongs to this category. Clustered in wind farms, today's wind turbines produce Megawatt-level output

Oldenburg, Carl von Ossietzky Universität

230

Parametric design of floating wind turbines  

E-Print Network [OSTI]

As the price of energy increases and wind turbine technology matures, it is evident that cost effective designs for floating wind turbines are needed. The next frontier for wind power is the ocean, yet development in near ...

Tracy, Christopher (Christopher Henry)

2007-01-01T23:59:59.000Z

231

Diffuser Augmented Wind Turbine Analysis Code  

E-Print Network [OSTI]

, it is necessary to develop innovative wind capturing devices that can produce energy in the locations where large conventional horizontal axis wind turbines (HAWTs) are too impractical to install and operate. A diffuser augmented wind turbine (DAWT) is one...

Carroll, Jonathan

2014-05-31T23:59:59.000Z

232

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network [OSTI]

3.2.1 Description of Test Wind Turbine . . . . . .Figure 1.2: Components of a modern wind turbine . . . . . .D.3: D.4: Wind turbine parameters . . . . . . . . . . . .

Prowell, I.

2011-01-01T23:59:59.000Z

233

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network [OSTI]

a steel 1-MW wind turbine tower. ” Engineering Structures,testing of a steel wind turbine tower. ” Proceedings of theanalysis of steel wind turbine towers in the canadian

Prowell, I.

2011-01-01T23:59:59.000Z

234

Offshore Code Comparison Collaboration, Continuation within IEA Wind Task 30: Phase II Results Regarding a Floating Semisubmersible Wind System: Preprint  

SciTech Connect (OSTI)

Offshore wind turbines are designed and analyzed using comprehensive simulation tools (or codes) that account for the coupled dynamics of the wind inflow, aerodynamics, elasticity, and controls of the turbine, along with the incident waves, sea current, hydrodynamics, and foundation dynamics of the support structure. This paper describes the latest findings of the code-to-code verification activities of the Offshore Code Comparison Collaboration, Continuation (OC4) project, which operates under the International Energy Agency (IEA) Wind Task 30. In the latest phase of the project, participants used an assortment of simulation codes to model the coupled dynamic response of a 5-MW wind turbine installed on a floating semisubmersible in 200 m of water. Code predictions were compared from load-case simulations selected to test different model features. The comparisons have resulted in a greater understanding of offshore floating wind turbine dynamics and modeling techniques, and better knowledge of the validity of various approximations. The lessons learned from this exercise have improved the participants? codes, thus improving the standard of offshore wind turbine modeling.

Robertson, A.; Jonkman, J.; Vorpahl, F.; Popko, W.; Qvist, J.; Froyd, L.; Chen, X.; Azcona, J.; Uzungoglu, E.; Guedes Soares, C.; Luan, C.; Yutong, H.; Pengcheng, F.; Yde, A.; Larsen, T.; Nichols, J.; Buils, R.; Lei, L.; Anders Nygard, T.; et al.

2014-03-01T23:59:59.000Z

235

5th International Meeting Wind Turbine Noise  

E-Print Network [OSTI]

1 5th International Meeting on Wind Turbine Noise Denver 28 ­ 30 August 2013 Wind Turbine Noise Broadband noise generated aerodynamically is the dominant noise source for a modern wind turbine(Brooks et turbines . First, a wall pressure spectral model proposed recently by Rozenberg, Robert and Moreau

Paris-Sud XI, Université de

236

Ris National Laboratory Satellite SAR applied in offshore wind  

E-Print Network [OSTI]

Risø National Laboratory Satellite SAR applied in offshore wind ressource mapping: possibilities is to quantify the regional offshore wind climate for wind energy application based on satellite SAR ·Study of 85SAR(m/s) Hasager, Dellwik, Nielsen and Furevik, 2004, Validation of ERS-2 SAR offshore wind-speed maps

237

ForPeerReview PUBLIC ACCEPTANCE OF OFFSHORE WIND POWER  

E-Print Network [OSTI]

ForPeerReview PUBLIC ACCEPTANCE OF OFFSHORE WIND POWER PROJECTS IN THE UNITED STATES Journal: Wind, Andrew; Minerals Management Service Keywords: offshore wind power, public opinion, social acceptancePeerReview 1 PUBLIC ACCEPTANCE OF OFFSHORE WIND POWER PROJECTS IN THE UNITED STATES Jeremy Firestone*, Willett

Firestone, Jeremy

238

Three Offshore Wind Advanced Technology Demonstration Projects...  

Office of Environmental Management (EM)

commercial operation by 2017. Dominion Power will install two 6-MW direct-drive wind turbines off the coast of Virginia Beach on twisted jacket foundations designed by Keystone...

239

Airfoils for wind turbine  

DOE Patents [OSTI]

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects. The airfoil in one embodiment is shaped and contoured to have a thickness in a range of about fourteen to seventeen percent, a Reynolds number in a range of about 1,500,000 to 2,000,000, and a maximum lift coefficient in a range of about 1.4 to 1.5. In another embodiment, the airfoil is shaped and contoured to have a thickness in a range of about fourteen percent to sixteen percent, a Reynolds number in a range of about 1,500,000 to 3,000,000, and a maximum lift coefficient in a range of about 0.7 to 1.5. Another embodiment of the airfoil is shaped and contoured to have a Reynolds in a range of about 1,500,000 to 4,000,000, and a maximum lift coefficient in a range of about 1.0 to 1.5.

Tangler, James L. (Boulder, CO); Somers, Dan M. (State College, PA)

2000-01-01T23:59:59.000Z

240

MEASURING IMPACTS TO BIRDS CAUSED BY WIND TURBINES MEASURING IMPACTS TO BIRDS CAUSED BY WIND TURBINES  

E-Print Network [OSTI]

APPENDIX A MEASURING IMPACTS TO BIRDS CAUSED BY WIND TURBINES #12;A-1 APPENDIX A MEASURING IMPACTS TO BIRDS CAUSED BY WIND TURBINES 1.0 INTRODUCTION Differential composition of wind turbines at wind energy used is the number of fatalities per wind turbine per year (Anderson et al. 1999). This metric has

Note: This page contains sample records for the topic "offshore wind turbines" 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

Offshore Coastal Wind Speed Gradients: issues for the design and development of large offshore windfarms  

E-Print Network [OSTI]

Offshore Coastal Wind Speed Gradients: issues for the design and development of large offshore@globalnet.co.uk · WEB SITE: www.multi-science.co.uk #12;Offshore Coastal Wind Speed Gradients: issues for the design and development of large offshore windfarms R.J. Barthelmie1,2, J. Badger3, S.C. Pryor2, C.B. Hasager3, M

Pryor, Sara C.

242

Wind Turbines Electrical and Mechanical Engineering  

E-Print Network [OSTI]

Wind Turbines Electrical and Mechanical Engineering Objective · Introduce students to the concept of alternative energy. · Explain the math and scientific principles behind engineering wind turbines. Standards and how it applies to wind energy · About how surface area and shape effects wind turbine efficiency

Provancher, William

243

A Fatigue Approach to Wind Turbine Control  

E-Print Network [OSTI]

A Fatigue Approach to Wind Turbine Control Keld Hammerum Kongens Lyngby 2006 #12;Technical to the turbulent nature of wind, the structural components of a wind turbine are exposed to highly varying loads. Therefore, fatigue damage is a major consideration when designing wind turbines. The control scheme applied

244

Sandia Wind Turbine Loads Database  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Sandia Wind Turbine Loads Database is divided into six files, each corresponding to approximately 16 years of simulation. The files are text files with data in columnar format. The 424MB zipped file containing six data files can be downloaded by the public. The files simulate 10-minute maximum loads for the NREL 5MW wind turbine. The details of the loads simulations can be found in the paper: “Decades of Wind Turbine Loads Simulations”, M. Barone, J. Paquette, B. Resor, and L. Manuel, AIAA2012-1288 (3.69MB PDF). Note that the site-average wind speed is 10 m/s (class I-B), not the 8.5 m/s reported in the paper.

245

FEED-IN TARIFFS AND OFFSHORE WIND POWER DEVELOPMENT  

E-Print Network [OSTI]

FEED-IN TARIFFS AND OFFSHORE WIND POWER DEVELOPMENT Prepared by Jon Lilley, Blaise Sheridan, Dawn........................................................................................................................ 28 #12; 3 Feed-in Tariffs and Offshore Wind Power Development Prepared Pursuant to DOE Grant Em

Firestone, Jeremy

246

Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm  

E-Print Network [OSTI]

Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2003 #12;Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2003 Published: 14 May 2004

247

Advanced Offshore Wind Tech: Accelerating New Opportunities for Clean Energy  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced the selection of three projects that aim to advance the offshore wind industry and lower the cost of offshore wind technologies. Learn more about these technological innovations.

248

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network [OSTI]

of Seismic and Wind Load Combinations 8.5.2 Extremeextrapolation for wind turbine extreme loads. ” Wind Energy,extrapolation for wind turbine extreme loads. ” 46th AIAA

Prowell, I.

2011-01-01T23:59:59.000Z

249

NREL Assesses National Design Standards for Offshore Wind (Fact Sheet)  

SciTech Connect (OSTI)

Report summarizes regulations, standards, and guidelines for the design and operation of offshore wind projects in the United States.

Not Available

2014-06-01T23:59:59.000Z

250

Offshore Wind Farm Layout Optimization (OWFLO) Project: Preliminary Results  

E-Print Network [OSTI]

Offshore Wind Farm Layout Optimization (OWFLO) Project: Preliminary Results Christopher N. Elkinton the layout of an offshore wind farm presents a significant engineering challenge. Most of the optimization literature to date has focused on land-based wind farms, rather than on offshore farms. Typically, energy

Massachusetts at Amherst, University of

251

Review report 2004 The Danish Offshore Wind Farm  

E-Print Network [OSTI]

- 1 - Review report 2004 The Danish Offshore Wind Farm Demonstration Project: Horns Rev and Nysted Offshore Wind Farms Environmental impact assessment and monitoring Prepared for The Environmental Group By Elsam Engineering and ENERGI E2 October 2005 #12;- 2 - Review Report 2004 The Danish Offshore Wind Farm

252

Hydroacoustic Monitoring of Fish Communities in Offshore Wind Farms  

E-Print Network [OSTI]

#12;Hydroacoustic Monitoring of Fish Communities in Offshore Wind Farms Annual Report 2004 Horns Rev Offshore Wind Farm Published: May 2005 Prepared by: Christian B. Hvidt Lars Brünner Frank Reier without clear reference to the source. #12;Hydroacoustic monitoring of fish communities in offshore wind

253

REVIEW Open Access Assessing environmental impacts of offshore wind  

E-Print Network [OSTI]

REVIEW Open Access Assessing environmental impacts of offshore wind farms: lessons learned and recommendations for the future Helen Bailey1* , Kate L Brookes2 and Paul M Thompson3 Abstract Offshore wind power literature and our experience with assessing impacts of offshore wind developments on marine mammals

Aberdeen, University of

254

Electric power from offshore wind via synoptic-scale interconnection  

E-Print Network [OSTI]

Electric power from offshore wind via synoptic-scale interconnection Willett Kemptona,1 , Felipe M regional estimate, Kempton et al. (2) calculated that two-thirds of the offshore wind power off the U in the U.S. Atlantic region is already underway. Fig. 1 shows as black squares offshore wind developments

Firestone, Jeremy

255

Vertical axis wind turbine airfoil  

DOE Patents [OSTI]

A vertical axis wind turbine airfoil is described. The wind turbine airfoil can include a leading edge, a trailing edge, an upper curved surface, a lower curved surface, and a centerline running between the upper surface and the lower surface and from the leading edge to the trailing edge. The airfoil can be configured so that the distance between the centerline and the upper surface is the same as the distance between the centerline and the lower surface at all points along the length of the airfoil. A plurality of such airfoils can be included in a vertical axis wind turbine. These airfoils can be vertically disposed and can rotate about a vertical axis.

Krivcov, Vladimir; Krivospitski, Vladimir; Maksimov, Vasili; Halstead, Richard; Grahov, Jurij Vasiljevich

2012-12-18T23:59:59.000Z

256

Building the Basic PVC Wind Turbine  

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

Energy Smart CD- Building PVC Turbine 8 Some Blade Building Tips KidWind model wind turbines are designed for use in science classes, or as a hobby or science fair project....

257

Offshore Code Comparison Collaboration, Continuation: Phase II Results of a Floating Semisubmersible Wind System: Preprint  

SciTech Connect (OSTI)

Offshore wind turbines are designed and analyzed using comprehensive simulation tools that account for the coupled dynamics of the wind inflow, aerodynamics, elasticity, and controls of the turbine, along with the incident waves, sea current, hydrodynamics, and foundation dynamics of the support structure. The Offshore Code Comparison Collaboration (OC3), which operated under the International Energy Agency (IEA) Wind Task 23, was established to verify the accuracy of these simulation tools [1]. This work was then extended under the Offshore Code Comparison Collaboration, Continuation (OC4) project under IEA Wind Task 30 [2]. Both of these projects sought to verify the accuracy of offshore wind turbine dynamics simulation tools (or codes) through code-to-code comparison of simulated responses of various offshore structures. This paper describes the latest findings from Phase II of the OC4 project, which involved the analysis of a 5-MW turbine supported by a floating semisubmersible. Twenty-two different organizations from 11 different countries submitted results using 24 different simulation tools. The variety of organizations contributing to the project brought together expertise from both the offshore structure and wind energy communities. Twenty-one different load cases were examined, encompassing varying levels of model complexity and a variety of metocean conditions. Differences in the results demonstrate the importance and accuracy of the various modeling approaches used. Significant findings include the importance of mooring dynamics to the mooring loads, the role nonlinear hydrodynamic terms play in calculating drift forces for the platform motions, and the difference between global (at the platform level) and local (at the member level) modeling of viscous drag. The results from this project will help guide development and improvement efforts for these tools to ensure that they are providing the accurate information needed to support the design and analysis needs of the offshore wind community.

Robertson, A.; Jonkman, J.; Musial, W.; Vorpahl, F.; Popko, W.

2013-11-01T23:59:59.000Z

258

Offshore Wind Jobs and Economic Development Impacts in the United...  

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

wind has tremendous potential in the United States as a clean, renewable source of electricity. This report uses the offshore wind Jobs and Economic Development Impacts (JEDI)...

259

Obama Administration Hosts Great Lakes Offshore Wind Workshop...  

Office of Environmental Management (EM)

wind development in the Great Lakes closer to fruition." "The country's vast offshore wind resources have the potential to dramatically reduce America's dependence on fossil...

260

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

Note: This page contains sample records for the topic "offshore wind turbines" 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

Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm  

E-Print Network [OSTI]

protection and at the wind turbine towers at six turbine sites. Video recordings were planned at different of the scour protection close to the turbine tower. Samples of fouling communities were collected at six turbine sites at the Horns Rev Wind Farm by SCUBA divers. The co-ordinates of the six turbine positions

262

Prototype bucket foundation for wind turbines  

E-Print Network [OSTI]

Prototype bucket foundation for wind turbines -natural frequency estimation Lars Bo Ibsen Morten bucket foundation for wind turbines -natural frequency estimation by Lars Bo Ibsen Morten Liingaard foundation for wind turbines--natural frequency estimation" is divided into four numbered sections

263

axis wind turbine: Topics by E-print Network  

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

to note that these views Firestone, Jeremy 65 WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE Renewable Energy Websites Summary: 1 WIND TURBINE...

264

Operational Impacts of Large Deployments of Offshore Wind (Poster)  

SciTech Connect (OSTI)

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

265

Analytical Modelling of Wind Speed Deficit in Large Offshore Wind Farms  

E-Print Network [OSTI]

Analytical Modelling of Wind Speed Deficit in Large Offshore Wind Farms Sten Frandsen*, Rebecca areas.As is often the need for offshore wind farms, the model handles a regular array geometry for offshore wind farms, the model handles a priori a regular array geometry with straight rows of wind

Pryor, Sara C.

266

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network [OSTI]

studied were vertical axis wind turbines, which are nottesting of vertical axis wind turbines (VAWT). For example,vertical axis turbines (VAWTs). Gradually, as the industry matured, most design concepts standardized on horizontal axis wind turbines (

Prowell, I.

2011-01-01T23:59:59.000Z

267

Coupled Dynamic Modeling of Floating Wind Turbine Systems: Preprint  

SciTech Connect (OSTI)

This article presents a collaborative research program that the Massachusetts Institute of Technology (MIT) and the National Renewable Energy Laboratory (NREL) have undertaken to develop innovative and cost-effective floating and mooring systems for offshore wind turbines in water depths of 10-200 m. Methods for the coupled structural, hydrodynamic, and aerodynamic analysis of floating wind turbine systems are presented in the frequency domain. This analysis was conducted by coupling the aerodynamics and structural dynamics code FAST [4] developed at NREL with the wave load and response simulation code WAMIT (Wave Analysis at MIT) [15] developed at MIT. Analysis tools were developed to consider coupled interactions between the wind turbine and the floating system. These include the gyroscopic loads of the wind turbine rotor on the tower and floater, the aerodynamic damping introduced by the wind turbine rotor, the hydrodynamic damping introduced by wave-body interactions, and the hydrodynamic forces caused by wave excitation. Analyses were conducted for two floater concepts coupled with the NREL 5-MW Offshore Baseline wind turbine in water depths of 10-200 m: the MIT/NREL Shallow Drafted Barge (SDB) and the MIT/NREL Tension Leg Platform (TLP). These concepts were chosen to represent two different methods of achieving stability to identify differences in performance and cost of the different stability methods. The static and dynamic analyses of these structures evaluate the systems' responses to wave excitation at a range of frequencies, the systems' natural frequencies, and the standard deviations of the systems' motions in each degree of freedom in various wind and wave environments. This article in various wind and wave environments. This article explores the effects of coupling the wind turbine with the floating platform, the effects of water depth, and the effects of wind speed on the systems' performance. An economic feasibility analysis of the two concepts was also performed. Key cost components included the material and construction costs of the buoy; material and installation costs of the tethers, mooring lines, and anchor technologies; costs of transporting and installing the system at the chosen site; and the cost of mounting the wind turbine to the platform. The two systems were evaluated based on their static and dynamic performance and the total system installed cost. Both systems demonstrated acceptable motions, and have estimated costs of $1.4-$1.8 million, not including the cost of the wind turbine, the power electronics, or the electrical transmission.

Wayman, E. N.; Sclavounos, P. D.; Butterfield, S.; Jonkman, J.; Musial, W.

2006-03-01T23:59:59.000Z

268

Improvement of Offshore Wind Resource Modeling in the Mid-  

E-Print Network [OSTI]

Improvement of Offshore Wind Resource Modeling in the Mid- Atlantic Bight Wind Energy Symposium Sienkiewicz , Chris Hughes 26 February 2013 #12;Improving Atmospheric Models for Offshore Wind Resource Interaction Tower ­ 23 m NOAA Buzzard's Bay Tower ­ 25 m Cape Wind Tower (60 m from 2003-2011; just platform

Firestone, Jeremy

269

Advanced Signal Processing Techniques for Fault Detection and Diagnosis in a Wind Turbine  

E-Print Network [OSTI]

rotor bars and bearing damages. Index Terms--Wind turbines, motor current signature analy- sis, time factors, such as wind speed and acoustic noise, wind parks are being mainly constructed offshore. Studies. Different methods of fault detection exist. These include monitoring of the acoustic vibration, internal

Paris-Sud XI, Université de

270

OFFSHORE WIND FARM LAYOUT OPTIMIZATION (OWFLO) PROJECT: AN INTRODUCTION  

E-Print Network [OSTI]

OFFSHORE WIND FARM LAYOUT OPTIMIZATION (OWFLO) PROJECT: AN INTRODUCTION C. N. Elkinton* , J. F Governors Dr., Amherst, MA 01003, USA * celkinto@ecs.umass.edu ABSTRACT Optimizing the layout of an offshore focused on land-based wind farms, rather than on offshore farms. The conventional method used to lay out

Massachusetts at Amherst, University of

271

Offshore wind profile measurements from remote sensing instruments  

E-Print Network [OSTI]

Offshore wind profile measurements from remote sensing instruments Ioannis Antoniou (1) , Hans E) have been mounted on top of a transformer platform situated offshore close to the Nysted wind farm be used to supplement met mast measurements for offshore applications. #12;1. Introduction Exploiting

272

New Research Facility to Remove Hurdles to Offshore Wind and...  

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

Wildlife-Interaction Monitoring for Offshore Wind Farms - Technology Hybrids Show Best Potential Wind Program R&D Newsletter To subscribe to Wind Program R&D Newsletter, submit...

273

Wind Turbine Blockset in Matlab/Simulink  

E-Print Network [OSTI]

Wind Turbine Blockset in Matlab/Simulink General Overview and Description of the Models Florin Iov, Anca Daniela Hansen, Poul Sørensen, Frede Blaabjerg Aalborg University March 2004 #12;22 Wind Turbine turbine applications. This toolbox has been developed during the research project "Simulation Platform

274

Computational Analysis of Shrouded Wind Turbine Configurations  

E-Print Network [OSTI]

Computational Analysis of Shrouded Wind Turbine Configurations Aniket C. Aranake Vinod K. Lakshminarayan Karthik Duraisamy Computational analysis of diuser-augmented turbines is performed using high-dimensional simulations of shrouded wind turbines are performed for selected shroud geometries. The results are compared

Alonso, Juan J.

275

Fast Wind Turbine Design via Geometric Programming  

E-Print Network [OSTI]

Fast Wind Turbine Design via Geometric Programming Warren Hoburg and Pieter Abbeel UC Berkeley turbine aerodynamics have an underlying convex mathematical structure that these new methods can exploit the application of GP to large wind turbine design problems a promising approach. Nomenclature (·)a, (·)t axial

Abbeel, Pieter

276

Articles about Offshore Wind | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataCombinedDepartment2015Services »of(BENEFIT) -ArchivedGridOffshore Wind

277

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND FARM SITES  

E-Print Network [OSTI]

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND for conditions important for offshore wind energy utilisation are compared and tested: Four models tested with data from the offshore field measurement Rødsand by extrapolating the measured 10 m wind

Heinemann, Detlev

278

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND FARM SITES  

E-Print Network [OSTI]

MODELLING THE VERTICAL WIND SPEED AND TURBULENCE INTENSITY PROFILES AT PROSPECTIVE OFFSHORE WIND important for offshore wind energy utilisation are discussed and tested: Four models for the surface tested with data from the offshore field measurement Rødsand by extrapolating the measured 10 m wind

Heinemann, Detlev

279

On the Fatigue Analysis of Wind Turbines  

SciTech Connect (OSTI)

Modern wind turbines are fatigue critical machines that are typically used to produce electrical power from the wind. Operational experiences with these large rotating machines indicated that their components (primarily blades and blade joints) were failing at unexpectedly high rates, which led the wind turbine community to develop fatigue analysis capabilities for wind turbines. Our ability to analyze the fatigue behavior of wind turbine components has matured to the point that the prediction of service lifetime is becoming an essential part of the design process. In this review paper, I summarize the technology and describe the ''best practices'' for the fatigue analysis of a wind turbine component. The paper focuses on U.S. technology, but cites European references that provide important insights into the fatigue analysis of wind turbines.

Sutherland, Herbert J.

1999-06-01T23:59:59.000Z

280

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

SciTech Connect (OSTI)

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

Huskey, A.

2011-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Wind Turbine Manufacturing Process Monitoring  

SciTech Connect (OSTI)

To develop a practical inline inspection that could be used in combination with automated composite material placement equipment to economically manufacture high performance and reliable carbon composite wind turbine blade spar caps. The approach technical feasibility and cost benefit will be assessed to provide a solid basis for further development and implementation in the wind turbine industry. The program is focused on the following technology development: (1) Develop in-line monitoring methods, using optical metrology and ultrasound inspection, and perform a demonstration in the lab. This includes development of the approach and performing appropriate demonstration in the lab; (2) Develop methods to predict composite strength reduction due to defects; and (3) Develop process models to predict defects from leading indicators found in the uncured composites.

Waseem Faidi; Chris Nafis; Shatil Sinha; Chandra Yerramalli; Anthony Waas; Suresh Advani; John Gangloff; Pavel Simacek

2012-04-26T23:59:59.000Z

282

Improved Offshore Wind Resource Assessment in Global Climate Stabilization Scenarios  

SciTech Connect (OSTI)

This paper introduces a technique for digesting geospatial wind-speed data into areally defined -- country-level, in this case -- wind resource supply curves. We combined gridded wind-vector data for ocean areas with bathymetry maps, country exclusive economic zones, wind turbine power curves, and other datasets and relevant parameters to build supply curves that estimate a country's offshore wind resource defined by resource quality, depth, and distance-from-shore. We include a single set of supply curves -- for a particular assumption set -- and study some implications of including it in a global energy model. We also discuss the importance of downscaling gridded wind vector data to capturing the full resource potential, especially over land areas with complex terrain. This paper includes motivation and background for a statistical downscaling methodology to account for terrain effects with a low computational burden. Finally, we use this forum to sketch a framework for building synthetic electric networks to estimate transmission accessibility of renewable resource sites in remote areas.

Arent, D.; Sullivan, P.; Heimiller, D.; Lopez, A.; Eurek, K.; Badger, J.; Jorgensen, H. E.; Kelly, M.; Clarke, L.; Luckow, P.

2012-10-01T23:59:59.000Z

283

Performance of propeller wind turbines  

SciTech Connect (OSTI)

Presented herein is a parametric study of the performance of propeller wind turbines with realistic drag/lift ratios. Calculations were made using the complete Glauert vortex blade element theory in annular streamtube elements with the complete turbine performance being the sum of the elemental results up to a specified tip speed ratio. The objective here is to exhibit a new computational technique which yields performance directly when tangential speed ratio and section aerodynamic characteristics are specified. It was found that for a tip speed ratio of 4, turbines with drag/lift ratios of 0.00 and 0.01 had power coefficients of 0.575 and 0.55, respectively. The off-design performance of the finite drag/lift was far better than that of their zero drag counterparts, except in a + or - 20% region about the design conditions. Tolerance to off-design operation increased with decreasing tip speed ratios so that the annual energy capture for tip speed ratios between 2 and 4 was about 87% of the ideal turbine value. The results are intended to provide a basis for re-evaluation of the power range classes of fixed pitch turbines and design tip speed ratios.

Wortman, A.

1983-11-01T23:59:59.000Z

284

International Collaboration on Offshore Wind Energy Under IEA Annex XXIII  

SciTech Connect (OSTI)

This paper defines the purpose of IEA Annex XXIII, the International Collaboration on Offshore Wind Energy. This international collaboration through the International Energy Agency (IEA) is an efficient forum from which to advance the technical and environmental experiences collected from existing offshore wind energy projects, as well as the research necessary to advance future technology for deep-water wind energy technology.

Musial, W.; Butterfield, S.; Lemming, J.

2005-11-01T23:59:59.000Z

285

Offshore Wind Power Experiences, Potential and Key Issues for  

E-Print Network [OSTI]

Offshore Wind Power Experiences, Potential and Key Issues for Deployment Jørgen Lemming, Poul Erik-Erik Clausen Title: Offshore Wind Power Experiences, Potential and Key Issues for Deployment Division: VEA, SYS Risø-R-1673(EN) January 2008 Abstract: Wind power has been growing at spectacular rates. Today

286

Offshore Code Comparison Collaboration (OC3) for IEA Wind Task 23 Offshore Wind Technology and Deployment  

SciTech Connect (OSTI)

This final report for IEA Wind Task 23, Offshore Wind Energy Technology and Deployment, is made up of two separate reports, Subtask 1: Experience with Critical Deployment Issues and Subtask 2: Offshore Code Comparison Collaborative (OC3). Subtask 1 discusses ecological issues and regulation, electrical system integration, external conditions, and key conclusions for Subtask 1. Subtask 2 included here, is the larger of the two volumes and contains five chapters that cover background information and objectives of Subtask 2 and results from each of the four phases of the project.

Jonkman, J.; Musial, W.

2010-12-01T23:59:59.000Z

287

Dynamic response analysis of a 900 kW wind turbine subject to ground excitation  

E-Print Network [OSTI]

powered by wind energy, wind turbines themselves stillWind Energy and Earthquake Activity Wind Turbines areTurbines. Det Norsk Veritas, Copen- hagen and Wind Energy

Caudillo, Adrian Felix

2012-01-01T23:59:59.000Z

288

Horns Rev Offshore Wind Farm Environmental Impact Assessment  

E-Print Network [OSTI]

Horns Rev Offshore Wind Farm Environmental Impact Assessment of Sea Bottom and Marine Biology #12 Design ApS 01.03.2000 #12;Bio/consult A/S Horns Rev. Offshore Wind Farm Doc. No. 1680-1-02-03-003 rev. 1........................................................................................................................................................... 36 #12;Bio/consult A/S ELSAM Horns Rev. Offshore Wind Farm Doc. No. 1680-1-02-03-003 rev. 1 Page 4

289

Small Wind Research Turbine: Final Report  

SciTech Connect (OSTI)

The Small Wind Research Turbine (SWRT) project was initiated to provide reliable test data for model validation of furling wind turbines and to help understand small wind turbine loads. This report will familiarize the user with the scope of the SWRT test and support the use of these data. In addition to describing all the testing details and results, the report presents an analysis of the test data and compares the SWRT test data to simulation results from the FAST aeroelastic simulation model.

Corbus, D.; Meadors, M.

2005-10-01T23:59:59.000Z

290

Electrical transmission systems for large offshore wind farms.  

E-Print Network [OSTI]

??Simulations of switching transients were carried out in EMTP-RV. Overvoltages in offshore wind farms ranged from temporary over voltages to very fast front transients. Transient… (more)

King, Rosemary Louise

2011-01-01T23:59:59.000Z

291

PNNL Reviews Wildlife-Interaction Monitoring for Offshore Wind...  

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

monitoring birds, bats, and aquatic animals such as marine mammals, sea turtles, and fish in the offshore wind farm environment. Informed by monitoring results and research...

292

Assessment of Ports for Offshore Wind Development in the United...  

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

America, Inc. Page ii Document No. 700694-USPO-R-03 Assessment of Ports for Offshore Wind Development in the United States Issue: E Final CONTENTS EXECUTIVE SUMMARY...

293

New Model Demonstrates Offshore Wind Industry's Job Growth Potential...  

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

has developed a tool to estimate jobs and other economic impacts associated with offshore wind development in the United States. The modeling tool, which illustrates the potential...

294

Offshore Wind Jobs and Economic Development Impacts in the United...  

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

Energy Laboratory (NREL) at www.nrel.govpublications. Executive Summary Offshore wind has tremendous potential in the United States as a clean, renewable source of...

295

New Report Highlights Trends in Offshore Wind with 14 Projects...  

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

the advanced stages of development- together representing nearly 4,900 megawatts (MW) of potential offshore wind energy capacity for the United States. Further, this year's report...

296

DOE Announces Webinars on Economic Impacts of Offshore Wind,...  

Energy Savers [EERE]

systems cost. Suzanne Tegen, National Renewable Energy Laboratory (NREL): Offshore Wind Jobs and Economic Development Impact: Four Regional Scenarios. This presentation...

297

Improving Wind Turbine Gearbox Reliability: Preprint  

SciTech Connect (OSTI)

This paper describes a new research and development initiative to improve gearbox reliability in wind turbines begun at the National Renewable Energy Laboratory (NREL) in Golden, Colorado, USA.

Musial, W.; Butterfield, S.; McNiff, B.

2007-06-01T23:59:59.000Z

298

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

SciTech Connect (OSTI)

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

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

2012-11-01T23:59:59.000Z

299

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

SciTech Connect (OSTI)

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

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

2012-11-01T23:59:59.000Z

300

Impacts of Wind Turbine Proximity on Property Values in Massachusetts  

E-Print Network [OSTI]

of Industrial Wind Turbine Noise on Sleep and Health.Waye, K. P. (2007) Wind Turbine Noise, Annoyance and Self-and Annoyance of Wind Turbine Noise. Acta Acus- tica United

Atkinson-Palombo, Carol

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Sandia National Laboratories: New Wind Turbine Blade Design  

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

ClimateECEnergyNew Wind Turbine Blade Design New Wind Turbine Blade Design More Energy with Less Weight ATLAS II Data Acquisition System New Wind Turbine Blade Design On May 18,...

302

An experimental and numerical study of wind turbine seismic behavior  

E-Print Network [OSTI]

Y. (1984). “Response of a wind turbine blade to seismic andM. (2006). “Swept wind turbine blade aeroelastic modelingto fatigue for wind turbine blades than earthquake loads. In

Prowell, I.

2011-01-01T23:59:59.000Z

303

Floating Offshore Wind Technology Generating Resources Advisory Committee  

E-Print Network [OSTI]

Floating Offshore Wind Technology Jeff King Generating Resources Advisory Committee May 28, 2014 1 resource Offshore technology Prototypes and projects Cost Proposed 7th Plan Treatment 2 #12;Why technology transfer from offshore oil & gas industry On-shore fabrication & assembly (assembled unit towed

304

Secretary Chu Unveils 41 New Offshore Wind Power R&D Projects...  

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

Unveils 41 New Offshore Wind Power R&D Projects Secretary Chu Unveils 41 New Offshore Wind Power R&D Projects September 8, 2011 - 11:13am Addthis Chris Hart Offshore Wind Team...

305

UNDERLYING MOTIVATIONS FOR DELAWARE PUBLIC PARTICIPATION IN SUPPORT OF OFFSHORE WIND  

E-Print Network [OSTI]

UNDERLYING MOTIVATIONS FOR DELAWARE PUBLIC PARTICIPATION IN SUPPORT OF OFFSHORE WIND: IMPLICATIONS PARTICIPATION IN SUPPORT OF OFFSHORE WIND: IMPLICATIONS FOR STATE ENERGY POLICY by Jacqueline D Piero Approved ................................................................................................. 3 Offshore wind: a new option in the United States.............................................. 4

Firestone, Jeremy

306

Offshore Wind Power USA | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergyDepartment of Energy(National1EnergyFederalaimsOffshore Wind Power

307

How Does a Wind Turbine Work?  

Broader source: Energy.gov [DOE]

Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to...

308

Washington University Can the Sound Generated by Modern Wind Turbines  

E-Print Network [OSTI]

Washington University Can the Sound Generated by Modern Wind Turbines Affect the Health of Those turbines haveWind turbines have been getting biggerbeen getting bigger and bigger....and bigger.... Lars Needs Wind turbines are "green" and areWind turbines are "green" and are contributing to our energy

Salt, Alec N.

309

Mixer-Ejector Wind Turbine: Breakthrough High Efficiency Shrouded Wind Turbine  

SciTech Connect (OSTI)

Broad Funding Opportunity Announcement Project: FloDesign Wind Turbine’s innovative wind turbine, inspired by the design of jet engines, could deliver 300% more power than existing wind turbines of the same rotor diameter by extracting more energy over a larger area. FloDesign Wind Turbine’s unique shrouded design expands the wind capture area, and the mixing vortex downstream allows more energy to flow through the rotor without stalling the turbine. The unique rotor and shrouded design also provide significant opportunity for mass production and simplified assembly, enabling mid-scale turbines (approximately 100 kW) to produce power at a cost that is comparable to larger-scale conventional turbines.

None

2010-02-22T23:59:59.000Z

310

Offshore wind project surges ahead in South Carolina | Department...  

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

wind project surges ahead in South Carolina Offshore wind project surges ahead in South Carolina October 12, 2010 - 10:00am Addthis Researchers pull buoys from waters off South...

311

Offshore Wind Project Surges Ahead in South Carolina | Department...  

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

Wind Project Surges Ahead in South Carolina Offshore Wind Project Surges Ahead in South Carolina October 13, 2010 - 11:21am Addthis Stephen Graff Former Writer & editor for Energy...

312

Coastal Ohio Wind Project for Reduced Barriers to Deployment of Offshore Wind Energy  

SciTech Connect (OSTI)

The Coastal Ohio Wind Project was created to establish the viability of wind turbines on the coastal and offshore regions of Northern Ohio. The project’s main goal was to improve operational unit strategies used for environmental impact assessment of offshore turbines on lake wildlife by optimizing and fusing data from the multi-instrument surveillance system and providing an engineering analysis of potential design/operational alternatives for offshore wind turbines. The project also developed a general economic model for offshore WTG deployment to quantify potential revenue losses due to wind turbine shutdown related to ice and avian issues. In a previous phase of this project (Award Number: DE-FG36-06GO86096), we developed a surveillance system that was used to collect different parameters such as passage rates, flight paths, flight directions, and flight altitudes of nocturnal migrating species, movements of birds and bats, and bird calls for assessing patterns and peak passage rates during migration. To derive such parameters we used thermal IR imaging cameras, acoustic recorders, and marine radar Furuno (XANK250), which was coupled with a XIR3000B digitizing card from Russell Technologies and open source radR processing software. The integration yielded a development of different computational techniques and methods, which we further developed and optimized as a combined surveillance system. To accomplish this task we implemented marine radar calibration, optimization of processing parameters, and fusion of the multi-sensor data in order to make inferences about the potential avian targets. The main goal of the data fusion from the multi-sensor environment was aimed at reduction of uncertainties while providing acceptable confidence levels with detailed information about the migration patterns. Another component comprised of an assessment of wind resources in a near lake environment and an investigation of the effectiveness of ice coating materials to mitigate adverse effects of ice formation on wind turbine structures. Firstly, a Zephir LiDAR system was acquired and installed at Woodlands School in Huron, Ohio, which is located near Lake Erie. Wind resource data were obtained at ten measurement heights, 200m, 150m, 100m, 80m, 60m, 40m, 38m, 30m, 20m, and 10m. The Woodlands School’s wind turbine anemometer also measured the wind speed at the hub height. These data were collected for approximately one year. The hub anemometer data correlated well with the LiDAR wind speed measurements at the same height. The data also showed that on several days different power levels were recorded by the turbine at the same wind speed as indicated by the hub anemometer. The corresponding LiDAR data showed that this difference can be attributed to variability in the wind over the turbine rotor swept area, which the hub anemometer could not detect. The observation suggests that single point hub wind velocity measurements are inadequate to accurately estimate the power generated by a turbine at all times since the hub wind speed is not a good indicator of the wind speed over the turbine rotor swept area when winds are changing rapidly. To assess the effectiveness of ice coatings to mitigate the impact of ice on turbine structures, a closed-loop icing research tunnel (IRT) was designed and constructed. By controlling the temperature, air speed, water content and liquid droplet size, the tunnel enabled consistent and repeatable ice accretion under a variety of conditions with temperatures between approximately 0°C and -20°C and wind speeds up to 40 miles per hour in the tunnel’s test section. The tunnel’s cooling unit maintained the tunnel temperature within ±0.2°C. The coatings evaluated in the study were Boyd Coatings Research Company’s CRC6040R3, MicroPhase Coatings Inc.’s PhaseBreak TP, ESL and Flex coatings. Similar overall performance was observed in all coatings tested in that water droplets form on the test articles beginning at the stagnation region and spreading in the downstream direction in time. When compari

Gorsevski, Peter; Afjeh, Abdollah; Jamali, Mohsin; Carroll, Michael

2014-04-09T23:59:59.000Z

313

Theoretical Developments and Practical Aspects of Dynamic Systems in Wind Energy Applications  

E-Print Network [OSTI]

for offshore wind technology, however, are significant obstacles that need to be overcome to make offshore wind a viable option. Vertical-axis wind turbines (VAWTs) are potentially ideal candidates for large offshore wind energy applications, and may...

Owens, Brian C

2013-11-07T23:59:59.000Z

314

Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual...  

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

in Wind Turbine Towers: Cost Analysis and Conceptual Design Hydrogen Storage in Wind Turbine Towers: Cost Analysis and Conceptual Design Preprint 34851.pdf More Documents &...

315

EA-2004: Seneca Nation of Indians Wind Turbine Project, Cattaraugus...  

Energy Savers [EERE]

EA-2004: Seneca Nation of Indians Wind Turbine Project, Cattaraugus Territory, New York EA-2004: Seneca Nation of Indians Wind Turbine Project, Cattaraugus Territory, New York...

316

GE, Sandia National Lab Improve Wind Turbines | GE Global Research  

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

GE, Sandia National Lab Discover Pathway to Quieter, More Productive Wind Turbines GE, Sandia National Lab Discover Pathway to Quieter, More Productive Wind Turbines Use of...

317

Wind Turbine Interactions with Birds, Bats, and their Habitats...  

Energy Savers [EERE]

Wind Turbine Interactions with Birds, Bats, and their Habitats: A Summary of Research Results and Priority Questions Wind Turbine Interactions with Birds, Bats, and their Habitats:...

318

Use of SCADA Data for Failure Detection in Wind Turbines  

SciTech Connect (OSTI)

This paper discusses the use of existing wind turbine SCADA data for development of fault detection and diagnostic techniques for wind turbines.

Kim, K.; Parthasarathy, G.; Uluyol, O.; Foslien, W.; Sheng, S.; Fleming, P.

2011-10-01T23:59:59.000Z

319

Argonne Researchers Shine "Light" on Origins of Wind Turbine...  

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

Argonne Researchers Shine "Light" on Origins of Wind Turbine Bearing Failures Argonne Researchers Shine "Light" on Origins of Wind Turbine Bearing Failures September 12, 2014 -...

320

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

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

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

Note: This page contains sample records for the topic "offshore wind turbines" 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

EA-2004: Seneca Nation of Indians Wind Turbine Project, Cattaraugus...  

Office of Environmental Management (EM)

of Indians Wind Turbine Project, Cattaraugus Territory, Chautauqua County, Irving, New York EA-2004: Seneca Nation of Indians Wind Turbine Project, Cattaraugus Territory,...

322

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

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

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

323

Aerodynamic interference between two Darrieus wind turbines  

SciTech Connect (OSTI)

The effect of aerodynamic interference on the performance of two curved bladed Darrieus-type vertical axis wind turbines has been calculated using a vortex/lifting line aerodynamic model. The turbines have a tower-to-tower separation distance of 1.5 turbine diameters, with the line of turbine centers varying with respect to the ambient wind direction. The effects of freestream turbulence were neglected. For the cases examined, the calculations showed that the downwind turbine power decrement (1) was significant only when the line of turbine centers was coincident with the ambient wind direction, (2) increased with increasing tipspeed ratio, and (3) is due more to induced flow angularities downstream than to speed deficits near the downstream turbine.

Schatzle, P.R.; Klimas, P.C.; Spahr, H.R.

1981-04-01T23:59:59.000Z

324

FOUR ESSAYS ON OFFSHORE WIND POWER POTENTIAL, DEVELOPMENT, REGULATORY FRAMEWORK, AND INTEGRATION  

E-Print Network [OSTI]

FOUR ESSAYS ON OFFSHORE WIND POWER POTENTIAL, DEVELOPMENT, REGULATORY FRAMEWORK, AND INTEGRATION 2010 Amardeep Dhanju All Rights Reserved #12;FOUR ESSAYS ON OFFSHORE WIND POWER POTENTIAL, DEVELOPMENT

Firestone, Jeremy

325

Transient Studies in Large Offshore Wind Farms, Taking Into Account Network Breaker Interaction  

E-Print Network [OSTI]

Transient Studies in Large Offshore Wind Farms, Taking Into Account Network Breaker Interaction studies in offshore wind farms, PSCAD. I. INTRODUCTION IN OWF applications, the consequences of component

Bak, Claus Leth

326

Low Wind Speed Turbine Developments in Convoloid Gearing: Final Technical Report, June 2005 - October 2008  

SciTech Connect (OSTI)

This report presents the results of a study conducted by Genesis Partners LP as part of the United States Department of Energy Wind Energy Research Program to develop wind technology that will enable wind systems to compete in regions having low wind speeds. The purpose of the program is to reduce the cost of electricity from large wind systems in areas having Class 4 winds to 3 cents per kWh for onshore systems or 5 cents per kWh for offshore systems. This work builds upon previous activities under the WindPACT project, the Next Generation Turbine project, and Phase I of the Low Wind Speed Turbine (LWST) project. This project is concerned with the development of more cost-effective gearing for speed increasers for wind turbines.

Genesis Partners LP

2010-08-01T23:59:59.000Z

327

Lightning protection system for a wind turbine  

DOE Patents [OSTI]

In a wind turbine (104, 500, 704) having a plurality of blades (132, 404, 516, 744) and a blade rotor hub (120, 712), a lightning protection system (100, 504, 700) for conducting lightning strikes to any one of the blades and the region surrounding the blade hub along a path around the blade hub and critical components of the wind turbine, such as the generator (112, 716), gearbox (708) and main turbine bearings (176, 724).

Costin, Daniel P. (Chelsea, VT); Petter, Jeffrey K. (Williston, VT)

2008-05-27T23:59:59.000Z

328

the risk issue of wind measurement for wind turbine operation  

E-Print Network [OSTI]

Sciences, National Taiwan University #12;outline · Wind measurement in meteorology and wind farm design-related issues on wind turbine operation 3/31/2011 2 #12;WIND MEASUREMENT IN METEOROLOGY & WIND FARM DESIGN 3.brainybetty.com 11 wind farm at ChangHwa Coastal Industrial Park 70m wind tower 70m 50m 30m 10m #12;1 2 3 4 5 1 (70M

Leu, Tzong-Shyng "Jeremy"

329

Responses of floating wind turbines to wind and wave excitation  

E-Print Network [OSTI]

The use of wind power has recently emerged as a promising alternative to conventional electricity generation. However, space requirements and public pressure to place unsightly wind turbines out of visual range make it ...

Lee, Kwang Hyun

2005-01-01T23:59:59.000Z

330

RELIABILITY BASED DESIGN OF FIXED FOUNDATION WIND TURBINES  

SciTech Connect (OSTI)

Recent analysis of offshore wind turbine foundations using both applicable API and IEC standards show that the total load demand from wind and waves is greatest in wave driven storms. Further, analysis of overturning moment loads (OTM) reveal that impact forces exerted by breaking waves are the largest contributor to OTM in big storms at wind speeds above the operating range of 25 m/s. Currently, no codes or standards for offshore wind power generators have been adopted by the Bureau of Ocean Energy Management Regulation and Enforcement (BOEMRE) for use on the Outer Continental Shelf (OCS). Current design methods based on allowable stress design (ASD) incorporate the uncertainty in the variation of loads transferred to the foundation and geotechnical capacity of the soil and rock to support the loads is incorporated into a factor of safety. Sources of uncertainty include spatial and temporal variation of engineering properties, reliability of property measurements applicability and sufficiency of sampling and testing methods, modeling errors, and variability of estimated load predictions. In ASD these sources of variability are generally given qualitative rather than quantitative consideration. The IEC 61400‐3 design standard for offshore wind turbines is based on ASD methods. Load and resistance factor design (LRFD) methods are being increasingly used in the design of structures. Uncertainties such as those listed above can be included quantitatively into the LRFD process. In LRFD load factors and resistance factors are statistically based. This type of analysis recognizes that there is always some probability of failure and enables the probability of failure to be quantified. This paper presents an integrated approach consisting of field observations and numerical simulation to establish the distribution of loads from breaking waves to support the LRFD of fixed offshore foundations.

Nichols, R.

2013-10-14T23:59:59.000Z

331

A Stochastic DEVS Wind Turbine Component Model for Wind Farm Simulation  

E-Print Network [OSTI]

A Stochastic DEVS Wind Turbine Component Model for Wind Farm Simulation Eduardo P´erez, Lewis, wind turbine, DEVS, STDEVS Abstract Wind farms use several wind turbines to generate electricity variations in wind speed and direction, wind turbines experience stochastic loading that of- ten lead

Ding, Yu

332

Variable Frequency Operations of an Offshore Wind Power Plant with HVDC-VSC: Preprint  

SciTech Connect (OSTI)

In this paper, a constant Volt/Hz operation applied to the Type 1 wind turbine generator. Various control aspects of Type 1 generators at the plant level and at the turbine level will be investigated. Based on DOE study, wind power generation may reach 330 GW by 2030 at the level of penetration of 20% of the total energy production. From this amount of wind power, 54 GW of wind power will be generated at offshore wind power plants. The deployment of offshore wind power plants requires power transmission from the plant to the load center inland. Since this power transmission requires submarine cable, there is a need to use High-Voltage Direct Current (HVDC) transmission. Otherwise, if the power is transmitted via alternating current, the reactive power generated by the cable capacitance may cause an excessive over voltage in the middle of the transmission distance which requires unnecessary oversized cable voltage breakdown capability. The use of HVDC is usually required for transmission distance longer than 50 kilometers of submarine cables to be economical. The use of HVDC brings another advantage; it is capable of operating at variable frequency. The inland substation will be operated to 60 Hz synched with the grid, the offshore substation can be operated at variable frequency, thus allowing the wind power plant to be operated at constant Volt/Hz. In this paper, a constant Volt/Hz operation applied to the Type 1 wind turbine generator. Various control aspects of Type 1 generators at the plant level and at the turbine level will be investigated.

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

2011-12-01T23:59:59.000Z

333

Wind Turbine Towers Establish New Height Standards and Reduce...  

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

Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Wind Turbine Towers Establish New Height Standards and Reduce Cost of Wind Energy Case study that...

334

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"

335

Subject no.: 1.4 – Policies and Programmes LIFE CYCLE ASSESSMENT FOR WIND TURBINES  

E-Print Network [OSTI]

ABSTRACT: Tech-wise A/S has conducted a life cycle assessment of a 2 MW offshore wind turbine. A life cycle assessment (LCA), also known as a cradle to grave analysis, is an inventory of all environmental impact of a product, process or service within its complete lifecycle. An LCA includes a recovery of the resources used in the production through the utilisation to the dismantling and disposal of the product. As sample wind turbine a 2 MW offshore wind turbine placed at Horns Rev in the North Sea has been used, since this project is under development and Tech-wise A/S is the main consultant to this project. In this LCA assumptions have been made where there is information about certain materials. The assessment revealed- as expected- that the environmental impact is concentrated in the production and disposal phase. Mainly the use of normal and high-strength steel are contributors. This means that the main impact is found to come from the nacelle and the foundation. Keywords: Environmental Aspects, Off-shore, Materials, Life Cycle Assessment, EDIP-method The results of this LCA will be used to identify the most essential environmental impact in all life phases of a 2 MW offshore wind turbine. This project is the first step in an examination of the possible improvement of the environmental performance of that particular wind turbine and was finalised in spring 2001. The plan is to finalise the next project by the end of 2001.

Henriette Hassing; Søren Varming

2001-01-01T23:59:59.000Z

336

Ben Ticha M. B., Ranchin T., Wald L., Using several data sources for offshore wind resource assessment, 2005, Copenhagen Offshore Wind conference 2005  

E-Print Network [OSTI]

Ben Ticha M. B., Ranchin T., Wald L., Using several data sources for offshore wind resource assessment, 2005, Copenhagen Offshore Wind conference 2005 1 Using several data sources for offshore wind of production. Nowadays, the resource is evaluated by interpolation of discrete measurements but offshore

Boyer, Edmond

337

Hurricane wind fields needed to assess risk to offshore wind farms  

E-Print Network [OSTI]

LETTER Hurricane wind fields needed to assess risk to offshore wind farms In their paper in PNAS losses attributable to hurricane activity at four hypothetical offshore wind farm sites. We found one a 20-y typical wind farm lifetime. They combined a county annual landfall frequency probability density

Jaramillo, Paulina

338

Meteorological aspects of siting large wind turbines  

SciTech Connect (OSTI)

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

339

Structural responses and power output of a wind turbine are strongly affected by the wind field acting on the wind turbine. Knowledge about the wind field and its  

E-Print Network [OSTI]

ABSTRACT Structural responses and power output of a wind turbine are strongly affected by the wind field acting on the wind turbine. Knowledge about the wind field and its variations is essential not only for designing, but also for cost-efficiently managing wind turbines. Wind field monitoring

Stanford University

340

Influence of refraction on wind turbine noise  

E-Print Network [OSTI]

A semi-empirical method is applied to calculate the time-average sound level of wind turbine noise generation and propagation. Both are affected by wind shear refraction. Under upwind conditions the partially ensonified zone separates the fully ensonified zone (close to the turbine) and the shadow zone (far away from the turbine). Refraction is described in terms of the wind speed linear profile fitted to the power law profile. The rotating blades are treated as a two-dimensional circular source in the vertical plane. Inside the partially ensonified zone the effective A-weighted sound power decreases to zero when the receiver moves from the turbine toward the shadow zone. The presented results would be useful in practical applications to give a quick estimate of the effect of refraction on wind turbine noise.

Makarewicz, Rufin

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Importance of thermal effects and sea surface roughness for wind resource and wind shear at offshore sites  

E-Print Network [OSTI]

at offshore sites Bernhard Lange*, Søren Larsen# , Jørgen Højstrup# , Rebecca Barthelmie# *ForWind - Centre of offshore wind power utilisation depends on the favourable wind conditions offshore as compared to sites for this flow. It's applicability for wind power prediction at offshore sites is investigated using data from

Heinemann, Detlev

342

Floating offshore wind farms : demand planning & logistical challenges of electricity generation  

E-Print Network [OSTI]

Floating offshore wind farms are likely to become the next paradigm in electricity generation from wind energy mainly because of the near constant high wind speeds in an offshore environment as opposed to the erratic wind ...

Nnadili, Christopher Dozie, 1978-

2009-01-01T23:59:59.000Z

343

Understanding Trends in Wind Turbine Prices Over the Past Decade  

E-Print Network [OSTI]

embodied in wind turbine materials (6.37 GJ/kW) from the3.5-3.7). Wind turbines are material-intensive. Eachmanufacturing these materials into turbine components may

Bolinger, Mark

2012-01-01T23:59:59.000Z

344

Short-term Wind Power Prediction for Offshore Wind Farms -Evaluation of Fuzzy-Neural Network Based Models  

E-Print Network [OSTI]

Short-term Wind Power Prediction for Offshore Wind Farms - Evaluation of Fuzzy-Neural Network Based of wind power capacities are likely to take place offshore. As for onshore wind parks, short-term wind of offshore farms and their secure integration to the grid. Modeling the behavior of large wind farms

Paris-Sud XI, Université de

345

Advanced Wind Turbine Controls Reduce Loads (Fact Sheet)  

SciTech Connect (OSTI)

NREL's National Wind Technology Center provides the world's only dedicated turbine controls testing platforms.

Not Available

2012-03-01T23:59:59.000Z

346

A low order model for vertical axis wind turbines  

E-Print Network [OSTI]

A new computational model for initial sizing and performance prediction of vertical axis wind turbines

Drela, Mark

347

Wind Turbines and Health A Rapid Review of the Evidence  

E-Print Network [OSTI]

1 Wind Turbines and Health A Rapid Review of the Evidence July 2010 #12;2 Wind Turbines and Health of the evidence from current literature on the issue of wind turbines and potential impacts on human health regarding wind turbines and their potential effect on human health. It is important to note that these views

Firestone, Jeremy

348

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

349

Active load control techniques for wind turbines.  

SciTech Connect (OSTI)

This report provides an overview on the current state of wind turbine control and introduces a number of active techniques that could be potentially used for control of wind turbine blades. The focus is on research regarding active flow control (AFC) as it applies to wind turbine performance and loads. The techniques and concepts described here are often described as 'smart structures' or 'smart rotor control'. This field is rapidly growing and there are numerous concepts currently being investigated around the world; some concepts already are focused on the wind energy industry and others are intended for use in other fields, but have the potential for wind turbine control. An AFC system can be broken into three categories: controls and sensors, actuators and devices, and the flow phenomena. This report focuses on the research involved with the actuators and devices and the generated flow phenomena caused by each device.

van Dam, C.P. (University of California, Davis, CA); Berg, Dale E.; Johnson, Scott J. (University of California, Davis, CA)

2008-07-01T23:59:59.000Z

350

Estimated global ocean wind power potential from QuikSCAT observations, accounting for turbine characteristics and siting  

E-Print Network [OSTI]

Click Here for Full Article Estimated global ocean wind power potential from QuikSCAT observations. Zender (2010), Estimated global ocean wind power potential from QuikSCAT observations, accounting, global ocean usable wind power is evaluated for modern offshore turbine characteristics including hub

Zender, Charles

351

Assessment of Offshore Wind System Design, Safety, and Operation Standards  

SciTech Connect (OSTI)

This report is a deliverable for a project sponsored by the U.S. Department of Energy (DOE) entitled National Offshore Wind Energy Resource and Design Data Campaign -- Analysis and Collaboration (contract number DE-EE0005372; prime contractor -- AWS Truepower). The project objective is to supplement, facilitate, and enhance ongoing multiagency efforts to develop an integrated national offshore wind energy data network. The results of this initiative are intended to 1) produce a comprehensive definition of relevant met-ocean resource assets and needs and design standards, and 2) provide a basis for recommendations for meeting offshore wind energy industry data and design certification requirements.

Sirnivas, S.; Musial, W.; Bailey, B.; Filippelli, M.

2014-01-01T23:59:59.000Z

352

Reconstructing the intermittent dynamics of the torque in wind turbines  

E-Print Network [OSTI]

We apply a framework introduced in the late nineties to analyze load measurements in off-shore wind energy converters (WEC). The framework is borrowed from statistical physics and properly adapted to the analysis of multivariate data comprising wind velocity, power production and torque measurements, taken at one single WEC. In particular, we assume that wind statistics drives the fluctuations of the torque produced in the wind turbine and show how to extract an evolution equation of the Langevin type for the torque driven by the wind velocity. It is known that the intermittent nature of the atmosphere, i.e. of the wind field, is transferred to the power production of a wind energy converter and consequently to the shaft torque. We show that the derived stochastic differential equation quantifies the dynamical coupling of the measured fluctuating properties as well as it reproduces the intermittency observed in the data. Finally, we discuss our approach in the light of turbine monitoring, a particular importa...

Lind, Pedro G; Peinke, Joachim

2014-01-01T23:59:59.000Z

353

Title MULTI-TERMINAL VSC HVDC CONNECTION OF OFFSHORE WIND FARMS  

E-Print Network [OSTI]

additional advantages over AC cables when the connection of offshore wind farms is considered, since it

Contact Person Jef Beerten

354

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

355

New Facility to Shed Light on Offshore Wind Resource (Fact Sheet)  

SciTech Connect (OSTI)

Chesapeake Light Tower facility will gather key data for unlocking the nation's vast offshore wind resource.

Not Available

2013-05-01T23:59:59.000Z

356

PowerJet Wind Turbine Project  

SciTech Connect (OSTI)

PROJECT OBJECTIVE The PowerJet wind turbine overcomes problems characteristic of the small wind turbines that are on the market today by providing reliable output at a wide range of wind speeds, durability, silent operation at all wind speeds, and bird-safe operation. Prime Energy�s objective for this project was to design and integrate a generator with an electrical controller and mechanical controls to maximize the generation of electricity by its wind turbine. The scope of this project was to design, construct and test a mechanical back plate to control rotational speed in high winds, and an electronic controller to maximize power output and to assist the base plate in controlling rotational speed in high winds. The test model will continue to operate beyond the time frame of the project, with the ultimate goal of manufacturing and marketing the PowerJet worldwide. Increased Understanding of Electronic & Mechanical Controls Integrated With Electricity Generator The PowerJet back plate begins to open as wind speed exceeds 13.5 mps. The pressure inside the turbine and the turbine rotational speed are held constant. Once the back plate has fully opened at approximately 29 mps, the controller begins pulsing back to the generator to limit the rotational speed of the turbine. At a wind speed in excess of 29 mps, the controller shorts the generator and brings the turbine to a complete stop. As the wind speed subsides, the controller releases the turbine and it resumes producing electricity. Data collection and instrumentation problems prevented identification of the exact speeds at which these events occur. However, the turbine, controller and generator survived winds in excess of 36 mps, confirming that the two over-speed controls accomplished their purpose. Technical Effectiveness & Economic Feasibility Maximum Electrical Output The output of electricity is maximized by the integration of an electronic controller and mechanical over-speed controls designed and tested during the course of this project. The output exceeds that of the PowerJet�s 3-bladed counterparts (see Appendix). Durability All components of the PowerJet turbine assembly�including the electronic and mechanical controls designed, manufactured and field tested during the course of this project�proved to be durable through severe weather conditions, with constant operation and no interruption in energy production. Low Cost Materials for the turbine, generator, tower, charge controllers and ancillary parts are available at reasonable prices. Fabrication of these parts is also readily available worldwide. The cost of assembling and installing the turbine is reduced because it has fewer parts and requires less labor to manufacture and assemble, making it competitively priced compared with turbines of similar output manufactured in the U.S. and Europe. The electronic controller is the unique part to be included in the turbine package. The controllers can be manufactured in reasonably-sized production runs to keep the cost below $250 each. The data logger and 24 sensors are for research only and will be unnecessary for the commercial product. Benefit To Public The PowerJet wind-electric system is designed for distributed wind generation in 3 and 4 class winds. This wind turbine meets DOE�s requirements for a quiet, durable, bird-safe turbine that eventually can be deployed as a grid-connected generator in urban and suburban settings. Results As described more fully below and illustrated in the Appendices, the goals and objectives outlined in 2060 SOPO were fully met. Electronic and mechanical controls were successfully designed, manufactured and integrated with the generator. The turbine, tower, controllers and generators operated without incident throughout the test period, surviving severe winter and summer weather conditions such as extreme temperatures, ice and sustained high winds. The electronic controls were contained in weather-proof electrical boxes and the elec

Bartlett, Raymond J

2008-11-30T23:59:59.000Z

357

Dual-speed wind turbine generation  

SciTech Connect (OSTI)

Induction generator has been used since the early development of utility-scale wind turbine generation. An induction generator is the generator of choice because of its ruggedness and low cost. With an induction generator, the operating speed of the wind turbine is limited to a narrow range (almost constant speed). Dual- speed operation can be accomplished by using an induction generator with two different sets of winding configurations or by using a dual output drive train to drive two induction generators with two different rated speeds. With single-speed operation, the wind turbine operates at different power coefficients (Cp) as the wind speed varies. Operation at maximum Cp can occur only at a single wind speed. However, if the wind speed.varies across a wider range, the operating Cp will vary significantly. Dual-speed operation has the advantage of enabling the wind turbine to operate at near maximum Cp over a wider range of wind speeds. Thus, annual energy production can be increased. The dual-speed mode may generate less energy than a variable-speed mode; nevertheless, it offers an alternative which captures more energy than single-speed operation. In this paper, dual-speed operation of a wind turbine is investigated. Annual energy production is compared between single-speed and dual-speed operation. One type of control algorithm for dual-speed operation is proposed. Some results from a dynamic simulation will be presented to show how the control algorithm works as the wind turbine is exposed to varying wind speeds.

Muljadi, E.; Butterfield, C.P. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Handman, D. [Flowind Corp., San Rafael, CA (United States)] [Flowind Corp., San Rafael, CA (United States)

1996-10-01T23:59:59.000Z

358

Riso-M-2546 g Wind Turbine Test  

E-Print Network [OSTI]

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

359

Diffuser for augmenting a wind turbine  

DOE Patents [OSTI]

A diffuser for augmenting a wind turbine having means for energizing the boundary layer at several locations along the diffuser walls is improved by the addition of a short collar extending radially outward from the outlet of the diffuser.

Foreman, Kenneth M. (North Bellmore, NY); Gilbert, Barry L. (Westbury, NY)

1984-01-01T23:59:59.000Z

360

Vertical Axis Wind Turbine Foundation parameter study  

SciTech Connect (OSTI)

The dynamic failure criterion governing the dimensions of prototype Vertical Axis Wind Turbine Foundations is treated as a variable parameter. The resulting change in foundation dimensions and costs is examined.

Lodde, P.F.

1980-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Wind Turbine Drivetrain Condition Monitoring - An Overview  

SciTech Connect (OSTI)

This paper provides an overview of wind turbine drivetrain condition monitoring based on presentations from a condition monitoring workshop organized by the National Renewable Energy Laboratory in 2009 and on additional references.

Sheng, S; Veers, P.

2011-10-01T23:59:59.000Z

362

Data Analytics Methods in Wind Turbine Design and Operations  

E-Print Network [OSTI]

This dissertation develops sophisticated data analytic methods to analyze structural loads on, and power generation of, wind turbines. Wind turbines, which convert the kinetic energy in wind into electrical power, are operated within stochastic...

Lee, Giwhyun

2013-05-22T23:59:59.000Z

363

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

SciTech Connect (OSTI)

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

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

2010-01-01T23:59:59.000Z

364

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

SciTech Connect (OSTI)

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

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

2010-07-01T23:59:59.000Z

365

Collegiate Wind Competition Turbines go Blade-to-Blade in Wind...  

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

This wind tunnel constructed by NREL engineers will test the small wind turbines designed by 10 university teams competing in DOE's Collegiate Wind Competition. This wind tunnel...

366

Passively cooled direct drive wind turbine  

DOE Patents [OSTI]

A wind turbine is provided that passively cools an electrical generator. The wind turbine includes a plurality of fins arranged peripherally around a generator house. Each of the fins being oriented at an angle greater than zero degrees to allow parallel flow of air over the fin. The fin is further tapered to allow a constant portion of the fin to extend beyond the air stream boundary layer. Turbulence initiators on the nose cone further enhance heat transfer at the fins.

Costin, Daniel P. (Chelsea, VT)

2008-03-18T23:59:59.000Z

367

Overcoming Challenges in America’s Offshore Wind Industry  

Office of Energy Efficiency and Renewable Energy (EERE)

A year of progress, preparation and promise was the theme connecting two days of panels and presentations last month at the 2013 American Wind Energy Association WINDPOWER Offshore conference in Providence, Rhode Island.

368

Economic Impacts of Wind Turbine Development in U.S. Counties  

E-Print Network [OSTI]

15 percent)). Cumulative wind turbine capacity installed inper capita income of wind turbine development (measured inour sample, cumulative wind turbine capacity on a per person

J., Brown

2012-01-01T23:59:59.000Z

369

Dynamic response analysis of a 900 kW wind turbine subject to ground excitation  

E-Print Network [OSTI]

response analysis of wind turbine towers including soil-were attached to the wind turbine tower at 7 locations alongload demands on the wind turbine tower structure. Additional

Caudillo, Adrian Felix

2012-01-01T23:59:59.000Z

370

Use of synthetic aperture radar for offshore wind resource assessment and wind farm development in the UK   

E-Print Network [OSTI]

The UK has an abundant offshore wind resource with offshore wind farming set to grow rapidly over the coming years. Optimisation of energy production is of the utmost importance and accurate estimates of wind speed distributions are critical...

Cameron, Iain Dickson

2008-01-01T23:59:59.000Z

371

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

SciTech Connect (OSTI)

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

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

2011-05-01T23:59:59.000Z

372

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

SciTech Connect (OSTI)

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

Huskey, A.; Forsyth, T.

2009-06-01T23:59:59.000Z

373

Conceptual Model of Offshore Wind Environmental Risk Evaluation System  

SciTech Connect (OSTI)

In this report we describe the development of the Environmental Risk Evaluation System (ERES), a risk-informed analytical process for estimating the environmental risks associated with the construction and operation of offshore wind energy generation projects. The development of ERES for offshore wind is closely allied to a concurrent process undertaken to examine environmental effects of marine and hydrokinetic (MHK) energy generation, although specific risk-relevant attributes will differ between the MHK and offshore wind domains. During FY10, a conceptual design of ERES for offshore wind will be developed. The offshore wind ERES mockup described in this report will provide a preview of the functionality of a fully developed risk evaluation system that will use risk assessment techniques to determine priority stressors on aquatic organisms and environments from specific technology aspects, identify key uncertainties underlying high-risk issues, compile a wide-range of data types in an innovative and flexible data organizing scheme, and inform planning and decision processes with a transparent and technically robust decision-support tool. A fully functional version of ERES for offshore wind will be developed in a subsequent phase of the project.

Anderson, Richard M.; Copping, Andrea E.; Van Cleve, Frances B.; Unwin, Stephen D.; Hamilton, Erin L.

2010-06-01T23:59:59.000Z

374

Baseline Design of a Hurricane-Resilient Wind Turbine (Poster)  

SciTech Connect (OSTI)

Under U.S. Department of Energy-sponsored research FOA 415, the National Renewable Energy Laboratory led a team of research groups to produce a complete design of a large wind turbine system to be deployable in the western Gulf of Mexico region. As such, the turbine and its support structure would be subjected to hurricane-loading conditions. Among the goals of this research was the exploration of advanced and innovative configurations that would help decrease the levelized cost of energy (LCOE) of the design, and the expansion of the basic IEC design load cases (DLCs) to include hurricane environmental conditions. The wind turbine chosen was a three-bladed, downwind, direct-drive, 10-MW rated machine. The rotor blade was optimized based on an IEC load suite analysis. The drivetrain and nacelle components were scaled up from a smaller sized turbine using industry best practices. The tubular steel tower was sized using ultimate load values derived from the rotor optimization analysis. The substructure is an innovative battered and raked jacket structure. The innovative turbine has also been modeled within an aero-servo-hydro-elastic tool, and future papers will discuss results of the dynamic response analysis for select DLCs. Although multiple design iterations could not be performed because of limited resources in this study, and are left to future research, the obtained data will offer a good indication of the expected LCOE for large offshore wind turbines to be deployed in subtropical U.S. waters, and the impact design innovations can have on this value.

Damiani, R.; Robertson, A.; Schreck, S.; Maples, B.; Anderson, M.; Finucane, Z.; Raina, A.

2014-10-01T23:59:59.000Z

375

Jet spoiler arrangement for wind turbine  

DOE Patents [OSTI]

An air jet spoiler arrangement is provided for a Darrieus-type vertical axis wind-powered turbine. Air is drawn into hollow turbine blades through air inlets at the ends thereof and is ejected in the form of air jets through small holes or openings provided along the lengths of the blades. The air jets create flow separation at the surfaces of the turbine blades, thereby inducing stall conditions and reducing the output power. A feedback control unit senses the power output of the turbine and controls the amount of air drawn into the air inlets accordingly.

Cyrus, Jack D. (Corrales, NM); Kadlec, Emil G. (Albuquerque, NM); Klimas, Paul C. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

376

Jet spoiler arrangement for wind turbine  

DOE Patents [OSTI]

An air jet spoiler arrangement is provided for a Darrieus-type vertical axis wind-powered turbine. Air is drawn into hollow turbine blades through air inlets at the end thereof and is ejected in the form of air jets through small holes or openings provided along the lengths of the blades. The air jets create flow separation at the surfaces of the turbine blades, thereby including stall conditions and reducing the output power. A feedback control unit senses the power output of the turbine and controls the amount of air drawn into the air inlets accordingly.

Cyrus, J.D.; Kadlec, E.G.; Klimas, P.C.

1983-09-15T23:59:59.000Z

377

Xi an Nordex Wind Turbine Co Ltd aka Xi an Weide Wind Power Equipment...  

Open Energy Info (EERE)

Wind Turbine Co Ltd aka Xi an Weide Wind Power Equipment Co Ltd Jump to: navigation, search Name: Xi'an Nordex Wind Turbine Co Ltd (aka Xi'an Weide Wind Power Equipment Co Ltd)...

378

WIND ENERGY STUDIES OFFSHORE USING SATELLITE REMOTE SENSING MERETE BRUUN CHRISTIANSEN  

E-Print Network [OSTI]

1 WIND ENERGY STUDIES OFFSHORE USING SATELLITE REMOTE SENSING MERETE BRUUN CHRISTIANSEN Wind Energy sensing; the method can be extended to a mapping of wind resources. Further, effects of a large offshore

379

Vertical axis wind turbine control strategy  

SciTech Connect (OSTI)

Early expensive in automatic operation of the Sandia 17-m vertical axis research wind turbine (VAWT) has demonstrated the need for a systematic study of control algorithms. To this end, a computer model has been developed that uses actual wind time series and turbine performance data to calculate the power produced by the Sandia 17-m VAWT operating in automatic control. The model has been used to investigate the influence of starting algorithms on annual energy production. The results indicate that, depending on turbine and local wind characteristics, a bad choice of a control algorithm can significantly reduce overall energy production. The model can be used to select control algorithms and threshold parameters that maximize long-term energy production. An attempt has been made to generalize these results from local site and turbine characteristics to obtain general guidelines for control algorithm design.

McNerney, G.M.

1981-08-01T23:59:59.000Z

380

E-Print Network 3.0 - advanced turbine development Sample Search...  

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

Computer Technologies and Information Sciences ; Biology and Medicine 10 Offshore Wind Turbines: Some Technical Challenges Summary: for the first round of offshore windfarm...

Note: This page contains sample records for the topic "offshore wind turbines" 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

Floating offshore wind farms : demand planning & logistical challenges of electricity generation .  

E-Print Network [OSTI]

??Floating offshore wind farms are likely to become the next paradigm in electricity generation from wind energy mainly because of the near constant high wind… (more)

Nnadili, Christopher Dozie, 1978-

2009-01-01T23:59:59.000Z

382

Foundations for an offshore wind turbine  

E-Print Network [OSTI]

Worldwide energy demand is growing rapidly, and there is great interest in reducing the current reliance on fossil fuels for uses such as power generation, transportation, and manufacturing. Renewable energy sources, such ...

Kopp, Duncan Rath

2010-01-01T23:59:59.000Z

383

Offshore Wind Park Connection to an HVDC Platform, without using an AC Collector Platform.  

E-Print Network [OSTI]

?? This thesis investigates the comparison between two different alternating current topologies of an offshore wind farms connection to an offshore high voltage direct current… (more)

Ahmad, Haseeb

2012-01-01T23:59:59.000Z

384

Subhourly wind forecasting techniques for wind turbine operations  

SciTech Connect (OSTI)

Three models for making automated forecasts of subhourly wind and wind power fluctuations were examined to determine the models' appropriateness, accuracy, and reliability in wind forecasting for wind turbine operation. Such automated forecasts appear to have value not only in wind turbine control and operating strategies, but also in improving individual wind turbine control and operating strategies, but also in improving individual wind turbine operating strategies (such as determining when to attempt startup). A simple persistence model, an autoregressive model, and a generalized equivalent Markhov (GEM) model were developed and tested using spring season data from the WKY television tower located near Oklahoma City, Oklahoma. The three models represent a pure measurement approach, a pure statistical method and a statistical-dynamical model, respectively. Forecasting models of wind speed means and measures of deviations about the mean were developed and tested for all three forecasting techniques for the 45-meter level and for the 10-, 30- and 60-minute time intervals. The results of this exploratory study indicate that a persistence-based approach, using onsite measurements, will probably be superior in the 10-minute time frame. The GEM model appears to have the most potential in 30-minute and longer time frames, particularly when forecasting wind speed fluctuations. However, several improvements to the GEM model are suggested. In comparison to the other models, the autoregressive model performed poorly at all time frames; but, it is recommended that this model be upgraded to an autoregressive moving average (ARMA or ARIMA) model. The primary constraint in adapting the forecasting models to the production of wind turbine cluster power output forecasts is the lack of either actual data, or suitable models, for simulating wind turbine cluster performance.

Wegley, H.L.; Kosorok, M.R.; Formica, W.J.

1984-08-01T23:59:59.000Z

385

Pitch-controlled variable-speed wind turbine generation  

SciTech Connect (OSTI)

Wind energy is a viable option to complement other types of pollution-free generation. In the early development of wind energy, the majority of wind turbines were operated at constant speed. Recently, the number of variable-speed wind turbines installed in wind farms has increased and more wind turbine manufacturers are making variable-speed wind turbines. This paper covers the operation of variable-speed wind turbines with pitch control. The system the authors considered is controlled to generate maximum energy while minimizing loads. The maximization of energy was only carried out on a static basis and only drive train loads were considered as a constraint. In medium wind speeds, the generator and power converter control the wind turbine to capture maximum energy from the wind. In the high wind speed region, the wind turbine is controlled to maintain the aerodynamic power produced by the wind turbine. Two methods to adjust the aerodynamic power were investigated: pitch control and generator load control, both of which are employed to control the operation of the wind turbine. The analysis and simulation shows that the wind turbine can be operated at its optimum energy capture while minimizing the load on the wind turbine for a wide range of wind speeds.

Muljadi, E.; Butterfield, C.P.

2000-03-01T23:59:59.000Z

386

Variable diameter wind turbine rotor blades  

DOE Patents [OSTI]

A system and method for changing wind turbine rotor diameters to meet changing wind speeds and control system loads is disclosed. The rotor blades on the wind turbine are able to adjust length by extensions nested within or containing the base blade. The blades can have more than one extension in a variety of configurations. A cable winching system, a hydraulic system, a pneumatic system, inflatable or elastic extensions, and a spring-loaded jack knife deployment are some of the methods of adjustment. The extension is also protected from lightning by a grounding system.

Jamieson, Peter McKeich; Hornzee-Jones, Chris; Moroz, Emilian M.; Blakemore, Ralph W.

2005-12-06T23:59:59.000Z

387

Assessing the Importance of Nonlinearities in the Development of a Substructure Model for the Wind Turbine CAE Tool FAST: Preprint  

SciTech Connect (OSTI)

Design and analysis of wind turbines are performed using aero-servo-elastic tools that account for the nonlinear coupling between aerodynamics, controls, and structural response. The NREL-developed computer-aided engineering (CAE) tool FAST also resolves the hydrodynamics of fixed-bottom structures and floating platforms for offshore wind applications. This paper outlines the implementation of a structural-dynamics module (SubDyn) for offshore wind turbines with space-frame substructures into the current FAST framework, and focuses on the initial assessment of the importance of structural nonlinearities. Nonlinear effects include: large displacements, axial shortening due to bending, cross-sectional transverse shear effects, etc.

Damiani, R.; Jonkman, J.; Robertson, A.; Song, H.

2013-03-01T23:59:59.000Z

388

Dynamic Simulation of DFIG Wind Turbines on FPGA Boards  

E-Print Network [OSTI]

Dynamic Simulation of DFIG Wind Turbines on FPGA Boards Hao Chen, Student Member, IEEE, Song Sun is a friction coefficient. The wind turbine model is based on the relation between the upstream wind speed V w + 1 where p is the air density; Rw is the wind turbine radius; cp (A, (3) is the performance

Zambreno, Joseph A.

389

Wind Turbine Test \\^ind Matic WM 15S  

E-Print Network [OSTI]

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

390

Cambridge Danehy Park Wind Turbine Preliminary Project Assessment  

E-Print Network [OSTI]

Cambridge Danehy Park Wind Turbine Preliminary Project Assessment Overview MIT Wind Energy Projects 4 / 25 2.5 / 25 Rated Wind Speed (m/s) 13 10 14.5 ~15 12 The above turbines were chosen to provide, several recent studies examining birds and wind turbines have observed that most birds usually avoid

391

Ris-R-1111(EN) Ultimate Loading of Wind Turbines  

E-Print Network [OSTI]

Risø-R-1111(EN) Ultimate Loading of Wind Turbines Gunner Chr. Larsen, Knut Ronold, Hans E analysis as well as a wind turbine reliability study. In the wind climate analysis, the distribution to analyse wind turbine components with respect to failure in ultimate loading, and in addition to establish

392

Ris-PhD-Report Wind Turbines: Unsteady Aerodynamics and  

E-Print Network [OSTI]

Risø-PhD-Report Wind Turbines: Unsteady Aerodynamics and Inflow Noise Brian Riget Broe Risø-PhD-47 Title: Wind Turbines: Unsteady Aerodynamics and Inflow Noise Division: Wind Energy Division Risø-PhD-47(EN) December 2009 Abstract (max. 2000 char.): Aerodynamical noise from wind turbines due

393

TECHNICALADVANCES IN EPOXY TECHNOLOGY FOR WIND TURBINE BLADE COMPOSITE FABRICATION  

E-Print Network [OSTI]

TECHNICALADVANCES IN EPOXY TECHNOLOGY FOR WIND TURBINE BLADE COMPOSITE FABRICATION George C. Jacob reliability in many demanding applications including components for aerospace and wind turbine blades. While in operation, wind turbine blades are subjected to significant stresses from their movement, wind and other

394

Power control of a wind farm with active stall wind turbines and AC grid connection  

E-Print Network [OSTI]

Power control of a wind farm with active stall wind turbines and AC grid connection Anca D. Hansen1 controller for a wind farm made-up exclusively of active stall wind turbines with AC grid connection wind farm control involves both the control on wind turbine level as well as the central control

395

Wind Turbine Micropitting Workshop: A Recap  

SciTech Connect (OSTI)

Micropitting is a Hertzian fatigue phenomenon that affects many wind turbine gearboxes, and it affects the reliability of the machines. With the major growth and increasing dependency on renewable energy, mechanical reliability is an extremely important issue. The U.S. Department of Energy has made a commitment to improving wind turbine reliability and the National Renewable Energy Laboratory (NREL) has started a gearbox reliability project. Micropitting as an issue that needed attention came to light through this effort. To understand the background of work that had already been accomplished, and to consolidate some level of collective understanding of the issue by acknowledged experts, NREL hosted a wind turbine micropitting workshop, which was held at the National Wind Technology Center in Boulder, Colorado, on April 15 and 16, 2009.

Sheng, S.

2010-02-01T23:59:59.000Z

396

Load attenuating passively adaptive wind turbine blade  

DOE Patents [OSTI]

A method and apparatus for improving wind turbine performance by alleviating loads and controlling the rotor. The invention employs the use of a passively adaptive blade that senses the wind velocity or rotational speed, and accordingly modifies its aerodynamic configuration. The invention exploits the load mitigation prospects of a blade that twists toward feather as it bends. The invention includes passively adaptive wind turbine rotors or blades with currently preferred power control features. The apparatus is a composite fiber horizontal axis wind-turbine blade, in which a substantial majority of fibers in the blade skin are inclined at angles of between 15 and 30 degrees to the axis of the blade, to produces passive adaptive aeroelastic tailoring (bend-twist coupling) to alleviate loading without unduly jeopardizing performance.

Veers, Paul S. (Albuquerque, NM); Lobitz, Donald W. (Albuquerque, NM)

2003-01-01T23:59:59.000Z

397

Load attenuating passively adaptive wind turbine blade  

DOE Patents [OSTI]

A method and apparatus for improving wind turbine performance by alleviating loads and controlling the rotor. The invention employs the use of a passively adaptive blade that senses the wind velocity or rotational speed, and accordingly modifies its aerodynamic configuration. The invention exploits the load mitigation prospects of a blade that twists toward feather as it bends. The invention includes passively adaptive wind turbine rotors or blades with currently preferred power control features. The apparatus is a composite fiber horizontal axis wind-turbine blade, in which a substantial majority of fibers in the blade skin are inclined at angles of between 15 and 30 degrees to the axis of the blade, to produces passive adaptive aeroelastic tailoring (bend-twist coupling) to alleviate loading without unduly jeopardizing performance.

Veers, Paul S.; Lobitz, Donald W.

2003-01-07T23:59:59.000Z

398

Assessment of Ports for Offshore Wind Development in the United States  

SciTech Connect (OSTI)

As offshore wind energy develops in the United States, port facilities will become strategic hubs in the offshore wind farm supply chain because all plant and transport logistics must transit through these facilities. Therefore, these facilities must provide suitable infrastructure to meet the specific requirements of the offshore wind industry. As a result, it is crucial that federal and state policy-makers and port authorities take effective action to position ports in the offshore wind value chain to take best advantage of their economic potential. The U.S. Department of Energy tasked the independent consultancy GL Garrad Hassan (GL GH) with carrying out a review of the current capability of U.S. ports to support offshore wind project development and an assessment of the challenges and opportunities related to upgrading this capability to support the growth of as many as 54 gigawatts of offshore wind installed in U.S. waters by 2030. The GL GH report and the open-access web-based Ports Assessment Tool resulting from this study will aid decision-makers in making informed decisions regarding the choice of ports for specific offshore projects, and the types of investments that would be required to make individual port facilities suitable to serve offshore wind manufacturing, installation and/or operations. The offshore wind industry in the United States is still in its infancy and this study finds that additional port facilities capable of supporting offshore wind projects are needed to meet the anticipated project build-out by 2030; however, no significant barriers exist to prevent the development of such facilities. Furthermore, significant port capabilities are in place today with purpose-build port infrastructure currently being built. While there are currently no offshore wind farms operating in the United States, much of the infrastructure critical to the success of such projects does exist, albeit in the service of other industries. This conclusion is based on GL GH’s review of U.S. ports infrastructure and its readiness to support the development of proposed offshore wind projects in U.S. waters. Specific examples of facility costs and benefits are provided for five coastal regions (North Atlantic, South Atlantic, Gulf of Mexico, Great Lakes, and Pacific) around the country. GL GH began this study by identifying the logistical requirements of offshore wind ports to service offshore wind. This review was based on lessons learned through industry practice in Northern Europe. A web-based port readiness assessment tool was developed to allow a capability gap analysis to be conducted on existing port facilities based on the identified requirements. Cost models were added to the assessment tool, which allowed GL GH to estimate the total upgrade cost to a port over the period 2014-2030 based on a set of regional project build-out scenarios. Port fee information was gathered from each port allowing an estimate of the potential revenue to the port under this same set of scenarios. The comparison of these revenue and improvement cost figures provides an initial indication of the level of offshore wind port readiness. To facilitate a more in-depth infrastructure analysis, six ports from different geographic regions, with varied levels of interest and preparedness towards offshore wind, were evaluated by modeling a range of installation strategies and port use types to identify gaps in capability and potential opportunities for economic development. Commonalities, trends, and specific examples from these case studies are presented and provide a summary of the current state of offshore wind port readiness in the U.S. and also illustrate the direction some ports have chosen to take to prepare for offshore wind projects. For example, the land area required for wind turbine and foundation manufacturing is substantial, particularly due to the large size of offshore wind components. Also, the necessary bearing capacities of the quayside and storage area are typically greater for offshore wind components than for more conventiona

Elkinton, Chris [DNV GL] [DNV GL; Blatiak, Alicia; Ameen, Hafsa

2014-03-21T23:59:59.000Z

399

2014 Sandia Wind Turbine Blade Workshop  

Broader source: Energy.gov [DOE]

The U.S. Energy Department's Sandia National Laboratories will host its 2014 Sandia Wind Turbine Blade Workshop at the Marriott Pyramid North in Albuquerque, New Mexico. The workshop provides a unique, blade focused collaborative forum that will bring together wind energy leaders from industry, academia, and government. Stay tuned for updates. Information regarding past Wind Workshops can be found at: http://windworkshops.sandia.gov/.

400

Coupled dynamic analysis of floating offshore wind farms  

E-Print Network [OSTI]

it is economically feasible and technologically manageable. So far, most of the offshore wind farm research has been limited to fixed platforms in shallow-water areas. In the water depth deeper than 30m, however, floating-type wind farms tend to be more feasible...

Shim, Sangyun

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "offshore wind turbines" 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

Virginia Offshore Wind Cost Reduction Through Innovation Study (VOWCRIS) (Poster)  

SciTech Connect (OSTI)

The VOWCRIS project is an integrated systems approach to the feasibility-level design, performance, and cost-of-energy estimate for a notional 600-megawatt offshore wind project using site characteristics that apply to the Wind Energy Areas of Virginia, Maryland and North Carolina.

Maples, B.; Campbell, J.; Arora, D.

2014-10-01T23:59:59.000Z

402

Comparing Single and Multiple Turbine Representations in a Wind Farm Simulation: Preprint  

SciTech Connect (OSTI)

This paper compares single turbine representation versus multiple turbine representation in a wind farm simulation.

Muljadi, E.; Parsons, B.

2006-03-01T23:59:59.000Z

403

E-Print Network 3.0 - axis wind turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: axis wind turbines...

404

Methods and apparatus for reducing peak wind turbine loads  

DOE Patents [OSTI]

A method for reducing peak loads of wind turbines in a changing wind environment includes measuring or estimating an instantaneous wind speed and direction at the wind turbine and determining a yaw error of the wind turbine relative to the measured instantaneous wind direction. The method further includes comparing the yaw error to a yaw error trigger that has different values at different wind speeds and shutting down the wind turbine when the yaw error exceeds the yaw error trigger corresponding to the measured or estimated instantaneous wind speed.

Moroz, Emilian Mieczyslaw

2007-02-13T23:59:59.000Z

405

2009 WIND TURBINE IMPACT STUDY APPRAISAL GROUP ONE 9/9/2009 WIND TURBINE IMPACT STUDY  

E-Print Network [OSTI]

This is a study of the impact that wind turbines have on residential property value. The wind turbines that are the focus of this study are the larger turbines being approximately 389ft tall and producing 1.0+ megawatts each, similar to the one pictured to the right. The study has been broken into three component parts, each looking at the value impact of the wind turbines from a different perspective. The three parts are: (1) a literature study, which reviews and summarizes what has been published on this matter found in the general media; (2) an opinion survey, which was given to area Realtors to learn their opinions on the impact of wind turbines in

Fond Du; Lac Counties Wisconsin

2009-01-01T23:59:59.000Z

406

Offshore wind resources from satellite SAR Charlotte Bay Hasager, Merete Bruun Christiansen, Morten Nielsen,  

E-Print Network [OSTI]

Offshore wind resources from satellite SAR Charlotte Bay Hasager, Merete Bruun Christiansen, Morten ocean wind maps were described. For offshore wind resource estimation based on satellite observations and the near-coastal zone (up to 40 km offshore) is not mapped. In contrast, Envisat ASAR wind maps can

407

Environmental impact for offshore wind farms: Geolocalized Life Cycle Assessment (LCA) approach  

E-Print Network [OSTI]

Environmental impact for offshore wind farms: Geolocalized Life Cycle Assessment (LCA) approach and floating offshore wind farms. This work was undertaken within the EU- sponsored EnerGEO project, aiming, and its use for the evaluation of environmental impacts of wind energy. The effects of offshore wind farms

Boyer, Edmond

408

MODULAR MULTI-LEVEL CONVERTER BASED HVDC SYSTEM FOR GRID CONNECTION OF OFFSHORE WIND  

E-Print Network [OSTI]

MODULAR MULTI-LEVEL CONVERTER BASED HVDC SYSTEM FOR GRID CONNECTION OF OFFSHORE WIND POWER PLANT U off-shore wind power plants. The MMC consists of a large number of simple voltage sourced converter offshore wind power plants (WPP) because they offer higher energy yield due to a superior wind profile

Chaudhary, Sanjay

409

California offshore wind energy potential Michael J. Dvorak a,*, Cristina L. Archer b  

E-Print Network [OSTI]

California (CA). The siting of an offshore wind farm is limited by water depth, with shallow water being generally preferable economically. Acceptable depths for offshore wind farms are divided into three based wind farms which peak at night, the offshore winds near Cape Mendocino are consistently fast

410

Impacts of Wind Turbine Proximity on Property Values in Massachusetts  

E-Print Network [OSTI]

About Large Offshore Wind Power: Underlying Factors. EnergyS. (2009) The Impact of Wind Power Proj- ects on Residentialof Power. Section in Wind Power in View: Energy Landscapes

Atkinson-Palombo, Carol

2014-01-01T23:59:59.000Z

411

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

412

Methods of making wind turbine rotor blades  

DOE Patents [OSTI]

A method of manufacturing a root portion of a wind turbine blade includes, in an exemplary embodiment, providing an outer layer of reinforcing fibers including at least two woven mats of reinforcing fibers, providing an inner layer of reinforcing fibers including at least two woven mats of reinforcing fibers, and positioning at least two bands of reinforcing fibers between the inner and outer layers, with each band of reinforcing fibers including at least two woven mats of reinforcing fibers. The method further includes positioning a mat of randomly arranged reinforcing fibers between each pair of adjacent bands of reinforcing fibers, introducing a polymeric resin into the root potion of the wind turbine blade, infusing the resin through the outer layer, the inner layer, each band of reinforcing fibers, and each mat of random reinforcing fibers, and curing the resin to form the root portion of the wind turbine blade.

Livingston, Jamie T. (Pensacola, FL); Burke, Arthur H. E. (Gulf Breeze, FL); Bakhuis, Jan Willem (Nijverdal, NL); Van Breugel, Sjef (Enschede, NL); Billen, Andrew (Daarlerveen, NL)

2008-04-01T23:59:59.000Z

413

Distributed Wind Market Report: Small Turbines Lead to Big Growth...  

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

Growth in Exports August 18, 2014 - 12:13pm Addthis 1 of 11 Three 100 kilowatt (kW) wind turbines in Bisaccia, Italy. Last year, U.S. small wind turbines were exported to more than...

414

Timken Producing Parts for Wind Turbines | Department of Energy  

Energy Savers [EERE]

Timken Producing Parts for Wind Turbines Timken Producing Parts for Wind Turbines June 28, 2010 - 3:38pm Addthis Some of Timkens bearings are so large that a small car could...

415

A doubly-fed permanent magnet generator for wind turbines  

E-Print Network [OSTI]

Optimum extraction of energy from a wind turbine requires that turbine speed vary with wind speed. Existing solutions to produce constant-frequency electrical output under windspeed variations are undesirable due to ...

Thomas, Andrew J. (Andrew Joseph), 1981-

2004-01-01T23:59:59.000Z

416

Field Examples of Axial Cracked Bearings in Wind Turbine Gearboxes...  

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

Field Examples of Axial Cracked Bearings in Wind Turbine Gearboxes Presented by Paul John Baker of FrontierPro Services at the Wind Turbine Tribology Seminar 2014. 141030 Axial...

417

Understanding Trends in Wind Turbine Prices Over the Past Decade  

E-Print Network [OSTI]

Wind turbines are material-intensive. Each individual tower,and “towers and lattice masts,” and assume that 100% of the former and 95% of the latter are attributable to wind turbines.

Bolinger, Mark

2012-01-01T23:59:59.000Z

418

Reduced Order Structural Modeling of Wind Turbine Blades  

E-Print Network [OSTI]

Conventional three dimensional structural analysis methods prove to be expensive for the preliminary design of wind turbine blades. However, wind turbine blades are large slender members with complex cross sections. They can be accurately modeled...

Jonnalagadda, Yellavenkatasunil

2011-10-21T23:59:59.000Z

419

Wind resources and wind farm wake effects offshore observed from satellite  

E-Print Network [OSTI]

Wind resources and wind farm wake effects offshore observed from satellite Charlotte Bay Hasager, Wind Energy Department, Roskilde, Denmark Charlotte.hasager@risoe.dk, poul.astrup@risoe.dk, merete.bruun.Christiansen@risoe.dk, morten.Nielsen@risoe.dk, r.barthelmie@risoe.dk Abstract: Satellite observations of ocean wind speed

420

SciTech Connect: Improved Wind Turbine Drivetrain Reliability...  

Office of Scientific and Technical Information (OSTI)

and Renewable Energy Country of Publication: United States Language: English Subject: 17 WIND ENERGY; 97 MATHEMATICS AND COMPUTING NONTORQUE LOADS; WIND TURBINE DRIVETRAIN;...

Note: This page contains sample records for the topic "offshore wind turbines" 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

Titan propels GE wind turbine research into new territory | ornl...  

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

Titan propels GE wind turbine research into new territory January 17, 2014 The amount of global electricity supplied by wind, the world's fastest growing energy source, is expected...

422

Sandia National Laboratories: Sandia Vertical-Axis Wind-Turbine...  

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

ClimateECEnergyComputational Modeling & SimulationSandia Vertical-Axis Wind-Turbine Research Presented at Science of Making Torque from Wind Conference Sandia Vertical-Axis...

423

Design of PM generator for avertical axis wind turbine.  

E-Print Network [OSTI]

?? The task in this project is to design a generator for a vertical axis wind turbine withpower rated to 20kW at a wind speed… (more)

Rynkiewicz, Mateusz

2012-01-01T23:59:59.000Z

424

Establishment of Small Wind Turbine Regional Test Centers (Presentation)  

SciTech Connect (OSTI)

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

Sinclair, K.

2011-09-16T23:59:59.000Z

425

Methods and apparatus for rotor load control in wind turbines  

DOE Patents [OSTI]

A wind turbine having a rotor, at least one rotor blade, and a plurality of generators, of which a first generator is configured to provide power to an electric grid and a second generator is configured to provide power to the wind turbine during times of grid loss. The wind turbine is configured to utilize power provided by the second generator to reduce loads on the wind turbine during times of grid loss.

Moroz, Emilian Mieczyslaw

2006-08-22T23:59:59.000Z

426

The Effect of Wind Speed and Electric Rates On Wind Turbine Economics  

E-Print Network [OSTI]

The Effect of Wind Speed and Electric Rates On Wind Turbine Economics Economics of wind power depends mainly on the wind speeds and the turbine make and model. Definition: Simple Payback The "Simple period of a small wind power project. All the figures are per turbine, so it can be used for a one, two

Massachusetts at Amherst, University of

427

Dynamic stall on wind turbine blades  

SciTech Connect (OSTI)

Dynamic loads must be predicted accurately in order to estimate the fatigue life of wind turbines operating in turbulent environments. Dynamic stall contributes to increased dynamic loads during normal operation of all types of horizontal-axis wind turbine (HAWTs). This report illustrates how dynamic stall varies throughout the blade span of a 10 m HAWT during yawed and unyawed operating conditions. Lift, drag, and pitching moment coefficients during dynamics stall are discussed. Resulting dynamic loads are presented, and the effects of dynamic stall on yaw loads are demonstrated using a yaw loads dynamic analysis (YAWDYN). 12 refs., 22 figs., 1 tab.

Butterfield, C.P.; Simms, D.; Scott, G. [National Renewable Energy Lab., Golden, CO (United States)] [National Renewable Energy Lab., Golden, CO (United States); Hansen, A.C. [Utah Univ., Salt Lake City, UT (United States)] [Utah Univ., Salt Lake City, UT (United States)

1991-12-01T23:59:59.000Z

428

Amplitude modulation of wind turbine noise  

E-Print Network [OSTI]

Due to swish and thump amplitude modulation, the noise of wind turbines cause more annoyance than other environmental noise of the same average level. The wind shear accounts for the thump modulation (van den Berg effect). Making use of the wind speed measurements at the hub height, as well as at the top and the bottom of the rotor disc (Fig.1), the non-standard wind profile is applied. It causes variations in the A-weighted sound pressure level, LpA. The difference between the maximum and minimum of LpA characterizes thump modulation (Fig.2).

Makarewicz, Rufin

2013-01-01T23:59:59.000Z

429

Wind shear climatology for large wind turbine generators  

SciTech Connect (OSTI)

Climatological wind shear analyses relevant to the design and operation of multimegawatt wind turbines are provided. Insight is provided for relating the wind experienced by a rotating blade in a shear flow to the analysis results. A simple analysis of the wind experienced by a rotating blade for three types of wind shear profiles under steady-state conditions is presented in graphical form. Comparisons of the magnitude and frequency of the variations in 1) the wind sensed by a single blade element, 2) the sum, and 3) the difference of the winds sensed by opposite blade elements show strong sensitivity to profile shape. These three items represent forcing functions that can be related to 1) flatwise bending moment, 2) torque on the shaft, and 3) teeter angle. A computer model was constructed to simulate rotational sampling of 10-s sampled winds from a tall tower for three different types of large wind turbines. Time series produced by the model indicated that the forcing functions on a rotating blade vary according to the shear profile encountered during each revolution as opposed to a profile derived from average wind conditions, e.g., hourly average winds. An analysis scheme was developed to establish a climatology of wind shear profiles derived from 10-s sampled winds and hourly average winds measured over a one-year period at several levels on a tall tower. Because of the sensitivity of the forcing function variability to profile shape, the analyses performed and presented are in the form of joint frequency distributions of velocity differences of the the top-to-hub versus the hub-to-bottom portion of disks of rotation for the three turbine configurations.

Elliott, D.L.; Wendell, L.L.; Heflick, S.K.

1982-10-01T23:59:59.000Z

430

Comparison of Second-Order Loads on a Semisubmersible Floating Wind Turbine: Preprint  

SciTech Connect (OSTI)

As offshore wind projects move to deeper waters, floating platforms become the most feasible solution for supporting the turbines. The oil and gas industry has gained experience with floating platforms that can be applied to offshore wind projects. This paper focuses on the analysis of second-order wave loading on semisubmersible platforms. Semisubmersibles, which are being chosen for different floating offshore wind concepts, are particularly prone to slow-drift motions. The slack catenary moorings usually result in large natural periods for surge and sway motions (more than 100 s), which are in the range of the second-order difference-frequency excitation force. Modeling these complex structures requires coupled design codes. Codes have been developed that include turbine aerodynamics, hydrodynamic forces on the platform, restoring forces from the mooring lines, flexibility of the turbine, and the influence of the turbine control system. In this paper two different codes are employed: FAST, which was developed by the National Renewable Energy Laboratory, and aNySIM, which was developed by the Maritime Research Institute Netherlands. The hydrodynamic loads are based on potential-flow theory, up to the second order. Hydrodynamic coefficients for wave excitation, radiation, and hydrostatic forces are obtained with two different panel codes, WAMIT (developed by the Massachusetts Institute of Technology) and DIFFRAC (developed by MARIN). The semisubmersible platform, developed for the International Energy Agency Wind Task 30 Offshore Code Comparison Collaboration Continuation project is used as a reference platform. Irregular waves are used to compare the behavior of this platform under slow-drift excitation loads. The results from this paper highlight the effects of these loads on semisubmersible-type platforms, which represent a promising solution for the commercial development of the offshore deepwater wind resource.

Gueydon, S.; Duarte, T.; Jonkman, J.; Bayati, I.; Sarmento, A.

2014-03-01T23:59:59.000Z

431

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

E-Print Network [OSTI]

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

432

Ris-R-1352(EN) Models for Wind Turbines  

E-Print Network [OSTI]

Risø-R-1352(EN) Models for Wind Turbines ­ a Collection Andreas Baumgart Gunner C. Larsen, Morten H is to supply new approaches to stability investigations of wind turbines. The author's opinion #12;Contents 1 Preface 5 2 Author's Notes 7 3 Theory of Rods applied to Wind Turbine Blades 9 3

433

Detection of aeroacoustic sound sources on aircraft and wind turbines  

E-Print Network [OSTI]

Detection of aeroacoustic sound sources on aircraft and wind turbines Stefan Oerlemans #12;Detection of aeroacoustic sound sources on aircraft and wind turbines S. Oerlemans Thesis University;DETECTION OF AEROACOUSTIC SOUND SOURCES ON AIRCRAFT AND WIND TURBINES PROEFSCHRIFT ter verkrijging van de

Twente, Universiteit

434

Control of Wind Turbines for Power Regulation and  

E-Print Network [OSTI]

Control of Wind Turbines for Power Regulation and Load Reduction Juan Jose Garcia Quirante Kongens regulation and load reduction and their ensemble in a variable-speed wind turbine. The power regulation aspects of mathematical modelling of wind turbines, and especially the control methods suited for power

435

AIAA-2004-1184 AN AEROACOUSTIC ANALYSIS OF WIND TURBINES*  

E-Print Network [OSTI]

AIAA-2004-1184 1 AN AEROACOUSTIC ANALYSIS OF WIND TURBINES* Philip J. Morris, Lyle N. Long computational aeroacoustic methods that are being applied to predict the noise radiated by wind turbines. Since the wind turbine noise problem is very challenging, only some of the important noise sources and mechanisms

436

A Simplified Morphing Blade for Horizontal Axis Wind Turbines  

E-Print Network [OSTI]

A Simplified Morphing Blade for Horizontal Axis Wind Turbines Weijun WANG , St´ephane CARO, Fouad salinas@hotmail.com The aim of designing wind turbine blades is to improve the power capture ability by adjusting the twist of the blade's root and tip. To evaluate the performance of wind turbine blades

Recanati, Catherine

437

Condition Monitoring of Wind Turbines Based on Amplitude Demodulation  

E-Print Network [OSTI]

Condition Monitoring of Wind Turbines Based on Amplitude Demodulation Yassine Amirat University. In order to make wind turbine reliable and competitive, it is important to reduce the operational-stationary behavior. Index Terms--Wind turbine, Fault Detection, Bearings, Signal Processing, Amplitude Modulation I

Paris-Sud XI, Université de

438

Potential Flow Modelling for Wind Turbines Shane Cline  

E-Print Network [OSTI]

Potential Flow Modelling for Wind Turbines by Shane Cline B.Sc., University of Toledo, 2003 M means, without the permission of the author. #12;ii Potential Flow Modelling for Wind Turbines by Shane potential flow methods are a promising alternative to mainstream wind turbine aerodynamics tools

Victoria, University of

439

Development of Wind Turbines Prototyping Software Under Matlab/Simulink  

E-Print Network [OSTI]

204 1 Development of Wind Turbines Prototyping Software Under Matlab/Simulink® Through present the development of a wind turbine prototyping software under Matlab/Simulink® through and the end of 1999, around 75% of all new grid-connected wind turbines worldwide were installed in Europe [3

Paris-Sud XI, Université de

440

LIGHTNING EXPOSURE OF WIND TURBINES University of Toronto  

E-Print Network [OSTI]

LIGHTNING EXPOSURE OF WIND TURBINES Dale Dolan University of Toronto e-mail: dale@ecf.utoronto.ca Abstract This paper applies the electrogeometric model of lightning exposure to a wind turbine to compute. For a typical 45 m wind turbine, the probability of being struck by a downward negative flash, as predicted

Lehn, Peter W.

Note: This page contains sample records for the topic "offshore wind turbines" 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

Duration Test Report for the Entegrity EW50 Wind Turbine  

SciTech Connect (OSTI)

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

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

2012-12-01T23:59:59.000Z

442

Stochastic Analysis of Wind Turbine Power Curves Edgar Anahua  

E-Print Network [OSTI]

of the wind turbine to its desired power production; and ii) the stochastic force (noise), whichStochastic Analysis of Wind Turbine Power Curves Edgar Anahua Oldenburg 2007 Zur Homepage der Dissertation #12;#12;Stochastic Analysis of Wind Turbine Power Curves Edgar Anahua Von der Fakult¨at f

Peinke, Joachim

443

EFFECTS OF FIBER WAVINESS ON COMPOSITES FOR WIND TURBINE BLADES  

E-Print Network [OSTI]

EFFECTS OF FIBER WAVINESS ON COMPOSITES FOR WIND TURBINE BLADES J.F. Mandell D.D. Samborsky and L Composite materials of interest for wind turbine blades use relatively low cost fibers, resins and processes WORDS: Composite Materials, Fiber Waviness, Compressive Strength #12;1. INTRODUCTION Wind turbine blades

444

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

E-Print Network [OSTI]

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

445

innovati nWind Turbine Design Innovations Drive Industry Transformation  

E-Print Network [OSTI]

innovati nWind Turbine Design Innovations Drive Industry Transformation For more than 20 years. Tackling Turbine Blade Inefficiencies In 1984, NREL researchers began investigating problems with wind turbine blade designs. Inefficiency was a significant barrier to lowering the cost of wind energy

446

Vortex Lattice Modelling of Winglets on Wind Turbine Blades  

E-Print Network [OSTI]

Vortex Lattice Modelling of Winglets on Wind Turbine Blades Mads Døssing Risø-R-1621(EN) Risø Title: Vortex Lattice Modelling of Winglets on Wind Turbine Blades Departments: Wind Energy Department turbines can be increased by the use of winglets without increasing the swept area. This makes them

447

SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE  

E-Print Network [OSTI]

SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE UD - LEWES, DELAWARE January 2011 ` #12;SOUND COMPLIANCE MONITORING FOR THE GAMESA WIND TURBINE AT THE UNIVERSITY OF DELAWARE LEWES, DELAWARE A Gamesa G90 2.0-MW wind turbine operates at the University of Delaware (UD), Lewes campus on a parcel

Firestone, Jeremy

448

IMPLEMENTATION OF WIND TURBINE CONTROLLERS W.E.Leithead  

E-Print Network [OSTI]

IMPLEMENTATION OF WIND TURBINE CONTROLLERS D.J.Leith W.E.Leithead Department of Electronic-speed wind turbines are considered, namely, (1) accommodation of the strongly nonlinear rotor aerodynamics derived and extended to cater for all wind turbine configurations. A rigorous stability analysis

Duffy, Ken

449

Disturbance Control of the Hydraulic Brake in a Wind Turbine  

E-Print Network [OSTI]

Disturbance Control of the Hydraulic Brake in a Wind Turbine Frank Jepsen, Anders Søborg brake in a wind turbine. Brake torque is determined by friction coefficient and clamp force; the latter brake is one1 of the two independent brake systems in a wind turbine. As a consequence of the gearing

Yang, Zhenyu

450

ACOUSTIC STUDY OF THE UD / GAMESA WIND TURBINE PROJECT  

E-Print Network [OSTI]

ACOUSTIC STUDY OF THE UD / GAMESA WIND TURBINE PROJECT LEWES, DELAWARE January 2009 #12;ACOUSTIC STUDY OF THE UNIVERSITY OF DELAWARE / GAMESA WIND TURBINE PROJECT LEWES, DELAWARE Prepared for SUMMARY The University of Delaware (UD), Lewes proposes to locate a Gamesa G90 2.0MW wind turbine

Firestone, Jeremy

451

Mechanisms of amplitude modulation in wind turbine , A. J. Bullmoreb  

E-Print Network [OSTI]

Mechanisms of amplitude modulation in wind turbine noise M. Smitha , A. J. Bullmoreb , M. M. Candb produced by wind turbines is inherently time varying. This amplitude modulation is normally due The environmental noise impact of wind turbine generators has to be assessed when planning new installations

Paris-Sud XI, Université de

452

Dynamic wind turbine models in power system simulation tool  

E-Print Network [OSTI]

Dynamic wind turbine models in power system simulation tool DIgSILENT Anca D. Hansen, Florin Iov Iov, Poul Sørensen, Nicolaos Cutululis, Clemens Jauch, Frede Blaabjerg Title: Dynamic wind turbine system simulation tool PowerFactory DIgSILENT for different wind turbine concepts. It is the second

453

Dynamics and Fatigue Damage of Wind Turbine Rotors  

E-Print Network [OSTI]

6 3 RiS0-Rr512 Dynamics and Fatigue Damage of Wind Turbine Rotors during Steady Operation Peter OF WIND TURBINE ROTORS DURING STEADY OPERATION Peter Hauge Madsen, Sten Frandsen, William E. Holley-carrying capacity of a wind turbine rotor with respect to short-term strength and material fatigue are presented

454

Fast Verification of Wind Turbine Power Summary of Project Results  

E-Print Network [OSTI]

Fast Verification of Wind Turbine Power Curves: Summary of Project Results by: Cameron Brown ­ s equation on high frequency wind turbine measurement data sampled at one sample per second or more. The aim's Nordtank wind turbine at the Risø site, the practical application of this new method was tested

455

Designing Micro Wind Turbines for Portable Power Generation Francois Hogan  

E-Print Network [OSTI]

to the design of a wind turbine rotor. Number of blades The number of blades does not have a significant impact on the efficiency of a wind turbine. We have chosen a two blade design because of ease of fabrication in order) (2) · This two blade micro wind turbine meets the optimal specifications to ensure good efficiency

Barthelat, Francois

456

AIAA980057 RELATING TURBULENCE TO WIND TURBINE BLADE LOADS  

E-Print Network [OSTI]

AIAA­98­0057 RELATING TURBULENCE TO WIND TURBINE BLADE LOADS: PARAMETRIC STUDY WITH MULTIPLE that is most useful in estimating fatigue loads on wind turbine blades. The histograms of rainflow counted turbulence measures---can be used to estimate fatigue loads on wind turbine blades. We first de­ scribe

Sweetman, Bert

457

Load Alleviation on Wind Turbine Blades using Variable Airfoil Geometry  

E-Print Network [OSTI]

Load Alleviation on Wind Turbine Blades using Variable Airfoil Geometry Peter Bjørn Andersen, Mac Loads, Trailing Edge Flaps, PID control, Signal Noise. 1 Introduction Wind turbine blades are subject to 40% when signal noise is added to the control. Keywords: Wind Turbine, Load Alleviation, Fatigue

458

Sparkr Blade Test Centre Modal Analysis of Wind Turbine Blades  

E-Print Network [OSTI]

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

459

Ultimate strength of a large wind turbine blade  

E-Print Network [OSTI]

Ultimate strength of a large wind turbine blade Find Mølholt Jensen Risø-PhD-34(EN) ISBN 978 2008 #12;#12;Author: Find Mølholt Jensen Title: Ultimate strength of a large wind turbine blade contains a study of the structural static strength of wind turbine blades loaded in flap-wise direction

460

Low frequency noise from MW wind turbines --mechanisms of generation  

E-Print Network [OSTI]

Low frequency noise from MW wind turbines -- mechanisms of generation and its modeling Helge MW wind turbines -- mechanisms of generation and its modeling Department: Department of Wind Energy turbine has been simulated with a noise prediction model from NASA in US. Running the model

Note: This page contains sample records for the topic "offshore wind turbines" 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

2/16/2014 Can You Charge Your Mobile With Wind Turbine? -TechTxr http://www.techtxr.com/can-charge-mobile-wind-turbine/ 1/7  

E-Print Network [OSTI]

maximum functionality. Home Wind Generators comparestores.net Looking for Wind Turbines? Compare Latest Turbine? | February 9, 2014 Wind Energy Wind Mill Wind Power Wind Mobile About Wind Power Wind Generator Mobile Generator Mobile Building #12;2/16/2014 Can You Charge Your Mobile With Wind Turbine

Chiao, Jung-Chih

462

Optimizing wind turbine control system parameters  

SciTech Connect (OSTI)

The impending expiration of the levelized period in the Interim Standard Offer Number 4 (ISO4) utility contracts for purchasing wind-generated power in California mandates, more than ever, that windplants be operated in a cost-effective manner. Operating plans and approaches are needed that maximize the net revenue from wind parks--after accounting for operation and maintenance costs. This paper describes a design tool that makes it possible to tailor a control system of a wind turbine (WT) to maximize energy production while minimizing the financial consequences of fatigue damage to key structural components. Plans for code enhancements to include expert systems and fuzzy logic are discussed, and typical results are presented in which the code is applied to study the controls of a generic Danish 15-m horizontal axis wind turbine (HAWT).

Schluter, L.L. [Sandia National Labs., Albuquerque, NM (United States); Vachon, W.A. [Vachon (W.A.) and Associates, Inc., Manchester, MA (United States)

1993-08-01T23:59:59.000Z

463

Land-Based Wind Turbine Transportation and Logistics Barriers and Their Effects on U.S. Wind Markets (Presentation)  

SciTech Connect (OSTI)

The average size of land based wind turbines installed in the United States has increased dramatically over time. As a result wind turbines are facing new transportation and logistics barriers that limit the size of utility scale land based wind turbines that can be deployed in the United States. Addressing these transportation and logistics barriers will allow for even further increases in U.S. turbine size using technologies under development for offshore markets. These barriers are important because larger taller turbines have been identified as a path to reducing the levelized cost of energy for electricity. Additionally, increases in turbine size enable the development of new low and moderate speed markets in the U.S. In turn, wind industry stakeholder support, market stability, and ultimately domestic content and manufacturing competitiveness are potentially affected. In general there is very little recent literature that characterizes transportation and logistics barriers and their effects on U.S. wind markets and opportunities. Accordingly, the objective of this paper is to report the results of a recent NREL study that identifies the barriers, assesses their impact and provides recommendations for strategies and specific actions.

Cotrell, J.; Stehly, T.; Johnson, J.; Roberts, J.O.; Parker, Z.; Scott, G.; Heimiller, D.

2014-05-01T23:59:59.000Z

464

WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE  

E-Print Network [OSTI]

1 WIND TURBINE SITING IN AN URBAN ENVIRONMENT: THE HULL, MA 660 KW TURBINE J. F. Manwell, J. G. Mc turbine at Windmill Point in Hull, Massachusetts represents a high point in the long history of wind, through the installation of a 40 kW Enertech machine in the 1980's to the installation of the new turbine

Massachusetts at Amherst, University of

465

U.S. Department of Energy and SWAY Collaborate on Offshore Wind...  

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

U.S. Department of Energy and SWAY Collaborate on Offshore Wind Demonstration Project U.S. Department of Energy and SWAY Collaborate on Offshore Wind Demonstration Project October...

466

Assessment of Vessel Requirements for the U.S. Offshore Wind...  

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

a very good wind resource and a vibrant supply chain around the offshore oil & gas industry in the North Sea. Figure 5: Annual Offshore Wind Capacity Additions in Europe Source:...

467

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

SciTech Connect (OSTI)

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

Musial, W.; Ram, B.

2010-09-01T23:59:59.000Z

468

Building and Calibration of a FAST Model of the SWAY Prototype Floating Wind Turbine: Preprint  

SciTech Connect (OSTI)

Present efforts to verify and validate aero-hydro-servo-elastic numerical simulation tools that predict the dynamic response of a floating offshore wind turbine are primarily limited to code-to-code comparisons or code-to-data comparisons using data from wind-wave basin tests. In partnership with SWAY AS, the National Renewable Energy Laboratory (NREL) installed scientific wind, wave, and motion measurement equipment on the 1/6.5th-scale prototype SWAY floating wind system to collect data to validate a FAST model of the SWAY design in an open-water condition. Nanyang Technological University (NTU), through a collaboration with NREL, assisted in this validation.

Koh, J. H.; Robertson, A.; Jonkman, J.; Driscoll, F.; Ng, E. Y. K.

2013-09-01T23:59:59.000Z

469

Built-Environment Wind Turbine Roadmap  

SciTech Connect (OSTI)

Although only a small contributor to total electricity production needs, built-environment wind turbines (BWTs) nonetheless have the potential to influence the public's consideration of renewable energy, and wind energy in particular. Higher population concentrations in urban environments offer greater opportunities for project visibility and an opportunity to acquaint large numbers of people to the advantages of wind projects on a larger scale. However, turbine failures will be equally visible and could have a negative effect on public perception of wind technology. This roadmap provides a framework for achieving the vision set forth by the attendees of the Built-Environment Wind Turbine Workshop on August 11 - 12, 2010, at the U.S. Department of Energy's National Renewable Energy Laboratory. The BWT roadmap outlines the stakeholder actions that could be taken to overcome the barriers identified. The actions are categorized as near-term (0 - 3 years), medium-term (4 - 7 years), and both near- and medium-term (requiring immediate to medium-term effort). To accomplish these actions, a strategic approach was developed that identifies two focus areas: understanding the built-environment wind resource and developing testing and design standards. The authors summarize the expertise and resources required in these areas.

Smith, J.; Forsyth, T.; Sinclair, K.; Oteri, F.

2012-11-01T23:59:59.000Z

470

United States- Land Based and Offshore Annual Average Wind Speed at 100 Meters  

Broader source: Energy.gov [DOE]

Full-size, high resolution version of the 100-meter land-based and offshore wind speed resource map.

471

Wind turbine reliability :understanding and minimizing wind turbine operation and maintenance costs.  

SciTech Connect (OSTI)

Wind turbine system reliability is a critical factor in the success of a wind energy project. Poor reliability directly affects both the project's revenue stream through increased operation and maintenance (O&M) costs and reduced availability to generate power due to turbine downtime. Indirectly, the acceptance of wind-generated power by the financial and developer communities as a viable enterprise is influenced by the risk associated with the capital equipment reliability; increased risk, or at least the perception of increased risk, is generally accompanied by increased financing fees or interest rates. This paper outlines the issues relevant to wind turbine reliability for wind turbine power generation projects. The first sections describe the current state of the industry, identify the cost elements associated with wind farm O&M and availability and discuss the causes of uncertainty in estimating wind turbine component reliability. The latter sections discuss the means for reducing O&M costs and propose O&M related research and development efforts that could be pursued by the wind energy research community to reduce cost of energy.

Walford, Christopher A. (Global Energy Concepts. Kirkland, WA)

2006-03-01T23:59:59.000Z

472

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

E-Print Network [OSTI]

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

Hines, Eric

473

Wooden wind turbine blade manufacturing process  

DOE Patents [OSTI]

A wooden wind turbine blade is formed by laminating wood veneer in a compression mold having the exact curvature needed for one side of the blade, following which the other side of the blade is ground flat along its length but twisted with respect to the blade axis.

Coleman, Clint (Warren, VT)

1986-01-01T23:59:59.000Z

474

Root region airfoil for wind turbine  

DOE Patents [OSTI]

A thick airfoil for the root region of the blade of a wind turbine. The airfoil has a thickness in a range from 24%-26% and a Reynolds number in a range from 1,000,000 to 1,800,000. The airfoil has a maximum lift coefficient of 1.4-1.6 that has minimum sensitivity to roughness effects.

Tangler, James L. (Boulder, CO); Somers, Dan M. (State College, PA)

1995-01-01T23:59:59.000Z

475

Redesign of a wind turbine hub  

E-Print Network [OSTI]

The current designs of wind turbine hubs contain many faults. The slew ring bearing that connects the blade to the hub takes on a large bending moment that in many cases causes the joints to fail and the blade to break ...

Hunter-Jones, Bridget I

2014-01-01T23:59:59.000Z

476

Wind Turbine Tribology Seminar - A Recap  

SciTech Connect (OSTI)

Tribology is the science and engineering of interacting surfaces in relative motion. It includes the study and application of the principles of friction, lubrication, and wear. It is an important phenomenon that not only impacts the design and operation of wind turbine gearboxes, but also their subsequent maintenance requirements and overall reliability. With the major growth and increasing dependency on renewable energy, mechanical reliability is an extremely important issue. The Wind Turbine Tribology Seminar was convened to explore the state-of-the-art in wind turbine tribology and lubricant technologies, raise industry awareness of a very complex topic, present the science behind each technology, and identify possible R&D areas. To understand the background of work that had already been accomplished, and to consolidate some level of collective understanding of tribology by acknowledged experts, the National Renewable Energy Laboratory (NREL), Argonne National Laboratory (ANL), and the U.S. Department of Energy (DOE) hosted a wind turbine tribology seminar. It was held at the Renaissance Boulder Flatiron Hotel in Broomfield, Colorado on November 15-17, 2011. This report is a summary of the content and conclusions. The presentations given at the meeting can be downloaded. Interested readers who were not at the meeting may wish to consult the detailed publications listed in the bibliography section, obtain the cited articles in the public domain, or contact the authors directly.

Errichello, R.; Sheng, S.; Keller, J.; Greco, A.

2012-02-01T23:59:59.000Z

477

AWEA Small Wind Turbine Global Market Study  

E-Print Network [OSTI]

Displaced Carbon Dioxide 17 Building-Mounted Turbines 17 Manufacturing 18 The Global Market 21 Solar Summary Table 1 #12;4 | AMERICAn WInD EnERGy ASSOCIATIOn Based on a 2010 AWEA survey of manufacturers and standardized interconnection regulations, and the appropriation and allocation of federal research

Leu, Tzong-Shyng "Jeremy"

478

Power Performance Test Report for the SWIFT Wind Turbine  

SciTech Connect (OSTI)

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

Mendoza, I.; Hur, J.

2012-12-01T23:59:59.000Z

479

| | | | |Monday, July 16, 2012 Three Northeast Ohio offshore wind power projects  

E-Print Network [OSTI]

| | | | |Monday, July 16, 2012 Home Three Northeast Ohio offshore wind power projects secure federal money By SCOTT SUTTELL 1:52 pm, September 9, 2011 Three Northeast Ohio offshore wind power." Three Northeast Ohio offshore wind power projects secure federal money... http

Rollins, Andrew M.

480

Investigations of migratory birds during operation of Horns rev offshore wind  

E-Print Network [OSTI]

Investigations of migratory birds during operation of Horns rev offshore wind farm: Preliminary analyses of bird studies conducted during spring 2004 in relation to the offshore wind farm at Horns Rev of the Horns Rev offshore wind farm - preliminary note on the issue of potential habitat loss. Christensen, T

Note: This page contains sample records for the topic "offshore wind turbines" 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

From%laggard%to%leader:%% Explaining%offshore%wind%developments%in%  

E-Print Network [OSTI]

From%laggard%to%leader:%% Explaining%offshore%wind%developments%in% the%UK% Florian!laggard!to!leader:!Explaining! offshore!wind!developments!in!the!UK! Florian Kern1* , Adrian Smith1 , Chris Shaw1 , Rob Raven2 and Bram for publication in Energy Policy, 19 Feb 2014 Abstract Offshore wind technology has recently undergone rapid

Sussex, University of

482

Effects on birds of an offshore wind park at Horns Rev: Environmental  

E-Print Network [OSTI]

Effects on birds of an offshore wind park at Horns Rev: Environmental impact assessment NERI Report Environmental Research Institute Effects on birds of an offshore wind park at Horns Rev: Environmental impact of an offshore wind park at Horns Rev: Environmental impact assessment Authors: Henning Noer, Thomas Kjær

483

From the SelectedWorks of George R. Parsons Valuing the Visual Disamenity of Offshore Wind  

E-Print Network [OSTI]

From the SelectedWorks of George R. Parsons May 2011 Valuing the Visual Disamenity of Offshore Wind of Offshore Wind Power Projects at Varying Distances from the Shore: An Application on the Delaware Shoreline Andrew D. Krueger, George R. Parsons, and Jeremy Firestone ABSTRACT. Several offshore wind power projects

Delaware, University of

484

Mesoscale modelling for an offshore wind farm Jake Badger*, Rebecca Barthelmie, Sten Frandsen, Merete Bruun Christiansen  

E-Print Network [OSTI]

Mesoscale modelling for an offshore wind farm Jake Badger*, Rebecca Barthelmie, Sten Frandsen for an offshore wind farm in a coastal location. Spatial gradients and vertical profiles between 25 m and 70 m offshore wind farms tend to be placed within the coastal zone, the region within around 50km from

485

A FRESH LOOK AT OFFSHORE WIND OPPORTUNITIES IN MASSACHUSETTS Anthony L. Rogers, Ph.D.  

E-Print Network [OSTI]

A FRESH LOOK AT OFFSHORE WIND OPPORTUNITIES IN MASSACHUSETTS Anthony L. Rogers, Ph.D. James F at Amherst Amherst, MA 01003 The utilization of offshore winds for generating electricity was first proposed that offshore wind development anywhere would be unlikely. More recently, a number of European countries have

Massachusetts at Amherst, University of

486

Fluctuations of offshore wind generation -Statistical modelling , L.E.A. Christensen, H. Madsen  

E-Print Network [OSTI]

Fluctuations of offshore wind generation - Statistical modelling P. Pinson , L.E.A. Christensen, H of power fluctuations at large offshore wind farms has a significant impact on the control and management of the wind power output. This paper con- centrates on the statistical modelling of offshore power fluctu

487

Evaluation of Offshore Wind Simulations with MM5 in the Japanese and Danish Coastal Waters  

E-Print Network [OSTI]

Evaluation of Offshore Wind Simulations with MM5 in the Japanese and Danish Coastal Waters Teruo to evaluate the accuracy of offshore wind simulation with the mesoscale model MM5, long-term simulations to simulate offshore wind conditions in the Japanese coastal waters even using a mesoscale model, compared

Heinemann, Detlev

488

EVALUATION OF MODELS FOR THE VERTICAL EXTRAPOLATION OF WIND SPEED MEASUREMENTS AT OFFSHORE SITES  

E-Print Network [OSTI]

EVALUATION OF MODELS FOR THE VERTICAL EXTRAPOLATION OF WIND SPEED MEASUREMENTS AT OFFSHORE SITES important for offshore wind energy utilisation are discussed and tested: Four models for the surface tested with data from the offshore field measurement Rødsand by extrapolating the measured 10 m wind

Heinemann, Detlev

489

Influences of offshore environmental conditions on wind shear profile parameters in Nantucket Sound  

E-Print Network [OSTI]

Influences of offshore environmental conditions on wind shear profile parameters in Nantucket Sound@ecs.umass.edu ABSTRACT Simultaneous wind resource and oceanographic data are available from an offshore monitoring tower how oceanographic data can be used to aid offshore wind resource assessment evaluations. This study

Massachusetts at Amherst, University of

490

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

491

Offshore Wind Jobs and Economic Development Impact: Four Regional Scenarios (Presentation)  

SciTech Connect (OSTI)

NREL's Jobs and Economic Development Impact (JEDI) Model for Offshore Wind, is a computer tool for studying the economic impacts of fixed-bottom offshore wind projects in the United States. This presentation provides the results of an analysis of four offshore wind development scenarios in the Southeast Atlantic, Great Lakes, Mid-Atlantic, and Gulf of Mexico regions.

Tegen, S.

2014-11-01T23:59:59.000Z

492

LEEDCo awarded $4 million to launch offshore wind development on Lake Erie  

E-Print Network [OSTI]

LEEDCo awarded $4 million to launch offshore wind development on Lake Erie By Teresa Dixon Murray in the United States, the Lake Erie Energy Development Corp. of Cleveland will launch an offshore wind, Democrat of Ohio, who has pushed for such alternative energy projects for years, said offshore wind could

Rollins, Andrew M.

493

THE INFLUENCE OF WAVES ON THE OFFSHORE WIND Bernhard Lange, Jrgen Hjstrup*  

E-Print Network [OSTI]

THE INFLUENCE OF WAVES ON THE OFFSHORE WIND RESOURCE Bernhard Lange, Jørgen Højstrup* Risø National and waves and thus in air-sea interaction in general. For predicting the offshore wind climate'8&7,21 The favourable wind resource at offshore compared to land sites is caused by the very low surface roughness

Heinemann, Detlev

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GEOL 467/667/MAST 667 -GEOLOGICAL ASPECTS OF OFFSHORE WIND PROJECTS **TENTATIVE** COURSE SYLLABUS  

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GEOL 467/667/MAST 667 - GEOLOGICAL ASPECTS OF OFFSHORE WIND PROJECTS **TENTATIVE** COURSE SYLLABUS Description: Investigation of the geological and geotechnical aspects of offshore wind projects. Emphasis will be designed around geological and geotechnical topics that are relevant to the development of offshore wind

Firestone, Jeremy

495

PREDICTION OF WAVES, WAKES AND OFFSHORE WIND THE RESULTS OF THE POW'WOW PROJECT  

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PREDICTION OF WAVES, WAKES AND OFFSHORE WIND ­ THE RESULTS OF THE POW'WOW PROJECT Gregor Giebel: The POWWOW project (Prediction of Waves, Wakes and Offshore Wind, a EU Coordination Action) aimed to develop. Keywords: Wind resource, wave resource, offshore, short-term prediction, wakes 1 Introduction The nearly

Paris-Sud XI, Université de

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AN EVALUATION OF THE WILDLIFE IMPACTS OF OFFSHORE WIND DEVELOPMENT RELATIVE TO FOSSIL FUEL  

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AN EVALUATION OF THE WILDLIFE IMPACTS OF OFFSHORE WIND DEVELOPMENT RELATIVE TO FOSSIL FUEL POWER. Jarvis All Rights Reserved #12;AN EVALUATION OF THE WILDLIFE IMPACTS OF OFFSHORE WIND DEVELOPMENT in offshore wind energy. I would also like to thank my committee members, Dr. Jeremy Firestone

Firestone, Jeremy

497

1 1 1 1 1 1 2 2 Network of offshore wind farms connected by  

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2 33 3 3 1 1 1 1 1 1 2 2 Network of offshore wind farms connected by gas insulated transmission of connecting these offshore wind farms by gas in- sulated transmission lines (GIL) is investigated. Aim, Germany Corresponding author: anja.drews@forwind.de Offshore wind parks in different stages.Green- in op

Heinemann, Detlev

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A FETCH DEPENDENT MODEL OF SEA SURFACE ROUGHNESS FOR OFFSHORE WIND POWER UTILISATION  

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, Resources, Roughness, Coastal Sea Areas, Waves, Rødsand 1 INTRODUCTION Large offshore wind farms are beingA FETCH DEPENDENT MODEL OF SEA SURFACE ROUGHNESS FOR OFFSHORE WIND POWER UTILISATION Bernhard Lange wind conditions of offshore sites, since the higher energy yield has to compensate the additional

Heinemann, Detlev

499

Importance of thermal effects and sea surface roughness for offshore wind resource assessment  

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sites. The first large offshore wind farms are currently being built in several countries in EuropeImportance of thermal effects and sea surface roughness for offshore wind resource assessment National Laboratory, Roskilde, Denmark Abstract The economic feasibility of offshore wind power utilisation

Heinemann, Detlev

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Assessment of Vessel Requirements for the U.S. Offshore Wind...  

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

Wind Sector: Executive Summary Assessment of Vessel Requirements for the U.S. Offshore Wind Sector: Executive Summary Executive summary of the Assessment of Vessel Requirements for...