Powered by Deep Web Technologies
Note: This page contains sample records for the topic "offshore wind turbine" 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

Fixed Offshore Wind Turbines  

Science Journals Connector (OSTI)

In this chapter, a perspective of offshore wind farms, applied concepts for fixed offshore wind turbines, and related statistics are given. One example of a large wind farm, which is successfully operating, is st...

Madjid Karimirad

2014-01-01T23:59:59.000Z

2

Foundations for offshore wind turbines  

Science Journals Connector (OSTI)

...T. Thompson Foundations for offshore wind turbines B. W. Byrne G. T...civil-engineering problems encountered for offshore wind turbines. A critical component...energy suppliers. Foundations|Offshore Wind Turbines|Renewable Energy...

2003-01-01T23:59:59.000Z

3

Towers for Offshore Wind Turbines  

Science Journals Connector (OSTI)

Increasing energy demand coupled with pollution free production of energy has found a viable solution in wind energy. Land based windmills have been utilized for power generation for more than two thousand years. In modern times wind generated power has become popular in many countries. Offshore wind turbines are being used in a number of countries to tap the energy from wind over the oceans and convert to electric energy. The advantages of offshore wind turbines as compared to land are that offshore winds flow at higher speed than onshore winds and the more available space. In some land based settings for better efficiency turbines are separated as much as 10 rotor diameters from each other. In offshore applications where only two wind directions are likely to predominate the distances between the turbines arranged in a line can be shortened to as little as two or four rotor diameters. Today more than a dozen offshore European wind facilities with turbine ratings of 450 kw to 3.6 MW exist offshore in very shallow waters of 5 to 12 m. Compared to onshore wind turbines offshore wind turbines are bigger and the tower height in offshore are in the range of 60 to 80 m. The water depths in oceans where offshore turbines can be located are within 30 m. However as the distance from land increases the costs of building and maintaining the turbines and transmitting the power back to shore also increase sharply. The objective of this paper is to review the parameters of design for the maximum efficiency of offshore wind turbines and to develop types offshore towers to support the wind turbines. The methodology of design of offshore towers to support the wind turbine would be given and the environmental loads for the design of the towers would be calculated for specific cases. The marine corrosion on the towers and the methods to control the corrosion also would be briefly presented. As the wind speeds tend to increase with distance from the shore turbines build father offshore will be able to capture more wind energy. Currently two types of towers are considered. Cylindrical tubular structures and truss type structures. But truss type structures have less weight and flexibility in design. The construction of the offshore towers to harness the wind energy is also presented. The results will include the calculation of wind and wave forces on the tower and the design details for the tower.

V. J. Kurian; S. P. Narayanan; C. Ganapathy

2010-01-01T23:59:59.000Z

4

Offshore Wind Turbines and Their Installation  

Science Journals Connector (OSTI)

Offshore winds tend to be higher, more constant and not disturbed by rough terrain, so there is a large potential for utilizing wind energy near to the sea. Compared with the wind energy converters onland, wind turbine components offshore will subject ... Keywords: renewable energy, wind power generation, offshore wind turbines, offshore installation

Liwei Li; Jianxing Ren

2010-01-01T23:59:59.000Z

5

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.

6

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

7

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network (OSTI)

5-MW Reference Wind Turbine for Offshore System Development.for Floating Offshore Wind Turbines. Tech. no. NREL/CP-500-a Spar-type Floating Offshore Wind Turbine. Thesis. TU Delft

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

8

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

SciTech Connect

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

9

Offshore Wind Turbine Wakes Measured by Sodar  

Science Journals Connector (OSTI)

A ship-mounted sodar was used to measure wind turbine wakes in an offshore wind farm in Denmark. The wake magnitude and vertical extent were determined by measuring the wind speed profile behind an operating turbine, then shutting down the ...

R. J. Barthelmie; L. Folkerts; F. T. Ormel; P. Sanderhoff; P. J. Eecen; O. Stobbe; N. M. Nielsen

2003-04-01T23:59:59.000Z

10

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

11

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

12

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

13

Quantifying the hurricane risk to offshore wind turbines  

Science Journals Connector (OSTI)

...Quantifying the hurricane risk to offshore wind turbines 10.1073/pnas.1111769109...observed in typhoons, but no offshore wind turbines have yet been built in the...Gulf coast is 460 GW (2). Offshore wind turbines in these areas will be at...

Stephen Rose; Paulina Jaramillo; Mitchell J. Small; Iris Grossmann; Jay Apt

2012-01-01T23:59:59.000Z

14

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

15

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

16

Investigation of Wind Turbine Rotor Concepts for Offshore Wind Farms  

Science Journals Connector (OSTI)

Current plans in offshore wind energy developments call for further reduction of cost of energy. In order to contribute to this goal, several wind turbine rotor concepts have been investigated. Assuming the future offshore wind turbines will operate only in the offshore wind farms, the rotor concepts are not only evaluated for their stand-alone performances and their potential in reducing the loads, but also for their performance in an offshore wind farm. In order to do that, the 10MW reference wind turbine designed in Innwind.EU project is chosen as baseline. Several rotor parameters have been modified and their influences are investigated for offshore wind turbine design purposes. This investigation is carried out as a conceptual parametrical study. All concepts are evaluated numerically with BOT (Blade optimisation tool) software in wind turbine level and with Farmflow software in wind farm level for two wind farm layouts. At the end, all these concepts are compared with each other in terms of their advantages and disadvantages.

Özlem Ceyhan; Francesco Grasso

2014-01-01T23:59:59.000Z

17

Dynamic characteristics analysis of the offshore wind turbine blades  

Science Journals Connector (OSTI)

The topic of offshore wind energy is attracting more and more attention ... . The blades are the key components of offshore wind turbines, and their dynamic characteristics directly determine the effectiveness of...

Jing Li; Jianyun Chen; Xiaobo Chen

2011-03-01T23:59:59.000Z

18

Lateral and Axial Capacity of Monopiles for Offshore Wind Turbines  

Science Journals Connector (OSTI)

Offshore wind has enormous worldwide potential to generate increasing ... are considered to be viable in supporting larger offshore wind turbines in shallow to medium depth waters. In ... of axial and lateral loa...

Aliasger Haiderali; Ulas Cilingir; Gopal Madabhushi

2013-09-01T23:59:59.000Z

19

Foundations for offshore wind turbines  

Science Journals Connector (OSTI)

...wind farms, although supplying green energy, tend to provoke some objections...wind farms, although supplying 'green energy', tend to provoke some objections...wind farms, although supplying `green energy', tend to provoke some objections...

2003-01-01T23:59:59.000Z

20

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

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

Long-Term Dynamic Monitoring of an Offshore Wind Turbine  

Science Journals Connector (OSTI)

Future Offshore Wind Turbines will be hardly accessible; therefore, in ... modes of the foundation and tower structures. Wind turbines are complex structures and their dynamics vary ... track changes in the dynam...

Christof Devriendt; Filipe Magalhães…

2013-01-01T23:59:59.000Z

22

Offshore Wind Turbines - Estimated Noise from Offshore Wind Turbine, Monhegan Island, Maine: Environmental Effects of Offshore Wind Energy Development  

SciTech Connect

Deep C Wind, a consortium headed by the University of Maine will test the first U.S. offshore wind platforms in 2012. In advance of final siting and permitting of the test turbines off Monhegan Island, residents of the island off Maine require reassurance that the noise levels from the test turbines will not disturb them. Pacific Northwest National Laboratory, at the request of the University of Maine, and with the support of the U.S. Department of Energy Wind Program, modeled the acoustic output of the planned test turbines.

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

2010-11-23T23:59:59.000Z

23

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

24

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

25

Dynamic simulation on collision between ship and offshore wind turbine  

Science Journals Connector (OSTI)

By using ABAQUS/Explicit, the dynamic process of an offshore wind turbine(OWT) stricken by a ship of 5000DWT...

Hongyan Ding ???; Qi Zhu ? ?; Puyang Zhang ???

2014-02-01T23:59:59.000Z

26

Condition Monitoring of Offshore Wind Turbines.  

E-Print Network (OSTI)

?? The growing interest around offshore wind power, providing at the same time better wind conditions and fewer visual or environmental impacts, has lead many… (more)

Wisznia, Roman

2013-01-01T23:59:59.000Z

27

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.

28

Investigation on installation of offshore wind turbines  

Science Journals Connector (OSTI)

Wind power has made rapid progress and should ... interest in renewable energy and clean energy. Offshore wind energy resources have attracted significant attention, as, compared with land-based wind energy resou...

Wei Wang; Yong Bai

2010-06-01T23:59:59.000Z

29

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network (OSTI)

September 2007. 5. "Hywind – the World’s First Full-scaleOffshore/Hywind/Pages/HywindPuttingWindPowerToTheTest. aspx4 Figure 1.3: Hywind concept floating wind turbine [

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

30

Condition Monitoring Benefit for Operation Support of Offshore Wind Turbines  

Science Journals Connector (OSTI)

As more offshore wind parks are commissioned, the focus will inevitably ... case, both short-term risks associated with wind turbine component assemblies, and long-term risks related...

Dr. Sebastian Thöns; Dr. David McMillan

2014-01-01T23:59:59.000Z

31

Risk of collision between service vessels and offshore wind turbines  

Science Journals Connector (OSTI)

Offshore wind farms are growing in size and are situated farther and farther away from shore. The demand for service visits to transfer personnel and equipment to the wind turbines is increasing, and safe operation of the vessels is essential. Currently, collisions between service vessels and offshore wind turbines are paid little attention to in the offshore wind energy industry. This paper proposes a risk assessment framework for such collisions and investigates the magnitude of the collision risk and important risk-influencing factors. The paper concludes that collisions between turbines and service vessels even at low speed may cause structural damage to the turbines. There is a need for improved consideration of this kind of collision risk when designing offshore wind turbines and wind farms.

Lijuan Dai; Sören Ehlers; Marvin Rausand; Ingrid Bouwer Utne

2013-01-01T23:59:59.000Z

32

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

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

EA-1792: University of Maine's Deepwater Offshore Floating Wind EA-1792: 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 Turbine Testing and Demonstration Project, Gulf of Maine Summary This EA evaluates the environmental impacts of a proposal to support research on floating offshore wind turbine platforms. This project would support the mission, vision, and goals of DOE's Office of Energy Efficiency and Renewable Energy Wind and Water Power Program to improve performance, lower costs, and accelerate deployment of innovative wind power technologies. Development of offshore wind energy technologies would help the nation reduce its greenhouse gas emissions, diversify its energy supply, provide cost-competitive electricity to key coastal regions, and

33

Aeroelastic analysis of an offshore wind turbine.  

E-Print Network (OSTI)

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

Fossum, Peter Kalsaas

2012-01-01T23:59:59.000Z

34

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...

35

Engineering Challenges for Floating Offshore Wind Turbines  

SciTech Connect

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

36

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

37

Feasibility study of offshore wind turbine substructures for southwest offshore wind farm project in Korea  

Science Journals Connector (OSTI)

Abstract Korea has huge potential for offshore wind energy and the first Korean offshore wind farm has been initiated off the southwest coast. With increasing water depth, different substructures of the offshore wind turbine, such as the jacket and multipile, are the increasing focus of attention because they appear to be cost-effective. However, these substructures are still in the early stages of development in the offshore wind industry. The aim of the present study was to design a suitable substructure, such as a jacket or multipile, to support a 5 MW wind turbine in 33 m deep water for the Korean Southwest Offshore Wind Farm. This study also aimed to compare the dynamic responses of different substructures including the monopile, jacket and multipile and evaluate their feasibility. We therefore performed an eigenanalysis and a coupled aero-hydro-servo-elastic simulation under deterministic and stochastic conditions in the environmental conditions in Korea. The results showed that the designed jacket and multipile substructures, together with the modified monopile, were well located at soft–stiff intervals, where most modern utility-scale wind turbine support structures are designed. The dynamic responses of the different substructures showed that of the three substructures, the performance of the jacket was very good. In addition, considering the simple configuration of the multipile, which results in lower manufacturing cost, this substructure can provide another possible solution for Korean’s first offshore wind farm. This study provides knowledge that can be applied for the deployment of large-scale offshore wind turbines in intermediate water depths in Korea.

Wei Shi; Jonghoon Han; Changwan Kim; Daeyong Lee; Hyunkyoung Shin; Hyunchul Park

2015-01-01T23:59:59.000Z

38

Dynamic analysis of tension leg platform for offshore wind turbine support as fluid-structure interaction  

Science Journals Connector (OSTI)

Tension leg platform (TLP) for offshore wind turbine support is a new type structure in wind energy utilization. The strong-interaction method is ... and the dynamic characteristics of the TLP for offshore wind turbine

Hu Huang ? ?; She-rong Zhang ???

2011-03-01T23:59:59.000Z

39

Method for computing efficient electrical indicators for offshore wind turbine monitoring  

E-Print Network (OSTI)

by offshore deployment of wind farms. The offshore turbines have much lower accessibility(1) so maintenanceMethod 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

Paris-Sud XI, Université de

40

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

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

Correction for Rose et al., Quantifying the hurricane risk to offshore wind turbines  

Science Journals Connector (OSTI)

...Rose et al., Quantifying the hurricane risk to offshore wind turbines 10.1073/pnas.1211974109 SUSTAINABILITY SCIENCE...Correction for “Quantifying the hurricane risk to offshore wind turbines,” by Stephen Rose, Paulina Jaramillo, Mitchell...

2012-01-01T23:59:59.000Z

42

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

43

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 icing for offshore Wind Turbines ? · Wherever there is sea icing ! · Temperature bellow zero degree Structures Outline · Introduction · Wind Turbine Operational Conditions · Wind Turbine Operation under

Nørvåg, Kjetil

44

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

45

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

46

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

47

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 models to establish extreme loads associated with return periods on the order of 20­50 years. Distribu- tions for the extreme mudline bending moment are established using parametric models. Long

Manuel, Lance

48

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

49

The effect of ocean waves on offshore wind turbines  

Science Journals Connector (OSTI)

The Ocean has a varying surface roughness where the roughness length is determined by the characteristics of the waves. In this paper, a method is established where the roughness length of the ocean is calculated from the wind speed and the fetch length. The fetch length depends on the wind direction and a case study is performed for a wind turbine exposed to wind blowing in two opposite directions: from the shore and the sea. For each case, the vertical wind speed distribution is calculated in order to study the influence that the direction of the wind has on the annual energy production. The potential for using a site-specific offshore turbine design, dependent on the prevailing wind direction, is also explored.

T. Thorsen; H. Naeser

2002-01-01T23:59:59.000Z

50

The Aerodynamics and Near Wake of an Offshore Floating Horizontal Axis Wind Turbine.  

E-Print Network (OSTI)

??Offshore floating wind turbines represent the future of wind energy. However, significant challenges must be overcome before these systems can be widely used. Because of… (more)

Sebastian, Thomas

2012-01-01T23:59:59.000Z

51

Hybrid Offshore Wind and Tidal Turbine Power System to Compensate for Fluctuation (HOTCF)  

Science Journals Connector (OSTI)

The hybrid system proposed in this study involves an offshore-wind turbine and a complementary tidal turbine that supplies grid power. The hybrid wind–tidal system consistently combines wind power and tidal power...

Mohammad Lutfur Rahman; Shunsuke Oka; Yasuyuki Shirai

2011-01-01T23:59:59.000Z

52

Airfoil family design for large offshore wind turbine blades  

Science Journals Connector (OSTI)

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

B Méndez; X Munduate; U San Miguel

2014-01-01T23:59:59.000Z

53

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

54

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

55

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

56

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

57

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

E-Print Network (OSTI)

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

Sweetman, Bert

58

Multi-criteria assessment of offshore wind turbine support structures  

Science Journals Connector (OSTI)

Wind power, especially offshore, is considered one of the most promising sources of ‘clean’ energy towards meeting the EU and UK targets for 2020 and 2050. Deployment of wind turbines in constantly increasing water depths has raised the issue of the appropriate selection of the most suitable support structures’ options. Based on experience and technology from the offshore oil and gas industry, several different configurations have been proposed for different operational conditions. This paper presents a methodology for the systematic assessment of the selection of the most preferable, among the different configurations, support structures for offshore wind turbines, taking into consideration several attributes through the widely used multi-criteria decision making method TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) for the benchmarking of those candidate options. An application comparing a monopile, a tripod and a jacket, for a reference 5.5 MW wind turbine and a reference depth of 40 m, considering multiple engineering, economical and environmental attributes, will illustrate the effectiveness of the proposed methodology.

E. Lozano-Minguez; A.J. Kolios; F.P. Brennan

2011-01-01T23:59:59.000Z

59

A floating platform of concrete for offshore wind turbine  

Science Journals Connector (OSTI)

A floating platform concept is introduced in this paper for offshore wind turbine. A vertical cylinder on the top of an elliptical sphere forms the principal configuration of the platform. The analysis of the dynamic performance of an example platform with 5 MW wind turbine by means of the well-established linear theory for the dynamics of marine constructions in waves shows that the platform is able to secure the normal function of the wind turbine in waves up to rough sea state and has the required dynamic performance for survival in extreme waves by adopting a survival ballast condition. An important feature of this concept is that reinforced concrete can be used as cost-efficient construction material so that the service life several times longer than similar steel constructions can be obtained despite of the marine corrosive and erosive environment. Thus this kind of platform can become competitive in the economical sustainable and environment-friendly aspect.

Jianbo Hua

2011-01-01T23:59:59.000Z

60

Seismic fragility analysis of 5 MW offshore wind turbine  

Science Journals Connector (OSTI)

Abstract Considering nonlinear soil–pile interaction, seismic fragility analysis of offshore wind turbine was performed. Interface between ground soils and piles were modeled as nonlinear spring elements. Ground excitation time histories were applied to spring boundaries. Two methods of applying ground motion were compared. Different time histories from free field analysis were applied to each boundary in the first loading plan (A). They were compared with the second loading plan (B) in which the same ground motion is applied to all boundaries. Critical displacement for wind turbine was proposed by using push-over analysis. Both the stress based and the displacement based fragility curves were obtained using dynamic responses for different peak ground accelerations (PGAs). In numerical example, it was shown that seismic responses from loading plan A are bigger than from plan B. It seems that the bigger ground motion at surface can cause less response at wind turbine due to phase difference between ground motions at various soil layers. Finally, it can be concluded that layer by layer ground motions from free field analysis should be used in seismic design of offshore wind turbine.

Dong Hyawn Kim; Sang Geun Lee; Il Keun Lee

2014-01-01T23:59:59.000Z

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

Identifying Structural Parameters of an Idling Offshore Wind Turbine Using Operational Modal Analysis  

Science Journals Connector (OSTI)

The design of modern day offshore wind turbines (OWTs) relies on numerical models, which ... needed for determining the design life of the turbines. The dynamic behavior, and thus the lifetime, of the turbines ar...

Paul L. C. van der Valk; Marco G. L. Ogno

2014-01-01T23:59:59.000Z

62

DC Connected Hybrid Offshore-Wind and Tidal Turbine Generation System  

Science Journals Connector (OSTI)

“Hybrid Offshore-wind and Tidal Turbine” (HOTT) generation system (Rahman and ... interconnecting method for a DC side cluster of wind and tidal turbine generators system are proposed. This method can be achieved...

Mohammad Lutfur Rahman; Yasuyuki Shirai

2010-01-01T23:59:59.000Z

63

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

64

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

65

offshore wind farm  

Science Journals Connector (OSTI)

offshore wind farm, wind farm [‘Wind park’ which one may find on the ... engineers and should not be used. A wind farm consists of a network of wind turbines] ? Windkraftanlage f, Windpark m; Offshore

2014-08-01T23:59:59.000Z

66

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, for this turbine, a major source of response variability for both the blade and tower arises from blade pitch

Manuel, Lance

67

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

68

Suction caissons in sand as tripod foundations for offshore wind turbines.  

E-Print Network (OSTI)

??[Truncated abstract] The demand for offshore wind turbines is increasing in densely populated areas, such as Europe. These constructions are typically founded on a gravity… (more)

Senders, Marc

2009-01-01T23:59:59.000Z

69

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

70

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

SciTech Connect

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

71

Sensitivity analysis of offshore wind turbine tower caused by the external force  

Science Journals Connector (OSTI)

Generally, faster wind speeds are observed in coastal areas than ... inland areas. Therefore, for the development of offshore wind energy, more electricity is expected to be generated using wind turbines. This al...

Namhyeong Kim; Jung Woon Jin

2013-07-01T23:59:59.000Z

72

Dynamic Analysis of an Offshore Wind Turbine Drivetrain on a Floating Support  

Science Journals Connector (OSTI)

This paper presents a multi-body model for the study of the non stationary dynamic behaviour of an off-shore wind turbine power train. The problem studied is an off-shore implementation with seafloor depths ar...

Fernando Viadero…

2012-01-01T23:59:59.000Z

73

Study of auxiliary power systemsfor offshore wind turbines.  

E-Print Network (OSTI)

?? Until today the offshore wind power has grown in a steady pace and many new wind farms are being constructed around the globe. An… (more)

Berggren, Joakim

2013-01-01T23:59:59.000Z

74

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...

75

Removing the Influence of Rotor Harmonics for Improved Monitoring of Offshore Wind Turbines  

Science Journals Connector (OSTI)

The ability to identify the dynamic properties of offshore wind turbines allows validating and updating numerical tools, which ... of the machine. However, modal identification of turbines in operating conditions...

S. Manzato; C. Devriendt; W. Weijtjens…

2014-01-01T23:59:59.000Z

76

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

77

Dependence of offshore wind turbine fatigue loads on atmospheric stratification  

Science Journals Connector (OSTI)

The stratification of the atmospheric boundary layer (ABL) is classified in terms of the M-O length and subsequently used to determine the relationship between ABL stability and the fatigue loads of a wind turbine located inside an offshore wind farm. Recorded equivalent fatigue loads, representing blade-bending and tower bottom bending, are combined with the operational statistics from the instrumented wind turbine as well as with meteorological statistics defining the inflow conditions. Only a part of all possible inflow conditions are covered through the approximately 8200 hours of combined measurements. The fatigue polar has been determined for an (almost) complete 360° inflow sector for both load sensors, representing mean wind speeds below and above rated wind speed, respectively, with the inflow conditions classified into three different stratification regimes: unstable, neutral and stable conditions. In general, impact of ABL stratification is clearly seen on wake affected inflow cases for both blade and tower fatigue loads. However, the character of this dependence varies significantly with the type of inflow conditions – e.g. single wake inflow or multiple wake inflow.

K S Hansen; G C Larsen; S Ott

2014-01-01T23:59:59.000Z

78

15 - Offshore environmental loads and wind turbine design: impact of wind, wave, currents and ice  

Science Journals Connector (OSTI)

Abstract: In order to design offshore wind turbines, an engineer must understand the environmental loads that are imposed on the structure. This chapter describes the wind, wave, current and ice loading phenomena and how to translate the environmental characteristics to design loads against which the structure must be designed.

J. Van Der Tempel; N.F.B. Diepeveen; W.E. De Vries; D. Cerda Salzmann

2011-01-01T23:59:59.000Z

79

Will 10 MW Wind Turbines Bring Down the Operation and Maintenance Cost of Offshore Wind Farms?  

Science Journals Connector (OSTI)

Abstract Larger wind turbines are believed to be advantageous from an investment and installation perspective, since costs for installation and inner cabling are dependent mainly on the number of wind turbines and not their size. Analogously, scaling up the turbines may also be argued to be advantageous from an operation and maintenance (O&M) perspective. For a given total power production of the wind farm, larger wind turbines give a smaller number of individual machines that needs to be maintained and could therefore give smaller O&M costs. However, the O&M costs are directly dependent on how failure rates, spare part costs, and time needed by technicians to perform each maintenance task and will develop for larger wind turbines. A simulation study is carried out with a discrete-event simulation model for the operational phase of an offshore wind farm, comparing the O&M costs of a wind farm consisting of 5 MW turbines with a wind farm consisting of 10 MW turbines. Simulation results confirm that O&M costs decrease when replacing two 5 MW turbines by one 10 MW turbine, if the total production capacity and all other parameters are kept equal. However, whether larger wind turbines can contribute to a reduction of cost of energy from an O&M perspective is first and foremost dependent on how the failure rates and maintenance durations for such wind turbines will develop compared to 5 MW wind turbines. Based on the results of this analysis, it is concluded that higher failure rates and maintenance durations rapidly are counterbalancing the benefits of larger wind turbines.

Matthias Hofmann; Iver Bakken Sperstad

2014-01-01T23:59:59.000Z

80

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

SciTech Connect

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

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

DOE to Develop Multi-Megawatt Offshore Wind Turbine with General Electric |  

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

to Develop Multi-Megawatt Offshore Wind Turbine with General to Develop Multi-Megawatt Offshore Wind Turbine with General Electric DOE to Develop Multi-Megawatt Offshore Wind Turbine with General Electric March 9, 2006 - 11:44am Addthis Contract Valued at $27 million, supports President Bush's Advanced Energy Initiative WASHINGTON, D.C. - The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) in Golden, Colorado, has signed a $27 million, multi-year contract with the General Electric Company (GE) to develop a new offshore wind power system over the next several years. Approximately $8 million of the offshore wind project will be cost-shared by DOE. "Offshore wind technology, another aspect of President Bush's Advanced Energy Initiative, can reduce our dependence on foreign energy sources as

82

Development of High-Capacity Desalination Plant Driven by Offshore Wind Turbine  

Science Journals Connector (OSTI)

This paper presents a development of the desalination plant based on the concept of the Wind Energy Marine Unit (WEMU) which is the high-capacity offshore wind turbine with the floating rotor. The great potential...

Valery V. Cheboxarov; Victor V. Cheboxarov

2009-01-01T23:59:59.000Z

83

Floating axis wind turbines for offshore power generation—a conceptual study  

Science Journals Connector (OSTI)

The cost of energy produced by offshore wind turbines is considered to be higher than land based ones because of the difficulties in construction, operation and maintenance on offshore sites. To solve the problem, we propose a concept of a wind turbine that is specially designed for an offshore environment. In the proposed concept, a floater of revolutionary shape supports the load of the wind turbine axis. The floater rotates with the turbine and the turbine axis tilts to balance the turbine thrust, buoyancy and gravity. The tilt angle is passively adjustable to wind force. The angle is 30° at rated power. The simplicity of the system leads to further cost reduction of offshore power generation.

Hiromichi Akimoto; Kenji Tanaka; Kiyoshi Uzawa

2011-01-01T23:59:59.000Z

84

Maine Project Launches First Grid-Connected Offshore Wind Turbine in the  

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

Maine Project Launches First Grid-Connected Offshore Wind Turbine Maine Project Launches First Grid-Connected Offshore Wind Turbine in the U.S. Maine Project Launches First Grid-Connected Offshore Wind Turbine in the U.S. May 31, 2013 - 11:00am Addthis News Media Contact (202) 586-4940 WASHINGTON - The Energy Department today recognized the nation's first grid-connected offshore floating wind turbine prototype off the coast of Castine, Maine. Led by the University of Maine, this project represents the first concrete-composite floating platform wind turbine to be deployed in the world - strengthening American leadership in innovative clean energy technologies that diversify the nation's energy mix with more clean, domestic energy sources. "Developing America's vast renewable energy resources is an important part of the Energy Department's all-of-the-above strategy to pave the way

85

First U.S. Grid-Connected Offshore Wind Turbine Installed Off the Coast of Maine  

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

Castine, Maine - The University of Maine's Advanced Structures and Composites Center partnered with Maine Maritime Academy and Cianbro to launch a 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 VolturnUS 1:8 became the first grid-connected floating offshore wind turbine in the Americas.

86

The right size matters: Investigating the offshore wind turbine market equilibrium  

Science Journals Connector (OSTI)

Abstract Although early experiences indicate that the maturity of deployed technology might not be sufficient for operating wind farms in large scale far away from shore, the rapid development of offshore wind energy is in full progress. Driven by the demand of customers and the pressure to keep pace with competitors, offshore wind turbine manufacturers continuously develop larger wind turbines instead of improving the present ones which would ensure reliability in harsh offshore environment. Pursuing the logic of larger turbines generating higher energy yield and therefore achieving higher efficiency, this trend is also supported by governmental subsidies under the expectation to bring down the cost of electricity from offshore wind. The aim of this article is to demonstrate that primarily due to the limited wind resource upscaling offshore wind turbines beyond the size of 10 MW (megawatt) is not reasonable. Applying the planning methodology of an offshore wind project developer to a case study wind farm in the German North Sea and assessing energy yield, lifetime project profitability and levelized cost of electricity substantiate this thesis. This is highly interesting for all stakeholders in the offshore wind industry and questions current subsidy policies supporting projects for developing turbines up to 20 MW.

Nikolaus Ederer

2014-01-01T23:59:59.000Z

87

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

88

Coupled Dynamic Analysis of Multiple Unit Floating Offshore Wind Turbine  

E-Print Network (OSTI)

MUFOWT analysis tool is able to compute any type of floating platform with various kinds of horizontal axis wind turbines (HAWT). Individual control of each turbine is also available and the different structural properties of tower and blades can...

Bae, Yoon Hyeok

2013-04-23T23:59:59.000Z

89

New Modeling Tool Analyzes Floating Platform Concepts for Offshore Wind Turbines (Fact Sheet)  

SciTech Connect

Researchers at the National Renewable Energy Laboratory (NREL) developed a new complex modeling and analysis tool capable of analyzing floating platform concepts for offshore wind turbines. The new modeling tool combines the computational methodologies used to analyze land-based wind turbines with the comprehensive hydrodynamic computer programs developed for offshore oil and gas industries. This new coupled dynamic simulation tool will enable the development of cost-effective offshore technologies capable of harvesting the rich offshore wind resources at water depths that cannot be reached using the current technology.

Not Available

2011-02-01T23:59:59.000Z

90

Hunting Hurricanes…and Data to Help Build Better Offshore Wind Turbines  

Office of Energy Efficiency and Renewable Energy (EERE)

Hurricane season is officially here. This year, the National Oceanic and Atmospheric Administration (NOAA) is not only tracking storms, but also important data that will provide critical insights which could lead to stronger offshore wind turbines and components capable of withstanding hurricane conditions. Learn more about how NOAA and the Energy Department are working together to help accelerate deployment of offshore wind technologies.

91

A Fault Tolerant Control Approach to Sustainable Offshore Wind Turbines  

Science Journals Connector (OSTI)

The main challenges for the deployment of wind turbine systems are to maximise the amount of good quality electrical power extracted from wind energy. This must be ensured over a ... to maintain system sustainabi...

Montadher Sami Shaker; Ron J. Patton

2014-01-01T23:59:59.000Z

92

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

SciTech Connect

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

93

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

94

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

95

Thermally Sprayed SiC Coatings for Offshore Wind Turbine Bearing Applications  

Science Journals Connector (OSTI)

Tribological tests were conducted on thermally sprayed silicon carbide (SiC) coatings to investigate its potential on reducing wear in offshore wind turbine bearings. The tests were carried out under...3Al5O12) o...

F. Mubarok; S. Armada; I. Fagoaga; N. Espallargas

2013-12-01T23:59:59.000Z

96

Interface behavior of grouted connection on monopile wind turbine offshore structure  

Science Journals Connector (OSTI)

The interface behavior of a concrete grouted connection is studied in a monopile wind turbine offshore structure. The grouted connection between transition piece ... investigating the behavior of grouted connecti...

Ki-Du Kim; Pasin Plodpradit; Bum-Joon Kim…

2014-09-01T23:59:59.000Z

97

Study on the marine growth effect on the dynamic response of offshore wind turbines  

Science Journals Connector (OSTI)

Jacket foundation is regarded as a suitable solution for wind turbines in the intermediate water depths ranging from ... Marine growth is found to influence loading of offshore structures by increasing tube diame...

Wei Shi; Hyun-Chul Park; Jae-Ha Baek…

2012-07-01T23:59:59.000Z

98

Sustainability Assessment and Relevant Indicators of Steel Support Structures for Offshore Wind Turbines  

Science Journals Connector (OSTI)

Environmental and operational loads are design drivers for steel support structures of Offshore Wind Turbines. Besides common design and installation factors a ... developed for steel constructions of renewable f...

Peter Schaumann; Anne Bechtel

2014-01-01T23:59:59.000Z

99

Modeling of offshore wind turbine noise radiation and propagation  

Science Journals Connector (OSTI)

Noisegenerated by offshore wind turbine and support structure can radiate and propagate through the air water and sediment. Predicting noise levels around wind turbinestructures at sea is required for the estimation of effects of the noise on marine life. To predict radiated noise we used a finite element analysis(FEA) of a cylindrical shell model of a monopile structure. In the finite element modeling transient modal dynamic analysis and steady state dynamic analysis (direct and modal) were implemented to simulate both construction and operational noise. The effect of various sediment types and foundation designs are investigated. The FEA package used was ABAQUS version 6.10. The output of the FEAanalysis is used as starting field for acoustic propagation models such as PE to produce long range predictions. We present predictions of particle velocity at the structure-acoustic medium interface and sound pressure level as function of frequency at various distances from the structure. Laboratory experiments using scale models of the cylindrical shell have been carried out to verify the noise predictions. Comparison of the FEAmodel results and experimental data will be presented.

Huikwan Kim; Gopu R. Potty; James H. Miller; Christopher Baxter

2011-01-01T23:59:59.000Z

100

International Effort Advances Offshore Wind Turbine Design Codes  

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

For the past several years, DOE's National Renewable Energy Laboratory has teamed with the Fraunhofer Institute for Wind Energy and Energy System Technology in Germany to lead an international effort under the International Energy Agency’s Task 30 to improve the tools used to design offshore wind energy systems.

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

EA-1792-S1: University of Maine's Deepwater Offshore Floating Wind Turbine  

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

92-S1: University of Maine's Deepwater Offshore Floating Wind 92-S1: University of Maine's Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project - Castine Harbor Test Site EA-1792-S1: University of Maine's Deepwater Offshore Floating Wind Turbine Testing and Demonstration Project - Castine Harbor Test Site SUMMARY This Supplemental EA in a 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). PUBLIC COMMENT OPPORTUNITIES No public comment opportunities at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD

102

Voltage and Frequency Control in Offshore Wind Turbines Connected to Isolated Oil Platform Power Systems  

Science Journals Connector (OSTI)

Offshore wind turbines have potential to supply offshore oil and gas platforms in the North Sea with electric energy. For remote located facilities it is attractive to pursue a solution where the wind turbines and oil platform operate in an isolated system. To study the operational properties of a system with these characteristics is necessary to identify possible advantages and disadvantages. This paper demonstrates how added voltage and frequency control in wind turbines equipped with full power electronic converters can improve the voltage and frequency stability in offshore oil and gas installations. The work is based on an electrical simulation model built in the PSCAD software. In the proposed transient simulation scenarios, the voltage dip is reduced from 16% to 6%, while the frequency overshoot is reduced from 97% to 25%. These are significant improvements that should be taken into consideration when offshore wind power is evaluated as power supply to oil installations.

Atle Rygg Årdal; Tore Undeland; Kamran Sharifabadi

2012-01-01T23:59:59.000Z

103

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

SciTech Connect

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

104

Experimental and computational damping estimation of an offshore wind turbine on a monopile foundation  

Science Journals Connector (OSTI)

Abstract In this study, Operational Modal Analysis (OMA) is used to identify the damping value of the fundamental for-aft (FA) mode of an Offshore Wind Turbine (OWT) using both real life measurements and simulations. Estimations of the total damping of an offshore wind turbine (taking into account the effects of the aerodynamic, hydrodynamic and soil loads) give a quantitative view of the stability characteristics of the wind turbine. Two different test cases including an overspeed stop and ambient excitation have been considered. The experimental data has been obtained during a measurement campaign on an offshore wind turbine in the Belgian North Sea and the results are compared with the numerical simulations which have been carried out in HAWC2.

R. Shirzadeh; C. Devriendt; M.A. Bidakhvidi; P. Guillaume

2013-01-01T23:59:59.000Z

105

Basic Integrative Models for Offshore Wind Turbine Systems  

E-Print Network (OSTI)

wind turbine were studied using a variety of design load, and soil conditions scenarios. Aerodynamic thrust loads were estimated using the FAST Software developed by the U.S Department of Energy’s National Renewable Energy Laboratory (NREL...

Aljeeran, Fares

2012-07-16T23:59:59.000Z

106

Offshore Wind Development 2011  

Science Journals Connector (OSTI)

Growth in the European offshore market will depend principally on the ability ... manufacturing capacity, and the development of specialized offshore wind turbines with their own manufacturing supply chain are...

Mark J. Kaiser; Brian F. Snyder

2012-01-01T23:59:59.000Z

107

Challenges in the reliability and maintainability data collection for offshore wind turbines  

Science Journals Connector (OSTI)

Wind energy is abundantly available both onshore and offshore. As a response to the present climate crisis focus on wind energy is increasing due to its renewable and environmentally friendly characteristics. Due to social and political reasons the trend has been shifted largely from onshore to offshore wind farms. Offshore wind energy production faces a wide range of new challenges in design, development, manufacturing, installation, and maintenance and operation. The need, objectives, method, benefits, and application of a proposed reliability and maintainability database are identified in this paper. In the offshore oil and gas industry the OREDA concept for data collection has been running for more than 25 years. Therefore it will be briefly described what is considered to be the state of the art in this industry when it comes to data collection. Potential challenges and issues pertaining to the reliability and maintainability data collection of offshore wind turbines are outlined and categorized. The architecture of the proposed database is illustrated. The main building blocks of the database are briefly described and their possible effects on the reliability and maintainability of offshore wind turbines are highlighted. It is expected that the realization of the proposed database will open a new vista of knowledge in understanding the real behavior of offshore wind turbines in the marine environment. Another expectation is the benefits it will bring to the technological areas ranging from design to operation.

Z. Hameed; J. Vatn; J. Heggset

2011-01-01T23:59:59.000Z

108

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

SciTech Connect

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

109

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

SciTech Connect

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

110

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.

111

Quantifying the hurricane risk to offshore wind turbines  

Science Journals Connector (OSTI)

...generation and transmission costs. U...Atlantic hurricane data show that hurricane...vertical dotted line shows the design...cannot yaw (solid line). The nonyawing...widespread power outages. Wind turbine design...replaced. Dashed lines plot the distribution...distribution is fitted to data from tropical cyclones...

Stephen Rose; Paulina Jaramillo; Mitchell J. Small; Iris Grossmann; Jay Apt

2012-01-01T23:59:59.000Z

112

The effects of second-order hydrodynamics on a semisubmersible floating offshore wind turbine  

Science Journals Connector (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 a floating 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 Maritime Research Institute Netherlands (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 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 was applied to the Offshore Code Comparison Collaboration Continuation OC4-DeepCwind semisubmersible platform, supporting the National Renewable Energy Laboratory's 5-MW baseline wind turbine. In this paper, the loads and response of the system caused by the second-order hydrodynamics are analysed and compared to the 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.

I Bayati; J Jonkman; A Robertson; A Platt

2014-01-01T23:59:59.000Z

113

Test on muddy soil reinforcement by negative pressure and electro-osmosis inside cover-bearing-type bucket foundation for offshore wind turbines  

Science Journals Connector (OSTI)

Cover-bearing-type bucket foundation for offshore wind turbines has been paid more and more attention...

Puyang Zhang ???; Hongyan Ding ???; Shaohua Zhai ???…

2013-02-01T23:59:59.000Z

114

Offshore Wind Advanced Technology Demonstration Projects | Department...  

Office of Environmental Management (EM)

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

115

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...

116

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

117

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

SciTech Connect

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

118

OC3—Benchmark Exercise of Aero-elastic Offshore Wind Turbine Codes  

Science Journals Connector (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". An overview is given on the state-of-the-art of the concerned offshore wind turbine simulation codes. Exemplary results of benchmark simulations from the first phase of the project are presented and discussed while subsequent phases are introduced. Furthermore, the paper discusses areas where differences between the codes have been identified and the sources of those differences, such as the differing theories implemented into the individual codes. Finally, further research and code development needs are presented based on the latest findings from the current state of the project.

P Passon; M Kühn; S Butterfield; J Jonkman; T Camp; T J Larsen

2007-01-01T23:59:59.000Z

119

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

SciTech Connect

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

120

Effect of Forced Excitation on Wind Turbine with Dynamic Analysis in Deep Offshore Wind in Addition to Japanese Status of Offshore Projects  

Science Journals Connector (OSTI)

In this paper, we tried to estimate the effect of control method on floating offshore wind turbine. The experiment in the water basin revealed that traditional blade pitch control can amplify the platform pitch oscillation of floating wind turbine. In order to understand the physical phenomenon, we used aeroelastic simulation using GH Bladed. Turbine model is based on the turbine used in wind tunnel test. To simulate the pitching motion of floating platform, we used onshore wind turbine model with inflow with oscillating wind speed that simulates relative wind speed change from wind turbine's fore-aft pitching motion. Two types of control method are used; fixed pitch variable speed control which represents before rated state of large wind turbines and variable pitch variable speed control which represents over rated state of large wind turbines. Comparing the relation between wind speed change and rotor thrust force change of two control methods, we made it clear that traditional blade pitch control method make thrust force change almost the inverse of wind speed increase and decrease. From thrust force inverse to wind speed change, tower pitching motion can be amplified. That is, blade pitch control can induce negative damping on tower pitching motion. As a conclusion pitch control can increase larger blade load although pitch control aims to reduce the blade load.

Mitsumasa Iino; Toshiki Chujo; Makoto Iida; Chuichi Arakawa

2012-01-01T23:59:59.000Z

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

Dynamic analysis of a 5 megawatt offshore floating wind turbine  

E-Print Network (OSTI)

for floating turbines [4]. ..15 Figure 3.1: Floating turbine degrees of freedom [the motion of a 5 MW floating turbine subjected to ocean

Harriger, Evan Michael

2011-01-01T23:59:59.000Z

122

Electric power from offshore wind via synoptic-scale interconnection  

Science Journals Connector (OSTI)

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

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

2010-01-01T23:59:59.000Z

123

Offshore Wind Power USA  

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

The Offshore Wind Power USA conference provides the latest offshore wind market updates and forecasts.

124

NREL: Wind Research - NREL Supports Innovative Offshore Wind...  

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

NREL Supports Innovative Offshore Wind Energy Projects Demonstration Projects Eligible for up to 46.7M Additional Funding An offshore wind turbine floating off the coast of...

125

Femtosecond laser-inscribed fiber Bragg gratings for strain monitoring in power cables of offshore wind turbines  

Science Journals Connector (OSTI)

A fiber Bragg grating sensor system used for monitoring the effects of strain on the power cable of an offshore wind turbine is presented. The Bragg grating structure was inscribed...

Burgmeier, Jörg; Schippers, Wolfgang; Emde, Nico; Funken, Peter; Schade, Wolfgang

2011-01-01T23:59:59.000Z

126

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

SciTech Connect

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

127

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. part I: Aerodynamics  

Science Journals Connector (OSTI)

Abstract The need to further exploit offshore wind resources has pushed offshore wind farms into deeper waters, requiring the use of floating support structures to be economically sustainable. The use of conventional wind turbines may not continue to be the optimal design for floating applications. Therefore it is important to assess other alternative concepts in this context. Vertical axis wind turbines (VAWTs) are one promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess their technical feasibility. A comprehensive review detailing the areas of engineering expertise utilised in developing an understanding of the coupled dynamics of floating \\{VAWTs\\} has been developed through a series of articles. This first article details the aerodynamic modelling of VAWTs, providing a review of available models, discussing their applicability to floating \\{VAWTs\\} and current implementations by researchers in this field. A concise comparison between conventional horizontal axis wind turbines and \\{VAWTs\\} is also presented, outlining the advantages and disadvantages of these technologies for the floating wind industry. This article has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Andrew Shires; Maurizio Collu

2014-01-01T23:59:59.000Z

128

Long range propagation modeling of offshore wind turbine noise using finite element and parabolic equation models  

Science Journals Connector (OSTI)

Noise generated by offshore wind turbines and support structures radiates and propagates through the air water and sediment. Predicting noise levels around wind turbine structures at sea is required to estimate the effects of the noise on marine life. We used Finite Element(FE) and Parabolic Equation (PE) models to predict long range propagation of noise from the construction and operation of offshore wind turbines.FEanalysis produced pressure outputs at short ranges were used as a starting field for a modified PE propagation model. Furthermore we investigated the optimum range for the transition to PE modeling. The effects of various sediment types were also considered determining the pressure starting field. In FEanalysis models we implemented the axisymmetric elements and implicit dynamic analysis with pressureimpact loading and vertical acceleration boundary conditions to simulate pile driving and operational noise radiation. We will present the PE long range pressure field outputs from the offshore pile driving and operation for a shallow water environment around Block Island Rhode Island.

Huikwan Kim; Gopu R. Potty; James H. Miller; Kevin B. Smith; Georges Dossot

2012-01-01T23:59:59.000Z

129

Sandia National Laboratories: Offshore Wind Energy Simulation...  

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

Offshore Wind Energy Simulation Toolkit Sandia Vertical-Axis Wind-Turbine Research Presented at Science of Making Torque from Wind Conference On July 8, 2014, in Computational...

130

Experimental study of improved modal strain energy method for damage localisation in jacket-type offshore wind turbines  

Science Journals Connector (OSTI)

Abstract An improved modal strain energy method is proposed for damage localisation in jacket-type offshore wind turbines by defining a series of stiffness-correction factors that can be employed to calculate the modal strain energy (MSE) of the measured model without utilising the stiffness matrix of the finite element model (FEM) as an approximation. The theoretical contribution of this article is that the MSE of the measured model could be estimated with better accuracy, and the advantage of the proposed indicator is that it is more sensitive to damage locations than the traditional MSE method. Numerical studies on a tripod offshore jacket wind turbine reveal that the proposed method could locate the damage positions for jacket-type offshore wind turbines when limited number of lower-order modes is available, even when these modes are spatially incomplete. The performance of the proposed method is also investigated using real measurements from a steel jacket-type offshore wind turbine experiment conducted in a water tank of Ocean University of China. The experimental results demonstrated that the proposed method outperforms the traditional MSE method, and damages in jacket-type offshore wind turbines could be properly located utilising the first two measured modes excited by environmental loadings, such as waves, currents, or the vibration of the wind turbine.

Fushun Liu; Huajun Li; Wei Li; Bin Wang

2014-01-01T23:59:59.000Z

131

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

132

Management System for Operations Mantenanace in Offshore Wind Turbine Plant.  

E-Print Network (OSTI)

?? Management system for enhancing transfer of knowledge in wind power industry has not received sufficient research attention in recent times. In some cases, the… (more)

Ghanbari, Ahmad

2012-01-01T23:59:59.000Z

133

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...

134

Numerical analysis of docking operation between service vessels and offshore wind turbines  

Science Journals Connector (OSTI)

Abstract Offshore renewable wind energy market is expected to expand dramatically in the next 5–10 years. Reduction of downtime is crucial to the competitiveness of this new sector. One important part of the research efforts is the evaluation of operational limits (weather limits) of different vessel/access concepts for transportation of maintenance personnel, equipment, and spare parts to the offshore wind turbines. This paper gives a brief description of possible types of service vessel and access system. It presents methodologies for numerical analysis of docking operation by an active motion compensated access device and a simple fender. The proposed frequency–domain approach to the analysis of docking operation with fender is new and highly efficient compared to time–domain simulation. The methods have been applied to two vessel/access concepts in this paper and they can be used in docking operability assessments for a variety of vessels that employ an active motion compensated device or a fender as access system to offshore wind turbines.

MingKang Wu

2014-01-01T23:59:59.000Z

135

Session: Offshore wind  

SciTech Connect

This session at the Wind Energy and Birds/Bats workshop consisted of two presentations. Due to time constraints, a discussion period was not possible. The session addressed the current state of offshore wind energy development. The first presentation ''Monitoring Program and Results: Horns Rev and Nysted'' by Jette Gaarde summarized selected environmental studies conducted to date at operating offshore wind turbine projects in Denmark and lessons from other offshore wind developments in Europe. Wildlife impacts studies from the Danish sites focused on birds, fish, and mammals. The second presentation ''What has the U.S. Wind Industry Learned from the European Example'' by Bonnie Ram provided an update on current permit applications for offshore wind developments in the U.S. as well as lessons that may be drawn from the European experience.

Gaarde, Jette; Ram, Bonnie

2004-09-01T23:59:59.000Z

136

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

137

Development of a free vortex wake method code for offshore floating wind turbines  

Science Journals Connector (OSTI)

Offshore floating wind turbines (OFWTs) present unique aerodynamic analysis challenges. Motion–derived velocity perturbations in the wake necessitate higher–fidelity aerodynamic analysis methods than the ubiquitous momentum balance techniques currently in use. A more physically–sound approach is to model the wake generated by a wind turbine rotor as a freely convecting lattice, using the resultant inflow to estimate rotor loads, as it done with a free vortex wake method (FVM). The FVM code Wake Induced Dynamics Simulator (WInDS) was developed at the University of Massachusetts at Amherst to predict the aerodynamic loading and wake evolution of an OFWT to a higher degree of accuracy than is possible via momentum balance methods. A series of validation cases were conducted to provide some basis for applying \\{WInDS\\} to floating wind turbine cases, for which no aerodynamic experimental data is currently available. The results from these tests show that \\{WInDS\\} is able to accurately predict the aerodynamically–derived loads and wake structures generated by various fixed and rotary–wing cases, and may therefore be applied to more complex cases, like OFWTs, with a degree of confidence.

T. Sebastian; M.A. Lackner

2012-01-01T23:59:59.000Z

138

The wind-wave tunnel test of a tension-leg platform type floating offshore wind turbine  

Science Journals Connector (OSTI)

In this work a tension-leg platform (TLP) type floating offshore wind turbine (FOWT) system was proposed which was based on the National Renewable Energy Laboratory 5?MW offshore wind turbinemodel. Taking the coupled effect of dynamic response of the top wind turbine support tower structure and lower mooring system into consideration the 1/60 scale model test for investigating the coupled wind-wave effect on performance of the floating wind turbine system was done in Harbin Institute of Technology's wind tunnel and wave flume joint laboratory. In addition numerical simulations corresponding to the scale model tests have been performed by advanced numerical tools. The results of model tests and numerical simulations have a good agreement so the availability of the numerical model has been verified. Furthermore to improve the performance of the TLP system one tentative strategy adding mooring lines to the TLP system was proposed and the model test results of the two TLP systems were compared with each other. As a result the motion responses of the floating platform and the force levels of tension legs were effectively reduced by the additional mooring chains. The new TLP FOWT system might play an active and instructive role in the development of future FOWT system.

Nianxin Ren; Yugang Li; Jinping Ou

2012-01-01T23:59:59.000Z

139

Establishing robust short-term distributions of load extremes of offshore wind turbines  

Science Journals Connector (OSTI)

Abstract A novel method with a rigorous theoretical foundation is proposed for establishing robust short-term distributions of load extremes of offshore wind turbines. Based on the wind turbine load time series, the proposed method begins with incorporating a declustering algorithm into the peaks over threshold (POT) method and searching for an optimum threshold level with the aid of a Mean Residual Life (MRL) plot. Then, the method of L-moments is utilized to estimate the parameters in the generalized Pareto distribution (GPD) of the largest values in all the selected clusters over the optimal threshold level. As an example of calculation, an optimal threshold level of the tower base fore-aft extreme bending moments of the National Renewable Energy Laboratory (NREL) 5-MW OC3-Hywind floating wind turbine has been obtained by utilizing the novel method. The short-term extreme response probability plots based on this optimal threshold level are compared with the probability plots based on the empirical and semi-empirical threshold levels, and the accuracy and efficiency of the proposed novel method are substantiated. Diagnostic plots are also included in this paper for validating the accuracy of the proposed novel method. The method has been further validated in another calculation example regarding an NREL 5-MW fixed-bottom monopile wind turbine.

Yingguang Wang; Yiqing Xia; Xiaojun Liu

2013-01-01T23:59:59.000Z

140

A Modular Superconducting Generator for Offshore Wind Turbines  

Science Journals Connector (OSTI)

In this study, a new claw-pole type transverse flux superconducting generator topology is presented. The machine has a stationary superconducting field winding, which eliminates electrical brushes and cryocoupler...

Ozan Keysan; Dariusz Olczak…

2013-05-01T23:59:59.000Z

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

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

E-Print Network (OSTI)

envisioned floating offshore wind turbines. Finally, global35 ] For the three turbines considered, offshore wind farmsusable wind power is evaluated for modern offshore turbine

Capps, Scott B; Zender, Charles S

2010-01-01T23:59:59.000Z

142

On risk-based operation and maintenance of offshore wind turbine components  

Science Journals Connector (OSTI)

Operation and maintenance are significant contributors to the cost of energy for offshore wind turbines. Optimal planning could rationally be based on Bayesian pre-posterior decision theory, and all costs through the lifetime of the structures should be included. This paper contains a study of a generic case where the costs are evaluated for a single wind turbine with a single component. Costs due to inspections, repairs, and lost production are included in the model. The costs are compared for two distinct maintenance strategies, namely with and without inclusion of periodic imperfect inspections. Finally the influence of different important parameters, e.g. failure rate, reliability of inspections, inspection interval, and decision rule for repairs, is evaluated.

Jannie Jessen Nielsen; John Dalsgaard Sørensen

2011-01-01T23:59:59.000Z

143

Impact on Wind Turbine Systems from Transient Fluctuations in Offshore Utility Grids.  

E-Print Network (OSTI)

?? Gas turbines in offshore power systems contribute to about 23% of Norway’s total emissions of CO2. One method for reducing these emissions could be… (more)

Einervoll, Torger

2009-01-01T23:59:59.000Z

144

Understanding Trends in Wind Turbine Prices Over the Past Decade  

E-Print Network (OSTI)

include some offshore wind turbines. That said, the factoffshore wind still accounts for a relatively small portion of Vestas’ turbine

Bolinger, Mark

2012-01-01T23:59:59.000Z

145

On modelling of grouped reliability data for wind turbines  

Science Journals Connector (OSTI)

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

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

2010-10-01T23:59:59.000Z

146

Assessment of the acoustic effects of offshore wind turbines on the marine ecosystem.  

Science Journals Connector (OSTI)

The University of Rhode Island recently completed an assessment of the potential acoustic and other effects of the wind farms on the ecosystem. A developer has proposed to initially construct eight 3.6?MW wind turbines on lattice jacket structures 5 km south of Block Island and approximately 100 turbines in a second stage 20 km east of Block Island. Construction on the first stage is tentatively planned for summer of 2011 and pile driving will be the main source of noise. The main source of operational noise will likely be vibration from the turbine conducted through the lattice jacket structure into the water. Two passive aquatic listener (PAL) systems were deployed 5 km of Block Island from October 6 to November 11 2008. Two more PAL systems were deployed on meteorological buoys one near the first farm and one near the larger farm for 12 months in 2009/2010. Using data from the PALs ambient noise budgets and histograms were computed for this pre?construction phase. The largest sources of noise were found to be shipping wind rain and biological sources. An assessment of the effects of the offshore wind farms will be presented for both the construction and operational phases.?

James H. Miller; Gopu R. Potty; Kathleen Vigness Raposa; David S. Casagrande; Lisa A. Miller; Jeffrey A. Nystuen; Peter M. Scheifele; John Greer Clark

2010-01-01T23:59:59.000Z

147

Incremental wind-wave analysis of the structural capacity of offshore wind turbine support structures under extreme loading  

Science Journals Connector (OSTI)

Abstract Offshore wind turbine (OWT) support structures are subjected to non-proportional environmental wind and wave load patterns with respect to increases in wave height and with respect to wind and wave combined loading. Traditional approaches to estimating the ultimate capacity of offshore support structures are not ideally suited to analysis of OWTs. In this paper, the concept of incremental wind-wave (IWWA) analysis of the structural capacity of OWT support structures is proposed. The approach uses static pushover analysis of OWT support structures subject to wind and wave combined load patterns corresponding to increasing mean return period (MRP). The IWWA framework can be applied as a one-parameter approach (IWWA1) in which the MRP for the wind and wave conditions is assumed to be the same or a two-parameter approach (IWWA2) in which the \\{MRPs\\} associated with wind and wave conditions are related to a joint probability density function characterizing the wind and wave conditions at the site. Example calculations for monopile and jacket supported \\{OWTs\\} at Atlantic marine sites are performed under both one parameter and two parameters IWWA framework. The analyses illustrate that: the results of an IWWA analysis are site specific; and structural response can be dominated by either wind or wave conditions depending on structural characteristics and site conditions. Finally, reliability analyses for both examples excluding uncertainties in structural resistance are estimated based on their IWWA results and probabilistic models for site environmental conditions.

Kai Wei; Sanjay R. Arwade; Andrew T. Myers

2014-01-01T23:59:59.000Z

148

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

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

Incorporation of Multi-Member Incorporation of Multi-Member Substructure Capabilities in FAST for Analysis of Offshore Wind Turbines Preprint H. Song, A. Robertson, and J. Jonkman National Renewable Energy Laboratory D. Sewell University of Delaware Presented at the Offshore Technology Conference Houston, Texas April 30-May 3, 2012 Conference Paper NREL/CP-5000-53676 May 2012 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

149

Development of Simplified Models for Wind Turbine Blades with Application to NREL 5 MW Offshore Research Wind Turbine  

Science Journals Connector (OSTI)

Integration of complex models of wind turbine blades in aeroelastic simulations places an untenable demand on computational resources and, hence, means of speed-up become necessary. This paper considers the pr...

Majid Khorsand Vakilzadeh; Anders T. Johansson…

2014-01-01T23:59:59.000Z

150

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

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

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...

151

Ultimate and accidental limit state design for mooring systems of floating offshore wind turbines  

Science Journals Connector (OSTI)

Abstract The paper deals with the catenary mooring system design for tri-floater floating offshore wind turbines. Both ultimate (ULS) and accidental (ALS) limit states are examined, under 50 and 1 year return period environmental loads. Both power production and parked wind turbine conditions are analysed; for the former the ULS is applied, for the latter both ULS and ALS are considered. The platform static demand is assessed in terms of turbine thrust, wind, current and wave steady drift forces. The dynamic offset is determined considering both wave and low-frequency motions. Mooring patterns with 6, 9 and 12 chain cable and steel wire rope lines are considered. Water depth incidence is examined in the range between 50 and 300 m and the mooring system is dimensioned so that the relevant weight is determined. The Dutch tri-floater is assumed as reference structure and three candidate sites in the Southern Mediterranean Sea are considered. It is found that platform admissible offset and line pattern significantly influence the mooring system weight; obtained results show that 9 and 12 line configurations are the necessary choice and the mooring line weight is independent of water depth between 100 and 200 m, while increases out of this range.

G. Benassai; A. Campanile; V. Piscopo; A. Scamardella

2014-01-01T23:59:59.000Z

152

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

153

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

154

Offshore Floating Wind Turbine-driven Deep Sea Water Pumping for Combined Electrical Power and District Cooling  

Science Journals Connector (OSTI)

A new concept utilising floating wind turbines to exploit the low temperatures of deep sea water for space cooling in buildings is presented. The approach is based on offshore hydraulic wind turbines pumping pressurised deep sea water to a centralised plant consisting of a hydro-electric power system coupled to a large-scale sea water-cooled air conditioning (AC) unit of an urban district cooling network. In order to investigate the potential advantages of this new concept over conventional technologies, a simplified model for performance simulation of a vapour compression AC unit was applied independently to three different systems, with the AC unit operating with (1) a constant flow of sea surface water, (2) a constant flow of sea water consisting of a mixture of surface sea water and deep sea water delivered by a single offshore hydraulic wind turbine and (3) an intermittent flow of deep sea water pumped by a single offshore hydraulic wind turbine. The analysis was based on one year of wind and ambient temperature data for the Central Mediterranean that is known for its deep waters, warm climate and relatively low wind speeds. The study confirmed that while the present concept is less efficient than conventional turbines utilising grid-connected electrical generators, a significant portion of the losses associated with the hydraulic transmission through the pipeline are offset by the extraction of cool deep sea water which reduces the electricity consumption of urban air-conditioning units.

T Sant; D Buhagiar; R N Farrugia

2014-01-01T23:59:59.000Z

155

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...

156

Minimization of Transportation, Installation and Maintenance Operations Costs for Offshore Wind Turbines.  

E-Print Network (OSTI)

??Although it is a sustainable source and there is abundant potential for energy, cost of energy generated from offshore wind is still high compared to… (more)

Faiz, Tasnim Ibn

2014-01-01T23:59:59.000Z

157

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

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

158

Offshore Wind Research (Fact Sheet)  

SciTech Connect

This 2-page fact sheet describes NREL's offshore wind research and development efforts and capabilities. The National Renewable Energy Laboratory is internationally recognized for offshore wind energy research and development (R&D). Its experience and capabilities cover a wide spectrum of wind energy disciplines. NREL's offshore wind R&D efforts focus on critical areas that address the long-term needs of the offshore wind energy industry and the Department of Energy (DOE). R&D efforts include: (1) Developing offshore design tools and methods; (2) Collaborating with international partners; (3) Testing offshore systems and developing standards; (4) Conducting economic analyses; (5) Characterizing offshore wind resources; and (6) Identifying and mitigating offshore wind grid integration challenges and barriers. NREL has developed and maintains a robust, open-source, modular computer-aided engineering (CAE) tool, known as FAST. FAST's state-of-the-art capabilities provide full dynamic system simulation for a range of offshore wind systems. It models the coupled aerodynamic, hydrodynamic, control system, and structural response of offshore wind systems to support the development of innovative wind technologies that are reliable and cost effective. FAST also provides dynamic models of wind turbines on offshore fixed-bottom systems for shallow and transitional depths and floating-platform systems in deep water, thus enabling design innovation and risk reduction and facilitating higher performance designs that will meet DOE's cost of energy, reliability, and deployment objectives.

Not Available

2011-10-01T23:59:59.000Z

159

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...

160

A fully nonlinear wave model to account for breaking wave impact loads on offshore wind turbines  

Science Journals Connector (OSTI)

This paper presents a numerical model capable of simulating offshore wind turbines exposed to extreme loading conditions. External condition-based extreme responses are reproduced by coupling a fully nonlinear wave kinematic solver with a hydro-aero-elastic simulator. The transient nonlinear free surface problem of water waves is formulated assuming the potential theory and a higher-order boundary element method (HOBEM) is used to discretize Laplace’s equation. For temporal evolution a second-order Taylor series expansion is implemented. The code is successfully adopted to simulate overturning plunging breakers, which give rise to dangerous impact loads when they break against wind turbine substructures. Emphasis is also placed on the development of a global simulation framework that aims at embedding the wave simulator into a more general stochastic environment. Indeed, first a linear irregular sea is generated by a spectral approach, then only on critical sub-domains, where wave impacts are expected, the fully nonlinear solver is invoked for a more refined simulation. This permits to systematically account for dangerous effects on the structural response (which would be missed by adopting linear or weakly nonlinear wave theories alone) without penalizing the computational effort.

Enzo Marino; Claudio Borri; Udo Peil

2011-01-01T23:59:59.000Z

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

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

SciTech Connect

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

162

Effects of second-order difference-frequency wave forces on a new floating platform for an offshore wind turbine  

Science Journals Connector (OSTI)

This paper presents a study on an innovative floating platform for an offshore wind turbine operating at water depth of 50-80?m. The main focus is on hydrodynamic modelling of the floating platform with emphasis on the computation of second-order difference-frequency wave forces and their effects on the global rigid-body motion response. The time-domain analysis is conducted by coupling the wave analysis software WADAM of Det Norske Veritas and the aerodynamic code FAST of the National Renewable Energy Laboratory USA to consider the interaction between the wind turbine and floating platform. The numerical model accounts for aerodynamics control system of the wind turbine hydrodynamics and the mooring dynamics of the platform. Case studies with irregular waves and dynamic wind load are performed. A comparison of the results of different case studies is made to assess the influence of second-order wave forces on the motions of the floating platform.

A. Jiawen Li; B. Yougang Tang; C. Ronald W. Yeung

2014-01-01T23:59:59.000Z

163

Offshore Wind Technology Development Projects | Department of...  

Office of Environmental Management (EM)

optimized for installation and operation in the marine environment. Offshore wind turbines are frequently located far from shore, face greater potential for corrosion from...

164

Definition: Offshore Wind | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Offshore Wind (Redirected from Offshore Wind) Jump to: navigation, search Dictionary.png Offshore Wind Wind turbine installations built near-shore or further offshore on coastlines for commercial electricity generation.[1] View on Wikipedia Wikipedia Definition View on Reegle Reegle Definition No reegle definition available Related Terms wind turbine, wind farm, near-shore, offshore References ↑ http://en.wikipedia.org/wiki/Offshore_wind_power Retrie LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ved from "http://en.openei.org/w/index.php?title=Definition:Offshore_Wind&oldid=586583" Category: Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

165

Application of Residual Vectors to Superelement Modeling of an Offshore Wind Turbine Foundation  

Science Journals Connector (OSTI)

Traditionally, wind turbine dynamics are analyzed using aero-elastic codes ... . As hundreds of simulations are required per wind farm for verification purposes, such coarse models ... still capturing the overall...

B. P. Nortier; S. N. Voormeeren; D. J. Rixen

2012-01-01T23:59:59.000Z

166

New Modeling Tool Analyzes Floating Platform Concepts for Offshore Wind Turbines (Fact Sheet), NREL Highlights, Research & Development, NREL (National Renewable Energy Laboratory)  

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

at the National Renewable Energy Laboratory at the National Renewable Energy Laboratory (NREL) develop a new complex modeling and analysis tool capable of analyzing floating platform concepts for offshore wind turbines. The new modeling tool combines the computational methodologies used to analyze land-based wind turbines with the comprehensive hydrodynamic computer programs developed for offshore oil and gas industries. This new coupled dynamic simulation tool will enable the development of cost-effective offshore technologies capable of harvesting the rich offshore wind resources at water depths that cannot be reached using the current technology. Currently, most offshore wind turbines are installed in shallow water, less than 30 meters deep, on bottom-mounted substructures. But these substructures are not

167

Long-term Analysis of Gear Loads in Fixed Offshore Wind Turbines Considering Ultimate Operational Loadings  

Science Journals Connector (OSTI)

Abstract The long-term extreme value analysis of gear transmitted load due to the main shaft torque is presented. Two methods, the multibody simulations (MBS) and a simplified method, are demonstrated for the gear transmitted load calculation. The simplified method is verified by the MBS results. The long-term extreme value of the gear transmitted load for wind speeds from the cut-in to the cut-out values is calculated by the simplified method from the long-term distribution of the main shaft torque. Three statistical methods for long-term extreme value analysis of the main shaft torque in the offshore wind turbines are presented. They are then used to predict the extreme value of the gear transmitted load. An alternative approach, the design state or the environmental contour method is proposed and verified by the full long-term results. The methods are exemplified by a 5 MW gearbox case study. The results of this paper are the basis for further work in Ultimate Limit State (ULS) gear design.

Amir R. Nejad; Zhen Gao; Torgeir Moan

2013-01-01T23:59:59.000Z

168

Simulation of Offshore Wind Turbine Link to the Electric Grid through a Four-Level Converter  

Science Journals Connector (OSTI)

This paper is on the modulation of offshore wind energy conversion systems with full-power converter and permanent magnet synchronous generator with an AC link. The drive train considered in this paper is a th...

Mafalda Seixas; Rui Melício…

2014-01-01T23:59:59.000Z

169

Steady-state analysis of a conceptual offshore wind turbine driven electricity and thermocline energy extraction plant  

Science Journals Connector (OSTI)

Abstract A system for using offshore wind energy to generate electricity and simultaneously extract thermal energy is proposed. This concept is based on an offshore wind turbine driven hydraulic pump supplying deep seawater under high pressure to a land based plant consisting of a hydroelectric power generation unit and heat exchanger. A steady-state system model is developed using empirical formulae. The mathematical model comprises the fundamental system sub-models that are categorised as the rotor, hydraulic pump, pipeline, hydroelectric turbine and heat exchanger. A means for modelling the seawater temperature field across a two-dimensional bathymetry is also discussed. These mathematical models are integrated into a computational tool and a brief parametric static analysis is undertaken. The results illustrate the effect of pipeline diameter, rotational speed of the grid connected hydroelectric turbine, and the turbine distance from shore on the overall performance of the system. Through adequate parameter selection, the total rate of energy output for such a system, consisting of both electricity and thermal energy, is shown to increase by as much as 84%, when compared to a conventional wind turbine having an identical rotor diameter but which supplies only electrical energy.

Daniel Buhagiar; Tonio Sant

2014-01-01T23:59:59.000Z

170

Model test and simulation of modified spar type floating offshore wind turbine with three catenary mooring lines  

Science Journals Connector (OSTI)

Korea is a peninsula which is surrounded by the Yellow Sea (shallow sea) the southern sea and the East Sea (deep sea). These circumstances always make us consider that a platform could have good motion performances in both shallow and deep seas. In this paper the typical spar type platform of the Offshore Code Comparison Collaboration Hywind Floating Offshore Wind Turbine (FOWT) has been modified and a new concept FOWT platform is suggested for both seas. Its motion performances are evaluated by both 1:80 scale model tests and full scale numerical simulations.

2014-01-01T23:59:59.000Z

171

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

172

Energy 101: Wind Turbines - 2014 Update  

SciTech Connect

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

173

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

SciTech Connect

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

174

NREL: Wind Research - Grid Integration of Offshore Wind  

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

Grid Integration of Offshore Wind Grid Integration of Offshore Wind Photograph of a wind turbine in the ocean. Located about 10 kilometers off the coast of Arklow, Ireland, the Arklow Bank offshore wind park consists of seven GE Wind 3.6-MW wind turbines. Much can be learned from the existing land-based integration research for handling the variability and uncertainty of the wind resource. Integration and Transmission One comprehensive grid integration study is the Eastern Wind Integration and Transmission Study (EWITS), in which offshore wind scenarios were analyzed. Nearly 80 GW of offshore wind was studied in the highest penetration scenario. Specific offshore grid distribution and transmission solutions were identified, including cost estimates. With the Atlantic coast likely to lead the way in offshore wind power deployment, EWITS is a benchmark for

175

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

Science Journals Connector (OSTI)

This paper gives an evaluation of most of the commonly used models for predicting wind speed decrease (wake) downstream of a wind turbine. The evaluation is based on six experiments where free-stream and wake wind speed profiles were measured ...

R. J. Barthelmie; G. C. Larsen; S. T. Frandsen; L. Folkerts; K. Rados; S. C. Pryor; B. Lange; G. Schepers

2006-07-01T23:59:59.000Z

176

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

Science Journals Connector (OSTI)

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

Puyang Zhang; Hongyan Ding; Conghuan Le

2013-01-01T23:59:59.000Z

177

Anti-liquefaction characteristics of composite bucket foundations for offshore wind turbines  

Science Journals Connector (OSTI)

Occurrence of liquefaction in saturated sandy deposits under structure foundation can cause a wide range of structural damages from minor settlement to general failure because of bearing capacity loss. By comparing traditional foundations for offshore wind turbines the soil inside and underneath the composite bucket foundation is subjected to the overburden pressure from the foundation self-weight and constrained by a half-closed bucket skirt. The objective of this paper is to clarify the effects of the soil-foundation interaction on the soil liquefaction resistance around the skirt and under the foundation. The dynamic response of the composite bucket foundation during earthquake including coupled soil mode of porous media is calculated using the ADINA finite-element program. A typical configuration of composite bucket foundation is used for the analysis and two earthquake waves (peak ground accelerations of 0.035?g and 0.22?g) are applied as the base acceleration. The results show that the composite bucket foundation exhibited good resistance to seismic action by improving the anti-liquefaction capacity of the soil inside and under the foundation because of the overburden pressure of the self-weight and the constraint effect of the skirt.

2014-01-01T23:59:59.000Z

178

A Comparison of Single- and Multi-parameter Wave Criteria for Accessing Wind Turbines in Strategic Maintenance and Logistics Models for Offshore Wind Farms  

Science Journals Connector (OSTI)

Abstract Different vessel types for transferring technicians for maintenance and inspection of offshore wind farms are often evaluated and compared by their limiting significant wave height for accessing the wind turbines. The limiting significant wave height is also the parameter that is often used as the access criteria in strategic decision support tools for maintenance and logistics for offshore wind farms. In practice, however, other wave parameters, such as the peak wave period and wave heading, have major influence on the accessibility to a wind turbine for a given vessel. We compare the use of single-parameter and multi-parameter wave criteria for access to wind turbines in two strategic maintenance and logistics models for offshore wind farms: one simulation model and one optimization model. Multi-parameter wave criteria in the form of limiting significant wave heights as functions of peak wave period and wave heading are obtained by numerical analysis of the vessel docking operation. Results for availability, operation and maintenance costs and the optimal vessel fleet size and mix are found using both these multi-parameter wave criteria and using a corresponding single-parameter limiting significant wave height. The comparison indicates that the use of a single limiting significant wave height can give similar results as when using more complex multi-parameter wave criteria. An important precondition is that the single limiting significant wave height is carefully chosen to represent the vessel and the wave conditions.

Iver Bakken Sperstad; Elin E. Halvorsen-Weare; Matthias Hofmann; Lars Magne Nonås; Magnus Stålhane; MingKang Wu

2014-01-01T23:59:59.000Z

179

CFD-based design load analysis of 5MW offshore wind turbine  

Science Journals Connector (OSTI)

The structure and aerodynamic loads acting on NREL 5MW reference wind turbine blade are calculated and analyzed based on advanced Computational Fluid Dynamics (CFD) and unsteady Blade Element Momentum (BEM). A detailed examination of the six force components has been carried out (three force components and three moment components). Structure load (gravity and inertia load) and aerodynamic load have been obtained by additional structural calculations (CFD or BEM respectively ). In CFD method the Reynolds Average Navier-Stokes approach was applied to solve the continuity equation of mass conservation and momentum balance so that the complex flow around wind turbines was modeled. Written in C programming language a User Defined Function (UDF) code which defines transient velocity profile according to the Extreme Operating Gust condition was compiled into commercial FLUENT package. Furthermore the unsteady BEM with 3D stall model has also adopted to investigate load components on wind turbine rotor. The present study introduces a comparison between advanced CFD and unsteady BEM for determining load on wind turbine rotor. Results indicate that there are good agreements between both present methods. It is importantly shown that six load components on wind turbine rotor is significant effect under Extreme Operating Gust (EOG) condition. Using advanced CFD and additional structural calculations this study has succeeded to construct accuracy numerical methodology to estimate total load of wind turbine that compose of aerodynamic load and structure load.

T. T. Tran; G. J. Ryu; Y. H. Kim; D. H. Kim

2012-01-01T23:59:59.000Z

180

Offshore wind metadata management  

Science Journals Connector (OSTI)

Offshore wind energy is gaining more and more attention from industry and research community due to its high potential in producing green energy and lowering price on electricity consumption. However, offshore wind is facing many challenges, and hence ...

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

2014-10-01T23:59:59.000Z

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

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

E-Print Network (OSTI)

estimate of future floating turbine depths. [ 32 ] Theenvisioned floating offshore wind turbines. Finally, global

Capps, Scott B; Zender, Charles S

2010-01-01T23:59:59.000Z

182

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

183

Offshore Wind Projects | Department of Energy  

Office of Environmental Management (EM)

Offshore Wind Projects Offshore Wind Projects This report covers the Wind and Water Power Program's offshore wind energy projects from fiscal years 2006 to 2014. Offshore Wind...

184

Sandia National Laboratories: Offshore Wind  

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

EnergyOffshore Wind Offshore Wind Sandia executes several projects in support of the DOE Offshore Wind program, which address unique R&D needs related to offshore siting and, in...

185

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,...

186

STRUCTURAL HEALTH MONITORING OF THE SUPPORT STRUCTURE OF WIND TURBINE USING WIRELESS SENSING SYSTEM  

E-Print Network (OSTI)

structure to resist the complicated environmental loading, especially for the offshore wind turbine. How efficiency of wind turbine, the development of offshore wind farm is in full swing. The wind turbine heavily, especially for the offshore wind turbine. How to manage these wind turbines and monitor the structural safety

Boyer, Edmond

187

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...

188

Aerodynamic Thrust Modelling in Wave Tank Tests of Offshore Floating Wind Turbines Using a Ducted Fan  

Science Journals Connector (OSTI)

Wave tank testing of scaled models is standard practice during the development of floating wind turbine platforms for the validation of the dynamics of conceptual designs. Reliable recreation of the dynamics of a full scale floating wind turbine by a scaled model in a basin requires the precise scaling of the masses and inertias and also the relevant forces and its frequencies acting on the system. The scaling of floating wind turbines based on the Froude number is customary for basin experiments. This method preserves the hydrodynamic similitude, but the resulting Reynolds number is much lower than in full scale. The aerodynamic loads on the rotor are therefore out of scale. Several approaches have been taken to deal with this issue, like using a tuned drag disk or redesigning the scaled rotor. This paper describes the implementation of an alternative method based on the use of a ducted fan located at the model tower top in the place of the rotor. The fan can introduce a variable force that represents the total wind thrust by the rotor. A system controls this force by varying the rpm, and a computer simulation of the full scale rotor provides the desired thrust to be introduced by the fan. This simulation considers the wind turbine control, gusts, turbulent wind, etc. The simulation is performed in synchronicity with the test and it is fed in real time by the displacements and velocities of the platform captured by the acquisition system. Thus, the simulation considers the displacements of the rotor within the wind field and the calculated thrust models the effect of the aerodynamic damping. The system is not able currently to match the effect of gyroscopic momentum. The method has been applied during a test campaign of a semisubmersible platform with full catenary mooring lines for a 6MW wind turbine in scale 1/40 at Ecole Centrale de Nantes. Several tests including pitch free decay under constant wind and combined wave and wind cases have been performed. Data from the experiments are compared with aero-servo-hydro-elastic computations with good agreement showing the validity of the method for the representation of the scaled aerodynamics. The new method for the aerodynamic thrust scaling in basin tests is very promising considering its performance, versatility and lower cost in comparison with other methods.

José Azcona; Faisal Bouchotrouch; Marta González; Joseba Garciandía; Xabier Munduate; Felix Kelberlau; Tor A Nygaard

2014-01-01T23:59:59.000Z

189

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

190

Offshore wind energy systems  

Science Journals Connector (OSTI)

Wind energy systems deployed in the shallow but windy waters of the southern North Sea have the potential to provide more than 20% of UK electricity needs. With existing experience of windmills, and of aircraft and offshore structures, such wind energy systems could be developed within a relatively short timescale. A preliminary assessment of the economics of offshore wind energy systems is encouraging.

P Musgrove

1978-01-01T23:59:59.000Z

191

Sandia National Laboratories: wind turbine blade materials  

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

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

192

Sandia National Laboratories: wind turbine blade reliability  

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

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

193

Operational modal identification of offshore wind turbine structure based on modified stochastic subspace identification method considering harmonic interference  

Science Journals Connector (OSTI)

The structural modal parameter information can be generally obtained from different vibration responses triggered by unknown excitations using the classic modal identification methods which are based on the assumption that the input to the structure is exactly the same or close to the stationary random white noise. For the actual projects such as the offshore wind turbine structure however the imposed loads cannot be considered as the pure white noise excitation because the harmonic components emerge obviously in vibration responses due to periodic rotation excitations of the rotor. When the created harmonic components have greater energy and their frequencies are close to any natural modal frequency of the structure the classic methods can no longer separate harmonic modes from actual structural operational modes under this strong harmonic disturbance thus false modes may be generated and the identification accuracy may be badly affected. To identify the actual structural operational modes accurately under strong harmonic excitation a modified stochastic subspace identification (SSI) method considering harmonic interference called the harmonic modification SSI (HM-SSI) method was proposed in this paper assuming the input harmonic frequencies are known and time-invariant. Then the effectiveness and accuracy of the HM-SSI method were verified through a simple numerical model of cantilever beam excited by various harmonic inputs superimposed on random loads. Besides the superior robustness and better accuracy of identification results affected by the level of noise and the proportion of harmonic energy were reflected. Finally the modal parameter information under different operational conditions was obtained and the safety assessment of an operational wind turbine was made based on the measured data from one offshore wind turbine test prototype at high running speed.

Jijian Lian

2014-01-01T23:59:59.000Z

194

Wind turbine  

SciTech Connect

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

195

Offshore wind metadata management  

Science Journals Connector (OSTI)

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

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

2014-01-01T23:59:59.000Z

196

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

SciTech Connect

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

197

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

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

Calibration and Validation of a Calibration and Validation of a Spar-Type Floating Offshore Wind Turbine Model using the FAST Dynamic Simulation Tool Preprint J.R. Browning University of Colorado-Boulder J. Jonkman and A. Robertson National Renewable Energy Laboratory A.J. Goupee University of Maine Presented at the Science of Making Torque from Wind Oldenburg, Germany October 9-11, 2012 Conference Paper NREL/CP-5000-56138 November 2012 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes.

198

NREL: Wind Research - Offshore Wind Research  

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

Offshore Wind Research Offshore Wind Research Photo of a European offshore wind farm. Early progress in European Offshore Wind Energy over the last decade provides a glimpse into the vast potential of the global offshore resource. For more than eight years, NREL has worked with the Department of Energy to become an international leader in offshore wind energy research. Capabilities NREL's offshore wind capabilities focus on critical areas that reflect the long-term needs of the offshore wind energy industry and the U.S. Department of Energy including: Offshore Design Tools and Methods Offshore Standards and Testing Energy Analysis of Offshore Systems Offshore Wind Resource Characterization Grid Integration of Offshore Wind Key Research NREL documented the status of offshore wind energy in the United States in

199

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part III: Hydrodynamics and coupled modelling approaches  

Science Journals Connector (OSTI)

Abstract The need to further exploit offshore wind resources has pushed offshore wind farms into deeper waters, requiring the use of floating support structures to be economically sustainable. The use of conventional wind turbines may not continue to be the optimal design for floating applications. Therefore it is important to assess other alternative configurations in this context. Vertical axis wind turbines (VAWTs) are one promising configuration, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess the technical feasibility. As part of this task, a series of articles have been developed to present a comprehensive literature review covering the various areas of engineering expertise required to understand the coupled dynamics involved in floating VAWTs. This third article focuses on approaches to develop an efficient coupled model of dynamics (considering aerodynamics, hydrodynamics, structural and mooring line dynamics, and control dynamics) for floating VAWTs, as well as suitable ‘semi-analytical’ hydrodynamic models for this type of coupled dynamics models. Emphasis is also placed on utilising computationally efficient models and programming strategies. A comparison of the various forces acting on a floating VAWT with the three main floating support structure (spar, semi-submersible and tension-leg-platform) is also presented to highlight the relative dominant forces and hence importance of model accuracy representing these forces. Lastly a concise summary covering this series of articles is presented to give the reader an overview of this interdisciplinary research area. This article has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Maurizio Collu

2014-01-01T23:59:59.000Z

200

Reply to Powell and Cocke: On the probability of catastrophic damage to offshore wind farms from hurricanes in the US Gulf Coast  

Science Journals Connector (OSTI)

...on the hurricane risk to offshore wind turbines (2), we have reviewed...different from those for which offshore wind turbines are currently designed; some...Quantifying the hurricane risk to offshore wind turbines . Proc Natl Acad Sci USA 109...

Stephen Rose; Paulina Jaramillo; Mitchell J. Small; Iris Grossmann; Jay Apt

2012-01-01T23:59:59.000Z

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

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. Part II: Mooring line and structural dynamics  

Science Journals Connector (OSTI)

Abstract The need to exploit enhanced wind resources far offshore as well as in deep waters requires the use of floating support structures to become economically viable. The conventional three-bladed horizontal axis wind turbine may not continue to be the optimal design for floating applications. Therefore it is important to assess alternative concepts in this context that may be more suitable. Vertical axis wind turbines (VAWTs) are a promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess their technical feasibility. As part of this task, a series of articles have been developed to present a comprehensive literature review covering the various areas of engineering expertise required to understand the coupled dynamics involved in floating VAWTs. This second article focuses on the modelling of mooring systems and structural behaviour of floating VAWTs, discussing various mathematical models and their suitability within the context of developing a model of coupled dynamics. Emphasis is placed on computational aspects of model selection and development as computational efficiency is an important aspect during preliminary design stages. This paper has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Maurizio Collu; Athanasios Kolios

2014-01-01T23:59:59.000Z

202

SAR-BASED WIND CLIMATOLOGY FOR WIND TURBINES Merete Bruun Christiansen(1)  

E-Print Network (OSTI)

of interest. 1. OFFSHORE WIND ENERGY Wind turbines are being installed at offshore locations in severalSAR-BASED WIND CLIMATOLOGY FOR WIND TURBINES Merete Bruun Christiansen(1) , Charlotte Bay Hasager(1 the offshore wind climate of Denmark. A new tool has been built to bridge the gap between ocean wind retrievals

203

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

204

Energy 101: Wind Turbines  

SciTech Connect

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

205

Blyth Offshore Wind Ltd | Open Energy Information  

Open Energy Info (EERE)

Blyth Offshore Wind Ltd Jump to: navigation, search Name: Blyth Offshore Wind Ltd Place: United Kingdom Sector: Renewable Energy, Wind energy Product: Blyth Offshore Wind Limited,...

206

Offshore Wind Research and Development | Department of Energy  

Office of Environmental Management (EM)

and advanced technology demonstration. Technology Development Offshore wind turbines are frequently located far from shore, more than 60 percent, are in areas where...

207

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...

208

Offshore Wind Energy | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit History Facebook icon Twitter icon » Offshore Wind Energy Jump to: navigation, search The Middelgrunden Wind Farm was established as a collaboration between Middelgrunden Wind Turbine Cooperative and Copenhagen Energy, each installing 10 2-MW Bonus wind turbines. The farm is located off the coast of Denmark, east of the northern tip of Amager. Photo from H.C. Sorensen, NREL 17856 Offshore wind energy is a clean, domestic, renewable resource that can help the United States meet its critical energy, environmental, and economic challenges. By generating electricity from offshore wind turbines, the nation can reduce its greenhouse gas emissions, diversify its energy supply, provide cost-competitive electricity to key coastal regions, and help revitalize key sectors of its economy, including manufacturing.

209

Airborne Wind Turbine  

SciTech Connect

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

210

Avian collision risk at an offshore wind farm  

Science Journals Connector (OSTI)

...research-article Avian collision risk at an offshore wind farm Mark Desholm * Johnny Kahlert...ducks can detect and avoid a large offshore wind farm by tracking their diurnal...1994), and no fewer than 13000 offshore wind turbines are currently proposed...

2005-01-01T23:59:59.000Z

211

Offshore Wind Potential Tables  

Wind Powering America (EERE)

Offshore wind resource by state and wind speed interval within 50 nm of shore. Wind Speed at 90 m (ms) 7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0 Total...

212

Electrification of offshore petroleum installations with offshore wind integration  

Science Journals Connector (OSTI)

Electric power supply to oil and gas platforms is conventionally provided by gas turbines located on the platforms. As these gas turbines emit considerable amounts of CO2 and NOx, it is desirable to find alternative solutions. One alternative is to feed the platforms from the onshore power system via subsea power cables, which already have been implemented on some platforms in the Norwegian part of the North Sea. The paper studies a cluster of petroleum installations in this geographic area, connected to the Norwegian onshore power system through an HVDC voltage link. In the study, an offshore wind farm is also connected to the offshore AC power system. The main focus is investigation of transient stability in the offshore power system, and several fault cases have been studied for different levels of wind power generation. Simulations show that faults on the offshore converter platform can be critical due to the dependency of the reactive power delivered by the HVDC link to the offshore AC system. However, it is shown that local wind power production matching the offshore power demand will improve both voltage- and frequency-stability. Further on, it is indicated that offshore reactive power injections or alternative wind farm control topologies could improve voltage stability offshore.

Jorun I. Marvik; Eirik V. Øyslebø; Magnus Korpås

2013-01-01T23:59:59.000Z

213

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

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

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

214

Turbines in U.S. Waters Will Soon Spin Wind into Electricity...  

Energy Savers (EERE)

faced in capturing the offshore wind resource potential. Construction of offshore wind turbines on floating platforms. In 2010, DOI introduced Smart from the Start, an initiative...

215

The Political Economy of Wind Power in China  

E-Print Network (OSTI)

wind manufacturers to produce offshore wind turbines withturbines, including those suitable for offshore wind farms.

Swanson, Ryan Landon

2011-01-01T23:59:59.000Z

216

Chapter 2 Offshore Wind Power Stations  

Science Journals Connector (OSTI)

Publisher Summary This chapter presents the historical background and development of offshore wind power stations. As early as 1890, windmills were put to work to produce electricity and more than 50,000 mills were in use in the United States alone in the twenties and thirties. Their decline was precipitated by the Rural Electrification Program. According to the San Francisco based Transaction Energy Projects Institute, offshore windmills could generate all the electrical power needed by northern California. Ocean winds have of course provided energy to windmills for centuries. In 1976, a study was commissioned by the (U.S.) Energy Research and Development Administration to ascertain and assess the economic value of offshore multi units aiming at identification and classification of area offshore types, assessing utility requirements for offshore power systems. It includes developing installation concepts including various floating and bottom-mounted designs, assessing current WECS (wind energy converter systems) for use in offshore environments, assessing various electric transmission and hydrogen delivery concepts, and performing an economic assessment, providing tradeoffs for variables such as distance offshore, climate, bottom and wave characteristics and average wave velocities. It is suggested that high wind velocity sites must be identified because the energy flow increases with the cube of the wind velocity; the kinetic energy of the wind passing through the area swept by the blades of a turbine is the energy available to that wind turbine. An average wind speed distribution is required.

1993-01-01T23:59:59.000Z

217

Offshore wind speed and wind power characteristics for ten locations in Aegean and Ionian Seas  

Science Journals Connector (OSTI)

This paper utilizes wind speed data measured at 3 and 10 ... and Aegean Seas to understand the behaviour of wind and thereafter energy yield at these stations using 5 MW rated power offshore wind turbine. With wind

HARALAMBOS S BAGIORGAS; GIOULI MIHALAKAKOU…

2012-08-01T23:59:59.000Z

218

Hurricane wind fields needed to assess risk to offshore wind farms  

Science Journals Connector (OSTI)

...Scatterplot of maximum landfall winds at wind farm locations (y axis) compared with the peak life cycle wind speed for the same hurricane while...Quantifying the hurricane risk to offshore wind turbines . Proc Natl Acad Sci USA 109 : 3247...

Mark D. Powell; Steven Cocke

2012-01-01T23:59:59.000Z

219

Measurement of the underwater noise levels generated from marine piling associated with the installation of offshore wind turbines.  

Science Journals Connector (OSTI)

Marine piling is the most commonly used method for the installation of offshore wind turbines in the shallow coastal waters in the UK and consists of steel mono?piles being driven into the seabed using powerful hydraulic hammers. This is a source of impulsive sound of potentially high level that can travel a considerable distance in the water column and has the potential for impact on marine life. This presentation describes methodologies developed for measurement of marine piling and for the estimation of the energy source level. Measurements are presented for piles of typically 5 m in diameter driven by hammers with typical strike energies of 1000 kJ. Data were recorded as a function of range from the source using vessel?deployed hydrophones and using fixed acoustic buoys that recorded the entire piling sequence including soft start. The methodology of measurement is described along with the method of estimation of the energy source level. Limitations and knowledge gaps are discussed.

Pete D. Theobald; Stephen P. Robinson; Michael A. Ainslie; Christ A. F. de Jong; Paul A. Lepper

2011-01-01T23:59:59.000Z

220

Wind Offshore Port Readiness | Department of Energy  

Office of Environmental Management (EM)

Wind Offshore Port Readiness Wind Offshore Port Readiness This study will aid decision-makers in making informed decisions regarding the choice of ports for specific offshore...

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

Suppression of the vibrations of wind turbine towers  

Science Journals Connector (OSTI)

......suppression of the vibrations of wind turbine towers. As a source of renewable and clean energy, wind power is rapidly increasing its...capacity in many countries. Large offshore turbines are subjected to severe weather......

Xiaowei Zhao; George Weiss

2011-09-01T23:59:59.000Z

222

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

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

223

Turbulence Characteristics in Offshore Wind Farms from LES Simulations of Lillgrund Wind Farm  

Science Journals Connector (OSTI)

Abstract The effect of wind turbine wakes in large offshore wind energy arrays can be a substantial factor in affecting the performance of turbines inside the array. Turbulent mixing plays a key role in the wake recovery, having a significant effect on the length over which the wake is strong enough to affect the performance of other turbines significantly. We highlight how turbulence affects wind turbine wakes using results from LES simulations of Lillgrund offshore wind farm in the context of SCADA data selected to mirror the wind conditions simulated. The analysis here concentrated on temporal spectra of wind velocities measured by the turbine's nacelle anemometer and calculated at the turbine locations in the computational model. The effect of the wind turbine rotor on the downstream flow is quantified by analysing the change in spectral features of turbines within the wind farm compared to turbines at the side of the farm exposed to the wind.

Wolf-Gerrit Früh; Angus C.W. Creech; A. Eoghan Maguire

2014-01-01T23:59:59.000Z

224

EERE Leadership Celebrates Offshore Wind in Maine  

Office of Energy Efficiency and Renewable Energy (EERE)

The University of Maine utilized $12 million in funding from EERE to deploy the VolturnUS, a one-eighth scale prototype of a commercial scale offshore floating turbine. This is the first step toward developing an offshore wind industry in Maine. The University is setting a great example for the rest of the country for just how far we can go when we dedicate ourselves to clean energy innovation.

225

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

226

Further Results on Modeling, Analysis, and Control Synthesis for Offshore Wind Turbine Systems  

Science Journals Connector (OSTI)

Renewable energy is a hot topic all over the world. Nowadays, there are several sustainable renewable power solutions out there; hydro, wind, solar, wave, and biomass to name ... become greener. In the past, all ...

Hamid Reza Karimi; Tore Bakka

2014-01-01T23:59:59.000Z

227

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

228

Vertical axis wind turbine  

SciTech Connect

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

229

New Framework Transforms FAST Wind Turbine Modeling Tool (Fact...  

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

for modeling multisegmented mooring quasi-static behaviors of floating offshore wind turbines; and full conversion of FAST into the new modularization framework. Features of...

230

Load Reduction of Floating Wind Turbines using Tuned Mass Dampers.  

E-Print Network (OSTI)

??Offshore wind turbines have the potential to be an important part of the United States' energy production profile in the coming years. In order to… (more)

Stewart, Gordon M

2012-01-01T23:59:59.000Z

231

Sandia National Laboratories: wind-turbine blade construction  

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

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

232

Offshore Ostsee Wind AG | Open Energy Information  

Open Energy Info (EERE)

Name: Offshore Ostsee Wind AG Place: Brgerende, Mecklenburg-Western Pomerania, Germany Zip: 18211 Sector: Wind energy Product: Joint venture formed to exploit offshore wind...

233

Offshore Wind Accelerator | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Accelerator Place: United Kingdom Sector: Wind energy Product: Research and development initiative aimed at cutting the cost of offshore wind energy. References:...

234

Wind Turbine Tribology Seminar  

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

Wind turbine reliability issues are often linked to failures of contacting components, such as bearings, gears, and actuators. Therefore, special consideration to tribological design in wind...

235

NREL: Wind Research - Offshore Wind Resource Characterization  

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

Offshore Wind Resource Characterization Offshore Wind Resource Characterization Map of the United States, showing the wind potential of offshore areas across the country. Enlarge image US offshore wind speed estimates at 90-m height NREL scientists and engineers are leading efforts in resource mapping, remote sensor measurement and development, and forecasting that are essential for the development of offshore wind. Resource Mapping For more than 15 years, NREL's meteorologists, engineers, and Geographic Information System experts have led the production of wind resource characterization maps and reports used by policy makers, private industry, and other government organizations to inform and accelerate the development of wind energy in the United States. Offshore wind resource data and mapping has strategic uses. As with terrestrial developments, traditional

236

Wind Turbine Competition Introduction  

E-Print Network (OSTI)

Wind Turbine Competition Introduction: The Society of Hispanic Professional Engineers, SHPE at UTK, wishes to invite you to participate in our first `Wind Turbine' competition as part of Engineer's Week). You will be evaluated by how much power your wind turbine generates at the medium setting of our fan

Wang, Xiaorui "Ray"

237

Lake Michigan Offshore Wind Feasibility Assessment  

SciTech Connect

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

238

Managing Offshore Wind Energy Assets: On the Systematic Development of an Integrated Architecture  

Science Journals Connector (OSTI)

Offshore wind turbines are being used in a number ... and convert it to electricity. Commercial-scale offshore wind facilities are currently in operation in shallow ... outer continental shelf. However, this shif...

Idriss El-Thalji; Jayantha P. Liyanage

2012-01-01T23:59:59.000Z

239

Suppression of the vibrations of wind turbine towers  

Science Journals Connector (OSTI)

......renewable and clean energy, wind power is rapidly increasing its...capacity in many countries. Large offshore turbines are subjected to severe...2002) Dynamic modeling of wind farm grid interaction. Wind Eng., 26, 191208. LITTMAN......

Xiaowei Zhao; George Weiss

2011-09-01T23:59:59.000Z

240

Vertical axis wind turbine  

SciTech Connect

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

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

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

E-Print Network (OSTI)

. Particularly during bad weather, wind turbines located offshore are difficult to access for visual inspection-13, 2007. Integral SHM-System for Offshore Wind Turbines Using Smart Wireless Sensors R ROLFES, S ZERBST, G are proposed for use in offshore wind turbines. An attractive feature of their use is their ability to locally

Lynch, Jerome P.

242

Conceptual Design of Floating Wind Turbines with Large-Amplitude Motion  

E-Print Network (OSTI)

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

Sweetman, Bert

243

Offshore Wind Potential Tables  

Wind Powering America (EERE)

Offshore wind resource by state and wind speed interval within 50 nm of shore. Offshore wind resource by state and wind speed interval within 50 nm of shore. Wind Speed at 90 m (m/s) 7.0 - 7.5 7.5 - 8.0 8.0 - 8.5 8.5 - 9.0 9.0 - 9.5 9.5 - 10.0 >10.0 Total >7.0 State Area km 2 (MW) Area km 2 (MW) Area km 2 (MW) Area km 2 (MW) Area km 2 (MW) Area km 2 (MW) Area km 2 (MW) Area km 2 (MW) California 11,439 (57,195) 24,864 (124,318) 23,059 (115,296) 22,852 (114,258) 13,185 (65,924) 15,231 (76,153) 6,926 (34,629) 117,555 (587,773) Connecticut 530 (2,652) 702 (3,508) 40 (201) 0 (0) 0 (0) 0 (0) 0 (0) 1,272 (6,360) Delaware 223 (1,116) 724 (3,618) 1,062 (5,310) 931 (4,657) 0 (0) 0 (0) 0 (0) 2,940 (14,701) Georgia 3,820 (19,102) 7,741 (38,706) 523 (2,617) 0 (0) 0 (0) 0 (0) 0 (0) 12,085 (60,425) Hawaii 18,873 (94,363) 42,298 (211,492)

244

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

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

245

A novel numerical strategy for the simulation of irregular nonlinear waves and their effects on the dynamic response of offshore wind turbines  

Science Journals Connector (OSTI)

We present a novel numerical procedure for the prediction of nonlinear hydrodynamic loads exerted on offshore wind turbines exposed to severe weather conditions. The main feature of the proposed procedure is the computational efficiency, which makes the numerical package suitable for design purposes when a large number of simulations are typically necessary. The small computational effort is due to (i) the use of a domain-decomposition strategy, that, according to the local wave steepness, requires the numerical solution of the nonlinear governing equations only on a limited number of reduced regions (sub-domains) of the whole space–time domain, (ii) the choice of the particular numerical method for the spatial discretization of the governing equation for the water-wave problem. Within the potential flow assumption, the Laplace equation is solved by means of a higher-order boundary-element method (HOBEM). For the time evolution of the unsteady free-surface equations the 4th-order Runge–Kutta algorithm is adopted. The compound solver is successfully applied to simulate nonlinear waves up to overturning plunging breakers, that may cause severe impact loads on the wind turbine substructure. Emphasis is finally given to wind turbine exposed to realistic environmental conditions, where the proposed tool is shown to be capable of capturing important nonlinear effects not detected by the linear models routinely adopted in the design practice.

Enzo Marino; Claudio Lugni; Claudio Borri

2013-01-01T23:59:59.000Z

246

Proposed Evanston Offshore Wind Farm  

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

Evanston Offshore Wind Farm Evanston Offshore Wind Farm August 1, 2011 Monday, August 1, 2011 Off Shore Wind Farm FAQ Document available from http://www.greenerevanston.org/ at the Renewable Energy Task Force tab Monday, August 1, 2011 City Manager Commits to City to sign onto Kyoto emissions reduction goals Wind Farm Timeline April 2006 Summer 2007 Fall 2008 February 2008 April 2010 March 2011 July 2011 Network for Evanston's Future proposes joint climate planning effort CGE Formed and Renewable Energy Task Force formed - Wind farm concept begun ECAP passed by City Council with 1st version of proposed Offshore Wind Farm included Offshore Wind Farm RFI unanimously passed by City Council Mayor Tisdahl appointments Committee on the Wind Farm City Council

247

Offshore Wind Research (Fact Sheet), National Wind Technology Center (NWTC)  

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

Offshore Offshore Wind Research The National Renewable Energy Laboratory is internationally recognized for offshore wind energy research and development (R&D). Its experience and capabilities cover a wide spectrum of wind energy disciplines. NREL's offshore wind R&D efforts focus on critical areas that address the long-term needs of the offshore wind energy industry and the Department of Energy (DOE). R&D efforts include: * Developing offshore design tools and methods * Collaborating with international partners * Testing offshore systems and developing standards * Conducting economic analyses * Characterizing offshore wind resources * Identifying and mitigating offshore wind grid integration challenges and barriers NREL documented the status of offshore wind energy in the United

248

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

249

Sandia National Laboratories: Quantifying Offshore Wind Scour...  

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

ClimateECEnergyComputational Modeling & SimulationQuantifying Offshore Wind Scour with Sandia's Environmental Fluid Dynamics Code (SNL---EFDC) Quantifying Offshore Wind Scour with...

250

Wind Turbines Benefit Crops  

SciTech Connect

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

2010-01-01T23:59:59.000Z

251

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

252

Reinforced Wind Turbine Blades - An Environmental Life Cycle Evaluation  

Science Journals Connector (OSTI)

Methods for producing wind turbines and the foundations for offshore installation are not expected to change much before the year 2025. ... Benchmark LCA data from Ecoinvent for a 2 MW offshore horizontal axis wind turbine was selected with capacity factor of 30% and lifespan of 20 years. ...

Laura Merugula; Vikas Khanna; Bhavik R. Bakshi

2012-08-02T23:59:59.000Z

253

Barstow Wind Turbine Project  

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

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

254

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

255

Predicting underwater radiated noise levels due to the first offshore wind turbine installation in the United States  

Science Journals Connector (OSTI)

Noise generated by offshore impact pile driving radiates into the air water and sediment. Predicting noise levels around the support structures at sea is required to estimate the effects of the noise on marine life. Based on high demands developing renewable energy source the United States will begin the first pile driving within one to two years. It is necessary to investigate acoustic impact using our previously verified coupled Finite Element (Commercial FE code Abaqus) and Monterey Miami Parabolic Equation (2D MMPE) models [J. Acoust. Soc. Am. 131(4) 3392 (2012)]. In the present study we developed a new coupled FE-MMPE model for the identification of zone of injury due to offshore impact pile driving. FE analysis produced acoustic pressure outputs on the surface of the pile which are used as a starting field for a long range 2D MMPE propagation model. It calculates transmission loss for N different azimuthal directions as function of distance from the location of piling with the inputs of corresponding bathymetry and sediment properties. We will present predicted zone of injury by connecting N different distances of equivalent level fishes may get permanent injury due to the first offshore wind farm installation in the United States.

James H. Miller

2013-01-01T23:59:59.000Z

256

Predicting underwater radiated noise levels due to the first offshore wind turbine installation in the U.S.  

Science Journals Connector (OSTI)

Noise generated by offshore impact pile driving radiates into the air water and sediment. Predicting noise levels around the support structures at sea is required to estimate the effects of the noise on marine life. Based on high demands developing renewable energy source the United States will begin the first pile driving within one to two years. It is necessary to investigate acoustic impact using our previously verified coupled Finite Element (Commercial FE code Abaqus) and Monterey Miami Parabolic Equation (2D MMPE) models (J. Acoust. Soc. Am. 131(4) p. 3392 2012). In the present study we developed a new coupled FE-MMPE model for the identification of zone of injury due to offshore impact pile driving. FE analysis produced acoustic pressure outputs on the surface of the pile which are used as a starting field for a long range 2D MMPE propagation model. It calculates transmission loss for N different azimuthal directions as function of distance from the location of piling with the inputs of corresponding bathymetry and sediment properties. We will present predicted zone of injury by connecting N different distances of equivalent level fishes may get permanent injury due to the first offshore wind farm installation in the U.S..

Huikwan Kim; James H. Miller; Gopu R. Potty

2013-01-01T23:59:59.000Z

257

Scale Models & Wind Turbines  

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

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

258

NREL: Wind Research - Offshore Wind Research  

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

standards Third-party design verification of innovative floating and fixed-bottom wind turbines NREL's standards and testing capabilities address the need to validate our...

259

Well-posedness and controllability of a wind turbine tower model  

Science Journals Connector (OSTI)

......of this paper is to develop a wind turbine model in the plane of...force and torque control. Large offshore turbines are subjected to severe...2002) Dynamic modeling of wind farm grid interaction. Wind Eng., 26, 191208. LITTMAN......

Xiaowei Zhao; George Weiss

2011-03-01T23:59:59.000Z

260

NREL: Wind Research - Small Wind Turbine Development  

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

Small Wind Turbine Development Small Wind Turbine Development A photo of Southwest Windpower's Skystream wind turbine in front of a home. PIX14936 Southwest Windpower's Skystream wind turbine. A photo of the Endurance wind turbine. PIX15006 The Endurance wind turbine. A photo of the Atlantic Orient Corporation 15/50 wind turbine at the National Wind Technology Center. PIX07301 The Atlantic Orient Corporation 15/50 wind turbine at the National Wind Technology Center. NREL supports continued market expansion of small wind turbines by funding manufacturers through competitive solicitations (i.e., subcontracts and/or grants) to refine prototype systems leading to commercialization. Learn more about the turbine development projects below. Skystream NREL installed and tested an early prototype of this turbine at the

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

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

262

Stakeholder Engagement and Outreach: Offshore 90-Meter Wind Maps and Wind  

Wind Powering America (EERE)

Offshore 90-Meter Wind Maps and Wind Resource Potential Offshore 90-Meter Wind Maps and Wind Resource Potential The Stakeholder Engagement and Outreach initiative provides 90-meter (m) height, high-resolution wind maps and estimates of the total offshore wind potential that would be possible from developing the available offshore areas. The offshore wind resource maps can be used as a guide to identify regions for commercial wind development. A map of the United States showing offshore wind resource. Washington offshore wind map. Oregon offshore wind map. California offshore wind map. Texas offshore wind map. Minnesota offshore wind map. Lousiana offshore wind map. Wisconsin offshore wind map. Michigan offshore wind map. Michigan offshore wind map. Illinois offshore wind map. Indiana offshore wind map. Ohio offshore wind map. Georgia offshore wind map. South Carolina offshore wind map. North Carolina offshore wind map. Virginia offshore wind map. Maryland offshore wind map. Pennsylvania offshore wind map. Delaware offshore wind map. New Jersey offshore wind map. New York offshore wind map. Maine offshore wind map. Massachusetts offshore wind map. Rhode Island offshore wind map. Connecticut offshore wind map. Hawaii offshore wind map. Delaware offshore wind map. New Hampshire offshore wind map.

263

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

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

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

264

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...

265

Howden Wind Turbines Ltd | Open Energy Information  

Open Energy Info (EERE)

Howden Wind Turbines Ltd Jump to: navigation, search Name: Howden Wind Turbines Ltd Place: United Kingdom Sector: Wind energy Product: Howden was a manufacturer of wind turbines in...

266

Underwater noise from three types of offshore wind turbines: Estimation of impact zones for harbor porpoises and harbor seals  

Science Journals Connector (OSTI)

Underwater noise was recorded from three different types of wind turbines in Denmark and Sweden (Middelgrunden Vindeby and Bockstigen-Valar) during normal operation. Wind turbinenoise was only measurable above ambient noise at frequencies below 500 Hz. Total sound pressure level was in the range 109–127 dB re 1 ? ? Pa rms measured at distances between 14 and 20 m from the foundations. The 1/3-octave noise levels were compared with audiograms of harbor seals and harbor porpoises. Maximum 1/3-octave levels were in the range 106–126 dB re 1 ? ? Pa rms. Maximum range of audibility was estimated under two extreme assumptions on transmission loss (3 and 9 dB per doubling of distance respectively). Audibility was low for harbor porpoises extending 20–70 m from the foundation whereas audibility for harbor seals ranged from less than 100 m to several kilometers. Behavioral reactions of porpoises to the noise appear unlikely except if they are very close to the foundations. However behavioral reactions from seals cannot be excluded up to distances of a few hundred meters. It is unlikely that the noise reaches dangerous levels at any distance from the turbines and the noise is considered incapable of masking acoustic communication by seals and porpoises.

Jakob Tougaard; Oluf Damsgaard Henriksen; Lee A. Miller

2009-01-01T23:59:59.000Z

267

Offshore winds using remote sensing techniques  

Science Journals Connector (OSTI)

Ground-based remote sensing instruments can observe winds at different levels in the atmosphere where the wind characteristics change with height: the range of heights where modern turbine rotors are operating. A six-month wind assessment campaign has been made with a LiDAR (Light Detection And Ranging) and a SoDAR (Sound Detection and Ranging) on the transformer/platform of the world's largest offshore wind farm located at the West coast of Denmark to evaluate their ability to observe offshore winds. The high homogeneity and low turbulence levels registered allow the comparison of LiDAR and SoDAR with measurements from cups on masts surrounding the wind farm showing good agreement for both the mean wind speed and the longitudinal component of turbulence. An extension of mean wind speed profiles from cup measurements on masts with LiDAR observations results in a good match for the free sectors at different wind speeds. The log-linear profile is fitted to the extended profiles (averaged over all stabilities and roughness lengths) and the deviations are small. Extended profiles of turbulence intensity are also shown for different wind speeds up to 161 m. Friction velocities and roughness lengths calculated from the fitted log-linear profile are compared with the Charnock model which seems to overestimate the sea roughness for the free sectors.

Alfredo Peña; Charlotte Bay Hasager; Sven-Erik Gryning; Michael Courtney; Ioannis Antoniou; Torben Mikkelsen; Paul Sørensen

2007-01-01T23:59:59.000Z

268

Wind turbine | Open Energy Information  

Open Energy Info (EERE)

turbine turbine Jump to: navigation, search Dictionary.png Wind turbine: A machine that converts wind energy to mechanical energy; typically connected to a generator to produce electricity. Other definitions:Wikipedia Reegle Contents 1 Types of Wind Turbines 1.1 Vertical Axis Wind Turbines 1.2 Horizontal Axis Wind Turbines 2 Wind Turbine Sizes 3 Components of a Wind Turbine 4 References Types of Wind Turbines There are two basic wind turbine designs: those with a vertical axis (sometimes referred to as VAWTs) and those with a horizontal axis (sometimes referred to as HAWTs). There are several manufacturers of vertical axis turbines, but they have not penetrated the "utility scale" (100 kW capacity and larger) market to the same degree as horizontal axis turbines.[1]

269

Wind Turbine Blade Design  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Blade engineering and design is one of the most complicated and important aspects of modern wind turbine technology. Engineers strive to design blades that extract as much energy from the wind as possible throughout a range of wind speeds and gusts, yet are still durable, quiet and cheap. A variety of ideas for building turbines and teacher handouts are included in this document and at the Web site.

270

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

Science Journals Connector (OSTI)

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

Antoni Calderer; Xin Guo; Lian Shen; Fotis Sotiropoulos

2014-01-01T23:59:59.000Z

271

Attitude and acceptance of offshore wind farms—The influence of travel time and wind farm attributes  

Science Journals Connector (OSTI)

Generally people are more positive towards offshore wind farms compared to on-land wind farms. However, the attitudes are commonly assumed to be independent of experience with wind farms. Important relations between attitude and experience might therefore be disregarded. The present paper gives a novel contribution to this field. First of all, we give a thorough review of the studies that have analysed the relation between experience with wind turbines and attitude. In addition, we supplement the review by analysing the effect of travel distance to the nearest offshore wind farm and the wind farms attributes on attitude towards offshore wind farms. The results point towards that the travel time and the attributes of the nearest offshore wind farm influence the attitude significantly. Travel time has mixed effects on the attitude, whilst offshore wind farms with many turbines generate more positive attitudes compared to wind farms with fewer turbines.

Jacob Ladenburg; Bernd Möller

2011-01-01T23:59:59.000Z

272

2014 Offshore Wind Market & Economic Analysis Cover Photo | Department...  

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

4 Offshore Wind Market & Economic Analysis Cover Photo 2014 Offshore Wind Market & Economic Analysis Cover Photo Navigant 2014 Offshore Wind Market and Economic Analysis.JPG More...

273

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

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

Assessment of Offshore Wind Energy Resources for the United States Assessment of Offshore Wind Energy Resources for the United States This report summarizes the offshore wind...

274

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

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

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

275

NREL: Wind Research - Small Wind Turbine Research  

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

Small Wind Turbine Research Small Wind Turbine Research The National Renewable Energy Laboratory and U.S. Department of Energy (NREL/DOE) Small Wind Project's objectives are to reduce barriers to wind energy expansion, stabilize the market, and expand the number of small wind turbine systems installed in the United States. "Small wind turbine" refers to a turbine smaller than or equal to 100 kilowatts (kW). "Distributed wind" includes small and midsize turbines (100 kW through 1 megawatt [MW]). Since 1996, NREL's small wind turbine research has provided turbine testing, turbine development, and prototype refinement leading to more commercially available small wind turbines. Work is conducted under the following areas. You can also learn more about state and federal policies

276

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

SciTech Connect

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

277

GHG emissions and energy performance of offshore wind power  

Science Journals Connector (OSTI)

Abstract This paper presents specific life cycle GHG emissions from wind power generation from six different 5 MW offshore wind turbine conceptual designs. In addition, the energy performance, expressed by the energy indicators Energy Payback Ratio (EPR) Energy Payback Time (EPT), is calculated for each of the concepts. There are currently few LCA studies in existence which analyse offshore wind turbines with rated power as great as 5 MW. The results, therefore, give valuable additional environmental information concerning large offshore wind power. The resulting GHG emissions vary between 18 and 31.4 g CO2-equivalents per kWh while the energy performance, assessed as EPR and EPT, varies between 7.5 and 12.9, and 1.6 and 2.7 years, respectively. The relatively large ranges in GHG emissions and energy performance are chiefly the result of the differing steel masses required for the analysed platforms. One major conclusion from this study is that specific platform/foundation steel masses are important for the overall GHG emissions relating to offshore wind power. Other parameters of importance when comparing the environmental performance of offshore wind concepts are the lifetime of the turbines, wind conditions, distance to shore, and installation and decommissioning activities. Even though the GHG emissions from wind power vary to a relatively large degree, wind power can fully compete with other low GHG emission electricity technologies, such as nuclear, photovoltaic and hydro power.

Hanne Lerche Raadal; Bjørn Ivar Vold; Anders Myhr; Tor Anders Nygaard

2014-01-01T23:59:59.000Z

278

OpenEI - offshore wind  

Open Energy Info (EERE)

/0 en Offshore Wind Resource /0 en Offshore Wind Resource http://en.openei.org/datasets/node/921 Global Wind Potential Supply Curves by Country, Class, and Depth (quantities in GW)

License
279

wind offshore | OpenEI  

Open Energy Info (EERE)

offshore offshore Dataset Summary Description This dataset presents summary information related to world wind energy. It is part of a supporting dataset for the book World On the Edge: How to Prevent Environmental and Economic Collapse by Lester R. Brown, available from the Earth Policy Institute. Source Earth Policy Institute Date Released January 12th, 2011 (3 years ago) Date Updated Unknown Keywords EU wind offshore Wind Power wind power capacity world Data application/vnd.ms-excel icon Excel spreadsheet, data on multiple tabs (xls, 114.7 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period through 2009 License License Open Data Commons Attribution License Comment "Reuse of our data is permitted. We merely ask that wherever it is listed, it be appropriately cited"

280

offshore wind | OpenEI  

Open Energy Info (EERE)

wind wind Dataset Summary Description Global Wind Potential Supply Curves by Country, Class, and Depth (quantities in GW) Source National Renewable Energy Laboratory Date Released July 12th, 2012 (2 years ago) Date Updated July 12th, 2012 (2 years ago) Keywords offshore resource offshore wind renewable energy potential Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon offshore_resource_100_vs2.xlsx (xlsx, 41.7 KiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL) Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote

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

NREL: Wind Research - Midsize Wind Turbine Research  

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

Midsize Wind Turbine Research Midsize Wind Turbine Research To facilitate the development and commercialization of midsize wind turbines (turbines with a capacity rating of more than 100 kW up to 1 MW), the U.S. Department of Energy (DOE) and NREL launched the Midsize Wind Turbine Development Project. In its latest study, NREL determined that there is a substantial market for midsize wind turbines. One of the most significant barriers to the midsize turbine market is the lack of turbines available for deployment; there are few midsize turbines on the market today. The objectives of the Midsize Wind Turbine Development Project are to reduce the barriers to wind energy expansion by filling an existing domestic technology gap; facilitate partnerships; accelerate maturation of existing U.S. wind energy businesses; and incorporate process improvement

282

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

283

Experimental investigation of the dynamic installation of a slip joint connection between the monopile and tower of an offshore wind turbine  

Science Journals Connector (OSTI)

The failure of the traditional grouted connections of offshore wind turbines has led to the investigation of alternatives that provide a connection between the foundation pile and the turbine tower. An alternative to the traditional joint is a steel-to-steel connection also called a slip joint. To ensure a proper fit of the slip joint a dynamic installation of the joint is proposed. In this contribution, the effectiveness of harmonic excitation as an installation procedure is experimentally investigated using a 1:10 scaled model of the joint. During the dynamic installation test the applied static load, settlements and dynamic response of the joint are monitored using respectively load cells, taut wires and strain gauges placed both inside and outside the conical surfaces. The results show that settlement occurs only when applying a harmonic load at specific forcing frequencies. The settlement stabilizes to a certain level for each of the specific frequencies, indicating that a controlled way of installation is possible. The results show that it is essential to vibrate at specific frequencies and that a larger amplitude of the harmonic force does not automatically lead to additional settlement.

M L A Segeren; K W Hermans

2014-01-01T23:59:59.000Z

284

Electrical Collection and Transmission Systems for Offshore Wind Power: Preprint  

SciTech Connect

The electrical systems needed for offshore wind farms to collect power from wind turbines--and transmit it to shore--will be a significant cost element of these systems. This paper describes the development of a simplified model of the cost and performance of such systems.

Green, J.; Bowen, A.; Fingersh, L.J.; Wan, Y.

2007-03-01T23:59:59.000Z

285

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

286

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

287

Accelerating Offshore Wind Development | Department of Energy  

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

Accelerating Offshore Wind Development Accelerating Offshore Wind Development Accelerating Offshore Wind Development December 12, 2012 - 2:15pm Addthis Matthew Loveless Matthew Loveless Data Integration Specialist, Office of Public Affairs What does this project do? The 2012 investments support innovative offshore installations for commercial deployment by 2017. The 2011 grants were targeted at projects that aim to either improve the technology used for offshore wind generation or remove the market barriers to offshore wind generation. View the Full Map Today the Energy Department announced investments in seven offshore wind demonstration projects. These projects are part of a broader effort to launch an offshore wind industry in the United States, and support innovative offshore installations for commercial deployment by 2017.

288

Rhode Island to Build First Offshore Wind Farm | Department of Energy  

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

Rhode Island to Build First Offshore Wind Farm Rhode Island to Build First Offshore Wind Farm Rhode Island to Build First Offshore Wind Farm March 15, 2010 - 6:38pm Addthis Rhode Island’s first offshore wind farm will be built in Block Island. | File photo Rhode Island's first offshore wind farm will be built in Block Island. | File photo Block Island, a small town with only 1,000 full-time, residents, is the site for a big project, when it will become home to Rhode Island's first offshore wind farm. Powerful ocean winds lie right off Block Island's south shore. That's the benefit of offshore wind farms - they can take advantage of the harder, stronger winds found a few miles off the coast Deepwater Wind LLC is leading the effort with plans to construct up to eight wind turbines three miles off of Block Island's shore.

289

U.S. Offshore Wind Port Readiness  

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

Report that reviews the current capability of U.S. ports to support offshore wind project development and assesses the challenges and opportunities related to upgrading this capability to support as much as 54 gigawatts of offshore wind by 2030.

290

Kickoff of Offshore Wind Power in China: Playoffs for China Wind Power Development  

Science Journals Connector (OSTI)

Year 2010 is the significant year of offshore wind power development in China. The first national offshore wind power project is connected to the grid, and the first round of concession projects marks the strong support from central government. It is foreseeable that offshore wind power capacity in China will expand rapidly in the future, and the understanding pattern of it is crucial for analyzing the overall wind market in China and global offshore wind power development. This paper firstly provides an overview of global offshore wind power development, then in China, including historical installation, potential of resources, demonstration and concession projects, and target of development. Based on this, analysis on current policies related to offshore wind power and their implementation, current wind farm developers and turbine manufacturers of China's offshore wind industry is done. All the previous analysis generates complete evaluation of current status and some issues and trends of China offshore wind power development, based on which some policy recommendations for sustainable development of offshore wind power are made.

Zhang Xiliang; Zhang Da; Michele Stua

2012-01-01T23:59:59.000Z

291

WINDExchange: Offshore 90-Meter Wind Maps and Wind Resource Potential  

Wind Powering America (EERE)

Offshore 90-Meter Wind Maps and Wind Resource Potential The U.S. Department of Energy provides 90-meter (m) height, high-resolution wind maps and estimates of the total offshore...

292

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,...

293

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

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

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

294

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

295

What economic support is needed for Arctic offshore wind power?  

Science Journals Connector (OSTI)

Abstract Wind power is increasingly being installed in cold climates and in offshore locations. It is generally recognised that installing wind power to offshore locations is more expensive than onshore. The additional challenges from Arctic conditions with annual sea icing are still poorly known. We reviewed the existing knowledge of offshore wind power costs and developed a calculation model for the economics of offshore wind turbines in Finland, including taxes and sea base rent, to obtain a base case for determining the required tariff support. The model was tested with different production and cost rates to obtain a tariff price, which would make offshore wind power on Finnish territory economically viable for the producer. The main developers of planned offshore projects in Finland were interviewed to obtain a comparison between the created model and industry expectations. The cost of erected turbines was estimated to be 2750 €/kW. With this cost of capacity, it was clear that a higher than the current tariff price (83.5 €/MWh) will be required for offshore developments. Our analysis indicated a price level of about 115 €/MWh to be required. We found that even rather small changes in cost or production rates may lead to excess profits or economic losses and further research and pilot projects are required to define a more reliable tariff level.

Olli Salo; Sanna Syri

2014-01-01T23:59:59.000Z

296

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

297

Distributed Wind Turbines | Department of Energy  

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

Distributed Wind Turbines Distributed Wind Turbines Addthis 1 of 11 Three 100 kilowatt (kW) wind turbines in Bisaccia, Italy. Last year, U.S. small wind turbines were exported to...

298

EA-1985: Virginia Offshore Wind Technology Advancement Project...  

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

5: Virginia Offshore Wind Technology Advancement Project (VOWTAP), 24 nautical miles offshore of Virginia Beach, Virginia EA-1985: Virginia Offshore Wind Technology Advancement...

299

Large-eddy simulation of offshore wind farm  

Science Journals Connector (OSTI)

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

2014-01-01T23:59:59.000Z

300

NREL: Wind Research - Research and Development  

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

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

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

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

SciTech Connect

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

302

Promoting Offshore Wind Along the "Fresh Coast" | Department of Energy  

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

Promoting Offshore Wind Along the "Fresh Coast" Promoting Offshore Wind Along the "Fresh Coast" Promoting Offshore Wind Along the "Fresh Coast" October 12, 2010 - 12:18pm Addthis Chris Hart Offshore Wind Team Lead, Wind & Water Power Program When people think about offshore wind power, the first location that comes to mind probably isn't Cleveland, Ohio. Most of the offshore wind turbines installed around the world are operating in salt water, like Europe's North Sea and Baltic Sea, and most of the offshore wind projects proposed in U.S. waters are in the Atlantic Ocean or Gulf of Mexico. But the winds blowing above Lake Erie, only a few miles off the shore from Cleveland, represent a huge potential source of clean, renewable energy that could yield substantial benefits for the regional economy and

303

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

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

304

How Do Wind Turbines Work?  

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

Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity.

305

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 to build wind turbines in Lake Erie. "This is a great day for Northeast Ohio," said LEEDCo CEO Lorry Wagner

Rollins, Andrew M.

306

Optimization of Wind Turbine Operation  

E-Print Network (OSTI)

inclination angle was about 1°. The spinner anemometer measurements were correlated with wind speed and windOptimization 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

307

Hurricanes and Offshore Wind Farms  

Wind Powering America (EERE)

Hurricanes and Offshore Wind Farms Hurricanes and Offshore Wind Farms July 17, 2013 Man: Please continue to stand by. Today's conference will begin momentarily. Thank you. Coordinator: Welcome, and think you for standing by. At this time, all participants are in a listen only mode for the duration of today's call. Today's conference is being recorded. If you have any objections, you may disconnect at this time. Now I would like to turn the meeting over to Mr. Jonathan Bartlett. Sir you may begin. Jonathan Bartlett: Thank you. Good afternoon, this is Jonathan Bartlett. I'm speaking to you from the Department of Energy in Washington, D.C. Welcome everyone to the July Edition of the Wind Power in America webinar. This month we have two speakers, Joel Cline and Mark Powell will discuss the impacts of

308

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

309

National Offshore Wind Energy Grid Interconnection Study  

SciTech Connect

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

310

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.

311

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

312

An Exploration of Wind Energy & Wind Turbines | Department of...  

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

An Exploration of Wind Energy & Wind Turbines An Exploration of Wind Energy & Wind Turbines Below is information about the student activitylesson plan from your search. Grades...

313

Category:Wind turbine | Open Energy Information  

Open Energy Info (EERE)

turbine Jump to: navigation, search Pages in category "Wind turbine" This category contains only the following page. W Wind turbine Retrieved from "http:en.openei.orgw...

314

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

315

Galveston Offshore Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Farm Offshore Wind Farm Jump to: navigation, search Name Galveston Offshore Wind Farm Facility Galveston Offshore Wind Farm Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Wind Energy Systems Technology Developer Wind Energy Systems Technology Location Offshore from Galveston TX Coordinates 29.161°, -94.797° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.161,"lon":-94.797,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

316

Exploiting Wind Versus Coal  

Science Journals Connector (OSTI)

...be offset with turbine mass production...of installed turbines, more than the...Denmark have wind parks offshore, where winds...of installed turbines, more than the...Denmark have wind parks offshore, where winds...

Mark Z. Jacobson; Gilbert M. Masters

2001-08-24T23:59:59.000Z

317

Aerodynamic effects on TLP type wind turbines and predictions of the electricity they generate  

Science Journals Connector (OSTI)

This research proposes a new offshore wind energy generation system that uses a tension ... and describes experiments performed on a TLP type wind turbine in both waves and wind. The following conclusions can be ...

Yasunori Nihei; Hiroyuki Fujioka

2011-06-01T23:59:59.000Z

318

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

SciTech Connect

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

319

New Report Shows Trend Toward Larger Offshore Wind Systems, with 11  

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

Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Advanced Stage Projects Proposed in U.S. Waters New Report Shows Trend Toward Larger Offshore Wind Systems, with 11 Advanced Stage Projects Proposed in U.S. Waters October 23, 2013 - 10:52am Addthis The Energy Department today released a new report showing progress for the U.S. offshore wind energy market in 2012, including the completion of two commercial lease auctions for federal Wind Energy Areas and 11 commercial-scale U.S. projects representing over 3,800 megawatts (MW) of capacity reaching an advanced stage of development. Further, the report highlights global trends toward building offshore turbines in deeper waters and using larger, more efficient turbines in offshore wind farms, increasing the amount of electricity delivered to consumers.

320

American Wind Energy Association Offshore WINDPOWER Conference...  

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

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...

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

Well-posedness and controllability of a wind turbine tower model  

Science Journals Connector (OSTI)

......the tower is uniform. Keywords: wind turbine tower; coupled system; SCOLE...aim of this paper is to develop a wind turbine model in the plane of the turbine...force and torque control. Large offshore turbines are subjected to severe......

Xiaowei Zhao; George Weiss

2011-03-01T23:59:59.000Z

322

Brilliant Wind Turbine | GE Global Research  

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

Brilliant(tm) Wind Turbines Push Power and Efficient Boundaries Brilliant(tm) Wind Turbines Push Power and Efficient Boundaries The conventional wisdom around wind is that the...

323

European Wind Atlas: Offshore | Open Energy Information  

Open Energy Info (EERE)

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

324

INFOGRAPHIC: Offshore Wind Outlook | Department of Energy  

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

Offshore Wind Outlook Offshore Wind Outlook INFOGRAPHIC: Offshore Wind Outlook December 12, 2012 - 2:15pm Addthis According to a new report commissioned by the Energy Department, a U.S. offshore wind industry that takes advantage of this abundant domestic resource could support up to 200,000 manufacturing, construction, operation and supply chain jobs across the country and drive over $70 billion in annual investments by 2030. Infographic by Sarah Gerrity. For more details, check out: New Reports Chart Offshore Wind’s Path Forward. According to a new report commissioned by the Energy Department, a U.S. offshore wind industry that takes advantage of this abundant domestic

325

Tillamook Offshore Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Farm Offshore Wind Farm Jump to: navigation, search Name Tillamook Offshore Wind Farm Facility Tillamook Offshore Wind Farm Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Principle Power Developer Principle Power Location Offshore from Tillamook OR Coordinates 45.527°, -124.179° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":45.527,"lon":-124.179,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

326

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

E-Print Network (OSTI)

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

Sweetman, Bert

327

Soft computing based optimum parameter design of PID controller in rotor speed control of wind turbines  

Science Journals Connector (OSTI)

Sensitivity and robustness is the primary issue while designing the controller for large non-linear systems such as offshore wind turbines. The main goal of this study is a novel soft computing based approach in controlling the rotor speed of wind turbine. ... Keywords: bacteria foraging optimization algorithm, optimization, particle swarm optimization, proportional-integral-derivative controller, wind turbines

R. Manikandan; Nilanjan Saha

2011-12-01T23:59:59.000Z

328

Optimum propeller wind turbines  

SciTech Connect

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

329

Department of Energy Awards $43 Million to Spur Offshore Wind Energy |  

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

Department of Energy Awards $43 Million to Spur Offshore Wind Department of Energy Awards $43 Million to Spur Offshore Wind Energy Department of Energy Awards $43 Million to Spur Offshore Wind Energy September 8, 2011 - 9:46am Addthis Washington, D.C. - U.S. Energy Secretary Steven Chu today announced $43 million over the next five years to speed technical innovations, lower costs, and shorten the timeline for deploying offshore wind energy systems. The 41 projects across 20 states 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 awards announced today will help the U.S. to compete in the global wind energy manufacturing sector, promote economic development and job creation, and

330

Department of Energy Awards $43 Million to Spur Offshore Wind Energy |  

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

Department of Energy Awards $43 Million to Spur Offshore Wind Department of Energy Awards $43 Million to Spur Offshore Wind Energy Department of Energy Awards $43 Million to Spur Offshore Wind Energy September 8, 2011 - 9:46am Addthis Washington, D.C. - U.S. Energy Secretary Steven Chu today announced $43 million over the next five years to speed technical innovations, lower costs, and shorten the timeline for deploying offshore wind energy systems. The 41 projects across 20 states 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 awards announced today will help the U.S. to compete in the global wind energy manufacturing sector, promote economic development and job creation, and

331

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

332

Oregon Department of Energy Webinar: Offshore Wind  

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

The intended audience for this webinar on offshore wind basics is decision-makers, energy industry practitioners, utilities, and those knowledgeable about renewable energy. The webinar will feature...

333

Offshore Wind in NY State (New York)  

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

334

NREL: Wind Research - Small Wind Turbine Webinars  

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

Small Wind Turbine Webinars Small Wind Turbine Webinars Here you will find webinars about small wind turbines that NREL hosted. Introducing WindLease(tm): Making Wind Energy Affordable NREL and the American Solar Energy Society (ASES) Wind Division co-hosted this webinar. (Text Version.) Date: August 1, 2013 Run Time: 40 minutes Joe Hess, VP of Business Development at United Wind, described United Wind's WindQuote and WindLease Program and explained the process from the dealer's and consumer's perspective. Texas Renewable Energy Industries Association NREL and the American Solar Energy Society (ASES) Wind Division co-hosted this webinar. (Text Version). Date: March 7, 2013 Run Time: 1 hour Russel Smith, Texas Renewable Energy Industries Association executive director and co-founder, provided an overview of the trade association

335

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...

336

41 Offshore Wind Power R&D Projects Receive Energy Department...  

Energy Savers (EERE)

with extreme events, such as hurricanes, to help design more robust offshore wind turbines. Regents of the University of Michigan Ann Arbor, MI 400,000 This project will...

337

Motion of floating wind turbines.  

E-Print Network (OSTI)

?? Motion of floating wind turbines has been studied. A literature study on different concepts and what tools are available for simulating them is presented.… (more)

Linde, Børge

2010-01-01T23:59:59.000Z

338

Aerodynamic Analysis of wind turbine.  

E-Print Network (OSTI)

??The thesis investigates the application of vortex theory for analyzing the aerodynamic loads on wind turbine blades. Based on this method, a graphical user friendly… (more)

Zarmehri, Ayyoob

2012-01-01T23:59:59.000Z

339

Optimal Siting of Offshore Wind Farms  

Science Journals Connector (OSTI)

The goal of this study is finding the best location for constructing an offshore wind farm with respect to investment and operation costs and technical limitations. Wind speed, sea depth and distance between shor...

Salman Kheirabadi Shahvali…

2014-01-01T23:59:59.000Z

340

Offshore wind energy development in China: Current status and future perspective  

Science Journals Connector (OSTI)

Year 2010 is the significant year of offshore wind power development in China. The first national offshore wind power project is connected to the grid, and the first round of concession projects marks the strong support from central government. It is foreseeable that offshore wind power capacity in China will expand rapidly, and play a notable role in the transition to a sustainable energy system, therefore, the understanding pattern of it is crucial for analyzing the overall wind market in China and global offshore wind power development. This paper firstly provides an overview of global offshore wind power development, then in China, including historical installation, potential of resources, demonstration and concession projects, and target of development. Furthermore, a comprehensive overview of advantages and challenges for developing offshore wind in China is presented. Based on this, analysis on current policies related to offshore wind power and their implementation, current wind farm developers and turbine manufacturers as well as technology transfer and development of China's offshore wind industry is done. All the previous analysis generates complete evaluation of current status and future perspectives of China offshore wind power development, based on which some policy recommendations for sustainable development of offshore wind power are made.

Zhang Da; Zhang Xiliang; He Jiankun; Chai Qimin

2011-01-01T23:59:59.000Z

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

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

342

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...

343

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

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

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...

344

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

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

345

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...

346

U.S. Offshore Wind Manufacturing and Supply Chain Development...  

Office of Environmental Management (EM)

U.S. Offshore Wind Manufacturing and Supply Chain Development U.S. Offshore Wind Manufacturing and Supply Chain Development This report seeks to provide an organized, analytical...

347

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...

348

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 -...

349

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

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

Economic Impacts of Offshore Wind, Clean Energy Financing Programs, and More DOE Announces Webinars on Economic Impacts of Offshore Wind, Clean Energy Financing Programs, and More...

350

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

Energy Savers (EERE)

Highlights Trends in Offshore Wind with 14 Projects Currently In Advanced Stages of Development New Report Highlights Trends in Offshore Wind with 14 Projects Currently In Advanced...

351

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

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

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...

352

Wind Turbine Basics | Department of Energy  

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

Wind Turbine Basics Wind Turbine Basics Wind Turbine Basics July 30, 2013 - 2:58pm Addthis Energy 101: Wind Turbines Basics This video explains the basics of how wind turbines operate to produce clean power from an abundant, renewable resource-the wind. Text Version Wind turbine assembly Although all wind turbines operate on similar principles, several varieties are in use today. These include horizontal axis turbines and vertical axis turbines. Horizontal Axis Turbines Horizontal axis turbines are the most common turbine configuration used today. They consist of a tall tower, atop which sits a fan-like rotor that faces into or away from the wind, a generator, a controller, and other components. Most horizontal axis turbines built today are two- or three-bladed. Horizontal axis turbines sit high atop towers to take advantage of the

353

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

354

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

355

Addressing Wind Turbine Tribological Challenges with Surface...  

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

356

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, clean energy. While profiting from wind energy, the noise produced by a modern wind turbine becomes

Paris-Sud XI, Université de

357

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

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

NREL Analyzes Floating Offshore Wind Technology for Statoil November 6, 2014 NREL engineers traveled to Oslo, Norway, to meet with Statoil representatives regarding NREL's analysis...

358

Offshore Wind Resource | OpenEI  

Open Energy Info (EERE)

Offshore Wind Resource Offshore Wind Resource Dataset Summary Description Global Wind Potential Supply Curves by Country, Class, and Depth (quantities in GW) Source National Renewable Energy Laboratory Date Released July 12th, 2012 (2 years ago) Date Updated July 12th, 2012 (2 years ago) Keywords offshore resource offshore wind renewable energy potential Data application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon offshore_resource_100_vs2.xlsx (xlsx, 41.7 KiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period License License Open Data Commons Public Domain Dedication and Licence (PDDL) Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access

359

Strengthening Americas Energy Security with Offshore Wind (Fact Sheet) (Revised), Wind And Water Power Program (WWPP)  

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

crane mounted on a barge designed for offshore crane mounted on a barge designed for offshore wind turbine installation lifts a rotor into place. Photo courtesy of © DOTI 2009-alpha ventus Offshore wind energy is a clean, domestic, renewable resource that can help the United States meet its critical energy, environmental, and economic challenges. By generating electricity from offshore wind turbines, the nation can reduce its greenhouse gas emissions, diversify its energy supply, provide cost-competitive electricity to key coastal regions, and help revitalize key sectors of its economy, including manufacturing. However, realizing these benefits will require overcoming key barriers to the development and deployment of offshore wind technology, including its relatively high cost of energy, technical challenges surrounding installation and

360

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

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

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

362

Virginia Offshore Wind Development Authority (Virginia) | Department of  

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

Virginia Offshore Wind Development Authority (Virginia) Virginia Offshore Wind Development Authority (Virginia) Virginia Offshore Wind Development Authority (Virginia) < Back Eligibility Commercial Construction Developer Industrial Installer/Contractor Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative Systems Integrator Tribal Government Utility Savings Category Wind Buying & Making Electricity Program Info State Virginia Program Type Industry Recruitment/Support Provider Virginia Offshore Wind Development Authority 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 qualified entities, of the offshore wind energy industry, offshore wind energy projects, and

363

Wind Turbine Basics | Department of Energy  

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

Turbine Basics Turbine Basics Wind Turbine Basics July 30, 2013 - 2:58pm Addthis Energy 101: Wind Turbines Basics This video explains the basics of how wind turbines operate to produce clean power from an abundant, renewable resource-the wind. Text Version Wind turbine assembly Although all wind turbines operate on similar principles, several varieties are in use today. These include horizontal axis turbines and vertical axis turbines. Horizontal Axis Turbines Horizontal axis turbines are the most common turbine configuration used today. They consist of a tall tower, atop which sits a fan-like rotor that faces into or away from the wind, a generator, a controller, and other components. Most horizontal axis turbines built today are two- or three-bladed. Horizontal axis turbines sit high atop towers to take advantage of the

364

NREL: Wind Research - Utility-Scale Wind Turbine Research  

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

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

365

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

SciTech Connect

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

366

DOE External Advisory Mee4ng: Dec, 2013 Atlan&c Offshore Wind Consor&um  

E-Print Network (OSTI)

1 DOE External Advisory Mee4ng: Dec, 2013 Atlan&c Offshore Wind Consor&um Assessing Tribological Aspects of Gearbox Reliability in Wind Turbines David L the effects of wind-specific factors on gearbox reliability 2) Iden&fy design solu

Firestone, Jeremy

367

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

368

THE CHALLENGE IN FINDING LONG-TERM LUBRICATION solutions for wind turbines  

E-Print Network (OSTI)

THE CHALLENGE IN FINDING LONG-TERM LUBRICATION solutions for wind turbines is well known wind turbines in a farm in order to improve their longevity. In a previous TLT article, research- ers used a technique known as Simula- tor for Offshore /Onshore Wind Farm Applications to examine

Chiao, Jung-Chih

369

Estimation methods review and analysis of offshore extreme wind speeds and wind energy resources  

Science Journals Connector (OSTI)

Abstract Offshore wind resources are more abundant and stronger and they blow more consistently than land-based wind resources. While gale force winds are easier to hit on the sea, the strong wind vibration and wind loads may exert severe damage and shock to wind turbines and wind power grids, even resulting in power grid collapse. Thus, to develop offshore wind power, apart from accurate quantitative wind energy potential assessments, it is necessary to effectively estimate extreme wind speeds. Toward this purpose, this paper investigates the current status of extreme wind speeds and wind energy assessment from literature review. It turns out that much work on wind energy estimation has been performed, whereas relatively little research involves extreme wind speeds, the main challenge stemming from the limited availability of derived extreme winds. Then a GH method based on artificial intelligence optimization algorithms is developed to re-analyze future samples of extreme wind speeds. On the basis of the re-analyzed extreme samples, as well as the Generalized Extreme Value (GEV) and Gumbel models optimized by Cuckoo Search (CS) and Chaotic Particle Swarm Optimization (CPSO) algorithms, the potential risks of extreme wind speeds are conducted based on 23-year (1990–2012) historic wind speeds. Thus, in terms of wind speeds, a comprehensive estimation for offshore wind energy is initially implemented in Bohai Rim, China. The assessment shows that the study areas have high-strength wind power but are rarely subjected to extreme wind speeds, which implies that it is suitable for wind farm construction.

Jianzhou Wang; Shanshan Qin; Shiqiang Jin; Jie Wu

2015-01-01T23:59:59.000Z

370

Accelerating Offshore Wind Development | Department of Energy  

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

Accelerating Offshore Wind Development Accelerating Offshore Wind Development Accelerating Offshore Wind Development Click on a project for more information. The Energy Department has selected seven projects that will accelerate the commercialization of innovative offshore wind technologies in the United States. Each project will receive up to $4 million from the Energy Department to complete the engineering, site evaluation, and planning phase of their project. Upon completion of this phase, the Energy Department will select the up to three of these projects to advance the follow-on design, fabrication, and deployment phases to achieve commercial operation by 2017. Each of the these projects will be eligible for up to $47 million in additional funding over four years, subject to Congressional appropriations. This map also includes 42

371

Making Offshore Wind Areas Available for Leasing   

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

When the U.S. Department of the Interior's Bureau of Ocean Energy Management (BOEM) needed a process to delineate the bureau's proposed offshore Wind Energy Areas (WEA) into auctionable leasing areas, the agency turned to DOE's National Renewable Energy Laboratory (NREL). Under an interagency agreement, wind energy experts from NREL helped develop a process to evaluate BOEM's designated offshore WEAs in terms of energy production, resource, water depth, and other physical criteria and delineate specific WEAs into two or more leasing areas.

372

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

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

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

373

Westwind Wind Turbines | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Name: Westwind Wind Turbines Place: Northern Ireland, United Kingdom Zip: BT29 4TF Sector: Wind energy Product: Northern Ireland based small scale wind...

374

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

Science Journals Connector (OSTI)

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

Chien Wang; Ronald G Prinn

2011-01-01T23:59:59.000Z

375

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

376

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

377

DOE Wind Program to Host Booth at Offshore WINDPOWER | Department...  

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

DOE Wind Program to Host Booth at Offshore WINDPOWER DOE Wind Program to Host Booth at Offshore WINDPOWER September 12, 2014 - 10:16am Addthis The Department of Energy's Wind...

378

Wind Success Stories | Department of Energy  

Office of Environmental Management (EM)

wind power more reliably. August 22, 2013 United States Launches First Grid-Connected Offshore Wind Turbine EERE investments help nation take first step toward offshore wind in...

379

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.

380

American Wind Energy Association Offshore WINDPOWER Conference & Exhibition  

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

AWEA Offshore WINDPOWER 2014 Conference & Exhibition is the largest offshore wind energy event in North America. The conference and exhibition will be held at the Atlantic City Convention...

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

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

382

Current Challenges in Wind Turbine Tribology | Argonne National...  

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

Current Challenges in Wind Turbine Tribology Presented by Gary Doll of the University of Akron at the Wind Turbine Tribology Seminar 2014. Tribological Challenges in Wind Turbine...

383

Energy 101: Wind Turbines | Department of Energy  

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

Wind Turbines Wind Turbines Energy 101: Wind Turbines Addthis Description 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. Duration 2:16 Topic Tax Credits, Rebates, Savings Wind Energy Economy Credit Energy Department Video MR. : We've all seen those creaky old windmills on farms, and although they may seem about as low-tech as you can get, those old windmills are the predecessors for new modern wind turbines that generate electricity. The same wind that used to pump water for cattle is now turning giant wind turbines to power cities and homes. OK, have a look at this wind farm in the California desert, a hot desert next to tall mountains - an ideal place for a lot of wind.

384

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

385

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

SciTech Connect

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

386

2012 Wind Technologies Market Report  

E-Print Network (OSTI)

prototype floating offshore wind turbine was deployed. AlsoWind Technologies Market Report No Commercial Offshore Turbineswind turbine nacelle assembly capacity; Charlie Bloch, Terese Decker, and Bruce Hamilton (Navigant Consulting) for assistance with the section on offshore

Wiser, Ryan

2014-01-01T23:59:59.000Z

387

On modelling of grouped reliability data for wind turbines  

Science Journals Connector (OSTI)

......Special Issue Maintenance Modelling...data for wind turbines F. P. A...generation by wind turbines (WTs) has...turbines or maintenance activities...generation by wind turbines (WTs) has...turbines or maintenance activities......

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

2010-10-01T23:59:59.000Z

388

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...

389

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

390

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

391

Energy 101: Wind Turbines | Department of Energy  

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

Wind Turbines Wind Turbines Energy 101: Wind Turbines Addthis Below is the text version for the Energy 101: Wind Turbines video. The video opens with "Energy 101: Wind Turbines." This is followed by wooden windmills on farms. We've all seen those creaky, old windmills on farms. And although they may seem about as low-tech as you can get, those old windmills are the predecessors for new, modern wind turbines that generat electricity. The video pans through shots of large windmills and wind farms of different sizes, situated on cultivated plains and hills. The same wind that used to pump water for cattle is now turning giant wind turbines to power cities and homes. OK, have a look at this wind farm in the California desert. A hot desert, next to tall mountains. An ideal place for a lot of wind.

392

WINDExchange: Siting Wind Turbines  

Wind Powering America (EERE)

Wind Wildlife Institute (AWWI) facilitates timely and responsible development of wind energy, while protecting wildlife and wildlife habitat. AWWI was created and is sustained by...

393

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

Science Journals Connector (OSTI)

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

Philip E. Hancock; Frauke Pascheke

2014-04-01T23:59:59.000Z

394

Maglev Wind Turbine Technologies | Open Energy Information  

Open Energy Info (EERE)

Maglev Wind Turbine Technologies Maglev Wind Turbine Technologies Jump to: navigation, search Name Maglev Wind Turbine Technologies Place Sierra Vista, Arizona Zip 85635 Sector Wind energy Product The new company employs magnetic levitation (Maglev) technology in its wind turbines, which it says will have a longer life span, be cheaper to build, and produce 1GW of energy each. References Maglev Wind Turbine Technologies[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Maglev Wind Turbine Technologies is a company located in Sierra Vista, Arizona . References ↑ "Maglev Wind Turbine Technologies" Retrieved from "http://en.openei.org/w/index.php?title=Maglev_Wind_Turbine_Technologies&oldid=348578"

395

NREL: Wind Research - Advanced Research Turbines  

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

Research Turbines Two 440 foot meteorological towers are upwind of two research wind turbines. Two 600-kW Westinghouse turbines at the NWTC are used to test new control schemes...

396

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

397

Building the Basic PVC Wind Turbine  

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

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....

398

Managing long-term environmental aspects of wind turbines: a prospective case study  

Science Journals Connector (OSTI)

This paper describes a method for mapping and mitigating the negative environmental impacts of wind turbines and provides an analysis of future removal and recycling processes of offshore wind turbines. The time horizon is up to 2050. The method is process-oriented and interactive with respect to the participation of the actors involved in this area. It recognises the dynamic, uncertain and rapidly changing character of wind energy and deals systematically with the future removal and recycling of wind turbines and future wind turbine technologies. The method combines life cycle assessment and technology foresight methods and integrates the perspectives of the present and the future.

Per Dannemand Andersen; Mads Borup; Thomas Krogh

2007-01-01T23:59:59.000Z

399

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.

400

2012 & 2013 Offshore Wind Market & Economic Analysis Reports  

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

The objective of these report is to provide a comprehensive annual assessment of the U.S. offshore wind market. Available for download are the 2012 & 2013 Offshore Wind Market & Economic Analysis full reports prepared by Navigant Consulting.

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

New DOE Report Investigates Port Readiness for Offshore Wind...  

Energy Savers (EERE)

New DOE Report Investigates Port Readiness for Offshore Wind New DOE Report Investigates Port Readiness for Offshore Wind October 1, 2013 - 1:22pm Addthis This is an excerpt from...

402

National Offshore Wind Energy Grid Interconnection Study (NOWEGIS)  

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

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.

403

New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities  

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

The Energy Department today released the first National Offshore Wind Energy Grid Interconnection Study that investigated the key economic and technological factors that will influence the integration of offshore wind energy onto the national grid.

404

Wind Program to Host Exhibit Booth at AWEA's Offshore WINDPOWER...  

Energy Savers (EERE)

Wind Program to Host Exhibit Booth at AWEA's Offshore WINDPOWER Wind Program to Host Exhibit Booth at AWEA's Offshore WINDPOWER October 1, 2012 - 11:15am Addthis This is an excerpt...

405

Department of Energy Awards $43 Million to Spur Offshore Wind...  

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

Department of Energy Awards 43 Million to Spur Offshore Wind Energy Department of Energy Awards 43 Million to Spur Offshore Wind Energy October 3, 2011 - 12:00pm Addthis This is...

406

Smooth Transition Between Controllers for Floating Wind Turbines  

Science Journals Connector (OSTI)

This paper presents a novel wind turbine control system which gives a smooth power output during transitions between different controllers. The paper presents an implementation of a control system designed for an offshore ?oating wind turbine using a linear Model Predictive Control approach.The performance is investigated in computer simulations, with emphasis on stability in the tower fore–aft motion and behaviour during transition between controllers. The results clearly demonstrate that the wind turbine using the proposed algorithm for smooth transition indeed exhibits a smooth system behaviour. In comparison to a case with sudden transition, the behaviour is found to be signi?cantly improved. Moreover, tower oscillations are found to be stable, by virtue of the controller prediction horizon exceeding the natural periodicity of the tower oscillations.Smooth system behaviour is important to increase the lifetime of critical parts of the turbine. With increasing turbine sizes such considerations are of increasing importance, making the results obtained in this paper of particular relevance for large wind turbines, both onshore and offshore.

Eivind Lindeberg; Harald G Svendsen; Kjetil Uhlen

2012-01-01T23:59:59.000Z

407

Energy 101: Wind Turbines- 2014 Update  

Office of Energy Efficiency and Renewable Energy (EERE)

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.

408

Visual impact assessment of offshore wind farms and prior experience  

Science Journals Connector (OSTI)

Energy planners have shifted their attention towards offshore wind power generation and the decision is supported by the public in general, which in the literature has a positive attitude towards offshore wind generation. However, globally only a few offshore wind farms are operating. As more wind farms start operating and more people become experienced with especially the visual impacts from offshore wind farms, the public positive attitude could change if the experienced impacts are different from the initially perceived visual interference. Using a binary logit model, the present paper investigates the relation between different levels of prior experience with visual disamenities from offshore wind farms and perception of visual impacts from offshore wind farms. The differences in prior experience are systematically controlled for sampling respondents living in the areas close to the large scale offshore wind farms Nysted and Horns Rev and by sampling the a group of respondents representing the Danish population, which has little experience with offshore wind farms. Compared to previous results in the literature, the present paper finds that perception of wind power generation is influenced by prior experience. More specifically, the results show that people with experience from offshore wind farms located far from the coast have a significant more positive perception of the visual impacts from offshore wind farms than people with experience from wind farms located closer to the coast. These results are noteworthy on two levels. First of all, the results show that perceptions of offshore wind generation are systematically significantly influenced by prior experience with offshore wind farms. Secondly, and in a policy context, the results indicate that the future acceptance of future offshore wind farms is not independent of the location of existing and new offshore wind farms. This poses for caution in relation to locating offshore wind farms too close to the coast.

Jacob Ladenburg

2009-01-01T23:59:59.000Z

409

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

SciTech Connect

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

410

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

411

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 to model, optimize and design wind turbines" and it has been used as a general developer tool for other

412

Global Offshore Wind Farms Database | Open Energy Information  

Open Energy Info (EERE)

Global Offshore Wind Farms Database Global Offshore Wind Farms Database Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Global Offshore Wind Farms Database Focus Area: Renewable Energy Topics: Deployment Data Website: www.4coffshore.com/offshorewind/ Equivalent URI: cleanenergysolutions.org/content/global-offshore-wind-farms-database,h Language: English Policies: Deployment Programs DeploymentPrograms: Technical Assistance This online database and interactive map for global offshore wind development contains details on over 900 wind farms in 36 countries. The 4C Offshore Interactive Map provides an interactive map-based view of wind farm data, as well as wind farm-related news and career information. References Retrieved from "http://en.openei.org/w/index.php?title=Global_Offshore_Wind_Farms_Database&oldid=514428"

413

Avian collision risk at an offshore wind farm  

Science Journals Connector (OSTI)

...research-article Avian collision risk at an offshore wind farm Mark Desholm * Johnny Kahlert...can detect and avoid a large offshore wind farm by tracking their diurnal migration...waters. At present, two large offshore wind farms operate in Denmark, one of...

2005-01-01T23:59:59.000Z

414

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

415

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

416

NREL Assesses National Design Standards for Offshore Wind (Fact...  

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

summarizes regulations, standards, and guidelines for the design and operation of offshore wind projects in the United States. In 2012, the American Wind Energy Association...

417

Sandia National Laboratories: Offshore Wind RD&D: Sediment Transport  

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

Wind RD&D: Sediment Transport Offshore Wind RD&D: Sediment Transport This project focuses on three technical areas Flow chart of sediment stability risk assessment methodology....

418

Technical and economic analysis of US offshore wind power.  

E-Print Network (OSTI)

??Wind power is the fastest growing sector of electricity generation in the world and the development of offshore wind resources is an increasingly important component… (more)

McDaniel Wyman, Constance Annette

2014-01-01T23:59:59.000Z

419

Offshore wind energy integration in the European power system.  

E-Print Network (OSTI)

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

Peña, Juan Julián Peiró

2008-01-01T23:59:59.000Z

420

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 turbine" 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

Reliability analysis of wind turbine at high uncertain wind;.  

E-Print Network (OSTI)

??Wind energy plays a vital role in the renewable energy scenario of newlinethe world The wind turbine systems have complex components which are newlinerepairable The… (more)

Sunder selwyn T

2014-01-01T23:59:59.000Z

422

Salazar, Chu Announce Major Offshore Wind Initiatives | Department of  

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

Major Offshore Wind Initiatives Major Offshore Wind Initiatives Salazar, Chu Announce Major Offshore Wind Initiatives February 7, 2011 - 12:00am Addthis NORFOLK, VA - Unveiling a coordinated strategic plan to accelerate the development of offshore wind energy, Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu today announced major steps forward in support of offshore wind energy in the United States, including new funding opportunities for up to $50.5 million for projects that support offshore wind energy deployment and several high priority Wind Energy Areas in the mid-Atlantic that will spur rapid, responsible development of this abundant renewable resource. Deployment of clean, renewable offshore wind energy will help meet the President's goal of generating 80 percent of the Nation's electricity from

423

Operational Impacts of Large Deployments of Offshore Wind (Poster)  

SciTech Connect

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

Ibanez, E.; Heaney, M.

2014-10-01T23:59:59.000Z

424

Coupled multi-body dynamics and CFD for wind turbine simulation including explicit wind turbulence  

Science Journals Connector (OSTI)

Abstract A high fidelity approach for wind turbine aero-elastic simulations including explicit representation of the atmospheric wind turbulence is presented. The approach uses a dynamic overset computational fluid dynamics (CFD) code for the aerodynamics coupled with a multi-body dynamics (MBD) code for the motion responses to the aerodynamic loads. Mann's wind turbulence model was implemented into the CFD code as boundary and initial conditions. The wind turbulence model was validated by comparing the theoretical one-point spectrum for the three components of the velocity fluctuations, and by comparing the expected statistics from the CFD simulated wind turbulent field with the explicit wind turbulence inlet boundary from Mann model. Extensive simulations based on the proposed coupled approach were conducted with the conceptual NREL 5-MW offshore wind turbine in an increasing level of complexity, analyzing the turbine behavior as elasticity, wind shear and atmospheric wind turbulence are added to the simulations. Results are compared with the publicly available simulations results from OC3 participants, showing good agreement for the aerodynamic loads and blade tip deflections in time and frequency domains. Wind turbulence/turbine interaction was examined for the wake flow. It was found that explicit turbulence addition results in considerably increased wake diffusion. The coupled CFD/MBD approach can be extended to include multibody models of the shaft, bearings, gearbox and generator, resulting in a promising tool for wind turbine design under complex operational environments.

Y. Li; A.M. Castro; T. Sinokrot; W. Prescott; P.M. Carrica

2015-01-01T23:59:59.000Z

425

Midsize Wind Turbines for the U.S. Community Wind Market | Department...  

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

Midsize Wind Turbines for the U.S. Community Wind Market Midsize Wind Turbines for the U.S. Community Wind Market Midsize Wind Turbines for the U.S. Community Wind Market More...

426

Stakeholder Engagement and Outreach: Siting Wind Turbines  

Wind Powering America (EERE)

Resources & Tools Resources & Tools Siting Wind Turbines Wind Powering America works to increase deployment of wind energy. This page provides resources about wind turbine siting. American Wind Wildlife Institute The American Wind Wildlife Institute (AWWI) facilitates timely and responsible development of wind energy, while protecting wildlife and wildlife habitat. AWWI was created and is sustained by a unique collaboration of environmentalists, conservationists, state wildlife agencies, and wind industry leaders. Its purpose is to help lay the scientific groundwork and best practices for wind farm siting and operations, through targeted initiatives: wind-wildlife research, landscape assessment, mitigation, and education. Ordinances Regulating Development of Commercial Wind Energy Facilities

427

Overcoming Challenges in America's Offshore Wind Industry | Department of  

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

Overcoming Challenges in America's Offshore Wind Industry Overcoming Challenges in America's Offshore Wind Industry Overcoming Challenges in America's Offshore Wind Industry November 18, 2013 - 4:40pm Addthis Deputy Assistant Secretary for Renewable Energy Steven Chalk speaks during the American Wind Energy Association WINDPOWER Offshore conference in Providence, Rhode Island. | Photo courtesy of American Wind Energy Association Deputy Assistant Secretary for Renewable Energy Steven Chalk speaks during the American Wind Energy Association WINDPOWER Offshore conference in Providence, Rhode Island. | Photo courtesy of American Wind Energy Association Gregory M. Matzat PE; Senior Advisor, Offshore Wind Technologies A year of progress, preparation and promise was the theme connecting two days of panels and presentations last month at the 2013 American Wind

428

Definition: Wind turbine | Open Energy Information  

Open Energy Info (EERE)

turbine turbine Jump to: navigation, search Dictionary.png Wind turbine A machine that converts wind energy to mechanical energy; typically connected to a generator to produce electricity.[1][2] View on Wikipedia Wikipedia Definition A wind turbine is a device that converts kinetic energy from the wind, also called wind energy, into mechanical energy in a process known as wind power. If the mechanical energy is used to produce electricity, the device may be called a wind turbine or wind power plant. If the mechanical energy is used to drive machinery, such as for grinding grain or pumping water, the device is called a windmill or wind pump. Similarly, it may be referred to as a wind charger when used for charging batteries. The result of over a millennium of windmill development and modern engineering,

429

Utility-Scale Wind Turbines | Open Energy Information  

Open Energy Info (EERE)

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

430

How Does a Wind Turbine Work? | Department of Energy  

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

Work? How Does a Wind Turbine Work? How does a wind turbine work? Previous Next Wind turbines operate on a simple principle. The energy in the wind turns two or three...

431

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

432

NREL: Learning - Wind Energy Basics: How Wind Turbines Work  

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

Wind Energy Basics: How Wind Turbines Work Wind Energy Basics: How Wind Turbines Work We have been harnessing the wind's energy for hundreds of years. From old Holland to farms in the United States, windmills have been used for pumping water or grinding grain. Today, the windmill's modern equivalent-a wind turbine-can use the wind's energy to generate electricity. Wind turbines, like windmills, are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more aboveground, they can take advantage of the faster and less turbulent wind. Turbines catch the wind's energy with their propeller-like blades. Usually, two or three blades are mounted on a shaft to form a rotor. A blade acts much like an airplane wing. When the wind blows, a pocket of low-pressure air forms on the downwind side of the blade. The low-pressure

433

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.

434

Garden State Offshore Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Farm Offshore Wind Farm Jump to: navigation, search Name Garden State Offshore Wind Farm Facility Garden State Offshore Wind Farm Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Developer Garden State Offshore Energy Location Offshore from Avalon NJ Coordinates 39.08°, -74.310556° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.08,"lon":-74.310556,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

435

On the Fatigue Analysis of Wind Turbines  

SciTech Connect

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

436

Wind Turbine Manufacturing Process Monitoring  

SciTech Connect

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

437

Wind Turbines for Marine Propulsion  

Science Journals Connector (OSTI)

ABSTRACT The design and construction of an horizontal axis wind turbine drive for a small yacht is described. This system has been designed to test the performance of this novel type of propulsion for use in commercial shipping, the fisheries industry and for the recreational market. The use of wind turbines to harness the power available from the wind for propulsion purposes offers a number of distinct advantages over other wind propulsion systems. Propulsion is achieved in all directions of travel relative to the wind. Complete control of the system can be arranged from a remote control position such as the ships bridge. This control can be achieved with a small crew because of the opportunities for applying powered and automated control systems. The way in which each of these features is achieved, together with details of the rotor, shafting and gear-train arrangements are described here. An indication is given of the theoretical performance of the yacht under this form of propulsion.

N. Bose; R.C. McGregor

1984-01-01T23:59:59.000Z

438

Performance of propeller wind turbines  

SciTech Connect

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

439

NREL: Wind Research - Offshore Design Tools and Methods  

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

Design Tools and Methods Design Tools and Methods Graphic of a modular depiction of the FAST tool, which includes aerodynamics, hydrodynamics, control and electrical system dynamics, and structural dynamics modules. NREL's CAE Tool, FAST, and its Sub-Modules Illustration of wind turbines in various environments including land-based, shallow water (0-30m), transitional depth (30-60m), and deep water floating (greater than 60m). FAST has the capability of modeling a wide range of offshore wind system configurations including shallow water, transitional depth, and floating systems. With DOE's support, NREL has developed and maintains a robust, open-source, modular computer-aided engineering (CAE) tool, known as FAST. It has state-of-the-art capabilities for full dynamic system simulation over a

440

Rhode Island Offshore Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Island Offshore Wind Farm Island Offshore Wind Farm Jump to: navigation, search Name Rhode Island Offshore Wind Farm Facility Rhode Island Offshore Wind Farm Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Developer Deepwater Wind Location Offshore from Sakonnet RI Coordinates 40.96°, -71.44° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.96,"lon":-71.44,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

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

Energy 101: Wind Turbines | Department of Energy  

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

Wind Turbines Wind Turbines Energy 101: Wind Turbines July 30, 2010 - 10:47am Addthis John Schueler John Schueler Former New Media Specialist, Office of Public Affairs On Tuesday, the Department announced a $117 million loan guarantee through for the Kahuku Wind Power Project in Hawaii. That's a major step forward for clean energy in the region, as it's expected to supply clean electricity to roughly 7,700 households per year, and it also invites a deceptively simple question: how exactly do wind turbines generate electricity? One thing you might not realize is that wind is actually a form of solar energy. This is because wind is produced by the sun heating Earth's atmosphere, the rotation of the earth, and the earth's surface irregularities. Wind turbines are the rotary devices that convert the

442

Obama Administration Hosts Great Lakes Offshore Wind Workshop in Chicago  

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

Hosts Great Lakes Offshore Wind Workshop in Hosts Great Lakes Offshore Wind Workshop in Chicago with Great Lakes Wind Collaborative Obama Administration Hosts Great Lakes Offshore Wind Workshop in Chicago with Great Lakes Wind Collaborative October 28, 2010 - 12:00am Addthis WASHINGTON - The White House Council on Environmental Quality and the U.S. Department of Energy hosted a workshop with the Great Lakes Wind Collaborative in Chicago on October 26 - 27, 2010, focused on the siting of offshore wind power in the Great Lakes. The two day workshop brought together wind developers, Federal and state regulators, environmental advocates, and other regional stakeholders to discuss methods for ensuring greater clarity, certainty and coordination of Federal and state decision-making for offshore wind development in the Great Lakes.

443

Tribological advancements for reliable wind turbine performance  

Science Journals Connector (OSTI)

...the gearbox components. Wind turbine gearboxes experience...the generators to the power grid, respectively...can produce a torsional wind-up of the components...Pontius2009Main shaft support for wind turbine with a fixed and...44061999 Hydraulic fluid power-fluids-method of coding...

2010-01-01T23:59:59.000Z

444

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

445

NREL: Wind Research - Mariah Power's Windspire Wind Turbine Testing and  

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

Mariah Power's Windspire Wind Turbine Testing and Results Mariah Power's Windspire Wind Turbine Testing and Results A video of Mariah Power's Windspire wind turbine. Text Version As part of the National Renewable Energy Laboratory and U.S. Department of Energy (NREL/DOE) Independent Testing project, NREL tested Mariah Power's Windspire Giromill small wind turbine at the National Wind Technology Center (NWTC) through January 14, 2009 when NREL terminated its testing. Read a chronology of events and letter from Mariah Power to NREL. The Windspire is a 1.2-kilowatt (kW) vertical-axis small wind turbine. The turbine tower is 9.1 meters tall, and its rotor area is 1.2 by 6.1 meters. The turbine has a permanent-magnet generator with a single-phase output at 120 volts AC. Testing Summary Testing was terminated January 14, 2009. Published test reports include

446

Global potential for wind-generated electricity  

Science Journals Connector (OSTI)

...6 MW, deployed offshore, reflecting the greater...incentive to deploy larger turbines to capture the higher wind speeds available in...Electricity-Producing Wind Turbines ( International Electrotechnical...2008 ) Assessing offshore wind resources: An accessible...

Xi Lu; Michael B. McElroy; Juha Kiviluoma

2009-01-01T23:59:59.000Z

447

Structural Analyses of Wind Turbine Tower for 3 kW Horizontal Axis Wind Turbine.  

E-Print Network (OSTI)

?? Structure analyses of a steel tower for Cal Poly's 3 kW small wind turbine is presented. First, some general design aspects of the wind… (more)

Gwon, Tae gyun (Tom)

2011-01-01T23:59:59.000Z

448

Stakeholder Engagement and Outreach: Wind Turbine Ordinances  

Wind Powering America (EERE)

Information Information Resources Printable Version Bookmark and Share Publications Success Stories Webinars Podcasts Videos Stakeholder Interviews Lessons Learned Wind Working Groups Economic Impact Studies Wind Turbine Ordinances Wind Turbine Ordinances This page lists 135 state and local wind turbine ordinances. State and local governments and policymakers can use this collection of example wind turbine ordinances when drafting a new wind energy ordinance in a town or county without existing ordinances. Due to increasing energy demands in the United States and more installed wind projects, rural communities and local governments with limited or no experience with wind energy now have the opportunity to become involved in this industry. Communities with good wind resources may be approached by

449

Aeroelastic simulation of wind turbine blades  

Science Journals Connector (OSTI)

The aim of this chapter is to compute dynamic stresses acting on wind turbine blades. These stresses are essential in predicting fatigue of the rotor.

Z.L. Mahri; M.S. Rouabah; Z. Said

2009-01-01T23:59:59.000Z

450

Robotic Wind Turbine Inspection | GE Global Research  

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

Trials GE Global Research is advancing technology that will make the inspection of wind turbines faster and more reliable for customers. Currently, an inspector examines the...

451

Dynamic Response of Floating Wind Turbines.  

E-Print Network (OSTI)

?? In this thesis the extreme values of tension in the mooring lines on Hywind Demo is investigated. Hywind Demo is a floating wind turbine… (more)

Neuenkirchen Godø, Sjur

2013-01-01T23:59:59.000Z

452

New Reports Chart Offshore Wind's Path Forward | Department of Energy  

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

Reports Chart Offshore Wind's Path Forward Reports Chart Offshore Wind's Path Forward New Reports Chart Offshore Wind's Path Forward December 12, 2012 - 2:29pm Addthis Taking a look at the challenges and opportunities that lie ahead as the U.S. prepares to enter the offshore wind market. Click here to view the full infographic. | Infographic by Sarah Gerrity. Taking a look at the challenges and opportunities that lie ahead as the U.S. prepares to enter the offshore wind market. Click here to view the full infographic. | Infographic by Sarah Gerrity. Taking a look at the challenges and opportunities that lie ahead as the U.S. prepares to enter the offshore wind market. Click here to view the full infographic. | Infographic by Sarah Gerrity.

453

Blowing in the Wind ...Offshore | Department of Energy  

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

Blowing in the Wind ...Offshore Blowing in the Wind ...Offshore Blowing in the Wind ...Offshore February 10, 2011 - 9:28am Addthis Cathy Zoi Former Assistant Secretary, Office of Energy Efficiency & Renewable Energy What will this project do? The new offshore wind strategy lays out a path to potentially have 54 gigawatts of offshore wind capacity by 2030, enough to power more than 15 million homes with clean, renewable energy. Have you ever flown a kite at the beach? If you have, you know how breezy it can be. A few miles offshore, you'll find that the wind is even stronger and steadier. And it's like that all around the country. Along the eastern seaboard and west coast, in the Great Lakes and Gulf of Mexico, and even around Hawaii we have a massive clean energy resource waiting to

454

Mustang Island Offshore Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Mustang Island Offshore Wind Farm Mustang Island Offshore Wind Farm Jump to: navigation, search Name Mustang Island Offshore Wind Farm Facility Mustang Island Offshore Wind Farm Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Baryonyx Corporation Developer Baryonyx Corporation Location Offshore from Mustang Island TX Coordinates 27.66°, -97.01° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":27.66,"lon":-97.01,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

455

International Collaboration on Offshore Wind Energy Under IEA Annex XXIII  

SciTech Connect

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

456

Accuracy of the actuator disc-RANS approach for predicting the performance and wake of tidal turbines  

Science Journals Connector (OSTI)

...approach for modelling farms of tidal stream turbines...aerodynamic analysis of wind farms. J. Solar Energy Eng...ISOPE-2008: 18th Int. Offshore and Offshore and Polar...model simulations with offshore wind turbine wake profiles...

2013-01-01T23:59:59.000Z

457

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

458

Sandia National Laboratories: New Wind Turbine Blade Design  

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

459

Wind Turbine Transportation in Toyland | GE Global Research  

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

Edison's Desk > Wind Turbine Transportation in Toyland Wind Turbine Transportation in Toyland Charles (Burt) Theurer 2011.05.27 GE doesn't just make wind turbines. We also deliver...

460

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...

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

NREL Collaborates with SWAY on Offshore Wind Demonstration (Fact...  

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

consumer waste. NWTC researchers gain valuable data from one of the first floating offshore wind prototypes. The National Renewable Energy Laboratory (NREL) is collaborating...

462

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

Office of Environmental Management (EM)

DOE Announces Webinars on Economic Impacts of Offshore Wind, Overview of Energy Efficiency Conservation Loan Program, and More DOE Announces Webinars on Economic Impacts of...

463

NREL: Wind Research - New Report Characterizes Existing Offshore...  

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

New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities Study concludes a three-year collaborative investigation with positive outlooks for U.S.-based...

464

Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm  

E-Print Network (OSTI)

#12;Hard Bottom Substrate Monitoring Horns Rev Offshore Wind Farm Annual Status Report 2004............................................................................................................... 13 2.3. Test fishing.................................................................................................................................. 17 3.1. Fish observed

465

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

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

NREL Analyzes Floating Offshore Wind Technology for Statoil November 6, 2014 NREL engineers traveled to Oslo, Norway, to meet with Statoil representatives regarding NREL's analysis...

466

NREL: Wind Research - SWIFT Wind Turbine Testing and Results  

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

SWIFT Wind Turbine Testing and Results SWIFT Wind Turbine Testing and Results The SWIFT wind turbine. Text Version As part of the National Renewable Energy Laboratory and U.S. Department of Energy (NREL/DOE) Independent Testing project, NREL is testing the SWIFT small wind turbine at the National Wind Technology Center (NWTC). The competitive grant was awarded to Cascade Engineering. The SWIFT is a 1-kilowatt (kW), five-bladed with outer ring, horizontal-axis upwind small wind turbine. The turbine's rotor diameter is 2 meters, and its hub height is 13.72 meters. The SWIFT uses a single-phase permanent-magnet generator rated at 1 kW grid connected through an inverter at 240 volts AC. Testing Summary Supporting data and explanations for data provided in this table will be provided in the final reports. Data presented are preliminary and subject

467

How Does a Wind Turbine Work?  

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

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

468

How Does a Wind Turbine Work?  

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

469

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.

470

Chu, Salazar to Announce Major Offshore Wind Energy Initiatives |  

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

Salazar to Announce Major Offshore Wind Energy Initiatives Salazar to Announce Major Offshore Wind Energy Initiatives Chu, Salazar to Announce Major Offshore Wind Energy Initiatives February 4, 2011 - 12:00am Addthis NORFOLK,VA - On Monday, February 7, 2011 Energy Secretary Steven Chu and Secretary of the Interior Ken Salazar will announce major new initiatives to accelerate the responsible siting and development of offshore wind energy projects. WHAT: Offshore Wind Energy News Conference WHEN: Monday, February 7, 11:00 AM EST WHO: Steven Chu, Secretary of Energy Ken Salazar, Secretary of the Interior WHERE: Half Moone Center 11 Waterside Dr Norfolk, VA 23510 DIAL-IN: News media, state and local stakeholders, industry representatives and other interested parties can join a listen-only teleconference of the announcement by dialing 800-369-3311 and entering code: OFFSHORE.

471

NREL: Wind Research - Small and Distributed Wind Turbine Research  

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

research is to increase consumer confidence in and the number of certified small wind turbines on the market through certification testing, to improve performance, and to reduce...

472

Analysis and Optimisation of a Novel Wind Turbine .  

E-Print Network (OSTI)

??The technologies of urban wind turbines have been rapidly developed in recent years, but urban wind turbines have not found a wide application due to… (more)

Zhang, Xu

2014-01-01T23:59:59.000Z

473

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,...

474

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

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

475

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...

476

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

Energy Savers (EERE)

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...

477

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

478

Aerodynamic interference between two Darrieus wind turbines  

SciTech Connect

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

479

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

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

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...

480

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

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

Luther College Wind Turbine | Open Energy Information  

Open Energy Info (EERE)

Luther College Wind Turbine Luther College Wind Turbine Jump to: navigation, search Name Luther College Wind Turbine Facility Luther College Wind Turbine Sector Wind energy Facility Type Community Wind Facility Status In Service Owner Luther College Wind Energy Project LLC Developer Luther College Energy Purchaser Alliant Energy Location Decorah IA Coordinates 43.30919891°, -91.81617737° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.30919891,"lon":-91.81617737,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

482

Small Wind Turbine Certifications Signal Maturing Industry  

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

More than a dozen small wind turbine models have received certification to the U.S. industry standard from accredited certification bodies. This progress signals a maturing industry and that the DOE Wind Program is on track to reach its goal of certifying 40 turbine models by 2020.

483

NREL: Wind Research - Abundant Renewable Energy's ARE 442 Wind Turbine  

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

Abundant Renewable Energy's ARE 442 Wind Turbine Testing and Results Abundant Renewable Energy's ARE 442 Wind Turbine Testing and Results Get the Adobe Flash Player to see this video. A video of Abundant Renewable Energy's ARE 442 wind turbine. Text Version As part of the National Renewable Energy Laboratory and U.S. Department of Energy (NREL/DOE) Independent Testing project, NREL tested Abundant Renewable Energy's ARE 442 turbine at the National Wind Technology Center (NWTC). The ARE 442 is a 10-kilowatt (kW), three-bladed, horizontal-axis upwind small wind turbine. It has a hub height of 30.9 meters and a rotor diameter of 7.2 meters. The turbine has a single-phase permanent-magnet generator that operates at variable voltages up to 410 volts AC. Testing Summary The summary of the tests is below with the final reports.

484

Galveston Offshore Wind Phase 2 | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Phase 2 Offshore Wind Phase 2 Jump to: navigation, search Name Galveston Offshore Wind Phase 2 Facility Galveston Offshore Wind Phase 2 Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Coastal Point Energy LLC Developer Coastal Point Energy LLC Location Gulf of Mexico TX Coordinates 29.16°, -94.747° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.16,"lon":-94.747,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

485

Michigan Offshore Wind Pilot Project | Open Energy Information  

Open Energy Info (EERE)

Offshore Wind Pilot Project Offshore Wind Pilot Project Jump to: navigation, search Name Michigan Offshore Wind Pilot Project Facility Michigan Offshore Wind Pilot Project Sector Wind energy Facility Type Offshore Wind Facility Status Proposed Owner Mighigan Alternative and Renewable Energy Center Developer Mighigan Alternative and Renewable Energy Center Location Muskegon Lake MI Coordinates 43.231°, -86.307° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.231,"lon":-86.307,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

486

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

487

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

SciTech Connect

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

488

Developing Integrated National Design Standards for Offshore Wind Plants  

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

The DOE Wind Program and the National Renewable Energy Laboratory recently published a report that summarizes the regulations, standards, and guidelines for the design and operation of offshore wind projects in the United States.

489

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

490

Airborne sound propagation over sea during offshore wind farm piling  

Science Journals Connector (OSTI)

Offshore piling for wind farm construction has attracted a lot of attention in recent years due to the extremely high noise emission levels associated with such operations. While underwater noise levels were shown to be harmful for the marine biology the propagation of airborne piling noise over sea has not been studied in detail before. In this study detailed numerical calculations have been performed with the Green's Function Parabolic Equation (GFPE) method to estimate noise levels up to a distance of 10?km. Measured noise emission levels during piling of pinpiles for a jacket-foundation wind turbine were assessed and used together with combinations of the sea surface state and idealized vertical sound speed profiles (downwind sound propagation). Effective impedances were found and used to represent non-flat sea surfaces at low-wind sea states 2 3 and 4. Calculations show that scattering by a rough sea surface which decreases sound pressure levels exceeds refractive effects which increase sound pressure levels under downwind conditions. This suggests that the presence of wind even when blowing downwind to potential receivers is beneficial to increase the attenuation of piling sound over the sea. A fully flat sea surface therefore represents a worst-case scenario.

2014-01-01T23:59:59.000Z

491

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...

492

Wind Resource Mapping for United States Offshore Areas: Preprint  

SciTech Connect

The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) is producing validated wind resource maps for priority offshore regions of the United States. This report describes the methodology used to validate the maps and to build a Geographic Information Systems (GIS) database to classify the offshore wind resource by state, water depth, distance from shore, and administrative unit.

Elliott, D.; Schwartz, M.

2006-06-01T23:59:59.000Z

493

New Reports Highlight Major Potential in Offshore Wind Energy  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced a new report showing steady progress for the U.S. offshore wind energy industry over the past year. The report highlights 14 projects in advanced stages of development, together representing nearly 4,900 megawatts (MW) of potential offshore wind energy capacity for the United States.

494

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"

495

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

496

NREL GIS Data: Global Offshore Wind - Datasets - OpenEI Datasets  

Open Energy Info (EERE)

NREL GIS Data: Global ... Dataset Activity Stream NREL GIS Data: Global Offshore Wind GIS data for offshore wind speed (meterssecond). Specified to Exclusive Economic Zones (EEZ)....

497

Williams Stone Wind Turbine | Open Energy Information  

Open Energy Info (EERE)

Wind Turbine Wind Turbine Jump to: navigation, search Name Williams Stone Wind Turbine Facility Williams Stone Wind Turbine Sector Wind energy Facility Type Community Wind Facility Status In Service Owner Williams Stone Developer Sustainable Energy Developments Energy Purchaser Williams Stone Location Otis MA Coordinates 42.232526°, -73.070952° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.232526,"lon":-73.070952,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

498

Charlestown Wind Turbine | Open Energy Information  

Open Energy Info (EERE)

Charlestown Wind Turbine Charlestown Wind Turbine Jump to: navigation, search Name Charlestown Wind Turbine Facility Charlestown Wind Turbine Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MWRA Developer MWRA Energy Purchaser Distributed generation - net metered Location Boston MA Coordinates 42.39094522°, -71.07094288° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.39094522,"lon":-71.07094288,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

499

Nature's Classroom Wind Turbine | Open Energy Information  

Open Energy Info (EERE)

Nature's Classroom Wind Turbine Nature's Classroom Wind Turbine Jump to: navigation, search Name Nature's Classroom Wind Turbine Facility Nature's Classroom Wind Turbine Sector Wind energy Facility Type Small Scale Wind Facility Status In Service Owner Nature's Classroom Energy Purchaser Nature's Classroom Location Charlton MA Coordinates 42.113685°, -72.008475° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.113685,"lon":-72.008475,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

500

Meteorological aspects of siting large wind turbines  

SciTech Connect

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

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

1981-01-01T23:59:59.000Z