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Note: This page contains sample records for the topic "turbines ocean waves" from the National Library of EnergyBeta (NLEBeta).
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1

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

2

Aero-Acoustic Analysis of Wells Turbine for Ocean Wave Energy Conversion  

E-Print Network (OSTI)

Aero-Acoustic Analysis of Wells Turbine for Ocean Wave Energy Conversion Ralf Starzmann Fluid the water wave motion into a bi-directional air flow, which in turn drives an air turbine. The Wells turbine the environmental impact of an in situ Wells turbine in more detail requires an in depth understanding

Frandsen, Jannette B.

3

Ocean Wave Energy Systems Design: Conceptual Design Methodology for the Operational Matching of the Wells Air Turbine  

Science Journals Connector (OSTI)

The paper has set out a conceptual design methodology that was employed in the design of a Wells air turbine for OWC ocean wave energy plants. In particular, the ... sizing, given the range and frequency of power

2008-01-01T23:59:59.000Z

4

Aquantis Ocean Current Turbine Development Project Report  

SciTech Connect

The Aquantis® Current Plane (“C-Plane”) technology developed by Dehlsen Associates, LLC (DA) and Aquantis, Inc. is an ocean current turbine designed to extract kinetic energy from ocean currents. The technology is capable of achieving competitively priced base-load, continuous, and reliable power generation from a source of renewable energy not before possible in this scale or form.

Fleming, Alex J.

2014-08-23T23:59:59.000Z

5

Karhunen–Loeve representation of stochastic ocean waves  

Science Journals Connector (OSTI)

...stochastic ocean wave elevations and wind speed profiles is finally addressed...and design of fixed and floating offshore wind turbines and for the forecasting...wind speeds and power output of wind farms. 2. Spectral decomposition of...

2012-01-01T23:59:59.000Z

6

MHK Technologies/Hybrid wave Wind Wave pumps and turbins | Open Energy  

Open Energy Info (EERE)

Wind Wave pumps and turbins Wind Wave pumps and turbins < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Hybrid wave Wind Wave pumps and turbins.jpg Technology Profile Primary Organization Ocean Wave Wind Energy Ltd OWWE Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description 2Wave1Wind The hybrid wave power rig uses two wave converting technologies in addition to wind mills The main system is a pneumatic float in the category of overtopping as Wave Dragon In addition the pneumatic float can house point absorbers The hybrid wave power rig is based on the patented wave energy converter from 2005

7

GENERATING ELECTRICITY USING OCEAN WAVES  

E-Print Network (OSTI)

GENERATING ELECTRICITY USING OCEAN WAVES A RENEWABLE SOURCE OF ENERGY REPORT FOR THE HONG KONG ELECTRIC COMPANY LIMITED Dr L F Yeung Mr Paul Hodgson Dr Robin Bradbeer July 2007 #12;Ocean Waves and construction of equipment that could measure and log wave conditions and tide levels at Hoi Ha Wan. Prototypes

Bradbeer, Robin Sarah

8

MHK Technologies/Ocean Current Linear Turbine | Open Energy Information  

Open Energy Info (EERE)

Linear Turbine Linear Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Current Linear Turbine.jpg Technology Profile Primary Organization Ocean Energy Company LLC Technology Type Click here Seabed mooring system Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Endless cable loop with parachutes spliced to cable which moored in an ocean current pulls the cable through rotors which in turn power conventional electricity generators See US Patent 3 887 817 Additional patent pending Technology Dimensions Device Testing Date Submitted 30:08.6 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/Ocean_Current_Linear_Turbine&oldid=681618"

9

MHK Technologies/THOR Ocean Current Turbine | Open Energy Information  

Open Energy Info (EERE)

THOR Ocean Current Turbine THOR Ocean Current Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage THOR Ocean Current Turbine.jpg Technology Profile Primary Organization THOR Turner Hunt Ocean Renewable LLC Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description The THOR ocean current turbine ROCT is a tethered fully submersible hydrokinetic device with a single horizontal axis rotor that operates at constant speed by varying the depth of operation using a patented power feedback control technology Rotor diameters can reach 60 meters for a 2 0MW class turbine and operations can be conducted as deep as 250 meters Arrays of THOR s ROCTs can be located in outer continental shelf areas 15 to 100 miles offshore in well established ocean currents such as the Gulf Stream or the Kuroshio and deliver electrical power to onshore load centers via submarine transmission line

10

On Rayleigh Waves Across the Pacific Ocean  

Science Journals Connector (OSTI)

......research-article Articles On Rayleigh Waves Across the Pacific Ocean K. E. Bullen University College, Auckland, N. Z. ON RAYLEIGH WAVES ACROSS THE PACIFIC OCEAN K. E. Bullen (Received 1939November 9) The Bering......

K. E. Bullen

1939-12-01T23:59:59.000Z

11

Green Ocean Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Ocean Wave Air Piston This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleGreenOceanWaveEnergy&oldid769161...

12

Comparative study of turbines for wave energy conversion  

Science Journals Connector (OSTI)

The objective of this paper is to compare the performances of the turbines, which could be used for wave energy ... future, under various irregular wave conditions. The turbines included in the paper are as follo...

Hideaki Maeda; Toshiaki Setoguchi; Manabu Takao…

2001-03-01T23:59:59.000Z

13

Tabular icebergs in ocean waves  

Science Journals Connector (OSTI)

... in ocean waves. Two field seasons have been carried out by SPRI in cooperation with Norsk Polarinstitutt, and Foldvik et a/.11 have reported some measurements which took place during ... officers and the crew of the ship for their patience and help. We thank the Norsk Polarinstitutt (NP) and the Radio Echo Group at SPRI for loan of equipment, ...

Monica Kristensen; Vernon A. Squire; Stuart C. Moore

1982-06-24T23:59:59.000Z

14

Wavelet Spectrum Analysis and Ocean Wind Waves  

E-Print Network (OSTI)

Wavelet Spectrum Analysis and Ocean Wind Waves Paul C. Liu Abstract. Wavelet spectrum analysis is applied to a set of measured ocean wind waves data collected during the 1990 SWADE {Surface Wave Dynamics Experi- ment) program. The results reveal significantly new and previously unexplored Insights on wave

15

Dehlsen (TRL 5 6 System) - Aquantis C-Plane Ocean Current Turbine...  

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

Dehlsen (TRL 5 6 System) - Aquantis C-Plane Ocean Current Turbine Project Dehlsen (TRL 5 6 System) - Aquantis C-Plane Ocean Current Turbine Project Dehlsen (TRL 5 6 System) -...

16

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

17

MHK Technologies/Ocean Wave Air Piston | Open Energy Information  

Open Energy Info (EERE)

Piston Piston < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Wave Air Piston.jpg Technology Profile Primary Organization Green Ocean Wave Energy Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The OWAP captures power by continually raising or lowering a float which in turn raises or lowers one side of a lever arm about a stationary pivot point This therby raises or lowers a piston which is attached to the opposite side of the lever arm through a cylinder which in turn causes large volumes of air to move This air is funneled through drive turbines to produce power Mooring Configuration Monopile or platfrom

18

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

19

Mapping and Assessment of the United States Ocean Wave Energy...  

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

Mapping and Assessment of the United States Ocean Wave Energy Resource Mapping and Assessment of the United States Ocean Wave Energy Resource This report describes the analysis and...

20

MHK Technologies/Green Cat Wave Turbine | Open Energy Information  

Open Energy Info (EERE)

Wave Turbine Wave Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Green Cat Wave Turbine.jpg Technology Profile Primary Organization Green Cat Renewables Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The Green Cat Wave Turbine employs an extremely novel yet simple mechanical coupling to drive a multi pole Direct Drive generator Recent advances in permanent magnet materials and power electronic converters have opened up this extremely straightforward conversion route Unlike a number of devices currently being investigated this configuration enables maximum energy capture from both vertical and horizontal sea motions swell and surge respectively

Note: This page contains sample records for the topic "turbines ocean waves" 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

CHARACTERIZING DANGEROUS WAVES FOR OCEAN WAVE ENERGY CONVERTER SURVIVABILITY Justin Hovland  

E-Print Network (OSTI)

CHARACTERIZING DANGEROUS WAVES FOR OCEAN WAVE ENERGY CONVERTER SURVIVABILITY Justin Hovland ABSTRACT Ocean Wave Energy Converters (OWECs) operating on the water surface are subject to storms at station 139. Keywords: wave energy, survivability, breaking waves, joint distribution, OWEC INTRODUCTION

Haller, Merrick

22

Experimental analysis of an energy self sufficient ocean buoy utilizing a bi-directional turbine  

E-Print Network (OSTI)

An experimental analysis of a Venturi shrouded hydro turbine for wave energy conversion. The turbine is designed to meet the specific power requirements of a, Woods Hole Oceanographic Institute offshore monitoring buoy ...

Gruber, Timothy J. (Timothy James)

2012-01-01T23:59:59.000Z

23

Internal Waves in the Ocean  

Science Journals Connector (OSTI)

Salinity temperature and pressure gradients all cause the density of sea water to vary with depth in the ocean and the density gradient affects the motion of the waters. A quantity N having the units radians per second can be defined using the density gradient the velocity of sound and the acceleration of gravity.

Carl Eckart

1961-01-01T23:59:59.000Z

24

Ocean Wave Converters: State of the Art and Current Status  

E-Print Network (OSTI)

Ocean Wave Converters: State of the Art and Current Status M.S. Lagoun1,2 , A. Benalia2 and M in one of the following categories: wave energy, marine and tidal current energy, ocean thermal energy of energy exists in oceans. Ocean energy exists in many forms. Among these forms, significant opportunities

Paris-Sud XI, Université de

25

Mapping and Assessment of the United States Ocean Wave Energy...  

Open Energy Info (EERE)

Mapping and Assessment of the United States Ocean Wave Energy Resource This project estimates the naturally available and technically recoverable U.S. wave energy resources, using...

26

A numerical study for the optimal arrangement of ocean current turbine generators in the ocean current power parks  

Science Journals Connector (OSTI)

The present paper deals with the investigation of the flow distribution in the ocean current power park in order to optimize the arrangement of the turbine generators in the sea and the lake sides. To produce more reliable results, the detailed geometry of the ocean current generators is included in the computational domain with frozen rotor method to consider rotating effect. The numerical results show the details of flow distribution in the ocean current power park and propose the appropriate arrangement of the turbine generators for the efficient operation, which is essential for possible maximum power generation.

Seung Ho Lee; Sang Hyuk Lee; Kyungsoo Jang; Jungeun Lee; Nahmkeon Hur

2010-01-01T23:59:59.000Z

27

Floating type ocean wave power station equipped with hydroelectric unit  

Science Journals Connector (OSTI)

The authors have invented the unique ocean wave power station, which is composed of the floating ... wave pitch and the counter-rotating type wave power unit, its runners are submerged in the ... as requested, be...

Shun Okamoto; Toshiaki Kanemoto; Toshihiko Umekage

2013-10-01T23:59:59.000Z

28

Energy Absorption from Ocean Waves: A Free Ride for Cetaceans  

Science Journals Connector (OSTI)

...cetaceans are capable of absorbing energy from ocean waves for propulsion. The extent of...following seas. Consequences of wave-energy absorption for energetics of...following seas. Consequences of wave-energy absorption for energetics of...

1990-01-01T23:59:59.000Z

29

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

30

Dynamics of Rossby waves in an ocean with inhomogeneous currents  

Science Journals Connector (OSTI)

A model for a two-layer ocean is applied to consider, in terms of ... theoretically analysed, with the depth of the ocean's upper layer much smaller than that ... studied the wave packet's interaction with the current

I. I. Karpatovich; G. K. Korotaev

1998-01-01T23:59:59.000Z

31

Wave–wave interactions and deep ocean acoustics  

Science Journals Connector (OSTI)

Deep ocean acoustics in the absence of shipping and wildlife is driven by surface processes. Best understood is the signal generated by non-linear surface wave interactions the Longuet-Higgins mechanism which dominates from 0.1 to 10?Hz and may be significant for another octave. For this source the spectral matrix of pressure and vector velocity is derived for points near the bottom of a deep ocean resting on an elastic half-space. In the absence of a bottom the ratios of matrix elements are universal constants. Bottom effects vitiate the usual “standing wave approximation ” but a weaker form of the approximation is shown to hold and this is used for numerical calculations. In the weak standing wave approximation the ratios of matrix elements are independent of the surface wave spectrum but depend on frequency and the propagation environment. Data from the Hawaii-2 Observatory are in excellent accord with the theory for frequencies between 0.1 and 1?Hz less so at higher frequencies. Insensitivity of the spectral ratios to wind and presumably waves is indeed observed in the data.

Z. Guralnik; J. Bourdelais; X. Zabalgogeazcoa; W. E. Farrell

2013-01-01T23:59:59.000Z

32

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

33

ISABE-2005-1214 Optimum Applications of Four-Port Wave Rotors for Gas Turbines Enhancement  

E-Print Network (OSTI)

1 ISABE-2005-1214 Optimum Applications of Four-Port Wave Rotors for Gas Turbines Enhancement Emmett investigations on wave rotor applications for gas turbines have been published, among them conceptual, analytical in the gas turbine industry. The results and conclusions are derived from a wide- range multi

Müller, Norbert

34

Estimating Internal Wave Energy Fluxes in the Ocean  

Science Journals Connector (OSTI)

Energy flux is a fundamental quantity for understanding internal wave generation, propagation, and dissipation. In this paper, the estimation of internal wave energy fluxes ?u?p?? from ocean observations that may be sparse in either time or depth ...

Jonathan D. Nash; Matthew H. Alford; Eric Kunze

2005-10-01T23:59:59.000Z

35

Zhiyu Jiang, Department of Marine Technology & Centre for Ships and Ocean Structures Dynamic response of wind turbines in fault and  

E-Print Network (OSTI)

response of wind turbines in fault and shutdown conditions Zhiyu Jiang Deptartment of Marine Technology://www.newscientist.com/blogs/onepercent/2011/12/why-did-a-wind-turbine-self-co.html #12;3 Zhiyu Jiang, Department of Marine Technology & Centre & Centre for Ships and Ocean Structures Control and protection of wind turbines Emergency shutdown Pitch

Nørvåg, Kjetil

36

Comparison and analysis of Envisat ASAR ocean wave spectra with buoy data in the northern Pacific Ocean  

Science Journals Connector (OSTI)

The validation and assessment of Envisat advanced synthetic aperture radar (ASAR) ocean wave spectra products are important to their application in ocean wave numerical predictions. Six-year ASAR wave ... co-loca...

Qifeng Ren ???; Jie Zhang ??…

2011-01-01T23:59:59.000Z

37

Energy harvesting from transverse ocean waves by a piezoelectric plate  

Science Journals Connector (OSTI)

Abstract An ocean wave energy harvester from the transverse wave motion of water particles is developed by the piezoelectric effects. The harvester is made of two horizontal cantilever plates attached by piezoelectric patches and fixed on a vertical rectangular column. To describe the energy harvesting process, a mathematical model is developed to calculate the output charge and voltage from the piezoelectric patches according to the Airy linear wave theory and the elastic beam model. The influences on the root mean square (RMS) of the generated power from the piezoelectric patches, such as the ocean depth, the harvester location under the ocean surface, the length of the cantilevers, the wave height, and the ratio of wave length to ocean depth, are discussed. Results show that the RMS increases with the increase in the length of cantilevers and the wave height, and decrease in the distance of the ocean surface to the cantilevers and the ratio of the wave length to ocean depth. As a result, an optimum ocean depth is obtained to achieve a maximum RMS at different harvester locations under the ocean surface. A value of the power up to 30 W can be realized for a practical transverse wave with the values of the ocean depth, wave length, wave height and harvester location under the ocean surface to be 10.6 m, 21.2 m, 4 m, and ?2 m, respectively. This research develops a novel technique leading to efficient and practical energy harvesting from transverse waves by piezoelectric energy harvesters that could be easily fixed on an offshore platform.

X.D. Xie; Q. Wang; N. Wu

2014-01-01T23:59:59.000Z

38

Scaled modeling and simulation of ocean wave linear generator buoy systems.  

E-Print Network (OSTI)

??Accurate scaled modeling and simulation are critical to advancing ocean wave linear generator buoys. A 100th scaled model of ocean wave generator buoy systems is… (more)

Gore, Ganesh P.

2006-01-01T23:59:59.000Z

39

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

40

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

Note: This page contains sample records for the topic "turbines ocean waves" 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

Transient Ocean Currents Induced by Wind and Growing Waves  

Science Journals Connector (OSTI)

A theoretical nonlinear model for wind- and wave-induced currents in a viscous, rotating ocean is developed. The analysis is based on a Lagrangian description of motion. The nonlinear drift problem is formulated such that the solution depends on ...

Jan Erik Weber; Arne Melsom

1993-02-01T23:59:59.000Z

42

Variability of Intraseasonal Kelvin Waves in the Equatorial Pacific Ocean  

Science Journals Connector (OSTI)

Previous observational work has demonstrated that the phase speed of oceanic equatorial Kelvin waves forced by the Madden–Julian oscillation (MJO) appears to vary substantially. Processes that are responsible for systematic changes in the phase ...

Toshiaki Shinoda; Paul E. Roundy; George N. Kiladis

2008-05-01T23:59:59.000Z

43

Modelling the Effect of Ocean Waves on the Atmospheric and Ocean Boundary Layers  

Science Journals Connector (OSTI)

Ocean waves, in addition to generating direct forces on fixed and floating offshore wind generator structures, also have significant indirect effects via their influence on the atmospheric and oceanic boundary layers above and below the water surface. In the atmospheric boundary layer the waves act as roughness elements, influencing the turbulent flow and the vertical wind speed profile, and induce oscillatory motions in the airflow. Spray droplets from breaking wave crests enhance structure corrosion, and may lead to icing under low-temperature conditions. Below the water surface, the air-sea momentum flux and mechanical energy flux, mediated by the waves and wave-generated turbulence, affect the vertical profiles of ocean current, temperature, and salinity. Effects include modifying the structural forces and dynamics, and the movement and dispersion of marine organisms, pollutants, and air bubbles generated by breaking waves, with consequences for fouling, corrosion, and environmental impact. Measurement of relevant airflow and ocean dynamical variables is also challenging, as near the water surface it is often necessary to use instruments mounted on moving measurement platforms. Modelling such boundary-layer effects is a complex task, as a result of feedbacks between the airflow, wave field, current field, and turbulence in the atmosphere and the ocean. We present results from a coupled model study of the North Sea and Norwegian Sea area. We employ a mesoscale atmosphere model (WRF) and a spectral wave model (WAM), running simultaneously and coupled using the open-source coupler MCEL which can interpolate between different model grids and time steps. To investigate the ocean boundary layer, one-dimensional model experiments were performed for an idealized Ekman layer and for locations in the North Sea, Atlantic Ocean, and the northern Pacific, using a version of the GOTM turbulence model, modified to take wave dynamics into account. Results show how the wave field alters the ocean's aerodynamic roughness and the air–sea momentum flux, depending on the relation between the surface wind speed and the propagation speed of the wave crests (the wave age). These effects will feed back into the airflow, wind speed and turbulence profile in the boundary layer. The ocean dynamics experiments showed results which compare favourably with field observations from the LOTUS3 and PROVESS experiments in the north Atlantic and North Sea, and Ocean Weather Station Papa in the Pacific Ocean.

Alastair D. Jenkins; Mostafa Bakhoday Paskyabi; Ilker Fer; Alok Gupta; Muralidhar Adakudlu

2012-01-01T23:59:59.000Z

44

Long Wave Resonance in Tropical Oceans and Implications on Climate: the Atlantic Ocean  

Science Journals Connector (OSTI)

A wavelet analysis is preferred to a complex EOF analysis to investigate the resonance of long waves in the tropical ocean. If the two methods are similar for ... typical frequency domain analyses, i.e. the power

Jean-Louis Pinault

2013-11-01T23:59:59.000Z

45

Self-organized Criticality Model for Ocean Internal Waves  

Science Journals Connector (OSTI)

In this paper, we present a simple spring-block model for ocean internal waves based on the self-organized criticality (SOC). The oscillations of the water blocks in the model display power-law behavior with an exponent of –2 in the frequency domain, which is similar to the current and sea water temperature spectra in the actual ocean and the universal Garrett and Munk deep ocean internal wave model [Geophysical Fluid Dynamics 2 (1972) 225; J. Geophys. Res. 80 (1975) 291]. The influence of the ratio of the driving force to the spring coefficient to SOC behaviors in the model is also discussed.

Wang Gang; Lin Min; Qiao Fang-Li; Hou Yi-Jun

2009-01-01T23:59:59.000Z

46

Beauty waves: an artistic representation of ocean waves using Bezier curves  

E-Print Network (OSTI)

In this thesis, we present a method for computing an artistic representation of ocean waves using Bezier curves. Wave forms are loosely based on procedural wave models and are designed to emulate those found in both art and nature. The wave forms...

Faulkner, Jay Allen

2007-04-25T23:59:59.000Z

47

Estimating the potential of ocean wave power resources  

Science Journals Connector (OSTI)

The realistic assessment of an ocean wave energy resource that can be converted to an electrical power at various offshore sites depends upon many factors, and these include estimating the resource recognizing the random nature of the site-specific wave field, and optimizing the power conversion from particular wave energy conversion devices. In order to better account for the uncertainty in wave power resource estimates, conditional probability distribution functions of wave power in a given sea-state are derived. Theoretical expressions for the deep and shallow water limits are derived and the role of spectral width is studied. The theoretical model estimates were compared with the statistics obtained from the wave-by-wave analysis of JONSWAP based ocean wave time-series. It was shown that the narrow-band approximation is appropriate when the variability due to wave period is negligible. The application of the short-term models in evaluating the long-term wave power resource at a site was illustrated using wave data measured off the California coast. The final example illustrates the procedure for incorporating the local wave data and the sea-state model together with a wave energy device to obtain an estimate of the potential wave energy that could be converted into a usable energy resource.

Amir H. Izadparast; John M. Niedzwecki

2011-01-01T23:59:59.000Z

48

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

49

Waves Transmission and Generation in Turbine Stages in a Combustion-Noise Framework  

E-Print Network (OSTI)

, the acoustic behavior of the turbine blade rows must be known to evaluate the noise due to combustionWaves Transmission and Generation in Turbine Stages in a Combustion-Noise Framework M. Leyko SNECMA-engines could have two different origins: (a) the well-known direct combustion noise,2 which is directly

Nicoud, Franck

50

Ocean 420 Physical Processes in the Ocean Project 6: Waves  

E-Print Network (OSTI)

that the storm generates 30 min period motion through interactions in the mixed layer. What angle from. The upper layer density is 1028 kg/m3, and the density is 1029 kg/m3 in the lower layer. a) A wind event generates an upwelling internal wave at 30N with a positive deviation in interface height of size 30m. What

Thompson, LuAnne

51

Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean...  

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

Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current, and In-Stream Hydrokinetic Power Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current,...

52

Mapping and Assessment of the United States Ocean Wave Energy Resource  

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

This report describes the analysis and results of a rigorous assessment of the United States ocean wave energy resource.

53

Tidal turbine representation in an ocean circulation model: Towards realistic applications  

Science Journals Connector (OSTI)

Abstract The present method proposes the use and adaptation of ocean circulation models as an assessment tool framework for tidal current turbine (TCT) array-layout optimization. By adapting both momentum and turbulence transport equations of an existing model, the present TCT representation method is proposed to extend the actuator disc concept to 3-D large scale ocean circulation models. Through the reproduction of experimental flume tests, this method has shown its ability to simulate accurately both momentum and turbulent wake interactions. In addition, through an up-scaling test, this method has shown to be applicable at any scale. Thanks to its short computational time, the present TCT representation method is a very promising basis for the development of a TCT array layout optimization tool. Furthermore, on the basis of the simulations performed for the present publication, a reflection on the quantification of the array layout effects on power assessment and device deployment strategy has been initiated.

Thomas Roc; Deborah Greaves; Kristen M. Thyng; Daniel C. Conley

2014-01-01T23:59:59.000Z

54

Wing Wave: Feasible, Alternative, Renewable, Electrical Energy Producing Ocean Floor System  

E-Print Network (OSTI)

Wing Wave: Feasible, Alternative, Renewable, Electrical Energy Producing Ocean Floor System Mark, alternative energy system to convert the circular motion of ocean waves as they propagate through the sea and feasible alternative, renewable, electrical energy producing subsea system. Index Terms--ocean energy, wave

Wood, Stephen L.

55

Oceanic Internal-Wave Field: Theory of Scale-Invariant Spectra YURI V. LVOV  

E-Print Network (OSTI)

of a nearly universal internal-wave energy spectrum in the ocean, first described by Garrett and Munk (Garrett framework that allows a detailed analysis of power-law spectra of internal waves in the ocean. WeOceanic Internal-Wave Field: Theory of Scale-Invariant Spectra YURI V. LVOV Rensselaer Polytechnic

Tabak, Esteban G.

56

Self Adaptive Air Turbine for Wave Energy Conversion Using Shutter Valve and OWC Heoght Control System  

SciTech Connect

An oscillating water column (OWC) is one of the most technically viable options for converting wave energy into useful electric power. The OWC system uses the wave energy to “push or pull” air through a high-speed turbine, as illustrated in Figure 1. The turbine is typically a bi-directional turbine, such as a Wells turbine or an advanced Dennis-Auld turbine, as developed by Oceanlinx Ltd. (Oceanlinx), a major developer of OWC systems and a major collaborator with Concepts NREC (CN) in Phase II of this STTR effort. Prior to awarding the STTR to CN, work was underway by CN and Oceanlinx to produce a mechanical linkage mechanism that can be cost-effectively manufactured, and can articulate turbine blades to improve wave energy capture. The articulation is controlled by monitoring the chamber pressure. Funding has been made available from the U.S. Department of Energy (DOE) to CN (DOE DE-FG-08GO18171) to co-share the development of a blade articulation mechanism for the purpose of increasing energy recovery. However, articulating the blades is only one of the many effective design improvements that can be made to the composite subsystems that constitute the turbine generator system.

Di Bella, Francis A

2014-09-29T23:59:59.000Z

57

MHK Technologies/Anaconda bulge tube drives turbine | Open Energy  

Open Energy Info (EERE)

Anaconda bulge tube drives turbine Anaconda bulge tube drives turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Anaconda bulge tube drives turbine.jpg Technology Profile Primary Organization Checkmate SeaEnergy Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description Anaconda uses a large water filled distensible rubber tube floating just beneath the ocean surface and oriented parallel to wave direction As a wave passes the bulge tube is lifted with the surrounding water and this causes a bulge wave to be excited which then passes down the tubes walls gathering energy from the ocean wave as it passes By matching the speed of the bulge wave to that of the sea wave resonance is achieved and high power capture becomes possible The bulge waves are then used to drive a turbine generator located at the stern of the device

58

Estimating Internal Wave Energy Fluxes in the Ocean JONATHAN D. NASH  

E-Print Network (OSTI)

Estimating Internal Wave Energy Fluxes in the Ocean JONATHAN D. NASH College of Oceanic FE u p cgE is a fundamental quan- tity in internal wave energetics to identify energy sources, wave propagation, and energy sinks. Internal wave radiation transports energy from the boundaries

Kurapov, Alexander

59

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

60

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

Note: This page contains sample records for the topic "turbines ocean waves" 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

Open Ocean Aquaculture & Wave Energy Site | Open Energy Information  

Open Energy Info (EERE)

Aquaculture & Wave Energy Site Aquaculture & Wave Energy Site Jump to: navigation, search Basic Specifications Facility Name Open Ocean Aquaculture & Wave Energy Site Overseeing Organization University of New Hampshire Hydrodynamics Hydrodynamic Testing Facility Type Offshore Berth Depth(m) 52.0 Cost(per day) Contact POC Special Physical Features The Offshore Mooring System is placed in 52m water depth with a subsurface attachment grid at 20m. The entire mooring system covers 36 acres of bottom. There are four 'bays' into which devices can be attached. Each bay is approximately 130m on a side. There is a database with ~10 years of wave data and other environmental parameters available. Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes

62

Turbines  

Science Journals Connector (OSTI)

... with his torical notes and some explanations of the principles involved in the working of turbines. This is fol lowed by three chapters on water-wheels, ... . This is fol lowed by three chapters on water-wheels, turbine pumps, and water ...

1922-02-09T23:59:59.000Z

63

A conceptual study of floating axis water current turbine for low-cost energy capturing from river, tide and ocean currents  

Science Journals Connector (OSTI)

The cost of utilizing kinetic energy of river stream, tidal and ocean current is considered to be higher than that of wind power generation because of difficulties in construction and maintenance of devices installed in seawater. As a solution to the problem, the authors propose a new concept of water stream turbine. The main idea is in the manner of supporting turbine. Although it is similar to a vertical axis turbine, the direction of turbine axis is not firmly fixed and its tilt angle is passively adjustable to the stream velocity. Since it does not have to keep the turbine axis in upright position, required structural strength and weight of the device will be reduced significantly. This paper describes the application ranging from the small hydro power in river streams to large application of tidal and ocean current turbine. In the large capacity plant for tidal stream and ocean current, the main mechanism of turbine axis support is the same as that of the wind turbine authors proposed in the previous paper. It leads to the further opportunity of cost reduction. The sample design of a multi-megawatt ocean current turbine shows the possibility of high economic performance of the concept. The results show that the cost of energy in the concept can be comparable to a land based wind turbine.

Hiromichi Akimoto; Kenji Tanaka; Kiyoshi Uzawa

2013-01-01T23:59:59.000Z

64

Ocean Wave Energy Company OWECO | Open Energy Information  

Open Energy Info (EERE)

Energy Company OWECO Energy Company OWECO Jump to: navigation, search Name Ocean Wave Energy Company (OWECO) Place Bristol, Rhode Island Sector Ocean Product Wave energy device developer. The company has patented the OWEC Ocean Wave Energy Converter®., a device consisting of a submerged array, suspended at depths permitting full reciprocation of buoys and respective driveshafts. Coordinates 42.55678°, -88.050449° 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":42.55678,"lon":-88.050449,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

65

A power analysis and data acquisition system for ocean wave energy device testing  

Science Journals Connector (OSTI)

In the testing of ocean wave energy devices, the demand for a portable and robust data acquisition and electrical loading system has become apparent. This paper investigates the development of a 30 kW inclusive system combining loading capabilities, real-time power analysis, and data acquisition for the testing of deployed ocean wave energy devices. Hardware results for ocean testing are included.

Ean Amon; Ted K.A. Brekken; Annette von Jouanne

2011-01-01T23:59:59.000Z

66

Ocean Waves Measurement and Analysis, Fifth International Symposium WAVES 2005, 3rd-7th, July, 2005. Madrid, Spain Paper number: 197  

E-Print Network (OSTI)

Ocean Waves Measurement and Analysis, Fifth International Symposium WAVES 2005, 3rd-7th, July, 2005. Madrid, Spain Paper number: 197 #12;Ocean Waves Measurement and Analysis, Fifth International Symposium WAVES 2005, 3rd-7th, July, 2005. Madrid, Spain #12;Ocean Waves Measurement and Analysis, Fifth

Grilli, Stéphan T.

67

Improving the assessment of wave energy resources by means of coupled wave-ocean numerical modeling  

Science Journals Connector (OSTI)

Abstract Sea waves energy represents a renewable and sustainable energy resource, that nevertheless needs to be further investigated to make it more cost-effective and economically appealing. A key step in the process of Wave Energy Converters (WEC) deployment is the energy resource assessment at a sea site either measured or obtained through numerical model analysis. In these kind of studies, some approximations are often introduced, especially in the early stages of the process, viz. waves are assumed propagating in deep waters without underneath ocean currents. These aspects are discussed and evaluated in the Adriatic Sea and its northern part (Gulf of Venice) using locally observed and modeled wave data. In particular, to account for a “state of the art” treatment of the Wave–Current Interaction (WCI) we have implemented the Simulating \\{WAves\\} Nearshore (SWAN) model and the Regional Ocean Modeling System (ROMS), fully coupled within the Coupled Ocean Atmosphere Wave Sediment Transport (COAWST) system. COAWST has been applied to a computational grid covering the whole Adriatic Sea and off-line nested to a high-resolution grid in the Gulf of Venice. A 15-year long wave data set collected at the oceanographic tower “Acqua Alta”, located approximately 15 km off the Venice coast, has also been analyzed with the dual purpose of providing a reference to the model estimates and to locally assess the wave energy resource. By using COAWST, we have quantified for the first time to our best knowledge the importance of the WCI effect on wave power estimation. This can vary up to 30% neglecting the current effect. Results also suggest the Gulf of Venice as a suitable testing site for WECs, since it is characterized by periods of calm (optimal for safe installation and maintenance) alternating with severe storms, whose wave energy potentials are comparable to those ordinarily encountered in the energy production sites.

Francesco Barbariol; Alvise Benetazzo; Sandro Carniel; Mauro Sclavo

2013-01-01T23:59:59.000Z

68

On the application of circular–cylindrical waves to ocean wave power absorption  

Science Journals Connector (OSTI)

This study derives mathematical forms for the waves radiated from a heaving, surging and swaying point source on the surface of a three dimensional ocean. The interactions between a monochromatic plane wave and monochromatic circular–cylindrical radiated waves are examined, and solutions to the time averaged power are calculated. These calculations confirm pre-existing theoretical maximum absorption lengths for both a heaving and surging point source. The derivations also lead to the definition of the amplitude, phase and form of the radiated waves required to achieve these maximums. Two experimental case studies match measured radiated wave with circular waves. These matches demonstrate a correlation between the body motions and the dominant form of radiated waves as well as higher frequency waves. The study develops three general guidelines for the design of efficient point absorber wave energy converters (PAWECs). Optimum power absorption occurs when the PAWEC radiates theoretical heave and surge waves of the appropriate amplitude and phase. Theoretical sway type waves should be minimized as these radiate energy and do not interact with the incident wave. Similarly, the radiation of higher harmonic waves should also be minimized for the same reasons.

Matthew Wypych; Lan Le-Ngoc; Keith Alexander; Alister Gardner

2012-01-01T23:59:59.000Z

69

Compressional and shear wave anisotropy in the oceanic lithosphere - the Ngendei seismic refraction experiment  

Science Journals Connector (OSTI)

......Sereno T. J. , Orcutt J. A., 1985. The synthesis of realistic oceanic P n wave trains, J. geophys. Res., 90, 12755-12776. Shearer P. , Orcutt J., 1985. Anisotropy in the oceanic lithosphere - theory and observations from the Ngendei seismic......

P. M. Shearer; J. A. Orcutt

1986-12-01T23:59:59.000Z

70

Numerical and observational estimates of Indian Ocean Kelvin wave intrusion into Lombok Strait  

E-Print Network (OSTI)

Numerical and observational estimates of Indian Ocean Kelvin wave intrusion into Lombok Strait to investigate Indian Ocean Kelvin waves (IOKWs), specifically their propagation and energy intrusion into Lombok Lombok Strait. This suggests that Lombok Strait acts as a significant transition point for Kelvin wave

71

Wave energy technology in China  

Science Journals Connector (OSTI)

...Wave energy technology in China Yage...Energy and Gas Hydrate...wave energy technology, summarizing...of an air turbine rotating at...research, development and construction...variable-pitch air turbine for the Azores...Liu2000Research and development of Daguan...National Ocean Technology Center, Tianjin...

2012-01-01T23:59:59.000Z

72

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

73

SAR Imaging of Ocean Waves in the Presence of Variable Currents  

Science Journals Connector (OSTI)

A review of the hydrodynamic and electromagnetic processes contributing to radar imaging of ocean waves in the presence of variable currents and nonlinear forcing (input from the wind...

Gaspar R. Valenzuela

1989-01-01T23:59:59.000Z

74

Deep Signatures of Southern Tropical Indian Ocean Annual Rossby Waves* GREGORY C. JOHNSON  

E-Print Network (OSTI)

Deep Signatures of Southern Tropical Indian Ocean Annual Rossby Waves* GREGORY C. JOHNSON NOAA Environmental Laboratory Contribution Number 3671. Corresponding author address: Gregory C. Johnson, NOAA

Johnson, Gregory C.

75

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

76

Overturning circulation driven by breaking internal waves in the deep ocean  

E-Print Network (OSTI)

A global estimate of the water-mass transformation by internal wave-driven mixing in the deep ocean is presented. The estimate is based on the energy conversion from tidal and geostrophic motions into internal waves combined ...

Nikurashin, Maxim

77

Experimental Testing and Model Validation for Ocean Wave Energy Harvesting Buoys  

E-Print Network (OSTI)

for large scale grid power applications, but rather for relatively low-power ocean sensor and communicationsExperimental Testing and Model Validation for Ocean Wave Energy Harvesting Buoys Douglas A. Gemme1 Island Department of Ocean Engineering Narragansett, RI 02882, USA Abstract-- Methodology and results

Grilli, Stéphan T.

78

A Spar Buoy for High-Frequency Wave Measurements and Detection of Wave Breaking in the Open Ocean  

Science Journals Connector (OSTI)

Waves and wave breaking play a significant role in the air–sea exchanges of momentum, sea spray aerosols, and trace gases such as CO2, but few direct measurements of wave breaking have been obtained in the open ocean (far from the coast). This ...

Robin W. Pascal; Margaret J. Yelland; Meric A. Srokosz; Bengamin I. Moat; Edward M. Waugh; Daniel H. Comben; Alex G. Cansdale; Mark C. Hartman; David G. H. Coles; Ping Chang Hsueh; Timothy G. Leighton

2011-04-01T23:59:59.000Z

79

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

80

Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current, and In-Stream Hydrokinetic Power  

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

Assessment of Projected Life-Cycle Costs for Wave, Tidal, Ocean Current, and In-Stream Hydrokinetic Power

Note: This page contains sample records for the topic "turbines ocean waves" 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

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

82

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

83

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

84

Study of directional ocean wavefield evolution and rogue wave occurrence using large-scale phase-resolved nonlinear simulations  

E-Print Network (OSTI)

It is challenging to obtain accurate predictions of ocean surface wavefield evolutions due to several complex dynamic processes involved, including nonlinear wave interaction, wave breaking and wind forcing, and also wave ...

Xiao, Wenting, 1982-

2013-01-01T23:59:59.000Z

85

Bispectral Analysis of Energy Transfer within the Two-Dimensional Oceanic Internal Wave Field  

Science Journals Connector (OSTI)

Bispectral analysis of the numerically reproduced spectral responses of the two-dimensional oceanic internal wave field to the incidence of the low-mode semidiurnal internal tide is performed. At latitudes just equatorward of 30°, the low-mode ...

Naoki Furuichi; Toshiyuki Hibiya; Yoshihiro Niwa

2005-11-01T23:59:59.000Z

86

Current-Induced Modulation of the Ocean Wave Spectrum and the Role of Nonlinear Energy Transfer  

Science Journals Connector (OSTI)

Numerical simulations were performed to investigate current-induced modulation of the spectral and statistical properties of ocean waves advected by idealized and realistic current fields. In particular, the role of nonlinear energy transfer ...

Hitoshi Tamura; Takuji Waseda; Yasumasa Miyazawa; Kosei Komatsu

2008-12-01T23:59:59.000Z

87

The Impact of Finite-Amplitude Bottom Topography on Internal Wave Generation in the Southern Ocean  

Science Journals Connector (OSTI)

Direct observations in the Southern Ocean report enhanced internal wave activity and turbulence in a kilometer-thick layer above rough bottom topography collocated with the deep-reaching fronts of the Antarctic Circumpolar Current. Linear theory, ...

Maxim Nikurashin; Raffaele Ferrari; Nicolas Grisouard; Kurt Polzin

2014-11-01T23:59:59.000Z

88

Global energy conversion rate from geostrophic flows into internal lee waves in the deep ocean  

E-Print Network (OSTI)

A global estimate of the energy conversion rate from geostrophic flows into internal lee waves in the ocean is presented. The estimate is based on a linear theory applied to bottom topography at O(1–10) km scales obtained ...

Nikurashin, Maxim

89

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

E-Print Network (OSTI)

A r ) and specific turbine efficiency value (C e , a maximumand individual turbine power and efficiency which maximizes

Capps, Scott B; Zender, Charles S

2010-01-01T23:59:59.000Z

90

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

91

Mapping and Assessment of the United States Ocean Wave Energy...  

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

wave has traveled seven wavelengths, while the wave group as a whole and its associated energy content have advanced only half that distance. ......

92

Detection of microseismic compressional (P) body waves aided by numerical modeling of oceanic noise sources  

E-Print Network (OSTI)

or where ocean waves propagating as swell meet another swell or wind sea. We then emphasize two particularly strong storms to describe how they generate noise sources in their wake. We also use these two by earthquakes), the sources of the microseismic wave field are more widely distributed in space and time

Stutzmann, Eléonore

93

Model-predicted distribution of wind-induced internal wave energy in the world's oceans  

E-Print Network (OSTI)

Model-predicted distribution of wind-induced internal wave energy in the world's oceans Naoki 9 July 2008; published 30 September 2008. [1] The distribution of wind-induced internal wave energy-scaled kinetic energy are all consistent with the available observations in the regions of significant wind

Miami, University of

94

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

95

Measuring ocean waves from space; Proceedings of the Symposium, Johns Hopkins University, Laurel, MD, Apr. 15-17, 1986  

SciTech Connect

Papers are presented on ocean-wave prediction; the quasi-universal form of the spectra of wind-generated gravity waves at different stages of their development; the limitations of the spectral measurements and observations of the group structure of surface waves; the effect of swell on the growth of wind wave; operational wave forecasting; ocean-wave models, and seakeeping using directional wave spectra. Consideration is given to microwave measurements of the ocean-wave directional spectra; SIR research; estimating wave energy spectra from SAR imagery, with the radar ocean-wave spectrometer, and SIR-B; the wave-measurement capabilities of the surface contour radar and the airborne oceanographic lidar; and SIR-B ocean-wave enhancement with fast-Fourier transform techniques. Topics discussed include wave-current interaction; the design and applicability of Spectrasat; the need for a global wave monitoring system; the age and source of ocean swell observed in Hurricane Josephine; and the use of satellite technology for insulin treatment.

Beal, R.C.

1987-03-01T23:59:59.000Z

96

Modelling rogue waves through exact dynamical lump soliton controlled by ocean currents  

E-Print Network (OSTI)

The ocean rogue wave, one of the mysteries of nature, has not yet been understood or modelled satisfactorily, in spite of being in the intense lime-light in recent years and the concept spreadin fast to other disciplines. Rogue waves are extraordinarily high and steep surface waves. However, most of their theoretical models and experimental observations, excluding a few are one-dimensional, admitting limited high intensity and steepness. We propose here a novel two-dimensional integrable nonlinear Schroedinger equation allowing an exact lump-soliton with special asymmetry and directional preference. The soliton can appear on surface waves making a hole just before surging up high, with adjustable height and steepness and disappear again followed by the hole. The dynamics, speed and the duration of the soliton is controlled by ocean currents. These desirable properties make our exact model promising for describing deep sea large rogue waves.

Kundu, Anjan; Naskar, Tapan

2012-01-01T23:59:59.000Z

97

Discrete-element model for the interaction between ocean waves and sea ice  

SciTech Connect

We present a discrete element method (DEM) model to simulate the mechanical behavior of sea ice in response to ocean waves. The wave/ice interaction can potentially lead to the fracture and fragmentation of sea ice depending on the wave amplitude and period. The fracture behavior of sea ice is explicitly modeled by a DEM method, where sea ice is modeled by densely packed spherical particles with finite size. These particles are bonded together at their contact points through mechanical bonds that can sustain both tensile & compressive forces and moments. Fracturing can be naturally represented by the sequential breaking of mechanical bonds. For a given amplitude and period of incident ocean wave, the model provides information for the spatial distribution and time evolution of stress and micro-fractures and the fragment size distribution. We demonstrate that the fraction of broken bonds,, increases with increasing wave amplitude. In contrast, the ice fragment size decreases with increasing amplitude.

Xu, Zhijie; Tartakovsky, Alexandre M.; Pan, Wenxiao

2012-01-05T23:59:59.000Z

98

Extreme responses of a combined spar-type floating wind turbine and floating wave energy converter (STC) system with survival modes  

Science Journals Connector (OSTI)

Abstract Offshore wind is an important source of renewable energy and is steadier and stronger than onshore wind. Offshore areas not only have strong winds but also contain other potential renewable energy sources, such as ocean waves and tidal currents. Therefore, it is interesting to investigate the possibility to utilise these energy potentials simultaneously, particularly the combination of wind and ocean wave energy due to their natural correlation. For this reason, previous researchers have examined the use of a floating wind turbine (FWT) and a wave energy converter (WEC) on a single platform (Aubault et al., 2011; Peiffer et al., 2011; Soulard and Babarit, 2012). In this paper, a combined concept involving a spar-type FWT and an axi-symmetric two-body WEC is considered and denoted as STC. With respect to operational conditions, a previous study (Muliawan et al., 2013) indicates that the STC not only reduces the total capital cost but also increases the total power production compared to the use of segregated FWT and WEC concepts. As with other floating systems, the STC must be designed to ensure serviceability and survivability during its entire service life. One of the design criteria is the ultimate limit state (ULS), which ensures that the entire STC system will have adequate strength to withstand the load effects imposed by extreme environmental actions. Therefore, in the present study, coupled (wave- and wind-induced response mooring) analysis is performed using SIMO/TDHMILL in the time domain to investigate such responses of the STC system as mooring tension, spar-tower interface bending moment, end stop force, and contact force at the Spar-Torus interface under extreme conditions. Environmental conditions that pertain to the northern North Sea metocean data are selected and include operational, survival and 50-year conditions. Finally, the ULS level responses that are capital cost indicators for both FWT alone and for the STC system are estimated and compared.

Made Jaya Muliawan; Madjid Karimirad; Zhen Gao; Torgeir Moan

2013-01-01T23:59:59.000Z

99

Tapping into Wave and Tidal Ocean Power: 15% Water Power by 2030 |  

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

Tapping into Wave and Tidal Ocean Power: 15% Water Power by 2030 Tapping into Wave and Tidal Ocean Power: 15% Water Power by 2030 Tapping into Wave and Tidal Ocean Power: 15% Water Power by 2030 January 27, 2012 - 11:30am Addthis A map generated by Georgia Tech's tidal energy resource database shows mean current speed of tidal streams. The East Coast, as shown above, has strong tides that could be tapped to produce energy. | Photo courtesy of Georgia Institute of Technology A map generated by Georgia Tech's tidal energy resource database shows mean current speed of tidal streams. The East Coast, as shown above, has strong tides that could be tapped to produce energy. | Photo courtesy of Georgia Institute of Technology Hoyt Battey Water Power Market Acceleration and Deployment Team Lead, Wind and Water Power Program

100

Mapping and Assessment of the United States Ocean Wave Energy Resource  

Open Energy Info (EERE)

TECHNICAL REPORT TECHNICAL REPORT Mapping and Assessment of the United States Ocean Wave Energy Resource EPRI Project Manager P. Jacobson 3420 Hillview Avenue Palo Alto, CA 94304-1338 USA PO Box 10412 Palo Alto, CA 94303-0813 USA 800.313.3774 650.855.2121 askepri@epri.com 1024637 www.epri.com Final Report, December 2011 Mapping and Assessment of the United States Ocean Wave Energy Resource DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITIES THIS DOCUMENT WAS PREPARED BY THE ORGANIZATION(S) NAMED BELOW AS AN ACCOUNT OF WORK SPONSORED OR COSPONSORED BY THE ELECTRIC POWER RESEARCH INSTITUTE, INC. (EPRI).

Note: This page contains sample records for the topic "turbines ocean waves" 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

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

102

Generation of internal waves in the deep ocean J. Nycander  

E-Print Network (OSTI)

topography. The geographical distribution of the energy flux from tides to internal waves is determined essential to determine the energy flux from tides to internal waves. [3] The total dissipation of the M2 tide, which accounts for about two thirds of the energy of all tidal components combined, is known

Nycander, Jonas

103

Mapping and Assessment of the United States Ocean Wave Energy...  

Open Energy Info (EERE)

have recovered by 5 cm when DSPR 30, but only by 1-2 cm when DSPR 10. Source: Smith et al. (2007). ... 2-14 Figure 2-9 Wave height reduction for a 90%...

104

Acoustic-gravity waves in ocean and atmosphere generated by an underwater source  

Science Journals Connector (OSTI)

Air-water interface becomes anomalously transparent and the power flux in the wave transmitted into the air increases dramatically when a compact sound source in water approaches the interface within a fraction of wavelength [O.A. Godin Phys. Rev. Lett. 97 164301 (2006)]. The anomalous transparency of the ocean-atmosphere interface has important implications for detection of underwater explosions and monitoring of compliance with the Comprehensive Nuclear Test Ban Treaty. At wave frequencies below 0.1 Hz it becomes necessary to take gravity into account. Then fluid buoyancy and compressibility simultaneously serve as restoring forces and mechanical perturbations in the water and in the air propagate as acoustic-gravity waves (AGW). It was previously shown [I. Fuks and O.A. Godin Proc. OCEANS'11 MTS/IEEE Kona HI Sept. 2011] that in the case of a shallow source in an ocean of an infinite depth a sharp peak in the power flux into air appears at frequencies close to a cutoff frequency of about 4mHz of a surfaceacoustic-gravity wave. In this paper we extend these results to the ocean of a finite depth where the AGWs interact with an elastic bottom.

Iosif Fuks; Oleg A. Godin

2012-01-01T23:59:59.000Z

105

An Open Ocean Trial of Controlled Upwelling Using Wave Pump Technology  

Science Journals Connector (OSTI)

In 1976, John D. Isaacs proposed to use wave energy to invert the density structure of the ocean and pump deep, nutrient-rich water into the sunlit surface layers. The basic principle is simple: a length of tubing attached to a surface buoy at ...

Angelicque White; Karin Björkman; Eric Grabowski; Ricardo Letelier; Steve Poulos; Blake Watkins; David Karl

2010-02-01T23:59:59.000Z

106

Modification of the Physics and Numerics in a Third-Generation Ocean Wave Model  

Science Journals Connector (OSTI)

The ocean wave model WAM was recently upgraded to improve the coupling between the sea state and the air flow and, in particular, enhance the growth of young wind sea over that of old wind sea. Prior to this change, numerous validations of the ...

Leslie C. Bender

1996-06-01T23:59:59.000Z

107

Bubble entrainment by breaking waves and their influence on optical scattering in the upper ocean  

E-Print Network (OSTI)

Bubble entrainment by breaking waves and their influence on optical scattering in the upper ocean's surface inject bubbles and turbulence into the water column. During periods of rough weather the scales and the turbulent transport of bubbles to depth. Depending on their concentrations and size distribution

Stramski, Dariusz

108

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

109

Overview of Ocean Wave and Tidal Energy Lingchuan Mei  

E-Print Network (OSTI)

resources such as solar and wind energy, waves and tides have the advantages of having much higher power stronger energy conversion devices lower in capital cost than for other renewable technologies and creating more job opportunities. For these major benefits the marine energy can provide us with, a great

Lavaei, Javad

110

MHK Technologies/Ocean Wave Power Spar Buoy Engine | Open Energy  

Open Energy Info (EERE)

Spar Buoy Engine Spar Buoy Engine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Wave Power Spar Buoy Engine.jpg Technology Profile Primary Organization Functional Design Engineering Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Submerged Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description A long period spar buoy supports a subsurface flow augmentor The augmentor directs water from the wave s submarine flow field to a free prime mover piston The prime mover is decoupled from the machine s PTO during times in the wave s cycle when there is little power available for conversion Wave energy is stored in the device until the is enough flow magnetude that power take off can efficiently take place Power can be taken off as high pressure water crankshaft torque or directly as DC electricity

111

Mapping and Assessment of the United States Ocean Wave Energy Resource |  

Open Energy Info (EERE)

450 450 Varnish cache server Mapping and Assessment of the United States Ocean Wave Energy Resource Dataset Summary Description This project estimates the naturally available and technically recoverable U.S. wave energy resources, using a 51-month Wavewatch III hindcast database developed especially for this study by National Oceanographic and Atmospheric Administration's (NOAA's) National Centers for Environmental Prediction. For total resource estimation, wave power density in terms of kilowatts per meter is aggregated across a unit diameter circle. This approach is fully consistent with accepted global practice and includes the resource made available by the lateral transfer of wave energy along wave crests, which enables densities within a few kilometers of a linear array, even for fixed terminator devices.

112

Energy Transport by Nonlinear Internal Waves College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon  

E-Print Network (OSTI)

Energy Transport by Nonlinear Internal Waves J. N. MOUM College of Oceanic and Atmospheric Sciences in the bottom bound- ary layer. In the nonlinear internal waves that were observed, the kinetic energy. The energy transported by these waves includes a nonlinear advection term uE that is negligible in linear

Kurapov, Alexander

113

100-Year Return Value Estimates for Ocean Wind Speed and Significant Wave Height from the ERA-40 Data  

E-Print Network (OSTI)

and time variability of significant wave height and wind speed on the prediction of their extreme values of this dataset makes it ideal for the study of extreme wind and wave phenomena over the whole globe. Initial100-Year Return Value Estimates for Ocean Wind Speed and Significant Wave Height from the ERA-40

Haak, Hein

114

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

115

MHK Technologies/Ocean Wave Energy Converter OWEC | Open Energy Information  

Open Energy Info (EERE)

Converter OWEC Converter OWEC < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Wave Energy Converter OWEC.jpg Technology Profile Primary Organization Ocean Wave Energy Company Technology Resource Click here Wave Technology Type Click here Point Absorber - Submerged Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Neutrally suspended and positively buoyant modules are quick connected into open frame networks Submerged portions are stabilized by variable ballast buoyancy chambers and optional damper sheets situated at a relatively calm depth Frame members carry shaft components of linear rotary converters associated with large point absorber buoys Both directions of reciprocal wave motion i e vertical and horizontal motion directly drive components of counter rotating electrical generators Compared to standard generators wherein one is associated with upstroke and another of smaller proportion with downstroke this configuration increases relative speed with fewer parts Electromechanical loads are real time adjustable with respect to wave sensor web resulting in optimal energy conversion from near fully submerged wave following buoys Electrical conductors are series connected and further quick connected with those of other modules via upper frame members Through implementation of rep

116

Direct Simulations of Wind-Driven Breaking Ocean Waves with Data Assimilation  

E-Print Network (OSTI)

A formulation is developed to assimilate ocean-wave data into the Numerical Flow Analysis (NFA) code. NFA is a Cartesian-based implicit Large-Eddy Simulation (LES) code with Volume of Fluid (VOF) interface capturing. The sequential assimilation of data into NFA permits detailed analysis of ocean-wave physics with higher bandwidths than is possible using either other formulations, such as High-Order Spectral (HOS) methods, or field measurements. A framework is provided for assimilating the wavy and vortical portions of the flow. Nudging is used to assimilate wave data at low wavenumbers, and the wave data at high wavenumbers form naturally through nonlinear interactions, wave breaking, and wind forcing. Similarly, the vertical profiles of the mean vortical flow in the wind and the wind drift are nudged, and the turbulent fluctuations are allowed to form naturally. As a demonstration, the results of a HOS of a JONSWAP wave spectrum are assimilated to study short-crested seas in equilibrium with the wind. Log pr...

Dommermuth, Douglas G; Tran, Vu H; Valenciano, Miguel A

2014-01-01T23:59:59.000Z

117

MHK Technologies/OceanStar | Open Energy Information  

Open Energy Info (EERE)

OceanStar OceanStar < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage OceanStar.jpg Technology Profile Primary Organization Bourne Energy Technology Resource Click here Wave Technology Type Click here Overtopping Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The OceanStar device captures the underlying pressure wave through a series of small turbine generators The OceanStar relies upon a proprietary energy efficient process to smooth out the pulse characteristics common to wave energy in order to be electrical grid friendly The OceanStars high level of scalability is essential to reach the large surface areas required to reach utility scale ocean power generation Technology Dimensions

118

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

E-Print Network (OSTI)

C. S. Zender (2009), Global ocean wind power sensitivity toAND ZENDER: GLOBAL OCEAN WIND POWER POTENTIAL Serpetzoglou,Estimated global ocean wind power potential from QuikSCAT

Capps, Scott B; Zender, Charles S

2010-01-01T23:59:59.000Z

119

MHK Projects/Greenwave Rhode Island Ocean Wave Energy Project | Open Energy  

Open Energy Info (EERE)

Greenwave Rhode Island Ocean Wave Energy Project Greenwave Rhode Island Ocean Wave Energy Project < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":41.4501,"lon":-71.4495,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

120

Practical limits to the power that can be captured from ocean waves by oscillating bodies  

Science Journals Connector (OSTI)

Abstract The maximum average power that can be captured from ocean waves by an idealised and unconstrained oscillating body depends on two hydrodynamic properties: the wave radiation pattern and the radiation resistance (also called added damping or wave damping coefficient). These properties depend on the body geometry and the mode of oscillation. For such unconstrained motion the limits of absorbed power are well described. Power bounds due to physical restrictions like limited volume stroke or machinery stroke length has also received some attention, but has not been sufficiently explored. This paper looks at such physical bounds to the achievable absorbed power. It is done by physical reasoning leading to analytical expressions for the upper bounds, treating heave, surge and pitch motions separately. It is shown how size, oscillation mode and volume stroke of the oscillating body inherently influence the absorption ability. Furthermore, implications for the practical and economical design of wave energy are identified and discussed.

Jørgen Hals Todalshaug

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

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

122

Roles of Equatorial Waves and Western Boundary Reflection in the Seasonal Circulation of the Equatorial Indian Ocean  

E-Print Network (OSTI)

Roles of Equatorial Waves and Western Boundary Reflection in the Seasonal Circulation of Colorado, Boulder, Colorado (Manuscript received 17 May 2005, in final form 26 October 2005) ABSTRACT An ocean general circulation model (OGCM) is used to study the roles of equatorial waves and western

Han, Weiqing

123

Barotropic Rossby Waves Radiating from Tropical Instability Waves in the Pacific Ocean  

Science Journals Connector (OSTI)

Tropical instability waves are triggered by instabilities of the equatorial current systems, and their sea level signal, with peak amplitude near 5°N, is one of the most prominent features of the dynamic topography of the tropics. Cross-spectral ...

J. Thomas Farrar

2011-06-01T23:59:59.000Z

124

554 IEEE JOURNAL OF OCEANIC ENGINEERING, VOL. 37, NO. 3, JULY 2012 Generator Systems for Marine Current Turbine  

E-Print Network (OSTI)

turbine. DFIG Doubly-fed induction generator. PMSG Permanent magnet synchronous generator. MPPT Maximum from a DFIG- and PMSG-based MCT. To high- light differences between the considered technologies, a vari

Paris-Sud XI, Université de

125

Analysis of ocean waves and wave forces by a filtering technique  

E-Print Network (OSTI)

l i b r a r y A &M COLLEGE OF TEXAS AH ALTS 2S CP XIAN WAVES AND WAVE FORCES BY A FILTERING TECHNIQUE A Dis0?rt*tlon li b r a a y j a t r t 6ooipy?? tj ?p j???? t?? ?p????? ?t?ii ??tairt? p? ?prra???? ??t? p? ??oti?r??? ?t? ???? LIBRARY... fulfillment of the requires*nta far the degree of ?????? ?? ?????????? May 1955 ?6??? ???????? ??????6? ????????????? ???6????6??? A&MCO LLEG a ?? ?? l F ?? 6?????????????? ??? tb??pi ?it???b??? t???p??????j ??? b?j???aj? ???o p? ?ip??jjpij ?? ?? ??a...

Blumberg, Randolph

2013-10-04T23:59:59.000Z

126

Development of two-variable maximum power point tracking control for ocean wave energy converters utilizing a power analysis and data acquisition system.  

E-Print Network (OSTI)

??Ocean wave energy shows great potential as a developing form of renewable energy. However, challenges arise in maturing this technology to achieve cost-effective energy conversion.… (more)

Amon, Ean A.

2010-01-01T23:59:59.000Z

127

1 | September 2013 | des courantsWave energyTidal turbines  

E-Print Network (OSTI)

performance and the ability to maintain this performance through the lifetime of the power plant, at a high Symposium Honolulu ­ Hawaï sept 2013 Floating offshore wind Ocean thermal energy conversion DCNS - Ocean of the adopted technical solutions using both numerical simulations and representative trials. From their adpoted

128

Characterization of U.S. Wave Energy Converter (WEC) Test Sites: A Catalogue of Met-Ocean Data.  

SciTech Connect

This report presents met - ocean data and wave energy characteristics at three U.S. wave energy converter (WEC) test and potential deployment sites . Its purpose is to enable the compari son of wave resource characteristics among sites as well as the select io n of test sites that are most suitable for a developer's device and that best meet their testing needs and objectives . It also provides essential inputs for the design of WEC test devices and planning WEC tests, including the planning of deployment and op eration s and maintenance. For each site, this report catalogues wave statistics recommended in the (draft) International Electrotechnical Commission Technical Specification (IEC 62600 - 101 TS) on Wave Energy Characterization, as well as the frequency of oc currence of weather windows and extreme sea states, and statistics on wind and ocean currents. It also provides useful information on test site infrastructure and services .

Dallman, Ann Renee; Neary, Vincent Sinclair

2014-10-01T23:59:59.000Z

129

8.01 - Generating Electrical Power from Ocean Resources  

Science Journals Connector (OSTI)

Abstract Ocean energy resources derived from wind, waves, tidal or marine currents can be utilized and converted to large scale sustainable electrical power. Conversion technologies are easily adaptable and can be integrated within the current utility infrastructure. However, ocean energy has many forms - tides, surface waves, ocean circulation, salinity, and thermal gradients. The focus of this chapter is dedicated to two of these, namely waves and tidal energy. The first are the result of wind-driven waves derived ultimately from solar energy and the latter represents those found in tidal or marine currents, driven by gravitational effects. This chapter also gives an analysis of the current state of art of generating electricity from wave and tidal currents (termed ocean energy). Section 8.01.1 provides an overview of ocean wave and marine current energy conversion with more emphasis on the latter; Sections 8.01.2, 8.01.3, 8.01.4, and 8.01.5 address respectively the history of wave energy, wave resource assessment, wave device development, and air turbines; and Section 8.01.6 gives a review of the economics of ocean energy as applied to wave and tidal energy conversion technologies.

A.S. Bahaj

2012-01-01T23:59:59.000Z

130

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

E-Print Network (OSTI)

Evaluation of global wind power, J. Geophys. Res. , 110,2009), Global ocean wind power sensitivity to surface layerCO 2 reductions via offshore wind power matched to inherent

Capps, Scott B; Zender, Charles S

2010-01-01T23:59:59.000Z

131

Modelling rogue waves through exact dynamical lump soliton controlled by ocean currents  

Science Journals Connector (OSTI)

...dynamical lump soliton controlled by ocean currents Anjan Kundu Abhik Mukherjee Tapan...soliton under the influence of an ocean current appears and disappears preceded...include higher order dispersion or ocean currents, which are suspected to have...

2014-01-01T23:59:59.000Z

132

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

133

Poster presented at the OCEANS'11 Conference, September, 2011 Seeking Optimal Geometry of a Heaving Body for Improved Wave Power  

E-Print Network (OSTI)

1 Poster presented at the OCEANS'11 Conference, September, 2011 Seeking Optimal Geometry of a Heaving Body for Improved Wave Power Absorption Efficiency Rachael Hager, Nelson Fernandez and Michelle H power absorption efficiency with various shaped bodies. The goal is to optimize the geometry of a two

134

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

135

MHK Technologies/Denniss Auld Turbine | Open Energy Information  

Open Energy Info (EERE)

Denniss Auld Turbine Denniss Auld Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Denniss Auld Turbine.jpg Technology Profile Primary Organization Oceanlinx Project(s) where this technology is utilized *MHK Projects/GPP Namibia *MHK Projects/Greenwave Rhode Island Ocean Wave Energy Project *MHK Projects/Hawaii *MHK Projects/Oceanlinx Maui *MHK Projects/Port Kembla *MHK Projects/Portland Technology Resource Click here Wave Technology Type Click here Oscillating Water Column Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description The turbine used in an Oscillating Water Column (OWC) is a key element in the devices economic performance. The Oceanlinx turbine uses variable pitch blades, which, with the slower rotational speed and higher torque of the turbine, improves efficiency and reliability and reduces the need for maintenance. The turbine uses a sensor system with a pressure transducer that measures the pressure exerted on the ocean floor by each wave as it approaches or enters the capture chamber. The transducer sends a voltage signal proportional to the pressure that identifies the height, duration and shape of each wave. The signal from the transducer is sent to a Programmable Logic Controller (PLC) that adjusts various parameters, such as the blade angle and turbine speed, in real time. The generator, which is coupled to the Oceanlinx turbine, is designed so that the electrical control will vary the speed and torque characteristic of the generator load in real time to maximize the power transfer. An induction machine will be used for the generator, with coupling to the electricity grid provided by a fully regenerative electronic control system. The grid interconnection point and the control system are located in a weatherproof building external to the air duct. The voltage of the three phase connection at this point is 415 V L-L at 50 Hz. With the appropriate phase and pulse width modulation, power is transferred in either direction with harmonies and power factor variation contained within the electricity authoritys requirements. The system is normally configured to operate at a power factor of 0.95 or better.

136

Shelf edge reflection of atmospherically generated long ocean waves along the central U.S. East Coast  

Science Journals Connector (OSTI)

Abstract This paper describes an investigation of unusual large-amplitude high­frequency sea level events (?40–60 cm) observed during the period 2006–2012 along the central U.S. East Coast. These events occurred 2–3 h after offshore propagating atmospheric pressure disturbances crossed the coastline. The large amplitudes of the oscillations may be explained by Proudman resonance, as the average speed of the atmospheric pressure disturbances, estimated to be between 16 and 25 m/s, was similar to the shallow-water wave speed over the shelf, ?15–20 m/s. The observed lag of 2–3 h of the events can be explained by shoreward-propagating free waves generated as the atmospheric-forced waves crossed the shelf edge. The estimated pathways of the forced and reflected free ocean waves seem to have been coherent and in good agreement with the lag observed at tide gauge stations.

S. Pasquet; I. Vilibi?

2013-01-01T23:59:59.000Z

137

Global ocean wind power sensitivity to surface layer stability  

E-Print Network (OSTI)

for the first time, the global ocean 80 m wind power and tofirst time, wind power at 80 m (typical wind turbine hub height) above the global ocean

Capps, Scott B; Zender, Charles S

2009-01-01T23:59:59.000Z

138

Blockage effects on the hydrodynamic performance of a marine cross-flow turbine  

Science Journals Connector (OSTI)

...the hydrodynamic efficiency of the turbine for blockage ratios...0820.131. Turbine performance, kinetic and hydrodynamic efficiencies were only marginally...Crawford 2010 Overall efficiency of ducted tidal current turbines. In Proc. OCEANS...

2013-01-01T23:59:59.000Z

139

Ocean Energy Resource Basics | Department of Energy  

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

Hydrogen & Fuel Cells Hydropower Ocean Ocean Thermal Energy Conversion Tidal Energy Wave Energy Ocean Resources Solar Wind Homes & Buildings Industry Vehicles & Fuels...

140

MHK Technologies/Ocean Energy Rig | Open Energy Information  

Open Energy Info (EERE)

Rig Rig < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Energy Rig.jpg Technology Profile Primary Organization Free Flow 69 Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The Ocean Energy Rig is a hybrid concept harnessing tidal stream with increased velocity from venturi system wave and wind power The rig also uses solar panels to power computers and warning lights Other unique features include a water ballasting system with automatic self levelling and wave ramps to maximize FreeFlow 69 s new wave power device It is envisaged that the Ocean Energy Rig would be assembled and maintained in dry docks and would be towed out into position before being semi submerged and anchored for operation Power output of the production model would be at least 10MW

Note: This page contains sample records for the topic "turbines ocean waves" 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

On currents, internal and inertial waves in a stratified ocean due to variable winds. Part 1  

Science Journals Connector (OSTI)

The response of a continuously stratified viscous ocean to a variable wind air pressure field has been studied during recent years by means of analytical methods. This requires the assumption of constant eddy ...

Prof. Dr. W. Krauss

1976-01-01T23:59:59.000Z

142

On currents, internal and inertial waves in a stratified ocean due to variable winds. Part 2  

Science Journals Connector (OSTI)

The response of a continuously stratified viscous ocean to a variable wind and air pressure field has been studied during recent years by means of analytical methods. This requires the assumption of consntant ...

Prof. Dr. W. Krauss

1976-01-01T23:59:59.000Z

143

Modeling the Interaction between the Atmospheric and Oceanic Boundary Layers, Including a Surface Wave Layer  

Science Journals Connector (OSTI)

The interaction between the atmospheric and oceanic boundary layers is simulated by solving a closed system of equations including equations of motion, turbulent kinetic energy (TKE), turbulent exchange coefficient (TEC), expressions for air and ...

Le Ngoc Ly

1986-08-01T23:59:59.000Z

144

Ocean Observing Ocean Observing Systems (OOS)  

E-Print Network (OSTI)

, national, and global scales. · Ocean Observing Systems serve: Fishing industry National security Coastal properties, such as salinity, temperature, and waves Satellite maps of sea surface temperature NATIONAL Integrated Ocean Observing System (IOOS) 11 REGIONAL Systems, including: MANY LOCAL Systems

Schladow, S. Geoffrey

145

Novel control of a permanent magnet linear generator for ocean wave energy applications.  

E-Print Network (OSTI)

??Wave energy conversion devices are a rapidly growing interest worldwide for the potential to harness a sustainable and renewable energy source. Due to the oscillatory… (more)

VanderMeulen, Aaron H.

2007-01-01T23:59:59.000Z

146

Observed Variability of Ocean Wave Stokes Drift, and the Eulerian Response to Passing Groups  

E-Print Network (OSTI)

­current interactions are also considered important in generating and maintaining Langmuir circulation (LC), a prominent 2005, in final form 13 September 2005) ABSTRACT Waves and currents interact via exchanges of mass with current theory. 1. Introduction Surface waves are of central importance in general to air­sea interactions

Smith, Jerome A.

147

Waves and the equilibrium range at Ocean Weather Station P J. Thomson,1  

E-Print Network (OSTI)

energy spectra. Observations are consistent with a local balance between wind input and breaking is extended to a wider range of conditions using observations of wave energy spectra and wind speed during a 2 friction velocity u� (and thus wind stress) directly controls wave energy spectra levels at high fre

148

Mapping and Assessment of the United States Ocean Wave Energy Resource  

SciTech Connect

This project estimates the naturally available and technically recoverable U.S. wave energy resources, using a 51-month Wavewatch III hindcast database developed especially for this study by National Oceanographic and Atmospheric Administration�¢����s (NOAA�¢����s) National Centers for Environmental Prediction. For total resource estimation, wave power density in terms of kilowatts per meter is aggregated across a unit diameter circle. This approach is fully consistent with accepted global practice and includes the resource made available by the lateral transfer of wave energy along wave crests, which enables wave diffraction to substantially reestablish wave power densities within a few kilometers of a linear array, even for fixed terminator devices. The total available wave energy resource along the U.S. continental shelf edge, based on accumulating unit circle wave power densities, is estimated to be 2,640 TWh/yr, broken down as follows: 590 TWh/yr for the West Coast, 240 TWh/yr for the East Coast, 80 TWh/yr for the Gulf of Mexico, 1570 TWh/yr for Alaska, 130 TWh/yr for Hawaii, and 30 TWh/yr for Puerto Rico. The total recoverable wave energy resource, as constrained by an array capacity packing density of 15 megawatts per kilometer of coastline, with a 100-fold operating range between threshold and maximum operating conditions in terms of input wave power density available to such arrays, yields a total recoverable resource along the U.S. continental shelf edge of 1,170 TWh/yr, broken down as follows: 250 TWh/yr for the West Coast, 160 TWh/yr for the East Coast, 60 TWh/yr for the Gulf of Mexico, 620 TWh/yr for Alaska, 80 TWh/yr for Hawaii, and 20 TWh/yr for Puerto Rico.

Paul T. Jacobson; George Hagerman; George Scott

2011-12-01T23:59:59.000Z

149

Challenges in Ocean Energy Utilization  

Science Journals Connector (OSTI)

Ocean is a reservoir of energy. It is ... . Development of suitable cost effective technologies for power generation from different forms of ocean energy (like wave energy, tidal energy, Ocean Thermal Energy Conv...

S. Neelamani

2013-01-01T23:59:59.000Z

150

Ocean energy conversion systems annual research report  

SciTech Connect

Alternative power cycle concepts to the closed-cycle Rankine are evaluated and those that show potential for delivering power in a cost-effective and environmentally acceptable fashion are explored. Concepts are classified according to the ocean energy resource: thermal, waves, currents, and salinity gradient. Research projects have been funded and reported in each of these areas. The lift of seawater entrained in a vertical steam flow can provide potential energy for a conventional hydraulic turbine conversion system. Quantification of the process and assessment of potential costs must be completed to support concept evaluation. Exploratory development is being completed in thermoelectricity and 2-phase nozzles for other thermal concepts. Wave energy concepts are being evaluated by analysis and model testing with present emphasis on pneumatic turbines and wave focussing. Likewise, several conversion approaches to ocean current energy are being evaluated. The use of salinity resources requires further research in membranes or the development of membraneless processes. Using the thermal resource in a Claude cycle process as a power converter is promising, and a program of R and D and subsystem development has been initiated to provide confirmation of the preliminary conclusion.

Not Available

1981-03-01T23:59:59.000Z

151

Extreme wave height estimation for ocean engineering applications in the Gulf of Mexico  

E-Print Network (OSTI)

updated estimates of the 100-year extreme wave conditions for the entire Gulf of Mexico using a more comprehensive approach. First, the applicability of standard parametric wind models was examined and appropriate adjustments to the Rankine vortex model...

Jeong, Chan Kwon

2012-07-16T23:59:59.000Z

152

MHK Technologies/Wave Rider | Open Energy Information  

Open Energy Info (EERE)

Rider Rider < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Rider.jpg Technology Profile Primary Organization Seavolt Technologies Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The company s Wave Rider system uses buoys and hydraulic pumps to convert the movement of ocean waves into electricity Electricity is generated via small turbines powered by hydraulic circuits which captures the energy of the wave and converts it into high pressure hydraulic fluid flow spinning the turbines to generate electricity Technology Dimensions Device Testing Date Submitted 19:42.1 << Return to the MHK database homepage

153

An investigation of the effects of wind-induced inclination on floating wind turbine dynamics: heave plate excursion  

Science Journals Connector (OSTI)

Abstract A current trend in offshore wind is the quest for exploitation of ever deeper water sites. At depths between 50 m and 100 m a promising substructure is the column-stabilised semi-submersible floating type. This solution is currently being tested at full scale at the WindFloat and Fukushima Forward demonstrator sites in Portugal and Japan respectively. The semi-sub design class frequently adopts passive motion control devices based on the water entrapment principle, such as heave plates, tanks, and skirts. Whilst effective for small inclinations, these can underperform when the structure is inclined under wind loading. This study examines the alteration of potential hydrodynamics due to wind-induced trim (geometric non-linearity) and its impact on the wind turbine?s wave response with focus on heave plate performance. Firstly it is shown by using the boundary element approach that wind trim affects wave loading in the ocean wave band between 5 s and 15 s, and introduces hydrodynamic coupling typical of non-symmetric hulls. These features are incorporated in frequency-domain dynamic response analysis to demonstrate that said effects bear a significant impact on the turbine?s motion in waves. Accounting of heave plate excursion improves the assessment of the seaworthiness of floating wind turbine concepts, potentially leading to new design constraints.

Raffaello Antonutti; Christophe Peyrard; Lars Johanning; Atilla Incecik; David Ingram

2014-01-01T23:59:59.000Z

154

MHK Technologies/Oceanlinx Mark 3 Wave Energy Converter | Open Energy  

Open Energy Info (EERE)

Oceanlinx Mark 3 Wave Energy Converter Oceanlinx Mark 3 Wave Energy Converter < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Oceanlinx Mark 3 Wave Energy Converter.jpg Technology Profile Primary Organization Oceanlinx Project(s) where this technology is utilized *MHK Projects/GPP Namibia *MHK Projects/Greenwave Rhode Island Ocean Wave Energy Project *MHK Projects/Hawaii *MHK Projects/Oceanlinx Maui *MHK Projects/Port Kembla *MHK Projects/Portland Technology Resource Click here Wave Technology Type Click here Oscillating Water Column Technology Readiness Level Click here TRL 5/6: System Integration and Technology Laboratory Demonstration Technology Description The Oceanlinx Mark 3 Wave Energy Converter is a floating multi Oscilating Water Chamber Wave Energy Converter. The airflow generated by the OWC passes through a patented Denniss Auld turbine which converts the bidirectional airflow of the OWC to a unidirectional rotation of the axial flow turbine which in turn drives a generator.

155

Gas Turbines  

Science Journals Connector (OSTI)

When the gas turbine generator was introduced to the power generation ... fossil-fueled power plant. Twenty years later, gas turbines were established as an important means of ... on utility systems. By the early...

Jeffrey M. Smith

1996-01-01T23:59:59.000Z

156

Chapter 16 - Ocean Engines  

Science Journals Connector (OSTI)

Publisher Summary Ocean thermal energy converters (OTECs) took advantage of the ocean acting as an immense collector and storer of solar radiation, thus delivering a steady flow of low-grade thermal energy. The ocean plays a similar role in relation to the wind energy, which is transformed into waves far steadier than the air currents that created them. Nevertheless, waves are neither steady nor concentrated enough to constitute a highly attractive energy source notwithstanding their large total power. There is little net horizontal motion of water in a surface ocean wave. A floating object drifts in the direction of the wave with about 1% of the wave velocity. A given elementary cell of water will move in a vertical circle, surging forward near the crest of the wave but receding by an almost equal amount at the trough. Any system in which the wave velocity depends on wavelength is called dispersive; hence the deep ocean is dispersive.

Aldo Vieira da Rosa

2009-01-01T23:59:59.000Z

157

The Earth's hum: the excitation of Earth normal modes by ocean waves  

Science Journals Connector (OSTI)

......air to the density of water. I will assume (at...suggest the forcing of atmospheric microbaroms (the equivalent...waves follow the deep water dispersion curve. At...turbulence an inefficient generator of sound at low Mach...suggests low Mach number atmospheric turbulence on the Earth......

Spahr C. Webb

2008-08-01T23:59:59.000Z

158

Internal?wave effects on 1000?km oceanic acoustic pulse propagation: Simulation and comparison with experiment  

Science Journals Connector (OSTI)

A recent 1000?km acoustic pulse transmission experiment in the Pacific revealed unexpected fluctuations on received wavefronts including a dominant rapid variation called the broadband fluctuation with time scales less than 10 minutes and spatial scales of less than 60 m; a distinct breakdown of the geometrical optics wavefront pattern and broadening of the wavefront near the transmission finalé; and a coherent wavefront motion with a timescale near the semi?diurnal tidal period. Parabolic?equation numerical simulations have been carried out which utilize environmental data and which take into account internal?wave?induced sound?speed perturbations obeying the Garrett–Munk (GM) spectral model. It is shown that the effects of internal waves can account for the broadband fluctuations the breakdown of the geometrical opticspattern and the wavefront broadening. The sensitivity of these fluctuations to internal?wave energy and modal content is examined. The spectral energy in the GM model at tidal periods proves insufficient to explain the tidal period coherent fluctuations strongly suggesting the influence of an internal tide during the experiment. The simulations allow the estimation of the average travel?time bias caused by internal waves. The simulation results for travel?time wander and bias are compared with analytic calculations based on the path?integral technique.

John A. Colosi; Stanley M. Flatté; Charles Bracher

1994-01-01T23:59:59.000Z

159

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

E-Print Network (OSTI)

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

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

2014-01-01T23:59:59.000Z

160

The oceanic excitation hypothesis for the continuous oscillations of the Earth  

E-Print Network (OSTI)

15. Top: Integrated ocean-wave power (square of wave height)Bottom: The integrated ocean-wave power for the whole region

Tanimoto, T

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

MHK Technologies/Wave Treader fixed | Open Energy Information  

Open Energy Info (EERE)

MHK Technologies/Wave Treader fixed MHK Technologies/Wave Treader fixed < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Treader fixed.jpg Technology Profile Primary Organization Green Ocean Energy Ltd Project(s) where this technology is utilized *MHK Projects/Development of Ocean Treader Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description The Wave Treader concept utilises the arms and sponsons from Ocean Treader and instead of reacting against a floating Spar Buoy, will react through an Interface Structure onto the Foundation of an Offshore Wind Turbine. Between the Arms and the Interface Structure hydraulic cylinders are mounted and as the wave passes the machine first the forward Sponson will lift and fall and then the aft Sponson will lift and fall each stroking their hydraulic cylinder in turn. This pressurises hydraulic fluid which is then smoothed by hydraulic accumulators before driving a hydraulic motor which in turn drives an electricity generator. The electricity is then exported through the cable shared with the Wind Turbine.

162

Volume Scattering of Acoustic Waves in the N. E. Pacific Ocean  

Science Journals Connector (OSTI)

Two types of scattering strength measurements have been obtained in the N. E. Pacific Ocean in deep water approximately 100 NM west of the entrance to the Strait of Juan de Fuca. The first type is obtained using surface venting explosive charges with the listening hydrophone suspended near the surface (i.e. depth <50 ft) to measure the backscattered acoustic energy. Levels of the intensity time curves so observed yield the scattering strength integrated to the depth corresponding to the time coordinate on the decay curve i.e. ? z?d z? O m r ?(z)?dz while the decay rates yield information on the scattering distribution in the medium. The second type of scattering measurement obtained is the scattering strength profile. Such profiles are obtained using near monostatic fired charge and receiver placed at various depths. Observation of the close?in scattered returns permits adequate resolution to plot scattering profiles through most layers [i.e. mv (z) z=0+d ]. Both sets of measurements show the diurnal migration of the scattering layers as well as the frequency characteristics. However the technique of measuring the scattering strength profile is the more direct and yields a better picture of layer distributions and the depth dependence of the scattering spectra.

J. A. Scrimger; R. G. Turner

1969-01-01T23:59:59.000Z

163

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

E-Print Network (OSTI)

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

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

2013-01-01T23:59:59.000Z

164

On the use of computational models for wave climate assessment in support of the wave energy industry.  

E-Print Network (OSTI)

??Effective, economic extraction of ocean wave energy requires an intimate under- standing of the ocean wave environment. Unfortunately, wave data is typically un- available in… (more)

Hiles, Clayton E.

2011-01-01T23:59:59.000Z

165

Steam Turbines  

Science Journals Connector (OSTI)

... chapters take up the design of nozzles and blades, and descriptions of commercial types of turbines. The treatment of low-pressure, mixed pressure, bleeder, and marine ... . The treatment of low-pressure, mixed pressure, bleeder, and marine turbines occupies separate chapters. Of these, the section dealing with the marine ...

1917-09-20T23:59:59.000Z

166

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

167

Kelvin Waves around Antarctica  

Science Journals Connector (OSTI)

The Southern Ocean allows circumpolar structure and the Antarctic coastline plays a role as a waveguide for oceanic Kelvin waves. Under the cyclic conditions, the horizontal wavenumbers and frequencies for circumpolarly propagating waves are ...

Kazuya Kusahara; Kay I. Ohshima

2014-11-01T23:59:59.000Z

168

Ocean Energy Technology Basics | Department of Energy  

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

Ocean Energy Technology Basics Ocean Energy Technology Basics Ocean Energy Technology Basics August 16, 2013 - 4:18pm Addthis Text Version Photo of low waves in the ocean. A dock is visible in the background. Oceans cover more than 70% of the Earth's surface. As the world's largest solar collectors, oceans contain thermal energy from the sun and produce mechanical energy from tides and waves. Even though the sun affects all ocean activity, the gravitational pull of the moon primarily drives tides, and wind powers ocean waves. Learn more about: Ocean Thermal Energy Conversion Tidal Energy Wave Energy Ocean Resources Addthis Related Articles Energy Department Releases New Energy 101 Video on Ocean Power A map generated by Georgia Tech's tidal energy resource database shows mean current speed of tidal streams. The East Coast, as shown above, has strong tides that could be tapped to produce energy. | Photo courtesy of Georgia Institute of Technology

169

Chapter 9 - Hydraulic Turbines  

Science Journals Connector (OSTI)

This chapter covers the following topics: Features of hydraulic turbines; Early history and development; Efficiency of various types of turbine; Size of the various turbine types; The Pelton wheel turbine and controlling its speed; Energy losses; Reaction turbines; The Francis and the Kaplan turbines; Calculation of performance; Effect of size on the performance of hydraulic turbines; Cavitation and its avoidance; Calculation of the various specific speeds of turbines; The Wells turbine- Design and performance variables; Tidal power turbines- The SeaGen tidal turbine and its operational principles.

S.L. Dixon; C.A. Hall

2014-01-01T23:59:59.000Z

170

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

171

MHK Technologies/Zero Impact Water Current Turbine | Open Energy  

Open Energy Info (EERE)

Zero Impact Water Current Turbine Zero Impact Water Current Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization Green Wave Energy Corp GWEC Project(s) where this technology is utilized *MHK Projects/Green Wave Mendocino *MHK Projects/Green Wave San Luis Obispo Technology Resource Click here Current/Tidal Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description The Green Wave Zero Impact Water Current Turbine is a water current turbine that will revolutionize power generation as we know it Technology Dimensions Device Testing Date Submitted 10/8/2010 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/Zero_Impact_Water_Current_Turbine&oldid=681718

172

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

173

Liu et aL.September 2012 373 Simulation of ocean ReSponSeS to an idealized  

E-Print Network (OSTI)

, inundation, significant wave heights and ocean currents in shallow coastal areas as a result of wave, significant wave height and ocean currents. Only in a TC-wave- ocean three-way coupled system, air, inundation, currents and significant wave height. Keywords: coupled atmosphere-wave-ocean modeling system

Liu, Paul

174

JOURNAL OF WATERWAY, PORT, COASTAL, AND OCEAN ENGINEERING / JANUARY/FEBRUARY 2000 / 39 BOUSSINESQ MODELING OF WAVE TRANSFORMATION,  

E-Print Network (OSTI)

JOURNAL OF WATERWAY, PORT, COASTAL, AND OCEAN ENGINEERING / JANUARY/FEBRUARY 2000 / 39 BOUSSINESQ and testing of two sets of Boussinesq-type equations to include surf zone phenomena. Part I is restricted to 1. The model uses two main extensions to the Boussinesq equations: a momentum-conserving eddy viscosity

Kirby, James T.

175

48 / JOURNAL OF WATERWAY, PORT, COASTAL, AND OCEAN ENGINEERING / JANUARY/FEBRUARY 2000 BOUSSINESQ MODELING OF WAVE TRANSFORMATION,  

E-Print Network (OSTI)

48 / JOURNAL OF WATERWAY, PORT, COASTAL, AND OCEAN ENGINEERING / JANUARY/FEBRUARY 2000 BOUSSINESQ and verification of an extended Boussinesq model for surf zone hydrodynamics in two horizontal dimensions. The time-domain numerical model is based on the fully nonlinear Boussinesq equations. As described in Part I of this two

Kirby, James T.

176

MHK Technologies/The Davis Hydro Turbine | Open Energy Information  

Open Energy Info (EERE)

Hydro Turbine Hydro Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage The Davis Hydro Turbine.jpg Technology Profile Primary Organization Blue Energy Technology Resource Click here Current Technology Type Click here Cross Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The Blue Energy Ocean Turbine acts as a highly efficient underwater vertical axis windmill Four fixed hydrofoil blades of the turbine are connected to a rotor that drives an integrated gearbox and electrical generator assembly The turbine is mounted in a durable concrete marine caisson that anchors the unit to the ocean floor and the structure directs flow through the turbine further concentrating the resource supporting the coupler gearbox and generator above the rotor These sit above the surface of the water and are readily accessible for maintenance and repair The hydrofoil blades employ a hydrodynamic lift principal that causes the turbine foils to move proportionately faster than the speed of the surrounding water Computer optimized cross flow design ensures that the rotation of the turbine is unidirectional on both the ebb and flow of the tide

177

Experimental Wave Tank Test for Reference Model 3 Floating-Point Absorber Wave Energy Converter Project  

SciTech Connect

The U.S. Department of Energy established a reference model project to benchmark a set of marine and hydrokinetic technologies including current (tidal, open-ocean, and river) turbines and wave energy converters. The objectives of the project were to first evaluate the status of these technologies and their readiness for commercial applications. Second, to evaluate the potential cost of energy and identify cost-reduction pathways and areas where additional research could be best applied to accelerate technology development to market readiness.

Yu, Y. H.; Lawson, M.; Li, Y.; Previsic, M.; Epler, J.; Lou, J.

2015-01-01T23:59:59.000Z

178

MHK Technologies/WavePlane | Open Energy Information  

Open Energy Info (EERE)

WavePlane WavePlane < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage WavePlane.jpg Technology Profile Primary Organization WavePlane A S Project(s) where this technology is utilized *MHK Projects/WavePlane Prototype 1 Technology Resource Click here Wave Technology Type Click here Overtopping Device Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The WavePlane is a V-shaped design, which is anchored with the head up against the incoming waves. Below the waterline the device is fitted with an artificial beach, which is designed to improve the capture of wave energy. The WavePlane is symmetrical in its construction. Each side captures the water from the waves of various heights. The device splits the oncoming waves with a series of intakes, known as lamellas, which guide the captured water into a 'flywheel tube.' The fast moving vortex that is formed then forces the water across two turbines, which are located at the ends of the two 'V-shaped legs'. Finally the water is discharged back into the ocean.

179

www.hboi.fau.edu Ocean Energy  

E-Print Network (OSTI)

to drive turbines #12;At present, the focus is to establish a small-scale ocean current test sitewww.hboi.fau.edu Ocean Energy Collaboration: A Charge for Engineers BULLETIN Summer 2012 Beginning by Executive Director Sue Skemp, they are helping to investigate and develop power extraction from particularly

Fernandez, Eduardo

180

Measuring surface ocean wave height and directional spectra using an Acoustic Doppler Current Profiler from an autonomous underwater vehicle  

E-Print Network (OSTI)

The Acoustic Doppler Current Profiler (ADCP) is a proven technology which is capable of measuring surface wave height and directional information, however it is generally limited to rigid, bottom mounted applications which ...

Haven, Scott

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

Waves  

E-Print Network (OSTI)

Waves is the supporting document to the Master of Fine Arts thesis exhibition of the same title. Exhibited March 7-12 2010 in the Art and Design Gallery at the University of Kansas, Waves was comprised of a series of mixed media drawings...

LaCure, Mari Mae

2010-04-29T23:59:59.000Z

182

Steam Turbine Cogeneration  

E-Print Network (OSTI)

Steam turbines are widely used in most industrial facilities because steam is readily available and steam turbine is easy to operate and maintain. If designed properly, a steam turbine co-generation (producing heat and power simultaneously) system...

Quach, K.; Robb, A. G.

2008-01-01T23:59:59.000Z

183

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

184

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

185

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

186

Wave Height Characteristics in the North Atlantic Ocean: A new approach based on Statistical and Geometrical techniques  

E-Print Network (OSTI)

on satellite records and corresponding simulations obtained from the numerical WAve prediction Model (WAM). The two data sets are analyzed by means of a variety of statistical measures mainly focusing Weibull distribution fits the data in the study with parameters that vary spatially. This variation should

Dodson, C.T.J.

187

MHK Technologies/SeaUrchin Vortex Reaction Turbine | Open Energy  

Open Energy Info (EERE)

SeaUrchin Vortex Reaction Turbine SeaUrchin Vortex Reaction Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage SeaUrchin Vortex Reaction Turbine.jpg Technology Profile Primary Organization Elemental Energy Technologies Limited ABN 46 128 491 903 Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description A revolutionary vortex reaction turbine branded the SeaUrchin an advanced third generation marine turbine technology capable of delivering inexpensive small to large scale baseload or predictable electricity by harnessing the kinetic energy of free flowing ocean currents tides and rivers Technology Dimensions Device Testing Date Submitted 55:15.2

188

Ocean Energy Projects Developing On and Off America's Shores | Department  

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

Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores January 22, 2013 - 1:14pm Addthis Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean Power Technologies. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean

189

Ocean Energy Projects Developing On and Off America's Shores | Department  

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

Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores Ocean Energy Projects Developing On and Off America's Shores January 22, 2013 - 1:14pm Addthis Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Artist rendering of Ocean Power Technologies' proposed wave park off the coast of Oregon. | Photo courtesy of Ocean Power Technologies. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Verdant testing its tidal energy device in New York's East River. | Photo courtesy of Verdant Power. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean Power Technologies. Ocean Power Technologies wave energy device. | Photo courtesy of Ocean

190

Ocean Sci., 4, 1529, 2008 www.ocean-sci.net/4/15/2008/  

E-Print Network (OSTI)

is everywhere perpendicular to the local direction of gravity. If there were no waves or currents in the oceanOcean Sci., 4, 15­29, 2008 www.ocean-sci.net/4/15/2008/ © Author(s) 2008. This work is licensed under a Creative Commons License. Ocean Science An Oceanographer's Guide to GOCE and the Geoid C. W

Paris-Sud XI, Université de

191

Ocean Science, 1, 97112, 2005 www.ocean-science.net/os/1/97/  

E-Print Network (OSTI)

oceanic currents by reducing the shears between them (Hansen and Paul, 1984; Weisberg, 1984Ocean Science, 1, 97­112, 2005 www.ocean-science.net/os/1/97/ SRef-ID: 1812-0792/os/2005-1-97 European Geosciences Union Ocean Science Multi-year satellite observations of instability waves

Paris-Sud XI, Université de

192

turbine | OpenEI Community  

Open Energy Info (EERE)

turbine Home Future of Condition Monitoring for Wind Turbines Description: Research into third party software to aid in the development of better CMS in order to raise turbine...

193

Trailing Edge Noise Model Applied to Wind Turbine Airfoils  

E-Print Network (OSTI)

flows, as well as the acoustic waves, using Computational Fluid Dynamics have become affordable thanksTrailing Edge Noise Model Applied to Wind Turbine Airfoils Franck Bertagnolio Risø-R-1633(EN) Risø Bertagnolio Title: Trailing Edge Noise Model Applied to Wind Turbine Airfoils Department: Wind Energy

194

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

195

Foam Cleaning of Steam Turbines  

E-Print Network (OSTI)

The efficiency and power output of a steam turbine can be dramatically reduced when deposits form on the turbine blades. Disassembly and mechanical cleaning of the turbine is very time consuming and costly. Deposits can be removed from the turbine...

Foster, C.; Curtis, G.; Horvath, J. W.

196

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

197

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

198

Gas Turbine Plants  

Science Journals Connector (OSTI)

In a cycle process of a gas turbine, the compressor load, as well as ... from the expansion of the hot pressurized flue gas. Either turbine, compressor and driven assembly are joined by ... shaft is thus divided,...

1992-01-01T23:59:59.000Z

199

Gas-Turbine Cycles  

Science Journals Connector (OSTI)

This book focuses on the design of regenerators for high-performance regenerative gas turbines. The ways in which gas-turbine regenerators can be designed for high system performance can be understood by studying...

Douglas Stephen Beck; David Gordon Wilson

1996-01-01T23:59:59.000Z

200

MHK Technologies/Deep water capable hydrokinetic turbine | Open Energy  

Open Energy Info (EERE)

water capable hydrokinetic turbine water capable hydrokinetic turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage 275px Technology Profile Primary Organization Hills Inc Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description It is an axial flow shrouded turbine direct connected to a water pump that delivers water to an on shore genetator Being completely water proof and submersible the device can operate at any water depth Mooring Configuration An array of turbines are teathered to a cable that is anchored via a dead weight Optimum Marine/Riverline Conditions This system is designed for use in Florida s Gulf Stream however any constant ocean current is suitable

Note: This page contains sample records for the topic "turbines ocean waves" 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

MHK Technologies/Horizontal Axis Logarithmic Spiral Turbine | Open Energy  

Open Energy Info (EERE)

Horizontal Axis Logarithmic Spiral Turbine Horizontal Axis Logarithmic Spiral Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization Golden Turbines LLC Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description A Horizontal axis Water turbine following the logarithmic spiral to generate clean electric energy from slow moving currents like rivers or ocean currents and with least impact on marine life and the environment because it doesn t require a damn or building huge structures Technology Dimensions Device Testing Date Submitted 36:09.5 << Return to the MHK database homepage

202

MHK Technologies/Deep Gen Tidal Turbines | Open Energy Information  

Open Energy Info (EERE)

Deep Gen Tidal Turbines Deep Gen Tidal Turbines < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Deep Gen Tidal Turbines.jpg Technology Profile Primary Organization Tidal Generation Ltd Project(s) where this technology is utilized *MHK Projects/Tidal Generation Ltd EMEC Technology Resource Click here Current/Tidal Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The DEEP Gen 1 MW fully submerged tidal turbine best exploits resources in depths 30m The horizontal axis turbine is inexpensive to construct and easy to install due to the lightweight 80 tons MW support structure allows rapid removal and replacement of powertrains enabling safe maintenance in a dry environment and is located out of the wave zone for improved survivability

203

Sliding vane geometry turbines  

SciTech Connect

Various systems and methods are described for a variable geometry turbine. In one example, a turbine nozzle comprises a central axis and a nozzle vane. The nozzle vane includes a stationary vane and a sliding vane. The sliding vane is positioned to slide in a direction substantially tangent to an inner circumference of the turbine nozzle and in contact with the stationary vane.

Sun, Harold Huimin; Zhang, Jizhong; Hu, Liangjun; Hanna, Dave R

2014-12-30T23:59:59.000Z

204

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"

205

MHK Technologies/Ocean | Open Energy Information  

Open Energy Info (EERE)

Ocean Ocean < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean.jpg Technology Profile Primary Organization Hydro Green Energy LLC Project(s) where this technology is utilized *MHK Projects/Alaska 35 *MHK Projects/Maine 1 Project *MHK Projects/Mississippi 6 *MHK Projects/Mississippi 7 *MHK Projects/New York 1 *MHK Projects/New York 2 Technology Resource Click here Current/Tidal Technology Type Click here Cross Flow Turbine Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description Hydro Green Energy's HydroKinetic Turbine Arrays operate differently than a traditional hydropower plant. Like a traditional hydropower station, the electricity that we produce is clean and renewable, however, there are significant differences. Hydro Green Energy's Krouse Turbines are kinetic turbines. This means that the renewable power that is generated comes from the energy in the "motion" of the moving water, i.e. the velocity of the moving water be it river, tidal or ocean current to generate river, tidal energy or ocean energy, respectively.

206

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

207

NETL: Turbines - Oxy-Fuel Turbines  

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

Oxy-Fuel Turbines Oxy-Fuel Turbines Oxy-fuel combustion potentially can be used in plants based on both conventional and advanced technology. Studies have shown that plants equipped with oxy-fuel systems could reach nominal efficiencies in the 30 percent range with today's steam turbines when fueled with natural gas and when capturing the CO2. With anticipated advances in gasification, oxygen separation, and steam turbine technology, plants using oxy-fuel systems are expected to achieve efficiencies in the mid-40 percent range, with near-100 percent CO2 capture and near-zero NOx emissions. By 2012: In the near-term, efforts are focused on the development of oxy- fuel turbine and combustor technologies for highly efficient (50-60 percent), near-zero emissions, coal-based power systems

208

Theory and Performance of Tesla Turbines  

E-Print Network (OSTI)

can significantly increase turbine efficiency. Exploratorymodel indicate that turbine efficiencies exceeding 75% canand experimental turbine efficiencies. The CFD solutions of

Romanin, Vincent D.

2012-01-01T23:59:59.000Z

209

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

210

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

211

Infrasonic ambient ocean noise: Northeast Pacific Ocean  

Science Journals Connector (OSTI)

Measurements of ocean ambient noise were made at three widely separated deep?water bottom locations in the N. E. Pacific at eight frequencies in the range from 2.5–20.0 Hz for 40 consecutive days. Concurrent data on wind speed and wave height were collected. Analysis indicates that the spectrum level of infrasonicnoise is linearly related to the log of the wind speed above a threshold level. There is evidence that the noise can be directly associated with the wind rather than through the surface waves it produces. [Work supported by ONR.

Rudolph H. Nichols

1985-01-01T23:59:59.000Z

212

MHK Technologies/CETO Wave Energy Technology | Open Energy Information  

Open Energy Info (EERE)

Wave Energy Technology Wave Energy Technology < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage CETO Wave Energy Technology.png Technology Profile Primary Organization Carnegie Wave Energy Limited Project(s) where this technology is utilized *MHK Projects/CETO La Reunion *MHK Projects/CETO3 Garden Island *MHK Projects/Perth Wave Energy Project PWEP Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 7/8: Open Water System Testing & Demonstration & Operation Technology Description The CETO system distinguishes itself from other wave energy devices by operating out of sight and being anchored to the ocean floor. Each CETO unit consists of a pump unit moored to the ocean floor and connected to a submerged Buoyant Actuator via a tether. The Buoyant Actuator moves in an orbital motion, in harmony with the wave, capturing the power of the passing waves. The Buoyant Actuator is connected to a tether (marine rope) that creates a vertical upward force which actuates the seabed mounted piston pump. This force pressurises fluid in the CETO system. The high pressure fluid is then sent ashore via a subsea pipeline. Onshore the fluid passes through a standard hydroelectric turbine to generate zero-emission electricity and/or through a reverse osmosis plant to directly create zero-emission desalinated water (replacing greenhouse gas emitting electrically driven pumps usually required for such plants). The fluid is then re-circulated at low-pressure to the CETO units offshore creating a closed-loop system. The generation capacity of CETO projects is scalable. To increase the project capacity additional units can be added offshore and connected back to a larger power house onshore.

213

Characterizing Ocean Turbulence from Argo, Acoustic Doppler, and Simulation Data  

E-Print Network (OSTI)

. TurbSim models statistics at the height of a turbine hub (5m) well, but do not model coherent eventsCharacterizing Ocean Turbulence from Argo, Acoustic Doppler, and Simulation Data Katherine Mc Ocean Turbulence from Argo, Acoustic Doppler, and Simulation Data written by Katherine McCaffrey has

Fox-Kemper, Baylor

214

OceanEnergyMMS.p65  

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

Minerals Management Service, U.S. Department of the Interior Ocean Energy PAGE 1 Minerals Management Service, U.S. Department of the Interior Ocean Energy PAGE 1 Teacher Guide .......................................................... 2 Related National Science Standards .......................... 3 Introduction to Ocean Energy .................................. 4 Petroleum & Natural Gas ......................................... 5 Natural Oil and Gas Seeps ........................................ 7 Methane Hydrates .................................................... 8 Solar Energy .............................................................. 9 Wind Energy ........................................................... 10 Wave Energy ........................................................... 11 OTEC: Ocean Thermal Energy Conversion .............

215

MHK Technologies/WaveMaster | Open Energy Information  

Open Energy Info (EERE)

WaveMaster WaveMaster < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage WaveMaster.jpg Technology Profile Primary Organization Ocean Wavemaster Ltd Technology Resource Click here Wave Technology Type Click here Point Absorber - Submerged Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The WaveMaster device consists of two pressure chambers connected via a number of turbines The device is located under the waters surface so that it is covered at all times The upper surface of each chamber is an active surface covered with one way valves that control the flow of water through the device The valves on the high pressure chamber allow water to flow into the chamber provided the external pressure is higher than the internal pressure in the chamber This situation typically occurs under wave crests If the external pressure is less than the internal pressure the valves remain closed and water does not flow in Similarly the valves on the low pressure chamber will only allow water to flow out of the chamber if the internal pressure is higher than the external pressure This situation typically occurs under wave troughs If the internal pressure is less than the external pressure the valves remain closed and there is no flow of water

216

On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy Industry  

E-Print Network (OSTI)

On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy Industry Effective, economic extraction of ocean wave energy requires an intimate under- standing of the ocean wave

Victoria, University of

217

Wave Power: Destroyer of Rocks; Creator of Clean Energy  

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

E E PG&E Wave Energy Wave Energy Federal Utility Partnership Federal Utility Partnership Working Group Meeting Working Group Meeting Wave Energy Wave Energy Development Development Ontario, CA Ontario, CA November 18 November 18- -19, 200 19, 2009 9 Donald G. Price Donald G. Price Senior Consulting Scientist, PG&E Senior Consulting Scientist, PG&E Wave Power Overview Wave Power Overview * * What is Wave Power? What is Wave Power? o o Wave power or wave energy is the energy contained in ocean Wave power or wave energy is the energy contained in ocean o o Wave power or wave energy is the energy contained in ocean Wave power or wave energy is the energy contained in ocean waves that is converted into electricity by various means. waves that is converted into electricity by various means. o o It is a clean, renewable energy resource capable of being utilized

218

Improving steam turbine efficiency  

SciTech Connect

This paper describes the condition of a significant number of fossil steam turbines operating in the United States and the maintenance practices used to improve their performance. Through the use of steam path audits conducted by the authors` company and by several utilities, a large data base of information on turbine heat rate, casing efficiency, and maintenance practices is available to help the power generation industry understand how different maintenance practices and steam path damage impact turbine performance. The data base reveals that turbine cycle heat rate is typically 5.23% poorer than design just prior to major outages. The degraded condition of steam turbines presents an opportunity for utilities to improve heat rate and reduce emissions without increasing fuel costs. The paper describes what losses typically contribute to the 5.23% heat rate degradation and how utilities can recover steam turbine performance through maintenance actions aimed at improving steam path efficiency.

Cioffi, D.H.; Mitchell, D.R.; Whitecar, S.C. [Encotech, Inc., Schenectady, NY (United States)

1995-06-01T23:59:59.000Z

219

Arnold Schwarzenegger CALIFORNIA OCEAN WAVE  

E-Print Network (OSTI)

(RD&D) projects to benefit the electricity and natural gas ratepayers in California. The Energy for natural gas RD&D. The PIER program strives to conduct the most promising public interest energy research End-Use Energy Efficiency · Industrial/Agricultural/Water End-Use Energy Efficiency · Renewable Energy

220

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]

Note: This page contains sample records for the topic "turbines ocean waves" 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

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

222

Turbulent Vertical Kinetic Energy in the Ocean Mixed Layer  

Science Journals Connector (OSTI)

Vertical velocities in the ocean boundary layer were measured for two weeks at an open ocean, wintertime site using neutrally buoyant floats. Simultaneous measurements of the surface meteorology and surface waves showed a large variability in ...

Eric A. D'Asaro

2001-12-01T23:59:59.000Z

223

Biomimetic Electrostatics for Submerged Oceanic Sensing, Communication, and Coordination  

E-Print Network (OSTI)

potential) to inject power into the ocean as salinity isocean waters eliminates virtually all of the output power aspower losses expected for an electromagnetic wave propagat- ing in the ocean

Friedman, Jonathan Katzenstein

2012-01-01T23:59:59.000Z

224

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.

225

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...

226

Hermetic turbine generator  

DOE Patents (OSTI)

A Rankine cycle turbine drives an electric generator and a feed pump, all on a single shaft, and all enclosed within a hermetically sealed case. The shaft is vertically oriented with the turbine exhaust directed downward and the shaft is supported on hydrodynamic fluid film bearings using the process fluid as lubricant and coolant. The selection of process fluid, type of turbine, operating speed, system power rating, and cycle state points are uniquely coordinated to achieve high turbine efficiency at the temperature levels imposed by the recovery of waste heat from the more prevalent industrial processes.

Meacher, John S. (Ballston Lake, NY); Ruscitto, David E. (Ballston Spa, NY)

1982-01-01T23:59:59.000Z

227

Economical Condensing Turbines?  

E-Print Network (OSTI)

an engineer decide when to conduct an in depth study of the economics either in the company or outside utilizing professional engineers who are experts in this type of project. Condensing steam turbines may not be economical when the fuel is purchased...Economical Condensing Turbines? by J.E.Dean, P.E. Steam turbines have long been used at utilities and in industry to generate power. There are three basic types of steam turbines: condensing, letdown 1 and extraction/condensing. ? Letdown...

Dean, J. E.

228

MHK Technologies/Uppsala Cross flow Turbine | Open Energy Information  

Open Energy Info (EERE)

flow Turbine flow Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Uppsala Cross flow Turbine.gif Technology Profile Primary Organization Uppsala University Technology Resource Click here Wave Technology Type Click here Cross Flow Turbine Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description A cross flow turbine with fixed blade pitch is directly connected i e no gearbox to a low speed generator The generator is designed to give good efficiency over a wide range of speeds and loads The output voltage and current from the generator will be rectified and then inverted to grid specifications Mooring Configuration Gravity base Optimum Marine/Riverline Conditions Not yet determined Research concerns velocities below and above 1 m s

229

Om Ocean Energy Centre Vrt uppdrag r att frmja havsenergiindustrin i Sverige  

E-Print Network (OSTI)

test med uppankring av "slangen" i havet) Waves4Power Vigor WaveEnergy Ocean Harvester Deep Green simulation · Power from the ocean Ocean Mechanical system Electrical System · Power take-off · ElectricOm Ocean Energy Centre Vårt uppdrag är att främja havsenergiindustrin i Sverige och

Lemurell, Stefan

230

Turbines and turbulence  

Science Journals Connector (OSTI)

... Will wind turbines wreck the environment? Last month, the South China Morning Post published a news story ... dismissive official quoted probably has a point. There is no solid scientific evidence that wind turbines can trigger major changes in rainfall. And given Nature's conversations with atmospheric modellers ...

2010-12-22T23:59:59.000Z

231

Modern Gas Turbines  

Science Journals Connector (OSTI)

... THE published information on gas turbines is both voluminous and widely dispersed, a considerable part of the technical literature of ... hands of students whose imagination has been fired by the rapid development of the gas turbine, and whose knowledge of thermodynamics may not be sufficient to detect such errors. There ...

E. G. STERLAND

1948-06-12T23:59:59.000Z

232

Shipbuilding: Cunard Turbines Examined  

Science Journals Connector (OSTI)

... judge. It will be a great achievement if he can devise an assessment of the turbine troubles to satisfy all three parties. The Minister of Technology, Mr Anthony Wedgwood Benn ... Arnold to examine reports from all three companies on the faults which arose in the turbines during the recent trials of the QE2, and to assess the remedial measures that ...

1969-02-15T23:59:59.000Z

233

Single rotor turbine engine  

DOE Patents (OSTI)

There has been invented a turbine engine with a single rotor which cools the engine, functions as a radial compressor, pushes air through the engine to the ignition point, and acts as an axial turbine for powering the compressor. The invention engine is designed to use a simple scheme of conventional passage shapes to provide both a radial and axial flow pattern through the single rotor, thereby allowing the radial intake air flow to cool the turbine blades and turbine exhaust gases in an axial flow to be used for energy transfer. In an alternative embodiment, an electric generator is incorporated in the engine to specifically adapt the invention for power generation. Magnets are embedded in the exhaust face of the single rotor proximate to a ring of stationary magnetic cores with windings to provide for the generation of electricity. In this alternative embodiment, the turbine is a radial inflow turbine rather than an axial turbine as used in the first embodiment. Radial inflow passages of conventional design are interleaved with radial compressor passages to allow the intake air to cool the turbine blades.

Platts, David A. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

234

Ceramic Cerami Turbine Nozzle  

DOE Patents (OSTI)

A turbine nozzle vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes an outer shroud and an inner shroud having a plurality of horizontally segmented vanes therebetween being positioned by a connecting member positioning segmented vanes in functional relationship one to another. The turbine nozzle vane assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the other component.

Boyd, Gary L. (Alpine, CA)

1997-04-01T23:59:59.000Z

235

Ceramic turbine nozzle  

DOE Patents (OSTI)

A turbine nozzle and shroud assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components have a preestablished rate of thermal expansion greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes a plurality of segmented vane defining a first vane segment and a second vane segment, each of the first and second vane segments having a vertical portion, and each of the first vane segments and the second vane segments being positioned in functional relationship one to another within a recess formed within an outer shroud and an inner shroud. The turbine nozzle and shroud assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being less than the preestablished rate of thermal expansion of the other component. 4 figs.

Shaffer, J.E.; Norton, P.F.

1996-12-17T23:59:59.000Z

236

Ceramic turbine nozzle  

DOE Patents (OSTI)

A turbine nozzle and shroud assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and being attached to conventional metallic components. The metallic components having a preestablished rate of thermal expansion being greater than the preestablished rate of thermal expansion of the turbine nozzle vane assembly. The turbine nozzle vane assembly includes a plurality of segmented vane defining a first vane segment and a second vane segment. Each of the first and second vane segments having a vertical portion. Each of the first vane segments and the second vane segments being positioned in functional relationship one to another within a recess formed within an outer shroud and an inner shroud. The turbine nozzle and shroud assembly provides an economical, reliable and effective ceramic component having a preestablished rate of thermal expansion being less than the preestablished rate of thermal expansion of the other component.

Shaffer, James E. (Maitland, FL); Norton, Paul F. (San Diego, CA)

1996-01-01T23:59:59.000Z

237

Determining the influence of wind-wave breaking on the dissipation of the turbulent kinetic energy in the upper ocean and on the dependence of the turbulent kinetic energy on the stage of wind-wave development  

Science Journals Connector (OSTI)

New experimental data that make it possible to explain and predict the observed variability of turbulent-energy dissipation in the upper ocean are discussed. ... For this purpose, the dependence of the energy dis...

S. A. Kitaigorodskii

2009-06-01T23:59:59.000Z

238

Establishing a Testing Center for Ocean Energy Technologies in...  

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

Marine Renewable Energy Centers. NNMREC offers a full range of capabilities to support wave and tidal energy development for the United States. Ocean energy, generated from...

239

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

240

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

Note: This page contains sample records for the topic "turbines ocean waves" 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

Taming water waves Case study: Surface Water Waves  

E-Print Network (OSTI)

Taming water waves Case study: Surface Water Waves Few things in nature are as dramatic, and potentially dangerous, as ocean waves. The impact they have on our daily lives extends from shipping to the role they play in driving the global climate. From a theoretical viewpoint water waves pose rich

242

10.1098/rsta.2003.1286 Foundations for o shore wind turbines  

E-Print Network (OSTI)

10.1098/rsta.2003.1286 Foundations for o® shore wind turbines By B. W. Byrne a n d G. T. Houlsby will be to harvest electrical power from the vast energy reserves o®shore, through wind turbines or current or wave®shore wind turbines. A critical component is the connection of the structure to the ground, and in particular

Byrne, Byron

243

Cooled snubber structure for turbine blades  

DOE Patents (OSTI)

A turbine blade assembly in a turbine engine. The turbine blade assembly includes a turbine blade and a first snubber structure. The turbine blade includes an internal cooling passage containing cooling air. The first snubber structure extends outwardly from a sidewall of the turbine blade and includes a hollow interior portion that receives cooling air from the internal cooling passage of the turbine blade.

Mayer, Clinton A; Campbell, Christian X; Whalley, Andrew; Marra, John J

2014-04-01T23:59:59.000Z

244

Ocean Acidification  

Science Journals Connector (OSTI)

Ocean Acidification ... The first assignment I give my students in Environmental Modeling class is to calculate the mass of the oceans versus the mass of the atmosphere and the “living” soil. ... As a young chemical engineer in the early 1970s, I remember discussing the horrors of sulfur and particulate pollution from steel mills, smelters, and power plants. ...

Jerald L. Schnoor

2013-11-05T23:59:59.000Z

245

Composite turbine bucket assembly  

DOE Patents (OSTI)

A composite turbine blade assembly includes a ceramic blade including an airfoil portion, a shank portion and an attachment portion; and a transition assembly adapted to attach the ceramic blade to a turbine disk or rotor, the transition assembly including first and second transition components clamped together, trapping said ceramic airfoil therebetween. Interior surfaces of the first and second transition portions are formed to mate with the shank portion and the attachment portion of the ceramic blade, and exterior surfaces of said first and second transition components are formed to include an attachment feature enabling the transition assembly to be attached to the turbine rotor or disk.

Liotta, Gary Charles; Garcia-Crespo, Andres

2014-05-20T23:59:59.000Z

246

Aviation turbine fuels, 1980  

SciTech Connect

Properties of some aviation turbine fuels marketed in the United States during 1980 are presented in this report. The samples represented are typical 1980 production and were analyzed in the laboratories of 17 manufacturers of aviation turbine (jet) fuels. The data were submitted for study, calculation, and compilation under a cooperative agreement between the Department of Energy (DOE), Bartlesville Energy Technology Center (BETC), Bartlesville, Oklahoma, and the American Petroleum Institute (API). Results for the properties of 98 samples of aviation turbine fuels are included in the report for military grades JP-4 and JP-5 and commercial type Jet A.

Shelton, E.M.

1981-03-01T23:59:59.000Z

247

Aviation turbine fuels, 1982  

SciTech Connect

Properties of some aviation turbine fuels marketed in the United States during 1982 are presented in this report. The samples represented are typical 1982 production and were analyzed in the laboratories of 14 manufacturers of aviation turbine (jet) fuels. The data were submitted for study, calculation, and compilation under a cooperative agreement between the Department of Energy (DOE), Bartlesville Energy Technology Center (BETC), Bartlesville, Oklahoma, and the American Petroleum Institute (API). Results for the properties of 90 samples of aviation turbine fuels are included in the report for military grades JP-4 and HP-5, and commercial type Jet A.

Shelton, E.M.; Dickson, C.L.

1983-03-01T23:59:59.000Z

248

Aviation turbine fuels, 1979  

SciTech Connect

Properties of some aviation turbine fuels marketed in the United States during 1979 are presented in this report. The samples represented are typical 1979 production and were analyzed in the laboratories of 17 manufacturers of aviation turbine (jet) fuels. The data were submitted for study, calculation, and compilation under a cooperative agreement between the Department of Energy (DOE), Bartlesville Energy Technology Center (BETC), Bartlesville, Oklahoma, and the American Petroleum Institute (API). Results for the properties of 93 samples of aviation turbine fuels are included in the report for military grades JP-4 and JP-5, and commercial type Jet A.

Shelton, E.M.

1980-05-01T23:59:59.000Z

249

Aviation turbine fuels, 1981  

SciTech Connect

Properties of some aviation turbine fuels marketed in the United States during 1981 are presented in this report. The samples represented are typical 1981 production and were analyzed in the laboratories of 15 manufacturers of aviation turbine (jet) fuels. The data were submitted for study, calculation, and compilation under a cooperative agreement between the Department of Energy (DOE), Bartlesville Energy Technology Center (BETC), Bartlesville, Oklahoma, and the American Petroleum Institute (API). Results for the properties of 95 samples of aviation turbine fuels are included in the report for military grades JP-4 and JP-5, and commercial type Jet A.

Shelton, E.M.

1982-04-01T23:59:59.000Z

250

Gas turbine combustor transition  

DOE Patents (OSTI)

A method is described for converting a steam cooled transition to an air cooled transition in a gas turbine having a compressor in fluid communication with a combustor, a turbine section in fluid communication with the combustor, the transition disposed in a combustor shell and having a cooling circuit connecting a steam outlet and a steam inlet and wherein hot gas flows from the combustor through the transition and to the turbine section, includes forming an air outlet in the transition in fluid communication with the cooling circuit and providing for an air inlet in the transition in fluid communication with the cooling circuit. 7 figs.

Coslow, B.J.; Whidden, G.L.

1999-05-25T23:59:59.000Z

251

Water wave transmission by an array of floating discs  

Science Journals Connector (OSTI)

...high-concentration arrays are attributed to wave overwash of the discs and collisions...wave-scattering theories. They are used to predict attenuation rates of ocean-surface...ice-covered ocean, noting alternative theories to model waves in the ice-covered ocean also...

2015-01-01T23:59:59.000Z

252

Chapter 4 - Ocean Thermal Energy Converters  

Science Journals Connector (OSTI)

Publisher Summary The most plentiful renewable energy source on the planet is solar radiation. Harvesting this energy is difficult because of its dilute and erratic nature. Large collecting areas and large storage capacities are needed. These two requirements are satisfied by the tropical oceans. Oceans cover 71% of Earth's surface. In the tropics, they absorb sunlight, and the top layers heat up to some 25°C. Warm surface waters from the equatorial belt flow poleward, melting both the Arctic and the Antarctic ice. The resulting cold waters return to the equator at great depth, completing a huge planetary thermosyphon. Two basic configurations have been proposed for ocean thermal energy converters (OTECs)—those using hydraulic turbines and those using vapor turbines. The first uses the temperature difference between the surface and bottom waters to create a hydraulic head that drives a conventional water turbine. The advantages of this proposal include the absence of heat exchangers. It is easier to find warm surface water than sufficiently cool abyssal waters, which are not readily available in continental shelf regions. This limits the possible sitings of ocean thermal energy converters.

Aldo Vieira da Rosa

2009-01-01T23:59:59.000Z

253

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...

254

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...

255

Designed for: Ocean Observing Demo: A collaboration between  

E-Print Network (OSTI)

off of Fire Island, NY. The Wave Glider records data on the wind, water temperature and salinity pressure, temperature and sound velocity. The Wave Glider is an autonomous ocean observing platform

256

13.853 Computational Ocean Acoustics, Spring 2003  

E-Print Network (OSTI)

Wave equations for fluid and visco-elastic media. Wave-theory formulations of acoustic source radiation and seismo-acoustic propagation in stratified ocean waveguides. Wavenumber Integration and Normal Mode methods for ...

Schmidt, Henrik

257

Estimating Oceanic Turbulence Dissipation from Seismic Images  

Science Journals Connector (OSTI)

Seismic images of oceanic thermohaline finestructure record vertical displacements from internal waves and turbulence over large sections at unprecedented horizontal resolution. Where reflections follow isopycnals, their displacements can be used ...

W. Steven Holbrook; Ilker Fer; Raymond W. Schmitt; Daniel Lizarralde; Jody M. Klymak; L. Cody Helfrich; Robert Kubichek

2013-08-01T23:59:59.000Z

258

NETL: Turbines - UTSR Projects  

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

3 Aerodynamics and Heat Transfer Studies of Parameters Specific to the IGCC Requirements: High Mass Flow Endwall Contouring, Leading Edge Filleting and Blade Tip Ejection under Roating Turbine Condition Texas A&M University Meinhard Schobeiri 3 Aerodynamics and Heat Transfer Studies of Parameters Specific to the IGCC Requirements: High Mass Flow Endwall Contouring, Leading Edge Filleting and Blade Tip Ejection under Roating Turbine Condition Texas A&M University Meinhard Schobeiri Project Dates: 10/1/2009 - 9/30/2012 Area of Research: Aero/Heat Transfer Federal Project Manager: Robin Ames Project Objective: This project is advanced research designed to provide the gas turbine industry with a set of quantitative aerodynamic and film cooling effectiveness data essential to understanding the basic physics of complex secondary flows. This includes their influence on the efficiency and performance of gas turbines, and the impact that differing film cooling ejection arrangements have on suppressing the detrimental effect of these

259

NETL: Turbines Archive  

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

Archive Archive KEY: News News & Features Events Events Publications Publications Archive 09.26.2013 Publications The 2013 Hydrogen Turbine Program Portfolio has been posted to the Reference Shelf. 08.15.2013 News DOE Selects Ten Projects to Conduct Advanced Turbine Technology Research Ten university projects to conduct advanced turbine technology research under the Office of Fossil Energy's University Turbine Systems Research (UTSR) Program have been selected by the U.S. Department of Energy (DOE) for additional development. 07.15.2013 News NETL Innovations Recognized with R&D 100 Awards Two technologies advanced by the Office of Fossil Energy's National Energy Technology Laboratory (NETL) in collaboration with strategic partners have been recognized by R&D Magazine as among the 100 most technologically significant products introduced into the commercial marketplace within the past year.

260

NETL: Turbines - UTSR Projects  

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

7 Simulating Particle Deposition and Mitigating Deposition Degradation Effects in Film Cooled Turbine Sections University of Texas 7 Simulating Particle Deposition and Mitigating Deposition Degradation Effects in Film Cooled Turbine Sections University of Texas David Bogard Project Dates: 8/1/2007 - 9/30/2010 Area of Research: Aero/Heat Transfer Federal Project Manager: Mark Freeman Project Objective: A major goal of this project is to determine a reliable methodology for simulating contaminant deposition in a low-speed wind tunnel facility where testing is considerably less costly. The project is aimed at developing new cooling designs for turbine components that will minimize the effect of the depositions of contaminant particles on turbine components and maintain good film cooling performance even when surface conditions deteriorate. Moreover, a methodology will be established that

Note: This page contains sample records for the topic "turbines ocean waves" 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

Gas Turbine Emissions  

E-Print Network (OSTI)

Historically, preliminary design information regarding gas turbine emissions has been unreliable, particularly for facilities using steam injection and other forms of Best Available Control Technology (BACT). This was probably attributed to the lack...

Frederick, J. D.

262

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...

263

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

264

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.

265

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

266

MHK Technologies/Rotech Tidal Turbine RTT | Open Energy Information  

Open Energy Info (EERE)

Rotech Tidal Turbine RTT Rotech Tidal Turbine RTT < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Rotech Tidal Turbine RTT.jpg Technology Profile Primary Organization Lunar Energy Project(s) where this technology is utilized *MHK Projects/Lunar Energy St David s Peninsula Pembrokeshire South Wales UK *MHK Projects/Lunar Energy Wando Hoenggan Waterway South Korea Technology Resource Click here Current/Tidal Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 5/6: System Integration and Technology Laboratory Demonstration Technology Description he Rotech Tidal Turbine (RTT) is a bi-directional horizontal axis turbine housed in a symmetrical venturi duct. The Venturi duct draws the existing ocean currents into the RTT in order to capture and convert energy into electricity. Use of a gravity foundation will allow the RTT to be deployed quickly with little or no seabed preparation at depths in excess of 40 meters. This gives the RTT a distinct advantage over most of its competitors and opens up a potential energy resource that is five times the size of that available to companies using pile foundations.

267

Hydrogen Turbines | Department of Energy  

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

Hydrogen Turbines Hydrogen Turbines Hydrogen Turbines Hydrogen Turbines The Turbines of Tomorrow Combustion (gas) turbines are key components of advanced systems designed for new electric power plants in the United States. With gas turbines, power plants will supply clean, increasingly fuel-efficient, and relatively low-cost energy. Typically, a natural gas-fired combustion turbine-generator operating in a "simple cycle" converts between 25 and 35 percent of the natural gas heating value to useable electricity. Today, most new smaller power plants also install a recuperator to capture waste heat from the turbine's exhaust to preheat combustion air and boost efficiencies. In most of the new larger plants, a "heat recovery steam generator" is installed to recover waste

268

What can wave energy learn from offshore oil and gas?  

Science Journals Connector (OSTI)

...is happening in the wind power industry. Alternatively...and access and for power valuation. Persistence modelling for wind and wave conditions...components in wave power may be problematic. By analogy with wind turbine gearboxes...

2012-01-01T23:59:59.000Z

269

The Influence of Turbulence and Vertical Wind Profile in Wind Turbine Power Curve  

Science Journals Connector (OSTI)

To identify the influence of turbulence and vertical wind profile in wind turbine performance, wind speed measurements at different heights have been ... equipment, specifically a pulsed wave one. The wind profil...

A. Honrubia; A. Vigueras-Rodríguez…

2012-01-01T23:59:59.000Z

270

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

271

Ocean Energy  

Science Journals Connector (OSTI)

Some of these technologies are taking off from very low power capacities, although with an intense activity....4, 5] including La Rance tidal power station calculate a capacity of ocean energy facilities worldwid...

Ricardo Guerrero-Lemus; José Manuel Martínez-Duart

2013-01-01T23:59:59.000Z

272

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...

273

Ocean Currents  

Science Journals Connector (OSTI)

Water is continually in motion at all depths, even when the sea appears perfectly calm and flat. In Chaps. 3–6 of this book, we discussed a specific type of water motion, namely periodic wave motion. Waves can...

Prof. Dr. Stanis?aw Ryszard Massel

1999-01-01T23:59:59.000Z

274

Hydraulic Turbines: Types and Operational Aspects  

Science Journals Connector (OSTI)

The turbine is considered to be the heart of ... , the proper selection and operation of the turbine is very important.

Prof. Dr.-Ing Hermann-Josef Wagner…

2011-01-01T23:59:59.000Z

275

Efficient steam turbines produced by the “Ural Turbine Plant” company  

Science Journals Connector (OSTI)

Design features and efficiency of some steam turbines produced at present by a plant formed as a result of division of the “Turbine Motor Plant” Company into several enterprises are...

G. D. Barinberg; A. E. Valamin

276

Bottom steam turbines of the Ural Turbine Works  

Science Journals Connector (OSTI)

Basic design features, thermal schemes, and economic indicators of some bottom turbines that have been developed, as well as ... that have partially been manufactured at the Ural Turbine Works, are presented.

G. D. Barinberg; A. E. Valamin; Yu. A. Sakhnin

2008-08-01T23:59:59.000Z

277

Avian and Bat Assessment at the Lewes Wind Turbine  

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

and Bat Assessment at the Lewes Wind Turbine and Bat Assessment at the Lewes Wind Turbine University of Delaware College of Earth, Ocean and Environment March 1, 2013 A conference call was held with the advisory committee on February 14, 2013. On the call were Genevieve LaRouche (US Fish & Wildlife Service-USFWS), Julie Thompson (USFWS), Holly Niederriter (Delaware Department of Natural Resources and Environmental Control- DNREC), and William Fintel, (President of the Sussex Bird Club), Nancy Targett (Dean, College of Earth, Ocean, and Environment, University of Delaware-UD CEOE), and Jeremy Firestone, Professor, UD CEOE. The Advisory Committee was presented with the results of March - October of year 2 of the study and related recommendations (see attachments 1 and 2). Last year, on June 7, 2012,

278

Combined gas turbine-Rankine turbine power plant  

SciTech Connect

A combined gas turbine-Rankine cycle powerplant with improved part load efficiency is disclosed. The powerplant has a gas turbine with an organic fluid Rankine bottoming cycle which features an inter-cycle regenerator acting between the superheated vapor leaving the Rankine turbine and the compressor inlet air. The regenerator is used selectively as engine power level is reduced below maximum rated power.

Earnest, E.R.

1981-05-19T23:59:59.000Z

279

European Wave and Tidal Energy Conference  

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

The European Wave and Tidal Energy Conference (EWTEC) series are international, technical and scientific conferences, focussed on ocean renewable energy and widely respected for their commitment to...

280

Sandia National Laboratories: wave energy converters  

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

is a partnered effort to develop marine hydrokinetic (MHK) reference models (RMs) for wave energy converters and tidal, ocean, and river current energy converters. The RMP team...

Note: This page contains sample records for the topic "turbines ocean waves" 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

Turbine tip clearance loss mechanisms  

E-Print Network (OSTI)

Three-dimensional numerical simulations (RANS and URANS) were used to assess the impact of two specific design features, and of aspects of the actual turbine environment, on turbine blade tip loss. The calculations were ...

Mazur, Steven (Steven Andrew)

2013-01-01T23:59:59.000Z

282

Ceramics for ATS industrial turbines  

SciTech Connect

US DOE and most US manufacturers of stationary gas turbines are participating in a major national effort to develop advanced turbine systems (ATS). The ATS program will achieve ultrahigh efficiencies, environmental superiority, and cost competitiveness compared with current combustion turbine systems. A major factor in the improved efficiencies of simple cycle ATS gas turbines will be higher operating efficiencies than curren engines. These temperatures strain the limits of metallic alloy and flow-path cooling technologies. Ceramics materials offer a potential alterative to cooled turbine alloys for ATS turbines due to higher melting points than metallics. This paper evaluates ceramics technology and plant economic issues for ATS industrial turbine systems. A program with the objective of demonstrating first-stage ceramic vanes in a commerical industrial turbine is also described.

Wenglarz, R.; Ali, S. [Allison Engine Co., Indianapolis, IN (United States); Layne, A. [USDOE Morgantown Energy Technology Center, WV (United States)

1996-05-01T23:59:59.000Z

283

Design of a 6-DoF Robotic Platform for Wind Tunnel Tests of Floating Wind Turbines  

Science Journals Connector (OSTI)

Abstract Sophisticated computational aero-hydro-elastic tools are being developed for simulating the dynamics of Floating Offshore Wind Turbines (FOWTs). The reliabilty of such prediction tools for designers requires experimental validation. To this end, due to the lack of a large amount of full scale data available, scale tests represent a remarkable tool. Moreover, due to the combined aerodynamic and hydrodynamic contributions to the dynamics of FOWTs, experimental tests should take into account both. This paper presents the design process of a 6-Degrees-of-Freedom robot for simulating the dynamics of \\{FOWTs\\} in wind tunnel scale experiments, as a complementary approach with respect to ocean wind-wave basin scale tests. Extreme events were considered for the definition of the robot requirements and performance. A general overview on the possible design solutions is reported, then the machine architecture as well as the kinematic and dynamic analysis is discussed. Also a motion task related to a 5-MW Floating Offshore Wind Turbine nominal operating condition was considered and then the ability of the robot to reproduce such motions verified in terms of maximum displacements, forces and power, to be within the design boundaries.

I. Bayati; M. Belloli; D. Ferrari; F. Fossati; H. Giberti

2014-01-01T23:59:59.000Z

284

Gas Turbine Manufacturers Perspective  

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

Viability and Experience of IGCC From a Viability and Experience of IGCC From a Gas Turbine Manufacturers Perspective ASME - IGCC ASME - IGCC Turbo Turbo Expo Expo June 2001 June 2001 GE Power Systems g Klaus Brun, Ph.D. - Manager Process Power Plant Product & Market Development Robert M. Jones - Project Development Manager Process Power Plants Power Systems Power Systems General Electric Company General Electric Company ABSTRACT GE Power Systems g Economic Viability and Experience of IGCC From a Gas Turbine Manufacturers Perspective High natural gas fuel gas prices combined with new technology developments have made IGCC a competitive option when compared to conventional combined cycle or coal steam turbine cycles. Although the initial investment costs for an IGCC plant are still comparatively high, the low

285

NETL: Turbines - UTSR Projects  

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

65 Hafnia-based Nanostructured Thermal Barrier Coatings for Advanced Hydrogen Turbine Technology University of Texas -- El Paso 65 Hafnia-based Nanostructured Thermal Barrier Coatings for Advanced Hydrogen Turbine Technology University of Texas -- El Paso Chintalapalle Ramana Project Dates: 9/30/2009 - 9/30/2011 Area of Research: Materials Federal Project Manager: Briggs White Project Objective: This project is focused on developing novel coatings for high-H2 fired gas turbine components such that high efficiencies and long lifetimes may be acheived in Integrated Gasification Combined Cycle (IGCC) powerplants. Nanostructured Hafnia-based coatings will be develped for thermal barrier coatings (TBCs). A fundamental understanding of TBCs will be aquired and a knowledge database of next generation TBC materials with high-temperature tolerance, durability, and reliability will be generated.

286

Turbine nozzle attachment system  

DOE Patents (OSTI)

A nozzle guide vane assembly having a preestablished rate of thermal expansion is positioned in a gas turbine engine and is attached to conventional metallic components. The nozzle guide vane assembly includes a pair of legs extending radially outwardly from an outer shroud and a pair of mounting legs extending radially inwardly from an inner shroud. Each of the pair of legs and mounting legs have a pair of holes therein. A plurality of members attached to the gas turbine engine have a plurality of bores therein which axially align with corresponding ones of the pair of holes in the legs. A plurality of pins are positioned within the corresponding holes and bores radially positioning the nozzle guide vane assembly about a central axis of the gas turbine engine. 3 figs.

Norton, P.F.; Shaffer, J.E.

1995-10-24T23:59:59.000Z

287

Gas turbine noise control  

Science Journals Connector (OSTI)

The use of gas turbine powered generators and pumping stations are likely to increase over the next two decades. Alternative fuel systems utilizing fluidized coal beds are likely in the near future and direct combustion of pulverized coal is also a possibility. The primary problem of generally unacceptable noise levels from gas turbine powered equipment affects both community noise and hearing conservation alike. The noise criteria of such plant remain a significant design factor. The paper looks at the technical and historical aspects associated with the noise generation process and examines past present and possible future approaches to the problem of silencing gas turbine units; adequately specifying the acoustical criteria and ratings; evaluates the techniques by which these criteria should be measured; and correlates these with the typical results achieved in the field.

Louis A. Challis and Associates Pty. Ltd.

1979-01-01T23:59:59.000Z

288

www.cesos.ntnu.no Yihan Xing Centre for Ships and Ocean Structures Integrated analysis of  

E-Print Network (OSTI)

1 www.cesos.ntnu.no Yihan Xing ­ Centre for Ships and Ocean Structures Integrated analysis of wind results · Integrated analysis in combination with aero-elastic simulations. · Example of application.cesos.ntnu.no Yihan Xing ­ Centre for Ships and Ocean Structures Wind turbine drivetrain concepts · Three main groups

Nørvåg, Kjetil

289

The Orange River, southern Africa: an extreme example of a wave-dominated sediment dispersal system in the South Atlantic Ocean  

Science Journals Connector (OSTI)

...lower reaches cross a semi-arid and then an...although, as indicated by semi-submersible (JAGO) dives, the...submerged wave-cut rock platforms have been found at...Offshore mining and semi-submersible dives have shown that...

B.J. Bluck; J.D. Ward; J. Cartwright; Roger Swart

290

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

291

Turbine-generator replacement study  

SciTech Connect

This paper describes an engineering study for the replacement of a nominal 70 Mw turbine-generator in a multi-unit utility cogeneration station. The existing plant is briefly described, alternatives considered are discussed, and the conclusions reached are presented. Key topics are the turbine steam cycle evaluation and the turbine pedestal analysis.

Miller, E.F.; Stuhrke, S.P., Shah, A.A. (Burns and Roe Enterprises, Inc., Oradell, NJ (USA))

1988-01-01T23:59:59.000Z

292

E ect of a Simple Storm on a Simple Ocean Je Moehlis  

E-Print Network (OSTI)

can excite near-inertial currents in the mixed layer of the ocean; recent observations include [8, 13E#11;ect of a Simple Storm on a Simple Ocean Je#11; Moehlis 1 Introduction: Near-frequency cuto#11; for internal waves in the ocean. An internal wave with frequency near f is called a near

Moehlis, Jeff

293

Ceramic gas turbine shroud  

DOE Patents (OSTI)

An example gas turbine engine shroud includes a first annular ceramic wall having an inner side for resisting high temperature turbine engine gasses and an outer side with a plurality of radial slots. A second annular metallic wall is positioned radially outwardly of and enclosing the first annular ceramic wall and has a plurality of tabs in communication with the slot of the first annular ceramic wall. The tabs of the second annular metallic wall and slots of the first annular ceramic wall are in communication such that the first annular ceramic wall and second annular metallic wall are affixed.

Shi, Jun; Green, Kevin E.

2014-07-22T23:59:59.000Z

294

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

295

Refurbishing steam turbines  

SciTech Connect

Power-plant operators are reducing maintenance costs of their aging steam turbines by using wire-arc spray coating and shot peening to prolong the service life of components, and by replacing outmoded bearings and seals with newer designs. Steam-turbine operators are pressed with the challenge of keeping their aging machines functioning in the face of wear problems that are exacerbated by the demand for higher efficiencies. These problems include intense thermal cycling during both start-up and shutdown, water particles in steam and solid particles in the air that pit smooth surfaces, and load changes that cause metal fatigue.

Valenti, M.

1997-12-01T23:59:59.000Z

296

ADVANCED TURBINE SYSTEMS PROGRAM  

SciTech Connect

Natural gas combustion turbines are rapidly becoming the primary technology of choice for generating electricity. At least half of the new generating capacity added in the US over the next twenty years will be combustion turbine systems. The Department of Energy has cosponsored with Siemens Westinghouse, a program to maintain the technology lead in gas turbine systems. The very ambitious eight year program was designed to demonstrate a highly efficient and commercially acceptable power plant, with the ability to fire a wide range of fuels. The main goal of the Advanced Turbine Systems (ATS) Program was to develop ultra-high efficiency, environmentally superior and cost effective competitive gas turbine systems for base load application in utility, independent power producer and industrial markets. Performance targets were focused on natural gas as a fuel and included: System efficiency that exceeds 60% (lower heating value basis); Less than 10 ppmv NO{sub x} emissions without the use of post combustion controls; Busbar electricity that are less than 10% of state of the art systems; Reliability-Availability-Maintainability (RAM) equivalent to current systems; Water consumption minimized to levels consistent with cost and efficiency goals; and Commercial systems by the year 2000. In a parallel effort, the program was to focus on adapting the ATS engine to coal-derived or biomass fuels. In Phase 1 of the ATS Program, preliminary investigators on different gas turbine cycles demonstrated that net plant LHV based efficiency greater than 60% was achievable. In Phase 2 the more promising cycles were evaluated in greater detail and the closed-loop steam-cooled combined cycle was selected for development because it offered the best solution with least risk for achieving the ATS Program goals for plant efficiency, emissions, cost of electricity and RAM. Phase 2 also involved conceptual ATS engine and plant design and technology developments in aerodynamics, sealing, combustion, cooling, materials, coatings and casting development. The market potential for the ATS gas turbine in the 2000-2014 timeframe was assessed for combined cycle, simple cycle and integrated gasification combined cycle, for three engine sizes. The total ATS market potential was forecasted to exceed 93 GW. Phase 3 and Phase 3 Extension involved further technology development, component testing and W501ATS engine detail design. The technology development efforts consisted of ultra low NO{sub x} combustion, catalytic combustion, sealing, heat transfer, advanced coating systems, advanced alloys, single crystal casting development and determining the effect of steam on turbine alloys. Included in this phase was full-load testing of the W501G engine at the McIntosh No. 5 site in Lakeland, Florida.

Gregory Gaul

2004-04-21T23:59:59.000Z

297

Multiple piece turbine airfoil  

DOE Patents (OSTI)

A turbine airfoil, such as a rotor blade or a stator vane, for a gas turbine engine, the airfoil formed as a shell and spar construction with a plurality of dog bone struts each mounted within openings formed within the shell and spar to allow for relative motion between the spar and shell in the airfoil chordwise direction while also forming a seal between adjacent cooling channels. The struts provide the seal as well as prevent bulging of the shell from the spar due to the cooling air pressure.

Kimmel, Keith D (Jupiter, FL); Wilson, Jr., Jack W. (Palm Beach Gardens, FL)

2010-11-02T23:59:59.000Z

298

Velocity pump reaction turbine  

DOE Patents (OSTI)

An expanding hydraulic/two-phase velocity pump reaction turbine including a dual concentric rotor configuration with an inter-rotor annular flow channel in which the inner rotor is mechanically driven by the outer rotor. In another embodiment, the inner rotor is immobilized and provided with gas recovery ports on its outer surface by means of which gas in solution may be recovered. This velocity pump reaction turbine configuration is capable of potential energy conversion efficiencies of up to 70%, and is particularly suited for geothermal applications.

House, Palmer A. (Walnut Creek, CA)

1982-01-01T23:59:59.000Z

299

Velocity pump reaction turbine  

DOE Patents (OSTI)

An expanding hydraulic/two-phase velocity pump reaction turbine including a dual concentric rotor configuration with an inter-rotor annular flow channel in which the inner rotor is mechanically driven by the outer rotor. In another embodiment, the inner rotor is immobilized and provided with gas recovery ports on its outer surface by means of which gas in solution may be recovered. This velocity pump reaction turbine configuration is capable of potential energy conversion efficiencies of up to 70%, and is particularly suited for geothermal applications.

House, Palmer A. (Walnut Creek, CA)

1984-01-01T23:59:59.000Z

300

Table 1 Highest tides (tide ranges) of the global ocean Country Site Tide range (m)  

E-Print Network (OSTI)

and Climate. Indian Ocean Equatorial Currents. Internal Waves. Island Wakes. Langmuir Circula- tion and Instability. Mesoscale Eddies. Open Ocean Convection. Paci\\c Ocean Equatorial Currents. TurbulenceTable 1 Highest tides (tide ranges) of the global ocean Country Site Tide range (m) Canada Bay

Gorban, Alexander N.

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


301

Wind Wave Float | Department of Energy  

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

(TRL 1 2 3 Component) Ocean Power Technologies (TRL 5 6 System) - PB500, 500 kW Utility-Scale PowerBuoy Project WaveBob (TRL 5 6 System) - Advanced Wave Energy Conversion Project...

302

Wave Breaking Dissipation Observed with “SWIFT” Drifters  

Science Journals Connector (OSTI)

Energy dissipation rates during ocean wave breaking are estimated from high-resolution profiles of turbulent velocities collected within 1 m of the surface. The velocity profiles are obtained from a pulse-coherent acoustic Doppler sonar on a wave-...

Jim Thomson

2012-12-01T23:59:59.000Z

303

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

304

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

305

NETL: Turbine Projects - Cost Reduction  

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

Cost Reduction Cost Reduction Turbine Projects Cost Reduction Single Crystal Turbine Blades Enhancing Gas Turbine Efficiency Data/Fact Sheets Enabling and Information Technologies to Increase RAM of Advanced Powerplants Data/Fact Sheets Development of NDE Technology for Environmental Barrier Coating and Residual Life Estimation Data/Fact Sheets Welding and Weld Repair of Single Crystal Gas Turbine Alloy Data/Fact Sheets Combustion Turbine Hot Section Coating Life Management Data/Fact Sheets On-Line Thermal Barrier Coating Monitor for Real-Time Failure Protection and Life Maximization Data/Fact Sheets On-Line Thermal Barrier Coating [PDF] Advanced Monitoring to Improve Combustion Turbine/Combined Cycle RAM Data/Fact Sheets Advanced Monitoring to Improve Combustion Turbine [PDF]

306

Small gas turbine technology  

Science Journals Connector (OSTI)

Small Gas Turbine Technology: Small gas turbine, in the power range up to 500 kW, requires a recuperated thermodynamic cycle to achieve an electrical efficiency of about 30%. This efficiency is the optimum, which is possible for a cycle pressure ratio of about 4–1. The cycle airflow is function of the power requirement. To increase the efficiency, in view to reduce the CO2 emission, it is mandatory to develop a more efficient thermodynamic cycle. Different thermodynamic cycles were examined and the final choice was made for an Intercooled, Recuperated cycle. The advantage of this cycle, for the same final electrical efficiency of about 35%, is the smaller cycle airflow, which is the most dimensional parameter for the important components as the heat exchanger recuperator and the combustion chamber. In parallel with the thermodynamic cycle it is necessary to develop the High Speed Alternator technology, integrated on the same shaft that the gas turbine rotating components, to achieve the constant efficiency at part loads, from 50% up to 100%, by the capacity to adjust the engine speed at the required load. To satisfy the stringent requirement in pollutant emissions of \\{NOx\\} and CO, the catalytic combustion system is the most efficient and this advance technology has to be proven. The major constraints for the small gas turbine technology development are the production cost and the maintenance cost of the unit. In the power range of 0–500 kW the gas turbine technology is in competition with small reciprocating engines, which are produced in large quantity for automotive industry, at a very low production cost.

Andre Romier

2004-01-01T23:59:59.000Z

307

8 - Radial-Inflow Turbines  

Science Journals Connector (OSTI)

Publisher Summary The inward-flow radial turbine covers tremendous ranges of power, rates of mass flow, and rotational speeds from very large Francis turbines used in hydroelectric power generation and developing hundreds of megawatts down to tiny closed cycle gas turbines for space power generation of a few kilowatts. The widespread adoption of variable geometry turbines for diesel engine turbochargers has been the major factor in increasing the commercial use of this technology. Variable area is commonly, but not exclusively, achieved by pivoting the nozzle vanes about an axis disposed in the span-wise direction. The most common radial-inflow turbine applications are turbochargers for internal combustion engines, natural gas, diesel, and gasoline powered units. The advantage of a turbocharger is that it compresses the air, thus letting the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Applications of turbo expanders in the chemical industry abound in the petrochemical and chemical industries. Turbo expanders using radial-inflow turbines have a much higher ruggedness than turbo expanders using axial-flow turbines. The radial-inflow turbine for gas turbine application is basically a centrifugal compressor with reversed flow and opposite rotation. The performance of the radial-inflow turbine is being investigated with increased interest by the transportation and chemical industries. In the petrochemical industry, it is used in expander designs, gas liquefaction expanders and other cryogenic systems. The radial-inflow turbine’s greatest advantage is that the work produced by a single stage is equivalent to that of two or more stages in an axial turbine. Its cost is also much lower than that of a single- or multi-stage axial-flow turbine. The configurations and designs of the two types of radial-inflow turbine (cantilever and mixed-flow) are described. The thermodynamic and aerodynamic principles governing a radial-inflow turbine are summarized. The design and performance of a radial-inflow turbine are discussed. The potential problems (erosion; exducer blade vibration; noise) and types of losses in a radial-inflow turbine are described. Applications of radial-inflow turbines (e.g. turbochargers) are discussed.

Meherwan P. Boyce

2012-01-01T23:59:59.000Z

308

SMART POWER TURBINE  

SciTech Connect

Gas turbines are the choice technology for high-performance power generation and are employed in both simple and combined cycle configurations around the world. The Smart Power Turbine (SPT) program has developed new technologies that are needed to further extend the performance and economic attractiveness of gas turbines for power generation. Today's power generation gas turbines control firing temperatures indirectly, by measuring the exhaust gas temperature and then mathematically calculating the peak combustor temperatures. But temperatures in the turbine hot gas path vary a great deal, making it difficult to control firing temperatures precisely enough to achieve optimal performance. Similarly, there is no current way to assess deterioration of turbine hot-gas-path components without shutting down the turbine. Consequently, maintenance and component replacements are often scheduled according to conservative design practices based on historical fleet-averaged data. Since fuel heating values vary with the prevalent natural gas fuel, the inability to measure heating value directly, with sufficient accuracy and timeliness, can lead to maintenance and operational decisions that are less than optimal. GE Global Research Center, under this Smart Power Turbine program, has developed a suite of novel sensors that would measure combustor flame temperature, online fuel lower heating value (LHV), and hot-gas-path component life directly. The feasibility of using the ratio of the integrated intensities of portions of the OH emission band to determine the specific average temperature of a premixed methane or natural-gas-fueled combustion flame was demonstrated. The temperature determined is the temperature of the plasma included in the field of view of the sensor. Two sensor types were investigated: the first used a low-resolution fiber optic spectrometer; the second was a SiC dual photodiode chip. Both methods worked. Sensitivity to flame temperature changes was remarkably high, that is a 1-2.5% change in ratio for an 11.1 C (20 F) change in temperature at flame temperatures between 1482.2 C (2700 F) and 1760 C (3200 F). Sensor ratio calibration was performed using flame temperatures determined by calculations using the amount of unburned oxygen in the exhaust and by the fuel/air ratio of the combustible gas mixture. The agreement between the results of these two methods was excellent. The sensor methods characterized are simple and viable. Experiments are underway to validate the GE Flame Temperature Sensor as a practical tool for use with multiburner gas turbine combustors. The lower heating value (LHV) Fuel Quality Sensor consists of a catalytic film deposited on the surface of a microhotplate. This micromachined design has low heat capacity and thermal conductivity, making it ideal for heating catalysts placed on its surface. Several methods of catalyst deposition were investigated, including micropen deposition and other proprietary methods, which permit precise and repeatable placement of the materials. The use of catalysts on the LHV sensor expands the limits of flammability (LoF) of combustion fuels as compared with conventional flames; an unoptimized LoF of 1-32% for natural gas (NG) in air was demonstrated with the microcombustor, whereas conventionally 4 to 16% is observed. The primary goal of this work was to measure the LHV of NG fuels. The secondary goal was to determine the relative quantities of the various components of NG mixes. This determination was made successfully by using an array of different catalysts operating at different temperatures. The combustion parameters for methane were shown to be dependent on whether Pt or Pd catalysts were used. In this project, significant effort was expended on making the LHV platform more robust by the addition of high-temperature stable materials, such as tantalum, and the use of passivation overcoats to protect the resistive heater/sensor materials from degradation in the combustion environment. Modeling and simulation were used to predict improved sensor designs.

Nirm V. Nirmalan

2003-11-01T23:59:59.000Z

309

Turbine blade tip gap reduction system  

SciTech Connect

A turbine blade sealing system for reducing a gap between a tip of a turbine blade and a stationary shroud of a turbine engine. The sealing system includes a plurality of flexible seal strips extending from a pressure side of a turbine blade generally orthogonal to the turbine blade. During operation of the turbine engine, the flexible seal strips flex radially outward extending towards the stationary shroud of the turbine engine, thereby reducing the leakage of air past the turbine blades and increasing the efficiency of the turbine engine.

Diakunchak, Ihor S.

2012-09-11T23:59:59.000Z

310

Wave Energy Conversion Technology  

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

Wave Energy Conversion Technology Wave Energy Conversion Technology Speaker(s): Mirko Previsic Date: August 2, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Julie Osborn Scientists have been working on wave power conversion for the past twenty years, but recent advances in offshore and IT technologies have made it economically competitive. Sea Power & Associates is a Berkeley-based renewable energy technology company. We have developed patented technology to generate electricity from ocean wave energy using a system of concrete buoys and highly efficient hydraulic pumps. Our mission is to provide competitively priced, non-polluting, renewable energy for coastal regions worldwide. Mirko Previsic, founder and CEO, of Sea Power & Associates will discuss ocean wave power, existing technologies for its conversion into

311

Oceans '88  

SciTech Connect

These proceedings discuss the following papers: Solid waste disposal crisis; Plastics in Ocean; Continental shelf environmental research; Seafood technology advancements; Gulf of Mexico chemosynthetic petroleum seep communities; Water reuse on onshore mariculture and processing facilities; Oil and gas industry conflicts on the outer continental shelf; Cumulative environmental effects of the oil and gas leasing program; Oil and gas exploration; and Oil and gas resource management; Aids to navigation systems and equipment; and Surveillance experiments.

Not Available

1988-01-01T23:59:59.000Z

312

WAVE-DRIVEN SURFACE FROM HF RADAR  

E-Print Network (OSTI)

experiments using the University of Miami's Ocean Surface Current Radar (OSCR) (Shay et al., 1995, 1997 to the internal wave signals. Observations The HF radar system mapped the coastal ocean currents over a 30 Ã? 45 kmFEATURE INTERNAL CURRENTS WAVE-DRIVEN SURFACE FROM HF RADAR By Lynn K. Shay Observations from

Miami, University of

313

Sandia National Laboratories: turbine-to-turbine interaction...  

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...

314

Turbine seal assembly  

DOE Patents (OSTI)

A seal assembly that limits gas leakage from a hot gas path to one or more disc cavities in a turbine engine. The seal assembly includes a seal apparatus that limits gas leakage from the hot gas path to a respective one of the disc cavities. The seal apparatus comprises a plurality of blade members rotatable with a blade structure. The blade members are associated with the blade structure and extend toward adjacent stationary components. Each blade member includes a leading edge and a trailing edge, the leading edge of each blade member being located circumferentially in front of the blade member's corresponding trailing edge in a direction of rotation of the turbine rotor. The blade members are arranged such that a space having a component in a circumferential direction is defined between adjacent circumferentially spaced blade members.

Little, David A.

2013-04-16T23:59:59.000Z

315

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

316

Advanced Hydrogen Turbine Development  

SciTech Connect

Siemens has developed a roadmap to achieve the DOE goals for efficiency, cost reduction, and emissions through innovative approaches and novel technologies which build upon worldwide IGCC operational experience, platform technology, and extensive experience in G-class operating conditions. In Phase 1, the technologies and concepts necessary to achieve the program goals were identified for the gas turbine components and supporting technology areas and testing plans were developed to mitigate identified risks. Multiple studies were conducted to evaluate the impact in plant performance of different gas turbine and plant technologies. 2015 gas turbine technologies showed a significant improvement in IGCC plant efficiency, however, a severe performance penalty was calculated for high carbon capture cases. Thermodynamic calculations showed that the DOE 2010 and 2015 efficiency targets can be met with a two step approach. A risk management process was instituted in Phase 1 to identify risk and develop mitigation plans. For the risks identified, testing and development programs are in place and the risks will be revisited periodically to determine if changes to the plan are necessary. A compressor performance prediction has shown that the design of the compressor for the engine can be achieved with additional stages added to the rear of the compressor. Tip clearance effects were studied as well as a range of flow and pressure ratios to evaluate the impacts to both performance and stability. Considerable data was obtained on the four candidate combustion systems: diffusion, catalytic, premix, and distributed combustion. Based on the results of Phase 1, the premixed combustion system and the distributed combustion system were chosen as having the most potential and will be the focus of Phase 2 of the program. Significant progress was also made in obtaining combustion kinetics data for high hydrogen fuels. The Phase 1 turbine studies indicate initial feasibility of the advanced hydrogen turbine that meets the aggressive targets set forth for the advanced hydrogen turbine, including increased rotor inlet temperature (RIT), lower total cooling and leakage air (TCLA) flow, higher pressure ratio, and higher mass flow through the turbine compared to the baseline. Maintaining efficiency with high mass flow Syngas combustion is achieved using a large high AN2 blade 4, which has been identified as a significant advancement beyond the current state-of-the-art. Preliminary results showed feasibility of a rotor system capable of increased power output and operating conditions above the baseline. In addition, several concepts were developed for casing components to address higher operating conditions. Rare earth modified bond coat for the purpose of reducing oxidation and TBC spallation demonstrated an increase in TBC spallation life of almost 40%. The results from Phase 1 identified two TBC compositions which satisfy the thermal conductivity requirements and have demonstrated phase stability up to temperatures of 1850 C. The potential to join alloys using a bonding process has been demonstrated and initial HVOF spray deposition trials were promising. The qualitative ranking of alloys and coatings in environmental conditions was also performed using isothermal tests where significant variations in alloy degradation were observed as a function of gas composition. Initial basic system configuration schematics and working system descriptions have been produced to define key boundary data and support estimation of costs. Review of existing materials in use for hydrogen transportation show benefits or tradeoffs for materials that could be used in this type of applications. Hydrogen safety will become a larger risk than when using natural gas fuel as the work done to date in other areas has shown direct implications for this type of use. Studies were conducted which showed reduced CO{sub 2} and NOx emissions with increased plant efficiency. An approach to maximize plant output is needed in order to address the DOE turbine goal for 20-30% reduction o

Joesph Fadok

2008-01-01T23:59:59.000Z

317

Gas turbine cooling system  

DOE Patents (OSTI)

A gas turbine engine (10) having a closed-loop cooling circuit (39) for transferring heat from the hot turbine section (16) to the compressed air (24) produced by the compressor section (12). The closed-loop cooling system (39) includes a heat exchanger (40) disposed in the flow path of the compressed air (24) between the outlet of the compressor section (12) and the inlet of the combustor (14). A cooling fluid (50) may be driven by a pump (52) located outside of the engine casing (53) or a pump (54) mounted on the rotor shaft (17). The cooling circuit (39) may include an orifice (60) for causing the cooling fluid (50) to change from a liquid state to a gaseous state, thereby increasing the heat transfer capacity of the cooling circuit (39).

Bancalari, Eduardo E. (Orlando, FL)

2001-01-01T23:59:59.000Z

318

Multiple piece turbine airfoil  

SciTech Connect

A turbine airfoil, such as a rotor blade or a stator vane, for a gas turbine engine, the airfoil formed as a shell and spar construction with a plurality of hook shaped struts each mounted within channels extending in a spanwise direction of the spar and the shell to allow for relative motion between the spar and shell in the airfoil chordwise direction while also fanning a seal between adjacent cooling channels. The struts provide the seal as well as prevent bulging of the shell from the spar due to the cooling air pressure. The hook struts have a hooked shaped end and a rounded shaped end in order to insert the struts into the spar.

Kimmel, Keith D (Jupiter, FL)

2010-11-09T23:59:59.000Z

319

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.

320

Generating electricity from the oceans  

Science Journals Connector (OSTI)

Ocean energy has many forms, encompassing tides, surface waves, ocean circulation, salinity and thermal gradients. This paper will considers two of these, namely those found in the kinetic energy resource in tidal streams or marine currents, driven by gravitational effects, and the resources in wind-driven waves, derived ultimately from solar energy. There is growing interest around the world in the utilisation of wave energy and marine currents (tidal stream) for the generation of electrical power. Marine currents are predictable and could be utilised without the need for barrages and the impounding of water, whilst wave energy is inherently less predictable, being a consequence of wind energy. The conversion of these resources into sustainable electrical power offers immense opportunities to nations endowed with such resources and this work is partially aimed at addressing such prospects. The research presented conveys the current status of wave and marine current energy conversion technologies addressing issues related to their infancy (only a handful being at the commercial prototype stage) as compared to others such offshore wind. The work establishes a step-by-step approach that could be used in technology and project development, depicting results based on experimental and field observations on device fundamentals, modelling approaches, project development issues. It includes analysis of the various pathways and approaches needed for technology and device or converter deployment issues. As most technology developments are currently UK based, the paper also discusses the UK's financial mechanisms available to support this area of renewable energy, highlighting the needed economic approaches in technology development phases. Examination of future prospects for wave and marine current ocean energy technologies are also discussed.

AbuBakr S. Bahaj

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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.
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321

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

322

Turbine cooling waxy oil  

SciTech Connect

A process for pipelining a waxy oil to essentially eliminate deposition of wax on the pipeline wall is described comprising: providing a pressurized mixture of the waxy oil and a gas; effecting a sudden pressure drop of the mixture of the oil and the gas through an expansion turbine, thereby expanding the gas and quickly cooling the oil to below its cloud point in the substantial absence of wax deposition and forming a slurry of wax particles and oil; and pipelining the slurry.

Geer, J.S.

1987-10-27T23:59:59.000Z

323

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

324

Anticipatory control of turbine generators  

E-Print Network (OSTI)

of Turbine Generators. (Nay 1971) Freddie Laurel Nessec, B. S. E. E, , Texas Tech University; Directed by: Professor J. S . Denison An investigation is made of the use of predicted loads in controlling turbine generators. A perturbation model of a turbine... generator is presented along with typical parameter values. A study is made of the effects of applying control action before a load change occurs. Two predictive control schemes are investi- gated using a load cycle which incorporates both ramp and step...

Messec, Freddie Laurel

1971-01-01T23:59:59.000Z

325

THOR Turner Hunt Ocean Renewable LLC | Open Energy Information  

Open Energy Info (EERE)

Turner Hunt Ocean Renewable LLC Turner Hunt Ocean Renewable LLC Jump to: navigation, search Name THOR Turner Hunt Ocean Renewable LLC Address 3814 West St Place Cincinnati Zip 45227 Sector Marine and Hydrokinetic Year founded 2007 Phone number 513-527-4924 Website http://http://www.thorocean.co Region United States LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Technologies: THOR Ocean Current Turbine This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=THOR_Turner_Hunt_Ocean_Renewable_LLC&oldid=678473" Categories: Clean Energy Organizations Companies Organizations

326

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...

327

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

328

Large eddy simulation applications in gas turbines  

Science Journals Connector (OSTI)

...exhaust plume development. The application...modelling in the gas turbine combustor...modelling strategies for the complex...flows in the gas turbine, as surveyed...of typical gas turbine parts necessitates...made in the development and application...

2009-01-01T23:59:59.000Z

329

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

330

The military aircraft gas turbine  

Science Journals Connector (OSTI)

The development of the gas turbine for use in military aircraft is discussed. The advancing fields of component technology and engine testing are also outlined

R.M. Denning; R.J. Lane

1983-01-01T23:59:59.000Z

331

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

332

Internal Waves and Tidal Conversion from a Finite Submarine Ridge  

E-Print Network (OSTI)

. The ocean, due to the constantly varying density gradient, effectively has a long boundary gradient across waves. In a density stratified fluid, which in the ocean is caused by variations in salinity

Morrison, Philip J.,

333

Massachusetts Ocean Management Plan (Massachusetts) | Department of Energy  

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

Massachusetts Ocean Management Plan (Massachusetts) Massachusetts Ocean Management Plan (Massachusetts) Massachusetts Ocean Management Plan (Massachusetts) < Back Eligibility Construction Industrial Installer/Contractor Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Savings Category Water Buying & Making Electricity Wind Program Info State Massachusetts Program Type Siting and Permitting Provider Executive Office of Energy and Environmental Affairs The Massachusetts Ocean Act of 2008 required the state's Secretary of Energy and Environmental Affairs to develop a comprehensive ocean management plan for the state by the end of 2009. That plan identified certain state waters that are eligible for offshore wind, wave and tidal energy development and other state waters where such development is

334

Ocean Motion International LLC | Open Energy Information  

Open Energy Info (EERE)

Ocean Motion International LLC Ocean Motion International LLC Jump to: navigation, search Name Ocean Motion International LLC Place Saulsbury, Tennessee Zip 38067 Sector Ocean Product Marine energy technology firm developing ocean/ wave powered generators. Coordinates 35.052242°, -89.083299° 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":35.052242,"lon":-89.083299,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

335

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

336

Ocean Power Technologies (TRL 5 6 System) - PB500, 500 kW Utility...  

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

technologiesinchart.ppt More Documents & Publications Advanced, High Power, Next Scale, Wave Energy Conversion Device Ocean Power Technologies (TRL 7 8 System) - Reedsport PB150...

337

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

338

Developing Biological Specifications for Fish Friendly Turbines...  

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

Developing Biological Specifications for Fish Friendly Turbines Developing Biological Specifications for Fish Friendly Turbines This factsheet explains studies conducted in a...

339

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...

340

Turbine Electric Power Inc | Open Energy Information  

Open Energy Info (EERE)

Turbine Electric Power Inc Sector: Vehicles Product: US-based, holder of the 'exclusive worldwide rights' to install, sell, market and distribute a new 'high tech' micro turbine...

Note: This page contains sample records for the topic "turbines ocean waves" 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

Advanced Manufacturing Initiative Improves Turbine Blade Productivity...  

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

Advanced Manufacturing Initiative Improves Turbine Blade Productivity Advanced Manufacturing Initiative Improves Turbine Blade Productivity May 20, 2011 - 2:56pm Addthis This is an...

342

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...

343

MHK Technologies/Turbines OWC | Open Energy Information  

Open Energy Info (EERE)

OWC OWC < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Turbines OWC.png Technology Profile Primary Organization Neo Aerodynamic Technology Resource Click here Wave Technology Type Click here Cross Flow Turbine Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The patent pending Neo Aerodynamic turbine invented by Phi Tran harnesses torque from both kinetic and pneumatic energy of the fluid flow wind or water Since the lift forces are caused by artificial flow of the fluid air wind around the center of the turbine the turbine s worst enemy turbulence is neutralized On the wind facing wind make side the flow are then redirect outward form the center It then causes the lift on airfoils to push it turning Once the device is turning it causes the center to have lower pressure the outside air then rushes in to fill those vacuums This flow is then redirected to cause lift on the airfoil When turning the special arrange of the airfoil allowing the volume of the air passing through the upper chamber are always more then of the lower chamber This also causes the lift to make the device turn In short Neo Aerodynamic uses the artificial flow of the air to cause the lift on its airfoils That s why it s called Neo AeroDy

344

Development of the helical reaction hydraulic turbine. Final technical report, July 1, 1996--June 30, 1998  

SciTech Connect

The present report contains the final results obtained during July 1996--July 1998. This report should be considered in association with the Annual Progress Report submitted in July 1997 due to the fact that not all of the intermediate results reflected in the Progress Report have been included in the Final Report. The aim of the project was to build a helical hydraulic turbine prototype and demonstrate its suitability and advantages as a novel apparatus to harness hydropower from ultra low-head rivers and other free water streams such as ocean currents or rivers without dams. The research objectives of the project are: Design, optimization and selection of the hydro foil section for the helical turbine; Design of the turbine for demonstration project; Construction and testing of the turbine module; Assessing test results and determining scale-up feasibility. The research conducted under this project has substantially exceeded the original goals including designing, constructing and testing of a scaled-up triple-helix turbine, as well as developing recommendations for application of the turbine for direct water pumping in irrigation systems and for future use in wind farms. Measurements collected during two years of turbine testing are kept in the PI files.

Gorlov, A.

1998-08-01T23:59:59.000Z

345

Wave power extraction from a bottom-mounted oscillating water column converter with a V-shaped channel  

Science Journals Connector (OSTI)

...CW Finkl. 2009 Ocean energy. Berlin, Germany...ME . 1981 Ocean wave energy conversion. New York, NY: Wiley Interscience...Justino. 1999 OWC wave energy devices with air flow...mathematical tables. New York, NY: Dover. 23 Mavrakos...

2014-01-01T23:59:59.000Z

346

Recent Advances in Turbines1  

Science Journals Connector (OSTI)

... ON two previous occasions I have addressed this institution on the steam turbine. At the time of the first lecture, in 1900, the ... . At the time of the first lecture, in 1900, the turbine may be described as having been in the “advanced experimental stage.”Six years later ...

1911-04-20T23:59:59.000Z

347

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

348

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

349

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

350

Ocean | Open Energy Information  

Open Energy Info (EERE)

Related Links List of Ocean Thermal Incentives Retrieved from "http:en.openei.orgwindex.php?titleOcean&oldid273467" Categories: Articles with outstanding TODO tasks Sectors...

351

Aero Turbine | Open Energy Information  

Open Energy Info (EERE)

Aero Turbine Aero Turbine Jump to: navigation, search Name Aero Turbine Facility Aero Turbine Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner AeroTurbine Energy Company Location Riverside County CA Coordinates 33.7437°, -115.9925° 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":33.7437,"lon":-115.9925,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

352

The Role of Internal Tides in Mixing the Deep Ocean  

Science Journals Connector (OSTI)

Internal wave theory is used to examine the generation, radiation, and energy dissipation of internal tides in the deep ocean. Estimates of vertical energy flux based on a previously developed model are adjusted to account for the influence of ...

Louis St. Laurent; Chris Garrett

2002-10-01T23:59:59.000Z

353

NREL Computer Models Integrate Wind Turbines with Floating Platforms (Fact Sheet), The Spectrum of Clean Energy Innovation, NREL (National Renewable Energy Laboratory)  

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

Computer Models Computer Models Integrate Wind Turbines with Floating Platforms 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. Coupling wind turbines and floating platforms requires complex computer models. Land- based wind turbines are designed and analyzed using simulation tools, called computer-aided engineering (CAE) design tools, that are capable of predicting a design's dynamic response to

354

Boussinesq-Green-Naghdi Rotational Water Wave Theory.  

E-Print Network (OSTI)

??A coastal ocean hydrodynamics modelling system has been created, with potential for future improvement. The system consists of a wave generation-absorbing system which initiates the… (more)

Zhang, Yao

2014-01-01T23:59:59.000Z

355

A remotely operated, autonomous wave energy converter system.  

E-Print Network (OSTI)

??The potential for electric energy generation from ocean waves is substantial and much research is being conducted on the conversion process as a renewable, grid-connected,… (more)

Lewis, Timothy M. (Timothy Michael)

2014-01-01T23:59:59.000Z

356

A novel control design for a wave energy converter.  

E-Print Network (OSTI)

??Ocean wave energy is rapidly becoming a field of great interest in the world of renewable energy. Significant advancements in design and technology are being… (more)

Schacher, Alphonse A.

2007-01-01T23:59:59.000Z

357

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

358

Combined Heat and Power Plant Steam Turbine  

E-Print Network (OSTI)

Combined Heat and Power Plant Steam Turbine Steam Turbine Chiller Campus Heat Load Steam (recovered waste heat) Gas Turbine University Substation High Pressure Natural Gas Campus Electric Load Southern Generator Heat Recovery Alternative Uses: 1. Campus heating load 2. Steam turbine chiller to campus cooling

Rose, Michael R.

359

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

360

The Pacific Ocean’s Acidification Laboratory  

Science Journals Connector (OSTI)

The Pacific Ocean’s Acidification Laboratory ... Five years ago, at the quadrennial International Coral Reef Symposium in Okinawa, Japan, a poll of the scientists and resource managers present ranked ocean acidification 38th out of a list of 39 possible threats facing reefs, recalls Rusty Brainard, head of the National Oceanic and Atmospheric Administration’s (NOAA’s) Coral Reef Ecosystem Division. ... As the oceans absorb CO2 from the atmosphere at the rate of one million tons per hour, the pH of the water is changing. ...

Christopher Pala

2009-08-05T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

Coordinated formation pattern control of multiple marine surface vehicles with model uncertainty and time-varying ocean currents  

Science Journals Connector (OSTI)

This paper considers the coordinated formation pattern control of multiple marine surface vehicles in the presence of model uncertainty and time-varying ocean disturbances induced wind, waves and ocean currents. ...

Zhouhua Peng; Dan Wang; Hao Wang; Wei Wang

2014-12-01T23:59:59.000Z

362

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

363

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

364

Steam Path Audits on Industrial Steam Turbines  

E-Print Network (OSTI)

steam Path Audits on Industrial steam Turbines DOUGLAS R. MITCHELL. ENGINEER. ENCOTECH, INC., SCHENECTADY, NEW YORK ABSTRACT The electric utility industry has benefitted from steam path audits on steam turbines for several years. Benefits... not extend the turbine outage. To assure that all of the turbine audit data are available, the audit engineer must be at the turbine site the day the steam path is first exposed. A report of the opening audit findings is generated to describe the as...

Mitchell, D. R.

365

Turbine efficiency test on a large hydraulic turbine unit  

Science Journals Connector (OSTI)

The flow rate measurements are the most difficult part of efficiency tests on prototype hydraulic turbines. Among the numerous flow rate measurement methods ... the Winter Kennedy method is preferred for measurin...

ZongGuo Yan; LingJiu Zhou; ZhengWei Wang

2012-08-01T23:59:59.000Z

366

Interannual ENSO variability forced through coupled atmosphere-ocean feedback loops  

E-Print Network (OSTI)

, 2000; Power and Colman, 2006]. In this paper, we explore the extent to which baroclinic ocean Rossby1 Interannual ENSO variability forced through coupled atmosphere-ocean feedback loops Amy Solomon 1 feedback to, and significantly impact, the Tropics through ocean Rossby waves. We use an atmospheric

Solomon, Amy

367

NETL: Turbines - UTSR Projects  

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

2 An Experimental and Chemical Kinetics Study of the Combustion of Synga and High Hydrogen Content Fuels Penn State University & Princeton University 2 An Experimental and Chemical Kinetics Study of the Combustion of Synga and High Hydrogen Content Fuels Penn State University & Princeton University Robert Santoro (PSU), Fred Dryer (Princeton), & Yiguang Ju (Princeton) Project Dates: 10/1/2009 - 9/30/2012 Area of Research: Combusion Federal Project Manager: Mark Freeman Project Objective: To resolve the recently noted difficulties observed in the ability of existing elementary kinetic models to predict experimental ignition delay, burning rate, and homogenous chemical kinetic oxidation characteristics of hydrogen and hydrogen/carbon monoxide fuels with air and with air diluted with nitrogen and/or carbon dioxide at pressures and dilutions in the range of those contemplated for gas turbine applicaitons

368

NETL: Turbines - UTSR Projects  

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

1 Numerical and Experimental Study of Mixing Processes Associated with Hydrogen and High Hydrogen Content Fuels University of California -- Irvine 1 Numerical and Experimental Study of Mixing Processes Associated with Hydrogen and High Hydrogen Content Fuels University of California -- Irvine Vincent McDonell Project Dates: 10/1/2008 - 9/30/2010 Area of Research: Combusion Federal Project Manager: Mark Freeman Project Objective: The goal of this comprehensive research is to evaluate methods for characterizing fuel profiles of coal syngas and high hydrogen content (HHC) fuels and the level of mixing, and apply these methods to provide detailed fuel concentration profile data for various premixer system configurations relevant for turbine applications. The specific project objectives include: (1) Establish and apply reliable, accurate measurement methods to establish instantaneous and time averaged fuel

369

NETL: Turbines - UTSR Projects  

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

6 High Pressure Kinetics of Syngas and Nearly Pure Hydrogen Fuels Univ of Colorado 6 High Pressure Kinetics of Syngas and Nearly Pure Hydrogen Fuels Univ of Colorado John Daily Project Dates: 8/1/2007 - 9/30/2010 Area of Research: Combusion Federal Project Manager: Mark Freeman Project Objective: The goal of this project is to develop the necessary chemical kinetics information to understand the combustion of syngas and nearly pure hydrogen fuels at conditions of interest in gas turbine combustion. Objectves are to explore high-pressure kinetics by making detailed composition measurements of combustion intermediates and products in a flow reactor using molecular beam/mass spectrometry (MB/MS) and matrix isolation spectroscopy (MIS), to compare experimental data with calculations using existing mechanisms, and to use theoretical methods to

370

Sprayed skin turbine component  

DOE Patents (OSTI)

Fabricating a turbine component (50) by casting a core structure (30), forming an array of pits (24) in an outer surface (32) of the core structure, depositing a transient liquid phase (TLP) material (40) on the outer surface of the core structure, the TLP containing a melting-point depressant, depositing a skin (42) on the outer surface of the core structure over the TLP material, and heating the assembly, thus forming both a diffusion bond and a mechanical interlock between the skin and the core structure. The heating diffuses the melting-point depressant away from the interface. Subsurface cooling channels (35) may be formed by forming grooves (34) in the outer surface of the core structure, filling the grooves with a fugitive filler (36), depositing and bonding the skin (42), then removing the fugitive material.

Allen, David B

2013-06-04T23:59:59.000Z

371

Steam turbines of the Ural Turbine Works for advanced projects of combined-cycle plants  

Science Journals Connector (OSTI)

We describe the design features, basic thermal circuits, and efficiency of steam turbines developed on the basis of serially produced steam turbines of Ural Turbine Works and used as part of combined-cycle plants...

G. D. Barinberg; A. E. Valamin; A. Yu. Kultyshev

2009-09-01T23:59:59.000Z

372

Development of a low swirl injector concept for gas turbines  

E-Print Network (OSTI)

Injector Concept for Gas Turbines Robert K. Cheng * , Scottconcept for ultra- low NO x gas turbines. Low-swirl flamevirtually every industrial gas turbine manufacturer to meet

Cheng, R.K.; Fable, S.A.; Schmidt, D.; Arellano, L.; Smith, K.O.

2000-01-01T23:59:59.000Z

373

Turbine Aeration Physical Modeling and Software Design | Department...  

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

Turbine Aeration Physical Modeling and Software Design Turbine Aeration Physical Modeling and Software Design Turbine Aeration Physical Modeling and Software Design...

374

Impulse Turbine Efficiency Calculation Methods with Organic Rankine Cycle.  

E-Print Network (OSTI)

?? A turbine was investigated by various methods of calculating its efficiency. The project was based on an existing impulse turbine, a one-stage turbine set… (more)

Dahlqvist, Johan

2012-01-01T23:59:59.000Z

375

Turbine-Fact-Sheets | netl.doe.gov  

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

Ultra-High Temperature Thermal Barrier Coatings HiFunda, LLC Hydrogen Turbines SC0008218 Air-Riding Seal Technology for Advanced Gas Turbine Engines Florida Turbine Technologies...

376

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

377

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...

378

Seminario de Matemtica Aplicada "Renowable wave energy  

E-Print Network (OSTI)

Seminario de Matemática Aplicada "Renowable wave energy: potencial and technical challenges Abstract: Among the various renewable energy sources, ocean wave energy has been only recently investiga will be at first to introduce the potential of wave energy, as a significant, and often neglected, contributor

Tradacete, Pedro

379

Western Turbine | Open Energy Information  

Open Energy Info (EERE)

Turbine Turbine Jump to: navigation, search Name Western Turbine Place Aurora, Colorado Zip 80011 Sector Wind energy Product Wind Turbine Installation and Maintainance. Coordinates 39.325162°, -79.54975° 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":39.325162,"lon":-79.54975,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

380

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.

Note: This page contains sample records for the topic "turbines ocean waves" 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

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

382

High temperature turbine engine structure  

DOE Patents (OSTI)

A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.

Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)

1994-01-01T23:59:59.000Z

383

High temperature turbine engine structure  

DOE Patents (OSTI)

A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.

Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)

1993-01-01T23:59:59.000Z

384

High temperature turbine engine structure  

DOE Patents (OSTI)

A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.

Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)

1992-01-01T23:59:59.000Z

385

Rim seal for turbine wheel  

DOE Patents (OSTI)

A turbine wheel assembly includes a disk having a plurality of blades therearound. A ceramic ring is mounted to the housing of the turbine wheel assembly. A labyrinth rim seal mounted on the disk cooperates with the ceramic ring to seal the hot gases acting on the blades from the disk. The ceramic ring permits a tighter clearance between the labyrinth rim seal and the ceramic ring.

Glezer, Boris (Del Mar, CA); Boyd, Gary L. (Alpine, CA); Norton, Paul F. (San Diego, CA)

1996-01-01T23:59:59.000Z

386

3/5/2014 TinyMicro Wind Turbines Generate Electricity| New Energyand Fuel http://newenergyandfuel.com/http:/newenergyandfuel/com/2014/01/16/tiny-micro-wind-turbines-generate-electricity/ 1/12  

E-Print Network (OSTI)

Geothermal Heat Harvesting Hydro Power Generation Lighting Materials Money and Finance Ocean Tide & Current Coal Diesel Gasoline Natural Gas #1 Stock to Buy Right Now Top-Rated Generator Pros Wind Turbine Tech Classes Tri-Fuel Generators 10KW Generator- $939 www.generatordepot... Portable, Elec. Start, Warranty All-Power

Chiao, Jung-Chih

387

MHK Technologies/OCGen turbine generator unit TGU | Open Energy Information  

Open Energy Info (EERE)

OCGen turbine generator unit TGU OCGen turbine generator unit TGU < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage OCGen turbine generator unit TGU.jpg Technology Profile Primary Organization Ocean Renewable Power Company Project(s) where this technology is utilized *MHK Projects/Cook Inlet Tidal Energy *MHK Projects/East Foreland Tidal Energy *MHK Projects/Lubec Narrows Tidal *MHK Projects/Nenana Rivgen *MHK Projects/Treat Island Tidal *MHK Projects/Western Passage OCGen Technology Resource Click here Current/Tidal Technology Type Click here Cross Flow Turbine Technology Readiness Level Click here TRL 4: Proof of Concept Technology Description he OCGen turbine-generator unit (TGU) is unidirectional regardless of current flow direction. Two cross flow turbines drive a permanent magnet generator on a single shaft. OCGen modules contain the ballast/buoyancy tanks and power electronics/control system allowing for easier installation. The OCGen TGU can be stacked either horizontally or vertically to form arrays.

388

1 - Introduction to gas turbines  

Science Journals Connector (OSTI)

Abstract: This chapter provides an overview of the importance of gas turbines for the power generation and oil and gas sector and – in less detail – the aviation sector. Worldwide trends in power generation and electricity conversion processes and the role of gas turbines to minimise CO2 emissions are addressed. Gas turbines are essential and crucial to reduce emissions both in aviation and in power production. Technologies for improving gas turbine and system efficiency, through higher turbine inlet temperatures, improved materials, cooling methods and thermal barrier coatings are described. New thermodynamic approaches, including intercooling, water and steam injection and hybrid cycles are addressed. Major issues are also fuel and operational flexibility, reliability and availability, cost reduction and power density, especially for the offshore sector. Market trends have been sketched. In the coming decades, gas turbines will be one of the major technologies for CO2 emission reductions in the power generation, aviation, oil and gas exploration and transport sectors. This prognosis is based on their high current efficiency and further efficiency improvement potential, both for simple cycle as for combined-cycle applications.

A.J.A. Mom

2013-01-01T23:59:59.000Z

389

Industrial Gas Turbines | Department of Energy  

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

Industrial Gas Turbines Industrial Gas Turbines Industrial Gas Turbines November 1, 2013 - 11:40am Addthis A gas turbine is a heat engine that uses high-temperature, high-pressure gas as the working fluid. Part of the heat supplied by the gas is converted directly into mechanical work. High-temperature, high-pressure gas rushes out of the combustor and pushes against the turbine blades, causing them to rotate. In most cases, hot gas is produced by burning a fuel in air. This is why gas turbines are often referred to as "combustion" turbines. Because gas turbines are compact, lightweight, quick-starting, and simple to operate, they are used widely in industry, universities and colleges, hospitals, and commercial buildings. Simple-cycle gas turbines convert a portion of input energy from the fuel

390

Industrial Gas Turbines | Department of Energy  

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

Industrial Gas Turbines Industrial Gas Turbines Industrial Gas Turbines November 1, 2013 - 11:40am Addthis A gas turbine is a heat engine that uses high-temperature, high-pressure gas as the working fluid. Part of the heat supplied by the gas is converted directly into mechanical work. High-temperature, high-pressure gas rushes out of the combustor and pushes against the turbine blades, causing them to rotate. In most cases, hot gas is produced by burning a fuel in air. This is why gas turbines are often referred to as "combustion" turbines. Because gas turbines are compact, lightweight, quick-starting, and simple to operate, they are used widely in industry, universities and colleges, hospitals, and commercial buildings. Simple-cycle gas turbines convert a portion of input energy from the fuel

391

Acoustic emission monitoring of steam turbines. Final report  

SciTech Connect

Experience over several years with on-line monitoring of steam turbines, supported by relevant laboratory studies, has led to a clearer understanding of the conditions under which acoustic emission (AE) due to turbine shaft cracking can be detected. To overcome problems associated with the noisy environment, efforts have been directed at improving the AE signal discrimination capabilities of the monitoring electronics. These efforts have been guided by extensive measurements of the amplitude, frequency and time dependence of normal turbine noises in a variety of operating conditions. Similar measurements have been made in the laboratory to determine the characteristics of AE due to crack growth in rotor steels with several loading conditions and temperatures. Along with determinations of the attenuation and wave propagation characteristics of simulated AE in the rotor shafts, these measurements have permitted estimates of the detectability of AE due to crack growth under various conditions, should it occur. An essential part of the proposed monitoring will be determining the source locations and characteristics of ''normal'' operating noise and developing time histories of these sources so that when ''abnormal'' crack growth AE occurs, it will be recognized. The time histories of the ''normal'' operating noises may also reveal other potentially damaging conditions such as lubricating oil contamination, bearing wear, out-of-balance condition, loose turbine disks, blade cracking or rubbing and impingement of exfoliation particles or water droplets, each of which is known or expected to have a characteristic acoustic signature. 17 refs., 23 figs., 8 tabs.

Randall, R.L.; Hong, C.; Graham, L.J.

1986-02-01T23:59:59.000Z

392

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

393

GFD-2 Spring 2004 Syllabus Text: a nearly complete set of text handouts, plus A.E.Gill, Atmosphere-Ocean Dynamics  

E-Print Network (OSTI)

geography of potential vorticity -lateral circulation: wind-driven ocean gyres and boundary currents -circumpolar ocean currents and the atmospheric westerly winds: stationary Rossby waves with mountains; waveGFD-2 Spring 2004 Syllabus Text: a nearly complete set of text handouts, plus A.E.Gill, Atmosphere-Ocean

394

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

395

Causes of ocean currents  

Science Journals Connector (OSTI)

In the foregoing analysis of the ocean and the atmosphere as two interacting subsystems, we have identified two major energy inputs into the ocean. These are the wind stress over the sea surface and heat fluxe...

David Tolmazin

1985-01-01T23:59:59.000Z

396

Deepwater Internal Wave Study and Application  

E-Print Network (OSTI)

and ocean currents. Although their effects on floating drilling platforms and their riser systems have not been extensively studied, in the past these waves have seriously disrupted offshore exploration and drilling operations. In particular, a drill pipe...

Jiang, Lei

2013-12-10T23:59:59.000Z

397

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

398

Simulating Collisions for Hydrokinetic Turbines  

SciTech Connect

Evaluations of blade-strike on an axial-flow Marine Hydrokinetic turbine were conducted using a conventional methodology as well as an alternative modeling approach proposed in the present document. The proposed methodology integrates the following components into a Computa- tional Fluid Dynamics (CFD) model: (i) advanced eddy-resolving flow simulations, (ii) ambient turbulence based on field data, (iii) moving turbine blades in highly transient flows, and (iv) Lagrangian particles to mimic the potential fish pathways. The sensitivity of blade-strike prob- ability to the following conditions was also evaluated: (i) to the turbulent environment, (ii) to fish size and (iii) to mean stream flow velocity. The proposed methodology provided fraction of collisions and offered the capability of analyzing the causal relationships between the flow envi- ronment and resulting strikes on rotating blades. Overall, the conventional methodology largely overestimates the probability of strike, and lacks the ability to produce potential fish and aquatic biota trajectories as they interact with the rotating turbine. By using a set of experimental corre- lations of exposure-response of living fish colliding on moving blades, the occurrence, frequency and intensity of the particle collisions was next used to calculate the survival rate of fish crossing the MHK turbine. This step indicated survival rates always greater than 98%. Although the proposed CFD framework is computationally more expensive, it provides the advantage of evaluating multiple mechanisms of stress and injury of hydrokinetic turbine devices on fish.

Richmond, Marshall C.; Romero Gomez, Pedro DJ; Rakowski, Cynthia L.

2013-10-01T23:59:59.000Z

399

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

400

Turbine-Turbine Interaction and Performance Detailed (Fact Sheet), NREL Highlights, Science  

SciTech Connect

Next-generation modeling capability assesses wind turbine array fluid dynamics and aero-elastic simulations.

Not Available

2011-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

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"

402

Radial-Radial Single Rotor Turbine  

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

Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine A rotor for use in turbine applications. Available for thumbnail of Feynman Center (505) 665-9090 Email Radial-Radial Single Rotor Turbine A rotor for use in turbine applications has a radial compressor/pump having radially disposed spaced apart fins forming passages and a radial turbine having hollow turbine blades interleaved with the fins and through which fluid from the radial compressor/pump flows. The rotor can, in some applications, be used to produce electrical power. U.S. Patent No.: 7,044,718 (DOE S-100,626) Patent Application Filing Date: July 8, 2003 Patent Issue Date: May 16, 2006 Licensing Status: Available for Express Licensing (?). View terms and a sample license agreement.

403

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....

404

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

405

Golden Turbines LLC | Open Energy Information  

Open Energy Info (EERE)

Axis Logarithmic Spiral Turbine This article is a stub. You can help OpenEI by expanding it. Retrieved from "http:en.openei.orgwindex.php?titleGoldenTurbinesLLC&oldid76910...

406

Theory and Performance of Tesla Turbines  

E-Print Network (OSTI)

gas turbines for combined heat and power”. In: Ap- plied10.1115/1.4001356. [3] Combined Heat and Power. Tech. rep.of Tesla Turbines for Combined Heat and Power Applications”.

Romanin, Vincent D.

2012-01-01T23:59:59.000Z

407

Consider Steam Turbine Drives for Rotating Equipment  

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

This tip sheet outlines the benefits of steam turbine drives for rotating equipment as part of optimized steam systems.

408

Electrical Cost Reduction Via Steam Turbine Cogeneration  

E-Print Network (OSTI)

ELECTRICAL COST REDUCTION VIA STEAM TURBINE COGENERATION LYNN B. DI TULLIO, P.E. Project Engineer Ewing Power Systems, Inc. South Deerfield, Mass. ABSTRACT Steam turbine cogeneration is a well established technology which is widely used... mature technology. Steam turbines and engines have been used by industry to cogen erate power since before there were electric utilities. While the technology for turbines, generators and controls has continued to develop there is very little about...

Ewing, T. S.; Di Tullio, L. B.

409

Speaker: Professor Alexander Turbiner, Instituto de Ciencias ...  

E-Print Network (OSTI)

Oct 27, 2009 ... PURDUE UNIVERSITY. Department of Mathematics Colloquium. Speaker: Professor Alexander Turbiner, Instituto de Ciencias Nucleares, ...

1910-91-01T23:59:59.000Z

410

Ocean Sci., 3, 337344, 2007 www.ocean-sci.net/3/337/2007/  

E-Print Network (OSTI)

-East Atlantic Ocean are all dominated by the semidiurnal lunar (M2) tide. It is shown that motions at M2 vary divergence and focusing of internal wave rays to the removal of the in- ternal tidal energy by non, 1972). Recent studies on tidal motions focus on the dissipation of lunar (M) gravitational energy

Boyer, Edmond

411

TGM Turbines | Open Energy Information  

Open Energy Info (EERE)

TGM Turbines TGM Turbines Jump to: navigation, search Name TGM Turbines Place Sertaozinho, Sao Paulo, Brazil Zip 14175-000 Sector Biomass Product Brazil based company who constructs and sells boilers for biomass plants. Coordinates -21.14043°, -48.005154° 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":-21.14043,"lon":-48.005154,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

412

Creation of nonlinear density gradients for use in internal wave research  

E-Print Network (OSTI)

A method was developed to create a nonlinear density gradient in a tank of water. Such gradients are useful for studying internal waves, an ocean phenomenon that plays an important role in climate and ocean circulation. ...

Harris, Victoria Siân

2007-01-01T23:59:59.000Z

413

TIP DESENSITIZATION OF AN AXIAL TURBINE ROTOR  

E-Print Network (OSTI)

flow causes total pressure loss and significantly reduces turbine stage efficiency. Tip leakage relatedCC-63 TIP DESENSITIZATION OF AN AXIAL TURBINE ROTOR USING PARTIAL SQUEALER RIMS Debashis Dey1 of full and partial-length squealer rims in a turbine stage. Full and partial-length squealer rims

Camci, Cengiz

414

Generating Resources Combined Cycle Combustion Turbine  

E-Print Network (OSTI)

turbine (s) Heat recovery steam generator (s) - HRSG with or without duct firing Natural gas supply11/17/2014 1 Generating Resources Combined Cycle Combustion Turbine Utility Scale Solar PV Steven doing recently around two key supply-side resource technologies 1. Combined Cycle Combustion Turbine

415

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

416

Aircraft Gas Turbine Materials and Processes  

Science Journals Connector (OSTI)

...extend the life of a gas turbine air-foil...withstood higher turbine inlet tem-peratures...invented for the gas-pressure...from over. Remaining to be formu-lated...in rupture life. In addition...fabrication of gas turbine components...

B. H. Kear; E. R. Thompson

1980-05-23T23:59:59.000Z

417

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.

418

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

419

Wave Energy Basics | Department of Energy  

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

Wave Energy Basics Wave Energy Basics Wave Energy Basics August 16, 2013 - 4:30pm Addthis Photo of a large wave. Wave energy technologies extract energy directly from surface waves or from pressure fluctuations below the surface. Renewable energy analysts believe there is enough energy in ocean waves to provide up to 2 terawatts of electricity. (A terawatt is equal to a trillion watts.) However, wave energy cannot be harnessed everywhere. Wave power-rich areas of the world include the western coasts of Scotland, northern Canada, southern Africa, and Australia as well as the northeastern and northwestern coasts of the United States. In the Pacific Northwest alone, it is feasible that wave energy could produce 40-70 kilowatts (kW) per 3.3 feet (1 meter) of western coastline. Wave Energy Technologies

420

Ocean | Data.gov  

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

Ocean Ocean Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean Welcome to our COMMUNITY This is the National Ocean Council's portal for data, information, and decision tools to support people engaged in regional marine planning for the future use of the ocean, our coasts, and the Great Lakes. Our goal is to enhance discovery of and access to data and information for planners, stakeholders, and the public. Please visit our Feedback page to tell us what would make the site most useful to you as we expand our content. Start Here! Previous Pause Next PacIOOS - Pacific Islands Voyager PacIOOS - Pacific Islands Voyager View More West Coast Governors Alliance - Regional Data Framework West Coast Governors Alliance - Regional Data Framework View More Mid-Atlantic Ocean Data Portal

Note: This page contains sample records for the topic "turbines ocean waves" 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

Harvesting Broadband Kinetic Impact Energy from Mechanical Triggering/Vibration and Water Waves  

Science Journals Connector (OSTI)

(13) Although efforts in utilizing ocean wave energy could be dated back to 1890,(13) there has not been any commercial wave power farms up to now. ... This demonstrates that in addition to water wave energy harvesting our TENG also has the potential for hydrological analysis, which is a very important function for a wave energy farming system. ... Last but not least, the major component for ocean wave harvesting is the offshore wind power. ...

Xiaonan Wen; Weiqing Yang; Qingshen Jing; Zhong Lin Wang

2014-06-25T23:59:59.000Z

422

The value of steam turbine upgrades  

SciTech Connect

Technological advances in mechanical and aerodynamic design of the turbine steam path are resulting in higher reliability and efficiency. A recent study conducted on a 390 MW pulverized coal-fired unit revealed just how much these new technological advancements can improve efficiency and output. The empirical study showed that the turbine upgrade raised high pressure (HP) turbine efficiency by 5%, intermediate pressure (IP) turbine efficiency by 4%, and low pressure (LP) turbine efficiency by 2.5%. In addition, the unit's highest achievable gross generation increased from 360 MW to 371 MW. 3 figs.

Potter, K.; Olear, D.; [General Physics Corp. (United States)

2005-11-01T23:59:59.000Z

423

AWS Ocean Energy Ltd | Open Energy Information  

Open Energy Info (EERE)

AWS Ocean Energy Ltd AWS Ocean Energy Ltd Jump to: navigation, search Name AWS Ocean Energy Ltd Place Inverness, Scotland, United Kingdom Zip IV17 1SN Product Inverness-based company established to commercialise the Archimedes Wave Swing. Coordinates 48.55324°, -110.689764° 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":48.55324,"lon":-110.689764,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

424

ocean energy | OpenEI Community  

Open Energy Info (EERE)

ocean energy ocean energy Home Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 MHK Cost Breakdown Structure Draft CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.Upload

425

Methods for measuring turbine efficiency  

SciTech Connect

This article describes the most common methods used for measuring hydro turbine efficiency. These methods are the acoustic flowmeter method, the Gibson (pressure-time) method, pressure drop across a flow restriction, propeller-driven flowmeters, the volumetric method, Winter-Kennedy taps, and the thermodynamic method. A new computerized variation of the Gibson method is also described.

O'Kelly, F.

1992-04-01T23:59:59.000Z

426

High temperature turbine engine structure  

DOE Patents (OSTI)

A high temperature turbine engine includes a rotor portion having axially stacked adjacent ceramic rotor parts. A ceramic/ceramic joint structure transmits torque between the rotor parts while maintaining coaxial alignment and axially spaced mutually parallel relation thereof despite thermal and centrifugal cycling.

Boyd, Gary L. (Tempe, AZ)

1991-01-01T23:59:59.000Z

427

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.

428

Industrial Advanced Turbine Systems Program overview  

SciTech Connect

The U.S. Department of Energy (DOE), in partnership with industry, has set new performance standards for industrial gas turbines through the creation of the Industrial Advanced Turbine System Program. Their leadership will lead to the development of an optimized, energy efficient, and environmentally friendly gas turbine power systems in this size class (3-to-20 MW). The DOE has already created a positive effect by encouraging gas turbine system manufacturers to reassess their product and technology plans using the new higher standards as the benchmark. Solar Turbines has been a leader in the industrial gas turbine business, and is delighted to have joined with the DOE in developing the goals and vision for this program. We welcome the opportunity to help the national goals of energy conservation and environmental enhancement. The results of this program should lead to the U.S. based gas turbine industry maintaining its international leadership and the creation of highly paid domestic jobs.

Esbeck, D.W. [Solar Turbines Inc., San Diego, CA (United States)

1995-10-01T23:59:59.000Z

429

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

430

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.

431

19 - Sensing solutions for assessing and monitoring wind turbines  

Science Journals Connector (OSTI)

Abstract: This chapter focuses on structural health monitoring (SHM) for wind turbines. Repair and downtime costs can potentially be reduced with the continuous monitoring of structure and environment. Available SHM approaches for rotor blades and support structure are presented extensively, with a special focus on the sensor technology and the methods used. Important monitoring methods, such as modal-based methods, acoustic emission, and ultrasound wave propagation are presented. For monitoring of support structures, different foundation concepts are introduced with specific neuralgic spots. Subsequently, some of the global and local SHM approaches, as well as case studies are presented.

R. Rolfes; S. Tsiapoki; M.W. Häckell

2014-01-01T23:59:59.000Z

432

Ocean Energy: Forms and Prospects  

Science Journals Connector (OSTI)

...be relatively simple-turbines, paddle wheels, and...others. For example, if wind is forced to move through...and to interact with turbines of much re-duced dimensions...anhydrous ammonia) for turbine operation is the common...Systems envisaged are huge offshore floating or near-surface...

John D. Isaacs; Walter R. Schmitt

1980-01-18T23:59:59.000Z

433

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network (OSTI)

Ocean Thermal Energy Conversion (OTEC) Draft Programmaticof ocean thermal energy conversion technology. U.S. Depart~on Ocean TherUial Energy Conversion, June 18, 1979. Ocean

Sands, M.Dale

2013-01-01T23:59:59.000Z

434

Author's personal copy Wave energy resources along the Hawaiian Island chain  

E-Print Network (OSTI)

Author's personal copy Wave energy resources along the Hawaiian Island chain Justin E. Stopa model Wave atlas Wave energy Wave power a b s t r a c t Hawaii's access to the ocean and remoteness from demand for sustainable energy. The wave resources include swells from distant storms and year-round seas

435

Direct Drive Wave Energy Buoy  

SciTech Connect

The most prudent path to a full-scale design, build and deployment of a wave energy conversion (WEC) system involves establishment of validated numerical models using physical experiments in a methodical scaling program. This Project provides essential additional rounds of wave tank testing at 1:33 scale and ocean/bay testing at a 1:7 scale, necessary to validate numerical modeling that is essential to a utility-scale WEC design and associated certification.

Rhinefrank, Kenneth E. [Columbia Power Technologies, Inc.; Lenee-Bluhm, Pukha [Columbia Power Technologies, Inc.; Prudell, Joseph H. [Columbia Power Technologies, Inc.; Schacher, Alphonse A. [Columbia Power Technologies, Inc.; Hammagren, Erik J. [Columbia Power Technologies, Inc.; Zhang, Zhe [Columbia Power Technologies, Inc.

2013-07-29T23:59:59.000Z

436

Hydrodynamic principles of wave power extraction  

Science Journals Connector (OSTI)

...Despite the abundance of wave power in the sea, technologies...extraction share with offshore wind power at least two similar challenges...present, the estimated power-generating capacity of...20-40 buoys to match a wind turbine of 2MW capacity...

2012-01-01T23:59:59.000Z

437

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

438

Finavera Renewables Ocean Energy Ltd | Open Energy Information  

Open Energy Info (EERE)

Renewables Ocean Energy Ltd Renewables Ocean Energy Ltd Jump to: navigation, search Name Finavera Renewables Ocean Energy Ltd Address 595 Burrard Street Suite 3113 Three Bentall Centre PO Box 49071 Place Vancouver Zip V7X 1G4 Sector Marine and Hydrokinetic Phone number 604-288-9051 Website http://www.finavera.com Region Canada LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: Coos County Offshore Wave Energy Power Plant Figueira da Foz Portugal Humboldt County Wave Project Makah Bay Offshore Wave Pilot Project South Africa Ucluelet BC Canada This company is involved in the following MHK Technologies: AquaBuoy This article is a stub. You can help OpenEI by expanding it.

439

Energy Department Announces $10 million for Wave Energy Demonstration at Navy’s Hawaii Test Site  

Office of Energy Efficiency and Renewable Energy (EERE)

The Energy Department today announced $10 million to test prototypes designed to generate clean, renewable electricity from ocean waves and help diversify America’s energy portfolio.

440

E-Print Network 3.0 - acoustic wave theory Sample Search Results  

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

shallow water internal waves on acoustic... - and strong-scattering theories for random media would ... Source: Oregon State University, College of Oceanic and Atmospheric...

Note: This page contains sample records for the topic "turbines ocean waves" 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

1 - An Overview of Gas Turbines  

Science Journals Connector (OSTI)

Publisher Summary The gas turbine is a power plant that produces a great amount of energy depending on its size and weight. The gas turbine has found increasing service in the past 60 years in the power industry among both utilities and merchant plants as well as the petrochemical industry throughout the world. The utilization of gas turbine exhaust gases, for steam generation or the heating of other heat transfer mediums, or the use of cooling or heating buildings or parts of cities is not a new concept and is currently being exploited to its full potential. The aerospace engines have been leaders in most of the technology in the gas turbine. The design criteria for these engines were high reliability, high performance, with many starts and flexible operation throughout the flight envelope. The industrial gas turbine has always emphasized long life and this conservative approach has resulted in the industrial gas turbine in many aspects giving up high performance for rugged operation. The gas turbine produces various pollutants in the combustion of the gases in the combustor. These include smoke, unburnt hydrocarbons, carbon monoxide, carbon dioxide, and oxides of nitrogen. The gas turbine is a power plant that produces a great amount of energy depending on its size and weight. It has found increasing service in the past 60 years in the power industry among both utilities and merchant plants, as well as in the petrochemical industry. Its compactness, low weight and multiple fuel application make it a natural power plant for offshore platforms. Today there are gas turbines that run on natural gas, diesel fuel, naphtha, methane, crude, low-BTU gases, vaporized fuel oils and biomass gases. The last 20 years have seen a large growth in gas turbine technology, spearheaded by the growth in materials technology, new coatings, new cooling schemes and combined cycle power plants. This chapter presents an overview of the development of modern gas turbines and gas turbine design considerations. The six categories of simple-cycle gas turbines (frame type heavy-duty; aircraft-derivative; industrial-type; small; vehicular; and micro) are described. The major gas turbine components (compressors; regenerators/recuperators; fuel type; and combustors) are outlined. A gas turbine produces various pollutants in the combustion of the gases in the combustor and the potential environmental impact of gas turbines is considered. The two different types of combustor (diffusion; dry low NOx, (DLN) or dry low emission (DLE)), the different methods to arrange combustors on a gas turbine, and axial-flow and radial-inflow turbines are described. Developments in materials and coatings are outlined.

Meherwan P. Boyce

2012-01-01T23:59:59.000Z

442

NREL: Energy Analysis - Ocean Energy Results - Life Cycle Assessment  

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

Ocean Energy Results - Life Cycle Assessment Review Ocean Energy Results - Life Cycle Assessment Review For more information, visit: Special Report on Renewable Energy Sources and Climate Change Mitigation: Ocean Energy OpenEI: Data, Visualization, and Bibliographies Chart that shows life cycle greenhouse gas emissions for ocean power technologies. For help reading this chart, please contact the webmaster. Estimates of life cycle greenhouse gas emissions of wave and tidal range technologies. Credit: Lewis, A., S. Estefen, J. Huckerby, W. Musial, T. Pontes, J. Torres-Martinez, 2011: Ocean Energy. In IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation [O. Edenhofer, R. Pichs-Madruga, Y. Sokona, K. Seyboth, P. Matschoss, S. Kadner, T. Zwickel, P. Eickemeier, G. Hansen, S. Schlömer, C. von Stechow (eds)], Cambridge University Press. Figure 6.11 Enlarge image

443

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.

444

Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code  

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

Investigating the Influence of Investigating the Influence of the Added Mass Effect to Marine Hydrokinetic Horizontal-Axis Turbines Using a General Dynamic Wake Wind Turbine Code D.C. Maniaci Pennsylvania State University Y. Li National Renewable Energy Laboratory Presented at the Oceans 11 Conference Kona, Hawaii September 19-21, 2011 Conference Paper NREL/CP-5000-52306 October 2011 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.

445

E-Print Network 3.0 - axoplasmic pressure waves Sample Search...  

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

obtained in the wave rotor. This is in contrast to the untopped engine, where the turbine inlet pressure... of the topped engine is higher than that of the ... Source: Akbari,...

446

How ocean currents are studied  

Science Journals Connector (OSTI)

How infinite and boundless the ocean must have seemed to the first man to set foot upon its shore. Kind or stern, shallow or steep, the ocean’s shores have always held a peculiar fascination for man. The moist...

David Tolmazin

1985-01-01T23:59:59.000Z

447

Definition: Turbine | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Jump to: navigation, search Dictionary.png Turbine A device or machine that converts the kinetic energy of a fluid (air, water, steam or other gases) to mechanical energy.[1][2] View on Wikipedia Wikipedia Definition Related Terms Electric generator, Electricity, Electricity generation, energy, bioenergy References ↑ http://205.254.135.24/tools/glossary/index.cfm?id=T ↑ http://www1.eere.energy.gov/site_administration/glossary.html Retriev LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ed from "http://en.openei.org/w/index.php?title=Definition:Turbine&oldid=493149" Category: Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load)

448

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

449

Fuel option for gas turbine  

SciTech Connect

Growth in electricity demand is an average of 10% per year. Energy, emission, and economy are importance of critical concerns for generating systems. Therefore, combined cycle power plant is preferred to Electricity Generating Authority of Thailand (EGAT) new power generating capacity. The various option of available fuel for gas turbine are natural gas, liquid fuel and coal fuel. Particularly with the tremendous price increases in imported and domestic fuel supplies, natural gas is an attractive low cost alternative for power generation. EGAT has researched using heavy fuel instead of natural gas since the year 1991. The problems of various corrosion characteristics have been found. In addition, fuel treatment for gas turbine are needed, and along with it, the environmental consideration are options that provide the limitation of environmental regulation.

Tantayakom, S. [Electricity Generating Authority of Thailand, Nonthaburi (Thailand). Chemical and Analysis Dept.

1995-12-31T23:59:59.000Z

450

Final Turbine and Test Facility Design Report Alden/NREC Fish Friendly Turbine  

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

The final report provides an overview of the Alden/NREC Fish Friendly turbine design phase, turbine test plan, preliminary test results, costs, schedule, and a hypothetical application at a real world project.

451

Modular Turbine Control Software: A Control Software Architecture for the ABB Gas Turbine Family  

Science Journals Connector (OSTI)

ABB Power Generation’s family of gas turbines covers the power range of 35 to 270 MW with five basic turbine types, which vary in size, combustion technology and equipment. Each type comes in several variatons...

Dr. Christopher Ganz; Michael Layes

1998-01-01T23:59:59.000Z

452

Steam Turbine Materials and Corrosion  

SciTech Connect

Ultra-supercritical (USC) power plants offer the promise of higher efficiencies and lower emissions. Current goals of the U.S. Department of Energy’s Advanced Power Systems Initiatives include coal generation at 60% efficiency, which would require steam temperatures of up to 760 °C. In prior years this project examined the steamside oxidation of alloys for use in high- and intermediate-pressure USC turbines. This steamside oxidation research is continuing and progress is presented, with emphasis on chromia evaporation.

Holcomb, G.H.; Hsu, D.H.

2008-07-01T23:59:59.000Z

453

Optomechanical Conversion by Mechanical Turbines  

Science Journals Connector (OSTI)

Liquid-crystal elastomers are rubbers with liquid-crystal order. They contract along their nematic director when heated or illuminated. The shape changes are large and occur in a relatively narrow temperature interval or at low illumination around the nematic-isotropic transition. We present a conceptual design of a mechanical, turbine-based engine using photoactive liquid-crystal elastomers to extract mechanical work from light. Its efficiency is estimated to be 40%.

Miloš Kneževi? and Mark Warner

2014-10-30T23:59:59.000Z

454

Optomechanical conversion by mechanical turbines  

E-Print Network (OSTI)

Liquid crystal elastomers are rubbers with liquid crystal order. They contract along their nematic director when heated or illuminated. The shape changes are large and occur in a relatively narrow temperature interval, or at low illumination, around the nematic-isotropic transition. We present a conceptual design of a mechanical, turbine-based engine using photo-active liquid crystal elastomers to extract mechanical work from light. Its efficiency is estimated to be 40%.

Milos Knezevic; Mark Warner

2014-11-02T23:59:59.000Z

455

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

456

Steam Turbine Control Valve Noise  

Science Journals Connector (OSTI)

Although noise problems with steam turbine control valves have existed before they have become more prominent with nuclear turbines whose valves range to 20 in. in diameter. Our first?generation nuclear control valves were unacceptably noisy when operating under chocked conditions. These noise levels have been ameliorated by incorporation of a valve cage with numerous small holes. Rational design rules for this “dispersive muffler” have been developed from published multiple?jet noise data and improved through our own tests. However we are also evaluating other low?noise valve configurations which are consistent with turbine requirements. The approach we are developing is to investigate the internal aerodynamic noisegeneration in small air model tests and to combine this with measurements of pipe?wall transmission characteristics (being reported separately) to predict externally radiated noise. These predictions will be checked in a new steam test facility for complete scale?model valves. The small air tests show that acoustic efficiencies of throttling valve flows tend to vary with third power of Mach number when exhausting into space and with a lesser power when enclosed in a downstream pipe. At some pressure ratios narrow?band spikes appear in the spectrum and for some configurations step changes in sound power are associated with transitions in flow regimes.

Frank J. Heymann; Michael A. Staiano

1973-01-01T23:59:59.000Z

457

High Temperature Capabililty and Innovative Cooling with a Spar and Shell Turbine Blade - Florida Turbine Technologies  

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

Temperature Capability and Temperature Capability and Innovative Cooling with a Spar and Shell Turbine Blade-Florida Turbine Technologies Background Florida Turbine Technologies, Inc. (FTT) is currently developing advanced aerothermal technologies centered on spar and shell airfoil concepts meant to provide highly durable turbine components that require the lowest cooling flow possible. The spar-shell system represents a unique opportunity for the use of advanced, high-temperature materials

458

Cooled turbine blades in the GTÉ-65 gas turbine power unit  

Science Journals Connector (OSTI)

Experience with the development, study, and manufacturing of cooled blades for the GTÉ-65 high temperature gas turbine is described.

V. V. Rtishchev; V. V. Krivonosova; Yu. M. Sundukov…

2009-11-01T23:59:59.000Z

459

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

460

Ocean General Circulation Models  

SciTech Connect

1. Definition of Subject The purpose of this text is to provide an introduction to aspects of oceanic general circulation models (OGCMs), an important component of Climate System or Earth System Model (ESM). The role of the ocean in ESMs is described in Chapter XX (EDITOR: PLEASE FIND THE COUPLED CLIMATE or EARTH SYSTEM MODELING CHAPTERS). The emerging need for understanding the Earth’s climate system and especially projecting its future evolution has encouraged scientists to explore the dynamical, physical, and biogeochemical processes in the ocean. Understanding the role of these processes in the climate system is an interesting and challenging scientific subject. For example, a research question how much extra heat or CO2 generated by anthropogenic activities can be stored in the deep ocean is not only scientifically interesting but also important in projecting future climate of the earth. Thus, OGCMs have been developed and applied to investigate the various oceanic processes and their role in the climate system.

Yoon, Jin-Ho; Ma, Po-Lun

2012-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

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

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

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

462

E-Print Network 3.0 - aircraft gas turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft gas turbines...

463

E-Print Network 3.0 - advanced gas turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced gas turbines...

464

E-Print Network 3.0 - aviation gas turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: aviation gas turbines...

465

E-Print Network 3.0 - axial flow turbines Sample Search Results  

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

turbines Search Powered by Explorit Topic List Advanced Search Sample search results for: axial flow turbines...

466

E-Print Network 3.0 - axial flow turbine Sample Search Results  

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

turbine Search Powered by Explorit Topic List Advanced Search Sample search results for: axial flow turbine...

467

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

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

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

468

A Portable Expert System for Gas Turbine Maintenance  

E-Print Network (OSTI)

Combustion turbines for electric power generation and industrial applications have steadily increased in size, efficiency and prominence. The newest class of gas turbine-generators coming into service will deliver 150 megawatts, with turbine inlet...

Quentin, G. H.

469

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...

470

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

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

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

471

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

472

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

473

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

474

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,...

475

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

476

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...

477

Automatic Detection of Wind Turbine Clutter for Weather Radars  

Science Journals Connector (OSTI)

Wind turbines cause contamination of weather radar signals that is often detrimental and difficult to distinguish from cloud returns. Because the turbines are always at the same location, it would seem simple to identify where wind turbine ...

Kenta Hood; Sebastián Torres; Robert Palmer

2010-11-01T23:59:59.000Z

478

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

479

SIMPLIFIED MODEL OF THE AIR FLOW ABOVE WAVES  

E-Print Network (OSTI)

SIMPLIFIED MODEL OF THE AIR FLOW ABOVE WAVES V.N. Kudryavtsev Marine Hydrophysical Institute influenced by the air flow dynamics over the water waves. The exchange of momentum, heat, moisture and gases between the atmosphere and the ocean is determined to a large extent by the wind-wave interaction

Haak, Hein

480

Experimental investigation of small-scale breaking waves : flow visualization across the air-water interface  

E-Print Network (OSTI)

The dynamics of breaking waves significantly affect air-sea fluxes of heat, momentum, mass and energy across the ocean interface. Breaking waves also contribute considerable loading to offshore and coastal structures, and ...

McDonald, Angus Kai

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "turbines ocean waves" 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

Navier-Stokes simulations of steep breaking water waves with a coupled air-water interface  

E-Print Network (OSTI)

Wave breaking on the ocean surface significantly facilitates the transfer of mass, momentum, heat and energy across the air-sea interface. In the context of the near field flow about a surface ship, the breaking bow wave ...

Hendrickson, Kelli L

2005-01-01T23:59:59.000Z

482

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

483

Turbine bucket natural frequency tuning rib  

DOE Patents (OSTI)

A tuning rib is added preferably in the aft cavity of a cored turbine bucket to alter the bucket's natural frequencies. The tuning rib may be a solid rib or a segmented rib and is particularly suited for altering high order frequency modes such as 2T, 4F and 1-3S. As such, detrimental crossings of natural bucket frequencies and gas turbine stimuli can be avoided to thereby improve the reliability of a gas turbine without impacting other features of the bucket that are important to the performance of the gas turbine.

Wang, John Zhiqiang (Greenville, SC); Norton, Paul Francis (Greenville, SC); Barb, Kevin Joseph (Halfmoon, NY); Jacala, Ariel Caesar-Prepena (Simpsonville, SC)

2002-01-01T23:59:59.000Z

484

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...

485

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...

486

Steam turbine upgrades: A utility based approach  

SciTech Connect

In the increasingly competitive power generation markets utilities must strive towards lower electricity generation costs, whilst relying on an aging steam turbine fleet. By the year 2000 more than 25% of the global steam turbine capacity will be older than 30 years. The heat rate of such units is generally considerably higher than that of equivalent new plant, and such equipment can be further disadvantaged by increased maintenance costs and forced outage rates. Over the past decade steam turbine conversion, modification, and upgrade packages have become an increasingly important part of the European steam turbine market. Furthermore, many utilities now realize that enhanced cost-effectiveness can often be obtained by moving away from the original equipment manufacturer (OEM), and the upgrading of other manufacturers' plant is now routine within the steam turbine industry. By working closely with customers, GE has developed a comprehensive range of steam turbine upgrade packages, including advanced design steampaths which can increase the performance of existing turbine installations to levels comparable with new plant. Such packages are tailor-made to the requirements of each customer, to ensure that the most cost-effective engineering solution is identified. This paper presents an overview of GE's state-of-the-art steam turbine technology, and continues to describe typical economic models for turbine upgrades.

Wakeley, G.R.

1998-07-01T23:59:59.000Z

487

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

488

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

489

Jet spoiler arrangement for wind turbine  

DOE Patents (OSTI)

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

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

1983-09-15T23:59:59.000Z

490

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.

491

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...

492

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...

493

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

494

Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters  

E-Print Network (OSTI)

Matched-field methods concern estimation of source location and/or ocean environmental parameters by exploiting full wave modeling of acoustic waveguide propagation. Typical estimation performance demonstrates two fundamental ...

Xu, Wen, 1967-

2001-01-01T23:59:59.000Z

495

The Indian Ocean tsunami of December 26, 2004: observations in Sri Lanka and Thailand  

Science Journals Connector (OSTI)

On December 26, 2004 a great earthquake (M W 9.3) occurred off the western coast of Sumatra triggering a series of tsunami waves that propagated across the Indian Ocean causing damage and life los...

T. Rossetto; N. Peiris; A. Pomonis; S. M. Wilkinson; D. Del Re; R. Koo…

2007-07-01T23:59:59.000Z

496

Simulation and detection of tsunami signatures in ocean surface currents measured by HF radar  

Science Journals Connector (OSTI)

High-frequency (HF) surface wave radars provide the unique capability to continuously monitor the coastal environment far beyond the range of conventional microwave radars. Bragg-resonant backscattering by ocean ...

Klaus-Werner Gurgel; Anna Dzvonkovskaya; Thomas Pohlmann; Thomas Schlick…

2011-10-01T23:59:59.000Z

497

An ocean kinetic energy converter for low-power applications using piezoelectric disk elements  

Science Journals Connector (OSTI)

The main problem facing long-term electronic system deployments in the sea, is to find a feasible way to supply them with the power they require. Harvesting mechanical energy from the ocean wave oscillations and ...

C. Viñolo; D. Toma; A. Mànuel; J. del Rio

2013-09-01T23:59:59.000Z

498

SumTime-Turbine: A Knowledge-Based System to Communicate Gas Turbine Time-Series Data  

Science Journals Connector (OSTI)

SumTime-Turbine...produces textual summaries of archived time-series data from gas turbines. These summaries should help experts understand large...SumTime-Turbine is based on pattern detection, ...

Jin Yu; Ehud Reiter; Jim Hunter…

2003-01-01T23:59:59.000Z

499

Failure Analysis of Nozzle Guide Vane of a Low Pressure Turbine in an Aero Gas Turbine Engine  

Science Journals Connector (OSTI)

Failure of low pressure turbine nozzle guide vane (NGV) in an aero gas turbine engine is analyzed to determine its root ... failure has caused extensive damages in low pressure turbine modules. Remedial measures ...

R. K. Mishra; Johney Thomas; K. Srinivasan…

2014-10-01T23:59:59.000Z

500

Group-velocity tomography of South America and the surrounding oceans  

E-Print Network (OSTI)

Group-velocity tomography of South America and the surrounding oceans Oleg Vdovin,1 Jose¨ A. Rial,2 propagating across South America and the surrounding oceans. Broad-band waveform data from about 765 events and show that the average resolution across South America is about 60^80 for Rayleigh waves and 70

Ritzwolle, Mike