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


1

Observing Ocean Surface Waves with GPS-Tracked Buoys  

Science Conference Proceedings (OSTI)

Surface-following buoys are widely used to collect routine ocean wave measurements. While accelerometer and tilt sensors have been used for decades to measure the wave-induced buoy displacements, alternative global positioning system (GPS) sensor ...

T. H. C. Herbers; P. F. Jessen; T. T. Janssen; D. B. Colbert; J. H. MacMahan

2012-07-01T23:59:59.000Z

2

Wave Energy Extraction from buoys  

E-Print Network (OSTI)

Different types of Wave Energy Converters currently tested or under development are using the vertical movement of floating bodies to generate electricity. For commercial applications, arrays have to be considered in order ...

Garnaud, Xavier

2009-01-01T23:59:59.000Z

3

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

4

Category:Marine and Hydrokinetic Technologies | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Technologies Marine and Hydrokinetic Technologies Jump to: navigation, search Dictionary.png Looking for the Marine and Hydrokinetic Technology Database? Click here for a user-friendly list of Marine and Hydrokinetic Technologies. This category has the default of form Form:Marine and Hydrokinetic Technology. Pages in category "Marine and Hydrokinetic Technologies" The following 200 pages are in this category, out of 282 total. (previous 200) (next 200) 1 MHK Technologies/14 MW OTECPOWER A MHK Technologies/Aegir Dynamo MHK Technologies/AirWEC MHK Technologies/Anaconda bulge tube drives turbine MHK Technologies/AquaBuoy MHK Technologies/Aquanator MHK Technologies/Aquantis MHK Technologies/Archimedes Wave Swing MHK Technologies/Atlantis AN 150 MHK Technologies/Atlantis AR 1000

5

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

6

Intercomparison of the Performance of Operational Ocean Wave Forecasting Systems with Buoy Data  

Science Conference Proceedings (OSTI)

The monthly exchange of ocean wave model data has successfully been taking place among five operational weather centers. The data are compared with observations obtained from moored buoys and platforms. The analysis of 3 yr of data has helped to ...

Jean-Raymond Bidlot; Damian J. Holmes; Paul A. Wittmann; Roop Lalbeharry; Hsuan S. Chen

2002-04-01T23:59:59.000Z

7

The Maximum-Likelihood Property of Estimators of Wave Parameters from Heave, Pitch, and Roll Buoys  

Science Conference Proceedings (OSTI)

It is shown that ocean-wave spectrum parameters obtained from spectra of time series measured with heave, pitch, and roll data buoys are maximum-likelihood (ML) estimators under certain assumptions about the wave field. A modified set of ML ...

Ingrid K. Glad; Harald E. Krogstad

1992-04-01T23:59:59.000Z

8

Observation of the Power Spectrum of Ocean Waves Using a Cloverleaf Buoy  

Science Conference Proceedings (OSTI)

The power spectra of typical sets of ocean wave data obtained in the open ocean using a cloverleaf buoy are analyzed to determine an idealized form for the spectrum of ocean surface waves. It is shown that most of the single-peaked spectra ...

Hisashi Mitsuyasu; Fukuzo Tasai; Toshiro Suhara; Shinjiro Mizuno; Makoto Ohkusu; Tadao Honda; Kunio Rikiishi

1980-02-01T23:59:59.000Z

9

Direct Drive Wave Energy Buoy – Intermediate scale experiment  

SciTech Connect

Columbia Power Technologies deployed a scaled prototype wave energy converter (WEC) in the Puget Sound in February 2011. Other than a brief period (10 days) in which the WEC was removed for repair, it was in the water from Feb. 15, 2011 until Mar. 21, 2012. The SeaRay, as this WEC is known, consists of three rigid bodies which are constrained to move in a total of eight degrees of freedom (DOF). The SeaRay is kept on station with a spread, three-point mooring system. This prototype WEC is heavily instrumented, including but not limited to torque transducers and encoders reporting generator torque applied to and relative pitch of the floats, an inertial measurement unit (IMU) reporting translational acceleration and rotational position of the spar/nacelle, a GPS sensor reporting position, load cells reporting mooring loads at the WEC connection points and a number of strain gauges embedded in the fiberglass reinforced plastic (FRP) hull. Additionally, wave and current data are collected using an Acoustic Wave And Current Profiler (AWAC), allowing performance and design data to be correlated to environmental input conditions. This data – quality controlled, processed and analyzed – is used to characterize the metocean conditions (i.e. sea states). The WEC response will be correlated to the metocean conditions. These results will primarily be used to validate numerical models. The validated numerical models will be used optimize the commercial scale WEC and inform the design process. This document details the SeaRay experiment, including the quality control, processing and subsequent analysis of the data. Furthermore, the methodology and the results of numerical model validation will be described.

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

2013-07-29T23:59:59.000Z

10

Marine and Hydrokinetic | Department of Energy  

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

Marine and Hydrokinetic Marine and Hydrokinetic Marine and Hydrokinetic The Water Power Program's marine and hydrokinetic research and development (R&D) efforts focus on advancing technologies that capture energy from the nation's oceans and rivers. Unlike hydropower, marine and hydrokinetics represent an emerging industry with hundreds of potentially viable technologies. The program is therefore leading efforts to prove functionality; evaluate technical and economic viability; and generate cost, performance, and reliability data for a variety of devices. Marine and hydrokinetic energy technologies convert the energy of waves, tides, and river and ocean currents into electricity. The Department of Energy's "Marine and Hydrokinetic 101" video explains how these technologies work and highlights some of the Water Power Program's efforts

11

Marine & hydrokinetic technology development.  

DOE Green Energy (OSTI)

The Wind and Water Power Program supports the development of marine and hydrokinetic devices, which capture energy from waves, tides, ocean currents, the natural flow of water in rivers, and marine thermal gradients, without building new dams or diversions. The program works closely with industry and the Department of Energy's national laboratories to advance the development and testing of marine and hydrokinetic devices. In 2008, the program funded projects to develop and test point absorber, oscillating wave column, and tidal turbine technologies. The program also funds component design, such as techniques for manufacturing and installing coldwater pipes critical for ocean thermal energy conversion (OTEC) systems. Rigorous device testing is necessary to validate and optimize prototypes before beginning full-scale demonstration and deployment. The program supports device testing by providing technology developers with information on testing facilities. Technology developers require access to facilities capable of simulating open-water conditions in order to refine and validate device operability. The program has identified more than 20 tank testing operators in the United States with capabilities suited to the marine and hydrokinetic technology industry. This information is available to the public in the program's Hydrodynamic Testing Facilities Database. The program also supports the development of open-water, grid-connected testing facilities, as well as resource assessments that will improve simulations done in dry-dock and closed-water testing facilities. The program has established two university-led National Marine Renewable Energy Centers to be used for device testing. These centers are located on coasts and will have open-water testing berths, allowing researchers to investigate marine and estuary conditions. Optimal array design, development, modeling and testing are needed to maximize efficiency and electricity generation at marine and hydrokinetic power plants while mitigating nearby and distant impacts. Activities may include laboratory and computational modeling of mooring design or research on device spacing. The geographies, resources, technologies, and even nomenclature of the U.S. marine and hydrokinetic technology industry have yet to be fully understood or defined. The program characterizes and assesses marine and hydrokinetic devices, and then organizes the collected information into a comprehensive and searchable Web-based database, the Marine and Hydrokinetic Technology Database. The database, which reflects intergovernmental and international collaboration, provides industry with one of the most comprehensive and up-to-date public resources on marine and hydrokinetic devices.

LiVecchi, Al (National Renewable Energy Laboratory); Jepsen, Richard Alan

2010-06-01T23:59:59.000Z

12

Multimodal Properties of the Surface-Wave Field Observed with Pitch-Roll Buoys During GATE  

Science Conference Proceedings (OSTI)

A sophisticated analysis technique is applied to a subset of pitch-roll buoy data collected by the research vessels Gilliss and Quadra during the GARP Tropical Atlantic Experiment (GATE) in September 1974. The procedure enables the examination of ...

Linda Marie Lawson; Robert Bryan Long

1983-03-01T23:59:59.000Z

13

Marine and Hydrokinetic Resources | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Resources Marine and Hydrokinetic Resources (Redirected from Wave) Jump to: navigation, search << Return to the MHK database homepage Contents 1 Marine and Hydrokinetic Resource Assessment and Characterization 2 Current/Tidal/Riverine 3 Wave 4 Ocean Thermal Energy Conversion (OTEC) Marine and Hydrokinetic Resource Assessment and Characterization To find out more about Marine and Hydrokinetic Resource Assessment and Characterization click on this link. Current/Tidal/Riverine Tile Current.jpg To find out more about Tidal Energy click on this link and for Current Energy this link. Wave Wave 02.jpg To find out more about Wave Energy click on this link. Ocean Thermal Energy Conversion (OTEC) Ocean Thermo 04.jpg To find out more about OTEC Energy click on this link. << Return to the MHK database homepage

14

Marine and Hydrokinetic Resources | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Resources Marine and Hydrokinetic Resources Jump to: navigation, search << Return to the MHK database homepage Contents 1 Marine and Hydrokinetic Resource Assessment and Characterization 2 Current/Tidal/Riverine 3 Wave 4 Ocean Thermal Energy Conversion (OTEC) Marine and Hydrokinetic Resource Assessment and Characterization To find out more about Marine and Hydrokinetic Resource Assessment and Characterization click on this link. Current/Tidal/Riverine Tile Current.jpg To find out more about Tidal Energy click on this link and for Current Energy this link. Wave Wave 02.jpg To find out more about Wave Energy click on this link. Ocean Thermal Energy Conversion (OTEC) Ocean Thermo 04.jpg To find out more about OTEC Energy click on this link. << Return to the MHK database homepage

15

Wave and Hydrokinetics Interest Group 1st Meeting of 2009/2010 Year  

E-Print Network (OSTI)

.S. wave power plant license issued by FERC for the 1-MW Makah Bay, WA project was surrendered by Finavera Status ­ Wave power plant projects are being permitted in Europe ­ The time, cost and complexity of the U five years . · Economic Status: The first U.S. commercial wave plant project in Reedsport, OR, was made

16

Energy 101: Marine and Hydrokinetic Energy | Department of Energy  

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

Marine and Hydrokinetic Energy Marine and Hydrokinetic Energy Energy 101: Marine and Hydrokinetic Energy Addthis Below is the text version for the Energy 101: Marine & Hydrokinetic Energy video. The words "Energy 101: Marine & Hydrokinetic Energy" appear onscreen. Montage of renewable energy technologies ending with shots of ocean waves. We all know energy can come from the wind and the sun, but there's a plentiful renewable resource covering more than 75% of the planet that you might not have thought about: our water! The movement of the ocean's waves, tides, and currents carries energy that can be harnessed and converted into electricity to power our homes, buildings and cities. The words "Kinetic Energy" appear onscreen with shots of ocean scientists at sea. The words "Marine & Hydrokinetic" appear onscreen.

17

Energy 101: Marine & Hydrokinetic Energy | Department of Energy  

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

Marine & Hydrokinetic Energy Marine & Hydrokinetic Energy Energy 101: Marine & Hydrokinetic Energy August 13, 2013 - 10:54am Addthis See how marine and hydrokinetic technologies harness the energy of the ocean's waves, tides, and currents and convert it into electricity to power our homes, buildings, and cities. The oceans represent a largely untapped renewable energy resource with potential to provide clean electricity to coastal communities and cities across the United States. In this edition of Energy 101, learn how the Energy Department is supporting research on a range of innovative marine and hydrokinetic energy technologies to capture energy from waves and currents. For more information on marine and hydrokinetic energy from the Office of Energy Efficiency and Renewable Energy, visit the Water Power Program

18

An Evaluation of Environment Canada's Operational Ocean Wave Model Based on Moored Buoy Data  

Science Conference Proceedings (OSTI)

An operational ocean wave model called the Canadian Spectral Ocean Wave Model (CSOWM) has been implemented in the operational forecasting system of the Atmospheric Environment Service, Environment Canada, since early 1991. The present operational ...

M. L. Khandekar; R. Lalbeharry

1996-06-01T23:59:59.000Z

19

A Comparison of Methods for Determining Significant Wave Heights—Applied to a 3-m Discus Buoy during Hurricane Katrina  

Science Conference Proceedings (OSTI)

In August 2005, the eye of Hurricane Katrina passed 90 km to the west of a 3-m discus buoy deployed in the Mississippi Sound and operated by the Central Gulf of Mexico Ocean Observing System (CenGOOS). The buoy motions were measured with a ...

L. C. Bender III; N. L. Guinasso Jr.; J. N. Walpert; S. D. Howden

2010-06-01T23:59:59.000Z

20

Marine and Hydrokinetic Technology Database | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Database Marine and Hydrokinetic Technology Database Jump to: navigation, search Introduction The U.S. Department of Energy's Marine and Hydrokinetic Technology Database provides up-to-date information on marine and hydrokinetic renewable energy, both in the U.S. and around the world. The database includes wave, tidal, current, and ocean thermal energy, and contains information on the various energy conversion technologies, companies active in the field, and development of projects in the water. Depending on the needs of the user, the database can present a snapshot of projects in a given region, assess the progress of a certain technology type, or provide a comprehensive view of the entire marine and hydrokinetic energy industry. Using the Database (1) Map illustrates marine & hydrokinetic demonstration projects around the

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Expected Structure of Extreme Waves in a Gaussian Sea. Part I: Theory and SWADE Buoy Measurements  

Science Conference Proceedings (OSTI)

This paper is concerned with the expected configuration in space and time surrounding extremely high crests in a random wave field, or, equivalently, the mean configuration averaged over realizations of extreme events. A simple, approximate ...

O. M. Phillips; Daifang Gu; Mark Donelan

1993-05-01T23:59:59.000Z

22

Technological cost-reduction pathways for attenuator wave energy converters in the marine hydrokinetic environment.  

Science Conference Proceedings (OSTI)

This report considers and prioritizes the primary potential technical costreduction pathways for offshore wave activated body attenuators designed for ocean resources. This report focuses on technical research and development costreduction pathways related to the device technology rather than environmental monitoring or permitting opportunities. Three sources of information were used to understand current cost drivers and develop a prioritized list of potential costreduction pathways: a literature review of technical work related to attenuators, a reference device compiled from literature sources, and a webinar with each of three industry device developers. Data from these information sources were aggregated and prioritized with respect to the potential impact on the lifetime levelized cost of energy, the potential for progress, the potential for success, and the confidence in success. Results indicate the five most promising costreduction pathways include advanced controls, an optimized structural design, improved power conversion, planned maintenance scheduling, and an optimized device profile.

Bull, Diana L; Ochs, Margaret Ellen

2013-09-01T23:59:59.000Z

23

Technological cost-reduction pathways for attenuator wave energy converters in the marine hydrokinetic environment.  

SciTech Connect

This report considers and prioritizes the primary potential technical costreduction pathways for offshore wave activated body attenuators designed for ocean resources. This report focuses on technical research and development costreduction pathways related to the device technology rather than environmental monitoring or permitting opportunities. Three sources of information were used to understand current cost drivers and develop a prioritized list of potential costreduction pathways: a literature review of technical work related to attenuators, a reference device compiled from literature sources, and a webinar with each of three industry device developers. Data from these information sources were aggregated and prioritized with respect to the potential impact on the lifetime levelized cost of energy, the potential for progress, the potential for success, and the confidence in success. Results indicate the five most promising costreduction pathways include advanced controls, an optimized structural design, improved power conversion, planned maintenance scheduling, and an optimized device profile.

Bull, Diana L; Ochs, Margaret Ellen

2013-09-01T23:59:59.000Z

24

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

Science Conference Proceedings (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

25

INL - Hydrokinetic & Wave Technologies  

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

Open-Center Turbine (790KB PDF) Hydromatrix - Innovative Solution For Low Impact Hydropower at Existing Engineered Structures (2.2MB PDF) Hydraulic Cross-Flow Turbines (3.5MB...

26

NOAA Data Buoy Office Programs  

Science Conference Proceedings (OSTI)

The NOAA Data Buoy Office (NDBO) buoys provide vital meteorological and oceanographic reports from data-sparse marine areas. To provide a better understanding of the scope and potential of the buoy system, the buoy network, monitoring ...

Glenn D. Hamilton

1980-09-01T23:59:59.000Z

27

Freeze resistant buoy system  

DOE Patents (OSTI)

A freeze resistant buoy system includes a tail-tube buoy having a thermally insulated section disposed predominantly above a waterline, and a thermo-siphon disposed predominantly below the waterline.

Hill, David E. (Knoxville, TN); Rodriguez, Jr., Miguel (Oak Ridge, TN); Greenbaum, Elias (Knoxville, TN); Klett, James W. (Knoxville, TN)

2007-08-21T23:59:59.000Z

28

Wave Dragon  

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

Overtopping Wave Devices Wave Dragon ApSLtd HWETTEI - Workshop October 26-28, 2005, Washington, DC Hydrokinetic Technologies Technical and Environmental Issues Workshop the Wave...

29

Marine & Hydrokinetic Technologies (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet describes the U.S. Department of Energy's Water Power Program. The program supports the development of advanced water power devices that capture energy from waves, tides, ocean currents, rivers, streams, and ocean thermal gradients. The program works to promote the development and deployment of these new technologies, known as marine and hydrokinetic technologies, to assess the potential extractable energy from rivers, estuaries, and coastal waters, and to help industry harness this renewable, emissions-free resource to generate environmentally sustainable and cost-effective electricity.

Not Available

2010-04-01T23:59:59.000Z

30

MHK Technologies/Finavera Buoy | Open Energy Information  

Open Energy Info (EERE)

Finavera Buoy Finavera Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Finavera Buoy.jpg Technology Profile Primary Organization Oregon Iron Works Inc 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 MARINE DIVISION Oregon Iron Works Inc OIW has a globally recognized Marine Division with a wide range of advanced accomplishments from custom design prototype development Fabricate OPT Power Take Off 2007 Design Build Finavera Buoy 2007 Fabricate OPT Next Generation Buoy 2008 2009 large scale production outfitting electrical mechanical hydraulic pneumatic

31

National Data Buoy Center Programs  

Science Conference Proceedings (OSTI)

The National Data Buoy Center(NDBC) operates ocean and coastal buoys and coastal land stations that report hourly through the Geostationary Operational Environmental Satellite (GOES) system. In addition, NDBC maintains drifting-buoy networks that ...

Glenn D. Hamilton

1986-04-01T23:59:59.000Z

32

MHK Technologies/IPS OWEC Buoy | Open Energy Information  

Open Energy Info (EERE)

IPS OWEC Buoy IPS OWEC Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage IPS OWEC Buoy.jpg Technology Profile Primary Organization Interproject Service AB Technology Resource Click here Wave Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description The IPS OWEC Offshore Wave Energy Converter Buoy is a system for generating electricity from ocean waves at a cost competitive with fossil fuel generated power Cluster of buoys gives energy and act as wave breaker Off shore wave energy converters and systems with great flexibility Units from 10 kW 150 kW annual mean power A new interesting alternative for the internal energy conversion is based on a set of hose pumps driven by the piston in the acceleration tube pumping water to a small turbine directly coupled to a special generator

33

ASIS—A New Air–Sea Interaction Spar Buoy: Design and Performance at Sea  

Science Conference Proceedings (OSTI)

This paper describes a new, compact buoy, the Air–Sea Interaction Spar (ASIS), capable of reliably and accurately measuring directional wave spectra, atmospheric surface fluxes, and radiation in the the open ocean. The ASIS buoy is a stable ...

Hans C. Graber; Eugene A. Terray; Mark A. Donelan; William M. Drennan; John C. Van Leer; Donald B. Peters

2000-05-01T23:59:59.000Z

34

A Comparison of Directional Buoy and Fixed Platform Measurements Of Pacific Swell  

Science Conference Proceedings (OSTI)

The performance of the Datawell Directional Waverider and the National Data Buoy Center (NDBC) 3-m discus buoy, widely used to measure the directional properties of surface gravity waves, are evaluated through comparisons to an array of six ...

W. C. O'Reilly; T. H. C. Herbers; R. J. Seymour; R. T. Guza

1996-02-01T23:59:59.000Z

35

MHK Technologies/WAG Buoy | Open Energy Information  

Open Energy Info (EERE)

WAG Buoy WAG Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage WAG Buoy.jpg Technology Profile Primary Organization Ryokuseisha Corporation Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Wave Activated Generator Buoy By using the wave activated generator as the power supply for a buoy excellent economic and maintenance power saving properties are realized There is a complete line from mid size models for use with harbor engineering works to large models for use as actual channel markers The solar cell and the all purpose type hybrid type can also be used Technology Dimensions

36

NREL: Water Power Research - Marine and Hydrokinetic Technology...  

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

Marine and Hydrokinetic Technology Instrumentation, Measurement, and Computer Modeling Workshop The Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and...

37

MHK Technologies/PowerBuoy | Open Energy Information  

Open Energy Info (EERE)

PowerBuoy PowerBuoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage PowerBuoy.jpg Technology Profile Primary Organization Oregon Wave Energy Partners LLC Project(s) where this technology is utilized *MHK Projects/Coos Bay OPT Wave Park *MHK Projects/Cornwall Wave Hub *MHK Projects/Griffin Project *MHK Projects/NJBPU 1 5 MW Demonstration Program *MHK Projects/Orkney *MHK Projects/Reedsport OPT Wave Park *MHK Projects/Reedsport OPT Wave Park Expanded Project *MHK Projects/Santona Wave Energy Park *MHK Projects/US Navy Wave Energy Technology WET Program at Marine Corps Base Hawaii MCBH Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 9: Commercial-Scale Production / Application

38

Marine and Hydrokinetic Technology Glossary | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Glossary Marine and Hydrokinetic Technology Glossary (Redirected from Hybrid) Jump to: navigation, search << Return to the MHK database homepage Contents 1 Wave Power 1.1 Point Absorber 1.1.1 Submerged Pressure Differential (Example of a Point Absorber) 1.2 Oscillating Water Column 1.3 Overtopping Device 1.4 Attentuator 1.5 Oscillating Wave Surge Converter 2 Current Power 2.1 Axial Flow Turbine 2.2 Cross Flow Turbine 2.3 Reciprocating Device 2.3.1 Oscillating Hydrofoil: (Example of a Reciprocating Device) 3 Ocean Thermal Energy Conversion (OTEC) 3.1 Closed-cycle 3.2 Open-cycle 3.3 Hybrid Wave Power Graphics adapted from Bedard and Thresher Point Absorber Pointabsorber.jpg Wave energy capture device, with principal dimension relatively small compared to the wavelength, and is able to capture energy from a wave front

39

Marine and Hydrokinetic Technology Glossary | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Glossary Marine and Hydrokinetic Technology Glossary (Redirected from Attenuator) Jump to: navigation, search << Return to the MHK database homepage Contents 1 Wave Power 1.1 Point Absorber 1.1.1 Submerged Pressure Differential (Example of a Point Absorber) 1.2 Oscillating Water Column 1.3 Overtopping Device 1.4 Attentuator 1.5 Oscillating Wave Surge Converter 2 Current Power 2.1 Axial Flow Turbine 2.2 Cross Flow Turbine 2.3 Reciprocating Device 2.3.1 Oscillating Hydrofoil: (Example of a Reciprocating Device) 3 Ocean Thermal Energy Conversion (OTEC) 3.1 Closed-cycle 3.2 Open-cycle 3.3 Hybrid Wave Power Graphics adapted from Bedard and Thresher Point Absorber Pointabsorber.jpg Wave energy capture device, with principal dimension relatively small compared to the wavelength, and is able to capture energy from a wave front

40

Marine and Hydrokinetic Technology Glossary | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Glossary Marine and Hydrokinetic Technology Glossary Jump to: navigation, search << Return to the MHK database homepage Contents 1 Wave Power 1.1 Point Absorber 1.1.1 Submerged Pressure Differential (Example of a Point Absorber) 1.2 Oscillating Water Column 1.3 Overtopping Device 1.4 Attentuator 1.5 Oscillating Wave Surge Converter 2 Current Power 2.1 Axial Flow Turbine 2.2 Cross Flow Turbine 2.3 Reciprocating Device 2.3.1 Oscillating Hydrofoil: (Example of a Reciprocating Device) 3 Ocean Thermal Energy Conversion (OTEC) 3.1 Closed-cycle 3.2 Open-cycle 3.3 Hybrid Wave Power Graphics adapted from Bedard and Thresher Point Absorber Pointabsorber.jpg Wave energy capture device, with principal dimension relatively small compared to the wavelength, and is able to capture energy from a wave front

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

MHK Technologies/Electric Buoy | Open Energy Information  

Open Energy Info (EERE)

Buoy Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Electric Buoy.jpg Technology Profile Primary Organization Aqua Magnetics Inc 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 AMI s Ocean Swell and Wave Energy Conversion OSWEC device uses a patented linear generator to directly convert the motion of ocean swells and waves into electric power In our initial designs the generator mounts underneath a floating buoy or on the surface of a platform with the buoy below however it is possible to fit the generator on other types of wave motion energy extracting mechanisms Housing moves up and down with the motion of the Buoy on the ocean s surface while the Damping Plates hold the Generator Coil in a stable position The relative motion between the magnetic field in the generator housing and Generator Coil creates an electric voltage in the Generator Coil After four design evolutions Aqua Magnetics Inc has created our patented reciprocating linear generator Scalable for a wide range of applications and able to operate in a wide range of sea states Generator prototype will produce approximately 10 watts of power in 15 cm 6 inch wind chop in the intraco

42

Marine and Hydrokinetic Technology Database  

DOE Data Explorer (OSTI)

Results are displayed as a list of technologies, companies, or projects. Data can be filtered by a number of criteria, including country/region, technology type, generation capacity, and technology or project stage. The database is currently (2009) being updated to include ocean thermal energy technologies, companies, and projects.[Taken from http://www2.eere.energy.gov/windandhydro/hydrokinetic/

43

MHK Technologies/Direct Drive Power Generation Buoy | Open Energy  

Open Energy Info (EERE)

Power Generation Buoy Power Generation Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Direct Drive Power Generation Buoy.jpg Technology Profile Primary Organization Columbia Power Technologies Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description Direct drive point absorber In 2005 Oregon State University entered into an exclusive license agreement with Columbia Power Technologies to jointly develop a direct drive wave energy conversion device Designed to be anchored 2 5 miles off the Oregon coast in 130 feet of water it uses the rise and fall of ocean waves to generate electricity Mooring Configuration Anchored

44

Green Ocean Wave Energy | Open Energy Information  

Open Energy Info (EERE)

Ocean Wave Energy Jump to: navigation, search Name Green Ocean Wave Energy Sector Marine and Hydrokinetic Website http:http:www.greenoceanwa Region United States LinkedIn...

45

MHK Technologies/The B1 buoy | Open Energy Information  

Open Energy Info (EERE)

buoy buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage The B1 buoy.gif Technology Profile Primary Organization Fred Olsen Ltd Technology Resource Click here Wave Technology Type Click here Attenuator Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description Proprietary Mooring Configuration Proprietary Technology Dimensions Technology Nameplate Capacity (MW) Proprietary Device Testing Scale Test *Currently undergoing open sea testing scaled device Previous tests carried out in the sea with scaled devices 1 20 1 10 and 1 3 scale including the use of the research rig Buldra Lab Test *Various tests performed both in dry conditions and in wave test tanks 1 33 1 20 1 3

46

MHK Technologies/OE Buoy OE 50 | Open Energy Information  

Open Energy Info (EERE)

OE Buoy OE 50 OE Buoy OE 50 < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage OE Buoy OE 50.jpg Technology Profile Primary Organization Ocean Energy Ltd Project(s) where this technology is utilized *MHK Projects/Ocean Energy Galway Bay IE *MHK Projects/OE Buoy OE 30 Technology Resource Click here Wave Technology Type Click here Oscillating Water Column Technology Readiness Level Click here TRL 7/8: Open Water System Testing & Demonstration & Operation Technology Description The OEBuoy device uses wave energy to compress air in a plenum chamber and pump it through an air turbine system. This isolates the power conversion system from the seawater and also provides a high-speed air flow to the turbine. The device is a floating system with the mouth of the OWC facing away from the wave direction. This results in high energy efficiencies at the operating point because of the motions of the float system relative to the waves.

47

Green Wave Energy Corp GWEC | Open Energy Information  

Open Energy Info (EERE)

Green Wave Energy Corp GWEC Jump to: navigation, search Name Green Wave Energy Corp GWEC Sector Marine and Hydrokinetic Website http:http:greenwaveenergyc Region United States...

48

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

49

MHK Technologies/AquaBuoy | Open Energy Information  

Open Energy Info (EERE)

AquaBuoy AquaBuoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage AquaBuoy.jpg Technology Profile Primary Organization Finavera Renewables Ocean Energy Ltd Project(s) where this technology is utilized *MHK Projects/Figueira da Foz Portugal *MHK Projects/Humboldt County Wave Project *MHK Projects/Makah Bay Offshore Wave Pilot Project *MHK Projects/South Africa *MHK Projects/Ucluelet BC Canada Technology Resource Click here Wave Technology Type Click here Point Absorber Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The Aquabuoy 2.0 is a large 3 meter wide buoy tied to a 70-foot-long shaft. By bobbing up and down, the water is rushed into an acceleration tube, which in turn causes a piston to move. This moving of the piston causes a steel reinforced rubber hose to stretch, making it act as a pump. The water is then pumped into a turbine which in turns powers a generator. The electricity generated is brought to shore via a standard submarine cable.

50

Southern Ocean Surface Characteristics from FGGE Buoys  

Science Conference Proceedings (OSTI)

In this analysis of satellite-tracked drifting surface buoys released in the Southern Ocean, buoy velocities are averaged along trajectories for 90 days to determine the mean circulation, and eddy kinetic energy is computed using perturbations ...

Mark Andrew Johnson

1989-05-01T23:59:59.000Z

51

Marine and Hydrokinetic Renewable Energy Devices, Potential Navigational Hazards and Mitigation Measures  

DOE Green Energy (OSTI)

On April 15, 2008, the Department of Energy (DOE) issued a Funding Opportunity Announcement for Advanced Water Power Projects which included a Topic Area for Marine and Hydrokinetic Renewable Energy Market Acceleration Projects. Within this Topic Area, DOE identified potential navigational impacts of marine and hydrokinetic renewable energy technologies and measures to prevent adverse impacts on navigation as a sub-topic area. DOE defines marine and hydrokinetic technologies as those capable of utilizing one or more of the following resource categories for energy generation: ocean waves; tides or ocean currents; free flowing water in rivers or streams; and energy generation from the differentials in ocean temperature. PCCI was awarded Cooperative Agreement DE-FC36-08GO18177 from the DOE to identify the potential navigational impacts and mitigation measures for marine hydrokinetic technologies. A technical report addressing our findings is available on this Science and Technology Information site under the Product Title, "Marine and Hydrokinetic Renewable Energy Technologies: Potential Navigational Impacts and Mitigation Measures". This product is a brochure, primarily for project developers, that summarizes important issues in that more comprehensive report, identifies locations where that report can be downloaded, and identifies points of contact for more information.

Cool, Richard, M.; Hudon, Thomas, J.; Basco, David, R.; Rondorf, Neil, E.

2009-12-01T23:59:59.000Z

52

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

53

Submersible Generator for Marine Hydrokinetics  

SciTech Connect

A submersible generator was designed as a distinct and critical subassembly of marine hydrokinetics systems, specifically tidal and stream energy conversion. The generator is designed to work with both vertical and horizontal axis turbines. The final product is a high-pole-count, radial-flux, permanent magnet, rim mounted generator, initially rated at twenty kilowatts in a two-meter-per-second flow, and designed to leverage established and simple manufacturing processes. The generator was designed to work with a 3 meter by 7 meter Gorlov Helical Turbine or a marine hydrokinetic version of the FloDesign wind turbine. The team consisted of experienced motor/generator design engineers with cooperation from major US component suppliers (magnetics, coil winding and electrical steel laminations). Support for this effort was provided by Lucid Energy Technologies and FloDesign, Inc. The following tasks were completed: � Identified the conditions and requirements for MHK generators. � Defined a methodology for sizing and rating MHK systems. � Selected an MHK generator topology and form factor. � Completed electromechanical design of submersible generator capable of coupling to multiple turbine styles. � Investigated MHK generator manufacturing requirements. � Reviewed cost implications and financial viability. � Completed final reporting and deliverables

Robert S. Cinq-Mars; Timothy Burke; Dr. James Irish; Brian Gustafson; Dr. James Kirtley; Dr. Aiman Alawa

2011-09-01T23:59:59.000Z

54

NREL: Dynamic Maps, GIS Data, and Analysis Tools - Marine & Hydrokinetic  

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

Marine & Hydrokinetic Data Marine & Hydrokinetic Data 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. The total available energy resource along the U.S. continental shelf edge,

55

MHK Technologies/SeaRaser buoy seawater pump | Open Energy Information  

Open Energy Info (EERE)

SeaRaser buoy seawater pump SeaRaser buoy seawater pump < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage SeaRaser buoy seawater pump.jpg Technology Profile Primary Organization Dartmouth Wave Energy Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description SEARASER uses wave displacement to lift a float attached to a piston and uses gravity in the wave s following trough to push the piston back down It is different from other wecs as it is tethered to a weight on the seabed by a single flexible tether but utilises a double acting piston thereby producing volumes of pressurised water in both directions of the piston

56

The FGGE Arctic Data Buoy Program  

Science Conference Proceedings (OSTI)

An array of about 20 drifting data buoys was established in the Arctic Ocean during the early months of 1979. The position of each buoy and the surface pressure and temperature are measured several times daily. The program expands our capability ...

A. S. Thorndike

1980-12-01T23:59:59.000Z

57

Statistics of Breaking Waves Observed as Whitecaps in the Open Sea  

Science Conference Proceedings (OSTI)

Conventional observations of waves carried out with a buoy in open sea conditions were supplemented with simultaneous visual observations of whitecaps to identify breaking events in the buoy records. A statistical wave-by-wave analysis of these ...

L. H. Holthuijsen; T. H. C. Herbers

1986-02-01T23:59:59.000Z

58

Marine and Hydrokinetic Renewable Energy Technologies: Potential Navigational Impacts and Mitigation Measures  

DOE Green Energy (OSTI)

On April 15, 2008, the Department of Energy (DOE) issued a Funding Opportunity Announcement for Advanced Water Power Projects which included a Topic Area for Marine and Hydrokinetic Renewable Energy Market Acceleration Projects. Within this Topic Area, DOE identified potential navigational impacts of marine and hydrokinetic renewable energy technologies and measures to prevent adverse impacts on navigation as a sub-topic area. DOE defines marine and hydrokinetic technologies as those capable of utilizing one or more of the following resource categories for energy generation: ocean waves; tides or ocean currents; free flowing water in rivers or streams; and energy generation from the differentials in ocean temperature. PCCI was awarded Cooperative Agreement DE-FC36-08GO18177 from the DOE to identify the potential navigational impacts and mitigation measures for marine hydrokinetic technologies, as summarized herein. The contract also required cooperation with the U.S. Coast Guard (USCG) and two recipients of awards (Pacific Energy Ventures and reVision) in a sub-topic area to develop a protocol to identify streamlined, best-siting practices. Over the period of this contract, PCCI and our sub-consultants, David Basco, Ph.D., and Neil Rondorf of Science Applications International Corporation, met with USCG headquarters personnel, with U.S. Army Corps of Engineers headquarters and regional personnel, with U.S. Navy regional personnel and other ocean users in order to develop an understanding of existing practices for the identification of navigational impacts that might occur during construction, operation, maintenance, and decommissioning. At these same meetings, “standard” and potential mitigation measures were discussed so that guidance could be prepared for project developers. Concurrently, PCCI reviewed navigation guidance published by the USCG and international community. This report summarizes the results of this effort, provides guidance in the form of a checklist for assessing the navigational impacts of potential marine and hydrokinetic projects, and provides guidance for improving the existing navigational guidance promulgated by the USCG in Navigation Vessel Inspection Circular 02 07. At the request of the USCG, our checklist and mitigation guidance was written in a generic nature so that it could be equally applied to offshore wind projects. PCCI teleconferenced on a monthly basis with DOE, Pacific Energy Ventures and reVision in order to share information and review work products. Although the focus of our effort was on marine and hydrokinetic technologies, as defined above, this effort drew upon earlier work by the USCG on offshore wind renewable energy installations. The guidance provided herein can be applied equally to marine and hydrokinetic technologies and to offshore wind, which are collectively referred to by the USCG as Renewable Energy Installations.

Cool, Richard, M.; Hudon, Thomas, J.; Basco, David, R.; Rondorf, Neil, E.

2009-12-10T23:59:59.000Z

59

Category:Marine and Hydrokinetic Technology Projects | Open Energy  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Projects Marine and Hydrokinetic Technology Projects Jump to: navigation, search Dictionary.png Looking for the Marine and Hydrokinetic Technology Database? Click here for a user-friendly list of Marine and Hydrokinetic Technology Projects. This category has the default of form Form:Marine and Hydrokinetic Technology Project. Pages in category "Marine and Hydrokinetic Technology Projects" The following 200 pages are in this category, out of 379 total. (previous 200) (next 200) 4 MHK Projects/40MW Lewis project A MHK Projects/ADM 3 MHK Projects/ADM 4 MHK Projects/ADM 5 MHK Projects/Admirality Inlet Tidal Energy Project MHK Projects/Agucadoura MHK Projects/Alaska 1 MHK Projects/Alaska 13 MHK Projects/Alaska 17 MHK Projects/Alaska 18 MHK Projects/Alaska 24 MHK Projects/Alaska 25

60

Form:Marine and Hydrokinetic Technology | Open Energy Information  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Marine and Hydrokinetic Technology Jump to: navigation, search Add a Marine and Hydrokinetic Technology Input the name of your Marine and Hydrokinetic Technology below to add it to the registry. If your technology is already in the registry, the form will be populated with that technology's fields and you may edit. MHK_Technologies/ Submit The text entered into this field will be used as the name of the project being defined. All projects are automatically prefixed with MHK_Technologies/. The field is case sensitive so be sure to capitalize in the correct areas and type the full title properly. << Return to the Marine and Hydrokinetic Database Retrieved from "http://en.openei.org/w/index.php?title=Form:Marine_and_Hydrokinetic_Technology&oldid=680669"

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Evaluation of Fish Injury and Mortality Associated with Hydrokinetic Turbines  

Science Conference Proceedings (OSTI)

Considerable efforts have been underway to develop hydrokinetic energy resources in tidal and riverine environments throughout North America. Potential for fish to be injured or killed if they encounter hydrokinetic turbines is an issue of significant interest to resource and regulatory agencies. To address this issue, flume studies were conducted that exposed fish to two hydrokinetic turbine designs to determine injury and survival rates and to assess behavioral reactions and avoidance. Also, a theoreti...

2011-11-29T23:59:59.000Z

62

MHK Technologies/In stream River Hydrokinetics | Open Energy Information  

Open Energy Info (EERE)

In stream River Hydrokinetics In stream River Hydrokinetics < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization ABS Alaskan Inc Technology Resource Click here Current Technology Readiness Level Click here TRL 7 8 Open Water System Testing Demonstration and Operation Technology Description New Energy Corporation EnCurrent vertical axis turbine mounted on pontoon barge Technology Dimensions Device Testing Date Submitted 10:01.5 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/In_stream_River_Hydrokinetics&oldid=680959" Category: Marine and Hydrokinetic Technologies What links here Related changes Special pages Printable version

63

Form:Marine and Hydrokinetic Technology Test | Open Energy Information  

Open Energy Info (EERE)

this page on Facebook icon Twitter icon Form:Marine and Hydrokinetic Technology Test Jump to: navigation, search Retrieved from "http:en.openei.orgw...

64

Category:Marine and Hydrokinetic Technology Tests | Open Energy...  

Open Energy Info (EERE)

Technology Tests Jump to: navigation, search Marine and Hydrokinetic Technology Test This category currently contains no pages or media. Retrieved from "http:...

65

Programs of the National Data Buoy Center  

Science Conference Proceedings (OSTI)

Platforms of the National Data Buoy Center provide vital meteorological and oceanographic observations from data-sparse marine areas worldwide. The data are essential for real-time weather forecasting and research programs. This paper provides ...

Eric A. Meindl; Glenn D. Hamilton

1992-07-01T23:59:59.000Z

66

Motor Wave Group | Open Energy Information  

Open Energy Info (EERE)

Wave Group Jump to: navigation, search Name Motor Wave Group Place Hong Kong Sector Marine and Hydrokinetic Website http:www.motorwavegroup.com Region China LinkedIn Connections...

67

Wave Energy Centre | Open Energy Information  

Open Energy Info (EERE)

search Name Wave Energy Centre Address Wave Energy Centre Av Manuela da Maia 36 R C Dto Place Lisboa Zip 1000-201 Sector Marine and Hydrokinetic Phone number (+351) 21...

68

Kinetic Wave Power | Open Energy Information  

Open Energy Info (EERE)

Kinetic Wave Power Jump to: navigation, search Name Kinetic Wave Power Address 2861 N Tupelo St Place Midland Zip 48642 Sector Marine and Hydrokinetic Phone number 989-839-9757...

69

Wind Waves and Sun | Open Energy Information  

Open Energy Info (EERE)

Waves and Sun Jump to: navigation, search Name Wind Waves and Sun Sector Marine and Hydrokinetic Website http:www.windwavesandsun.com Region United States LinkedIn Connections...

70

River Hydrokinetic Resource Atlas | Open Energy Information  

Open Energy Info (EERE)

River Hydrokinetic Resource Atlas River Hydrokinetic Resource Atlas Jump to: navigation, search Tool Summary LAUNCH TOOL Name: River Hydrokinetic Resource Atlas Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Water Power Resource Type: Maps, Software/modeling tools User Interface: Website Website: maps.nrel.gov/river_atlas Country: United States Web Application Link: maps.nrel.gov/river_atlas Cost: Free UN Region: Northern America Coordinates: 39.7412019515°, -105.172290802° 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":39.7412019515,"lon":-105.172290802,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

71

Tropical Moored Buoy Implementation Panel (TIP) Report M. J. McPhaden, NOAA/PMEL  

E-Print Network (OSTI)

Hole technical report in December 2002. Barometric pressure and downwelling long wave radiation fromTropical Moored Buoy Implementation Panel (TIP) Report M. J. McPhaden, NOAA/PMEL Prepared. This year, field testing of sonic anemometers has begun in the hopes of reducing wind data loss from

72

HYDROKAL: A module for in-stream hydrokinetic resource assessment  

Science Conference Proceedings (OSTI)

A new tool for hydrokinetic energy potential assessment in rivers-HYDROKAL, which stands for a ''hydrokinetic calculator''-is presented. This tool was developed in the Fortran 90 programming language as an external module for the CCHE2D application, ... Keywords: Instantaneous power density, Numerical modeling, Resource assessment, Stream

Paul Duvoy; Horacio Toniolo

2012-02-01T23:59:59.000Z

73

A Novel and Low Cost Sea Ice Mass Balance Buoy.  

Science Conference Proceedings (OSTI)

The understanding of sea ice mass balance processes requires continuous monitoring of the seasonal evolution of the ice thickness. While autonomous ice mass balance buoys (IMB buoys) deployed over the past two decades have contributed to our ...

Keith Jackson; Jeremy Wilkinson; Ted Maksym; Justin Beckers; Christian Haas; David Meldrum; David Mackenzie

74

A Piezoelectrical Rain Gauge for Application on Buoys  

Science Conference Proceedings (OSTI)

Rain gauge systems are required to measure rainfall data on buoys at oceanic sites that are not suited for conventional rain sensors. A piezoelectrical rain gauge has been developed for use on buoys, to provide rain measurements just above the ...

Jörg Förster; Giselher Gust; Siegfried Stolte

2004-02-01T23:59:59.000Z

75

Marine & Hydrokinetic Technologies (Fact Sheet), Wind And Water Power Program (WWPP)  

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

Water Power Program Water Power Program supports the development of advanced water power devices that capture energy from waves, tides, ocean currents, rivers, streams, and ocean thermal gradients. The program works to promote the development and deployment of these new tech- nologies, known as marine and hydrokinetic technologies, to assess the potential extractable energy from rivers, estuaries, and coastal waters, and to help industry harness this renew- able, emissions-free resource to generate environmentally sustainable and cost-effective electricity. The program's research and development efforts fall under two categories: Technology Development and Market Acceleration. Technology Development The Water Power Program works with industry partners, universities, and the Department of Energy's national

76

Form:Marine and Hydrokinetic Technology Project | Open Energy Information  

Open Energy Info (EERE)

Form Form Edit History Facebook icon Twitter icon » Form:Marine and Hydrokinetic Technology Project Jump to: navigation, search Add a Marine and Hydrokinetic Technology Project Input the name of your Marine and Hydrokinetic Technology Project below to add it to the registry. If your project is already in the registry, the form will be populated with that project's fields and you may edit. MHK_Projects/ Submit The text entered into this field will be used as the name of the project being defined. All projects are automatically prefixed with MHK_Projects/. The field is case sensitive so be sure to capitalize in the correct areas and type the full title properly. << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=Form:Marine_and_Hydrokinetic_Technology_Project&oldid=688143"

77

NREL: Dynamic Maps, GIS Data, and Analysis Tools - Marine & Hydrokinet...  

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

easier. A screen capture of the MapSearch Map view option Marine & Hydrokinetic Maps Hydropower already provides 6-7% of the nation's electricity, and the ocean represents a...

78

Estimation of the Risks of Collision or Strike to Freshwater Aquatic Organisms Resulting from Operation of Instream Hydrokinetic Turbines  

DOE Green Energy (OSTI)

Hydrokinetic energy technologies have been proposed as renewable, environmentally preferable alternatives to fossil fuels for generation of electricity. Hydrokinetic technologies harness the energy of water in motion, either from waves, tides or from river currents. For energy capture from free-flowing rivers, arrays of rotating devices are most commonly proposed. The placement of hydrokinetic devices in large rivers is expected to increase the underwater structural complexity of river landscapes. Moore and Gregory (1988) found that structural complexity increased local fish populations because fish and other aquatic biota are attracted to structural complexity that provides microhabitats with steep flow velocity gradients (Liao 2007). However, hydrokinetic devices have mechanical parts, blades, wings or bars that move through the water column, posing a potential strike or collision risk to fish and other aquatic biota. Furthermore, in a setting with arrays of hydrokinetic turbines the cumulative effects of multiple encounters may increase the risk of strike. Submerged structures associated with a hydrokinetic (HK) project present a collision risk to aquatic organisms and diving birds (Cada et al. 2007). Collision is physical contact between a device or its pressure field and an organism that may result in an injury to that organism (Wilson et al. 2007). Collisions can occur between animals and fixed submerged structures, mooring equipment, horizontal or vertical axis turbine rotors, and structures that, by their individual design or in combination, may form traps. This report defines strike as a special case of collision where a moving part, such as a rotor blade of a HK turbine intercepts the path of an organism of interest, resulting in physical contact with the organism. The severity of a strike incidence may range from minor physical contact with no adverse effects to the organism to severe strike resulting in injury or death of the organism. Harmful effects to animal populations could occur directly (e.g., from strike mortality of individuals) or indirectly (e.g., if the loss of prey species to strike reduces food for predators). Although actively swimming or passively drifting animals may collide with any of the physical structures associated with hydrokinetic devices, turbine rotors are the most likely sources for risk of strike or significant collision (DOE 2009). It is also possible that during a close encounter with a HK device no physical contact will be made between the device and the organism, either because the animal avoids the device by successfully changing its direction of movement, or by successfully evading any moving parts of the device. Oak Ridge National Laboratory (ORNL) has been funded by the US Department of Energy (DOE) Waterpower Program to evaluate strike potential and consequences for Marine and Hydrokinetic (MHK) technologies in rivers and estuaries of the United States. We will use both predictive models and laboratory/field experiments to evaluate the likelihood and consequences of strike at HK projects in rivers. Efforts undertaken at ORNL address three objectives: (1) Assess strike risk for marine and freshwater organisms; (2) Develop experimental procedures to assess the risk and consequences of strike; and (3) Conduct strike studies in experimental flumes and field installations of hydrokinetic devices. During the first year of the study ORNL collected information from the Federal Energy Regulatory Commission (FERC) MHK database about geographical distribution of proposed hydrokinetic projects (what rivers or other types of systems), HK turbine design (horizontal axis, vertical axis, other), description of proposed axial turbine (number of blades, size of blades, rotation rate, mitigation measures), and number of units per project. Where site specific information was available, we compared the location of proposed projects rotors within the channel (e.g., along cutting edge bank, middle of thalweg, near bottom or in midwater) to the general locations of fish in the river (shoreline,

Schweizer, Peter E [ORNL; Cada, Glenn F [ORNL; Bevelhimer, Mark S [ORNL

2010-05-01T23:59:59.000Z

79

Estimation of the Risks of Collision or Strike to Freshwater Aquatic Organisms Resulting from Operation of Instream Hydrokinetic Turbines  

Science Conference Proceedings (OSTI)

Hydrokinetic energy technologies have been proposed as renewable, environmentally preferable alternatives to fossil fuels for generation of electricity. Hydrokinetic technologies harness the energy of water in motion, either from waves, tides or from river currents. For energy capture from free-flowing rivers, arrays of rotating devices are most commonly proposed. The placement of hydrokinetic devices in large rivers is expected to increase the underwater structural complexity of river landscapes. Moore and Gregory (1988) found that structural complexity increased local fish populations because fish and other aquatic biota are attracted to structural complexity that provides microhabitats with steep flow velocity gradients (Liao 2007). However, hydrokinetic devices have mechanical parts, blades, wings or bars that move through the water column, posing a potential strike or collision risk to fish and other aquatic biota. Furthermore, in a setting with arrays of hydrokinetic turbines the cumulative effects of multiple encounters may increase the risk of strike. Submerged structures associated with a hydrokinetic (HK) project present a collision risk to aquatic organisms and diving birds (Cada et al. 2007). Collision is physical contact between a device or its pressure field and an organism that may result in an injury to that organism (Wilson et al. 2007). Collisions can occur between animals and fixed submerged structures, mooring equipment, horizontal or vertical axis turbine rotors, and structures that, by their individual design or in combination, may form traps. This report defines strike as a special case of collision where a moving part, such as a rotor blade of a HK turbine intercepts the path of an organism of interest, resulting in physical contact with the organism. The severity of a strike incidence may range from minor physical contact with no adverse effects to the organism to severe strike resulting in injury or death of the organism. Harmful effects to animal populations could occur directly (e.g., from strike mortality of individuals) or indirectly (e.g., if the loss of prey species to strike reduces food for predators). Although actively swimming or passively drifting animals may collide with any of the physical structures associated with hydrokinetic devices, turbine rotors are the most likely sources for risk of strike or significant collision (DOE 2009). It is also possible that during a close encounter with a HK device no physical contact will be made between the device and the organism, either because the animal avoids the device by successfully changing its direction of movement, or by successfully evading any moving parts of the device. Oak Ridge National Laboratory (ORNL) has been funded by the US Department of Energy (DOE) Waterpower Program to evaluate strike potential and consequences for Marine and Hydrokinetic (MHK) technologies in rivers and estuaries of the United States. We will use both predictive models and laboratory/field experiments to evaluate the likelihood and consequences of strike at HK projects in rivers. Efforts undertaken at ORNL address three objectives: (1) Assess strike risk for marine and freshwater organisms; (2) Develop experimental procedures to assess the risk and consequences of strike; and (3) Conduct strike studies in experimental flumes and field installations of hydrokinetic devices. During the first year of the study ORNL collected information from the Federal Energy Regulatory Commission (FERC) MHK database about geographical distribution of proposed hydrokinetic projects (what rivers or other types of systems), HK turbine design (horizontal axis, vertical axis, other), description of proposed axial turbine (number of blades, size of blades, rotation rate, mitigation measures), and number of units per project. Where site specific information was available, we compared the location of proposed projects rotors within the channel (e.g., along cutting edge bank, middle of thalweg, near bottom or in midwater) to the general locations of fish in the river (shoreline,

Schweizer, Peter E [ORNL; Cada, Glenn F [ORNL; Bevelhimer, Mark S [ORNL

2010-05-01T23:59:59.000Z

80

Wave Energy Technologies Inc | Open Energy Information  

Open Energy Info (EERE)

Inc Jump to: navigation, search Name Wave Energy Technologies Inc Address 270 Sandy Cove Rd Place Ketch Harbour Zip B3V 1K9 Sector Marine and Hydrokinetic Website http:...

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Preliminary Screening Analysis for the Environmental Risk Evaluation System: Task 2.1.1: Evaluating Effects of Stressors – Fiscal Year 2010 Progress Report: Environmental Effects of Marine and Hydrokinetic Energy  

Science Conference Proceedings (OSTI)

Possible environmental effects of marine and hydrokinetic (MHK) energy development are not well understood, and yet regulatory agencies are required to make decisions in spite of substantial uncertainty about environmental impacts and their long-term effects. An understanding of risk associated with likely interactions between MHK installations and aquatic receptors, including animals, habitats, and ecosystems, can help reduce the level of uncertainty and focus regulatory actions and scientific studies on interactions of most concern. As a first step in developing the Pacific Northwest National Laboratory (PNNL) Environmental Risk Evaluation System (ERES), PNNL scientists conducted a preliminary risk screening analysis on three initial MHK cases - a tidal project in Puget Sound using Open Hydro turbines, a wave project off the coast of Oregon using Ocean Power Technologies point attenuator buoys, and a riverine current project in the Mississippi River using Free Flow turbines. Through an iterative process, the screening analysis revealed that top-tier stressors in all three cases were the effects of the dynamic physical presence of the device (e.g., strike), accidents, and effects of the static physical presence of the device (e.g., habitat alteration). Receptor interactions with these stressors at the four highest tiers of risk were dominated by marine mammals (cetaceans and pinnipeds) and birds (diving and non-diving); only the riverine case (Free Flow) included different receptors in the third tier (fish) and the fourth tier (benthic invertebrates). Although this screening analysis provides a preliminary analysis of vulnerability of environmental receptors to stressors associated with MHK installations, probability analysis, especially of risk associated with chemical toxicity and accidents such as oil spills or lost gear, will be necessary to further understand high-priority risks. Subject matter expert review of this process and results is required and is planned for the first quarter of FY11. Once expert review is finalized, the screening analysis phase of ERES will be complete.

Anderson, Richard M.; Copping, Andrea E.; Van Cleve, Frances B.

2010-11-15T23:59:59.000Z

82

Assessing the Effects of Marine and Hydrokinetic Energy Development on Marine and Estuarine Resources  

SciTech Connect

The world’s oceans and estuaries offer an enormous potential to meet the nation’s growing demand for energy. The use of marine and hydrokinetic (MHK) devices to harness the power of wave and tidal energy could contribute significantly toward meeting federal- and state-mandated renewable energy goals while supplying a substantial amount of clean energy to coastal communities. Locations along the eastern and western coasts of the United States between 40° and 70° north latitude are ideal for MHK deployment, and recent estimates of energy potential for the coasts of Washington, Oregon, and California suggest that up to 25 gigawatts could be generated from wave and tidal devices in these areas. Because energy derived from wave and tidal devices is highly predictable, their inclusion in our energy portfolio could help balance available sources of energy production, including hydroelectric, coal, nuclear, wind, solar, geothermal, and others.

Ward, Jeffrey A.; Schultz, Irvin R.; Woodruff, Dana L.; Roesijadi, Guritno; Copping, Andrea E.

2010-07-30T23:59:59.000Z

83

Abrasion Testing of Critical Components of Hydrokinetic Devices  

SciTech Connect

The objective of the Abrasion Testing of Critical Components of Hydrokinetic Devices (Project) was to test critical components of hydrokinetic devices in waters with high levels of suspended sediment – information that is widely applicable to the hydrokinetic industry. Tidal and river sites in Alaska typically have high suspended sediment concentrations. High suspended sediment also occurs in major rivers and estuaries throughout the world and throughout high latitude locations where glacial inputs introduce silt into water bodies. In assessing the vulnerability of technology components to sediment induced abrasion, one of the greatest concerns is the impact that the sediment may have on device components such as bearings and seals, failures of which could lead to both efficiency loss and catastrophic system failures.

Worthington, Monty [ORPC Alaska] [ORPC Alaska; Ali, Muhammad [Ohio University] [Ohio University; Ravens, Tom [University of Alaska Anchorage] [University of Alaska Anchorage

2013-12-06T23:59:59.000Z

84

Assessment and Mapping of the Riverine Hydrokinetic Resource in the  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Assessment and Mapping of the Riverine Hydrokinetic Resource in the Continental United States Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Assessment and Mapping of the Riverine Hydrokinetic Resource in the Continental United States Abstract This report describes the methodology and results of the most rigorous assessment to date of the riverine hydrokinetic energy resource in the contiguous 48 states and Alaska, excluding tidal waters. The assessment provides estimates of the gross, naturally available resource, termed the

85

Gulf Stream Trajectories Measured with Free-Drifting Buoys  

Science Conference Proceedings (OSTI)

During 1975–78, 35 free-drifting buoys measured surface currents in the Gulf Stream region. The buoy trajectories trace numerous paths of the Stream and show that the Stream is strongly influenced by the New England Seamounts. This influence is ...

P. L. Richardson

1981-07-01T23:59:59.000Z

86

Ocean Wave Wind Energy Ltd OWWE | Open Energy Information  

Open Energy Info (EERE)

Wind Energy Ltd OWWE Jump to: navigation, search Name Ocean Wave Wind Energy Ltd OWWE Sector Marine and Hydrokinetic Website http:www.owwe.net Region Norway LinkedIn Connections...

87

Multnomah County Hydrokinetic Feasibility Study: Final Feasibility Study Report  

Science Conference Proceedings (OSTI)

HDR has completed a study of the technical, regulatory, and economic feasibility of installing hydrokinetic turbines under the Morrison, Broadway, and Sellwood bridges. The primary objective of installing hydrokinetic turbines is a demonstration of in-stream hydrokinetic technologies for public education and outreach. Due to the low gradient of the Lower Willamette and the effects of the tide, velocities in the area in consideration are simply not high enough to economically support a commercial installation. While the velocities in the river may at times provide enough energy for a commercial turbine to reach capacity, the frequency and duration of high flow events which provide suitable velocities is not sufficient to support a commercial hydrokinetic installation. We have observed that over an 11 year period, daily average velocities in the Lower Willamette exceeded a nominal cut-in speed of 0.75 m/s only 20% of the time, leaving net zero power production for the remaining 80% of days. The Sellwood Bridge site was estimated to have the best hydrokinetic resource, with an estimated average annual production of about 9,000 kWh. The estimated production could range from 2,500 kWh to 15,000 kWh. Based on these energy estimates, the amount of revenue generated through either a power purchase agreement (PPA) or recovered through net metering is not sufficient to repay the project costs within the life of the turbine. The hydrokinetic resource at the Morrison and Broadway Bridges is slightly smaller than at the Sellwood Bridge. While the Broadway and Morrison Bridges have existing infrastructure that could be utilized, the project is not expected to generate enough revenue to repay the investment. Despite low velocities and energy production, the sites themselves are favorable for installation of a demonstration or experimental project. With high public interest in renewable energy, the possibility exists to develop a hydrokinetic test site which could provide developers and scientists a location to temporarily deploy and test hydrokinetic devices, and also function as an educational tool for the general public. Bridge piers provide an excellent pre-existing anchor point for hydrokinetic devices, and existing infrastructure at the Morrison and Broadway Bridges may reduce installation costs. Opportunity exists to partner with local universities with engineering and environmental interest in renewable energy. A partnership with Portland State University�¢����s engineering school could provide students with an opportunity to learn about hydrokinetics through senior design projects. Oregon State University and University of Washington, which are partnered through the Northwest National Marine Renewable Energy Center (NNMREC) to study and test hydrokinetic technology, are also relatively local to the site. In addition to providing an opportunity for both public and private entities to learn technically about in-stream kinetics, this approach will encourage grant funding for outreach, education, and product development, while also serving as a positive community relations opportunity for the County and its partners.

Stephen Spain

2012-03-15T23:59:59.000Z

88

Identifying How Marine and Hydrokinetic Devices Affect Aquatic Environments  

Science Conference Proceedings (OSTI)

Significant research is under way to determine the potential environmental effects of marine and hydrokinetic energy systems. This research, being guided and funded by the U.S. Department of Energy, is intended to address knowledge gaps and facilitate installation and operation of these systems.

Cada, G. F.; Copping, Andrea E.; Roberts, Jesse

2011-04-24T23:59:59.000Z

89

Evaluation of Sea Surface Temperature Measurements from Drifting Buoys  

Science Conference Proceedings (OSTI)

Three drift-buoy designs have been deployed since 1988 in substantial numbers in the tropical Pacific Ocean by United States participants as part of the Tropical Ocean Global Atmosphere (TOGA) Pan Pacific Surface Current Study. These include the ...

David S. Bitterman; Donald V. Hansen

1993-02-01T23:59:59.000Z

90

The IMET (Improved Meteorology) Ship and Buoy Systems  

Science Conference Proceedings (OSTI)

The recently developed IMET (improved meteorology) system for ships and buoys and the key elements of the program that led to its development are described. The system improves the ability to measure mean meteorological variables, including wind ...

David S. Hosom; Robert A. Weller; Richard E. Payne; Kenneth E. Prada

1995-06-01T23:59:59.000Z

91

Accelerations in Steep Gravity Waves  

Science Conference Proceedings (OSTI)

Surface accelerations can be measured in at least two ways: 1) by a fixed vertical wave guage, 2) by a free-floating buoy. This gives rise to two different vertical accelerations, called respectively “apparent” and “real”, or Langrangian. This ...

M. S. Longuet-Higgins

1985-11-01T23:59:59.000Z

92

MHK Projects/Piscataqua Tidal Hydrokinetic Energy Project | Open Energy  

Open Energy Info (EERE)

Piscataqua Tidal Hydrokinetic Energy Project Piscataqua Tidal Hydrokinetic 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":43.1055,"lon":-70.7912,"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":""}]}

93

MHK Projects/Passamaquoddy Tribe Hydrokinetic Project | Open Energy  

Open Energy Info (EERE)

Passamaquoddy Tribe Hydrokinetic Project Passamaquoddy Tribe Hydrokinetic 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":45.0234,"lon":-67.0672,"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":""}]}

94

MHK Projects/Atchafalaya River Hydrokinetic Project II | Open Energy  

Open Energy Info (EERE)

Atchafalaya River Hydrokinetic Project II Atchafalaya River Hydrokinetic Project II < 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":30.9828,"lon":-91.7994,"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":""}]}

95

MHK Projects/Sakonnet River Hydrokinetic Project | Open Energy Information  

Open Energy Info (EERE)

Sakonnet River Hydrokinetic Project Sakonnet River Hydrokinetic 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":41.6224,"lon":-71.2153,"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":""}]}

96

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

97

MHK Technologies/Hydrokinetic Power Barge | Open Energy Information  

Open Energy Info (EERE)

Power Barge Power Barge < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Hydrokinetic Power Barge.jpg Technology Profile Primary Organization Onsite Recovered Energy LP 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 Vurbine proprietary technology design and assembly mounted on a horizontal shaft on a twin hull pontoon or barge CAT or SWATH combines reaction and impulse technologies which can efficiently harvest hydrokinetic energy from flowing water in a low impact application Technology Dimensions Device Testing Date Submitted 36:51.7 << Return to the MHK database homepage

98

Hydro-kinetic approach to relativistic heavy ion collisions  

E-Print Network (OSTI)

We develop a combined hydro-kinetic approach which incorporates hydrodynamical expansion of the systems formed in \\textit{A}+\\textit{A} collisions and their dynamical decoupling described by escape probabilities. The method corresponds to a generalized relaxation time ($\\tau_{\\text{rel}}$) approximation for Boltzmann equation applied to inhomogeneous expanding systems; at small $\\tau_{\\text{rel}}$ it also allows one to catch the viscous effects in hadronic component - hadron-resonance gas. We demonstrate how the approximation of sudden freeze-out can be obtained within this dynamical picture of continuous emission and find that hypersurfaces, corresponding to sharp freeze-out limit, are momentum dependent. The pion $m_{T}$ spectra are computed in the developed hydro-kinetic model, and compared with those obtained from ideal hydrodynamics with the Cooper-Frye isothermal prescription. Our results indicate that there does not exist a universal freeze-out temperature for pions with different momenta, and support ...

Akkelin, S V; Karpenko, Iu A; Sinyukov, Yu M

2008-01-01T23:59:59.000Z

99

MHK Projects/Yukon River Hydrokinetic Turbine Project | Open Energy  

Open Energy Info (EERE)

Yukon River Hydrokinetic Turbine Project Yukon River Hydrokinetic Turbine 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":64.7883,"lon":-141.198,"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":""}]}

100

Marine and Hydrokinetic Technology Readiness Level | Open Energy  

Open Energy Info (EERE)

Marine and Hydrokinetic Technology Readiness Level Marine and Hydrokinetic Technology Readiness Level Jump to: navigation, search << Return to the MHK database homepage This field indicates the stage of development/deployment that technologies, which are undergoing partial or full-scale device testing, are currently in. Contents 1 TRL 1-3: Discovery / Concept Definition / Early Stage Development, Design, and Engineering 2 TRL 4: Proof of Concept 3 TRL 5/6: System Integration and Technology Laboratory Demonstration 4 TRL 7/8: Open Water System Testing, Demonstration, and Operation 5 TRL 9: Commercial-Scale Production / Application TRL 1-3: Discovery / Concept Definition / Early Stage Development, Design, and Engineering The purpose of this stage is to evaluate, to the largest extent possible, the scientific or technical merit and feasibility of ideas that appear to

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

The Surface Wave Environment In the GATE B/C Scale—Phase III  

Science Conference Proceedings (OSTI)

The surface wave environment in the GATE B/C scale is described from wave measurements made from buoys and aircraft during Phase III (September 1974). Particular emphasis is given to the wave measurements made from the pitch-roll buoy deployed in ...

V. Cardone; H. Carlson; J. A. Ewing; K. Hasselmann; S. Lazanoff; W. McLeish; D. Ross

1981-09-01T23:59:59.000Z

102

Department of Energy Awards $37 Million for Marine and Hydrokinetic Energy  

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

$37 Million for Marine and Hydrokinetic $37 Million for Marine and Hydrokinetic Energy Technology Development Department of Energy Awards $37 Million for Marine and Hydrokinetic Energy Technology Development September 9, 2010 - 12:00am Addthis Washington, DC - U.S. Energy Secretary Steven Chu today announced selections for more than $37 million in funding to accelerate the technological and commercial readiness of emerging marine and hydrokinetic (MHK) technologies, which seek to generate renewable electricity from the nation's oceans and free-flowing rivers and streams. The 27 projects range from concept studies and component design research to prototype development and in-water device testing. This unprecedented level of funding will advance the ability of marine and hydrokinetic energy technologies to

103

Department of Energy Awards $37 Million for Marine and Hydrokinetic Energy  

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

Department of Energy Awards $37 Million for Marine and Hydrokinetic Department of Energy Awards $37 Million for Marine and Hydrokinetic Energy Technology Development Department of Energy Awards $37 Million for Marine and Hydrokinetic Energy Technology Development September 9, 2010 - 12:00am Addthis Washington, DC - U.S. Energy Secretary Steven Chu today announced selections for more than $37 million in funding to accelerate the technological and commercial readiness of emerging marine and hydrokinetic (MHK) technologies, which seek to generate renewable electricity from the nation's oceans and free-flowing rivers and streams. The 27 projects range from concept studies and component design research to prototype development and in-water device testing. This unprecedented level of funding will advance the ability of marine and hydrokinetic energy technologies to

104

Remote Monitoring of the Structural Health of Hydrokinetic Composite Turbine Blades  

Science Conference Proceedings (OSTI)

A health monitoring approach is investigated for hydrokinetic turbine blade applications. In-service monitoring is critical due to the difficult environment for blade inspection and the cost of inspection downtime. Composite blade designs have advantages that include long life in marine environments and great control over mechanical properties. Experimental strain characteristics are determined for static loads and free-vibration loads. These experiments are designed to simulate the dynamic characteristics of hydrokinetic turbine blades. Carbon/epoxy symmetric composite laminates are manufactured using an autoclave process. Four-layer composite beams, eight-layer composite beams, and two-dimensional eight-layer composite blades are instrumented for strain. Experimental results for strain measurements from electrical resistance gages are validated with theoretical characteristics obtained from in-house finite-element analysis for all sample cases. These preliminary tests on the composite samples show good correlation between experimental and finite-element strain results. A health monitoring system is proposed in which damage to a composite structure, e.g. delamination and fiber breakage, causes changes in the strain signature behavior. The system is based on embedded strain sensors and embedded motes in which strain information is demodulated for wireless transmission. In-service monitoring is critical due to the difficult environment for blade inspection and the cost of inspection downtime. Composite blade designs provide a medium for embedding sensors into the blades for in-situ health monitoring. The major challenge with in-situ health monitoring is transmission of sensor signals from the remote rotating reference frame of the blade to the system monitoring station. In the presented work, a novel system for relaying in-situ blade health measurements in hydrokinetic systems is described and demonstrated. An ultrasonic communication system is used to transmit sensor data underwater from the rotating frame of the blade to a fixed relay station. Data are then broadcast via radio waves to a remote monitoring station. Results indicate that the assembled system can transmit simulated sensor data with an accuracy of ±5% at a maximum sampling rate of 500 samples/sec. A power investigation of the transmitter within the blade shows that continuous max-sampling operation is only possible for short durations (~days), and is limited due to the capacity of the battery power source. However, intermittent sampling, with long periods between samples, allows for the system to last for very long durations (~years). Finally, because the data transmission system can operate at a high sampling rate for short durations or at a lower sampling rate/higher duty cycle for long durations, it is well-suited for short-term prototype and environmental testing, as well as long-term commercially-deployed hydrokinetic machines.

J.L. Rovey K. Chandrashekhara

2012-09-21T23:59:59.000Z

105

Long Period Swell Wave Events on the Norwegian Shelf  

Science Conference Proceedings (OSTI)

Wave records obtained by Waverider and heave/pitch/roll data buoys on the Norwegian continental shelf have been analysed in order to gain information on spectral characteristics (bandwidth, peak frequency, significant wave height and direction) ...

B. Gjevik; O. Rygg; H. E. Krogstad; A. Lygre

1988-05-01T23:59:59.000Z

106

The Fleet Numerical Oceanography Center Global Spectral Ocean Wave Model  

Science Conference Proceedings (OSTI)

The Spectral Ocean Wave Model (SOWM) has been an operational product at Fleet Numerical Oceanography Center since the mid 1970s; the Global Spectral Ocean Wave Model (GSOWM) was developed to replace it. An operational test of GSOWM, using buoy, ...

R. M. Clancy; J. E. Kaitala; L. F. Zambresky

1986-05-01T23:59:59.000Z

107

Radiative Heating Errors in Naturally Ventilated Air Temperature Measurements Made from Buoys*  

Science Conference Proceedings (OSTI)

Solar radiative heating errors in buoy-mounted, naturally ventilated air temperature sensors are examined. Data from sensors with multiplate radiation shields and collocated, fan-aspirated air temperature sensors from three buoy deployments ...

Steven P. Anderson; Mark F. Baumgartner

1998-02-01T23:59:59.000Z

108

Technology, Design, and Operation of an Autonomous Buoy System in the Western English Channel  

Science Conference Proceedings (OSTI)

A buoy system has been developed to continually monitor the operationally demanding coastal and open-shelf environment of the western English Channel. The buoys measure a range of physical and biogeochemical parameters on an hourly basis at two ...

T. J. Smyth; J. R. Fishwick; C. P. Gallienne; J. A. Stephens; A. J. Bale

2010-12-01T23:59:59.000Z

109

JEDI Marine and Hydrokinetic Model: User Reference Guide  

SciTech Connect

The Jobs and Economic Development Impact Model (JEDI) for Marine and Hydrokinetics (MHK) is a user-friendly spreadsheet-based tool designed to demonstrate the economic impacts associated with developing and operating MHK power systems in the United States. The JEDI MHK User Reference Guide was developed to assist users in using and understanding the model. This guide provides information on the model's underlying methodology, as well as the sources and parameters used to develop the cost data utilized in the model. This guide also provides basic instruction on model add-in features, operation of the model, and a discussion of how the results should be interpreted.

Goldberg, M.; Previsic, M.

2011-04-01T23:59:59.000Z

110

2011 Marine and Hydrokinetic Device Modeling Workshop: Final Report  

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

PROGRAM PROGRAM ďż˝ 2011 Marine Hydrokinetic Device Modeling Workshop: Final Report March 1, 2011 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation,

111

Template:Marine and Hydrokinetic Technology | Open Energy Information  

Open Energy Info (EERE)

Technology Technology Jump to: navigation, search This is the Marine and Hydrokinetic Technology template. It is designed for use by MHK Technologies Pages. To define an MHK Technology, please use this form. Parameters Image - Associated image file. (optional) Primary Organization - Field def missing! Project(s) where this technology is utilized - Field def missing! Technology Resource - Field def missing! Technology Type - Field def missing! Technology Readiness Level - Field def missing! Technology Description - Field def missing! Designed to Operate with Shore Connection - Field def missing! Power Transfer Method - Field def missing! Water Column Location - Field def missing! Mooring Configuration - Field def missing! Optimum Marine/Riverline Conditions - Field def missing!

112

JEDI Marine and Hydrokinetic Model: User Reference Guide  

SciTech Connect

The Jobs and Economic Development Impact Model (JEDI) for Marine and Hydrokinetics (MHK) is a user-friendly spreadsheet-based tool designed to demonstrate the economic impacts associated with developing and operating MHK power systems in the United States. The JEDI MHK User Reference Guide was developed to assist users in using and understanding the model. This guide provides information on the model's underlying methodology, as well as the sources and parameters used to develop the cost data utilized in the model. This guide also provides basic instruction on model add-in features, operation of the model, and a discussion of how the results should be interpreted.

Goldberg, M.; Previsic, M.

2011-04-01T23:59:59.000Z

113

Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental Shelf  

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

the Interior the Interior Bureau of Ocean Energy Management Office of Renewable Energy Programs OCS EIS/EA BOEM 2013-01140 Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental Shelf Offshore Florida Revised Environmental Assessment OCS EIS/EA BOEM 2013-01140 Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental Shelf Offshore Florida Revised Environmental Assessment Author Bureau of Ocean Energy Management Office of Renewable Energy Programs Published by U.S. Department of the Interior Bureau of Ocean Energy Management Office of Renewable Energy Programs August 2013 iii FINDING OF NO SIGNIIFCANT IMPACT Lease Issuance for Marine Hydrokinetic Technology Testing on the Outer Continental

114

Hydro-kinetic approach to relativistic heavy ion collisions  

E-Print Network (OSTI)

We develop a combined hydro-kinetic approach which incorporates a hydrodynamical expansion of the systems formed in \\textit{A}+\\textit{A} collisions and their dynamical decoupling described by escape probabilities. The method corresponds to a generalized relaxation time ($\\tau_{\\text{rel}}$) approximation for the Boltzmann equation applied to inhomogeneous expanding systems; at small $\\tau_{\\text{rel}}$ it also allows one to catch the viscous effects in hadronic component - hadron-resonance gas. We demonstrate how the approximation of sudden freeze-out can be obtained within this dynamical picture of continuous emission and find that hypersurfaces, corresponding to a sharp freeze-out limit, are momentum dependent. The pion $m_{T}$ spectra are computed in the developed hydro-kinetic model, and compared with those obtained from ideal hydrodynamics with the Cooper-Frye isothermal prescription. Our results indicate that there does not exist a universal freeze-out temperature for pions with different momenta, and support an earlier decoupling of higher $p_{T}$ particles. By performing numerical simulations for various initial conditions and equations of state we identify several characteristic features of the bulk QCD matter evolution preferred in view of the current analysis of heavy ion collisions at RHIC energies.

S. V. Akkelin; Y. Hama; Iu. A. Karpenko; Yu. M. Sinyukov

2008-04-25T23:59:59.000Z

115

Marine Hydrokinetic Turbine Power-Take-Off Design for Optimal Performance and Low Impact on Cost-of-Energy: Preprint  

SciTech Connect

Marine hydrokinetic devices are becoming a popular method for generating marine renewable energy worldwide. These devices generate electricity by converting the kinetic energy of moving water, wave motion or currents, into electrical energy through the use of a power-take-off (PTO) system. Most PTO systems incorporate a mechanical or hydraulic drivetrain, power generator, and electric control/conditioning system to deliver the generated electric power to the grid at the required state. Like wind turbine applications, the PTO system must be designed for high reliability, good efficiency, and long service life with reasonable maintenance requirements, low cost, and an appropriate mechanical design for anticipated applied steady and unsteady loads. The ultimate goal of a PTO design is high efficiency and low maintenance and cost, with a low impact on the device cost-of-energy (CoE).

Beam, M.; Kline, B.; Elbing, B.; Straka, W.; Fontaine, A.; Lawson, M.; Li, Y.; Thresher, R.; Previsic, M.

2013-02-01T23:59:59.000Z

116

Marine Hydrokinetic Turbine Power-Take-Off Design for Optimal Performance and Low Impact on Cost-of-Energy: Preprint  

DOE Green Energy (OSTI)

Marine hydrokinetic devices are becoming a popular method for generating marine renewable energy worldwide. These devices generate electricity by converting the kinetic energy of moving water, wave motion or currents, into electrical energy through the use of a Power-Take-Off (PTO) system. Most PTO systems incorporate a mechanical or hydraulic drive train, power generator and electric control/conditioning system to deliver the generated electric power to the grid at the required state. Like wind turbine applications, the PTO system must be designed for high reliability, good efficiency, and long service life with reasonable maintenance requirements, low cost and an appropriate mechanical design for anticipated applied steady and unsteady loads. The ultimate goal of a PTO design is high efficiency, low maintenance and cost with a low impact on the device Cost-of-Energy (CoE).

Beam, M.; Kline, B.; Elbing, B.; Straka, W.; Fontaine, A.; Lawson, M.; Li, Y.; Thresher, R.; Previsic, M.

2012-04-01T23:59:59.000Z

117

Fish Passage Through Turbines: Application of Conventional Hydropower Data to Hydrokinetic Technologies  

Science Conference Proceedings (OSTI)

The potential for fish populations to be negatively impacted by hydrokinetic turbines is a major issue associated with the development and licensing of this type of renewable energy source. Such impacts may include habitat alteration, disruptions in migrations and movements, and injury and mortality to fish that encounter turbines. In particular, there is considerable concern for fish and other aquatic organisms to interact with hydrokinetic turbines in a manner that could lead to alterations in normal b...

2011-10-31T23:59:59.000Z

118

MHK Projects/OE Buoy OE 30 | Open Energy Information  

Open Energy Info (EERE)

OE Buoy OE 30 OE Buoy OE 30 < 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":38.8037,"lon":-124.76,"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":""}]}

119

Marine and Hydrokinetic Energy Development Technical Support and General Environmental Studies Report on Outreach to Stakeholders for Fiscal Year 2009  

DOE Green Energy (OSTI)

Report on activities working with stakeholders in the emerging marine and hydrokinetic energy industry during FY09, for DOE EERE Office of Waterpower.

Copping, Andrea E.; Geerlofs, Simon H.

2010-01-22T23:59:59.000Z

120

THORs Power Method for Hydrokinetic Devices - Final Report  

DOE Green Energy (OSTI)

Ocean current energy represents a vast untapped source of renewable energy that exists on the outer continental shelf areas of the 5 major continents. Ocean currents are unidirectional in nature and are perpetuated by thermal and salinity sea gradients, as well as coriolis forces imparted from the earth's rotation. This report details THORs Power Method, a breakthrough power control method that can provide dramatic increases to the capacity factor over and above existing marine hydrokinetic (MHK) devices employed in the extraction of energy from ocean currents. THORs Power Method represents a constant speed, variable depth operational method that continually locates the ocean current turbine at a depth at which the rated power of the generator is routinely achieved. Variable depth operation is achieved by using various vertical force effectors, including ballast tanks for variable weight, a hydrodynamic wing for variable lift or down force and drag flaps for variable vehicle drag forces.

J. Turner Hunt; Joel Rumker

2012-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Simulating Collisions for Hydrokinetic Turbines. FY2010 Annual Progress Report.  

DOE Green Energy (OSTI)

Computational fluid dynamics (CFD) simulations of turbulent flow and particle motion are being conducted to evaluate the frequency and severity of collisions between marine and hydrokinetic (MHK) energy devices and debris or aquatic organisms. The work is part of a collaborative research project between Pacific Northwest National Laboratory (PNNL) and Sandia National Laboratories , funded by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Wind and Water Power Program. During FY2010 a reference design for an axial flow MHK turbine was used to develop a computational geometry for inclusion into a CFD model. Unsteady simulations of turbulent flow and the moving MHK turbine blades are being performed and the results used for simulation of particle trajectories. Preliminary results and plans for future work are presented.

Richmond, Marshall C.; Rakowski, Cynthia L.; Perkins, William A.; Serkowski, John A.

2010-11-30T23:59:59.000Z

122

Carnegie Wave Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Carnegie Wave Energy Limited Carnegie Wave Energy Limited Jump to: navigation, search Name Carnegie Wave Energy Limited Address 1 124 Stirling Highway Place North Fremantle Zip 6159 Sector Marine and Hydrokinetic Year founded 1993 Number of employees 25 Website http://www.carnegiewave.com Region Australia 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: CETO La Reunion CETO3 Garden Island Perth Wave Energy Project PWEP This company is involved in the following MHK Technologies: CETO Wave Energy Technology This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=Carnegie_Wave_Energy_Limited&oldid=678263

123

Navy Catching Waves in Hawaii | Department of Energy  

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

Navy Catching Waves in Hawaii Navy Catching Waves in Hawaii Navy Catching Waves in Hawaii June 2, 2010 - 11:56am Addthis This experimental power-generating buoy installed off the coast of Oahu can produce enough energy to power 25 homes under optimal conditions. | Photo courtesy of Ocean Power Technologies, Inc. This experimental power-generating buoy installed off the coast of Oahu can produce enough energy to power 25 homes under optimal conditions. | Photo courtesy of Ocean Power Technologies, Inc. To a casual observer, the buoy off the shore of Marine Corps Base Hawaii (MCBH) might look like nothing more than a bright yellow spot in a blue ocean. But this isn't an ordinary buoy - it's a small electrical generator, creating renewable electricity as it bobs up and down on the waves. It's also a test project by the U.S. Navy to see whether a wider

124

Observations of Persistent Mixing and Near-Inertial Internal Waves  

Science Conference Proceedings (OSTI)

Repeated profiles of microstructure and shear alongside a drogued buoy show a 10 m thick mixing zone at the same depth as a near-inertial feature. Because the profile was diffusively stable and free of thermohaline intrusions, internal wave ...

M. C. Gregg; E. A. D'Asaro; T. J. Shay; N. Larson

1986-05-01T23:59:59.000Z

125

Long-Term Observations of Tropical Instability Waves  

Science Conference Proceedings (OSTI)

Reynolds sea surface temperature (SST) data showing tropical instability waves (TIWs) in the tropical Pacific are analyzed along with current measurements from the Tropical Atmosphere–Ocean (TAO) buoy array and wind speeds from the European ...

Robert F. Contreras

2002-09-01T23:59:59.000Z

126

Observations of the Response of Sea Waves to Veering Winds  

Science Conference Proceedings (OSTI)

A data-adaptive technique, the iterative maximum likelihood method, is used to estimate directional wave spectra from data collected by three pitch-and-roll buoys, during two turning wind events of the CASP 86 experiment. A relaxation coefficient ...

Diane Masson

1990-12-01T23:59:59.000Z

127

Signal Sampling Impacts on HF Radar Wave Measurement  

Science Conference Proceedings (OSTI)

Averaging is required for the measurement of ocean surface wave spectra and parameters with any measurement system in order to reduce the variance in the estimates. Sampling theory for buoy measurements is well known. The same theory can be ...

Lucy R. Wyatt; J. Jim Green; Andrew Middleditch

2009-04-01T23:59:59.000Z

128

Wave Power Demonstration Project at Reedsport, Oregon  

SciTech Connect

Ocean wave power can be a significant source of large?scale, renewable energy for the US electrical grid. The Electrical Power Research Institute (EPRI) conservatively estimated that 20% of all US electricity could be generated by wave energy. Ocean Power Technologies, Inc. (OPT), with funding from private sources and the US Navy, developed the PowerBuoy? to generate renewable energy from the readily available power in ocean waves. OPT's PowerBuoy converts the energy in ocean waves to electricity using the rise and fall of waves to move the buoy up and down (mechanical stroking) which drives an electric generator. This electricity is then conditioned and transmitted ashore as high?voltage power via underwater cable. OPT's wave power generation system includes sophisticated techniques to automatically tune the system for efficient conversion of random wave energy into low cost green electricity, for disconnecting the system in large waves for hardware safety and protection, and for automatically restoring operation when wave conditions normalize. As the first utility scale wave power project in the US, the Wave Power Demonstration Project at Reedsport, OR, will consist of 10 PowerBuoys located 2.5 miles off the coast. This U.S. Department of Energy Grant funding along with funding from PNGC Power, an Oregon?based electric power cooperative, was utilized for the design completion, fabrication, assembly and factory testing of the first PowerBuoy for the Reedsport project. At this time, the design and fabrication of this first PowerBuoy and factory testing of the power take?off subsystem are complete; additionally the power take?off subsystem has been successfully integrated into the spar.

Mekhiche, Mike [Principal Investigator] [Principal Investigator; Downie, Bruce [Project Manager] [Project Manager

2013-10-21T23:59:59.000Z

129

Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop  

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

Marine and Hydrokinetic Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop W. Musial, M. Lawson, and S. Rooney National Renewable Energy Laboratory Technical Report NREL/TP-5000-57605 February 2013 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop W. Musial, M. Lawson, and S. Rooney National Renewable Energy Laboratory Prepared under Task No. WA09.3406

130

Variations of Sensible and Latent Heat Fluxes from a Great Lakes Buoy and Associated Synoptic Weather Patterns  

Science Conference Proceedings (OSTI)

An investigation of sensible and latent heat fluxes and their relation to synoptic weather events was performed using hourly meteorological measurements from National Data Buoy Center buoy 45003, located in northern Lake Huron, during April–...

Neil F. Laird; David A. R. Kristovich

2002-02-01T23:59:59.000Z

131

Scaling properties of sea ice deformation from buoy dispersion P. Rampal,1,2  

E-Print Network (OSTI)

in a gas or two people in a crowd, two nearby pieces of sea ice gradually move apart and disperse [MartinScaling properties of sea ice deformation from buoy dispersion analysis P. Rampal,1,2 J. Weiss,1 D. The deformation is derived from the dispersion of pairs of drifting buoys, using the IABP (International Arctic

Lindsay, Ron

132

Hurricane Katrina Winds Measured by a Buoy-Mounted Sonic Anemometer  

Science Conference Proceedings (OSTI)

The eye of Hurricane Katrina passed within 49 n mi of an oceanographic observing system buoy in the Mississippi Bight that is part of the Central Gulf of Mexico Ocean Observing System. Although a mechanical anemometer failed on the buoy during ...

Stephan Howden; David Gilhousen; Norman Guinasso; John Walpert; Michael Sturgeon; Les Bender

2008-04-01T23:59:59.000Z

133

Obtaining Smooth Hydrographic Profiles from a Buoy Deployed in Sea Ice  

Science Conference Proceedings (OSTI)

SALARGOS buoys that measure upper-ocean temperature and salinity in ice-covered seas have been collecting data in the Arctic basin for several years. The buoys consist of a 300-m-long string of six temperature-conductivity sensors at fixed depths,...

Michael Steele; James H. Morison

1992-12-01T23:59:59.000Z

134

Semisubmersible LNG plant design uses concrete storage buoy  

SciTech Connect

The ARGE '76 consortium, which includes Bilfinger and Berger, Blohm and Voss A.G., Dyckerhoff and Widmann A.G., Kabelmetal, Linde A.G., and Preussag A.G., has designed a system for exploiting marginal-sized offshore gasfields comprising an LNG liquefaction plant on a steel semisubmersible, a complete transfer system, and a concrete LNG storage buoy with a capacity of 125,000 cu m. The plant can handle 15.36 million cu m/day of natural gas production using a modified mixed refrigerant cycle with precooling from four nearly identical lines of the same capacity. The semisubmersible deck is 124 m square and 12 m deep. Quarters would be built for 160 men. The plant can continue to operate up to an inclination of 5/sup 0/. The storage buoy features a 64 m dia spherical concrete storage tank surrounded by 20 cylindrical ballast tanks. A 10 m dia center column rising from the tank supports a steel deck 20 m above sea level and also houses the transfer and ballast pipes and pumps. A flexible length of Flexwell-LNG transfer pipes 700 m long connects the semisubmersible and the storage tank, which will be 600 m apart.

1978-02-01T23:59:59.000Z

135

WaveCatcher Inc | Open Energy Information  

Open Energy Info (EERE)

WaveCatcher Inc WaveCatcher Inc Jump to: navigation, search Name WaveCatcher Inc Address 2307 Robincrest Ln Sector Marine and Hydrokinetic Year founded 2006 Phone number 1-847-764-9106 LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=WaveCatcher_Inc&oldid=678511" Categories: Clean Energy Organizations Companies Organizations Stubs MHK Companies What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 1863326429 Varnish cache server

136

Direct Measurements of Current Shear in the Tropical Pacific Ocean and Its Effect on Drift Buoy Performance  

Science Conference Proceedings (OSTI)

Measurements of ocean surface currents derived from drift buoy trajectories are subject to errors caused by slippage of the buoy relative to the surrounding water. This slippage error is caused by a number of forces acting on the buoy and drogue ...

David S. Bitterman; Donald V. Hansen

1989-04-01T23:59:59.000Z

137

High-Height Long-Period Ocean Waves Generated by a Severe Storm in the Northeast Pacific Ocean during February 1983  

Science Conference Proceedings (OSTI)

Unusally severe storms occurred in the northeast Pacific Ocean between January and March 1983, and waves from these storms caused extensive erosion and damage along the U.S. west coast. Wave conditions as measured by eight data buoys are ...

Marshall D. Earle; Kathryn A. Bush; Glenn D. Hamilton

1984-08-01T23:59:59.000Z

138

Directional Validation of Wave Predictions  

Science Conference Proceedings (OSTI)

A methodology for quantitative, directional validation of a long-term wave model hindcast is described and applied. Buoy observations are used as ground truth and the method does not require the application of a parametric model or data-adaptive ...

W. Erick Rogers; David W. C. Wang

2007-03-01T23:59:59.000Z

139

Working Group Reports A Short-Wave Radiometer Array Across  

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

9 9 Working Group Reports A Short-Wave Radiometer Array Across the Tropical Pacific Ocean as a Component of the TOGA-TAO Buoy Array R. M. Reynolds Brookhaven National Laboratory Upton, New York Introduction The purpose of this document is to bring together pertinent information concerning the NOAA TOGA-TAO buoy array so that a decision can be made for the following questions: 1. Are the scientific gains from an array of short-wave radiation sensors in the equatorial Pacific Ocean sufficiently impelling that DOE/ARM should provide financial and material support to NOAA/PMEL to install and operate this array? 2. What scientists and/or scientific studies would directly benefit from such a data set? 3. What should that array look like? That is, what sub-set of buoys should be so implemented given the per-buoy

140

Airborne Measurements of Wave Growth for Stable and Unstable Atmospheres in Lake Michigan  

Science Conference Proceedings (OSTI)

This paper presents the results of a joint program combining airborne laser profilometer and Waverider buoy measurements of synoptic wave conditions in Lake Michigan during the passage of an intense cold front. Measurements were made both before ...

Paul C. Liu; Duncan B. Ross

1980-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

A Study of the Wavenumber Spectra of Short Water Waves in the Ocean  

Science Conference Proceedings (OSTI)

Spatial measurements of capillary-gravity waves in the ocean were obtained using a scanning slope sensor mounted on a free-drifting buoy intended to minimize the flow disturbance. The data provide direct calculation of the wavenumber spectra of ...

Paul A. Hwang; Serhad Atakturk; A. Sletten; Dennis B. Trizna

1996-07-01T23:59:59.000Z

142

The Signature of Inertial and Tidal Currents in Offshore Wave Records  

Science Conference Proceedings (OSTI)

The roughness of the sea surface can be affected by strong currents. Here, long records of surface wave heights from buoy observations in the northeastern Pacific Ocean are examined. The data show the influence of tidal currents, but the first ...

Johannes Gemmrich; Chris Garrett

2012-06-01T23:59:59.000Z

143

Factors Affecting Ship and Buoy Data Quality: A Data Assimilation Perspective  

Science Conference Proceedings (OSTI)

Ship and buoy reports of wind, air pressure, temperature, humidity, and sea temperature for 2007 and 2008 have been compared with values from the operational Met Office global numerical weather prediction (NWP) system. Ship reports have been ...

Bruce Ingleby

2010-09-01T23:59:59.000Z

144

The MR: a Meteorological Data Sensing, Recording and Telemetering Package for Use on Moored Buoys  

Science Conference Proceedings (OSTI)

A new meteorological sensing, recording, and telemetering package based on digital data processing techniques has been developed for long-term (6-month) deployments on surface buoys moored in the ocean. Data are recorded on magnetic cassette ...

Richard E. Payne

1988-04-01T23:59:59.000Z

145

Surface Heat Flux Variations across the Kuroshio Extension as Observed by Surface Flux Buoys  

Science Conference Proceedings (OSTI)

Wintertime sea surface heat flux variability across the Kuroshio Extension (KE) front is analyzed using data from the Kuroshio Extension Observatory (KEO) buoy in the Kuroshio recirculation gyre south of the KE front and from the Japan Agency for ...

Masanori Konda; Hiroshi Ichikawa; Hiroyuki Tomita; Meghan F. Cronin

2010-10-01T23:59:59.000Z

146

A Novel and Low-Cost Sea Ice Mass Balance Buoy  

Science Conference Proceedings (OSTI)

The understanding of sea ice mass balance processes requires continuous monitoring of the seasonal evolution of the ice thickness. While autonomous ice mass balance (IMB) buoys deployed over the past two decades have contributed to scientists' ...

Keith Jackson; Jeremy Wilkinson; Ted Maksym; David Meldrum; Justin Beckers; Christian Haas; David Mackenzie

2013-11-01T23:59:59.000Z

147

An Investigation of the Consistency of TAO–TRITON Buoy-Mounted Capacitance Rain Gauges  

Science Conference Proceedings (OSTI)

The common use of remotely located, buoy-mounted capacitance rain gauges in the tropical oceans for satellite rainfall verification studies provides motivation for an in situ gauge bias assessment. A comparison of the biases in rainfall catchment ...

Mark L. Morrissey; Howard J. Diamond; Michael J. McPhaden; H. Paul Freitag; J. Scott Greene

2012-06-01T23:59:59.000Z

148

Surface Circulation and Kinetic Energy Distributions in the Southern Hemisphere Oceans from FGGE Drifting Buoys  

Science Conference Proceedings (OSTI)

Trajectories of approximately 300 satellite-tracked drifting buoys deployed throughout the Southern Hemisphere oceans during the Fiat GARP Global Experiment (FGGE) have been analyzed to infer the mean surface circulation and kinetic energy ...

Steven L. Patterson

1985-07-01T23:59:59.000Z

149

Comparison of Four ERS-1 Scatterometer Wind Retrieval Algorithms with Buoy Measurements  

Science Conference Proceedings (OSTI)

Wind velocity retrievals from the ERS-1 scatterometer are compared with extensive high-quality hourly buoy winds using four different algorithms in two oceanic regions during 1994. The retrieved winds exhibit significantly different wind velocity ...

Clifford Rufenach

1998-02-01T23:59:59.000Z

150

Intercomparison of Aircraft and Surface Buoy Meteorological Data during CODE-1  

Science Conference Proceedings (OSTI)

Intercomparisons of meteorological data—wind speed and direction, surface temperature and surface pressure—were obtained for NCAR Queen Air overflights of four buoys during the CODE-1 experiment. The overflights were at a nominal altitude of 33 ...

Carl A. Friehe; Robert C. Beardsley; Clinton D. Winant; Jerome P. Dean

1984-03-01T23:59:59.000Z

151

Estimating Surface Divergence of Ocean Eddies Using Observed Trajectories from a Surface Drifting Buoy  

Science Conference Proceedings (OSTI)

A method is described that estimates the time evolution of surface divergence and other secondary circulation properties of an ocean eddy. The method is novel because it is applied to the observations of a single surface drifting buoy. Surface ...

Gary B. Brassington

2010-04-01T23:59:59.000Z

152

Scales of Variability in the Equatorial Pacific Inferred form Tropical Atmosphere-Ocean Buoy Array  

Science Conference Proceedings (OSTI)

The highly temporally resolved time series from the Tropical Atmosphere-Ocean moored buoy array are used to evaluate the scales of thermal variability in the upper equatorial Pacific. The TAO array consists of nearly 70 deep-ocean moorings ...

William S. Kessler; M. C. Spillane; Michael J. McPhaden; D. E. Harrison

1996-12-01T23:59:59.000Z

153

Environmental Effects of Hydrokinetic Turbines on Fish: Desktop and Laboratory Flume Studies  

SciTech Connect

This collection of three reports describes desktop and laboratory flume studies that provide information to support assessment of the potential for injury and mortality of fish that encounter hydrokinetic turbines of various designs installed in tidal and river environments. Behavioral responses to turbine exposure also are investigated to support assessment of the potential for disruptions to upstream and downstream movements of fish. The studies: (1) conducted an assessment of potential injury mechanisms using available data from studies with conventional hydro turbines; (2) developed theoretical models for predicting blade strike probabilities and mortality rates; and (3) performed flume testing with three turbine designs and several fish species and size groups in two laboratory flumes to estimate survival rates and document fish behavior. The project yielded three reports which this document comprises. The three constituent documents are addressed individually below Fish Passage Through Turbines: Application of Conventional Hydropower Data to Hydrokinetic Technologies Fish passing through the blade sweep of a hydrokinetic turbine experience a much less harsh physical environment than do fish entrained through conventional hydro turbines. The design and operation of conventional turbines results in high flow velocities, abrupt changes in flow direction, relatively high runner rotational and blade speeds, rapid and significant changes in pressure, and the need for various structures throughout the turbine passageway that can be impacted by fish. These conditions generally do not occur or are not significant factors for hydrokinetic turbines. Furthermore, compared to conventional hydro turbines, hydrokinetic turbines typically produce relatively minor changes in shear, turbulence, and pressure levels from ambient conditions in the surrounding environment. Injuries and mortality from mechanical injuries will be less as well, mainly due to low rotational speeds and strike velocities, and an absence of structures that can lead to grinding or abrasion injuries. Additional information is needed to rigorously assess the nature and magnitude of effects on individuals and populations, and to refine criteria for design of more fish-friendly hydrokinetic turbines. Evaluation of Fish Injury and Mortality Associated with Hydrokinetic Turbines Flume studies exposed fish to two hydrokinetic turbine designs to determine injury and survival rates and to assess behavioral responses. Also, a theoretical model developed for predicting strike probability and mortality of fish passing through conventional hydro turbines was adapted for use with hydrokinetic turbines and applied to the two designs evaluated during flume studies. The flume tests were conducted with the Lucid spherical turbine (LST), a Darrieus-type (cross flow) turbine, and the Welka UPG, an axial flow propeller turbine. Survival rates for rainbow trout tested with the LST were greater than 98% for both size groups and approach velocities evaluated. Turbine passage survival rates for rainbow trout and largemouth bass tested with the Welka UPG were greater than 99% for both size groups and velocities evaluated. Injury rates of turbine-exposed fish were low with both turbines and generally comparable to control fish. Video observations of the LST demonstrated active avoidance of turbine passage by a large proportion fish despite being released about 25 cm upstream of the turbine blade sweep. Video observations from behavior trials indicated few if any fish pass through the turbines when released farther upstream. The theoretical predictions for the LST indicated that strike mortality would begin to occur at an ambient current velocity of about 1.7 m/s for fish with lengths greater than the thickness of the leading edge of the blades. As current velocities increase above 1.7 m/s, survival was predicted to decrease for fish passing through the LST, but generally remained high (greater than 90%) for fish less than 200 mm in length. Strike mortality was not predicted to occur duri

Jacobson, Paul T. [Electric Power Research Institute; Amaral, Stephen V. [Alden Research Laboratory; Castro-Santos, Theodore [U.S. Geological Survey; Giza, Dan [Alden Research Laboratory; Haro, Alexander J. [U.S. Geological Survey; Hecker, George [Alden Research Laboratory; McMahon, Brian [Alden Research Laboratory; Perkins, Norman [Alden Research Laboratory; Pioppi, Nick [Alden Research Laboratory

2012-12-31T23:59:59.000Z

154

The Contribution of Environmental Siting and Permitting Requirements to the Cost of Energy for Marine and Hydrokinetic Devices  

Science Conference Proceedings (OSTI)

Responsible deployment of marine and hydrokinetic (MHK) devices in estuaries, coastal areas, and major rivers requires that biological resources and ecosystems be protected through siting and permitting (consenting) processes. Scoping appropriate deployment locations, collecting pre-installation (baseline) and post-installation data add to the cost of developing MHK projects, and hence to the cost of energy. Under the direction of the U.S. Department of Energy, Pacific Northwest National Laboratory scientists have developed logic models that describe studies and processes for environmental siting and permitting. Each study and environmental permitting process has been assigned a cost derived from existing and proposed tidal, wave, and riverine MHK projects. Costs have been developed at the pilot scale, and for commercial arrays. This work is carried out under the U.S. Department of Energy reference model project, with the costs for engineering, deployment strategies, mooring and anchoring configurations, and maintenance operations, being developed by a consortium of Department of Energy national laboratories and universities. The goal of the reference model is to assist the MHK industry to become a cost-competitive contributor of renewable energy, by identifying those aspects of MHK projects that contribute significantly to the cost of energy, and directing research funding towards lowering those costs.

Copping, Andrea E.; Geerlofs, Simon H.

2011-05-09T23:59:59.000Z

155

Marine and Hydrokinetic Technology Glossary | Open Energy Information  

Open Energy Info (EERE)

Technology Glossary Technology Glossary (Redirected from Axial Flow Turbine) Jump to: navigation, search << Return to the MHK database homepage Contents 1 Wave Power 1.1 Point Absorber 1.1.1 Submerged Pressure Differential (Example of a Point Absorber) 1.2 Oscillating Water Column 1.3 Overtopping Device 1.4 Attentuator 1.5 Oscillating Wave Surge Converter 2 Current Power 2.1 Axial Flow Turbine 2.2 Cross Flow Turbine 2.3 Reciprocating Device 2.3.1 Oscillating Hydrofoil: (Example of a Reciprocating Device) 3 Ocean Thermal Energy Conversion (OTEC) 3.1 Closed-cycle 3.2 Open-cycle 3.3 Hybrid Wave Power Graphics adapted from Bedard and Thresher Point Absorber Pointabsorber.jpg Wave energy capture device, with principal dimension relatively small compared to the wavelength, and is able to capture energy from a wave front

156

MHK Projects/Indian River Tidal Hydrokinetic Energy Project | Open Energy  

Open Energy Info (EERE)

Tidal Hydrokinetic Energy Project Tidal Hydrokinetic 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":38.6853,"lon":-75.0694,"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":""}]}

157

Assessment and Mapping of the Riverine Hydrokinetic Resource in the Continental United States  

Science Conference Proceedings (OSTI)

This report describes the methodology and results of the most rigorous assessment to date of the riverine hydrokinetic energy resource in the contiguous 48 states and Alaska, excluding tidal waters. The assessment provides estimates of the gross, naturally available resource, termed the theoretical resource, as well as estimates, termed the technically recoverable resource, that account for selected technological factors affecting capture and conversion of the theoretical resource. The ...

2012-12-12T23:59:59.000Z

158

Potential Benefits of Using Probabilistic Forecasts for Waves and Marine Winds Based on the ECMWF Ensemble Prediction System  

Science Conference Proceedings (OSTI)

The potential benefits of using the ECMWF Ensemble Prediction System (EPS) for waves and marine surface winds are demonstrated using buoy and platform data as well as altimeter data.

Řyvind Saetra; Jean-Raymond Bidlot

2004-08-01T23:59:59.000Z

159

MHK Technologies/Wave Catcher | Open Energy Information  

Open Energy Info (EERE)

Wave Catcher.png Wave Catcher.png Technology Profile Primary Organization Offshore Islands Ltd Technology Resource Click here Current Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The Wave Catcher can be orientated to take advantage of the most numerous prevailing waves to generate power It is a long surface buoy cylinder that is lifted by each passing wave As the cylinder is lifted it pulls on its anchor lines which in turn pulls on a support pulley This support pulley turns the generator s rotor and flywheel The generator s flywheel keeps the rotor turning until the next wave lifts up the cylinder and the anchor line once again turns the pulley The cylinder will also be lifted by waves from all directions As a result the anchor cables at each end of the buoy may either pull together or at slightly different times The gears the pulleys the rotor and flywheel are turned when the anchor cable s tension is high The uni direction pulley s re coil spring re winds the anchor cable back around the pulley when the buoy moves down with the trough of the wave and the anchor cable tension is low The wave generator can be in a surface buoy or mounted sub

160

MHK Technologies/Neptune Triton Wave | Open Energy Information  

Open Energy Info (EERE)

Triton Wave Triton Wave < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Neptune Triton Wave.jpg Technology Profile Primary Organization Neptune Renewable Energy Ltd Project(s) where this technology is utilized *MHK Projects/Neptune Renewable Energy 1 10 Scale Prototype Pilot Test *MHK Projects/Humber St Andrews Technology Resource Click here Wave Technology Type Click here Oscillating Wave Surge Converter Technology Readiness Level Click here TRL 1-3: Discovery / Concept Definition / Early Stage Development & Design & Engineering Technology Description The Triton operates in the near-shore and consists of an axi-asymmetrical buoy attached to an A-frame piled into the sea bed. The axi-asymmetrical buoy is designed to generate a counter-phase upstream wave and a much reduced downstream wave, which maximizes capture from the wave and improves overall efficiency. In order to tune the buoy to the incident wave regime, the mass can be controlled by pumping sea water into and out of the hollow cavity inside the buoy. Power take-off is achieved via a piston and hydraulic arrangement.

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Observations of the Directional Spectrum of Fetch-Limited Waves  

Science Conference Proceedings (OSTI)

Estimates of the wave directional spectrum of fetch-limited sea states are made from measurements made with a heave–pitch–roll buoy at the Maui location off the west coast of New Zealand. The fetch-limited sea states have significant wave heights ...

Kevin C. Ewans

1998-03-01T23:59:59.000Z

162

Design, construction, and initial operation of the BNL-coastal transport and diffusion, Air/Sea Interaction research buoy. Data report  

SciTech Connect

Design features of the Brookhaven National Laboratory (BNL) Air/Sea Interaction (A/S-I) buoy are described, and construction, testing, and deployment experiences are related. This two-attitude buoy is similar to the MIT/Navy buoy which it replaces, but it accommodates more instruments and can be towed through shallower water. The BNL A/S-I buoy can be broken down into two, three, or four sections to facilitate overland transport. Compressed air is stored aboard and the controls for deploying, trimming, and recovering the buoy are centralized on the superstructure and are perpetually above water level. The ballast control plumbing is entirely within the hull for maximum protection. The buoy also has a propane storage and distribution system and a 40-watt thermoelectric generator for powering instruments. Two buoys were built and tested in 1978, and one buoy was deployed in 1979 and is in operation off the south coast of Long Island.

Huszagh, D; Ripperger, W; Fink, S

1979-10-01T23:59:59.000Z

163

Wave Star Energy | Open Energy Information  

Open Energy Info (EERE)

Star Energy Star Energy Jump to: navigation, search Name Wave Star Energy Place Denmark Zip DK-2920 Product Denmark-based private wave device developer. References Wave Star Energy[1] 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: Wave Star Energy 1 10 Scale Model Test This company is involved in the following MHK Technologies: C5 WaveStar This article is a stub. You can help OpenEI by expanding it. Wave Star Energy is a company located in Denmark . References ↑ "Wave Star Energy" Retrieved from "http://en.openei.org/w/index.php?title=Wave_Star_Energy&oldid=678928" Categories: Clean Energy Organizations

164

Performance Evaluation of HYCOM-GOM for Hydrokinetic Resource Assessment in the Florida Strait  

SciTech Connect

The U.S. Department of Energy (DoE) is assessing and mapping the potential off-shore ocean current hydrokinetic energy resources along the U.S. coastline, excluding tidal currents, to facilitate market penetration of water power technologies. This resource assessment includes information on the temporal and three-dimensional spatial distribution of the daily averaged power density, and the overall theoretical hydrokinetic energy production, based on modeled historical simulations spanning a 7-year period of record using HYCOM-GOM, an ocean current observation assimilation model that generates a spatially distributed three-dimensional representation of daily averaged horizontal current magnitude and direction time series from which power density time series and their statistics can be derived. This study ascertains the deviation of HYCOM-GOM outputs, including transport (flow) and power density, from outputs based on three independent observation sources to evaluate HYCOM-GOM performance. The three independent data sources include NOAA s submarine cable data of transport, ADCP data at a high power density location, and HF radar data in the high power density region of the Florida Strait. Comparisons with these three independent observation sets indicate discrepancies with HYCOM model outputs, but overall indicate that the HYCOM-GOM model can provide an adequate assessment of the ocean current hydrokinetic resource in high power density regions like the Florida Strait. Additional independent observational data, in particular stationary ADCP measurements, would be useful for expanding this model performance evaluation study. ADCP measurements are rare in ocean environments not influenced by tides, and limited to one location in the Florida Strait. HF radar data, although providing great spatial coverage, is limited to surface currents only.

Neary, Vincent S [ORNL; Gunawan, Budi [ORNL; Ryou, Albert S [ORNL

2012-06-01T23:59:59.000Z

165

Measurement of velocity deficit at the downstream of a 1:10 axial hydrokinetic turbine model  

DOE Green Energy (OSTI)

Wake recovery constrains the downstream spacing and density of turbines that can be deployed in turbine farms and limits the amount of energy that can be produced at a hydrokinetic energy site. This study investigates the wake recovery at the downstream of a 1:10 axial flow turbine model using a pulse-to-pulse coherent Acoustic Doppler Profiler (ADP). In addition, turbine inflow and outflow velocities were measured for calculating the thrust on the turbine. The result shows that the depth-averaged longitudinal velocity recovers to 97% of the inflow velocity at 35 turbine diameter (D) downstream of the turbine.

Gunawan, Budi [ORNL; Neary, Vincent S [ORNL; Hill, Craig [St. Anthony Falls Laboratory, 2 Third Avenue SE, Minneapolis, MN 55414; Chamorro, Leonardo [St. Anthony Falls Laboratory, 2 Third Avenue SE, Minneapolis, MN 55414

2012-01-01T23:59:59.000Z

166

Inflow Characterization for Marine and Hydrokinetic Energy Devices. FY-2011: Annual Progress Report  

SciTech Connect

The Pacific Northwest National Laboratory (PNNL), in collaboration with the Applied Physics Laboratory at the University of Washington (APL-UW), has carried out a detailed preliminary fluid flow field study at site selected for testing of marine and hydrokinetic turbines using Acoustic Doppler Velocimetry (ADV) measurements, Acoustic Doppler Current Profiler (ADCP) measurements, and Conductivity, Temperature and Depth (CTD) measurements. In FY-2011 these measurements were performed continuously for two weeks, in order to collect data during neap and spring tides, as well as during diurnal tidal variations.

Richmond, Marshall C.; Durgesh, Vibhav; Thomson, Jim; Polagye, Brian

2011-06-09T23:59:59.000Z

167

Effects of Large Energetic Vortices on Axial-Flow Hydrokinetic Turbines  

DOE Green Energy (OSTI)

Large scale coherent motions around marine and hydrokinetic (MHK) machines can significantly increase the structural loading and affect the overall performance of the machines. Characterization of the approach turbulence and their impact on the instantaneous response of MHK devices is essential for improving their design and performance. This preliminary study investigates the effect of turbulence and dominant energetic coherent structures induced by a vertical cylinder on the structural load and energy production in a model MHK turbine. Results show that the power generated by the turbine is significantly reduced by the presence of the cylinder. This reduction depends on the distance from the cylinder and the level of turbulence around the rotor area.

Gunawan, Budi [ORNL; Neary, Vincent S [ORNL; Hill, Craig [St. Anthony Falls Laboratory, 2 Third Avenue SE, Minneapolis, MN 55414; Chamorro, Leonardo [St. Anthony Falls Laboratory, 2 Third Avenue SE, Minneapolis, MN 55414

2012-01-01T23:59:59.000Z

168

2011 Marine Hydrokinetic Device Modeling Workshop: Final Report; March 1, 2011  

SciTech Connect

This report summarizes the NREL Marine and Hydrokinetic Device Modeling Workshop. The objectives for the modeling workshop were to: (1) Review the designs of existing MHK device prototypes and discuss design and optimization procedures; (2) Assess the utility and limitations of modeling techniques and methods presently used for modeling MHK devices; (3) Assess the utility and limitations of modeling methods used in other areas, such as naval architecture and ocean engineering (e.g., oil & gas industry); and (4) Identify the necessary steps to link modeling with other important components that analyze MHK devices (e.g., tank testing, PTO design, mechanical design).

Li, Y.; Reed, M.; Smith, B.

2011-10-01T23:59:59.000Z

169

Eddy-Correlation Measurements of Air-Sea Fluxes from a Discus Buoy  

Science Conference Proceedings (OSTI)

This paper demonstrates that it is practical to measure turbulent air-sea fluxes from a discus buoy. It proposes a method to correct the measured wind flow, for velocities induced by angular and axial movements of the anemometer, allowing the ...

François Anctil; Mark A. Donelan; William M. Drennan; Hans C. Graber

1994-08-01T23:59:59.000Z

170

New Ozone Measurement Systems for Autonomous Operation on Ocean Buoys and Towers  

Science Conference Proceedings (OSTI)

Two autonomous ozone measurement systems for use on ocean buoys and towers have been built and are discussed herein. They are based on low-power atmospheric ozone sensors from Physical Sciences Inc. (PSI) and 2B Technologies. The PSI sensor ...

E. J. Hintsa; G. P. Allsup; C. F. Eck; D. S. Hosom; M. J. Purcell; A. A. Roberts; D. R. Scott; E. R. Sholkovitz; W. T. Rawlins; P. A. Mulhall; K. Lightner; W. W. McMillan; J. Song; M. J. Newchurch

2004-07-01T23:59:59.000Z

171

An Eigenvector Method for the Calculation of Directional Spectra from Heave, Pitch and Roll Buoy Data  

Science Conference Proceedings (OSTI)

An eigenvector (EV) method for the determination of directional spectra from heave, pitch and roll buoy data is presented. Both a direct and an iterative form (based on an algorithm by Pawka) of this data-adaptive procedure are developed. The ...

R. F. Marsden; B. A. Juszko

1987-12-01T23:59:59.000Z

172

A Gas-Capture Buoy for Measuring Bubbling Gas Flux in Oceans and Lakes  

Science Conference Proceedings (OSTI)

The design, calibration, and deployment of a buoy and gas-capture assembly for measuring bubbling gas flux in oceans and lakes are described. The assembly collects gas in a chamber while continuously measuring the position of the gas–water ...

Libe Washburn; Cyril Johnson; Chris C. Gotschalk; E. Thor Egland

2001-08-01T23:59:59.000Z

173

Position-logging Drifting Buoys Using Decca Navigator and Argos for High-Resolution Spatial Sampling  

Science Conference Proceedings (OSTI)

The need for a precision current-tracking system that could he deployed for up to 12 months as part of the U.K. Natural Environment Research Council's North Sea Project led to the development of a position-logging drifting buoy, which employs ...

G. Roberts; J. D. Last; E. W. Roberts; A. E. Hill

1991-10-01T23:59:59.000Z

174

Assessment of a New Anemometry System for the Met Office’s Moored Buoy Network  

Science Conference Proceedings (OSTI)

Since the late 1980s the Met Office has operated a network of Marine Automatic Weather Stations (MAWS) around the United Kingdom. The network includes a number of instrumented moored buoys, which are mainly in exposed open-ocean locations. The ...

Jon Turton; Charlie Pethica

2010-12-01T23:59:59.000Z

175

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

176

Dynamics Simulation in a Wave Environment  

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

Coupled Dynamic Simulation in a Wave Coupled Dynamic Simulation in a Wave Environment (Navatek, AEGIR, and WECs) Marine and Hydrokinetics Instrumentation Workshop 9 July 2012 David Kring, Navatek Ltd. Presentation Overview * Introduction to Navatek * AEGIR brief: resistance, seakeeping, global and local loads a 3D, NURBS-based, high-order, Rankine boundary element method ... from same lab as at MIT as WAMIT and SWAN, with pFFT acceleration coupling with controls, structures, aerodynamics, power take-offs * Some WEC applications at Navatek 2 Honolulu, Hawaii, USA Company Background A "Research Shipyard" based in Honolulu, HI Combining simulation-based design with prototype construction

177

International Standards Development for Marine and Hydrokinetic Renewable Energy - Final Report on Technical Status  

DOE Green Energy (OSTI)

This report summarizes the progress toward development of International Standards for Marine and Hydrokinetic Renewable Energy, as funded by the U.S. Department of Energy (DOE) under the International Electrotechnical Commission (IEC) Technical Committee 114. The project has three main objectives: 1. Provide funding to support participation of key U.S. industry technical experts in 6 (originally 4) international working groups and/or project teams (the primary standards-making committees) and to attend technical meetings to ensure greater U.S. involvement in the development of these standards. 2. Provide a report to DOE and industry stakeholders summarizing the IEC standards development process for marine and hydrokinetic renewable energy, new international standards and their justifications, and provide standards guidance to industry members. 3. Provide a semi-annual (web-based) newsletter to the marine renewable energy community. The newsletter will educate industry members and stakeholders about the processes, progress, and needs of the US efforts to support the international standards development effort. The newsletter is available at www.TC114.us

Rondorf, Neil E.; Busch, Jason; Kimball, Richard

2011-10-29T23:59:59.000Z

178

Benchmark Modeling of the Near-Field and Far-Field Wave Effects of Wave Energy Arrays  

SciTech Connect

This project is an industry-led partnership between Columbia Power Technologies and Oregon State University that will perform benchmark laboratory experiments and numerical modeling of the near-field and far-field impacts of wave scattering from an array of wave energy devices. These benchmark experimental observations will help to fill a gaping hole in our present knowledge of the near-field effects of multiple, floating wave energy converters and are a critical requirement for estimating the potential far-field environmental effects of wave energy arrays. The experiments will be performed at the Hinsdale Wave Research Laboratory (Oregon State University) and will utilize an array of newly developed BuoysĂ?Â?Ă?Â?Ă?Â?Ă?Âť that are realistic, lab-scale floating power converters. The array of Buoys will be subjected to realistic, directional wave forcing (1:33 scale) that will approximate the expected conditions (waves and water depths) to be found off the Central Oregon Coast. Experimental observations will include comprehensive in-situ wave and current measurements as well as a suite of novel optical measurements. These new optical capabilities will include imaging of the 3D wave scattering using a binocular stereo camera system, as well as 3D device motion tracking using a newly acquired LED system. These observing systems will capture the 3D motion history of individual Buoys as well as resolve the 3D scattered wave field; thus resolving the constructive and destructive wave interference patterns produced by the array at high resolution. These data combined with the device motion tracking will provide necessary information for array design in order to balance array performance with the mitigation of far-field impacts. As a benchmark data set, these data will be an important resource for testing of models for wave/buoy interactions, buoy performance, and far-field effects on wave and current patterns due to the presence of arrays. Under the proposed project we will initiate high-resolution (fine scale, very near-field) fluid/structure interaction simulations of buoy motions, as well as array-scale, phase-resolving wave scattering simulations. These modeling efforts will utilize state-of-the-art research quality models, which have not yet been brought to bear on this complex problem of large array wave/structure interaction problem.

Rhinefrank, Kenneth E.; Haller, Merrick C.; Ozkan-Haller, H. Tuba

2013-01-26T23:59:59.000Z

179

SeWave | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » SeWave Jump to: navigation, search Name SeWave Place Denmark Zip FO-110 Product Denmark-based 50:50 JV between UK's Wavegen and Faroese electricity company SEV to to design and build a tunnelled demonstration wave power plant in the Faroes Islands. References SeWave[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This article is a stub. You can help OpenEI by expanding it. SeWave is a company located in Denmark . References ↑ "SeWave"

180

Climatology of Surface Meteorology, Surface Fluxes, Cloud Fraction, and Radiative Forcing over the Southeast Pacific from Buoy Observations  

Science Conference Proceedings (OSTI)

A 5-yr climatology of the meteorology, including boundary layer cloudiness, for the southeast Pacific region is presented using observations from a buoy located at 20°S, 85°W. The sea surface temperature and surface air temperature exhibit a ...

Virendra P. Ghate; Bruce A. Albrecht; Christopher W. Fairall; Robert A. Weller

2009-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

MHK Projects/OSU Direct Drive Power Generation Buoys | Open Energy  

Open Energy Info (EERE)

OSU Direct Drive Power Generation Buoys OSU Direct Drive Power Generation Buoys < 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":44.6472,"lon":-124.127,"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":""}]}

182

Ocean Wave Energy-Driven Desalination Systems for Off-grid Coastal Communities in Developing Countries  

Science Conference Proceedings (OSTI)

Resolute Marine Energy, Inc. (RME) is based in Boston, MA and is developing ocean wave energy converters (WECs) to benefit remote off-grid communities in developing nations. Our two WEC technologies are based on the heaving and surging motion of a buoy ... Keywords: ocean wave energy, renewable energy, desalination, water, coastal communities

Eshwan Ramudu

2011-10-01T23:59:59.000Z

183

Hydrodynamic Optimization Method and Design Code for Stall-Regulated Hydrokinetic Turbine Rotors  

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

5021 5021 August 2009 Hydrodynamic Optimization Method and Design Code for Stall-Regulated Hydrokinetic Turbine Rotors D. Sale University of Tennessee J. Jonkman and W. Musial National Renewable Energy Laboratory Presented at the ASME 28 th International Conference on Ocean, Offshore, and Arctic Engineering Honolulu, Hawaii May 31-June 5, 2009 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (ASE), a contractor of the US Government under Contract No. DE-AC36-08-GO28308. Accordingly, the US Government and ASE retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

184

Hydrodynamic Optimization Method and Design Code for Stall-Regulated Hydrokinetic Turbine Rotors  

DOE Green Energy (OSTI)

This report describes the adaptation of a wind turbine performance code for use in the development of a general use design code and optimization method for stall-regulated horizontal-axis hydrokinetic turbine rotors. This rotor optimization code couples a modern genetic algorithm and blade-element momentum performance code in a user-friendly graphical user interface (GUI) that allows for rapid and intuitive design of optimal stall-regulated rotors. This optimization method calculates the optimal chord, twist, and hydrofoil distributions which maximize the hydrodynamic efficiency and ensure that the rotor produces an ideal power curve and avoids cavitation. Optimizing a rotor for maximum efficiency does not necessarily create a turbine with the lowest cost of energy, but maximizing the efficiency is an excellent criterion to use as a first pass in the design process. To test the capabilities of this optimization method, two conceptual rotors were designed which successfully met the design objectives.

Sale, D.; Jonkman, J.; Musial, W.

2009-08-01T23:59:59.000Z

185

Wind Stress from Wave Slopes Using Phillips Equilibrium Theory  

Science Conference Proceedings (OSTI)

An open ocean, deep water air–sea interaction experiment was conducted in the Gulf of Alaska. Wave amplitude and slope data were measured using a WAVEC heave, pitch, and roll buoy that was let drift in the Alaska gyre. Wind stress estimates were ...

Barbara-Ann Juszko; Richard F. Marsden; Sherman R. Waddell

1995-02-01T23:59:59.000Z

186

Environmental Effects of Hydrokinetic Turbines on Fish: Desktop and Laboratory Flume Studies  

DOE Green Energy (OSTI)

Flume studies exposed fish to two hydrokinetic turbine designs to determine injury and survival rates and to assess behavioral responses. Also, a theoretical model developed for predicting strike probability and mortality of fish passing through conventional hydro turbines was adapted for use with hydrokinetic turbines and applied to the two designs evaluated during flume studies. The flume tests were conducted with the Lucid spherical turbine (LST), a Darrieus-type (cross flow) turbine, and the Welka UPG, an axial flow propeller turbine. Survival rates for rainbow trout tested with the LST were greater than 98% for both size groups and approach velocities evaluated. Turbine passage survival rates for rainbow trout and largemouth bass tested with the Welka UPG were greater than 99% for both size groups and velocities evaluated. Injury rates of turbine-exposed fish were low with both turbines and generally comparable to control fish. Video observations of the LST demonstrated active avoidance of turbine passage by a large proportion fish despite being released about 25 cm upstream of the turbine blade sweep. Video observations from behavior trials indicated few if any fish pass through the turbines when released farther upstream. The theoretical predictions for the LST indicated that strike mortality would begin to occur at an ambient current velocity of about 1.7 m/s for fish with lengths greater than the thickness of the leading edge of the blades. As current velocities increase above 1.7 m/s, survival was predicted to decrease for fish passing through the LST, but generally remained high (greater than 90%) for fish less than 200 mm in length. Strike mortality was not predicted to occur duri

Jacobson, Paul T. [Electric Power Research Institute; Amaral, Stephen V. [Alden Research Laboratory; Castro-Santos, Theodore [U.S. Geological Survey; Giza, Dan [Alden Research Laboratory; Haro, Alexander J. [U.S. Geological Survey; Hecker, George [Alden Research Laboratory; McMahon, Brian [Alden Research Laboratory; Perkins, Norman [Alden Research Laboratory; Pioppi, Nick [Alden Research Laboratory

2012-12-31T23:59:59.000Z

187

Tethys: The Marine and Hydrokinetic Technology Environmental Impacts Knowledge Management System -- Requirements Specification -- Version 1.0  

SciTech Connect

The marine and hydrokinetic (MHK) environmental impacts knowledge management system (KMS), dubbed Tethys after the mythical Greek goddess of the seas, is being developed for the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy Wind and Hydropower Technologies Program (WHTP) by Pacific Northwest National Laboratory (PNNL). This requirements specification establishes the essential capabilities required of Tethys and clarifies for WHTP and the Tethys development team the results that must be achieved by the system.

Butner, R. Scott; Snowden-Swan, Lesley J.; Ellis, Peter C.

2010-11-09T23:59:59.000Z

188

Siting Study Framework and Survey Methodology for Marine and Hydrokinetic Energy Project in Offshore Southeast Florida  

SciTech Connect

Dehlsen Associates, LLC was awarded a grant by the United States Department of Energy (DOE) Golden Field Office for a project titled 'Siting Study Framework and Survey Methodology for Marine and Hydrokinetic Energy Project in Offshore Southeast Florida,' corresponding to DOE Grant Award Number DE-EE0002655 resulting from DOE funding Opportunity Announcement Number DE-FOA-0000069 for Topic Area 2, and it is referred to herein as 'the project.' The purpose of the project was to enhance the certainty of the survey requirements and regulatory review processes for the purpose of reducing the time, efforts, and costs associated with initial siting efforts of marine and hydrokinetic energy conversion facilities that may be proposed in the Atlantic Ocean offshore Southeast Florida. To secure early input from agencies, protocols were developed for collecting baseline geophysical information and benthic habitat data that can be used by project developers and regulators to make decisions early in the process of determining project location (i.e., the siting process) that avoid or minimize adverse impacts to sensitive marine benthic habitat. It is presumed that such an approach will help facilitate the licensing process for hydrokinetic and other ocean renewable energy projects within the study area and will assist in clarifying the baseline environmental data requirements described in the U.S. Department of the Interior Bureau of Ocean Energy Management, Regulation and Enforcement (formerly Minerals Management Service) final regulations on offshore renewable energy (30 Code of Federal Regulations 285, published April 29, 2009). Because projects generally seek to avoid or minimize impacts to sensitive marine habitats, it was not the intent of this project to investigate areas that did not appear suitable for the siting of ocean renewable energy projects. Rather, a two-tiered approach was designed with the first step consisting of gaining overall insight about seabed conditions offshore southeastern Florida by conducting a geophysical survey of pre-selected areas with subsequent post-processing and expert data interpretation by geophysicists and experienced marine biologists knowledgeable about the general project area. The second step sought to validate the benthic habitat types interpreted from the geophysical data by conducting benthic video and photographic field surveys of selected habitat types. The goal of this step was to determine the degree of correlation between the habitat types interpreted from the geophysical data and what actually exists on the seafloor based on the benthic video survey logs. This step included spot-checking selected habitat types rather than comprehensive evaluation of the entire area covered by the geophysical survey. It is important to note that non-invasive survey methods were used as part of this study and no devices of any kind were either temporarily or permanently attached to the seabed as part of the work conducted under this project.

Vinick, Charles; Riccobono, Antonino, MS; Messing, Charles G., Ph.D.; Walker, Brian K., Ph.D.; Reed, John K., Ph.D.

2012-02-28T23:59:59.000Z

189

Environmentally Benign and Permanent Modifications to Prevent Biofouling on Marine and Hydrokinetic Devices  

DOE Green Energy (OSTI)

Semprus Biosciences is developing environmentally benign and permanent modifications to prevent biofouling on Marine and Hydrokinetic (MHK) devices. Biofouling, including growth on external surfaces by bacteria, algae, barnacles, mussels, and other marine organisms, accumulate quickly on MHK devices, causing mechanical wear and changes in performance. Biofouling on crucial components of hydrokinetic devices, such as rotors, generators, and turbines, imposes substantial mass and hydrodynamic loading with associated efficiency loss and maintenance costs. Most antifouling coatings leach toxic ingredients, such as copper and tributyltin, through an eroding process, but increasingly stringent regulation of biocides has led to interest in the development of non-biocidal technologies to control fouling. Semprus Biosciences research team is developing modifications to prevent fouling from a broad spectrum of organisms on devices of all shapes, sizes, and materials for the life of the product. The research team designed and developed betaine-based polymers as novel underwater coatings to resist the attachment of marine organisms. Different betaine-based monomers and polymers were synthesized and incorporated within various coating formulations. The formulations and application methods were developed on aluminum panels with required adhesion strength and mechanical properties. The coating polymers were chemically stable under UV, hydrolytic and oxidative environments. The sulfobetaine formulations are applicable as nonleaching and stable underwater coatings. For the first time, coating formulations modified with highly packed sulfobetaine polymers were prepared and demonstrated resistance to a broad spectrum of marine organisms. Assays for comparing nonfouling performance were developed to evaluate protein adsorption and bacteria attachment. Barnacle settlement and removal were evaluated and a 60-day field test was performed. Silicone substrates including a commercial fouling release coating were used for comparison. Compared with the unmodified silicone substrates, the sulfobetaine-modified formulations were able to exhibit a 98% reduction in fibrinogen adsorption, 97.0% (E. coli), 99.6% (S. aureus), and 99.5% (C. lytica) reduction in bacteria attachment, and 100% reduction in barnacles cyprid attachment. In addition to the significant improvement in fouling resistance of various organisms, the 60-day field test also showed an evident efficacy from visual assessment, foul rating, and fouling removal test. The research confirmed that the novel antifouling mechanism of betaine polymers provides a new avenue for marine coating development. The developed coatings out-performed currently used nontoxic underwater coatings in a broad spectrum of fouling resistance. By further developing formulations and processing methods for specific devices, the technology is ready for the next stage of development with demonstration in MHK systems.

Zheng Zhang

2012-04-19T23:59:59.000Z

190

Offshore refrigerated LPG loading/unloading terminal using a CALM buoy  

SciTech Connect

In existing Liquefied Petroleum Gases terminals, the transfer of liquefied gases to the tanker is performed via articulated loading arms or flexible hoses, working under quasistatic conditions. The tanker has to be firmly moored alongside a jetty or a process barge in a protected area (such as a harbour in most cases). This paper gives the main results of the development of an offshore refrigerated LPG (-48/sup 0/C) loading/unloading system, using a CALM buoy and LPG floating hoses working under dynamic conditions. The aim of this new concept is to replace the standard harbour structure for loading/unloading refrigerated LPG and to provide a considerable reduction in investments and a greater flexibility regarding the terminal location. The main components of that terminal have been designed so as to enable the loading of a 75 000 cubic meter LPG carrier in 15 hours. The results of static and dynamic low temperature tests on a LPG swivel joint for CALM buoy and LPG floating hoses show that such a SPM terminal is now a realistic solution.

Bonjour, E.L.; Simon, J.M.

1985-03-01T23:59:59.000Z

191

US Department of Energy National Lab Activities in Marine Hydrokinetics: Machine Performance Testing  

Science Conference Proceedings (OSTI)

Marine and hydrokinetic (MHK) technology performance testing in the laboratory and field supports the US Department of Energy s MHK program goals to advance the technology readiness levels of MHK machines, to ensure environmentally responsible designs, to identify key cost drivers, and to reduce the cost of energy of MHK technologies. Laboratory testing results from scaled model machine testing at the University of Minnesota s St. Anthony Falls Laboratory (SAFL) main channel flume are presented, including simultaneous machine power and inflow measurements for a 1:10 scale three-bladed axial flow turbine used to assess machine performance in turbulent flows, and detailed measurements of inflow and wake flow velocity and turbulence, including the assessment of the effects of large energetic organized vortex shedding on machine performance and wake turbulence downstream. Scaled laboratory testing provides accurate data sets for near- and far-field hydrodynamic models, and useful information on technology and environmental readiness levels before full-scale testing and demonstration in open water. This study validated turbine performance for a technology in order to advance its technology readiness level. Synchronized ADV measurements to calculate spatio-temporal characteristics of turbulence supported model development of the inflow turbulence model, Hydro-TurbSim, developed by the National Renewable Energy Laboratory (NREL) to evaluate unsteady loading on MHK machines. Wake flow measurements supported model development of the far-field model, SNL-EFDC, developed by Sandia National Laboratory (SNL) to optimize spacing for MHK machine arrays.

Neary, Vincent S [ORNL; Chamorro, Leonardo [St. Anthony Falls Laboratory, 2 Third Avenue SE, Minneapolis, MN 55414; Hill, Craig [St. Anthony Falls Laboratory, 2 Third Avenue SE, Minneapolis, MN 55414; Gunawan, Budi [Oak Ridge National Laboratory (ORNL); Sotiropoulos, Fotis [University of Minnesota

2012-01-01T23:59:59.000Z

192

Attraction to and Avoidance of instream Hydrokinetic Turbines by Freshwater Aquatic Organisms  

Science Conference Proceedings (OSTI)

The development of hydrokinetic (HK) energy projects is under consideration at over 150 sites in large rivers in the United States, including the Mississippi, Ohio, Tennessee, and Atchafalaya Rivers. These waterbodies support numerous fish species that might interact with the HK projects in a variety of ways, e.g., by attraction to or avoidance of project structures. Although many fish species inhabit these rivers (about 172 species in the Mississippi River alone), not all of them will encounter the HK projects. Some species prefer low-velocity, backwater habitats rather than the high-velocity, main channel areas that would be the best sites for HK. Other, riverbank-oriented species are weak swimmers or too small to inhabit the main channel for significant periods of time. Some larger, main channel fish species are not known to be attracted to structures. Based on a consideration of habitat preferences, size/swim speed, and behavior, fish species that are most likely to be attracted to HK structures in the main channel include carps, suckers, catfish, white bass, striped bass, smallmouth bass, spotted bass, and sauger. Proper siting of the project in order to avoid sensitive fish populations, backwater and fish nursery habitat areas, and fish migration corridors will likely minimize concerns about fish attraction to or avoidance of HK structures.

Cada, Glenn F [ORNL; Bevelhimer, Mark S [ORNL

2011-05-01T23:59:59.000Z

193

Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop  

DOE Green Energy (OSTI)

The Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop was hosted by the National Renewable Energy Laboratory (NREL) in Broomfield, Colorado, July 9-10, 2012. The workshop brought together over 60 experts in marine energy technologies to disseminate technical information to the marine energy community and collect information to help identify ways in which the development of a commercially viable marine energy industry can be accelerated. The workshop was comprised of plenary sessions that reviewed the state of the marine energy industry and technical sessions that covered specific topics of relevance. Each session consisted of presentations, followed by facilitated discussions. During the facilitated discussions, the session chairs posed several prepared questions to the presenters and audience to encourage communication and the exchange of ideas between technical experts. Following the workshop, attendees were asked to provide written feedback on their takeaways and their best ideas on how to accelerate the pace of marine energy technology development. The first four sections of this document give a general overview of the workshop format, provide presentation abstracts and discussion session notes, and list responses to the post-workshop questions. The final section presents key findings and conclusions from the workshop that suggest how the U.S. Department of Energy and national laboratory resources can be utilized to most effectively assist the marine energy industry.

Musial, W.; Lawson, M.; Rooney, S.

2013-02-01T23:59:59.000Z

194

Field Measurements at River and Tidal Current Sites for Hydrokinetic Energy Development: Best Practices Manual  

SciTech Connect

In this report, existing data collection techniques and protocols for characterizing open channel flows are reviewed and refined to further address the needs of the MHK industry. The report provides an overview of the hydrodynamics of river and tidal channels, and the working principles of modern acoustic instrumentation, including best practices in remote sensing methods that can be applied to hydrokinetic energy site characterization. Emphasis is placed upon acoustic Doppler velocimeter (ADV) and acoustic-Doppler current profiler (ADCP) instruments, as these represent the most practical and economical tools for use in the MHK industry. Incorporating the best practices as found in the literature, including the parameters to be measured, the instruments to be deployed, the instrument deployment strategy, and data post-processing techniques. The data collected from this procedure aims to inform the hydro-mechanical design of MHK systems with respect to energy generation and structural loading, as well as provide reference hydrodynamics for environmental impact studies. The standard metrics and protocols defined herein can be utilized to guide field experiments with MHK systems.

Neary, Vincent S [ORNL; Gunawan, Budi [Oak Ridge National Laboratory (ORNL)

2011-09-01T23:59:59.000Z

195

Advanced, High Power, Next Scale, Wave Energy Conversion Device  

SciTech Connect

The project conducted under DOE contract DE?EE0002649 is defined as the Advanced, High Power, Next Scale, Wave Energy Converter. The overall project is split into a seven?stage, gated development program. The work conducted under the DOE contract is OPT Stage Gate III work and a portion of Stage Gate IV work of the seven stage product development process. The project effort includes Full Concept Design & Prototype Assembly Testing building on our existing PowerBuoy? technology to deliver a device with much increased power delivery. Scaling?up from 150kW to 500kW power generating capacity required changes in the PowerBuoy design that addressed cost reduction and mass manufacturing by implementing a Design for Manufacturing (DFM) approach. The design changes also focused on reducing PowerBuoy Installation, Operation and Maintenance (IO&M) costs which are essential to reducing the overall cost of energy. In this design, changes to the core PowerBuoy technology were implemented to increase capability and reduce both CAPEX and OPEX costs. OPT conceptually envisaged moving from a floating structure to a seabed structure. The design change from a floating structure to seabed structure would provide the implementation of stroke? unlimited Power Take?Off (PTO) which has a potential to provide significant power delivery improvement and transform the wave energy industry if proven feasible.

Mekhiche, Mike [Principal Investigator] [Principal Investigator; Dufera, Hiz [Project Manager] [Project Manager; Montagna, Deb [Business Point of Contact] [Business Point of Contact

2012-10-29T23:59:59.000Z

196

Wind Driven Flow in the Mixed Layer Observed by Drifting Buoys during Autumn–Winter in the Midlatitude North Pacific  

Science Conference Proceedings (OSTI)

Wind-driven flow in the upper 90 meters during autumn–winter in the midlatitude North Pacific is investigated using satellite-traced drifting buoys (i.e., drifters) deployed nearly simultaneously but drogued at different depths. The difference in ...

G. J. McNally; W. B. White

1985-06-01T23:59:59.000Z

197

An Observation of the Directional Wave Spectrum Evolution from Shoreline to Fully Developed  

Science Conference Proceedings (OSTI)

The Surface Contour Radar (SCR) is a 36-GHz computer-controlled airborne system, which produces ocean directional wave spectra with much higher angular resolution than pitch-and-roll buoys. SCR observations of the evolution of the fetch-limited ...

Edward J. Walsh; David W. Hancock III; Donald E. Hines; Robert N. Swift; John F. Scott

1989-05-01T23:59:59.000Z

198

An Open Ocean Trial of Controlled Upwelling Using Wave Pump Technology  

Science Conference Proceedings (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

199

Study of the Acoustic Effects of Hydrokinetic Tidal Turbines in Admiralty Inlet, Puget Sound  

SciTech Connect

Hydrokinetic turbines will be a source of noise in the marine environment - both during operation and during installation/removal. High intensity sound can cause injury or behavioral changes in marine mammals and may also affect fish and invertebrates. These noise effects are, however, highly dependent on the individual marine animals; the intensity, frequency, and duration of the sound; and context in which the sound is received. In other words, production of sound is a necessary, but not sufficient, condition for an environmental impact. At a workshop on the environmental effects of tidal energy development, experts identified sound produced by turbines as an area of potentially significant impact, but also high uncertainty. The overall objectives of this project are to improve our understanding of the potential acoustic effects of tidal turbines by: (1) Characterizing sources of existing underwater noise; (2) Assessing the effectiveness of monitoring technologies to characterize underwater noise and marine mammal responsiveness to noise; (3) Evaluating the sound profile of an operating tidal turbine; and (4) Studying the effect of turbine sound on surrogate species in a laboratory environment. This study focuses on a specific case study for tidal energy development in Admiralty Inlet, Puget Sound, Washington (USA), but the methodologies and results are applicable to other turbine technologies and geographic locations. The project succeeded in achieving the above objectives and, in doing so, substantially contributed to the body of knowledge around the acoustic effects of tidal energy development in several ways: (1) Through collection of data from Admiralty Inlet, established the sources of sound generated by strong currents (mobilizations of sediment and gravel) and determined that low-frequency sound recorded during periods of strong currents is non-propagating pseudo-sound. This helped to advance the debate within the marine and hydrokinetics acoustic community as to whether strong currents produce propagating sound. (2) Analyzed data collected from a tidal turbine operating at the European Marine Energy Center to develop a profile of turbine sound and developed a framework to evaluate the acoustic effects of deploying similar devices in other locations. This framework has been applied to Public Utility District No. 1 of Snohomish Country's demonstration project in Admiralty Inlet to inform postinstallation acoustic and marine mammal monitoring plans. (3) Demonstrated passive acoustic techniques to characterize the ambient noise environment at tidal energy sites (fixed, long-term observations recommended) and characterize the sound from anthropogenic sources (drifting, short-term observations recommended). (4) Demonstrated the utility and limitations of instrumentation, including bottom mounted instrumentation packages, infrared cameras, and vessel monitoring systems. In doing so, also demonstrated how this type of comprehensive information is needed to interpret observations from each instrument (e.g., hydrophone data can be combined with vessel tracking data to evaluate the contribution of vessel sound to ambient noise). (5) Conducted a study that suggests harbor porpoise in Admiralty Inlet may be habituated to high levels of ambient noise due to omnipresent vessel traffic. The inability to detect behavioral changes associated with a high intensity source of opportunity (passenger ferry) has informed the approach for post-installation marine mammal monitoring. (6) Conducted laboratory exposure experiments of juvenile Chinook salmon and showed that exposure to a worse than worst case acoustic dose of turbine sound does not result in changes to hearing thresholds or biologically significant tissue damage. Collectively, this means that Chinook salmon may be at a relatively low risk of injury from sound produced by tidal turbines located in or near their migration path. In achieving these accomplishments, the project has significantly advanced the District's goals of developing a demonstration-scale tidal energy proj

Brian Polagye; Jim Thomson; Chris Bassett; Jason Wood; Dom Tollit; Robert Cavagnaro; Andrea Copping

2012-03-30T23:59:59.000Z

200

A Comparison of ECMWF, NCEP–NCAR, and SOC Surface Heat Fluxes with Moored Buoy Measurements in the Subduction Region of the Northeast Atlantic  

Science Conference Proceedings (OSTI)

The accuracy of surface heat flux estimates from the NCEP–NCAR and ECMWF atmospheric model reanalyses is assessed by comparison with Woods Hole Oceanographic Institute research buoy measurements made during the Subduction Experiment in the ...

S. A. Josey

2001-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

The “BOUSSOLE” Buoy—A New Transparent-to-Swell Taut Mooring Dedicated to Marine Optics: Design, Tests, and Performance at Sea  

Science Conference Proceedings (OSTI)

A new concept of oceanographic data buoy is described, which couples a taut mooring and a “transparent-to-swell” superstructure, and is specifically designed for the collection of radiometric quantities in offshore environments. The design of the ...

David Antoine; Pierre Guevel; Jean-François Desté; Guislain Bécu; Francis Louis; Alec J. Scott; Philippe Bardey

2008-06-01T23:59:59.000Z

202

MHK Technologies/Uppsala Seabased AB Wave Energy Converter | Open Energy  

Open Energy Info (EERE)

AB Wave Energy Converter AB Wave Energy Converter < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Uppsala Seabased AB Wave Energy Converter.jpg Technology Profile Primary Organization Uppsala University Division for Electricity Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 5 6 System Integration and Technology Laboratory Demonstration Technology Description The system consists of a linear permanent magnet synchronous generator located on the sea floor The generator is connected directly via a line to a buoy on the surface There are no intermediate energy conversion steps thus the generator motion is the same as the buoy motion Several generators 3 today are connected to a marine substation where the voltage is converted to grid frequency transformed to higher voltage and transmitted to shore All electrical cables throughout the system are fixed i e there are no motions that subject the cables to bending moments

203

Analysis of SWADE Discus N Wind Speed and Wave Height Time Series. Part II: Quantitative Growth Rates during a Storm  

Science Conference Proceedings (OSTI)

In Part I, wind speed and wave height time series obtained from the Discus N buoy during two storm events recorded in the SWADE experiment were analyzed using discrete wavelet packet transforms. One result of the analysis is that distinct tightly ...

Jorge F. Willemsen

1997-06-01T23:59:59.000Z

204

Analysis of SWADE Discus N Wind Speed and Wave Height Time Series. Part I: Discrete Wavelet Packet Representations  

Science Conference Proceedings (OSTI)

Discus N denotes a single buoy employed during the SWADE experiment, equipped to record wave amplitude and wind speed time series at a rate of 1 Hz. Over the course of approximately 4.5 days, two clear-cut examples of sea response to wind ...

Jorge E. Willemsen

1995-12-01T23:59:59.000Z

205

Assssment and Mapping of the Riverine Hydrokinetic Resource in the Continental United States  

SciTech Connect

The U.S. Department of Energy (DOE) funded the Electric Power Research Institute and its collaborative partners, University of Alaska ? Anchorage, University of Alaska ? Fairbanks, and the National Renewable Energy Laboratory, to provide an assessment of the riverine hydrokinetic resource in the continental United States. The assessment benefited from input obtained during two workshops attended by individuals with relevant expertise and from a National Research Council panel commissioned by DOE to provide guidance to this and other concurrent, DOE-funded assessments of water based renewable energy. These sources of expertise provided valuable advice regarding data sources and assessment methodology. The assessment of the hydrokinetic resource in the 48 contiguous states is derived from spatially-explicit data contained in NHDPlus ?a GIS-based database containing river segment-specific information on discharge characteristics and channel slope. 71,398 river segments with mean annual flow greater than 1,000 cubic feet per second (cfs) mean discharge were included in the assessment. Segments with discharge less than 1,000 cfs were dropped from the assessment, as were river segments with hydroelectric dams. The results for the theoretical and technical resource in the 48 contiguous states were found to be relatively insensitive to the cutoff chosen. Raising the cutoff to 1,500 cfs had no effect on estimate of the technically recoverable resource, and the theoretical resource was reduced by 5.3%. The segment-specific theoretical resource was estimated from these data using the standard hydrological engineering equation that relates theoretical hydraulic power (Pth, Watts) to discharge (Q, m3 s-1) and hydraulic head or change in elevation (??, m) over the length of the segment, where ? is the specific weight of water (9800 N m-3): ??? = ? ? ?? For Alaska, which is not encompassed by NPDPlus, hydraulic head and discharge data were manually obtained from Idaho National Laboratory?s Virtual Hydropower Prospector, Google Earth, and U.S. Geological Survey gages. Data were manually obtained for the eleven largest rivers with average flow rates greater than 10,000 cfs and the resulting estimate of the theoretical resource was expanded to include rivers with discharge between 1,000 cfs and 10,000 cfs based upon the contribution of rivers in the latter flow class to the total estimate in the contiguous 48 states. Segment-specific theoretical resource was aggregated by major hydrologic region in the contiguous, lower 48 states and totaled 1,146 TWh/yr. The aggregate estimate of the Alaska theoretical resource is 235 TWh/yr, yielding a total theoretical resource estimate of 1,381 TWh/yr for the continental US. The technically recoverable resource in the contiguous 48 states was estimated by applying a recovery factor to the segment-specific theoretical resource estimates. The recovery factor scales the theoretical resource for a given segment to take into account assumptions such as minimum required water velocity and depth during low flow conditions, maximum device packing density, device efficiency, and flow statistics (e.g., the 5 percentile flow relative to the average flow rate). The recovery factor also takes account of ?back effects? ? feedback effects of turbine presence on hydraulic head and velocity. The recovery factor was determined over a range of flow rates and slopes using the hydraulic model, HEC-RAS. In the hydraulic modeling, presence of turbines was accounted for by adjusting the Manning coefficient. This analysis, which included 32 scenarios, led to an empirical function relating recovery factor to slope and discharge. Sixty-nine percent of NHDPlus segments included in the theoretical resource estimate for the contiguous 48 states had an estimated recovery factor of zero. For Alaska, data on river slope was not readily available; hence, the recovery factor was estimated based on the flow rate alone. Segment-specific estimates of the theoretical resource were multiplied by the corresponding recovery factor to estimate

Jacobson, Paul T. [Electric Power Research Institute; Ravens, Thomas M. [University of Alaska Anchorage; Cunningham, Keith W. [University of Alaska Fairbanks; Scott, George [National Renewable Energy Laboratory

2012-12-14T23:59:59.000Z

206

Laboratory Experiments on the Effects of Blade Strike from Hydrokinetic Energy Technologies on Larval and Juvenile Freshwater Fishes  

DOE Green Energy (OSTI)

There is considerable interest in the development of marine and hydrokinetic energy projects in rivers, estuaries, and coastal ocean waters of the United States. Hydrokinetic (HK) technologies convert the energy of moving water in river or tidal currents into electricity, without the impacts of dams and impoundments associated with conventional hydropower or the extraction and combustion of fossil fuels. The Federal Energy Regulatory Commission (FERC) maintains a database that displays the geographical distribution of proposed HK projects in inland and tidal waters (FERC 2012). As of March 2012, 77 preliminary permits had been issued to private developers to study HK projects in inland waters, the development of which would total over 8,000 MW. Most of these projects are proposed for the lower Mississippi River. In addition, the issuance of another 27 preliminary permits for HK projects in inland waters, and 3 preliminary permits for HK tidal projects (totaling over 3,100 MW) were under consideration by FERC. Although numerous HK designs are under development (see DOE 2009 for a description of the technologies and their potential environmental effects), the most commonly proposed current-based projects entail arrays of rotating devices, much like submerged wind turbines, that are positioned in the high-velocity (high energy) river channels. The many diverse HK designs imply a diversity of environmental impacts, but a potential impact common to most is the risk for blade strike to aquatic organisms. In conventional hydropower generation, research on fish passage through reaction turbines at low-head dams suggested that strike and mortality for small fish could be low. As a consequence of the large surface area to mass ratio of small fish, the drag forces in the boundary layer flow at the surface of a rotor blade may pull small fish around the leading edge of a rotor blade without making physical contact (Turnpenny 1998, Turnpenny et al. 2000). Although there is concern that small, fragile fish early life stages may be unable to avoid being struck by the blades of hydrokinetic turbines, we found no empirical data in the published literature that document survival of earliest life-stage fish in passage by rotor blades. In addition to blade strike, research on passage of fish through conventional hydropower turbines suggested that fish mortalities from passage through the rotor swept area could also occur due to shear stresses and pressure chances in the water column (Cada et al. 1997, Turnpenny 1998). However, for most of the proposed HK turbine designs the rotors are projected to operate a lower RPM (revolutions per minute) than observed from conventional reaction turbines; the associated shear stress and pressure changes are expected to be lower and pose a smaller threat to fish survival (DOE 2009). Only a limited number of studies have been conducted to examine the risk of blade strike from hydrokinetic technologies to fish (Turnpenny et al. 1992, Normandeau et al. 2009, Seitz et al. 2011, EPRI 2011); the survival of drifting or weakly swimming fish (especially early life stages) that encounter rotor blades from hydrokinetic (HK) devices is currently unknown. Our study addressed this knowledge gap by testing how fish larvae and juveniles encountered different blade profiles of hydrokinetic devices and how such encounters influenced survivorship. We carried out a laboratory study designed to improve our understanding of how fish larvae and juvenile fish may be affected by encounters with rotor blades from HK turbines in the water column of river and ocean currents. (For convenience, these early life stages will be referred to as young of the year, YOY). The experiments developed information needed to quantify the risk (both probability and consequences) of rotor-blade strike to YOY fish. In particular, this study attempted to determine whether YOY drifting in a high-velocity flow directly in the path of the blade leading edge will make contact with the rotor blade or will bypass the blade while entrained in the boundary l

Schweizer, Peter E [ORNL; Cada, Glenn F [ORNL; Bevelhimer, Mark S [ORNL

2012-03-01T23:59:59.000Z

207

FFP/NREL Collaboration on Hydrokinetic River Turbine Testing: Cooperative Research and Development Final Report, CRADA Number CRD-12-00473  

DOE Green Energy (OSTI)

This shared resources CRADA defines collaborations between the National Renewable Energy Laboratory (NREL) and Free Flow Power (FFP) set forth in the following Joint Work Statement. Under the terms and conditions described in this CRADA, NREL and FFP will collaborate on the testing of FFP's hydrokinetic river turbine project on the Mississippi River (baseline location near Baton Rouge, LA; alternate location near Greenville, MS). NREL and FFP will work together to develop testing plans, instrumentation, and data acquisition systems; and perform field measurements.

Driscoll, F.

2013-04-01T23:59:59.000Z

208

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

209

Upper-Ocean Salinity Variability in the Tropical Pacific: Case Study for Quasi-Decadal Shift during the 2000s Using TRITON Buoys and Argo Floats  

Science Conference Proceedings (OSTI)

Upper-ocean salinity variation in the tropical Pacific is investigated during the 2000s, when TRITON buoys and Argo floats were deployed and more salinity data were observed than in previous periods. We focus on upper-ocean salinity variability ...

Takuya Hasegawa; Kentaro Ando; Iwao Ueki; Keisuke Mizuno; Shigeki Hosoda

210

Subinertial Frequency Response of Wind-Driven Currents in the Mixed layer Measured by Drifting Buoys in the Midlatitude North Pacific  

Science Conference Proceedings (OSTI)

Previous analyses of satellite-tracked drifting buoy data (30 m drogue depth) and Fleet Numerical Ocean Center (FNOC) surface wind stress in the midlatitude North Pacific during autumn/winter have shown near-surface current vectors 25° to the ...

Gerard J. McNally; Douglas S. Luther; Warren B. White

1989-03-01T23:59:59.000Z

211

A Climatology of Diurnal and Semidiurnal Surface Wind Variations over the Tropical Pacific Ocean Based on the Tropical Atmosphere Ocean Moored Buoy Array  

Science Conference Proceedings (OSTI)

Hourly measurements from 51 moored buoys in the Tropical Atmosphere Ocean array (9°N–8°S, 165°E–95°W) during 1993–2004 are used to document the climatological seasonal and annual mean patterns of diurnal and semidiurnal near-surface wind ...

Rei Ueyama; Clara Deser

2008-02-01T23:59:59.000Z

212

MHK Technologies | Open Energy Information  

Open Energy Info (EERE)

MHK Technologies MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Click one of the following Marine Hydrokinetic Technologies for more information: Loading... 14 MW OTECPOWER Aegir Dynamo AirWEC Anaconda bulge tube drives turbine AquaBuoy Aquanator Aquantis Archimedes Wave Swing Atlantis AN 150 Atlantis AR 1000 Atlantis AS 400 Atlantisstrom BOLT Lifesaver Benkatina Turbine Blue Motion Energy marine turbine Bluetec Brandl Generator C Plane C Wave C5 CETO Wave Energy Technology Centipod Closed Cycle OTEC CoRMaT Cross Flow Turbine Current Catcher Current Electric Generator Current Power CurrentStar DEXA Wave Converter Davidson Hill Venturi DHV Turbine Deep Gen Tidal Turbines Deep Green Deep Ocean Water Application Facility DOWAF Deep Water Pipelines Deep water capable hydrokinetic turbine

213

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.

214

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

215

Deployment Effects of Marine Renewable Energy Technologies: Wave Energy Scenarios  

SciTech Connect

Given proper care in siting, design, deployment, operation and maintenance, wave energy conversion could become one of the more environmentally benign sources of electricity generation. In order to accelerate the adoption of these emerging hydrokinetic and marine energy technologies, navigational and environmental concerns must be identified and addressed. All developing hydrokinetic projects involve a wide variety of stakeholders. One of the key issues that site developers face as they engage with this range of stakeholders is that, due to a lack of technical certainty, many of the possible conflicts (e.g., shipping and fishing) and environmental issues are not well-understood,. In September 2008, re vision consulting, LLC was selected by the Department of Energy (DoE) to apply a scenario-based assessment to the emerging hydrokinetic technology sector in order to evaluate the potential impact of these technologies on the marine environment and navigation constraints. The project’s scope of work includes the establishment of baseline scenarios for wave and tidal power conversion at potential future deployment sites. The scenarios capture variations in technical approaches and deployment scales to properly identify and characterize environmental effects and navigational effects. The goal of the project is to provide all stakeholders with an improved understanding of the potential range of technical attributes and potential effects of these emerging technologies and focus all stakeholders on the critical issues that need to be addressed. By identifying and addressing navigational and environmental concerns in the early stages of the industry’s development, serious mistakes that could potentially derail industry-wide development can be avoided. This groundwork will also help in streamlining siting and associated permitting processes, which are considered key hurdles for the industry’s development in the U.S. today. Re vision is coordinating its efforts with two other project teams funded by DoE which are focused on regulatory issues (Pacific Energy Ventures) and navigational issues (PCCI). The results of this study are structured into three reports: (1) Wave power scenario description (2) Tidal power scenario description (3) Framework for Identifying Key Environmental Concerns This is the first report in the sequence and describes the results of conceptual feasibility studies of wave power plants deployed in Humboldt County, California and Oahu, Hawaii. These two sites contain many of the same competing stakeholder interactions identified at other wave power sites in the U.S. and serve as representative case studies. Wave power remains at an early stage of development. As such, a wide range of different technologies are being pursued by different manufacturers. In order to properly characterize potential effects, it is useful to characterize the range of technologies that could be deployed at the site of interest. An industry survey informed the process of selecting representative wave power devices. The selection criteria requires that devices are at an advanced stage of development to reduce technical uncertainties, and that enough data are available from the manufacturers to inform the conceptual design process of this study. Further, an attempt is made to cover the range of different technologies under development to capture variations in potential environmental effects. Table 1 summarizes the selected wave power technologies. A number of other developers are also at an advanced stage of development, but are not directly mentioned here. Many environmental effects will largely scale with the size of the wave power plant. In many cases, the effects of a single device may not be measurable, while larger scale device arrays may have cumulative impacts that differ significantly from smaller scale deployments. In order to characterize these effects, scenarios are established at three deployment scales which nominally represent (1) a small pilot deployment, (2) a small commercial deployment, and (3) a large commercial sc

Mirko Previsic

2010-06-17T23:59:59.000Z

216

Screening Analysis for the Environmental Risk Evaluation System Task 2.1.1.2: Evaluating Effects of Stressors Fiscal Year 2011 Progress Report - Environmental Effects of Marine and Hydrokinetic Energy  

SciTech Connect

Potential environmental effects of marine and hydrokinetic (MHK) energy development are not well understood, and yet regulatory agencies are required to make decisions in spite of substantial uncertainty about environmental impacts and their long-term consequences. An understanding of risks associated with interactions between MHK installations and aquatic receptors, including animals, habitats, and ecosystems, can help define key uncertainties and focus regulatory actions and scientific studies on interactions of most concern. As a first step in developing the Pacific Northwest National Laboratory (PNNL) Environmental Risk Evaluation System (ERES), PNNL scientists conducted a preliminary risk screening analysis on three initial MHK cases. During FY 2011, two additional cases were added: a tidal project in the Gulf of Maine using Ocean Renewable Power Company TidGenTM turbines and a wave project planned for the coast of Oregon using Aquamarine Oyster surge devices. Through an iterative process, the screening analysis revealed that top-tier stressors in the two FY 2011 cases were the dynamic effects of the device (e.g., strike), accidents/disasters, and effects of the static physical presence of the device (e.g., habitat alteration). Receptor interactions with these stressors at the highest tiers of risk were dominated by threatened and endangered animals. Risk to the physical environment from changes in flow regime also ranked high. Peer review of this process and results will be conducted in early FY 2012. The ERES screening analysis provides an analysis of vulnerability of environmental receptors to stressors associated with MHK installations, probability analysis is needed to determine specific risk levels to receptors. “Risk” has two components: (1) The likelihood, or “probability”, of the occurrence of a given interaction or event, and (2) the potential “consequence” if that interaction or event were to occur. During FY 2011, the ERES screening analysis focused primarily on the second component of risk, “consequence”, with focused probability analysis for interactions where data was sufficient for probability modeling. Consequence analysis provides an assessment of vulnerability of environmental receptors to stressors associated with MHK installations. Probability analysis is needed to determine specific risk levels to receptors and requires significant data inputs to drive risk models. During FY 2011, two stressor-receptor interactions were examined for the probability of occurrence. The two interactions (spill probability due to an encounter between a surface vessel and an MHK device; and toxicity from anti-biofouling paints on MHK devices) were seen to present relatively low risks to marine and freshwater receptors of greatest concern in siting and permitting MHK devices. A third probability analysis was scoped and initial steps taken to understand the risk of encounter between marine animals and rotating turbine blades. This analysis will be completed in FY 2012.

Copping, Andrea E.; Blake, Kara M.; Anderson, Richard M.; Zdanski, Laura C.; Gill, Gary A.; Ward, Jeffrey A.

2011-09-01T23:59:59.000Z

217

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

DOE Green Energy (OSTI)

This paper describes a recent study to investigate the applicability of a horizontal-axis wind turbine (HAWT) structural dynamics and unsteady aerodynamics analysis program (FAST and AeroDyn respectively) to modeling the forces on marine hydrokinetic (MHK) turbines. This paper summarizes the added mass model that has been added to AeroDyn. The added mass model only includes flow acceleration perpendicular to the rotor disc, and ignores added mass forces caused by blade deflection. A model of the National Renewable Energy Laboratory's (NREL) Unsteady Aerodynamics Experiment (UAE) Phase VI wind turbine was analyzed using FAST and AeroDyn with sea water conditions and the new added mass model. The results of this analysis exhibited a 3.6% change in thrust for a rapid pitch case and a slight change in amplitude and phase of thrust for a case with 30{sup o} of yaw.

Maniaci, D. C.; Li, Y.

2011-10-01T23:59:59.000Z

218

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

DOE Green Energy (OSTI)

This paper describes a recent study to investigate the applicability of a horizontal-axis wind turbine (HAWT) structural dynamics and unsteady aerodynamics analysis program (FAST and AeroDyn respectively) to modeling the forces on marine hydrokinetic (MHK) turbines. It summarizes the added mass model that has been added to AeroDyn. The added mass model only includes flow acceleration perpendicular to the rotor disc, and ignores added mass forces caused by blade deflection. A model of the National Renewable Energy Laboratory's (NREL) Unsteady Aerodynamics Experiment (UAE) Phase VI wind turbine was analyzed using FAST and AeroDyn with sea water conditions and the new added mass model. The results of this analysis exhibited a 3.6% change in thrust for a rapid pitch case and a slight change in amplitude and phase of thrust for a case with 30 degrees of yaw.

Maniaci, D. C.; Li, Y.

2012-04-01T23:59:59.000Z

219

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.

220

Calculation of Extreme Wave Loads on Coastal Highway Bridges  

E-Print Network (OSTI)

Coastal bridges are exposed to severe wave, current and wind forces during a hurricane. Most coastal bridges are not designed to resist wave loads in such extreme situations, and there are no existing analytical methods to calculate wave loads on coastal highway bridges. This study focuses on developing a new scheme to estimate the extreme wave loads on bridges for designing purpose. In order to do this, a 2D wave velocity potential model (2D Model) is set up for the deterministic analysis of wave force on bridge decks. 2D Model is a linear wave model, which has the capability of calculating wave velocity potential components in time domain based on wave parameters such as wave height, wave period and water depth, and complex structural geometries. 2D Model has Laplace equation as general equation. The free surface boundary, incoming and outgoing wave boundary conditions are linearized, decomposed first, and then solved by the finite difference method. Maximum wave forces results calculated by the linear 2D Model are compared with results from CFD software Flow3D that is using Navier Stokes theory up to the 5th order; and 2D Model is validated by comparing results with experiment data. A case study is conducted for calculating extreme wave forces on I-10 Bridge across Escambia Bay, Florida during Hurricane Ivan in September 2004.SWAN model is adapted to investigate the parameters of wave heights and wave periods around bridge sites. SWAN model has the capability of predicting or hindcasting significant wave heights and wave periods as long as the domain and input parameters are given. The predicted significant wave heights are compared with measurements by Buoy Station 42039 and 42040 nearest to Escambia Bay. A new prediction equation of maximum uplift wave forces on bridge decks is developed in terms of wave height, wave period, water depth, bridge width, water clearance and over top water load. To develop the equations, the relationship is investigated between maximum uplift wave forces and wave parameters, water clearance, green water effects and bridge width. 2D Model is used for up to 1886 cases with difference parameters. Flow3D model is adopted to determine coefficients of water clearance and green water effects, which cannot be calculated by 2D Model.

Meng, Bo

2008-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Comparison of Buoy-Mounted 75-kHz Acoustic Doppler Current Profilers with Vector-Measuring Current Meters  

Science Conference Proceedings (OSTI)

Long time series of atmospheric parameters and limited oceanographic parameters such as near-surface temperature and wave statistics have been available for some time. There is, however, a need for similar observations of currents in the coastal ...

Clinton Winant; Theodore Mettlach; Sigurd Larson

1994-10-01T23:59:59.000Z

222

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.

223

Review of Recent Literature Relevant to the Environmental Effects of Marine and Hydrokinetic Energy Devices Task 2.1.3: Effects on Aquatic Organisms – Fiscal Year 2011 Progress Report Environmental Effects of Marine and Hydrokinetic Energy  

SciTech Connect

A literature search was conducted by using the Web of Science® Databases component of the ISI Web of KnowledgeSM to identify recent articles that would be useful to help assess the potential environmental effects of renewable energy development in the ocean, with emphasis on marine mammals, seabirds, and fish. Several relatively recent general review articles that included possible effects of marine renewable energy devices on marine mammals and seabirds were examined to begin the search process (e.g., Boehlert et al. 2008; Thompson et al. 2008; Simas et al. 2009). From these articles, several general topics of potential environmental effects on marine mammals, seabirds, and fish were derived. These topics were used as the primary search factors. Searches were conducted with reference to the potential effects of offshore wind farms and MHK devices on marine mammals, seabirds, and fish. Additional sources were identified by cross-checking the Web of Science databases for articles that cited the review articles. It also became clear that often the potential effects were offered as hypotheses that often were not supported by the presentation of appropriate documentation. Therefore, the search was refined and focused on trying to obtain the necessary information to support or challenge a proposed potential effect to a specific concern. One of the expressed concerns regarding MHK devices is that placing wave parks in coastal waters could compromise the migration patterns of whales. Disruption of the annual migration of the gray whale (Eschrichtius robustus), which swims at least 30,000 km on its round trip from breeding grounds in Baja California to feeding areas in the Bering Sea, is of particular concern. Among the hypothesized effects on the migrating gray whales are increased predation risk by constricting migration corridor to between array and shore or by forcing the whales to swim into deeper waters, increased metabolic energy costs and delays in reaching the destinations, and interrupting feeding by blocking access to benthic areas under arrays. The literature search focused on identifying published studies that could provide information to evaluate these concerns. The results were developed into a case study that evaluated the potential effects of the placement of wave parks in coastal waters along the migration route of the gray whale. Wave parks and other MHK arrays may have additional effects on gray whales and other marine mammals, including entanglement in mooring lines and interference with communications among other effects, that were not included in this case study. The case study results were rewritten into a simpler form that would be suitable for placement on a web blog

Kropp, Roy K.

2011-09-30T23:59:59.000Z

224

Wave Energy  

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

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.)

225

Effects of Electromagnetic Fields on Fish and Invertebrates Task 2.1.3: Effects on Aquatic Organisms Fiscal Year 2012 Progress Report Environmental Effects of Marine and Hydrokinetic Energy  

SciTech Connect

Energy generated by the world’s oceans and rivers offers the potential to make substantial contributions to the domestic and global renewable energy supply. However, the marine and hydrokinetic (MHK) energy industry faces challenges related to siting, permitting, construction, and operation of pilotand commercial-scale facilities. One of the challenges is to understand the potential effects to marine organisms from electromagnetic fields, which are produced as a by-product of transmitting power from offshore to onshore locations through underwater transmission cables. This report documents the progress of the third year of research (fiscal year 2012) to investigate environmental issues associated with marine and hydrokinetic energy (MHK) generation. This work was conducted by Pacific Northwest National Laboratory (PNNL) for the U.S. Department of Energy’s (DOE’s) Office of Energy Efficiency and Renewable Energy (EERE) Wind and Water Technologies Office. The report addresses the effects of electromagnetic fields (EMFs) on selected marine species where significant knowledge gaps exist. The species studied this fiscal year included one fish and two crustacean species: the Atlantic halibut (Hippoglossus hippoglossus), Dungeness crab (Metacarcinus magister), and American lobster (Homarus americanus).

Woodruff, Dana L.; Cullinan, Valerie I.; Copping, Andrea E.; Marshall, Kathryn E.

2013-05-20T23:59:59.000Z

226

Idaho National Laboratory - Hydropower Program: Bibliography  

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

Aspects General Environmental Research Hydrokinetic & Wave Technologies Hydropower Facts Research and Development Resource Assessment Technology Transfer Virtual...

227

Ship Waves and Lee Waves  

Science Conference Proceedings (OSTI)

Three-dimensional internal trapped lee wave modes produced by an isolated obstacle in a stratified fluid are shown to have dynamics analogous to surface ship waves on water of finite depth. Two models which allow for vertical trapping of wave ...

R. D. Sharman; M. G. Wurtele

1983-02-01T23:59:59.000Z

228

Wave-actuated power take-off device for electricity generation  

Science Conference Proceedings (OSTI)

Since 2008, Resolute Marine Energy, Inc. (RME) has been engaged in the development of a rigidly moored shallow-water point absorber wave energy converter, the "3D-WEC". RME anticipated that the 3D-WEC configuration with a fully buoyant point absorber buoy coupled to three power take off (PTO) units by a tripod array of tethers would achieve higher power capture than a more conventional 1-D configuration with a single tether and PTO. The investigation conducted under this program and documented herein addressed the following principal research question regarding RME'Â?Â?s power take off (PTO) concept for its 3D-WEC: Is RME's winch-driven generator PTO concept, previously implemented at sub-scale and tested at the Ohmsett wave tank facility, scalable in a cost-effective manner to significant power levels Â?Â?e.g., 10 to 100kW?

Chertok, Allan

2013-01-31T23:59:59.000Z

229

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":""}]}

230

Property:Project(s) where this technology is utilized | Open Energy  

Open Energy Info (EERE)

Project(s) where this technology is utilized Project(s) where this technology is utilized Jump to: navigation, search Property Name Project(s) where this technology is utilized Property Type Page Marine and Hydrokinetic Technology Project Pages using the property "Project(s) where this technology is utilized" Showing 25 pages using this property. (previous 25) (next 25) M MHK Technologies/AirWEC + MHK Projects/Ocean Trials Ver 2 + MHK Technologies/AquaBuoy + MHK Projects/Figueira da Foz Portugal +, MHK Projects/Humboldt County Wave Project +, MHK Projects/Makah Bay Offshore Wave Pilot Project +, ... MHK Technologies/Archimedes Wave Swing + MHK Projects/AWS II +, MHK Projects/Portugal Pre Commercial Pilot Project + MHK Technologies/Atlantis AN 150 + MHK Projects/Gujarat + MHK Technologies/Atlantis AR 1000 + MHK Projects/Castine Harbor Badaduce Narrows +, MHK Projects/Gujarat +, MHK Projects/Tidal Energy Device Evaluation Center TIDEC +

231

Marine & Hydrokinetic Technologies (Fact Sheet)  

DOE Green Energy (OSTI)

This document described the U.S. Department of Energy's Water Power Program efforts to promote the development and deployment of advanced water power devices.

Not Available

2011-07-01T23:59:59.000Z

232

Oceanic Internal Waves Are Not Weak Waves  

Science Conference Proceedings (OSTI)

It is shown that the oceanic internal wave field is too energetic by roughly two orders of magnitude to be treated theoretically as an assemblage of weakly interacting waves. This may be seen both from recent weak wave theoretical calculations ...

Greg Holloway

1980-06-01T23:59:59.000Z

233

SeaVolt Technologies formerly Sea Power Associates | Open Energy  

Open Energy Info (EERE)

SeaVolt Technologies formerly Sea Power Associates SeaVolt Technologies formerly Sea Power Associates Jump to: navigation, search Name SeaVolt Technologies (formerly Sea Power & Associates) Place San Francisco, California Zip CA 94111 Sector Ocean Product The company's Wave Rider system, which is still in prototype stages, uses buoys and hydraulic pumps to convert the movement of ocean waves into electricity. References SeaVolt Technologies (formerly Sea Power & Associates)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This article is a stub. You can help OpenEI by expanding it. SeaVolt Technologies (formerly Sea Power & Associates) is a company located in San Francisco, California .

234

Property:Draft (m) | Open Energy Information  

Open Energy Info (EERE)

Draft (m) Draft (m) Jump to: navigation, search Property Name Draft (m) Property Type String Pages using the property "Draft (m)" Showing 25 pages using this property. (previous 25) (next 25) M MHK Technologies/Aegir Dynamo + 8 + MHK Technologies/Deep Green + 40 + MHK Technologies/Deep water capable hydrokinetic turbine + 5 + MHK Technologies/Electric Buoy + 7 + MHK Technologies/European Pico Pilot Plant + 7 + MHK Technologies/Evopod E35 + 5 + MHK Technologies/Float Wave Electric Power Station + 7 + MHK Technologies/Floating anchored OTEC plant + 530 + MHK Technologies/HyPEG + 20 + MHK Technologies/HydroGen 10 + 1 + MHK Technologies/Hydroflo + 2 + MHK Technologies/ITRI WEC + 13 + MHK Technologies/Microturbine River In Stream + 0.7 + MHK Technologies/OCEANTEC Wave Energy Converter + 5.25 +

235

Property:Length (m) | Open Energy Information  

Open Energy Info (EERE)

(m) (m) Jump to: navigation, search Property Name Length (m) Property Type Number Pages using the property "Length (m)" Showing 25 pages using this property. (previous 25) (next 25) M MHK Technologies/AirWEC + 0 + MHK Technologies/CurrentStar + 30.5 + MHK Technologies/Deep Green + 4 + MHK Technologies/Deep water capable hydrokinetic turbine + 5 + MHK Technologies/Electric Buoy + 10 + MHK Technologies/European Pico Pilot Plant + 20 + MHK Technologies/Evopod E35 + 12.5 + MHK Technologies/Float Wave Electric Power Station + 12 + MHK Technologies/Floating anchored OTEC plant + 60 + MHK Technologies/HyPEG + 50 + MHK Technologies/HydroGen 10 + 4.5 + MHK Technologies/Hydroflo + 7 + MHK Technologies/ITRI WEC + 6 + MHK Technologies/IVEC Floating Wave Power Plant + 150 +

236

Property:Freeboard (m) | Open Energy Information  

Open Energy Info (EERE)

Freeboard (m) Freeboard (m) Jump to: navigation, search Property Name Freeboard (m) Property Type Number Pages using the property "Freeboard (m)" Showing 25 pages using this property. (previous 25) (next 25) M MHK Technologies/Aegir Dynamo + 4 + MHK Technologies/AirWEC + 0.25 + MHK Technologies/CurrentStar + 3.65 + MHK Technologies/Deep Green + 0 + MHK Technologies/Deep water capable hydrokinetic turbine + 0 + MHK Technologies/Electric Buoy + 3 + MHK Technologies/European Pico Pilot Plant + 15 + MHK Technologies/Evopod E35 + 1.5 + MHK Technologies/Float Wave Electric Power Station + 5 + MHK Technologies/Floating anchored OTEC plant + 10 + MHK Technologies/GyroWaveGen + 3 + MHK Technologies/HydroGen 10 + 2.5 + MHK Technologies/Hydroflo + 2 + MHK Technologies/ITRI WEC + 4.9 +

237

Wave–Wave Interaction of Unstable Baroclinic Waves  

Science Conference Proceedings (OSTI)

Two slightly unstable baroclinic waves in the two-layer Phillips model are allowed to interact with each other as well as the mean flow. A theory for small dissipation rates is developed to examine the role of wave–wave interaction in the ...

Joseph Pedlosky; Lorenzo M. Polvani

1987-02-01T23:59:59.000Z

238

MHK Projects/US Navy Wave Energy Technology WET Program at Marine...  

Open Energy Info (EERE)

of Devices Deployed 6 Number of Build Out Units Deployed 7 Main Overseeing Organization Ocean Power Technologies Project Technology *MHK TechnologiesPowerBuoy Project Timeline and...

239

A Thunderstorm Bow Wave  

Science Conference Proceedings (OSTI)

The thunderstorm solitary gust or bow wave, observed by Doviak and Ge, is examined from the viewpoint of boundary layer wave theory. It is concluded that all its well defined characteristics are consistently modeled as a bow wave of ducted ...

G. Chimonas; Carmen J. Nappo

1987-02-01T23:59:59.000Z

240

The Sandia Wave Reflector  

The Sandia wave reflector is a magnetic conductor for wireless transmissions near 433 MHz. The device reflects perpendicular electromagnetic waves in-phase and suppresses surface waves resulting in improved gain performance and effective operation ...

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Geostrophic Shock Waves  

Science Conference Proceedings (OSTI)

Organized depth discontinuities involving a balance between steepening and dissipation are usually referred to as shock waves. An analytical “educed gravity” model is used to examine a special kind of shock wave. The wave under study is a depth ...

Doron Nof

1986-05-01T23:59:59.000Z

242

Aqua Magnetics Inc | Open Energy Information  

Open Energy Info (EERE)

Magnetics Inc Magnetics Inc Jump to: navigation, search Name Aqua-Magnetics Inc Place Satellite Beach, Florida Zip 32937 Sector Ocean Product Manufactures patented system that converts ocean wave energy into electric power. References Aqua-Magnetics Inc[1] 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: Electric Buoy Mobil Stabilized Energy Conversion Platform Platform generators This article is a stub. You can help OpenEI by expanding it. Aqua-Magnetics Inc is a company located in Satellite Beach, Florida . References ↑ "Aqua-Magnetics Inc" Retrieved from "http://en.openei.org/w/index.php?title=Aqua_Magnetics_Inc&oldid=678881"

243

Property:Width (m) | Open Energy Information  

Open Energy Info (EERE)

Width (m) Width (m) Jump to: navigation, search Property Name Width (m) Property Type Number Pages using the property "Width (m)" Showing 25 pages using this property. (previous 25) (next 25) M MHK Technologies/Aegir Dynamo + 4.5 + MHK Technologies/AirWEC + 2.5 + MHK Technologies/CurrentStar + 30.5 + MHK Technologies/Deep Green + 12 + MHK Technologies/Deep water capable hydrokinetic turbine + 10 + MHK Technologies/ECO Auger + 4.877 + MHK Technologies/Electric Buoy + 10 + MHK Technologies/European Pico Pilot Plant + 14 + MHK Technologies/Evopod E35 + 4.5 + MHK Technologies/Float Wave Electric Power Station + 2.5 + MHK Technologies/Floating anchored OTEC plant + 60 + MHK Technologies/HyPEG + 50 + MHK Technologies/HydroGen 10 + 2 + MHK Technologies/Hydroflo + 5 +

244

Modeling and Analysis of the Wind-Waves Field Variability in the Indian Ocean During 1998-2009 Years  

E-Print Network (OSTI)

To calculate the wind-waves in the Indian Ocean (IO), the wind field for the period from 1998 to 2009 was used, obtained from the NCEP/NOAA archive, and numerical model WAM (Cycle-4) was applied, modified by the new source function proposed in Polnikov (2005). Based on buoy data for the Indian Ocean, the fitting of the modified model WAM was done, which provides the win in accuracy of calculations on 35%, in comparison with the original model. All the further calculations of the wave fields in IO were made for these model settings. At the first stage, the analysis of the simulation results involves a) mapping the fields of the significant wave height and the wave energy , calculated with different scales of averaging in time T and space R; b) estimating the fields of seasonal, annual and long-term variability; and c) determining the 12-year trend of the annually averaged fields. The analysis was carried out taking into account the previously introduced zoning the ocean area, provided by the spatial inhomogen...

Polnikov, V G; Sannasiraj, S A; Sundar, V

2011-01-01T23:59:59.000Z

245

Fundamental Guided Wave Metrology  

Science Conference Proceedings (OSTI)

Fundamental Guided Wave Metrology. Summary: ... The program is focused on fundamental measurement research for microwave parameters. ...

2010-10-05T23:59:59.000Z

246

Watching Gravitational Waves  

E-Print Network (OSTI)

In the vicinity of merging neutron strar binaries or supernova remnants, gravitational waves can interact with the prevailing strong magnetic fields. The resulting partial conversion of gravitational waves into electromagnetic (radio) waves might prove to be an indirect way of detecting gravitational waves from such sources. Another interesting interaction considered in this article is the excitation of magnetosonic plasma waves by a gravitational wave passing through the surrounding plasma. The transfer of gravitational wave energy into the plasma might help to fuel the `fireball' of electromagnetic radiation observed in gamma ray bursts. In the last section of the article, a dispersion relation is derived for such magnetosonic plasma waves driven by a gravitational wave.

Joachim Moortgat

2001-04-02T23:59:59.000Z

247

CX-000900: Categorical Exclusion Determination | Department of...  

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

Determination CX-000900: Categorical Exclusion Determination An Assessment of Projected Life-Cycle Cost for Wave, Tidal, Ocean Current, and In-Stream Hydrokinetic Power in the...

248

Energy Information Administration  

U.S. Energy Information Administration (EIA)

New hydrokinetic energy technologies that generate electricity by harnessing the energy from ocean waves, tides, and river currents are advancing toward commercial ...

249

HYDROMATRIX? Product Information  

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

Potential and Known Environmental Concerns Low Impact Hydro at Existing Structures Presentation at Hydrokinetic and Wave Energy Technologies Technical and Environmental Issues...

250

HYDROMATRIX? Product Information  

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

2005 VA TECH HYDRO Presentation at Hydrokinetic and Wave Energy Technologies Technical and Environmental Issues Workshop October 26-28, 2005 Alexander Bihlmayer Innovative...

251

OES-IA Annex IV: Environmental Effects of Marine and Hydrokinetic Devices - Report from the Experts’ Workshop September 27th – 28th 2010 Clontarf Castle, Dublin Ireland  

SciTech Connect

An experts' workshop was convened in Dublin Ireland September 27th – 28th 2010 in support of IEA Ocean Energy Systems Implementing Agreement Annex IV. PNNL was responsible for organizing the content of the workshop, overseeing the contractors (Irish Marine Institute) hosting the event, presenting material on Annex IV and materials applicable to the workshop intent. PNNL is also overseeing a contractor (Wave Energy Center/University of Plymouth – WEC/UP) in the collection and analysis of the Annex IV data. Fifty-eight experts from 8 countries attended the workshop by invitation, spending two days discussing the needs of Annex IV. Presentations by DOE (background on Annex IV), PNNL (process for developing Annex IV; presentation of the draft database for PNNL project, plans for incorporating Annex IV data), WEC/UP on the environmental effect matrix, and four MHK developers (two from the UK, one from Ireland and one from Sweden; each discussing their own projects and lessons learned for measuring and mitigating environmental effects, as well as interactions with consenting [permitting] processes) helped provide background. The workshop participants worked part of the time in the large group and most of the time in four smaller breakout groups. Participants engaged in the process and provided a wealth of examples of MHK environmental work, particularly in the European nations. They provided practical and actionable advice on the following: • Developing the Annex IV database, with specific uses and audiences • Strong consensus that we should collect detailed metadata on available data sets, rather than attempting to draw in copious datasets. The participants felt there would then be an opportunity to then ask for specific set of data as needed, with specific uses and ownership of the data specified. This is particularly important as many data collected, particularly in Europe but also in Canada, are proprietary; developers were not comfortable with the idea of handing over all their environmental effects data, but all said they would entertain the request if they specifics were clear. • The recommendation was to collect metadata via an online interactive form, taking no more than one hour to complete. • Although the idea of cases representing the “best practices” was recognized as useful, the participants pointed out that there are currently so few MHK projects in the water, that any and all projects were appropriate to highlight as “cases”. There was also discomfort at the implication that “best practices” implied “lesser practices”; this being unhelpful to a new and emerging industry. • Workshop participants were asked if they were willing to continue to engage in the Annex IV process; all expressed willingness. The workshop was successful in adequately addressing its objectives and through participation and interaction in the breakout sessions around the various topics. As a result of the workshop, many delegates are now better informed and have a greater understanding of the potential environmental effects of MHK devices on the marine environment. There is now a greater sense of understanding of the issues involved and consensus by those regulators, developers and scientists who attended the workshop. A strong network has also been built over the two days between European and US/Canadian technical experts in wave and tidal energy.

Copping, Andrea E.; O'Toole, Michael J.

2010-12-02T23:59:59.000Z

252

Effects of Electromagnetic Fields on Fish and Invertebrates: Task 2.1.3: Effects on Aquatic Organisms - Fiscal Year 2011 Progress Report - Environmental Effects of Marine and Hydrokinetic Energy  

Science Conference Proceedings (OSTI)

This fiscal year (FY) 2011 progress report (Task 2.1.3 Effects on Aquatic Organisms, Subtask 2.3.1.1 Electromagnetic Fields) describes studies conducted by PNNL as part of the DOE Wind and Water Power Program to examine the potential effects of electromagnetic fields (EMF) from marine and hydrokinetic devices on aquatic organisms, including freshwater and marine fish and marine invertebrates. In this report, we provide a description of the methods and results of experiments conducted in FY 2010-FY 2011 to evaluate potential responses of selected aquatic organisms. Preliminary EMF laboratory experiments during FY 2010 and 2011 entailed exposures with representative fish and invertebrate species including juvenile coho salmon (Oncorhynchus kisutch), Atlantic halibut (Hippoglossus hippoglossus), California halibut (Paralicthys californicus), rainbow trout (Oncorhynchus mykiss), and Dungeness crab (Metacarcinus magister). These species were selected for their ecological, commercial, and/or recreational importance, as well as their potential to encounter an MHK device or transmission cable during part or all of their life cycle. Based on previous studies, acute effects such as mortality were not expected to occur from EMF exposures. Therefore, our measurement endpoints focused on behavioral responses (e.g., detection of EMF, interference with feeding behavior, avoidance or attraction to EMF), developmental changes (i.e., growth and survival from egg or larval stage to juvenile), and exposure markers indicative of physiological responses to stress. EMF intensities during the various tests ranged from 0.1 to 3 millitesla, representing a range of upper bounding conditions reported in the literature. Experiments to date have shown there is little evidence to indicate distinct or extreme behavioral responses in the presence of elevated EMF for the species tested. Several developmental and physiological responses were observed in the fish exposures, although most were not statistically significant. Additional species are currently planned for laboratory testing in the next fiscal year (e.g. an elasmobranch, American lobster) to provide a broader assessment of species important to stakeholders. The collective responses of all species will be assessed in terms of life stage, exposure scenarios, and biological relevance, to address current uncertainties related to effects of EMF on aquatic organisms.

Woodruff, Dana L.; Schultz, Irvin R.; Marshall, Kathryn E.; Ward, Jeffrey A.; Cullinan, Valerie I.

2012-05-01T23:59:59.000Z

253

Gravity Waves from Thunderstorms  

Science Conference Proceedings (OSTI)

Gravity waves generated by severe thunderstorms in the eastern Ohio-Pennsylvania area were recorded by an array of microbarovariographs at Palisades, New York and by standard microbarographs across northeastern United States. The waves were ...

Nambath K. Balachandran

1980-06-01T23:59:59.000Z

254

The Effect of Wave Breaking on the Wave Energy Spectrum  

Science Conference Proceedings (OSTI)

The effect of wave breaking on the wave energy spectral shape is examined. The Stokes wave-breaking criterion is first extended to random waves and a breaking wave model is established in which the elevation of breaking waves is expressed in ...

C. C. Tung; N. E. Huang

1987-08-01T23:59:59.000Z

255

Cycloidal Wave Energy Converter  

SciTech Connect

This program allowed further advancing the development of a novel type of wave energy converter, a Cycloidal Wave Energy Converter or CycWEC. A CycWEC consists of one or more hydrofoils rotating around a central shaft, and operates fully submerged beneath the water surface. It operates under feedback control sensing the incoming waves, and converts wave power to shaft power directly without any intermediate power take off system. Previous research consisting of numerical simulations and two dimensional small 1:300 scale wave flume experiments had indicated wave cancellation efficiencies beyond 95%. The present work was centered on construction and testing of a 1:10 scale model and conducting two testing campaigns in a three dimensional wave basin. These experiments allowed for the first time for direct measurement of electrical power generated as well as the interaction of the CycWEC in a three dimensional environment. The Atargis team successfully conducted two testing campaigns at the Texas A&M Offshore Technology Research Center and was able to demonstrate electricity generation. In addition, three dimensional wave diffraction results show the ability to achieve wave focusing, thus increasing the amount of wave power that can be extracted beyond what was expected from earlier two dimensional investigations. Numerical results showed wave cancellation efficiencies for irregular waves to be on par with results for regular waves over a wide range of wave lengths. Using the results from previous simulations and experiments a full scale prototype was designed and its performance in a North Atlantic wave climate of average 30kW/m of wave crest was estimated. A full scale WEC with a blade span of 150m will deliver a design power of 5MW at an estimated levelized cost of energy (LCOE) in the range of 10-17 US cents per kWh. Based on the new results achieved in the 1:10 scale experiments these estimates appear conservative and the likely performance at full scale will exceed this initial performance estimates. In advancing the Technology Readiness Level (TRL) of this type of wave energy converter from 3 to 4, we find the CycWEC to exceed our initial estimates in terms of hydrodynamic performance. Once fully developed and optimized, it has the potential to not just outperform all other WEC technologies, but to also deliver power at a lower LCOE than competing conventional renewables like wind and solar. Given the large wave power resource both domestically and internationally, this technology has the potential to lead to a large improvement in our ability to produce clean electricity at affordable cost.

Stefan G. Siegel, Ph.D.

2012-11-30T23:59:59.000Z

256

RADIATION WAVE DETECTION  

DOE Patents (OSTI)

Radiation waves can be detected by simultaneously measuring radiation- wave intensities at a plurality of space-distributed points and producing therefrom a plot of the wave intensity as a function of time. To this end. a detector system is provided which includes a plurality of nuclear radiation intensity detectors spaced at equal radial increments of distance from a source of nuclear radiation. Means are provided to simultaneously sensitize the detectors at the instant a wave of radiation traverses their positions. the detectors producing electrical pulses indicative of wave intensity. The system further includes means for delaying the pulses from the detectors by amounts proportional to the distance of the detectors from the source to provide an indication of radiation-wave intensity as a function of time.

Wouters, L.F.

1960-08-30T23:59:59.000Z

257

Wave Heights during Hurricane Katrina: An Evaluation of PPP and PPK Measurements of the Vertical Displacement of the GPS Antenna  

Science Conference Proceedings (OSTI)

In August 2005 the eye of Hurricane Katrina passed 49 n mi to the west of a 3-m discus buoy operated by the Central Gulf of Mexico Ocean Observing System (CenGOOS). Buoy motions were measured with a strapped-down 6 degrees of freedom ...

L. C. Bender III; S. D. Howden; D. Dodd; N. L. Guinasso Jr.

2010-10-01T23:59:59.000Z

258

WAVE REFLE TOR  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration. SAND # 2013-8893 P WAVE REFLE TOR

259

Energy Basics: Wave Energy  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Ocean Thermal Energy Conversion Tidal Energy Wave Energy...

260

WAVE REFLE TOR  

electromagnetic wave travels through the rods along their axes it receives a 1/4 period of phase delay be- ... delay, creating positive interference that effectively

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Trimodal steady water waves  

E-Print Network (OSTI)

We construct three-dimensional families of small-amplitude gravity-driven rotational steady water waves on finite depth. The solutions contain counter-currents and multiple crests in each minimal period. Each such wave generically is a combination of three different Fourier modes, giving rise to a rich and complex variety of wave patterns. The bifurcation argument is based on a blow-up technique, taking advantage of three parameters associated with the vorticity distribution, the strength of the background stream, and the period of the wave.

Mats Ehrnström; Erik Wahlén

2013-10-31T23:59:59.000Z

262

RFI Comments - Wave Systems  

Science Conference Proceedings (OSTI)

... These attacks, such as those planted by rootkits ... PwC leveraged the power of TPMs to ... Wave EMBASSY® Remote Administration Server (ERAS) has ...

2013-04-09T23:59:59.000Z

263

Collapse of Alfven waves  

SciTech Connect

The growth rates are calculated for the collapse of Alfven waves in a low-..beta.. plasma. The relationship to rf heating is discussed.(AIP)

Erokhin, N.S.; Moiseev, S.S.; Mukhin, V.V.

1977-07-01T23:59:59.000Z

264

Free-Wave Energy Dissipation in Experimental Breaking Waves  

Science Conference Proceedings (OSTI)

Several transient wave trains containing an isolated plunging or spilling breaker at a prescribed location were generated in a two-dimensional wave flume using an energy focusing technique. Surface elevation measurements of each transient wave ...

Eustorgio Meza; Jun Zhang; Richard J. Seymour

2000-09-01T23:59:59.000Z

265

Resonantly Forced Rossby Waves  

Science Conference Proceedings (OSTI)

A shallow, rotating layer of fluid that supports Rossby waves is subjected to turbulent friction through an Ekman layer at the bottom and is driven by a wave that exerts a shear stress on the upper boundary and for which the phase approximate ...

John Miles

1985-04-01T23:59:59.000Z

266

Wave Mechanics without Probability  

E-Print Network (OSTI)

The behavior of monochromatic electromagnetic waves in stationary media is shown to be ruled by a frequency dependent function, which we call Wave Potential, encoded in the structure of the Helmholtz equation. Contrary to the common belief that the very concept of "ray trajectory" is reserved to the eikonal approximation, a general and exact ray-based Hamiltonian treatment, reducing to the eikonal approximation in the absence of Wave Potential, shows that its presence induces a mutual, perpendicular ray-coupling, which is the one and only cause of any typically wave-like phenomenon, such as diffraction and interference. Recalling, then, that the time-independent Schroedinger and Klein-Gordon equations (associating stationary "matter waves" to mono-energetic particles) are themselves Helmholtz-like equations, the exact, ray-based treatment developed for classical electromagnetic waves is extended - without resorting to statistical concepts - to the exact, trajectory-based Hamiltonian dynamics of mono-energetic point-like particles, both in the non-relativistic and in the relativistic case. The trajectories turn out to be perpendicularly coupled, once more, by an exact, stationary, energy-dependent Wave Potential, coinciding in the form, but not in the physical meaning, with the statistical, time-varying, energy-independent "Quantum Potential" of Bohm's theory, which views particles, just like the standard Copenhagen interpretation, as traveling wave-packets. These results, together with the connection which is shown to exist between Wave Potential and Uncertainty Principle, suggest a novel, non-probabilistic interpretation of Wave Mechanics.

Adriano Orefice; Raffaele Giovanelli; Domenico Ditto

2013-02-18T23:59:59.000Z

267

Wave Energy | Department of Energy  

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

turn, rotates a turbine. Specially built seagoing vessels can also capture the energy of offshore waves. These floating platforms create electricity by funneling waves through...

268

Wave Energy | Open Energy Information  

Open Energy Info (EERE)

TODO: Add description List of Wave Energy Incentives Retrieved from "http:en.openei.orgwindex.php?titleWaveEnergy&oldid267203" Category: Articles with outstanding TODO tasks...

269

Evaluation of a Wind-Wave System for Ensemble Tropical Cyclone Wave Forecasting. Part II: Waves  

Science Conference Proceedings (OSTI)

A wind-wave forecast system, designed with the intention of generating unbiased ensemble wave forecasts for extreme wind events, is assessed. Wave hindcasts for 12 tropical cyclones (TCs) are forced using a wind analysis produced from a ...

Steven M. Lazarus; Samuel T. Wilson; Michael E. Splitt; Gary A. Zarillo

2013-04-01T23:59:59.000Z

270

wave | OpenEI  

Open Energy Info (EERE)

9 9 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142281559 Varnish cache server wave 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. Source Electric Power Research Institute (EPRI) Date Released December 05th, 2011 (3 years ago) Date Updated Unknown Keywords

271

Forced Trench Waves  

Science Conference Proceedings (OSTI)

A general theory for forced barotropic long trench waves in the presence of linear bottom friction is presented. Two specific forcing mechanisms are considered: (i) transverse fluctuations in a western boundary current as it flows across a trench,...

Lawrence A. Mysak; Andrew J. Willmott

1981-11-01T23:59:59.000Z

272

Traveling-wave photodetector  

DOE Patents (OSTI)

The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on the transmission line. This velocity synchronization provides the traveling-wave photodetector with a large electrical bandwidth and a high quantum efficiency, because of the effective extended volume for optical absorption. The traveling-wave photodetector also provides large power dissipation, because of its large physical size. 4 figures.

Hietala, V.M.; Vawter, G.A.

1993-12-14T23:59:59.000Z

273

Traveling-wave photodetector  

DOE Patents (OSTI)

The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on the transmission line. This velocity synchronization provides the traveling-wave photodetector with a large electrical bandwidth and a high quantum efficiency, because of the effective extended volume for optical absorption. The traveling-wave photodetector also provides large power dissipation, because of its large physical size.

Hietala, V.M.; Vawter, G.A.

1992-12-31T23:59:59.000Z

274

Traveling-wave photodetector  

DOE Patents (OSTI)

The traveling-wave photodetector of the present invention combines an absorptive optical waveguide and an electrical transmission line, in which optical absorption in the waveguide results in a photocurrent at the electrodes of the electrical transmission line. The optical waveguide and electrical transmission line of the electrically distributed traveling-wave photodetector are designed to achieve matched velocities between the light in the optical waveguide and electrical signal generated on the transmission line. This velocity synchronization provides the traveling-wave photodetector with a large electrical bandwidth and a high quantum efficiency, because of the effective extended volume for optical absorption. The traveling-wave photodetector also provides large power dissipation, because of its large physical size.

Hietala, Vincent M. (Placitas, NM); Vawter, Gregory A. (Albuquerque, NM)

1993-01-01T23:59:59.000Z

275

Reserves hike to buoy Bontang LNG  

SciTech Connect

This paper reports that a redetermination of reserves in an Indonesian production sharing contract (PSC) will boost liquefied natural gas sales for an Indonesian joint venture (IJV) of Lasmo plc, Union Texas (South East Asia) Inc., Chinese Petroleum Corp. (CPC), and Japex Rantau Ltd. The Indonesian reserves increase involves the Sanga PSC operated by Virginia Indonesia Co., a 50-50 joint venture of Lasmo and Union Texas. Union Texas holds a 38% interest in the IJV and Lasmo 37.8%, with remaining interests held by CPC and Japex. meantime, in US LNG news: Shell LNG Co. has shelved plans to buy an added interest in the LNG business of Columbia Gas System Inc. Panhandle Eastern Corp. units Trunkline Gas Co., Trunkline LNG Co., and Panhandle Eastern Pipe Line Co. (PEPL) filed settlement agreements with the Federal Energy Regulatory Commission to recover from customers $243 million in costs associated with Panhandle's Trunkline LNG operation at Lake Charles, Louisiana.

Not Available

1992-07-27T23:59:59.000Z

276

Design of a mobile coastal communications buoy  

E-Print Network (OSTI)

In response to a growing interest in networked communications at sea as well as the needs of our vital commercial fishing industry, the Northeast Consortium funded a novel research initiative to establish wireless acoustic ...

Hendry-Brogan, Meghan

2004-01-01T23:59:59.000Z

277

Standing wave compressor  

DOE Green Energy (OSTI)

A compressor for compression-evaporation cooling systems, which requires no moving parts. A gaseous refrigerant inside a chamber is acoustically compressed and conveyed by means of a standing acoustic wave which is set up in the gaseous refrigerant. This standing acoustic wave can be driven either by a transducer, or by direct exposure of the gas to microwave and infrared sources, including solar energy. Input and output ports arranged along the chamber provide for the intake and discharge of the gaseous refrigerant. These ports can be provided with optional valve arrangements, so as to increase the compressor's pressure differential. The performance of the compressor in either of its transducer or electromagnetically driven configurations, can be optimized by a controlling circuit. This controlling circuit holds the wavelength of the standing acoustical wave constant, by changing the driving frequency in response to varying operating conditions.

Lucas, Timothy S. (4614 River Mill Ct., Glen Allen, VA 23060)

1991-01-01T23:59:59.000Z

278

Standing wave compressor  

DOE Patents (OSTI)

A compressor for compression-evaporation cooling systems, which requires no moving parts. A gaseous refrigerant inside a chamber is acoustically compressed and conveyed by means of a standing acoustic wave which is set up in the gaseous refrigerant. This standing acoustic wave can be driven either by a transducer, or by direct exposure of the gas to microwave and infrared sources, including solar energy. Input and output ports arranged along the chamber provide for the intake and discharge of the gaseous refrigerant. These ports can be provided with optional valve arrangements, so as to increase the compressor's pressure differential. The performance of the compressor in either of its transducer or electromagnetically driven configurations, can be optimized by a controlling circuit. This controlling circuit holds the wavelength of the standing acoustical wave constant, by changing the driving frequency in response to varying operating conditions.

Lucas, Timothy S. (4614 River Mill Ct., Glen Allen, VA 23060)

1991-01-01T23:59:59.000Z

279

Piezoelectric wave motor  

DOE Patents (OSTI)

A piezoelectric motor having a stator in which piezoelectric elements are contained in slots formed in the stator transverse to the desired wave motion. When an electric field is imposed on the elements, deformation of the elements imposes a force perpendicular to the sides of the slot, deforming the stator. Appropriate frequency and phase shifting of the electric field will produce a wave in the stator and motion in a rotor. In a preferred aspect, the piezoelectric elements are configured so that deformation of the elements in direction of an imposed electric field, generally referred to as the d.sub.33 direction, is utilized to produce wave motion in the stator. In a further aspect, the elements are compressed into the slots so as to minimize tensile stresses on the elements in use.

Yerganian, Simon Scott (Lee' s Summit, MO)

2001-07-17T23:59:59.000Z

280

Piezoelectric wave motor  

DOE Patents (OSTI)

A piezoelectric motor having a stator in which piezoelectric elements are contained in slots formed in the stator transverse to the desired wave motion. When an electric field is imposed on the elements, deformation of the elements imposes a force perpendicular to the sides of the slot, deforming the stator. Appropriate frequency and phase-shifting of the electric field will produce a wave in the stator and motion in a rotor. In a preferred aspect, the piezoelectric elements are configured so that deformation of the elements in the direction of an imposed electric field, generally referred to as the d.sub.33 direction, is utilized to produce wave motion in the stator. In a further aspect, the elements are compressed into the slots so as to minimize tensile stresses on the elements in use.

Yerganian, Simon Scott (Lee' s Summit, MO)

2003-02-11T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

TIMING OF SHOCK WAVES  

DOE Patents (OSTI)

This patent relates to means for ascertaining the instant of arrival of a shock wave in an exploslve charge and apparatus utilizing this means to coordinate the timing of two operations involving a short lnterval of time. A pair of spaced electrodes are inserted along the line of an explosive train with a voltage applied there-across which is insufficient to cause discharge. When it is desired to initiate operation of a device at the time the explosive shock wave reaches a particular point on the explosive line, the device having an inherent time delay, the electrodes are located ahead of the point such that the ionization of the area between the electrodes caused by the traveling explosive shock wave sends a signal to initiate operation of the device to cause it to operate at the proper time. The operated device may be photographic equipment consisting of an x-ray illuminating tube.

Tuck, J.L.

1955-03-01T23:59:59.000Z

282

Expanding impulsive gravitational waves  

E-Print Network (OSTI)

We explicitly demonstrate that the known solutions for expanding impulsive spherical gravitational waves that have been obtained by a "cut and paste" method may be considered to be impulsive limits of the Robinson-Trautman vacuum type N solutions. We extend these results to all the generically distinct subclasses of these solutions in Minkowski, de Sitter and anti-de Sitter backgrounds. For these we express the solutions in terms of a continuous metric. Finally, we also extend the class of spherical shock gravitational waves to include a non-zero cosmological constant.

J. Podolsky; J. B. Griffiths

1999-07-06T23:59:59.000Z

283

Ultrasonic shear wave couplant  

DOE Patents (OSTI)

Ultrasonically testing of an article at high temperatures is accomplished by the use of a compact layer of a dry ceramic powder as a couplant in a method which involves providing an ultrasonic transducer as a probe capable of transmitting shear waves, coupling the probe to the article through a thin compact layer of a dry ceramic powder, propagating a shear wave from the probe through the ceramic powder and into the article to develop echo signals, and analyzing the echo signals to determine at least one physical characteristic of the article.

Kupperman, David S. (Oak Park, IL); Lanham, Ronald N. (Lockport, IL)

1985-01-01T23:59:59.000Z

284

Ultrasonic shear wave couplant  

DOE Patents (OSTI)

Ultrasonically testing of an article at high temperatures is accomplished by the use of a compact layer of a dry ceramic powder as a couplant in a method which involves providing an ultrasonic transducer as a probe capable of transmitting shear waves, coupling the probe to the article through a thin compact layer of a dry ceramic powder, propagating a shear wave from the probe through the ceramic powder and into the article to develop echo signals, and analyzing the echo signals to determine at least one physical characteristic of the article.

Kupperman, D.S.; Lanham, R.N.

1984-04-11T23:59:59.000Z

285

Wave–Turbulence Interactions in a Breaking Mountain Wave  

Science Conference Proceedings (OSTI)

The mean and turbulent structures in a breaking mountain wave are considered through an ensemble of high-resolution (essentially large-eddy simulation) wave-breaking calculations. Of particular interest are the turbulent heat and momentum fluxes ...

Craig C. Epifanio; Tingting Qian

2008-10-01T23:59:59.000Z

286

Effects of Long Waves on Wind-Generated Waves  

Science Conference Proceedings (OSTI)

A model is developed to explain the observation made in several laboratory experiments that short wind-generated waves are suppressed by a train of long, mechanically generated waves. A sheltering mechanism is responsible for generation of the ...

Gang Chen; Stephen E. Belcher

2000-09-01T23:59:59.000Z

287

Pulsed wave interconnect  

Science Conference Proceedings (OSTI)

Pulsed wave interconnect is proposed for global interconnect applications. Signals are represented by localized wavepackets that propagate along the interconnect lines at the local speed of light to trigger the receivers. Energy consumption is reduced ... Keywords: CMOS, VLSI, high-speed interconnect, nonlinear transmission line, pulse compression, soliton, wafer-scale-integration

Pingshan Wang; Gen Pei; Edwin Chih-Chuan Kan

2004-05-01T23:59:59.000Z

288

Deflagration Wave Profiles  

SciTech Connect

Shock initiation in a plastic-bonded explosives (PBX) is due to hot spots. Current reactive burn models are based, at least heuristically, on the ignition and growth concept. The ignition phase occurs when a small localized region of high temperature (or hot spot) burns on a fast time scale. This is followed by a growth phase in which a reactive front spreads out from the hot spot. Propagating reactive fronts are deflagration waves. A key question is the deflagration speed in a PBX compressed and heated by a shock wave that generated the hot spot. Here, the ODEs for a steady deflagration wave profile in a compressible fluid are derived, along with the needed thermodynamic quantities of realistic equations of state corresponding to the reactants and products of a PBX. The properties of the wave profile equations are analyzed and an algorithm is derived for computing the deflagration speed. As an illustrative example, the algorithm is applied to compute the deflagration speed in shock compressed PBX 9501 as a function of shock pressure. The calculated deflagration speed, even at the CJ pressure, is low compared to the detonation speed. The implication of this are briefly discussed.

Menikoff, Ralph [Los Alamos National Laboratory

2012-04-03T23:59:59.000Z

289

Water Waves and Integrability  

E-Print Network (OSTI)

The Euler's equations describe the motion of inviscid fluid. In the case of shallow water, when a perturbative asymtotic expansion of the Euler's equations is taken (to a certain order of smallness of the scale parameters), relations to certain integrable equations emerge. Some recent results concerning the use of integrable equation in modeling the motion of shallow water waves are reviewed in this contribution.

Rossen I. Ivanov

2007-07-12T23:59:59.000Z

290

Evolution of a Random Directional Wave and Freak Wave Occurrence  

Science Conference Proceedings (OSTI)

The evolution of a random directional wave in deep water was studied in a laboratory wave tank (50 m long, 10 m wide, 5 m deep) utilizing a directional wave generator. A number of experiments were conducted, changing the various spectral ...

Takuji Waseda; Takeshi Kinoshita; Hitoshi Tamura

2009-03-01T23:59:59.000Z

291

Distinguishing Propagating Waves and Standing Modes: An Internal Wave Model  

Science Conference Proceedings (OSTI)

This paper examines high-frequency (0.1-0.5 cph) internal waves, waves previously characterized by the Garrett and Munk spectral fits (GM72, GM75, GM79) as being vertically symmetric propagating waves (or equivalently “smeared” standing modes—...

M. Benno Blumenthal; Melbourne G. Briscoe

1995-06-01T23:59:59.000Z

292

Wave Activity Diagnostics Applied to Baroclinic Wave Life Cycles  

Science Conference Proceedings (OSTI)

Wave activity diagnostics are calculated for four different baroclinic wave life cycles, including the LC1 and LC2 cases studied by Thorncroft, Hoskins, and McIntyre. The wave activity is a measure of the disturbance relative to some zonally ...

Gudrun Magnusdottir; Peter H. Haynes

1996-08-01T23:59:59.000Z

293

Wave Breaking Dissipation in the Wave-Driven Ocean Circulation  

Science Conference Proceedings (OSTI)

If wave breaking modifies the Lagrangian fluid paths by inducing an uncertainty in the orbit itself and this uncertainty on wave motion time scales is observable as additive noise, it is shown that within the context of a wave–current interaction ...

Juan M. Restrepo

2007-07-01T23:59:59.000Z

294

Numerical Dispersion of Gravity Waves  

Science Conference Proceedings (OSTI)

When atmospheric gravity waves are simulated in numerical models, they are not only dispersive for physical but also for numerical reasons. Their wave properties (e.g., damping or propagation speed and direction) can depend on grid spacing as ...

Guido Schroeder; K. Heinke Schlünzen

2009-12-01T23:59:59.000Z

295

Sodium Nightglow and Gravity Waves  

Science Conference Proceedings (OSTI)

Oscillations in intensity of NaD nightglow attributed to mesospheric gravity waves have bean studied. Fractional atmospheric density perturbations have been obtained by means of the linear gravity waves theory of Hines. Values of other parameters ...

A. Molina

1983-10-01T23:59:59.000Z

296

Diffusive Transport by Breaking Waves  

Science Conference Proceedings (OSTI)

A simple conceptual model of the relationship between advective transport by breaking waves and diffusive transport is derived. line model postulates that the displacement of fluid parcels by a breaking wave is analogous to molecular diffusion (...

Kenneth P. Bowman

1995-07-01T23:59:59.000Z

297

Spectral Wave–Turbulence Decomposition  

Science Conference Proceedings (OSTI)

A new method of wave–turbulence decomposition is introduced, for which the only instrument required is one high-frequency pointwise velocity sensor. This is a spectral method that assumes equilibrium turbulence and no wave–turbulence interaction. ...

Jeremy D. Bricker; Stephen G. Monismith

2007-08-01T23:59:59.000Z

298

Kinetic Theory of Plasma Waves  

Science Conference Proceedings (OSTI)

Kinetic Wave Theory / Proceedings of the Tenth Carolus Magnus Summer School on Plasma and Fusion Energy Physics

D. Van Eester; E. Lerche

299

Gravitational waves and fundamental physics  

E-Print Network (OSTI)

I give an overview of the motivations for gravitational-wave research, concentrating on the aspects related to ``fundamental'' physics.

Michele Maggiore

2006-02-15T23:59:59.000Z

300

Gravitational Wave Sources: An Overview  

Science Conference Proceedings (OSTI)

With full?sensitivity operation of the first generation of gravitational wave detectors now just around the corner

Bernard F. Schutz

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Energy Loss by Breaking waves  

Science Conference Proceedings (OSTI)

Observations of the frequency of wind wave breaking in deep water are combined with laboratory estimates of the rate of energy loss a from single breaking wave to infer the net rate of energy transfer to the mixed layer from breaking waves, as a ...

S. A. Thorpe

1993-11-01T23:59:59.000Z

302

Long-Wave Trapping by Oceanic Ridges  

Science Conference Proceedings (OSTI)

Long waves are affected by bottom topography and under certain conditions may be trapped along topographical contours which then act as wave guides transmitting wave energy for great distances with little loss. This study examines waves trapped ...

Richard Paul Shaw; Wayne Neu

1981-10-01T23:59:59.000Z

303

Charge Density Wave Compounds  

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

Fisher Research Group Fisher Research Group Layered Chalcogenides 29 February 2008 Controlling the Wave by Brad Plummer, SLAC Communications Stanford University researchers working in part at SSRL have discovered a novel set of properties pertaining to a compound of materials called tritellurides. These compounds, composed of three atoms of tellurium and a single atom of one of the rare earth elements, demonstrate unique electronic properties that can be controlled by altering the temperature of the material. The tritellurides display phenomena known as charge density waves (CDW). In a normal conductive metal, electrons persist in a "sea" wherein they are evenly distributed and equally available, or conductive. A CDW occurs under certain circumstances and causes the electrons to clump together, lowering their availability, and thereby lowering the compound's conductivity. Tellurium, when crystallized into quasi-two-dimensional planes and combined with rare earth elements, produces a material with CDWs that can be manipulated and controlled.

304

DNA waves and water  

E-Print Network (OSTI)

Some bacterial and viral DNA sequences have been found to induce low frequency electromagnetic waves in high aqueous dilutions. This phenomenon appears to be triggered by the ambient electromagnetic background of very low frequency. We discuss this phenomenon in the framework of quantum field theory. A scheme able to account for the observations is proposed. The reported phenomenon could allow to develop highly sensitive detection systems for chronic bacterial and viral infections.

L. Montagnier; J. Aissa; E. Del Giudice; C. Lavallee; A. Tedeschi; G. Vitiello

2010-12-23T23:59:59.000Z

305

The influence of waves . . .  

E-Print Network (OSTI)

With the growing interest in offshore wind resources, it has become increasingly important to establish and refine models for the interaction between wind and waves in order to obtain accurate models for the sea surface roughness. The simple Charnock relation that has been applied for open sea conditions does not work well in the shallow water near-coastal areas that are important for offshore wind energy. A model for the surface roughness of the sea has been developed based on this concept, using an expression for the Charnock constant as a function of wave age [1], and then relating the wave `age' to the distance to the nearest upwind coastline. The data used in developing these models originated partly from analysis of data from the Vindeby site, partly from previously published results. The scatter in the data material was considerable and consequently there is a need to test these models further by analysing data from sites exhibiting varying distances to the coast. Results from such analysis of recent data are presented for sites with distances to the coast varying from 10km to several hundreds of km. The model shows a good agreement also with this data.

Bernhard Lange; Jřrgen Hřjstrup

1999-01-01T23:59:59.000Z

306

WAVE DELAYING STRUCTURE FOR RECTANGULAR WAVE-GUIDES  

DOE Patents (OSTI)

This patent relates to wave-guides and in particular describes wave delaying structure located within a wave-guide. The disclosed wave-guide has an elongated fiat metal sheet arranged in a central plane of the guide and formed with a series of transverse inductive slots such that each face presents an inductive impedance to the guide. The sheet is thickened in the area between slots to increase the self capacity of the slots. Experimental results indicate that in a wave-guide loaded in accordance with the invention the guided wavelength changes more slowly as the air wavelength is changed than the guided wavelength does in wave-guides loaded by means of corrugations.

Robertson-Shersby-Harvie, R.B.; Dain, J.

1956-11-13T23:59:59.000Z

307

Gravimagnetic shock waves and gravitational-wave experiments  

E-Print Network (OSTI)

Causes of the unsatisfactory condition of the gravitational-wave experiments are discussed and a new outlook at the detection of gravitational waves of astrophysical origin is proposed. It is shown that there are strong grounds for identifying the so-called giant pulses in the pulsar NP 0532 radiation with gravimagnetic shock waves (GMSW) excited in the neutron star magnetosphere by sporadic gravitational radiation of this pulsar.

Yu. G. Ignatyev

2011-01-09T23:59:59.000Z

308

Riding the Waves: Harnessing Ocean Wave Energy through ...  

Science Conference Proceedings (OSTI)

... The opportunities for ocean wave power to become a new, reliable and clean source of renewable energy will be discussed, as well as activities of ...

2012-04-04T23:59:59.000Z

309

Iterated multidimensional wave conversion  

Science Conference Proceedings (OSTI)

Mode conversion can occur repeatedly in a two-dimensional cavity (e.g., the poloidal cross section of an axisymmetric tokamak). We report on two novel concepts that allow for a complete and global visualization of the ray evolution under iterated conversions. First, iterated conversion is discussed in terms of ray-induced maps from the two-dimensional conversion surface to itself (which can be visualized in terms of three-dimensional rooms). Second, the two-dimensional conversion surface is shown to possess a symplectic structure derived from Dirac constraints associated with the two dispersion surfaces of the interacting waves.

Brizard, A. J. [Dept. Physics, Saint Michael's College, Colchester, VT 05439 (United States); Tracy, E. R.; Johnston, D. [Dept. Physics, College of William and Mary, Williamsburg, VA 23187-8795 (United States); Kaufman, A. N. [LBNL and Physics Dept., UC Berkeley, Berkeley, CA 94720 (United States); Richardson, A. S. [T-5, LANL, Los Alamos, NM 87545 (United States); Zobin, N. [Dept. Mathematics, College of William and Mary, Williamsburg, VA 23187-8795 (United States)

2011-12-23T23:59:59.000Z

310

Gravity Waves in the Sun  

E-Print Network (OSTI)

We present numerical simulations of penetrative convection and gravity wave excitation in the Sun. Gravity waves are self-consistently generated by a convective zone overlying a radiative interior. We produce power spectra for gravity waves in the radiative region as well as estimates for the energy flux of gravity waves below the convection zone. We calculate a peak energy flux in waves below the convection zone to be three orders of magnitude smaller than previous estimates for m=1. The simulations show that the linear dispersion relation is a good approximation only deep below the convective-radiative boundary. Both low frequency propagating gravity waves as well as higher frequency standing modes are generated; although we find that convection does not continually drive the standing g-mode frequencies.

Tamara M. Rogers; Gary A. Glatzmaier

2005-08-25T23:59:59.000Z

311

Shock waves in thermal lensing  

E-Print Network (OSTI)

We review experimental investigation on spatial shock waves formed by the self-defocusing action of a laser beam propagation in a disordered thermal nonlinear media.

Gentilini, S; DeRe, E; Conti, C

2013-01-01T23:59:59.000Z

312

Wave-coherent airflow and critical layers over ocean waves  

Science Conference Proceedings (OSTI)

An analysis of coherent measurements of winds and waves from data collected during the ONR HiRes program from R/P FLIP off the coast of northern California in June 2010 is presented. A suite of wind and wave measuring systems was deployed to ...

Laurent Grare; Luc Lenain; W. Kendall Melville

313

Wave runup on cylinders subject to deep water random waves  

E-Print Network (OSTI)

The accurate prediction of wave runup on deepwater offshore platform columns is of great importance for design engineers. Although linear predictive models are commonly used in the design and analysis process, many of the important effects are of higher order, and thus can only be accounted for by complex nonlinear models that better reflect the physics of the problem. This study presents a two-parameter Weibull distribution function that utilizes empirical coefficients to model the surface wave runup. Laboratory measurements of irregular waves interfering with vertical platform cylinders were used to obtain the Weibull coefficients necessary for the analytical model. Six data sets with different configurations where the wave elevation was measured close to the test cylinders are analyzed. These data on wave runup in deepwater random waves were generated at similar water depths with significant wave heights and spectral peak periods. Statistical parameters, zero crossing analysis and spectral analysis were utilized to characterize and interpret the time series data. The analysis focused on interpreting the tails of the probability distributions by carefully fitting the analytical model to the measured model data. The main conclusion of this study is that the two-parameter Weibull model can be used to accurately model the wave runup on platform cylinders for the experimental data investigated in this study.

Indrebo, Ann Kristin

2001-01-01T23:59:59.000Z

314

Wave Mechanics and the Fifth Dimension  

E-Print Network (OSTI)

Replacing 4D Minkowski space by 5D canonical space leads to a clearer derivation of the main features of wave mechanics, including the wave function and the velocity of de Broglie waves. Recent tests of wave-particle duality could be adapted to investigate whether de Broglie waves are basically 4D or 5D in nature.

Paul S. Wesson; James M. Overduin

2013-01-28T23:59:59.000Z

315

Selective Excitation of Tropical Atmospheric Waves in Wave-CISK: The Effect of Vertical Wind Shear  

Science Conference Proceedings (OSTI)

The growth of waves and the generation of potential energy in wave-CISK require unstable waves to tilt with height oppositely to their direction of propagation. This makes the structures and instability properties of these waves very sensitive to ...

Minghua Zhang; Marvin A. Geller

1994-02-01T23:59:59.000Z

316

Einstein, Black Holes Gravitational Waves  

E-Print Network (OSTI)

1 #12;Einstein, Black Holes and Gravitational Waves Gregory B. Cook Wake Forest University 2 #12 Relativity? · What are some of the consequences of GR? · What are Black Holes like and do they exist? · What? · What are Black Holes like and do they exist? · What can we learn from Gravity Waves? · To do all

Cook, Greg

317

Mixing in Symmetric Holmboe Waves  

Science Conference Proceedings (OSTI)

Direct simulations are used to study turbulence and mixing in Holmboe waves. Previous results showing that mixing in Holmboe waves is comparable to that found in the better-known Kelvin–Helmholtz (KH) billows are extended to cover a range of ...

W. D. Smyth; J. R. Carpenter; G. A. Lawrence

2007-06-01T23:59:59.000Z

318

Ocean Tidal and Wave Energy  

Science Conference Proceedings (OSTI)

First published in 2000, the annual Renewable Energy Technical Assessment Guide (TAG-RE) provides a consistent basis for evaluating the economic feasibility of renewable generation technologies. This excerpt from the 2005 TAG-RE addresses ocean tidal and wave energy conversion technologies, which offer promise for converting the significant energy potential available in ocean tidal currents and waves to electricity in the future.

2005-12-19T23:59:59.000Z

319

Momentum Transport by Gravity Waves  

Science Conference Proceedings (OSTI)

The momentum flux by orographic gravity waves and the turbulent heat flux in wave-breaking regions are estimated from aircraft data from ALPEX. The fluxes on 6 March 1982 are controlled by low-level directional shear of the mean flow and ...

Jinwon Kim; L. Mahrt

1992-05-01T23:59:59.000Z

320

Evolution of Persistent Wave Groups  

Science Conference Proceedings (OSTI)

During the near-field leg of the Hawaiian Ocean-Mixing Experiment (HOME-NF), short, steep surface wave groups were observed that elicited strong group-forced responses in the wave-filtered surface current field, as reported by Smith. Some of ...

Jerome A. Smith; Coralie Brulefert

2010-01-01T23:59:59.000Z

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


321

Gas Explosion Characterization, Wave Propagation  

E-Print Network (OSTI)

of nuclear power plants. However, an evi- dent lack of knowledge in the field had demanded for a detaileds & Dt^boooo^j Risø-R-525 Gas Explosion Characterization, Wave Propagation (Small-Scale Experiments EXPLOSION CHARACTERIZATION, WAVE PROPAGATION (Small-Scale Experiments) G.C. Larsen Abstract. A number

322

Gravitational Waves II: Emitting Systems  

E-Print Network (OSTI)

We use the basic equations that predict the emission of gravitational waves according to the Einstein gravitation theory to calculate the luminosities and the amplitudes of the waves generated by binary stars, pulsations of neutron stars, wobbling of deformed neutron stars, oscillating quadrupoles, rotating bars and collapsing and bouncing cores of supernovas. This paper was written to graduate and postgraduate students of Physics.

M. Cattani

2010-03-10T23:59:59.000Z

323

Tube-wave seismic imaging  

DOE Patents (OSTI)

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Korneev, Valeri A [LaFayette, CA

2009-05-05T23:59:59.000Z

324

Tube-wave seismic imaging  

DOE Patents (OSTI)

The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tube-wave (150) is initiated in a source well (110) by a source (111), travels in the source well (110), is coupled to a geological feature (140), propagates (151) through the geological feature (140), is coupled back to a tube-wave (152) at a receiver well (120), and is and received by receiver(s) (121) in either the same (110) or a different receiving well (120). The tube-wave has been shown to be extremely sensitive to changes in reservoir characteristics. Tube-waves appear to couple most effectively to reservoirs where the well casing is perforated, allowing direct fluid contact from the interior of a well case to the reservoir.

Korneev, Valeri A. (Lafayette, CA); Bakulin, Andrey (Houston, TX)

2009-10-13T23:59:59.000Z

325

Hinsdale Wave Basin 1 | Open Energy Information  

Open Energy Info (EERE)

Hinsdale Wave Basin 1 Hinsdale Wave Basin 1 Jump to: navigation, search Basic Specifications Facility Name Hinsdale Wave Basin 1 Overseeing Organization Oregon State University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 104.0 Beam(m) 3.7 Depth(m) 4.6 Cost(per day) $3500 Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 1.8 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Monochromatic waves (cnoidal, Stokes, Airy), solitary waves, user-defined free surface timeseries or board displacement timeseries for random waves Wave Direction Uni-Directional Simulated Beach Yes Description of Beach 12' by 12' concrete slabs anchored to flume walls

326

Second Harmonic Resonance for Equatorial Waves  

Science Conference Proceedings (OSTI)

Simple, exact analytical conditions for second harmonic resonance between equatorial waves are derived. Such resonance can occur only between two Rossby waves or two westward travelling gravity waves. It is shown that regardless of whether the ...

John P. Boyd

1983-03-01T23:59:59.000Z

327

On the Diurnal Variation of Mountain Waves  

Science Conference Proceedings (OSTI)

The diurnal variation of mountain waves and wave drag associated with flow past mesoscale ridges has been examined using the Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS) and an analytical boundary layer (BL) model. The wave drag ...

Qingfang Jiang; James D. Doyle

2008-04-01T23:59:59.000Z

328

Effect of Nonlinearity on Atmospheric Gravity Waves  

Science Conference Proceedings (OSTI)

The weakly nonlinear limit of two-dimensional gravity waves in an incompressible, inviscid and stably stratified atmosphere is studied. The three-wave resonant interaction theory indicates an energy cascade from a vertically propagating wave (...

Mostafa M. Ibrahim

1987-02-01T23:59:59.000Z

329

Wind Wave Growth at Short Fetch  

Science Conference Proceedings (OSTI)

Wave wire data from the large wind wave tank of the Ocean Engineering Laboratory at the University of California, Santa Barbara, are analyzed, and comparisons are made with published data collected in four other wave tanks. The behavior of wind ...

T. Lamont-Smith; T. Waseda

2008-07-01T23:59:59.000Z

330

Nonlinear Wave Statistics in a Focal Zone  

Science Conference Proceedings (OSTI)

In this paper, the combined effects of refraction and nonlinearity on the evolution of ocean surface wave statistics are considered and possible implications for the likelihood of extreme waves, also known as freak or rogue waves, are examined. A ...

T. T. Janssen; T. H. C. Herbers

2009-08-01T23:59:59.000Z

331

Observations of Breaking Surface Wave Statistics  

Science Conference Proceedings (OSTI)

Breaking surface waves were observed during the Surface Wave Process Program with a novel acoustical instrument that makes use of underwater ambient sound to track individual breaking events. The spatial and temporal statistics of braking waves ...

Li Ding; David M. Farmer

1994-06-01T23:59:59.000Z

332

Topographic Waves Generated by a Transient Wind  

Science Conference Proceedings (OSTI)

The concept of linear mountain waves is generally equated with steady-state stationary waves. This essentially means that the absolute horizontal phase velocity of mountain waves is zero and that their momentum flux profile is independent of ...

François Lott; Hector Teitelbaum

1993-08-01T23:59:59.000Z

333

Interpreting Stationary Wave Nonlinearity in Barotropic Dynamics  

Science Conference Proceedings (OSTI)

Stationary wave nonlinearity describes the self-interaction of stationary waves and is important in maintaining the zonally asymmetric atmospheric general circulation. However, the dynamics of stationary wave nonlinearity, which is often ...

Lei Wang; Paul J. Kushner

2010-07-01T23:59:59.000Z

334

MITIGATED FINDING OF NO SIGNIFICANT IMPACT OREGON STATE UNIVERSITY...  

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

The TRIAXYS(tm) wave measurement buoy will weigh approximately 440 pounds (220 kilograms), including batteries. It will measure approximately 3 feet (0.9 meter) in diameter...

335

Wave Wind LLC | Open Energy Information  

Open Energy Info (EERE)

Wave Wind LLC Place Sun Prairie, Wisconsin Zip 53590 Sector Services, Wind energy Product Wisconsin-based wind developer and construction services provider. References Wave Wind...

336

Equatorial Wave-Mean Flow Interaction: The Long Rossby Waves  

Science Conference Proceedings (OSTI)

The interaction of long equatorial Rossby waves with mean zonal currents in the ocean is investigated in a continuously stratified finite difference numerical model. The model allows for realistic specification of the mean state including both ...

Jeffrey A. Proehl

1990-02-01T23:59:59.000Z

337

Nonintrusive Measurement of Ocean Waves: Lidar Wave Gauge  

Science Conference Proceedings (OSTI)

In December 1999, a nonintrusive directional lidar wave gauge (LWG) was field tested at the Field Research Facility (FRF) in North Carolina. The LWG uses proven lidar technology to directly measure water surface elevation from above the water’s ...

Jennifer L. Irish; Jennifer M. Wozencraft; A. Grant Cunningham; Claudine Giroud

2006-11-01T23:59:59.000Z

338

Wave Attenuation and Wave Drift in the Marginal Ice Zone  

Science Conference Proceedings (OSTI)

Surface gravity waves in a viscous rotating ocean are studied theoretically when they penetrate an area covered by highly concentrated brashlike ice. The motion is described by a Lagrangian formulation, and the brash is modeled by a viscous ...

Jan Erik Weber

1987-12-01T23:59:59.000Z

339

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

340

Hinsdale Wave Basin 2 | Open Energy Information  

Open Energy Info (EERE)

Wave Basin 2 Wave Basin 2 Jump to: navigation, search Basic Specifications Facility Name Hinsdale Wave Basin 2 Overseeing Organization Oregon State University Hydrodynamics Length(m) 48.8 Beam(m) 26.5 Depth(m) 2.1 Water Type Freshwater Cost(per day) $3500 Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.8 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Monochromatic waves (cnoidal, Stokes, Airy), solitary waves, user-defined free surface timeseries or board displacement timeseries for random waves Wave Direction Both Simulated Beach Yes Description of Beach Built to client specifications, currently rigid concrete over gravel fill

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Sheets Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Sheets Wave Basin Sheets Wave Basin Jump to: navigation, search Basic Specifications Facility Name Sheets Wave Basin Overseeing Organization University of Rhode Island Hydrodynamic Testing Facility Type Wave Basin Length(m) 30.0 Beam(m) 3.6 Depth(m) 1.8 Cost(per day) $750(+ Labor/Materials) Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2.0 Length of Effective Tow(m) 25.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 10 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Pre-programmed for regular and irregular waves, but wavemaker is capable of any input motion. Wave Direction Uni-Directional

342

Haynes Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Wave Basin Wave Basin Jump to: navigation, search Basic Specifications Facility Name Haynes Wave Basin Overseeing Organization Texas A&M (Haynes) Hydrodynamic Testing Facility Type Wave Basin Length(m) 38.1 Beam(m) 22.9 Depth(m) 1.5 Water Type Freshwater Cost(per day) $150/hour (excluding labor) Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Maximum Wave Height(m) at Wave Period(s) 3.3 Maximum Wave Length(m) 10.7 Wave Period Range(s) 3.3 Current Velocity Range(m/s) 0.2 Programmable Wavemaking Yes Wavemaking Description Directional, irregular, any spectrum, cnoidal or solitary wave Wave Direction Both Simulated Beach Yes Description of Beach Stone Channel/Tunnel/Flume Channel/Tunnel/Flume None

343

The parametric decay of Alfven waves into shear Alfven waves and dust lower hybrid waves  

SciTech Connect

The parametric decay instability of Alfven wave into low-frequency electrostatic dust-lower-hybrid and electromagnetic shear Alfven waves has been investigated in detail in a dusty plasma in the presence of external/ambient uniform magnetic field. Magnetohydrodynamic fluid equations of plasmas have been employed to find the linear and nonlinear response of the plasma particles for this three-wave nonlinear coupling in a dusty magnetoplasma. Here, relatively high frequency electromagnetic Alfven wave has been taken as the pump wave. It couples with other two low-frequency internal possible modes of the dusty magnetoplasma, viz., the dust-lower-hybrid and shear Alfven waves. The nonlinear dispersion relation of the dust-lower-hybrid wave has been solved to obtain the growth rate of the parametric decay instability. The growth rate is maximum for small value of external magnetic field B{sub s}. It is noticed that the growth rate is proportional to the unperturbed electron number density n{sub oe}.

Jamil, M. [Department of Physics, Government College University, Lahore 54000 (Pakistan); Department of Physics, Crescent Model School Shadman, Lahore 54000 (Pakistan); Shah, H. A.; Zubia, K.; Zeba, I.; Uzma, Ch. [Department of Physics, Government College University, Lahore 54000 (Pakistan); Salimullah, M. [Department of Physics, Government College University, Lahore 54000 (Pakistan); Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh)

2010-07-15T23:59:59.000Z

344

Waves in the chromosphere: observations  

E-Print Network (OSTI)

I review the literature on observational aspects of waves in the solar chromosphere in the first part of this contribution. High-frequency waves are invoked to build elaborate cool-star chromosphere heating theories but have not been detected decisively so far, neither as magnetic modes in network elements nor as acoustic modes in below-the-canopy internetwork regions. Three-minute upward-propagating acoustic shocks are thoroughly established through numerical simulation as the cause of intermittent bright internetwork grains, but their pistoning and their role in the low-chromosphere energy budget remain in debate. Three-minute wave interaction with magnetic canopies is a newer interest, presently progressing through numerical simulation. Three-minute umbral flashes and running penumbral waves seem a similar acoustic-shock phenomenon awaiting numerical simulation. The low-frequency network Doppler modulation remains enigmatic. In the second part, I address low-frequency ultraviolet brightness variations of t...

Rutten, R J

2010-01-01T23:59:59.000Z

345

wave energy | OpenEI  

Open Energy Info (EERE)

99 99 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142281099 Varnish cache server wave energy Dataset Summary Description Source The Wave Energy Resource Assessment project is a joint venture between NREL, EPRI, and Virginia Tech. EPRI is the prime contractor, Virginia Tech is responsible for development of the models and estimating the wave resource, and NREL serves as an independent validator and also develops the final GIS-based display of the data. Source National Renewable Energy Laboratory (NREL) Date Released September 27th, 2011 (3 years ago) Date Updated October 20th, 2011 (3 years ago) Keywords EPRI GIS NREL Puerto Rico shapefile United States Virginia Tech wave energy

346

Gravitational waves with distinct wavefronts  

E-Print Network (OSTI)

Exact solutions of Einstein's vacuum equations are considered which describe gravitational waves with distinct wavefronts. A family of such solutions presented recently in which the wavefronts have various geometries and which propagate into a number of physically significant backgrounds is here related to an integral representation which is a generalisation of the Rosen pulse solution for cylindrical waves. A nondiagonal solution is also constructed which is a generalisation of the Rosen pulse, being a cylindrical pulse wave with two states of polarization propagating into a Minkowski background. The solution is given in a complete and explicit form. A further generalisation to include electromagnetic waves with a distinct wavefront of the same type is also discussed.

G A Alekseev; J B Griffiths

1997-07-22T23:59:59.000Z

347

Orographically Induced Rossby Wave Instabilities  

Science Conference Proceedings (OSTI)

Recently, the effects of nonlinearity on waves forced by sinusoidal orography in severely truncated barotropic and baroclinic models have been explored. Multiple equilibria were found for fixed forcing and these have been associated with zonal ...

Michael J. Revell; Brian J. Hoskins

1984-01-01T23:59:59.000Z

348

Thermal Equilibration of Planetary Waves  

Science Conference Proceedings (OSTI)

Equilibration of planetary waves toward free-mode forms, steady solutions of the unforced, undamped equations of motion, is studied in a three-level quasi-geostrophic model on the hemisphere. A thermal mechanism is invoked, parameterized as a ...

John Marshall; Damon W. K. So

1990-04-01T23:59:59.000Z

349

A Planetary-Wave Climatology  

Science Conference Proceedings (OSTI)

Ultralong and long planetary waves are analyzed at the 500 mb level in terms of their amplitudes, phases and stationarity characteristics, the latter described in terms of a stationarity index SIn. This index consists of the ratio between ...

Elmar R. Reiter; Daniel Westhoff

1981-04-01T23:59:59.000Z

350

On Offshore Propagating Diurnal Waves  

Science Conference Proceedings (OSTI)

Characteristics and dynamics of offshore diurnal waves induced by land–sea differential heating are examined using linear theory. Two types of heating profiles are investigated, namely a shallow heating source confined within an atmospheric ...

Qingfang Jiang

2012-05-01T23:59:59.000Z

351

Explosive Instability of Vorticity Waves  

Science Conference Proceedings (OSTI)

The weakly nonlinear dynamics of “vorticity waves” (VW), specific wavelike motions occurring nearshore in the presence of an alongshore shear current is examined. By means of a standard asymptotic technique starting with the shallow-water ...

V. I. Shrira; V. V. Voronovich; N. G. Kozhelupova

1997-04-01T23:59:59.000Z

352

Three-Dimensional Edge Waves  

Science Conference Proceedings (OSTI)

Exact solutions are found to the linearized three-dimensional equations for free surface-gravity waves trapped against a straight coastline with a topography varying perpendicular to the coastline. Three families of topographies are found, one ...

Richard Paul Shaw; David Paskausky

1981-04-01T23:59:59.000Z

353

Scattering of superpositions of localized waves from spheres  

Science Conference Proceedings (OSTI)

Localized wave (LW) solutions of the homogeneous wave equation can represent either focused or extended pulses

Des Power; Rod Donnelly

1993-01-01T23:59:59.000Z

354

Planetary waves in rotating ionosphere  

Science Conference Proceedings (OSTI)

The problem of propagation of ultralong planetary waves in the Earth's upper atmosphere is considered. A new exact solution to the MHD equations for the ionosphere is obtained in spherical coordinates with allowance for the geomagnetic field and Earth's rotation. A general dispersion relation is derived for planetary waves in the ionospheric E and F regions, and the characteristic features of their propagation in a weakly ionized ionospheric plasma are discussed.

Khantadze, A. G.; Jandieri, V. G. [Tbilisi State University (Georgia); Jandieri, G. V. [Georgian Technical University (Georgia)

2008-06-15T23:59:59.000Z

355

Spinor wave equation of photon  

E-Print Network (OSTI)

In this paper, we give the spinor wave equations of free and unfree photon, which are the differential equation of space-time one order. For the free photon, the spinor wave equations are covariant, and the spinors $\\psi$ are corresponding to the the reducibility representations $D^{10}+D^{01}$ and $D^{10}+D^{01}+D^{1/2 1/2}$ of the proper Lorentz group.

Xiang-Yao Wu; Bo-Jun Zhang; Xiao-Jing Liu; Si-Qi Zhang; Jing Wang; Hong Li; Xi-Hui Fan; Jing-Wu Li

2012-12-14T23:59:59.000Z

356

Multibaseline gravitational wave radiometry  

E-Print Network (OSTI)

We present a statistic for the detection of stochastic gravitational wave backgrounds (SGWBs) using radiometry with a network of multiple baselines. We also quantitatively compare the sensitivities of existing baselines and their network to SGWBs. We assess how the measurement accuracy of signal parameters, e.g., the sky position of a localized source, can improve when using a network of baselines, as compared to any of the single participating baselines. The search statistic itself is derived from the likelihood ratio of the cross correlation of the data across all possible baselines in a detector network and is optimal in Gaussian noise. Specifically, it is the likelihood ratio maximized over the strength of the SGWB, and is called the maximized-likelihood ratio (MLR). One of the main advantages of using the MLR over past search strategies for inferring the presence or absence of a signal is that the former does not require the deconvolution of the cross correlation statistic. Therefore, it does not suffer from errors inherent to the deconvolution procedure and is especially useful for detecting weak sources. In the limit of a single baseline, it reduces to the detection statistic studied by Ballmer [Class. Quant. Grav. 23, S179 (2006)] and Mitra et al. [Phys. Rev. D 77, 042002 (2008)]. Unlike past studies, here the MLR statistic enables us to compare quantitatively the performances of a variety of baselines searching for a SGWB signal in (simulated) data. Although we use simulated noise and SGWB signals for making these comparisons, our method can be straightforwardly applied on real data.

Dipongkar Talukder; Sanjit Mitra; Sukanta Bose

2010-12-21T23:59:59.000Z

357

SURFACE ALFVEN WAVES IN SOLAR FLUX TUBES  

SciTech Connect

Magnetohydrodynamic (MHD) waves are ubiquitous in the solar atmosphere. Alfven waves and magneto-sonic waves are particular classes of MHD waves. These wave modes are clearly different and have pure properties in uniform plasmas of infinite extent only. Due to plasma non-uniformity, MHD waves have mixed properties and cannot be classified as pure Alfven or magneto-sonic waves. However, vorticity is a quantity unequivocally related to Alfven waves as compression is for magneto-sonic waves. Here, we investigate MHD waves superimposed on a one-dimensional non-uniform straight cylinder with constant magnetic field. For a piecewise constant density profile, we find that the fundamental radial modes of the non-axisymmetric waves have the same properties as surface Alfven waves at a true discontinuity in density. Contrary to the classic Alfven waves in a uniform plasma of infinite extent, vorticity is zero everywhere except at the cylinder boundary. If the discontinuity in density is replaced with a continuous variation of density, vorticity is spread out over the whole interval with non-uniform density. The fundamental radial modes of the non-axisymmetric waves do not need compression to exist unlike the radial overtones. In thin magnetic cylinders, the fundamental radial modes of the non-axisymmetric waves with phase velocities between the internal and the external Alfven velocities can be considered as surface Alfven waves. On the contrary, the radial overtones can be related to fast-like magneto-sonic modes.

Goossens, M.; Andries, J.; Soler, R.; Van Doorsselaere, T. [Centre for Plasma Astrophysics, Department of Mathematics, Katholieke Universiteit Leuven, Celestijnenlaan 200B, 3001 Leuven (Belgium); Arregui, I.; Terradas, J., E-mail: marcel.goossens@wis.kuleuven.be [Solar Physics Group, Departament de Fisica, Universitat de les Illes Balears, E-07122 Palma de Mallorca (Spain)

2012-07-10T23:59:59.000Z

358

Steady water waves with multiple critical layers  

E-Print Network (OSTI)

We construct small-amplitude periodic water waves with multiple critical layers. In addition to waves with arbitrarily many critical layers and a single crest in each period, two-dimensional sets of waves with several crests and troughs in each period are found. The setting is that of steady two-dimensional finite-depth gravity water waves with vorticity.

Mats Ehrnström; Joachim Escher; Erik Wahlén

2010-04-29T23:59:59.000Z

359

Shock waves in trombones A. Hirschberg  

E-Print Network (OSTI)

Shock waves in trombones A. Hirschberg Eindhoven University of Technology, W&S, P.O. Box 513, 5600 of the wave propagation in the pipe. At fortissimo levels this leads to shock wave formation observed in our and the band- width necessary in order to observe shock waves. Our ex- perimental results, shown in Figs. 2

Luo, Xiaoyu

360

UNDERCOMPRESSIVE SHOCK WAVES AND THE DAFERMOS REGULARIZATION  

E-Print Network (OSTI)

UNDERCOMPRESSIVE SHOCK WAVES AND THE DAFERMOS REGULARIZATION STEPHEN SCHECTER Abstract solutions that include only shock waves. Shock waves are required to satisfy the viscous profile criterion for a given viscosity (B(u)u x ) x . Undercompressive shock waves are allowed. We also show that all

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Alden Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Wave Basin Wave Basin Jump to: navigation, search Basic Specifications Facility Name Alden Wave Basin Overseeing Organization Alden Research Laboratory, Inc Hydrodynamic Testing Facility Type Wave Basin Length(m) 33.5 Beam(m) 21.3 Depth(m) 1.2 Water Type Freshwater Cost(per day) Depends on study Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 1.0 Maximum Wave Length(m) 1.8 Wave Period Range(s) 1.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Period adjustable electronically, height adjustable mechanically Wave Direction Both Simulated Beach Yes Description of Beach Designed as needed using commercially available sand/sediment

362

Extracorporeal Shock Wave Lithotripsy Shock wave lithotripsy (SWL) was introduced in  

E-Print Network (OSTI)

Part IV Extracorporeal Shock Wave Lithotripsy #12;#12;Shock wave lithotripsy (SWL) was introduced in the fundamentals of shock wave generation and delivery. That is, lithotriptors have changed in form and mode, an acoustic shock wave. This pressure pulse, or shock wave, is responsible for breaking stones. However

Cleveland, Robin

363

Wave propagation through soils in centrifuge testing  

E-Print Network (OSTI)

Wave propagation phenomena in soils can be experimentally simulated using centrifuge scale models. An original excitation device (drop-ball arrangement) is proposed to generate short wave trains. Wave reflections on model boundaries are taken into account and removed by homomorphic filtering. Propagation is investigated through dispersion laws. For drop-ball experiments, spherical wave field analysis assuming linear viscoelasticity leads to a complete analytical description of wave propagation. Damping phenomena are examined and evaluated using this description.

Semblat, J F; 10.1142/S1363246998000071

2009-01-01T23:59:59.000Z

364

Ion Bernstein wave heating research  

SciTech Connect

Ion Bernstein wave heating (IBWH) utilizes the ion Bernstein wave (IBW), a hot plasma wave, to carry the radio frequency (rf) power to heat tokamak reactor core. Earlier wave accessibility studies have shown that this finite-Larmor-radius (FLR) mode should penetrate into a hot dense reactor plasma core without significant attenuation. Moreover, the IBW`s low phase velocity ({omega}/k{sub {perpendicular}} {approx} V{sub Ti} {much_lt} V{sub {alpha}}) greatly reduces the otherwise serious wave absorption by the 3.5 MeV fusion {alpha}-particles. In addition, the property of IBW`s that k{sub {perpendicular}} {rho}{sub i} {approx} 1 makes localized bulk ion heating possible at the ion cyclotron harmonic layers. Such bulk ion heating can prove useful in optimizing fusion reactivity. In another vein, with proper selection of parameters, IBW`s can be made subject to strong localized electron Landau damping near the major ion cyclotron harmonic resonance layers. This property can be useful, for example, for rf current drive in the reactor plasma core. This paper discusses this research.

Ono, Masayuki

1992-03-01T23:59:59.000Z

365

Ion Bernstein wave heating research  

Science Conference Proceedings (OSTI)

Ion Bernstein wave heating (IBWH) utilizes the ion Bernstein wave (IBW), a hot plasma wave, to carry the radio frequency (rf) power to heat tokamak reactor core. Earlier wave accessibility studies have shown that this finite-Larmor-radius (FLR) mode should penetrate into a hot dense reactor plasma core without significant attenuation. Moreover, the IBW's low phase velocity ({omega}/k{sub {perpendicular}} {approx} V{sub Ti} {much lt} V{sub {alpha}}) greatly reduces the otherwise serious wave absorption by the 3.5 MeV fusion {alpha}-particles. In addition, the property of IBW's that k{sub {perpendicular}} {rho}{sub i} {approx} 1 makes localized bulk ion heating possible at the ion cyclotron harmonic layers. Such bulk ion heating can prove useful in optimizing fusion reactivity. In another vein, with proper selection of parameters, IBW's can be made subject to strong localized electron Landau damping near the major ion cyclotron harmonic resonance layers. This property can be useful, for example, for rf current drive in the reactor plasma core. This paper discusses this research.

Ono, Masayuki.

1992-03-01T23:59:59.000Z

366

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

367

Internal Wave–Wave Interactions. Part II: Spectral Energy Transfer and Turbulence Production  

Science Conference Proceedings (OSTI)

The spectral transfer of internal wave energy toward high vertical wavenumber kz and turbulence production ? is examined by ray tracing small-scale test waves in a canonical Garrett and Munk background wave field. Unlike previous ray-tracing ...

Haili Sun; Eric Kunze

1999-11-01T23:59:59.000Z

368

Influence of Wave Propagation on the Doppler Spreading of Atmospheric Gravity Waves  

Science Conference Proceedings (OSTI)

The “Doppler spread” theory of atmospheric gravity waves has developed rapidly in recent years, from an initial theory of wave spectra into a general parameterization of gravity wave effects for use in global models of the middle atmosphere. Yet ...

Stephen D. Eckermann

1997-11-01T23:59:59.000Z

369

Implicit–Explicit Multistep Methods for Fast-Wave–Slow-Wave Problems  

Science Conference Proceedings (OSTI)

Implicit–explicit (IMEX) linear multistep methods are examined with respect to their suitability for the integration of fast-wave–slow-wave problems in which the fast wave has relatively low amplitude and need not be accurately simulated. The ...

Dale R. Durran; Peter N. Blossey

2012-04-01T23:59:59.000Z

370

Energy-momentum relation for solitary waves of relativistic wave equations  

E-Print Network (OSTI)

Solitary waves of relativistic invariant nonlinear wave equation with symmetry group U(1) are considered. We prove that the energy-momentum relation for spherically symmetric solitary waves coincides with the Einstein energy-momentum relation for point particles.

T. V. Dudnikova; A. I. Komech; H. Spohn

2005-08-23T23:59:59.000Z

371

Wave | OpenEI Community  

Open Energy Info (EERE)

Wave Wave Home Ocop's picture Submitted by Ocop(5) Member 18 April, 2013 - 13:41 MHK LCOE Reporting Guidance Draft Cost Current DOE LCOE numerical modeling Performance Tidal Wave To normalize competing claims of LCOE, DOE has developed-for its own use-a standardized cost and performance data reporting process to facilitate uniform calculation of LCOE from MHK device developers. This standardization framework is only the first version in what is anticipated to be an iterative process that involves industry and the broader DOE stakeholder community. Multiple files are attached here for review and comment.Upload Files: application/vnd.openxmlformats-officedocument.wordprocessingml.document icon device_performance_validation_data_request.docx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet icon

372

Gravitational waves from gravitational collapse  

Science Conference Proceedings (OSTI)

Gravitational wave emission from stellar collapse has been studied for nearly four decades. Current state-of-the-art numerical investigations of collapse include those that use progenitors with more realistic angular momentum profiles, properly treat microphysics issues, account for general relativity, and examine non-axisymmetric effects in three dimensions. Such simulations predict that gravitational waves from various phenomena associated with gravitational collapse could be detectable with ground-based and space-based interferometric observatories. This review covers the entire range of stellar collapse sources of gravitational waves: from the accretion induced collapse of a white dwarf through the collapse down to neutron stars or black holes of massive stars to the collapse of supermassive stars.

Fryer, Christopher L [Los Alamos National Laboratory; New, Kimberly C [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

373

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

374

Plasma beat-wave accelerator  

Science Conference Proceedings (OSTI)

We perform an analytic study of some quantities relevant to the plasma beat-wave accelerator (PBWA) concept. We obtain analytic expressions for the plasma frequency, longitudinal electron velocity, plasma density and longitudinal plasma electric field of a nonlinear longitudinal electron plasma oscillation with amplitude less than the wave-breaking limit and phase velocity approaching the speed of light. We also estimate the luminosity of a single-pass e/sup +/e/sup -/ linear PBWA collider assuming the energy and collision beamstrahlung are fixed parameters.

Noble, R.J.

1983-06-01T23:59:59.000Z

375

Nonlinear dissipation of circularly polarized Alfven waves due to the beam-induced obliquely propagating waves  

SciTech Connect

In the present study, the dissipation processes of circularly polarized Alfven waves in solar wind plasmas including beam components are numerically discussed by using a 2-D hybrid simulation code. Numerical results suggest that the parent Alfven waves are rapidly dissipated due to the presence of the beam-induced obliquely propagating waves, such as kinetic Alfven waves. The nonlinear wave-wave coupling is directly evaluated by using the induction equation for the parent wave. It is also observed both in the 1-D and 2-D simulations that the presence of large amplitude Alfven waves strongly suppresses the beam instabilities.

Nariyuki, Y. [Faculty of Human Development, University of Toyama, 3190, Toyama City, Toyama 930-8555 (Japan); Hada, T. [Department of Earth System Science and Technology, Kyushu University, 6-1, Kasuga City, Fukuoka 816-8580 (Japan); Tsubouchi, K. [Department of Earth and Planetary Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan)

2012-08-15T23:59:59.000Z

376

Nonlocal theory of electromagnetic wave decay into two electromagnetic waves in a rippled density plasma channel  

SciTech Connect

Parametric decay of a large amplitude electromagnetic wave into two electromagnetic modes in a rippled density plasma channel is investigated. The channel is taken to possess step density profile besides a density ripple of axial wave vector. The density ripple accounts for the momentum mismatch between the interacting waves and facilitates nonlinear coupling. For a given pump wave frequency, the requisite ripple wave number varies only a little w.r.t. the frequency of the low frequency decay wave. The radial localization of electromagnetic wave reduces the growth rate of the parametric instability. The growth rate decreases with the frequency of low frequency electromagnetic wave.

Sati, Priti; Tripathi, V. K. [Indian Institute of Technology, Hauz Khas, Delhi 110054 (India)

2012-12-15T23:59:59.000Z

377

Solitary waves and homoclinic orbits  

Science Conference Proceedings (OSTI)

The notion that fluid motion often organizes itself into coherent structures has increasingly permeated modern fluid dynamics. Such localized objects appear in laminar flows and persist in turbulent states; from the water on windows on rainy days, to the circulations in planetary atmospheres. This review concerns solitary waves in fluids. More specifically, it centres around the mathematical description of solitary waves in a single spatial dimension. Moreover, it concentrates on strongly dissipative dynamics, rather than integrable systems like the KdV equation. One-dimensional solitary waves, or pulses and fronts as they are also called, are the simplest kinds of coherent structure (at least from a geometrical point of view). Nevertheless, their dynamics can be rich and complicated. In some circumstances this leads to the formation of spatio-temporal chaos in the systems giving birth to the solitary waves, and understanding that phenomenon is one of the major goals in the theory outlined in this review. Unfortunately, such a goal is far from achieved to date, and the author assess its current status and incompleteness.

Balmforth, N.J.

1994-03-01T23:59:59.000Z

378

Gravitational Waves from Supersymmetry Breaking  

E-Print Network (OSTI)

In theories of supersymmetry breaking, it is often the case that there is more than one metastable vacuum. First-order phase transitions among such metastable vacua may generate a stochastic background of gravitational waves, the observation of which would provide a direct window into the supersymmetry-breaking sector.

Craig, Nathaniel J

2009-01-01T23:59:59.000Z

379

Wave–Mean Flow Statistics  

Science Conference Proceedings (OSTI)

A relation between the statistics of large-scale waves and the mean flow is derived from the potential enstrophy equations integrated over an isobaric surface. The difference between time-averaged zonal-mean state and the radiative-dynamical ...

Mark R. Schoeberl

1982-10-01T23:59:59.000Z

380

Model for Shock Wave Chaos  

E-Print Network (OSTI)

We propose the following model equation, u[subscript t]+1/2(u[superscript 2]-uu[subscript s])[subscript x]=f(x,u[subscript s]) that predicts chaotic shock waves, similar to those in detonations in chemically reacting ...

Kasimov, Aslan R.

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Shallow Angle Wave Profiling Lidar  

Science Conference Proceedings (OSTI)

A lidar scanning system is described that is primarily designed to measure sea wave shape. The device is capable of measuring real-time spatial profiles over distances of hundreds of meters, and as the lidar must inevitably operate from modest ...

M. R. Belmont; J. M. K. Horwood; R. W. F. Thurley; J. Baker

2007-06-01T23:59:59.000Z

382

Property:Maximum Wave Height(m) at Wave Period(s) | Open Energy Information  

Open Energy Info (EERE)

Wave Height(m) at Wave Period(s) Wave Height(m) at Wave Period(s) Jump to: navigation, search Property Name Maximum Wave Height(m) at Wave Period(s) Property Type String Pages using the property "Maximum Wave Height(m) at Wave Period(s)" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + 10.0 + 10-ft Wave Flume Facility + 10.0 + 11-ft Wave Flume Facility + 10.0 + 2 2-ft Flume Facility + 10.0 + 3 3-ft Wave Flume Facility + 10.0 + 5 5-ft Wave Flume Facility + 10.0 + 6 6-ft Wave Flume Facility + 10.0 + A Alden Large Flume + 0.0 + Alden Wave Basin + 1.0 + C Chase Tow Tank + 3.1 + Coastal Harbors Modeling Facility + 2.3 + Coastal Inlet Model Facility + 2.3 + D Davidson Laboratory Tow Tank + 4.0 + DeFrees Large Wave Basin + 3.0 + DeFrees Small Wave Basin + 3.0 +

383

Observations of a Mesoscale Ducted Gravity Wave  

Science Conference Proceedings (OSTI)

This paper reports coordinated observations of a mesoscale gravity wave made during the FRONTS 84 field experiment conducted in southwestern France in the summer of 1984. The observations were unique in the sense that all relevant wave ...

F. M. Ralph; V. Venkateswaran; M. Crochet

1993-10-01T23:59:59.000Z

384

An Analysis of Wave-Turbulence Interaction  

Science Conference Proceedings (OSTI)

We present the results of an analytical and numerical calculation of the interaction between an internal gravity wave and a wave-induced turbulence. The initial atmospheric state, assumed horizontally homogeneous, is statically and dynamically ...

D. Fua; G. Chimonas; F. Einaudi; O. Zeman

1982-11-01T23:59:59.000Z

385

Worldwide Measurements of Directional Wave Spreading  

Science Conference Proceedings (OSTI)

The directional spreading of waves is important for both theoretical and practical reasons. Enough measurements have now been made to draw conclusions about the behavior of wave spreading at sites in different climatic regimes. The measurements ...

George Z. Forristall; Kevin C. Ewans

1998-04-01T23:59:59.000Z

386

Generation of Turbulence by Atmospheric Gravity Waves  

Science Conference Proceedings (OSTI)

The standard current criterion for the generation of turbulence by atmospheric gravity waves and for the associated limitation on wave growth is based upon the standard criterion for static instability of the unperturbed atmosphere, namely, that ...

Colin O. Hines

1988-04-01T23:59:59.000Z

387

Interactions between Rain and Wind Waves  

Science Conference Proceedings (OSTI)

Effects of rain on surface waves have been investigated in a circulating wind-wave tank. Surface displacement and slope spectra under different wind velocities were measured near the upwind and downwind edges of a region with simulated rains. ...

Ying-Keung Poon; Shih Tang; Jin Wu

1992-09-01T23:59:59.000Z

388

Equatorial Solitary Waves. Part 2: Envelope Solitons  

Science Conference Proceedings (OSTI)

Via the method of multiple scales, it is shown that the time and space evolution of the envelope of wave packets of weakly nonlinear, strongly dispersive equatorial waves is governed by the Nonlinear Schrödinger equation. The diverse phenomena of ...

John P. Boyd

1983-03-01T23:59:59.000Z

389

Generation of sand bars under surface waves  

E-Print Network (OSTI)

(cont.) Experiments were performed in a large wave flume to validate the theory and to study additional aspects of sand bar evolution. The wave envelope and bar profile were recorded for low and high beach reflection, ...

Hancock, Matthew James, 1975-

2005-01-01T23:59:59.000Z

390

Wind effects on shoaling wave shape  

E-Print Network (OSTI)

breaking in the presence of wind drift and swell. J. Fluidlin, 1995: Asymmetry of wind waves studied in a laboratorycoupling between swell and wind-waves. J. Phys. Oceanogr. ,

Feddersen, F; Veron, F

2005-01-01T23:59:59.000Z

391

Inertia–Gravity Waves in the Stratosphere  

Science Conference Proceedings (OSTI)

The propagation and refraction of stationary inertia–gravity waves in the winter stratosphere is examined with ray tracing. Due to their smaller vertical group velocity these waves experience more lateral ray movement and horizontal refraction ...

Timothy J. Dunkerton

1984-12-01T23:59:59.000Z

392

Enhanced and Inhibited Gravity Wave Spectra  

Science Conference Proceedings (OSTI)

Balloon measurements were used to investigate gravity waves in the upper troposphere and lower stratosphere above the Canadian high Arctic. The amount of gravity wave activity in the stratosphere was found to be related to particular ...

James A. Whiteway

1999-05-01T23:59:59.000Z

393

Energy Transmission by Barotropic Rossby Waves Revisited  

Science Conference Proceedings (OSTI)

This article presents a semianalytic method to investigate the properties of energy transmission across bottom topography by barotropic Rossby waves. The method is first used to revisit the analytical estimates derived from wave-matching ...

R. P. Matano; E. D. Palma

2005-11-01T23:59:59.000Z

394

Radiative Forcing of Stationary Planetary Waves  

Science Conference Proceedings (OSTI)

The stationary wave components of the planetary-scale circulation are maintained by topographic forcing and by latent and sensible heat transfers and radiation. These waves have a potential vorticity balance mainly due to vertically differential ...

Leo J. Donner; Hsiao-Lan Kuo

1984-10-01T23:59:59.000Z

395

Rossby Wave Propagation an Beta-Planes  

Science Conference Proceedings (OSTI)

The numerical modeling of stratospheric, quasi-geostrophic Rossby wave propagation on a beta-plane channel is examined to determine how wave propagation is affected by the use of low horizontal (spectral) resolution. This study considers time ...

Donal O'Sullivan

1988-01-01T23:59:59.000Z

396

Solving general shallow wave equations on surfaces  

Science Conference Proceedings (OSTI)

We propose a new framework for solving General Shallow Wave Equations (GSWE) in order to efficiently simulate water flows on solid surfaces under shallow wave assumptions. Within this framework, we develop implicit schemes for solving the external forces ...

Huamin Wang; Gavin Miller; Greg Turk

2007-08-01T23:59:59.000Z

397

Shock Waves in Currents and Outflows  

Science Conference Proceedings (OSTI)

Shock waves are discontinuities (in the physical properties of a fluid) which behave in an organized manner. The possibility that such waves may occur in oceanic boundary currents is examined with a nonlinear two-layer analytical model. Attention ...

Doron Nof

1984-11-01T23:59:59.000Z

398

Resonant Planetary Waves in a Spherical Atmosphere  

Science Conference Proceedings (OSTI)

A global model of planetary wave propagation in a spherical atmosphere is used to examine the spectrum of free or resonant planetary waves of the solstitial stratosphere. These free modes are located by forcing the model with a weak periodic ...

Mark R. Schoeberl; John H. E. Clark

1980-01-01T23:59:59.000Z

399

Mesoscale Energy Spectra of Moist Baroclinic Waves  

Science Conference Proceedings (OSTI)

The role of moist processes in the development of the mesoscale kinetic energy spectrum is investigated with numerical simulations of idealized moist baroclinic waves. Dry baroclinic waves yield upper-tropospheric kinetic energy spectra that ...

Michael L. Waite; Chris Snyder

2013-04-01T23:59:59.000Z

400

Anelastic Internal Wave Packet Evolution and Stability  

Science Conference Proceedings (OSTI)

As upward-propagating anelastic internal gravity wave packets grow in amplitude, nonlinear effects develop as a result of interactions with the horizontal mean flow that they induce. This qualitatively alters the structure of the wave packet. The ...

Hayley V. Dosser; Bruce R. Sutherland

2011-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Breaking of Wind-Generated Waves  

Science Conference Proceedings (OSTI)

Breaking of wind-generated waves was studies in a laboratory tank. The critical surface slope and global wave steepness for inception of breaking were evaluated. Besides the frequency of occurrence, two other characteristic quantities, height and ...

Delun Xu; Paul A. Hwang; Jin Wu

1986-12-01T23:59:59.000Z

402

The Dynamic Balance of Internal Waves  

Science Conference Proceedings (OSTI)

For oceanic internal waves with vertical scales larger than 1 m the evolution of the spectrum is adequately described by weak-interaction theory. Based on simple physical arguments, a model for internal-wave energy dissipation predicts ...

C. Henry McComas; Peter Müller

1981-07-01T23:59:59.000Z

403

How to excite a rogue wave  

Science Conference Proceedings (OSTI)

We propose initial conditions that could facilitate the excitation of rogue waves. Understanding the initial conditions that foster rogue waves could be useful both in attempts to avoid them by seafarers and in generating highly energetic pulses in optical fibers.

Akhmediev, N.; Ankiewicz, A. [Optical Sciences Group, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia); Soto-Crespo, J. M. [Instituto de Optica, CSIC, Serrano 121, 28006 Madrid (Spain)

2009-10-15T23:59:59.000Z

404

Wave Breaking Dissipation Observed with “SWIFT” Drifters  

Science Conference Proceedings (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

405

Eady Edge Waves and Rapid Development  

Science Conference Proceedings (OSTI)

Perturbations of the classical Eady model are treated in terms of the system's two intrinsic baroclinic edge waves. This provides a simple quantitative example of the wave coupling interpretation of quasigeostrophic instability and a compact ...

H. C. Davies; C. H. Bishop

1994-07-01T23:59:59.000Z

406

Applications Guide for Guided Wave Inspection Technology  

Science Conference Proceedings (OSTI)

In recent years, long-range ultrasonic guided wave technology has been emerging as a quick and economical method of obtaining a comprehensive view of the condition of piping systems, tubing, and other components (including areas that are difficult to access) by launching and detecting waves from a remote accessible location. This report describes how ultrasonic guided waves can be applied for various components and systems. Guidance on surface preparation, generation of various wave modes, and interpreta...

2005-03-21T23:59:59.000Z

407

Quantum thermal waves in quantum corrals  

E-Print Network (OSTI)

In this paper the possibility of the generation of the thermal waves in 2D electron gas is investigated. In the frame of the quantum heat transport theory the 2D quantum hyperbolic heat transfer equation is formulated and numerically solved. The obtained solutions are the thermal waves in electron 2D gases. As an exapmle the thermal waves in quantum corrals are described. Key words: 2D electron gas, quantum corrals, thermal waves.

J. Marciak-Kozlowska; M. Kozlowski

2004-05-07T23:59:59.000Z

408

Wave-driven Countercurrent Plasma Centrifuge  

SciTech Connect

A method for driving rotation and a countercurrent flow in a fully ionized plasma centrifuge is described. The rotation is produced by radiofrequency waves near the cyclotron resonance. The wave energy is transferred into potential energy in a manner similar to the ? channeling effect. The countercurrent flow may also be driven by radiofrequency waves. By driving both the rotation and the flow pattern using waves instead of electrodes, physical and engineering issues may be avoided.

A.J. Fetterman and N.J. Fisch

2009-03-20T23:59:59.000Z

409

Superadiabatic Excess and Gravity Wave Saturation  

Science Conference Proceedings (OSTI)

Attention is called to a recent calculation of the superadiabatic excess—the ratio of wave amplitude at saturation to wave amplitude at convective instability threshold—caused by a saturated gravity wave. (This excess is also referred to as the ...

J. Weinstock

1988-11-01T23:59:59.000Z

410

Shock Waves in Quasicrystals JOHANNES ROTH  

E-Print Network (OSTI)

Shock Waves in Quasicrystals JOHANNES ROTH Institut f�ur Theoretische und Angewandte Physik, Universit�at Stuttgart, D­70550 Stuttgart, Germany Abstract Shock waves in quasicrystals of the AlCuLi type: at low shock wave intensity the system reacts elastically, at high intensities it is turned amorphous

Roth, Johannes

411

Interaction of light with gravitational waves  

E-Print Network (OSTI)

The physical properties of electromagnetic waves in the presence of a gravitational plane wave are analyzed. Formulas for the Stokes parameters describing the polarization of light are obtained in closed form. The particular case of a constant amplitude gravitational wave is worked out explicitly.

Shahen Hacyan

2013-05-20T23:59:59.000Z

412

Decay of a Near-Inertial Wave  

Science Conference Proceedings (OSTI)

The decay of a downward propagating near-inertial wave was observed over four days. During this short period, the energy of the near-inertial wave decreased by 70%. The shear layers produced by the wave were regions of enhanced turbulent ...

Dave Hebert; J. N. Moum

1994-11-01T23:59:59.000Z

413

Large hazardous floods as translatory waves  

Science Conference Proceedings (OSTI)

The theory for non-stationary flow in translatory waves is developed for an inclined plane in a prismatic channel and a funneling channel. The existence of translatory waves traveling over dry land or superimposed on constant flow is established, and ... Keywords: Flood hazard, Flow simulation, Jokulhlaup, Translatory waves

Jonas Elíasson; Snorri Pall Kjaran; Sigurdur Larus Holm; Magnus Tumi Gudmundsson; Gudrun Larsen

2007-10-01T23:59:59.000Z

414

Robots on Waves By Cianna Beltran, Editor  

E-Print Network (OSTI)

. The Wave Glider is about the size of a surfboard with a wave-based propulsion system and two solar panels that move across the ocean measuring weather and water quality. The goal is that these robot wave riders such as water quality and weather conditions. Photo courtesy of http://liquidr.com/ #12;Page 2Seawords, December

415

Suppression of Stationary Planetary Waves by Internal Gravity Waves in the Mesosphere  

Science Conference Proceedings (OSTI)

The suppression of stationary planetary waves by internal gravity waves in the mesosphere is treated using a quasi-geostrophic model on a midlatitude beta-plane. The drag forces due to internal gravity waves are parameterized based on the wave ...

Saburo Miyahara

1985-01-01T23:59:59.000Z

416

THE EFFECTS OF WAVE ESCAPE ON FAST MAGNETOSONIC WAVE TURBULENCE IN SOLAR FLARES  

Science Conference Proceedings (OSTI)

One of the leading models for electron acceleration in solar flares is stochastic acceleration by weakly turbulent fast magnetosonic waves ({sup f}ast waves{sup )}. In this model, large-scale flows triggered by magnetic reconnection excite large-wavelength fast waves, and fast-wave energy then cascades from large wavelengths to small wavelengths. Electron acceleration by large-wavelength fast waves is weak, and so the model relies on the small-wavelength waves produced by the turbulent cascade. In order for the model to work, the energy cascade time for large-wavelength fast waves must be shorter than the time required for the waves to propagate out of the solar-flare acceleration region. To investigate the effects of wave escape, we solve the wave kinetic equation for fast waves in weak turbulence theory, supplemented with a homogeneous wave-loss term. We find that the amplitude of large-wavelength fast waves must exceed a minimum threshold in order for a significant fraction of the wave energy to cascade to small wavelengths before the waves leave the acceleration region. We evaluate this threshold as a function of the dominant wavelength of the fast waves that are initially excited by reconnection outflows.

Pongkitiwanichakul, Peera; Chandran, Benjamin D. G. [Space Science Center and Department of Physics, University of New Hampshire, Durham, NH 03824 (United States); Karpen, Judith T. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); DeVore, C. Richard, E-mail: pbu3@unh.edu, E-mail: benjamin.chandran@unh.edu, E-mail: judy.karpen@nasa.gov, E-mail: devore@nrl.navy.mil [Naval Research Laboratory, Washington, DC 20375 (United States)

2012-09-20T23:59:59.000Z

417

The Effects of Wave Energy Converters on a Monochromatic Wave Climate  

E-Print Network (OSTI)

in wave energy converters as a possible means of providing renewable energy, the effects of a wave energy The interest in renewable energies is currently increasing due to the reported rise in global temperature is that of wave energy. The research is multifaceted and includes research on the efficiency of wave energy

Fox-Kemper, Baylor

418

To Wave Or Not To Wave? Order Release Policies for Warehouses with an Automated Sorter  

E-Print Network (OSTI)

Wave-based release policies are prevalent in warehouses with an automated sorter, and take different

Gallien, Jérémie

2008-09-08T23:59:59.000Z

419

Water Power Program: Marine and Hydrokinetic Resource Assessment...  

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

the Tidal Streams Resource Map. Tidal Streams Resource Assessment The Assessment of the Energy Production from Tidal Streams in the United States report, created by Georgia Tech,...

420

Assessment and Mapping of the Riverine Hydrokinetic Resource...  

Open Energy Info (EERE)

resource, that account for selected technological factors affecting capture and conversion of the theoretical resource. The technically recoverable resource does not account...

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Dynamic Modeling and Environmental Analysis of Hydrokinetic Energy Extraction.  

E-Print Network (OSTI)

??The world is facing an imminent energy supply crisis. Our well-being is linked to the energy supply, and energy is in high demand in both… (more)

Miller, Veronica Bree

2010-01-01T23:59:59.000Z

422

Implementation of control system for hydrokinetic energy converter  

Science Conference Proceedings (OSTI)

At Uppsala University, a research group is investigating a system for converting the power in freely flowing water using a verticalaxis turbine directly connected to a permanent magnet generator. An experimental setup comprising a turbine, a generator, ...

Katarina Yuen, Senad Apelfröjd, Mats Leijon

2013-01-01T23:59:59.000Z

423

Regulators approve first commercial hydrokinetic projects in the ...  

U.S. Energy Information Administration (EIA)

When the tube sections flex, hydraulic arms move in opposite directions and turn a generator that produces power. Sea snakes are being tested in Scotland and Portugal.

424

Department of Energy Awards $37 Million for Marine and Hydrokinetic...  

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

Energy Technology Development September 9, 2010 - 12:00am Addthis Washington, DC - U.S. Energy Secretary Steven Chu today announced selections for more than 37 million...

425

First Commercial, Grid-Connected, Hydrokinetic Tidal Energy Project...  

Office of Science (SC) Website

Image courtesy of Ocean Renewable Power Company ORPC's TidGen(tm) turbine generator unit. R&D Opportunity Advanced water power technologies include devices capable of extracting...

426

Microsoft PowerPoint - MVD Hydrokinetics, SW Regional Hydropower...  

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

Projects on the Mississippi River Mississippi River Southwestern Federal Hydropower Conference 10 June 2010 Jeff Artman, P.E. MVD Hydropower Business Line Manager Line Manager...

427

Energy 101: Marine and Hydrokinetic Energy | Department of Energy  

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

--Construction --Commercial Weatherization --Commercial Heating & Cooling --Commercial Lighting --Solar Decathlon -Manufacturing Energy Sources -Renewables --Solar --Wind...

428

SITING PROTOCOLS FOR MARINE AND HYDROKINETIC ENERGY PROJECTS  

Science Conference Proceedings (OSTI)

Project Objective: The purpose of this project is to identify and address regulatory issues that affect the cost, time and the management of potential effects as it relates to siting and permitting advanced water power technologies. Background: The overall goal of this effort is to reduce the cost, time and effort of managing potential effects from the development advanced water power projects as it relates to the regulatory process in siting and permitting. To achieve this goal, a multi-disciplinary team will collect and synthesize existing information regarding regulatory processes into a user-friendly online format. In addition, the team will develop a framework for project planning and assessment that can incorporate existing and new information. The team will actively collaborate and coordinate with other efforts that support or influence regulatory process. Throughout the process, the team will engage in an iterative, collaborative process for gathering input and testing ideas that involves the relevant stakeholders across all sectors at the national, regional, and all state levels.

Kopf, Steven; Klure, Justin; Hofford, Anna; McMurray, Greg; Hampton, Therese

2012-07-15T23:59:59.000Z

429

JEDI Marine and Hydrokinetic Model: User Reference Guide  

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

reductions in the short term. For the purpose of this assessment, it was assumed that no learning curve effects are present. Only effects of manufacturing multiple units for the...

430

NREL Developing Numerical Simulation Tool to Study Hydrokinetic...  

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

M.; Li, Y.; Moriarty, P. (2012). "A Large-Eddy Simulation Study of Wake Propagation and Power Production in an Array of Tidal-Current Turbines." Accepted by Proceedings of the...

431

Microsoft PowerPoint - MVD Hydrokinetics, SW Regional Hydropower...  

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

* Free Flow Power Corporation (generators mounted on poles placed in the river bottom) * Hydro Green Energy (barge mounted generators) * MarMC Enterprises (generators submerged in...

432

Extreme wave impinging and overtopping  

E-Print Network (OSTI)

This investigates the velocity fields of a plunging breaking wave impinging on a structure through measurements in a two-dimensional wave tank. As the wave breaks and overtops the structure, so-called green water is generated. The flow becomes multi-phased and chaotic as a highly aerated region is formed in the flow in the vicinity of the structure while water runs up onto the structure. In this study, particle image velocimetry (PIV) was employed to measure the velocity field of the water dominant region. For measurements of an aerated region that cannot be measured by PIV, a new measurement method called bubble image velocimetry (BIV) was developed. The principle and setup of the BIV method were introduced and validated. Mean and turbulence properties were obtained through ensemble averaging repeated tests measured by both methods. The dominant and maximum velocity of the breaking wave and associated green water are discussed for the three distinct phases of the impingement-runup-overtopping sequence. The distribution of the green water velocity along the top of the structure has a nonlinear profile and the maximum velocity occurs near the front of the fast moving water. Using the measured data and applying dimensional analysis, a similarity profile for the green water flow on top of the structure was obtained, and a prediction equation was formulated. The dam breaking solution used for the green water prediction was examined with determining initial water depth based on the experiment conditions. Comparison between measurements, the prediction equation, and the dam breaking flow was made. The prediction equation and the dam break flow with appropriate initial water depth may be used to predict the green water velocity caused by extreme waves in a hurricane. To demonstrate the aeration of the breaking wave and overtopping water, void fraction was also investigated. There is strong aeration in the region of overtopping water front generated by a plunging breaker. Void fraction of overtopping water was measured using a fiber optic reflectometer (FOR). The measured velocity and void fraction were also used to estimate flow rate and water volume of overtopping water.

Ryu, Yong Uk

2006-08-01T23:59:59.000Z

433

Radar Imaging Mechanism of the Seabed: Results of the C-STAR Experiment in 1996 with Special Emphasis on the Relaxation Rate of Short Waves due to Current Variations  

Science Conference Proceedings (OSTI)

During the field experiment of the Coastal Sediment Transport Assessment using SAR imagery project of the Marine Science and Technology program of the European Commission an Air–Sea Interaction Drift Buoy (ASIB) system was equipped with special ...

Ingo Hennings; Blandine Lurin; Norbert Didden

2001-07-01T23:59:59.000Z

434

Two Types of Wave Breaking in an Aquaplanet GCM  

Science Conference Proceedings (OSTI)

The characteristics of two distinct types of wave breaking in an aquaplanet general circulation model (GCM) are described. A systematic analysis of wave breaking is possible because when a baroclinic wave packet is present, the wave breaking ...

Sukyoung Lee; Steven Feldstein

1996-03-01T23:59:59.000Z

435

Effects of Wave—Wave and Wave-Mean Flow Interactions on the Growth and Maintenance of Transient Planetary Waves in the Presence of a Mean Thermal Restoring Force  

Science Conference Proceedings (OSTI)

In order to clarify the effects of wave—wave and wave-mean flow interactions on the growth and maintenance of extratropical tropospheric transient waves in the presence of a mean thermal restoring force, numerical experiments are conducted with ...

Y. Hayashi; D. G. Golder

1987-11-01T23:59:59.000Z

436

Interaction of Ocean Waves with a Soft Bottom  

Science Conference Proceedings (OSTI)

Soft muddy bottoms have significant effects on properties of water waves which propagate over them. The wave dispersion equation is modified and wave energy is dissipated by the coupling between the waves in water and those induced in the mud ...

S. V. Hsiao; O. H. Shemdin

1980-04-01T23:59:59.000Z

437

Reconstruction of nonlinear wave propagation  

DOE Patents (OSTI)

Disclosed are systems and methods for characterizing a nonlinear propagation environment by numerically propagating a measured output waveform resulting from a known input waveform. The numerical propagation reconstructs the input waveform, and in the process, the nonlinear environment is characterized. In certain embodiments, knowledge of the characterized nonlinear environment facilitates determination of an unknown input based on a measured output. Similarly, knowledge of the characterized nonlinear environment also facilitates formation of a desired output based on a configurable input. In both situations, the input thus characterized and the output thus obtained include features that would normally be lost in linear propagations. Such features can include evanescent waves and peripheral waves, such that an image thus obtained are inherently wide-angle, farfield form of microscopy.

Fleischer, Jason W; Barsi, Christopher; Wan, Wenjie

2013-04-23T23:59:59.000Z

438

Millimeter-wave active probe  

DOE Patents (OSTI)

A millimeter-wave active probe for use in injecting signals with frequencies above 50GHz to millimeter-wave and ultrafast devices and integrated circuits including a substrate upon which a frequency multiplier consisting of filter sections and impedance matching sections are fabricated in uniplanar transmission line format. A coaxial input and uniplanar 50 ohm transmission line couple an approximately 20 GHz input signal to a low pass filter which rolls off at approximately 25 GHz. An input impedance matching section couples the energy from the low pass filter to a pair of matched, antiparallel beam lead diodes. These diodes generate odd-numberd harmonics which are coupled out of the diodes by an output impedance matching network and bandpass filter which suppresses the fundamental and third harmonics and selects the fifth harmonic for presentation at an output.

Majidi-Ahy, Gholamreza (Sunnyvale, CA); Bloom, David M. (Portola Valley, CA)

1991-01-01T23:59:59.000Z

439

Statistics of Extreme Waves in Random Media  

E-Print Network (OSTI)

Waves traveling through random media exhibit random focusing that leads to extremely high wave intensities even in the absence of nonlinearities. Although such extreme events are present in a wide variety of physical systems and the statistics of the highest waves is important for their analysis and forecast, it remains poorly understood in particular in the regime where the waves are highest. We suggest a new approach that greatly simplifies the mathematical analysis and calculate the scaling and the distribution of the highest waves valid for a wide range of parameters.

Jakob J. Metzger; Ragnar Fleischmann; Theo Geisel

2013-11-18T23:59:59.000Z

440

Thermal Gravitational Waves from Primordial Black Holes  

E-Print Network (OSTI)

Thermal gravitational waves can be generated in various sources such as, in the cores of stars, white dwarfs and neutron stars due to the fermion collisions in the dense degenerate Fermi gas. Such high frequency thermal gravitational waves can also be produced during the collisions in a gamma ray burst or during the final stages of the evaporation of primordial black holes. Here we estimate the thermal gravitational waves from primordial black holes and estimate the integrated energy of the gravitational wave emission over the entire volume of the universe and over Hubble time. We also estimate the gravitational wave flux from gamma ray bursts and jets.

C. Sivaram; Kenath Arun

2010-05-19T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

OTRC Wave Basin | Open Energy Information  

Open Energy Info (EERE)

OTRC Wave Basin OTRC Wave Basin Jump to: navigation, search Basic Specifications Facility Name OTRC Wave Basin Overseeing Organization Texas A&M (OTRC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 45.7 Beam(m) 30.5 Depth(m) 5.8 Water Type Freshwater Cost(per day) $300/hour (excluding labor) Special Physical Features 4.6m wide x 9.1m long x 16.8m deep pit with adjustable depth floor in test area Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 0.6 Length of Effective Tow(m) 27.4 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.9 Maximum Wave Height(m) at Wave Period(s) 4.0 Maximum Wave Length(m) 25 Wave Period Range(s) 4.0 Current Velocity Range(m/s) 0.6 Programmable Wavemaking Yes Wavemaking Description GEDAP 3D wave generation software, 48 hinged flap wave generator

442

Accounting for Surface Wave Distortion of the Marine Wind Profile in Low-Level Ocean Storms Wind Measurements  

Science Conference Proceedings (OSTI)

Marine wind measurements at three heights (3.0,4.5, and 5.0 m) from both moored and drifting buoys during the Ocean Storms Experiment are described. These winds are compared with each other, with winds from ships, from subsurface ambient acoustic ...

W. G. Large; J. Morzel; G. B. Crawford

1995-11-01T23:59:59.000Z

443

Waves  

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

Acerca de las ondas Acerca de las ondas Volver Principal ESTOY PERDIDO!!! Hablando en términos simples, una onda es algo que oscila en el tiempo y en el espacio. Las ondas se extienden de un lugar a otro. Pueden vibrar periódicamente (como el sonido de la nota de un violín) o de modo no periódico (como en el sonido de una explosión, por ejemplo.) Todas las ondas tienen las siguientes propiedades: El tamaño de la vibración se llama su amplitud. Cuán seguido ocurre la vibración es la frecuencia. La distancia que la onda ha recorrido entre dos máximos es la longitud de onda. Puesto que una onda dada se propaga a una determinada velocidad, a través de un material, si Usted incrementa la frecuencia de la onda, la distancia entre crestas disminuirá (es decir se produce una disminución

444

Nonlinear whistler wave scattering in space plasmas  

Science Conference Proceedings (OSTI)

In this paper the evolution of nonlinear scattering of whistler mode waves by kinetic Alfven waves (KAW) in time and two spatial dimensions is studied analytically. The authors suggest this nonlinear process as a mechanism of kinetic Alfven wave generation in space plasmas. This mechanism can explain the dependence of Alfven wave generation on whistler waves observed in magnetospheric and ionospheric plasmas. The observational data show a dependence for the generation of long periodic pulsations Pc5 on whistler wave excitation in the auroral and subauroral zone of the magnetosphere. This dependence was first observed by Ondoh T.I. For 79 cases of VLF wave excitation registered by Ondoh at College Observatory (L=64.6 N), 52 of them were followed by Pc5 geomagnetic pulsation generation. Similar results were obtained at the Loparskaia Observatory (L=64 N) for auroral and subauroral zone of the magnetosphere. Thus, in 95% of the cases when VLF wave excitation occurred the generation of long periodic geomagnetic pulsations Pc5 were observed. The observations also show that geomagnetic pulsations Pc5 are excited simultaneously or insignificantly later than VLF waves. In fact these two phenomena are associated genetically: the excitation of VLF waves leads to the generation of geomagnetic pulsations Pc5. The observations show intensive generation of geomagnetic pulsations during thunderstorms. Using an electromagnetic noise monitoring system covering the ULF range (0.01-10 Hz) A.S. Fraser-Smith observed intensive ULF electromagnetic wave during a large thunderstorm near the San-Francisco Bay area on September 23, 1990. According to this data the most significant amplification in ULF wave activity was observed for waves with a frequency of 0.01 Hz and it is entirely possible that stronger enhancements would have been measured at lower frequencies.

Yukhimuk, V.; Roussel-Dupre, R.

1997-04-01T23:59:59.000Z

445

Hybrid Renewable Energy Systems for a Dynamically Positioned Buoy  

E-Print Network (OSTI)

course assignments. From left to right, the 2012 Fellows: Laryssa Galvez, Ariel Pacific, Chelsea Maccani

Wood, Stephen L.

446

Dynamic response analysis of spar buoy floating wind turbine systems  

E-Print Network (OSTI)

The importance of alternative energy development has been dramatically increased by the dwindling supplies of oil and gas, and our growing efforts to protect our environment. A variety of meaningful steps have been taken ...

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

2008-01-01T23:59:59.000Z

447

Demand for petrochem feedstock to buoy world LPG industry  

Science Conference Proceedings (OSTI)

This paper reports that use of liquefied petroleum gas as petrochemical feedstock will increase worldwide, providing major growth opportunities for LPG producers. World exports of liquefied petroleum gas will increase more slowly than production as producers choose to use LPG locally as chemical feedstock and export in value added forms such as polyethylene. So predicts Poten and Partners Inc., New York. Poten forecasts LPG production in exporting countries will jump to 95 million tons in 2010 from 45 million tons in 1990. However, local and regional demand will climb to 60 million tons/year from 23 million tons/year during the same period. So supplies available for export will rise to 35 million tons in 2010 from 22 million tons in 1990.

Not Available

1992-05-18T23:59:59.000Z

448

Analysis and Prediction of Ocean Swell Using Instrumented Buoys  

Science Conference Proceedings (OSTI)

During the period 20–23 September 1990, the remnants of Supertyphoon Flo moved into the central North Pacific Ocean with sustained wind speeds of 28 m s?1. The strong wind and large fetch area associated with this storm generated long-period ...

Theodore Mettlach; David Wang; Paul Wittmann

1994-04-01T23:59:59.000Z

449

Buoy-Calibrated Winds over the Gulf of Mexico  

Science Conference Proceedings (OSTI)

The large variability of the Gulf of Mexico wind field indicates that high-resolution wind data will be required to represent the weather systems affecting ocean circulation. This report presents methods and results of the calculation of a ...

Robert C. Rhodes; J. Dana Thompson; Alan J. Wallcraft

1989-08-01T23:59:59.000Z

450

Comparisons on offshore structure responses to random waves using linear and high-order wave theories  

E-Print Network (OSTI)

The predicted responses of an offshore structure when the wave induced kinematics are computed from different estimation methods can change significantly. The sometimes controversial results have recently motivated the development of a new methodology for wave kinematics prediction. While the methods commonly used by the offshore industry are empirical and semi-empirical modifications of Linear (random) Wave Theory, the new approach (Hybrid Wave Model) satisfies the principles of hydrodynamics and explicitly considers the non-linear effect of the wave-wave interactions on wave elevation, kinematics and evolution. This methodology has been proven to be more accurate and reliable for the estimations of wave kinematics, but its impact on the prediction of the structural response is yet to be investigated. In this study, the performance of the new methodology arid other methods currently used for kinematics prediction was tested. The (surge) response of two offshore structures designed specially for deep-oil production was estimated using three methods (Hybrid Wave Model, Wheeler "Stretching" and Linear Extrapolation) and compared with the corresponding laboratory measurements. The wave forces were computed from the conventional Morison Equation evaluating the ambient wave kinematics from the wave elevation measurements. A numerical scheme based on a Finite Element time integration technique (Newmark-beta method) was used for the response evaluation after it had been validated and calibrated by an analytical (linear) solution and measured responses for regular waves. The comparisons between measured and predicted responses using kinematics calculated from the Hybrid Wave Model showed excellent agreement, specially for the low frequency components, while those using methods based on linear modifications rendered poor underestimations. The low frequency (peak) responses of these deep-water offshore structures were found to be greatly dominated by very low frequency wave excitations, which are mainly due to the wave-wave interactions.

Ramos Heredia, Rafael Juda

1995-01-01T23:59:59.000Z

451

Property:Wave Direction | Open Energy Information  

Open Energy Info (EERE)

Direction Direction Jump to: navigation, search Property Name Wave Direction Property Type String Pages using the property "Wave Direction" Showing 25 pages using this property. (previous 25) (next 25) A Alden Small Flume + Uni-Directional + Alden Wave Basin + Both + C Carderock Maneuvering & Seakeeping Basin + Both + Carderock Tow Tank 2 + Uni-Directional + Carderock Tow Tank 3 + Uni-Directional + Chase Tow Tank + Uni-Directional + Coastal Harbors Modeling Facility + Uni-Directional + Coastal Inlet Model Facility + Uni-Directional + Coastal Structures Modeling Complex + Both + D Davidson Laboratory Tow Tank + Uni-Directional + DeFrees Large Wave Basin + Uni-Directional + DeFrees Small Wave Basin + Uni-Directional + H Haynes Wave Basin + Both +

452

Trajectory eigenmodes of an orbiting wave source  

E-Print Network (OSTI)

Resonances usually result from wave superpositions in cavities where they are due to the wave spatio-temporal folding imposed by the boundaries. These energy accumulations are the signature of the cavity eigenmodes. Here we study a situation in which wave superposition results from the motion of a source emitting sustained overlapping waves. It is found that resonances can be produced in an unbounded space, the boundary conditions being now defined by the trajectory. When periodic trajectories are investigated, it is found that for a discrete subset of orbits, resonant wave modes are excited. Trajectory eigenmodes thus emerge. These modes have three attributes. Their associated resonant wave fields are the Fourier transform of the source's trajectory. They are non-radiative and they satisfy the perimeter Bohr-Sommerfeld quantization rule.

Emmanuel Fort; Yves Couder

2013-07-23T23:59:59.000Z

453

Refrigeration system having standing wave compressor  

DOE Patents (OSTI)

A compression-evaporation refrigeration system, wherein gaseous compression of the refrigerant is provided by a standing wave compressor. The standing wave compressor is modified so as to provide a separate subcooling system for the refrigerant, so that efficiency losses due to flashing are reduced. Subcooling occurs when heat exchange is provided between the refrigerant and a heat pumping surface, which is exposed to the standing acoustic wave within the standing wave compressor. A variable capacity and variable discharge pressure for the standing wave compressor is provided. A control circuit simultaneously varies the capacity and discharge pressure in response to changing operating conditions, thereby maintaining the minimum discharge pressure needed for condensation to occur at any time. Thus, the power consumption of the standing wave compressor is reduced and system efficiency is improved.

Lucas, Timothy S. (Glen Allen, VA)

1992-01-01T23:59:59.000Z

454

Interactions and Focusing of Nonlinear Water Waves  

E-Print Network (OSTI)

The coupled cubic nonlinear Schr\\"odinger (CNLS) equations are used to study modulational instabilities of a pair of nonlinearly interacting two-dimensional waves in deep water. It has been shown that the full dynamics of these interacting waves gives rise to localized large-amplitude wavepackets (wave focusing). In this short letter we attempt to verify this result numerically using a Fourier spectral method for the CNLS equations.

Harihar Khanal; Stefan C. Mancas; Shahrdad Sajjadi

2013-01-17T23:59:59.000Z

455

Excitation of a slow wave structure  

SciTech Connect

The Green's function on a slow wave structure is constructed. The Green's function includes all radial modes, and for each radial mode, all space harmonics. We compare the analytic solution of the frequency response on the slow wave structure with that obtained from a particle-in-cell code. Favorable comparison is obtained when the first few lower order modes are resonantly excited. This gives some confidence in the prediction of converting a pulse train into radiation using a slow wave structure.

Zhang Peng; Lau, Y. Y. [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States); Hoff, Brad; French, D. M. [Air Force Research Laboratory, Kirtland AFB, Albuquerque, New Mexico 87117 (United States); Luginsland, J. W. [Air Force Office of Scientific Research, Arlington, Virginia 22203 (United States)

2012-12-15T23:59:59.000Z

456

Phase-Coherent Amplification of Matter Waves  

Science Conference Proceedings (OSTI)

... in optical pulsed-dye laser amplifiers that are not well aligned. ... Superradiance is based on matter-wave bosonic stimulation, and thus the probability ...

2010-07-12T23:59:59.000Z

457

WindWaveFloat Final Report  

DOE Green Energy (OSTI)

capacity factor, and greater stability of the electrical power delivered to the grid. The research conducted under this grant investigated the integration of several wave energy device types into the WindFloat platform. Several of the resulting system designs demonstrated technical feasibility, but the size and design constraints of the wave energy converters (technical and economic) make the WindWaveFloat concept economically unfeasible at this time. Not enough additional generation could be produced to make the additional expense associated with wave energy conversion integration into the WindFloat worthwhile.

Alla Weinstein, Dominique Roddier, Kevin Banister

2012-03-30T23:59:59.000Z

458

Millimeter Wave Sensors for Clean Energy  

Science Conference Proceedings (OSTI)

Millimeter wave sensor data on refractory used for clean coal gasification will also be presented. Future applications in the area of clean energy will be ...

459

Millimeter-wave polarimetry instrumentation and analysis  

E-Print Network (OSTI)

Society of Photo-Optical Instrumentation Engineers (SPIE)of Photo-Optical Instrumentation Engineers (SPIE) ConferenceWave Polarimetry Instrumentation and Analysis A dissertation

Bierman, Evan M.

2011-01-01T23:59:59.000Z

460

Lower Hybrid to Whistler Wave Conversion  

Science Conference Proceedings (OSTI)

In this presentation we discuss recent work concerning the conversion of whistler waves to lower hybrid waves (as well as the inverse process). These efforts have been motivated by the issue of attenuation of upward propagating whistler waves in the ionosphere generated by VLF transmitters on the ground, i.e., the 'Starks 20 db' problem, which affects the lifetimes of energetic electrons trapped in the geomagnetic field at low magnetic altitude (L). We discuss recent fluid and kinetic plasma simulations as well as ongoing experiments at UCLA to quantify linear and nonlinear mode conversion of lower hybrid to whistler waves.

Winske, Dan [Los Alamos National Laboratory

2012-07-16T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Shock Waves in Weakly Compressed Granular Media  

E-Print Network (OSTI)

We experimentally probe nonlinear wave propagation in weakly compressed granular media, and observe a crossover from quasi-linear sound waves at low impact, to shock waves at high impact. We show that this crossover grows with the confining pressure $P_0$, whereas the shock wave speed is independent of $P_0$ --- two hallmarks of granular shocks predicted recently. The shocks exhibit powerlaw attenuation, which we model with a logarithmic law implying that local dissipation is weak. We show that elastic and potential energy balance in the leading part of the shocks.

Siet van den Wildenberg; Rogier van Loo; Martin van Hecke

2013-04-23T23:59:59.000Z

462

Slow Wave Structures for Charged Particle Applications  

of light in free space. This slower wave speed is important for acceleration of charged particles. The special shape of the cross-

463

Hydropower, Wave and Tidal Technologies Available for ...  

Site Map; Printable Version; Share this resource. Send a link to Hydropower, Wave and Tidal Technologies Available for Licensing - Energy Innovation Portalto someone ...

464

Dissipative Waves Excited by Gravity-Wave Encounters with the Stably Stratified Planetary Boundary Layer  

Science Conference Proceedings (OSTI)

We suggest that the strata of strong echo returns frequently revealed by remote-sensor records of the stably stratified planetary bound layer (PBL) represent the wavefronts of dissipative waves (viscous and thermal-conduction waves) excited by ...

William H. Hooke; R. Michael Jones

1986-10-01T23:59:59.000Z

465

Convective Generation of Gravity Waves in Venus's Atmosphere: Gravity Wave Spectrum and Momentum Transport  

Science Conference Proceedings (OSTI)

The emission of internal gravity waves from a layer of dry convection embedded within a stable atmosphere with static stability and zonal winds varying in height is calculated. This theory is applied to Venus to investigate whether these waves ...

Stephen S. Leroy; Andrew P. Ingersoll

1995-11-01T23:59:59.000Z

466

On the Representation of Rossby Wave Critical Layers and Wave Breaking in Zonally Truncated Models  

Science Conference Proceedings (OSTI)

A detailed comparison is made between the Stewartson-Warn-Warn analytical solution for a fully nonlinear, nondiffusive Rossby-wave critical layer and a new analytical solution for the corresponding zonally truncated, “wave-mean” or “quasi-linear” ...

P. H. Haynes; M. E. McIntyre

1987-09-01T23:59:59.000Z

467

Frontal Wave Stability during Moist Deformation Frontogenesis. Part I: Linear Wave Dynamics  

Science Conference Proceedings (OSTI)

It has been shown that lower tropospheric potential vorticity zones formed during moist deformation frontogenesis will support growing waves if at some time the frontogenesis ceases. In this paper, the ways in which these waves are affected by ...

Craig H. Bishop; Alan J. Thorpe

1994-03-01T23:59:59.000Z

468

Frontal Wave Stability during Moist Deformation Frontogenesis. Part II: The Suppression of Nonlinear Wave Development  

Science Conference Proceedings (OSTI)

In this paper, the role of horizontal deformation and the associated frontogenetic ageostrophic circulation in suppressing the development of nonlinear waves is assessed. Unless linear barotropic frontal waves can become nonlinear, the associated ...

Craig H. Bishop; Alan J. Thorpe

1994-03-01T23:59:59.000Z

469

Simulation of Inertia–Gravity Waves in a Poleward-Breaking Rossby Wave  

Science Conference Proceedings (OSTI)

Poleward-breaking Rossby waves often induce an upper-level jet streak over northern Europe. Dominant inertia–gravity wave packets are observed downstream of this jet. The physical processes of their generation and propagation, in such a ...

Christoph Zülicke; Dieter Peters

2006-12-01T23:59:59.000Z

470

Spectral Estimates of Gravity Wave Energy and Momentum Fluxes. Part III: Gravity Wave-Tidal Interactions  

Science Conference Proceedings (OSTI)

An application of the gravity wave parameterization scheme developed in the companion papers by Fritts and VanZandt and Fritts and Lu to the mutual interaction of gravity waves and tidal motions is presented. The results suggest that interaction ...

Wentong Lu; David C. Fritts

1993-11-01T23:59:59.000Z

471

Spectral Distribution of Energy Dissipation of Wind-Generated Waves due to Dominant Wave Breaking  

Science Conference Proceedings (OSTI)

This paper considers an experimental attempt to estimate the spectral distribution of the dissipation due to breaking of dominant waves. A field wave record with an approximately 50% dominant-breaking rate was analyzed. Segments of the record, ...

Ian R. Young; Alexander V. Babanin

2006-03-01T23:59:59.000Z

472

Baroclinic Waves with Parameterized Effects of Moisture Interpreted Using Rossby Wave Components  

Science Conference Proceedings (OSTI)

A theoretical framework is developed for the evolution of baroclinic waves with latent heat release parameterized in terms of vertical velocity. Both wave–conditional instability of the second kind (CISK) and large-scale rain approaches are ...

Hylke de Vries; John Methven; Thomas H. A. Frame; Brian J. Hoskins

2010-09-01T23:59:59.000Z

473

Thermally Induced Compression Waves and Gravity Waves Generated by Convective Storms  

Science Conference Proceedings (OSTI)

A three-dimensional, fully compressible cloud model is used to simulate a convective storm in order to investigate the properties of compression waves and gravity waves induced by latent heat release. Time series of the low-level pressure ...

Melville E. Nicholls; Roger A. Pielke Sr.

2000-10-01T23:59:59.000Z

474

Variational Wave Data Assimilation in a Third-Generation Wave Model  

Science Conference Proceedings (OSTI)

The adjoint of the wave model WAM, which runs operationally performing global wave forecast at the European Centre for Medium-Range Weather Forecasts, has been constructed. In this model, the nonlinear interactions are described by the discrete ...

Miriam M. De Las Heras; Gerrit Burgers; Peter A. E. M. Janssen

1994-10-01T23:59:59.000Z

475

A Mesoscale Gravity Wave Event Observed during CCOPE. Part III: Wave Environment and Probable Source Mechanisms  

Science Conference Proceedings (OSTI)

Synoptic and special mesoscale observations taken during the Cooperative Convective Precipitation Experiment (CCOPE) are used to describe the multiscale environment of a gravity wave event, understand the wave-environment interactions that led to ...

Steven E. Koch; Paul B. Dorian

1988-12-01T23:59:59.000Z

476

Full-wave modeling of lower hybrid waves on Alcator C-Mod  

E-Print Network (OSTI)

This thesis focuses on several aspects of the Lower Hybrid (LH) wave physics, the common theme being the development of full-wave simulation codes based on Finite Element Methods (FEM) used in support of experiments carried ...

Meneghini, Orso (Orso-Maria Cornelio)

2012-01-01T23:59:59.000Z

477

Observations of Directional Relaxation of Wind Sea Spectra  

Science Conference Proceedings (OSTI)

Two-dimensional wave spectra were acquired through a NOAA Experimental Research Buoy in 34 m of water off the North Carolina coast (Atlantic Ocean). These are analyzed in ideal wave-growth situations and under rapidly turning winds. The ...

J. H. Allender; J. Albrecht; G. Hamilton

1983-08-01T23:59:59.000Z

478

Excitation of fast waves by slow waves near the lower-hybrid frequency  

SciTech Connect

Resonant and non-resonant decays of short wavelength lower hybrid waves into long wave-length whistler waves and ion acoustic waves are considered. It is shown that the dominant coupling to the ion acoustic mode arises from the magnetic force producing a pressure variation along the magnetic field lines. The growth rate and the threshold condition for this decay instability compare favorably with other decay instabilities near the lower-hybrid frequency. (auth)

Berger, R. L.; Chen, L.

1976-02-01T23:59:59.000Z

479

Global Ocean Surface Wave Simulation Using a Coupled Atmosphere–Wave Model  

Science Conference Proceedings (OSTI)

This study describes a 29-yr (1981–2009) global ocean surface gravity wave simulation generated by a coupled atmosphere–wave model using NOAA/GFDL’s High-Resolution Atmosphere Model (HiRAM) and the WAVEWATCH III surface wave model developed and ...

Yalin Fan; Shian-Jiann Lin; Isaac M. Held; Zhitao Yu; Hendrik L. Tolman

2012-09-01T23:59:59.000Z

480

Equatorward Propagation of Inertia–Gravity Waves due to Steady and Intermittent Wave Sources  

Science Conference Proceedings (OSTI)

A simple ray-tracing model for the equatorward propagation of inertia–gravity waves in the lower stratosphere is investigated. The model is based on a zonally symmetric wave source and incorporates radiative wave damping. It is shown that steady ...

Oliver Bühler

2003-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "wave buoy hydrokinetic" 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

Wave polarizations for a beam-like gravitational wave in quadratic curvature gravity  

E-Print Network (OSTI)

We compute analytically the tidal field and polarizations of an exact gravitational wave generated by a cylindrical beam of null matter of finite width and length in quadratic curvature gravity. We propose that this wave can represent the gravitational wave that keep up with the high energy photons produced in a gamma ray burst (GRB) source.

E. C. de Rey Neto; J. C. N. de Araujo; O. D. Aguiar

2003-11-14T23:59:59.000Z

482

Wave Transformation and Wave-Driven Flow across a Steep Coral Reef  

Science Conference Proceedings (OSTI)

Observations of waves, setup, and wave-driven mean flows were made on a steep coral forereef and its associated lagoonal system on the north shore of Moorea, French Polynesia. Despite the steep and complex geometry of the forereef, and wave ...

Stephen G. Monismith; Liv M. M. Herdman; Soeren Ahmerkamp; James L. Hench

2013-07-01T23:59:59.000Z

483

Hollow Core Fiber Optics for Mid-Wave and Long-Wave Infrared Spectroscopy  

E-Print Network (OSTI)

Hollow Core Fiber Optics for Mid-Wave and Long-Wave Infrared Spectroscopy Jason M. Kriesel and testing of hollow core glass waveguides (i.e., fiber optics) for use in Mid-Wave Infrared (MWIR) and Long related applications, and fiber optics are a key enabling technology needed to improve the utility

484

Wave climate and trends for the Gulf of Mexico: A 30 year wave hindcast  

Science Conference Proceedings (OSTI)

This paper describes wave climate and variability in the Gulf of Mexico based on a 30-years wave hindcast. The North American Regional Reanalysis wind fields (NCEP at NOAA) are employed to drive a third generation spectral wave model with high- ...

Christian M. Appendini; Alec Torres-Freyermuth; Paulo Salles; Jose López-González; E. Tonatiuh Mendoza

485

DeFrees Large Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Large Wave Basin Large Wave Basin Jump to: navigation, search Basic Specifications Facility Name DeFrees Large Wave Basin Overseeing Organization Cornell University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 32.0 Beam(m) 0.6 Depth(m) 0.9 Water Type Freshwater Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 64 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Computer controlled 4m hydraulic wave paddle stroke allows a series of solitary waves to be generated; arbitrary wave shape possible Wave Direction Uni-Directional Simulated Beach Yes

486

Oregon State University OSU | Open Energy Information  

Open Energy Info (EERE)

OSU OSU Jump to: navigation, search Name Oregon State University OSU Address 1148 Kelley Engineering Center Place Corvallis Zip 97331 Sector Marine and Hydrokinetic Phone number 541-737-2995 Website http://www.eecs.orst.edu/msrf 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 Projects: OSU Direct Drive Power Generation Buoys This company is involved in the following MHK Technologies: Oregon State University Columbia Power Technologies Direct Drive Point Absorber This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=Oregon_State_University_OSU&oldid=678417

487

Atmospheric Gravity Waves and Aircraft Turbulence Encounters  

Science Conference Proceedings (OSTI)

We describe aircraft turbulence-atmospheric gravity wave events which occurred during a 2-day period over the Continental Divide. The waves are observed by two microbarograph networks an each side of the divide and last for several hours at a ...

A. J. Bedard Jr.; F. Canavero; F. Einaudi

1986-12-01T23:59:59.000Z

488

Wind Effects on Shoaling Wave Shape  

Science Conference Proceedings (OSTI)

Near the shore, cross-shore winds strongly affect the location of the break point and the breaking-wave height. From casual observation from the beach, wind direction (onshore or offshore) and speed also appear to affect wave shape (i.e., ...

Falk Feddersen; Fabrice Veron

2005-07-01T23:59:59.000Z

489

Gravity Waves, Dynamical Resistance, and Forcing Efficiency  

Science Conference Proceedings (OSTI)

The effect of the dynamical response associated with high-frequency gravity waves on the total energy generated by imposed heating is examined in a 2D linear compressible model. The work performed by waves against a sustained forcing is defined ...

Jeffrey M. Chagnon

2010-06-01T23:59:59.000Z

490

Multiple Gravity-Wave Breaking Levels  

Science Conference Proceedings (OSTI)

It is noted that gravity waves for which |uŻ?c| (uŻ=mean flow speed, c=wave phase speed) has a sharp minimum in the upper troposphere or lower stratosphere will have decaying amplitudes above this level despite exponentially decreasing mean ...

Richard S. Lindzen

1985-02-01T23:59:59.000Z

491

Nonlinear inertial Alfven wave in dusty plasmas  

SciTech Connect

Solitary inertial Alfven wave in the presence of positively and negatively charged dust particles is studied. It is found that electron density dips are formed in the super Alfvenic region and wave amplitude is increased for the case of negatively charged dust particles in comparison with positively charged dust particles in electron-ion plasmas.

Mahmood, S. [Theoretical Plasma Physics Division, P.O. Nilore Islamabad 44000 (Pakistan); National Center for Physics, Shadra Valley, Quaid-i-Azam University Islamabad 44000 (Pakistan); Saleem, H. [National Center for Physics, Shadra Valley, Quaid-i-Azam University Islamabad 44000 (Pakistan)

2011-11-29T23:59:59.000Z

492

Sierra Wave Project Revisited: 50 Years Later  

Science Conference Proceedings (OSTI)

The Sierra Wave Project was the first post–World War II (WWII) mountain meteorology field experiment in the United States designed to study mountain lee-wave phenomena. In its concept, design, organization, and execution, this Air Force–funded ...

Vanda Grubiši?; John M. Lewis

2004-08-01T23:59:59.000Z

493

Gravimagnetic shock waves in the anisotropic plasma  

E-Print Network (OSTI)

The relativistic magnetohydrodynamic equations for the anisotropic magnetoactive plasma are obtained and accurately integrated in the plane gravitational wave metrics. The dependence of the induction mechanism of the gravimagnetic shock waves on the degree of the magnetoactive plasma anisotropy is analyzed.

Yu. G. Ignatyev; D. N. Gorokhov

2011-01-01T23:59:59.000Z