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By National Research Council, Division on Earth and Life Studies, Ocean Studies Board, Division on Engineering and Physical Sciences, Board on Energy and Environmental Systems, Marine and Hydrokinetic Energy Technology Assessment Committee

ISBN-10: 0309269997

ISBN-13: 9780309269995

Expanding renewable power improvement, either in the usa and overseas, has rekindled curiosity within the capability for marine and hydrokinetic (MHK) assets to give a contribution to electrical energy iteration. those assets derive from ocean tides, waves, and currents; temperature gradients within the ocean; and free-flowing rivers and streams. One degree of the curiosity within the attainable use of those assets for electrical energy new release is the expanding variety of allows which were filed with the Federal strength Regulatory fee (FERC). As of December 2012, FERC had issued four licenses and eighty four initial allows, up from nearly 0 a decade in the past. besides the fact that, almost all these allows are for advancements alongside the Mississippi River, and the particular profit learned from all MHK assets is intensely small. the 1st U.S. advertisement gridconnected venture, a tidal undertaking in Maine with a potential of below 1 megawatt (MW), is at the moment offering a fragment of that energy to the grid and is because of be absolutely put in in 2013.

As a part of its evaluation of MHK assets, DOE requested the nationwide study Council (NRC) to supply unique reviews. In reaction, the NRC shaped the Committee on Marine Hydrokinetic strength know-how review. As directed in its assertion of job (SOT), the committee first constructed an meantime document, published in June 2011, which eager about the wave and tidal source exams (Appendix B). the present record includes the committee's review of all 5 of the DOE source different types in addition to the committee's reviews at the total MHK source review method. This precis specializes in the committee's overarching findings and conclusions concerning a conceptual framework for constructing the source tests, the aggregation of effects right into a unmarried quantity, and the consistency throughout and coordination among the person source exams. reviews of the person source review, additional dialogue of the sensible MHK source base, and overarching conclusions and suggestions are defined in An evaluate of the U.S. division of Energy's Marine and Hydrokinetic source Assessment.

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Additional resources for An Evaluation of the U.S. Department of Energy's Marine and Hydrokinetic Resource Assessments

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2-8 Copyright © National Academy of Sciences. All rights reserved. S. Department of Energy's Marine and Hydrokinetic Resource Assessments Prepublication Draft – Subject to Further Editorial Correction 3 Wave Resource Assessment Power in ocean waves originates as wind energy that is transferred to the sea surface when wind blows over large areas of the ocean. The resulting wave field consists of a collection of waves at different frequencies traveling in various directions, typically characterized by a directional wave spectrum.

Htm, Accessed June 21, 2011. html, Accessed June 21, 2011. S. Neary, K. Stewart, and B. Smith, Virginia Polytechnical Institute, “Validation of tidal current resource assessment,” Presentation to the committee on February 8, 2011. 2-3 Copyright © National Academy of Sciences. All rights reserved. S. Department of Energy's Marine and Hydrokinetic Resource Assessments Prepublication Draft – Subject to Further Editorial Correction developed by the tidal resource assessment group was well designed and executed, and it allows for downloading of the tidal modeling results for further analysis by knowledgeable users.

The maximum power obtainable from the turbine array depends strongly on the local fluid dynamics of the area of interest. Generally, for an array larger than a few kilometers in water shallower than a few tens of meters, the maximum obtainable power will be approximately half the natural frictional dissipation of the undisturbed flow in the region containing the turbines. In deeper water, the natural friction coefficient in this result is replaced by twice the tidal frequency. 7 times the energy flux incident on the vertical cross-sectional area of the array (Garrett and Cummins, 2013).

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An Evaluation of the U.S. Department of Energy's Marine and Hydrokinetic Resource Assessments by National Research Council, Division on Earth and Life Studies, Ocean Studies Board, Division on Engineering and Physical Sciences, Board on Energy and Environmental Systems, Marine and Hydrokinetic Energy Technology Assessment Committee


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