An Evaluation of the U.S. Department of Energy's Marine and by National Research Council, Division on Earth and Life

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

Expanding renewable strength improvement, either in the usa and overseas, has rekindled curiosity within the strength for marine and hydrokinetic (MHK) assets to give a contribution to electrical energy new release. 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. notwithstanding, each one of these allows are for advancements alongside the Mississippi River, and the particular gain learned from all MHK assets is very small. the 1st U.S. advertisement gridconnected undertaking, a tidal undertaking in Maine with a ability of under 1 megawatt (MW), is presently supplying a fragment of that energy to the grid and is because of be totally put in in 2013.

As a part of its evaluation of MHK assets, DOE requested the nationwide study Council (NRC) to supply precise reviews. In reaction, the NRC shaped the Committee on Marine Hydrokinetic strength expertise evaluation. As directed in its assertion of job (SOT), the committee first built an period in-between record, published in June 2011, which involved in the wave and tidal source tests (Appendix B). the present record includes the committee's assessment of all 5 of the DOE source different types in addition to the committee's reviews at the total MHK source overview technique. 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. opinions of the person source evaluate, 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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Extra info for An Evaluation of the U.S. Department of Energy's Marine and Hydrokinetic Resource Assessments

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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. Based on the final assessment report, the assessment group produced estimates of the total theoretical power resource. However, this was done for complete turbine fences, which essentially act as barrages.

However, the committee notes that the tidal resource assessment group abandoned Pk and thereby any evaluation of the technical resource, because of the major uncertainties inherent in specifying parameters (personal communication to the committee from Kevin Haas, Georgia Institute of Technology, March 18, 2011). , Shapiro, 2011). However, a theoretical study by Garrett and Cummins (2013) has examined the maximum power that could be obtained from an array of turbines in an otherwise uniform region of shallow water that is not confined by any lateral boundaries.

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. These waves can travel efficiently away from the area of generation across the ocean to deliver their power to nearshore areas.

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