New PDF release: An Evaluation of the U.S. Department of Energy's Marine and

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 strength improvement, either in the usa and in a foreign country, has rekindled curiosity within the power 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 have been filed with the Federal power 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. even though, every one of these allows are for advancements alongside the Mississippi River, and the particular profit discovered from all MHK assets is very small. the 1st U.S. advertisement gridconnected undertaking, a tidal undertaking in Maine with a ability of lower than 1 megawatt (MW), is at the moment providing a fragment of that strength 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 learn Council (NRC) to supply exact reviews. In reaction, the NRC shaped the Committee on Marine Hydrokinetic power know-how overview. As directed in its assertion of activity (SOT), the committee first constructed an intervening time record, published in June 2011, which interested in the wave and tidal source exams (Appendix B). the present document comprises 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 evaluation approach. This precis makes a speciality of 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 tests. evaluations of the person source evaluation, extra dialogue of the sensible MHK source base, and overarching conclusions and proposals are defined in An review 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

Example text

A data record of only 51 months and the lack of full spectral information at all grid points) and then generated parametric fits of wave frequency spectra for all points of interest. To produce maps of wave power density, it computed a sum of the power density associated with all spectral components at a given location, regardless of wave direction. , power density) impinging on a cylinder of unit diameter that extends over the entire water column. The total theoretical resource was then computed by summation of these cylinders along an entire line of interest (such as a 50 m depth contour or a 50 nmi line).

This ad hoc approach prescribes such an array using a capacity packing density, specified as 10 kW, 15 kW, and 20 kW per meter. The capacity packing density is defined as “the maximum extractable power by the array of devices,” similar in concept to the rated power (maximum extractable power by a single device). The range of values chosen is based on characteristics of the Pelamis (Pelamis Wave Power) and Powerbuoy (Ocean Power Technologies) extraction devices. Their results indicate that 29-93 percent of the theoretical resource could be captured.

Energy needs based on the theoretical resource alone would be inappropriate. S. electricity consumption (EIA, 2012). While national-scale resource assessments may be useful for identifying geographic regions of interest for a particular MHK extraction technology, the practical resource will depend on a host of technical and environmental factors and may be significantly lower than what the assessments indicate is regionally or locally available. html). It is not possible to predict the practical MHK resource from national resource assessments until the constraints posed by both the technical extraction filters and the practical socioeconomic and environmental filters are better quantified for each of the specific resources.

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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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