Download e-book for iPad: 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

ISBN-10: 0309269997

ISBN-13: 9780309269995

Expanding renewable power improvement, either in the usa and in another country, 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 iteration 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 almost 0 a decade in the past. notwithstanding, almost all these allows are for advancements alongside the Mississippi River, and the particular gain learned from all MHK assets is intensely small. the 1st U.S. advertisement gridconnected undertaking, a tidal venture in Maine with a ability of lower than 1 megawatt (MW), is presently offering a fragment of that energy to the grid and is because of be totally put in in 2013.

As a part of its review of MHK assets, DOE requested the nationwide learn Council (NRC) to supply special reviews. In reaction, the NRC shaped the Committee on Marine Hydrokinetic strength expertise overview. As directed in its assertion of job (SOT), the committee first constructed an period in-between document, published in June 2011, which thinking about the wave and tidal source tests (Appendix B). the present document includes the committee's evaluate of all 5 of the DOE source different types in addition to the committee's reviews at the total MHK source overview method. This precis specializes in the committee's overarching findings and conclusions relating to 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 evaluate, extra dialogue of the sensible MHK source base, and overarching conclusions and proposals are defined in An overview 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

During presentations from DOE and the assessment groups and ensuing discussion with the committee, it became clear that each group offers a different interpretation of what types of constraints would need to be included among its extraction filters. However, it is clear to the committee that estimating the technical resource from the theoretical resource requires filters that represent the general physical and technological constraints associated with energy-extraction devices. In-water or field tests would assist in the quantification of realistic extraction filters and/or device-specific conversion efficiencies, because the data obtained could be used to calibrate numerical models.

Validation and display of wave energy resource estimates,” Presentation to the committee on February 8, 2010. 3-4 Copyright © National Academy of Sciences. All rights reserved. S. , 2004). By applying constraints including MOC and TOC as well as the observed temporal variability, an estimated recoverable technical power of 30 percent of the theoretical power was obtained. This is of an order of magnitude comparable to the group’s assessment for a minimal packing density. The committee agrees that the method provides a convenient correct bulk number of the recoverable power at an individual site but would like to strongly reiterate that (1) the method is a rough estimation and is therefore inaccurate and (2) the method does not represent the technically recoverable resource.

The effect of tidal flats was initially evaluated but not considered in the final model setup and runs. The tidal resource assessment group calibrated the tidal models by adjusting the single friction coefficient to improve the comparison among model results, NOAA predictions of tidal elevation and currents, and limited observations of depth-averaged tidal currents. Model calibration parameters include harmonic constituents for tidal currents and water levels, maximum/minimum tidal currents, and high/low tides.

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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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