William H. Avery's Renewable Energy From the Ocean: A Guide to OTEC (Johns PDF

By William H. Avery

Scientists and engineers all over the world are striving to enhance new assets of strength. One resource, ocean thermal power conversion, has nearly limitless strength. it truly is in response to options that take advantage of warmth produced through solar power which may, in flip, be used to provide gas and electrical energy. This e-book studies the prestige and history of this promising know-how. William H. Avery is the major specialist during this box, and his co-author Chih Wu is an expert on warmth engine functionality. jointly they describe the workings of an OTEC energy plant and the way one of these method will be applied as a part of a futuristic nationwide strength process. The publication is the one distinct presentation of uncomplicated OTEC expertise, its checking out and development. it truly is in accordance with huge improvement tasks undertaken the world over throughout the interval from 1974 via 1985. The e-book bargains an intensive review of the economics of OTEC compared to different power creation tools. will probably be of curiosity to a variety of pros in power examine, strength and mechanical engineering, and to upper-level undergraduate scholars taking classes in those fields.

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Extra info for Renewable Energy From the Ocean: A Guide to OTEC (Johns Hopkins University Applied Laboratory Series in Science and Engineering)

Example text

7) to assess the relative importance of the terms on the right-hand side of the equation. From this assessment, one can estimate the effect of changes in the coefficients that could result from design improvements, changes in operating conditions, or degraded heat transfer due to biofouling or scaling. 0005) = titanium = aluminum (numerical subscripts are alloy designations). 000278 = 3600 W/m2 °C (630 Btu/ft2 h °F). Substitution of more optimistic or more pessimistic values in the formula leads to the changes in performance shown in Table 1-1.

Electricity-generating capacity in 1987 was 165 thousand MWe. 2 DESIGN REQUIREMENTS FOR OTEC SYSTEMS The OTEC power plant uses the heat in the surface water of the tropical oceans to generate electricity for on-land facilities or for ship-mounted plants that produce fuels or other products. The major subsystems of an OTEC system, shown schematically in Fig. 1-2, are: 1. A heat engine or power plant, including heat exchangers, turbines, electric generator, water and working-fluid pumps, and associated piping and controls ; 2.

The diameter of the CWP selected for a given power plant output results from a trade-off between CWP cost (roughl proportional to diameter, wall thickness, and length) and pumping power to overcome flow drag, which increases with the cube of the water velocity in the CWP. The allowable angle between the CWP and platform is determined by the ship and platform motions projected to occur under 100-year-storm conditions at the selected operating site. 2. Short discussions of the remaining factors involved in CWP design will be presented here.

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