Abstract
Abstract A comparison is made of the heat rejection burden resulting from the use of fossil fuel, nuclear, geothermal and solar energy sources for power production. Heat rejection, an inevitable consequence of the second law of thermodynamics, can be viewed on a comparative basis in terms of a ratio of heat rejected (QE) to useful work (W) or QR/W. For a fossil fuel plant with no stack losses, this ratio is on the order of 1.7 arid increases to about 2,2 for (he nuclear plant. Depending upon the power cycle configuration, the Qr/W ratio for the solar and geothermal sources can be on a par or 2.5 times that of the conventional plant respectively. Reject-heat, if properly utilized, provides a source of energy. Consideration is given to the potential role of useful aspect systems in reject dispersal. In particular, the feasibility of year-round operation of an evaporative pad agricultural greenhouse complex is demonstrated in consort with optimum power plant performance.
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