A proposed method for generating electricity from solar irradiation is to concentrate the irradiation into a cavity

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A proposed method for generating electricity from solar irradiation is to concentrate the irradiation into a cavity that is placed within a large container of a salt with a high melting temperature. If all heat losses are neglected, part of the solar irradiation entering the cavity is used to melt the salt while the remainder is used to power a Rankine cycle. (The salt is melted during the day and is resolidified at night in order to generate electricity around the clock.)

Consider conditions for which the solar power entering  the cavity is qsol = 7.50 MW and the time rate of  change of energy stored in the salt is Est =3.45 MW.  For a cavity opening of diameter Ds = 1 m, determine  the heat transfer to the Rankine cycle, qR. The temperature  of the salt is maintained at its melting point,  Tsalt = T= 1000°C. Neglect heat loss by convection  and irradiation from the surroundings.

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Fundamentals Of Heat And Mass Transfer

ISBN: 9780470501979

7th Edition

Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt

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