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RESEARCH PAPERS

Generalized Analytical Equation for the Top Heat Loss Factor of a Flat-Plate Solar Collector With N Glass Covers

[+] Author and Article Information
S. K. Samdarshi, S. C. Mullick

Centre for Energy Studies, Indian Institute of Technology, New Delhi 110 016, India

J. Sol. Energy Eng 116(1), 43-46 (Feb 01, 1994) (4 pages) doi:10.1115/1.2930064 History: Received January 01, 1992; Revised August 01, 1993; Online June 06, 2008

Abstract

A generalized analytical equation for the top heat loss factor of a flat-plate collector with one or more glass covers has been developed. The maximum computational errors resulting from the use of the analytical equation with several simplifications are ± 5 percent compared to numerical solution of the set of heat balance equations. The analytical equation is considerably more accurate than the available semi-empirical equations over the entire range of variables covered. An additional advantage of the proposed technique over the semi-empirical equations is that results can be obtained for different values of sky temperature, using any given correlation for convective heat transfer in the air gap spacings, and for any given values of fluid (air in the present case) properties.

Copyright © 1994 by The American Society of Mechanical Engineers
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