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RESEARCH PAPERS

A General Theory of Wet Surface Heat Exchangers and its Application to Regenerative Evaporative Cooling

[+] Author and Article Information
I. L. Maclaine-cross

Broken Hill Division, University of New South Wales, Broken Hill, N.S.W. 2880, Australia

P. J. Banks

Division of Mechanical Engineering, Commonwealth Scientific and Industrial Research Organization, Highett, Victoria 3190, Australia

J. Heat Transfer 103(3), 579-585 (Aug 01, 1981) (7 pages) doi:10.1115/1.3244505 History: Received October 07, 1980; Online October 20, 2009

Abstract

Wet surface heat exchangers such as cooling towers and wet plate heat exchangers are important in air conditioning. A linear approximate model of wet surface heat exchangers is proposed. The equations of the model are rearranged, enabling solutions for wet bulb depression and wet bulb temperature to be obtained independently, by analogy from published solutions for dry bulb temperature in dry surface heat exchangers. Performance predictions by this method for a crossflow cooling tower are found to agree with those from a prevous finite difference solution. Published performance measurements for a crossflow wet plate heat exchanger are lower than predicted by the method possibly due to poor wetting or excessive water flow. Excellent performance is predicted for a proposed regenerative evaporative cooler using such an exchanger.

Copyright © 1981 by ASME
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