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RESEARCH PAPERS

Heat Transfer in Liquid-Coupled Indirect Heat Exchanger Systems

[+] Author and Article Information
R. B. Holmberg

AB Svenska Fläktfabriken, Jönköping, Sweden

J. Heat Transfer 97(4), 499-503 (Nov 01, 1975) (5 pages) doi:10.1115/1.3450418 History: Received March 20, 1975; Online August 11, 2010

Abstract

The theory of liquid-coupled indirect heat exchanger systems has been studied to ascertain optimum criteria with respect to the coupling-liquid flow rate and the distribution of total heat transfer area between the hot-side and cold-side exchanger units in the case of counterflow arrangement. The optimum coupling-liquid capacity rate is derived and given as a function of the over-all capacity rate ratio and the Ntu ratio between the two exchanger units. For this optimum liquid capacity rate together with the proposed over-all number of transfer units, it is shown that the over-all heat transfer effectiveness of the liquid-coupled system can be expressed in the ordinary form for individual exchanger units in true counterflow.

Copyright © 1975 by ASME
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