Abstract

Kraus and Kern derived for heat exchangers a relationship between the temperature effectiveness of the tube side stream,the number of heat transfer units based on the tube-side heat capacity rate and the heat capacity ratio of the tube to the shell. This paper is aimed at further simplification of the Kraus-Kern formula and provides analytical proof for a limiting process for the effectiveness of heat exchangers that was intuitively considered in various texts but whose analytical proof was not available in the literature.

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