The second law of thermodynamics has been applied to evaluate the performance of surfaces encountered in compact heat exchangers. The entropy production of compact heat transfer surfaces has been calculated and scaled by that evaluated for a reference surface, under given constraints. The measure of the performance of a given surface has been expressed as a function of one single operational parameter which condenses the effects of the assigned requirements (mass flow rate, or pressure drop or pumping power alternatively fixed). Some examples are given for different types of plate-fin surface configurations, though in principle the criterion is applicable to other families of heat transfer surfaces.
The irreversibility minimization criterion applied to compact heat exchanger passages
TAGLIAFICO, LUCA ANTONIO;TANDA, GIOVANNI
1997-01-01
Abstract
The second law of thermodynamics has been applied to evaluate the performance of surfaces encountered in compact heat exchangers. The entropy production of compact heat transfer surfaces has been calculated and scaled by that evaluated for a reference surface, under given constraints. The measure of the performance of a given surface has been expressed as a function of one single operational parameter which condenses the effects of the assigned requirements (mass flow rate, or pressure drop or pumping power alternatively fixed). Some examples are given for different types of plate-fin surface configurations, though in principle the criterion is applicable to other families of heat transfer surfaces.
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