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Entransy Dissipation Analysis for Optimal Design of Heat Exchangers

Kyoung Hoon Kim and Se Woong Kim
Kumoh National Institute of Technology/Department of Mechanical Engineering, Daehakro 61, Gumi, Gyeongbuk 730-701, Korea
Abstract—Recently the entransy has been introduced as a physical quantity to describe the heat transfer ability of an object. The optimization of heat exchangers is an important issue, and the principle of minimum entropy generation is sometimes used for optimal design of heat exchangers. In this work performance analysis based on the entransy dissipation-based thermal resistance is carried out for optimal design of heat exchangers with parallel or counter flow. Parametric analyses of heat transfer rate, entropy generation and entransy dissipation with the key parameters of hot-stream inlet temperature, thermal conductance and heat capacity rate are also presented for comparison. Results show that the minimum entropy generation or the entransy dissipation does not represent the optimum performance for a counter-flow heat exchanger while the minimum entransy dissipation-based thermal resistance corresponds to the maximum heat transfer rate. It is found that the behavior of entropy generation is very similar to that of entransy dissipation.

Index Terms—heat exchanger, entransy dissipation, entropy generation, entransy dissipation-based thermal resistance (EDTR)

Cite: Kyoung Hoon Kim and Se Woong Kim, "Entransy Dissipation Analysis for Optimal Design of Heat Exchangers," Jounal of Automation and Control Engineering, Vol. 3, No. 2, pp. 87-91, April, 2015. doi: 10.12720/joace.3.2.87-91
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