Entropy generation and unified optimizacion of Carnot-like and low-dissipation refrigerators

Abstract

[EN]The connection between Carnot-like and low-dissipation refrigerators is proposed by means of their entropy generation and the optimization of two uni ed, compromise-based gures of merit. Their optimization shows that only a limited set of heat transfer laws in the Carnot-like model are compatible with the results stemming from the low-dissipation approximation, even though there is an agreement of the related physical spaces of variables. A comparison between two operation regimes and relations among entropy generation, e ciency, cooling-power and power-input are ob- tained, with emphasis on the role of dissipation symmetries. The results extend previous ndings for heat engines at maximum power conditions.