Entransy analysis of irreversible heat pump using Newton and Dulong-Petit heat transfer laws and relations with its performance

An irreversible heat pump was investigated via entransy analysis and performance criteria. In the analyses, two different convective heat transfer laws were applied to the considered system: the Newton and Dulong-Petit heat transfer laws. The irreversibilities in the system are the result of a finite heat transfer rate, a heat leak and internal irreversibilities, including friction, turbulence etc. In this study, a thermodynamic analysis was performed in detail, and the numerical solutions were used for the conducted analysis. The maximum entransy dissipation (critical points) ranges from 18436.7 kW K to 18855.3 kW K according to y for Newton's law; however, there is no maximum point for the Dulon-Petit law. It can be concluded from this study that entransy should be used among the basic thermodynamic criteria. (C) 2014 Elsevier Ltd. All rights reserved.