Entransy Analysis of Irreversible Heat Pump Using Newton and Dulong-Petit Heat Transfer Laws and Relations with its Performance

Abstract

An irreversible heat pump was investigated via entransy analysis and performance criteria. In theanalyses, two different convective heat transfer laws were applied to the considered system: the Newtonand Dulong–Petit heat transfer laws. The irreversibilities in the system are the result of a finite heat trans-fer rate, a heat leak and internal irreversibilities, including friction, turbulence etc. In this study, a ther-modynamic analysis was performed in detail, and the numerical solutions were used for the conductedanalysis. The maximum entransy dissipation (critical points) ranges from 18436.7 kW K to 18855.3 kW Kaccording toyfor Newton’s law; however, there is no maximum point for the Dulon–Petit law. It can beconcluded from this study that entransy should be used among the basic thermodynamic criteria.