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

AÇIKKALP E.

Energy Conversion and Management, vol.86, pp.792-800, 2014 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 86
  • Publication Date: 2014
  • Doi Number: 10.1016/j.enconman.2014.06.029
  • Journal Name: Energy Conversion and Management
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.792-800
  • Keywords: COP, Entransy analysis, Entransy dissipation, Entransy efficiency, Entropy generation, Exergy efficiency, Irreversible heat pump
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

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. © 2014 Elsevier Ltd. All rights reserved.