Exergy analysis on a heat pump working between a heat sink and a heat source of finite heat capacity rate

被引：25
作者：
Pitarch, Miguel [1 ]
Hervas-Blasco, Estefania [1 ]
Navarro-Peris, Emilio [1 ]
Corberan, Jose M. [1 ]
机构：
[1] Univ Politecn Valencia, Inst Univ Invest Engn Energet, Cami de Vera S-N, E-46022 Valencia, Spain
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID | 2019年 / 99卷
关键词：
Exergy; Heat pump; Optimal working point; Subcooling; Superheat; OPTIMIZATION; PERFORMANCE; SYSTEMS; CYCLE; CONDENSER; PRESSURE; DESIGN;
D O I：
10.1016/j.ijrefrig.2018.11.044
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The optimum performance of a pure subcritical refrigeration cycle depends significantly on the temperature lift of the heat source and sink. Therefore, the maximization of the system efficiency has to be linked to them. This paper shows an exergy analysis of each heat pump component (condenser, evaporator, expansion valve and compressor) considering that the heat source and sink are not at constant temperature. The performed study shows the components with more possibilities for improvement. Based on this analysis, the optimization of cycle parameters like subcooling and superheat as a function of the external conditions have been done. In addition, this work has demonstrated that the components having a higher influence in the system irreversibility's depends significantly on the temperature lift of the secondary fluids. Finally, the obtained results show potentials improvements of the efficiency up to 23% if the system is able to operate in the optimal subcooling and superheat. (C) 2018 Elsevier Ltd and IIR. All rights reserved.
引用
收藏
页码：337 / 350
页数：14
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