Entransy and entropy analyses of heat pump systems

作     者：CHENG XueTao LIANG XinGang 

作者机构：Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua University 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2013年第58卷第36期

页      面：4696-4702页

核心收录：

学科分类：080705[工学-制冷及低温工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China(51376101) the Tsinghua University Initiative Scientific Research Program 

主　　题：热泵系统 最小熵产生原理 熵分析 低温热源 输入功率 高温热源 热流量 等效温度 

摘      要：In this paper,heat pump systems are analyzed with entransy increase and entropy *** extremum entransy increase principle is *** the equivalent temperatures of the high and low temperature heat sources are fixed,the theoretical analyses and numerical results both show that the maximum COP leads to the maximum entransy increase rate for fixed input power,while it leads to the minimum entransy increase rate for fixed heat flow absorbed from the low temperature heat *** minimum entropy generation principle shows that the minimum entropy generation rate always leads to the maximum COP for fixed input power or fixed heat flow absorbed from the low temperature heat source when the equivalent thermodynamic forces of the high and low temperature heat sources are *** discussions show that only the entransy increase rate always increases with increasing heat flow rate into the high temperature heat source for the discussed cases.