不可逆吸收式热泵循环的基本优化关系及性能分析  

THE FUNDAMENTAL OPTIMAL RELATION OF AN IRREVERSIBLE ABSORPTION HEAT PUMP AND ITS PERFORMANCE ANALYSIS

作　　者：秦晓勇[1] 陈林根[1] 孙丰瑞[1] 

机构地区：[1]海军工程大学动力工程系,武汉430033

出　　处：《太阳能学报》2005年第1期73-81,共9页Acta Energiae Solaris Sinica

基　　金：全国优秀博士学位论文作者专项资金(200136)国家重点基础发展规划资助项目(973)项目(G200026301)

摘　　要：在恒温热源内可逆四热源吸收式热泵循环的基础上,建立了线性(牛顿)传热定律下考虑泵热空间到环境热源的热漏、工质的内部耗散以及工质与外部热源间的热阻损失的不可逆吸收式热泵循环模型。导出了总换热面积一定的条件下循环的泵热率和泵热系数的基本优化关系、最大泵热率和相应的泵热系数、最大泵热系数和相应的泵热率、以及循环中最佳工质工作温度和最佳换热面积分配关系;并通过数值算例分析了循环参数对循环最优性能的影响规律。On the basis of an endoreversible absorption heat pump cycle, an irreversible four-heat-reservoir cycle model has been built by taking account the heat resistance, heat leak and irreversibilities due to the internal dissipa- tion of the working fluid. The heat transfer between the heat reservoirs and the working substance is assumed to obey linear (Newtonian) heat transfer law, and the overall heat transfer surface area of the four heat exchangers is assumed to constant. The fundamental optimal relation between the coefficient of performance and the heating load, the maxi- mum coefficient of performance and the corresponding heating load, the maximum heating load and the corresponding coefficient of performance, as well as the optimal temperatures of the working substance and the optimal distribution of the heat-transfer surface areas of the cycle are derived by using finite-time thermodynamics. Moreover, the effects of the cycle parameters on the characteristics of the cycle have been studied by detailed numerical examples.

关 键 词：有限时间热力学 吸收式热泵循环热阻 热漏 内不可逆性 

分 类 号：TK519[动力工程及工程热物理—热能工程]