传热规律、热漏和内不可逆性对吸收式热泵循环性能的影响  

Effects of heat transfer law,heat leak and internal irreversibilities on performance of absorption heat pump

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,湖北武汉430033

出　　处：《热科学与技术》2005年第2期150-156,共7页Journal of Thermal Science and Technology

基　　金：全国优秀博士学位论文作者专项资金资助项目 (2 0 0 13 6);国家重点基础发展规划资助项目 (G2 0 0 0 2 63 0 1);海军工程大学科研基金项目 (H GDJJ0 40 18)

摘　　要：建立了考虑泵热空间到环境热源的热漏、工质循环的内部不可逆性以及工质与热源之间传热Q∝Δ(Tn )服从传热规律时的不可逆四热源吸收式热泵循环模型,导出了循环泵热率和泵热系数的一般关系;并导出了线性唯象传热定律时循环泵热率和泵热系数的基本优化关系、性能极值、循环中工质的最佳工作温度和换热器传热面积的最佳分配关系;通过数值算例分析了传热规律、热漏和内不可逆性对循环性能的影响规律,比较了传热面积最优分配前后循环的最优性能。An irreversible model of the four-heat-reservoir absorption heat pump cycle was established, taking account in the heat leak, internal irreversibilities and the heat transfer between the working substance and the heat reservoirs with heat transfer law of. The general relation between the heating load and the COP (coefficient of performance) with was deduced. The fundamental optimal relation between the heating load and the thermal coefficiency, the maximum COP, the optimal temperatures of working substance, as well as the optimal heat transfer surface areas distribution were derived with linear phenomenological heat transfer law. Effects of heat transfer, heat leak and internal irreversibilities on the performance of the absorption heat pumps was analyzed. Numerical examples were presented to compare the performance with or without the optimal distribution of the total heat transfer surface area.

关 键 词：吸收式热泵 内不可逆性 传热规律 循环性能 热漏 基本优化关系 最佳工作温度 泵热系数 传热面积 循环模型 分配关系 影响规律 最优性能 最优分配 泵热率 热源 工质 换热器 

分 类 号：TK172[动力工程及工程热物理—热能工程] TK1