吸收式热泵等效循环模型及性能优化  

THERMODYNAMICS MODEL AND PERFORMANCE OPTIMIZATION OF ABSORPTION HEAT PUMP

作　　者：赵玺灵[1] 付林[1] 张世钢[2] 

机构地区：[1]清华大学建筑技术科学系,北京100084 [2]北京科技大学建筑环境与设备工程系,北京100083

出　　处：《太阳能学报》2010年第9期1173-1179,共7页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展计划(863)项目(2006AA05Z252);中国博士后科学基金项目(20080430432)

摘　　要：应用有限时间热力学理论对吸收式热泵进行研究,将其等效为一个由不可逆卡诺热机驱动的不可逆卡诺热泵的联合循环系统,考虑了热阻及工质内部的不可逆性,建立了四热源吸收式热力循环模型,得出吸收式热泵的性能界限及取得性能界限的途径;并得出了吸收式热泵热力循环各个关键参数的通用优化关系,结果表明:两个等效循环的不可逆程度对系统最优性能的影响不同,在设计机组时,减小等效热泵循环的摩擦、热损失、内部耗散比减小等效热机循环之间的相应损失更能显著提高机组的性能;并指出吸收器与冷凝器的热分配率是热力循环优化的结果,指出以往研究者将热分配率定义为一个独立变量而得到的分析结果均不具有普遍适用性。The absorption heat pump was studied with finite time thermodynamics. A four reservoirs model of absorption heat pump which is treated as an irreversible Carnot heat pump driven by an irreversible Carnot heat engine was lished considering the heat resistance and the irreversibility of the internal cycle. The main performance limits and the approach of how to get it were deduced, and a generalized optimization relationship between the main parameters and the corresponding conditions were derived. It is show that, two internal irreversibility parameters, the heat engine cycle and the heat pump eyele has different effects on system performance, and the reduction of the friction, heat loss, and internal dissipations of the equivalent heat pump cycle are more important than its reduction of heat engine cycle. It is indicated that, the heating load of absorber and condenser should be the results by system optimization, and it is not correct to introduce a parameter as the heat allocation ratio of absorber and condenser, and also it is not correct to define the ratio as a definite valve.

关 键 词：有限时间热力学 吸收式热泵 热力循环 性能极限 

分 类 号：TK651[动力工程及工程热物理—生物能]