回热无泵氨-水吸收式制冷系统的设计分析  

Performance Characteristics of Heat-Regenerative NH_3-H_2O Absorption Refrigeration System without Solution Pump and Distillation Equipment

作　　者：王晶[1] 吴裕远[1] 吴铁晖[1] 何树青[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《上海交通大学学报》2009年第2期314-317,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50776064)

摘　　要：为了充分利用无泵氨-水系统中稀溶液的余热,在系统内串联一个相同的发生容器,并在各发生容器内增设溶液热交换器.利用建模程序,对系统在不同工况下进行模拟计算,分析了外部参数变化对于循环性能的影响,并与改进前的系统进行比较.研究结果表明:当溶液循环率λ=1时,回热系统的制冷性能系数(COP)可达0.295,比原循环的值提高了82.1%;增大λ值,可大大减少所需预热负荷和预冷负荷,从而较为明显地提高系统COP,改善系统制冷连续性,且λ越大,回热系统的优势越明显.初步探讨了回热系统采用二元工质的性能和参数影响,为后续三元工质的应用研究提供必要的指导.A novel heat-regenerative NH3-H2O absorption refrigeration system without solution pump and distillation equipment was proposed, in order to make full use of residual waste heat of weak solution. Some improvements were made for existing system, by adding a generator and three solution heat exchangers into each generator. The results indicate that the coefficient of performance （COP） could be up to 0. 295, with the new defined parameter-solution circulation coefficient （λ） is set to 1, which is 82.1 more than that of the original cycle. When λ increases, both the warm-up heat load and the required forecooling load could be reduced significantly, which leads to enhance COP evidently and improve the refrigeration continuity of the system. The higher the solution recycle ratio of λ, the more advantages of the heatregenerative system.

关 键 词：吸收式制冷 制冷系统 回热 溶液循环率 预热负荷 预冷负荷 

分 类 号：TB61[一般工业技术—制冷工程]