采用SrCl_2-NH_4Cl-NH_3工质对的二级吸附式冷冻循环性能  

Performance of two-stage adsorption freezing cycle with SrCl_2-NH_4Cl-NH_3

作　　者：罗伟莉[1] 王健[1] 王丽伟[1] 江龙[1] 金哲权[1] 王如竹[1] 

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240

出　　处：《化工学报》2012年第4期1004-1010,共7页CIESC Journal

基　　金：国家自然科学基金项目(50806043)~~

摘　　要：吸附式制冷是一种绿色环保节能的制冷技术,在低于100℃的低品位热能如废热能、太阳能等的利用方面具有广阔的发展前景。为了能够利用这部分的能源,提出了由吸附制冷过程与再吸附过程组成的二级吸附式制冷循环。采用SrCl2-NH4Cl-NH3作为工质对,测试不同蒸发温度与冷却温度下吸附剂的吸附与解吸性能。实验测试结果表明:当热源温度为70℃时,二级吸附式制冷也能够实现-25℃下的冷量输出。在测试工况下,氯化锶的最大吸附量达到了理论吸附量的94%。80℃热源、25℃冷源以及-25℃制冷条件下二级吸附式制冷循环的COP和SCP达到了0.250与160W.kg-1。这个数值与CaCl2-BaCl2-NH3两级冷冻在85℃驱动热源以及同等的冷源与制冷温度条件下的数据相对比,驱动热源需求降低了5℃,COP提高了4%,SCP提高了10%以上。Adsorption refrigeration is an environmental benign and energy saving refrigeration technology and has a great potential for the utilization of low-grade energy, such as solar energy and industrial waste heat below 100℃. For efficient utilization of these low-temperature heat sources, a two-stage adsorption refrigeration cycle was proposed based on the adsorption refrigeration process and resorption process. Refrigeration performance of the working pair of SrC12-NH4Cl-NH3 was tested at different evaporating and condensing temperatures. The results show that the two-stage adsorption refrigeration cycle can give the cooling output with the temperature of -25℃ when the temperature of the heat source is 70℃. The adsorption quantity of strontium chloride is 940/oo of the theoretical value. Under the condition of 80℃ heat source, 25℃ cooling source, and -25℃ refrigerating temperature, the COP and SCP are 0. 250 and 160 W＂ kg-1, respectively. At the same cooling and refrigerating temperatures, compared with the working pair of CaC12-BaC12-NHa with the heat source temperature of 85℃, the heat source temperature in this study decreases 5℃ , and COP and SCP increase by 4% and 10%, respectively.

关 键 词：吸附式制冷 二级吸附 低温热源 制冷性能 

分 类 号：TB611[一般工业技术—制冷工程] TK511.3[动力工程及工程热物理—热能工程]