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°C.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 SrCl2-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°C when the temperature of the heat source is 70°C . The adsorption quantity of strontium chloride is 94% of the theoretical value. Under the condition of 80°C heat source, 25°C cooling source, and - 25°C 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 CaCl2-RaCl2-NH3 with the heat source temperature of 85°C , the heat source temperature in this study decreases 5°C , and COP and SCP increase by 4% and 10% , respectively.
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