化工学报 ›› 2012, Vol. 63 ›› Issue (4): 1004-1010.DOI: 10.3969/j.issn.0438-1157.2012.04.002

• 流体力学与传递现象 • 上一篇    下一篇

采用SrCl2-NH4Cl-NH3工质对的二级吸附式冷冻循环性能

罗伟莉,王健,王丽伟,江龙,金哲权,王如竹   

  1. 上海交通大学制冷与低温工程研究所,上海 200240
  • 收稿日期:2011-07-18 修回日期:2012-01-06 出版日期:2012-04-05 发布日期:2012-04-05
  • 通讯作者: 王丽伟

Performance of two-stage adsorption freezing cycle with SrCl2-NH4Cl-NH3

LUO Weili,WANG Jian,WANG Liwei,JIANG Long,JIN Zhequan,WANG Ruzhu   

  1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai  200240, China
  • Received:2011-07-18 Revised:2012-01-06 Online:2012-04-05 Published:2012-04-05

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160 W·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。

关键词: 吸附式制冷, 二级吸附, 低温热源, 制冷性能

Abstract: 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 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℃ when the temperature of the heat source is 70℃.The adsorption quantity of strontium chloride is 94% 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 CaCl2-BaCl2-NH3 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..

Key words: adsorption refrigeration, two-stage adsorption, low-temperature heat source, refrigeration performance