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针对100℃以下温度低品位热能的利用,提出二级吸附式制冷循环,建立吸附性能测试实验台。分别以氯化钙与氯化钡作中温盐与低温盐,测试当冷却温度为30℃时,不同热源温度与不同蒸发温度条件下吸附剂的循环吸附量,并在此基础上,分析二级吸附式制冷系统的性能。研究表明,二级吸附式制冷循环能够满足全年冷冻工况的应用,并且当热源温度、冷却温度及蒸发温度分别为80℃、30℃及-20℃时,氯化钙的循环吸附量、二级吸附式制冷系统的COP与SCP分别为0.490 kg/kg,0.24与85.6 W/kg。
Aiming at the utilization of low-grade thermal energy below 100 ℃, a two-stage adsorption refrigeration cycle is proposed and an adsorption performance test bench is established. Calcium chloride and barium chloride were used as mesothermal salts and cryogenic salts, respectively. When the cooling temperature was 30 ℃, the adsorption capacity of adsorbent under different heat source temperature and different evaporation temperature was tested. Based on this analysis, Adsorption refrigeration system performance. The results show that the two-stage adsorption refrigeration cycle can meet the application of annual refrigeration conditions, and when the heat source temperature, cooling temperature and evaporation temperature were 80 ℃, 30 ℃ and -20 ℃, respectively, The COP and SCP of the two-stage adsorption refrigeration system were 0.490 kg / kg, 0.24 and 85.6 W / kg, respectively.