技术中心

摘 要： 为了解决能源在时空上的供需矛盾，提高能源利用率，采用新型化学吸附制冷技术设计了一个由低品位热源驱动的蓄冷装置。该装置以MnCl2和NH4Cl的复合固化吸附剂作为工质对，利用氯化铵络合物的解吸热来产生制冷效果。通过实验测量在20 ~ 35oC室温下3个小时内的制冰量，得到该装置单位质量氯化铵的总制冷量，约为475 kJ/kg，平均SCP约为43 W/kg，并且其可同时实现-1 ~ 6oC冷藏和-16 ~ -14.5oC冷冻的两个功能，有效制冷量占总制冷量的25 ~ 42%，减小金属热容，加强系统的传热传质性能以及装置保温性能，是系统优化设计的重点。 关键词 ：吸附 蓄冷 氯化锰 氯化铵 解吸热 冷藏运输 Chemisorption Cold Storage System Powered by Low Grade Thermal Energy Bao Huashan, Wang Ruzhu, Wang Liwei Institute of refrigeration and Cryogenic, Shanghai Jiao Tong University, 200240 Abstract: In order to balance the supply and demand of energy spatially and temporally, and to enhance efficiency of energy utilization, this work presents a novel chemisorption cold storage device driven by low grade thermal energy. This device employed MnCl2/NH4Cl as working pair, which were individually mixed with expanded graphite as compound sorbents, and ammonia as refrigerant. Experiments were conducted under different ambient temperature ranging from 20 to 35 oC, thus the cooling capacity was obtained by measuring the mass amount of the ice transformed from water and was calculated as 475 kJ per kg of NH4Cl salt during 3 hours operation, however, the effective cooling production accounted for 25―42%.The average specific cooling power was 42 W per kg of NH4Cl salt. This device achieved two refrigeration temperature levels: -1―6 oC and -16―-14.5 oC respectively for two relative independent zooms inside the device. Reducing the metallic components, enhancing the transfer properties and insulation performance of the device are the key subjects of further optimization work.