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℃, thus the cooling capacity was obtained by measuring the mass of the ice transformed from water and was calculated as 475 kJ·kg^-1 of NH4Cl salt during 3 hours’ operation, however, the effective cooling production accounted for 25%—42%.The average specific cooling power was 43 W·kg^-1 of NH₄Cl salt.This device achieved two refrigeration temperature levels: -1—6℃ and -16—14.5℃ respectively for two relative independent zoons 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.

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，利用氯化铵配合物的解吸热来产生制冷效果。通过实验测量在20～35℃室温下3h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^-1，平均制冷功率（SCP）约为43 W·kg^-1，并且其可同时实现-1～6℃冷藏和-16<