混合制冷剂气体水合物生成及融解过程实验研究

1引言城市建筑物中，空调作为最大用电设备之一，夏季占建筑物耗电总量的一半以上，为了缓解高峰用电负荷并有效利用低谷电力，解决峰期用电紧张的矛盾，达到总体节能的目的，空调蓄冷移峰节电技术被认为是实现城市供电平衡和建筑节能的重要手段。作为实用的空调蓄冷技术，最为重要的是其蓄冷材料的相变温度与空调工况相适应，即在5～12℃发生相变，且相变潜热大，传热性能好．氟里昂气体水合物作为蓄冷材料，具有适合空调储冷的理想性质，可使水在8～12℃水合结晶，形成暖冰时释放反应热，其反应热与结冰潜热相当1]。然而，由于一些氟里昂…

EXPERIMENTS ON MIXED REFRIGERANT GAS HYDRATE FORMATION AND DECOMPOSITON

In this study, the formation and decomposition of the simple and mixed gas hydrates of CFC alternatives HFC134a, HFC152a and HCFC141b as well as their mixtures were tested with an enclosed cell, which was cooled within a low-temperature water bath. The results show that the formation temperature, pressure and speed of mixed gas hydrates are much better than those of simple gas hydrates. This means that one can get a phase-change cool-storage material which has superior thermodynamic and kinetic properties by using mixed gas hydrate formed by high-and low-pressure (active and inactive) refrigerant blends. HFC134a/HCFC141b and HFC152a/HCFC141b mixed gas hydrates has been found to be good cool storage materials which can be formed and decomposed at moderate pressure and appropriate temperature.