Combining the building envelope with phase change materials is considered as one of the effective techniques to reduce the energy consumption of building operation.In order to solve the drawback that static energy storage wall cannot improve the rate of cold release and cold storage at the same time,this paper proposes a pneumatic embedded tube type dynamic phase change wall,and establishes and verifies its numerical model through experimental testing and using dynamic grid technology,and then compares the thermal performance of this model with static energy storage wall in terms of cold release and cold storage.The calculation results show that the average relative error between numerical simulation and experimental results is 1.72%for the inner surface temperature and 0.57%for the inner surface heat flow density;in terms of cold release,the liquefaction time of phase change material of pneumatic embedded tube wall is 81.8%higher and the inner surface heat flow density is 10.3%lower than that of PCM-O wall;in terms of cold storage,the curing time of phase change material of pneumatic embedded tube wall is 10.3%lower than that of PCM-I wall.The wall phase change material curing time is improved by 56.2%overall,and the decrease rate of heat flow density on the inner surface increaseds by 65.8%,which can significantly improve the efficiency of diurnal phase change material melting and solidification.
万方数据
维普
