The phase change materials in walls can significantly improve the insulation and heat storage capacity of the wall,but the thickness and location of phase change material layer need to be determined by scientific research.Based on the meteorological characteristics of cold area,the phase change energy storage materials are selected which is suitable for the exterior walls of buildings in cold area.From the point of view of the heat transfer characteristics of the walls,the thermal characteristics of the phase change wall under various conditions are studied by establishing the model of phase change wall with different thickness and different positions.The results show that the thermal insulation and heat storage capacity of the phase change wall in winter is affected by the location and thickness of the phase change material layer,and the effect in summer is mainly affected by the thickness.The intermediate phase change wall with a thickness of 40 mm and the inner phase change wall with a thickness of 60 mm are more suitable for architectural applications in cold areas.The results can provide reference for structural design optimization of phase change wall in cold area.
cold regionphase change material(PCM)heat transfer processinfluencing factorsthermal properties