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用常压物理浸渍法制备了相变储能石膏板。采用SEM、DSC等测试手段对储能墙板的微孔形貌、热性能特征进行了测试。同时还测试了相变储能石膏板的储热调温性能和相变循环耐久性。结果表明:脂肪酸相变材料被有效吸附于石膏板的微孔结构中;储能石膏板的相变温度适宜,相变潜热与理论潜热值相当;相变材料容留量小于22%时,储能石膏板的渗出稳定性良好;热性能测试结果表明,相变储能石膏板的控温性能良好,能够实现热量在时间和空间上的转移,有效降低温度波动;250次固-液相变循环后,质量损失率仅为2.5%。
Phase change energy storage gypsum board was prepared by atmospheric pressure impregnation method. The micropore morphology and thermal characteristics of the energy storage wallboard were tested by means of SEM and DSC. At the same time, the phase change energy storage gypsum board thermal storage temperature control performance and phase change cycle durability. The results show that the fatty acid phase change material is effectively adsorbed in the micropore structure of the gypsum board. The phase transition temperature of the gypsum board is suitable, and the latent heat of phase transition is equivalent to the theoretical latent heat value. When the content of the phase change material is less than 22% Gypsum board exudation stability is good; thermal performance test results show that phase change gypsum board temperature control performance is good, can achieve the transfer of heat in space and time, effectively reducing temperature fluctuations; 250 solid-liquid phase transition After cycling, the mass loss rate is only 2.5%.