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以自制定形相变材料(PCM)构件,与EPS板组成相变-保温复合结构,在升温-降温过程中,测试了该结构的温度-时间响应。结果表明:加入PCM构件与多层EPS板形成相变-保温复合结构后,系统热惰性显著提高。其中PCM在第2层或第3层位置时,较之标准实验结果,升温用时和降温用时分别延长了12倍和6倍,而在第4层时相变过程不够充分。从最内层的温度-时间响应看,PCM在第3层时蓄热保温效果最好,并以简化的等效热流图对此进行了分析。若将此定型相变材料制成板片状结构嵌入外墙保温材料内适当位置蓄热保温,可增强墙体热惰性,达到建筑节能目的。
The temperature-time response of the structure was tested during the process of temperature rise-temperature drop by using self-made phase change material (PCM) components and phase change-thermal insulation composite structure with EPS board. The results show that the thermal inertia of the system increases significantly after the phase change-thermal insulation composite structure is formed by adding the PCM member and the multi-layer EPS board. The PCM in the second or third layer location, compared with the results of the standard test, the heating time and cooling time were extended 12 times and 6 times, respectively, while in the fourth layer, the phase transition process is not sufficient. From the temperature-time response of the innermost layer, PCM has the best heat and heat preservation effect at the third layer, and the simplified equivalent heat flux diagram is used to analyze this effect. If the shape of the phase change material made of sheet-like structure embedded in the external wall insulation materials in place thermal insulation can enhance the wall thermal inertia, to achieve the purpose of building energy efficiency.