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本文选用1种典型结构的混凝土空心砌块以及常用的相变材料(PCM),提出1种复合PCM空心砌块的制作方法,将PCM放入空心砌块内的不同厚度位置制成多种形式的复合砌块,采用变温热箱法对不含PCM及含有PCM的空心砌块墙体进行了多组不同温度条件下的实验测试,分析了各墙体热工性能差异的原因。研究结果表明:含PCM空心砌块墙体的温度衰减量、衰减倍数与延迟时间均较不含PCM、相同结构的空心砌块墙体显著增加;若能保持墙体中PCM的温度始终没有超越其相变温度区间,则可使复合PCM空心砌块墙体达到较好的非稳态热工性能。
In this paper, a typical structure of hollow concrete block and the commonly used phase change material (PCM), the proposed method of making a composite PCM hollow block, the PCM into the hollow block of different thickness made into a variety of forms Of the composite block, the use of variable temperature hot box method without PCM and PCM-containing hollow block wall were tested under different sets of different temperature conditions, analysis of the reasons for the difference between the thermal performance of the wall. The results show that the temperature attenuation, the attenuation multiple and the delay time of PCM hollow block wall are both less than those of PCM, and the hollow block wall with the same structure increases significantly. If the PCM temperature in the wall is always kept The phase transition temperature range, the composite PCM hollow block wall can achieve better unsteady thermal performance.