控温热箱法相变墙体传热性能实验研究

以填有相变材料的空心砌块所砌成的相变南外墙为研究对象,利用控温热箱装置研究其传热性能。研究表明:相变墙体的热惰性强于普通墙体,相变墙体对温度和热流的衰减与外界温度波幅的大小和平均温度有关,当外界温度波幅越大、外界平均温度与相变材料平均温度越接近,相变墙体对温度和热流的衰减和延迟效果越明显。所以相变墙体适合用于昼夜温差较大的地区,当相变温度与外界日平均温度相当则节能效果较好。

Warm box method change the wall heat transfer performanceof the experimental study

Taking south wall which is cemented by the hollow block that is filled with phase-change-materials (PCMs) as the research object, the temperature controlled hot box device is used to study the heat transfer performance. The result shows that the thermal-inertia property of the phase-change-wall is stronger than that of ordinary wall. Besides, the size of external temperature amplitude and the average temperature have influence on how much the wall attenuates temperature and heat flux. The greater size of external temperature amplitude is, and the closer that the phase-change temperature and the average daily external temperature becomes, the more obvious that the wall attenuates and delays temperature and heat flux can get. So the phase-change wall is suitable for larger areas where diurnal temperature difference is big, and when the phase-change temperature and the average daily external temperature are equivalent, the energy-saving effect is better.