墙体储能用定形相变石蜡储热性能的实验研究

实验配制并研究了以高密度聚乙烯为支撑材料的定形相变石蜡.所使用的石蜡为由液体石蜡分别与46#石蜡、48#石蜡配制的两种适于墙体中使用低熔点混合物,相变温度分别为26.6、25.5℃,相变潜热较大.利用DSC实验研究了两种石蜡混合物分别与高密度聚乙烯按40%～90%比例配制成的定形相变材料的相变温度、相变潜热、均匀性和稳定性.定形相变材料在低温区的相变温度与石蜡的相变温度基本一致,在26～28℃之间,定形材料相变潜热近似等于石蜡的相变潜热与石蜡百分含量的乘积.定形相变材料中石蜡的最佳含量为70%,此时相变潜热约为100J/g.

THERMAL PERFORMANCE ANALYSIS OF SHAPE-STABILIZED PHASE CHANGE PARAFFIN USED IN THE WALL

The shape-stabilized phase change paraffin with high-density polyethylene as the support materials was prepared and studied in the paper. The prepared paraffin was made by mixing liquid paraffin with either 46 # paraffin or 48 # paraffin. Both the two mixtures have low melting point and are suitable for the wall. Their phase change temperatures are 26.6 and 25.5℃, respectively, and they have higher phase change latent heats. The phase change temperatures, the phase change latent heats, the uniformity and stability of the shape-stabilized phase change materials with different constituent 40%-90% were experimentally studied by DSC. The optimal proportion adding paraffin into the shape-stabilized phase change material was 70% , and the phase change latent heats are about 100J/g. The research shows that the shape-stabilized phase change paraffin is the ideal energy storage materials used in the wall. The results can provide references and basis for the development of phase change material wall.