In this study,the Capric-palmitic acid(CA-PA)binary eutectic PCM was vacuum impregnated into the expanded vermiculite(EVM)to prepare CA-PA/EVM composite phase change thermal storage material.FT-IR,DSC,TG,and thermal cycling were used to assess the chemical compatibility,heat storage performance,thermal stability,and thermal reliability of CA-PA/EVM.The results showed that CA-PA was stably loaded in the layered pores of EVM through physical interaction,and CA-PA/EVM had excellent chemical compatibility.The Melting and solidification phase transition temperatures of CA-PA/EVM were 23.61 and 20.41℃,respectively.The latent heat of melting and solidification phase transition were 67.22 and 64.87 J/g,respectively.The amount of CA-PA encapsulated in EVM could reach 52.22%,and it had favorable thermal stability at working temperature.In addition,the CA-PA/EVM maintained great thermal reliability after 100 thermal cycles,indicating its potential application in the building energy conservation field.
关键词
癸酸-棕榈酸/膨胀蛭石/复合相变储热材料/建筑节能
Key words
capric acid-palmitic acid/expanded vermiculite/composite phase change energy storage material/building energy conservation
维普
万方数据