三水醋酸钠基复合相变材料导热能力强化研究  

Study of Enhancing Heat Conductivity of Composite Phase Change Material Based on Trihydrate Sodium Acetate

作　　者：李伟华[1] 茅靳丰[1] 李金田[2] 李永[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007 [2]海军工程大学勤务学院,天津300450

出　　处：《建筑材料学报》2013年第3期517-520,共4页Journal of Building Materials

基　　金：国家人防科研基金资助项目(RF20070208)

摘　　要：在三水醋酸钠基复合相变材料中添加导热强化剂铜粉、碳粉和膨胀石墨,研究导热强化剂对复合相变材料导热性能的影响.利用示差扫描量热仪测量膨胀石墨添加前后复合相变材料的热特性.结果表明:膨胀石墨能与三水醋酸钠基复合相变材料很好共融,并对复合相变材料的导热有显著的强化效果.膨胀石墨掺量为10%(体积分数)时,三水醋酸钠基复合相变材料相变焓为307.762kJ/kg,与未添加膨胀石墨复合相变材料相变焓相比减少不到2%,而导热系数却提高了2倍.The effect of heat conduction intensifiers, including copper powder, carbon powder and expand- ed graphite, on the heat conductivity of composite phase change material（PCM） based on trihydrate sodium acetate were studied. The thermal characteristics of the PCM with or without expanded graphite added were measured by the differential scanning calorimeter. Studies have shown that expanded graphite can melt together with PCM well, and the intensified effect on the heat conductivity of PCM is obvious. When the use level （by volume） of expanded graphite is 10%, the phase transition enthalpy of PCM is 307. 762 kJ/kg, this is 2% less than that without expanded graphite added, but the thermal conductivity increases 2 times.

关 键 词：三水醋酸钠 导热 强化剂 复合相变材料 

分 类 号：TU96[建筑科学]