为了提高以三水醋酸钠为基质的复合相变储热材料(PCM)的导热性能,选用铜粉、碳粉、膨胀石墨作为导热系数改善剂,并进行对比实验,结果表明铜粉、碳粉与复合PCM混合后分层明显,而膨胀石墨的混合效果较好,且当膨胀石墨体的积分率约为10%时,利用其多孔吸附特性和较好的导热性能,对复合PCM(含增稠剂和成核剂)的导热性能改善明显。 In order to improve the thermal conductivity of composite phase change thermal storage material (PCM) based on sodium acetate trihydrate, copper powder, carbon powder and expanded graphite were selected as the thermal conductivity improvers. The results showed that copper powder, After mixing with composite PCM, the delamination is obvious, but the mixing effect of expanded graphite is better. When the integral rate of expanded graphite is about 10%, the porous PCM and its composite Thickening agents and nucleating agents) have an obvious improvement in the thermal conductivity.