金属基复合高温相变储热材料制备与性能研究  

Preparation and Thermal Properties of Metal-Based Composite Phase Change Material for High Temperature Thermal Energy Storage

作　　者：徐阳[1] 朱桂花[2] 吕硕[2] 单博[1] 何雅玲[1] 

机构地区：[1]西安交通大学能源与动力工程学院热流科学与工程教育部重点实验室,西安710049 [2]北方民族大学化学与化学工程学院,银川750021

出　　处：《工程热物理学报》2016年第7期1371-1376,共6页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划项目(973计划)(No.2013CB228304;No.2013CB228303)

摘　　要：本文以二元共晶碳酸盐（Li2CO3-K2CO3）为高温相变储热材料,泡沫金属铜为骨架基体,制备了具有高导热性能、高储热密度的金属基复合高温相变储热材料。对复合材料制备过程中泡沫金属的填埋方式等制备条件进行了优选,对相变材料的储热密度及导热系数进行了计算和测试,分析了泡沫铜孔密度、孔隙率等参数对材料性能的影响规律。结果表明：40 PPI泡沫金属在相变材料中的最佳填埋方式为中埋法,35 PPI泡沫金属的最佳填埋方式为底埋法。使用孔隙率在95%左右的泡沫铜,可使相变材料导热系数提高34倍,同时保证了复合相变材料具有较高的储热密度。In this study,metal-based composite phase change material was prepared with the binary carbonate eutectic salts（Li2CO3-K2CO3） as high temperature phase change material and metal foam as the skeleton.The preparation conditions such as burying method of metal foam in the salt were discussed and optimized.Thermal energy storage density and thermal conductivity were calculated and measured respectively.Furthermore,effects of cell density and porosity of the metal foam on the performance of composite phase change material were analyzed.The results show that the best burying method for 40 PPI metal foam is the middle burying and for 35 PPI metal foam is the bottom burying.The thermal conductivity of the binary carbonate eutectic salts can be improved by 3 to 4 times,and the thermal energy storage density can still remain at relatively high level by using metal foam with a porosity of about 95%.

关 键 词：高温相变储热 二元共晶碳酸盐 强化换热 复合相变材料 泡沫金属 

分 类 号：TK123[动力工程及工程热物理—工程热物理]