高孔密度的泡沫铜对石蜡储热性能的研究  

Research on energy storage behavior of composite phase change materials with high pore density of copper metal foam

作　　者：朱孟帅 王子龙[1] 张华[1] 孙向昕 周翔[2] ZHU Mengshuai;WANG Zilong;ZHANG Hua;SUN Xiangxin;ZHOU Xiang(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering, University of Shanghai for Sciences and Technology,Shanghai 200093, China;School of Mechanical and Energy Engineering, Tongji University, Shanghai 201804, China)

机构地区：[1]上海理工大学能源与动力工程学院,上海市动力工程多相流动与传热重点实验室,上海200093 [2]同济大学机械与能源工程学院,上海201804

出　　处：《功能材料》2022年第1期1134-1140,共7页Journal of Functional Materials

基　　金：国家自然科学基金面上项目(51876130);上海市自然科学基金项目(20ZR1438600);上海市教委青年东方学者项目(1018301008);上海市浦江人才计划项目(18PJ1408900);上海市“科技创新行动计划”生物医药科技支撑专项项目(21S31900200)。

摘　　要：基于石蜡和高孔密度的泡沫铜制备了复合相变储热材料,设计并搭建了一套可视化储热实验装置,分析了高孔密度下泡沫铜的填充率对石蜡储热性能的影响。实验结果表明,当泡沫铜填充率从0%增至2.15%时,复合相变储热材料的融化时间从992 s缩短至872 s,缩短了11.69%,温度梯度从23.23 K减至7.77 K,降低了66.55%,储热量先增大后减小,分别为20.92、21.22、21.02和20.22 kJ,储热速率先降低后升高,分别为21.08、20.91、21.67和23.25 J/s。此外,自然对流是低泡沫铜填充率下相变材料融化的主导机制,热传导是高泡沫铜填充率下相变材料融化传热的主导机制,并且随着融化时间的进行,导热逐步向自然对流转变。In this paper,a composite phase change heat storage material is prepared based on paraffin wax and foamed metal copper,and a visual heat storage experimental device is designed and built.The enhanced heat transfer mechanism of the copper metal foam proportion on the paraffin heat storage process is analyzed.The experimental results show that when the copper metal foam proportion increases from 0%to 2.15%,the melting time of the composite phase change materials is shortened from 992 s to 872 s,which is a reduction of 11.69%.The temperature gradient is reduced from 23.27 K to 8.09 K,which is a reduction of 65.23%.The heat storage capacity of the composite phase change materials first increases and then decreases,which are 20.92,21.22,21.02 and 20.22 kJ respectively,and the heat storage rate first decreases and then increases,which are 21.08,20.91,21.67 and 23.25 J/s respectively.In addition,natural convection is the major mechanism for phase change material with a low copper metal foam proportion,heat conduction is the major mechanism for phase change material with a high copper metal foam proportion,and the heat conduction gradually changes to natural convection with the melting time.

关 键 词：相变储热 泡沫铜 固-液相界面 自然对流 储热性能 

分 类 号：TK02[动力工程及工程热物理] TK124