高孔密度下泡沫铜的填充率对石蜡融化传热机理的影响

doi:10.16085/j.issn.1000-6613.2021-1412

化工进展 ›› 2022, Vol. 41 ›› Issue (6): 3203-3211.DOI: 10.16085/j.issn.1000-6613.2021-1412

高孔密度下泡沫铜的填充率对石蜡融化传热机理的影响

朱孟帅¹(), 王子龙¹(), 孙向昕¹, 周翔²

^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

收稿日期:2021-07-05 修回日期:2021-08-18 出版日期:2022-06-10 发布日期:2022-06-21
通讯作者: 王子龙
作者简介:朱孟帅（1996—），男，硕士研究生，研究方向为相变储能技术。E-mail: 2603355102@qq.com。
基金资助:
国家自然科学基金面上项目(51876130);上海市自然科学基金(20ZR1438600);上海市教委青年东方学者项目(1018301008);上海市浦江人才计划(18PJ1408900)

Experimental research on effect of copper metal foam proportion on paraffin wax melting and heat transfer mechanism under high cell density

ZHU Mengshuai¹(), WANG Zilong¹(), SUN Xiangxin¹, ZHOU Xiang²

^1.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
^2.School of Mechanical and Energy Engineering, Tongji University, Shanghai 201804, China

Received:2021-07-05 Revised:2021-08-18 Online:2022-06-10 Published:2022-06-21
Contact: WANG Zilong

摘要/Abstract

摘要：

基于石蜡和高孔密度的泡沫铜制备了复合相变蓄热材料，设计并搭建了一套可视化蓄热实验装置，分析了高孔密度下泡沫铜填充率对石蜡相变过程的强化传热机理，得到了复合相变蓄热材料的综合传热系数。实验结果表明，当泡沫铜填充率为0、0.43%、1.29%和2.15%时，复合相变材料的综合传热系数先减小后增大，分别为1.26W/(m·K)、1.18W/(m·K)、1.44W/(m·K)和1.88W/(m·K)，因此随着泡沫铜填充率的增加，复合相变材料的融化时间先增长后缩短。此外，随着泡沫铜填充率从0.43%增至2.15%，复合相变材料融化时传热机制中导热占比从17.26%上升到86.01%，自然对流占比从82.74%下降到13.99%。

关键词: 相变蓄热, 泡沫金属, 相变材料, 对流换热强度, 综合传热系数

Abstract:

Using paraffin wax and copper metal foam, copper metal foam composite phase change materials were prepared in this study. The effect of the copper metal foam proportion on heat transfer enhancement in the melting process of PCMs was analyzed using visualization heat storage experimental equipment. The integrated heat transfer coefficient of the copper metal foam composite PCMs was obtained. The experimental results showed that when the copper metal foam proportion was 0, 0.43%, 1.29% and 2.15%, the integrated heat transfer coefficient of the composite phase change material first decreased and then increased, which was 1.26W/(m·K), 1.18W/(m·K), 1.44W/(m·K) and 1.88W/(m·K), respectively. Thus, with the increase of copper metal foam proportion, the melting time of composite phase change materials increased first and then decreased. In addition, as the proportion of copper metal foam increased from 0.43% to 2.15%, the proportion of heat conduction in the heat transfer mechanism rose from 17.26% to 86.01% and the proportion of natural convection dropped from 82.74% to 13.99%.

Key words: phase change heat storage, copper metal foam, phase change materials, natural convection intensity, integrated heat transfer coefficient

中图分类号:

TK02

朱孟帅, 王子龙, 孙向昕, 周翔. 高孔密度下泡沫铜的填充率对石蜡融化传热机理的影响[J]. 化工进展, 2022, 41(6): 3203-3211.

ZHU Mengshuai, WANG Zilong, SUN Xiangxin, ZHOU Xiang. Experimental research on effect of copper metal foam proportion on paraffin wax melting and heat transfer mechanism under high cell density[J]. Chemical Industry and Engineering Progress, 2022, 41(6): 3203-3211.

图/表 12

图1 铜金属泡沫复合石蜡

表1 石蜡热物性

密度/kg·m^-3	热导率/W·m^-1·K^-1	固态比热容/J·kg^-1·K^-1	液态比热容/J·kg^-1·K^-1	相变起始点/K	相变终止点/K	相变潜热/J·kg^-1
837	0.305	1750	2540	348	365	218400

图2 可视化实验系统

图3 铂电阻位置布置

图4 不同填充率下复合相变材料

图5 对照组中的复合相变材料

图6 不同填充率的蓄热装置内部换热方式

图7 泡沫铜填充率对石蜡温度分布的影响

图8 泡沫铜填充率对石蜡融化过程中Ra的影响

图9 泡沫铜的填充率对石蜡固液界面的影响

表2 泡沫铜填充率对复合相变材料综合传热系数的影响

填充率/%	等效热导率/W·m^-1·K^-1	综合换热系数/W·m^-1·K^-1
0	1.26	1.26
0.43	0.98	1.18
1.29	0.67	1.44
2.15	0.29	1.88

图10 泡沫铜填充率对复合相变材料融化过程中的导热和自然对流的影响

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高孔密度下泡沫铜的填充率对石蜡融化传热机理的影响

Experimental research on effect of copper metal foam proportion on paraffin wax melting and heat transfer mechanism under high cell density

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