Simulation on heat transfer and thermal storage processes of foamed metal composite PCM microstructure

被引：0
|
作者：
Xu X. [1 ,2 ]
Wang L. [1 ]
Wang J. [2 ,3 ]
Wang Y. [2 ,3 ]
Huang Q. [2 ,3 ]
Huang Y. [2 ,3 ]
机构：
[1] State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing
[2] State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing
[3] School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing
来源：
Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 02期
关键词：
Composite material; Foam metal; Heat transfer and thermal storage; Microstructure; Numerical simulation; Phase change;
D O I：
10.11949/0438-1157.20201128
中图分类号：
学科分类号：
摘要：
Paraffin wax is used as the phase change material (PCM), and the three-dimensional structure model of six-sided round holes is used to numerically simulate the phase change melting process of the foam metal composite PCM. The effects of different metal foam materials (Cu, Al, Ni, Fe), pore density and porosity on the heat transfer and heat storage performance of composite PCM were studied by monitoring the liquid phase fraction and total heat storage during the phase change interface evolution. The results show that the heat transfer process of foamed metal composite PCM is affected by heat conduction and natural convection. The complete melting time of composite PCM can be shortened and heat transfer can be accelerated by increasing pore density, but the shortening range decreases with the increase of pore density and the higher the thermal conductivity of the foam metal, the greater the influence of pore density on the heat transfer rate. Thermal non-equilibrium phenomenon exists in the foamed metal composite PCM, and the increase of pore density and porosity can both reduce the maximum average temperature difference, but the effect on the final equilibrium time is quite different. Increasing pore density can shorten the final equilibrium time, while increasing porosity will prolong the final equilibrium time. In addition, the heat storage density per unit mass of foam metal composite PCM increases with the increase of porosity. Compared with foam Cu, Ni and Fe composite PCM, foam Al composite PCM has a higher heat storage density per unit mass and a higher rate. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：956 / 964
页数：8
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