化工进展2025，Vol.44Issue(z1)：388-399,12.DOI:10.16085/j.issn.1000-6613.2025-0182
非均匀热流下金属泡沫复合相变材料的熔化传热特性
Characterization of melting heat transfer properties of metal-foam composite phase change materials under non-uniform heat flow
摘要
Abstract
Phase change material(PCM)is an effective choice for thermal energy storage and heat dissipation in thermal devices.However,their lower thermal conductivity reduces the rate of heat storage and dissipation.In this study,copper foam was used to improve the thermal properties of paraffin wax,its melting heat transfer characteristics under a non-uniform heat flow boundary were investigated by means of numerical simulation with Ansys Fluent software,and a visualization experimental setup was established to study the melting behavior of copper foam-paraffin composites.The effects of porosity on the melting heat transfer process,including the solid-liquid interface movement and temperature distribution,under the non-uniform thermal boundary at the bottom were discussed.The results showed that the non-uniform thermal boundary would exacerbate the temperature inhomogeneity,and the maximum temperature difference between different locations could reach 166 ℃.After adding copper foam,the temperature difference between different locations in the same plane perpendicular to the direction of heat transfer could be significantly reduced to improve the homogeneity of the overall structure,and with the reduction of the porosity,this effect was more and more obvious,with the temperature difference reduced from 35 ℃ at porosity 0.98 to 13 ℃ at 0.85,which greatly improved the temperature uniformity of the heat transfer process and the stability of the heat storage system.This study supplemented the melting heat transfer properties of metal foam composite phase change materials under non-uniform thermal boundary,which had certain practical significance.关键词
相变材料/金属泡沫/非均匀热流/熔化规律/传热Key words
phase change material/metal foam/non-uniform heat flow/temperature inhomogeneity/heat transfer分类
通用工业技术引用本文复制引用
吴刚,沈珍华,焦凤,何永清..非均匀热流下金属泡沫复合相变材料的熔化传热特性[J].化工进展,2025,44(z1):388-399,12.基金项目
云南省基础研究计划(202501AT070325,202401AT070348) （202501AT070325,202401AT070348）
国家自然科学基金(52366005). （52366005）
