热流密度对泡沫铜-石蜡强化传热的影响  

Effect of heat flux on heat transfer enhancement ofcopper metal foam-paraffin

作　　者：桂金涛 吕楠 王子龙[1] 朱刘灿 杨斌[1] 金谦 GUI Jintao;LYU Nan;WANG Zilong;ZHU Liucan;YANG Bin;JIN Qian(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;State Key Laboratory of Digital Household Appliances,Qingdao 266000,China;Karamay Carbon and Network Technology Co.,Ltd.,Karamay 834000,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]青岛海尔智能技术研发有限公司,山东青岛266000 [3]克拉玛依碳和网络科技有限公司,新疆克拉玛依834000

出　　处：《功能材料》2024年第11期11218-11226,共9页Journal of Functional Materials

基　　金：中央引导地方科技发展资金项目(YDZX20213100003002);上海市自然科学基金项目(20ZR1438600);上海市“科技创新行动计划”(21S31900200)。

摘　　要：为探究热流密度对金属泡沫铜-石蜡复合相变储能材料强化传热的影响,设计并搭建了蓄热装置,分析了热流密度对相变材料融化过程的温度分布、温度不平衡效应、传热机制和蓄热性能的影响。实验结果表明,提高热流密度会加剧复合相变材料内部温度不均衡效应,当热流密度从3.6增加至10.9 kW/m^(2)时,相变材料内部垂直方向上最大温差从12.16增加至32.97 K,加热壁面中部和顶部与之水平所对应的相变材料的中部和顶部中心位置处的最大温差分别从34.05增加至75.55 K和25.68增加至49.85 K。蓄热速率从11.32增加至37.56 J/s,蓄热量从18.59增加至24.64 kJ。此外,复合相变材料的等效导热系数和综合传热系数分别增加了61.06%和6.41%,此时,相变材料融化时传热机制中自然对流占比从0.207提高至0.313。To investigate the effect of heat flux on the enhanced heat transfer of metal foam copper-paraffin composite phase change energy storage materials,this paper designs and builds a set of semi-cylindrical visual heat storage device,analyzes the enhanced heat transfer mechanism of heat flow density on the melting process of phase change materials.The experimental results show that increasing the heat flux exacerbates the temperature imbalance effect inside the composite phase change material.When the heat flux is increased from^(3).6 to 10.9 kW/m^(2),the maximum temperature difference inside the phase change material in the vertical direction is increased from 12.16 K to 32.97 K.The maximum temperature differences between the middle and the top of the heated wall and the horizontal corresponding to the center of the phase change material and the top are increased from^(3)4.05 K to 75.55 K and 25.68 K to 49.85 K,respectively.The maximum temperature difference between the middle and top of the heated wall and the center of the phase change material at the level of the top and the middle and top of the heated wall increased from^(3)4.05 K to 75.55 K and 25.68 K to 49.85 K,respectively.The rate of heat storage increased from 11.32 J/s to 37.56 J/s,and the amount of heat storage increased from 18.59 kJ to 24.64 kJ.In addition,the effective thermal conductivity and the integrated heat transfer coefficient of the composite phase change material increased by 61.06%and 6.41%,respectively,at which time the percentage of natural convection in the heat transfer mechanism during melting of the phase change material was increased from 0.207 to 0.313.

关 键 词：金属泡沫 热流密度 相变储能 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]