多孔铜纤维骨架复合相变材料制备及温控性能研究  

Study on Temperature Control Properties of Different Height Porous Fiber Matrix Composites

作　　者：江浩 黄书烽 庄文玮[1] Jiang Hao;Huang Shufeng;Zhuang Wenwei(School of Mechanical and Electronic Engineering,East China University of Technology,Nanchang 330013,China;Jiangxi Province Engineering Research Center of New Energy Technology and Equipment,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学机械与电子工程学院,南昌330013 [2]东华理工大学江西省新能源工艺及装备工程技术研究中心,南昌330013

出　　处：《机电工程技术》2023年第2期86-89,共4页Mechanical & Electrical Engineering Technology

基　　金：东华理工大学江西省新能源工艺及装备工程技术研究中心开放基金资助项目(编号:JXNE2020-04);江西省教育厅科技项目(编号:GJJ200739)。

摘　　要：相变材料储热密度大的优点在电子器件热管理系统上具备很大的应用潜力,但导热率低这一属性极大削弱了其在相变过程中的传热效率,影响了在热管理领域的应用范围。针对以上问题,以石蜡作为相变材料,通过多齿刀具加工出连续铜纤维,制备出具备高导热率的铜纤维多孔纤维骨架,再用水浴法将其嵌入石蜡相变材料内部,制备出多孔铜纤维骨架复合相变材料(MFPCM)。通过实验探究了高度为10 mm、15 mm、20 mm复合相变材料的温控性能。实验结果显示高度为10 mm、15 mm、20 mm MF-PCM的温控时间分别为505 s、615 s、724 s,根据不同应用场景选择MF-PCM高度。此外,临界温度为60℃时,在低输入功率情况下,20 mm高度的MF-PCM温控效果更显著;高输入功率时,不同高度MF-PCM温控效果相差不大,优先选择高度更低的MF-PCM以节约成本。在临界温度为90℃时,高度为20 mm的MF-PCM表现出优异的温控性能。Phase-change materials have great potential in thermal management systems of electronic devices due to high heat storage density.However,the low thermal conductivity greatly weakens their heat transfer efficiency in the process of phase transition,which affects the application in the field of thermal management.In order to solve the above problems,paraffin was used as phase change material,continuous copper fiber was processed by multi-tooth cutting tools to prepare copper fiber porous fiber skeleton with high thermal conductivity,and then the porous copper fiber skeleton composite phase change material(MF-PCM)was prepared by embedding it into the paraffin phase change material by water bath method.In different practical application scenarios,the height of the composite phase change material is different,so the temperature control performance of the composite phase change material with the porosity of 75%at the height of 10 mm,15 mm and 20 mm is explored.Through the visual temperature measuring platform,the temperature control performance is studied.The experimental results show that the temperature control time of 10 mm,15 mm and 20 mm MF-PCM is 505 s,615 s and 724 s,respectively.The height of MF-PCM can be selected according to different application scenarios.In addition,when the critical temperature is 60℃,the temperature control effect of 20mm height MF-PCM is more significant in the case of low input power.When the input power is high,the temperature control effect of MFPCM at different heights is not different,so the MF-PCM with lower height is preferred to save cost.When the critical temperature is 90℃,the height of 20 mm MF-PCM shows excellent temperature control performance.

关 键 词：多孔铜纤维骨架 复合相变材料 温控性能 临界温度 

分 类 号：TB33[一般工业技术—材料科学与工程]