填充泡沫复合相变材料的热控单元热性能研究

Numerical investigation of thermal control unit with foam composite phase change material

建立了分析可移动电子设备热控制单元(TCU)热性能的二维数学模型,并进行了数值计算.结果表明,填充泡沫复合相变材料(FCPCM)和肋都能很好地提高TCU内相变材料(PCM)的导热性能,能更好地满足电子元件的工作要求,且前者方案更具优势.此外,还对泡沫骨架材料和PCM的选择进行了计算分析,结果表明,孔隙率是影响TCU热性能的重要参数,铝FCPCM具有良好的热性能,PCM的选择应视电子元件的使用设计要求而定.所得结论对移动电子设备TCU的设计和优化有一定的指导作用.

Two-dimensional mathematical model of portable electronic devices thermal control unit（TCU） was presented,and numerical computation was conducted to analyze its thermal performance.The results show that,TCU design by filling with foam composite phase change material（FCPCM） and adding fins can well improve the heat conduction of phase change material（PCM） in the TCU and also satisfy the need of electronics working condition;and the former design is superior to the latter one.Furthermore,numerical investigations were made to study the selection of foam matrix material and PCM.It is concluded that porosity is a key parameter of TCU design,and aluminum FCPCM has good thermal performance and the selection of PCM should depend on the operating condition of electronics.The conclusion provides guidelines for portable electronic devices TCU design and optimization.