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相变材料的固液相变具有较高的相变潜热且相变体积变化小,在间歇性工作的电子器件的温控中得到广泛的应用。本文采用将铜泡沫嵌入相变材料中的方法来强化固液相变的传热性能的方法,提出一种封装有金属泡沫和相变材料的复合式散热器结构,实验研究了该散热器的加热表面的温度与时间的变化关系,分析铜泡沫孔隙率、孔密度以及石蜡物性等各个参数对该复合式热沉散热效果的影响。
Phase change material has high phase transition latent heat of solid-liquid phase transition and small changes in phase transition volume, intermittent temperature control of electronic devices are widely used. In this paper, the method of embedding copper foam into phase change material to strengthen the heat transfer performance of the solid-liquid phase change was proposed, and a composite heat sink structure encapsulated with metal foam and phase change material was proposed. The structure of the heat sink The relationship between the temperature and the time of heating surface was analyzed. The influence of various parameters such as porosity, pore density and physical properties of paraffin on the heat dissipation of the composite heat sink was analyzed.