Phase change energy storage material(PCM)has the advantages of high heat storage density and al-most constant temperature in the process of heat storage/release.It is an ideal solution to solve the problem of high heat flux in the narrow space of electronic devices.However,the low thermal conductivity and poor heat transfer efficiency of PCM limit its application.To solve the above problems,the porous aluminum skeleton was prepared by 3 D printing using paraffin as phase change material,and then the paraffin was poured into the por-ous aluminum skeleton by water bath perfusion method to prepare porous aluminum skeleton/composite phase change material(AS-PCM).The temperature control performance of three different porosity of 95%,85%and 75%was explored through experiments.The experimental results show that the addition of porous aluminum skeleton can enhance the heat transfer of PCM,thus reducing the temperature of heat source.At higher power,AS-PCM improves heat transfer more obviously.Before melted,the bottom temperature and temperature gradi-ent of the low porosity AS-PCM heat sink are lower.The use of porous aluminum skeleton instead of foam met-al provides a new porous metal matrix for improving the thermal conductivity of PCMs.
关键词
多孔铝骨架/3D打印/复合相变材料/温控性能
Key words
porous aluminum skeleton/3 D printing/composite phase change materials/temperature control per-formance
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