Design of Low Melting Point Alloy Phase Change Heat Sink and Study on Its Heat Dissipation Performance
To address the heat dissipation challenges of electronic devices in its short-term dynamic high-power operation without wind and coolant,this study proposes a low melting point alloy phase change heat sink with thermal fin structure.A thermal simulation model considering the volume shrinkage during liquid-solid phase transition of the alloy is developed.The heat dissipation performance of the heat sink is studied by simulation and experiment.Results show that the heat dissipation performance of low melting point alloy phase change heat sink is significantly better than that of alkane phase change heat sink.Under the same operation conditions,the maximum temperature of heating element of alloy heat sink is reduced by 71.9 ℃ and 32.7 ℃ compared to that of alkane heat sink respectively,when they have the same volume or the same mass.In addition,factors such as heating power and installation pose also have significant impact on the heat dissipation performance of the alloy heat sink.Compared to forward installation,reverse or vertical installation leads to an increase in maximum temperature of heating element by 15 ℃ and 12.9 ℃ respectively.
low melting point alloyphase changeheat sinkheat dissipation performance
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