石墨烯微通道散热器的传热特性

Heat-transfer characteristic of graphene-coated microchannel heat sink

为了改善传统微通道散热器的传热特性,提出了一种新型的微通道散热器,相较于传统直通道散热器,不仅增加了横向通道,而且在传热板的下表面覆加了具有超高热导率的石墨烯层,利用数值分析的方法研究添加了横向通道和石墨烯层后的微通道散热器和传统直通道散热器的传热特性。结果表明:横向通道的加入降低了微通道散热器受热面最高温度、最低温度和温差,并且随着热通量的增加,降低幅度增大。石墨烯层的加入使温差大幅度降低,进一步改善了散热效果。

A new type of microchannel heat sink is proposed to increase heat-transfer characteristic of traditional microchannel heat sink.The transverse microchannels are added compared to the traditional straight channels,and a layer of graphene that owns ultra high thermal conductivity is applied onto the lower surface of the plate of heat dissipation.Numerical analysis method is used to research on heat transfer performance of the traditional straight channel heat sink and the proposed new microchannel heat sink, and results show that the maximum temperature,the minimum temperature and the temperature difference of the proposed microchannel heat sink are decreased greatly by the adding transverse channel.As the heat flux is increased, reduction is increased.The addition of graphene layer mainly causes the significant reduction of temperature difference.Heat dissipation effect is further improved.