泡沫金属毛细芯热管热性能实验研究

Experimental investigation on thermal performance of metal foam capillary wick heat pipe

为解决大功率电子元器件的热管理问题,利用超轻多孔泡沫铜金属为毛细芯,设计一种新型热管(NHP)。以丙酮为工质,研究热流密度、热管倾角对该新型热管热性能的影响,并与传统热管(CHP)、热沉(heat sink)的热性能进行对比。研究结果表明:新型热管不仅热性能最佳,而且具有优异的均温特性,当热管倾角为0°、热流密度为117.2 W/cm^2时,加热面测温点之间的最大温差不超过7.0℃,且加热面中心点温度仅为56.2℃。热管倾角对新型热管的热性能有一定的影响,且热管倾角为0°时的热性能优于180°时的热性能。

In order to solve the thermal management problem of high power electronic devices,a novel heat pipe(NHP)was designed with ultra-light porous copper foam metal as capillary wick.The effect of heat flux q and inclination angel of heat pipeθon thermal performance of the NHP was studied using acetone as the working fluid.The differences of thermal performance among NHP,convention heat pipe(CHP)and heat sink(without heat pipe)were compared.The results show that the NHP has not only good heat transfer capability,but also wonderful temperature uniformity.Whenθ=0°and q=117.2W/cm2,the largest temperature difference between the measuring point is less than7.0℃,and the center temperature of the heating surface is just56.2℃.Inclination angle of heat pipe has certain effect on thermal performance of the NHP,and the thermal performance ofθ=0°is better than that ofθ=180°.