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化工学报  2015 

多尺度复合毛细芯环路热管的传热特性

DOI: 10.11949/j.issn.0438-1157.20141581, PP. 2055-2061

Keywords: 环路热管,毛细芯,多尺度,传热特性,热泄漏

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Abstract:

为解决环路热管在蒸发腔不同区域对于毛细芯孔径尺度和热导率的不同需求,制备了一种多尺度复合毛细芯环路热管,并在不同加热功率、放置角度和冷却方式下对环路热管进行了热性能测试。实验发现该环路热管具有较好的传热性能,在200W加热功率下,蒸发腔壁面中心温度Tc最低仅为64℃。与风冷方式相比,冰冷方式可以显著强化环路热管的传热性能,降低Tc和热阻。热阻最低为0.19K·W-1。同时冰冷方式也有利于改善均温性。当加热功率不同时,放置角度对环路热管温度及热阻的影响有所不同。另外,多尺度复合毛细芯的应用有效地降低了热泄漏。随着加热功率的增加,放置角度不同的LHP的热泄漏变化趋势不同。

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