大功率电力设备的冷却方式成为制约电力设备集约化紧凑性的重要因素.常规水冷技术难以应对具有高热流密度的工况条件,而新兴的液态金属冷却技术具有解决该难题的潜力.为此,本文建立了基于液态金属的高热流密度电力设备冷却实验平台.在该平台基础上,开展了液态金属和水的对流换热系数和热导率对比实验.实验表明,在相同工况条件下,以液态金属替代水作为冷却介质,系统热阻可由0.033 K/W降低至0.019 K/W;若进一步以液态金属替代传统导热膏作为界面材料,则散热系统热阻可降低至0.014 K/W.%Cooling the electric equipment with high power is one of the important issues to limit the compactness and intensity of electric equipment. Traditional water cooling can not deal with the operating conditions of high heat flux, however, novel liquid metal cooling has the potential to solve the problem. Therefore, this paper presents a study based on liquid metal cooling system for high heat flux electric equipment. The contrast experiments of con-vective heat transfer coefficient and thermal conductivity between the liquid metal and water are carried out. Experi-mental results show that the system thermal resistance can be reduced from 0. 033 K/W to 0. 019 K/W when using liquid metal instead of water as the coolant. Moreover, if further using liquid metal as the thermal interface materi-al, the system thermal resistance can be finally reduced to 0. 014K/W.
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