功率元件浸没式热管换热器试验研究

褚礼亚¹，柴中华^1，2，奚俊彬²，史婷婷²，陆国栋^{1, 2, 3*}

1.浙江银轮新能源热管理系统有限公司，浙江 天台  317200;

2.浙江银轮机械股份有限公司，浙江 天台  317200;

3.浙江省汽车智能热管理科学与技术重点实验室，浙江 天台  317200

摘要：为提高功率元件浸没式热管换热器的散热性能，将功率元件不同程度地浸入到热管换热器的液态工质中，开展重力热管试验，研究不同浸没方式下热管换热器的极限热负荷，固定工质液温、功率元件和热管换热器接触面的壁温时热管的换热性能，冷风侧出口截面的均温性。试验结果表明：直接利用工质相变换热将功率元件产生的热量传递到外界，可以消除接触式换热中接触面位置的高热阻，最大限度地保障功率元件表面温度的一致性；与接触式换热相比，真空状态下浸没式相变换热能力显著提高；工质液温以及功率元件壁温可作为监控浸没式功率元件温度的目标参数。

关键词：热管；功率元件；浸没；试验研究

Experimental study on power component immersed inside heat pipe

CHU Liya¹, CHAI Zhonghua^{1, 2}, XI Junbin¹, SHI Tingting1, LU Guodong^{1 ,2, 3*}

1.Zhejiang Yinlun Thermal Management Systems of New Energy Co., Ltd., Tiantai 317200, China;

2.Zhejiang Yinlun Machinery Co., Ltd., Tiantai 317200, China;

3.Key Laboratory of Smart Thermal Management Science & Technology for Vehicles of Zhejiang Province, Tiantai 317200, China

Abstract: In order to improve the heat dissipation of the power element, the power element is immersed in the liquid working medium of the heat pipe heat exchanger to different degrees, and the gravity heat pipe test is carried out to study the limit heat dissipation capacity of the heat pipe radiator under different immersion degree and contact type, the heat transfer performance of the heat pipe under fixed liquid temperature of the working medium, the wall temperature of the power element and the contact surface of the heat pipe heat exchanger, and the temperature uniformity of the outlet section of the cold air side. The test results show that the heat generated by the power element can be transferred to the outside world directly by using the phase transformation heat of the working medium, which can eliminate the high thermal resistance of the contact surface and ensure the consistency of the surface temperature of the power element to the maximum extent. Compared with the contact heat transfer, the heat transfer capacity by immersed phase change under vacuum is significantly improved. The liquid temperature and the wall temperature of the power element can be used as a target parameter to monitor the temperature of the submerged power element.

Keywords: heat pipe; power component; immerse; experimental study