用于IGBT散热的细微通道液冷基板变工况传热特性实验研究详解.doc

中国工程热物理学会 传热传质学 学术会议论文 编号：(陈常念1，1，，2，赵国亮2 (1.山东大学能源与动力工程学院，山东 济南 250061；2. 国网智能电网研究院，北京，100192) Tel E-mail：chen.cn@sdu.edu.cn 摘 要：IGBT水冷基板在非常情况下导致冷却失效甚至造成系统瘫痪的危险发生，针对设计制作的一种平行微通道水冷基板在多种变工况条件下进行了其传热性能的实验研究；实验研究的变工况条件包括供水系统的瞬态启动或停止条件，流量范围50 kg/h-380 kg/h的波动变化条件以及水冷基板部分流道堵塞的条件，重点研究了上述实验条件对被冷却器件表面温度及其冷却效果的影响规律；结果表明瞬态变化条件下高热流密度时会发生危险工况，其反应时间RT10 s，流量波动条件下当平均努赛尔数Nu较小时对冷却效果影响较大，水冷基板部分流道堵塞的条件不会导致大幅温升。 关键词：水冷基板；瞬态特性；变工况运行；热流密度；IGBT Experimental study on the heat transfer?characteristics of?a liquid cold plate for IGBT under variable conditions Chen Chang-nian1, Gong Wei-ping1, Qiao Er-min2, Hu Xiao2, Zhao Guo-liang2 (1. School of Energy and Power Engineering, Shandong University, Jinan 250061, China; 2. Smart Grid Research Institute, State Grid Corporation of China, Beijing 100192, China.) Abstract: Experiments have been carried out to study the heat transfer characteristics of one kind of liquid cold plate with parallel micro flow channel, which was designed for IGBT in this paper, under several variable conditions including transient start/stop, fluid flux fluctuating and flow channel blockage. The influence of the above conditions on IGBT surface temperature and the cooling effect of the liquid cold plate have been investigated under a range of flow rates of 50 kg/h-380 kg/h. It is found that it is dangerous for the cooling system under high heat flux when start/stop conditions occurs, when the Respond Time (RT) is less than 10 seconds. The effect on IGBT surface temperature of fluid flux fluctuating condition is obvious when the average Nusselt Number Nu is smaller. And the safest conditions are flow channel blockage under current experimental conditions, which can not result in a significant temperature rise. Key words: liquid cold plate; transient?characteristic; variable conditions; heat flux；IGBT 0引言 IGBT）为例，高度集成的IGBT封装表面会产生极大的热流密度，这