摘要
为避免绝缘栅双级晶体管（insulated gate bipolar transistor,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,质量流量60～330 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τR＜10 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。
Experiments have been carried out to study the heat transfer characteristics of a liquid-cooling plate with parallel micro flow channels under several off-design conditions including transient start/stop,fluid flux fluctuating and different flow channel blockages.The effects of the above conditions on the IGBT surface temperature and the cooling effect have been investigated under a range of flow rates from 60 kg/h to 330 kg/h.It is revealed that it is dangerous for the cooling system operating under high heat fluxes during start/stop if the Respond Time （τR）is less than 10 seconds.The effect of fluid flux fluctuating on the IGBT surface temperature is significant when the average Nusselt Number is smaller.It is also found that partial flow channel blockage cannot result in a significant temperature rise.
出处
《热科学与技术》
CAS
CSCD
北大核心
2014年第4期352-358,共7页
Journal of Thermal Science and Technology
基金
国家高技术研究发展计划(863计划)资助项目(2012AA050401)
山东省博士后创新项目专项资金资助项目(201101006)
关键词
水冷基板
瞬态特性
变工况运行
热流密度
绝缘栅双极晶体管
liquid cold plate
transient characteristic
variable conditions
heat flux
insulated gate bipolar transistor,IGBT
