燃料电池汽车动力控制模块水冷冷板的性能仿真及评估  

Performance Analysis and Evaluation for the Liquid Cooling Plate of PCU in FCV

作　　者：王婷[1] 谷波[1] 赵鹏程 张萍[1] 

机构地区：[1]上海交通大学制冷及低温研究所,上海200240 [2]上海汽车集团新能源和技术管理部,上海201805

出　　处：《机械工程学报》2013年第18期150-158,166,共10页Journal of Mechanical Engineering

基　　金：国家科技支撑计划资助项目(2013BAG03B01)

摘　　要：针对燃料电池汽车(Fuel cell vehicle,FCV)动力控制模块(Power control unit,PCU)的液冷冷板,提出15种改进结构方案。这些方案在冷板的3个高热流密度区域A、B、C中,布置不同直径、高度以及肋柱间距的圆形或椭圆形扰流阵列,以期在尽量小的流动损失下,增强换热性能,降低冷板温度。为研究不同强化结构对3个散热区及冷板整体流动和换热性能的影响,本文对无肋柱,光滑通道的方案0以及15种改进方案进行数值模拟。在此基础上,以方案0为参考对象,运用换热强度和压降涨幅,分别表示改进方案的换热强化、压降升高程度。引入性能评估系数PEF,用以评比各个方案的流动、换热综合性能。评价结果表明,在相同的热负荷,入口流速和入口温度下,在散热区A,方案15具有最佳的传热流动综合性能;在散热区B和C,方案12表现了最好的综合冷却效果。考虑到冷板整体的壁面温度、传热效果及流动损失,PCU冷却的最佳选择为方案12。In pursuit of thermal control of the power control unit （PCU） for fuel cell vehicle （FCV）, pin fin arrays are arranged at three high heat flux zones of the channel in the liquid-cooled cooling plate. In order to check the impact of fin configurations （such as diameter, height, fin pitch and shape） on the pressure drop and heat transfer capabilities, fifteen structure schemes are proposed and numerically investigated based on the same setup and boundary conditions. Details of flow and temperature distributions for each scheme at three high heat flux zones are obtained. References to evaluate the heat transfer enhancement （HTE） effectiveness and pressure drop augmentation of the fifteen schemes, contrast to scheme 0 of baseline channel without fin arrays, are respectively quantified as heat transfer intensity, a and pressure drop increment, ft. A performance evaluation factor （PEF） is proposed to assess the overall performance including heat transfer and pressure drop of cold plates with various the pin fin arrays. Thus, at high heat flux zone A, the best overall performance is provided by scheme 15 with elliptic fins. At the other two zones, scheme 12 performed better than the other schemes. All in all, scheme 12, with the biggest PEF among those of the fifteen schemes, is selected as the solution for the PCU＇s cold plate.

关 键 词：动力控制模块 冷板 强化换热 液冷 

分 类 号：TB65[一般工业技术—制冷工程]