纯电动车电池冷却用板式蒸发器性能仿真及实验验证.pdf

纯电动车电池冷却用板式蒸发器性能仿真及实验验证 1 1 2 3 田镇 ，谷波 ，杨林 ，卢冶 （1.上海交通大学 制冷与低温工程研究所，上海 200240 ；2.上海交通大学，汽车电子研究所，上海 200240 ； 3.上海汽车新能源和技术管理部，上海 201805 ） 摘要 用于纯电动汽车（Electric Vehicle, EV ）动力电池模块（Power Battery Unit, PBU ）冷却 的板式蒸发器涉及制冷剂与冷却液的板间换热。基于单相区、两相流区、过热区的换热和压 降关联式以及 R134a 物性、冷却液物性建立了板式蒸发器的稳态分布参数模型。模型预测 结果与实验数据对比表明，换热量的相对误差在±11%以内，压降的相对误差在±10%以内， 制冷剂质量流量的相对误差在±6%以内。通过模型预测了4 种冷却液流量下，制冷剂换热系 数、壁温及压降沿板长方向的分布；此外，分析了各流量下板式蒸发器的换热量和压降的相 对增长 ，为板式蒸发器的优化设计提供了基础。 关键词 板式蒸发器 电池冷却 分布参数模型 性能分析 NUMERICAL SIMULATION AND EXPERIMENTAL VALIDATION OF A PLATE EVAPORAOR USED FOR ELECTRIC VEHICLE BATTERY COOLING 1 1 2 3 Tian Zhen , Gu Bo , Yang Lin , Lu Ye (1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240; 2. Institute of Automotive Electronics, Shanghai Jiao Tong University, Shanghai, 200240; 3. Department of New Energy Vehicle and Technique, SAIC Motor Corporation, Shanghai 201805) Abstract The plate-type evaporator used for cooling the Power Battery Unit (PBU) in the Electric Vehicle (EV) refers to the heat exchange between the refrigerant and the coolant. The steady-state Distribution Parameter Model (DPM) for the plate-type evaporator was built on the basis of heat transfer coefficient and pressure drop correlations in single-phase region, two-phase region and superheated region, the thermodynamic properties of R134a and coolant. Compared to the experimental data, the DPM showed good prediction results. The mean relative errors between the experimental data and the DPM prediction data are within ±11%, ±10% and ±6% for the heat exchange capacity, pressure drop and refrigerant mass flow rate, respectively. The refrig