用于燃料电池散热系统的板翅式换热器的传热特性数值模拟  

Numerical Simulation of Heat Transfer Characteristics of Plate Fin Heat Exchangers for Fuel Cell Cooling Systems

作　　者：柴文杰 靳惠明[1] 许镒濠 CHAI Wenjie;JIN Huiming;XU Yihao(School of Mechanical Engineering,Yangzhou University,Yangzhou 225127)

机构地区：[1]扬州大学机械工程学院,扬州225127

出　　处：《现代制造技术与装备》2023年第9期161-164,共4页Modern Manufacturing Technology and Equipment

摘　　要：为促进板翅式换热器在燃料电池领域的开发与使用,对板翅式换热器空气侧锯齿翅片的换热与流动性能进行计算流体力学(Computational Fluid Dynamics,CFD)数值模拟,运用单一变量法分析翅高、节距、厚度对翅片的换热与流动性能的影响。结果表明:在研究的结构参数范围内,翅片高度的减小一定程度上会增强换热,翅高对压降影响不大,综合考虑最佳翅高为7 mm;节距的减小会引起换热平稳增强,同时阻力大幅提高,节距2 mm为综合最佳;翅厚的增大能有效提高换热能力,但是阻力也会大幅提高,厚度0.2 mm为最佳。In order to promote the development and application of plate-fin heat exchanger in the field of fuel cell,the heat exchange and flow performance of the air side sawtooth fin of plate-fin heat exchanger are simulated by Computational Fluid Dynamics(CFD).The influence of fin height,pitch and thickness on heat transfer and flow performance of fin was analyzed by single variable method.It is concluded that the decrease of fin height will enhance heat transfer to some extent,and the fin height has little effect on pressure drop.The optimum fin height is 7 mm.The decrease of pitch will cause the heat transfer to increase steadily and the resistance to increase significantly,and the pitch of 2 mm is the best overall.The increase of wing thickness can effectively improve the heat transfer capacity,but the resistance will also be greatly increased,and the thickness of 0.2 mm is the best.

关 键 词：板翅式换热器 燃料电池 计算流体力学(CFD) 锯齿形翅片 数值模拟 

分 类 号：TK172[动力工程及工程热物理—热能工程] TM911.4[电气工程—电力电子与电力传动]