质子交换膜燃料电池随行波流场设计与传质特性  

Structural design and mass-transfer performances of a proton exchange membrane fuel cell with a traveling-wave flow-field

作　　者：朱鑫宁 王茜[1] 刘荣康 朱思明 张剑波[2] 周伟[1] ZHU Xinning;WANG Xi;LIU Rongkang;ZHU Siming;ZHANG Jianbo;ZHOU Wei(Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361100,China;State Key Laboratory of Intelligent Green Vehicle and Mobility(Former:State Key Laboratory of Automotive Safety and Energy),Tsinghua University,Beijing 100084,China)

机构地区：[1]厦门大学萨本栋微米纳米技术研究院,厦门361105 [2]清华大学,智能绿色车辆与交通全国重点实验室(原汽车安全与节能国家重点实验室),北京100084

出　　处：《汽车安全与节能学报》2024年第3期351-359,共9页Journal of Automotive Safety and Energy

基　　金：汽车安全与节能国家重点实验室开放基金资助项目(KFY2225)。

摘　　要：为了提高质子交换膜燃料电池(PEMFC)的膜电极的传质性能与电池的功率密度,设计了一种以圆弧凹面作为强化传质结构的随行波流场板。结合铣削工艺,实现了随行波流场结构的制造。采用计算流体动力学软件,建立包括随行波流场与膜电极在内的燃料电池三维模型。实验验证了该模型的准确性。探索了强化传质结构对电池内部速度场、浓度场及电场的分布规律,分析了电池性能的提升效果。结果表明:与流道深宽0.6 mm×0.8 mm的常规流场相比,该文的随行波流场的平均流速提升了27.7%,压损降低了19.2%,双极板—气体扩散层界面的氧气含量提升了1.44%,出口的排水速率增大16.7%,功率密度提升了8.6%。A traveling-wave flow-field plate with an arc concave surface was designed as an enhanced mass transfer structure to improve the mass transfer performances of the membrane electrode assembly(MEA)and to improve the power density of proton exchange membrane fuel cells(PEMFC).By combining milling technology,the manufacturing of traveling wave flow field structures has been achieved.Using computational fluid dynamics software,a three-dimensional model of the PEMFC was established,including the traveling wave flow field and MEA.The accuracy of the model was experimentally verified.Explored the distribution pattern of enhanced mass transfer structure on the internal velocity field,concentration field,and electric field of PEMFC,and analyzed the improvement effect of PEMFC performance.The results showed that compared with the conventional flow field with a channel 0.6 mm depth and 0.8 mm width,the average flow velocity of the traveling wave flow field in this article increased by 27.7%,the pressure loss decreased by 19.2%,the oxygen content at the interface between the flow field plate and MEA increased by 1.44%, the drainage rate at the outlet increased by 16.7%, and the power density increased by 8.6%.

关 键 词：质子交换膜燃料电池(PEMFC) 随行波流场 传质性能 功率密度 

分 类 号：U469.7[机械工程—车辆工程]