摘要
运用CFD软件模拟分析了10种不同变截面流道质子交换膜燃料电池(PEMFC)的性能,在相同操作条件下,对比分析了10种流道的压力分布特性、水分布特性、气体分布特性及电化学特性,详细说明了各性能随流道截面结构变化的规律。由模拟结果分析得出,V型变截面流道的各方面性能最优,其能够保证合理的压降、有效地排出反应生成的液态水、使气体更加均匀地分布于扩散层,从而保证了PEMFC性能的提升。此外,V型变截面流道PEMFC的最大功率密度比正常截面PEMFC提高了12.2%。模拟结果对PEMFC流道的设计与优化具有一定的指导意义。
The performance of 10 kinds of proton exchange membrane fuel cells(PEMFC)with different cross sections was simulated and analyzed by CFD software.Under the same operating conditions,the pressure distribution characteristics,water distribution characteristics,gas distribution characteristics and electrochemical characteristics of 10 kinds of channels were compared and analyzed,and the variation of each performance with the cross section structure of the channel was explained in detail.Simulation results show that the V-channel has the best performance in all aspects,which can ensure reasonable pressure drop,effectively discharge the liquid water generated by the reaction,and make the gas more evenly distributed in the diffusion layer,thus ensuring the improvement of the performance of PEMFC.In addition,The maximum power density of V-channel PEMFC is 12.2%higher than that of normal cross section PEMFC.The simulation results have certain guiding significance for the design and optimization of PEMFC channel.
作者
曹爱红
赵保华
CAO Ai-hong;ZHAO Bao-hua(Shandong Labor Vocational and Technical college,Jinan Shandong 250022,China;Jinan University,Jinan Shandong 250024,China)
出处
《电源技术》
CAS
北大核心
2020年第7期976-979,共4页
Chinese Journal of Power Sources
基金
2019年度中国职协研究课题(2019114)。
关键词
变截面流道
PEMFC
压力分布特性
水分布特性
气体分布特性
电化学特性
variable cross-section flow channel
PEMFC
pressure distribution characteristic
water distribution characteristic
gas distribution characteristic
electrochemical property
