Welcome to Journal of Automotive Safety and Energy,
汽车安全与节能学报

Journal Of Automotive Safety And Energy ›› 2019, Vol. 10 ›› Issue (1): 95-100.DOI: 10.3969/j.issn.1674-8484.2019.01.012

• Automotive Energy Efficiency & Environment Protection • Previous Articles     Next Articles

Asymptotic analysis of the effect of anode relative humidity on anode pressure drop of proton exchange membrane fuel cell

LIU Yongfeng1,2 , BAI Shijie1, PEI Pucheng2, YAO Shengzhuo1, JIN Taotao1   

  1. (1. Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles, School of Machine-electricity and vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044，China ；2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084，China)
  • Received:2018-09-17 Online:2019-03-31 Published:2019-04-01

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Abstract:

A model of anode relative humidity – pressure drop (RHPD) was established to explain the relationship between anode relative humidity and anode pressure drop, which based on the same principle of gas molar ratio and local pressure ratio, and considered the influence of the molar flow rate of anode water
vapor and the water flux of the proton exchange membrane on the anode pressure drop. The RHPD model was imported into FLUENT by user– defined function (UDF) for simulation. A self-developed PEMFC test stand was carried out under working temperature of 60 ℃, cathode relative humidity of 25 %, anode relative humidity of 25 %~75%, respectively. The test results were compared with those of the simulation and the differences were analyzed. The results show that the anode pressure drop decreases with the increase of anode relative humidity, and there is only 0.19 % difference between RHPD model and the experimental data when the anode relative humidity and the cathode relative humidity is respectively 25 % and 75 % at 70 s.

Key words: proton exchange membrane fuel cells (PEMFC) , anode pressure drop ,  relative humidity , asymptotic analysis