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汽车安全与节能学报

JASE ›› 2019, Vol. 10 ›› Issue (1): 95-100.DOI: 10.3969/j.issn.1674-8484.2019.01.012

• 汽车节能与环保 • 上一篇    下一篇

质子交换膜燃料电池阳极相对湿度对压力降影响的渐近分析

刘永峰1,2，白世杰1，裴普成2，姚圣卓1，金涛涛1   

  1. （1. 城市轨道交通车辆服役性能保障北京市重点试验室，北京建筑大学 机电与车辆工程学院，北京 100044，中国；2. 汽车安全与节能国家重点试验室，清华大学，北京 100084，中国）
  • 收稿日期:2018-09-17 出版日期:2019-03-31 发布日期:2019-04-01
  • 作者简介:第一作者 / First author ： 刘永峰(1973—)，男( 汉)，山西，教授。E-mail: liuyongfeng@bucea.edu.cn。
  • 基金资助:

    汽车安全与节能国家重点实验室开放基金（KF1825）；国家重点研发计划项目（2017YFB0102705，2016YFB0101305）；国家自然科学基金项目(21676158) ；北京建筑大学市属高校基本科研业务费专项资金（X18083）。

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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摘要：

        阐述了质子交换膜燃料电池（PEMFC）阳极相对湿度和阳极压力降之间的关系。根据PEMFC实际尺寸，运用气体摩尔比与局部压力比相同的原理，考虑了阳极水蒸气的摩尔流率和质子交换膜的水通率对阳极压力降的影响，建立了阳极相对湿度– 压力降（RHPD）模型，并通过自定义函数将其导入软件FLUENT 中进行仿真。在PEMFC 工作温度为60℃、阴极相对湿度为25%、阳极相对湿度25%~75%的工况下进行试验并与仿真结果比较，进行渐进分析。结果表明：阳极压力降随着阳极相对湿度的增加而减小；当阴极和阳极相对湿度分别为25% 和75%，相变阶段时间为70 s 时，仿真值和试验值相对误差最小值为0.19%。

关键词: 质子交换膜燃料电池 (PEMFC) , 阳极压力降 , 相对湿度 , 渐进分析

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