Distributions of temperature and water in the gas diffusion layers of the polymer electrolyte membrane fuel cell
One-dimensional nonisothermal model of the polymer electrolyte membrane fuel cell (PEFC) was proposed. The energy transport and the mass transport of hydrogen, oxygen, steam, water, sorbed water, proton, and electron, in the direction across the membrane and gas diffusion layers (GDLs) were taken into account. The numerical simulation showed a remarkable temperature gradient in the GDLs is required for emitting the considerable heat of reaction. This increases the electrode surface temperature by several degrees Celcius. The effective thermal conductivity of the GDL mostly affects the electrode temperature. The increase in temperature affects the saturated steam pressure greatly, which enhances the steam diffusion in the cathode side GDL and suppresses that in the anode side GDL. Where the measured total water flux is higher than the estimated steam flux, a part of water should be transported in the liquid state.
Polymer electrolyte membrane fuel cell Nonisothermal model Electrode temperature Effective thermal conductivity
Motoaki Kawase Hiroaki Takesue Kouichi Miura
Department of Chemical Engineering, Kyoto University Kyotodaigaku-Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）