Comparison of Isobaric and Non-isobaric Operations on a Two-Phase Dynamic Model for PEFC Cathode Gas Diffusion Layer  

作　　者：纪光霁 陈翌 周苏 陈凤祥 

机构地区：[1]School of Automotive Studies,Tongji University [2]Chinesisch-Deutsche Hochschulkolleg,Tongji University

出　　处：《Journal of Donghua University(English Edition)》2011年第6期539-546,共8页东华大学学报（英文版）

基　　金：National High Technology Reseach & Development Program of High Temperature PEM Fuel Cell,China (863 Program,No. 2008AA050403);Shanghai Pujiang Talent Plan,China (No. 08PJ1409);Chinese 111-Program for Energy-Saving and Environment-Friendly Automotives (No. B08019)

摘　　要：Key words,： Two 1-D dynamical and isothermal models of cathode gas diffusion layer（GDL） with isobaric and non-isobaric operations for polymer electrolyte fuel cells（PEFCs） were developed and implemented in COMSOL Multiphysics v3.5.The artificial diffusion coefficient was introduced as well to make the numerical computation be stable.In the non-isobaric model,the pressure of gas mixture was obtained by summing up the governing equations of gaseous components,instead of Navier-Stoks equation.Comparison of the two models were carried out with the steady-states and dynamical simulations under given conditions.The corresponding analysis based on the simulated results was also given simultaneously.This paper is contributed to finding the differences between the isobaric and non-isobaric operation in the two-phase model of cathode GDL.Two 1-D dynamical and isothermal models of cathode gas diffusion layer(GDL) with isobaric and non-isobaric operations for polymer electrolyte fuel cells(PEFCs) were developed and implemented in COMSOL Multiphysics v3.5.The artificial diffusion coefficient was introduced as well to make the numerical computation be stable.In the non-isobaric model,the pressure of gas mixture was obtained by summing up the governing equations of gaseous components,instead of Navier-Stoks equation.Comparison of the two models were carried out with the steady-states and dynamical simulations under given conditions.The corresponding analysis based on the simulated results was also given simultaneously.This paper is contributed to finding the differences between the isobaric and non-isobaric operation in the two-phase model of cathode GDL.

关 键 词：TWO-PHASE model gas diffusion layer(GDL) ISOBARIC and non-isobaric operations polymer electrolyte fuel cell(PEFC) 

分 类 号：TK91[动力工程及工程热物理]