| 초록 |
A mathematical model for PEMFC simulation was developed and improved in order to analyze physical and electrochemical phenomena using Computational Fluid Dynamics(CFD) technique. In this model, momentum conservation equation, speceis transport euquation(H2, O2, N2, H2O_vap., water content) and charge conservation equation are solved simultaneously.In this study, we mainly focus on physical and electrochemical behavior in PEMFC system in accordance with its various operating condtions; (i) H2, O2, H2O_vap. distribution and their effects on electrochemical reaction in anode and cathode catalyst layer (ii) water content and proton conductivity distribution and their effects on current density distribution in MEA (iii) EOD(Electro Osmotic Drag) effect on water profile in MEA (iv) prediction of polarization curve and cell efficiency based on various operating conditions. |
