L 0.02[m] Cell length H_ch 1e-3[m] Channel height W_ch 0.7874e-3[m] Channel width W_rib 0.90932e-3[m] Rib width H_gdl 380e-6[m] GDL width H_electrode 50e-6[m] Porous electrode thickness H_membrane 100e-6[m] Membrane thickness eps_gdl 0.4 GDL porosity kappa_gdl 1.18e-11[m^2] GDL permeability sigma_gdl 222[S/m] GDL electric conductivity wH2_in 0.743 Inlet H2 mass fraction (anode) wH2O_in 0.023 Inlet H2O mass fraction (cathode) wO2_in 0.228 Inlet oxygen mass fraction (cathode) U_in_anode 0.2[m/s] Anode inlet flow velocity U_in_cathode 0.5[m/s] mu_anode 1.19e-5[Pa*s] Anode viscocity mu_cathode 2.46e-5[Pa*s] Cathode viscocity MH2 0.002[kg/mol] Hydrogen molar mass MN2 0.028[kg/mol] Nitrogen molar mass MH2O 0.018[kg/mol] Water molar mass MO2 0.032[kg/mol] Oxygen molar mass D_H2_H2O 9.15e-5*(T/307.1[K])^1.75[m^2/s] H2-H2O Binary diffusion coefficient D_N2_H2O 2.56e-5*(T/307.15[K])^1.75[m^2/s] N2-H2O Binary diffusion coefficient D_O2_N2 2.2e-5*(T/293.2[K])^1.75[m^2/s] O2-N2 binary diffusion coefficient D_O2_H2O 2.82e-5*(T/308.1[K])^1.75[m^2/s] O2-H2O binary diffusion coefficient T 180+273.15[K] Cell temperature p_ref 101e3[Pa] Reference pressure V_cell 0.9 Cell voltage cO2_ref 40.88[mol/m^3] Oxygen reference concentration cH2_ref 40.88[mol/m^3] Hydrogen reference concentration eps_l 0.3 eps_cl 1-eps_l-eps_gdl Open volume fraction for gas diffusion in porous electrodes kappa_cl kappa_gdl/5 Permeability (porous electrode) sigma_m 9.825[S/m] Membrane conductivity