alphaa_ORR 4-alphac_ORR "Anodic transfer coefficient, oxygen reduction"
alphac_ORR 1 "Cathodic transfer coefficient, oxygen reduction"
Av_HOR 1e7[m^2/m^3] "Specific surface area, hydrogen oxidation"
Av_ORR 1e7[m^2/m^3] "Specific surface area, oxygen reduction"
i0_ref_HOR 100[A/m^2] "Reference exchange current density, hydrogen oxidation"
i0_ref_ORR 1e-4[A/m^2] "Reference exchange current density, oxygen reduction"
perm_gdl 1e-11[m^2] "Hydraulic permeability of gdl"
por_gdl 0.7 "Gas pore volume fraction in gdl"
RH 100[%] "Relative humidity of inlet gases"
sigmas_gdl_IP 5000[S/m] "Electric in-plane conductivity of gdl"
sigmas_gdl_TP 70[S/m] "Electric through-plane conductivity of gdl"
D_eddy 1e-5[m^2/s] "Two-phase eddy diffusivity in channels"
T 70[degC] "Cell operating temperature"
H_cl 8[um] "Catalytic layer (GDE) thickness"
I_avg_cell 1[A/cm^2] "Average cell current density"
A_cell H_act*W_act "Cell area"
I_cell I_avg_cell*A_cell "Cell current"
p_BC 0.075[bar] "Brooks-Corey entry pressure"
lambda_BC 3 "Brooks-Corey parameter"
sw_res_100_aw 1e-3 "Residual saturation at 100% relative humidity"
kw 100000[mol/(m^3*s)] "Condensation rate constant"
M_O2 32[g/mol]*I_cell/(4*F_const) "Oxygen mass consumption in cell"
M_H2 2[g/mol]*I_cell/(2*F_const) "Hydrogen mass consumption in cell"
stoich_cath 2.5 "Oxygen stoichiometry"
stoich_an 2 "Hydrogen stoichiometry"
wO2_in 0.18 "Oxygen mass fraction at inlet"
wH2_in 0.2 "Hydrogen mass fraction at inlet"
M_an stoich_an*M_H2/wH2_in "Mass flow rate at anode inlet"
M_cath stoich_cath*M_O2/wO2_in "Mass flow rate at cathode inlet"