E_cell 0.7[V] "Cell voltage"
sigmal_mem 10[S/m] "Membrane electrolyte conductivity"
log10_i0_ref_ORR -3 "Log of ORR reference exchange current density (fitting parameter)"
alphac_ORR log(10)*R_const*T/(100[mV]*F_const) "Cathodic transfer coefficient, oxygen reduction"
ilim_ORR_ref 3000[A/m^2] "Limiting current density for oxygen reduction at 1 atm partial pressure"
H_gdl 150[um] "GDL thickness"
H_ct 8[um] "Catalytic layer thickness"
H_mem 9[um] "Membrane thickness"
W_ch 1[mm] "Channel width"
W_rib 1[mm] "Rib width"
W_cell (W_ch+W_rib)/2 "Computational cell width"
H_cell 2*H_gdl+H_mem+2*H_ct "Computational cell height"
T 100[degC] "Cell operating temperature"
RH 70[%] "Relative humidity of inlet gases"
xN2 79[%] "Dry nitrogen molar fraction"
sigmas_ct 50[S/m] "Electric conductivity of catalytic layer"
sigmas_gdl_TP 70[S/m] "Electric through-plane conductivity of gdl"
sigmas_gdl_IP 5000[S/m] "Electric in-plane conductivity of gdl"
epsg_ct 0.3 "Gas pore volume fraction in catalytic layer"
epsg_gdl 0.7 "Gas pore volume fraction in gdl"
epsl_ct 0.3 "Electrolyte volume fraction in catalytic layer"
perm_ct 1e-12[m^2] "Hydraulic permeability of catalytic layer"
perm_gdl 1e-10[m^2] "Hydraulic permeability of gdl"
alphaa_ORR 4-alphac_ORR "Anodic transfer coefficient, oxygen reduction"
E_init 0.8[V] "Initial cell voltage"
sigmal_ct 0.5[S/m] "Effective electrolyte conductivity in catalytic layer"
i0_ref_ORR 10^log10_i0_ref_ORR[A/m^2] "Reference exchange current density, oxygen reduction"
Av_ORR 1.7e7[m^2/m^3] "Specific surface area, oxygen reduction"
i0_ref_HOR 100[A/m^2] "Reference exchange current density, hydrogen oxidation"
Av_HOR 7.1e6[m^2/m^3] "Specific surface area, hydrogen oxidation"
perm_H2 8.2E-14[s*mol/kg] "Hydrogen membrane permeability"