V_cell 0.7[V] "Cell voltage"
T 353[K] "Temperature"
kappa_s 1000[S/m] "Conductivity, solid phase"
kappa_p 1e-13[m^2] GDL permeability
tortx 1.1 "Tortuosity, x direction"
torty 2.8 "Tortuosity, y direction"
p_ref 1[atm] "Reference pressure"
p_a_in p_ref+25[mbar] "Anode inlet pressure"
p_c_in p_ref+50[mbar] "Cathode inlet pressure"
E_eq_a 0[V] "Equilibrium potential, anode"
E_eq_c 1[V] "Equilibrium potential, cathode"
i0_a 1e5[A/m^2] "Exchange current density, anode"
i0_c 1[A/m^2] "Exchange current density, cathode"
eps_mic 0.2 "Microscopic porosity inside agglomerates"
eps_mac 0.4 "Macroscopic porosity between agglomerates"
S 1e7[m^2/m^3] "Specific surface area, agglomerate"
R_agg 0.1[um] "Agglomerate radius"
l_act 10[um] "Active GDE layer thickness"
D_agg 1.2e-10[m^2/s]*((1-eps_mac)*eps_mic)^1.5 "Effective diffusion coefficient inside agglomerates"
K -6*F_const*D_agg/R_agg^2 "Agglomerate current density subexpression"
Av 3*(1-eps_mac)/R_agg "Specific surface area, GDE"
xH2Oa_in 0.42 "Inlet molar fraction, H2O"
xH2_in 1-xH2Oa_in "Inlet molar fraction, H2"
xH2Oc_in 0.42 "Inlet molar fraction, H2O"
xO2_in 0.21*(1-xH2Oc_in) "Inlet molar fraction, O2"
xN2_in 0.79*(1-xH2Oc_in) "Inlet molar fraction, N2"
KH2 3.9e4[Pa*m^3/mol] "Henry's law constant, H2 in agglomerate"
KO2 3.2e4[Pa*m^3/mol] "Henry's law constant, O2 in agglomerate"
cH2_ref xH2_in*p_ref/KH2 "Reference concentration, H2"
cO2_ref xO2_in*p_ref/KO2 "Reference concentration, O2"