A_cell 3.2*3.2[cm^2] "Cell area"
H_cell A_cell/D_cell "Cell height"
D_cell 3.2[cm] "Cell depth (out of plane)"
W_cf 3[mm] "Carbon felt width"
W_sep 1[mm] "Separator width"
W_cell W_cf*2+W_sep "Cell width"
U 20[ml/min]/(D_cell*W_cf) "Flow velocity"
epsl_cf 0.5 "Carbon felt porosity"
epsl_sep 0.5 "Separator porosity"
sigmas_cf 100[S/m] "Electric conductivity, carbon felt"
sigmal 100[S/m] "Electrolyte conductivity"
T 293.15[K] Temperature
c0_Br2 1e-6[M] "Initial concentration of Br2 for initial voltage estimation"
c0_Br_m 6[M] "Bromide ion concentration"
c0_Zn_2p 4[M] "Zinc ion concentration"
Eeq_ref_Zn -0.76[V]+R_const*T/(2*F_const)*log(c0_Zn_2p/1[M]) "Negative reference equilibrium potential"
Eeq_ref_Br 1.09[V]+R_const*T/(2*F_const)*log((1[M]/c0_Br_m)^2) "Positive reference equilibrium potential"
E_cell_init Eeq_ref_Br-Eeq_ref_Zn+R_const*T/(2*F_const)*log(c0_Br2/1[M]) "Initial cell voltage"
D_Br2 1.31e-9[m^2/s] "Bromine complex diffusivity"
i0_ref_Br 0.1[A/m^2]*(c0_Br_m/1[M])^(2-alpha_a_Br) "Exchange current density, bromine reaction"
i0_ref_Zn 10[A/m^2]*(c0_Zn_2p/1[M])^((alpha_a_Zn)/2) "Exchange current density, zinc reaction"
Av_cf 1e4[m^2/m^3] "Active surface area, carbon felt"
alpha_a_Br 1 "Transfer coefficient, bromine reaction"
alpha_a_Zn 0.5 "Transfer coefficient, zinc reaction"
V_res 80[cm^3] "Reservoir (tank) volume"
M_Zn 65.39[g/mol] "Molar mass of Zn"
rho_Zn 7133[kg/m^3] "Density of Zn(s)"
t_charge 1800[s] "Charging time"
i_app 40[mA/cm^2] "Applied current density"