OPEM Report (Padulles-II Model)

What is Padulles-II ?

In this model, Nernst and fuel cell potential were modeled as a function of water, oxygen and hydrogen gases partial pressure that can be calculated from independent variables or constants. The partial pressure of gases is proportional to the molar flow of each gas.


Input Description Value
B Activation voltage constant [V] 0.04777
C Activation constant parameter [A^(-1)] 0.0136
E0 No load voltage [V] 0.6
KH2 Hydrogen valve constant [kmol.s^(-1).atm^(-1)] 4.22e-05
KH2O Water Valve Constant [kmol.s^(-1).atm^(-1)] 7.716e-06
KO2 Oxygen valve constant [kmol.s^(-1).atm^(-1)] 2.11e-05
N0 Number of cells 5
Rint Fuel cell internal resistance [ohm] 0.00303
T Fuel cell temperature [K] 343
i-start Cell operating current start point [A] 0.1
i-step Cell operating current step 0.1
i-stop Cell operating current end point [A] 100
qH2 Molar flow of hydrogen [kmol.s^(-1)] 0.0004
rho Hydrogen-Oxygen flow rate 1.168
tH2 Hydrogen time constant [s] 3.37
tH2O Water time constant [s] 18.418
tO2 Oxygen time constant [s] 6.74

Overall Parameters

Parameter Description Value
Efficiency|Pmax Cell efficiency at maximum power 0.345453171605978
Pmax Maximum power [W] 269.1840203788102
Ptotal(Elec) Total electrical power [W] 288.7454858282187
Ptotal(Thermal) Total thermal power [W] 325.0245141717815
VFC|Pmax Cell voltage at maximum power [V] 2.6945347385266287


Parameter Description Value
K Slope of the curve obtained by linear approximation [A^(-1)] -0.004456243154863302
Pmax(L-Approx) Maximum power obtained by linear approximation [W] 544.7719451780384
V0 Intercept of the curve obtained by linear approximation [V] 3.1161747394273
VFC|Pmax(L-Approx) Cell voltage at maximum power obtained by linear approximation [V] 1.55808736971365

Generated By OPEM Version 1.3