Zero-Order Fuel Cell Analysis Model

1 Zero-Order Fuel Cell Analysis Model 

In a zero-order model, transport equations for gas concentration and temperature are not considered and performance characteristic in terms of voltage-current polarization is derived on the basis of the reversible open circuit 

Eg = Open circuit voltage given by the Nernst Equation (Equation 4.49) as 

Erev(T) = reversible voltage at a temperature, T Ti, t = activation losses for electrode kinetics 

Activation loss is given by the Butler-Volmer equation (Equation 7.19) or by the Tafel equation with empirical constants obtained on the basis of the fit of experimental data. For anode and cathode electrodes, the Butler-Volmer equation (Equation 7.19b) is written as 

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