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 |

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 |

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