Padulles-Hauer Dynamic Model is a dynamic electrochemical simulation model of a grid independent proton exchange membrane (PEM) fuel cell. This model includes a methanol reformer to generate hydrogen from methanol and the PEM stack. The model is used to predict the output voltage and power of a PEMFC. It has to be noted that the reformer model is a second order transfer function.

Input | Description | Value |

B | Activation voltage constant [V] | 0.04777 |

C | Activation constant parameter [A^(-1)] | 0.0136 |

CV | Conversion factor | 2 |

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 |

qMethanol | Molar flow of methanol [kmol.s^(-1)] | 0.0002 |

rho | Hydrogen-Oxygen flow rate | 1.168 |

t1 | Reformer time constant [s] | 2 |

t2 | Reformer time constant [s] | 2 |

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 | 0.3339116037981434 |

Pmax | Maximum power [W] | 260.19059991158935 |

Ptotal(Elec) | Total electrical power [W] | 279.8328477108543 |

Ptotal(Thermal) | Total thermal power [W] | 333.93715228914607 |

VFC|Pmax | Cell voltage at maximum power [V] | 2.6045105096255186 |

Parameter | Description | Value |

K | Slope of the curve obtained by linear approximation [A^(-1)] | -0.0044705456629812465 |

Pmax(L-Approx) | Maximum power obtained by linear approximation [W] | 512.5923558882793 |

V0 | Intercept of the curve obtained by linear approximation [V] | 3.027584868170461 |

VFC|Pmax(L-Approx) | Cell voltage at maximum power obtained by linear approximation [V] | 1.5137924340852305 |

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