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A reduced fuel cell stack model is proposed for control and fault diagnosis, validated with experimental data, and includes electro-chemical, electrical, and thermal models.

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System
MEC

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Abstract

This paper proposes a reduced fuel cell stack model for control and fault diagnosis which was validated with experimental data. Firstly, the electro-chemical phenomena are modeled based on a mechanism of gas adsorption/desorption on catalysts at the anode and at the cathode of the stack, including activation, diffusion, and carbon monoxide poisoning. The electrical voltage of a stack cell is then modeled by the difference between the two electrode potentials. A simplified thermal model of the fuel cell stack is also developed in order to take into account heat generation from reactions, heat transfers, and evaporation/condensation of water. Finally, the efficiency ratio is computed as a model output. It is used to evaluate the efficiency changes of the entire system, providing an important indicator for fault detection.

Key findings

  • The model accounts for gas adsorption/desorption, activation, diffusion, and carbon monoxide poisoning at anode and cathode.
  • The electrical voltage is modeled by the difference between electrode potentials.
  • A simplified thermal model considers heat generation, transfers, and water evaporation/condensation.

Keywords

Stack (abstract data type)AnodeCathodeNuclear engineeringFault (geology)Carbon monoxide

Identifiers

Journal
Journal of Fuel Cell Science and Technology
Year
2006