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Molten carbonate Fuel Cell Dynamical Modelling

pubblicazioni - Articolo

Molten carbonate Fuel Cell Dynamical Modelling

The aim of this work is to build up a complete dynamical model of a Molten Carbonate Fuel Cell (MCFC) stack, describing both the thermo- fluid-dynamical and the electrochemical phenomena involved, i.e. both slow and (relatively) fast dynamics. Following a first-principle approach, a set of dif-ferential and algebraic equations is written, based on mass, momentum, energy and charge balance referred to small control volumes inside a cell.

The outlined two-three-dimensional description takes into account the strong point-to-point anode and cathode reaction coupling due to gas cross-flow. Simulations (carried out after suitable thermodynamical and electrochemical parameter tuning) highlight, for instance, the presence of dynamics, linked to the electrochemical behaviour, with time constants on the order of a second; besides, rather fair matching to data which can be found in the literature is achieved, in terms of external potential difference and of electric power production. The obtained numerical results, therefore, support model correctness and relia-bility. This is useful in view of model-based cell operation analysis and control, both in stationary and in transient conditions.

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