Authors: Verhaert, Ivan
Verhelst, Sebastian
Janssen, Griet
De Paepe, Michel
Mulder, Grietus
Issue Date: 1-Aug-2011
Publisher: Ghent University, Departement of flow, heat and combustion mechanics
Host Document: 8th international conference on heat transfer, fluid mechanics and thermodynamics, Proceedings pages:586-593
Conference: HEFAT 2011, international conference on heat transfer, fluid mechanics and thermodynamics edition:8th location:Pointe Aux Piments, Mauritius date:11-13 july 2011
Abstract: Alkaline fuel cells are low temperature fuel cells for which stationary applications, like cogeneration in buildings, are a promising market. To guarantee a long life, water and thermal management has to be controlled in a careful way. To understand the water, alkali and thermal flows, a two-dimensional model for an alkaline fuel cell module is developed using a control volume approach. Special attention is given to the physical flow of hydrogen, water and air in the system and the diffusion laws are used to gain insight in the water management. The model is validated on the prediction of the electrical performance and thermal behaviour. The positive impact of temperature on fuel cell performance is shown. New in this model is the inclusion of the water management, for which an extra validation is performed. The model shows that a
minimum temperature has to be reached to maintain the electrolyte concentration. Increasing temperature for better performance without reducing the electrolyte concentration is possible with humidified hot air.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Groep Technologie en Design TM K - miscellaneous

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