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Título

Development and experimental validation of a dynamic thermal and water distribution model of an open cathode proton exchange membrane fuel cell

AutorStrahl, Stephan; Husar, Attila ; Serra, Maria
Palabras claveWater transport
Electroosmotic drag
Water diffusion
Thermal management
Proton exchange membrane fuel cells
Fecha de publicación2011
EditorElsevier
CitaciónJournal of Power Sources 196(9): 4251-4263 (2011)
ResumenWater concentration in proton exchange membrane (PEM) fuel cells strongly influences performance and durability which demands for fundamental understanding of water transport mechanisms. The system efficiency can be significantly improved with greater understanding of water flux dynamics through the membrane and its dependence on the internal conditions of the fuel cell. Therefore, a two-dimensional, non-isothermal, dynamic model of a 100 W open cathode, self-humidified PEM fuel cell system has been developed, that is capable of representing system specific control mechanisms for water and thermal management. The model consists of three coupled submodels based on energy, momentum and water mass balance of the system. The work is based on experimental observations of the investigated fuel cell stack, for which the crucial coefficients for water transport, namely the diffusion and the electroosmotic drag (EOD) coefficient have been determined. The EOD coefficient was measured as 0.47¿0.48 water molecules per proton at stack currents from 1 to 3 A. Validation of the steady state and the dynamic model by using experimental data, directly obtained from laboratory tests, has shown that the model predictions match the experimental data well.
DescripciónTrabajo presentado al CONAPPICE celebrado en Sevilla del 16 al 18 de junio de 2010.
Versión del editorhttp://dx.doi.org/10.1016/j.jpowsour.2010.10.074
URIhttp://hdl.handle.net/10261/96798
DOI10.1016/j.jpowsour.2010.10.074
Identificadoresdoi: 10.1016/j.jpowsour.2010.10.074
issn: 0378-7753
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