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CFD analysis of cooling effects in H(2)-fed solid fuel cells.

AutorGarcía-Camprubí, Alba; Jasak, H.; Fueyo, Norberto
Fecha de publicación2011
CitaciónJournal of Power Sources 196: 7290-7301 (2011)
ResumenA model is presented that describes the main physical phenomena affecting in the performance of a Solid-Oxide Fuel cell (SOFC). The implementation of the model uses an in-house algorithm in a computational fluid-dynamics (CFD) framework that may be used to optimize the SOFC operational parameters. The physical phenomena considered in the model are: (i) mass conservation: multicomponent and multimodal mass transfer in gas channels and electrodes (convection, ordinary diffusion, Knudsen diffusion); (ii) momentum conservation in the gas channels and electrodes; (iii) energy conservation: coupled heat transfer across the whole cell (gas channels, electrodes and electrolyte); (iv) electrochemistry: half-reactions are considered to take place at the electrode-electrolyte interfaces, and activation losses are computed using the general version of the Butler-Volmer equation. The main features of this CFD tool are: (i) it allows the prediction of the characteristic (I-V) curve of an H-2-fed cell; (ii) it is suitable for both tubular and planar cells; (iii) it has been implemented using OpenFOAM-1.5-dev, an open-source CFD-platform based on the Finite Volume Method. The numerical results are validated with published experimental I-V curves for a hydrogen-fed anode-supported micro-tubular SOFC, and a numerical analysis of the influence of different operation conditions on the temperature distribution is performed to procure a better understanding of the heat management of the cell. (C) 2011 Elsevier B.V. All rights reserved.
Identificadoresdoi: 10.1016/j.jpowsour.2011.04.037
issn: 0378-7753
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