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Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells
Fuel flexibility is a significant advantage of solid oxide fuel cells (SOFCs) and can be attributed to their high operating temperature. Here we consider a direct internal reforming solid oxide fuel cell setup in which a separate fuel reformer is not required. We construct a multidimensional, detail...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
WILEY‐VCH Verlag
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4986282/ https://www.ncbi.nlm.nih.gov/pubmed/27570502 http://dx.doi.org/10.1002/fuce.201500113 |
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author | Tseronis, K. Fragkopoulos, I.S. Bonis, I. Theodoropoulos, C. |
author_facet | Tseronis, K. Fragkopoulos, I.S. Bonis, I. Theodoropoulos, C. |
author_sort | Tseronis, K. |
collection | PubMed |
description | Fuel flexibility is a significant advantage of solid oxide fuel cells (SOFCs) and can be attributed to their high operating temperature. Here we consider a direct internal reforming solid oxide fuel cell setup in which a separate fuel reformer is not required. We construct a multidimensional, detailed model of a planar solid oxide fuel cell, where mass transport in the fuel channel is modeled using the Stefan‐Maxwell model, whereas the mass transport within the porous electrodes is simulated using the Dusty‐Gas model. The resulting highly nonlinear model is built into COMSOL Multiphysics, a commercial computational fluid dynamics software, and is validated against experimental data from the literature. A number of parametric studies is performed to obtain insights on the direct internal reforming solid oxide fuel cell system behavior and efficiency, to aid the design procedure. It is shown that internal reforming results in temperature drop close to the inlet and that the direct internal reforming solid oxide fuel cell performance can be enhanced by increasing the operating temperature. It is also observed that decreases in the inlet temperature result in smoother temperature profiles and in the formation of reduced thermal gradients. Furthermore, the direct internal reforming solid oxide fuel cell performance was found to be affected by the thickness of the electrochemically‐active anode catalyst layer, although not always substantially, due to the counter‐balancing behavior of the activation and ohmic overpotentials. |
format | Online Article Text |
id | pubmed-4986282 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | WILEY‐VCH Verlag |
record_format | MEDLINE/PubMed |
spelling | pubmed-49862822016-08-26 Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells Tseronis, K. Fragkopoulos, I.S. Bonis, I. Theodoropoulos, C. Fuel Cells (Weinh) Original Research Papers Fuel flexibility is a significant advantage of solid oxide fuel cells (SOFCs) and can be attributed to their high operating temperature. Here we consider a direct internal reforming solid oxide fuel cell setup in which a separate fuel reformer is not required. We construct a multidimensional, detailed model of a planar solid oxide fuel cell, where mass transport in the fuel channel is modeled using the Stefan‐Maxwell model, whereas the mass transport within the porous electrodes is simulated using the Dusty‐Gas model. The resulting highly nonlinear model is built into COMSOL Multiphysics, a commercial computational fluid dynamics software, and is validated against experimental data from the literature. A number of parametric studies is performed to obtain insights on the direct internal reforming solid oxide fuel cell system behavior and efficiency, to aid the design procedure. It is shown that internal reforming results in temperature drop close to the inlet and that the direct internal reforming solid oxide fuel cell performance can be enhanced by increasing the operating temperature. It is also observed that decreases in the inlet temperature result in smoother temperature profiles and in the formation of reduced thermal gradients. Furthermore, the direct internal reforming solid oxide fuel cell performance was found to be affected by the thickness of the electrochemically‐active anode catalyst layer, although not always substantially, due to the counter‐balancing behavior of the activation and ohmic overpotentials. WILEY‐VCH Verlag 2016-06-01 2016-06 /pmc/articles/PMC4986282/ /pubmed/27570502 http://dx.doi.org/10.1002/fuce.201500113 Text en Copyright © 2016 The Authors. Published by Wiley‐VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Open access. |
spellingShingle | Original Research Papers Tseronis, K. Fragkopoulos, I.S. Bonis, I. Theodoropoulos, C. Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells |
title | Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells |
title_full | Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells |
title_fullStr | Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells |
title_full_unstemmed | Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells |
title_short | Detailed Multi‐dimensional Modeling of Direct Internal Reforming Solid Oxide Fuel Cells |
title_sort | detailed multi‐dimensional modeling of direct internal reforming solid oxide fuel cells |
topic | Original Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4986282/ https://www.ncbi.nlm.nih.gov/pubmed/27570502 http://dx.doi.org/10.1002/fuce.201500113 |
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