SOFC modeling at the cell scale including hydrogen and carbon monoxide as electrochemically active fuels
(2012) ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2012 Collocated with the ASME 2012 6th International Conference on Energy Sustainability p.281-291- Abstract
Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method (with the software COMSOL Multiphysics) in two-dimensions is developed to describe an intermediate temperature solid oxide fuel cell (SOFC) single cell. Governing equations covering heat, gas-phase species, momentum, ion and electron transport are implemented and coupled to kinetics describing internal reforming and electrochemical reactions. Both hydrogen and carbon monoxide are considered as electrochemically active fuels within the anode. The activation polarization in the electrodes and the ohmic polarization due to ion... (More)
Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method (with the software COMSOL Multiphysics) in two-dimensions is developed to describe an intermediate temperature solid oxide fuel cell (SOFC) single cell. Governing equations covering heat, gas-phase species, momentum, ion and electron transport are implemented and coupled to kinetics describing internal reforming and electrochemical reactions. Both hydrogen and carbon monoxide are considered as electrochemically active fuels within the anode. The activation polarization in the electrodes and the ohmic polarization due to ion transport in the YSZ material are found to be the major part of the potential losses. The activation polarization is the most significant and it is smaller within the cathode compared to the anode for this study. The ion current density and the activation polarization are the highest at the electrolyte-electrode interface and decrease rapidly within the electrodes as the distance from the interface increases. However, the ohmic polarization by ion transfer increases for the positions away from the interface. The addition of the electrochemical reaction with CO as fuel increases the current density. It is concluded that the temperature and current density are strongly integrated and when any of them is changed, the other follows, and the change is accelerated.
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- author
- Andersson, Martin LU ; Navasa, Maria LU ; Yuan, Jinliang LU and Sundén, Bengt LU
- organization
- publishing date
- 2012
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- 2D, Carbon monoxide, Cell scale, Electrochemical reactions, Hydrogen, Modeling, SOFC
- host publication
- ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability
- article number
- FuelCell2012-91112
- pages
- 11 pages
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, FUELCELL 2012 Collocated with the ASME 2012 6th International Conference on Energy Sustainability
- conference location
- San Diego, CA, United States
- conference dates
- 2012-07-23 - 2012-07-26
- external identifiers
-
- scopus:84892664026
- ISBN
- 9780791844823
- language
- English
- LU publication?
- yes
- id
- ac5602be-bb4d-4b6d-871c-12b33fa01a54
- date added to LUP
- 2016-04-18 14:02:11
- date last changed
- 2022-01-30 02:44:22
@inproceedings{ac5602be-bb4d-4b6d-871c-12b33fa01a54,
abstract = {{<p>Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method (with the software COMSOL Multiphysics) in two-dimensions is developed to describe an intermediate temperature solid oxide fuel cell (SOFC) single cell. Governing equations covering heat, gas-phase species, momentum, ion and electron transport are implemented and coupled to kinetics describing internal reforming and electrochemical reactions. Both hydrogen and carbon monoxide are considered as electrochemically active fuels within the anode. The activation polarization in the electrodes and the ohmic polarization due to ion transport in the YSZ material are found to be the major part of the potential losses. The activation polarization is the most significant and it is smaller within the cathode compared to the anode for this study. The ion current density and the activation polarization are the highest at the electrolyte-electrode interface and decrease rapidly within the electrodes as the distance from the interface increases. However, the ohmic polarization by ion transfer increases for the positions away from the interface. The addition of the electrochemical reaction with CO as fuel increases the current density. It is concluded that the temperature and current density are strongly integrated and when any of them is changed, the other follows, and the change is accelerated.</p>}},
author = {{Andersson, Martin and Navasa, Maria and Yuan, Jinliang and Sundén, Bengt}},
booktitle = {{ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology Collocated with the ASME 2012 6th International Conference on Energy Sustainability}},
isbn = {{9780791844823}},
keywords = {{2D; Carbon monoxide; Cell scale; Electrochemical reactions; Hydrogen; Modeling; SOFC}},
language = {{eng}},
pages = {{281--291}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{SOFC modeling at the cell scale including hydrogen and carbon monoxide as electrochemically active fuels}},
year = {{2012}},
}