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http://hdl.handle.net/10397/9553
Title: | Numerical investigation on impacts on fuel velocity distribution nonuniformity among solid oxide fuel cell unit channels | Authors: | Lin, B Shi, Y Ni, M Cai, N |
Issue Date: | 2015 | Source: | International journal of hydrogen energy, 2015, v. 40, no. 7, p. 3035-3047 | Abstract: | In this paper, fuel velocity distribution nonuniformity among channels in planar SOFC units under different working conditions is numerically investigated. A comprehensive three-dimensional electrochemical model is validated and then adopted in a cell unit model with structure of a real cell unit. The model couples interdependent process of species transport, heat transport, chemical reaction, electrochemical reaction, ionic conduction and electronic conduction. A nonuniformity index is proposed to quantitatively evaluate nonuniform degree of fuel velocity distribution among channels in the planar SOFC unit. The effect of the fuel velocity distribution nonuniformity on cell performance and the effects of working voltage, flow rate, flow pattern and fuel type on fuel velocity distribution nonuniformity among channels are investigated. The result shows that an increase in fuel velocity distribution nonunifomtiy can lead to a cell performance drop and fuel velocity distribution is less uniform under lower cell voltage, lower flow rate, using co-flow configuration instead of counter-flow or using syngas as fuel instead of hydrogen. In addition, the CO oxidation should be considered when studying the fuel velocity distribution nonuniformity among channels. | Keywords: | Cell performance Fuel velocity distribution among channels Modeling Nonuniformity Planar solid oxide fuel cell Working condition |
Publisher: | Pergamon Press | Journal: | International journal of hydrogen energy | ISSN: | 0360-3199 | EISSN: | 1879-3487 | DOI: | 10.1016/j.ijhydene.2014.12.088 | Rights: | Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. The definitive version Lin, B., Shi, Y., Ni, M., & Cai, N. (2015). Numerical investigation on impacts on fuel velocity distribution nonuniformity among solid oxide fuel cell unit channels. International Journal of Hydrogen Energy, 40(7), 3035-3047 is available at https://doi.org/10.1016/j.ijhydene.2014.12.088 |
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