Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20971
Title: Computational fluid dynamics modeling of a solid oxide electrolyzer cell for hydrogen production
Authors: Ni, M 
Keywords: Electrochemistry
Heat and mass transfer
High temperature steam electrolysis
Porous media
Solid oxide fuel cell (SOFC)
Transport phenomena
Issue Date: 2009
Publisher: Pergamon Press
Source: International journal of hydrogen energy, 2009, v. 34, no. 18, p. 7795-7806 How to cite?
Journal: International journal of hydrogen energy 
Abstract: A 2D computational fluid dynamics (CFD) model was developed to study the performance of a planar solid oxide electrolyzer cell (SOEC) for hydrogen production. The governing equations for mass continuity, momentum conservation, energy conservation and species conservation were discretized with the finite volume method (FVM). The coupling of velocity and pressure was treated with the SIMPLEC (Semi-Implicit Method for Pressure Linked Equations - Consistent) algorithm. Simulations were performed to investigate the effects of operating/structural parameters on heat/mass transfer and the electric characteristics of a planar SOEC. It is found that the gas velocity at the cathode increases significantly along the main flow channel, as the increase in H2 molar fraction decreases the density and viscosity of the gas mixture at the cathode. It is also found that increasing the inlet gas velocity can enhance the SOEC performance. Another important finding is that the electrode porosity has small effect on SOEC performance. The results of this paper provide better understanding on the coupled heat/mass transfer and electrochemical reaction phenomena in an SOEC. The model developed can serve as a useful tool for SOEC design optimization.
URI: http://hdl.handle.net/10397/20971
ISSN: 0360-3199
EISSN: 1879-3487
DOI: 10.1016/j.ijhydene.2009.07.080
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