Solid Oxide Fuel Cells英文电子书.pdf

Chemical Engineering Science 63 (2008) 5356 -- 5365 Contents lists available at ScienceDirect Chemical Engineering Science journal homepage: /locate/ces Numerical modeling of solid oxide fuel cells a, ∗ a a b Thinh X. Ho , Pawel Kosinski , Alex C. Hoffmann , Arild Vik a Department of Physics and Technology, University of Bergen, Allegt 55, 5007 Bergen, Norway b Prototech AS, Fantoftvegen 38, 5892 Bergen, Norway A R T I C L E I N F O A B S T R A C T Article history: This paper presents a numerical model for a planar solid oxide fuel cell (SOFC) with mixed ionic–electronic Received 17 January 2008 conducting electrodes. Transport of positive or negative charges, which takes place in the direction of Received in revised form 18 July 2008 down- or up-gradient electric potential, respectively, within the composite electrodes and through the Accepted 22 July 2008 electrolyte membrane, is mimicked by making use of an algorithm for Fickian diffusion in the commercial Available online 25 July 2008 software. The output cell voltage, which is the potential difference between the two current collectors, is fixed at a given value. The coupled equations describing the conservation of mass, momentum and Keywords: SOFC