QI Yubo, ZHANG Shuxing
(China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518124, Guangdong, China)

Abstract: The traditional solid oxide fuel cell (SOFC) with parallel flow channels is taken as the object to establish a closed-loop mathematical model for the fuel layer, air layer, metal connector layer and anode-electrolyte-cathode layer (PEN), by operating discretization processing along the gas flow direction for key parameters and combining with auxiliary equations such as quasi-static assumptions, node equivalent resistances, and thermophysical property equations. Using MATLAB Simulink mathematical software, the simulation of the flat-type SOFC was conducted, by which the functions of analyzing the transient evolution of internal temperature, pressure, composition, current density, voltage and power along the gas flow direction are realized. Dynamic temperature characteristics of the internal nodes of the cell with time evolution were been simulated, combining with the literature data to verify the reliability of the established model, with maximum error to be 6.6%. The study shows the time required for temperature field stabilization of the cathode and anode is within hundreds of seconds, which is consistent with the conclusions reported in the open literature.
Key words: SOFC; mathematical simulation; simulation analysis