A Physically-Based Dynamic Model for Solid Oxide Fuel Cells

Summary form only given: This paper presents a physically-based dynamic model for tubular solid oxide fuel cells (SOFCs), based on the electrochemical and thermodynamic characteristics inside SOFC. The diffusion, material conservation, electrochemical and thermodynamic equations are used to develop the SOFC model. The effect of temperature on the steady-state (V-l and P-l) characteristics of the SOFC model has been studied, and the model responses have been obtained for constant fuel flow as well as constant fuel utilization operating modes. The dynamic characteristics of the model are investigated in small, medium and large time scales, from milliseconds to minutes. The model has been implemented in MATLAB/Simulinkreg and used to investigate the distributed generation applications of SOFCs.