Modeling activities at PNNL support design and development of modular SOFC systems. The SOFC stack modeling capability at PNNL has developed to a level at which planar stack designs can be compared and optimized for startup performance. Thermal-fluids and stress modeling is being performed to predict the transient temperature distribution and to determine the thermal stresses based on the temperature distribution. Current efforts also include the development of a model for calculating current density, cell voltage, and heat production in SOFC stacks with hydrogen or other fuels. The model includes the heat generation from both Joule heating and chemical reactions. It also accounts for species production and destruction via mass balance. The model is being linked to the finite element code MARC to allow for the evaluation of temperatures and stresses during steady state operations.
Revised: March 7, 2003 |
Published: December 1, 2002
Citation
Khaleel M.A., K.P. Recknagle, Z. Lin, J.E. Deibler, L.A. Chick, and J.W. Stevenson. 2002.Thermo-Mechanical and Electrochemistry Modeling of Planar SOFC Stacks. In Solid Oxide Fuel Cell VII, Electrochemical Society Proceedings, 16, 1032-1041. Pennington:Electrochemical Society, Inc.PNNL-SA-37966.