As one of the possible electrolyte materials for intermediate temperature SOFCs that works around 500 to 800°C, we focus on Gadolinia Doped Ceria (GDC). This ceramic material shows reasonable ion conductivity even at 600°C. It, however, is a mixed conductive material having non-negligible electronic conductivity. In this study, the fundamental performance of a simple planar SOFC with GDC electrolyte is numerically investigated. The effects of electrical leakage on the cell performance are the main focus of discussion. The electrolyte thickness is varied in a range from 50 to 200μm. Both air and fuel flows are assumed to be steady and laminar. Governing equations are the continuity, momentum, energy and mass transfer equations. They are solved numerically by the control volume method. It is found that the leakage of electricity becomes larger for the smaller electrolyte thickness cases, and is more prominent for an electrolyte thickness of less than 80μm. Under such conditions, output power and energy conversion efficiency decrease dramatically. On the other hand, energy conversion efficiency also decreases for an electrolyte thickness that is too large because of the increase of ohmic overpotential of the electrolyte. Consequently, there seems to be an adequate thickness for the electrolyte that gives preferable output power and energy conversion efficiency.
Skip Nav Destination
ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology
June 19–21, 2006
Irvine, California, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4247-9
PROCEEDINGS PAPER
Numerical Modeling of SOFC Based on Mixed Conductive Electrolyte
Tatsuo Ishikawa,
Tatsuo Ishikawa
Kyoto University, Kyoto, Japan
Search for other works by this author on:
Hideo Yoshida
Hideo Yoshida
Kyoto University, Kyoto, Japan
Search for other works by this author on:
Hiroshi Iwai
Kyoto University, Kyoto, Japan
Tatsuo Ishikawa
Kyoto University, Kyoto, Japan
Hideo Yoshida
Kyoto University, Kyoto, Japan
Paper No:
FUELCELL2006-97200, pp. 711-717; 7 pages
Published Online:
September 15, 2008
Citation
Iwai, H, Ishikawa, T, & Yoshida, H. "Numerical Modeling of SOFC Based on Mixed Conductive Electrolyte." Proceedings of the ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B. Irvine, California, USA. June 19–21, 2006. pp. 711-717. ASME. https://doi.org/10.1115/FUELCELL2006-97200
Download citation file:
8
Views
Related Proceedings Papers
Related Articles
A Numerical Model Coupling the Heat and Gas Species’ Transport Processes in a Tubular SOFC
J. Heat Transfer (April,2004)
Modeling of Overpotentials in an Anode-Supported Planar SOFC Using a Detailed Simulation Model
J. Fuel Cell Sci. Technol (October,2011)
One-Dimensional Model of a Tubular Solid Oxide Fuel Cell
J. Fuel Cell Sci. Technol (May,2008)
Related Chapters
Physiology of Human Power Generation
Design of Human Powered Vehicles
Discussion of Parameters to Be Monitored
Consensus on Operating Practices for the Sampling and Monitoring of Feedwater and Boiler Water Chemistry in Modern Industrial Boilers (CRTD-81)
PVDF/CO 3 O 4 Nanocomposites: Porosity, Crystallinity and Conductivity
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)