2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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Clean Technology 2008

Computational and Experimental Study of High Performance Low Temperature Planar Solid Oxide Fuel Cell (SOFC) using Sc2O3-CeO2-ZrO2 Electrolyte

A. Sleiti
University of Central Florida, US

Keywords:
intermediate temperature SOFC, performance, CFD

Abstract:
The energy efficiency and emission reduction advantages of fuel cell technology over the conventional power-generating systems make fuel cells extremely attractive to researchers. However, the existence of numerous technical barriers presents serious challenge for fuel cell technology to become commercially competitive. Reducing the operating temperature of the SOFC stack to intermediate temperature range of 550 oC to 800 oC is one of the significant directions being pursued to reduce the cost of SOFC stacks and balance of plant. To assist the development of new and advanced intermediate temperature fuel cell technology, a comprehensive cell measurements and well-validated numerical modeling using the advanced CFD techniques are equally important. Detailed measurements within the fuel cell are extremely difficult to perform due to the compactness and complexities of the design of the fuel cell. For example, one of the key parameters affecting the fuel cell performance and difficult to measure accurately is the temperature distribution. Because material properties, chemical kinetics, and transport properties depend heavily on the temperature distribution of the fuel cell, an accurate determination of the temperature distribution is required. Therefore, CFD techniques can be very useful alternative during both post-design and design improvement stages. In this study, CFD techniques are used to study the performance of low temperature planar Solid Oxide Fuel Cell (SOFC) using Sc2O3-CeO2-ZrO2 electrolyte. Numerical results are validated against previously performed experimental investigations that showed poor performance. Once the CFD techniques are validated, further parametric studies of the fuel cell are performed in order to suggest improvements to the performance.


Nanotech 2008 Conference Program Abstract