An intermediate temperature solid oxide fuel cell (SOFC) is developed and its
performance is investigated experimentally and theoretically. In the experimental
program, a gadolinium doped ceria based membrane electrode group is developed
with the tape casting and screen printing methodology and characterized. An
experimental setup is devised for the performance measurement of SOFCs and the
performance of produced cells is investigated over a range of parameters including
the electrolyte thickness, the sintering temperature, the operation temperature etc.
The experimental setup is then further modified to measure the temperature
distribution in the large SOFC single cells. The effects of operating parameters on
the temperature distribution are investigated and the parameter spaces leading high
efficiency without cracking the ceramic membrane are identified.
In theoretical study a mathematical model is developed to represent the fluid flow,
the heat transfer, the species transport and the electrochemical reaction in
intermediate temperature of solid oxide fuel cells.The differential equations are
solved numerically with a commercial CFD code which employs a control volume
based approach. The temperature distribution and species distribution during theSOFC operation is analyzed. The effects of operation parameters on critical SOFC
characteristics and the performance are numerically investigated over a range of
parameter space.
The experimental and numerical results are compared to validate the mathematical
model. The mathematical model is found to agree reasonable with experimental data.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12608816/index.pdf |
| Date | 01 October 2007 |
| Creators | Timurkutluk, Bora |
| Contributors | Tari, Ilker |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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