- Link:
- http://hdl.handle.net/1721.1/38564
- Collection:
-
- Subject
- Mechanical Engineering.
- Creators:
- Lee, Won Yong, S.M. Massachusetts Institute of Technology Lee, Won Yong, S.M. Massachusetts Institute of
Technology
- Contributors:
- Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Ahmed F. Ghoniem. Massachusetts Institute of Technology. Dept. of
Mechanical Engineering.
- Format
- 110 p.
- Language
- eng
- Publisher
- Massachusetts Institute of Technology
- Rights
- M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See
provided URL for inquiries about permission.
- Rights
- http://dspace.mit.edu/handle/1721.1/7582
- Type
- Thesis
- Description
- A comprehensive membrane-electrode assembly (MEA)
model of Solid Oxide Fuel Cell (SOFC)s is developed to investigate
the effect of various design and operating conditions on the cell
performance and to examine the underlying mechanisms that govern
their performance. We review and compare the current modeling
methodologies, and develop an one-dimensional MEA model based on a
comprehensive approach that include the dusty-gas model (DGM) for
gas transport in the porous electrodes, the detailed heterogeneous
elementary reaction kinetics for the thermo-chemistry in the anode,
and the detailed electrode kinetics for the electrochemistry at the
triple-phase boundary. With regard to the DGM, we corrected the
Knudsen diffusion coefficient in the previous model developed by
Multidisciplinary University Research Initiative. Further, we
formulate the conservation equations in the unsteady form, allowing
for analyzing the response of the MEA to imposed dynamics. As for
the electrochemistry model, we additionally analyzed all the
possibilities of the rate-limiting reaction and proposed
rate-limiting switched mechanism. Our model prediction agrees with
experimental results significantly better than previous models,
especially at high current density.
- Description
- by Won Yong Lee.
- Description
- Thesis (S.M.)--Massachusetts Institute of
Technology, Dept. of Mechanical Engineering, 2006.
- Description
- Includes bibliographical references (p.
107-110).
- Rights
- M.I.T. theses are protected by copyright. They may be
viewed from this source for any purpose, but reproduction or
distribution in any format is prohibited without written
permission. See provided URL for inquiries about
permission.
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