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Concept of distributed current collectors
Optimal
current collector size which makes a maximum power density
Optimized current collector and power density
at different temperatures |
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Related Publications:
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P. W.
Li, S. P. Chen, M. K. Chyu, 2005, "Novel Gas Distributors and
Optimization for
High Power Density in Fuel Cells," Journal of Power Sources, Vol.
140, pp. 311-318.P.
W. Li, S. P. Chen, M. K. Chyu, 2006, "To Achieve the Best
Performance through
Optimization of Gas Delivery and Current Collection in Solid oxide
Fuel Cells," ASME
Journal of Fuel Cell Science and Technology, Vol.3, No.2, pp.
188-194.
S. P. Chen, P. W. Li, M. K. Chyu, "Optimization of Gas Delivery and
current Collecting
System in Fuel Cells", Proceedings of Fuel Cell 2006, 4th
International Conference
on Fuel Cell Science, Engineering and Technology, June 19-21, 2006,
Irvine,
California, FUELCELL2006-97063
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Air/oxygen-breathing mass transfer for PEMFCs and DMFCs |
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For
air-breathing fuel cells, the rate of oxygen breathing from air
is the bottle
neck for a sufficient power
density. Our research work has been trying to
understand the free
convection mass transfer and the limited power density
for an
air-breathing fuel cell. |
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List of figures:
Please click on each title to view the image!
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A proton exchange membrane fuel cell with oxygen breathed from air
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Related Publications:
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P. W. Li, T.
Zhang, Q. M. Wang, L. Schaefer, M. K. Chyu, "The Performance of PEM Fuel Cells Fed with Oxygen through the
Free-Convection Mode," Journal of Power Sources, 114(2003) 63-69.
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Modeling the performance
of fuel cells |
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The structure of a fuel cell looks simple, however, the
processes of electrochemical and transport phenomena in fuel
cells are highly coupled and rather complicate. Numerical
modeling is a very viable tool to make clear of the processes
inside a fuel cell, particularly for high temperature fuel cells |
Figure 5c
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List of figures:
Please click on the title to view the image!
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A planar SOFC
Variation of hydrogen concentration
Variation of oxygen concentration
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Related
Publications:
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P.
W. Li, Laura Schaefer, M. K. Chyu, "Multiple Processes in Solid
Oxide Fuel Cells," Chapter-I in book "Transport Phenomena in
Fuel Cells," Edited by B. Sunden, and M. Faghri, ISBN:
1-85312-840-6, WIT Press, 2005
P. W. Li, M. K. Chyu,
"Electrochemical and Transport Phenomena in Solid Oxide Fuel
Cells," (invited research review paper), ASME Int. J. of Heat
Transfer, Vol. 127, Dec. 2005, pp. 1344-1362.
P. W. Li, L. Schaefer, M. K.
Chyu, 2004, "Numerical Model Coupling the Heat and Gas Species'
Multiple Transport Processes in a Tubular SOFC," ASME Journal of
Heat Transfer, Vol.126, No.2, pp219-229.
P. W. Li, K. Suzuki,
"Numerical Modeling and Performance Study of a Tubular Solid
Oxide Fuel Cell," Journal of the Electrochemical Society, 2004,
Volume 151, Issue 4, pp. A548-A557.
P. W. Li, M. K. Chyu,
"Simulation of the Chemical/Electrochemical Reaction and
Heat/Mass Transfer for a Tubular SOFC Working in a Stack,"
Journal of Power Sources, 124(2003), 487-498.
P. W. Li, L. Schaefer, Q. M.
Wang, T. Zhang, M. K. Chyu, "Multi-gas Transport and
Electrochemical Performance in a Polymer Electrolyte Fuel Cell
with Complex Flow Channels," Journal of Power Sources, 115(2003)
90-100.
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Hydrogen generation
station based on solar energy |
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The state of Arizona is very rich for sunny weather and has
sufficient solar energy. Our laboratory is doing research and
development to store solar energy in hydrogen, which will turn
the intermittent solar energy into distributable and
consecutively available energy resources.
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Hydrogen storage
techniques |
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One of the chief barriers to making it a reality for
hydrogen-powered vehicles to travel more than 300 miles is the
insufficient storage of hydrogen on board. We are developing
highly-structured hydride metallic hydrogen storage tanks and
analyzing the processes of hydrogen absorption and release, both
involve heat release and absorption.
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