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Operation of A Small MCFC Stack Using New Designed Circular Separator  

Han, Jonghee (Fuel Cell Research Center, Korea Institute of Science and Technology)
Roh, Gil-Tae (Fuel Cell Research Center, Korea Institute of Science and Technology)
Yoon, Sung Pill (Fuel Cell Research Center, Korea Institute of Science and Technology)
Nam, Suk Woo (Fuel Cell Research Center, Korea Institute of Science and Technology)
LIm, Tae Hoon (Fuel Cell Research Center, Korea Institute of Science and Technology)
Hong, Seong Ahn (Fuel Cell Research Center, Korea Institute of Science and Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.14, no.3, 2003 , pp. 229-235 More about this Journal
Abstract
A 50W class MCFC stack was operated in order to test a new design of the circular shaped separator. in the new design, the anode gas was supplied into the stack and was exhausted out of the stack after the anode reaction. The exhausted gas was reacted with the cathode gas supplied with excess oxygen in the vessel in which the stack was placed. Then the reacted gas flowed into the cathode side of the stack and was exhausted through the outlet located in the center of the stack. The average voltage of the single cells in the stack was 0.835V under the current density of $150mA/cm^2$, initially, and the degradation rate of the stack voltage was 1.7%/1,000h. High stack voltage with good stability of the present stack was due to the small temperature gradient in the stack. The small temperature gradient as well as the easiness of temperature control was the result of the new configuration of the separator which utilized the heat of the combustion reaction between anode outlet gas and the cathode inlet gas for heating the stack.
Keywords
MCFC; Circular separator; Small stack;
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  • Reference
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