Start up system and method for a fuel cell power plant using a cathode electrode fuel purge
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United States of America Patent
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Jan 4, 2005
Grant Date -
Jul 1, 2004
app pub date -
Dec 26, 2002
filing date -
Dec 26, 2002
priority date (Note) -
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Abstract
The invention is a start up system and method for a fuel cell power plant (10) using a purging of the cathode flow field (38) with a hydrogen rich reducing fluid fuel to minimize corrosion of the cathode electrode (16). The method for starting up the shut down fuel cell power plant (10) includes the steps of: a. purging the cathode flow field (38) with the reducing fluid fuel; b. then, directing the reducing fluid fuel to flow through an anode flow field (28); c. next, terminating flow of the fuel through the cathode flow field (38) and directing an oxygen containing oxidant to flow through the cathode flow field (38); and, d. finally, connecting a primary load (70) to the fuel cell (12) so that electrical current flows from the fuel cell (12) to the primary load (70).
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