Startup and shutdown procedures for operating a fuel cell assembly
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United States of America Patent
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Jul 23, 2013
Grant Date -
Apr 24, 2008
app pub date -
Dec 29, 2004
filing date -
Dec 29, 2004
priority date (Note) -
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Abstract
A fuel cell assembly (20) has an extended operational life, in part, because of unique startup and shutdown procedures used for operating the fuel cell assembly. In disclosed examples, a purge gas mixture of hydrogen and nitrogen includes less than 2% hydrogen for selectively purging portions of the assembly during a startup or shutdown procedure. In a disclosed example, the hydrogen-nitrogen mixture contains less than 0.1% hydrogen.
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