Systems and methods for regulating fuel cell air flow during low loads or cold temperature operation
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United States of America Patent
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Dec 30, 2014
Grant Date -
Nov 17, 2011
app pub date -
Apr 29, 2011
filing date -
May 11, 2010
priority date (Note) -
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Abstract
Systems and methods for regulating fuel cell air flow, such as during low loads and/or cold temperature operation. These systems and methods may include providing a thermal management fluid, such as air, to the fuel cell stack, transferring thermal energy between the thermal management fluid and the fuel cell stack, and varying the flow rate of the thermal management fluid that comes into contact with the fuel cell stack to maintain the temperature of the fuel cell stack within an acceptable temperature range. Varying the flow rate of the thermal management fluid may include varying the overall supply rate of the thermal management fluid within the fuel cell system and/or providing an alternative flow path for the thermal management fluid such that a portion of the thermal management fluid supplied by the fuel cell system does not come into contact with the fuel cell stack.
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