ANODE UTILIZATION CONTROL SYSTEM FOR A FUEL CELL POWER PLANT
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United States of America Patent
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Issued Date -
Sep 8, 2011
app pub date -
Dec 1, 2008
filing date -
Dec 1, 2008
priority date (Note) -
Abandoned
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Abstract
The control system (10) utilizes an oxygen sensor (78) to sense an oxygen concentration within a burner exhaust (66) of a fuel processing system (40), wherein the burner device (44) utilizes an anode exhaust stream from a fuel cell (12) to supply heat to a reformer (48). If the anode utilization by the fuel cell (12) anode (14) exceeds an acceptable range, less hydrogen is available for the burner device (44) and more oxygen will therefore be sensed by the oxygen sensor. An oxygen sensor controller (80), in response to the increase in sensed oxygen, increases flow of a fuel feedstock (42) into the reformer (48) to provide more hydrogen fuel to the anode (14) to thereby return anode utilization to an acceptable anode utilization range. An opposite control sequence occurs if anode utilization falls below the acceptable range.
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