Method and apparatus for maintaining neutral water balance in a fuel cell system
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United States of America Patent
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Sep 9, 2003
Grant Date -
Feb 13, 2003
app pub date -
Jul 11, 2001
filing date -
Jan 12, 1999
priority date (Note) -
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Abstract
In a fuel cell system, sufficient water to supply the consumption needs of the system, particularly by the system humidifiers and fuel processor, can be obtained from the exhaust of the fuel cell stack without the use of a condenser, by controlling the operating temperature of the fuel cell stack. The operating temperature can be controlled, for example, using a controller that monitors water level in the process water reservoir and increases or decreases the operating temperature through control of the fuel cell cooling system to maintain the water level within a predetermined range representative of neutral water balance in the system.
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