Fuel cell system for operation at pressures below the...

Details Fuel cell system for operation at pressures below the... Fuel cell system for operation at pressures below the...

2005-08-09

2005-08-09

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000, C429S006000

Reexamination Certificate

active

06926981

ABSTRACT:
In the present fuel cell systems, fuel cell stacks operate on a fuel stream having a pressure that is below the pressure of the surrounding environment, for example below atmospheric pressure. In the event of a leak, the fuel stream will not escape to the surrounding atmosphere, but rather gases from the surrounding environment will leak into the fuel stream. The fuel stream generally cannot exit the fuel cell stack during normal operation. The fuel cell stack may be periodically purged by increasing the pressure of the fuel stream above the pressure of the surrounding environment and by permitting exit through the fuel stream outlet. A monitoring device can be employed to determine when to purge the fuel cell stack.

REFERENCES:
patent: 3438814 (1969-04-01), White
patent: 3558361 (1971-01-01), White
patent: 5366818 (1994-11-01), Wilkinson et al.
patent: 6106964 (2000-08-01), Voss et al.
patent: 11-339832 (1999-12-01), None

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