Cathode flow control for fuel cell power plant

Details Cathode flow control for fuel cell power plant Cathode flow control for fuel cell power plant

1988-05-05

1989-08-22

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 23, H01M 804

Patent

active

048595454

ABSTRACT:
A system and method for regulating the total oxygen content entering the cathode side of a fuel cell stack at less than full power depends on measurement of: oxygen partial pressure in the cathode exhaust stream; total flow entering the cathode; and current produced by the stack. During partial power operation of the stack, it is desirable to limit the cathode potential, or voltage, by recycling cathode exhaust and mixing it with incoming fresh air fed into the cathodes. This system ensures that the total oxygen flow to the cathodes remains constant at any given current by reducing the amount of fresh air flowing to the cathodes as the recycled cathode exhaust flow is increased.

REFERENCES:
patent: 4202933 (1980-05-01), Reiser et al.

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