System stability and performance improvement with anode heat...

Details System stability and performance improvement with anode heat... System stability and performance improvement with anode heat...

2011-04-05

2011-04-05

Mayes, Melvin C (Department: 1732)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

C429S435000

Reexamination Certificate

active

07919209

ABSTRACT:
A fuel cell system that increases stack stability by reducing the amount of liquid water droplets at the anode input of a fuel cell stack in the system. Re-circulated anode exhaust gas from the fuel cell stack and fresh hydrogen gas are sent to an anode heat exchanger so that both the fresh hydrogen gas and the re-circulated anode exhaust gas are heated to reduce the formation of water droplets in the anode input gas. Further, a portion of the heated cooling fluid directly from the fuel cell stack is sent to the heat exchanger to heat the fresh hydrogen gas and the re-circulation hydrogen before the cooling fluid is sent to an isolation heat exchanger to have its temperature reduced.

REFERENCES:
patent: 6692851 (2004-02-01), Keskula et al.
patent: 6713204 (2004-03-01), Shimanuki et al.
patent: 6948559 (2005-09-01), Reinke et al.

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