Cascaded stack with gas flow recycle in the first stage

Details Cascaded stack with gas flow recycle in the first stage Cascaded stack with gas flow recycle in the first stage

2011-08-30

2011-08-30

Gilliam, Barbara L (Department: 1727)

Chemistry: electrical current producing apparatus, product, and

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

C429S408000, C429S415000, C429S452000

Reexamination Certificate

active

08007943

ABSTRACT:
A fuel cell system including a humidification system is described. The humidification system employs a recycling system that recycles relatively humid gas exhausted from a multistage fuel cell stack, either on the anode and/or cathode side, and sends this relatively humid gas back to be combined with relatively dry supply gas, such as but not limited to hydrogen and/or air. The humidified supply gas mixture is then reintroduced into the first stage of the multistage fuel cell stack. A recirculation device, such as but not limited to a pump and/or an ejector, can be used to aid in moving the humid exhaust gas back through a recycle gas line to be combined with the supply gas.

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