Fuel cell water transport

Details Fuel cell water transport Fuel cell water transport

1989-12-21

1990-11-27

Kalafut, Stephen J.

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 26, 429 30, 429 34, H01M 804

Patent

active

049735306

ABSTRACT:
The moisture content and temperature of hydrogen and oxygen gases is regulated throughout traverse of the gases in a fuel cell incorporating a solid polymer membrane. At least one of the gases traverses a first flow field adjacent the solid polymer membrane, where chemical reactions occur to generate an electrical current. A second flow field is located sequential with the first flow field and incorporates a membrane for effective water transport. A control fluid is then circulated adjacent the second membrane on the face opposite the fuel cell gas wherein moisture is either transported from the control fluid to humidify a fuel gas, e.g., hydrogen, or to the control fluid to prevent excess water buildup in the oxidizer gas, e.g., oxygen. Evaporation of water into the control gas and the control gas temperature act to control the fuel cell gas temperatures throughout the traverse of the fuel cell by the gases.

REFERENCES:
patent: 3418168 (1968-12-01), Wentworth
patent: 4345008 (1982-08-01), Breault
patent: 4530886 (1985-07-01), Sederquist
patent: 4678724 (1987-07-01), McElroy
patent: 4686159 (1987-08-01), Miyoshi
patent: 4769297 (1988-09-01), Reiser et al.

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