Microjet reactant delivery system for use in fuel cells

Details Microjet reactant delivery system for use in fuel cells Microjet reactant delivery system for use in fuel cells

2011-04-12

2011-04-12

Apicella, Karie O'Neill (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

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

Fuel cell with specified reactant

C429S513000, C429S515000

Reexamination Certificate

active

07923168

ABSTRACT:
A new reactant delivery system for delivering reactants to the membrane electrode assembly of a fuel cell. The invention uses a plurality of small holes to propel high-velocity streams of reactant gases (“microjets”) against an impingement plate. The microjets assist in catalyzing the reactant gases and forcing them toward the proton exchange membrane. Reactant gas flow is primarily perpendicular to the orientation of the proton exchange membrane, thereby enhancing diffusion rates. In addition, each microjet acts like an expansion valve, which significantly cools the flowing gas and provides internal heat absorption. This internal heat absorption permits higher energy densities in the fuel cell.

REFERENCES:
patent: 3134697 (1964-05-01), Niedrach
patent: 6099984 (2000-08-01), Rock
patent: 2006/0183006 (2006-08-01), Liu et al.
patent: 2006/0183008 (2006-08-01), Finkelshtain et al.

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