Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
1999-12-20
2002-04-30
Chaney, Carol (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S010000, C429S006000
Reexamination Certificate
active
06379829
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to a fuel cell system.
2. Description of the Related Art
A conventional fuel cell system is disclosed in, for example, Japanese Patent Laid-open Print No. Hei.6-325780 published without examination on Nov. 25, 1994. In this fuel cell system, water in an off-gas of a fuel gas and an off-gas of an oxidizing agent gas are recycled. To this end, water vapor or the water in gas phase within the off-gas of the fuel gas is condensed at a gas separator provided in a conduit through which the off-gas of the fuel gas passes, while water vapor or the water in gas phase of the off-gas of the oxidizing agent gas is condensed at a gas separator provided in a conduit through which the off-gas of the oxidizing agent passes.
However, in the foregoing conventional fuel cell system, if efficient water recovery is desired, a pressure loss in each conduit becomes large, thereby possibly lowering the efficiency of the entire fuel cell system.
SUMMARY OF THE INVENTION
It is, therefore, a principal object of the present invention to provide a fuel cell system which is free from the foregoing drawback.
In order to attain the above and other objects, the present invention provides a fuel cell system which comprises a fuel-cell stack for generating electricity by using a fuel gas and an oxidizing gas; a combustion device for burning an off-gas of the fuel gas from the fuel-cell stack; and water recovering means for recovering a vapor of an exhaust gas resulting from combustion.
REFERENCES:
patent: 4743517 (1988-05-01), Cohen et al.
patent: 4820594 (1989-04-01), Sugita et al.
patent: 5360679 (1994-11-01), Buswell et al.
patent: 6106963 (2000-08-01), Nitta et al.
patent: 6-325780 (1994-11-01), None
Aisin Seiki Kabushiki Kaisha
Chaney Carol
Dove Tracy
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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