Freeze prevention of a fuel cell power plant

Details Freeze prevention of a fuel cell power plant Freeze prevention of a fuel cell power plant

2007-09-11

2007-09-11

Drodge, Joseph (Department: 1723)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C137S059000, C204S229400, C204S633000, C210S143000, C210S243000, C165S200000, C429S006000

Reexamination Certificate

active

10470043

ABSTRACT:
A fuel cell power plant comprises a water circulation passage (5) which circulates the cooling water in a fuel cell stack (4). Sodium hydroxide which lowers the melting point of water is mixed with water in the water circulation passage (5) to prevent freezing of the water in the water circulation passage (5). Electrodes (11, 12) are disposed in the water. When the fuel cell stack (4) is running, a voltage is applied between the electrodes (11, 12) such that the positive electrode (11) attracts sodium ions, thereby removing sodium ions from the cooling water supplied to the fuel cell stack (4). When the fuel cell stack (4) stops running, sodium ions which were attracted to the positive electrode (11) are made to diffuse into the cooling water by ceasing to apply the voltage to the electrodes (11, 12).

REFERENCES:
patent: 3470865 (1969-10-01), Mekjean
patent: 4344850 (1982-08-01), Grasso
patent: 4427507 (1984-01-01), van Aken et al.
patent: 4678724 (1987-07-01), McElroy
patent: 4818638 (1989-04-01), Roy
patent: 5174902 (1992-12-01), Shubert et al.
patent: 5194159 (1993-03-01), George et al.
patent: 5817889 (1998-10-01), Pondebat et al.
patent: 6068941 (2000-05-01), Fuller et al.
patent: 6187197 (2001-02-01), Haddock
patent: 6361891 (2002-03-01), Breault et al.
patent: 6416891 (2002-07-01), Condit et al.
patent: 6440595 (2002-08-01), Herdeg et al.
patent: 6448535 (2002-09-01), Ap
patent: 6534210 (2003-03-01), Luken et al.
patent: 6607694 (2003-08-01), Blakemore et al.
patent: 6699612 (2004-03-01), Breault et al.
patent: 2002/0114984 (2002-08-01), Edlund et al.
patent: 2004/0028963 (2004-02-01), Kormann et al.
patent: 100 00 514 (2001-08-01), None
patent: 0 982 283 (2000-03-01), None
patent: 1 061 600 (2000-12-01), None
patent: 08-185877 (1996-07-01), None
patent: P2000-315514 (2000-11-01), None
patent: P2001-15139 (2001-01-01), None
patent: P2002-295848 (2002-10-01), None
patent: 250 041 (2000-04-01), None
patent: WO 01/31726 (2001-05-01), None

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