Fuel cell based power generation systems and methods of...

Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Process or means for control of operation

Reexamination Certificate

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Details

C429S413000, C429S414000, C429S429000, C429S427000, C429S428000, C429S436000, C429S437000, C429S442000

Reexamination Certificate

active

08043755

ABSTRACT:
A power generation system has a fuel cell stack and at least one condensation point in the system at which water present after shutdown of the power generation system can condense or collect. Drying after shutdown is improved by maintaining a temperature gradient between the condensation point and at least one other component in the power generation system after shutdown. In one embodiment, the temperature gradient is maintained by housing the fuel cell stack in a thermally insulated container and arranging the condensation point outside of the insulating container. In another embodiment, drying after shutdown is accomplished with an adsorption unit having a water-adsorbing material arranged in a desired location within the power generation system.

REFERENCES:
patent: 4120787 (1978-10-01), Yargeau
patent: 5753383 (1998-05-01), Cargnelli et al.
patent: 6492044 (2002-12-01), Walsh
patent: 2001/0035694 (2001-11-01), Roeser et al.
patent: 2002/0041984 (2002-04-01), Chow et al.
patent: 2003/0162063 (2003-08-01), Yoshizawa et al.
patent: 2003/0198851 (2003-10-01), Sone et al.
patent: 2004/0062961 (2004-04-01), Sato et al.
patent: 0 788 172 (1997-08-01), None
patent: 2003-142136 (2003-05-01), None
patent: WO 2005/010700 (2005-02-01), None
Form PCT/IPEA/416 (one (1) page) and Form PCT/IPEA/409 (twelve (12) pages) totaling (thirteen (13) pages), Apr. 23, 2004.

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