Method for maintaining a combined-cycle power station at...

Details Method for maintaining a combined-cycle power station at... Method for maintaining a combined-cycle power station at...

2005-02-08

2005-02-08

Freay, Charles G. (Department: 3746)

Power plants

Combustion products used as motive fluid

Process

C060S039182

Reexamination Certificate

active

06851266

ABSTRACT:
In a method for maintaining a combined-cycle power station at readiness, an supplemental firing (44) with a fresh air supply fan (46) and, preferably, the feed and supply pumps (21, 23, 31, 38) are operated continuously or intermittently when the combined-cycle power station is not in use, in order to maintain specific states and media flows in the two-phase circuit of the combined-cycle power station. In one embodiment of the invention, the media in the two-phase circuit are prevented from freezing by means of the supplemental firing. Furthermore, media states which prevent air from entering while the power station is not in use and which thus prevent corrosion damage can also be maintained. In addition to this protective maintenance of readiness, the supplemental firing is also used when the combined-cycle power station is not in use, in order to produce and maintain conditions which allow the combined-cycle power station to be started and loaded quickly.

REFERENCES:
patent: 4201924 (1980-05-01), Uram
patent: 5172553 (1992-12-01), Barton et al.
patent: 5678401 (1997-10-01), Kimura
patent: 6244033 (2001-06-01), Wylie
patent: 6286297 (2001-09-01), Wakazono et al.
patent: 0 768 449 (1997-04-01), None
patent: 0 889 204 (1999-01-01), None
patent: 0 889 204 (2001-09-01), None
patent: WO 02081870 (2002-10-01), None
Search Report in PCT/IB02/01117 dated Jul. 5, 2002.

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