Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2005-06-07
2005-06-07
Casaregola, Louis J. (Department: 3746)
Power plants
Combustion products used as motive fluid
Process
C060S740000, C060S785000
Reexamination Certificate
active
06901761
ABSTRACT:
A pilot air system for providing pilot air to a combustor of a gas turbine wherein the system includes: an inlet to receive a portion of compressed air discharged by a compressor of the gas turbine, wherein the portion of the compressed air is pilot air; a main passageway coupled to the inlet and providing a passage for the pilot air; an inline throttling valve coupled to the main passageway and metering a pressure of the compressed air in the main passageway; a pilot air compressor in series with the main passageway; a by-pass passageway for the pilot air and arranged in parallel to the main passageway and compressor, wherein the by-pass passageway receives pilot air from the main passageway downstream of the compressor and passes a portion of the compressed pilot air to the main passageway upstream of the compressor; a by-pass throttling valve inline with the by-pass passageway to meter pilot air flowing through said by-pass passageway, and the main passageway is connectable to the combustor.
REFERENCES:
patent: 5185997 (1993-02-01), Nishijima
patent: 6393826 (2002-05-01), Yamanaka et al.
patent: 6792762 (2004-09-01), Yamanaka et al.
Berkeley Dalero Winston
Black Michael Paul
Dean Doug
McLeod Robert A.
Casaregola Louis J.
General Electric Company
Nixon & Vanderhye P.C.
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