Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2005-03-29
2008-10-14
Kim, Ted (Department: 3746)
Power plants
Combustion products used as motive fluid
Process
C060S782000, C060S039182, C060S806000, C415S115000, C415S178000
Reexamination Certificate
active
07434402
ABSTRACT:
Aspects of the invention relate to a system and method for actively controlling compressor clearances in a turbine engine by passing a thermal fluid in heat exchanging relation through a compressor vane carrier. During some operational conditions, such as hot restart or spin cool, it may be desirable to heat the vane carrier to enlarge or at least prevent a decrease in compressor clearances. In such cases, a heated thermal fluid can be provided by reclaiming residual exhaust energy from a heat recovery steam generator. At any condition where improved performance is desired, such as at base load operation, the vane carrier can be cooled to minimize compressor clearances. A cooled thermal fluid can be bleed air from an upstream portion of the compressor, water-cooled high pressure bleed air from a downstream portion of the compressor, or feed water from the bottoming cycle in a combined cycle engine.
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Foust Adam Matthew
Paprotna Hubert Edward
Kim Ted
Siemens Power Generation, Inc.
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