Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2008-04-08
2008-04-08
Rodriguez, William H. (Department: 3746)
Power plants
Combustion products used as motive fluid
Process
C060S039300, C060S039281
Reexamination Certificate
active
10860328
ABSTRACT:
A gas turbine unit and method of operation thereof are disclosed. A very quick and easily controllable augmentation or reduction of shaft power produced by the gas turbine unit, in particular of large gas turbine units exhibiting a pressure ratio larger than 15 bar, is achieved by providing at least one liquid droplet injection device on the upstream side of the compressor for injecting liquid into the stream of intake air. The injection device allows the addition of liquid mass flow in the form of liquid droplets corresponding to the desired increase of shaft power. The amount of water mass flow corresponding to the desired increase or decrease of shaft power output is added or reduced in a substantially stepless manner immediately within a time interval determined by design characteristics of the injection device. Water mass flow is preferentially injected substantially across the entire cross-section of the intake air guide.
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S. Brusca et al., “Fogging for Evaporative Cooling Effects on Siemens V94.2 Gas Turbine Performance,” Proceedings of IJPGC'02, 2002 International Joint Power Generation Conference, Phoenix, AZ, USA, Jun. 24-26, 2002, IJPGC2002-26189, American Society of Mechanical Engineers.
Elliott Smith et a
Bolis Giacomo
Hagström Gustav
Hoffmann Jürgen
Wasmuth Thorsten
ALSTOM Technology Ltd
Rodriguez William H.
Steptoe & Johnson LLP
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