Power plants – Combustion products used as motive fluid – Process
Reexamination Certificate
2005-04-19
2005-04-19
Kim, Ted (Department: 3746)
Power plants
Combustion products used as motive fluid
Process
C060S775000, C060S039530, C060S726000
Reexamination Certificate
active
06880343
ABSTRACT:
A gas-turbine supercharging system with improved control. A gas-turbine supercharger that preferably comprises a variable-pitch axial flow fan and a logger supplies, cooled, pressurized air to a gas-turbine power plant. The gas-power plant is preferably a part of combined-cycle power plant that comprises a steam cycle and a duct burner. A controller modulates the output of the fogger and the supercharging fan to maximize the total plant output and provide optimum efficiency without exceeding plant operating limits. The fogger and fan are preferably selected to maximize the allowable output from gas turbine at summer peaking conditions. For the case of a combined-cycle power plant, the preferred mode of operation is to reduce fog output while maintaining a maximum fan pressure as ambient temperature drops below the maximum design value. For a simple-cycle gas turbine, the preferred mode of operation is to reduce pressure output of the supercharging fan while adjusting fog output to match the maximum allowable moisture content at the gas-turbine inlet. The control also reduces fog output at low ambient temperatures to prevent possible ice formation.
REFERENCES:
patent: 3796045 (1974-03-01), Foster-Pegg
patent: 4667465 (1987-05-01), Munk
patent: 4702074 (1987-10-01), Munk
patent: 4731990 (1988-03-01), Munk
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patent: 5622044 (1997-04-01), Bronicki et al.
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patent: 6308512 (2001-10-01), Kopko
patent: 6442942 (2002-09-01), Kopko
patent: 6530224 (2003-03-01), Conchieri
patent: 6718771 (2004-04-01), Kopko
Foster-Pegg R.W., “Supercharging of Gas Turbines by Forced Draft Fans with Evaporative Intercooling”, American Society of Mechanical Engineers, Jan. 7, 1965, pp. 1-12.
Kim Ted
Novak Druce DeLuca & Quigg LLP
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