Power plants – Combustion products used as motive fluid
Patent
1989-06-01
1990-12-11
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
60 39182, 60657, F02C 618
Patent
active
049761005
ABSTRACT:
A system and method are provided for recovering heat from the exhaust gas of a gas turbine operating in a combined cycle power plant. Heat is recovered by transferring it to feedwater supplied to a heat recovery steam generator. The heat recovery steam generator generates steam for expansion in a steam turbine, thereby producing additional rotating shaft power, and injection into the combustor of the gas turbine, thereby reducing nitrogen oxides in the exhaust gas. Feedwater from the condenser is entered directly into a feedwater heater in the heat recovery steam generator, thus avoiding the use of steam for feedwater heating. Acid corrosion is avoided by regulating the heat transferred from the exhaust gas to the feedwater heater in the event high sulfur fuel is burned in the gas turbine combustor.
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R. W. Foster-Pegg, "Cogeneration-Interactions of Gas Turbine, Boiler and Steam Turbine", American Society of Mechanical Engineering, Paper No. 84-JPGC-GT-12, 1984.
Casaregola Louis J.
Westinghouse Electric Corp.
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