F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
F01D 19/02 (2006.01) F01K 23/10 (2006.01) F22B 1/18 (2006.01) F22B 35/14 (2006.01)
Patent
CA 2110006
In a combined cycle power generation system which includes a gas turbine; a steam turbine; and a heat recovery steam generator which includes a superheater section and an evaporator section, and wherein condensate from the steam turbine is reheated in the heat recovery steam generator by exhaust gas from the gas turbine and returned via a main steam outlet to the steam turbine, a method of effecting start-up of the steam turbine comprising the steps of: a) dumping a portion of the gas turbine exhaust gas to atmosphere, while simultaneously introducing a remaining portion of the gas turbine exhaust gas to the heat recovery steam generator; b) with the main steam outlet from the heat recovery steam generator closed, extracting steam from an intermediate location in the superheater and supplying the extracted steam to the steam turbine at a temperature between about 550-1000°F; and, after the steam turbine is started and a warm-up cycle completed, c) terminating the extraction of steam from the intermediate location in the superheater and opening the main steam outlet from the heat recovery steam generator.
Lee Daniel T.
Tomlinson Leroy O.
Company General Electric
Craig Wilson And Company
LandOfFree
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