Closed circuit air cooled gas turbine combined cycle
AssigneeGeneral Electric Company
InventorsLeroy O. Tomlinson, Raub W. Smith, John E. Sholes
Life of this patent
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Abstract
In a combined cycle system (10) which includes a gas turbine (12), a steam turbine (20); and at least one heat recovery steam generator (34) including evaporator(s) (38, 42, 46) operating at one or more pressures, and where condensate from the steam turbine (20) is evaporated by exhaust gas from the gas turbine (12) and returned to the steam turbine (20), the improvement comprising a closed loop cooling air circuit arranged such that hot cooling air from the gas turbine (12) is passed in heat exchange relationship with water from that one or more of the evaporators (46) in the heat recovery steam generator (34).
Claims10
In a combined cycle system which includes a gas turbine, a steam turbine, and at least one heat recovery steam generator where condensate from the steam turbine is evaporated by exhaust gas from the gas turbine and introduced into the steam turbine, the improvement comprising a closed loop cooling air circuit arranged to cool gas turbine parts wherein cooling air, after passing through the gas turbine, is passed in heat exchange relationship with water from an evaporator in the heat recovery steam generator so as to generate additional steam which is returned to said evaporator.
In a combined cycle system which includes a gas turbine, a steam turbine;
- and at least one heat recovery steam generator including at least one evaporator and where condensate from the steam turbine is evaporated by exhaust gas from the gas turbine and subsequently introduced into the steam turbine, the improvement comprising a closed loop cooling air circuit arranged to cool gas turbine parts wherein cooling air, after passing through the gas turbine is passed in heat exchange relationship with water from said at least one evaporator in the heat recovery steam generator, so as to generate additional steam which is returned to said at least one evaporator.
In a combined cycle system which includes a gas turbine, a steam turbine, and at least one heat recovery steam generator where condensate from the steam turbine is evaporated by exhaust gas from the gas turbine and introduced into the steam turbine, the improvement comprising a closed loop cooling air circuit arranged to cool gas turbine parts wherein cooling air, after passing through the gas turbine, is passed in heat exchange relationship with water from an evaporator in the heat recovery steam generator;
- and wherein said cooling air circuit includes an air path which receives makeup air from a gas turbine compressor discharge.
In a combined cycle system which includes a gas turbine, a steam turbine;
- and at least one heat recovery steam generator including at least one evaporator and where condensate from the steam turbine is evaporated by exhaust gas from the gas turbine and subsequently introduced into the steam turbine, the improvement comprising a closed loop cooling air circuit arranged to cool gas turbine parts wherein cooling air, after passing through the gas turbine is passed in heat exchange relationship with water from said at least one evaporator in the heat recovery steam generator;
- and wherein said cooling air circuit includes an air path which also receives makeup air from a gas turbine compressor discharge.
Dependencies are inferred from the claim text.