Steam-augmented gas turbine

Details Steam-augmented gas turbine Steam-augmented gas turbine

1993-05-21

1994-07-19

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3907, 60 3917, 60 393, 60 3955, F02C 330

Patent

active

053297580

ABSTRACT:
A steam-augmented gas turbine engine system generally includes a compressor 3), first and second combustors (4a, 4b), a compressor turbine (6) and a power turbine (7). A heat exchanging system (8b) removes heat from an exhaust product from the power turbine (7) and preheats water which has been desalinated by a water purification system (12). The desalinated water is provided to the first combustor (4a), as a predetermined quantity of water-steam mass, along with fuel and compressed air, and is used to efficiently power the turbine system. In one embodiment, a two-boiler system (8b) is employed in which first and second steam outputs are provided to first and second combustors (4a, 4b) such that a mass flow of the compressor turbine (6) is substantially constant from a Cheng point to a stoichiometric point of a predetermined power profile. This constancy of mass flow ensures that the gas generator operates on design from the Cheng point to the stoichiometric combustion point. Additionally, the free-power-turbine (7) always operates on design.

REFERENCES:
patent: 4297841 (1981-11-01), Cheng
patent: 4509324 (1985-04-01), Urbach et al.
patent: 4569195 (1986-02-01), Johnson
patent: 4631914 (1986-12-01), Hines
patent: 4823546 (1989-04-01), Cheng
patent: 4841721 (1989-06-01), Patton et al.
patent: 4899537 (1990-02-01), Cheng
patent: 4899537 (1990-02-01), Cheng

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