Steam driven variable speed booster compressor for gas turbine

Details Steam driven variable speed booster compressor for gas turbine Steam driven variable speed booster compressor for gas turbine

1997-10-22

1999-12-21

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Multiple fluid-operated motors

60726, F02C 618

Patent

active

060032987

ABSTRACT:
A gas turbine engine that includes a steam driven variable speed booster compressor is described. In one embodiment, the engine includes a low pressure turbine and a booster compressor rotatable on a low pressure shaft. The engine further includes a high pressure compressor, a high pressure combustor, and a high pressure turbine rotatable on a high pressure (HP) shaft and forming the core engine. The output of the low pressure compressor is supplied to an intercooler, and the output of the intercooler is supplied to the high pressure compressor. The engine further includes a power turbine downstream of the high pressure turbine, and the power turbine is coupled to a generator by a shaft. The output exhaust of the power turbine is supplied to an exhaust heat boiler, and steam output by the boiler is supplied to, and drives, the low pressure turbine. Steam from the boiler may also be supplied to the high pressure combustor and to the power turbine. Since the steam is generated from the power turbine exhaust heat, the amount of steam flow can be independently varied from the gas turbine engine primary conditions, consistent of course with the gas turbine exhaust flow/temperature limitations.

REFERENCES:
patent: 2625012 (1953-01-01), Larrecq
patent: 4896499 (1990-01-01), Rice

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