Partial regenerative dual fluid cycle gas turbine assembly

Details Partial regenerative dual fluid cycle gas turbine assembly Partial regenerative dual fluid cycle gas turbine assembly

1994-01-25

1995-05-23

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3958, 60 3959, F02C 330

Patent

active

054170532

ABSTRACT:
A partial regenerative dual fluid cycle gas turbine assembly can reduce the amount of steam injected to the combustor and can reduce the pressure loss in the heat exchanger and in pipes around the heat exchanger, thereby improving the efficiency of the gas turbine. The partial regenerative dual fluid cycle gas turbine assembly has a gas turbine unit including a compressor for compressing air, a combustor for burning fuel, and a turbine, driven by the combustion gas, for driving the compressor. A steam-driven mixer boosts the air and mixes the steam and the air. A heat exchanger is arranged downstream of the turbine for heating the mixed gas from the mixer with heat from the turbine exhaust gas. A heat recovery steam generator is arranged downstream of the heat exchanger for producing steam with heat from the exhaust gas. An air line is provided for introducing a first portion of the compressed air from the compressor to the combustor and for introducing a second portion of the compressed air to the mixer. A main steam line is provided for introducing a portion of the steam from the heat recovery steam generator to the mixer. A mixed gas line is provided for introducing the mixed gas from the mixer to the combustor via the heat exchanger. The mixer can include either a steam turbine-driven compressor or an ejector. A second portion of the steam produced by the heat recovery steam generator can be segregated for use by external utilities.

REFERENCES:
patent: 2482819 (1949-09-01), Williams
patent: 3353360 (1967-11-01), Gorzegno
patent: 4041699 (1977-08-01), Schelp
patent: 4653268 (1987-03-01), Nakamura et al.
patent: 4660367 (1987-04-01), Johnson
patent: 5271216 (1993-12-01), Frutschi et al.
Power, vol. 133, No. 6, 1 Jun. 1989, New York US, pp. 43-48, Makanski, "Brayton Cycles Challenge Rankine for Dominance", Fig. 3.

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