Method of operating a gas-turbine group

Details Method of operating a gas-turbine group Method of operating a gas-turbine group

1995-11-03

1997-06-03

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3904, 60 3917, 60 3927, F02C 954

Patent

active

056343272

ABSTRACT:
In a method of operating a gas-turbine group having sequential combustion, action is taken first of all on the inlet temperatures (A, B) at the two turbines (6, 10) in order to provide a partial-load operation. The subsequent lowering of the load takes place by adjustment of the compressor guide blades (C), that is, by reducing the mass flow (E) to below 50% of the rated load (X). During this lowering, the inlet temperature (A) at the first turbine (6) is kept constant, while the other inlet temperature (B) at the second turbine (10) is continuously lowered; the outlet temperature (D) of the second turbine (10) is in contrast kept constant. After the lowering of the load is complete by adjusting the compressor guide blades, the inlet temperatures (A, B) are reduced directly or in a phase-displaced manner (Y).

REFERENCES:
patent: 2544235 (1951-03-01), Pfenninger
patent: 2605610 (1952-08-01), Hermitte et al.
patent: 2654217 (1953-10-01), Rettaliata
patent: 4270342 (1981-06-01), Zaugg
patent: 4529887 (1985-07-01), Johnson
patent: 5454220 (1995-10-01), Althaus et al.
patent: 5481865 (1996-01-01), Frutschi

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