Method of water level control for a combined cycle power plant a

Details Method of water level control for a combined cycle power plant a Method of water level control for a combined cycle power plant a

1980-02-19

1982-10-12

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3918B, 122 7R, F02C 618

Patent

active

043532047

ABSTRACT:
A method and system for controlling water level of a drum of a heat recovery steam generator for a combined cycle power plant is provided. The combined cycle power plant includes gas and steam turbines and the steam generator for recovering heat in exhaust gases from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. At a start up operation, the water level of the drum is lowered in advance to the plant start up operation so that abrupt rise of the water level due to swelling phenomenon of the boiler water which may result in heat losses by damping water out of the plant is prevented. Also, a gas turbine load increase is maintained at a constant level during a period in which the abrupt water level rise is expected so that the swelling phenomenon is avoided.

REFERENCES:
patent: 2684664 (1954-07-01), Hillen
patent: 3955358 (1976-05-01), Martz et al.
patent: 4207842 (1980-06-01), Kehlhofer
patent: 4214450 (1980-07-01), Nagashima et al.

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