Combined cycle electric power plant with coordinated plural feed

Details Combined cycle electric power plant with coordinated plural feed Combined cycle electric power plant with coordinated plural feed

1975-04-02

1980-01-22

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Multiple fluid-operated motors

122 7B, F02C 702

Patent

active

041843240

ABSTRACT:
A combined cycle electric power plant includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes a superheater tube through which a fluid, e.g. water, is directed to be additionally heated into superheated steam by the exhaust gas turbine gases. An afterburner further heats the exhaust gas turbine gases passed to the superheater tube. The temperature of the gas turbine exhaust gases is sensed for varying the fuel flow to the afterburner by a fuel valve, whereby the temperatures of the gas turbine exhaust gases and therefore of the superheated steam, are controlled. A plant load demand error signal is utilized for correcting a coordinated gas turbine load reference and for trimming a feedforward afterburner control signal derived from the sensed gas turbine exhaust temperatures.

REFERENCES:
patent: 3552872 (1971-01-01), Giras et al.
patent: 3762162 (1973-10-01), Miura et al.
patent: 3866109 (1975-02-01), Reed et al.
patent: 3879616 (1975-04-01), Baker et al.

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