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Title: Heat recovery steam generator outlet temperature control system for a combined cycle power plant

Abstract

This patent describes a command cycle electrical power plant including: a steam turbine and at least one set comprising a gas turbine, an afterburner and a heat recovery steam generator having an attemperator for supplying from an outlet thereof to the steam turbine superheated steam under steam turbine operating conditions requiring predetermined superheated steam temperature, flow and pressure; with the gas turbine and steam turbine each generating megawatts in accordance with a plant load demand; master control means being provided for controlling the steam turbine and the heat recovery steam generator so as to establish the steam operating conditions; the combination of: first control means responsive to the gas inlet temperature of the heat recovery steam generator and to the plant load demand for controlling the firing of the afterburner; second control means responsive to the superheated steam predetermined temperature and to superheated steam temperature from the outlet for controlling the attemperator between a closed and an open position; the first and second control means being operated concurrently to maintain the superheated steam outlet temperature while controlling the load of the gas turbine independently of the steam turbine operating conditions.

Inventors:
; ; ;
Publication Date:
OSTI Identifier:
5827501
Patent Number(s):
US 4578944
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 25 Oct 1984
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; COMBINED-CYCLE POWER PLANTS; HEAT RECOVERY EQUIPMENT; STEAM GENERATORS; CONTROL SYSTEMS; HEAT RECOVERY; TEMPERATURE CONTROL; AFTERBURNERS; COMBUSTION CONTROL; FLOW RATE; GAS TURBINES; PRESSURE DEPENDENCE; STEAM TURBINES; SUPERHEATING; TEMPERATURE EFFECTS; BOILERS; CONTROL; ENERGY RECOVERY; EQUIPMENT; HEATING; MACHINERY; POLLUTION CONTROL EQUIPMENT; POWER PLANTS; RECOVERY; THERMAL POWER PLANTS; TURBINES; TURBOMACHINERY; VAPOR GENERATORS; 200105* - Fossil-Fueled Power Plants- Heat Utilization; 200104 - Fossil-Fueled Power Plants- Components

Citation Formats

Martens, A, Myers, G A, McCarty, W L, and Wescott, K R. Heat recovery steam generator outlet temperature control system for a combined cycle power plant. United States: N. p., 1986. Web.
Martens, A, Myers, G A, McCarty, W L, & Wescott, K R. Heat recovery steam generator outlet temperature control system for a combined cycle power plant. United States.
Martens, A, Myers, G A, McCarty, W L, and Wescott, K R. 1986. "Heat recovery steam generator outlet temperature control system for a combined cycle power plant". United States.
@article{osti_5827501,
title = {Heat recovery steam generator outlet temperature control system for a combined cycle power plant},
author = {Martens, A and Myers, G A and McCarty, W L and Wescott, K R},
abstractNote = {This patent describes a command cycle electrical power plant including: a steam turbine and at least one set comprising a gas turbine, an afterburner and a heat recovery steam generator having an attemperator for supplying from an outlet thereof to the steam turbine superheated steam under steam turbine operating conditions requiring predetermined superheated steam temperature, flow and pressure; with the gas turbine and steam turbine each generating megawatts in accordance with a plant load demand; master control means being provided for controlling the steam turbine and the heat recovery steam generator so as to establish the steam operating conditions; the combination of: first control means responsive to the gas inlet temperature of the heat recovery steam generator and to the plant load demand for controlling the firing of the afterburner; second control means responsive to the superheated steam predetermined temperature and to superheated steam temperature from the outlet for controlling the attemperator between a closed and an open position; the first and second control means being operated concurrently to maintain the superheated steam outlet temperature while controlling the load of the gas turbine independently of the steam turbine operating conditions.},
doi = {},
url = {https://www.osti.gov/biblio/5827501}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 1986},
month = {Tue Apr 01 00:00:00 EST 1986}
}