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Title: Apparatus and methods of reheating gas turbine cooling steam and high pressure steam turbine exhaust in a combined cycle power generating system

Abstract

In a combined cycle system having a multi-pressure heat recovery steam generator, a gas turbine and steam turbine, steam for cooling gas turbine components is supplied from the intermediate pressure section of the heat recovery steam generator supplemented by a portion of the steam exhausting from the HP section of the steam turbine, steam from the gas turbine cooling cycle and the exhaust from the HP section of the steam turbine are combined for flow through a reheat section of the HRSG. The reheated steam is supplied to the IP section inlet of the steam turbine. Thus, where gas turbine cooling steam temperature is lower than optimum, a net improvement in performance is achieved by flowing the cooling steam exhausting from the gas turbine and the exhaust steam from the high pressure section of the steam turbine in series through the reheater of the HRSG for applying steam at optimum temperature to the IP section of the steam turbine.

Inventors:
 [1];  [2]
  1. (Niskayuna, NY)
  2. (Ballston Lake, NY)
Publication Date:
Research Org.:
General Electric Company (Schenectady, NY)
OSTI Identifier:
874471
Patent Number(s):
US 6397575
Assignee:
General Electric Company (Schenectady, NY) NETL
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; methods; reheating; gas; turbine; cooling; steam; pressure; exhaust; combined; cycle; power; generating; multi-pressure; heat; recovery; generator; components; supplied; intermediate; section; supplemented; portion; exhausting; hp; flow; reheat; hrsg; reheated; inlet; temperature; optimum; net; improvement; performance; achieved; flowing; series; reheater; applying; gas turbine; steam generator; heating gas; cycle power; steam turbine; combined cycle; pressure steam; turbine exhaust; /60/

Citation Formats

Tomlinson, Leroy Omar, and Smith, Raub Warfield. Apparatus and methods of reheating gas turbine cooling steam and high pressure steam turbine exhaust in a combined cycle power generating system. United States: N. p., 2002. Web.
Tomlinson, Leroy Omar, & Smith, Raub Warfield. Apparatus and methods of reheating gas turbine cooling steam and high pressure steam turbine exhaust in a combined cycle power generating system. United States.
Tomlinson, Leroy Omar, and Smith, Raub Warfield. Tue . "Apparatus and methods of reheating gas turbine cooling steam and high pressure steam turbine exhaust in a combined cycle power generating system". United States. https://www.osti.gov/servlets/purl/874471.
@article{osti_874471,
title = {Apparatus and methods of reheating gas turbine cooling steam and high pressure steam turbine exhaust in a combined cycle power generating system},
author = {Tomlinson, Leroy Omar and Smith, Raub Warfield},
abstractNote = {In a combined cycle system having a multi-pressure heat recovery steam generator, a gas turbine and steam turbine, steam for cooling gas turbine components is supplied from the intermediate pressure section of the heat recovery steam generator supplemented by a portion of the steam exhausting from the HP section of the steam turbine, steam from the gas turbine cooling cycle and the exhaust from the HP section of the steam turbine are combined for flow through a reheat section of the HRSG. The reheated steam is supplied to the IP section inlet of the steam turbine. Thus, where gas turbine cooling steam temperature is lower than optimum, a net improvement in performance is achieved by flowing the cooling steam exhausting from the gas turbine and the exhaust steam from the high pressure section of the steam turbine in series through the reheater of the HRSG for applying steam at optimum temperature to the IP section of the steam turbine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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