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Title: Apparatus and methods for supplying auxiliary steam in a combined cycle system

Abstract

To provide auxiliary steam, a low pressure valve is opened in a combined cycle system to divert low pressure steam from the heat recovery steam generator to a header for supplying steam to a second combined cycle's steam turbine seals, sparging devices and cooling steam for the steam turbine if the steam turbine and gas turbine lie on a common shaft with the generator. Cooling steam is supplied the gas turbine in the combined cycle system from the high pressure steam turbine. Spent gas turbine cooling steam may augment the low pressure steam supplied to the header by opening a high pressure valve whereby high and low pressure steam flows are combined. An attemperator is used to reduce the temperature of the combined steam in response to auxiliary steam flows above a predetermined flow and a steam header temperature above a predetermined temperature. The auxiliary steam may be used to start additional combined cycle units or to provide a host unit with steam turbine cooling and sealing steam during full-speed no-load operation after a load rejection.

Inventors:
 [1];  [1];  [2]
  1. Ballston Spa, NY
  2. Ballston Lake, NY
Issue Date:
Research Org.:
General Electric Co., Schenectady, NY (United States)
OSTI Identifier:
874600
Patent Number(s):
6422022
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01K - STEAM ENGINE PLANTS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; methods; supplying; auxiliary; steam; combined; cycle; provide; pressure; valve; divert; heat; recovery; generator; header; cycles; turbine; seals; sparging; devices; cooling; gas; lie; common; shaft; supplied; spent; augment; flows; attemperator; reduce; temperature; response; predetermined; flow; start; additional; units; host; unit; sealing; full-speed; no-load; operation; load; rejection; gas turbine; steam generator; steam flow; combined cycle; pressure steam; /60/122/

Citation Formats

Gorman, William G, Carberg, William George, and Jones, Charles Michael. Apparatus and methods for supplying auxiliary steam in a combined cycle system. United States: N. p., 2002. Web.
Gorman, William G, Carberg, William George, & Jones, Charles Michael. Apparatus and methods for supplying auxiliary steam in a combined cycle system. United States.
Gorman, William G, Carberg, William George, and Jones, Charles Michael. Tue . "Apparatus and methods for supplying auxiliary steam in a combined cycle system". United States. https://www.osti.gov/servlets/purl/874600.
@article{osti_874600,
title = {Apparatus and methods for supplying auxiliary steam in a combined cycle system},
author = {Gorman, William G and Carberg, William George and Jones, Charles Michael},
abstractNote = {To provide auxiliary steam, a low pressure valve is opened in a combined cycle system to divert low pressure steam from the heat recovery steam generator to a header for supplying steam to a second combined cycle's steam turbine seals, sparging devices and cooling steam for the steam turbine if the steam turbine and gas turbine lie on a common shaft with the generator. Cooling steam is supplied the gas turbine in the combined cycle system from the high pressure steam turbine. Spent gas turbine cooling steam may augment the low pressure steam supplied to the header by opening a high pressure valve whereby high and low pressure steam flows are combined. An attemperator is used to reduce the temperature of the combined steam in response to auxiliary steam flows above a predetermined flow and a steam header temperature above a predetermined temperature. The auxiliary steam may be used to start additional combined cycle units or to provide a host unit with steam turbine cooling and sealing steam during full-speed no-load operation after a load rejection.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}

Works referenced in this record:

Development Requirements for an Advanced Gas Turbine System
journal, October 1995


Advances in Steam Path Technology
journal, April 1996