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Title: Rotating diffuser for pressure recovery in a steam cooling circuit of a gas turbine

Abstract

The buckets of a gas turbine are steam-cooled via a bore tube assembly having concentric supply and spent cooling steam return passages rotating with the rotor. A diffuser is provided in the return passage to reduce the pressure drop. In a combined cycle system, the spent return cooling steam with reduced pressure drop is combined with reheat steam from a heat recovery steam generator for flow to the intermediate pressure turbine. The exhaust steam from the high pressure turbine of the combined cycle unit supplies cooling steam to the supply conduit of the gas turbine.

Inventors:
 [1];  [2];  [3]
  1. Saratoga Springs, NY
  2. Niskayuna, NY
  3. Ballston Lake, NY
Issue Date:
Research Org.:
General Electric Co., Schenectady, NY (United States)
OSTI Identifier:
874190
Patent Number(s):
6334295
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01K - STEAM ENGINE PLANTS
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
DOE Contract Number:  
FC21-95MC31176
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
rotating; diffuser; pressure; recovery; steam; cooling; circuit; gas; turbine; buckets; steam-cooled; via; bore; tube; assembly; concentric; supply; spent; return; passages; rotor; provided; passage; reduce; drop; combined; cycle; reduced; reheat; heat; generator; flow; intermediate; exhaust; unit; supplies; conduit; gas turbine; steam generator; cooling circuit; /60/

Citation Formats

Eldrid, Sacheverel Q, Salamah, Samir A, and DeStefano, Thomas Daniel. Rotating diffuser for pressure recovery in a steam cooling circuit of a gas turbine. United States: N. p., 2002. Web.
Eldrid, Sacheverel Q, Salamah, Samir A, & DeStefano, Thomas Daniel. Rotating diffuser for pressure recovery in a steam cooling circuit of a gas turbine. United States.
Eldrid, Sacheverel Q, Salamah, Samir A, and DeStefano, Thomas Daniel. Tue . "Rotating diffuser for pressure recovery in a steam cooling circuit of a gas turbine". United States. https://www.osti.gov/servlets/purl/874190.
@article{osti_874190,
title = {Rotating diffuser for pressure recovery in a steam cooling circuit of a gas turbine},
author = {Eldrid, Sacheverel Q and Salamah, Samir A and DeStefano, Thomas Daniel},
abstractNote = {The buckets of a gas turbine are steam-cooled via a bore tube assembly having concentric supply and spent cooling steam return passages rotating with the rotor. A diffuser is provided in the return passage to reduce the pressure drop. In a combined cycle system, the spent return cooling steam with reduced pressure drop is combined with reheat steam from a heat recovery steam generator for flow to the intermediate pressure turbine. The exhaust steam from the high pressure turbine of the combined cycle unit supplies cooling steam to the supply conduit of the gas turbine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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