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

Patent · Tue Jan 01 04:00:00 EST 2002

OSTI ID:874190

Eldrid, Sacheverel Q ^[1]; Salamah, Samir A ^[2]; DeStefano, Thomas Daniel ^[3]

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1. Saratoga Springs, NY
2. Niskayuna, NY
3. Ballston Lake, NY

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.

• Research Organization: General Electric Company (Schenectady, NY)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6334295
• OSTI ID: 874190
• Country of Publication: United States
• Language: English

Related Subjects

/60/
assembly
bore
buckets
circuit
combined
concentric
conduit
cooling
cooling circuit
cycle
diffuser
drop
exhaust
flow
gas
gas turbine
generator
heat
intermediate
passage
passages
pressure
provided
recovery
reduce
reduced
reheat
return
rotating
rotor
spent
steam
steam generator
steam-cooled
supplies
supply
tube
turbine
unit
via