Cooling/heating augmentation during turbine startup/shutdown using a seal positioned by thermal response of turbine parts and consequent relative movement thereof

Patent · Sat Jan 01 00:00:00 EST 2000

OSTI ID:873368

Schmidt, Mark Christopher ^[1]

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1. Niskayuna, NY

In a turbine rotor, a thermal mismatch between various component parts of the rotor occurs particularly during transient operations such as shutdown and startup. A thermal medium flows past and heats or cools one part of the turbine which may have a deleterious thermal mismatch with another part. By passively controlling the flow of cooling medium past the one part in response to relative movement of thermally responsive parts of the turbine, the flow of thermal medium along the flow path can be regulated to increase or reduce the flow, thereby to regulate the temperature of the one part to maintain the thermal mismatch within predetermined limits.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Co. (Schenectady, NY)
• Patent Number(s): US 6146090
• OSTI ID: 873368
• Country of Publication: United States
• Language: English

Related Subjects

cooling
heating
augmentation
turbine
startup
shutdown
seal
positioned
thermal
response
consequent
relative
movement
rotor
mismatch
various
component
occurs
particularly
transient
operations
medium
flows
past
heats
cools
deleterious
passively
controlling
flow
thermally
responsive
path
regulated
increase
reduce
regulate
temperature
maintain
predetermined
limits
thermal medium
medium flow
turbine rotor
cooling medium
flow path
relative movement
thermal mismatch
predetermined limits
thermally responsive
thermal response
various component
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