Apparatus and methods for supplying auxiliary steam in a combined cycle system
Patent
·
OSTI ID:874600
- Ballston Spa, NY
- Ballston Lake, NY
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.
- Research Organization:
- General Electric Company (Schenectady, NY)
- DOE Contract Number:
- FC21-95MC31176
- Assignee:
- General Electric Company (Schenectady, NY)
- Patent Number(s):
- US 6422022
- OSTI ID:
- 874600
- Country of Publication:
- United States
- Language:
- English
Advances in Steam Path Technology
|
journal | April 1996 |
Development Requirements for an Advanced Gas Turbine System
|
journal | October 1995 |
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Related Subjects
/60/122/
additional
apparatus
attemperator
augment
auxiliary
combined
combined cycle
common
cooling
cycle
cycles
devices
divert
flow
flows
full-speed
gas
gas turbine
generator
header
heat
host
lie
load
methods
no-load
operation
predetermined
pressure
pressure steam
provide
recovery
reduce
rejection
response
sealing
seals
shaft
sparging
spent
start
steam
steam flow
steam generator
supplied
supplying
temperature
turbine
unit
units
valve
additional
apparatus
attemperator
augment
auxiliary
combined
combined cycle
common
cooling
cycle
cycles
devices
divert
flow
flows
full-speed
gas
gas turbine
generator
header
heat
host
lie
load
methods
no-load
operation
predetermined
pressure
pressure steam
provide
recovery
reduce
rejection
response
sealing
seals
shaft
sparging
spent
start
steam
steam flow
steam generator
supplied
supplying
temperature
turbine
unit
units
valve