US5404708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for operating a gas and steam turbine plant and gas and steam turbine plant operating according to the method
Assignee: Siemens AG
•
Filing: 1993-07-15
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Granted: 1995-04-11
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Expires: 2013-07-15
Abstract
Abstract A method for operating a gas and steam turbine plant includes producing steam for a steam turbine by utilizing heat contained in pressure-relieved flue gas of a gas turbine, and decreasing the temperature of the pressure-relieved flue gas upon the onset of a critical operating state, by introducing water into the pressure-relieved flue gas. A gas and steam turbine plant includes a gas turbine having a flue gas conduit, a steam turbine having a water-steam loop, a steam generator being connected to the flue gas conduit downstream of the gas turbine for producing steam in the water-steam loop, and a device for introducing water into the flue gas conduit.
Inventors
- 👤 Ralf Sigling
- 👤 Ralf Spinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:08
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F01K23/106; F01K23/108; Y; Y02; Y02E; Y02E20/00; Y02E20/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A method for operating a gas and steam turbine plant, which comprises: producing steam for a steam turbine by utilizing heat contained in pressure-relieved flue gas of a gas turbine, in a gas and steam turbine plant; and decreasing the temperature of the pressure-relieved flue gas upon the onset of a critical operating state, by introducing water into the pressure-relieved flue gas as a function of a variation in the flue gas temperature.
Claim 2
Independent Claim
73 words
A method for operating a gas and steam turbine plant, which comprises: producing steam for a steam turbine by utilizing heat contained in pressure-relieved flue gas of a gas turbine, in a gas and steam turbine plant; and decreasing the temperature of the pressure-relieved flue gas upon the onset of a critical operating state, by introducing water into the pressure-relieved flue gas as a function of a variation in the flue gas temperature.
Claim 3
Dependent Claim
23 words
The method according to claim 1, which comprises introducing the water as a function of a travel-dependent variation in the flue gas temperature.
Claim 4
Dependent Claim
23 words
The method according to claim 1, which comprises introducing the water as a function of a time-dependent variation in the flue gas temperature.
Claim 5
Dependent Claim
24 words
The method according to claim 1, which comprises introducing the water as a function of travel and time-dependent variations in the flue gas temperature.
Claim 6
Dependent Claim
39 words
The method according to claim 1, which comprises adjusting the introduction of water to prevent the temperature of the flue gas upon exiting a steam generator connected downstream of the gas turbine from dropping below a predetermined minimum value.
Claim 7
Dependent Claim
24 words
The method according to claim 1, which comprises taking the water introduced into the flue gas from a water-steam loop of the steam turbine.
Claim 8
Dependent Claim
28 words
The method according to claim 1, which comprises taking the water introduced into the flue gas from a water connection for a combustion chamber of the gas turbine.
References Cited (Backward Citations)
US3369361A
Cited
US4437313A
Cited
JPS58192908A
Cited
EP0148973B1
Cited
JPS61171834A
Cited
US4572110A
Cited
US4893468A
Cited
US4875436A
Cited
JPH0336409A
Cited
JPH04161702A
Cited
US5282355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-10 | 1998-10-10 | 1999-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-10 | 2002-10-10 | 2003-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-10 | 2006-10-10 | 2007-04-11 | $7700.00 | Window Closed / Lapsed |