Patent US5442908A successfully refreshed from Google Patents.
US5442908A
Expired / Lapsed
US
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Combined combustion and steam turbine power plant
Assignee: Siemens Energy Inc
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Filing: 1994-05-04
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Granted: 1995-08-22
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Expires: 2014-05-04
Abstract
Abstract A combined combustion and steam turbine power plant which includes a steam turbine unit, a boiler unit for supplying steam to the steam turbine unit, and a combustion turbine unit with an exhaust gas duct structure for supplying the turbine exhaust gases to the boiler unit, has at least one heat recovery steam generator arranged in the exhaust gas flow downstream of the boiler unit and connected to the steam-turbine unit so as to supply any steam generated in the heat recovery steam generator to the steam turbine unit.
Inventors
- 👤 Michael S. Briesch
- 👤 Michael A. Costanzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:02
CPC Classifications
F; F01; F01D; F01D1/00; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F01K23/103; F01K23/106; Y; Y02; Y02E; Y02E20/00; Y02E20/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A combined cycle power plant, comprising: a steam turbine; a boiler unit for generating and supplying a first source of steam to said steam turbine unit; a combustion turbine unit with an exhaust gas duct structure for supplying the combustion turbine exhaust gases to said boiler unit and an exhaust gas stack for discharging the exhaust gases into the atmosphere, said duct structure including at least one heat recovery steam generator disposed in the flow of exhaust gas discharged through said exhaust gas stack, said heat recovery steam generator being connected to said steam turbine unit for generating and supplying a second source of steam to said steam turbine unit; a boiler fuel supply; and means for combusting said boiler fuel supply for increasing the boiler temperature independent of the temperature of the exhaust gases from said combustion turbine.
Claim 2
Dependent Claim
139 words
A combined cycle power plant, comprising: a steam turbine; a boiler unit for generating and supplying a first source of steam to said steam turbine unit; a combustion turbine unit with an exhaust gas duct structure for supplying the combustion turbine exhaust gases to said boiler unit and an exhaust gas stack for discharging the exhaust gases into the atmosphere, said duct structure including at least one heat recovery steam generator disposed in the flow of exhaust gas discharged through said exhaust gas stack, said heat recovery steam generator being connected to said steam turbine unit for generating and supplying a second source of steam to said steam turbine unit; a boiler fuel supply; and means for combusting said boiler fuel supply for increasing the boiler temperature independent of the temperature of the exhaust gases from said combustion turbine.
Claim 3
Dependent Claim
37 words
A power plant according to claim 1, wherein said steam turbine unit comprises a high pressure, an intermediate pressure and a low pressure turbine and said heat recovery steam generator is connected to said intermediate pressure turbine.
Claim 4
Dependent Claim
39 words
A power plant according to claim 2, wherein said heat recovery steam generator is connected to said intermediate pressure turbine via a steam superheater arranged in the flow of said combustion gas upstream of said heat recovery steam generator.
Claim 5
Dependent Claim
67 words
A power plant according to claim 3, wherein another heat recovery steam generator is disposed in the flow of exhaust gas downstream of said one heat recovery steam generator and is operated at a temperature and pressure lower than said one heat recovery steam generator, the other heat recovery steam generator being connected to said low pressure turbine for delivering its steam to said low pressure turbine.
Claim 6
Dependent Claim
40 words
A power plant according to claim 4, wherein said other heat recovery steam generator is connected to said low pressure turbine via at least one superheater arranged in said exhaust gas flow upstream of said one heat recovery steam generator.
Claim 7
Dependent Claim
30 words
The power plant according to claim 1, wherein said duct structure further comprises a damper for controlling the interaction of the exhaust gases from said combustion turbine with said boiler.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-21 | 1999-02-20 | 1999-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-21 | 2003-02-20 | 2003-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-21 | 2007-02-20 | 2007-08-22 | $7700.00 | Window Closed / Lapsed |