US3832845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined gas and steam powerplant with supplementary steam mixing
Assignee: Sulzer AG
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Filing: 1973-08-28
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Granted: 1974-09-03
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Expires: 1993-08-28
Abstract
Abstract In addition to tapping off a flow of steam from the steam turbine for mixing into the combustion gas flow to the gas turbine in order to regulate the temperature of the combustion gas flow, the plant can be regulated to insure continued operation of the air compressor and generator at low loads. To this end, a supplementary means is provided to tap off steam for mixing into the gas flow when the load decreases. The decrease in load can be measured off the generator run by the gas turbine or the generator run by the steam turbine.
Inventors
- 👤 E Aguet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:54
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K21/00; F01K21/04; F01K21/042; F01K7/00; F01K7/16; F01K7/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
A gas and steam turbine plant comprising a compressor for compressing air, a charged steam generator connected to said compressor to receive compressed air therefrom, a gas turbine connected downstream of said charged steam generator to receive a flow of combustion gas therefrom, a steam turbine connected downstream of said charged steam generator to receive a flow of steam therefrom, conduit means extending from a first tap in said steam turbine for delivering a flow of steam into a mixing point between said charged steam generator and said gas turbine for mixing with the flow of combustion gas, a temperature responsive means for measuring the temperature of the combustion gas/steam flow delivered to said gas turbine and for regulating the amount of steam delivered to said mixing point in response to the measured temperature, and a supplementary means connected between said steam turbine and said gas turbine for supplying an increased quantity of steam to said gas turbine in response to a decreasing performance of the plant in a low load performance region of said plant.
Claim 2
Dependent Claim
176 words
A gas and steam turbine plant comprising a compressor for compressing air, a charged steam generator connected to said compressor to receive compressed air therefrom, a gas turbine connected downstream of said charged steam generator to receive a flow of combustion gas therefrom, a steam turbine connected downstream of said charged steam generator to receive a flow of steam therefrom, conduit means extending from a first tap in said steam turbine for delivering a flow of steam into a mixing point between said charged steam generator and said gas turbine for mixing with the flow of combustion gas, a temperature responsive means for measuring the temperature of the combustion gas/steam flow delivered to said gas turbine and for regulating the amount of steam delivered to said mixing point in response to the measured temperature, and a supplementary means connected between said steam turbine and said gas turbine for supplying an increased quantity of steam to said gas turbine in response to a decreasing performance of the plant in a low load performance region of said plant.
Claim 3
Dependent Claim
36 words
A gas and steam turbine plant as set forth in claim 1 wherein said supplementary means is connected to said mixing point for introducing the increased quantity of steam into the flow of combustion gas thereat.
Claim 4
Dependent Claim
53 words
A gas and steam turbine plant as set forth in claim 1 wherein said temperature responsive means includes a throttle means in said conduit means and said supplementary means is connected to said throttle means to open said throttle means in response to decreasing performance of said plant in said low load region.
Claim 5
Dependent Claim
40 words
A gas and steam turbine plant as set forth in claim 1 wherein said supplementary means is responsive to the output of said gas turbine whereby at decreasing performance an increased quantity of steam is supplied to said gas turbine.
Claim 6
Dependent Claim
40 words
A gas and steam turbine plant as set forth in claim 1 wherein said supplementary means is responsive to the speed of said gas turbine whereby at decreasing performance an increased quantity of steam is supplied to said gas turbine.
Claim 7
Dependent Claim
20 words
A gas and steam turbine plant as set forth in claim 4 wherein said supplementary means includes a limiting regulator.
Claim 8
Dependent Claim
40 words
A gas and steam turbine plant as set forth in claim 1 wherein said supplementary means is responsive to the output of said steam turbine whereby at decreasing performance an increased quantity of steam is supplied to said gas turbine
Claim 9
Dependent Claim
42 words
A gas and steam turbine plant as set forth in claim 7 wherein said supplementary means includes a function-transmitter for increasing the quantity of steam supplied to said gas turbine in proportionate relation with a decreasing performance below a preset limit performance.
Claim 10
Dependent Claim
43 words
A gas and steam turbine plant as set forth in claim 1 wherein said supplementary means is connected to a second tap in said steam turbine upstream of said first tap to supply steam at a higher pressure than at said first tap.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |