US5386687A
Expired / Lapsed
US
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Method of operating a gas turbine group
Assignee: Alstom SA
•
Filing: 1994-03-10
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Granted: 1995-02-07
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Expires: 2014-03-10
Abstract
Abstract In a method for operating a gas turbine group (32) having an integrated steam process (33) and having an air storage installation (34), a partial mass flow (17) is extracted from a high-pressure turbine (15) of the gas turbine group (32) and passed through a heat exchanger (20) for cooling one or a plurality of structures of the gas turbine group (32). This heat exchanger (20) is operated by a cooler medium (4, 6). The partial mass flow (17) cooled in this way is subsequently passed through the structures (18, 19) to be cooled of the gas turbine group (32). By this means, the cooling is achieved of, in particular, the structures installed downstream of the high-pressure turbine (15). The heat generator (18) connected downstream and the low-pressure turbine (19) can be connected in parallel or in series. It is therefore possible to achieve cooling of the loaded structures of the gas turbine group (32) without, in the process, affecting the working gas balance of the installation.
Inventors
- 👤 Hans U. Frutschi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
F; F02; F02C; F02C1/00; F02C7/00; F02C7/12; F02C7/16; F02C7/18; F02C7/185; Y; Y02; Y02E; Y02E20/00; Y02E20/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
A method of operating a gas turbine group, having at least one compressor, at least a high pressure gas turbine, a low pressure gas turbine and at least one electrical machine, comprising the steps of: operating a first heat generator upstream of the high pressure gas turbine; operating a second heat generator downstream of the high pressure gas turbine; extracting a partial mass flow from the high-pressure turbine; cooling this partial mass flow by a cooler medium; and, passing the cooled partial mass flow through the structures of at least one of the second heat generator and a low pressure turbine as a cooling medium.
Claim 2
Independent Claim
105 words
A method of operating a gas turbine group, having at least one compressor, at least a high pressure gas turbine, a low pressure gas turbine and at least one electrical machine, comprising the steps of: operating a first heat generator upstream of the high pressure gas turbine; operating a second heat generator downstream of the high pressure gas turbine; extracting a partial mass flow from the high-pressure turbine; cooling this partial mass flow by a cooler medium; and, passing the cooled partial mass flow through the structures of at least one of the second heat generator and a low pressure turbine as a cooling medium.
Claim 3
Dependent Claim
25 words
The method as claimed in claim 1, wherein the partial mass flow for cooling is passed through a heat exchanger through which flows an airflow.
Claim 4
Dependent Claim
28 words
The method as claimed in claim 2, wherein the airflow originates from at least one of a compressor of the gas turbine group and an air storage installation.
Claim 5
Dependent Claim
43 words
The method as claimed in claim 1, wherein the gas turbine group includes a steam turbine circuit, and wherein the partial mass flow for cooling is passed through a heat exchanger through which flows at least a partial flow of the steam circuit.
Claim 6
Dependent Claim
26 words
The method as claimed in claim 1, wherein the partial mass flow for cooling is passed through a heat exchanger through which flows a fuel flow.
Claim 7
Dependent Claim
24 words
The method as claimed in claim 1, wherein the partial mass flow is cooled by spraying in at least one of water and steam.
Claim 8
Dependent Claim
27 words
The method as claimed in claim 1, wherein the second heat generator an low pressure turbine to be cooled are cooled by the mass flow in parallel.
Claim 9
Dependent Claim
27 words
The method as claimed in claim 1, wherein the cooled partial mass flow is passed through a heat generator at the low-pressure end and a low-pressure turbine.
Claim 10
Dependent Claim
26 words
The method as claimed in claim 1, wherein the partial mass flow is passed through a cleaning unit before flowing through the structures to be cooled.
Claim 11
Dependent Claim
25 words
The method as claimed in claim 1, wherein the partial mass flow is passed through a fan before flowing through the structures to be cooled.
Claim 12
Dependent Claim
20 words
The method as claimed in claim 1, wherein the second heat generator and low pressure turbine are cooled in series.
Claim 13
Dependent Claim
48 words
The method as claimed in claim 1, wherein the partial mass flow is passed through a jet apparatus, in which steam is injected into the mass flow to cool the mass flow and increase the pressure, before the mass flow is passed through the structures to be cooled.
Claim 14
Dependent Claim
47 words
The method of operating a gas turbine group as claimed in claim 1, wherein the cooling medium is passed through the structures of the second heat generator and to the low pressure turbine in series before mixing with a working gas flowing through the low pressure turbine.
Claim 15
Dependent Claim
39 words
The method of operating a gas turbine group as claimed in claim 1, wherein the cooling medium is passed through the structure of the low pressure turbine before mixing with a working gas flowing through the low pressure turbine.
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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) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-06 | 2002-08-08 | 2003-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-06 | 2006-08-08 | 2007-02-07 | $7700.00 | Window Closed / Lapsed |