US5107673A
Expired / Lapsed
US
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Method for detecting combustion conditions in combustors
Assignee: Hitachi Ltd
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Filing: 1991-04-30
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Granted: 1992-04-28
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Expires: 2011-04-30
Abstract
Abstract A method for detecting combustion conditions in a plurality of combustors in a gas-turbine apparatus which includes the combustors and a gas turbine driven by combustion gas from the combustors, comprises a step for measuring concentration of unburnt component in the combustion gas by means of a plurality of sensors disposed on the downstream side of the gas turbine, a step for obtaining a distribution pattern of the measured concentration, and a step for investigating the distribution pattern to detect combustion conditions in the combustors.
Inventors
- 👤 Isao Sato
- 👤 Seiichi Kirikami
- 👤 Akira Shimura
- 👤 Fumiyuki Hirose
- 👤 Hiroshi Inose
- 👤 Haruo Urushidani
- 👤 Osamu Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:38
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/003; F05; F05D; F05D2270/00; F05D2270/01; F05D2270/08; F05D2270/083; F05D2270/0831; F23N2241/00; F23N2241/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A method for detecting combustion conditions in a plurality of combustors in a gas-turbine apparatus which includes a gas turbine driven by combustion gas from said combustors, said method comprising the steps of: measuring a concentration of at least one uncombusted component in said combustion gas by a plurality of sensors disposed on a downstream side of said gas turbine; obtaining a distribution pattern of said measured concentration; and examining said distribution pattern to detect combustion conditions in said combustors.
Claim 2
Independent Claim
80 words
A method for detecting combustion conditions in a plurality of combustors in a gas-turbine apparatus which includes a gas turbine driven by combustion gas from said combustors, said method comprising the steps of: measuring a concentration of at least one uncombusted component in said combustion gas by a plurality of sensors disposed on a downstream side of said gas turbine; obtaining a distribution pattern of said measured concentration; and examining said distribution pattern to detect combustion conditions in said combustors.
Claim 3
Dependent Claim
17 words
A detecting method according to claim 1, wherein said steps are repeated over a predetermined time period.
Claim 4
Dependent Claim
33 words
A detecting method according to claim 1, wherein the step of measuring includes measuring the combustion gas at a position at which the combustion gas from the combustors flows at an increased speed.
Claim 5
Dependent Claim
34 words
A detecting method according to claim 1, wherein the step of examining includes storing the distribution pattern in a memory means, and comparing said distribution pattern with distribution patterns prestored in said memory means.
Claim 6
Dependent Claim
100 words
A control method for controlling combustion in a plurality of combustors in a gas-turbine apparatus which includes a gas turbine driven by combustion gas from said combustors, said method comprising the steps of: measuring a concentration of at least one uncombusted component in said combustion gas by a plurality of sensors disposed on a downstream side of said gas turbine; obtaining a distribution pattern of said measured concentration; examining said distribution pattern to detect combustion conditions in said combustors; and adjusting flow rates of air and/or fuel to be fed to the respective combustors in dependence upon detected combustion conditions.
Claim 7
Dependent Claim
100 words
A control method for controlling combustion in a plurality of combustors in a gas-turbine apparatus which includes a gas turbine driven by combustion gas from said combustors, said method comprising the steps of: measuring a concentration of at least one uncombusted component in said combustion gas by a plurality of sensors disposed on a downstream side of said gas turbine; obtaining a distribution pattern of said measured concentration; examining said distribution pattern to detect combustion conditions in said combustors; and adjusting flow rates of air and/or fuel to be fed to the respective combustors in dependence upon detected combustion conditions.
Claim 8
Dependent Claim
57 words
A control method for controlling combustion according to claim 5, wherein each of said combustors includes a first stage combustion chamber and a second stage combustion chamber disposed downstream of said first stage combustion chamber, and wherein the step of adjusting includes adjusting flow rates of air and/or fuel fed to the respective second stage combustion chambers.
Claim 9
Dependent Claim
37 words
A control method for controlling combustion according to claim 6, wherein the step of examining includes storing the distribution pattern in a memory means, and comparing said distribution pattern with distribution patterns prestored in said memory means.
Claim 10
Dependent Claim
36 words
A control method for controlling combustion according to claim 5, wherein the step of measuring includes measuring the combustion gas at a position at which the combustion gas from the combustors flows at an increased speed.
Claim 11
Dependent Claim
37 words
A control method for controlling combustion according to claim 5, wherein the step of examining includes storing the distribution pattern in a memory means, and comparing said distribution pattern with distribution patterns prestored in said memory means.
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) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |