US6708497B2
Expired / Lapsed
US
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Gas turbine installation and an associated operating method
Assignee: GE Vernova GmbH
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Filing: 2002-06-28
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Granted: 2004-03-23
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Expires: 2022-06-28
Abstract
Abstract The invention relates to a method of operating a gas turbine installation ( 1 ), compressed fresh air ( 6, 19, 38 ) is branched off after a compressor ( 2 ) and supplied to an evaporator device ( 14 ), in the evaporator device ( 14 ) feed water ( 17, 26, 28 ) is evaporated, while heat is supplied, and is mixed with the fresh air ( 6, 19, 38 ) in order to generate a steam/air mixture ( 22, 37 ), the steam/air mixture ( 22, 37 ) is fed back upstream of a gas turbine ( 10 ), the heat required for the evaporation of the feed water ( 17, 26, 28 ) is at least partially extracted from an exhaust gas ( 12 ) of the gas turbine ( 10 ). In order to improve the efficiency of the gas turbine installation ( 1 ), the feed water ( 17, 26, 28 ) runs down along a wall arrangement ( 39 ) heated by the exhaust gas ( 12 ) and is subjected to the fresh air ( 6, 19, 38 ). The feed water ( 17, 26, 28 ) evaporates and mixes with the fresh air ( 6, 19, 38 ), by which means the steam/air mixture ( 22, 37 ) forms for the recirculation.
Inventors
- 👤 Klaus Doebbeling
- 👤 Hans-Erik Hansson
- 👤 Dieter Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
F; F01; F01K; F01K21/00; F01K21/04; F01K21/047
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
141 words
A method of operating a gas turbine installation, in which compressed fresh air is branched off after or from a compressor and supplied to an evaporator device, in which, in the evaporator device, feed water is evaporated, while heat is supplied, and is mixed with the fresh air in order to generate a steam/air mixture, in which the steam/air mixture is fed back upstream of a gas turbine, in which the heat required for the evaporation of the feed water is at least partially extracted from an exhaust gas of the gas turbine, wherein the feed water runs down a wall arrangement heated by the exhaust gas and is subjected to the fresh air, the feed water evaporating and mixing with the fresh air and forming a steam/air mixture, part at least of which is supplied to the gas turbine installation.
Claim 2
Independent Claim
141 words
A method of operating a gas turbine installation, in which compressed fresh air is branched off after or from a compressor and supplied to an evaporator device, in which, in the evaporator device, feed water is evaporated, while heat is supplied, and is mixed with the fresh air in order to generate a steam/air mixture, in which the steam/air mixture is fed back upstream of a gas turbine, in which the heat required for the evaporation of the feed water is at least partially extracted from an exhaust gas of the gas turbine, wherein the feed water runs down a wall arrangement heated by the exhaust gas and is subjected to the fresh air, the feed water evaporating and mixing with the fresh air and forming a steam/air mixture, part at least of which is supplied to the gas turbine installation.
Claim 3
Dependent Claim
27 words
The method as claimed in claim 1 , wherein the wall arrangement is subjected to the fresh air and the exhaust gas according to the counterflow principle.
Claim 4
Dependent Claim
41 words
The method as claimed in claim 1 , wherein the feed water is preheated upstream of the wall arrangement in a first heat exchanger, which is subjected to the fresh air before the wall arrangement is subjected to the fresh air.
Claim 5
Dependent Claim
48 words
The method as claimed in claim 1 , wherein the feed water is preheated upstream of the wall arrangement and, in particular, upstream of the first heat exchanger in a second heat exchanger, which is subjected to the exhaust gas after the latter has heated the wall arrangement.
Claim 6
Dependent Claim
38 words
The method as claimed in claim 1 , wherein the steam/air mixture is superheated upstream of the wall arrangement in a third heat exchanger, which is subjected to the exhaust gas before the latter heats the wall arrangement.
Claim 7
Dependent Claim
162 words
A gas turbine installation, comprising a gas turbine with steam/air injection, a device for recovering the heat from the exhaust gas of the gas turbine, an evaporator device for generating a steam/air mixture, a compressor for generating compressed fresh air, the evaporator device being supplied with feed water, compressed fresh air from the compressor and heat from the exhaust gas, wherein the device for recovering the heat and the evaporator device form a unit which is configured as a trickling film or thin film evaporator, which has a water inlet for the feed water, an air inlet for the fresh air, an exhaust gas inlet for the hot exhaust gas, an exhaust gas outlet for the cold exhaust gas, a steam/air mixture outlet for the hot steam/air mixture and an evaporator wall arrangement, along which the feed water runs down and is subjected to the fresh air, on one side, and which is subjected to the exhaust gas, on the other side.
Claim 8
Dependent Claim
162 words
A gas turbine installation, comprising a gas turbine with steam/air injection, a device for recovering the heat from the exhaust gas of the gas turbine, an evaporator device for generating a steam/air mixture, a compressor for generating compressed fresh air, the evaporator device being supplied with feed water, compressed fresh air from the compressor and heat from the exhaust gas, wherein the device for recovering the heat and the evaporator device form a unit which is configured as a trickling film or thin film evaporator, which has a water inlet for the feed water, an air inlet for the fresh air, an exhaust gas inlet for the hot exhaust gas, an exhaust gas outlet for the cold exhaust gas, a steam/air mixture outlet for the hot steam/air mixture and an evaporator wall arrangement, along which the feed water runs down and is subjected to the fresh air, on one side, and which is subjected to the exhaust gas, on the other side.
Claim 9
Dependent Claim
80 words
The gas turbine installation as claimed in claim 6 , wherein the trickling film or thin film evaporator has a casing in which is accommodated an evaporator line arrangement, which has or forms the wall arrangement in an evaporator section, the evaporation line arrangement being subjected from the outside by the exhaust gas within the casing, the feed water running down the wall arrangement and being subjected to the fresh air in the evaporator section within the evaporation line arrangement.
Claim 10
Dependent Claim
50 words
The gas turbine installation as claimed in claim 6 , wherein the air inlet and steam outlet and the exhaust gas inlet and exhaust gas outlet are arranged in such a way that flow can take place through the trickling film or thin film evaporator according to the counterflow principle.
Claim 11
Dependent Claim
45 words
The gas turbine installation as claimed in claim 6 , wherein a first heat exchanger is provided through which feed water can flow upstream of the wall arrangement, on one side, and fresh air can flow upstream of the wall arrangement, on the other side.
Claim 12
Dependent Claim
53 words
A gas turbine arrangement as claimed in claim 6 , wherein a second heat exchanger is provided through which feed water can flow upstream of the wall arrangement, in particular upstream of the first heat exchanger, on one side, and exhaust gas can flow upstream of the wall arrangement, on the other side.
Claim 13
Dependent Claim
30 words
The gas turbine arrangement as claimed in claim 10 , wherein the second heat exchanger is integrated into the trickling film or thin film evaporator, in particular into the casing.
Claim 14
Dependent Claim
45 words
The gas turbine installation as claimed in claim 6 , wherein a third heat exchanger is provided through which steam/air mixture can flow downstream of the wall arrangement, on one side, and exhaust gas can flow upstream of the wall arrangement, on the other side.
Claim 15
Dependent Claim
30 words
The gas turbine installation as claimed in claim 12 , wherein the third heat exchanger is integrated into the trickling film or thin film evaporator, in particular into the casing.
Claim 16
Dependent Claim
104 words
A use of a trickling film or thin film evaporator, in which a liquid medium runs down a heated wall arrangement and is subjected to a gaseous medium, the liquid medium being evaporated, mixed and led away with the gaseous medium for the recovery of heat from an exhaust gas of a gas turbine with steam injection, the exhaust gas being used for heating the wall arrangement, the liquid medium being formed by feed water, the gaseous medium being formed by fresh air compressed in a compressor and the evaporated feed water, mixed with the fresh air, forming the steam/air mixture for the injection.
Claim 17
Dependent Claim
104 words
A use of a trickling film or thin film evaporator, in which a liquid medium runs down a heated wall arrangement and is subjected to a gaseous medium, the liquid medium being evaporated, mixed and led away with the gaseous medium for the recovery of heat from an exhaust gas of a gas turbine with steam injection, the exhaust gas being used for heating the wall arrangement, the liquid medium being formed by feed water, the gaseous medium being formed by fresh air compressed in a compressor and the evaporated feed water, mixed with the fresh air, forming the steam/air mixture for the injection.
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) | 2007-03-23 | 2007-09-22 | 2008-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-03-23 | 2011-09-22 | 2012-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-03-23 | 2015-09-22 | 2016-03-23 | $7700.00 | Window Closed / Lapsed |