JPH05141267A - Steam cooling method for gas turbine - Google Patents
Steam cooling method for gas turbineInfo
- Publication number
- JPH05141267A JPH05141267A JP32707991A JP32707991A JPH05141267A JP H05141267 A JPH05141267 A JP H05141267A JP 32707991 A JP32707991 A JP 32707991A JP 32707991 A JP32707991 A JP 32707991A JP H05141267 A JPH05141267 A JP H05141267A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- turbine
- cooling
- gas turbine
- combustor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガスタービン・蒸気タ
ービンコンバインドプラントに適用されるガスタービン
の蒸気冷却方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas turbine steam cooling method applied to a gas turbine / steam turbine combined plant.
【０００２】[0002]
【従来の技術】図２は、従来の蒸気冷却方法を採用した
ガスタービン・蒸気タービンコンバインドプラントの系
統図である。図２において、圧縮機１で圧縮された空気
は、燃焼器２で燃料を燃焼させて高温ガスとなり、ガス
タービン３で膨脹した後、排ガスボイラ４に送られて蒸
気を発生させ、その後煙突５から大気中に排出される。
一方、排ガスボイラ４で発生した蒸気は蒸気タービン６
に送られて仕事をなし、その後復水器７に送られて復水
する。そして、ガスタービン３および蒸気タービン６は
それぞれ発電機８を駆動する。2. Description of the Related Art FIG. 2 is a system diagram of a gas turbine / steam turbine combined plant adopting a conventional steam cooling method. In FIG. 2, the air compressed by the compressor 1 burns fuel in the combustor 2 to become high-temperature gas, expands in the gas turbine 3, and then is sent to the exhaust gas boiler 4 to generate steam, and then the chimney 5 Emitted into the atmosphere.
On the other hand, the steam generated in the exhaust gas boiler 4 is the steam turbine 6
Sent to the factory to work, and then sent to the condenser 7 to condense water. Then, the gas turbine 3 and the steam turbine 6 respectively drive the generator 8.
【０００３】以上述べた構成において、燃焼器２および
ガスタービン３を冷却するのに、従来は一般に、圧縮機
１の吐出空気や抽気が使われ、冷却後は燃焼器２内又は
ガスタービン３のガスパス内に放出されている。このた
め、燃焼器２内では燃焼に与える空気量が減少してＮＯ
ｘを増大させ、ガスタービン３では冷却空気が作動ガス
に混入してガス温度を下げ、効率低下の原因となってい
る。In the above-described structure, conventionally, in order to cool the combustor 2 and the gas turbine 3, conventionally, discharge air or bleed air of the compressor 1 is used, and after cooling, the inside of the combustor 2 or the gas turbine 3 is cooled. It is released into the gas path. Therefore, in the combustor 2, the amount of air given to the combustion is reduced and NO
x is increased, cooling air is mixed with the working gas in the gas turbine 3 to lower the gas temperature, which causes a decrease in efficiency.
【０００４】そこで、図２に示す従来例では、蒸気ター
ビン６の中間段からの蒸気をライン９を通して燃焼器２
およびガスタービン３に導入し、燃焼器内筒およびター
ビン中空静翼の冷却に供するようにしている。このよう
な蒸気冷却の場合は、燃焼器２に流入する空気のすべて
が燃焼用空気に使われるため、低ＮＯｘ化を図ることが
でき、また冷却空気の圧縮動力が不要となるため、ガス
タービン効率が向上する。Therefore, in the conventional example shown in FIG. 2, the steam from the intermediate stage of the steam turbine 6 is passed through the line 9 to the combustor 2
And is introduced into the gas turbine 3 to be used for cooling the combustor inner cylinder and the turbine hollow stationary blade. In the case of such steam cooling, since all of the air flowing into the combustor 2 is used as combustion air, it is possible to achieve low NOx, and because compression power for cooling air is unnecessary, the gas turbine is used. Efficiency is improved.
【０００５】[0005]
【発明が解決しようとする課題】しかし、この図２に示
した従来例においては、燃焼器２およびガスタービン３
の冷却に使用された蒸気は燃焼器２内又はガスタービン
３のガスパス内に放出されているため、次のような問題
点が発生していた。However, in the conventional example shown in FIG. 2, the combustor 2 and the gas turbine 3 are provided.
Since the steam used for cooling is discharged into the combustor 2 or the gas path of the gas turbine 3, the following problems occur.
【０００６】すなわち、蒸気タービン６で真空まで膨脹
する蒸気が大気圧までしか膨脹せず、コンバインドプラ
ント熱効率を低下させていた。また、燃焼器２について
も、冷却蒸気をガスタービン３の所定入口温度まで加熱
するために余分の燃料を必要とし、プラント熱効率低下
の原因となっていた。更に、冷却蒸気が回収されないた
めに余分な補給水を必要とし、蒸留水補給のための水処
理設備および運転費を増大させていた。That is, the steam that expands to a vacuum in the steam turbine 6 expands only up to the atmospheric pressure, thus lowering the thermal efficiency of the combined plant. Further, also in the combustor 2, extra fuel is required to heat the cooling steam to a predetermined inlet temperature of the gas turbine 3, which causes a decrease in plant thermal efficiency. Further, since the cooling steam is not recovered, an extra make-up water is required, which increases the water treatment equipment and the operating cost for making up the distilled water.
【０００７】本発明は、このような従来技術の課題を解
決するためになされたもので、ガスタービン・蒸気ター
ビンコンバインドプラントにおいて、コンバインド熱効
率を向上でき、かつ余分な燃料および補給水を必要とし
ないガスタービンの蒸気冷却方法を提供することを目的
とする。The present invention has been made in order to solve the problems of the prior art, and in a gas turbine / steam turbine combined plant, combined thermal efficiency can be improved and no extra fuel and make-up water are required. An object of the present invention is to provide a steam cooling method for a gas turbine.
【０００８】[0008]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明に係るガスタービンの蒸気冷却方法は、ガ
スタービンと、このガスタービンからの排ガスが供給さ
れる排ガスボイラと、この排ガスボイラからの蒸気が供
給される蒸気タービンとを備えるコンバインドプラント
において、上記蒸気タービンの中間段からの蒸気をガス
タービンの燃焼器およびタービン中空静翼に導いて冷却
に供し、冷却後の蒸気を回収して、上記蒸気タービン抽
気段の後流側に導くようにしたものである。In order to solve the above-mentioned problems, a gas turbine steam cooling method according to the present invention includes a gas turbine, an exhaust gas boiler to which exhaust gas from the gas turbine is supplied, and an exhaust gas. In a combined plant including a steam turbine to which steam from a boiler is supplied, the steam from the intermediate stage of the steam turbine is introduced into a combustor of a gas turbine and a hollow turbine vane for cooling, and the steam after cooling is recovered. The steam turbine extraction stage is then guided to the downstream side.
【０００９】[0009]
【作用】上記の手段によれば、ガスタービン冷却後の蒸
気は蒸気タービンで真空まで膨脹して復水する。また、
冷却蒸気は所定の蒸気タービン入口温度まで加熱され
る。このため、余分の燃料を必要としない。したがっ
て、コンバインドプラント熱効率が向上し、余分な補給
水が不要となる。According to the above means, the steam after cooling the gas turbine is expanded to a vacuum in the steam turbine and condensed. Also,
The cooling steam is heated to a predetermined steam turbine inlet temperature. Therefore, no extra fuel is needed. Therefore, the thermal efficiency of the combined plant is improved and extra make-up water is unnecessary.
【００１０】[0010]
【実施例】以下、図１を参照して本発明の一実施例につ
いて詳細に説明する。図１は本実施例に係る蒸気冷却方
法を採用したガスタービン・蒸気タービンコンバインド
プラントの系統図であり、図２に示したものと同一の部
分には同一の符号を付して、重複する説明は省略する。An embodiment of the present invention will be described in detail below with reference to FIG. FIG. 1 is a system diagram of a gas turbine / steam turbine combined plant adopting the steam cooling method according to the present embodiment. The same parts as those shown in FIG. Is omitted.
【００１１】図１に示すように、本実施例によれば、蒸
気タービン６の中間段からの蒸気は抽気ライン９を通し
てガスタービン３の燃焼器２およびガスタービン３に導
かれ、それぞれ燃焼器内筒およびタービン中空静翼の冷
却に供される。そして、冷却後の蒸気は、回収ライン１
０を通して回収されて、ガスタービン３の外部に導か
れ、再び蒸気タービン６の抽気段後流側に流入して膨脹
する。As shown in FIG. 1, according to this embodiment, the steam from the intermediate stage of the steam turbine 6 is guided to the combustor 2 and the gas turbine 3 of the gas turbine 3 through the extraction line 9, and the steam inside the combustor is exhausted. It is used for cooling the cylinder and turbine hollow vane. Then, the steam after cooling is collected in the recovery line 1
It is recovered through 0, guided to the outside of the gas turbine 3, and again flows into the downstream side of the extraction stage of the steam turbine 6 to expand.
【００１２】なお、この種ガスタービンの燃焼器内筒に
は、フィルム冷却によらず、対流冷却によって内筒壁面
の冷却を図る二重壁構造のものが使われる。The combustor inner cylinder of this type of gas turbine has a double wall structure for cooling the inner cylinder wall surface by convection cooling instead of film cooling.
【００１３】[0013]
【発明の効果】以上述べたように、本発明によれば、ガ
スタービン・蒸気タービンコンバインドプラントにおい
て、蒸気タービンの中間段からの蒸気をガスタービンの
燃焼器およびタービン中空静翼の冷却に供し、冷却後の
蒸気をガスタービンの外部に導き、再び蒸気タービンで
膨脹させるようにしているので、冷却蒸気が燃焼ガスに
混入せず、また冷却後蒸気タービンへ回収されるため、
コンバインドプラント熱効率が向上するとともに、冷媒
蒸気は所定の蒸気タービン入口温度まで加熱されるため
余分の燃料を必要とせず、かつ冷却蒸気に対応していた
補給水も不要となり、設備費および運転費が大幅に減少
するなどの効果を奏する。As described above, according to the present invention, in the gas turbine / steam turbine combined plant, steam from the intermediate stage of the steam turbine is used for cooling the combustor of the gas turbine and the hollow turbine vane, Since the steam after cooling is guided to the outside of the gas turbine and expanded again by the steam turbine, the cooling steam does not mix with the combustion gas and is recovered by the steam turbine after cooling.
The combined plant thermal efficiency is improved, and since the refrigerant steam is heated to the prescribed steam turbine inlet temperature, no extra fuel is required, and make-up water corresponding to the cooling steam is no longer required, which reduces equipment and operating costs. It has the effect of being significantly reduced.
【図１】本発明の一実施例に係る蒸気冷却方法を採用し
たガスタービン・蒸気タービンコンバインドプラントの
系統図である。FIG. 1 is a system diagram of a gas turbine / steam turbine combined plant adopting a steam cooling method according to an embodiment of the present invention.
【図２】従来の蒸気冷却方法を採用したガスタービン・
蒸気タービンコンバインドプラントの系統図である。[Fig. 2] Gas turbine adopting the conventional steam cooling method
It is a system diagram of a steam turbine combined plant.
１ 圧縮機 ２ 燃焼器 ３ ガスタービン ４ 排ガスボイラ ５ 煙突 ６ 蒸気タービン ７ 復水器 ８ 発電機 ９ 抽気ライン １０ 回収ライン 1 Compressor 2 Combustor 3 Gas Turbine 4 Exhaust Gas Boiler 5 Chimney 6 Steam Turbine 7 Condenser 8 Generator 9 Extraction Line 10 Recovery Line
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０２Ｃ 6/18 Ａ 7910−3Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display area F02C 6/18 A 7910-3G
Claims (1)
排ガスが供給される排ガスボイラと、この排ガスボイラ
からの蒸気が供給される蒸気タービンとを備えるコンバ
インドプラントにおいて、上記蒸気タービンの中間段か
らの蒸気をガスタービンの燃焼器およびタービン中空静
翼に導いて冷却に供し、冷却後の蒸気を回収して、上記
蒸気タービン抽気段の後流側に導くことを特徴とするガ
スタービンの蒸気冷却方法。1. A combined plant comprising a gas turbine, an exhaust gas boiler to which exhaust gas from the gas turbine is supplied, and a steam turbine to which steam from the exhaust gas boiler is supplied. A steam cooling method for a gas turbine, characterized in that the steam is guided to a combustor of a gas turbine and a hollow turbine vane for cooling, and the steam after cooling is recovered and guided to a downstream side of the steam turbine extraction stage. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3327079A JP2984442B2 (en) | 1991-11-15 | 1991-11-15 | Gas turbine steam cooling method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3327079A JP2984442B2 (en) | 1991-11-15 | 1991-11-15 | Gas turbine steam cooling method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05141267A true JPH05141267A (en) | 1993-06-08 |
| JP2984442B2 JP2984442B2 (en) | 1999-11-29 |
Family
ID=18195056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3327079A Expired - Fee Related JP2984442B2 (en) | 1991-11-15 | 1991-11-15 | Gas turbine steam cooling method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2984442B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670418A1 (en) * | 1994-03-04 | 1995-09-06 | Westinghouse Electric Corporation | Method to use superheated cooling steam from a gas turbine in a thermochemical process |
| EP0674099A1 (en) * | 1994-03-21 | 1995-09-27 | ABB Management AG | Cooling method for the thermically charged components of a gasturbine powerplant |
| EP0764767A2 (en) * | 1995-09-22 | 1997-03-26 | Kabushiki Kaisha Toshiba | Combined cycle power plant |
| DE19716721A1 (en) * | 1997-04-21 | 1998-11-12 | Siemens Ag | Method of operating a gas turbine and gas turbine operating thereafter |
| WO1998059158A1 (en) * | 1997-06-24 | 1998-12-30 | Mitsubishi Heavy Industries, Ltd. | Steam cooling apparatus for gas turbine |
| EP0939201A1 (en) * | 1996-10-29 | 1999-09-01 | Mitsubishi Heavy Industries, Ltd. | Combined cycle power plant |
| CN102216569A (en) * | 2008-11-13 | 2011-10-12 | 西门子公司 | Inner housing for a turbomachine |
| JP2012533017A (en) * | 2009-07-10 | 2012-12-20 | エヌアールジー エネジー インコーポレイテッド | Combined cycle power unit |
-
1991
- 1991-11-15 JP JP3327079A patent/JP2984442B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0670418A1 (en) * | 1994-03-04 | 1995-09-06 | Westinghouse Electric Corporation | Method to use superheated cooling steam from a gas turbine in a thermochemical process |
| EP0674099A1 (en) * | 1994-03-21 | 1995-09-27 | ABB Management AG | Cooling method for the thermically charged components of a gasturbine powerplant |
| EP1184541A1 (en) * | 1995-09-22 | 2002-03-06 | Kabushiki Kaisha Toshiba | Combined cycle power plant |
| EP0764767A3 (en) * | 1995-09-22 | 1998-05-27 | Kabushiki Kaisha Toshiba | Combined cycle power plant |
| US6000213A (en) * | 1995-09-22 | 1999-12-14 | Kabushiki Kaisha Toshiba | Combined cycle power plant |
| EP0764767A2 (en) * | 1995-09-22 | 1997-03-26 | Kabushiki Kaisha Toshiba | Combined cycle power plant |
| EP0939201A1 (en) * | 1996-10-29 | 1999-09-01 | Mitsubishi Heavy Industries, Ltd. | Combined cycle power plant |
| DE19716721A1 (en) * | 1997-04-21 | 1998-11-12 | Siemens Ag | Method of operating a gas turbine and gas turbine operating thereafter |
| WO1998059158A1 (en) * | 1997-06-24 | 1998-12-30 | Mitsubishi Heavy Industries, Ltd. | Steam cooling apparatus for gas turbine |
| US6128895A (en) * | 1997-06-24 | 2000-10-10 | Mitsubishi Heavy Industries, Ltd. | Steam cooling apparatus for gas turbine |
| CN102216569A (en) * | 2008-11-13 | 2011-10-12 | 西门子公司 | Inner housing for a turbomachine |
| JP2012508844A (en) * | 2008-11-13 | 2012-04-12 | シーメンス アクティエンゲゼルシャフト | Inner housing for turbomachinery |
| JP2012533017A (en) * | 2009-07-10 | 2012-12-20 | エヌアールジー エネジー インコーポレイテッド | Combined cycle power unit |
| US8943836B2 (en) | 2009-07-10 | 2015-02-03 | Nrg Energy, Inc. | Combined cycle power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2984442B2 (en) | 1999-11-29 |
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Legal Events
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