JPH07231610A - Gas cooling method for largepower generator and mixed gas for cooling - Google Patents
Gas cooling method for largepower generator and mixed gas for coolingInfo
- Publication number
- JPH07231610A JPH07231610A JP2074394A JP2074394A JPH07231610A JP H07231610 A JPH07231610 A JP H07231610A JP 2074394 A JP2074394 A JP 2074394A JP 2074394 A JP2074394 A JP 2074394A JP H07231610 A JPH07231610 A JP H07231610A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- cooling
- generator
- mixed
- helium
- 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.)
- Pending
Links
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、発電所などに設置され
ている大容量発電機の冷却方法及びその冷却に使用する
混合ガスに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling method for a large-capacity generator installed in a power plant or the like and a mixed gas used for cooling the same.
【０００２】[0002]
【従来技術】従来、発電所に設置されている大容量ター
ビン発電機では、冷却効果や全負荷効率等の面から、水
素ガスを用いて冷却している。2. Description of the Related Art Conventionally, in a large-capacity turbine generator installed in a power plant, hydrogen gas is used for cooling in terms of cooling effect and full load efficiency.
【０００３】[0003]
【発明が解決しようとする課題】ところが、水素ガスの
燃焼範囲は４.１〜９５％と範囲が広く、そのため、シ
ールを高精度にしなければならないうえ、ケーシングそ
の他の外郭部材も耐爆強度を持たせた構造にしなければ
ならないという問題が合った。本発明はこのような点に
着目してなされたもので、冷却性や全負荷効率が水素冷
却と同等でありながら、安全性に優れた冷却方法及びそ
の冷却方法に使用する混合ガスを提供することを目的と
する。However, since the combustion range of hydrogen gas is as wide as 4.1 to 95%, the seal must be highly accurate and the casing and other outer members also have an explosion-proof strength. The problem of having to have a structure was met. The present invention has been made paying attention to such points, and provides a cooling method excellent in safety while having a cooling property and a full load efficiency equivalent to that of hydrogen cooling, and a mixed gas used in the cooling method. The purpose is to
【０００４】[0004]
【課題を解決するための手段】上述の目的を達成するた
めに本発明では、大容量発電機の冷却に使用する冷却媒
体を水素ガスとヘリウムガスの混合ガスにしたことを特
徴とし、特に、ヘリウムガスの混合率を５〜７０ Vol％
にしたことを特徴としている。In order to achieve the above object, the present invention is characterized in that the cooling medium used for cooling the large capacity generator is a mixed gas of hydrogen gas and helium gas, and particularly, Helium gas mixing rate is 5 to 70 Vol%
It is characterized by having done.
【０００５】[0005]
【作用】本発明では、大容量発電機の冷却に水素ガスと
ヘリウムガスの混合ガスを使用するようにしているの
で、水素ガスの特性を生かしつつ、燃焼範囲を縮小して
安全性を高めることになる。In the present invention, since the mixed gas of hydrogen gas and helium gas is used for cooling the large-capacity generator, the combustion range can be reduced and the safety can be improved while utilizing the characteristics of hydrogen gas. become.
【０００６】[0006]
【実施例】図１は火力発電所等に設置されている大容量
タービン発電機の冷却系を示す概略図であり、タービン
発電機(１)に冷却用ガスの供給路(２)と排出路(３)とを
接続し、この冷却用ガス供給路(２)と冷却用ガス排出路
(３)とを熱交換器(４)を介して接続することにより、閉
ループの冷却ガス通路(５)が形成してある。EXAMPLE FIG. 1 is a schematic view showing a cooling system of a large-capacity turbine generator installed in a thermal power plant, etc., in which a cooling gas supply passage (2) and an exhaust passage are provided to a turbine generator (1). (3) is connected to this cooling gas supply path (2) and cooling gas discharge path
By connecting (3) and (3) via the heat exchanger (4), a closed loop cooling gas passage (5) is formed.
【０００７】そして、この冷却ガス通路(５)内に冷却用
ガスを充填し、この冷却用ガスを発電機(１)内と熱交換
器(４)との間で循環させて発電機(１)の内部を冷却する
ようになっている。Then, the cooling gas passage (5) is filled with a cooling gas, and the cooling gas is circulated between the inside of the generator (1) and the heat exchanger (4) so that the generator (1 ) Is designed to cool the inside.
【０００８】冷却用ガスとして、水素ガスとヘリウムガ
スとの混合ガスを使用している。図２は、２５℃大気圧
での水素−ヘリウム−空気混合物の爆発限界を示すグラ
フで、このグラフによると水素ガスにヘリウムガスを混
合すると爆発範囲が狭くなる。そして、ヘリウムガスを
５ Vol％程度混合すると、その爆発限範囲は１割程度狭
くなり、ヘリウムガスを７０ Vol％程度混合すると、そ
の爆発範囲は８割程度狭くなる。A mixed gas of hydrogen gas and helium gas is used as a cooling gas. FIG. 2 is a graph showing the explosion limit of a hydrogen-helium-air mixture at 25 ° C. atmospheric pressure. According to this graph, when helium gas is mixed with hydrogen gas, the explosion range becomes narrow. When helium gas is mixed at about 5 Vol%, the explosion limit range is narrowed by about 10%, and when helium gas is mixed at about 70 Vol%, the explosion range is narrowed by about 80%.
【０００９】一方、水素ガスにヘリウムガスを混合する
と、全体としての熱伝導率が低下する。図３はヘリウム
ガスの混合率を変化させた場合の熱伝導率の変化を示す
グラフで、このグラフによれば、ヘリウムガスを７０ V
ol％混合させた場合には約１１％程度熱伝導率が低下す
ることになる。また、図４はヘリウムガスの混合率を変
化させた場合のガス粘度の変化を示すグラフで、このグ
ラフによれば、ヘリウムガスを７０ Vol％混合させた場
合には１.８倍程度粘度が高くなることになる。そし
て、熱伝導率やガス粘度は冷却用ガスの冷却性能に大き
く影響するものであるから、熱伝導率は高く、粘度は低
いほうが冷却性に優れたガスであるとされいてる。On the other hand, when helium gas is mixed with hydrogen gas, the thermal conductivity as a whole is lowered. FIG. 3 is a graph showing the change in thermal conductivity when the mixing ratio of helium gas is changed. According to this graph, helium gas is 70 V
When ol% is mixed, the thermal conductivity is reduced by about 11%. FIG. 4 is a graph showing changes in gas viscosity when the mixing ratio of helium gas is changed. According to this graph, when helium gas is mixed at 70 Vol%, the viscosity is about 1.8 times. It will be high. Since the thermal conductivity and the gas viscosity have a great influence on the cooling performance of the cooling gas, the higher the thermal conductivity and the lower the viscosity, the better the cooling property.
【００１０】したがって、ヘリウムガスの混合率は高い
ほど安全性は高まるが冷却性に劣り、ヘリウムガスの混
合率が低いほど冷却性は優れるが安全性が低下するか
ら、ヘリウムガスの混合率を５〜７０％程度に設定する
と、爆発範囲の下限濃度は変わらないが爆発範囲の上限
濃度は１０〜８０％減少し、冷却性能をあまり低下させ
るがなくなる。Therefore, the higher the mixing ratio of helium gas, the higher the safety but inferior cooling performance, and the lower the mixing ratio of helium gas, the better the cooling performance but the lower safety. Therefore, the mixing ratio of helium gas is 5%. When it is set to about 70%, the lower limit concentration of the explosion range does not change, but the upper limit concentration of the explosion range decreases by 10 to 80%, and the cooling performance is not lowered so much.
【００１１】[0011]
【発明の効果】本発明では、大容量発電機の冷却に水素
ガスとヘリウムガスの混合ガスを使用するようにしてい
るので、水素ガスの特性を生かして良好な冷却性能を維
持しつつ、燃焼範囲を縮小して安全性を高めることがで
きる。According to the present invention, since the mixed gas of hydrogen gas and helium gas is used for cooling the large capacity generator, combustion is performed while maintaining good cooling performance by utilizing the characteristics of hydrogen gas. The range can be reduced to increase safety.
【図１】大容量タービン発電機の冷却系を示す概略図で
ある。FIG. 1 is a schematic diagram showing a cooling system of a large capacity turbine generator.
【図２】水素ガス−ヘリウムガス−空気混合物の爆発限
界を示すグラフである。FIG. 2 is a graph showing the explosion limit of a hydrogen gas-helium gas-air mixture.
【図３】水素ガスとヘリウムガスとの混合物の混合率に
よる熱伝導率の変化を示すグラフである。FIG. 3 is a graph showing changes in thermal conductivity depending on the mixing ratio of a mixture of hydrogen gas and helium gas.
【図４】水素ガスとヘリウムガスとの混合物の混合率に
よるガスの粘度変化を示すグラフである。FIG. 4 is a graph showing changes in gas viscosity depending on the mixing ratio of a mixture of hydrogen gas and helium gas.
１…タービン発電機、２…冷却用ガスの供給路、３…冷
却用ガスの排出路、４…熱交換器、５…冷却ガス通路。DESCRIPTION OF SYMBOLS 1 ... Turbine generator, 2 ... Cooling gas supply path, 3 ... Cooling gas discharge path, 4 ... Heat exchanger, 5 ... Cooling gas path.
Claims (2)
として、水素ガスとヘリウムガスの混合ガスを使用する
大容量発電機のガス冷却方法。1. A gas cooling method for a large-capacity generator using a mixed gas of hydrogen gas and helium gas as a cooling medium used for cooling the large-capacity generator.
リウムガスの混合率を５〜７０ Vol％にした大容量発電
機の冷却用混合ガス。2. A mixed gas for cooling a large-capacity generator, which comprises hydrogen gas and helium gas and has a helium gas mixing ratio of 5 to 70 Vol%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2074394A JPH07231610A (en) | 1994-02-18 | 1994-02-18 | Gas cooling method for largepower generator and mixed gas for cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2074394A JPH07231610A (en) | 1994-02-18 | 1994-02-18 | Gas cooling method for largepower generator and mixed gas for cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07231610A true JPH07231610A (en) | 1995-08-29 |
Family
ID=12035680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2074394A Pending JPH07231610A (en) | 1994-02-18 | 1994-02-18 | Gas cooling method for largepower generator and mixed gas for cooling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07231610A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7550113B2 (en) | 2004-09-16 | 2009-06-23 | Proton Energy Systems, Inc. | System for maintaining hydrogen purity in electrical generators and method thereof |
| US7552622B2 (en) | 2004-09-16 | 2009-06-30 | Proton Energy Systems | System for monitoring the health of electrical generators and method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4858307A (en) * | 1971-11-05 | 1973-08-16 |
-
1994
- 1994-02-18 JP JP2074394A patent/JPH07231610A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4858307A (en) * | 1971-11-05 | 1973-08-16 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7550113B2 (en) | 2004-09-16 | 2009-06-23 | Proton Energy Systems, Inc. | System for maintaining hydrogen purity in electrical generators and method thereof |
| US7552622B2 (en) | 2004-09-16 | 2009-06-30 | Proton Energy Systems | System for monitoring the health of electrical generators and method thereof |
| US7879613B2 (en) | 2004-09-16 | 2011-02-01 | Proton Energy Systems, Inc. | System for maintaining hydrogen purity in electrical generators and method thereof |
| US7888124B2 (en) | 2004-09-16 | 2011-02-15 | Proton Energy Systems | System for monitoring the health of electrical generators and method thereof |
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