JP2002285805A - Rankine cycle - Google Patents

Rankine cycle

Info

Publication number
JP2002285805A
JP2002285805A JP2001091027A JP2001091027A JP2002285805A JP 2002285805 A JP2002285805 A JP 2002285805A JP 2001091027 A JP2001091027 A JP 2001091027A JP 2001091027 A JP2001091027 A JP 2001091027A JP 2002285805 A JP2002285805 A JP 2002285805A
Authority
JP
Japan
Prior art keywords
condenser
steam
boiler
working fluid
liquid pump
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
Application number
JP2001091027A
Other languages
Japanese (ja)
Inventor
Noriyuki Nabeshima
範之 鍋島
Hiroyuki Hashimoto
裕之 橋本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2001091027A priority Critical patent/JP2002285805A/en
Publication of JP2002285805A publication Critical patent/JP2002285805A/en
Pending legal-status Critical Current

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  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the lowering of energy efficiency by supplying power to a motor for a cooling fan. SOLUTION: A Rankine cycle 10 is composed of an expansion machine 12 to which steam is fed from a boiler 11 and which is rotated by the expansion work of the steam; a condenser 15 to condense the steam worked at the expansion machine 12; and a liquid pump 13 to supply a condensed working fluid to the boiler 11. In this case, the condenser 15 is provided with a cooling fan 14 to high-efficiently condense the working fluid and the liquid pump 13 to circulate the working fluid, and the cooling fan and the liquid pump are coupled to a rotary shaft 16 to obtain the power directly from the rotary shaft 16.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、装置の小型化及び
効率化を実現したランキンサイクルに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Rankine cycle in which the size and efficiency of a device are reduced.

【0002】[0002]

【従来の技術】従来のランキンサイクル(Rankin
−Cycle)を図2に示す。当該ランキンサイクル1
10には作動流体が循環し、当該作動流体を蒸発させる
ボイラ111、該ボイラ111から蒸気が供給されて、
その蒸気の膨張仕事により回転する膨張機112、該膨
張機112で仕事した蒸気を凝縮させる凝縮器115、
復水した作動流体をボイラ111に供給する液体ポンプ
113等により構成されている。なお、図2に示す膨張
機112には発電機117が連結された構成を示してお
り、膨張機112が回転することにより発電機117が
駆動されて発電されるようになっている。
2. Description of the Related Art A conventional Rankine cycle (Rankin cycle)
-Cycle) is shown in FIG. Rankine cycle 1
A working fluid circulates through 10, a boiler 111 for evaporating the working fluid, and steam is supplied from the boiler 111,
An expander 112 that rotates by the expansion work of the steam, a condenser 115 that condenses the steam worked by the expander 112,
It is composed of a liquid pump 113 for supplying the condensed working fluid to the boiler 111 and the like. 2 shows a configuration in which a generator 117 is connected to the expander 112, and the generator 117 is driven by rotation of the expander 112 to generate power.

【0003】また、凝縮器115には作動流体を効率よ
く冷却するためにモータ118により回転する冷却ファ
ン114が設けられると共に、液体ポンプ113にはそ
の動力源としてモータ119が設けられている。
The condenser 115 is provided with a cooling fan 114 rotated by a motor 118 for efficiently cooling the working fluid, and the liquid pump 113 is provided with a motor 119 as a power source thereof.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、凝縮器
115に用いられている冷却ファン114のモータ11
8や液体ポンプ113の駆動源としてのモータ119に
は、別途外部から電力供給しなければならないために、
エネルギー効率が低くなる問題があった。
However, the motor 11 of the cooling fan 114 used in the condenser 115
8 and the motor 119 as a drive source of the liquid pump 113, since power must be separately supplied from the outside,
There was a problem that energy efficiency was reduced.

【0005】即ち、これらのモータ118,119に供
給される電力は、発電所や上記発電機117で発電され
た電力である。発電に費やされたエネルギーは100%
電力に変換されるわけではなく、供給エネルギーの一部
しか電力に変換されない。
That is, the electric power supplied to these motors 118 and 119 is electric power generated by the power plant or the generator 117. 100% of the energy spent on power generation
It is not converted to electric power, but only part of the supplied energy is converted to electric power.

【0006】また、この電力によりモータ118,11
9を駆動する際には、その一部が発熱ロス等になるため
全てを動力として取出すことができない。従って、その
分エネルギー効率を高めることができない問題がある。
Further, the electric power is used by the motors 118 and 11.
When driving the motor 9, all of the motor 9 cannot be taken out as motive power because a part thereof generates heat loss or the like. Therefore, there is a problem that the energy efficiency cannot be increased accordingly.

【0007】そこで、本発明は、モータに電力供給する
ことによるエネルギー効率の低下を防止することができ
るようにしたランキンサイクルを提供することを目的と
する。
Accordingly, an object of the present invention is to provide a Rankine cycle capable of preventing a reduction in energy efficiency due to power supply to a motor.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するた
め、請求項1にかかる発明は、作動流体を加熱して蒸気
にするボイラと、該ボイラから蒸気が供給されて、その
蒸気の膨張仕事により回転軸が回転する膨張機と、該膨
張機で仕事した蒸気を冷却材と熱交換させて凝縮させる
凝縮器と、該冷却材を凝縮器に供給する冷却材供給機
と、凝縮した作動流体をボイラに供給する液体ポンプと
を有するランキンサイクルにおいて、冷却材供給機及び
液体ポンプの動力源として、回転軸の動力を用いるよう
にしてモータ等に電力供給することによるエネルギー効
率の低下を防止するようにしたことを特徴とする。
According to a first aspect of the present invention, there is provided a boiler for heating a working fluid to produce steam, and steam supplied from the boiler to expand the steam. An expander whose rotating shaft rotates, a condenser for exchanging heat produced by the expander with heat by exchanging heat with a coolant, a coolant supply device for supplying the coolant to the condenser, and a condensed working fluid Cycle that has a liquid pump that supplies water to a boiler, prevents a decrease in energy efficiency due to supplying power to a motor or the like by using power of a rotating shaft as a power source of a coolant supply device and a liquid pump. It is characterized by doing so.

【0009】請求項2にかかる発明は、冷却材供給機
が、凝縮器に外気を送風する冷却ファン、または当該凝
縮器に冷却水を圧送する冷却ポンプであって、その動力
を回転軸から受けるようにしたことを特徴とする。
According to a second aspect of the present invention, the coolant supply device is a cooling fan that blows outside air to the condenser or a cooling pump that pressure-feeds the cooling water to the condenser, and receives the power from the rotating shaft. It is characterized by doing so.

【0010】[0010]

【発明の実施の形態】本発明の実施の形態を図を参照し
て説明する。図1は本発明に係るランキンサイクル10
の構成を示す図である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a Rankine cycle 10 according to the present invention.
FIG.

【0011】当該ランキンサイクル10は作動流体の蒸
発を生成するボイラ11、該ボイラ11から蒸気が供給
されて、その蒸気の膨張仕事により回転する膨張機1
2、該膨張機12で仕事した蒸気を凝縮させて復水させ
る凝縮器15、復水した作動流体をボイラ11に供給す
る液体ポンプ13等により構成されている。なお、図1
に示す膨張機12の回転軸16には発電機17が連結さ
れ、回転軸16が回転することにより発電機17が駆動
されて発電を行うようになっている。
The Rankine cycle 10 is a boiler 11 for generating a working fluid, and steam is supplied from the boiler 11, and the expander 1 is rotated by expansion work of the steam.
2, a condenser 15 for condensing steam condensed by the expander 12 and condensing it, a liquid pump 13 for supplying condensed working fluid to the boiler 11, and the like. FIG.
The generator 17 is connected to the rotating shaft 16 of the expander 12 shown in FIG. 1, and the rotating shaft 16 rotates to drive the generator 17 to generate power.

【0012】また、凝縮器15には作動流体を効率よく
冷却するために冷却ファン14が設けられ、この冷却フ
ァン14は回転軸16に取付けられている。さらに、液
体ポンプ13も、この回転軸16から直接動力を得るよ
うに設けられている。
The condenser 15 is provided with a cooling fan 14 for efficiently cooling the working fluid, and the cooling fan 14 is attached to a rotating shaft 16. Further, the liquid pump 13 is also provided so as to obtain power directly from the rotating shaft 16.

【0013】このような構成でボイラ11で蒸気となっ
た作動流体は、蒸気タービン等の膨張機12に供給され
て、ここで膨張することにより当該膨張機12を駆動す
る。これにより回転軸16が回動して、それに連結され
ている発電機17を駆動すると共に、液体ポンプ13を
駆動し、また冷却ファン14を駆動する。
[0013] The working fluid that has become steam in the boiler 11 in such a configuration is supplied to an expander 12 such as a steam turbine, and expands the drive fluid to drive the expander 12. Accordingly, the rotating shaft 16 rotates to drive the generator 17 connected to the rotating shaft 16, drive the liquid pump 13, and drive the cooling fan 14.

【0014】そして、膨張機12からの作動流体は凝縮
器15に供給され、ここで外気等と熱交換して凝縮す
る。このとき、冷却ファン14が回転軸16の回転によ
り動作するので、それによる風が凝縮器15に送風され
て外気等と作動流体との熱交換効率が高められるように
なっている。
The working fluid from the expander 12 is supplied to the condenser 15, where it exchanges heat with the outside air and condenses. At this time, since the cooling fan 14 operates by the rotation of the rotating shaft 16, the resulting wind is blown to the condenser 15, so that the efficiency of heat exchange between the outside air and the like and the working fluid is improved.

【0015】このようにして凝縮した作動流体は、回転
軸16の回転により動作する液体ポンプ13により圧送
され、ボイラ11に供給される。
The working fluid condensed in this way is pressure-fed by a liquid pump 13 operated by the rotation of a rotating shaft 16 and supplied to a boiler 11.

【0016】以上のように、凝縮器15に外気等を送風
する冷却ファン14及び液体ポンプ13をモータにより
駆動するのではなく、回転軸16の動力で駆動するよう
にしたので、従来に比べエネルギー効率を向上させるこ
とができるようになる。
As described above, the cooling fan 14 and the liquid pump 13 for blowing the outside air and the like to the condenser 15 are not driven by the motor but by the power of the rotating shaft 16, so that the energy is lower than in the conventional case. Efficiency can be improved.

【0017】また、モータが不用になるので、その分装
置が簡略化できると共に、小型化ができるようになる。
Further, since a motor is not required, the apparatus can be simplified and the size can be reduced.

【0018】なお、上記説明においては、冷却ファン1
4や液体ポンプ13の動力を回転軸16から得る場合に
ついて説明した。しかし、このようなランキンサイクル
10を発電等に用いる際には、冷却ファン14や液体ポ
ンプ13以外にもモータ駆動による機器が多々使用され
る場合がある。
In the above description, the cooling fan 1
4 and the case where the power of the liquid pump 13 is obtained from the rotating shaft 16 has been described. However, when such a Rankine cycle 10 is used for power generation or the like, a motor-driven device other than the cooling fan 14 and the liquid pump 13 may be used in many cases.

【0019】例えば、火力発電プラントのランキンサイ
クルにおいては、ボイラでLNG等の化石燃料を燃焼さ
せるためにLNG気化器(熱交換器)が設けられて、そ
の冷却材として海水が用いられたり、凝縮器において作
動流体を冷却するために海水が用いられたりしている。
For example, in a Rankine cycle of a thermal power plant, an LNG vaporizer (heat exchanger) is provided for burning a fossil fuel such as LNG by a boiler, and seawater is used as a coolant for the LNG vaporizer or condensate. For example, seawater is used to cool a working fluid in a vessel.

【0020】このように海水を用いる場合には、海水汲
上用ポンプが必要になり、その動力源としてモータが用
いられているが、当該ポンプの動力源を回転軸から得る
ようにしてもよい。
When seawater is used, a pump for pumping seawater is required, and a motor is used as a power source for the pump. However, a power source for the pump may be obtained from a rotating shaft.

【0021】[0021]

【発明の効果】以上説明したように請求項1にかかる発
明によれば、冷却材供給機及び液体ポンプの動力源とし
て、回転軸の動力を用いるようにしたので、これらをモ
ータ駆動する際に供給される電力が不要になりエネルギ
ー効率の低下が防止できるようになる。
As described above, according to the first aspect of the present invention, the power of the rotary shaft is used as the power source of the coolant supply device and the liquid pump. The electric power to be supplied becomes unnecessary, and a decrease in energy efficiency can be prevented.

【0022】請求項2にかかる発明によれば、冷却材供
給機が、凝縮器に外気を送風する冷却ファン、または当
該凝縮器に冷却水を圧送する冷却ポンプであって、その
動力を回転軸から受けるようにしたので、これらをモー
タ駆動する際に供給される電力が不要になりエネルギー
効率の低下が防止できるようになる。
According to the second aspect of the present invention, the coolant supply device is a cooling fan that blows outside air to the condenser or a cooling pump that pressure-feeds cooling water to the condenser. , The electric power supplied when these are driven by the motor becomes unnecessary, and a decrease in energy efficiency can be prevented.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の形態の説明に適用されるランキ
ンサイクルの構成図である。
FIG. 1 is a configuration diagram of a Rankine cycle applied to an embodiment of the present invention.

【図2】従来の技術の説明に適用されるランキンサイク
ルの構成図である。
FIG. 2 is a configuration diagram of a Rankine cycle applied to a description of a conventional technique.

【符号の説明】[Explanation of symbols]

10 ランキンサイクル 11 ボイラ 12 膨張機 13 液体ポンプ 14 冷却ファン 15 凝縮器 16 回転軸 17 発電機 Reference Signs List 10 Rankine cycle 11 Boiler 12 Expander 13 Liquid pump 14 Cooling fan 15 Condenser 16 Rotary shaft 17 Generator

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 作動流体を加熱して蒸気にするボイラ
と、該ボイラから蒸気が供給されて、その蒸気の膨張仕
事により回転軸が回転する膨張機と、該膨張機で仕事し
た蒸気を冷却材と熱交換させて凝縮させる凝縮器と、該
冷却材を凝縮器に供給する冷却材供給機と、凝縮した作
動流体をボイラに供給する液体ポンプとを有するランキ
ンサイクルにおいて、 前記冷却材供給機及び液体ポンプの動力源として、前記
回転軸の動力を用いるようにしたことを特徴とするラン
キンサイクル。
1. A boiler that heats a working fluid to produce steam, a steam is supplied from the boiler, and an expander whose rotating shaft rotates by the expansion work of the steam; and the steam that has been worked by the expander is cooled. In a Rankine cycle having a condenser for exchanging heat with a material for condensation, a coolant supply device for supplying the coolant to the condenser, and a liquid pump for supplying a condensed working fluid to the boiler, the coolant supply device And a power source for the liquid pump, wherein the power of the rotary shaft is used.
【請求項2】 前記冷却材供給機が、前記凝縮器に外気
を送風する冷却ファン、または当該凝縮器に冷却水を圧
送する冷却ポンプであって、その動力を前記回転軸から
受けるようにしたことを特徴とする請求項1記載のラン
キンサイクル。
2. The cooling material supply device is a cooling fan that blows outside air to the condenser or a cooling pump that pressure-feeds cooling water to the condenser, and receives the power from the rotating shaft. The Rankine cycle according to claim 1, wherein:
JP2001091027A 2001-03-27 2001-03-27 Rankine cycle Pending JP2002285805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001091027A JP2002285805A (en) 2001-03-27 2001-03-27 Rankine cycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001091027A JP2002285805A (en) 2001-03-27 2001-03-27 Rankine cycle

Publications (1)

Publication Number Publication Date
JP2002285805A true JP2002285805A (en) 2002-10-03

Family

ID=18945725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001091027A Pending JP2002285805A (en) 2001-03-27 2001-03-27 Rankine cycle

Country Status (1)

Country Link
JP (1) JP2002285805A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6880344B2 (en) 2002-11-13 2005-04-19 Utc Power, Llc Combined rankine and vapor compression cycles
US6892522B2 (en) 2002-11-13 2005-05-17 Carrier Corporation Combined rankine and vapor compression cycles
US6962056B2 (en) 2002-11-13 2005-11-08 Carrier Corporation Combined rankine and vapor compression cycles
US6989989B2 (en) 2003-06-17 2006-01-24 Utc Power Llc Power converter cooling
US7013644B2 (en) 2003-11-18 2006-03-21 Utc Power, Llc Organic rankine cycle system with shared heat exchanger for use with a reciprocating engine
US7017357B2 (en) 2003-11-18 2006-03-28 Carrier Corporation Emergency power generation system
US7036315B2 (en) 2003-12-19 2006-05-02 United Technologies Corporation Apparatus and method for detecting low charge of working fluid in a waste heat recovery system
US7100380B2 (en) 2004-02-03 2006-09-05 United Technologies Corporation Organic rankine cycle fluid
US7665304B2 (en) 2004-11-30 2010-02-23 Carrier Corporation Rankine cycle device having multiple turbo-generators
US7735324B2 (en) 2002-11-13 2010-06-15 Carrier Corporation Power generation with a centrifugal compressor
JP2013057265A (en) * 2011-09-07 2013-03-28 Kobe Steel Ltd Power generation equipment

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6880344B2 (en) 2002-11-13 2005-04-19 Utc Power, Llc Combined rankine and vapor compression cycles
US6892522B2 (en) 2002-11-13 2005-05-17 Carrier Corporation Combined rankine and vapor compression cycles
US6962056B2 (en) 2002-11-13 2005-11-08 Carrier Corporation Combined rankine and vapor compression cycles
US7735324B2 (en) 2002-11-13 2010-06-15 Carrier Corporation Power generation with a centrifugal compressor
US6989989B2 (en) 2003-06-17 2006-01-24 Utc Power Llc Power converter cooling
US7289325B2 (en) 2003-06-17 2007-10-30 Utc Power Corporation Power converter cooling
US7013644B2 (en) 2003-11-18 2006-03-21 Utc Power, Llc Organic rankine cycle system with shared heat exchanger for use with a reciprocating engine
US7017357B2 (en) 2003-11-18 2006-03-28 Carrier Corporation Emergency power generation system
US7036315B2 (en) 2003-12-19 2006-05-02 United Technologies Corporation Apparatus and method for detecting low charge of working fluid in a waste heat recovery system
US7100380B2 (en) 2004-02-03 2006-09-05 United Technologies Corporation Organic rankine cycle fluid
US7665304B2 (en) 2004-11-30 2010-02-23 Carrier Corporation Rankine cycle device having multiple turbo-generators
JP2013057265A (en) * 2011-09-07 2013-03-28 Kobe Steel Ltd Power generation equipment

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