JP2006009592A - Generating set and its operating method - Google Patents

Generating set and its operating method Download PDF

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JP2006009592A
JP2006009592A JP2004183791A JP2004183791A JP2006009592A JP 2006009592 A JP2006009592 A JP 2006009592A JP 2004183791 A JP2004183791 A JP 2004183791A JP 2004183791 A JP2004183791 A JP 2004183791A JP 2006009592 A JP2006009592 A JP 2006009592A
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generator
cooling
medium
working medium
condenser
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Tomoyuki Uchimura
知行 内村
Osayuki Inoue
修行 井上
Kiichi Irie
毅一 入江
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Ebara Corp
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Ebara Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a generating set and its operating method for cooling each part which requires cooling, such as a lubricating oil cooler, a generator, an inverter and a control panel with the latent heat of an operating medium, and effectively recovering heat of the operating medium heated by cooling. <P>SOLUTION: This generating set is provided with a power recovery device having a steam generator 10 recovering waste heat or the like to generate high pressure steam of the operating medium, the generator 12, a turbine (an expander) 13, a condenser 14 and a medium circulating pump 15. The generating set is further provided with a cooling medium pump 25 for feeding a condensate 101 of the operating medium condensed by the condenser 14, as the cooling medium to at least one of the respective parts (the lubricating oil cooler 23, the generator 12, the inverter 24, the control panel, and the like) which require cooling, and returning the operating medium 104 used for cooling, to the condenser 4, and a heat recovery apparatus 26 for exchanging heat between the operating medium 104 returned to the condenser 14, and the condensate 101 of the operating medium fed to the steam generator 10 by the medium circulating pump 15, to recover heat. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は排熱等を回収して、この熱エネルギーを電力に変換する発電装置及びその運転方法に関するものである。   The present invention relates to a power generation apparatus that recovers exhaust heat and converts this thermal energy into electric power, and an operation method thereof.

蒸気発生器、膨張機、凝縮器、発電機を具備し、排熱等を前記蒸発器で回収して作動媒体の高圧蒸気を生成し、該生成した高圧蒸気をタービン等の膨張機に導入し発電機を駆動するように構成された動力回収装置は、設置スペースやコストの面から小型化が要求されている。このうち、発電機、該発電機の出力を周波数変換するインバータ、制御を行う制御盤、発電機等の軸受を潤滑する潤滑油を冷却する潤滑油冷却器等の発熱機器を小型化する一つの方法として、水で冷却する水冷化が行なわれている。   A steam generator, an expander, a condenser, and a generator are provided. The exhaust heat is recovered by the evaporator to generate high-pressure steam as a working medium, and the generated high-pressure steam is introduced into an expander such as a turbine. A power recovery device configured to drive a generator is required to be downsized in terms of installation space and cost. Among them, one of the heat generators such as a generator, an inverter that converts the frequency of the output of the generator, a control panel that performs control, and a lubricating oil cooler that cools lubricating oil that lubricates bearings of the generator, etc. As a method, water cooling is performed by cooling with water.

上記水冷化による冷却方法には下記のような問題がある。
（１）水の顕熱で冷却すると、ある程度の流量が必要で、配管が太くなり、小型化にも限界がある。
（２）水は導電性があるので、絶縁不良等の原因となることがある。 The cooling method by water cooling has the following problems.
(1) When cooled with sensible heat of water, a certain amount of flow is required, piping becomes thick, and there is a limit to downsizing.
(2) Since water has conductivity, it may cause insulation failure.

上記水の顕熱による冷却に対して、作動媒体の潜熱を利用する冷却方法があり、潜熱で冷却することにより、必要な媒体量が少なくて済み、絶縁性のある媒体であれば、絶縁不良の原因とならない。しかしながら、従来の媒体の潜熱による冷却方法では、冷却に利用した媒体は凝縮器などで再度液化しており、この熱は単に損失となるという問題がある。   There is a cooling method that uses the latent heat of the working medium in contrast to the cooling by sensible heat of water. By cooling with latent heat, the required amount of medium can be reduced. Does not cause. However, the conventional cooling method using latent heat of a medium has a problem that the medium used for cooling is liquefied again by a condenser or the like, and this heat is simply lost.

本発明は上述の点に鑑みてなされたもので、作動媒体の潜熱により潤滑油冷却器、発電機、インバータ、制御盤等冷却を必要とする各部を冷却し、且つ該冷却により作動媒体が加熱された熱も有効に回収できる発電装置及びその運転方法を提供することを目的とする。   The present invention has been made in view of the above-described points. Cooling of each part that requires cooling, such as a lubricating oil cooler, a generator, an inverter, and a control panel, is performed by latent heat of the working medium, and the working medium is heated by the cooling. An object of the present invention is to provide a power generation apparatus that can effectively recover the generated heat and an operation method thereof.

上記課題を解決するため請求項１に記載の発明は、排熱等を回収して作動媒体の高圧蒸気を生成する蒸気発生器と、該高圧蒸気を膨張させることにより発電機を駆動する膨張機と、該膨張機を駆動した後の蒸気を凝縮する凝縮器と、該凝縮器にて凝縮した作動媒体の凝縮液を加圧して前記蒸気発生器に送り込む媒体循環ポンプを有する動力回収装置を備えた発電装置であって、冷却を必要とする各部の少なくとも一つに前記凝縮器にて凝縮した作動媒体の凝縮液を冷却媒体として送り、冷却に供した該作動媒体を前記凝縮器に戻す冷却媒体ポンプと、該凝縮器に戻る作動媒体と前記媒体循環ポンプで前記蒸気発生器へ送液する作動媒体の凝縮液との間で熱交換を行ない熱を回収する熱回収器を設けたこと特徴とする。   In order to solve the above-mentioned problems, a first aspect of the present invention provides a steam generator that recovers exhaust heat or the like to generate high-pressure steam as a working medium, and an expander that drives a generator by expanding the high-pressure steam. And a condenser for condensing the steam after driving the expander, and a power recovery device having a medium circulation pump that pressurizes the condensate of the working medium condensed in the condenser and sends it to the steam generator The power generation device is a cooling device in which the condensate of the working medium condensed in the condenser is sent as a cooling medium to at least one of the parts requiring cooling, and the working medium used for cooling is returned to the condenser. A heat recovery unit that recovers heat by exchanging heat between the medium pump and the working medium that returns to the condenser and the condensate of the working medium that is sent to the steam generator by the medium circulation pump; And

請求項２に記載の発明は、請求項１に記載の発電装置において、前記冷却を必要とする各部の少なくとも１つは、前記冷却媒体ポンプで送られた作動媒体の凝縮液の気化熱により冷却されることを特徴とする。   According to a second aspect of the present invention, in the power generation device according to the first aspect, at least one of the parts that require cooling is cooled by the heat of vaporization of the condensate of the working medium sent by the cooling medium pump. It is characterized by being.

請求項３に記載の発明は、請求項１又は２に記載の発電装置において、前記冷却を必要とする各部は、潤滑油を冷却する潤滑油冷却器、前記発電機の出力を周波数変換するインバータ、制御盤であることを特徴とする。   According to a third aspect of the present invention, in the power generation device according to the first or second aspect, each of the parts that require cooling includes a lubricating oil cooler that cools lubricating oil, and an inverter that converts the frequency of the output of the generator A control panel.

請求項４に記載の発明は、排熱等を回収して作動媒体の高圧蒸気を生成する蒸気発生器と、該高圧蒸気を膨張させることにより発電機を駆動する膨張機と、該膨張機を駆動した後の蒸気を凝縮する凝縮器と、該凝縮器にて凝縮した作動媒体の凝縮液を加圧して前記蒸気発生器に送り込む媒体循環ポンプを有する動力回収装置を備えた発電装置の運転方法であって、冷却を必要とする各部の少なくとも一つに前記凝縮器にて凝縮した作動媒体の凝縮液を送液して冷却し、該冷却に供した作動媒体を、前記媒体循環ポンプで前記蒸気発生器へ送液する作動媒体の凝縮液で冷却することを特徴とする。   The invention according to claim 4 is a steam generator that recovers exhaust heat or the like to generate high-pressure steam of a working medium, an expander that drives a generator by expanding the high-pressure steam, and the expander. Condenser for condensing steam after driving, and operating method of power generator including power recovery device having medium circulation pump for pressurizing condensate of working medium condensed in the condenser and feeding it to the steam generator In this case, the working fluid condensed in the condenser is sent to at least one of the parts that needs to be cooled to cool the working medium, and the working medium used for the cooling is sent by the medium circulation pump. It cools with the condensate of the working medium sent to a steam generator.

請求項１に記載の発明によれば、冷却を必要とする各部の少なくとも一つに凝縮器にて凝縮した作動媒体の凝縮液を冷却媒体として送り、冷却に供した該作動媒体を凝縮器に戻す冷却媒体ポンプと、該凝縮器に戻る作動媒体と媒体循環ポンプで蒸気発生器へ送液する作動媒体の凝縮液との間で熱交換を行ない熱を回収する熱回収器を設けたので、凝縮器の凝縮液で各部を効果的に冷却できると共に、冷却により加熱された作動媒体の熱も有効に回収できる発電装置を提供できる。   According to the first aspect of the present invention, the condensate of the working medium condensed in the condenser is sent as a cooling medium to at least one of the parts requiring cooling, and the working medium used for cooling is sent to the condenser. Since there is provided a heat recovery device that recovers heat by performing heat exchange between the cooling medium pump that returns and the working medium that returns to the condenser and the condensate of the working medium that is sent to the steam generator by the medium circulation pump. It is possible to provide a power generator that can effectively cool each part with the condensate of the condenser and can also effectively recover the heat of the working medium heated by the cooling.

請求項２に記載の発明によれば、冷却を必要とする各部の少なくとも１つは、冷却媒体ポンプで送られた作動媒体の凝縮液の気化熱により冷却されるから、凝縮液の大きな潜熱で冷却されることになり、作動媒体の流量が少なくて済み冷却部の小型化により機器の小型化が可能になると共に、作動媒体ポンプ及び配管等の小型化が可能となる。   According to the second aspect of the present invention, at least one of the parts that require cooling is cooled by the heat of vaporization of the condensate in the working medium sent by the cooling medium pump. Since the cooling medium is cooled, the flow rate of the working medium is small, and the size of the cooling unit can be reduced, so that the size of the apparatus can be reduced, and the working medium pump and piping can be reduced in size.

請求項３に記載の発明によれば、冷却を必要とする各部は、潤滑油冷却器、インバ−タ、制御盤であるので、これらの機器を効果的に冷却できると共に、これらの機器で発生した熱も有効に回収でき、更にこれら各機器の小型化、作動媒体ポンプ及び配管等の小型化が可能となる。   According to invention of Claim 3, since each part which requires cooling is a lubricating oil cooler, an inverter, and a control panel, while being able to cool these apparatuses effectively, it generate | occur | produces with these apparatuses. The collected heat can also be effectively recovered, and further downsizing of these devices and downsizing of the working medium pump and piping can be achieved.

請求項４に記載の発明によれば、冷却を必要とする各部の少なくとも一つに凝縮器にて凝縮した作動媒体の凝縮液を送液して冷却し、該冷却に供した作動媒体を、媒体循環ポンプで蒸気発生器へ送液する作動媒体の凝縮液で冷却するので、凝縮器の凝縮液で各部を効果的に冷却できると共に、冷却により加熱された作動媒体の熱も有効に回収できる発電装置の運転方法を提供できる。   According to the fourth aspect of the present invention, the working medium condensed in the condenser is sent to at least one of the parts that need to be cooled and cooled, and the working medium used for the cooling is Cooling with the condensate of the working medium sent to the steam generator by the medium circulation pump, each part can be effectively cooled with the condensate of the condenser, and the heat of the working medium heated by the cooling can be effectively recovered. A method for operating the power generation apparatus can be provided.

以下、本発明の実施の形態例を図面に基いて説明する。図１は本発明に係る発電装置のシステム構成を示す図である。図示するように、発電装置は蒸気発生器１０、気液分離器１１、発電機１２、タービン１３、凝縮器１４、媒体循環ポンプ１５を具備する。蒸気発生器１０で排熱等を回収して凝縮器１４からの作動媒体の凝縮液１０１を加熱し、該作動媒体の高圧蒸気１００を生成する。高圧蒸気１００は気液分離器１１で気液分離されて液分が除去され、高圧蒸気１００は三方弁１６を介して膨張機であるタービン１３に供給され、発電機１２が駆動される。タービン１３を駆動した後の低圧の作動媒体蒸気１００’は凝縮器１４で凝縮され作動媒体の凝縮液１０１となり、媒体循環ポンプ１５により逆止弁１７を通り蒸気発生器１０に送り込まれる。このように、蒸気発生器１０、発電機１２、タービン１３、凝縮器１４、媒体循環ポンプ１５で、排熱から動力を回収するクローズドシステムの動力回収装置を構成している。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a system configuration of a power generator according to the present invention. As shown in the figure, the power generator includes a steam generator 10, a gas-liquid separator 11, a generator 12, a turbine 13, a condenser 14, and a medium circulation pump 15. The steam generator 10 collects exhaust heat and the like, and heats the condensate 101 of the working medium from the condenser 14 to generate the high-pressure steam 100 of the working medium. The high-pressure steam 100 is gas-liquid separated by the gas-liquid separator 11 to remove the liquid component, and the high-pressure steam 100 is supplied to the turbine 13 that is an expander via the three-way valve 16 to drive the generator 12. The low-pressure working medium vapor 100 ′ after driving the turbine 13 is condensed by the condenser 14 to become a condensate 101 of the working medium, and is sent to the steam generator 10 through the check valve 17 by the medium circulation pump 15. Thus, the steam generator 10, the generator 12, the turbine 13, the condenser 14, and the medium circulation pump 15 constitute a power recovery device of a closed system that recovers power from exhaust heat.

気液分離器１１で高圧蒸気１００から分離された作動媒体液１０２は再び蒸気発生器１０に戻る。蒸気発生器１０に供給される排熱回収用流体１０３としては、２００〜４００℃程度の排ガス或いは１００〜１５０℃の排温水等がある。また、凝縮器１４に供給される冷却媒体としては冷却水等がある。発電機１２及びタービン１３の主軸２１は発電機側軸受１８、主軸受１９、及び後述するタービン側軸受２８（図２参照）で支持されており、発電機側軸受１８、主軸受１９、タービン側軸受２８には潤滑油系２０が接続され、潤滑油循環ポンプ２２で潤滑油が供給されるようになっている。また、潤滑油系２０には潤滑油冷却器２３が設けられている。また、発電機１２で発電された電力１０６はインバータに送られ、該インバータ２４で周波数変換され（例えば５０Ｈｚ或いは６０Ｈｚ・２００Ｖ）、各部に送電される。また、図示を省略するが、発電装置には各機器を制御するための制御盤が設けられている。上記では、潤滑油循環ポンプの吸込側に潤滑油冷却器２３を設けているが、吐出側に設ける場合もある。   The working medium liquid 102 separated from the high-pressure steam 100 by the gas-liquid separator 11 returns to the steam generator 10 again. Examples of the exhaust heat recovery fluid 103 supplied to the steam generator 10 include exhaust gas of about 200 to 400 ° C., exhaust hot water of 100 to 150 ° C., and the like. The cooling medium supplied to the condenser 14 includes cooling water. The main shaft 21 of the generator 12 and the turbine 13 is supported by a generator-side bearing 18, a main bearing 19, and a turbine-side bearing 28 (see FIG. 2) to be described later. A lubricating oil system 20 is connected to the bearing 28, and lubricating oil is supplied by a lubricating oil circulation pump 22. The lubricating oil system 20 is provided with a lubricating oil cooler 23. In addition, the electric power 106 generated by the generator 12 is sent to an inverter, frequency-converted by the inverter 24 (for example, 50 Hz or 60 Hz · 200 V), and transmitted to each part. Moreover, although illustration is abbreviate | omitted, the control panel for controlling each apparatus is provided in the electric power generating apparatus. In the above description, the lubricating oil cooler 23 is provided on the suction side of the lubricating oil circulation pump, but may be provided on the discharge side.

上記構成の発電装置において、発電機側軸受１８、主軸受１９、タービン側軸受２８、発電機１２、凝縮器１４、制御盤は本発電装置の運転中に発熱するから、それを冷却するため、潤滑油冷却器２３、発電機１２、凝縮器１４、制御盤に冷却媒体を送り冷却する必要がある。そこで、本実施形態では、冷却媒体ポンプ２５を設け、凝縮器１４にて凝縮した作動媒体の凝縮液１０１を潤滑油冷却器２３、発電機１２、インバータ２４及び図示しない制御盤に供給している。そしてこれらを冷却した後の作動媒体（作動媒体液＋作動媒体蒸気）１０４が熱回収器２６に送られ、該熱回収器２６において媒体循環ポンプ１５により蒸気発生器１０に送られる凝縮器１４からの凝縮液１０１との間で熱交換が行なわれ、熱回収される。熱回収された作動媒体１０４は膨張弁２７を通って、凝縮器１４に戻される。この膨張弁２７は熱回収器２６内の凝縮温度を一定にするために設けるが、単なるオリフィス、又は液封を用いてもよい。また、冷却媒体ポンプ２５に代えて、媒体循環ポンプ１５から吐出される凝縮液１０１の一部を減圧して、潤滑油冷却器２３、発電機１２、インバータ２４、制御盤に供給するようにしてもよい。   In the power generation apparatus having the above configuration, the generator side bearing 18, the main bearing 19, the turbine side bearing 28, the generator 12, the condenser 14, and the control panel generate heat during operation of the power generation apparatus. It is necessary to send a cooling medium to the lubricating oil cooler 23, the generator 12, the condenser 14, and the control panel for cooling. Therefore, in this embodiment, the cooling medium pump 25 is provided, and the condensate 101 of the working medium condensed by the condenser 14 is supplied to the lubricating oil cooler 23, the generator 12, the inverter 24, and a control panel (not shown). . Then, the working medium (working medium liquid + working medium vapor) 104 after cooling them is sent to the heat recovery unit 26, and from the condenser 14 sent to the steam generator 10 by the medium circulation pump 15 in the heat recovery unit 26. The heat exchange is performed with the condensate 101 and the heat is recovered. The heat-recovered working medium 104 is returned to the condenser 14 through the expansion valve 27. The expansion valve 27 is provided to keep the condensation temperature in the heat recovery unit 26 constant, but a simple orifice or liquid seal may be used. In place of the cooling medium pump 25, a part of the condensate 101 discharged from the medium circulation pump 15 is decompressed and supplied to the lubricating oil cooler 23, the generator 12, the inverter 24, and the control panel. Also good.

上記クローズドシステムの発電装置は、いわゆるランキンサイクルを利用した発電装置である。作動媒体としては、沸点が４０℃前後のＨＦＣ１２３あるいはトリフルオロエタノール（ＣＦ3ＣＨ2ＯＨ）等を用いている。これらの作動媒体は沸点が４０℃前後と低いから、この作動媒体の凝縮液１０１を潤滑油冷却器２３、発電機１２、インバータ２４及び制御盤に送りこれらを冷却することにより、少なくともその一部は気化し、大きい潜熱で冷却することになるから、少ない流量の作動媒体で効果的に冷却することができる。従って、冷却媒体ポンプ２５の容量及び配管の径を小さくできると共に、潤滑油冷却器２３、発電機１２、凝縮器１４及び制御盤の冷却部を小さくできるから、これらの小型化が可能となる。なお、ここでは、潤滑油冷却器２３、発電機１２、インバータ２４及び制御盤の全部に凝縮液１０１を送る例を示したが、例えば、発電機１２や潤滑油冷却器２３のように特に冷却を必要とするものにのみ送液してもよい。 The power generator of the closed system is a power generator using a so-called Rankine cycle. As the working medium, HFC123 or trifluoroethanol (CF 3 CH 2 OH) having a boiling point of around 40 ° C. is used. Since these working media have a low boiling point of around 40 ° C., the condensate 101 of this working medium is sent to the lubricating oil cooler 23, the generator 12, the inverter 24 and the control panel to cool them, so that at least a part thereof Is vaporized and cooled with a large latent heat, so that it can be effectively cooled with a small flow rate of the working medium. Accordingly, the capacity of the cooling medium pump 25 and the diameter of the piping can be reduced, and the lubricating oil cooler 23, the generator 12, the condenser 14, and the cooling part of the control panel can be reduced, and thus the size can be reduced. In addition, although the example which sends the condensate 101 to all of the lubricating oil cooler 23, the generator 12, the inverter 24, and the control panel was shown here, especially cooling like the generator 12 and the lubricating oil cooler 23, for example. The liquid may be sent only to those that require the liquid.

図２はタービン１３と発電機１２で構成されるガスタービン発電機の構成例を示す図である。ガスタービン発電機は、軸流式のタービン１３とＤＣブラシレスの発電機１２とを備え、タービンロータ１３−１と発電機ロータ１２−１とが一体的に単一軸の主軸２１に固定されている。このタービン発電機は、縦置きであり、主軸２１の上部にタービンロータ１３−１が固定され、主軸２１の下部に発電機ロータ１２−１が固定されている。但し、このタービン発電機を図１に示すように横置きにして使用してもよいことは勿論である。   FIG. 2 is a diagram illustrating a configuration example of a gas turbine generator including the turbine 13 and the generator 12. The gas turbine generator includes an axial-flow turbine 13 and a DC brushless generator 12, and the turbine rotor 13-1 and the generator rotor 12-1 are integrally fixed to a single-shaft main shaft 21. . This turbine generator is installed vertically, the turbine rotor 13-1 is fixed to the upper part of the main shaft 21, and the generator rotor 12-1 is fixed to the lower part of the main shaft 21. However, as a matter of course, this turbine generator may be used in a horizontal position as shown in FIG.

タービンロータ１３−１には、複数の動翼１３−２が軸方向に配列して固定され、その動翼１３−２の外側に複数の静翼１３−３を備えたタービンケーシング１３−４が配置されている。また、タービンケーシング１３−４の外側には外胴１３−５が設けられ、タービンケーシング１３−４と外胴１３−５の間をタービン１３を回転駆動した後の作動媒体の低圧の作動媒体蒸気１００’が流れる流路１３−６を構成している。タービン１３の吸込側には、吸込管１３−７が配置され、タービン１３の吸込側に作動媒体の高圧蒸気１００が流入するガス流路１３−８を構成している。即ち吸込管１３−７は、タービン１３の外胴１３−５、又は外胴１３−５に接続されるタービン吐出管１３−９の内部に収容され、タービン吸込管１３−７とタービン吐出管１３−９とが二重構造となっている。従って、二重管の内側のタービン吸込管１３−７からタービン１３に流入した作動媒体の高圧蒸気１００はタービンロータ１３−１を回転駆動し、低圧となった作動媒体蒸気１００’が二重管の外周部であるタービン吐出管１３−９を通って流出する。   A turbine casing 13-4 having a plurality of blades 13-2 arranged in an axial direction and fixed to the turbine rotor 13-1 and having a plurality of stationary blades 13-3 outside the blades 13-2. Has been placed. Also, an outer cylinder 13-5 is provided outside the turbine casing 13-4, and the low-pressure working medium vapor of the working medium after the turbine 13 is rotationally driven between the turbine casing 13-4 and the outer cylinder 13-5. It constitutes a flow path 13-6 through which 100 'flows. A suction pipe 13-7 is arranged on the suction side of the turbine 13, and configures a gas flow path 13-8 into which the high-pressure steam 100 of the working medium flows into the suction side of the turbine 13. That is, the suction pipe 13-7 is accommodated in the outer cylinder 13-5 of the turbine 13 or the turbine discharge pipe 13-9 connected to the outer cylinder 13-5, and the turbine suction pipe 13-7 and the turbine discharge pipe 13 are accommodated. -9 has a double structure. Therefore, the high-pressure steam 100 of the working medium that has flowed into the turbine 13 from the turbine suction pipe 13-7 inside the double pipe rotates the turbine rotor 13-1, and the low-pressure working medium steam 100 'is double pipe. It flows out through the turbine discharge pipe 13-9 which is the outer peripheral portion of.

発電機１２は永久磁石をその円周面に沿って交互に配置した永久磁石型のロータにより構成され、発電機ロータ１２−１の周囲には僅かなクリアランスを介して発電機ステータ１２−２が配置されている。また、発電機ステータ１２−２の外周部には冷却ジャケット１２−３が設けられ、冷却液として作動媒体である凝縮器１４からの凝縮液１０１が供給され、発電機１２、特に発電機ステータ１２−２を凝縮液１０１の潜熱（気化熱）により効率的に冷却する。   The generator 12 is composed of a permanent magnet type rotor in which permanent magnets are alternately arranged along the circumferential surface thereof, and a generator stator 12-2 is provided around the generator rotor 12-1 with a slight clearance. Has been placed. Further, a cooling jacket 12-3 is provided on the outer peripheral portion of the generator stator 12-2, and the condensate 101 from the condenser 14 which is a working medium is supplied as a coolant, and the generator 12, particularly the generator stator 12 is supplied. -2 is efficiently cooled by the latent heat (heat of vaporization) of the condensate 101.

この発電機１２はＤＣブラシレス型の交流発電機であり、その発電出力は発電機ステータ１２−２に設けられた巻線部から動力線３０を介して外部に取り出される。動力線はコネクタ２４−１を介して周波数変換を行なうインバータ２４に接続される（図１参照）。   The generator 12 is a DC brushless type AC generator, and the output of the generator 12 is taken out from the winding portion provided in the generator stator 12-2 via the power line 30. The power line is connected to an inverter 24 that performs frequency conversion via a connector 24-1 (see FIG. 1).

主軸２１はタービン１３と発電機１２との間の略中央部で主軸受１９により支持されている。主軸受１９はアンギュラ玉軸受１９−１、１９−２を並列に配置して構成したものであり、タービンロータ１３−１と発電機ロータ１２−１とを含めた回転体全体の略重心位置に配置されている。そして、タービンロータ１３−１の反発電機側、即ちタービン１３の高圧側の主軸端部には単列のアンギュラ玉軸受からなるタービン側軸受２８を備えている。また、発電機ロータ１２−１の反タービン側の主軸端部には、同様に単列のアンギュラ玉軸受からなる発電機側軸受１８が配置されている。   The main shaft 21 is supported by a main bearing 19 at a substantially central portion between the turbine 13 and the generator 12. The main bearing 19 is configured by arranging angular ball bearings 19-1 and 19-2 in parallel, and is located at a substantially center of gravity of the entire rotating body including the turbine rotor 13-1 and the generator rotor 12-1. Has been placed. The turbine rotor 13-1 is provided with a turbine-side bearing 28 formed of a single-row angular contact ball bearing at the end of the main shaft on the counter-generator side of the turbine rotor 13-1, that is, the high-pressure side of the turbine 13. Similarly, a generator-side bearing 18 composed of a single-row angular ball bearing is disposed at the end of the main shaft on the counter-turbine side of the generator rotor 12-1.

主軸受１９、タービン側軸受２８には、潤滑・冷却のために潤滑油が供給される。潤滑油循環ポンプ２２（図１参照）から吐出された潤滑油は潤滑油系２０から潤滑油供給配管３１ａ、３２ａを通って主軸受１９及びタービン側軸受２８に流れ、並列に供給され、潤滑油回収用配管３１ｂ、３２ｂ及び潤滑油系２０通って潤滑油循環ポンプ２２に戻る。発電機側軸受１８にも潤滑油が潤滑油系２０から潤滑油供給配管３３ａを通って供給され、図示しない潤滑油回収用配管を通って潤滑油循環ポンプ２２に戻る。潤滑油系２０を循環する潤滑油は、上述のように潤滑油冷却器２３で凝縮器１４からの凝縮液１０１で冷却される。   Lubricating oil is supplied to the main bearing 19 and the turbine side bearing 28 for lubrication and cooling. The lubricating oil discharged from the lubricating oil circulation pump 22 (see FIG. 1) flows from the lubricating oil system 20 through the lubricating oil supply pipes 31a and 32a to the main bearing 19 and the turbine side bearing 28, and is supplied in parallel. It returns to the lubricating oil circulation pump 22 through the recovery pipes 31b and 32b and the lubricating oil system 20. Lubricating oil is also supplied to the generator-side bearing 18 from the lubricating oil system 20 through the lubricating oil supply pipe 33a, and returns to the lubricating oil circulation pump 22 through a lubricating oil recovery pipe (not shown). The lubricating oil circulating in the lubricating oil system 20 is cooled by the condensate 101 from the condenser 14 in the lubricating oil cooler 23 as described above.

上記のように、冷却媒体ポンプ２５により、凝縮器１４からの凝縮液１０１を発電機１２、潤滑油冷却器２３及びインバータ２４に供給し、冷却に供しているが、これらの機器の少なくとも一つは凝縮液１０１の気化、即ち作動媒体の凝縮液１０１の潜熱により、冷却されるようになっている。   As described above, the cooling medium pump 25 supplies the condensate 101 from the condenser 14 to the generator 12, the lubricating oil cooler 23, and the inverter 24 for cooling. At least one of these devices is used. Is cooled by vaporization of the condensate 101, that is, latent heat of the condensate 101 of the working medium.

以上本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲、及び明細書と図面に記載された技術的思想の範囲内において種々の変形が可能である。例えば、冷却する機器は、潤滑油冷却器２３、発電機１２、インバータ２４及び制御盤に限定されるものではなく、発電装置を構成する機器の冷却を必要とする部位に冷却媒体ポンプ２５により凝縮器１４からの作動媒体の凝縮液１０１を供給し、冷却に供した後、回収した作動媒体を熱回収器２６で熱回収した後、膨張弁２７を介して凝縮器１４に戻すようにしてもよい。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, the equipment to be cooled is not limited to the lubricating oil cooler 23, the generator 12, the inverter 24, and the control panel, but is condensed by the cooling medium pump 25 to a portion that requires cooling of the equipment constituting the power generation apparatus. After supplying the condensate 101 of the working medium from the vessel 14 and cooling it, the recovered working medium is recovered by the heat recovery unit 26 and then returned to the condenser 14 via the expansion valve 27. Good.

本発明に係る発電装置のシステム構成を示す図である。It is a figure which shows the system configuration | structure of the electric power generating apparatus which concerns on this invention. 本発明に係る発電装置のガスタービン発電機の構成例を示した断面図である。）It is sectional drawing which showed the structural example of the gas turbine generator of the electric power generating apparatus which concerns on this invention. )

符号の説明Explanation of symbols

１０ 蒸気発生器
１１ 気液分離器
１２ 発電機
１３ タービン
１４ 凝縮器
１５ 媒体循環ポンプ
１６ 三方弁
１７ 逆止弁
１８ 発電機側軸受
１９ 主軸受
２０ 潤滑油系
２１ 主軸
２２ 潤滑油循環ポンプ
２３ 潤滑油冷却器
２４ インバータ
２５ 冷却媒体ポンプ
２６ 熱回収器
２７ 膨張弁
２８ タービン側軸受 DESCRIPTION OF SYMBOLS 10 Steam generator 11 Gas-liquid separator 12 Generator 13 Turbine 14 Condenser 15 Medium circulation pump 16 Three-way valve 17 Check valve 18 Generator side bearing 19 Main bearing 20 Lubricating oil system 21 Main shaft 22 Lubricating oil circulation pump 23 Lubricating oil Cooler 24 Inverter 25 Cooling medium pump 26 Heat recovery device 27 Expansion valve 28 Turbine side bearing

Claims (4)

排熱等を回収して作動媒体の高圧蒸気を生成する蒸気発生器と、該高圧蒸気を膨張させることにより発電機を駆動する膨張機と、該膨張機を駆動した後の蒸気を凝縮する凝縮器と、該凝縮器にて凝縮した作動媒体の凝縮液を加圧して前記蒸気発生器に送り込む媒体循環ポンプを有する動力回収装置を備えた発電装置であって、
冷却を必要とする各部の少なくとも一つに前記凝縮器にて凝縮した作動媒体の凝縮液を冷却媒体として送り、冷却に供した該作動媒体を前記凝縮器に戻す冷却媒体ポンプと、該凝縮器に戻る作動媒体と前記媒体循環ポンプで前記蒸気発生器へ送液する作動媒体の凝縮液との間で熱交換を行ない熱を回収する熱回収器を設けたこと特徴とする発電装置。 A steam generator that recovers waste heat and the like to generate high-pressure steam as a working medium, an expander that drives a generator by expanding the high-pressure steam, and a condensation that condenses the steam after driving the expander And a power recovery device including a power recovery device having a medium circulation pump that pressurizes the condensate of the working medium condensed in the condenser and sends the condensed liquid to the steam generator,
A cooling medium pump that sends a condensate of the working medium condensed in the condenser to at least one of the parts that require cooling as a cooling medium, and returns the working medium subjected to cooling to the condenser; and the condenser A power generator comprising: a heat recovery unit that performs heat exchange between the working medium that returns to step 1 and the condensate of the working medium that is sent to the steam generator by the medium circulation pump to recover heat. 請求項１に記載の発電装置において、
前記冷却を必要とする各部の少なくとも１つは、前記冷却媒体ポンプで送られた作動媒体の凝縮液の気化熱により冷却されることを特徴とする発電装置。 The power generator according to claim 1,
At least 1 of each part which requires the said cooling is cooled by the heat of vaporization of the condensate of the working medium sent with the said cooling medium pump. 請求項１又は２に記載の発電装置において、
前記冷却を必要とする各部は、潤滑油を冷却する潤滑油冷却器、前記発電機の出力を周波数変換するインバータ、制御盤であることを特徴とする発電装置。 The power generator according to claim 1 or 2,
The parts that require cooling are a lubricating oil cooler that cools lubricating oil, an inverter that converts the frequency of the output of the generator, and a control panel. 排熱等を回収して作動媒体の高圧蒸気を生成する蒸気発生器と、該高圧蒸気を膨張させることにより発電機を駆動する膨張機と、該膨張機を駆動した後の蒸気を凝縮する凝縮器と、該凝縮器にて凝縮した作動媒体の凝縮液を加圧して前記蒸気発生器に送り込む媒体循環ポンプを有する動力回収装置を備えた発電装置の運転方法であって、
冷却を必要とする各部の少なくとも一つに前記凝縮器にて凝縮した作動媒体の凝縮液を送液して冷却し、該冷却に供した作動媒体を、前記媒体循環ポンプで前記蒸気発生器へ送液する作動媒体の凝縮液で冷却することを特徴とする発電装置の運転方法。 A steam generator that recovers waste heat and the like to generate high-pressure steam as a working medium, an expander that drives a generator by expanding the high-pressure steam, and a condensation that condenses the steam after driving the expander And a method of operating a power generator including a power recovery device having a medium circulation pump that pressurizes the condensate of the working medium condensed in the condenser and feeds it to the steam generator,
The condensate of the working medium condensed in the condenser is sent to at least one of the parts that require cooling to cool it, and the working medium used for the cooling is sent to the steam generator by the medium circulation pump. A method for operating a power generation apparatus, characterized by cooling with a condensate of a working medium to be fed.
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