JP2005003257A - Hot water production equipment - Google Patents

Hot water production equipment Download PDF

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Publication number
JP2005003257A
JP2005003257A JP2003166224A JP2003166224A JP2005003257A JP 2005003257 A JP2005003257 A JP 2005003257A JP 2003166224 A JP2003166224 A JP 2003166224A JP 2003166224 A JP2003166224 A JP 2003166224A JP 2005003257 A JP2005003257 A JP 2005003257A
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heat
hot water
prime mover
heat exchanger
pipe
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Ryosuke Tsujisaki
良輔 辻前
Masasuke Nakajima
雅祐 中島
Hiroto Itagaki
弘人 板垣
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IHI Corp
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Ishikawajima Harima Heavy Industries Co Ltd
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    • 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
    • Y02E20/14—Combined heat and power generation [CHP]
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

【課題】省エネルギー上及び経済上有利な温水製造装置を提供する。
【解決手段】原動機１の廃熱で加熱された冷却用水Ｗにより、蓄熱材としてパラフィンを界面活性剤を用いて水中に微細粒子として分散させた熱媒体Ｈを加熱する蓄熱用熱交換器１５と、蓄熱用熱交換器１５で加熱された熱媒体Ｈを貯留して蓄熱する蓄熱槽１６と、蓄熱槽１６からの熱媒体Ｈにより給水Ｗｓを加熱して温水Ｗｈを製造する放熱用熱交換器１７を設ける。
【選択図】 図１An apparatus for producing hot water that is advantageous in terms of energy saving and economy is provided.
A heat storage heat exchanger 15 for heating a heat medium H in which paraffin is dispersed as fine particles in water using a surfactant as a heat storage material by cooling water W heated by waste heat of a prime mover 1; The heat storage tank 16 that stores and stores the heat medium H heated by the heat storage heat exchanger 15, and the heat dissipation heat exchanger that heats the water supply Ws by the heat medium H from the heat storage tank 16 to produce the hot water Wh 17 is provided.
[Selection] Figure 1

Description

【０００１】
【発明の属する技術分野】
本発明は温水製造装置に関するものである。
【０００２】
【従来の技術】
近年、原動機を駆動して発電機を回転させ、発電を行うと共に、原動機からの排ガスの廃熱を廃熱ボイラで回収するようにしたコージェネレーション設備が利用されている。
【０００３】
而して、斯かるコージェネレーション設備では、発電時の原動機廃熱により熱交換器を介し給水を加熱し、加熱された給水は温水として貯湯槽に貯湯されて給湯や冷暖房等の熱需要に供することが行われており、斯かる温水を製造するための温水製造装置の一例は図３に示されている。
【０００４】
図中、１はガスエンジン等の原動機、２は原動機１により駆動される発電機、３は原動機１よりの原動機排ガスＧｈから熱を回収する廃熱ボイラであり、原動機１により発電機２が駆動されて発電が行われるようになっていると共に、原動機排ガスＧｈは廃熱ボイラ３に送給されて廃熱が回収されるようになっている。
【０００５】
４は廃熱回収熱交換器、５，６は原動機１のジャケット１ａと廃熱回収熱交換器４とを連結する管路、７は管路５に設けたポンプである。而して、ジャケット１ａ内を流れることにより原動機廃熱を吸収して原動機１を冷却した高温の冷却用水Ｗは、ポンプ７により管路５から廃熱回収熱交換器４へ送給され、廃熱回収熱交換器４で放熱したうえ、管路６から原動機１のジャケット１ａへ導入されて再び原動機廃熱を吸収し得るようになっている。
【０００６】
８は廃熱回収熱交換器４に接続された管路、９は廃熱回収熱交換器４と貯湯槽１０を接続する管路、１１は管路９の中途部に設けられた三方切換弁、１２は管路８の中途部と三方切換弁１１を接続する管路、Ｗｓは管路８から廃熱回収熱交換器４へ導入される給水、Ｗｈは管路９から貯湯槽１０へ送給される温水である。
【０００７】
上記温水製造装置において昼間の原動機１の稼動時間帯に温水Ｗｈを製造する場合には、三方切換弁１１は、管路１２，９が遮断され、管路９は三方切換弁１１の前後部で連通するよう切換えられている。而して、原動機１が例えばガスエンジンの場合には、空気と燃料ガスの混合流体が原動機１のピストン内に供給されて燃料が酸素と協働して爆発燃焼する。このため、クランク軸を介し発電機２が駆動され、発電が行われる。原動機１からの原動機排ガスＧｈは廃熱ボイラ３へ送給されて廃熱が回収され、蒸気等が生成される。
【０００８】
又、原動機１のジャケット１ａを通過することにより、原動機廃熱を吸収して原動機１を冷却した高温の冷却用水Ｗは、ポンプ７により管路５を経て廃熱回収熱交換器４へ送給され、管路８から廃熱回収熱交換器４へ導入された給水Ｗｓと熱交換して給水Ｗｓを加熱し、温水Ｗｈを生成させ、管路６を通ってジャケット１ａへ戻され、再び原動機廃熱を吸収して原動機１を冷却し、管路５へ送出される。生成された温水Ｗｈは、管路９から貯湯槽１０へ送給されて貯湯され、適宜使用される。
【０００９】
又、給水Ｗｓを直接貯湯槽１０へ送給する場合は、管路１２と管路９の三方切換弁１１接続部下流側が連通し、管路９が三方切換弁１１の前後部で遮断されるよう、三方切換弁１１を切換える。このため、給水Ｗｓは廃熱回収熱交換器４を経ることなく、貯湯槽１０へ送給される。
【００１０】
更に、コージェネレーション設備において、発電時の原動機廃熱で給水を加熱して温水を製造し、給湯を行うようにした装置としては、特許文献１に示す装置がある。特許文献１では、昼間の発電時に発電用エンジン等の原動機で生じた廃熱を吸熱した熱媒体は、管路から熱交換器に送給されて給水が加熱され、生成された温水は、給湯口から給湯されるようになっている。
【００１１】
【特許文献１】
特開２００１−３１７０８号公報
【００１２】
【発明が解決しようとする課題】
コージェネレーション設備に設けられた上記各温水製造装置では、昼間の原動機稼動時間帯は、原動機が稼動されて発電が行われているため、原動機廃熱を有効に利用することができる。しかし、夜間の原動機稼動時間帯外には原動機は停止されているため、原動機廃熱は発生せず、従って、温水の温度は下降するため、昼間に回収された原動機廃熱は無駄に捨てられることになり、省エネルギー及び経済上不利である。
【００１３】
本発明は上記実情に鑑み、コージェネレーション設備に設置される、省エネルギー上及び経済上有利な温水製造装置を提供することを目的としてなしたものである。
【００１４】
【課題を解決するための手段】
請求項１の温水製造装置は、原動機の廃熱で加熱された冷却用水により、蓄熱材を含む熱媒体を加熱する第一の熱交換器と、該第一の熱交換器で加熱された熱媒体を貯留して蓄熱する蓄熱槽と、該蓄熱槽からの熱媒体により給水を加熱して温水を製造する第二の熱交換器を設けたものである。
【００１５】
請求項２の温水製造装置は、第二の熱交換器で生成された温水を貯湯するための貯湯槽を設けたものである。
【００１６】
請求項３の温水製造装置においては、熱媒体は、蓄熱材としてパラフィンを用い、該パラフィンを界面活性剤を用いて水中に粒子として分散させたものであり、請求項４の温水製造装置においては、原動機はガスエンジンである。
【００１７】
本発明によれば、昼間の原動機稼動時間帯において原動機廃熱を有効に利用することができることは勿論、夜間の原動機稼動時間帯外には、原動機稼動時間帯に熱媒体を介し蓄熱槽に蓄熱した原動機廃熱により温水を製造することができ、従って、夜間においても、昼間に蓄熱された原動機廃熱を有効活用することができ、コージェネレーション設備の総合効率が向上して省エネルギー及び経済上有利であり、又、特にホテル、病院等、夜間に温水を必要とするユーザにおいて有効活用することができる。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態を添付図面を参照して説明する。
図１はコージェネレーション設備に適用される本発明の温水製造装置を実施する形態の一例である。本図示例では、昼間の原動機稼動時間帯においては、原動機廃熱を利用して温水Ｗｈを製造し得るようにすることに加えて、蓄熱材を有する熱媒体Ｈにより原動機廃熱を回収して蓄熱し、夜間の原動機稼動時間帯外においては、熱媒体Ｈに蓄熱した熱により、温水Ｗｈを製造し得るようにしている。図１中、図３に示すものと同一の符号のものは同一のものを示す。
【００１９】
図中、１３はポンプ７の下流側において管路５に接続された管路、１４は管路６に接続された管路、１５は蓄熱用熱交換器であり、管路１３，１４は蓄熱用熱交換器１５に接続されている。而して、ジャケット１ａ内を流れることにより原動機廃熱を吸収して原動機１を冷却した高温の冷却用水Ｗの一部は、管路５，１３から蓄熱用熱交換器１５へ送給され、蓄熱用熱交換器１５で放熱したうえ、管路１４，６から原動機１のジャケット１ａへ戻されて再び原動機廃熱を吸収し、管路５へ送出されるようになっている。
【００２０】
１６は蓄熱槽、１７は放熱用熱交換器、１８ａ，１８ｂは蓄熱用熱交換器１５と放熱用熱交換器１７とを連結するよう、三方切換弁１９を介し直列に接続された管路、２０ａ，２０ｂは蓄熱用熱交換器１５と放熱用熱交換器１７とを連結するよう、三方切換弁２１を介し直列に接続された管路、２２，２３は蓄熱槽１６と三方切換弁１９，２１とを連結する管路、２４は管路２２の中途部に設けたポンプである。蓄熱に用いられる熱媒体ＨはＰＣＭ（Ｐｈａｓｅ ＣｈａｎｇｅｄＭａｔｅｒｉａｌ）エマルジョンで、蓄熱材であるパラフィンを界面活性剤を用いて水中に微細粒子として分散させたものであり、蓄熱材が凝固しても融解しても、熱媒体Ｈの流動性は保持されるようになっている。
【００２１】
而して、昼間の原動機１の稼動時間帯（例えば、７時〜２２時）において蓄熱を行う場合には、熱媒体Ｈはポンプ２４により、蓄熱槽１６から管路２２、三方切換弁１９、管路１８ａを経て蓄熱用熱交換器１５へ送給され、高温の冷却用水Ｗと熱交換して加熱され、管路２０ａ、三方切換弁２１、管路２３を経て蓄熱槽１６へ戻され、蓄熱が行われるようになっている。又、夜間の原動機１の稼動時間帯外には、熱媒体Ｈはポンプ２４により、蓄熱槽１６から管路２２、三方切換弁１９、管路１８ｂを経て放熱用熱交換器１７へ送給され、給水Ｗｓと熱交換して放熱し、管路２０ｂ、三方切換弁２１、管路２３を経て蓄熱槽１６へ戻されるようになっている。
【００２２】
２５は三方切換弁１１の下流側において管路９と放熱用熱交換器１７を接続する管路、２６は放熱用熱交換器１７と貯湯槽１０とを接続する管路、２７は管路２６の中途部に設けられた三方切換弁、２８は管路２５の中途部と三方切換弁２７を接続する管路である。
【００２３】
而して、昼間の原動機１の稼動時間帯において廃熱回収熱交換器４により給水Ｗｓが加熱され、温水Ｗｈが生成された場合は、温水Ｗｈは、管路９、管路２５の管路２８接続部よりも上流側の部分、管路２８、三方切換弁２７、管路２６の三方切換弁２７接続部よりも下流側の部分を経て、貯湯槽１０へ送給されるようになっている。又、夜間の原動機１の稼動時間帯外の場合には、管路９、管路２５には放熱用熱交換器１７へ導入される給水Ｗｓが送給されるようになっており、放熱用熱交換器１７からの温水Ｗｈは、管路２６を経て貯湯槽１０へ送給されるようになっている。
【００２４】
次に、上記した実施の形態の作用を説明する。
原動機１の稼動時間帯には、三方切換弁１１は、管路１２，９が遮断され、管路９が三方切換弁１１の前後部で連通するよう、切換えられており、三方切換弁２７は、管路２８及び管路２６の三方切換弁２７よりも下流側の部分が連通し、管路２６は三方切換弁２７の前後部で遮断されるよう、切換えられている。又、三方切換弁１９は、管路２２，１８ａが連通し、管路２２，１８ｂが遮断されるよう、切換えられており、三方切換弁２１は、管路２０ａ，２３が連通し、管路２０ｂ，２３が遮断されるよう、切換えられている。
【００２５】
原動機１が駆動されると、原動機１からの原動機排ガスＧｈは廃熱ボイラ３へ送給されて廃熱が回収され、蒸気等が生成され、原動機１のジャケット１ａを通過した高温の冷却用水Ｗはポンプ７により吐出され、一部は図３の装置と同様にして廃熱回収熱交換器４へ送給され、管路８から廃熱回収熱交換器４へ導入された給水Ｗｓと熱交換し、給水Ｗｓを加熱して温水Ｗｈを生成させ、管路６を通ってジャケット１ａへ戻され、再び原動機廃熱を吸収して原動機１を冷却し、管路５へ送出される。廃熱回収熱交換器４からの温水Ｗｈは、管路９、三方切換弁１１、管路９、管路２５，２８、三方切換弁２７、管路２６を経て貯湯槽１０へ送給されて貯湯され、適宜使用される。
【００２６】
又、ジャケット１ａを通過してポンプ７により吐出された高温の冷却用水Ｗの一部は、管路５，１３を経て蓄熱用熱交換器１５へ送給され、管路１８ａから蓄熱用熱交換器１５へ導入された熱媒体Ｈを熱交換により加熱し、管路１４，６を経て原動機１のジャケット１ａへ戻され、再び原動機廃熱を吸収して管路５へ送出される。
【００２７】
蓄熱槽１６からの蓄熱材を含有する熱媒体Ｈは、ポンプ２４により、管路２２、三方切換弁１９、管路１８ａを経て蓄熱用熱交換器１５へ送給され、高温の冷却用水Ｗと熱交換して加熱され、管路２０ａ、三方切換弁２１、管路２３を経て蓄熱槽１６へ戻され、蓄熱が行われる。
【００２８】
原動機１の稼動時間帯外には、三方切換弁１１は、管路１２と管路９の三方切換弁１１よりも下流側の部分が連通し、管路９の三方切換弁１１前後部が遮断されるよう、切換えられ、三方切換弁２７は、管路２８と管路２６とが遮断され、管路２６の三方切換弁２７前後部が連通されるよう、切換えられている。又、三方切換弁１９は、管路２２と管路１８ｂが連通し、管路２２と管路１８ａが遮断されるよう、切換えられ、三方切換弁２１は、管路２０ｂと管路２３が連通し、管路２０ａと管路２３が遮断されるよう、切換えられている。
【００２９】
このため、蓄熱槽１６に蓄熱されている熱媒体Ｈは、ポンプ２４により、管路２２、三方切換弁１９、管路１８ｂを経て放熱用熱交換器１７へ送給され、管路８，１２、三方切換弁１１、管路９，２５から放熱用熱交換器１７へ導入された給水Ｗｓを熱交換により加熱して温水Ｗｈを生成させ、管路２０ｂ、三方切換弁２１、管路２３を経て蓄熱槽１６へ戻される。放熱用熱交換器１７において生成された温水Ｗｈは管路２６、三方切換弁２７、管路２６を通り、貯湯槽１０へ送給されて貯湯され、適宜使用される。
【００３０】
原動機１の稼動時間帯外に放熱用熱交換器１７で温水Ｗｈを製造する必要のない場合には、三方切換弁１１は、原動機１の稼動時間帯外における前述の切換え状態のままとし、三方切換弁２７は、管路２８と管路２６の三方切換弁２７よりも下流側の部分が連通し、管路２８と管路２６の三方切換弁２７よりも上流側の部分が遮断されるよう三方切換弁２７を切換える。このため、管路８からの給水Ｗｓは、廃熱回収熱交換器４及び放熱用熱交換器１７を通ることなく、貯湯槽１０へ送給される。
【００３１】
図２には図１に示す温水製造装置に用いられる冷却用水Ｗ、熱媒体Ｈ、給水Ｗｓ、給湯Ｗｈの温度線図が示されている。図中、イは冷却用水Ｗの温度線図、ロは熱媒体Ｈの温度線図、ハは給水Ｗｓ、給湯Ｗｈの温度線図である。図２において、Ｔ１は冷却用水Ｗの蓄熱用熱交換器１５入口における温度で、Ｔ１≒８０℃、Ｔ２は冷却用水Ｗの蓄熱用熱交換器１５出口における温度で、Ｔ２≒６５℃である。Ｔ３は熱媒体Ｈの蓄熱用熱交換器１５入口における温度、或は、熱媒体Ｈの放熱用熱交換器１７出口における温度で、Ｔ３≒６０℃、Ｔ４は熱媒体Ｈの蓄熱用熱交換器１５出口における温度、或は、熱媒体Ｈの放熱用熱交換器１７入口における温度で、Ｔ４≒７０℃である。Ｔ５は給水Ｗｓの放熱用熱交換器１７入口の温度で、Ｔ５≒１５℃、Ｔ６は温水Ｗｈの放熱用熱交換器１７出口の温度で、Ｔ６≒６０℃である。
【００３２】
本発明の図示例によれば、昼間の原動機稼動時間帯において原動機廃熱を有効に利用することができることは勿論、夜間の原動機稼動時間帯外には、原動機稼動時間帯に熱媒体Ｈにより蓄熱槽１６に蓄熱した原動機廃熱を用いて温水Ｗｈを製造することができる。従って、原動機稼動時間帯外においても、原動機稼動時間帯に蓄熱された原動機廃熱を有効活用することができ、コージェネレーション設備の総合効率が上昇して省エネルギー及び経済上有利である。又、これらの設備は特にホテル、病院等、夜間に温水を必要とするユーザにおいて有効活用することができる。
【００３３】
なお、本発明の温水製造装置においては、原動機としてガスエンジンを用いる場合について説明したが、ガスエンジン以外のエンジンや、各種タービンを用いても実施できること、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【００３４】
【発明の効果】
以上、説明したように本発明の請求項１〜４記載の温水製造装置によれば、昼間の原動機稼動時間帯において原動機廃熱を有効に利用することができることは勿論、夜間の原動機稼動時間帯外においても、原動機稼動時間帯に熱媒体により蓄熱槽に蓄熱した原動機廃熱を用いて温水を製造することができ、従って、夜間においても、昼間に蓄熱された原動機廃熱を有効活用することができ、コージェネレーション設備の総合効率が向上して省エネルギー及び経済上不利であり、又、特にホテル、病院等、夜間に温水を必要とするユーザにおいて有効活用することができる、等種々の優れた効果を奏し得る。
【図面の簡単な説明】
【図１】コージェネレーション設備に適用される本発明の温水製造装置の実施の形態の一例を示すフロー図である。
【図２】図１の温水製造装置に用いる冷却用水、熱媒体、給水、温水の温度線図を示すグラフである。
【図３】コージェネレーション設備に適用される従来の温水製造装置の一例を示すフロー図である。
【符号の説明】
１ 原動機
１０ 貯湯槽
１５ 蓄熱用熱交換器（第一の熱交換器）
１６ 蓄熱槽
１７ 放熱用熱交換器（第二の熱交換器）
Ｈ 熱媒体
Ｗ 冷却用水（冷却用流体）
Ｗｓ 給水
Ｗｈ 温水[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water production apparatus.
[0002]
[Prior art]
In recent years, cogeneration facilities have been used in which a prime mover is driven to rotate a generator to generate power, and waste heat of exhaust gas from the prime mover is recovered by a waste heat boiler.
[0003]
Thus, in such a cogeneration facility, the feed water is heated via the heat exchanger by the waste heat of the prime mover during power generation, and the heated feed water is stored as hot water in a hot water storage tank to be used for heat demand such as hot water supply and air conditioning. FIG. 3 shows an example of a hot water production apparatus for producing such hot water.
[0004]
In the figure, 1 is a prime mover such as a gas engine, 2 is a generator driven by the prime mover 1, 3 is a waste heat boiler that recovers heat from the prime mover exhaust gas Gh from the prime mover 1, and the prime mover 1 drives the generator 2 Thus, power generation is performed, and the engine exhaust gas Gh is supplied to the waste heat boiler 3 so that the waste heat is recovered.
[0005]
4 is a waste heat recovery heat exchanger, 5 and 6 are pipes connecting the jacket 1a of the motor 1 and the waste heat recovery heat exchanger 4, and 7 is a pump provided in the pipe 5. Thus, the high-temperature cooling water W that has absorbed the prime mover waste heat and cooled the prime mover 1 by flowing in the jacket 1a is sent from the pipe 5 to the waste heat recovery heat exchanger 4 by the pump 7, and is discarded. The heat is recovered by the heat recovery heat exchanger 4 and introduced into the jacket 1a of the prime mover 1 from the pipe 6 so that the prime mover waste heat can be absorbed again.
[0006]
8 is a pipe connected to the waste heat recovery heat exchanger 4, 9 is a pipe connecting the waste heat recovery heat exchanger 4 and the hot water tank 10, and 11 is a three-way selector valve provided in the middle of the pipe 9. , 12 is a pipe connecting the middle part of the pipe 8 and the three-way switching valve 11, Ws is water supplied from the pipe 8 to the waste heat recovery heat exchanger 4, and Wh is sent from the pipe 9 to the hot water tank 10. Hot water to be supplied.
[0007]
When the hot water Wh is produced during the daytime operating hours of the prime mover 1 in the hot water production apparatus, the three-way switching valve 11 is blocked at the pipes 12 and 9, and the pipe 9 is provided at the front and rear portions of the three-way switching valve 11. It has been switched to communicate. Thus, when the prime mover 1 is, for example, a gas engine, a mixed fluid of air and fuel gas is supplied into the piston of the prime mover 1, and the fuel explodes and burns in cooperation with oxygen. For this reason, the generator 2 is driven via the crankshaft to generate power. The prime mover exhaust gas Gh from the prime mover 1 is supplied to the waste heat boiler 3 to recover waste heat, and steam and the like are generated.
[0008]
The high-temperature cooling water W that has absorbed the prime mover waste heat and cooled the prime mover 1 by passing through the jacket 1a of the prime mover 1 is supplied to the waste heat recovery heat exchanger 4 via the pipe line 5 by the pump 7. Then, heat is exchanged with the feed water Ws introduced into the waste heat recovery heat exchanger 4 from the pipe line 8 to heat the feed water Ws to generate hot water Wh, which is returned to the jacket 1a through the pipe line 6, and again the prime mover The prime mover 1 is cooled by absorbing the waste heat and sent to the pipe 5. The generated warm water Wh is supplied from the pipe 9 to the hot water storage tank 10 and stored, and is used as appropriate.
[0009]
Further, when the water supply Ws is directly fed to the hot water storage tank 10, the downstream side of the connection part of the three-way switching valve 11 of the pipe line 12 and the pipe line 9 communicates, and the pipe line 9 is blocked by the front and rear parts of the three-way switching valve 11. Thus, the three-way switching valve 11 is switched. For this reason, the water supply Ws is supplied to the hot water tank 10 without passing through the waste heat recovery heat exchanger 4.
[0010]
Furthermore, in a cogeneration facility, there is an apparatus shown in Patent Document 1 as an apparatus for producing hot water by heating the feed water with prime mover waste heat during power generation to supply hot water. In Patent Document 1, a heat medium that absorbs waste heat generated by a prime mover such as a power generation engine during daytime power generation is fed from a pipe line to a heat exchanger to heat feed water. Hot water is supplied from the mouth.
[0011]
[Patent Document 1]
JP 2001-31708 A
[Problems to be solved by the invention]
In each of the hot water production apparatuses provided in the cogeneration facility, the prime mover waste heat can be used effectively during the daytime prime mover operating time period because the prime mover is operated and power is generated. However, since the prime mover is stopped outside the prime mover operating hours during the night, no prime mover waste heat is generated. Therefore, the temperature of the hot water drops, and the waste waste heat recovered during the day is wasted. This is disadvantageous in terms of energy saving and economy.
[0013]
In view of the above circumstances, an object of the present invention is to provide an energy-saving and economically advantageous hot water production apparatus installed in a cogeneration facility.
[0014]
[Means for Solving the Problems]
The hot water production apparatus according to claim 1 includes a first heat exchanger that heats a heat medium including a heat storage material with cooling water heated by waste heat of a prime mover, and heat heated by the first heat exchanger. A heat storage tank for storing and storing heat is provided, and a second heat exchanger for producing hot water by heating the water supply with the heat medium from the heat storage tank is provided.
[0015]
The hot water manufacturing apparatus according to claim 2 is provided with a hot water storage tank for storing hot water generated by the second heat exchanger.
[0016]
In the hot water production apparatus according to claim 3, the heat medium uses paraffin as a heat storage material, and the paraffin is dispersed as particles in water using a surfactant. In the hot water production apparatus according to claim 4, The prime mover is a gas engine.
[0017]
According to the present invention, the waste heat of the prime mover can be effectively used in the prime mover operating time zone during the daytime, and of course, outside the night prime mover working time zone, the heat storage tank stores heat via the heat medium during the prime mover working time zone. Therefore, it is possible to produce hot water using the generated waste heat from the prime mover. Therefore, it is possible to effectively utilize the waste heat from the prime mover stored during the daytime, improving the overall efficiency of the cogeneration facility and saving energy and economics. In addition, it can be effectively used by users who need hot water at night, such as hotels and hospitals.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an example of an embodiment for implementing a hot water production apparatus of the present invention applied to a cogeneration facility. In the illustrated example, in the daytime prime mover operating time zone, in addition to being able to produce the hot water Wh using the prime mover waste heat, the prime mover waste heat is recovered by the heat medium H having the heat storage material. Heat is stored, and the hot water Wh can be produced by the heat stored in the heat medium H outside the motor operating hours at night. In FIG. 1, the same reference numerals as those shown in FIG.
[0019]
In the figure, 13 is a pipe connected to the pipe 5 on the downstream side of the pump 7, 14 is a pipe connected to the pipe 6, 15 is a heat storage heat exchanger, and the pipes 13 and 14 are heat storages. It is connected to the industrial heat exchanger 15. Thus, a part of the high-temperature cooling water W that has absorbed the prime mover waste heat and cooled the prime mover 1 by flowing in the jacket 1a is fed from the pipes 5 and 13 to the heat storage heat exchanger 15. After heat is dissipated by the heat storage heat exchanger 15, the heat is returned to the jacket 1 a of the prime mover 1 from the pipelines 14 and 6, absorbs the prime mover waste heat, and is sent to the pipeline 5.
[0020]
16 is a heat storage tank, 17 is a heat dissipation heat exchanger, 18a and 18b are pipes connected in series via a three-way switching valve 19 so as to connect the heat storage heat exchanger 15 and the heat dissipation heat exchanger 17, 20a and 20b are pipes connected in series via a three-way switching valve 21 so as to connect the heat storage heat exchanger 15 and the heat radiation heat exchanger 17, 22 and 23 are heat storage tanks 16 and three-way switching valve 19, Reference numeral 24 denotes a pipe connected to the pipe 21. The heat medium H used for heat storage is a PCM (Phase Changed Material) emulsion in which paraffin, which is a heat storage material, is dispersed as fine particles in water using a surfactant, and melts even if the heat storage material solidifies. However, the fluidity of the heat medium H is maintained.
[0021]
Thus, when heat storage is performed in the operating hours of the prime mover 1 during the daytime (for example, 7:00 to 22:00), the heat medium H is supplied from the heat storage tank 16 to the pipeline 22, the three-way switching valve 19, by the pump 24. It is sent to the heat storage heat exchanger 15 through the pipe 18a, heated by exchanging heat with the high-temperature cooling water W, returned to the heat storage tank 16 through the pipe 20a, the three-way switching valve 21, and the pipe 23, Heat storage is performed. Further, outside the operating hours of the prime mover 1 at night, the heat medium H is supplied from the heat storage tank 16 to the heat radiating heat exchanger 17 through the pipe 22, the three-way switching valve 19, and the pipe 18b by the pump 24. Then, heat is exchanged with the water supply Ws to dissipate heat, and the heat is returned to the heat storage tank 16 through the pipe line 20b, the three-way switching valve 21, and the pipe line 23.
[0022]
Reference numeral 25 denotes a pipe connecting the pipe 9 and the heat-dissipating heat exchanger 17 on the downstream side of the three-way switching valve 11, reference numeral 26 denotes a pipe connecting the heat-radiating heat exchanger 17 and the hot water storage tank 10, and reference numeral 27 denotes a pipe 26. A three-way switching valve 28 provided in the middle part of the pipe is a pipe line connecting the middle part of the pipe 25 and the three-way switching valve 27.
[0023]
Thus, when the water supply Ws is heated by the waste heat recovery heat exchanger 4 during the daytime operating hours of the prime mover 1 and the hot water Wh is generated, the hot water Wh is connected to the pipelines 9 and 25. 28 is supplied to the hot water storage tank 10 through a portion upstream of the connecting portion, the pipe 28, the three-way switching valve 27, and a portion downstream of the three-way switching valve 27 connecting portion of the pipe 26. Yes. In addition, when it is outside the operating hours of the prime mover 1 at night, the water supply Ws introduced into the heat radiating heat exchanger 17 is supplied to the pipe line 9 and the pipe line 25. The hot water Wh from the heat exchanger 17 is supplied to the hot water storage tank 10 through the pipe line 26.
[0024]
Next, the operation of the above-described embodiment will be described.
In the operation time zone of the prime mover 1, the three-way switching valve 11 is switched so that the pipes 12 and 9 are blocked and the pipe 9 communicates with the front and rear portions of the three-way switching valve 11, and the three-way switching valve 27 is The portions of the conduit 28 and the conduit 26 downstream of the three-way switching valve 27 communicate with each other, and the conduit 26 is switched so as to be blocked at the front and rear portions of the three-way switching valve 27. The three-way switching valve 19 is switched so that the pipe lines 22 and 18a communicate with each other and the pipe lines 22 and 18b are blocked. The three-way switching valve 21 communicates with the pipe lines 20a and 23 with a pipe line. It is switched so that 20b and 23 are cut off.
[0025]
When the prime mover 1 is driven, the prime mover exhaust gas Gh from the prime mover 1 is supplied to the waste heat boiler 3 to recover waste heat, steam and the like are generated, and the high-temperature cooling water W that has passed through the jacket 1a of the prime mover 1 is generated. Is discharged by the pump 7, and a part thereof is supplied to the waste heat recovery heat exchanger 4 in the same manner as the apparatus of FIG. 3, and exchanges heat with the feed water Ws introduced into the waste heat recovery heat exchanger 4 from the pipe 8. Then, the hot water Wh is generated by heating the feed water Ws, returned to the jacket 1 a through the pipe line 6, absorbing the prime mover waste heat again, cooling the prime mover 1, and sending it to the pipe line 5. Hot water Wh from the waste heat recovery heat exchanger 4 is supplied to the hot water storage tank 10 through the pipe 9, the three-way switching valve 11, the pipe 9, the pipes 25 and 28, the three-way switching valve 27, and the pipe 26. Hot water is stored and used as appropriate.
[0026]
Further, a part of the high-temperature cooling water W discharged through the jacket 1a and discharged by the pump 7 is supplied to the heat storage heat exchanger 15 through the pipes 5 and 13, and is exchanged through the pipe 18a. The heat medium H introduced into the vessel 15 is heated by heat exchange, returned to the jacket 1a of the prime mover 1 via the pipelines 14 and 6, and again absorbs the prime mover waste heat and is sent to the pipeline 5.
[0027]
The heat medium H containing the heat storage material from the heat storage tank 16 is supplied by the pump 24 to the heat storage heat exchanger 15 via the pipe line 22, the three-way switching valve 19, and the pipe line 18 a. Heat is exchanged and heated, and is returned to the heat storage tank 16 through the pipe line 20a, the three-way switching valve 21, and the pipe line 23, and heat is stored.
[0028]
Outside the operating hours of the prime mover 1, the three-way switching valve 11 communicates with the downstream side of the pipe 12 and the three-way switching valve 11 of the pipe 9 and the front and rear portions of the three-way switching valve 11 of the pipe 9 are shut off. The three-way switching valve 27 is switched so that the pipe line 28 and the pipe line 26 are shut off and the front and rear portions of the three-way switching valve 27 of the pipe line 26 are communicated. The three-way switching valve 19 is switched so that the pipe line 22 and the pipe line 18b communicate with each other and the pipe line 22 and the pipe line 18a are blocked. The three-way switching valve 21 communicates with the pipe line 20b and the pipe line 23. However, the pipe 20a and the pipe 23 are switched so as to be blocked.
[0029]
Therefore, the heat medium H stored in the heat storage tank 16 is supplied by the pump 24 to the heat radiating heat exchanger 17 through the pipe line 22, the three-way switching valve 19, and the pipe line 18 b, and the pipe lines 8 and 12. The water supply Ws introduced into the heat radiating heat exchanger 17 from the three-way switching valve 11 and the pipes 9 and 25 is heated by heat exchange to generate hot water Wh, and the pipe 20b, the three-way switching valve 21 and the pipe 23 are connected. Then, it is returned to the heat storage tank 16. The hot water Wh generated in the heat radiating heat exchanger 17 passes through the pipe line 26, the three-way switching valve 27, and the pipe line 26, is supplied to the hot water storage tank 10, is stored, and is appropriately used.
[0030]
When it is not necessary to produce the hot water Wh by the heat-dissipating heat exchanger 17 outside the operating time zone of the prime mover 1, the three-way switching valve 11 remains in the above-described switching state outside the operating time zone of the prime mover 1, The switching valve 27 communicates with the downstream portion of the pipe line 28 and the three-way switching valve 27 of the pipe line 26 and blocks the upstream portion of the pipe line 28 and the pipe 26 with respect to the three-way switching valve 27. The three-way switching valve 27 is switched. For this reason, the water supply Ws from the pipe line 8 is fed to the hot water storage tank 10 without passing through the waste heat recovery heat exchanger 4 and the heat dissipation heat exchanger 17.
[0031]
FIG. 2 shows a temperature diagram of cooling water W, heat medium H, feed water Ws, and hot water supply Wh used in the hot water producing apparatus shown in FIG. In the figure, A is a temperature diagram of the cooling water W, B is a temperature diagram of the heat medium H, and C is a temperature diagram of the water supply Ws and the hot water supply Wh. In FIG. 2, T1 is the temperature at the inlet of the heat storage heat exchanger 15 for the cooling water W, T1≈80 ° C., T2 is the temperature at the outlet of the heat storage heat exchanger 15 for the cooling water W, and T2≈65 ° C. T3 is the temperature at the inlet of the heat storage heat exchanger 15 for the heat medium H or the temperature at the outlet of the heat exchanger 17 for heat dissipation of the heat medium H, T3≈60 ° C., T4 is the heat exchanger for heat storage of the heat medium H The temperature at the outlet 15 or the temperature at the inlet of the heat exchanger 17 for heat dissipation of the heat medium H, T4≈70 ° C. T5 is the temperature at the inlet of the heat exchanger 17 for heat dissipation of the feed water Ws, T5≈15 ° C., T6 is the temperature at the outlet of the heat exchanger 17 for heat dissipation of the hot water Wh, and T6≈60 ° C.
[0032]
According to the illustrated example of the present invention, the waste heat of the prime mover can be effectively used in the prime mover operating time zone, and of course, the heat storage is performed by the heat medium H during the prime mover operating time zone outside the night prime mover operating time zone. The hot water Wh can be manufactured using the prime mover waste heat stored in the tank 16. Accordingly, the waste heat of the prime mover stored during the prime mover operating time zone can be effectively utilized even outside the prime mover operating time zone, and the overall efficiency of the cogeneration facility is increased, which is advantageous in terms of energy saving and economy. In addition, these facilities can be effectively used especially for users who need hot water at night, such as hotels and hospitals.
[0033]
In the hot water production apparatus of the present invention, the case where a gas engine is used as a prime mover has been described. However, the present invention can also be implemented using an engine other than a gas engine and various turbines, and within the scope not departing from the gist of the present invention. Of course, various changes can be made.
[0034]
【The invention's effect】
As described above, according to the hot water production apparatus according to claims 1 to 4 of the present invention, the prime mover waste heat can be effectively used in the prime mover working time zone, and of course, the prime mover working time zone at night. Even outside, it is possible to produce hot water using prime mover waste heat that is stored in a heat storage tank by a heat medium during the prime mover operating hours, and therefore effectively use the prime mover waste heat that was stored during the daytime even at night. It is possible to improve the overall efficiency of cogeneration facilities, which is disadvantageous in terms of energy saving and economy, and can be effectively used especially in users who need hot water at night, such as hotels and hospitals. Can have an effect.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an example of an embodiment of a hot water production apparatus of the present invention applied to a cogeneration facility.
2 is a graph showing temperature diagrams of cooling water, heat medium, water supply, and hot water used in the hot water production apparatus of FIG. 1. FIG.
FIG. 3 is a flowchart showing an example of a conventional hot water production apparatus applied to a cogeneration facility.
[Explanation of symbols]
1 prime mover 10 hot water storage tank 15 heat storage heat exchanger (first heat exchanger)
16 Heat storage tank 17 Heat exchanger for heat dissipation (second heat exchanger)
H Heat medium W Cooling water (cooling fluid)
Ws Water supply Wh Hot water

Claims (4)

原動機の廃熱で加熱された冷却用流体により、蓄熱材を含む熱媒体を加熱する第一の熱交換器と、該第一の熱交換器で加熱された熱媒体を貯留して蓄熱する蓄熱槽と、該蓄熱槽からの熱媒体により給水を加熱して温水を生成させる第二の熱交換器を設けたことを特徴とする温水製造装置。A first heat exchanger that heats a heat medium including a heat storage material by a cooling fluid heated by waste heat of a prime mover, and a heat storage that stores and stores the heat medium heated by the first heat exchanger A hot water production apparatus comprising a tank and a second heat exchanger that heats feed water with a heat medium from the heat storage tank to generate hot water. 第二の熱交換器で生成された温水を貯湯するための貯湯槽を設けた請求項１記載の温水製造装置。The hot water production apparatus according to claim 1, further comprising a hot water storage tank for storing hot water generated by the second heat exchanger. 熱媒体は、蓄熱材としてパラフィンを用い、該パラフィンを界面活性剤を用いて水中に粒子として分散させたものである請求項１又は２記載の温水製造装置。The hot water production apparatus according to claim 1 or 2, wherein the heat medium uses paraffin as a heat storage material, and the paraffin is dispersed as particles in water using a surfactant. 原動機はガスエンジンである請求項１、２又は３記載の温水製造装置。The hot water production apparatus according to claim 1, 2, or 3, wherein the prime mover is a gas engine.
JP2003166224A 2003-06-11 2003-06-11 Hot water production equipment Pending JP2005003257A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012117790A (en) * 2010-12-03 2012-06-21 Japan Steel Works Ltd:The Exhaust heat recovery heat storage system
CN102721131A (en) * 2012-06-04 2012-10-10 广东申菱空调设备有限公司 Efficient and energy-saving hydropower air-conditioning cold-water and hot-water machine set

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012117790A (en) * 2010-12-03 2012-06-21 Japan Steel Works Ltd:The Exhaust heat recovery heat storage system
CN102721131A (en) * 2012-06-04 2012-10-10 广东申菱空调设备有限公司 Efficient and energy-saving hydropower air-conditioning cold-water and hot-water machine set

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