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WO2013136606A1 - Steam generating system - Google Patents

Steam generating system Download PDF

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Publication number
WO2013136606A1
WO2013136606A1 PCT/JP2012/081386 JP2012081386W WO2013136606A1 WO 2013136606 A1 WO2013136606 A1 WO 2013136606A1 JP 2012081386 W JP2012081386 W JP 2012081386W WO 2013136606 A1 WO2013136606 A1 WO 2013136606A1
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WIPO (PCT)
Prior art keywords
heat
primary
evaporator
generation system
refrigerant
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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.)
Ceased
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PCT/JP2012/081386
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French (fr)
Japanese (ja)
Inventor
洋志 東
南　健一
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Yanmar Co Ltd
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Yanmar Co Ltd
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Publication of WO2013136606A1 publication Critical patent/WO2013136606A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Definitions

  • the present invention relates to a steam generation system that generates steam using a first heat medium as a heat source.
  • Patent Document 1 discloses a steam generator 1 that generates steam by performing two-stage heat transfer via two heat pumps.
  • the steam generator 1 is a heat source fluid, for example, a first heat pump 2 that absorbs heat from hot water at 55 ° C. and dissipates heat to the intermediate fluid (water), and absorbs heat from the intermediate fluid, dissipates heat to 20 ° C. water and 120 ° C.
  • a second heat pump 3 that generates steam by heating up to.
  • the present invention provides a steam generation system capable of generating steam that meets the demand while suppressing the amount of heat received from the first heat medium to a small amount.
  • a steam generation system is a steam generation system that generates steam using a first heat medium as a heat source, and is a primary heat pump in which a primary refrigerant is circulated, and the first heat medium to the first heat pump.
  • a primary heat pump having a primary evaporator for transferring heat to a secondary refrigerant, and a secondary heat pump in which a secondary refrigerant circulates, wherein the heat is transferred from the primary refrigerant to the secondary refrigerant.
  • exhaust heat is supplied to the second heat medium.
  • the secondary heat pump is further provided with a second evaporator that moves the amount of heat from the second heat medium to the secondary refrigerant.
  • the first evaporator and the second evaporator are arranged in series.
  • the first evaporator and the second evaporator are arranged in parallel.
  • the primary heat pump includes a primary compressor that flows the primary refrigerant
  • the secondary heat pump includes a secondary compressor that flows the secondary refrigerant, and the engine. Drives the primary compressor and the secondary compressor.
  • the steam generation system can generate steam commensurate with the demand while suppressing the amount of heat received from the first heat medium to a small amount.
  • FIG. 1 is a diagram showing a configuration of a steam generation system.
  • the steam generation system includes a primary heat pump 1, a secondary heat pump 2, and an engine 3.
  • the steam generation system also includes a first hot water path 4, a second hot water path 5, a pump 6, a water supply path 7, and a steam output path 8.
  • the primary heat pump 1 includes a primary path 10, a primary compressor 11, a primary condenser and a primary evaporator 24, which is an evaporator of the secondary heat pump 2, a primary expansion valve 12, and a primary evaporator 13. It has.
  • the primary compressor 11 causes the primary refrigerant to flow along the primary path 10.
  • the flow direction D1 indicates the direction in which the primary refrigerant flows.
  • the primary refrigerant circulates through the primary path 10 and sequentially passes through the first evaporator 24, the primary expansion valve 12, the primary evaporator 13, and the primary compressor 11.
  • the secondary heat pump 2 includes a secondary path 20, a secondary compressor 21, a secondary condenser 22, a secondary expansion valve 23, a first evaporator 24, and a second evaporator 25.
  • the secondary compressor 21 causes the secondary refrigerant to flow along the secondary path 20.
  • a flow direction D2 indicates a direction in which the secondary refrigerant flows.
  • the secondary refrigerant circulates in the secondary path 20 and sequentially passes through the secondary condenser 22, the secondary expansion valve 23, the first evaporator 24, the second evaporator 25, and the secondary compressor 21.
  • the first hot water path 4 is provided so as to pass through the primary evaporator 13 of the primary heat pump 1.
  • the first warm water flows along the first warm water path 4.
  • the flow direction D4 indicates the direction in which the first hot water flows.
  • the first hot water is one of heat sources that generate steam.
  • the second hot water path 5 is provided so as to pass through the engine 3 and the second evaporator 25 of the secondary heat pump 2.
  • the pump 6 causes the second warm water to flow along the second warm water path 5.
  • a flow direction D5 indicates a direction in which the second hot water flows.
  • the second hot water circulates along the second hot water path 5 and sequentially passes through the engine 3 and the second evaporator 25.
  • the second hot water is cooling water for the engine 3 and is one of heat sources that generate steam.
  • the water supply path 7 is provided so as to pass through the secondary condenser 22 of the secondary heat pump 2.
  • the flow direction D7 indicates the direction in which water flows.
  • the steam output path 8 is a path on the outlet side of the water supply path 7 and is a path for supplying steam generated by the secondary condenser 22 to a steam utilization end (not shown).
  • the flow direction D8 indicates the direction in which the steam flows.
  • the steam generation system is installed in a factory, for example.
  • the steam generated by the steam generation system is used in this factory.
  • the first hot water is a heat medium (first heat medium) that conveys exhaust heat discharged from the drive source or heat source used in this factory.
  • the temperature of 1st warm water is 70 degreeC, for example.
  • the engine 3 may be one of the drive sources used in this factory.
  • the second hot water is the cooling water for the engine 3 and is a heat medium (second heat medium) that conveys the exhaust heat discharged from the engine 3.
  • the temperature of the second warm water is, for example, 96 ° C. That is, the temperature of the first warm water is lower than the temperature of the second warm water.
  • the steam generation system generates steam by evaporating water through the primary heat pump 1 and the secondary heat pump 2 using the first warm water and the second warm water as heat sources.
  • the primary refrigerant flows along the primary path 10
  • the secondary refrigerant flows along the secondary path 20
  • the first hot water flows along the first hot water path 4.
  • the second hot water is flowed along the second hot water path 5, and the water is flowed along the water supply path 7.
  • the primary evaporator 13 of the primary heat pump 1 moves the amount of heat from the first hot water in the first hot water path 4 to the primary refrigerant.
  • the primary refrigerant is vaporized and the temperature of the first hot water is lowered.
  • the amount of temperature decrease is, for example, about 5 ° C.
  • the first evaporator 24 of the secondary heat pump 2 moves the amount of heat from the primary refrigerant to the secondary refrigerant.
  • the first evaporator 24 functions as an evaporator in the secondary heat pump 2, but functions as a condenser in the primary heat pump 1.
  • the primary refrigerant is liquefied and the secondary refrigerant is vaporized.
  • the second evaporator 25 of the secondary heat pump 2 moves the amount of heat from the second hot water in the second hot water path 5 to the secondary refrigerant.
  • the secondary refrigerant is vaporized or superheated, and the temperature of the second hot water decreases.
  • the secondary condenser 22 of the secondary heat pump 2 moves the amount of heat from the secondary refrigerant to the water in the water supply path 7.
  • the secondary refrigerant is liquefied, water is evaporated, and steam is generated.
  • the temperature of the generated steam is, for example, about 130 ° C.
  • FIG. 2 is a diagram showing the configuration of the steam generation system.
  • the first evaporator 24 and the second evaporator 25 according to the second embodiment are arranged in parallel.
  • the secondary path 20 includes a first path 201 and a second path 202 between the secondary expansion valve 23 and the secondary compressor 21.
  • the first path 201 and the second path 202 are arranged in parallel.
  • the first path 201 and the second path 202 branch at the branch position 20a and merge at the merge position 20b.
  • the first evaporator 24 and the second evaporator 25 according to the first embodiment are arranged in series.
  • the operation of the steam generation system according to the second embodiment is substantially equal to the operation of the steam generation system according to the first embodiment.
  • Some secondary refrigerants receive heat from the first hot water via the primary refrigerant in the first evaporator 24, and the remaining secondary refrigerants receive heat from the second hot water in the second evaporator 25.
  • the secondary refrigerant merges downstream of the merge position 20b, and the degree of superheat of the secondary refrigerant is made uniform.
  • FIG. 3 is a diagram showing the configuration of the steam generation system.
  • the steam generation system according to the third embodiment includes a transmission mechanism 30 that transmits the output of the engine 3 to the primary compressor 11 and the secondary compressor 21.
  • the engine 3 according to the third embodiment drives the primary compressor 11 and the secondary compressor 21.
  • the drive source of the primary compressor 11 and the secondary compressor 21 is not limited to the engine 3 and may be a motor, for example.
  • the steam generation system includes the primary heat pump 1, the secondary heat pump 2, and the engine 3 that supplies exhaust heat to the second heat medium (second hot water).
  • the exhaust heat of the engine 3 is used as one of heat sources that generate steam.
  • the steam generation system according to the first to third embodiments can generate steam commensurate with the demand amount while suppressing the amount of heat received from the first heat medium (first hot water) to a small amount.
  • the first evaporator 24 and the second evaporator 25 are arranged in series.
  • the whole amount of the secondary refrigerant is heated by the first heat medium and the second heat medium (exhaust heat of the engine 3).
  • the first evaporator 24 and the second evaporator 25 are arranged in parallel.
  • Some of the secondary refrigerants are heated by the first heat medium, and the remaining secondary refrigerants are heated by the second heat medium (exhaust heat of the engine 3).
  • the engine 3 drives the primary compressor 11 and the secondary compressor 21.
  • the steam generation system according to the third embodiment can improve the energy efficiency required for generating steam as compared with the case where the exhaust heat of the drive source of the primary compressor 11 and the secondary compressor 21 is not used.
  • the cooling water of the engine 3 is used as the second heat medium, but the exhaust gas of the engine 3 may be used as the second heat medium.
  • the heat source of the second evaporator 25 not only exhaust heat of the engine 3 but also exhaust heat of a combustion facility or a chemical reaction facility may be used. In short, the exhaust heat that is higher than the heat source of the primary evaporator 13 may be used as the heat source of the second evaporator 25.
  • the primary evaporator 13, the first evaporator 24, the second evaporator 25, and the secondary condenser 22 are illustrated with a structure in which a high-temperature fluid and a low-temperature fluid face each other.
  • a parallel flow structure or other structures may be used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Description

蒸気発生システムSteam generation system

　本発明は、第１熱媒体を熱源として蒸気を発生させる蒸気発生システムに関する。 The present invention relates to a steam generation system that generates steam using a first heat medium as a heat source.

　特許文献１は、２つのヒートポンプを介して２段階の熱の移動を行うことによって、蒸気を発生させる蒸気発生装置１を開示している。蒸気発生装置１は、熱源流体となる例えば、５５℃の温水から吸熱し、中間流体（水）に放熱する第１ヒートポンプ２と、中間流体から吸熱し、２０℃の給水に放熱して１２０℃まで加熱して蒸気を発生させる第２ヒートポンプ３とを有する。 Patent Document 1 discloses a steam generator 1 that generates steam by performing two-stage heat transfer via two heat pumps. The steam generator 1 is a heat source fluid, for example, a first heat pump 2 that absorbs heat from hot water at 55 ° C. and dissipates heat to the intermediate fluid (water), and absorbs heat from the intermediate fluid, dissipates heat to 20 ° C. water and 120 ° C. And a second heat pump 3 that generates steam by heating up to.

特開２０１０－１６４２５８号公報JP 2010-164258 A

　しかし、５５℃程度の温水（第１熱媒体）から高温蒸気（例えば、１２０℃）を得るには、必要熱量を確保する都合上、多量の温水が必要になる。そのため、工場等で排出される温水を熱源として利用する場合、需要量に見合う蒸気を発生させるための温水の水量が不足するという問題があった。 However, in order to obtain high-temperature steam (for example, 120 ° C.) from hot water (first heat medium) of about 55 ° C., a large amount of hot water is required for the purpose of securing the necessary heat quantity. Therefore, when using the warm water discharged | emitted in a factory etc. as a heat source, there existed a problem that the amount of warm water for generating the steam corresponding to a demand amount was insufficient.

　そこで本発明は、第１熱媒体から受ける熱量を少量に抑えながら需要量に見合う蒸気を発生できる蒸気発生システムを提供する。 Therefore, the present invention provides a steam generation system capable of generating steam that meets the demand while suppressing the amount of heat received from the first heat medium to a small amount.

　本発明に係る蒸気発生システムは、第１熱媒体を熱源として蒸気を発生させる蒸気発生システムであって、１次冷媒が循環している１次ヒートポンプであって、前記第１熱媒体から前記１次冷媒に熱量を移動させる１次蒸発器を備えている１次ヒートポンプと、２次冷媒が循環している２次ヒートポンプであって、前記１次冷媒から前記２次冷媒に熱量を移動させる第１蒸発器、及び前記２次冷媒から熱量を移動させて蒸気を発生させる２次凝縮器を備えている２次ヒートポンプと、を備えている蒸気発生システムにおいて、第２熱媒体に排熱を供給するエンジンを備えており、前記２次ヒートポンプは、前記第２熱媒体から前記２次冷媒に熱量を移動させる第２蒸発器を更に備えている、ことを特徴とする。 A steam generation system according to the present invention is a steam generation system that generates steam using a first heat medium as a heat source, and is a primary heat pump in which a primary refrigerant is circulated, and the first heat medium to the first heat pump. A primary heat pump having a primary evaporator for transferring heat to a secondary refrigerant, and a secondary heat pump in which a secondary refrigerant circulates, wherein the heat is transferred from the primary refrigerant to the secondary refrigerant. In a steam generation system including a first evaporator and a secondary heat pump including a secondary condenser that generates steam by moving the amount of heat from the secondary refrigerant, exhaust heat is supplied to the second heat medium. The secondary heat pump is further provided with a second evaporator that moves the amount of heat from the second heat medium to the secondary refrigerant.

　前記蒸気発生システムにおいて、前記第１蒸発器及び前記第２蒸発器は、直列に配置されている。 In the steam generation system, the first evaporator and the second evaporator are arranged in series.

　前記蒸気発生システムにおいて、前記第１蒸発器及び前記第２蒸発器は、並列に配置されている。 In the steam generation system, the first evaporator and the second evaporator are arranged in parallel.

　前記蒸気発生システムにおいて、前記１次ヒートポンプは、前記１次冷媒を流す１次圧縮機を備えており、前記２次ヒートポンプは、前記２次冷媒を流す２次圧縮機を備えており、前記エンジンは、前記１次圧縮機及び前記２次圧縮機を駆動する。 In the steam generation system, the primary heat pump includes a primary compressor that flows the primary refrigerant, and the secondary heat pump includes a secondary compressor that flows the secondary refrigerant, and the engine. Drives the primary compressor and the secondary compressor.

　本発明に係る蒸気発生システムは、第１熱媒体から受ける熱量を少量に抑えながら需要量に見合う蒸気を発生できる。 The steam generation system according to the present invention can generate steam commensurate with the demand while suppressing the amount of heat received from the first heat medium to a small amount.

第１実施形態の蒸気発生システムの構成を示す図である。It is a figure which shows the structure of the steam generation system of 1st Embodiment. 第２実施形態の蒸気発生システムの構成を示す図である。It is a figure which shows the structure of the steam generation system of 2nd Embodiment. 第３実施形態の蒸気発生システムの構成を示す図である。It is a figure which shows the structure of the steam generation system of 3rd Embodiment.

（第１実施形態の構成）
　図１を参照して、第１実施形態に係る蒸気発生システムを説明する。 (Configuration of the first embodiment)
With reference to FIG. 1, the steam generation system which concerns on 1st Embodiment is demonstrated.

　図１は、蒸気発生システムの構成を示す図である。図１において、蒸気発生システムは、１次ヒートポンプ１、２次ヒートポンプ２、及びエンジン３を備えている。また、蒸気発生システムは、第１温水経路４、第２温水経路５、ポンプ６、給水経路７、蒸気出力経路８を備えている。 FIG. 1 is a diagram showing a configuration of a steam generation system. In FIG. 1, the steam generation system includes a primary heat pump 1, a secondary heat pump 2, and an engine 3. The steam generation system also includes a first hot water path 4, a second hot water path 5, a pump 6, a water supply path 7, and a steam output path 8.

　蒸気発生システムの構成をより詳しく説明する。１次ヒートポンプ１は、１次経路１０、１次圧縮機１１、１次凝縮器であり２次ヒートポンプ２の蒸発器である第１蒸発器２４、１次膨張弁１２、及び１次蒸発器１３を備えている。１次圧縮機１１は、１次冷媒を１次経路１０に沿って流す。流れ方向Ｄ１は、１次冷媒の流れる方向を示している。１次冷媒は、１次経路１０を循環し、第１蒸発器２４、１次膨張弁１２、１次蒸発器１３、及び１次圧縮機１１を順に通過する。２次ヒートポンプ２は、２次経路２０、２次圧縮機２１、２次凝縮器２２、２次膨張弁２３、第１蒸発器２４、及び第２蒸発器２５を備えている。２次圧縮機２１は、２次冷媒を２次経路２０に沿って流す。流れ方向Ｄ２は、２次冷媒の流れる方向を示している。２次冷媒は２次経路２０を循環し、２次凝縮器２２、２次膨張弁２３、第１蒸発器２４、第２蒸発器２５、及び２次圧縮機２１を順に通過する。 The configuration of the steam generation system will be described in more detail. The primary heat pump 1 includes a primary path 10, a primary compressor 11, a primary condenser and a primary evaporator 24, which is an evaporator of the secondary heat pump 2, a primary expansion valve 12, and a primary evaporator 13. It has. The primary compressor 11 causes the primary refrigerant to flow along the primary path 10. The flow direction D1 indicates the direction in which the primary refrigerant flows. The primary refrigerant circulates through the primary path 10 and sequentially passes through the first evaporator 24, the primary expansion valve 12, the primary evaporator 13, and the primary compressor 11. The secondary heat pump 2 includes a secondary path 20, a secondary compressor 21, a secondary condenser 22, a secondary expansion valve 23, a first evaporator 24, and a second evaporator 25. The secondary compressor 21 causes the secondary refrigerant to flow along the secondary path 20. A flow direction D2 indicates a direction in which the secondary refrigerant flows. The secondary refrigerant circulates in the secondary path 20 and sequentially passes through the secondary condenser 22, the secondary expansion valve 23, the first evaporator 24, the second evaporator 25, and the secondary compressor 21.

　第１温水経路４は、１次ヒートポンプ１の１次蒸発器１３を通過するように設けられている。第１温水は、第１温水経路４に沿って流される。流れ方向Ｄ４は、第１温水の流れる方向を示している。該第１温水は、蒸気を発生させる熱源の１つである。第２温水経路５は、エンジン３及び２次ヒートポンプ２の第２蒸発器２５を通過するように設けられている。ポンプ６は、第２温水を第２温水経路５に沿って流す。流れ方向Ｄ５は、第２温水の流れる方向を示している。第２温水は、第２温水経路５に沿って循環し、エンジン３及び第２蒸発器２５を順に通過する。第２温水は、エンジン３の冷却水であり、蒸気を発生させる熱源の１つである。給水経路７は、２次ヒートポンプ２の２次凝縮器２２を通過するように設けられている。流れ方向Ｄ７は、水の流れる方向を示している。蒸気出力経路８は、給水経路７の出口側の経路であり、２次凝縮器２２で発生した蒸気を図示しない蒸気利用端へ供給する経路である。流れ方向Ｄ８は、蒸気の流れる方向を示している。 The first hot water path 4 is provided so as to pass through the primary evaporator 13 of the primary heat pump 1. The first warm water flows along the first warm water path 4. The flow direction D4 indicates the direction in which the first hot water flows. The first hot water is one of heat sources that generate steam. The second hot water path 5 is provided so as to pass through the engine 3 and the second evaporator 25 of the secondary heat pump 2. The pump 6 causes the second warm water to flow along the second warm water path 5. A flow direction D5 indicates a direction in which the second hot water flows. The second hot water circulates along the second hot water path 5 and sequentially passes through the engine 3 and the second evaporator 25. The second hot water is cooling water for the engine 3 and is one of heat sources that generate steam. The water supply path 7 is provided so as to pass through the secondary condenser 22 of the secondary heat pump 2. The flow direction D7 indicates the direction in which water flows. The steam output path 8 is a path on the outlet side of the water supply path 7 and is a path for supplying steam generated by the secondary condenser 22 to a steam utilization end (not shown). The flow direction D8 indicates the direction in which the steam flows.

　蒸気発生システムは、例えば工場に設置されている。蒸気発生システムが発生させる蒸気は、この工場において利用される。第１温水は、この工場で使用される駆動源又は熱源から排出される排熱を搬送する熱媒体（第１熱媒体）である。第１温水の温度は、例えば７０℃である。エンジン３は、この工場で使用される駆動源の１つであってもよい。第２温水は、上述したように、エンジン３の冷却水であり、エンジン３から排出される排熱を搬送する熱媒体（第２熱媒体）である。第２温水の温度は、例えば９６℃である。つまり、第１温水の温度は、第２温水の温度よりも低い。 The steam generation system is installed in a factory, for example. The steam generated by the steam generation system is used in this factory. The first hot water is a heat medium (first heat medium) that conveys exhaust heat discharged from the drive source or heat source used in this factory. The temperature of 1st warm water is 70 degreeC, for example. The engine 3 may be one of the drive sources used in this factory. As described above, the second hot water is the cooling water for the engine 3 and is a heat medium (second heat medium) that conveys the exhaust heat discharged from the engine 3. The temperature of the second warm water is, for example, 96 ° C. That is, the temperature of the first warm water is lower than the temperature of the second warm water.

　蒸気発生システムの作用を説明する。概略的に説明すると、蒸気発生システムは、第１温水及び第２温水を熱源として１次ヒートポンプ１及び２次ヒートポンプ２を介して水を蒸発させることにより、蒸気を発生させる。蒸気発生システムが駆動されているとき、１次冷媒が１次経路１０に沿って流され、２次冷媒が２次経路２０に沿って流され、第１温水が第１温水経路４に沿って流され、第２温水が第２温水経路５に沿って流され、水が給水経路７に沿って流されている。以下、より詳しく作用を説明する。 Explain the operation of the steam generation system. Briefly described, the steam generation system generates steam by evaporating water through the primary heat pump 1 and the secondary heat pump 2 using the first warm water and the second warm water as heat sources. When the steam generation system is driven, the primary refrigerant flows along the primary path 10, the secondary refrigerant flows along the secondary path 20, and the first hot water flows along the first hot water path 4. The second hot water is flowed along the second hot water path 5, and the water is flowed along the water supply path 7. Hereinafter, the operation will be described in more detail.

　１次ヒートポンプ１の１次蒸発器１３は、第１温水経路４の第１温水から熱量を１次冷媒に移動させる。１次蒸発器１３において、１次冷媒は気化し、第１温水の温度が低下する。温度の低下量は、例えば５℃程度である。 The primary evaporator 13 of the primary heat pump 1 moves the amount of heat from the first hot water in the first hot water path 4 to the primary refrigerant. In the primary evaporator 13, the primary refrigerant is vaporized and the temperature of the first hot water is lowered. The amount of temperature decrease is, for example, about 5 ° C.

　２次ヒートポンプ２の第１蒸発器２４は、１次冷媒から２次冷媒に熱量を移動させる。第１蒸発器２４は、２次ヒートポンプ２において蒸発器として機能するが、１次ヒートポンプ１において凝縮器として機能する。第１蒸発器２４において、１次冷媒は液化し、２次冷媒は気化する。 The first evaporator 24 of the secondary heat pump 2 moves the amount of heat from the primary refrigerant to the secondary refrigerant. The first evaporator 24 functions as an evaporator in the secondary heat pump 2, but functions as a condenser in the primary heat pump 1. In the first evaporator 24, the primary refrigerant is liquefied and the secondary refrigerant is vaporized.

　２次ヒートポンプ２の第２蒸発器２５は、第２温水経路５の第２温水から２次冷媒に熱量を移動させる。２次凝縮器２５において、２次冷媒は気化又は過熱され、第２温水の温度が低下する。 The second evaporator 25 of the secondary heat pump 2 moves the amount of heat from the second hot water in the second hot water path 5 to the secondary refrigerant. In the secondary condenser 25, the secondary refrigerant is vaporized or superheated, and the temperature of the second hot water decreases.

　２次ヒートポンプ２の２次凝縮器２２は、２次冷媒から給水経路７の水に熱量を移動させる。２次凝縮器２２において、２次冷媒は液化し、水が蒸発して蒸気が発生する。発生する蒸気の温度は、例えば１３０℃程度である。 The secondary condenser 22 of the secondary heat pump 2 moves the amount of heat from the secondary refrigerant to the water in the water supply path 7. In the secondary condenser 22, the secondary refrigerant is liquefied, water is evaporated, and steam is generated. The temperature of the generated steam is, for example, about 130 ° C.

（第２実施形態の構成）
　図２を参照して、第２実施形態に係る蒸気発生システムを説明する。第１蒸発器２４及び第２蒸発器２５の配置が、第１実施形態と第２実施形態との間で変更されている。他の点は、第１実施形態と第２実施形態との間で同一である。 (Configuration of Second Embodiment)
With reference to FIG. 2, the steam generation system which concerns on 2nd Embodiment is demonstrated. The arrangement of the first evaporator 24 and the second evaporator 25 is changed between the first embodiment and the second embodiment. Other points are the same between the first embodiment and the second embodiment.

　図２は、蒸気発生システムの構成を示す図である。第２実施形態に係る第１蒸発器２４及び第２蒸発器２５は、並列に配置されている。２次経路２０は、２次膨張弁２３と２次圧縮機２１との間に、第１経路２０１及び第２経路２０２を備えている。第１経路２０１及び第２経路２０２は並列に配置されている。第１経路２０１及び第２経路２０２は、分岐位置２０ａで分岐し、合流位置２０ｂで合流する。一方、第１実施形態に係る第１蒸発器２４及び第２蒸発器２５は、直列に配置されている。 FIG. 2 is a diagram showing the configuration of the steam generation system. The first evaporator 24 and the second evaporator 25 according to the second embodiment are arranged in parallel. The secondary path 20 includes a first path 201 and a second path 202 between the secondary expansion valve 23 and the secondary compressor 21. The first path 201 and the second path 202 are arranged in parallel. The first path 201 and the second path 202 branch at the branch position 20a and merge at the merge position 20b. On the other hand, the first evaporator 24 and the second evaporator 25 according to the first embodiment are arranged in series.

　第２実施形態に係る蒸気発生システムの作用は、概ね第１実施形態に係る蒸気発生システムの作用に等しい。一部の２次冷媒は第１蒸発器２４において１次冷媒を介して第１温水から熱量を受け取り、残りの２次冷媒は第２蒸発器２５において第２温水から熱量を受け取る。合流位置２０ｂの下流において、２次冷媒は合流し、２次冷媒の過熱度が均一化される。 The operation of the steam generation system according to the second embodiment is substantially equal to the operation of the steam generation system according to the first embodiment. Some secondary refrigerants receive heat from the first hot water via the primary refrigerant in the first evaporator 24, and the remaining secondary refrigerants receive heat from the second hot water in the second evaporator 25. The secondary refrigerant merges downstream of the merge position 20b, and the degree of superheat of the secondary refrigerant is made uniform.

（第３実施形態の構成）
　図３を参照して、第３実施形態に係る蒸気発生システムを説明する。１次圧縮機１１及び２次圧縮機２１の駆動源が、第１実施形態と第３実施形態との間で変更されている。他の点は、第１実施形態と第３実施形態との間で同一である。 (Configuration of Third Embodiment)
With reference to FIG. 3, the steam generation system which concerns on 3rd Embodiment is demonstrated. The drive source of the primary compressor 11 and the secondary compressor 21 is changed between 1st Embodiment and 3rd Embodiment. Other points are the same between the first embodiment and the third embodiment.

　図３は、蒸気発生システムの構成を示す図である。第３実施形態に係る蒸気発生システムは、エンジン３の出力を１次圧縮機１１及び２次圧縮機２１に伝達する伝達機構３０を備えている。第３実施形態に係るエンジン３は、１次圧縮機１１及び２次圧縮機２１を駆動する。一方、第１実施形態又は第２実施形態では、１次圧縮機１１及び２次圧縮機２１の駆動源は、エンジン３に限られず、例えばモータでも良い。 FIG. 3 is a diagram showing the configuration of the steam generation system. The steam generation system according to the third embodiment includes a transmission mechanism 30 that transmits the output of the engine 3 to the primary compressor 11 and the secondary compressor 21. The engine 3 according to the third embodiment drives the primary compressor 11 and the secondary compressor 21. On the other hand, in the first embodiment or the second embodiment, the drive source of the primary compressor 11 and the secondary compressor 21 is not limited to the engine 3 and may be a motor, for example.

（本実施形態の効果）
　本実施形態に係る蒸気発生システムは、上述した次の構成により、次の効果を有する。 (Effect of this embodiment)
The steam generation system according to the present embodiment has the following effects by the following configuration described above.

（１）第１－３実施形態に係る蒸気発生システムは、１次ヒートポンプ１、２次ヒートポンプ２、及び第２熱媒体（第２温水）に排熱を供給するエンジン３を備えている。 (1) The steam generation system according to the first to third embodiments includes the primary heat pump 1, the secondary heat pump 2, and the engine 3 that supplies exhaust heat to the second heat medium (second hot water).

　エンジン３の排熱が、蒸気を発生させる熱源の１つとして利用される。このため、第１－３実施形態に係る蒸気発生システムは、第１熱媒体（第１温水）から受ける熱量を少量に抑えながら需要量に見合う蒸気を発生できる。 The exhaust heat of the engine 3 is used as one of heat sources that generate steam. For this reason, the steam generation system according to the first to third embodiments can generate steam commensurate with the demand amount while suppressing the amount of heat received from the first heat medium (first hot water) to a small amount.

（２）第１、３実施形態に係る蒸気発生システムでは、第１蒸発器２４及び第２蒸発器２５は、直列に配置されている。 (2) In the steam generation system according to the first and third embodiments, the first evaporator 24 and the second evaporator 25 are arranged in series.

　２次冷媒の全量が、第１熱媒体及び第２熱媒体（エンジン３の排熱）によって加熱される。 The whole amount of the secondary refrigerant is heated by the first heat medium and the second heat medium (exhaust heat of the engine 3).

（３）第２実施形態に係る蒸気発生システムでは、第１蒸発器２４及び第２蒸発器２５は、並列に配置されている。 (3) In the steam generation system according to the second embodiment, the first evaporator 24 and the second evaporator 25 are arranged in parallel.

　一部の２次冷媒は第１熱媒体によって加熱され、残りの２次冷媒は第２熱媒体（エンジン３の排熱）によって加熱される。 Some of the secondary refrigerants are heated by the first heat medium, and the remaining secondary refrigerants are heated by the second heat medium (exhaust heat of the engine 3).

（４）第３実施形態に係る蒸気発生システムでは、エンジン３は、１次圧縮機１１及び２次圧縮機２１を駆動する。 (4) In the steam generation system according to the third embodiment, the engine 3 drives the primary compressor 11 and the secondary compressor 21.

　第３実施形態に係る蒸気発生システムは、１次圧縮機１１及び２次圧縮機２１の駆動源の排熱が利用されない場合と比べて、蒸気の発生に要するエネルギー効率を向上できる。 The steam generation system according to the third embodiment can improve the energy efficiency required for generating steam as compared with the case where the exhaust heat of the drive source of the primary compressor 11 and the secondary compressor 21 is not used.

　なお、第１実施形態～第３実施形態では、エンジン３の冷却水を第２熱媒体としたが、エンジン３の排気ガスを第２熱媒体としても良い。さらに、第２蒸発器２５の熱源としてエンジン３の排熱だけでなく燃焼設備や化学反応設備等の排熱を利用しても良い。要は、１次蒸発器１３の熱源よりも高温の排熱を第２蒸発器２５の熱源とすれば良い。 In the first to third embodiments, the cooling water of the engine 3 is used as the second heat medium, but the exhaust gas of the engine 3 may be used as the second heat medium. Further, as the heat source of the second evaporator 25, not only exhaust heat of the engine 3 but also exhaust heat of a combustion facility or a chemical reaction facility may be used. In short, the exhaust heat that is higher than the heat source of the primary evaporator 13 may be used as the heat source of the second evaporator 25.

　また、第１実施形態～第３実施形態では、１次蒸発器１３、第１蒸発器２４、第２蒸発器２５および２次凝縮器２２を高温流体と低温流体が対向する構造を図示したが、対向流構造だけでなく、並行流構造でもその他の構造でも良い。 In the first to third embodiments, the primary evaporator 13, the first evaporator 24, the second evaporator 25, and the secondary condenser 22 are illustrated with a structure in which a high-temperature fluid and a low-temperature fluid face each other. In addition to the counterflow structure, a parallel flow structure or other structures may be used.

　　１　１次ヒートポンプ
　　２　２次ヒートポンプ
　　３　エンジン
　１３　１次蒸発器
　２２　２次凝縮器
　２４　第１蒸発器
　２５　第２蒸発器 DESCRIPTION OF SYMBOLS 1 Primary heat pump 2 Secondary heat pump 3 Engine 13 Primary evaporator 22 Secondary condenser 24 1st evaporator 25 2nd evaporator

Claims (4)

　第１熱媒体を熱源として蒸気を発生させる蒸気発生システムであって、
　１次冷媒が循環している１次ヒートポンプであって、前記第１熱媒体から前記１次冷媒に熱量を移動させる１次蒸発器を備えている１次ヒートポンプと、
　２次冷媒が循環している２次ヒートポンプであって、前記１次冷媒から前記２次冷媒に熱量を移動させる第１蒸発器、及び前記２次冷媒から熱量を移動させて蒸気を発生させる２次凝縮器を備えている２次ヒートポンプと、を備えている蒸気発生システムにおいて、
　第２熱媒体に排熱を供給するエンジンを備えており、
　前記２次ヒートポンプは、前記第２熱媒体から前記２次冷媒に熱量を移動させる第２蒸発器を更に備えている、ことを特徴とする蒸気発生システム。 A steam generation system that generates steam using a first heat medium as a heat source,
A primary heat pump in which a primary refrigerant is circulated, the primary heat pump comprising a primary evaporator that moves heat from the first heat medium to the primary refrigerant;
A secondary heat pump in which a secondary refrigerant circulates, wherein the first evaporator moves heat from the primary refrigerant to the secondary refrigerant, and generates heat by moving heat from the secondary refrigerant; A steam generation system comprising a secondary heat pump comprising a secondary condenser;
An engine for supplying exhaust heat to the second heat medium;
The said secondary heat pump is further equipped with the 2nd evaporator which transfers the amount of heat from the said 2nd heat medium to the said secondary refrigerant | coolant, The steam generation system characterized by the above-mentioned. 　前記第１蒸発器及び前記第２蒸発器は、直列に配置されている、請求項１に記載の蒸気発生システム。 The steam generation system according to claim 1, wherein the first evaporator and the second evaporator are arranged in series. 　前記第１蒸発器及び前記第２蒸発器は、並列に配置されている、請求項１に記載の蒸気発生システム。 The steam generation system according to claim 1, wherein the first evaporator and the second evaporator are arranged in parallel. 　前記１次ヒートポンプは、前記１次冷媒を流す１次圧縮機を備えており、
　前記２次ヒートポンプは、前記２次冷媒を流す２次圧縮機を備えており、
　前記エンジンは、前記１次圧縮機及び前記２次圧縮機を駆動する、請求項１－３のいずれか１つに記載の蒸気発生システム。 The primary heat pump includes a primary compressor for flowing the primary refrigerant,
The secondary heat pump includes a secondary compressor for flowing the secondary refrigerant,
The steam generation system according to any one of claims 1 to 3, wherein the engine drives the primary compressor and the secondary compressor.
PCT/JP2012/081386 2012-03-15 2012-12-04 Steam generating system Ceased WO2013136606A1 (en)

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