JP2007113843A - Local heat supply system - Google Patents

Local heat supply system Download PDF

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JP2007113843A
JP2007113843A JP2005305848A JP2005305848A JP2007113843A JP 2007113843 A JP2007113843 A JP 2007113843A JP 2005305848 A JP2005305848 A JP 2005305848A JP 2005305848 A JP2005305848 A JP 2005305848A JP 2007113843 A JP2007113843 A JP 2007113843A
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heat supply
heat
district
supply system
supply plant
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JP4266375B2 (en
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Toshiharu Yoshida
敏晴 吉田
Hiroshi Honma
博司 本間
Minetada Okamura
峰督 岡村
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Shinryo Corp
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Shinryo Corp
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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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/17—District heating
    • 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]

Abstract

<P>PROBLEM TO BE SOLVED: To maintain a temperature of a heating medium supplied to a receiving facility side of a consumer side at a proper temperature when operation of a heat supply plant is resumed after its shutdown. <P>SOLUTION: The local heat supply system is composed by connecting a plurality of heat supply plants 1, 2 provided with heat source facilities 8, 20 for the heating medium, and receiving facilities 3, 4 of consumers X, Y via a local heat circulation facility 5. It is characterized in that bypass pipe arrangements 12, 24 are provided in the heat supply plants 1, 2 so as to bypass the heat source facilities 8, 20, control valves 13, 25 are provided in the bypass pipe arrangements 12, 24, and the control valves 13, 25 are composed such that they can be opened during stoppage of the heat source facilities 8, 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、熱供給プラントと需要家の受入設備とを地域熱循環設備により接続して構成される地域熱供給システムに関し、特に、複数の熱供給プラントを備えた地域熱供給システムに関する。   The present invention relates to a district heat supply system configured by connecting a heat supply plant and a customer receiving facility by a district heat circulation facility, and more particularly to a district heat supply system including a plurality of heat supply plants.

近年、商業施設やマンション等の各ビル群が設置される地域において、ビル毎にそれぞれ個別に冷凍機やボイラ等の冷暖房や給湯用の熱源設備を設置する代わりに、これらのビル群を含む地域全体に対する熱源設備として、特定の場所に熱供給プラントを設置し、該熱供給プラントから各ビルの受入設備に対して、冷水や温水等の熱媒体を供給する地域熱供給システムが注目されている。   In recent years, in areas where each group of buildings such as commercial facilities and condominiums is installed, instead of installing individual heat source equipment for air conditioning and hot water such as refrigerators and boilers for each building, the area including these buildings As a heat source facility for the whole, a district heat supply system that installs a heat supply plant in a specific place and supplies a heat medium such as cold water or hot water from the heat supply plant to the receiving facilities of each building is attracting attention. .

この従来の地域熱供給システムの一例として、複数の熱供給プラントが連系して接続されたものがあり、この種の地域熱供給システムでは、各熱供給プラントに、それぞれ、冷凍機やボイラ等の熱源設備や圧送ポンプ等の圧送設備が設けられ、各熱供給プラント同士は、地域熱循環設備を介して、接続されている。   As an example of this conventional district heat supply system, there is a system in which a plurality of heat supply plants are connected to each other. In this type of district heat supply system, each heat supply plant has a refrigerator, a boiler, etc. The heat source equipment and the pressure feed equipment such as the pressure feed pump are provided, and the heat supply plants are connected to each other through the district heat circulation equipment.

そして、このような構成を備えた地域熱供給システムにおいて、各熱供給プラントからは、需要家の受入設備側の負荷に応じて、所要流量の熱媒体が、地域熱循環設備を介して、各需要家の受入設備にそれぞれ供給されるようになっている（例えば、特許文献１参照）。
特開２００１−１５３３８１号公報 And in the district heat supply system provided with such a configuration, each heat supply plant has a required flow rate of heat medium through the district heat circulation facility according to the load on the customer's receiving facility side. It is supplied to each customer's receiving facility (see, for example, Patent Document 1).
JP 2001-153381 A

しかしながら、上記した従来の地域熱供給システムでは、その運転条件によっては低負荷時等に、一部の熱供給プラントにおいて熱源装置をまったく運転しない状態が発生することがある。このような場合、熱源設備が停止した熱供給プラントでは、熱源設備や配管系内の保有水の温度が熱損失により上昇或いは下降するため、熱供給プラントの運転再開時に、この保有水が地域熱循環設備を介して需要家の受入設備に供給されると、該受入設備側の熱媒体の温度が所要温度より上昇或いは下降してしまい、熱供給規定（条件）を満足できないといった問題があった。   However, in the conventional district heat supply system described above, depending on the operation conditions, a state in which the heat source device is not operated at all may occur in some heat supply plants at a low load. In such a case, in the heat supply plant in which the heat source facility is stopped, the temperature of the retained water in the heat source facility and the piping system rises or falls due to heat loss. When supplied to the customer's receiving facility through the circulation facility, the temperature of the heat medium on the receiving facility side rises or falls below the required temperature, and there is a problem that the heat supply regulations (conditions) cannot be satisfied. .

本発明は、上記した課題を解決すべくなされたものであり、熱供給プラントの運転停止後、その運転が再開された時に、需要家の受入設備側に供給される熱媒体の温度を適正温度に保持することのできる地域熱供給システムを提供することを目的とする。   The present invention has been made to solve the above-described problems. When the operation is resumed after the operation of the heat supply plant is stopped, the temperature of the heat medium supplied to the receiving facility side of the consumer is set to an appropriate temperature. It is an object to provide a district heat supply system that can be maintained at a low temperature.

上記目的を達成するため、本発明は、熱媒体の熱源設備を備えた複数の熱供給プラントと需要家の受入設備とが、地域熱循環設備を介して接続されて構成された地域熱供給システムであって、前記熱供給プラントには、前記熱源設備を迂回するようにバイパス配管が設けられ、該バイパス配管には制御弁が設けられ、該制御弁は、前記熱源設備の停止中に開放可能なように構成されていることを特徴とする。   In order to achieve the above object, the present invention provides a district heat supply system in which a plurality of heat supply plants having a heat source facility for a heat medium and a customer receiving facility are connected via a district heat circulation facility. The heat supply plant is provided with a bypass pipe so as to bypass the heat source equipment, and the bypass pipe is provided with a control valve, and the control valve can be opened while the heat source equipment is stopped. It is configured as described above.

さらに、前記バイパス配管及び前記制御弁は、前記各熱供給プラントにそれぞれ１箇所ずつ設けられている。   Further, the bypass pipe and the control valve are provided in one place in each of the heat supply plants.

また、本発明の地域熱供給システムには、前記熱供給プラント内を流通する熱媒体の温度を計測する温度計測手段が設けられており、前記制御弁は、前記温度計測手段による前記熱媒体の温度の計測結果に基づき、開閉可能なように構成されていてもよい。   Further, the district heat supply system of the present invention is provided with temperature measuring means for measuring the temperature of the heat medium flowing in the heat supply plant, and the control valve is configured to measure the temperature of the heat medium by the temperature measuring means. Based on the measurement result of temperature, you may be comprised so that opening and closing is possible.

また、本発明の地域熱供給システムには、前記熱供給プラントの停止条件と連動して予め設定した時間に作動するタイマーが設けられており、前記制御弁は、前記タイマーの作動に基づき、開閉可能なように構成されていてもよい。   Further, the district heat supply system of the present invention is provided with a timer that operates at a preset time in conjunction with a stop condition of the heat supply plant, and the control valve opens and closes based on the operation of the timer. It may be configured as possible.

本発明に係る地域熱供給システムによれば、一部の熱供給プラントが運転を停止しても、熱媒体は、バイパス配管を通って、停止中の熱供給プラント内を循環するようになっているため、停止していた熱供給プラントの運転再開時に、その保有水がシステム内に流入しても、システム内において、熱媒体の温度の上昇或いは下降を抑制することができ、熱媒体の温度を適正温度に保持することができる。したがって、熱供給規定（条件）を満足できないといった問題の発生を防止することができ、システムの信頼性の向上を図ることができる等、種々の優れた効果を得ることができる。   According to the district heat supply system according to the present invention, even when some of the heat supply plants stop operating, the heat medium circulates in the stopped heat supply plant through the bypass pipe. Therefore, even when the retained water flows into the system when the operation of the heat supply plant that has been stopped is resumed, the temperature rise or fall of the heat medium can be suppressed in the system. Can be maintained at an appropriate temperature. Therefore, it is possible to prevent the occurrence of a problem that the heat supply regulations (conditions) cannot be satisfied, and to obtain various excellent effects such as improvement of system reliability.

以下、図面を参照しつつ、本発明の実施の形態に係る地域熱供給システムについて説明する。ここで、図１は、本発明の実施の形態に係る地域熱供給システムの構成を示すシステム図である。なお、以下の説明では、熱媒体として冷水を使用した場合について例示して説明する。   Hereinafter, a district heat supply system according to an embodiment of the present invention will be described with reference to the drawings. Here, FIG. 1 is a system diagram showing the configuration of the district heat supply system according to the embodiment of the present invention. In the following description, a case where cold water is used as the heat medium will be described as an example.

本実施の形態に係る地域熱供給システムは、第１熱供給プラント１及び第２熱供給プラント２と、複数の需要家Ｘ，Ｙの受入設備３，４とが、地域熱循環設備５により、連系して接続されて構成されている。   In the district heat supply system according to the present embodiment, the first heat supply plant 1 and the second heat supply plant 2 and the receiving facilities 3 and 4 of the plurality of consumers X and Y are provided by the district heat circulation facility 5. It is connected and connected.

第１熱供給プラント１には、冷凍機８（１〜複数台）、冷水圧送ポンプ９（１〜複数台）、流量調整弁１０が順次直列に接続される熱源配管１１と、熱源配管１１を迂回するように往路配管１４と還路配管１５との間に接続されるバイパス配管１２とが設けられている。そして、バイパス配管１２には、制御弁１３が設けられており、この制御弁１３は、第１熱供給プラント１の停止条件と連動して冷凍機８（１〜複数台）の停止中に開放され、その運転中は閉塞されるように制御される。   The first heat supply plant 1 includes a heat source pipe 11 and a heat source pipe 11 in which a refrigerator 8 (one or more units), a chilled water pump 9 (one or more units), and a flow rate adjusting valve 10 are sequentially connected in series. A bypass pipe 12 connected between the forward pipe 14 and the return pipe 15 is provided so as to make a detour. The bypass pipe 12 is provided with a control valve 13 that is opened during the stop of the refrigerator 8 (one or more units) in conjunction with the stop condition of the first heat supply plant 1. And is controlled to be closed during the operation.

また、第１熱供給プラント１には、往路配管１４と還路配管１５との間に差圧調整配管１６が分岐して接続されている。この差圧調整配管１６には、差圧調整弁１７が設けられていると共に、往路配管１４と還路配管１５間の差圧を検出するため、差圧検出器１８が設けられており、この差圧検出器１８により検出された差圧に基づき、差圧調整弁１７の開度が制御されるようになっている。   In addition, a differential pressure adjustment pipe 16 is branched and connected to the first heat supply plant 1 between the forward pipe 14 and the return pipe 15. The differential pressure adjusting pipe 16 is provided with a differential pressure adjusting valve 17 and a differential pressure detector 18 for detecting a differential pressure between the forward pipe 14 and the return pipe 15. Based on the differential pressure detected by the differential pressure detector 18, the opening degree of the differential pressure regulating valve 17 is controlled.

さらに、差圧調整配管１６の還路配管１５側には、加圧装置として、加圧タンク１９が接続されており、この加圧タンク１９により、冷水圧送ポンプ９（１〜複数台）の稼動中に配管系内が飽和圧力以下になるのを防止できるようになっている。なお、加圧装置としては、この加圧タンク１９に限定されるものではなく、例えば、静水頭加圧法等、他の装置を使用することもできる。   Furthermore, a pressure tank 19 is connected as a pressure device to the return pressure pipe 15 side of the differential pressure adjusting pipe 16, and the cold water pressure pump 9 (one or more) is operated by the pressure tank 19. It is possible to prevent the inside of the piping system from becoming below the saturation pressure. Note that the pressurizing device is not limited to the pressurizing tank 19, and other devices such as a hydrostatic head pressurizing method may be used.

一方、第２熱供給プラント２には、上記した第１熱供給プラント１の場合と同様に、冷凍機２０、冷水圧送ポンプ２１、流量調整弁２２が順次、熱源配管２３に接続されていると共に、バイパス配管２４に制御弁２５が設けられている。また、往路配管２６と還路配管２７との間に分岐接続された差圧調整配管２８には、差圧調整弁２９及び差圧検出器３１がそれぞれ設けられ、還路配管２７には加圧タンク３０が設けられている。   On the other hand, in the second heat supply plant 2, as in the case of the first heat supply plant 1, a refrigerator 20, a cold water pump 21, and a flow rate adjustment valve 22 are sequentially connected to a heat source pipe 23. A control valve 25 is provided in the bypass pipe 24. In addition, a differential pressure adjusting valve 28 and a differential pressure detector 31 are provided in the differential pressure adjusting pipe 28 branchedly connected between the forward pipe 26 and the return pipe 27, and the return pipe 27 is pressurized. A tank 30 is provided.

なお、上記したバイパス配管１２，２４及び制御弁１３，２５は、各熱供給プラント１，２にそれぞれ１箇所ずつ設けられている。   The bypass pipes 12 and 24 and the control valves 13 and 25 described above are provided in one place in each of the heat supply plants 1 and 2.

地域熱循環設備５には、往路系統６と還路系統７が設けられており、往路系統６は、第１及び第２熱供給プラント１，２の各往路配管１４，２６にそれぞれ接続され、還路系統７は、第１及び第２熱供給プラント１，２の各還路配管１５，２７にそれぞれ接続されている。これにより、各需要家設備Ｘ，Ｙの受入設備３，４には、第１熱供給プラント１と第２熱供給プラント２のいずれの熱供給プラントからも冷水を供給可能となっている。   The district heat circulation facility 5 is provided with a forward route system 6 and a return route system 7, and the forward route system 6 is connected to each of the forward route pipes 14 and 26 of the first and second heat supply plants 1 and 2, respectively. The return path system 7 is connected to the return path pipes 15 and 27 of the first and second heat supply plants 1 and 2, respectively. Thereby, the cold water can be supplied to the receiving facilities 3 and 4 of the customer facilities X and Y from any one of the first heat supply plant 1 and the second heat supply plant 2.

次に、図２及び図３を参照しつつ、本発明の実施の形態に係る地域熱供給システムの作用について説明する。ここで、図２は、本発明の実施の形態に係る地域熱供給システムにおいて、両方の熱供給プラント１，２が運転中の場合の作用を示すシステム図、図３は、一方の熱供給プラント２が停止中の場合の作用を示すシステム図である。   Next, the operation of the district heat supply system according to the embodiment of the present invention will be described with reference to FIGS. 2 and 3. Here, FIG. 2 is a system diagram showing an operation when both heat supply plants 1 and 2 are operating in the district heat supply system according to the embodiment of the present invention, and FIG. 3 is one heat supply plant. It is a system diagram which shows an effect | action when 2 has stopped.

先ず、図２に示すように、第１及び第２熱供給プラント１，２において冷凍機８，２０（いずれも１〜複数台）がそれぞれ運転されている場合、各熱供給プラント１，２では、その運転信号を受けて、冷水圧送ポンプ９，２１（いずれも１〜複数台）が運転されると共に流量調整弁１０，２２が開放され、制御弁１３，２５が閉塞される。これにより、各熱供給プラント１，２において、冷水は、それぞれ熱源配管１１，２３を流通するようになる。   First, as shown in FIG. 2, when the refrigerators 8 and 20 (both one to a plurality of units) are operated in the first and second heat supply plants 1 and 2, In response to the operation signal, the cold water pumps 9 and 21 (one to a plurality of pumps) are operated, the flow rate adjusting valves 10 and 22 are opened, and the control valves 13 and 25 are closed. Thereby, in each heat supply plant 1 and 2, cold water comes to circulate through heat source piping 11 and 23, respectively.

この時、第１熱供給プラント１では、差圧検出器１８により往路配管１４と還路配管１５間の差圧が検出され、その検出信号を受けて、差圧調整弁１７の開度が制御されると共に、第２熱供給プラント２では、差圧検出器３１により往路配管２６と還路配管２７間の差圧が検出され、その検出信号を受けて、差圧調整弁２９の開度が制御される。これにより、各熱源配管１１，２３を流通した冷水は、それぞれ往路配管１４，２６に流入後、所定熱量分の流量が地域熱循環設備５の往路系統６に流入し、その残部は各差圧調整配管１６，２８を通って還路配管１５，２７に還流する。   At this time, in the first heat supply plant 1, the differential pressure detector 18 detects the differential pressure between the forward piping 14 and the return piping 15 and receives the detection signal to control the opening of the differential pressure adjusting valve 17. At the same time, in the second heat supply plant 2, the differential pressure detector 31 detects the differential pressure between the forward piping 26 and the return piping 27, and receives the detection signal to determine the opening of the differential pressure regulating valve 29. Be controlled. As a result, the chilled water flowing through the heat source pipes 11 and 23 flows into the forward pipes 14 and 26, respectively, and then a flow rate corresponding to a predetermined amount of heat flows into the forward path system 6 of the regional heat circulation facility 5, and the remainder is the differential pressure. It returns to the return pipes 15 and 27 through the adjustment pipes 16 and 28.

そして、地域熱循環設備５の往路系統６に流入した冷水は、各需要家Ｘ，Ｙの受入設備３，４に供給され、例えば、需要家設備Ｘには、第１熱供給プラント１側から所要流量の冷水が供給され、需要家設備Ｙには、第１及び第２熱供給プラント１，２の両方の熱供給プラントからそれぞれ所要流量の冷水が合流して供給される。   And the cold water which flowed into the outward system 6 of the district heat circulation facility 5 is supplied to the receiving facilities 3 and 4 of each customer X and Y, for example, the customer facility X is supplied from the first heat supply plant 1 side. The required amount of cold water is supplied, and the customer facility Y is supplied with the required amount of cold water from both the first and second heat supply plants 1 and 2.

その後、需要家設備Ｘに供給された冷水は、還路系統７を通って、第１熱供給プラント１に還流すると共に、需要家設備Ｙに供給された冷水は、還路系統７を通って、第１熱供給プラント１及び第２熱供給プラント２に還流し、これにより、冷水は地域熱供給システム内を循環する。   Thereafter, the cold water supplied to the customer facility X passes through the return path system 7 and returns to the first heat supply plant 1, and the cold water supplied to the customer equipment Y passes through the return path system 7. , It is returned to the first heat supply plant 1 and the second heat supply plant 2, whereby cold water circulates in the district heat supply system.

次に、図３に示すように、前記地域熱供給システムの運転条件に基づき、例えば、低負荷時に、第２熱供給プラント２の冷凍機２０（１〜複数台）が停止されると、第２熱供給プラント２では、その停止信号を受けて、冷水圧送ポンプ２１（１〜複数台）が停止されると共に流量調整弁２２が閉塞され、制御弁２５が開放される。一方、第１熱供給プラント１では、制御弁１３が閉塞された状態に保持され、冷水は、引き続き、熱源配管１１を流通する。この時、第１熱供給プラント１では、差圧検出器１８により往路配管１４と還路配管１５間の差圧が検出され、その検出信号を受けて、差圧調整弁１７の開度が制御されると共に、第２熱供給プラント２では、差圧検出器３１により往路配管２６と還路配管２７間の差圧が検出され、その検出信号を受けて、差圧調整弁２９の開度が制御される。   Next, as shown in FIG. 3, based on the operating conditions of the district heat supply system, for example, when the refrigerators 20 (one or more) of the second heat supply plant 2 are stopped at a low load, In the 2 heat supply plant 2, in response to the stop signal, the chilled water pumps 21 (one or more) are stopped, the flow rate adjusting valve 22 is closed, and the control valve 25 is opened. On the other hand, in the 1st heat supply plant 1, the control valve 13 is hold | maintained in the obstruct | occluded state, and chilled water distribute | circulates the heat source piping 11 continuously. At this time, in the first heat supply plant 1, the differential pressure detector 18 detects the differential pressure between the forward piping 14 and the return piping 15 and receives the detection signal to control the opening of the differential pressure adjusting valve 17. At the same time, in the second heat supply plant 2, the differential pressure detector 31 detects the differential pressure between the forward piping 26 and the return piping 27, and receives the detection signal to determine the opening of the differential pressure regulating valve 29. Be controlled.

そして、第１熱供給プラント１において熱源配管１１を流通した冷水は、往路配管１４に流入後、所定熱量分の流量が地域熱循環設備５の往路系統６に流入し、その残部は差圧調整配管１６を通って還路配管１５に還流する。   And the cold water which distribute | circulated the heat source piping 11 in the 1st heat supply plant 1 flows into the outward piping 14, the flow for predetermined amount of heat | fever flows into the outward system 6 of the district heat circulation equipment 5, and the remainder is pressure regulation adjustment. It returns to the return pipe 15 through the pipe 16.

次いで、第１熱供給プラント１から地域熱循環設備５の往路系統６に流入した冷水のうち所要流量分の冷水は、各需要家Ｘ，Ｙの受入設備３，４にそれぞれ供給され、残りの冷水は、往路系統６から第２熱供給プラント２の往路配管２６に流入する。第２熱供給プラント２の往路配管２６に流入した冷水のさらに所定流量分は、バイパス管２４を流通し、その残りの冷水は差圧調整配管２８を流通する。その後、両方の経路を流通した冷水は、還路配管２７において、再度合流し、地域熱循環設備５の還路系統７に還流し、各需要家Ｘ，Ｙの受入設備３，４から還流した冷水と合流した後、還路系統７を通って、第１熱供給プラント１に還流し、これにより、冷水は地域熱供給システム内を循環する。   Next, of the cold water that has flowed from the first heat supply plant 1 into the outbound route 6 of the district heat circulation facility 5, the chilled water corresponding to the required flow rate is supplied to the receiving facilities 3 and 4 of the consumers X and Y, respectively, and the remaining The cold water flows from the forward path system 6 into the forward pipe 26 of the second heat supply plant 2. A further predetermined flow rate of the cold water flowing into the forward piping 26 of the second heat supply plant 2 flows through the bypass pipe 24, and the remaining cold water flows through the differential pressure adjusting pipe 28. Thereafter, the chilled water that has circulated through both routes merges again in the return pipe 27, returns to the return path system 7 of the regional heat circulation facility 5, and returns from the receiving facilities 3 and 4 of the consumers X and Y. After joining with cold water, it returns to the 1st heat supply plant 1 through the return route system 7, and, thereby, cold water circulates in the district heat supply system.

その後、需要家Ｘ，Ｙの負荷が増加し、第２熱供給プラント２の冷凍機２０（１〜複数台）の運転が再開されると、第２熱供給プラント２では、その運転信号を受けて、冷水圧送ポンプ２１（１〜複数台）が運転されると共に流量調整弁２２が開放され、制御弁２５が閉塞され、これにより、冷凍機２０（１〜複数台）、冷水圧送ポンプ２１（１〜複数台）、及び熱源配管２３内の保有水が往路配管２６内に流入する。   Thereafter, when the loads of the consumers X and Y increase and the operation of the refrigerators 20 (one to a plurality of units) of the second heat supply plant 2 is resumed, the second heat supply plant 2 receives the operation signal. Then, the chilled water pressure pump 21 (one or more units) is operated and the flow rate adjusting valve 22 is opened, and the control valve 25 is closed, whereby the refrigerator 20 (one or more units) and the chilled water pressure pump 21 ( 1 to a plurality of units) and the retained water in the heat source pipe 23 flows into the forward pipe 26.

この場合、上記したように、第２熱供給プラント２では、冷凍機２０（１〜複数台）の停止中でも、冷水が、バイパス配管２４を通って、往路配管２６及び還路配管２７内を循環しており、冷水の温度を所定温度以下に保持しているため、第２熱供給プラント２の運転が再開された時に冷凍機２０や熱源配管２３等の保有水が往路配管２６内に流入しても、冷水の温度上昇を抑制することができる。   In this case, as described above, in the second heat supply plant 2, even when the refrigerator 20 (one or more units) is stopped, the cold water passes through the bypass pipe 24 and circulates in the forward pipe 26 and the return pipe 27. Since the temperature of the chilled water is kept below a predetermined temperature, the retained water such as the refrigerator 20 and the heat source pipe 23 flows into the outgoing pipe 26 when the operation of the second heat supply plant 2 is resumed. However, the temperature rise of cold water can be suppressed.

なお、上記実施の形態において、制御弁１３，２５は、熱供給プラントの停止条件と連動して冷凍機８（１〜複数台）、冷凍機２０（１〜複数台）の停止信号を受けて、開放されるようになっているが、これは単なる例示に過ぎず、制御弁１３，２５の開閉制御については各種変更が可能である。具体的には、例えば、各熱供給プラント１，２内に冷水の温度を計測する温度計測手段を設け、いずれか一方の熱供給プラント１，２の運転停止中に前記温度計測手段による冷水温度の計測値が、予め設定された所定温度より高くなった場合に制御弁１３，２５を開放し、それより低い場合には制御弁１３，２５を閉塞するように制御したり、或いは、熱供給プラントの停止条件と連動して予め設定した時間に作動するタイマーを設け、いずれか一方の熱供給プラント１，２の運転停止中、前記タイマーの作動に基づき、制御弁１３,２５を開閉するように制御したり、或いは、遠方から制御弁１３,２５を開閉操作するようにしたり、或いは、上記した各制御方法を組合せて制御弁１３，２５を制御したりすることができる。   In the embodiment described above, the control valves 13 and 25 receive stop signals from the refrigerator 8 (one or more units) and the refrigerator 20 (one or more units) in conjunction with the stop condition of the heat supply plant. However, this is merely an example, and various changes can be made to the opening / closing control of the control valves 13 and 25. Specifically, for example, a temperature measuring unit that measures the temperature of cold water is provided in each of the heat supply plants 1 and 2, and the temperature of the cold water by the temperature measuring unit is stopped during the operation stop of any one of the heat supply plants 1 and 2. When the measured value becomes higher than a predetermined temperature set in advance, the control valves 13 and 25 are opened, and when the measured value is lower than that, the control valves 13 and 25 are closed or the heat supply is performed. A timer that operates at a preset time in conjunction with the stop condition of the plant is provided, and when the operation of one of the heat supply plants 1 and 2 is stopped, the control valves 13 and 25 are opened and closed based on the operation of the timer. Or the control valves 13 and 25 can be opened and closed from a distance, or the control valves 13 and 25 can be controlled by combining the control methods described above.

また、熱供給プラント１，２内の保有水の量が比較的少ない場合には、差圧調整弁１７，２９に、上記した制御弁１３，２５の機能を持たせることもでき、その場合には、制御弁１３，２５及びバイパス配管１２，２４を省略することができるため、システムの簡素化を一段と図ることが可能となる。   Further, when the amount of retained water in the heat supply plants 1 and 2 is relatively small, the differential pressure regulating valves 17 and 29 can be provided with the functions of the control valves 13 and 25 described above. Since the control valves 13 and 25 and the bypass pipes 12 and 24 can be omitted, the system can be further simplified.

さらに、上記実施の形態では、熱媒体として冷水を使用した場合について説明したが、本発明は、温水や高温水等、他の熱媒体を使用するシステムにおいても適用可能である。   Furthermore, although the case where cold water is used as the heat medium has been described in the above embodiment, the present invention can also be applied to a system using other heat medium such as hot water or high temperature water.

さらにまた、本発明は、上記したように、第１熱供給プラント１と第２熱供給プラント２とが連系して接続されている場合においての適用に限定されるものではなく、３つ以上の熱供給プラントが連系して接続されている場合にも適用可能であることは言う迄もない。   Furthermore, as described above, the present invention is not limited to application in the case where the first heat supply plant 1 and the second heat supply plant 2 are connected in a connected manner, and three or more Needless to say, the present invention can also be applied to the case where the heat supply plants are connected in a connected manner.

本発明の実施の形態に係る地域熱供給システムの構成を示すシステム図である。It is a system diagram which shows the structure of the district heat supply system which concerns on embodiment of this invention. 本発明の実施の形態に係る地域熱供給システムの作用を示すシステム図である。It is a system diagram which shows the effect | action of the district heat supply system which concerns on embodiment of this invention. 本発明の実施の形態に係る地域熱供給システムの作用を示すシステム図である。It is a system diagram which shows the effect | action of the district heat supply system which concerns on embodiment of this invention.

符号の説明Explanation of symbols

１ 第１熱供給プラント
２ 第２熱供給プラント
３ 需要家Ｘの受入設備
４ 需要家Ｙの受入設備
８ 冷凍機（１〜複数台）
１２ バイパス配管
１３ 制御弁
２０ 冷凍機（１〜複数台）
２４ バイパス配管
２５ 制御弁 DESCRIPTION OF SYMBOLS 1 1st heat supply plant 2 2nd heat supply plant 3 Reception equipment of customer X 4 Reception equipment of customer Y 8 Refrigerator (one or more units)
12 Bypass piping 13 Control valve 20 Refrigerator (1 to 2 units)
24 Bypass piping 25 Control valve

Claims (4)

熱媒体の熱源設備を備えた複数の熱供給プラントと需要家の受入設備とが、地域熱循環設備を介して接続されて構成された地域熱供給システムであって、
前記熱供給プラントには、前記熱源設備を迂回するようにバイパス配管が設けられ、該バイパス配管には制御弁が設けられ、該制御弁は、前記熱源設備の停止中に開放可能なように構成されていることを特徴とする地域熱供給システム。 A district heat supply system in which a plurality of heat supply plants having a heat source facility for heat medium and a customer receiving facility are connected via a district heat circulation facility,
The heat supply plant is provided with a bypass pipe so as to bypass the heat source equipment, and the bypass pipe is provided with a control valve, and the control valve is configured to be openable when the heat source equipment is stopped. District heat supply system characterized by being. 前記バイパス配管及び前記制御弁は、前記各熱供給プラントにそれぞれ１箇所ずつ設けられている請求項１に記載の地域熱供給システム。 2. The district heat supply system according to claim 1, wherein the bypass pipe and the control valve are provided in each of the heat supply plants. 前記熱供給プラント内を流通する熱媒体の温度を計測する温度計測手段が設けられており、前記制御弁は、前記温度計測手段による前記熱媒体の温度の計測結果に基づき、開閉可能なように構成されている請求項１又は２に記載の地域熱供給システム。 Temperature measuring means for measuring the temperature of the heat medium flowing through the heat supply plant is provided, and the control valve can be opened and closed based on the measurement result of the temperature of the heat medium by the temperature measuring means. The district heat supply system of Claim 1 or 2 comprised. 前記熱供給プラントの停止条件と連動して予め設定した時間に作動するタイマーが設けられており、前記制御弁は、前記タイマーの作動に基づき、開閉可能なように構成されている請求項１から３のいずれか１の請求項に記載の地域熱供給システム。
A timer that operates at a preset time in conjunction with a stop condition of the heat supply plant is provided, and the control valve is configured to be openable and closable based on the operation of the timer. The district heat supply system according to claim 1.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101319975B1 (en) * 2011-10-27 2013-10-22 한국에너지기술연구원 Thermal energy network system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101319975B1 (en) * 2011-10-27 2013-10-22 한국에너지기술연구원 Thermal energy network system

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