JP6506918B2

JP6506918B2 - Ice storage system

Info

Publication number: JP6506918B2
Application number: JP2014087523A
Authority: JP
Inventors: 光生山形; 隆司篠島; 智安心院
Original assignee: Takenaka Corp
Current assignee: Takenaka Corp
Priority date: 2014-04-21
Filing date: 2014-04-21
Publication date: 2019-04-24
Anticipated expiration: 2034-04-21
Also published as: JP2015206543A

Description

本発明は、冷熱源からの冷熱を蓄熱する氷蓄熱槽と、その氷蓄熱槽に蓄熱されている冷熱を放熱対象流体に放熱させる放熱運転を行う放熱部とが備えられている氷蓄熱システムに関する。 The present invention relates to an ice heat storage system including an ice heat storage tank for storing cold heat from a cold heat source and a heat radiating unit for performing a heat radiation operation for radiating the cold heat stored in the ice heat storage tank to a heat radiation target fluid .

上記のような氷蓄熱システムでは、例えば、冷熱源からの冷熱を有する不凍液（例えば、ブライン）を氷蓄熱槽の伝熱管に供給し、その伝熱管の外周に製氷することで、氷蓄熱槽に冷熱源からの冷熱を蓄熱している。そして、放熱部が放熱運転を行うことで、氷蓄熱槽に蓄熱されている冷熱を蓄熱槽から取り出して、放熱対象流体としての空調用流体に放熱させて冷房等の空調を行うようにしている（例えば、特許文献１、２参照。）。 In the above ice heat storage system, for example, an antifreeze solution (for example, brine) having cold heat from a cold heat source is supplied to the heat transfer tube of the ice heat storage tank, and ice is produced on the outer periphery of the heat transfer tube. The cold heat from the cold heat source is stored. Then, the heat radiating portion performs the heat radiating operation to take cold heat stored in the ice heat storage tank out of the heat storage tank, radiate the heat to the air conditioning fluid as the heat radiation target fluid, and perform air conditioning such as cooling. (See, for example, Patent Documents 1 and 2).

上記特許文献１、２に記載のシステムでは、放熱部が、氷蓄熱槽の伝熱管の内部に不凍液を供給することで、氷を伝熱管の内側から融解させて不凍液にて冷熱を取り出し、その取り出した冷熱を放熱対象流体に放熱させる所謂内融式の放熱運転と、氷蓄熱槽の伝熱管の周囲に水等の熱媒体を供給することで、氷を外側から融解させてその融解水を含む熱媒体にて冷熱を取り出し、その取り出した冷熱を放熱対象流体に放熱させる所謂外融式の放熱運転とに切換自在に構成されている。また、放熱部とは別に、冷熱源からの冷熱を有する不凍液から放熱対象流体に放熱させる付加放熱運転を行う付加放熱部が備えられている。 In the systems described in Patent Documents 1 and 2 above, the heat dissipation unit supplies antifreeze to the inside of the heat transfer tube of the ice storage tank, thereby melting ice from the inside of the heat transfer tube and taking cold heat with the antifreeze. A so-called internal heat dissipation operation that dissipates the extracted cold heat to the fluid to be dissipated and a heat transfer medium such as water around the heat transfer tube of the ice storage tank to melt the ice from the outside and melt the water The cooling medium is taken out by the heat medium containing, and it is configured to be switchable to a so-called external melting type heat radiation operation in which the taken-out cold heat is radiated to the heat radiation target fluid. In addition to the heat radiating portion, an additional heat radiating portion is provided which performs an additional heat radiating operation for radiating heat from the antifreeze liquid having cold heat from the cold heat source to the heat radiation target fluid.

上記特許文献１に記載のシステムでは、放熱部にて外融式の放熱運転を行うとともに、付加放熱部による付加放熱運転を行っている場合に、空調負荷が小さくなると、付加放熱部による付加放熱運転を停止し、放熱部にて外融式と内融式の両方の放熱運転を行うようにしている。 In the system described in Patent Document 1 above, when the heat dissipation section performs the heat dissipation operation of the external melting type and the additional heat dissipation section performs the additional heat dissipation operation, if the air conditioning load decreases, the additional heat dissipation by the additional heat dissipation section The operation is stopped, and both the external melting type and the internal melting type heat dissipation operation are performed in the heat dissipation section.

上記特許文献２に記載のシステムでは、放熱部による外融式の放熱運転のみ、或いは、その放熱部による外融式の放熱運転に加えて、付加放熱部による付加放熱運転を行っている場合に、例えば、一日の冷房時間帯の終わり等になると、製氷された氷の全てを融解するために、付加放熱部による付加放熱運転を行わずに、放熱部にて外融式と内融式の両方の放熱運転を行うようにしている。 In the system described in Patent Document 2, when performing the additional heat dissipation operation by the additional heat dissipation unit, in addition to the external heat dissipation operation by the heat dissipation unit or the external heat dissipation operation by the heat dissipation unit. For example, at the end of the cooling period of a day, etc., in order to melt all of the ice made ice, the heat dissipation section does not perform the additional heat dissipation operation, and the heat dissipation section performs the external melting type and the internal melting type. Both heat dissipation operation is to be performed.

特開２００６−２９２２６７号公報JP, 2006-292267, A 特開平１０−２３８８２８号公報Unexamined-Japanese-Patent No. 10-238828 gazette

上記のような氷蓄熱システムでは、例えば、夜間等の電力需要の少ない期間に、電力を用いて氷蓄熱槽への蓄熱を行い、昼間等の電力需要の多い期間に、氷蓄熱槽に蓄熱された冷熱を用いて冷房等の空調を行うことで、電力需要の多い期間での需要側での消費電力の低減を図るようにしている。 In the ice heat storage system as described above, for example, heat is stored in the ice heat storage tank using power during periods of low power demand such as night time, and is stored in the ice heat storage tank during periods of high power demand such as daytime By performing air conditioning such as cooling using cold energy, power consumption on the demand side during periods of high power demand is intended to be reduced.

最近、電力会社等から供給する電力が不足しそうな時に、各需要家への消費電力の削減要求に応じて需要側が消費電力を調整するデマンドレスポンス（ＤＲ、需要応答）技術が注目されている。上記のような氷蓄熱システムは、例えば、複数の店舗を有する商業施設等の施設に備えられていることから、その施設を含めたエリアを対象とし、氷蓄熱システムにて何らかの対策を講じることで、そのエリアデマンドレスポンス対応を実現することが望まれている。しかしながら、上記特許文献１、２に記載のシステムでは、このようなエリアデマンドレスポンス対応については考慮されていなかった。 Recently, demand response (DR, demand response) technology in which the demand side adjusts the power consumption according to the demand for reduction of the power consumption to each customer when the power supply from the power company or the like is likely to run short has attracted attention. The ice storage system as described above is provided, for example, in a facility such as a commercial facility having a plurality of stores, so the area including the facility is targeted and the ice storage system takes some measures. It is desired to realize the area demand response response. However, in the systems described in Patent Documents 1 and 2 above, such area demand response is not considered.

この実情に鑑み、本発明の主たる課題は、この氷蓄熱システムを有する施設を含むエリアを対象とするデマンドレスポンス対応を実現可能な氷蓄熱システムを提供する点にある。 In view of this situation, the main object of the present invention is to provide an ice thermal storage system capable of realizing a demand response corresponding to an area including a facility having the ice thermal storage system.

本発明の第１特徴構成は、伝熱管の周囲に製氷して冷熱源からの冷熱を蓄熱する氷蓄熱槽と、
その氷蓄熱槽に蓄熱されている冷熱を放熱対象流体に放熱させる放熱運転を行う放熱部と、
前記冷熱源からの冷熱を前記放熱対象流体に放熱させる付加放熱運転を行う付加放熱部とが備えられ、
前記放熱部は、前記放熱運転として、
前記氷蓄熱槽における前記伝熱管の内部に第１熱搬送流体を供給してその伝熱管の内側から氷を融解させて取り出した冷熱を前記放熱対象流体に放熱させる第１運転モードと、
前記氷蓄熱槽における前記伝熱管の外側に第２熱搬送流体を供給して氷を外側から融解させて取り出した冷熱を前記放熱対象流体に放熱させる第２運転モードとの一方及び両方の運転モードを実行可能であり、
前記放熱部が前記第１運転モードと前記第２運転モードの一方の運転モードで放熱運転を実行中であり、且つ、前記付加放熱部が前記付加放熱運転を実行中である場合に、第１運転切換条件が満たされると、前記付加放熱部が運転停止され、前記放熱部が前記第１運転モードと前記第２運転モードの両方の運転モードで放熱運転させるように構成され、
前記第１運転切換条件は、この氷蓄熱システムを有する施設を含めた特定エリアにおける消費電力量が、その特定エリアを対象とするデマンドレスポンス対応として設定される設定電力量を超えることが予想されるタイミングとなる条件に設定され、
前記第１熱搬送流体と前記氷蓄熱槽に供給される前の前記第２熱搬送流体とを熱交換させる第１熱交換部と、
前記第２熱搬送流体と前記放熱対象流体を熱交換させる第２熱交換部とが備えられ、
前記放熱部は、前記第１熱交換部での熱交換及び前記第２熱交換部での熱交換によって前記第１運転モードでの放熱運転を行い、前記第２熱交換部での熱交換によって前記第２運転モードでの放熱運転を行うように構成され、
前記付加放熱部は、前記第１熱交換部での熱交換及び前記第２熱交換部での熱交換によって前記付加放熱運転を行うように構成されている点にある。 According to a first aspect of the present invention, there is provided an ice heat storage tank for producing ice around a heat transfer tube and storing cold heat from a cold heat source;
A heat dissipation unit that performs a heat dissipation operation to dissipate the cold heat stored in the ice heat storage tank to the fluid to be dissipated;
And an additional heat radiation unit for performing an additional heat release operation to release the cold heat from the cold heat source to the heat radiation target fluid,
The heat dissipation unit may perform the heat dissipation operation as follows:
A first operation mode in which a first heat transfer fluid is supplied to the inside of the heat transfer tube in the ice heat storage tank, ice is melted from the inside of the heat transfer tube, and cold heat taken out is dissipated to the fluid to be dissipated;
A second heat transfer fluid is supplied to the outside of the heat transfer tube in the ice heat storage tank, and ice is melted from the outside and the cold heat taken out is dissipated to the fluid to be dissipated Is feasible and
When the heat dissipation unit is performing a heat dissipation operation in one of the first operation mode and the second operation mode, and the additional heat dissipation unit is performing the additional heat dissipation operation, When the operation switching condition is satisfied, the additional heat dissipation unit is stopped, and the heat dissipation unit is configured to perform the heat dissipation operation in both the first operation mode and the second operation mode,
In the first operation switching condition, the power consumption in a specific area including the facility having the ice storage system is expected to exceed the set power which is set as the demand response corresponding to the specific area. It is set to the condition that becomes the timing ,
A first heat exchange unit that exchanges heat between the first heat transfer fluid and the second heat transfer fluid before being supplied to the ice heat storage tank;
A second heat exchange unit for exchanging heat between the second heat transfer fluid and the heat radiation target fluid;
The heat dissipation unit performs a heat dissipation operation in the first operation mode by heat exchange in the first heat exchange unit and heat exchange in the second heat exchange unit, and heat exchange in the second heat exchange unit. It is comprised so that the thermal radiation driving | operation in said 2nd driving | running mode may be performed,
The additional heat dissipation unit is configured to perform the additional heat dissipation operation by heat exchange in the first heat exchange unit and heat exchange in the second heat exchange unit .

特定エリアにおける消費電力量が設定電力量を超えることが予想されるタイミングは、その特定エリアに対して、電力会社等から供給する電力が不足しそうなタイミングである。よって、特定エリアに対するエリアデマンドレスポンス対応としては、このようなタイミングにて特定エリアの消費電力を削減するのが望ましい。そこで、本特徴構成では、第１運転切換条件を、特定エリアにおける消費電力量が設定電力量を超えることが予想されるタイミングとなる条件に設定しており、放熱部が第１運転モードと第２運転モードの一方の運転モードで放熱運転を実行中であり、且つ、付加放熱部が付加放熱運転を実行中である場合に、この第１運転切換条件が満たされると、付加放熱部を運転停止させて、冷熱源を作動させるための消費電力等を削減し、特定エリアの消費電力の削減を図るようにしている。また、付加放熱部を運転停止させるだけでなく、放熱部が第１運転モードと第２運転モードの両方の運転モードで放熱運転させるので、付加放熱部を運転停止させる前における放熱対象流体に対する冷熱の放熱量を維持することができる。これにより、例えば、放熱対象流体を用いて冷房を行う場合でも、その空調負荷を十分に賄うことができる。したがって、放熱対象流体を用いた冷房を適切に行いながら、適切なタイミングで特定エリアの消費電力を削減して、その特定エリアに対するエリアデマンドレスポンス対応を実現することができる。
本特徴構成によれば、放熱部による第１運転モードでの放熱運転及び付加放熱部による付加放熱運転では、第１熱交換部及び第２熱交換部での２段階の熱交換を行っている。これにより、２つの熱交換部を備えるだけで、放熱部による第１運転モード及び第２運転モードでの放熱運転だけでなく、付加放熱部による付加放熱運転も行うことができ、簡易な回路構成を採用することができる。そして、第１熱交換部では、第１熱搬送流体と氷蓄熱槽に供給される前の第２熱搬送流体とを熱交換させるので、放熱部による第１運転モードでの放熱運転及び付加放熱部による付加放熱運転では、第１熱交換部にて第１熱搬送流体によって第２熱搬送流体を冷却させた後、その第２熱搬送流体を蓄熱槽に戻すことができ、氷蓄熱槽における氷の融解が早まるのを抑制できる。 The timing at which the power consumption in the specific area is expected to exceed the set power is the timing when the power supplied from a power company or the like is insufficient for the specific area. Therefore, it is desirable to reduce the power consumption of the specific area at such timing as the area demand response to the specific area. Therefore, in the present characteristic configuration, the first operation switching condition is set to a condition at which it is expected that the power consumption in the specific area exceeds the set power amount, and the heat dissipation unit is set to the first operation mode and the first operation mode. When the heat dissipation operation is being performed in one of the two operation modes and the additional heat dissipation unit is performing the additional heat dissipation operation, if the first operation switching condition is satisfied, the additional heat dissipation unit is operated It is made to stop, the power consumption etc. for operating a cold heat source are reduced, and the reduction of the power consumption of a specific area is aimed at. In addition to stopping the operation of the additional heat radiating portion, the heat radiating portion performs heat dissipation operation in both the first operation mode and the second operation mode. The amount of heat released can be maintained. Thus, even when cooling is performed using, for example, the fluid to be dissipated, the air conditioning load can be sufficiently covered. Therefore, while appropriately performing cooling using a fluid to be dissipated, it is possible to reduce the power consumption of a specific area at an appropriate timing, and realize area demand response to the specific area.
According to the present feature configuration, in the heat dissipation operation in the first operation mode by the heat dissipation unit and the additional heat dissipation operation by the additional heat dissipation unit, heat exchange is performed in two stages in the first heat exchange unit and the second heat exchange unit. . As a result, only by providing two heat exchange units, not only the heat radiation operation in the first operation mode and the second operation mode by the heat radiation unit, but also the additional heat radiation operation by the additional heat radiation unit can be performed. Can be adopted. Then, in the first heat exchange unit, heat exchange is performed between the first heat transfer fluid and the second heat transfer fluid before being supplied to the ice heat storage tank, so the heat release operation and additional heat release in the first operation mode by the heat release unit In the additional heat release operation by the part, after the second heat transfer fluid is cooled by the first heat transfer fluid in the first heat exchange part, the second heat transfer fluid can be returned to the heat storage tank, and the ice heat storage tank It is possible to suppress premature melting of ice.

本発明の第２特徴構成は、前記特定エリアにおける消費電力量が前記設定電力量を超えると予測される逼迫要求を外部から受ける受信部が備えられ、その受信部にて受ける逼迫要求に基づいて、前記第１運転切換条件が満たされるか否かが判別されている点にある。 According to a second aspect of the present invention, there is provided a receiving unit for externally receiving a stress request predicted that the power consumption in the specific area exceeds the set power amount, based on the stress request received by the receiving unit. The point is that it is determined whether or not the first operation switching condition is satisfied.

本特徴構成によれば、特定エリアにおける消費電力量が設定電力量を超えると予測される場合には、電力会社等の外部から氷蓄熱システムに逼迫要求が送信されるので、その逼迫要求を受信部にて受信し、その逼迫要求に基づいて第１運転切換条件が満たされるか否かを判別している。このような判別を行うことで、その特定エリアにおいて消費電力を削減すべきタイミングを的確に判別でき、エリアデマンドレスポンス対応としての電力削減を的確に行うことができる。 According to this feature configuration, when the power consumption in the specific area is predicted to exceed the set power amount, a stress request is transmitted from the outside such as an electric power company to the ice heat storage system, so the stress request is received It is determined by the unit whether or not the first operation switching condition is satisfied based on the pressure request. By performing such a determination, it is possible to accurately determine the timing at which the power consumption should be reduced in the specific area, and it is possible to appropriately perform the power reduction as the area demand response.

本発明の第３特徴構成は、前記冷熱源と前記氷蓄熱槽と前記第１熱交換部のうち、前記第１熱搬送流体を通流させる機器を選択自在で前記第１熱搬送流体を循環させる第１循環回路と、
前記氷蓄熱槽と前記第１熱交換部と前記第２熱交換部のうち、前記第２熱搬送流体を通流させる機器を選択自在で前記第２熱搬送流体を循環させる第２循環回路とが備えられ、前記放熱部は、前記氷蓄熱槽と前記第１熱交換部の間で前記第１熱搬送流体を循環させる状態に前記第１循環回路を切り換え、且つ、前記氷蓄熱槽と前記第１熱交換部と前記第２熱交換部の間で前記第２熱搬送流体を循環させる状態に前記第２循環回路を切り換えて、前記第１運転モードでの放熱運転を行い、
前記氷蓄熱槽と前記第２熱交換部の間で前記第２熱搬送流体を循環させる状態に前記第２循環回路を切り換えて、前記第２運転モードでの放熱運転を行うように構成され、
前記付加放熱部は、前記冷熱源と前記第１熱交換部の間で前記第１熱搬送流体を循環させる状態に前記第１循環回路を切り換え、且つ、前記氷蓄熱槽と前記第１熱交換部と前記第２熱交換部の間で前記第２熱搬送流体を循環させる状態に前記第２循環回路を切り換えて、前記付加放熱運転を行うように構成されている点にある。 According to a third aspect of the present invention, the apparatus for circulating the first heat transfer fluid can be selected to circulate the first heat transfer fluid among the cold heat source, the ice heat storage tank, and the first heat exchange unit. A first circulation circuit to cause
A second circulation circuit that circulates the second heat transfer fluid by selecting one of the ice heat storage tank, the first heat exchange unit, and the second heat exchange unit that allows the second heat transfer fluid to flow; The heat dissipating unit switches the first circulation circuit to a state in which the first heat transfer fluid is circulated between the ice heat storage tank and the first heat exchange unit, and the ice heat storage tank and the ice heat storage tank The second circulation circuit is switched to a state in which the second heat transfer fluid is circulated between the first heat exchange unit and the second heat exchange unit, and heat release operation is performed in the first operation mode,
The heat transfer operation is performed in the second operation mode by switching the second circulation circuit to a state in which the second heat transfer fluid is circulated between the ice heat storage tank and the second heat exchange unit.
The additional heat radiation unit switches the first circulation circuit to a state in which the first heat transfer fluid is circulated between the cold heat source and the first heat exchange unit, and the ice heat storage tank and the first heat exchange The second heat transfer fluid is circulated between the unit and the second heat exchange unit, and the second circulation circuit is switched to perform the additional heat release operation.

本特徴構成によれば、第１循環回路と第２循環回路の２つの循環回路において流体を通流させる機器を切り換えるだけで、放熱部による第１運転モード及び第２運転モードでの放熱運転だけでなく、付加放熱部による付加放熱運転も行うことができ、簡易な回路構成を採用することができる。しかも、放熱部における運転モードの切り換え、及び、付加放熱部における付加放熱運転の切り換えについても、流体を通流させる機器を切り換えるという簡易な動作によって行うことができ、この点からも回路構成の簡素化を図ることができる。
本発明の第４特徴構成は、商業施設に備えられ、
前記放熱部が前記第１運転モードと前記第２運転モードの一方の運転モードで放熱運転を実行し、且つ、前記付加放熱部が前記付加放熱運転を実行中である場合から、前記付加放熱部を運転停止させ、前記放熱部が前記第１運転モードと前記第２運転モードの両方の運転モードで放熱運転させる状態に運転切換を行うときに、周辺地域に対して前記商業施設への来店を促す来店促進情報を発信する点にある。 According to this feature configuration, only by switching the device that allows fluid to flow in the two circulation circuits of the first circulation circuit and the second circulation circuit, only the heat dissipation operation in the first operation mode and the second operation mode by the heat dissipation unit In addition, additional heat dissipation operation can be performed by the additional heat dissipation unit, and a simple circuit configuration can be adopted. Moreover, switching of the operation mode in the heat radiating portion and switching of the additional heat radiating operation in the additional heat radiating portion can also be performed by a simple operation of switching the device through which the fluid flows, from this point as well, the circuit configuration is simplified. Can be implemented.
The fourth feature of the present invention is provided in a commercial facility,
Since the heat dissipation unit performs the heat dissipation operation in one of the first operation mode and the second operation mode, and the additional heat dissipation unit is executing the additional heat dissipation operation, the additional heat dissipation unit When the operation of the heat release unit is switched to a state in which the heat release unit performs the heat release operation in both the first operation mode and the second operation mode, the store visits to the commercial facility with respect to the surrounding area is performed. The point is to send out information to promote store visits.

氷蓄熱システムの概略構成図において蓄熱運転での流体の通流状態を示す図The figure which shows the flow-through state of the fluid in a thermal storage driving | operation in the schematic block diagram of an ice thermal storage system. 氷蓄熱システムの概略構成図において第２運転モードの放熱運転での流体の通流状態を示す図The figure which shows the fluid flow in the thermal radiation operation of the 2nd operation mode in the schematic block diagram of an ice thermal storage system. 氷蓄熱システムの概略構成図において第２運転モードでの放熱運転と付加放熱運転での流体の通流状態を示す図A diagram showing a heat release operation in the second operation mode and a fluid flow state in the additional heat release operation in the schematic configuration diagram of the ice heat storage system 氷蓄熱システムの概略構成図において第１運転モードと第２運転モードの両方の運転モードでの放熱運転における流体の通流状態を示す図The figure which shows the fluid flow in the thermal radiation operation in the operation mode of both the 1st operation mode and the 2nd operation mode in the schematic block diagram of an ice thermal storage system. 特定エリアを示す図Diagram showing a specific area 別実施形態における氷蓄熱システムの概略構成図Schematic configuration diagram of an ice storage system in another embodiment

本発明に係る氷蓄熱システムの実施形態を図面に基づいて説明する。
図１〜図４は、いずれも、氷蓄熱システム１００の概略構成を示すものであるが、流体が通流する部位が異なるものであり、流体が通流しない部位を細線にて示し、流体が通流する部位を太線にて示している。 An embodiment of an ice heat storage system according to the present invention will be described based on the drawings.
1 to 4 all show the schematic configuration of the ice heat storage system 100, but the portions through which the fluid flows are different, and the portions through which the fluid does not flow are shown by thin lines, and the fluid is The portions passing through are indicated by thick lines.

この氷蓄熱システム１００は、図１〜図４に示すように、冷熱源１と、その冷熱源１からの冷熱を蓄熱する氷蓄熱槽２と、冷熱源１の冷熱を氷蓄熱槽２に蓄熱させる蓄熱運転を行う蓄熱部７（図１参照）と、氷蓄熱槽２に蓄熱されている冷熱を放熱対象流体Ｈに放熱させる放熱運転を行う放熱部３（図２参照）と、冷熱源１からの冷熱を放熱対象流体Ｈに放熱させる付加放熱運転を行う付加放熱部４（図３参照）とが備えられている。放熱対象流体Ｈについては、例えば、空調用水等の各種の空調用流体を用いることができる。 The ice heat storage system 100 stores the cold heat of the cold heat source 1, the ice thermal storage tank 2 for storing cold heat from the cold heat source 1, and the cold heat of the cold heat source 1 in the ice thermal storage tank 2, as shown in FIGS. A heat storage unit 7 (see FIG. 1) that performs a heat storage operation to cause heat radiation, a heat radiation unit 3 (see FIG. 2) that performs a heat radiation operation to radiate the cold heat stored in the ice heat storage tank 2 to the heat radiation target fluid H An additional heat radiating portion 4 (see FIG. 3) is provided which performs an additional heat radiating operation for radiating the cold heat from the heat to the heat radiation target fluid H. For the heat radiation target fluid H, for example, various air conditioning fluids such as air conditioning water can be used.

氷蓄熱システム１００では、熱を搬送する流体として、放熱対象流体Ｈの他に、冷熱源１の冷熱を氷蓄熱槽２に搬送する第１熱搬送流体Ｎ１と、氷蓄熱槽２に蓄熱されている冷熱を放熱対象流体Ｈに搬送する第２熱搬送流体Ｎ２とを有している。詳細な図示は省略するが、氷蓄熱槽２は、第１熱搬送流体Ｎ１を通流させる伝熱管２ａを備えており、その伝熱管２ａに冷熱源１の冷熱を有する第１熱搬送流体Ｎ１を通流させることで、伝熱管２ａの周囲に製氷して冷熱源１からの冷熱を蓄熱するようにしている。第１熱搬送流体Ｎ１は、例えば、ブライン等の不凍液を用いることができ、第２熱搬送流体Ｎ２は、例えば、氷蓄熱槽２において伝熱管２ａの周囲を通流する水を用いることができる。図示は省略するが、伝熱管２ａの外周部等に水を散水する散水部を備え、その散水部から散水された水をも含めて、伝熱管２ａの周囲を通流する水を第２熱搬送流体Ｎ２とすることができる。 In the ice heat storage system 100, the first heat transfer fluid N1 for transferring the cold heat of the cold heat source 1 to the ice heat storage tank 2 and the heat storage tank 2 are stored as the fluid for transferring heat. And a second heat transfer fluid N2 for transferring the cold heat to the fluid H to be dissipated. Although the detailed illustration is omitted, the ice heat storage tank 2 is provided with a heat transfer pipe 2a through which the first heat transfer fluid N1 flows, and the first heat transfer fluid N1 having the heat of the cold heat source 1 in the heat transfer pipe 2a. By making it flow, ice is produced around the heat transfer tube 2 a so as to store cold heat from the cold heat source 1. The first heat transfer fluid N1 can use, for example, an antifreeze liquid such as brine, and the second heat transfer fluid N2 can use, for example, water flowing around the heat transfer pipe 2a in the ice thermal storage tank 2 . Although not shown, a water sprinkling portion for sprinkling water is provided on the outer peripheral portion of the heat transfer pipe 2a and the like, and water flowing around the heat transfer pipe 2a including the water sprinkling from the water sprinkling portion It can be the carrier fluid N2.

第１熱搬送流体Ｎ１についての構成として、第１熱搬送流体Ｎ１と第２熱搬送流体Ｎ２を熱交換させる第１熱交換部５と、冷熱源１と氷蓄熱槽２と第１熱交換部５のうち、第１熱搬送流体Ｎ１を通流させる機器を選択自在で第１熱搬送流体Ｎ１を循環させる第１循環回路１０とが備えられている。第１熱交換部５は、第１熱搬送流体Ｎ１と氷蓄熱槽２に供給される前の第２熱搬送流体Ｎ２を熱交換させるように配置されている。 As a configuration for the first heat transfer fluid N1, a first heat exchange unit 5 that exchanges heat between the first heat transfer fluid N1 and the second heat transfer fluid N2, a cold heat source 1, an ice heat storage tank 2, and a first heat exchange unit Among the five, the first circulation circuit 10 for circulating the first heat transfer fluid N1 is provided by freely selecting an apparatus through which the first heat transfer fluid N1 flows. The first heat exchange unit 5 is arranged to exchange heat between the first heat transfer fluid N1 and the second heat transfer fluid N2 before being supplied to the ice storage tank 2.

第１循環回路１０は、冷熱源１、氷蓄熱槽２における伝熱管２ａの内部、第１熱交換部５の順で第１熱搬送流体Ｎ１を循環自在な第１流路部位１１と、第１熱搬送流体Ｎ１を循環通流させる第１循環ポンプ１２とを備えている。第１流路部位１１には、冷熱源１をバイパスさせる第１バイパス部位１３と、氷蓄熱槽２をバイパスさせる第２バイパス部位１４と、第１熱交換部５をバイパスさせる第３バイパス部位１５との３つのバイパス部位の夫々が分岐合流接続されている。各バイパス部位１３、１４、１５の分岐箇所には、図示は省略するが、三方弁等の切換弁が備えられており、この切換弁を切り換えることで、冷熱源１と氷蓄熱槽２と第１熱交換部５のうち、第１熱搬送流体Ｎ１を通流させる機器を選択できるようになっている。第１循環ポンプ１２は、第１流路部位１１において第２バイパス部位１４の合流箇所と第１バイパス部位１３の分岐箇所との間の部位に配置されている。 The first circulation circuit 10 includes a first flow passage portion 11 capable of circulating the first heat transfer fluid N1 in the order of the cold heat source 1, the inside of the heat transfer pipe 2a in the ice heat storage tank 2, and the first heat exchange unit 5; 1) A first circulation pump 12 is provided to circulate the heat transfer fluid N1. In the first flow passage portion 11, a first bypass portion 13 for bypassing the cold heat source 1, a second bypass portion 14 for bypassing the ice storage tank 2, and a third bypass portion 15 for bypassing the first heat exchange portion 5. Each of the three bypass sites is connected by branching and joining. Although not shown, a switching valve such as a three-way valve is provided at a branch point of each bypass portion 13, 14, 15, and the cold heat source 1, ice heat storage tank 2, and Among the first heat exchange units 5, an apparatus through which the first heat transfer fluid N1 flows can be selected. The first circulation pump 12 is disposed at a portion between the joining portion of the second bypass portion 14 and the branch portion of the first bypass portion 13 in the first flow passage portion 11.

第２熱搬送流体Ｎ２についての構成として、第２熱搬送流体Ｎ２と放熱対象流体Ｈを熱交換させる第２熱交換部６と、氷蓄熱槽２と第１熱交換部５と第２熱交換部６のうち、第２熱搬送流体Ｎ２を通流させる機器を選択自在で第２熱搬送流体Ｎ２を循環させる第２循環回路２０とが備えられている。 As a configuration for the second heat transfer fluid N2, the second heat exchange unit 6 that exchanges heat between the second heat transfer fluid N2 and the fluid H to be dissipated, the ice heat storage tank 2, the first heat exchange unit 5, and the second heat exchange The second circulation circuit 20 for circulating the second heat transfer fluid N2 is provided by selecting an apparatus through which the second heat transfer fluid N2 flows in the section 6.

第２循環回路２０は、氷蓄熱槽２における伝熱管２ａの外部、第２熱交換部６、第１熱交換部５の順で第２熱搬送流体Ｎ２を循環自在な第２流路部位２１と、第２熱搬送流体Ｎ２を循環通流させる第２循環ポンプ２２とを備えている。第２流路部位２１には、第１熱交換部５をバイパスさせる第４バイパス部位２３が分岐合流接続されている。この第４バイパス部位２３の分岐箇所には、図示は省略するが、三方弁等の切換弁が備えられており、この切換弁を切り換えることで、第１熱交換部５に第２熱搬送流体Ｎ２を通流させるか否かを選択できるようになっている。第２循環ポンプ２２は、第２流路部位２１において氷蓄熱槽２と第２熱交換部６の間の部位に配置されている。 The second circulation circuit 20 is a second flow passage portion 21 capable of circulating the second heat transfer fluid N2 in the order of the second heat exchange portion 6 and the first heat exchange portion 5 outside the heat transfer pipe 2a in the ice heat storage tank 2. And a second circulation pump 22 that circulates the second heat transfer fluid N2. A fourth bypass portion 23 for bypassing the first heat exchange unit 5 is bifurcatedly connected to the second flow passage portion 21. Although not shown, a switch valve such as a three-way valve is provided at a branch point of the fourth bypass portion 23, and the second heat transfer fluid is transferred to the first heat exchange unit 5 by switching the switch valve. It is possible to select whether to let N2 flow or not. The second circulation pump 22 is disposed at a portion between the ice heat storage tank 2 and the second heat exchange unit 6 in the second flow passage portion 21.

放熱対象流体Ｈについての構成として、第２熱交換部６を通過した放熱対象流体Ｈを空調装置３１に供給する空調側回路３０が備えられている。この空調側回路３０は、図示は省略するが、例えば、第２熱交換部６を通過した放熱対象流体Ｈを複数の空調装置３１に分配供給し、複数の空調装置３１の夫々を通過した放熱対象流体Ｈを合流させて第２熱交換部６に供給する循環回路として構成することができる。空調装置３１については、例えば、供給される放熱対象流体Ｈを通流させるコイルと、そのコイルに空調用空気を供給するファンとを有するファンコイルユニットを用いることができ、コイルにて空調された空調用空気を空調対象空間に供給するようにしている。 As a configuration for the heat radiation target fluid H, an air conditioning side circuit 30 that supplies the heat radiation target fluid H that has passed through the second heat exchange unit 6 to the air conditioner 31 is provided. Although not shown, the air conditioning side circuit 30 distributes and supplies the heat radiation target fluid H that has passed through the second heat exchange unit 6 to the plurality of air conditioners 31, and the heat radiation that has passed through each of the plurality of air conditioners 31. The target fluid H can be combined and configured as a circulation circuit to be supplied to the second heat exchange unit 6. For the air conditioner 31, for example, a fan coil unit having a coil for flowing the fluid H to be radiated and a fan for supplying air conditioning air to the coil can be used, and the air conditioning is performed by the coil Air conditioning air is supplied to the air conditioning target space.

図示のものでは、空調装置３１からの戻り側の放熱対象流体Ｈをそのまま第２熱交換部６に供給するようにしているが、例えば、図示は省略するが、空調側回路３０には、放熱対象流体Ｈの通流方向で第２熱交換部６よりも上流側に補助の冷熱源を備え、その補助の冷熱源にて第２熱交換部６に供給する前の放熱対象流体Ｈを冷却し、その冷却後の放熱対象流体Ｈを第２熱交換部６に供給することもできる。 In the illustrated embodiment, the fluid H to be dissipated on the return side from the air conditioner 31 is supplied as it is to the second heat exchange unit 6, but for example, although not shown, the air conditioning circuit 30 dissipates heat. An auxiliary cold heat source is provided upstream of the second heat exchange section 6 in the flow direction of the target fluid H, and the auxiliary heat source cools the fluid H to be dissipated before being supplied to the second heat exchange section 6 Alternatively, the fluid H to be dissipated after cooling can be supplied to the second heat exchange unit 6.

蓄熱部７は、第１循環回路１０において第１熱搬送流体Ｎ１を通流させる機器を切り換えることで、蓄熱運転を行うように構成されている。図１に示すように、蓄熱運転では、蓄熱部７が、冷熱源１と氷蓄熱槽２の間で第１熱搬送流体Ｎ１を循環させる状態に第１循環回路１０を切り換えている。つまり、第１循環回路１０では、第３バイパス部位１５により第１熱交換部５をバイパスする状態で第１流路部位１１にて冷熱源１と氷蓄熱槽２の間で第１熱搬送流体Ｎ１を循環させている。これにより、冷熱源１の冷熱を有する第１熱搬送流体Ｎ１を氷蓄熱槽２の伝熱管２ａに供給して、その伝熱管２ａの周囲に氷を製氷している。 The heat storage unit 7 is configured to perform a heat storage operation by switching an apparatus through which the first heat transfer fluid N <b> 1 flows in the first circulation circuit 10. As shown in FIG. 1, in the heat storage operation, the heat storage unit 7 switches the first circulation circuit 10 to a state in which the first heat transfer fluid N1 is circulated between the cold heat source 1 and the ice heat storage tank 2. That is, in the first circulation circuit 10, the first heat transfer fluid is placed between the cold heat source 1 and the ice heat storage tank 2 at the first flow passage portion 11 in a state of bypassing the first heat exchange unit 5 by the third bypass portion 15. It is circulating N1. Thereby, the first heat transfer fluid N1 having the cold heat of the cold heat source 1 is supplied to the heat transfer pipe 2a of the ice heat storage tank 2, and ice is produced around the heat transfer pipe 2a.

放熱部３の放熱運転としては、放熱部３が第１循環回路１０及び第２循環回路２０において熱搬送流体Ｎ１、Ｎ２を通流させる機器を切り換えることで、第１運転モードと第２運転モードの一方及び両方の運転モードを実行可能に構成されている。第１運転モードは、所謂内融式であり、図４に示すように、氷蓄熱槽２における伝熱管２ａの内部に第１熱搬送流体Ｎ１を供給してその伝熱管２ａの内側から氷を融解させて取り出した冷熱を放熱対象流体Ｈに放熱させている。第２運転モードは、所謂外融式であり、図２に示すように、氷蓄熱槽２における伝熱管２ａの外側に第２熱搬送流体Ｎ２を供給して氷を外側から融解させて取り出した冷熱を放熱対象流体Ｈに放熱させている。 As the heat release operation of the heat release unit 3, the first operation mode and the second operation mode are performed by switching the devices through which the heat transfer fluid N1, N2 flows in the first circulation circuit 10 and the second circulation circuit 20 as the heat dissipation unit 3 One or both of the operation modes are configured to be executable. The first operation mode is a so-called internal melting type, and as shown in FIG. 4, the first heat transfer fluid N1 is supplied to the inside of the heat transfer tube 2a in the ice storage tank 2 and ice is supplied from the inside of the heat transfer tube 2a. The cold heat that has been melted and taken out is dissipated to the fluid H to be dissipated. The second operation mode is a so-called external melting type, and as shown in FIG. 2, the second heat transfer fluid N2 is supplied to the outside of the heat transfer pipe 2a in the ice storage tank 2 to melt ice from the outside and take it out The cold heat is dissipated to the fluid H to be dissipated.

第１運転モードでは、図４に示すように、放熱部３が、氷蓄熱槽２と第１熱交換部５の間で第１熱搬送流体Ｎ１を循環させる状態に第１循環回路１０を切り換え、且つ、氷蓄熱槽２と第１熱交換部５と第２熱交換部６の間で第２熱搬送流体Ｎ２を循環させる状態に第２循環回路２０を切り換えている。つまり、第１循環回路１０では、第１バイパス部位１３により冷熱源１をバイパスする状態で第１流路部位１１にて氷蓄熱槽２と第１熱交換部５の間で第１熱搬送流体Ｎ１を循環させている。第２循環回路２０では、第４バイパス部位２３に通流させずに第２流路部位２１にて氷蓄熱槽２と第１熱交換部５と第２熱交換部６の間で第２熱搬送流体Ｎ２を循環させている。これにより、氷蓄熱槽２の冷熱を第１熱搬送流体Ｎ１にて取り出し、その第１熱搬送流体Ｎ１によって第１熱交換部５において第２熱搬送流体Ｎ２を冷却し、その冷却された第２熱搬送流体Ｎ２によって第２熱交換部６において放熱対象流体Ｈを冷却している。 In the first operation mode, as shown in FIG. 4, the heat dissipation unit 3 switches the first circulation circuit 10 to a state in which the first heat transfer fluid N1 is circulated between the ice heat storage tank 2 and the first heat exchange unit 5 The second circulation circuit 20 is switched to a state in which the second heat transfer fluid N2 is circulated among the ice heat storage tank 2, the first heat exchange unit 5, and the second heat exchange unit 6. That is, in the first circulation circuit 10, the first heat transfer fluid is transferred between the ice heat storage tank 2 and the first heat exchange portion 5 in the first flow passage portion 11 in a state where the cold heat source 1 is bypassed by the first bypass portion 13. It is circulating N1. In the second circulation circuit 20, the second heat is generated between the ice heat storage tank 2, the first heat exchange unit 5, and the second heat exchange unit 6 in the second flow passage section 21 without flowing into the fourth bypass section 23. The carrier fluid N2 is circulated. Thereby, the cold heat of the ice heat storage tank 2 is taken out by the first heat transfer fluid N1, and the second heat transfer fluid N2 is cooled in the first heat exchange unit 5 by the first heat transfer fluid N1. The heat transfer target fluid H is cooled in the second heat exchange unit 6 by the two heat transfer fluids N2.

第２運転モードでは、図２に示すように、放熱部３が、氷蓄熱槽２と第２熱交換部６の間で第２熱搬送流体Ｎ２を循環させる状態に第２循環回路２０を切り換えている。つまり、第２循環回路２０では、第４バイパス部位２３により第１熱交換部５をバイパスする状態で第２流路部位２１にて氷蓄熱槽２と第２熱交換部６の間で第２熱搬送流体Ｎ２を循環させている。これにより、第２運転モードでは、氷蓄熱槽２の冷熱を第２熱搬送流体Ｎ２にて取り出し、その第２熱搬送流体Ｎ２によって第２熱交換部６において放熱対象流体Ｈを冷却している。 In the second operation mode, as shown in FIG. 2, the heat dissipation unit 3 switches the second circulation circuit 20 to a state in which the second heat transfer fluid N2 is circulated between the ice heat storage tank 2 and the second heat exchange unit 6 ing. That is, in the second circulation circuit 20, the second heat exchange portion 6 is disposed between the ice heat storage tank 2 and the second heat exchange portion 6 in the second flow path portion 21 in a state where the first heat exchange portion 5 is bypassed by the fourth bypass portion 23. The heat transfer fluid N2 is circulated. Thereby, in the second operation mode, the cold heat of the ice heat storage tank 2 is taken out by the second heat transfer fluid N2, and the heat radiation target fluid H is cooled in the second heat exchange unit 6 by the second heat transfer fluid N2. .

付加放熱部４の付加放熱運転においても、図３に示すように、付加放熱部４が、冷熱源１と第１熱交換部５の間で第１熱搬送流体Ｎ１を循環させる状態に第１循環回路１０を切り換え、且つ、氷蓄熱槽２と第１熱交換部５と第２熱交換部６の間で第２熱搬送流体Ｎ２を循環させる状態に第２循環回路２０を切り換えている。つまり、第１循環回路１０では、第２バイパス部位１４により氷蓄熱槽２をバイパスする状態で第１流路部位１１にて冷熱源１と第１熱交換部５の間で第１熱搬送流体Ｎ１を循環させている。第２循環回路２０では、第４バイパス部位２３に通流させずに第２流路部位２１にて氷蓄熱槽２と第１熱交換部５と第２熱交換部６の間で第２熱搬送流体Ｎ２を循環させている。これにより、冷熱源１の冷熱を有する第１熱搬送流体Ｎ１によって第１熱交換部５において第２熱搬送流体Ｎ２を冷却し、その冷却された第２熱搬送流体Ｎ２によって第２熱交換部６において放熱対象流体Ｈを冷却している。 Also in the additional heat dissipation operation of the additional heat dissipation part 4, as shown in FIG. 3, the additional heat dissipation part 4 causes the first heat transfer fluid N1 to circulate between the cold heat source 1 and the first heat exchange part 5 The circulation circuit 10 is switched, and the second circulation circuit 20 is switched to a state in which the second heat transfer fluid N2 is circulated among the ice heat storage tank 2, the first heat exchange unit 5, and the second heat exchange unit 6. That is, in the first circulation circuit 10, the first heat transfer fluid is interposed between the cold heat source 1 and the first heat exchange portion 5 in the first flow passage portion 11 in a state of bypassing the ice storage tank 2 by the second bypass portion 14. It is circulating N1. In the second circulation circuit 20, the second heat is generated between the ice heat storage tank 2, the first heat exchange unit 5, and the second heat exchange unit 6 in the second flow passage section 21 without flowing into the fourth bypass section 23. The carrier fluid N2 is circulated. Thereby, the second heat transfer fluid N2 is cooled in the first heat exchange unit 5 by the first heat transfer fluid N1 having the cold energy of the cold heat source 1, and the second heat transfer unit is cooled by the cooled second heat transfer fluid N2. At 6 the fluid H to be dissipated is cooled.

このように、第１循環回路１０及び第２循環回路２０において熱搬送流体Ｎ１、Ｎ２を通流させる機器を切り換えるだけで、放熱部３による第１運転モードと第２運転モードの切り換えだけでなく、付加放熱部４による付加放熱運転、及び、蓄熱部７による蓄熱運転にも切り換えることができる。これにより、第１熱搬送流体Ｎ１を通流させる第１循環回路１０、及び、第２熱搬送流体Ｎ２を通流させる第２循環回路２０を備えるという回路構成として簡易な構成を採用しがら、蓄熱運転、放熱運転、及び、付加放熱運転の夫々を適切に行うことができる。 As described above, switching of the heat transfer fluid N1 and N2 in the first circulation circuit 10 and the second circulation circuit 20 merely switches the first operation mode and the second operation mode by the heat dissipation unit 3 as well as switching the first operation mode and the second operation mode. It is possible to switch between the additional heat dissipation operation by the additional heat dissipation unit 4 and the heat storage operation by the heat storage unit 7. Thus, a simple configuration is adopted as a circuit configuration including the first circulation circuit 10 that allows the first heat transfer fluid N1 to flow and the second circulation circuit 20 that allows the second heat transfer fluid N2 to flow, Each of the heat storage operation, the heat release operation, and the additional heat release operation can be appropriately performed.

氷蓄熱システム１００には、蓄熱部７、放熱部３、及び、付加放熱部４の運転を制御する運転制御部４０が備えられている。運転制御部４０は、蓄熱用設定条件が満たされていると判別すると、図１に示すように、蓄熱部７による蓄熱運転を行うようにしている。この蓄熱運転では、例えば、冷熱源１を通過した第１熱搬送流体Ｎ１の温度が蓄熱用設定温度（例えば、−３℃）になるように冷熱源１にて与える冷熱量を調整しており、その蓄熱用設定温度の第１熱搬送流体Ｎ１が伝熱管２ａに供給されて、その伝熱管２ａの周囲に製氷されている。蓄熱用設定条件をどのような条件に設定するかは適宜変更が可能であるが、例えば、夜間の時間帯となった場合に、その蓄熱用設定条件が満たされるように時間帯に応じて設定することができる。また、人為操作式のスイッチのＯＮ操作等、人為的な蓄熱運転の要求があった場合にも、蓄熱用設定条件が満たされるように設定することもできる。 The ice heat storage system 100 is provided with a heat storage unit 7, a heat radiating unit 3, and an operation control unit 40 that controls the operation of the additional heat radiating unit 4. When the operation control unit 40 determines that the heat storage setting condition is satisfied, as shown in FIG. 1, the heat storage operation by the heat storage unit 7 is performed. In this heat storage operation, for example, the amount of cold heat given by the cold heat source 1 is adjusted so that the temperature of the first heat transfer fluid N1 that has passed through the cold heat source 1 becomes the heat storage setting temperature (for example, -3.degree. C.) The first heat transfer fluid N1 having the heat storage setting temperature is supplied to the heat transfer tube 2a, and ice is produced around the heat transfer tube 2a. The conditions for setting the heat storage setting condition can be changed as appropriate, but for example, when the night time zone is reached, the setting is made according to the time zone so that the heat storage setting condition is satisfied. can do. Further, the setting condition for heat storage can be set to be satisfied also when there is a request for artificial heat storage operation, such as an ON operation of a manual operation type switch.

運転制御部４０は、空調装置３１が運転中であるか否かを監視しており、図２に示すように、空調装置３１の運転中には放熱部３による第２運転モードでの放熱運転を行うようにしている。この第２運転モードの放熱運転における流体の温度変化について説明すると、例えば、氷蓄熱槽２から取り出された第２熱搬送流体Ｎ２の温度が１℃となり、第２熱交換部６に供給される放熱対象流体Ｈの温度が１２．５℃となっている。そして、第２熱交換部６での熱交換によって、第２熱交換部６を通過した第２熱搬送流体Ｎ２の温度が１１．５℃に上昇し、第２熱交換部６を通過した放熱対象流体Ｈの温度が７℃に低下する。これにより、空調装置３１には、十分に低温の７℃の放熱対象流体Ｈが供給され、冷房を適切に行うことができる。 The operation control unit 40 monitors whether or not the air conditioner 31 is operating, and as shown in FIG. 2, the heat dissipation operation in the second operation mode by the heat dissipation unit 3 is performed while the air conditioner 31 is in operation. To do. The temperature change of the fluid in the heat release operation in the second operation mode will be described. For example, the temperature of the second heat transfer fluid N2 taken out of the ice heat storage tank 2 becomes 1 ° C. and supplied to the second heat exchange unit 6 The temperature of the fluid H to be dissipated is 12.5 ° C. Then, the temperature of the second heat transfer fluid N2 that has passed through the second heat exchange unit 6 is raised to 11.5 ° C. by heat exchange in the second heat exchange unit 6, and heat radiation that has passed through the second heat exchange unit 6 The temperature of the target fluid H drops to 7 ° C. As a result, the fluid H to be radiated at a sufficiently low temperature of 7 ° C. is supplied to the air conditioner 31 so that cooling can be properly performed.

運転制御部４０は、放熱部３による第２運転モードでの放熱運転を行っている場合（図２参照）に、付加用設定条件が満たされると、図３に示すように、その放熱部３による第２運転モードでの放熱運転に加えて、付加放熱部４による付加放熱運転を行うようにしている。付加用設定条件は、空調装置３１における空調負荷が設定負荷よりも大きくなると、その付加用設定条件が満たされるように設定されている。 The operation control unit 40 performs the heat radiation operation in the second operation mode by the heat radiation unit 3 (see FIG. 2), and when the setting condition for addition is satisfied, as shown in FIG. In addition to the heat dissipation operation in the second operation mode according to the above, the additional heat dissipation operation by the additional heat dissipation unit 4 is performed. The setting condition for addition is set so that the setting condition for addition is satisfied when the air conditioning load in the air conditioner 31 becomes larger than the setting load.

このようにして、運転制御部４０は、空調装置３１の運転に伴って放熱部３による第２運転モードでの放熱運転を行い、空調装置３１における空調負荷が設定負荷よりも大きいか否かを判別している。そして、運転制御部４０は、空調装置３１における空調負荷が設定負荷以下であると、放熱部３による第２運転モードでの放熱運転を行っている状態を継続し、空調装置３１における空調負荷が設定負荷よりも大きくなると、放熱部３による第２運転モードでの放熱運転に加えて、付加放熱部４による付加放熱運転を行う。 In this manner, the operation control unit 40 performs the heat release operation in the second operation mode by the heat release unit 3 along with the operation of the air conditioner 31, and determines whether the air conditioning load in the air conditioner 31 is larger than the set load. It is determined. Then, if the air conditioning load in the air conditioner 31 is equal to or less than the set load, the operation control unit 40 continues the state of performing the heat dissipation operation in the second operation mode by the heat dissipation unit 3, and the air conditioning load in the air conditioner 31 When the load is larger than the set load, in addition to the heat dissipation operation in the second operation mode by the heat dissipation unit 3, the additional heat dissipation operation by the additional heat dissipation unit 4 is performed.

第２運転モードの放熱運転と付加放熱運転の同時運転における流体の温度変化について説明する。例えば、氷蓄熱槽２から取り出された第２熱搬送流体Ｎ２の温度が１℃となり、第２熱交換部６に供給される放熱対象流体Ｈの温度が１２．５℃となっている。そして、第２熱交換部６での熱交換によって、第２熱交換部６を通過した第２熱搬送流体Ｎ２の温度が１１．５℃に上昇し、第２熱交換部６を通過した放熱対象流体Ｈの温度が７℃に低下する。これにより、空調装置３１には、十分に低温の７℃の放熱対象流体Ｈが供給され、冷房を適切に行うことができる。また、１１．５℃の第２熱搬送流体Ｎ２は、そのまま氷蓄熱槽２に戻されるのではなく、第１熱交換部５での熱交換によって、５℃の第１熱搬送流体Ｎ１にて６℃まで低下され、その６℃の第２熱搬送流体Ｎ２が氷蓄熱槽２に戻され、氷蓄熱槽２の氷の融解が早まるのを抑制できる。ここで、冷熱源１は、冷熱源１を通過した第１熱搬送流体Ｎ１の温度が蓄熱用設定温度（例えば、−３℃）よりも高温の付加設定温度（例えば、５℃）になるように冷熱源１にて与える冷熱量を調整している。 The temperature change of the fluid in the simultaneous operation of the heat release operation of the second operation mode and the additional heat release operation will be described. For example, the temperature of the second heat transfer fluid N2 extracted from the ice heat storage tank 2 is 1 ° C., and the temperature of the fluid H to be radiated supplied to the second heat exchange unit 6 is 12.5 ° C. Then, the temperature of the second heat transfer fluid N2 that has passed through the second heat exchange unit 6 is raised to 11.5 ° C. by heat exchange in the second heat exchange unit 6, and heat radiation that has passed through the second heat exchange unit 6 The temperature of the target fluid H drops to 7 ° C. As a result, the fluid H to be radiated at a sufficiently low temperature of 7 ° C. is supplied to the air conditioner 31 so that cooling can be properly performed. Further, the second heat transfer fluid N2 at 11.5 ° C. is not returned to the ice heat storage tank 2 as it is, but by the heat exchange in the first heat exchange unit 5, the first heat transfer fluid N1 at 5 ° C. The temperature is lowered to 6 ° C., and the second heat transfer fluid N2 at 6 ° C. is returned to the ice heat storage tank 2, and it is possible to suppress premature melting of ice in the ice heat storage tank 2. Here, in the cold heat source 1, the temperature of the first heat transfer fluid N1 that has passed through the cold heat source 1 becomes an additional setting temperature (e.g., 5 ° C.) higher than the heat storage setting temperature (e.g., −3 ° C.) The amount of cold heat given by the cold heat source 1 is adjusted.

運転制御部４０は、放熱部３による第２運転モードでの放熱運転に加えて、付加放熱部４による付加放熱運転を行っている場合（図３参照）に、第１運転切換条件が満たされると、図４に示すように、付加放熱部４による付加放熱運転を運転停止し、放熱部３による第１運転モードと第２運転モードの両方の運転モードでの放熱運転を行うようにしている。 The operation control unit 40 satisfies the first operation switching condition when the additional heat dissipation operation by the additional heat dissipation unit 4 is performed in addition to the heat dissipation operation in the second operation mode by the heat dissipation unit 3 (see FIG. 3) And, as shown in FIG. 4, the additional heat dissipation operation by the additional heat dissipation unit 4 is stopped, and the heat dissipation operation is performed in both the first operation mode and the second operation mode by the heat dissipation unit 3 .

この両方の運転モードでの放熱運転における流体の温度変化について説明する。例えば、氷蓄熱槽２から取り出された第２熱搬送流体Ｎ２の温度が１℃となり、第２熱交換部６に供給される放熱対象流体Ｈの温度が１２．５℃となっている。そして、第２熱交換部６での熱交換によって、第２熱交換部６を通過した第２熱搬送流体Ｎ２の温度が１１．５℃に上昇し、第２熱交換部６を通過した放熱対象流体Ｈの温度が７℃に低下する。これにより、空調装置３１には、十分に低温の７℃の放熱対象流体Ｈが供給され、冷房を適切に行うことができる。また、１１．５℃の第２熱搬送流体Ｎ２は、そのまま氷蓄熱槽２に戻されるのではなく、第１熱交換部５での熱交換によって、５℃の第１熱搬送流体Ｎ１にて６℃まで低下され、その６℃の第２熱搬送流体Ｎ２が氷蓄熱槽２に戻され、氷蓄熱槽２の氷の融解が早まるのを抑制できる。 The temperature change of the fluid in the heat release operation in both operation modes will be described. For example, the temperature of the second heat transfer fluid N2 extracted from the ice heat storage tank 2 is 1 ° C., and the temperature of the fluid H to be radiated supplied to the second heat exchange unit 6 is 12.5 ° C. Then, the temperature of the second heat transfer fluid N2 that has passed through the second heat exchange unit 6 is raised to 11.5 ° C. by heat exchange in the second heat exchange unit 6, and heat radiation that has passed through the second heat exchange unit 6 The temperature of the target fluid H drops to 7 ° C. As a result, the fluid H to be radiated at a sufficiently low temperature of 7 ° C. is supplied to the air conditioner 31 so that cooling can be properly performed. Further, the second heat transfer fluid N2 at 11.5 ° C. is not returned to the ice heat storage tank 2 as it is, but by the heat exchange in the first heat exchange unit 5, the first heat transfer fluid N1 at 5 ° C. The temperature is lowered to 6 ° C., and the second heat transfer fluid N2 at 6 ° C. is returned to the ice heat storage tank 2, and it is possible to suppress premature melting of ice in the ice heat storage tank 2.

第１運転切換条件について説明を加える。図５に示すように、例えば、氷蓄熱システム１００を有する施設２００及びその施設２００の周辺地域Ｒ１を含めたエリアを特定エリアＲ２としており、第１運転切換条件は、その特定エリアＲ２における消費電力量が設定電力量を超えることが予想されるタイミングとなる条件に設定されている。この実施形態では、例えば、複数の店舗を有する商業施設等の大型施設２００に氷蓄熱システム１００を備えており、その大型施設２００とその大型施設２００の周辺の住居や施設を含む周辺地域Ｒ１を１つの特定エリアＲ２としている。どれだけの広さの地域を特定エリアＲ２とするかについては、例えば、電力会社からどのようなエリアを１つの供給範囲として電力供給を行っているかに基づいて設定することができる。また、特定エリアＲ２については、施設２００を含むエリアであればよく、施設２００とその施設２００とは離れたエリアとを特定エリアＲ２とすることもでき、施設２００とその施設２００に隣接するエリアに限るものではない。 A description of the first operation switching condition will be added. As shown in FIG. 5, for example, an area including the facility 200 having the ice storage system 100 and the peripheral area R1 of the facility 200 is defined as a specific area R2, and the first operation switching condition is the power consumption in the specific area R2. The condition is set to be a timing at which the amount is expected to exceed the set power amount. In this embodiment, for example, the ice thermal storage system 100 is provided in a large facility 200 such as a commercial facility having a plurality of stores, and the surrounding area R1 including the large facility 200 and houses and facilities around the large facility 200 is provided. It is considered as one specific area R2. About how large the area is set as the specific area R2, for example, it can be set based on what area is supplied from the power company as one supply range. In addition, the specific area R2 may be an area including the facility 200, and the facility 200 and an area away from the facility 200 may be set as the specific area R2, and the facility 200 and an area adjacent to the facility 200. It is not limited to

ここで、設定電力量は、特定エリアＲ２を対象とするデマンドレスポンス対応として、その特定エリアＲ２に対して供給可能な電力量を基準として設定することができる。また、特定エリアＲ２を対象とするデマンドレスポンス対応として、消費電力の目標削減量が設定されている場合には、現在の消費電力量から目標削減量だけ減算した電力量等、現在の消費電力量と目標削減量に基づいて設定することもできる。 Here, the set power amount can be set on the basis of the amount of power that can be supplied to the specific area R2 as the demand response to the specific area R2. In addition, when the target reduction amount of power consumption is set as the demand response corresponding to the specific area R2, the current power consumption amount such as the power amount obtained by subtracting the target reduction amount from the current power consumption amount And can be set based on the target reduction amount.

氷蓄熱システム１００には、特定エリアＲ２における消費電力量が設定電力量を超えると予測される逼迫要求Ｔを電力会社等の外部Ｇから受ける受信部４１が備えられており、その受信部４１にて受ける逼迫要求Ｔに基づいて、第１運転切換条件が満たされるか否かが判別されている。 The ice heat storage system 100 is provided with a receiving unit 41 that receives from the external company G such as a power company a stress request T for which the power consumption in the specific area R2 is predicted to exceed the set power, and the receiving unit 41 Whether or not the first operation switching condition is satisfied is determined based on the stress request T received.

特定エリアＲ２における消費電力量が設定電力量を超えると予測される場合には、電力会社等の外部Ｇから氷蓄熱システム１００に逼迫要求Ｔが送信される。この逼迫要求Ｔには、例えば、特定エリアＲ２における消費電力量が設定電力量を超えると予測される逼迫時間帯と、その消費電力の削減目標量等の各種の情報が含まれている。氷蓄熱システム１００では、その逼迫要求Ｔを受信部４１にて受信すると、逼迫要求Ｔに含まれた逼迫時間帯になると第１運転切換条件が満たされたとして、付加放熱部４による付加放熱運転を運転停止し、放熱部３による第１運転モードと第２運転モードの両方の運転モードでの放熱運転を行うようにしている。そして、逼迫時間帯の間は、図４に示すように、放熱部３による第１運転モードと第２運転モードの両方の運転モードでの放熱運転を行い、逼迫時間帯から外れると、図３に示すように、放熱部３による第２運転モードでの放熱運転と付加放熱部４による付加放熱運転を行う状態に運転を切り換えている。 When it is predicted that the power consumption in the specific area R2 exceeds the set power, a stress request T is transmitted from the outside G such as a power company to the ice storage system 100. The tightness demand T includes, for example, various kinds of information such as a tightness time zone in which the power consumption in the specific area R2 is predicted to exceed the set power, and a reduction target amount of the power consumption. In the ice heat storage system 100, when the stress request T is received by the receiving unit 41, it is determined that the first operation switching condition is satisfied when the stress time zone included in the stress request T is reached. And the heat dissipation operation in both the first operation mode and the second operation mode by the heat dissipation unit 3 is performed. Then, during the pressing time zone, as shown in FIG. 4, the heat radiating operation in both the first and second driving modes by the heat radiating portion 3 is performed, and when it is out of the pressing time zone, as shown in FIG. As shown in FIG. 4, the operation is switched to a state in which the heat dissipation operation in the second operation mode by the heat dissipation unit 3 and the additional heat dissipation operation by the additional heat dissipation unit 4 are performed.

また、逼迫要求Ｔに逼迫時間帯が含まれていない場合でも、例えば、逼迫要求Ｔを受信部４１にて受信した時点を基準として、その受信時点から設定時間の間を逼迫時間帯として設定することで、第１運転切換条件を満たしているか否かの判別を行うことができる。 In addition, even if the tightness request T does not include the tightness time zone, for example, based on the time when the tightness request T is received by the receiving unit 41, the time interval from the time of reception is set as the tightness time zone. Thus, it can be determined whether or not the first operation switching condition is satisfied.

ここで、第１運転切換条件を満たしているか否かの判別、及び、それに伴う放熱部３による第１運転モードと第２運転モードの両方の運転モードでの放熱運転を行う状態への運転切換については、例えば、受信部４１にて逼迫要求Ｔを受信すると、運転制御部４０が、自動的に、第１運転切換条件が満たされたか否かの判別を行い、それに伴う運転切換についても運転制御部４０が自動的に行うことができる。これに加えて又はこれに代えて、受信部４１にて逼迫要求Ｔを受信すると、氷蓄熱システム１００の管理者等が、第１運転切換条件が満たされたか否かを判別し、それに伴う運転切換についても、管理者等が運転切換を行うための運転切換指令を運転制御部４０に与えることができる。 Here, it is determined whether or not the first operation switching condition is satisfied, and the operation switching to a state in which the heat dissipation operation is performed in both the first operation mode and the second operation mode by the heat dissipation unit 3 accordingly For example, when the tightness request T is received by the reception unit 41, the operation control unit 40 automatically determines whether the first operation switching condition is satisfied, and the operation switching is also performed accordingly. The control unit 40 can do this automatically. In addition to or instead of this, when the stress request T is received by the reception unit 41, the administrator of the ice heat storage system 100 determines whether the first operation switching condition is satisfied, and the operation associated therewith Also for the switching, an operation switching instruction can be given to the operation control unit 40 for the administrator or the like to perform the operation switching.

このようにして、氷蓄熱システム１００では、電力会社等の外部Ｇからの逼迫要求Ｔに応じて、付加放熱部４による付加放熱運転を運転停止させ、放熱部３による第１運転モードと第２運転モードの両方の運転モードでの放熱運転を行う状態に運転切換を行うことで、空調装置３１の空調負荷に対応した冷房を行いながら、消費電力の削減を図ることができる。外部Ｇからの逼迫要求Ｔは、特定エリアＲ２における消費電力量が設定電力量を超えると予測される場合に送信されることから、その特定エリアＲ２を対象とするエリアデマンドレスポンス対応として、最適なタイミングにて消費電力の削減を図ることができる。例えば、複数の店舗を有する商業施設等の大型施設２００に氷蓄熱システム１００を備えている場合には、特定エリアＲ２全体での消費電力に対して、この氷蓄熱システム１００の消費電力が占める割合が大きいことから、氷蓄熱システム１００の消費電力を適切なタイミングで削減することで、特定エリアＲ２を対象とするエリアデマンドレスポンス対応を効果的に実現することができる。 In this manner, in the ice heat storage system 100, the additional heat dissipation operation by the additional heat dissipation unit 4 is stopped in response to the stress request T from the outside G such as a power company, and the first operation mode and the second By switching the operation to a state in which the heat release operation is performed in both operation modes of the operation mode, it is possible to reduce power consumption while performing cooling corresponding to the air conditioning load of the air conditioner 31. The stress request T from the external G is transmitted when the power consumption in the specific area R2 is predicted to exceed the set power, and therefore, it is optimal as an area demand response response for the specific area R2 Power consumption can be reduced at timing. For example, when the ice storage system 100 is provided in a large facility 200 such as a commercial facility having a plurality of stores, the ratio of the power consumption of the ice storage system 100 to the power consumption of the entire specific area R2 By reducing the power consumption of the ice heat storage system 100 at an appropriate timing, it is possible to effectively realize area demand response response for the specific area R2.

また、氷蓄熱システム１００では、電力会社等の外部Ｇからの逼迫要求Ｔに応じて、付加放熱部４による付加放熱運転を運転停止させ、放熱部３による第１運転モードと第２運転モードの両方の運転モードでの放熱運転を行う状態に運転切換を行うときに、周辺地域Ｒ１に対して施設２００への来店を促す来店促進情報を発信することができる。このような発信を行い、周辺地域Ｒ１の居住者が施設２００に来店することで、周辺地域Ｒ１の住居や施設における消費電力の削減も図ることができ、エリアデマンドレスポンス対応の実現に有用なものとなる。 In addition, in the ice heat storage system 100, the additional heat dissipation operation by the additional heat dissipation unit 4 is stopped in response to the stress request T from the outside G of the electric power company or the like, and the first operation mode and the second operation mode by the heat dissipation unit 3 are When performing operation switching to the state which performs the thermal radiation operation in both operation modes, the visit promotion information which urges visit to the facility 200 can be transmitted with respect to surrounding area R1. By making such a transmission and residents of the surrounding area R1 visiting the facility 200, it is possible to reduce the power consumption in the residences and facilities of the surrounding area R1, and it is useful for realizing area demand response. It becomes.

〔別実施形態〕
（１）上記実施形態では、第１熱交換部５が、第２循環回路２０において第２熱搬送流体の通流方向で氷蓄熱槽２の手前に配置されて、第１熱搬送流体と氷蓄熱槽２に供給される前の第２熱搬送流体を熱交換させている。これに代えて、図６に示すように、第１熱交換部５を、空調側回路３０において放熱対象流体Ｈの通流方向で第２熱交換部６の手前に配置し、第１熱搬送流体と第２熱交換部６に供給される前の第２熱搬送流体を熱交換させることもできる。 [Another embodiment]
(1) In the above embodiment, the first heat exchange unit 5 is disposed in front of the ice heat storage tank 2 in the flow direction of the second heat transfer fluid in the second circulation circuit 20, and the first heat transfer fluid and ice are The second heat transfer fluid before being supplied to the heat storage tank 2 is subjected to heat exchange. Instead of this, as shown in FIG. 6, the first heat exchange unit 5 is disposed in front of the second heat exchange unit 6 in the flow direction of the fluid H to be dissipated in the air conditioning side circuit 30, and the first heat transfer It is also possible to heat exchange the fluid and the second heat transfer fluid before being supplied to the second heat exchange unit 6.

（２）上記実施形態では、第１運転切換条件が満たされているか否かを判別するに当たり、付加放熱部４による付加放熱運転に加えて、放熱部３による第２運転モードでの放熱運転を行っているが、この放熱部３による放熱運転は、第２運転モードに限るものではなく、第１運転モードでもよい。つまり、第１運転切換条件が満たされているか否かを判別するに当たり、付加放熱部４による付加放熱運転に加えて、第１運転モードと第２運転モードの一方の運転モードにて放熱部３を放熱運転させているものであればよい。 (2) In the above embodiment, in order to determine whether the first operation switching condition is satisfied, in addition to the additional heat dissipation operation by the additional heat dissipation unit 4, the heat dissipation operation in the second operation mode by the heat dissipation unit 3 is Although it has been performed, the heat radiation operation by the heat radiation unit 3 is not limited to the second operation mode, and may be the first operation mode. That is, to determine whether or not the first operation switching condition is satisfied, in addition to the additional heat dissipation operation by the additional heat dissipation unit 4, the heat dissipation unit 3 in one of the first operation mode and the second operation mode As long as the heat release operation is performed.

本発明は、氷蓄熱システムを有する施設を含むエリアを対象とするデマンドレスポンス対応を実現可能な各種の氷蓄熱システムに適用可能である。 The present invention is applicable to various ice heat storage systems capable of realizing demand response handling for an area including a facility having an ice heat storage system.

１冷熱源
２氷蓄熱槽
２ａ伝熱管
３放熱部
４付加放熱部
５第１熱交換部
６第２熱交換部
１０第１循環回路
２０第２循環回路
４１受信部
１００氷蓄熱システム
２００施設
Ｎ１第１熱搬送流体
Ｎ２第２熱搬送流体
Ｈ放熱対象流体
Ｒ１周辺地域
Ｒ２特定エリア
Ｇ外部 DESCRIPTION OF SYMBOLS 1 cold heat source 2 ice thermal storage tank 2a heat transfer tube 3 heat radiating part 4 additional heat radiating part 5 1st heat exchange part 6 2nd heat exchange part 10 1st circulation circuit 20 2nd circulation circuit 41 2nd circulation circuit 41 ice thermal storage system 200 facility N1 1st 1 heat transfer fluid N 2 second heat transfer fluid H heat dissipation target fluid R 1 peripheral area R 2 specific area G outside

Claims

An ice storage tank that produces ice around a heat transfer tube and stores cold heat from a cold heat source,
A heat dissipation unit that performs a heat dissipation operation to dissipate the cold heat stored in the ice heat storage tank to the fluid to be dissipated;
And an additional heat radiation unit for performing an additional heat release operation to release the cold heat from the cold heat source to the heat radiation target fluid,
The heat dissipation unit may perform the heat dissipation operation as follows:
A first operation mode in which a first heat transfer fluid is supplied to the inside of the heat transfer tube in the ice heat storage tank, ice is melted from the inside of the heat transfer tube, and cold heat taken out is dissipated to the fluid to be dissipated;
A second heat transfer fluid is supplied to the outside of the heat transfer tube in the ice heat storage tank, and ice is melted from the outside and the cold heat taken out is dissipated to the fluid to be dissipated Is feasible and
When the heat dissipation unit is performing a heat dissipation operation in one of the first operation mode and the second operation mode, and the additional heat dissipation unit is performing the additional heat dissipation operation, When the operation switching condition is satisfied, the additional heat dissipation unit is stopped, and the heat dissipation unit is configured to perform the heat dissipation operation in both the first operation mode and the second operation mode,
In the first operation switching condition, the power consumption in a specific area including the facility having the ice storage system is expected to exceed the set power which is set as the demand response corresponding to the specific area. It is set to the condition that becomes the timing ,
A first heat exchange unit that exchanges heat between the first heat transfer fluid and the second heat transfer fluid before being supplied to the ice heat storage tank;
A second heat exchange unit for exchanging heat between the second heat transfer fluid and the heat radiation target fluid;
The heat dissipation unit performs a heat dissipation operation in the first operation mode by heat exchange in the first heat exchange unit and heat exchange in the second heat exchange unit, and heat exchange in the second heat exchange unit. It is comprised so that the thermal radiation driving | operation in said 2nd driving | running mode may be performed,
The said ice addition thermal storage part is an ice thermal storage system comprised so that the said additional heat dissipation operation | movement may be performed by the heat exchange in a said 1st heat exchange part, and the heat exchange in a said 2nd heat exchange part .

The receiving unit is provided to receive from the outside a stress request predicted that the power consumption in the specific area exceeds the set power amount, and the first operation switching condition is satisfied based on the stress request received by the receiving unit. The ice heat storage system according to claim 1, wherein it is determined whether or not it is stored.

A first circulation circuit that circulates the first heat transfer fluid by selecting one of the cold heat source, the ice heat storage tank, and the first heat exchange unit that allows the first heat transfer fluid to flow therethrough;
A second circulation circuit that circulates the second heat transfer fluid by selecting one of the ice heat storage tank, the first heat exchange unit, and the second heat exchange unit that allows the second heat transfer fluid to flow; Is equipped with
The heat dissipation unit switches the first circulation circuit to a state in which the first heat transfer fluid is circulated between the ice heat storage tank and the first heat exchange unit, and the heat storage tank and the first heat exchange Switching the second circulation circuit to a state in which the second heat transfer fluid is circulated between the second heat exchange unit and the second heat exchange unit, and performing the heat release operation in the first operation mode;
The heat transfer operation is performed in the second operation mode by switching the second circulation circuit to a state in which the second heat transfer fluid is circulated between the ice heat storage tank and the second heat exchange unit.
The additional heat radiation unit switches the first circulation circuit to a state in which the first heat transfer fluid is circulated between the cold heat source and the first heat exchange unit, and the ice heat storage tank and the first heat exchange parts and switches the second circulation circuit in a state for circulating the second heat-carrying fluid between said second heat exchanger, according to claim 1 or 2 is configured to perform the additional radiating operation Ice storage system.

Equipped in a commercial facility,
Since the heat dissipation unit performs the heat dissipation operation in one of the first operation mode and the second operation mode, and the additional heat dissipation unit is executing the additional heat dissipation operation, the additional heat dissipation unit When the operation of the heat release unit is switched to a state in which the heat release unit performs the heat release operation in both the first operation mode and the second operation mode, the store visits to the commercial facility with respect to the surrounding area is performed. The ice heat storage system according to any one of claims 1 to 3, which sends out store promotion information to promote .