JP7101487B2

JP7101487B2 - Heat supply system

Info

Publication number: JP7101487B2
Application number: JP2018012486A
Authority: JP
Inventors: 秀樹山口; 雅旦田口
Original assignee: Osaka Gas Co Ltd
Current assignee: Osaka Gas Co Ltd
Priority date: 2018-01-29
Filing date: 2018-01-29
Publication date: 2022-07-15
Anticipated expiration: 2038-01-29
Also published as: JP2019132450A

Description

本発明は、蓄熱媒体を熱利用装置に対して供給する熱供給システムに関する。 The present invention relates to a heat supply system that supplies a heat storage medium to a heat utilization device.

特許文献１には、ヒートポンプ装置を利用した熱供給システムが記載されている。具体的には、特許文献１に記載のシステムは、冷媒を圧縮する圧縮機と、冷媒から放熱させる凝縮器（室内熱交換器）と、冷媒を減圧させる減圧弁と、冷媒に吸熱させる蒸発器（室外熱交換器）とを有するヒートポンプ装置を備え、そのヒートポンプ装置の凝縮器において冷媒から回収した熱を、温水の状態で蓄熱タンクに蓄える構成になっている。そして、蓄熱タンクに貯えた高温の温水は、給湯などの用途に利用される。 Patent Document 1 describes a heat supply system using a heat pump device. Specifically, the system described in Patent Document 1 includes a compressor that compresses the refrigerant, a condenser that dissipates heat from the refrigerant (indoor heat exchanger), a pressure reducing valve that reduces the pressure of the refrigerant, and an evaporator that absorbs heat from the refrigerant. A heat pump device having (outdoor heat exchanger) is provided, and the heat recovered from the refrigerant in the condenser of the heat pump device is stored in a heat storage tank in the state of hot water. The high-temperature hot water stored in the heat storage tank is used for hot water supply and the like.

特許文献１に記載のシステムが備えるヒートポンプ装置は、熱を発生させることはできるが、電気を発生させることはできない。そのため、例えば家庭内で使用する電気を発生させるためには、燃料電池などの装置を設置する必要がある。燃料電池は熱と電気とを併せて発生させる熱電併給装置である。そのため、燃料電池を備える熱電併給システムは、燃料電池で発生させた熱を回収した高温の蓄熱媒体を貯える蓄熱タンクを備えている。 The heat pump device included in the system described in Patent Document 1 can generate heat, but cannot generate electricity. Therefore, for example, in order to generate electricity for home use, it is necessary to install a device such as a fuel cell. A fuel cell is a combined heat and power device that generates both heat and electricity. Therefore, the combined heat and power supply system including the fuel cell is provided with a heat storage tank for storing a high-temperature heat storage medium that recovers the heat generated by the fuel cell.

特開２０１１－２３１９５０号公報Japanese Unexamined Patent Publication No. 2011-231950

熱のみを発生する特許文献１に記載のようなヒートポンプシステムと、発電も行える熱電併給システムとの両方を設置することを希望するユーザもいると考えられる。その場合、大幅な改造を行わずに双方のシステムを組み合わせようとすると、ヒートポンプシステムの蓄熱タンクと、熱電併給システムの蓄熱タンクとが併存することになる。 It is considered that some users desire to install both a heat pump system as described in Patent Document 1 that generates only heat and a combined heat and power system that can also generate electricity. In that case, if both systems are combined without major modification, the heat storage tank of the heat pump system and the heat storage tank of the combined heat and power supply system will coexist.

尚、ヒートポンプ装置及び熱電併給装置という２つの熱源で発生した熱を、各別に蓄熱タンクで蓄える構成のシステムになるとしても、２つの蓄熱タンクで各別に貯えられた蓄熱媒体を、熱利用装置に対してどのように供給すれば良いのかは不明である。 Even if the system is configured to store heat generated by two heat sources, a heat pump device and a combined heat and power device, in separate heat storage tanks, the heat storage medium stored separately in each of the two heat storage tanks can be used as a heat utilization device. On the other hand, it is unclear how to supply it.

本発明は、上記の課題に鑑みてなされたものであり、その目的は、２つの蓄熱タンクで各別に貯えられた蓄熱媒体を、熱利用装置に対して適切に供給できる熱供給システムを提供する点にある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat supply system capable of appropriately supplying heat storage media separately stored in two heat storage tanks to a heat utilization device. At the point.

上記目的を達成するための本発明に係る熱供給システムの特徴構成は、熱電併給装置と、蓄熱媒体を貯える第１蓄熱タンクと、前記熱電併給装置で発生した熱が供給される排熱回収用熱交換器と、前記第１蓄熱タンクから抜き出した蓄熱媒体を、前記排熱回収用熱交換器を経由して前記第１蓄熱タンクに戻すことができる第１循環路と、冷媒を圧縮する圧縮機と、冷媒から放熱させる凝縮器と、冷媒を減圧させる減圧弁と、冷媒に吸熱させる蒸発器とを有するヒートポンプ装置と、蓄熱媒体を貯える第２蓄熱タンクと、前記第２蓄熱タンクから抜き出した蓄熱媒体を、前記凝縮器を経由して前記第２蓄熱タンクに戻すことができる第２循環路と、前記第１蓄熱タンクに貯えている蓄熱媒体を前記第２蓄熱タンクに移送できる蓄熱媒体移送路と、を備え、前記第２蓄熱タンクの容積は前記第１蓄熱タンクの容積よりも大きく、前記第２蓄熱タンクから抜き出された蓄熱媒体が熱利用装置に対して供給され、
前記第１蓄熱タンクから前記第２蓄熱タンクへの蓄熱媒体の移送処理を制御する制御装置を備え、
前記制御装置は、所定の熱移送条件が満たされると前記移送処理を実行し、当該移送処理を実行した後は次に前記熱移送条件が満たされるまでは前記移送処理を実行せず、
前記制御装置は、所定時間後に前記第１蓄熱タンク及び前記第２蓄熱タンクで蓄えておくべき目標蓄熱量から、前記第２蓄熱タンクでの現在の蓄熱量と、前記第１蓄熱タンクでの現在の蓄熱量と、前記所定時間後まで前記熱電併給装置を所定出力で連続運転することで前記第１蓄熱タンクに追加で蓄えることができる予測第１蓄熱量とを減算して不足蓄熱量を導出し、前記所定時間後までに前記ヒートポンプ装置を運転することで前記第２蓄熱タンクに前記不足蓄熱量が追加で蓄えられるように前記ヒートポンプ装置の運転スケジュールを決定する点にある。 The characteristic configuration of the heat supply system according to the present invention for achieving the above object is a heat and power combined supply device, a first heat storage tank for storing a heat storage medium, and an exhaust heat recovery for supplying heat generated by the heat and power combined supply device. A first circulation path capable of returning the heat exchanger and the heat storage medium extracted from the first heat storage tank to the first heat storage tank via the exhaust heat recovery heat exchanger, and compression for compressing the refrigerant. A heat pump device having a machine, a condenser that dissipates heat from the refrigerant, a pressure reducing valve that depressurizes the refrigerant, and an evaporator that absorbs heat from the refrigerant, a second heat storage tank that stores a heat storage medium, and a second heat storage tank that is extracted from the second heat storage tank. A second circulation path that can return the heat storage medium to the second heat storage tank via the condenser, and a heat storage medium transfer that can transfer the heat storage medium stored in the first heat storage tank to the second heat storage tank. The second heat storage tank is provided with a path, the volume of the second heat storage tank is larger than the volume of the first heat storage tank, and the heat storage medium extracted from the second heat storage tank is supplied to the heat utilization device.
A control device for controlling the transfer process of the heat storage medium from the first heat storage tank to the second heat storage tank is provided.
The control device executes the transfer process when a predetermined heat transfer condition is satisfied, and after executing the transfer process, does not execute the transfer process until the next heat transfer condition is satisfied.
The control device has the current heat storage amount in the second heat storage tank and the current heat storage amount in the first heat storage tank from the target heat storage amount to be stored in the first heat storage tank and the second heat storage tank after a predetermined time. The insufficient heat storage amount is derived by subtracting the heat storage amount of the above and the predicted first heat storage amount that can be additionally stored in the first heat storage tank by continuously operating the heat and power combined supply device at a predetermined output until after the predetermined time. Then, the operation schedule of the heat pump device is determined so that the insufficient heat storage amount is additionally stored in the second heat storage tank by operating the heat pump device by the predetermined time .

上記特徴構成によれば、熱電併給装置の運転により発生した熱を第１蓄熱タンクに蓄えると共に蓄熱媒体移送路を経由して第２蓄熱タンクに移送でき、ヒートポンプ装置の運転により発生した熱を第２蓄熱タンクに蓄えることができる。このように、より容積の大きい第２蓄熱タンクに熱を集め、その第２蓄熱タンクから抜き出された蓄熱媒体を熱利用装置に対して供給できる。その結果、熱利用装置で急な熱需要が生じても、第２蓄熱タンクから多量の蓄熱媒体を供給できる。
また、第１蓄熱タンクの容積が小さくても、第１蓄熱タンクが高温の蓄熱媒体で満杯になった時点又は満杯になる前などの適当なタイミングで、第１蓄熱タンクに貯えた蓄熱媒体を第２蓄熱タンクに対して適宜移送できる。その結果、第１蓄熱タンクに熱を供給する熱電併給装置を運転させ続けることができる。
更に、熱電併給装置及びそこで発生した熱を蓄える第１蓄熱タンクを備えるシステム並びにヒートポンプ装置及びそこで発生した熱を蓄える第２蓄熱タンクを備えるシステムに対して、例えば何れか一方の蓄熱タンクを取り除く等といった大幅な改造を施すことなく、両方のシステムを併存させることができる。
従って、２つの蓄熱タンクで各別に貯えられた蓄熱媒体を、熱利用装置に対して適切に供給できる熱供給システムを提供できる。 According to the above characteristic configuration, the heat generated by the operation of the combined heat and power supply device can be stored in the first heat storage tank and transferred to the second heat storage tank via the heat storage medium transfer path, and the heat generated by the operation of the heat pump device can be transferred to the second heat storage tank. 2 Can be stored in a heat storage tank. In this way, heat can be collected in the second heat storage tank having a larger volume, and the heat storage medium extracted from the second heat storage tank can be supplied to the heat utilization device. As a result, even if a sudden heat demand occurs in the heat utilization device, a large amount of heat storage medium can be supplied from the second heat storage tank.
Further, even if the volume of the first heat storage tank is small, the heat storage medium stored in the first heat storage tank can be stored at an appropriate timing such as when the first heat storage tank is filled with the high temperature heat storage medium or before it is full. It can be appropriately transferred to the second heat storage tank. As a result, the combined heat and power supply device that supplies heat to the first heat storage tank can be continuously operated.
Further, for a system provided with a combined heat and power supply device and a first heat storage tank for storing the heat generated there, and a system equipped with a heat pump device and a second heat storage tank for storing the heat generated there, for example, removing one of the heat storage tanks, etc. Both systems can coexist without major modifications such as.
Therefore, it is possible to provide a heat supply system capable of appropriately supplying the heat storage medium separately stored in each of the two heat storage tanks to the heat utilization device.

また、熱電併給装置を連続運転する場合、第１蓄熱タンクには高温の蓄熱媒体が連続的に供給される。その高温の蓄熱媒体を第１蓄熱タンクから第２蓄熱タンクへと移送する移送処理を常時実行した場合、蓄熱媒体移送路を流れている蓄熱媒体からの放熱が継続的に発生し、蓄熱媒体を移送するための動力（例えばポンプの動力）が継続的に必要になる。その結果、熱供給システムの省エネルギー性が悪化する可能性がある。
ところが本特徴構成では、制御装置は、所定の熱移送条件が満たされると移送処理を実行し、その移送処理を実行した後は次に熱移送条件が満たされるまでは移送処理を実行しない。つまり、蓄熱媒体移送路を流れている蓄熱媒体からの放熱が発生し、蓄熱媒体を移送するための動力が必要になるのは、移送処理が実行されている間だけになる。従って、熱供給システムの省エネルギー性が良好になる。
加えて、本特徴構成によれば、熱電併給装置を所定出力で連続運転させて熱と電気とを発生させると共に、決定された運転スケジュールに従ってヒートポンプ装置を運転して熱を発生させることで、電気を継続的に供給でき、且つ、所定時間後には第１蓄熱タンク及び第２蓄熱タンクで蓄えた目標蓄熱量の熱を熱利用装置に供給できる状態にすることができる。 Further , when the combined heat and power supply device is continuously operated, a high temperature heat storage medium is continuously supplied to the first heat storage tank. When the transfer process of transferring the high-temperature heat storage medium from the first heat storage tank to the second heat storage tank is constantly executed, heat is continuously dissipated from the heat storage medium flowing through the heat storage medium transfer path, and the heat storage medium is used. Power for transfer (eg pump power) is continuously required. As a result, the energy saving of the heat supply system may deteriorate.
However, in this feature configuration, the control device executes the transfer process when a predetermined heat transfer condition is satisfied, and does not execute the transfer process until the next heat transfer condition is satisfied after the transfer process is executed. That is, heat is dissipated from the heat storage medium flowing through the heat storage medium transfer path, and power for transferring the heat storage medium is required only while the transfer process is being executed. Therefore, the energy saving property of the heat supply system is improved.
In addition, according to this feature configuration, the heat and power cogeneration device is continuously operated at a predetermined output to generate heat and electricity, and the heat pump device is operated according to a determined operation schedule to generate heat to generate electricity. Can be continuously supplied, and after a predetermined time, the heat of the target heat storage amount stored in the first heat storage tank and the second heat storage tank can be supplied to the heat utilization device.

本発明に係る熱供給システムの別の特徴構成は、前記制御装置は、前記第１蓄熱タンクでの蓄熱量が第１上限値以上になると前記熱移送条件が満たされたと判定する点にある。 Another characteristic configuration of the heat supply system according to the present invention is that the control device determines that the heat transfer condition is satisfied when the amount of heat stored in the first heat storage tank becomes equal to or more than the first upper limit value.

上記特徴構成によれば、第１蓄熱タンクに蓄えられた熱量が多くなったときに、第１蓄熱タンクから第２蓄熱タンクへの蓄熱媒体の移送処理が行われる。つまり、頻繁な移送処理が行われなくなるため、熱供給システムの省エネルギー性が良好になる。 According to the above characteristic configuration, when the amount of heat stored in the first heat storage tank increases, the heat storage medium is transferred from the first heat storage tank to the second heat storage tank. That is, since the frequent transfer process is not performed, the energy saving of the heat supply system is improved.

本発明に係る熱供給システムの更に別の特徴構成は、前記制御装置は、前記移送処理において、前記第１蓄熱タンクから前記第２蓄熱タンクへ、前記第１蓄熱タンクの容積の５０％以上の所定移送量の蓄熱媒体を移送する点にある。 Yet another characteristic configuration of the heat supply system according to the present invention is that, in the transfer process, the control device moves from the first heat storage tank to the second heat storage tank to 50% or more of the volume of the first heat storage tank. The point is to transfer a predetermined transfer amount of heat storage medium.

上記特徴構成によれば、１回の移送処理で多量の蓄熱媒体が移送される。つまり、少量の蓄熱媒体の移送が数多く行われる場合に比べて、蓄熱媒体からの放熱量を少なくできる。 According to the above characteristic configuration, a large amount of heat storage medium is transferred in one transfer process. That is, the amount of heat dissipated from the heat storage medium can be reduced as compared with the case where a large number of small amounts of heat storage media are transferred.

本発明に係る熱供給システムの更に別の特徴構成は、前記制御装置は、前記移送処理において、前記第２蓄熱タンクでの蓄熱量が少ないほど前記所定移送量を大きい値に設定する点にある。 Another characteristic configuration of the heat supply system according to the present invention is that the control device sets the predetermined transfer amount to a larger value as the heat storage amount in the second heat storage tank is smaller in the transfer process. ..

上記特徴構成によれば、第２蓄熱タンクには、第１蓄熱タンクから移送されてきた蓄熱媒体も含めて多量の蓄熱媒体が貯えられている状態をつくることができる。従って、熱利用装置に対して、第２蓄熱タンクから多量の蓄熱媒体を供給できる。 According to the above characteristic configuration, it is possible to create a state in which a large amount of heat storage medium including the heat storage medium transferred from the first heat storage tank is stored in the second heat storage tank. Therefore, a large amount of heat storage medium can be supplied to the heat utilization device from the second heat storage tank.

本発明に係る熱供給システムの更に別の特徴構成は、前記制御装置は、前記第１蓄熱タンクでの蓄熱量が第１上限値未満の第１下限値以上であり且つ前記第２蓄熱タンクでの蓄熱量が第２下限値未満になると前記熱移送条件が満たされたと判定する点にある。 Yet another characteristic configuration of the heat supply system according to the present invention is that the control device has a heat storage amount in the first heat storage tank of less than the first upper limit value or more than the first lower limit value and in the second heat storage tank. When the amount of heat storage is less than the second lower limit value, it is determined that the heat transfer condition is satisfied.

上記特徴構成によれば、第２蓄熱タンクでの蓄熱量が少なくなり、第１蓄熱タンクでの蓄熱量が第１下限値以上ある場合に、第１蓄熱タンクから第２蓄熱タンクへの蓄熱媒体の移送処理が行われる。従って、移送処理によって、第２蓄熱タンクに貯えている蓄熱媒体を増加させて、熱利用装置に対して第２蓄熱タンクから蓄熱媒体を供給できる体制を整えることができる。 According to the above characteristic configuration, when the amount of heat storage in the second heat storage tank is small and the amount of heat storage in the first heat storage tank is equal to or more than the first lower limit value, the heat storage medium from the first heat storage tank to the second heat storage tank. Transfer processing is performed. Therefore, by the transfer process, the heat storage medium stored in the second heat storage tank can be increased, and a system capable of supplying the heat storage medium from the second heat storage tank to the heat utilization device can be established.

本発明に係る熱供給システムの更に別の特徴構成は、前記制御装置は、前記第２蓄熱タンクでの蓄熱量が満杯状態である場合、前記移送処理の実行を停止する点にある。 Yet another characteristic configuration of the heat supply system according to the present invention is that the control device stops the execution of the transfer process when the heat storage amount in the second heat storage tank is full.

第２蓄熱タンクでの蓄熱量が満杯状態になると、それ以上の熱量を第２蓄熱タンクに蓄えることができない。
そこで本特徴構成では、制御装置が、第２蓄熱タンクでの蓄熱量が満杯状態である場合には移送処理の実行を停止することで、移送処理によって第１蓄熱タンクから第２蓄熱タンクへと移送する予定であった熱量を第１蓄熱タンクで蓄え続けることができる。 When the amount of heat stored in the second heat storage tank is full, no more heat can be stored in the second heat storage tank.
Therefore, in this feature configuration, the control device stops the execution of the transfer process when the heat storage amount in the second heat storage tank is full, so that the transfer process transfers the heat from the first heat storage tank to the second heat storage tank. The amount of heat that was planned to be transferred can be continuously stored in the first heat storage tank.

熱供給システムの構成を示す図である。It is a figure which shows the structure of a heat supply system. 不足蓄熱量を導出する手法を模式的に描いた図である。It is a figure which schematically drawn the method of deriving the insufficient heat storage amount.

以下に図面を参照して本発明の実施形態に係る熱供給システムについて説明する。
図１は熱供給システムの構成を示す図である。図示するように、熱供給システムは、熱電併給装置としての燃料電池１１と、蓄熱媒体を貯える第１蓄熱タンク１３と、燃料電池１１で発生した熱が供給される排熱回収用熱交換器１２と、第１蓄熱タンク１３から抜き出した蓄熱媒体を、排熱回収用熱交換器１２を経由して第１蓄熱タンク１３に戻すことができる第１循環路１４と、冷媒を圧縮する圧縮機２３と、冷媒から放熱させる凝縮器（室内熱交換器２２）と、冷媒を減圧させる減圧弁２５と、冷媒に吸熱させる蒸発器（室外熱交換器２４）とを有するヒートポンプ装置Ｈと、蓄熱媒体を貯える第２蓄熱タンク２１と、第２蓄熱タンク２１から抜き出した蓄熱媒体を、凝縮器（室内熱交換器２２）を経由して第２蓄熱タンク２１に戻すことができる第２循環路２７と、第１蓄熱タンク１３に貯えている蓄熱媒体を第２蓄熱タンク２１に移送できる蓄熱媒体移送路１５と、を備える。本実施形態では、水を蓄熱媒体として用いており、流入路（給水路）１から第２蓄熱タンク２１の内部に給水圧が加わった状態になっている。 The heat supply system according to the embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a heat supply system. As shown in the figure, the heat supply system includes a fuel cell 11 as a combined heat and power device, a first heat storage tank 13 for storing a heat storage medium, and a heat exchanger 12 for exhaust heat recovery to which heat generated by the fuel cell 11 is supplied. A first circulation path 14 capable of returning the heat storage medium extracted from the first heat storage tank 13 to the first heat storage tank 13 via the exhaust heat recovery heat exchanger 12, and a compressor 23 for compressing the refrigerant. A heat pump device H having a condenser (indoor heat exchanger 22) that dissipates heat from the refrigerant, a pressure reducing valve 25 that depressurizes the refrigerant, and an evaporator (outdoor heat exchanger 24) that absorbs heat from the refrigerant, and a heat storage medium. The second heat storage tank 21 for storing and the second circulation path 27 capable of returning the heat storage medium extracted from the second heat storage tank 21 to the second heat storage tank 21 via the condenser (indoor heat exchanger 22). A heat storage medium transfer path 15 capable of transferring the heat storage medium stored in the first heat storage tank 13 to the second heat storage tank 21 is provided. In the present embodiment, water is used as a heat storage medium, and the water supply pressure is applied from the inflow passage (water supply passage) 1 to the inside of the second heat storage tank 21.

図１には、熱電併給システム１０が、燃料電池１１及び第１蓄熱タンク１３及び排熱回収用熱交換器１２及び第１循環路１４及び蓄熱媒体移送路１５を有し、ヒートポンプシステム２０が、ヒートポンプ装置Ｈ及び第２蓄熱タンク２１及び第２循環路２７及び蓄熱媒体移送路１５を有する構成を例示している。 In FIG. 1, the combined heat and power system 10 includes a fuel cell 11, a first heat storage tank 13, a heat exchanger 12 for exhaust heat recovery, a first circulation path 14, and a heat storage medium transfer path 15, and the heat pump system 20 includes a heat pump system 20. The configuration including the heat pump device H, the second heat storage tank 21, the second circulation path 27, and the heat storage medium transfer path 15 is illustrated.

〔熱電併給システム１０〕
熱電併給システム１０は、熱と電気とを併せて発生させる熱電併給装置としての燃料電池１１で発生した熱を第１蓄熱タンク１３に蓄える構成になっている。尚、燃料電池１１で発生した電気は電気機器（図示せず）や電力系統などに供給されるが本実施形態では説明を省略する。
図１に示した熱電併給システム１０について具体的に説明すると、燃料電池１１は例えば固体酸化物形燃料電池や固体高分子形燃料電池などである。燃料電池１１の発電作動に伴って発生した熱は排熱回収用熱交換器１２に供給される。熱電併給システム１０は、排熱回収用熱交換器１２と第１蓄熱タンク１３との間で蓄熱媒体を循環させることのできる第１循環路１４を有する。第１循環路１４の途中にはポンプＰ１が設けられている。燃料電池１１及びポンプＰ１の動作は制御装置Ｃが制御する。 [Combined heat and power system 10]
The combined heat and power system 10 is configured to store the heat generated by the fuel cell 11 as the combined heat and power supply device that generates both heat and electricity in the first heat storage tank 13. The electricity generated by the fuel cell 11 is supplied to an electric device (not shown), an electric power system, or the like, but the description thereof will be omitted in the present embodiment.
The combined heat and power system 10 shown in FIG. 1 will be specifically described. The fuel cell 11 is, for example, a solid oxide fuel cell, a solid polymer fuel cell, or the like. The heat generated by the power generation operation of the fuel cell 11 is supplied to the waste heat recovery heat exchanger 12. The combined heat and power system 10 has a first circulation path 14 capable of circulating a heat storage medium between the waste heat recovery heat exchanger 12 and the first heat storage tank 13. A pump P1 is provided in the middle of the first circulation path 14. The operation of the fuel cell 11 and the pump P1 is controlled by the control device C.

制御装置Ｃは、燃料電池１１を運転しているとき、ポンプＰ１を動作させる。ポンプＰ１が動作すると、第１蓄熱タンク１３の下部に貯えられている相対的に低温の蓄熱媒体が第１循環路１４へと取り出され、第１循環路１４を通って排熱回収用熱交換器１２に到達する。そして、排熱回収用熱交換器１２で燃料電池１１から排出された熱によって加熱された後の蓄熱媒体が第１循環路１４を通って第１蓄熱タンク１３の上部に帰還する。このようにして、第１蓄熱タンク１３では、高温の蓄熱媒体が上部に貯えられ、低温の蓄熱媒体が下部に貯えられている状態、即ち、蓄熱媒体が温度成層を形成する状態で貯えられる。排熱回収用熱交換器１２から第１蓄熱タンク１３に向かう間の第１循環路１４の途中には、蓄熱媒体の温度を測定する温度センサ１６が設けられている。制御装置Ｃは、この温度センサ１６によって測定される、排熱回収用熱交換器１２の下流側を流れる蓄熱媒体の温度が目標温度（例えば７０℃など）になるように、ポンプＰ１の動作を制御する。 The control device C operates the pump P1 while operating the fuel cell 11. When the pump P1 operates, the relatively low temperature heat storage medium stored in the lower part of the first heat storage tank 13 is taken out to the first circulation passage 14, and heat exchange for waste heat recovery passes through the first circulation passage 14. Reach the vessel 12. Then, the heat storage medium after being heated by the heat discharged from the fuel cell 11 in the waste heat recovery heat exchanger 12 returns to the upper part of the first heat storage tank 13 through the first circulation passage 14. In this way, in the first heat storage tank 13, the high temperature heat storage medium is stored in the upper part, and the low temperature heat storage medium is stored in the lower part, that is, the heat storage medium is stored in the state of forming the temperature stratification. A temperature sensor 16 for measuring the temperature of the heat storage medium is provided in the middle of the first circulation path 14 between the waste heat recovery heat exchanger 12 and the first heat storage tank 13. The control device C operates the pump P1 so that the temperature of the heat storage medium flowing downstream of the waste heat recovery heat exchanger 12 measured by the temperature sensor 16 becomes the target temperature (for example, 70 ° C.). Control.

第１蓄熱タンク１３には、貯えられている蓄熱媒体の温度を測定する温度センサＴ１１，Ｔ１２，Ｔ１３，Ｔ１４，Ｔ１５が設けられている。温度センサＴ１１が第１蓄熱タンク１３の最も上部に貯えられている蓄熱媒体の温度を測定し、温度センサＴ１５が第１蓄熱タンク１３の最も下部に貯えられている蓄熱媒体の温度を測定し、温度センサＴ１２，Ｔ１３，Ｔ１４はそれらの間に貯えられている蓄熱媒体の温度を測定するように構成されている。 The first heat storage tank 13 is provided with temperature sensors T11, T12, T13, T14, and T15 for measuring the temperature of the stored heat storage medium. The temperature sensor T11 measures the temperature of the heat storage medium stored in the uppermost part of the first heat storage tank 13, and the temperature sensor T15 measures the temperature of the heat storage medium stored in the lowermost part of the first heat storage tank 13. The temperature sensors T12, T13, and T14 are configured to measure the temperature of the heat storage medium stored between them.

本実施形態の例では、第１蓄熱タンク１３の容積は３０Ｌである。そして、温度センサＴ１１は、第１蓄熱タンク１３の頂部からの容積が１Ｌの位置に設けられる。温度センサＴ１２は、第１蓄熱タンク１３の頂部からの容積が５Ｌの位置に設けられる。温度センサＴ１３は、第１蓄熱タンク１３の頂部からの容積が１５Ｌの位置に設けられる。温度センサＴ１４は、第１蓄熱タンク１３の頂部からの容積が２５Ｌの位置に設けられる。温度センサＴ１５は、第１蓄熱タンク１３の頂部からの容積が２９Ｌの位置に設けられる。このような構成を採用することで、制御装置Ｃは、温度センサＴ１１，Ｔ１２，Ｔ１３，Ｔ１４，Ｔ１５の測定結果に基づいて、上述した目標温度（７０℃）の蓄熱媒体が第１蓄熱タンク１３の内部でどれだけ貯えられているのかを判定できる。つまり、制御装置Ｃは、第１蓄熱タンク１３での現在の蓄熱量を判定できる。加えて、制御装置Ｃは、温度センサＴ１１，Ｔ１２，Ｔ１３，Ｔ１４，Ｔ１５の全てで目標温度の蓄熱媒体の存在を検知したとき、第１蓄熱タンク１３に目標温度の蓄熱媒体が満杯の状態になっていると判定できる。 In the example of this embodiment, the volume of the first heat storage tank 13 is 30 L. The temperature sensor T11 is provided at a position where the volume from the top of the first heat storage tank 13 is 1 L. The temperature sensor T12 is provided at a position where the volume from the top of the first heat storage tank 13 is 5 L. The temperature sensor T13 is provided at a position where the volume from the top of the first heat storage tank 13 is 15 L. The temperature sensor T14 is provided at a position where the volume from the top of the first heat storage tank 13 is 25 L. The temperature sensor T15 is provided at a position where the volume from the top of the first heat storage tank 13 is 29 L. By adopting such a configuration, in the control device C, the heat storage medium having the target temperature (70 ° C.) described above is the first heat storage tank 13 based on the measurement results of the temperature sensors T11, T12, T13, T14, and T15. You can determine how much is stored inside. That is, the control device C can determine the current heat storage amount in the first heat storage tank 13. In addition, when the control device C detects the presence of the heat storage medium having the target temperature in all of the temperature sensors T11, T12, T13, T14, and T15, the first heat storage tank 13 is filled with the heat storage medium having the target temperature. It can be determined that it is.

〔ヒートポンプシステム２０〕
ヒートポンプシステム２０は、ヒートポンプ装置Ｈで発生した熱を第２蓄熱タンク２１に蓄える構成になっている。
図１に示したヒートポンプシステム２０について具体的に説明すると、ヒートポンプ装置Ｈは例えば電動機によって圧縮機２３を駆動するＥＨＰなどである。ヒートポンプシステム２０は、ヒートポンプ装置Ｈと第２蓄熱タンク２１との間で蓄熱媒体を循環させることのできる第２循環路２７を有する。第２循環路２７の途中にはポンプＰ２が設けられている。ヒートポンプ装置Ｈ及びポンプＰ２の動作は制御装置Ｃが制御する。 [Heat pump system 20]
The heat pump system 20 is configured to store the heat generated by the heat pump device H in the second heat storage tank 21.
Specifically, the heat pump system 20 shown in FIG. 1 will be described specifically. The heat pump device H is, for example, an EHP in which a compressor 23 is driven by an electric motor. The heat pump system 20 has a second circulation path 27 capable of circulating a heat storage medium between the heat pump device H and the second heat storage tank 21. A pump P2 is provided in the middle of the second circulation path 27. The operation of the heat pump device H and the pump P2 is controlled by the control device C.

制御装置Ｃは、ヒートポンプ装置Ｈを運転しているとき、ポンプＰ２を動作させる。ポンプＰ２が動作すると、第２蓄熱タンク２１の下部に貯えられている相対的に低温の蓄熱媒体が第２循環路２７へと取り出され、第２循環路２７を通ってヒートポンプ装置Ｈの凝縮器（室内熱交換器２２）に到達する。ヒートポンプ装置Ｈでは、圧縮機２３によって圧縮された冷媒が冷媒循環路２６を流れ、蒸発器（室外熱交換器２４）に供給される。そして、蒸発器（室外熱交換器２４）で外気の熱を吸熱した冷媒を減圧弁２５で減圧させた後、凝縮器（室内熱交換器２２）で第２循環路２７を流れる蓄熱媒体と冷媒との熱交換が行われることで、冷媒からの放熱、即ち、蓄熱媒体の加熱が行われる。そして、ヒートポンプ装置Ｈの凝縮器（室内熱交換器２２）で加熱された後の蓄熱媒体が第２循環路２７を通って第２蓄熱タンク２１の上部に帰還する。このようにして、第２蓄熱タンク２１では、高温の蓄熱媒体が上部に貯えられ、低温の蓄熱媒体が下部に貯えられている状態、即ち、蓄熱媒体が温度成層を形成する状態で貯えられる。ヒートポンプ装置Ｈの凝縮器（室内熱交換器２２）から第２蓄熱タンク２１に向かう間の第２循環路２７の途中には、蓄熱媒体の温度を測定する温度センサ２８が設けられている。制御装置Ｃは、この温度センサ２８によって測定される、ヒートポンプ装置Ｈの凝縮器（室内熱交換器２２）の下流側を流れる蓄熱媒体の温度が目標温度（例えば７０℃など）になるように、ポンプＰ２の動作を制御する。 The control device C operates the pump P2 while operating the heat pump device H. When the pump P2 operates, the relatively low temperature heat storage medium stored in the lower part of the second heat storage tank 21 is taken out to the second circulation passage 27, and the condenser of the heat pump device H passes through the second circulation passage 27. (Indoor heat exchanger 22) is reached. In the heat pump device H, the refrigerant compressed by the compressor 23 flows through the refrigerant circulation path 26 and is supplied to the evaporator (outdoor heat exchanger 24). Then, after decompressing the refrigerant that has absorbed the heat of the outside air with the evaporator (outdoor heat exchanger 24) with the pressure reducing valve 25, the heat storage medium and the refrigerant flowing through the second circulation path 27 with the condenser (indoor heat exchanger 22). By exchanging heat with the refrigerant, heat is dissipated from the refrigerant, that is, the heat storage medium is heated. Then, the heat storage medium heated by the condenser (indoor heat exchanger 22) of the heat pump device H returns to the upper part of the second heat storage tank 21 through the second circulation path 27. In this way, in the second heat storage tank 21, the high temperature heat storage medium is stored in the upper part, and the low temperature heat storage medium is stored in the lower part, that is, the heat storage medium is stored in the state of forming the temperature stratification. A temperature sensor 28 for measuring the temperature of the heat storage medium is provided in the middle of the second circulation path 27 between the condenser (indoor heat exchanger 22) of the heat pump device H and the second heat storage tank 21. The control device C is set so that the temperature of the heat storage medium flowing downstream of the condenser (indoor heat exchanger 22) of the heat pump device H, which is measured by the temperature sensor 28, becomes the target temperature (for example, 70 ° C.). It controls the operation of the pump P2.

第２蓄熱タンク２１には、貯えられている蓄熱媒体の温度を測定する温度センサＴ２１，Ｔ２２，Ｔ２３，Ｔ２４，Ｔ２５が設けられている。温度センサＴ２１が第２蓄熱タンク２１の最も上部に貯えられている蓄熱媒体の温度を測定し、温度センサＴ２５が第２蓄熱タンク２１の最も下部に貯えられている蓄熱媒体の温度を測定し、温度センサＴ２２，Ｔ２３，Ｔ２４はそれらの間に貯えられている蓄熱媒体の温度を測定するように構成されている。 The second heat storage tank 21 is provided with temperature sensors T21, T22, T23, T24, and T25 for measuring the temperature of the stored heat storage medium. The temperature sensor T21 measures the temperature of the heat storage medium stored in the uppermost part of the second heat storage tank 21, and the temperature sensor T25 measures the temperature of the heat storage medium stored in the lowermost part of the second heat storage tank 21. The temperature sensors T22, T23, and T24 are configured to measure the temperature of the heat storage medium stored between them.

本実施形態の例では、第２蓄熱タンク２１の容積は１００Ｌである。そして、温度センサＴ２１は、第２蓄熱タンク２１の頂部からの容積が１Ｌの位置に設けられる。温度センサＴ２２は、第２蓄熱タンク２１の頂部からの容積が１０Ｌの位置に設けられる。温度センサＴ２３は、第２蓄熱タンク２１の頂部からの容積が５０Ｌの位置に設けられる。温度センサＴ２４は、第２蓄熱タンク２１の頂部からの容積が７５Ｌの位置に設けられる。温度センサＴ２５は、第２蓄熱タンク２１の頂部からの容積が９９Ｌの位置に設けられる。このような構成を採用することで、制御装置Ｃは、温度センサＴ２１，Ｔ２２，Ｔ２３，Ｔ２４，Ｔ２５の測定結果に基づいて、上述した目標温度（７０℃）の蓄熱媒体が第２蓄熱タンク２１の内部でどれだけ貯えられているのかを判定できる。つまり、制御装置Ｃは、第２蓄熱タンク２１での現在の蓄熱量を判定できる。加えて、制御装置Ｃは、温度センサＴ２１，Ｔ２２，Ｔ２３，Ｔ２４，Ｔ２５の全てで目標温度の蓄熱媒体の存在を検知したとき、第２蓄熱タンク２１に目標温度の蓄熱媒体が満杯の状態になっている（即ち、蓄熱量が満杯状態になっている）と判定できる。 In the example of this embodiment, the volume of the second heat storage tank 21 is 100 L. The temperature sensor T21 is provided at a position where the volume from the top of the second heat storage tank 21 is 1 L. The temperature sensor T22 is provided at a position where the volume from the top of the second heat storage tank 21 is 10 L. The temperature sensor T23 is provided at a position where the volume from the top of the second heat storage tank 21 is 50 L. The temperature sensor T24 is provided at a position where the volume from the top of the second heat storage tank 21 is 75 L. The temperature sensor T25 is provided at a position where the volume from the top of the second heat storage tank 21 is 99 L. By adopting such a configuration, in the control device C, the heat storage medium having the target temperature (70 ° C.) described above is the second heat storage tank 21 based on the measurement results of the temperature sensors T21, T22, T23, T24, and T25. You can determine how much is stored inside. That is, the control device C can determine the current heat storage amount in the second heat storage tank 21. In addition, when the control device C detects the presence of the heat storage medium having the target temperature in all of the temperature sensors T21, T22, T23, T24, and T25, the second heat storage tank 21 is filled with the heat storage medium having the target temperature. It can be determined that the temperature is high (that is, the heat storage amount is full).

図１に示す熱供給システムでは、第２蓄熱タンク２１から抜き出された蓄熱媒体が熱利用装置５に対して供給される。具体的には、第２蓄熱タンク２１の上部には流出路２が接続されており、この流出路２を通って熱利用装置５に蓄熱媒体が供給される。例えば、第２蓄熱タンク２１に貯えられている蓄熱媒体には流入路１から給水圧が常時加わっており、熱利用装置５で蓄熱媒体が利用されると、その利用された分の蓄熱媒体が流入路１から第２蓄熱タンク２１に流入する。 In the heat supply system shown in FIG. 1, the heat storage medium extracted from the second heat storage tank 21 is supplied to the heat utilization device 5. Specifically, an outflow path 2 is connected to the upper part of the second heat storage tank 21, and a heat storage medium is supplied to the heat utilization device 5 through the outflow path 2. For example, water supply pressure is constantly applied to the heat storage medium stored in the second heat storage tank 21 from the inflow path 1, and when the heat storage medium is used in the heat utilization device 5, the used heat storage medium is used. It flows from the inflow path 1 into the second heat storage tank 21.

流出路２の途中には、第２蓄熱タンク２１から抜き出された蓄熱媒体を加熱して熱利用装置５に供給できる補助熱源機３が設けられている。補助熱源機３の動作は制御装置Ｃが制御する。例えば、制御装置Ｃは、第２蓄熱タンク２１と補助熱源機３との間の流出路２に設けられた温度センサ７で測定された蓄熱媒体の温度が、熱利用装置５で要求されている蓄熱媒体の要求温度よりも低いとき、温度センサ８で測定される補助熱源機３で加熱された後の蓄熱媒体の温度が上記要求温度になるように補助熱源機３を動作させる。 In the middle of the outflow path 2, an auxiliary heat source machine 3 capable of heating the heat storage medium extracted from the second heat storage tank 21 and supplying it to the heat utilization device 5 is provided. The operation of the auxiliary heat source machine 3 is controlled by the control device C. For example, in the control device C, the temperature of the heat storage medium measured by the temperature sensor 7 provided in the outflow path 2 between the second heat storage tank 21 and the auxiliary heat source machine 3 is required by the heat utilization device 5. When the temperature is lower than the required temperature of the heat storage medium, the auxiliary heat source machine 3 is operated so that the temperature of the heat storage medium after being heated by the auxiliary heat source machine 3 measured by the temperature sensor 8 becomes the required temperature.

流出路２の途中には、熱利用装置５に供給される蓄熱媒体の単位時間当たりの流量を測定する流量センサ４が設けられている。制御装置Ｃは、温度センサ８の測定結果及び流量センサ４の測定結果を参照して、熱利用装置５で利用された単位時間当たりの熱量を導出できる。制御装置Ｃは、導出した熱利用装置５で利用された単位時間当たりの熱量（過去データ）を記憶装置６に記憶させる。 A flow rate sensor 4 for measuring the flow rate of the heat storage medium supplied to the heat utilization device 5 per unit time is provided in the middle of the outflow path 2. The control device C can derive the amount of heat per unit time used in the heat utilization device 5 by referring to the measurement result of the temperature sensor 8 and the measurement result of the flow rate sensor 4. The control device C stores the heat amount (past data) per unit time used in the derived heat utilization device 5 in the storage device 6.

図１に示した熱供給システムでは、第２蓄熱タンク２１の容積は第１蓄熱タンク１３の容積よりも大きい。そして、上述したように、熱利用装置５には第２蓄熱タンク２１からのみ蓄熱媒体を供給できる。そのため、第１蓄熱タンク１３に貯えられた蓄熱媒体を蓄熱媒体移送路１５を用いて第２蓄熱タンク２１へと移送する必要がある。本実施形態の蓄熱媒体移送路１５は、第１蓄熱タンク１３の上部と第２蓄熱タンク２１の上部とを接続しており、その途中にポンプＰ３が設けられている。ポンプＰ３が動作すると、第１蓄熱タンク１３の上部に貯えられた相対的に高温の蓄熱媒体が第２蓄熱タンク２１の上部に流入する。また、第１蓄熱タンク１３と第２蓄熱タンク２１との間には、第１蓄熱タンク１３の下部と第２蓄熱タンク２１の下部とを接続する蓄熱媒体補充路１７も設けられており、ポンプＰ３が動作して第１蓄熱タンク１３の上部から第２蓄熱タンク２１の上部に流入するのに伴って、第２蓄熱タンク２１の下部から第１蓄熱タンク１３の下部へと相対的に低温の蓄熱媒体が補充される。ポンプＰ３の動作は制御装置Ｃが制御する。 In the heat supply system shown in FIG. 1, the volume of the second heat storage tank 21 is larger than the volume of the first heat storage tank 13. Then, as described above, the heat storage medium can be supplied to the heat utilization device 5 only from the second heat storage tank 21. Therefore, it is necessary to transfer the heat storage medium stored in the first heat storage tank 13 to the second heat storage tank 21 using the heat storage medium transfer path 15. The heat storage medium transfer path 15 of the present embodiment connects the upper part of the first heat storage tank 13 and the upper part of the second heat storage tank 21, and a pump P3 is provided in the middle thereof. When the pump P3 operates, the relatively high temperature heat storage medium stored in the upper part of the first heat storage tank 13 flows into the upper part of the second heat storage tank 21. Further, between the first heat storage tank 13 and the second heat storage tank 21, a heat storage medium replenishment path 17 for connecting the lower part of the first heat storage tank 13 and the lower part of the second heat storage tank 21 is also provided, and a pump is provided. As P3 operates and flows from the upper part of the first heat storage tank 13 to the upper part of the second heat storage tank 21, the temperature is relatively low from the lower part of the second heat storage tank 21 to the lower part of the first heat storage tank 13. The heat storage medium is replenished. The operation of the pump P3 is controlled by the control device C.

以上のように、燃料電池１１の運転により発生した熱を第１蓄熱タンク１３に蓄えると共に蓄熱媒体移送路１５を経由して第２蓄熱タンク２１に移送でき、ヒートポンプ装置Ｈの運転により発生した熱を第２蓄熱タンク２１に蓄えることができる。このように、より容積の大きい第２蓄熱タンク２１に熱を集め、その第２蓄熱タンク２１から抜き出された蓄熱媒体を熱利用装置５に対して供給できる。その結果、熱利用装置５で急な熱需要が生じても、第２蓄熱タンク２１から多量の蓄熱媒体を供給できる。
また、第１蓄熱タンク１３の容積が小さくても、第１蓄熱タンク１３が高温の蓄熱媒体で満杯になった時点又は満杯になる前などの適当なタイミングで、第１蓄熱タンク１３に貯えた蓄熱媒体を第２蓄熱タンク２１に対して適宜移送できる。その結果、第１蓄熱タンク１３に熱を供給する燃料電池１１を運転させ続けることができる。
更に、燃料電池１１及び第１蓄熱タンク１３を備える熱電併給システム１０並びにヒートポンプ装置Ｈ及び第２蓄熱タンク２１を備えるヒートポンプシステム２０に対して、例えば何れか一方の蓄熱タンクを取り除く等といった大幅な改造を施すことなく、両方のシステムを併存させることができる。 As described above, the heat generated by the operation of the fuel cell 11 can be stored in the first heat storage tank 13 and transferred to the second heat storage tank 21 via the heat storage medium transfer path 15, and the heat generated by the operation of the heat pump device H can be transferred. Can be stored in the second heat storage tank 21. In this way, heat can be collected in the second heat storage tank 21 having a larger volume, and the heat storage medium extracted from the second heat storage tank 21 can be supplied to the heat utilization device 5. As a result, even if a sudden heat demand occurs in the heat utilization device 5, a large amount of heat storage medium can be supplied from the second heat storage tank 21.
Further, even if the volume of the first heat storage tank 13 is small, the first heat storage tank 13 is stored in the first heat storage tank 13 at an appropriate timing such as when the first heat storage tank 13 is full or before it is full. The heat storage medium can be appropriately transferred to the second heat storage tank 21. As a result, the fuel cell 11 that supplies heat to the first heat storage tank 13 can be continuously operated.
Further, the heat and power combined supply system 10 including the fuel cell 11 and the first heat storage tank 13 and the heat pump system 20 including the heat pump device H and the second heat storage tank 21 are significantly modified, for example, by removing one of the heat storage tanks. Both systems can coexist without the need for.

〔ヒートポンプ装置Ｈの運転〕
制御装置Ｃは、第１蓄熱タンク１３及び第２蓄熱タンク２１で蓄えておくべき目標蓄熱量などに応じてヒートポンプ装置Ｈの運転スケジュールを決定できる。具体的には、制御装置Ｃは、所定時間後に第１蓄熱タンク１３及び第２蓄熱タンク２１で蓄えておくべき目標蓄熱量から、第２蓄熱タンク２１での現在の蓄熱量と、第１蓄熱タンク１３での現在の蓄熱量と、所定時間後まで燃料電池１１を所定出力で連続運転することで第１蓄熱タンク１３に追加で蓄えることができる予測第１蓄熱量とを減算して不足蓄熱量を導出し、所定時間後までにヒートポンプ装置Ｈを運転することで第２蓄熱タンク２１に不足蓄熱量が追加で蓄えられるようにヒートポンプ装置Ｈの運転スケジュールを決定する [Operation of heat pump device H]
The control device C can determine the operation schedule of the heat pump device H according to the target heat storage amount to be stored in the first heat storage tank 13 and the second heat storage tank 21. Specifically, the control device C has the current heat storage amount in the second heat storage tank 21 and the first heat storage from the target heat storage amount to be stored in the first heat storage tank 13 and the second heat storage tank 21 after a predetermined time. Insufficient heat storage by subtracting the current heat storage amount in the tank 13 and the predicted first heat storage amount that can be additionally stored in the first heat storage tank 13 by continuously operating the fuel cell 11 at a predetermined output until a predetermined time later. The operation schedule of the heat pump device H is determined so that the insufficient heat storage amount can be additionally stored in the second heat storage tank 21 by deriving the amount and operating the heat pump device H by a predetermined time.

図２は、不足蓄熱量を導出する手法を模式的に描いた図である。制御装置Ｃは、記憶装置６に記憶されている、過去に熱利用装置５で利用された単位時間毎の熱量に関する情報（過去データ）を参照して、将来の所定時間後に熱利用装置５で利用されると予測できる熱量、即ち、将来の所定時間後に第１蓄熱タンク１３及び第２蓄熱タンク２１で蓄えておくべき目標蓄熱量を導出できる。例えば、熱利用装置５が風呂やシャワーなどである場合、過去データに基づいて、１９時台の１時間で設定量の熱量が消費されるといった予測を行うことができる。そのため、制御装置Ｃは、１９時までに（即ち、所定時間後に）第１蓄熱タンク１３及び第２蓄熱タンク２１で蓄えておくべき目標蓄熱量に応じてヒートポンプ装置Ｈの運転スケジュールを決定し、その運転スケジュールに従ってヒートポンプ装置Ｈの動作を制御する。 FIG. 2 is a diagram schematically depicting a method for deriving the insufficient heat storage amount. The control device C refers to the information (past data) regarding the amount of heat for each unit time used in the heat utilization device 5 in the past, which is stored in the storage device 6, and is stored in the heat utilization device 5 after a predetermined time in the future. The amount of heat that can be predicted to be used, that is, the target amount of heat storage that should be stored in the first heat storage tank 13 and the second heat storage tank 21 after a predetermined time in the future can be derived. For example, when the heat utilization device 5 is a bath, a shower, or the like, it is possible to predict that a set amount of heat will be consumed in one hour in the 19:00 range based on past data. Therefore, the control device C determines the operation schedule of the heat pump device H according to the target heat storage amount to be stored in the first heat storage tank 13 and the second heat storage tank 21 by 19:00 (that is, after a predetermined time). The operation of the heat pump device H is controlled according to the operation schedule.

このとき、制御装置Ｃは、温度センサＴ１１，Ｔ１２，Ｔ１３，Ｔ１４，Ｔ１５の測定結果に基づいて、第１蓄熱タンク１３での現在の蓄熱量を導出できる。加えて、制御装置Ｃは、燃料電池１１を例えば定格出力などの所定出力で単位時間だけ運転したときに第１蓄熱タンク１３に追加で蓄えることができる蓄熱量に関する情報が記憶装置６に記憶されていれば、所定時間後まで燃料電池１１を所定出力で連続運転することで第１蓄熱タンク１３に追加で蓄えることができる予測第１蓄熱量を導出できる。つまり、第１蓄熱タンク１３での現在の蓄熱量と予測第１蓄熱量との合計が、所定時間後までに第１蓄熱タンク１３から第２蓄熱タンク２１へと移送可能な移送可能熱量になる。 At this time, the control device C can derive the current heat storage amount in the first heat storage tank 13 based on the measurement results of the temperature sensors T11, T12, T13, T14, and T15. In addition, the control device C stores in the storage device 6 information on the amount of heat storage that can be additionally stored in the first heat storage tank 13 when the fuel cell 11 is operated at a predetermined output such as a rated output for a unit time. If so, the predicted first heat storage amount that can be additionally stored in the first heat storage tank 13 can be derived by continuously operating the fuel cell 11 at a predetermined output until after a predetermined time. That is, the sum of the current heat storage amount in the first heat storage tank 13 and the predicted first heat storage amount becomes the transferable heat amount that can be transferred from the first heat storage tank 13 to the second heat storage tank 21 by a predetermined time. ..

以上の結果、制御装置Ｃは、目標蓄熱量から、第２蓄熱タンク２１での現在蓄熱量と移送可能量とを減算することで、不足蓄熱量を導出できる。加えて、制御装置Ｃは、ヒートポンプ装置Ｈの圧縮機２３を駆動する電動機を定格出力で単位時間だけ運転したときに第２蓄熱タンク２１に追加で蓄えることができる蓄熱量に関する情報が記憶装置６に記憶されていれば、ヒートポンプ装置Ｈの運転によりその不足蓄熱量に相当する熱量を発生するのに要する必要運転期間を導出できる。そして、制御装置Ｃは、将来の所定時間後に到達した時点でヒートポンプ装置Ｈの運転によりその不足蓄熱量に相当する熱量が第２蓄熱タンク２１に追加で貯えられているようにヒートポンプ装置Ｈの運転スケジュールを決定すればよい。 As a result of the above, the control device C can derive the insufficient heat storage amount by subtracting the current heat storage amount in the second heat storage tank 21 and the transferable amount from the target heat storage amount. In addition, the control device C stores information on the amount of heat storage that can be additionally stored in the second heat storage tank 21 when the electric motor that drives the compressor 23 of the heat pump device H is operated at the rated output for a unit time. If it is stored in, the required operation period required to generate the heat amount corresponding to the insufficient heat storage amount by the operation of the heat pump device H can be derived. Then, the control device C operates the heat pump device H so that the heat amount corresponding to the insufficient heat storage amount is additionally stored in the second heat storage tank 21 by the operation of the heat pump device H when it reaches after a predetermined time in the future. All you have to do is decide on a schedule.

〔蓄熱媒体の移送処理〕
制御装置Ｃは、第１蓄熱タンク１３から第２蓄熱タンク２１への蓄熱媒体の移送処理を制御する。具体的には、制御装置Ｃは、所定の熱移送条件が満たされると移送処理を実行し、当該移送処理を実行した後は次に熱移送条件が満たされるまでは移送処理を実行しない。つまり、第１蓄熱タンク１３に貯えられた高温の蓄熱媒体が常に第２蓄熱タンク２１に移送され続けるのではなく、所定の熱移送条件が満たされたときにのみ第２蓄熱タンク２１に移送される。その結果、蓄熱媒体移送路１５を流れている蓄熱媒体からの放熱が発生し、蓄熱媒体を移送するための動力が必要になるのは、移送処理が実行されている間だけになる。
以下に、熱移送条件の例について説明する。 [Transfer processing of heat storage medium]
The control device C controls the transfer process of the heat storage medium from the first heat storage tank 13 to the second heat storage tank 21. Specifically, the control device C executes the transfer process when a predetermined heat transfer condition is satisfied, and does not execute the transfer process until the next heat transfer condition is satisfied after the transfer process is executed. That is, the high-temperature heat storage medium stored in the first heat storage tank 13 is not always continuously transferred to the second heat storage tank 21, but is transferred to the second heat storage tank 21 only when a predetermined heat transfer condition is satisfied. To. As a result, heat is dissipated from the heat storage medium flowing through the heat storage medium transfer path 15, and power for transferring the heat storage medium is required only while the transfer process is being executed.
An example of heat transfer conditions will be described below.

〔熱移送条件ａ〕
制御装置Ｃは、第１蓄熱タンク１３での蓄熱量が第１上限値以上になると熱移送条件ａが満たされたと判定する。本実施形態では、一定温度（目標温度）の蓄熱媒体が第１蓄熱タンク１３に貯えられる構成を採用しているので、その目標温度の蓄熱媒体が所定量以上貯えられた状態になると、第１蓄熱タンク１３での蓄熱量が第１上限値以上になったと見なすことができる。例えば、制御装置Ｃは、第１蓄熱タンク１３に目標温度の蓄熱媒体の量が第１上限量（例えば２５Ｌ）以上貯えられると、第１蓄熱タンク１３での蓄熱量が第１上限値以上になった、即ち、熱移送条件ａが満たされたと判定する。本実施形態では、温度センサＴ１４は、第１蓄熱タンク１３の頂部からの容積が２５Ｌの位置に設けられているので、制御装置Ｃは、温度センサＴ１１，Ｔ１２，Ｔ１３，Ｔ１４で測定される蓄熱媒体の温度が目標温度以上であると、第１蓄熱タンク１３での蓄熱量が第１上限値以上になったと判定する。 [Heat transfer condition a]
The control device C determines that the heat transfer condition a is satisfied when the amount of heat stored in the first heat storage tank 13 becomes equal to or higher than the first upper limit value. In the present embodiment, the heat storage medium having a constant temperature (target temperature) is stored in the first heat storage tank 13, so that when the heat storage medium having the target temperature is stored in a predetermined amount or more, the first heat storage medium is stored. It can be considered that the amount of heat stored in the heat storage tank 13 has reached the first upper limit value or more. For example, in the control device C, when the amount of the heat storage medium having the target temperature is stored in the first heat storage tank 13 by the first upper limit amount (for example, 25 L) or more, the heat storage amount in the first heat storage tank 13 becomes the first upper limit value or more. That is, it is determined that the heat transfer condition a is satisfied. In the present embodiment, the temperature sensor T14 is provided at a position where the volume from the top of the first heat storage tank 13 is 25 L, so that the control device C is the heat storage measured by the temperature sensors T11, T12, T13, T14. When the temperature of the medium is equal to or higher than the target temperature, it is determined that the amount of heat stored in the first heat storage tank 13 is equal to or higher than the first upper limit value.

このとき、制御装置Ｃは、移送処理において、第１蓄熱タンク１３から第２蓄熱タンク２１へ、第１蓄熱タンク１３の容積の５０％以上の所定移送量の蓄熱媒体を移送する。例えば、本実施形態のように第１蓄熱タンク１３の容積が３０Ｌであり且つ目標温度の蓄熱媒体の量が第１上限量（２５Ｌ）以上貯えられている場合、上記所定移送量はその第１上限量（２５Ｌ）に設定できる。つまり、制御装置Ｃは、温度センサＴ１１，Ｔ１２，Ｔ１３，Ｔ１４の測定結果を参照して、目標温度の蓄熱媒体が２５Ｌ貯えられた判定したときに、ポンプＰ３を動作させてその２５Ｌの蓄熱媒体を全て第２蓄熱タンク２１へと移送する。 At this time, in the transfer process, the control device C transfers a heat storage medium having a predetermined transfer amount of 50% or more of the volume of the first heat storage tank 13 from the first heat storage tank 13 to the second heat storage tank 21. For example, when the volume of the first heat storage tank 13 is 30 L and the amount of the heat storage medium at the target temperature is stored in an amount of the first upper limit amount (25 L) or more as in the present embodiment, the predetermined transfer amount is the first. It can be set to the upper limit amount (25L). That is, when the control device C refers to the measurement results of the temperature sensors T11, T12, T13, and T14 and determines that 25 L of the heat storage medium having the target temperature has been stored, the control device C operates the pump P3 to operate the 25 L heat storage medium. Is transferred to the second heat storage tank 21.

或いは、第２蓄熱タンク２１での蓄熱量に応じて、第１蓄熱タンク１３から第２蓄熱タンク２１への移送量を設定してもよい。例えば、制御装置Ｃは、移送処理において、第２蓄熱タンク２１での蓄熱量が少ないほど所定移送量を大きい値に設定する。つまり、第２蓄熱タンク２１での蓄熱量が少ないときには第１蓄熱タンク１３から第２蓄熱タンク２１へと相対的に多量の蓄熱媒体が移送され、第２蓄熱タンク２１での蓄熱量が多いときには第１蓄熱タンク１３から第２蓄熱タンク２１へと相対的に少量の蓄熱媒体が移送される。 Alternatively, the transfer amount from the first heat storage tank 13 to the second heat storage tank 21 may be set according to the heat storage amount in the second heat storage tank 21. For example, in the transfer process, the control device C sets the predetermined transfer amount to a larger value as the heat storage amount in the second heat storage tank 21 is smaller. That is, when the amount of heat storage in the second heat storage tank 21 is small, a relatively large amount of heat storage medium is transferred from the first heat storage tank 13 to the second heat storage tank 21, and when the amount of heat storage in the second heat storage tank 21 is large. A relatively small amount of heat storage medium is transferred from the first heat storage tank 13 to the second heat storage tank 21.

〔熱移送条件ｂ〕
制御装置Ｃは、第１蓄熱タンク１３での蓄熱量が第１上限値未満の第１下限値以上であり且つ第２蓄熱タンク２１での蓄熱量が第２下限値未満になると熱移送条件ｂが満たされたと判定する。
本実施形態のように、一定温度（目標温度）の蓄熱媒体が第１蓄熱タンク１３に貯えられる構成を採用しているので、第１蓄熱タンク１３に貯えられている目標温度の蓄熱媒体が所定量以上になると、第１蓄熱タンク１３での蓄熱量が第１下限値以上になったと見なすこともできる。例えば、制御装置Ｃは、第１蓄熱タンク１３に貯えられている目標温度の蓄熱媒体の量が第１下限量（例えば５Ｌ）以上になると、第１蓄熱タンク１３での蓄熱量が第１下限値以上になったと判定する。本実施形態では、温度センサＴ１２は、第１蓄熱タンク１３の頂部からの容積が５Ｌの位置に設けられているので、制御装置Ｃは、温度センサＴ１１，Ｔ１２で測定される蓄熱媒体の温度が目標温度以上であると、第１蓄熱タンク１３での蓄熱量が第１下限値以上になったと判定する。 [Heat transfer condition b]
When the heat storage amount in the first heat storage tank 13 is equal to or more than the first lower limit value less than the first upper limit value and the heat storage amount in the second heat storage tank 21 becomes less than the second lower limit value, the control device C has the heat transfer condition b. Is determined to be satisfied.
Since the heat storage medium having a constant temperature (target temperature) is stored in the first heat storage tank 13 as in the present embodiment, the heat storage medium having the target temperature stored in the first heat storage tank 13 is used. When it becomes more than a certain amount, it can be considered that the amount of heat stored in the first heat storage tank 13 becomes more than the first lower limit value. For example, in the control device C, when the amount of the heat storage medium at the target temperature stored in the first heat storage tank 13 becomes the first lower limit amount (for example, 5 L) or more, the heat storage amount in the first heat storage tank 13 becomes the first lower limit. It is judged that the value is exceeded. In the present embodiment, the temperature sensor T12 is provided at a position where the volume from the top of the first heat storage tank 13 is 5 L, so that the control device C has the temperature of the heat storage medium measured by the temperature sensors T11 and T12. When the temperature is equal to or higher than the target temperature, it is determined that the amount of heat stored in the first heat storage tank 13 is equal to or higher than the first lower limit value.

また、本実施形態のように、一定温度（目標温度）の蓄熱媒体が第２蓄熱タンク２１に貯えられる構成を採用しているので、第２蓄熱タンク２１に貯えられている目標温度の蓄熱媒体が所定量未満になると、第２蓄熱タンク２１での蓄熱量が第２下限値未満になったと見なすこともできる。例えば、制御装置Ｃは、第２蓄熱タンク２１に貯えられている目標温度の蓄熱媒体の量が第２下限量（例えば１０Ｌ）未満になると、第２蓄熱タンク２１での蓄熱量が第２下限値未満になったと判定する。本実施形態では、温度センサＴ２２は、第２蓄熱タンク２１の頂部からの容積が１０Ｌの位置に設けられているので、制御装置Ｃは、温度センサＴ２２で測定される蓄熱媒体の温度が目標温度未満であると、第２蓄熱タンク２１での蓄熱量が第２下限値未満になったと判定する。 Further, as in the present embodiment, since the heat storage medium having a constant temperature (target temperature) is stored in the second heat storage tank 21, the heat storage medium having the target temperature stored in the second heat storage tank 21 is adopted. When is less than the predetermined amount, it can be considered that the heat storage amount in the second heat storage tank 21 is less than the second lower limit value. For example, in the control device C, when the amount of the heat storage medium at the target temperature stored in the second heat storage tank 21 becomes less than the second lower limit amount (for example, 10 L), the heat storage amount in the second heat storage tank 21 becomes the second lower limit. It is determined that the value is less than the value. In the present embodiment, the temperature sensor T22 is provided at a position where the volume from the top of the second heat storage tank 21 is 10 L. Therefore, in the control device C, the temperature of the heat storage medium measured by the temperature sensor T22 is the target temperature. If it is less than, it is determined that the amount of heat stored in the second heat storage tank 21 is less than the second lower limit value.

以上のように、本実施形態において制御装置Ｃは、第１蓄熱タンク１３に貯えられている目標温度の蓄熱媒体の量が第１下限量（例えば５Ｌ）以上であり且つ第２蓄熱タンク２１に貯えられている目標温度の蓄熱媒体の量が第２下限量（例えば１０Ｌ）未満であると、熱移送条件ｂが満たされたと判定する。 As described above, in the control device C in the present embodiment, the amount of the heat storage medium having the target temperature stored in the first heat storage tank 13 is equal to or more than the first lower limit amount (for example, 5 L) and the second heat storage tank 21 has a heat storage medium. When the amount of the stored heat storage medium at the target temperature is less than the second lower limit amount (for example, 10 L), it is determined that the heat transfer condition b is satisfied.

このとき、制御装置Ｃは、移送処理において、第１蓄熱タンク１３から第２蓄熱タンク２１へ、第１蓄熱タンク１３の容積の５０％未満の所定移送量の蓄熱媒体を移送する。上述の例のように、第１蓄熱タンク１３の容積が３０Ｌであり且つ貯えられている目標温度の蓄熱媒体の量が第１下限量（５Ｌ）以上である場合、上記所定移送量はその第１下限量（５Ｌ）に設定できる。つまり、制御装置Ｃは、温度センサＴ１１，Ｔ１２の測定結果を参照して、第１蓄熱タンク１３に５Ｌ以上の目標温度の蓄熱媒体が貯えられ且つ第２蓄熱タンク２１に第２下限量（１０Ｌ）未満の目標温度の蓄熱媒体が貯えられていると判定したときに、ポンプＰ３を動作させてその５Ｌの蓄熱媒体を第２蓄熱タンク２１へと移送する。このように、第２蓄熱タンク２１の蓄熱量が少ない場合には、少量であっても第１蓄熱タンク１３から第２蓄熱タンク２１へと蓄熱媒体を移送できる。 At this time, in the transfer process, the control device C transfers a heat storage medium having a predetermined transfer amount of less than 50% of the volume of the first heat storage tank 13 from the first heat storage tank 13 to the second heat storage tank 21. As in the above example, when the volume of the first heat storage tank 13 is 30 L and the amount of the stored heat storage medium at the target temperature is the first lower limit amount (5 L) or more, the predetermined transfer amount is the first. It can be set to 1 lower limit amount (5L). That is, in the control device C, referring to the measurement results of the temperature sensors T11 and T12, the heat storage medium having a target temperature of 5 L or more is stored in the first heat storage tank 13, and the second lower limit amount (10 L) is stored in the second heat storage tank 21. When it is determined that a heat storage medium having a target temperature lower than) is stored, the pump P3 is operated to transfer the 5 L heat storage medium to the second heat storage tank 21. As described above, when the heat storage amount of the second heat storage tank 21 is small, the heat storage medium can be transferred from the first heat storage tank 13 to the second heat storage tank 21 even if the amount is small.

尚、制御装置Ｃ、第２蓄熱タンク２１での蓄熱量が所定の条件を満たす場合、移送処理の実行を停止してもよい。例えば、制御装置Ｃは、第２蓄熱タンク２１での蓄熱量が満杯状態である場合、移送処理の実行を停止すればよい。上述した例の場合、制御装置Ｃは、温度センサＴ２１，Ｔ２２，Ｔ２３，Ｔ２４，Ｔ２５の全てで目標温度の蓄熱媒体の存在を検知したとき、第２蓄熱タンク２１での蓄熱量が満杯状態であると判定して、移送処理の実行を停止する。それにより、移送処理を実行している途中であってもその移送処理の実行を停止して、第１蓄熱タンク１３から第２蓄熱タンク２１へと移送する予定であった熱量を第１蓄熱タンク１３で蓄え続けることができる。 If the amount of heat stored in the control device C and the second heat storage tank 21 satisfies a predetermined condition, the execution of the transfer process may be stopped. For example, when the heat storage amount in the second heat storage tank 21 is full, the control device C may stop the execution of the transfer process. In the case of the above example, when the control device C detects the presence of the heat storage medium having the target temperature in all of the temperature sensors T21, T22, T23, T24, and T25, the heat storage amount in the second heat storage tank 21 is full. It is determined that there is, and the execution of the transfer process is stopped. As a result, even if the transfer process is being executed, the execution of the transfer process is stopped, and the amount of heat that was planned to be transferred from the first heat storage tank 13 to the second heat storage tank 21 is transferred to the first heat storage tank. You can continue to store at 13.

＜別実施形態＞
＜１＞
上記実施形態では、本発明の熱供給システムについて具体例を挙げて説明したが、その構成は適宜変更可能である。
例えば、第１蓄熱タンク１３及び第２蓄熱タンク２１に対する温度センサの設置個数や設置位置などは適宜変更可能である。 <Another Embodiment>
<1>
In the above embodiment, the heat supply system of the present invention has been described with reference to specific examples, but the configuration thereof can be changed as appropriate.
For example, the number and position of temperature sensors installed in the first heat storage tank 13 and the second heat storage tank 21 can be appropriately changed.

＜２＞
上記実施形態では、幾つかの数値を例示したが、それらは例示目的で記載したものであり適宜変更可能である。例えば、第１蓄熱タンク１３及び第２蓄熱タンク２１の容積、第１蓄熱タンク１３及び第２蓄熱タンク２１に貯える蓄熱媒体の温度（目標温度）、判定基準となる蓄熱媒体の量などの値を例示したが、それらは適宜変更可能である。 <2>
In the above embodiment, some numerical values are illustrated, but they are described for the purpose of illustration and can be changed as appropriate. For example, the volumes of the first heat storage tank 13 and the second heat storage tank 21, the temperature of the heat storage medium stored in the first heat storage tank 13 and the second heat storage tank 21 (target temperature), the amount of the heat storage medium as a determination standard, and the like are set. Although illustrated, they can be changed as appropriate.

＜３＞
上記実施形態では、制御装置Ｃによるヒートポンプ装置Ｈの運転スケジュールの決定手法について例示したが、他の手法でヒートポンプ装置Ｈの運転スケジュールを決定してもよい。
例えば、制御装置Ｃは、第２蓄熱タンク２１での蓄熱量に応じてヒートポンプ装置Ｈの運転スケジュールを決定できる。例えば、制御装置Ｃは、第２蓄熱タンク２１での現在の蓄熱量が下限側設定値未満になればヒートポンプ装置Ｈを運転して第２蓄熱タンク２１への蓄熱を行い、第２蓄熱タンク２１での現在の蓄熱量が上限側設定値以上になれば（例えば蓄熱量が満杯状態になれば）ヒートポンプ装置Ｈの運転を停止して第２蓄熱タンク２１への蓄熱を停止することができる。 <3>
In the above embodiment, the method of determining the operation schedule of the heat pump device H by the control device C has been exemplified, but the operation schedule of the heat pump device H may be determined by another method.
For example, the control device C can determine the operation schedule of the heat pump device H according to the amount of heat stored in the second heat storage tank 21. For example, the control device C operates the heat pump device H to store heat in the second heat storage tank 21 when the current heat storage amount in the second heat storage tank 21 becomes less than the lower limit side set value, and the second heat storage tank 21 If the current heat storage amount in (1) becomes equal to or higher than the upper limit side set value (for example, when the heat storage amount becomes full), the operation of the heat pump device H can be stopped to stop the heat storage in the second heat storage tank 21.

この場合、第２蓄熱タンク２１での現在の蓄熱量が上限側設定値以上になればヒートポンプ装置Ｈの運転が停止されるので、第２蓄熱タンク２１に蓄えられている蓄熱量を多くし過ぎない方が良い場合もある。
例えば、第１蓄熱タンク１３から第２蓄熱タンク２１への上記所定移送量を多量に設定すれば、第２蓄熱タンク２１での蓄熱余裕が無くなって、ヒートポンプ装置Ｈを運転停止しなければなくなる。それに対して、第１蓄熱タンク１３から第２蓄熱タンク２１への上記所定移送量を少量に設定すれば、第１蓄熱タンク１３での蓄熱余裕と第２蓄熱タンク２１での蓄熱余裕とを確保できる。つまり、燃料電池１１を運転することによる第１蓄熱タンク１３への蓄熱と、ヒートポンプ装置Ｈを運転することによる第２蓄熱タンク２１への蓄熱とを、共に継続させることができるので、第１蓄熱タンク１３及び第２蓄熱タンク２１での合計の蓄熱量を最大化させることができる。
このように、例えば設定期間内の近い将来に熱利用装置５で設定量以上の大きな熱需要が予測される場合、第１蓄熱タンク１３から第２蓄熱タンク２１への上記所定移送量を少量に設定すればよい。 In this case, if the current heat storage amount in the second heat storage tank 21 becomes equal to or higher than the upper limit set value, the operation of the heat pump device H is stopped, so that the heat storage amount stored in the second heat storage tank 21 is excessively increased. Sometimes it is better not to have it.
For example, if the predetermined transfer amount from the first heat storage tank 13 to the second heat storage tank 21 is set to a large amount, there is no heat storage margin in the second heat storage tank 21, and the heat pump device H must be stopped. On the other hand, if the predetermined transfer amount from the first heat storage tank 13 to the second heat storage tank 21 is set to a small amount, the heat storage margin in the first heat storage tank 13 and the heat storage margin in the second heat storage tank 21 are secured. can. That is, since the heat storage in the first heat storage tank 13 by operating the fuel cell 11 and the heat storage in the second heat storage tank 21 by operating the heat pump device H can be continued together, the first heat storage can be continued. The total amount of heat storage in the tank 13 and the second heat storage tank 21 can be maximized.
In this way, for example, when a large heat demand larger than the set amount is predicted in the heat utilization device 5 in the near future within the set period, the predetermined transfer amount from the first heat storage tank 13 to the second heat storage tank 21 is reduced to a small amount. Just set it.

＜４＞
上記実施形態では、第１蓄熱タンク１３に貯えられる蓄熱媒体の目標温度と、第２蓄熱タンク２１に貯えられる蓄熱媒体の目標温度が同じである例を説明したが、それらの目標温度は互いに異なっていてもよい。 <4>
In the above embodiment, an example has been described in which the target temperature of the heat storage medium stored in the first heat storage tank 13 and the target temperature of the heat storage medium stored in the second heat storage tank 21 are the same, but the target temperatures are different from each other. May be.

＜５＞
上記実施形態（別実施形態を含む、以下同じ）で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用でき、また、本明細書において開示された実施形態は例示であって、本発明の実施形態はこれに限定されず、本発明の目的を逸脱しない範囲内で適宜改変できる。 <5>
The configurations disclosed in the above embodiment (including other embodiments, the same shall apply hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction, and are also disclosed herein. The embodiment is an example, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.

本発明は、２つの蓄熱タンクで各別に貯えられた蓄熱媒体を、熱利用装置に対して適切に供給できる熱供給システムに利用できる。 INDUSTRIAL APPLICABILITY The present invention can be used in a heat supply system capable of appropriately supplying heat storage media separately stored in two heat storage tanks to a heat utilization device.

５熱利用装置
１０熱電併給システム
１１燃料電池（熱電併給装置）
１２排熱回収用熱交換器
１３第１蓄熱タンク
１４第１循環路
１５蓄熱媒体移送路
２０ヒートポンプシステム
２１第２蓄熱タンク
２２室内熱交換器（凝縮器）
２３圧縮機
２４室外熱交換器（蒸発器）
２５減圧弁
２６冷媒循環路
２７第２循環路
Ｃ制御装置
Ｈヒートポンプ装置 5 Heat utilization device 10 Combined heat and power system 11 Fuel cell (combined heat and power device)
12 Heat exchanger for exhaust heat recovery 13 1st heat storage tank 14 1st circulation path 15 Heat storage medium transfer path 20 Heat pump system 21 2nd heat storage tank 22 Indoor heat exchanger (condenser)
23 Compressor 24 Outdoor heat exchanger (evaporator)
25 Pressure reducing valve 26 Refrigerant circulation path 27 Second circulation path C Control device H Heat pump device

Claims

Combined heat and power supply device,
The first heat storage tank that stores the heat storage medium and
A heat exchanger for waste heat recovery to which the heat generated by the combined heat and power supply device is supplied, and
A first circulation path capable of returning the heat storage medium extracted from the first heat storage tank to the first heat storage tank via the waste heat recovery heat exchanger.
A heat pump device having a compressor that compresses the refrigerant, a condenser that dissipates heat from the refrigerant, a pressure reducing valve that depressurizes the refrigerant, and an evaporator that absorbs heat from the refrigerant.
The second heat storage tank that stores the heat storage medium and
A second circulation path capable of returning the heat storage medium extracted from the second heat storage tank to the second heat storage tank via the condenser, and
A heat storage medium transfer path capable of transferring the heat storage medium stored in the first heat storage tank to the second heat storage tank is provided.
The volume of the second heat storage tank is larger than the volume of the first heat storage tank.
The heat storage medium extracted from the second heat storage tank is supplied to the heat utilization device, and the heat storage medium is supplied to the heat utilization device.
A control device for controlling the transfer process of the heat storage medium from the first heat storage tank to the second heat storage tank is provided.
The control device executes the transfer process when a predetermined heat transfer condition is satisfied, and after executing the transfer process, does not execute the transfer process until the next heat transfer condition is satisfied.
The control device has the current heat storage amount in the second heat storage tank and the current heat storage amount in the first heat storage tank from the target heat storage amount to be stored in the first heat storage tank and the second heat storage tank after a predetermined time. The insufficient heat storage amount is derived by subtracting the heat storage amount of the above and the predicted first heat storage amount that can be additionally stored in the first heat storage tank by continuously operating the heat and power combined supply device at a predetermined output until after the predetermined time. A heat supply system that determines the operation schedule of the heat pump device so that the insufficient heat storage amount is additionally stored in the second heat storage tank by operating the heat pump device by the predetermined time .

The heat supply system according to claim 1 , wherein the control device determines that the heat transfer condition is satisfied when the amount of heat stored in the first heat storage tank becomes equal to or higher than the first upper limit value.

The second aspect of claim 2, wherein the control device transfers a heat storage medium having a predetermined transfer amount of 50% or more of the volume of the first heat storage tank from the first heat storage tank to the second heat storage tank in the transfer process. Heat supply system.

The heat supply system according to claim 3 , wherein the control device sets the predetermined transfer amount to a larger value as the heat storage amount in the second heat storage tank is smaller in the transfer process.

The control device has the heat transfer condition when the heat storage amount in the first heat storage tank is equal to or more than the first lower limit value less than the first upper limit value and the heat storage amount in the second heat storage tank becomes less than the second lower limit value. The heat supply system according to claim 1 , wherein it is determined that is satisfied.

The heat supply system according to any one of claims 1 to 5 , wherein the control device stops execution of the transfer process when the amount of heat stored in the second heat storage tank is full.