JP5404945B2

JP5404945B2 - Heat medium supply system renovation method

Info

Publication number: JP5404945B2
Application number: JP2013025571A
Authority: JP
Inventors: 宏松田
Original assignee: Takasago Thermal Engineering Co Ltd
Current assignee: Takasago Thermal Engineering Co Ltd
Priority date: 2013-02-13
Filing date: 2013-02-13
Publication date: 2014-02-05
Anticipated expiration: 2027-09-05
Also published as: JP2013122373A

Description

本発明は、温度制御された熱媒を熱負荷へ供給する熱媒供給システムに関する。 The present invention relates to a heat medium supply system that supplies a temperature-controlled heat medium to a heat load.

従来、省エネルギーのための技術として、蓄熱やフリークーリングの技術がある（特許文献１〜３を参照）。このような技術を採用した熱媒供給システムでは、空調機等の空調負荷その他の負荷に対して、上記蓄熱やフリークーリングと、冷凍機とによって温度制御された熱媒が供給される。より具体的には、冷却塔、蓄熱槽、冷凍機等の熱源、または熱源からの冷却水／冷水が循環する熱交換器によって温度制御された熱媒が、前記負荷に供給される。 Conventionally, as a technique for energy saving, there is a technique of heat storage or free cooling (see Patent Documents 1 to 3). In a heat medium supply system employing such a technique, a heat medium whose temperature is controlled by the heat storage, free cooling, and a refrigerator is supplied to an air conditioning load such as an air conditioner. More specifically, a heat medium whose temperature is controlled by a heat source such as a cooling tower, a heat storage tank, a refrigerator, or a heat exchanger in which cooling water / cold water from the heat source circulates is supplied to the load.

ここで、従来、前記複数種類の熱源は、配管系統ごとに独立して、或いは切り替えて運転されることが多かった。これは、各熱源によって温度制御される熱媒の温度が異なっているためである（特許文献４〜６を参照）。
なお、負荷が必要とする冷却能力を複数台の冷凍機に分割して台数制御する技術がある（特許文献７および８を参照）。 Here, conventionally, the plurality of types of heat sources are often operated independently or switched for each piping system. This is because the temperature of the heat medium whose temperature is controlled by each heat source is different (see Patent Documents 4 to 6).
In addition, there exists a technique of dividing the cooling capacity required for the load into a plurality of refrigerators and controlling the number of units (see Patent Documents 7 and 8).

特開昭６１−１２８０４２号公報JP 61-128042 A 特開平１１−３０４３８４号公報Japanese Patent Laid-Open No. 11-304384 特許第３２６０８９４号公報Japanese Patent No. 3260894 特開２００３−１２１０２４号公報Japanese Patent Laid-Open No. 2003-121024 特許第３５７９８２１号公報Japanese Patent No. 3579821 特許第３８５６５６８号公報Japanese Patent No. 3856568 特開２００６−２０７８５５号公報JP 2006-207855 A 特許第３４０５４２６号公報Japanese Patent No. 3405426

上記のように熱源の種類ごとに配管系統が独立している方式では、夫々の系統に接続された負荷の状況に基づいて熱媒の流量が制御され、あるいは熱媒の温度制御の目標温度が熱源ごとに個別に設定される。すると、ある系では熱源機が最大負荷で稼動する一方、他の熱源機では余裕があるという運転状態が常態となる。このようなシステムで能力不足を招かぬようにしようとすると、設備容量の大きい熱源機や蓄熱槽を採用せざるを得ない。 As described above, in the system in which the piping system is independent for each type of heat source, the flow rate of the heat medium is controlled based on the state of the load connected to each system, or the target temperature of the temperature control of the heat medium is set. Set individually for each heat source. Then, while a heat source machine operates with the maximum load in a certain system, an operation state in which there is a margin in other heat source machines becomes a normal state. In order to prevent a shortage of capacity in such a system, a heat source machine or a heat storage tank with a large equipment capacity must be employed.

本発明は、上記した問題に鑑み、異なる温度制御方式を用いる複数の熱源をあたかも１台の熱源機のように扱い、高効率で運転することを課題とする。 In view of the above problems, an object of the present invention is to treat a plurality of heat sources using different temperature control methods as if they were one heat source machine and operate with high efficiency.

本発明は、上記した課題を解決するために、還流した熱媒を、夫々異なる温度制御方式の複数の温度制御部に対して分配し、分配後に温度制御された熱媒を合流させることで、異なる温度制御方式を用いる複数の熱源をあたかも１台の熱源機のように扱い、高効率で運転することを可能にした。 In order to solve the above-described problems, the present invention distributes the refluxed heat medium to a plurality of temperature control units of different temperature control methods, and merges the temperature-controlled heat medium after distribution, Multiple heat sources that use different temperature control methods are handled as if they were a single heat source machine, making it possible to operate with high efficiency.

詳細には、本発明は、温度制御された熱媒を、熱負荷との間で還流させながら供給する熱媒供給システムであって、前記熱負荷より還流した熱媒を分配する分配部と、前記分配
部によって分配された熱媒の温度を制御する複数の温度制御部と、前記複数の温度制御部によって温度制御された熱媒を合流させる合流部と、前記合流部において合流した熱媒を前記熱負荷へ供給するための供給部と、を備え、前記複数の温度制御部は、夫々異なる温度制御方式を用いて前記熱媒の温度を制御する、熱媒供給システムである。 Specifically, the present invention is a heat medium supply system that supplies a temperature-controlled heat medium while recirculating between the heat load and a distribution unit that distributes the heat medium recirculated from the heat load; A plurality of temperature control units that control the temperature of the heat medium distributed by the distribution unit, a merging unit that merges the heat mediums temperature-controlled by the plurality of temperature control units, and a heat medium that merges in the merging unit And a supply unit for supplying to the thermal load, wherein the plurality of temperature control units control the temperature of the heating medium using different temperature control methods.

ここで、熱負荷とは、熱媒供給システムから水その他の液体等の熱媒を供給される対象をいい、施設に備えられた空調設備等がこれにあたる。本発明における熱媒供給システムは、熱負荷より還流した熱媒を、夫々異なる温度制御方式を用いて熱媒の温度制御を行う複数の温度制御部に対して分配し、更に、夫々異なる温度制御方式を用いて温度制御された熱媒を、熱負荷へ供給する前に一旦合流させる。このようにすることで、本発明は、異なる温度制御方式を用いる複数の熱源をあたかも１台の熱源機のように扱うことを可能としている。また、異なる温度制御方式を用いる複数の熱源を１台の熱源機のように扱うことで、負荷側に合わせて設備容量の大きな温度制御部（熱源機、蓄熱槽等）を採用する必要がなく、高効率で運転することが可能となる。ここで、温度制御部とは、熱媒を加熱または冷却することで熱媒の温度を上下させる（制御する）装置であり、またこの装置には、加熱または冷却の能力を調節する機能が含まれてもよい。 Here, the heat load refers to a target to which a heat medium such as water or other liquid is supplied from the heat medium supply system, and corresponds to an air conditioner provided in the facility. The heating medium supply system according to the present invention distributes the heating medium recirculated from the heat load to a plurality of temperature control units that perform temperature control of the heating medium using different temperature control methods, and further controls different temperature control. The heat medium whose temperature is controlled by using the method is once joined before being supplied to the heat load. By doing in this way, the present invention makes it possible to treat a plurality of heat sources using different temperature control methods as if they were one heat source machine. In addition, by handling multiple heat sources that use different temperature control methods like a single heat source unit, there is no need to adopt a temperature control unit (heat source unit, heat storage tank, etc.) that has a large equipment capacity in accordance with the load side. It becomes possible to drive with high efficiency. Here, the temperature control unit is a device that raises or lowers (controls) the temperature of the heating medium by heating or cooling the heating medium, and this device includes a function of adjusting the heating or cooling ability. May be.

また、ここでいう異なる温度制御方式としては、例えば、冷凍機による温度制御方式や、冷凍機による温度制御と冷却塔による温度制御とを選択的に切り換え可能な温度制御方式、蓄熱槽からの冷水による温度制御方式、等がある。また、前記供給部は、例えば、合流部によって合流した熱媒を、複数の熱負荷系統に対して分配して供給するための複数の配管を有する。 The different temperature control methods here include, for example, a temperature control method using a refrigerator, a temperature control method capable of selectively switching between a temperature control using a refrigerator and a temperature control using a cooling tower, and cold water from a heat storage tank. Temperature control method, etc. In addition, the supply unit includes, for example, a plurality of pipes for distributing and supplying the heat medium merged by the merge unit to a plurality of heat load systems.

また、前記複数の温度制御部は、夫々の温度制御部によって温度制御された前記熱媒が、前記合流部によって合流する手前で、共通の所定の範囲内の温度となるように、前記熱媒の温度を制御してもよい。 Further, the plurality of temperature control units may be configured such that the heat medium whose temperature is controlled by each temperature control unit has a temperature within a common predetermined range before the heat medium is merged by the merge unit. The temperature may be controlled.

即ち、異なる温度制御方式を用いる温度制御部の負荷能力を一定にすることで、異なる温度制御方式を用いる温度制御部を共存させることが可能となる。また、負荷側設備には常に一定の温度の熱媒が供給されることとなるため、負荷側設備において変動する熱媒温度に対応する制御を行う必要性が低減し、負荷側設備における制御がシンプル且つ容易となる。 That is, by making the load capacity of the temperature control unit using different temperature control methods constant, it becomes possible to coexist temperature control units using different temperature control methods. In addition, since the heat medium having a constant temperature is always supplied to the load side equipment, the necessity for performing control corresponding to the temperature of the heat medium that fluctuates in the load side equipment is reduced, and control in the load side equipment is reduced. Simple and easy.

ここで、前記複数の温度制御部は、前記熱負荷より還流した熱媒の温度を、予め設定された共通の目標温度に従って制御することで、夫々の温度制御部によって温度制御された前記熱媒が、前記合流部によって合流する手前で、前記所定の範囲内の温度となるように前記熱媒の温度を制御してもよい。 Here, the plurality of temperature control units control the temperature of the heat medium recirculated from the heat load according to a preset common target temperature, so that the heat medium whose temperature is controlled by each temperature control unit. However, the temperature of the heating medium may be controlled so that the temperature is within the predetermined range before joining by the joining portion.

また、前記複数の温度制御部は、夫々に予め設定された優先順位が高い順に、温度制御を開始してもよい。ここで、優先順位は、例えば、時刻、外気条件、前記熱負荷の状況、夫々の温度制御部の運転効率、等に基づいて設定されることが好ましい。 The plurality of temperature control units may start temperature control in descending order of priority set in advance. Here, the priority order is preferably set based on, for example, time of day, outside air conditions, the state of the thermal load, the operating efficiency of each temperature control unit, and the like.

優先順位に従って運転開始を制御することで、負荷に応じて稼動する温度制御部を限定することが出来、熱媒供給システム全体の運転効率を向上させることが可能となる。特に、優先順位を温度制御部の運転効率に基づいて設定することで、熱媒供給システム全体の運転を省エネルギーとすることが出来る。 By controlling the start of operation according to the priority order, the temperature control unit that operates according to the load can be limited, and the operation efficiency of the entire heat medium supply system can be improved. In particular, by setting the priority order based on the operation efficiency of the temperature control unit, the operation of the entire heat medium supply system can be saved.

また、本発明は、前記熱負荷より還流した熱媒および前記熱負荷へ供給される熱媒を貯める蓄熱槽を有する、既設熱媒供給システムを、本発明に係る熱媒供給システムへ改修する改修方法であって、前記熱負荷より熱媒を還流させるための還流部から前記蓄熱槽への
熱媒の流れ、および前記蓄熱槽から前記供給部への熱媒の流れを止めるステップと、前記還流部と前記温度制御部との間に、閉状態の弁付き枝管を用いて前記分配部を接続し、前記供給部と前記温度制御部との間に、閉状態の弁付き枝管を用いて前記合流部を接続するステップと、前記分配部および合流部の接続後に、前記分配部および合流部を接続する前記枝管の弁を開弁することで、前記還流部から前記温度制御部への熱媒の流れ、および前記温度制御部から前記供給部への熱媒の流れを開始させるステップと、を備える、熱媒供給システムの改修方法である。 Further, the present invention provides a modification for refurbishing an existing heat medium supply system having a heat storage tank for storing a heat medium recirculated from the heat load and a heat medium supplied to the heat load into the heat medium supply system according to the present invention. A method of stopping the flow of the heat medium from the recirculation unit to recirculate the heat medium from the heat load to the heat storage tank, and the flow of the heat medium from the heat storage tank to the supply unit, The distribution unit is connected using a closed valved branch pipe between the supply unit and the temperature control unit, and a closed valved branch pipe is used between the supply unit and the temperature control unit. Connecting the merging section and, after connecting the distributing section and the merging section, opening the branch pipe connecting the distributing section and the merging section to the temperature control section from the reflux section. The flow of the heat medium and the temperature control unit to the supply unit Comprising the steps of initiating a flow of heating medium, and a repair method of the heating medium supply system.

本発明に拠れば、既設の熱媒供給システムを、管路等、既設の設備を極力残したまま、より省エネルギーな熱媒供給システムへ改修することが可能となる。 According to the present invention, it is possible to upgrade an existing heat medium supply system to a more energy-saving heat medium supply system while leaving existing facilities such as pipes as much as possible.

本発明によって、異なる温度制御方式を用いる複数の熱源をあたかも１台の熱源機のように扱い、高効率で運転することが可能となる。 According to the present invention, it is possible to operate a plurality of heat sources using different temperature control methods as if they were one heat source unit and operate with high efficiency.

実施形態における、改修対象の既設熱媒供給システムの概略構成を示す図である。It is a figure which shows schematic structure of the existing heat-medium supply system of the repair object in embodiment. 実施形態に係る熱媒供給システムの概略構成を示す図である。It is a figure showing the schematic structure of the heat carrier supply system concerning an embodiment. 実施形態における改修前のシステムの概略を示す図である。It is a figure which shows the outline of the system before repair in embodiment. 実施形態における、既設熱媒供給システムを改修する流れを示すフローチャートである。It is a flowchart which shows the flow which renovates the existing heat-medium supply system in embodiment. 実施形態における、既設熱媒供給システムにヘッダ装置を設置した状態の概略構成を示す図である。It is a figure which shows schematic structure of the state which installed the header apparatus in the existing heat-medium supply system in embodiment. 実施形態における、熱媒供給システムに弁付き枝管を介してヘッダ装置が接続された状態の概略構成を示す図である。It is a figure which shows schematic structure of the state in which the header apparatus was connected to the heat-medium supply system in embodiment via the branch pipe with a valve.

本発明に係る熱媒供給システムおよび熱媒供給システムの改修方法の実施の形態について、図面に基づいて説明する。
＜既設熱媒供給システムの構成＞
図１は、本実施形態における、改修対象の既設熱媒供給システム１ｂの概略構成を示す図である。図１に示す既設熱媒供給システム１ｂは、冷却塔１１からの冷却水を用いた冷凍機１２による温度制御と冷却塔１１によるフリークーリングとを切替可能な切替式温度制御部１０、および冷却塔２１、３１からの冷却水を用いた冷凍機２２、３２ｂによる温度制御を行う冷凍機式温度制御部２０、３０ｂを有する。なお、図中では夫々の温度制御部について冷凍機と冷却塔との組み合わせが一組ずつ示されているが、各温度制御部は、冷凍機と冷却塔との組み合わせを二組以上有してもよい。 DESCRIPTION OF EMBODIMENTS Embodiments of a heat medium supply system and a heat medium supply system repair method according to the present invention will be described with reference to the drawings.
<Configuration of existing heating medium supply system>
FIG. 1 is a diagram showing a schematic configuration of an existing heat medium supply system 1b to be repaired in the present embodiment. An existing heat medium supply system 1b shown in FIG. 1 includes a switchable temperature control unit 10 capable of switching between temperature control by a refrigerator 12 using cooling water from a cooling tower 11 and free cooling by the cooling tower 11, and a cooling tower. Refrigerating machine type temperature control units 20 and 30b for performing temperature control by the refrigerators 22 and 32b using the cooling water from 21 and 31 are provided. In the figure, each combination of a refrigerator and a cooling tower is shown for each temperature control unit, but each temperature control unit has two or more combinations of a refrigerator and a cooling tower. Also good.

また、既設熱媒供給システム１ｂは、負荷より還流した熱媒を通す還流配管５０と、還流配管５０を通って還流した熱媒が貯められる水蓄熱槽４０と、蓄熱槽４０から熱媒を負荷の各系統へ供給する供給配管６０と、を備える。既設熱媒供給システム１ｂにおいて温度制御された熱媒は、全て水蓄熱槽４０に蓄えられ、負荷には常に水蓄熱槽４０からの熱媒が供給される。なお、各管路の水蓄熱槽４０への出入口近傍には開閉弁４１、４２が取り付けられている。また、既設熱媒供給システム１ｂは、既設熱媒供給システム１ｂが備える冷却塔や冷凍機、ポンプ、弁、等を制御する制御装置９０を備える。 Further, the existing heat medium supply system 1b includes a reflux pipe 50 through which the heat medium refluxed from the load, a water heat storage tank 40 in which the heat medium refluxed through the reflux pipe 50 is stored, and a heat medium loaded from the heat storage tank 40. And supply piping 60 to be supplied to each system. All of the heat medium whose temperature is controlled in the existing heat medium supply system 1b is stored in the water heat storage tank 40, and the heat medium from the water heat storage tank 40 is always supplied to the load. In addition, on-off valves 41 and 42 are attached in the vicinity of the entrance to the water heat storage tank 40 of each pipe line. The existing heat medium supply system 1b includes a control device 90 that controls a cooling tower, a refrigerator, a pump, a valve, and the like included in the existing heat medium supply system 1b.

本実施形態に係る既設熱媒供給システム１ｂが設置されている施設（図示は省略する）は、負荷側系統として常時稼動する電子機器や通信機器が設置されるＡ棟と、事務棟であるＢ棟とを有する。負荷側系統は５系統あり、このうち３系統はＡ棟へ熱媒を供給する系
統である。Ａ棟においては、空調の停止は電子機器や通信機器の故障につながるため２４時間の空調が必要となる。なお残りの２系統によって熱媒が供給されるＢ棟にも２４時間系統があるが、これは保安施設や警備員の滞在のための系統であるため、１日程度の停止は設備にとって許容可能な範囲内である。 The facility (not shown) in which the existing heat medium supply system 1b according to the present embodiment is installed includes a building A in which electronic devices and communication devices that are constantly operating as load side systems are installed, and a building B that is an office building. It has a wing. There are five load side systems, and three of these are systems for supplying a heat medium to the A building. In the building A, stopping air conditioning leads to failure of electronic equipment and communication equipment, so 24 hours of air conditioning is required. There is also a 24-hour system in building B where the heat medium is supplied by the remaining two systems, but this is a system for the stay of security facilities and security guards, so it is acceptable for the equipment to stop for about a day. It is in the range.

＜熱媒供給システムの構成＞
図２は、本実施形態に係る熱媒供給システム１の概略構成を示す図である。図２に示す熱媒供給システム１は、図１に示した既設熱媒供給システム１ｂを改修したものであり、切替式温度制御部１０、冷凍機式温度制御部２０、および蓄熱式温度制御部３０を備える。なお、図２において図１と同一の符号が付された構成は、改修前の既設熱媒供給システム１ｂと共通する構成である。 <Configuration of heat medium supply system>
FIG. 2 is a diagram illustrating a schematic configuration of the heat medium supply system 1 according to the present embodiment. The heating medium supply system 1 shown in FIG. 2 is a modification of the existing heating medium supply system 1b shown in FIG. 1, and includes a switchable temperature control unit 10, a refrigerator type temperature control unit 20, and a heat storage type temperature control unit. 30. In addition, the structure to which the code | symbol same as FIG. 1 was attached | subjected in FIG. 2 is a structure which is common with the existing heat-medium supply system 1b before repair.

切替式温度制御部１０は、冷却塔１１からの冷却水を用いた冷凍機１２による温度制御と冷却塔によるフリークーリングとを切替可能な温度制御部であり、冷凍機式温度制御部２０は、冷却塔２１との間で循環する冷却水を排熱の放熱のために用いた冷凍機２２による温度制御を行う温度制御部である。なお、冷却塔２１は、冷却塔１１と異なり、熱負荷に対して冷熱を供給する管路を備えない。また、蓄熱式温度制御部３０は、冷却塔３１と冷凍機３２を用いて氷蓄熱槽３３に蓄熱を行い（蓄熱運転）、氷蓄熱槽３３から取水した冷水と熱媒とを熱交換器３４で熱交換する（放熱運転）温度制御部であり、本実施形態では、冷凍機３２として製氷用のブライン冷凍機３２を採用している。なお、各温度制御部は、冷凍機と冷却塔との組み合わせを二組以上有してもよい。二組以上の冷凍機と冷却塔との組み合わせを有することで、各温度制御部は、冷凍機または冷却塔の稼動台数を制御することによって、温度制御部の能力を制御することが出来る。 The switching type temperature control unit 10 is a temperature control unit capable of switching between temperature control by the refrigerator 12 using cooling water from the cooling tower 11 and free cooling by the cooling tower. It is a temperature control part which performs temperature control with the refrigerator 22 which used the cooling water circulated between the cooling towers 21 for heat dissipation of exhaust heat. Unlike the cooling tower 11, the cooling tower 21 does not include a pipe line that supplies cold heat to the heat load. Further, the heat storage type temperature control unit 30 stores heat in the ice heat storage tank 33 using the cooling tower 31 and the refrigerator 32 (heat storage operation), and the cold water taken from the ice heat storage tank 33 and the heat medium are transferred to the heat exchanger 34. In this embodiment, the ice making brine refrigerator 32 is adopted as the refrigerator 32. Each temperature control unit may have two or more combinations of refrigerators and cooling towers. By having a combination of two or more sets of refrigerators and cooling towers, each temperature control unit can control the capacity of the temperature control unit by controlling the number of operating refrigerators or cooling towers.

本実施形態では、切替式温度制御部１０、冷凍機式温度制御部２０および蓄熱式温度制御部３０を備えることで、放熱運転＋冷凍機運転、放熱運転＋フリークーリング、放熱運転＋フリークーリング＋冷凍機運転、冷凍機運転のみ、冷凍機運転＋フリークーリング、等の様々な運転モードを実現することが出来、負荷に応じて柔軟に運用することが可能である。 In the present embodiment, the switching type temperature control unit 10, the refrigerator type temperature control unit 20, and the heat storage type temperature control unit 30 are provided, so that the heat radiation operation + the refrigerator operation, the heat radiation operation + free cooling, the heat radiation operation + free cooling + Various operation modes such as refrigerator operation, refrigerator operation only, refrigerator operation + free cooling, etc. can be realized, and it is possible to operate flexibly according to the load.

また、熱媒供給システム１は、負荷より還流した熱媒を通す還流配管５０と、還流配管５０を通って還流した熱媒を合流させた上で上記各温度制御部１０、２０、３０へ分配する第一ヘッダ装置５１と、を備える。第一ヘッダ装置５１で合流した負荷からの還水は、対応する弁を介して３系統に分流し、上記の切替式温度制御部１０、冷凍機式温度制御部２０、蓄熱式温度制御部３０に送られる。 The heating medium supply system 1 distributes the heating medium refluxed from the load and the heating medium refluxed through the refluxing pipe 50 to the temperature control units 10, 20, and 30. First header device 51. The return water from the load merged in the first header device 51 is divided into three systems through corresponding valves, and the above-described switchable temperature controller 10, refrigerator temperature controller 20, and regenerative temperature controller 30. Sent to.

仮に、全ての冷却塔を統合してしまうと、冷却水が低温になりすぎ冷凍機が停止するおそれがある。また、フリークーリングを利用する際には、冷凍機１２周りの弁を閉じて冷凍機１２を停止する一方、冷却塔１１周りの弁を開いて冷却塔１１の運転を開始した後冷却水温度が定常状態になるまで時間がかかることから、切替式温度制御部１０からの熱媒供給が中断されることになる。そこで本実施形態では、還流した熱媒を３系統に分流し、且つ蓄熱式温度制御部３０をベースに運転することで、間欠運転に陥ることを排して連続的に蓄熱することを可能としている。なお、フリークーリング可能な時期であっても蓄熱設備をバッファとして活用する構成とすることで、年間を通して蓄熱運転を行うことが条件となる電力会社との蓄熱契約を可能としている。 If all the cooling towers are integrated, the cooling water becomes too cold and the refrigerator may stop. Further, when using free cooling, the valve around the refrigerator 12 is closed and the refrigerator 12 is stopped, while the valve around the cooling tower 11 is opened and the operation of the cooling tower 11 is started. Since it takes time to reach a steady state, the supply of the heat medium from the switchable temperature control unit 10 is interrupted. Therefore, in the present embodiment, the recirculated heat medium is divided into three systems and operated based on the heat storage type temperature control unit 30, thereby enabling continuous heat storage without causing intermittent operation. Yes. In addition, even if it is the time when free cooling is possible, it is possible to make a heat storage contract with an electric power company that requires heat storage operation throughout the year by using the heat storage equipment as a buffer.

更に、熱媒供給システム１は、各温度制御部によって温度制御された熱媒を合流させる第二ヘッダ装置６１および第三ヘッダ装置６２と、合流した熱媒を負荷の各系統へ分配して供給する供給配管６０と、を備える。上述の通り、負荷側は大きく通信機械系統（Ａ棟）と事務棟系統（Ｂ棟）に分かれ計５系統あるが、各温度制御部によって温度制御された
熱媒は、負荷側の各系統へ供給される前に、第二ヘッダ装置６１および第三ヘッダ装置６２において一旦合流する。 Furthermore, the heat medium supply system 1 distributes and supplies the combined heat medium to each system of the load, and the second header device 61 and the third header device 62 that merge the heat medium whose temperature is controlled by each temperature control unit. Supply pipe 60 to be provided. As described above, the load side is largely divided into a communication machine system (Building A) and an office building system (Building B), and there are a total of 5 systems. However, the heat medium whose temperature is controlled by each temperature control unit is sent to each system on the load side. Before being supplied, the second header device 61 and the third header device 62 once merge.

一般に、建物で使用されるエネルギーの大部分は空調設備の動力費であるが、圧縮機等の消費エネルギー面での高性能化から、今日ではポンプの省エネルギー化が注目されるようになってきている。このため、本実施形態では、水蓄熱槽４０を有する既設熱媒供給システム１ｂを改修する際に、蓄熱式温度制御部３０において、ポンプの揚程の低減のために密閉式の配管系統への改修を行うこととした。 In general, most of the energy used in buildings is the cost of power for air conditioning equipment. However, due to high performance in terms of energy consumption such as compressors, energy savings in pumps are now attracting attention. Yes. For this reason, in the present embodiment, when the existing heat medium supply system 1b having the water heat storage tank 40 is refurbished, the regenerative temperature control unit 30 is refurbished to a sealed piping system in order to reduce the pump head. It was decided to do.

本実施形態では、冷却塔３１として、密閉管路を形成する目的で密閉型冷却塔を採用している。但し、開放式冷却塔に熱交換器を介装させ、冷却塔と熱交換器間に冷却水を循環させ、その熱交換器の一方の流路を負荷との熱媒の循環に使用することで、密閉管路を形成してもよい。これにより、温度制御部の熱源装置（冷却または加熱を行う装置）と熱負荷との間で熱媒を循環させる流路は、熱媒を大気と直接接触させない管路となる。なお、本実施形態において、蓄熱方式としてはソリッド式氷蓄熱が採用されているが、シャーベット状の氷によるリキッド式や、潜熱蓄熱材を用いる方式あるいは水蓄熱方式が採用されてもよい。熱交換器についても、本実施形態ではプレート式のものが採用されているが、任意の種類のものが採用されてよい。 In the present embodiment, a sealed cooling tower is employed as the cooling tower 31 for the purpose of forming a sealed pipeline. However, a heat exchanger is installed in the open cooling tower, cooling water is circulated between the cooling tower and the heat exchanger, and one flow path of the heat exchanger is used for circulation of the heat medium with the load. Thus, a sealed pipe line may be formed. As a result, the flow path for circulating the heat medium between the heat source device (an apparatus that performs cooling or heating) of the temperature control unit and the heat load becomes a pipe line that does not directly contact the heat medium with the atmosphere. In this embodiment, solid type ice heat storage is adopted as the heat storage method, but a liquid type using sherbet-like ice, a method using a latent heat storage material, or a water heat storage method may be adopted. As the heat exchanger, a plate type is adopted in the present embodiment, but any kind of heat exchanger may be adopted.

また、熱媒供給システム１は、熱媒供給システム１が備える冷却塔１１、２１、３１や冷凍機１２、２２、３２、ポンプ、弁、等を制御する制御装置９０を備える。制御装置９０は、図示しないセンサ類より、冷却塔や冷凍機等の運転状態、熱媒の温度、負荷側の状態、外気条件、現在の時刻等を取得し、取得された情報から把握される時刻、外気条件、熱媒が供給される負荷側の状況、各温度制御部１０、２０、３０の運転効率、等に基づいて、熱媒供給システム１が備える冷却塔１１、２１、３１のファンや冷凍機１２、２２、３２のインバータ等の駆動部、冷却塔や冷凍機に連なる管路に設けられたポンプ、弁、等を制御する。なお、本実施形態では、熱媒供給システム１は制御装置９０によって集中管理されることとなっているが、各温度制御部１０、２０、３０ごとに制御装置が設けられ、これらの制御装置が条件設定に従って連係することで全体を制御することとしてもよい。 Further, the heat medium supply system 1 includes a control device 90 that controls the cooling towers 11, 21, 31, the refrigerators 12, 22, 32, pumps, valves, and the like included in the heat medium supply system 1. The control device 90 acquires the operating state of the cooling tower, the refrigerator, etc., the temperature of the heat medium, the state on the load side, the outside air condition, the current time, etc. from the sensors (not shown), and is grasped from the acquired information. The fans of the cooling towers 11, 21, and 31 provided in the heat medium supply system 1 based on the time, the outside air conditions, the load-side situation to which the heat medium is supplied, the operation efficiency of each temperature control unit 10, 20, 30, etc. And a drive unit such as an inverter of the refrigerators 12, 22, and 32, and a pump, a valve, and the like provided in a pipe line connected to the cooling tower and the refrigerator. In the present embodiment, the heat medium supply system 1 is centrally managed by the control device 90, but a control device is provided for each temperature control unit 10, 20, and 30. It is good also as controlling the whole by linking according to condition setting.

＜熱媒供給システムの運転＞
次に、本実施形態に係る熱媒供給システム１の運転について説明する。なお、本施設では前述のように２４時間運転系統を有し、施設全体の所要冷熱量は、夏季で概ね昼に１３．２ＭＪ程度、夜に８．８ＭＪ程度であり、冬季で概ね昼に９ＭＪ程度、夜に７ＭＪ程度である。そして、フリークーリング開始の外気湿球温度は摂氏４度、停止の外気湿球温度は摂氏７．２度に設定される。 <Operation of heating medium supply system>
Next, the operation of the heat medium supply system 1 according to this embodiment will be described. As mentioned above, this facility has a 24-hour operation system, and the total amount of cooling required for the entire facility is approximately 13.2 MJ in the daytime in summer, approximately 8.8 MJ in the evening, and approximately 9 MJ in the winter in the daytime. About 7 MJ at night. Then, the outdoor wet bulb temperature at the start of free cooling is set to 4 degrees Celsius, and the stopped outdoor wet bulb temperature is set to 7.2 degrees Celsius.

まず、夏季の運転について説明する。本設備は氷蓄熱槽３３を有しているため、蓄熱を最優先の熱源とする。制御装置９０は、夜間にブライン冷凍機３２を稼動させ、設計容量の冷熱（ここでは氷）を製氷する。より具体的には、蓄熱式温度制御部３０は、午後１０時から翌日の午前８時まで蓄熱運転を行い、午前８時から午後１０時の間に放熱運転を行う。蓄熱運転の間、ブライン冷凍機３２の凝縮器にはセットとして組み合わされた冷却塔３１が運転される。前述のように２４時間系統（Ａ棟）が存在するため、夜間に蓄熱式温度制御部３０が放熱モードから蓄熱モードに切り替わると、負荷系統には冷凍機式温度制御部２０の冷凍機によって温度制御された熱媒が供給される。 First, summer driving will be described. Since this equipment has the ice heat storage tank 33, heat storage is set as the highest priority heat source. The control device 90 operates the brine refrigerator 32 at night to produce ice of design capacity (here, ice). More specifically, the heat storage type temperature control unit 30 performs a heat storage operation from 10:00 pm to 8:00 am the next day, and performs a heat radiation operation from 8:00 am to 10:00 pm. During the heat storage operation, the cooling tower 31 combined as a set is operated in the condenser of the brine refrigerator 32. Since the 24-hour system (Building A) exists as described above, when the heat storage temperature control unit 30 switches from the heat dissipation mode to the heat storage mode at night, the temperature of the load system is increased by the refrigerator of the refrigerator temperature control unit 20. A controlled heating medium is supplied.

蓄熱運転が終了した午前８時（２４時間系統以外では空調開始時に近い）になると、制御装置９０は、ブライン冷凍機３２の蒸発器と氷蓄熱槽３３内の製氷コイルを連通する管路を閉止し、放熱運転をすべく氷蓄熱槽３３と熱交換器３４を連通する管路を開放する。
熱交換器３４を出た熱媒は第二ヘッダ装置６１で他の温度制御部によって温度制御された熱媒と合流する。更に、制御装置９０は、冷凍機を運転する。蓄熱放熱の不足分は残りの冷凍機の台数制御によりまかなう。具体的には、制御装置９０は、外気温度や、生産工程および通信機器等の内部発熱負荷に応じて、まず冷凍機式温度制御部２０を順次稼動させ、負荷の増大に応じて切替式温度制御部１０の冷凍機を稼動させて熱媒を供給する。 When the heat storage operation ends at 8:00 am (close to the air conditioning start time except for the 24-hour system), the control device 90 closes the pipeline that connects the evaporator of the brine refrigerator 32 and the ice making coil in the ice heat storage tank 33. Then, the pipe connecting the ice heat storage tank 33 and the heat exchanger 34 is opened to perform the heat radiation operation.
The heat medium exiting the heat exchanger 34 joins the heat medium whose temperature is controlled by another temperature control unit in the second header device 61. Further, the control device 90 operates the refrigerator. The shortage of heat storage and heat release is covered by controlling the number of remaining refrigerators. Specifically, the control device 90 first operates the refrigerator-type temperature control unit 20 sequentially in accordance with the outside air temperature, the internal heat generation load such as the production process and communication equipment, and the switchable temperature according to the increase in the load. The refrigerator of the control unit 10 is operated to supply the heat medium.

即ち、夏季の運転においては、蓄熱式温度制御部３０による放熱運転、冷凍機式温度制御部２０による冷凍機運転、切替式温度制御部１０によるフリークーリング運転、の順に高い優先順位が設定され、制御装置９０は、この優先順位が高い温度制御部を優先的に運転させる。 That is, in summer operation, high priority is set in the order of heat radiation operation by the regenerative temperature control unit 30, refrigerator operation by the refrigerator temperature control unit 20, free cooling operation by the switchable temperature control unit 10, The control device 90 causes the temperature control unit with the higher priority to operate preferentially.

次に冬季の運転について説明する。冬季においても、やはりブライン冷凍機３２を夜間に稼動させて蓄熱運転を行う。前述の蓄熱運転終了時になると放熱運転で氷蓄熱槽３３から冷熱をくみ上げるとともにフリークーリング運転が開始され、還り熱媒は冷凍機１２を迂回して冷却塔１１で冷却され合流して負荷側に送られる。具体的には、冷凍機１２の上流の弁を閉止し、冷却塔１１の散水管に連通する弁を開放し、且つ冷却水ポンプ５４を停止してポンプ周りの弁５４を閉止する。そして、冷却塔１１の下部水槽とヘッダ６１とを連通するバイパス管の弁を開放する。 Next, winter driving will be described. Even in the winter, the brine refrigerator 32 is operated at night to perform the heat storage operation. At the end of the heat storage operation described above, the cooling heat is pumped up from the ice heat storage tank 33 by the heat radiation operation and the free cooling operation is started. The return heat medium bypasses the refrigerator 12 and is cooled by the cooling tower 11 and joined to the load side. It is done. Specifically, the valve upstream of the refrigerator 12 is closed, the valve communicating with the water spray pipe of the cooling tower 11 is opened, and the cooling water pump 54 is stopped to close the valves 54 around the pump. And the valve of the bypass pipe which connects the lower water tank of the cooling tower 11 and the header 61 is open | released.

一方、冷凍機式温度制御部２０の冷凍機２２は冬季は負荷の冷熱の不足時にのみ稼動される。例えば、蓄熱式温度制御部３０の氷蓄熱槽３３による冷熱量と切替式温度制御部１０のフリークーリング（冷却塔１１）による冷熱量が１：１になるように運転し、冷凍機式温度制御部２０の冷凍機（直進冷凍機）は停止される。 On the other hand, the refrigerator 22 of the refrigerator-type temperature control unit 20 is operated only in winter when the load is not sufficiently cooled. For example, the cold storage amount of the ice storage tank 33 of the heat storage type temperature control unit 30 and the cooling amount of free cooling (cooling tower 11) of the switching type temperature control unit 10 are operated to be 1: 1, and the refrigerator type temperature control is performed. The refrigerator (linear refrigerator) of the unit 20 is stopped.

即ち、冬季の運転においては、蓄熱式温度制御部３０による放熱運転、切替式温度制御部１０によるフリークーリング運転、冷凍機式温度制御部２０による冷凍機運転、の順に高い優先順位が設定され、制御装置９０は、この優先順位が高い温度制御部を優先的に運転させる。但し、電力会社の夜間蓄熱契約が年間を通じて蓄熱を利用しなければならない条件ではない場合、冬季は蓄熱運転を省略してもよい。 That is, in winter operation, high priority is set in the order of heat radiation operation by the regenerative temperature controller 30, free cooling operation by the switching temperature controller 10, and refrigerator operation by the refrigerator temperature controller 20. The control device 90 causes the temperature control unit with the higher priority to operate preferentially. However, if the night heat storage contract of the electric power company is not a condition that must use the heat storage throughout the year, the heat storage operation may be omitted in the winter.

最後に中間期の運転について説明する。中間期においては、制御装置９０は、フリークーリング（１０月から３月まで可能）と冷凍機と蓄冷熱の放熱を併用する。中間期の運転においては、蓄熱式温度制御部３０による放熱運転、切替式温度制御部１０によるフリークーリング運転、冷凍機式温度制御部２０による冷凍機運転、の順に高い優先順位が設定され、制御装置９０は、この優先順位が高い温度制御部を優先的に運転させる。但し、制御装置９０は、日中の熱負荷がピークとなる時間帯に氷蓄熱槽３３の冷熱を割りあてるよう運用してもよい。 Finally, the operation in the intermediate period will be described. In the interim period, the control device 90 uses free cooling (possible from October to March), a refrigerator, and heat radiation from the cold storage heat. In the operation in the intermediate period, a high priority is set in the order of heat radiation operation by the regenerative temperature control unit 30, free cooling operation by the switchable temperature control unit 10, and refrigerator operation by the refrigerator temperature control unit 20. The device 90 preferentially operates the temperature control unit having a high priority. However, the control device 90 may be operated so as to allocate the cold energy of the ice heat storage tank 33 in a time zone in which the heat load during the day is peak.

ここで、温度制御部１０、２０、３０は、熱媒が共通かつ一定の目標温度（例えば摂氏７度）となるように熱媒を温度制御する。このように制御することで、各温度制御部１０、２０、３０で温度制御された熱媒が第二ヘッダ装置６１において合流する手前で、ほぼ同一の温度（所定の温度の範囲内）となり、負荷へ供給される熱媒の温度が一定に保たれる。このため、変動する熱媒温度に対応する制御を負荷側において行う必要性が低減し、負荷側に設けられた空調設備等の制御がシンプル且つ容易になる。より具体的には、負荷側（即ち、Ａ棟およびＢ棟）に設けられた空調設備は、要求された室温へ空調を行うために、供給を受ける熱媒の温度が一定であるとの前提の下に、温度制御を行うことが可能となる。例えば、要求室温がある程度の範囲内であれば、負荷側では圧縮機の能力制御を行うことなく、ファン回転数の制御のみ、またはファン回転数の制御と制御系による熱媒流量の増減制御との組み合わせによって空調の能力を制御すること等が可能となる。 Here, the temperature control units 10, 20, and 30 control the temperature of the heating medium so that the heating medium has a common and constant target temperature (for example, 7 degrees Celsius). By controlling in this way, the heat medium whose temperature is controlled by each of the temperature control units 10, 20, 30 becomes substantially the same temperature (within a predetermined temperature range) before joining in the second header device 61, The temperature of the heating medium supplied to the load is kept constant. For this reason, the necessity of performing control corresponding to the fluctuating heat medium temperature on the load side is reduced, and control of an air conditioning facility or the like provided on the load side is simple and easy. More specifically, it is assumed that the air conditioning equipment provided on the load side (that is, Building A and Building B) has a constant temperature of the supplied heat medium in order to perform air conditioning to the required room temperature. Under this condition, it becomes possible to perform temperature control. For example, if the required room temperature is within a certain range, the load side does not control the compressor capacity, but only the fan speed control, or the fan speed control and the heat medium flow rate increase / decrease control by the control system. It becomes possible to control the capacity of the air conditioning by the combination of the above.

また、制御装置９０は、熱媒を設定された共通かつ一定の目標温度へ制御可能な温度制御部のみを運転させ、設定された目標温度へ制御できない温度制御部を停止することで、各温度制御部１０、２０、３０からバラバラの温度に制御された熱媒が供給されることを防止し、エネルギー消費の効率を向上させることが可能となる。以下、各温度制御部１０、２０、３０が熱媒の温度を共通かつ一定の目標温度となるように制御する方法を説明する。 In addition, the control device 90 operates only the temperature control unit that can control the heat medium to the set common and constant target temperature, and stops the temperature control unit that cannot be controlled to the set target temperature. It is possible to prevent the supply of the heating medium controlled to the different temperatures from the control units 10, 20, and 30, and to improve the energy consumption efficiency. Hereinafter, a method for controlling the temperature of the heat medium so that the temperature control units 10, 20, and 30 have a common and constant target temperature will be described.

フリークーリングを行っている切替式温度制御部１０は、温度センサ（図示は省略する）を用いて冷却塔１１からの熱媒の温度および／または冷却塔１１に入る熱媒の温度を検知し、検知された熱媒の温度に応じて冷却塔における散水量（ポンプ回転数）と冷却塔のファンを制御することで、冷却水を目標温度に保つことが出来る。外気が低温であるために冷却水の温度が下がりすぎてしまう虞がある場合には、戻り冷却水の一部を図示しないバイパス流路へ流すことで冷却塔をバイパスし、冷却塔によって目標温度未満まで低温化された冷却水と混合することで、冷却水の温度を目標温度へ制御する。 The switchable temperature controller 10 performing free cooling detects the temperature of the heat medium from the cooling tower 11 and / or the temperature of the heat medium entering the cooling tower 11 using a temperature sensor (not shown), The cooling water can be maintained at the target temperature by controlling the amount of water spray (pump rotation speed) in the cooling tower and the cooling tower fan in accordance with the detected temperature of the heat medium. If there is a possibility that the temperature of the cooling water will fall too much because the outside air is low temperature, the cooling tower is bypassed by flowing a part of the return cooling water to a bypass passage (not shown), and the target temperature is The temperature of the cooling water is controlled to the target temperature by mixing with the cooling water that has been cooled to less than the temperature.

冷凍機運転を行っている切替式温度制御部１０および冷凍機式温度制御部２０は、温度センサ（図示は省略する）を用いて冷凍機からの熱媒の温度および／または冷凍機に入る熱媒の温度を検知し、検知された熱媒の温度に応じて圧縮機等の駆動部を制御することで、冷凍機自身の能力を制御し、熱媒の温度を目標温度へ制御することが出来る。なお、誤差調整のために、熱媒の一部を図示しないバイパス流路へ流すことで冷凍機をバイパスし、冷凍機によって温度制御された熱媒と混合することで温度制御を行ってもよい。この他、変流量方式では、ポンプの流量制御が採用されてもよい。 The switchable temperature control unit 10 and the refrigerator type temperature control unit 20 performing the refrigerator operation use a temperature sensor (not shown) and the temperature of the heat medium from the refrigerator and / or the heat entering the refrigerator. By detecting the temperature of the medium and controlling the drive unit such as the compressor according to the detected temperature of the heat medium, the capacity of the refrigerator itself can be controlled, and the temperature of the heat medium can be controlled to the target temperature. I can do it. In order to adjust the error, the temperature control may be performed by bypassing the refrigerator by flowing a part of the heat medium to a bypass passage (not shown) and mixing with the heat medium whose temperature is controlled by the refrigerator. . In addition, the flow rate control of the pump may be employed in the variable flow rate method.

蓄熱式温度制御部３０は、温度センサ（図示は省略する）を用いて熱交換器３４からの熱媒の温度および／または熱交換器３４に入る熱媒の温度を検知し、検知された熱媒の温度に応じて氷蓄熱槽３３のポンプによる汲み上げ量を制御することで、熱媒の温度を目標温度へ制御することが出来る。熱交換器３４において放熱した冷水が氷蓄熱槽３３に戻されて昇温するため、例えば、負荷が小さい時間帯（朝など）には汲み上げ量を少量とし、負荷がピークとなる時間帯（２時頃など）には汲み上げ量を最大とし、蓄熱（氷）を使い切ると（夕刻など）氷蓄熱槽３３からの汲み上げを取りやめて蓄熱運転へ移行する。なお、熱媒の一部を図示しないバイパス流路へ流すことで熱交換器３４をバイパスし、熱交換器３４によって温度制御された熱媒と混合することで温度制御を行ってもよい。 The heat storage type temperature control unit 30 detects the temperature of the heat medium from the heat exchanger 34 and / or the temperature of the heat medium entering the heat exchanger 34 using a temperature sensor (not shown), and detects the detected heat. The temperature of the heat medium can be controlled to the target temperature by controlling the pumping amount by the pump of the ice heat storage tank 33 according to the temperature of the medium. Since the chilled water radiated in the heat exchanger 34 is returned to the ice heat storage tank 33 to increase the temperature, for example, in a time zone where the load is small (morning, etc.), the pumping amount is small, and the time zone where the load peaks (2 When the amount of pumping is maximized and the heat storage (ice) is used up (such as in the evening), the pumping up from the ice storage tank 33 is stopped and the heat storage operation is started. Note that the heat control may be performed by bypassing the heat exchanger 34 by flowing a part of the heat medium through a bypass passage (not shown) and mixing with the heat medium whose temperature is controlled by the heat exchanger 34.

＜熱媒供給システムの改修＞
次に、改修手順について説明する。図３は、図１の関係部位を模式的に示したものであり、本実施形態における改修前のシステムの概略を示す図である。図３、図５および図６には、図１の既設熱媒供給システム１ｂの構成のうち、改修において直接の変更や作業の対象とならない構成を省略したシステムの概略を示す。なお、図１および図２に示すとおり、本実施形態に係る施設では、負荷側の配管系等を５系統有するが、図３、図５および図６においては、図面の記載の簡略のため、３系統のみ示す。 <Renovation of heat medium supply system>
Next, the repair procedure will be described. FIG. 3 schematically shows the relevant parts in FIG. 1 and is a diagram showing an outline of the system before the repair in the present embodiment. 3, 5, and 6 show an outline of a system in which the configuration that does not become a direct change or work target in the repair is omitted from the configuration of the existing heat medium supply system 1 b in FIG. 1. As shown in FIG. 1 and FIG. 2, the facility according to this embodiment has five systems such as a piping system on the load side, but in FIG. 3, FIG. 5, and FIG. Only three lines are shown.

改修前の既設熱媒供給システム１ｂは、温度制御部１０、２０、３０ｂで温度制御された熱媒を全て水蓄熱槽４０に蓄え、水蓄熱槽４０からの熱媒を負荷側へ送り冷熱消費後の還水を水蓄熱槽４０の高温側に戻す。本実施形態では、この既設水蓄熱槽４０を氷蓄熱槽３３へ改修して、一台の冷凍機３２ｂ（改修前の既設熱媒供給システム１ｂを示す図１を参照）を蓄熱用の冷凍機３２（改修後の熱媒供給システム１を示す図２を参照）とし、フリークーリング用と直進用の温度制御部１０、２０は温度制御された熱媒を負荷側に直接送る方式の熱媒供給システム１へ改修する。 The existing heat medium supply system 1b before renovation stores all the heat medium whose temperature is controlled by the temperature control units 10, 20, and 30b in the water heat storage tank 40, and sends the heat medium from the water heat storage tank 40 to the load side to consume cold heat. The subsequent return water is returned to the high temperature side of the water heat storage tank 40. In the present embodiment, the existing water heat storage tank 40 is repaired to the ice heat storage tank 33, and one refrigerator 32b (see FIG. 1 showing the existing heat medium supply system 1b before the repair) is used as a heat storage refrigerator. 32 (refer to FIG. 2 showing the heat medium supply system 1 after refurbishment), and the temperature control units 10 and 20 for free cooling and straight travel use a heat medium supply system in which the temperature control heat medium is directly sent to the load side. Upgrade to system 1.

図４は、本実施形態における、既設熱媒供給システム１ｂを改修する流れを示すフロー
チャートである。なお、以下に示す処理の順序は一例であり、本発明の効果を奏することが可能な範囲で、処理順序を一部前後させてもよい。 FIG. 4 is a flowchart showing a flow of refurbishing the existing heat medium supply system 1b in the present embodiment. Note that the order of processing shown below is an example, and the processing order may be partially changed within a range where the effects of the present invention can be achieved.

ステップＳ１０１では、負荷側の循環管路のうち水蓄熱槽４０に近い側の位置に供給配管６０用の第二ヘッダ装置６１および第三ヘッダ装置６２、還流配管５０用の第一ヘッダ装置５１が設置される。図５は、本実施形態における、既設熱媒供給システム１ｂにヘッダ装置５１、６１、６２を設置した状態の概略構成を示す図である。 In step S101, the second header device 61 and the third header device 62 for the supply pipe 60 and the first header device 51 for the reflux pipe 50 are located at a position near the water heat storage tank 40 in the load-side circulation pipe. Installed. FIG. 5 is a diagram illustrating a schematic configuration in a state in which the header devices 51, 61, and 62 are installed in the existing heat medium supply system 1b in the present embodiment.

ステップＳ１０２では、負荷側への熱媒の供給が停止される。具体的には、次のステップＳ１０３で還流配管５０および供給配管６０（以下、「主管５０、６０」と称する）へ枝管５０ｂ、６０ｂを接続するために、既設ポンプが停止され、水蓄熱槽４０の出入口近傍の開閉弁４１、４２が閉弁されることで、熱媒の供給が停止される。なお、枝管５０ｂ、６０ｂを接続するために熱媒の供給を停止する方法としては、凍結工法等、公知のその他の手段を採用することとしてもよい。 In step S102, the supply of the heat medium to the load side is stopped. Specifically, in the next step S103, in order to connect the branch pipes 50b and 60b to the reflux pipe 50 and the supply pipe 60 (hereinafter referred to as “main pipes 50 and 60”), the existing pump is stopped and the water heat storage tank The supply of the heat medium is stopped by closing the on-off valves 41 and 42 in the vicinity of the entrance / exit 40. In addition, as a method of stopping the supply of the heating medium in order to connect the branch pipes 50b and 60b, other known means such as a freezing method may be employed.

ステップＳ１０３では、弁付き枝管５０ｂ、６０ｂを介してヘッダ装置５１、６１、６２が接続される。具体的には、主管５０、６０、切替式温度制御部１０、冷凍機式温度制御部２０、および蓄熱式温度制御部３０に対して、閉状態の弁付き枝管５０ｂ、６０ｂが取り付けられることで、ヘッダ装置が接続される。 In step S103, the header devices 51, 61, 62 are connected via the branch pipes 50b, 60b with valves. Specifically, closed branch pipes 50b and 60b with valves are attached to the main pipes 50 and 60, the switchable temperature control unit 10, the refrigerator temperature control unit 20, and the heat storage type temperature control unit 30. Thus, the header device is connected.

更に、ヘッダ装置周りの新設管路にポンプ６３が取り付けられる。ポンプ６３は、図示の例では供給配管６０側のヘッダ装置６１、６２の間に設けられる。なお、流量制御のためにヘッダ装置６１、６２の間にポンプを複数台設け、それらポンプを台数制御および流量制御することとしてもよい。還流配管５０側ヘッダ装置５１と冷凍機の間にも冷凍機１台ごとにポンプ５３が１台設けられ、冷凍機が運転できる流量が確保される。図６は、本実施形態における、熱媒供給システム１に弁付き枝管５０ｂ、６０ｂを介してヘッダ装置が接続された状態の概略構成を示す図である。 Further, a pump 63 is attached to a new pipeline around the header device. In the illustrated example, the pump 63 is provided between the header devices 61 and 62 on the supply pipe 60 side. Note that a plurality of pumps may be provided between the header devices 61 and 62 for flow rate control, and these pumps may be controlled in number and flow rate. One pump 53 is also provided for each refrigerator between the reflux pipe 50 side header device 51 and the refrigerator, and a flow rate at which the refrigerator can be operated is ensured. FIG. 6 is a diagram illustrating a schematic configuration in a state in which the header device is connected to the heat medium supply system 1 via the valve-equipped branch pipes 50b and 60b in the present embodiment.

ステップＳ１０４では、枝管５０ｂ、６０ｂの弁が開放される。枝管５０ｂ、６０ｂの接続が完了した後、枝管５０ｂ、６０ｂの弁が開放されることで負荷側とヘッダ装置との間の流路が開通し、冷凍機からの熱媒が負荷側に循環する。同様に１系統ずつ熱媒を循環させる。 In step S104, the valves of the branch pipes 50b and 60b are opened. After the connection of the branch pipes 50b, 60b is completed, the flow path between the load side and the header device is opened by opening the valves of the branch pipes 50b, 60b, so that the heat medium from the refrigerator moves to the load side. Circulate. Similarly, the heating medium is circulated one by one.

なお、上記改修の流れにおいて、負荷側への熱媒の供給の停止、および枝管５０ｂ、６０ｂの接続は既設主管５０、６０の系統ごとに行われる。はじめに、Ｂ棟向け系統の既設ポンプが停止され、Ｂ棟向け系統の主管５０、６０とヘッダ装置の間に枝管５０ｂ、６０ｂが接続される。ここで、Ｂ棟の空調機は停止される。 In the repair flow, the supply of the heat medium to the load side and the connection of the branch pipes 50b and 60b are performed for each system of the existing main pipes 50 and 60. First, the existing pump of the system for the B building is stopped, and the branch pipes 50b and 60b are connected between the main pipes 50 and 60 of the system for the B building and the header device. Here, the air conditioner in Building B is stopped.

次に、Ａ棟向け系統の既設ポンプが停止され、主管５０、６０とヘッダ装置の間に枝管５０ｂ、６０ｂと弁が接続される。但し、Ａ棟は通信機器等が稼動している関係で空調を停止することが出来ないため、他の２系統の管から分岐をとってＡ棟向け系統の配管に接続し、その熱源側の流路を弁等で閉止したうえで他系統の熱媒を導いてもよい。このとき、他系統では水蓄熱槽４０から負荷側に向け熱媒をポンプでくみ上げる運転を行う。なお、残業者等が多い等の理由で、Ｂ棟でも空調を停止したくない場合には、Ｂ棟向け系統の接続作業においても、他の２系統の管から分岐をとってＢ棟向け系統の配管に枝管５０ｂ、６０ｂを接続し、その熱源側の流路を弁等で閉止したうえで他系統の熱媒を導いてもよい。 Next, the existing pump for the system for building A is stopped, and the branch pipes 50b and 60b and the valve are connected between the main pipes 50 and 60 and the header device. However, because the air conditioning cannot be stopped in the building A because the communication equipment is operating, branch from the other two pipes and connect to the piping of the building for the building A. You may guide the heat medium of other systems, after closing a flow path with a valve etc. At this time, in another system, an operation of pumping the heat medium from the water heat storage tank 40 toward the load side is performed. In addition, if you do not want to stop air conditioning in Building B because there are many remaining workers, etc., even in the connection work for the system for Building B, take a branch from the other two systems and use the system for Building B The branch pipes 50b and 60b may be connected to this pipe, the flow path on the heat source side may be closed with a valve or the like, and the heat medium of another system may be guided.

また、本実施形態では水蓄熱槽４０を水蓄熱から製氷コイルによる氷蓄熱槽３３への改修を想定しているため、施工性および作業性の観点から水蓄熱槽４０に出入りする管とポ
ンプは撤去される（図６を参照）。但し、作業や設置のスペースが許せば蓄熱槽への弁を閉じた状態でそのまま管とポンプ（図６の破線部分）を残すこととしてもよい。このようにすることで、管路にはヘッダ装置側と蓄熱槽側にそれぞれ弁およびポンプが取り付けられているため、試運転の際に枝管接続不良等の障害が見つかった場合や運転後に管腐食等の障害が起きた場合に、密閉系から開放系に管路を戻すことができる。 Moreover, in this embodiment, since the water heat storage tank 40 is assumed to be modified from the water heat storage to the ice heat storage tank 33 by the ice making coil, the pipes and pumps entering and exiting the water heat storage tank 40 from the viewpoint of workability and workability are It is removed (see FIG. 6). However, if space for work and installation permits, the pipe and pump (the broken line portion in FIG. 6) may be left as they are with the valve to the heat storage tank closed. In this way, the pipes are fitted with valves and pumps on the header device side and the heat storage tank side, respectively. When a failure such as this occurs, the pipeline can be returned from the closed system to the open system.

なお、改修に伴って冷凍機が更新される場合、ヘッダ装置と主管５０、６０を接続した後に冷凍機が取り替えられ、その後冷凍機とヘッダ装置とが配管接続（およびポンプ５３取付）される。そして、それらの作業が完了した後に開放系の配管が遮断され、密閉系を開通させる熱媒循環を系統ごとに行うことが出来る。この際、最初に更新された１系統の冷凍機の能力では全系統の負荷を賄うことが出来ないため、既設冷凍機の部分運転（流量を制御）、または蓄熱放熱の一方またはこれらを併用した運転が行われる。 In addition, when a refrigerator is updated with a repair, after connecting a header apparatus and the main pipes 50 and 60, a refrigerator is replaced | exchanged, and piping connection (and pump 53 attachment) is carried out after that. And after those work is completed, open system piping is interrupted | blocked and the heat medium circulation which opens a closed system can be performed for every system | strain. At this time, since the capacity of the single refrigerating machine that was first updated cannot cover the load of the whole refrigerating machine, either the partial operation of the existing refrigerating machine (controlling the flow rate), or one of these combined heat storage and heat dissipation Driving is performed.

最後に、熱交換器３４と蓄熱用冷凍機３２が設置される（図２を参照）。但し、これらの設置はヘッダ装置が設置される前でもかまわない。熱交換器３４とヘッダ装置５１、６１とを、枝管５０ｂ、６０ｂを用いて接続し、ポンプ５３を設置する手順は前述のとおりである。ここでは更に熱交換器３４と冷凍機３２との間の配管接続とポンプ設置とが行われる。最後に製氷用コイルが氷蓄熱槽３３内に設置され、蓄熱用冷凍機３２の出入り口管に前記コイル出入口管が配管接続される。 Finally, the heat exchanger 34 and the heat storage refrigerator 32 are installed (see FIG. 2). However, these installations may be performed even before the header device is installed. The procedure for connecting the heat exchanger 34 and the header devices 51 and 61 using the branch pipes 50b and 60b and installing the pump 53 is as described above. Here, pipe connection and pump installation between the heat exchanger 34 and the refrigerator 32 are further performed. Finally, an ice making coil is installed in the ice heat storage tank 33, and the coil inlet / outlet pipe is connected to the inlet / outlet pipe of the heat storage refrigerator 32.

本実施形態に拠れば、既設熱媒供給システム１ｂがある建物等の設備を、既設の管路を極力活かしたまま、より省エネルギーな熱媒供給システム１へ改修することが可能である。また、枝管５０ｂ、６０ｂが接続されようとしている系統が、通信機器を多数収納した通信施設、電算センター、クリーンルーム等の生産施設等、２４時間運転を必要とする系統である場合に、この系統への熱媒の供給を停止させずに改修を行うことが可能である。 According to the present embodiment, it is possible to refurbish a facility such as a building having the existing heat medium supply system 1b into a more energy-saving heat medium supply system 1 while utilizing the existing pipe line as much as possible. In addition, when the system to which the branch pipes 50b and 60b are to be connected is a system that requires 24-hour operation, such as a communication facility that houses a large number of communication devices, a production facility such as a computer center or a clean room, this system It is possible to carry out refurbishment without stopping the supply of the heating medium.

１ｂ既設熱媒供給システム
１熱媒供給システム
１０切替式温度制御部
２０冷凍機式温度制御部
３０蓄熱式温度制御部
３３氷蓄熱槽
４０水蓄熱槽
５０還流配管（主管）
５０ｂ枝管
５１第一ヘッダ装置
６０供給配管（主管）
６０ｂ枝管
６１第二ヘッダ装置
６２第三ヘッダ装置
９０制御装置 DESCRIPTION OF SYMBOLS 1b Existing heat carrier supply system 1 Heat carrier supply system 10 Switching type temperature control part 20 Refrigerating machine type temperature control part 30 Thermal storage type temperature control part 33 Ice thermal storage tank 40 Water thermal storage tank 50 Reflux piping (main pipe)
50b Branch pipe 51 First header device 60 Supply pipe (main pipe)
60b Branch pipe 61 Second header device 62 Third header device 90 Control device

Claims

An existing heat medium supply system having a heat storage tank that stores a heat medium recirculated from the heat load and a heat medium supplied to the heat load is distributed by the distribution unit that distributes the heat medium recirculated from the heat load and the distribution unit. A plurality of temperature control units that control the temperature of the heated heat medium using different temperature control methods, a merging unit that merges the heat mediums temperature-controlled by the plurality of temperature control units, and a merging unit A replenishment method for refurbishing to a heat medium supply system comprising a supply unit for supplying the heat medium to the heat load,
Stopping the flow of the heat medium from the recirculation part for recirculating the heat medium from the heat load to the heat storage tank, and the flow of the heat medium from the heat storage tank to the supply part;
The distribution unit is connected between the reflux unit and the temperature control unit using a valve-equipped branch pipe in a closed state, and the valve-equipped branch pipe in a closed state is connected between the supply unit and the temperature control unit. Connecting the junction using
After connecting the distribution unit and the junction unit, by opening a valve of the branch pipe connecting the distribution unit and the junction unit, the flow of the heat medium from the reflux unit to the temperature control unit, and the temperature control Starting a flow of a heat medium from a section to the supply section;
A heating medium supply system repair method comprising:

The existing heat medium supply system has a plurality of existing temperature controllers that control the temperature of the heat medium stored in the heat storage tank,
Any one of the plurality of existing temperature control units is provided with a heat exchanger that controls the temperature of the heat medium using cold water from the heat storage tank, so that the heat storage type for the heat medium supply system after the repair is provided. A step to be a temperature control unit;
Connecting a pipe so that cold water can be supplied from the heat storage tank to the heat exchanger;
The heating medium supply system according to claim 1, further comprising:

The plurality of temperature control units includes the heat storage type temperature control unit and another temperature control unit that is not a heat storage type,
The heating medium supply system after refurbishment is capable of switching the temperature control source of the heating medium between the heat storage temperature control unit and the other temperature control unit.
A method for refurbishing a heat medium supply system according to claim 2.

At least one of the distribution unit and the merging unit is a header device installed near a reflux pipe of the heat medium or a supply pipe of the heat medium,
In the step of connecting the merge portion, the reflux pipe or the supply pipe and the header device are connected using the branch pipe.
The method for repairing a heating medium supply system according to any one of claims 1 to 3.

The reflux unit and the supply unit have a plurality of systems,
Before the step of stopping the flow, among the plurality of systems, another system to which the closed valved branch pipe is not connected is branched and connected to the thermal load, and the system is connected via the other system. Further comprising the step of directing the heat medium to the heat load,
The heating medium supply system repair method according to any one of claims 1 to 4.