JP7172366B2 - Water heating system - Google Patents

Water heating system Download PDF

Info

Publication number
JP7172366B2
JP7172366B2 JP2018180977A JP2018180977A JP7172366B2 JP 7172366 B2 JP7172366 B2 JP 7172366B2 JP 2018180977 A JP2018180977 A JP 2018180977A JP 2018180977 A JP2018180977 A JP 2018180977A JP 7172366 B2 JP7172366 B2 JP 7172366B2
Authority
JP
Japan
Prior art keywords
water
water supply
heat source
line
flow rate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2018180977A
Other languages
Japanese (ja)
Other versions
JP2020051678A (en
Inventor
和之 大谷
悟 大下
智也 大沢
貴仁 北村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miura Co Ltd
Original Assignee
Miura Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miura Co Ltd filed Critical Miura Co Ltd
Priority to JP2018180977A priority Critical patent/JP7172366B2/en
Publication of JP2020051678A publication Critical patent/JP2020051678A/en
Application granted granted Critical
Publication of JP7172366B2 publication Critical patent/JP7172366B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Description

本発明は、給水加温システムに関する。 The present invention relates to a feedwater heating system.

工場等から排出される廃温水を熱源水として給水を加温し、加温された給水をボイラの給水タンクに供給する技術が提案されている。加温された給水が給水タンクからボイラに供給されることにより、ボイラで蒸気を生成するために必要な燃料が削減される。特許文献１には、ヒートポンプにより熱源水から熱を汲み上げて給水を加温する給水加温システムが開示されている。 A technique has been proposed in which waste hot water discharged from a factory or the like is used as heat source water to heat feed water, and the heated feed water is supplied to the feed water tank of a boiler. By supplying heated feedwater from the feedwater tank to the boiler, the fuel required to generate steam in the boiler is reduced. Patent Literature 1 discloses a feed water heating system that heats feed water by pumping heat from heat source water with a heat pump.

特開２０１３－２１０１１８号公報Japanese Unexamined Patent Application Publication No. 2013-210118

ヒートポンプは、高温部と低温部の温度差が小さいほど成績係数（ＣＯＰ）が良くなるので、低温部側となる給水の温度（１０～３０℃の常温）に、高温部側となる熱源水の温度が近いほど熱回収効率が高い。その一方で、ヒートポンプは、熱源水の温度が高くなり過ぎると熱回収効率が低下する。工場等から排出される廃温水の温度は、業種によって様々であり、操業中の廃温水の温度変化にも種々のパターンが存在する。そこで、熱源水の温度が高い場合には、シンプルに熱交換器のみを用いて熱回収を行う方が有利なため、熱交換器のみのシステムにおいても、熱源水から効率良く熱回収できる技術が要望される。 The coefficient of performance (COP) of the heat pump improves as the temperature difference between the high temperature part and the low temperature part decreases. The closer the temperatures, the higher the heat recovery efficiency. On the other hand, when the temperature of the heat source water becomes too high, the heat pump deteriorates in heat recovery efficiency. The temperature of waste hot water discharged from a factory or the like varies depending on the type of industry, and there are various patterns of temperature change of waste hot water during operation. Therefore, when the temperature of the heat source water is high, it is advantageous to simply recover heat using only a heat exchanger. requested.

本発明の態様は、熱源水から効率良く熱回収できる給水加温システムを提供することを目的とする。 An object of the present invention is to provide a feed water heating system capable of efficiently recovering heat from heat source water.

本発明の態様に従えば、給水を貯留する給水タンクと、熱源水を貯留する熱源水タンクと、給水を前記給水タンクに送給する第１給水ラインと、熱源水を前記熱源水タンクから送出する熱源水ラインと、前記熱源水ラインを流通する熱源水との熱交換により、前記第１給水ラインを流通する給水を加熱する熱交換器と、前記給水タンクの水位を検出する水位検出手段と、前記第１給水ラインに設けられ、前記給水タンクへの給水状態を切り換える給水状態切換手段と、前記水位検出手段の検出水位値に基づいて、前記給水状態切換手段を制御する制御手段と、を備える給水加温システムであって、次の〔１〕～〔３〕のいずれかの付加構成を有する給水加温システムが提供される。
〔１〕給水状態切換手段は、給水タンクへの給水流量を調節可能な給水流量調節手段として構成されており、制御手段は、水位検出手段の検出水位値が第１設定水位値以下の場合、給水流量が所要流量になるように給水流量調節手段を制御し、検出水位値が第１設定水位値よりも高い第２設定水位値以上の場合、給水流量がゼロになるように給水流量調節手段を制御し、検出水位値が第１設定水位値超過且つ第２設定水位値未満の範囲にある場合、検出水位値の上昇に伴って給水流量が所要流量からゼロに向かって段階的に減少されるように給水流量調節手段を制御する、給水加温システム。
〔２〕前記第１給水ラインの上流端に接続された補給水タンクと、を備え、前記給水状態切換手段は、前記熱交換器の下流側の前記第１給水ラインから分岐し、前記熱交換器を通過後の給水を前記補給水タンクに還流させる還流ラインと、給水の前記給水タンクへの送給と、前記補給水タンクへの還流とを切り換える第１流路切換手段と、を有して構成され、前記制御手段は、前記水位検出手段の検出水位値が第５設定水位値未満の場合、前記熱交換器を通過後の給水を前記給水タンクに送給するように前記第１流路切換手段を切り換え、前記検出水位値が第５設定水位値以上の場合、前記熱交換器を通過後の給水を前記補給水タンクに還流させるように前記第１流路切換手段を切り換える、給水加温システム。
〔３〕前記熱源水ラインを流通する熱源水の流量を調節する熱源水流量調節手段と、前記熱交換器に流入する熱源水の入口温度を検出する熱源水入口温度検出手段と、前記熱交換器から流出する給水の出口温度を検出する給水出口温度検出手段と、を備え、前記制御手段は、前記熱交換器に給水を通水中、前記熱源水入口温度検出手段の検出温度値と前記給水出口温度検出手段の検出温度値との第２差分値が予め設定された目標温度値となるように前記熱源水流量調節手段を制御する、給水加温システム。 According to the aspect of the present invention, a water supply tank that stores water supply, a heat source water tank that stores heat source water, a first water supply line that supplies water supply to the water supply tank, and heat source water that is delivered from the heat source water tank. a heat exchanger for heating the feed water flowing through the first feed water line by heat exchange between the heat source water line and the heat source water flowing through the heat source water line; and a water level detection means for detecting the water level of the feed water tank. water supply state switching means provided in the first water supply line for switching the water supply state to the water supply tank; and control means for controlling the water supply state switching means based on the water level value detected by the water level detection means. Provided is a feed water heating system having any one of the following additional configurations [1] to [3] .
[1] The water supply state switching means is configured as a water supply flow rate adjustment means capable of adjusting the water supply flow rate to the water supply tank, and the control means, when the water level value detected by the water level detection means is equal to or lower than the first set water level value, The water supply flow rate adjusting means is controlled so that the water supply flow rate becomes the required flow rate, and when the detected water level value is equal to or higher than the second set water level value higher than the first set water level value, the water supply flow rate adjustment means makes the water supply flow rate zero. is controlled, and when the detected water level value is in the range of exceeding the first set water level value and less than the second set water level value, the water supply flow rate is gradually reduced from the required flow rate to zero as the detected water level value rises. a feedwater heating system that controls the feedwater flow rate control means to
[2] A make-up water tank connected to the upstream end of the first water supply line, the water supply state switching means branching from the first water supply line on the downstream side of the heat exchanger, and performing the heat exchange a reflux line for returning feed water that has passed through the vessel to the make-up water tank; When the water level value detected by the water level detection means is less than a fifth set water level value, the control means controls the first flow so as to supply the water supply after passing through the heat exchanger to the water supply tank. switching the path switching means, and when the detected water level value is equal to or higher than a fifth set water level value, switching the first path switching means so that the water supply after passing through the heat exchanger is returned to the make-up water tank; heating system.
[3] Heat source water flow rate adjusting means for adjusting the flow rate of the heat source water flowing through the heat source water line, heat source water inlet temperature detecting means for detecting the inlet temperature of the heat source water flowing into the heat exchanger, and the heat exchange and a feed water outlet temperature detecting means for detecting the outlet temperature of the feed water flowing out of the heat exchanger, wherein the control means detects the temperature value detected by the heat source water inlet temperature detecting means and the feed water while the feed water is flowing through the heat exchanger. A feed water heating system that controls the heat source water flow rate adjusting means so that a second difference value from a temperature value detected by an outlet temperature detecting means becomes a preset target temperature value.

本発明の態様によれば、熱源水から熱を効率良く回収できる給水加温システムが提供される。 An aspect of the present invention provides a feed water heating system capable of efficiently recovering heat from heat source water.

図１は、実施形態に係る給水加温システムを示す模式図である。FIG. 1 is a schematic diagram showing a water supply heating system according to an embodiment. 図２は、実施形態に係る給水加温システムを示す機能ブロック図である。FIG. 2 is a functional block diagram showing the water supply heating system according to the embodiment. 図３は、実施形態に係る給水制御部の処理を説明するための図である。FIG. 3 is a diagram for explaining processing of the water supply control unit according to the embodiment; 図４は、実施形態に係る給水加温システムを示す機能ブロック図である。FIG. 4 is a functional block diagram showing the water supply heating system according to the embodiment. 図５は、実施形態に係る給水加温システムを示す模式図である。FIG. 5 is a schematic diagram showing the water supply heating system according to the embodiment. 図６は、実施形態に係る給水加温システムを示す模式図である。FIG. 6 is a schematic diagram showing the water supply heating system according to the embodiment. 図７は、実施形態に係るコンピュータシステムを示すブロック図である。FIG. 7 is a block diagram showing a computer system according to the embodiment.

以下、本発明に係る実施形態について図面を参照しながら説明するが、本発明はこれに限定されない。以下で説明する実施形態の構成要素は、適宜組み合わせることができる。また、一部の構成要素を用いない場合もある。 Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited thereto. The constituent elements of the embodiments described below can be combined as appropriate. Also, some components may not be used.

［第１実施形態］
＜給水加温システム＞
図１は、本実施形態に係る給水加温システム１を示す模式図である。給水加温システム１は、工場のような産業施設に設けられる。給水加温システム１は、熱源水ＳＷの熱を用いて給水ＣＷを加温し、加温された給水ＣＷをボイラ８０の給水タンク２に供給する。熱源水ＳＷは、産業施設から排出される廃温水を含む。 [First embodiment]
<Water heating system>
FIG. 1 is a schematic diagram showing a water supply heating system 1 according to this embodiment. A water supply heating system 1 is installed in an industrial facility such as a factory. The feed water heating system 1 heats the feed water CW using the heat of the heat source water SW and supplies the heated feed water CW to the feed water tank 2 of the boiler 80 . The heat source water SW includes waste hot water discharged from industrial facilities.

給水加温システム１は、給水ＣＷを貯留する給水タンク２と、熱源水ＳＷを貯留する熱源水タンク３と、給水ＣＷを貯留する補給水タンク４と、給水ＣＷを給水タンク２に送給する第１給水ライン１１と、給水ＣＷを給水タンク２に送給する第２給水ライン１２と、熱源水ＳＷを熱源水タンク３から送出する熱源水ライン１３と、給水ＣＷを補給水タンク４に送給する原水ライン１４と、熱源水ライン１３を流通する熱源水ＳＷとの熱交換により、第１給水ライン１１を流通する給水ＣＷを加温する熱交換器１０と、を備える。 The feed water heating system 1 includes a feed water tank 2 that stores feed water CW, a heat source water tank 3 that stores heat source water SW, a make-up water tank 4 that stores feed water CW, and feeds the feed water CW to the feed water tank 2. A first water supply line 11, a second water supply line 12 for supplying the water supply CW to the water supply tank 2, a heat source water line 13 for supplying the heat source water SW from the heat source water tank 3, and a supply water CW for supplying the supply water tank 4. The heat exchanger 10 heats the feed water CW flowing through the first water supply line 11 by heat exchange between the raw water line 14 to be supplied and the heat source water SW flowing through the heat source water line 13 .

また、給水加温システム１は、給水タンク２の水位を検出する水位センサ５と、熱交換器１０に流入する給水ＣＷの入口温度を検出する給水入口温度センサ６Ａと、熱交換器１０から流出する給水ＣＷの出口温度を検出する給水出口温度センサ６Ｂと、熱交換器１０に流入する熱源水ＳＷの入口温度を検出する熱源水入口温度センサ７Ａと、熱交換器１０から流出する熱源水ＳＷの出口温度を検出する熱源水出口温度センサ７Ｂと、第１給水ライン１１を流通する給水ＣＷの流量を検出する給水流量センサ８と、熱源水ライン１３を流通する熱源水ＳＷの流量を検出する熱源水流量センサ９と、を備える。 The feed water heating system 1 also includes a water level sensor 5 that detects the water level of the feed water tank 2, a feed water inlet temperature sensor 6A that detects the inlet temperature of the feed water CW flowing into the heat exchanger 10, and a feed water outlet temperature sensor 6B that detects the outlet temperature of the feed water CW that flows into the heat exchanger 10; a heat source water inlet temperature sensor 7A that detects the inlet temperature of the heat source water SW flowing into the heat exchanger 10; a heat source water outlet temperature sensor 7B that detects the outlet temperature of the water supply line 11, a water supply flow sensor 8 that detects the flow rate of the water supply CW flowing through the first water supply line 11, and a heat source water SW flowing through the heat source water line 13 A heat source water flow sensor 9 is provided.

また、給水加温システム１は、第１給水ライン１１に設けられ、給水タンク２への給水状態を切り換える給水状態切換手段２０と、熱源水ライン１３に設けられ、熱源水ライン１３を流通する熱源水ＳＷの流量を調節する熱源水流量調節手段３０と、制御装置５０と、を備える。 The water supply heating system 1 also includes a water supply state switching means 20 provided in the first water supply line 11 for switching the state of water supply to the water supply tank 2, A heat source water flow rate adjusting means 30 for adjusting the flow rate of water SW and a control device 50 are provided.

本実施形態において、給水状態切換手段２０は、給水タンク２への給水流量を調節可能な給水流量調節手段２０Ａとして構成されている。給水流量調節手段２０Ａは、熱交換器１０の上流側の第１給水ライン１１に設けられた給水ポンプ２１と、第１給水ライン１１において給水ポンプ２１の吐出側に設けられた第１給水弁２２とを含む。 In this embodiment, the water supply state switching means 20 is configured as a water supply flow rate adjustment means 20A capable of adjusting the water supply flow rate to the water supply tank 2 . The water supply flow rate adjusting means 20A includes a water supply pump 21 provided in the first water supply line 11 on the upstream side of the heat exchanger 10, and a first water supply valve 22 provided in the first water supply line 11 on the discharge side of the water supply pump 21. including.

熱源水流量調節手段３０は、熱交換器１０の上流側の熱源水ライン１３に設けられた熱源水ポンプ３１を含む。 The heat source water flow rate adjusting means 30 includes a heat source water pump 31 provided in the heat source water line 13 on the upstream side of the heat exchanger 10 .

また、給水加温システム１は、第２給水ライン１２に設けられた第２給水弁４１を備える。 The water supply heating system 1 also includes a second water supply valve 41 provided in the second water supply line 12 .

（ボイラ）
ボイラ８０は、蒸気ボイラである。ボイラ８０は、給水タンク２から供給された給水ＣＷを加熱して蒸気を生成する。給水タンク２とボイラ８０とは、温水ライン８１を介して接続される。温水ライン８１に温水ポンプ８２が設けられる。温水ポンプ８２が駆動されることにより、給水タンク２に貯留されている給水ＣＷがボイラ８０に供給される。ボイラ８０で生成された蒸気は、蒸気使用機器（不図示）に供給される。加温された給水ＣＷが給水タンク２からボイラ８０に供給されることにより、ボイラ８０で蒸気を生成するために必要な燃料が削減される。 (boiler)
Boiler 80 is a steam boiler. The boiler 80 heats the feed water CW supplied from the feed water tank 2 to generate steam. The water supply tank 2 and the boiler 80 are connected via a hot water line 81 . A hot water pump 82 is provided in the hot water line 81 . By driving the hot water pump 82 , the water CW stored in the water supply tank 2 is supplied to the boiler 80 . The steam generated by the boiler 80 is supplied to steam using equipment (not shown). By supplying the heated feed water CW from the feed water tank 2 to the boiler 80, the fuel required for generating steam in the boiler 80 is reduced.

（タンク）
給水タンク２は、ボイラ８０に供給される給水ＣＷを貯留する。給水タンク２は、補給水タンク４から送出され、第１給水ライン１１及び第２給水ライン１２の少なくとも一方を通過した給水ＣＷを貯留する。 (tank)
The feed water tank 2 stores the feed water CW supplied to the boiler 80 . The water supply tank 2 stores the water supply CW sent from the makeup water tank 4 and having passed through at least one of the first water supply line 11 and the second water supply line 12 .

熱源水タンク３は、熱交換器１０に供給される熱源水ＳＷを貯留する。熱源水タンク３は、産業施設から送出され、供給ライン１５を介して供給された熱源水ＳＷを貯留する。熱源水タンク３は、熱源水ＳＷをオーバーフローさせるオーバーフロー路１６を有する。 The heat source water tank 3 stores heat source water SW to be supplied to the heat exchanger 10 . The heat source water tank 3 stores the heat source water SW sent from the industrial facility and supplied through the supply line 15 . The heat source water tank 3 has an overflow path 16 for overflowing the heat source water SW.

補給水タンク４は、給水タンク２に供給される給水ＣＷを貯留する。補給水タンク４は、給水供給源から送出され、原水ライン１４を介して供給された給水ＣＷを貯留する。補給水タンク４に貯留される給水ＣＷは、加温前の給水ＣＷである。補給水タンク４に貯留される給水ＣＷの温度は、例えば２０℃である。 The makeup water tank 4 stores the water supply CW supplied to the water supply tank 2 . The make-up water tank 4 stores the water supply CW sent from the water supply source and supplied through the raw water line 14 . The feed water CW stored in the make-up water tank 4 is the feed water CW before heating. The temperature of the feed water CW stored in the make-up water tank 4 is, for example, 20°C.

原水ライン１４に水処理装置４２が設けられる。水処理装置４２は、原水ライン１４を介して補給水タンク４に供給される給水ＣＷを処理する。水処理装置４２は、例えば給水ＣＷの溶存酸素を除去する脱酸素装置を含む。 A water treatment device 42 is provided in the raw water line 14 . The water treatment device 42 treats the feed water CW supplied to the make-up water tank 4 via the raw water line 14 . The water treatment device 42 includes, for example, a deoxygenator that removes dissolved oxygen from the feed water CW.

（給水ライン）
図１の矢印Ｆ１で示すように、第１給水ライン１１は、熱交換器１０を介して給水ＣＷを給水タンク２に送給する。第１給水ライン１１は、上流端１１Ａ及び下流端１１Ｂを有する。第１給水ライン１１の上流端１１Ａは、補給水タンク４に接続される。第１給水ライン１１の下流端１１Ｂは、給水タンク２に接続される。上流端１１Ａと下流端１１Ｂとの間の第１給水ライン１１の少なくとも一部は、熱交換器１０に配置される。 (water supply line)
The first water supply line 11 supplies the water supply CW to the water supply tank 2 via the heat exchanger 10, as indicated by the arrow F1 in FIG. The first water supply line 11 has an upstream end 11A and a downstream end 11B. An upstream end 11A of the first water supply line 11 is connected to the makeup water tank 4 . A downstream end 11B of the first water supply line 11 is connected to the water supply tank 2 . At least part of the first water supply line 11 between the upstream end 11A and the downstream end 11B is arranged in the heat exchanger 10 .

図１の矢印Ｆ２で示すように、第２給水ライン１２は、熱交換器１０を介さずに給水ＣＷを給水タンク２に送給する。第１給水ライン１１の少なくとも一部と第２給水ライン１２とは並列に配設される。第２給水ライン１２は、熱交換器１０の上流側の第１給水ライン１１から分岐した後、熱交換器１０の下流側の第１給水ライン１１に合流するように配設される。第２給水ライン１２は、上流端１２Ａ及び下流端１２Ｂを有する。第２給水ライン１２の上流端１２Ａは、熱交換器１０の上流側に規定された第１給水ライン１１の分岐部１１Ｃに接続される。第２給水ライン１２の下流端１２Ｂは、熱交換器１０の下流側に規定された第１給水ライン１１の合流部１１Ｄに接続される。 As indicated by arrow F2 in FIG. At least part of the first water supply line 11 and the second water supply line 12 are arranged in parallel. The second water supply line 12 is arranged so as to branch from the first water supply line 11 on the upstream side of the heat exchanger 10 and then join the first water supply line 11 on the downstream side of the heat exchanger 10 . The second water supply line 12 has an upstream end 12A and a downstream end 12B. An upstream end 12A of the second water supply line 12 is connected to a branch portion 11C of the first water supply line 11 defined on the upstream side of the heat exchanger 10 . A downstream end 12B of the second water supply line 12 is connected to a confluence portion 11D of the first water supply line 11 defined downstream of the heat exchanger 10 .

（熱源水ライン）
図１の矢印Ｆ３で示すように、熱源水ライン１３は、熱源水ＳＷを熱源水タンク３から熱交換器１０に送出する。熱源水ライン１３は、上流端１３Ａ及び下流端１３Ｂを有する。熱源水ライン１３の上流端１３Ａは、熱源水タンク３に接続される。熱源水ライン１３を流通した熱源水ＳＷは、下流端１３Ｂから排出される。上流端１３Ａと下流端１３Ｂとの間の熱源水ライン１３の少なくとも一部は、熱交換器１０に配置される。 (Heat source water line)
The heat source water line 13 delivers the heat source water SW from the heat source water tank 3 to the heat exchanger 10 as indicated by an arrow F3 in FIG. The heat source water line 13 has an upstream end 13A and a downstream end 13B. An upstream end 13A of the heat source water line 13 is connected to the heat source water tank 3 . The heat source water SW that has flowed through the heat source water line 13 is discharged from the downstream end 13B. At least part of the heat source water line 13 between the upstream end 13A and the downstream end 13B is arranged in the heat exchanger 10 .

（熱交換器）
熱交換器１０は、第１給水ライン１１を流通する給水ＣＷと熱源水ライン１３を流通する熱源水ＳＷとの熱交換により、給水ＣＷを加温する。熱交換器１０は、シェルアンドチューブ式熱交換器でもよいし、積層プレート式熱交換器でもよい。熱交換器１０で加温された給水ＣＷは、第１給水ライン１１を介して給水タンク２に供給される。 (Heat exchanger)
The heat exchanger 10 heats the feed water CW by heat exchange between the feed water CW flowing through the first feed water line 11 and the heat source water SW flowing through the heat source water line 13 . The heat exchanger 10 may be a shell-and-tube heat exchanger or a laminated plate heat exchanger. The water supply CW heated by the heat exchanger 10 is supplied to the water supply tank 2 through the first water supply line 11 .

（センサ）
水位センサ５は、給水タンク２の水位を検出する水位検出手段として機能する。給水タンク２の水位とは、給水タンク２に貯留される給水ＣＷの表面の高さをいう。水位センサ５は、給水タンク２に設けられる。水位センサ５は、電極式水位センサを含む。水位センサ５として、複数の電極棒が給水タンク２に配置されてもよい。複数の電極棒は、電極棒の下端部の高さが異なるように給水タンク２に配置される。給水ＣＷに接触した電極棒が特定されることにより、給水タンク２の水位が検出される。なお、水位センサ５は、給水タンク２の水位を検出できればよく、電極式水位センサ以外に静電容量式水位センサや圧力式センサを利用することもできる。水位センサ５は、給水タンク２の水位の検出値を示す検出水位値Ｌｓを制御装置５０に出力する。 (sensor)
The water level sensor 5 functions as water level detection means for detecting the water level of the water supply tank 2 . The water level of the water supply tank 2 means the surface height of the water supply CW stored in the water supply tank 2 . A water level sensor 5 is provided in the water supply tank 2 . The water level sensor 5 includes an electrode type water level sensor. A plurality of electrode rods may be arranged in the water supply tank 2 as the water level sensor 5 . A plurality of electrode rods are arranged in the water supply tank 2 so that the heights of the lower ends of the electrode rods are different. The water level of the water supply tank 2 is detected by identifying the electrode rods in contact with the water supply CW. The water level sensor 5 only needs to be able to detect the water level of the water supply tank 2, and a capacitive water level sensor or a pressure sensor can be used instead of the electrode type water level sensor. The water level sensor 5 outputs a detected water level value Ls indicating the detected water level of the water supply tank 2 to the control device 50 .

給水入口温度センサ６Ａは、補給水タンク４から送出され、熱交換器１０に流入する給水ＣＷの入口温度を検出する給水入口温度検出手段として機能する。給水入口温度センサ６Ａは、熱交換器１０の上流側の第１給水ライン１１を流通する給水ＣＷの温度を検出する。給水入口温度センサ６Ａは、熱交換器１０に流入する給水ＣＷの入口温度の検出値を示す検出温度値Ｔ１を制御装置５０に出力する。 The feed water inlet temperature sensor 6A functions as feed water inlet temperature detection means for detecting the inlet temperature of the feed water CW sent from the makeup water tank 4 and flowing into the heat exchanger 10 . The feed water inlet temperature sensor 6A detects the temperature of the feed water CW flowing through the first feed water line 11 on the upstream side of the heat exchanger 10 . The feed water inlet temperature sensor 6A outputs a detected temperature value T1 indicating the detected value of the inlet temperature of the feed water CW flowing into the heat exchanger 10 to the control device 50 .

給水出口温度センサ６Ｂは、熱交換器１０から流出する給水ＣＷの出口温度を検出する給水出口温度検出手段として機能する。給水出口温度センサ６Ｂは、熱交換器１０の下流側の第１給水ライン１１を流通する給水ＣＷの温度を検出する。給水出口温度センサ６Ｂは、熱交換器１０から流出する給水ＣＷの出口温度の検出値を示す検出温度値Ｔ２を制御装置５０に出力する。 The feed water outlet temperature sensor 6B functions as feed water outlet temperature detection means for detecting the outlet temperature of the feed water CW flowing out of the heat exchanger 10 . The water supply outlet temperature sensor 6B detects the temperature of the water supply CW flowing through the first water supply line 11 on the downstream side of the heat exchanger 10 . The feed water outlet temperature sensor 6B outputs to the control device 50 a detected temperature value T2 indicating the detected value of the outlet temperature of the feed water CW flowing out of the heat exchanger 10 .

熱源水入口温度センサ７Ａは、熱源水タンク３から送出され、熱交換器１０に流入する熱源水ＳＷの入口温度を検出する熱源水入口温度検出手段として機能する。熱源水入口温度センサ７Ａは、熱交換器１０の上流側の熱源水ライン１３を流通する熱源水ＳＷの温度を検出する。熱源水入口温度センサ７Ａは、熱交換器１０に流入する熱源水ＳＷの入口温度の検出値を示す検出温度値Ｔ３を制御装置５０に出力する。 The heat source water inlet temperature sensor 7A functions as heat source water inlet temperature detection means for detecting the inlet temperature of the heat source water SW sent from the heat source water tank 3 and flowing into the heat exchanger 10 . The heat source water inlet temperature sensor 7A detects the temperature of the heat source water SW flowing through the heat source water line 13 on the upstream side of the heat exchanger 10 . The heat source water inlet temperature sensor 7A outputs to the control device 50 a detected temperature value T3 indicating the detected value of the inlet temperature of the heat source water SW flowing into the heat exchanger 10 .

熱源水出口温度センサ７Ｂは、熱交換器１０から流出する熱源水ＳＷの出口温度を検出する。熱源水出口温度センサ７Ｂは、熱交換器１０の下流側の熱源水ライン１３を流通する熱源水ＳＷの温度を検出する。熱源水出口温度センサ７Ｂは、熱交換器１０から流出する熱源水ＳＷの出口温度の検出値を示す検出温度値Ｔ４を制御装置５０に出力する。 The heat source water outlet temperature sensor 7B detects the outlet temperature of the heat source water SW flowing out from the heat exchanger 10 . The heat source water outlet temperature sensor 7B detects the temperature of the heat source water SW flowing through the heat source water line 13 on the downstream side of the heat exchanger 10 . The heat source water outlet temperature sensor 7B outputs to the control device 50 a detected temperature value T4 indicating the detected value of the outlet temperature of the heat source water SW flowing out of the heat exchanger 10 .

給水流量センサ８は、熱交換器１０に流入する給水ＣＷの流量を検出する。給水流量センサ８は、熱交換器１０の上流側の第１給水ライン１１を流通する給水ＣＷの流量を検出する。給水流量センサ８は、熱交換器１０に流入する給水ＣＷの流量の検出値を示す検出流量値ＦＭ１を制御装置５０に出力する。 A feed water flow rate sensor 8 detects the flow rate of feed water CW flowing into the heat exchanger 10 . The feed water flow rate sensor 8 detects the flow rate of the feed water CW flowing through the first water feed line 11 on the upstream side of the heat exchanger 10 . The feed water flow rate sensor 8 outputs to the control device 50 a detected flow rate value FM1 indicating the detected value of the flow rate of the feed water CW flowing into the heat exchanger 10 .

熱源水流量センサ９は、熱交換器１０に流入する熱源水ＳＷの流量を検出する。熱源水流量センサ９は、熱交換器１０の上流側の熱源水ライン１３を流通する熱源水ＳＷの流量を検出する。熱源水流量センサ９は、熱交換器１０に流入する熱源水ＳＷの流量の検出値を示す検出流量値ＦＭ２を制御装置５０に出力する。 The heat source water flow rate sensor 9 detects the flow rate of the heat source water SW flowing into the heat exchanger 10 . The heat source water flow rate sensor 9 detects the flow rate of the heat source water SW flowing through the heat source water line 13 on the upstream side of the heat exchanger 10 . The heat source water flow rate sensor 9 outputs to the control device 50 a detected flow rate value FM2 indicating the detected value of the flow rate of the heat source water SW flowing into the heat exchanger 10 .

（給水流量調節手段）
給水流量調節手段２０Ａは、第１給水ライン１１に設けられ、給水タンク２への給水流量を調節可能である。給水流量調節手段２０Ａは、熱交換器１０の上流側の第１給水ライン１１に設けられ、予め設定された駆動周波数に応じた回転速度で駆動される給水ポンプ２１と、給水ポンプ２１の吐出側に設けられ、入力された開度指定信号に対応する開度で作動される第１給水弁２２と、を有する。 (Water supply flow rate adjusting means)
The water supply flow rate adjusting means 20A is provided in the first water supply line 11 and can adjust the water supply flow rate to the water supply tank 2 . The water supply flow rate adjusting means 20A is provided in the first water supply line 11 on the upstream side of the heat exchanger 10, the water supply pump 21 driven at a rotation speed corresponding to a preset driving frequency, and the water supply pump 21 on the discharge side. and a first water supply valve 22 which is provided at an opening degree corresponding to the inputted opening degree designation signal.

給水ポンプ２１は、上流端１１Ａと分岐部１１Ｃとの間の第１給水ライン１１に設けられる。給水ポンプ２１が駆動されることにより、補給水タンク４の給水ＣＷが給水ポンプ２１に吸い込まれる。給水ポンプ２１に吸い込まれた給水ＣＷは、給水ポンプ２１から吐出され、第１給水ライン１１及び第２給水ライン１２の少なくとも一方を流通した後、給水タンク２に供給される。給水ポンプ２１は、予め設定された駆動周波数に応じた回転速度で駆動される。給水ポンプ２１は、一定の回転速度で駆動して、一定の流量で給水ＣＷを吐出する。 The water supply pump 21 is provided in the first water supply line 11 between the upstream end 11A and the branch portion 11C. By driving the water supply pump 21 , the water supply CW of the makeup water tank 4 is sucked into the water supply pump 21 . The water supply CW sucked into the water supply pump 21 is discharged from the water supply pump 21 , flows through at least one of the first water supply line 11 and the second water supply line 12 , and is then supplied to the water supply tank 2 . The water supply pump 21 is driven at a rotation speed corresponding to a preset driving frequency. The water supply pump 21 is driven at a constant rotational speed and discharges the water supply CW at a constant flow rate.

第１給水弁２２は、熱交換器１０と合流部１１Ｄとの間の第１給水ライン１１に設けられる。第１給水弁２２は、例えば電動弁を含み、入力された開度指定信号に対応する開度で作動される。第１給水弁２２の開度が調節されることにより、第１給水ライン１１を介して給水タンク２に供給される給水流量が調節される。 The first water supply valve 22 is provided in the first water supply line 11 between the heat exchanger 10 and the confluence section 11D. The first water supply valve 22 includes, for example, an electric valve, and is operated at an opening corresponding to the input opening designation signal. By adjusting the degree of opening of the first water supply valve 22, the flow rate of water supplied to the water supply tank 2 through the first water supply line 11 is adjusted.

なお、第１給水弁２２は、分岐部１１Ｃと熱交換器１０との間の第１給水ライン１１に設けられてもよい。また、第１給水弁２２は、給水ポンプ２１の吸込側に設けられてもよく、上流端１１Ａと給水ポンプ２１との間の第１給水ライン１１に設けられてもよい。 Note that the first water supply valve 22 may be provided in the first water supply line 11 between the branch portion 11</b>C and the heat exchanger 10 . The first water supply valve 22 may be provided on the suction side of the water supply pump 21 or may be provided in the first water supply line 11 between the upstream end 11A and the water supply pump 21 .

（熱源水流量調節手段）
熱源水流量調節手段３０は、熱源水ライン１３に設けられ、熱源水ライン１３を流通する熱源水ＳＷの流量を調節可能である。熱源水流量調節手段３０は、熱交換器１０の上流側の熱源水ライン１３に設けられ、入力された駆動周波数に応じた回転速度で駆動される熱源水ポンプ３１と、入力された周波数指定信号に対応する駆動周波数を熱源水ポンプ３１に出力するインバータ３２（第２インバータ）と、を有する。 (Heat source water flow rate adjusting means)
The heat source water flow rate adjusting means 30 is provided in the heat source water line 13 and can adjust the flow rate of the heat source water SW flowing through the heat source water line 13 . The heat source water flow rate adjusting means 30 is provided in the heat source water line 13 on the upstream side of the heat exchanger 10, and includes a heat source water pump 31 driven at a rotational speed corresponding to the input drive frequency, and an input frequency designation signal. and an inverter 32 (second inverter) that outputs a driving frequency corresponding to the heat source water pump 31 .

熱源水ポンプ３１は、上流端１３Ａと熱交換器１０との間の熱源水ライン１３に設けられる。熱源水ポンプ３１が駆動されることにより、熱源水タンク３の熱源水ＳＷが熱源水ポンプ３１に吸い込まれる。熱源水ポンプ３１に吸い込まれた熱源水ＳＷは、熱源水ポンプ３１から吐出され、熱源水ライン１３を流通した後、下流端１３Ｂから排出される。熱源水ポンプ３１が停止されると、熱源水タンク３からの熱源水ＳＷの送出が停止する。熱源水ポンプ３１は、インバータ３２から入力された駆動周波数に応じた回転速度で駆動される。熱源水ポンプ３１の回転速度が変化することにより、熱源水ポンプ３１から吐出される熱源水ＳＷの流量が変化する。インバータ３２から熱源水ポンプ３１に入力される駆動周波数が調節されることにより、熱源水ライン１３を流通する熱源水ＳＷの流量が調節される。 The heat source water pump 31 is provided in the heat source water line 13 between the upstream end 13A and the heat exchanger 10 . By driving the heat source water pump 31 , the heat source water SW in the heat source water tank 3 is sucked into the heat source water pump 31 . The heat source water SW sucked into the heat source water pump 31 is discharged from the heat source water pump 31, flows through the heat source water line 13, and is discharged from the downstream end 13B. When the heat source water pump 31 is stopped, the delivery of the heat source water SW from the heat source water tank 3 is stopped. The heat source water pump 31 is driven at a rotational speed corresponding to the driving frequency input from the inverter 32 . As the rotation speed of the heat source water pump 31 changes, the flow rate of the heat source water SW discharged from the heat source water pump 31 changes. By adjusting the driving frequency input from the inverter 32 to the heat source water pump 31, the flow rate of the heat source water SW flowing through the heat source water line 13 is adjusted.

＜給水状態の切り換え＞ <Switching water supply status>

給水ポンプ２１は、第１給水ライン１１及び第２給水ライン１２における給水ＣＷの送給の有無を切り換え可能である。給水ポンプ２１が駆動されると、第１給水ライン１１及び第２給水ライン１２の少なくとも一方を介して給水ＣＷが給水タンク２に送給される。給水ポンプ２１が停止されると、補給水タンク４からの給水ＣＷの送給が停止する。 The water supply pump 21 can switch whether or not to supply the water supply CW in the first water supply line 11 and the second water supply line 12 . When the water supply pump 21 is driven, the water supply CW is supplied to the water supply tank 2 through at least one of the first water supply line 11 and the second water supply line 12 . When the water supply pump 21 is stopped, the supply of water CW from the makeup water tank 4 is stopped.

第１給水弁２２は、第１給水ライン１１に設けられる。第１給水弁２２は、第１給水ライン１１における給水ＣＷの送給の有無を切り換え可能である。給水ポンプ２１が駆動されている状態で、第１給水弁２２が開放されると、補給水タンク４から送出された給水ＣＷは、第１給水ライン１１を介して給水タンク２に送給される。第１給水弁２２が閉鎖されると、第１給水ライン１１における給水ＣＷの送給が停止する。 The first water supply valve 22 is provided in the first water supply line 11 . The first water supply valve 22 can switch whether or not the water supply CW is supplied in the first water supply line 11 . When the first water supply valve 22 is opened while the water supply pump 21 is being driven, the water supply CW sent from the makeup water tank 4 is supplied to the water supply tank 2 via the first water supply line 11. . When the first water supply valve 22 is closed, the supply of the water supply CW in the first water supply line 11 is stopped.

第２給水弁４１は、第２給水ライン１２に設けられる。第２給水弁４１は、第２給水ライン１２における給水ＣＷの送給の有無を切り換え可能である。給水ポンプ２１が駆動している状態で、第２給水弁４１が開放されると、補給水タンク４から送出された給水ＣＷは、第２給水ライン１２を介して給水タンク２に送給される。第２給水弁４１が閉鎖されると、第２給水ライン１２における給水ＣＷの送給が停止する。 A second water supply valve 41 is provided in the second water supply line 12 . The second water supply valve 41 can switch whether or not the water supply CW is supplied in the second water supply line 12 . When the second water supply valve 41 is opened while the water supply pump 21 is being driven, the water supply CW sent from the makeup water tank 4 is supplied to the water supply tank 2 via the second water supply line 12. . When the second water supply valve 41 is closed, the supply of the water supply CW through the second water supply line 12 is stopped.

＜制御装置＞
制御装置５０は、水位センサ５の検出水位値Ｌｓに基づいて、給水状態切換手段２０を制御する制御手段として機能する。制御装置５０は、コンピュータシステムを含む。 <Control device>
The control device 50 functions as control means for controlling the water supply state switching means 20 based on the water level value Ls detected by the water level sensor 5 . Controller 50 includes a computer system.

図２は、本実施形態に係る給水加温システム１を示す機能ブロック図である。図２に示すように、制御装置５０は、検出水位値取得部５１と、検出温度値取得部５２と、検出流量値取得部５３と、差分値算出部５４と、記憶部５５と、給水制御部５６と、熱源水制御部５７と、判定出力部５８と、を有する。 FIG. 2 is a functional block diagram showing the water supply heating system 1 according to this embodiment. As shown in FIG. 2, the control device 50 includes a detected water level value acquisition unit 51, a detected temperature value acquisition unit 52, a detected flow rate value acquisition unit 53, a difference value calculation unit 54, a storage unit 55, and water supply control. It has a unit 56 , a heat source water control unit 57 , and a determination output unit 58 .

検出水位値取得部５１は、水位センサ５の検出値を示す検出水位値Ｌｓを取得する。検出水位値Ｌｓは、給水タンク２の水位を示す。 The detected water level value obtaining unit 51 obtains a detected water level value Ls indicating the detected value of the water level sensor 5 . The detected water level value Ls indicates the water level of the water supply tank 2 .

検出温度値取得部５２は、給水入口温度センサ６Ａの検出値を示す検出温度値Ｔ１、給水出口温度センサ６Ｂの検出値を示す検出温度値Ｔ２、熱源水入口温度センサ７Ａの検出値を示す検出温度値Ｔ３、及び熱源水出口温度センサ７Ｂの検出値を示す検出温度値Ｔ４を取得する。検出温度値Ｔ１は、熱交換器１０に流入する給水ＣＷの入口温度を示す。検出温度値Ｔ２は、熱交換器１０から流出する給水ＣＷの出口温度を示す。検出温度値Ｔ３は、熱交換器１０に流入する熱源水ＳＷの入口温度を示す。検出温度値Ｔ４は、熱交換器１０から流出する熱源水ＳＷの出口温度を示す。 The detected temperature value acquiring unit 52 detects a detected temperature value T1 indicating the detection value of the water supply inlet temperature sensor 6A, a detection temperature value T2 indicating the detection value of the water supply outlet temperature sensor 6B, and a detection value indicating the detection value of the heat source water inlet temperature sensor 7A. A temperature value T3 and a detected temperature value T4 indicating the detected value of the heat source water outlet temperature sensor 7B are acquired. The detected temperature value T1 indicates the inlet temperature of the feed water CW flowing into the heat exchanger 10 . The detected temperature value T2 indicates the outlet temperature of the feed water CW flowing out of the heat exchanger 10 . The detected temperature value T3 indicates the inlet temperature of the heat source water SW flowing into the heat exchanger 10 . A detected temperature value T4 indicates the outlet temperature of the heat source water SW flowing out of the heat exchanger 10 .

検出流量値取得部５３は、給水流量センサ８の検出値を示す検出流量値ＦＭ１、及び熱源水流量センサ９の検出値を示す検出流量値ＦＭ２を取得する。検出流量値ＦＭ１は、熱交換器１０に流入する給水ＣＷの流量を示す。検出流量値ＦＭ２は、熱交換器１０に流入する熱源水ＳＷの流量を示す。 The detected flow rate value obtaining unit 53 obtains a detected flow rate value FM1 indicating the detection value of the water supply flow rate sensor 8 and a detected flow rate value FM2 indicating the detection value of the heat source water flow rate sensor 9 . The detected flow rate value FM1 indicates the flow rate of the feed water CW flowing into the heat exchanger 10 . The detected flow rate value FM2 indicates the flow rate of the heat source water SW flowing into the heat exchanger 10 .

差分値算出部５４は、給水出口温度センサ６Ｂの検出温度値Ｔ２と熱源水入口温度センサ７Ａの検出温度値Ｔ３との第２差分値ΔＴ２を算出する。すなわち、差分値算出部５４は、演算［Ｔ３－Ｔ２］を実行して、演算結果を出力する。 The difference value calculator 54 calculates a second difference value ΔT2 between the temperature value T2 detected by the water supply outlet temperature sensor 6B and the temperature value T3 detected by the heat source water inlet temperature sensor 7A. That is, the difference value calculator 54 executes the calculation [T3-T2] and outputs the calculation result.

記憶部５５は、検出水位値Ｌｓに係る設定水位値Ｌｒ（Ｌｒ１，Ｌｒ２，Ｌｒ３，Ｌｒ４）と、第２差分値ΔＴ２に係る目標温度値Ｔｒとを記憶する。設定水位値Ｌｒ及び目標温度値Ｔｒのそれぞれは、予め設定された値であり、記憶部５５に記憶される。 The storage unit 55 stores the set water level values Lr (Lr1, Lr2, Lr3, Lr4) related to the detected water level value Ls and the target temperature value Tr related to the second difference value ΔT2. Each of the set water level value Lr and the target temperature value Tr is a preset value and is stored in the storage unit 55 .

給水制御部５６は、水位センサ５の検出水位値Ｌｓに基づいて、給水流量調節手段２０Ａを制御する制御信号を出力する。給水制御部５６から出力される制御信号は、第１給水弁２２に出力する開度指定信号を含む。給水制御部５６は、水位センサ５の検出水位値Ｌｓと、記憶部５５に記憶されている設定水位値Ｌｒとに基づいて、第１給水弁２２に出力する開度指定信号を決定し、決定した開度指定信号を第１給水弁２２に出力する。 The water supply controller 56 outputs a control signal for controlling the water supply flow rate adjusting means 20A based on the water level value Ls detected by the water level sensor 5 . The control signal output from the water supply control unit 56 includes an opening designation signal output to the first water supply valve 22 . The water supply control unit 56 determines an opening designation signal to be output to the first water supply valve 22 based on the water level value Ls detected by the water level sensor 5 and the set water level value Lr stored in the storage unit 55. Then, the opening designation signal is output to the first water supply valve 22 .

熱源水制御部５７は、差分値算出部５４により算出された第２差分値ΔＴ２に基づいて、熱源水流量調節手段３０を制御する制御信号を出力する。本実施形態において、熱源水制御部５７は、熱交換器１０に給水ＣＷを通水中、差分値算出部５４により算出された第２差分値ΔＴ２が記憶部５５に記憶されている目標温度値Ｔｒとなるように、熱源水流量調節手段３０を制御する制御信号を出力する。熱源水制御部５７から出力される制御信号は、インバータ３２に出力される周波数指定信号を含む。熱源水制御部５７は、第２差分値ΔＴ２が目標温度値ＴｒとなるようにＰＩＤアルゴリズムにより熱源水ポンプ３１の駆動周波数を演算し、駆動周波数の演算値に対応する周波数指定信号をインバータ３２に出力する。 The heat source water control section 57 outputs a control signal for controlling the heat source water flow rate adjustment means 30 based on the second difference value ΔT2 calculated by the difference value calculation section 54 . In the present embodiment, the heat source water control unit 57 controls the second difference value ΔT2 calculated by the difference value calculation unit 54 to be the target temperature value Tr stored in the storage unit 55 while the feed water CW is being passed through the heat exchanger 10 . A control signal for controlling the heat source water flow rate adjusting means 30 is output so that A control signal output from heat source water control unit 57 includes a frequency designation signal output to inverter 32 . The heat source water control unit 57 calculates the drive frequency of the heat source water pump 31 by the PID algorithm so that the second difference value ΔT2 becomes the target temperature value Tr, and sends a frequency designation signal corresponding to the calculated value of the drive frequency to the inverter 32. Output.

判定出力部５８は、検出流量値ＦＭ１及び検出流量値ＦＭ２に基づいて、熱交換器１０の状態を判定する。判定出力部５８は、熱交換器１０の状態の判定結果を示す判定データを出力装置６０に出力する。出力装置６０は、判定データを表示可能な表示装置でもよいし、判定データをプリントアウト可能な印刷装置でもよい。表示装置として、液晶ディスプレイ（Liquid Crystal Display：ＬＣＤ）又は有機ＥＬディスプレイ（Organic Electroluminescence Display：ＯＥＬＤ）のようなフラットパネルディスプレイが例示される。 The determination output unit 58 determines the state of the heat exchanger 10 based on the detected flow rate value FM1 and the detected flow rate value FM2. The determination output unit 58 outputs determination data indicating the determination result of the state of the heat exchanger 10 to the output device 60 . The output device 60 may be a display device capable of displaying the judgment data, or may be a printing device capable of printing out the judgment data. As a display device, a flat panel display such as a liquid crystal display (LCD) or an organic EL display (organic electroluminescence display: OELD) is exemplified.

＜制御方法＞
（給水制御部の処理）
図３は、本実施形態に係る給水制御部の処理を説明するための図である。給水制御部５６は、水位センサ５の検出水位値Ｌｓに基づいて、給水タンク２への給水状態を切り換える。本実施形態において、給水制御部５６は、水位センサ５の検出水位値Ｌｓと記憶部５５に記憶されている設定水位値Ｌｒとに基づいて給水流量調節手段２０Ａを制御して、給水タンク２への給水流量を調整する。 <Control method>
(Processing of water supply control unit)
FIG. 3 is a diagram for explaining the processing of the water supply control unit according to this embodiment. The water supply controller 56 switches the state of water supply to the water supply tank 2 based on the water level value Ls detected by the water level sensor 5 . In this embodiment, the water supply control unit 56 controls the water supply flow rate adjusting means 20A based on the water level value Ls detected by the water level sensor 5 and the set water level value Lr stored in the storage unit 55 so that the water supply tank 2 is supplied with water. adjust the water supply flow rate.

図３に示すように、水位センサ５の検出水位値Ｌｓに係る給水タンク２の設定水位値Ｌｒとして、第１設定水位値Ｌｒ１と、第１設定水位値Ｌｒ１よりも高い第２設定水位値Ｌｒ２と、第１設定水位値Ｌｒ１よりも低い第３設定水位値Ｌｒ３と、第３設定水位値Ｌｒ３よりも高く且つ第２設定水位値Ｌｒ２よりも低い第４設定水位値Ｌｒ４とが設定される。 As shown in FIG. 3, a first set water level value Lr1 and a second set water level value Lr2 higher than the first set water level value Lr1 are set as the set water level value Lr of the water supply tank 2 related to the detected water level value Ls of the water level sensor 5. Then, a third set water level value Lr3 lower than the first set water level value Lr1 and a fourth set water level value Lr4 higher than the third set water level value Lr3 and lower than the second set water level value Lr2 are set.

水位センサ５の検出水位値Ｌｓが検出水位値取得部５１に取得される。給水制御部５６は、水位センサ５の検出水位値Ｌｓが第２設定水位値Ｌｒ２以上の高水位範囲にあると判定した場合、給水タンク２への給水流量がゼロになるように、給水流量調節手段２０Ａを制御する。すなわち、給水制御部５６は、給水タンク２への給水が停止されるように、第１給水弁２２及び第２給水弁４１のそれぞれの開度を制御する開度指定信号を決定して、第１給水弁２２及び第２給水弁４１に出力する。給水制御部５６は、給水タンク２への給水流量がゼロになるように、第１給水弁２２及び第２給水弁４１のそれぞれを閉鎖する開度指定信号（開度：０％）を出力する。給水制御部５６から開度指定信号が出力されると、第１給水弁２２及び第２給水弁４１のそれぞれが閉鎖され、給水タンク２への給水流量はゼロになる。 A detected water level value Ls of the water level sensor 5 is obtained by the detected water level value obtaining unit 51 . When the water level sensor 5 determines that the water level value Ls detected by the water level sensor 5 is in the high water level range equal to or higher than the second set water level value Lr2, the water supply control unit 56 adjusts the water supply flow rate so that the water supply flow rate to the water supply tank 2 becomes zero. Control means 20A. That is, the water supply control unit 56 determines opening degree designation signals for controlling the respective opening degrees of the first water supply valve 22 and the second water supply valve 41 so that water supply to the water supply tank 2 is stopped. It outputs to the first water supply valve 22 and the second water supply valve 41 . The water supply control unit 56 outputs an opening degree designation signal (opening degree: 0%) for closing each of the first water supply valve 22 and the second water supply valve 41 so that the water supply flow rate to the water supply tank 2 becomes zero. . When the water supply controller 56 outputs an opening designation signal, the first water supply valve 22 and the second water supply valve 41 are closed, and the flow rate of water supply to the water supply tank 2 becomes zero.

なお、給水制御部５６は、水位センサ５の検出水位値Ｌｓが第２設定水位値Ｌｒ２以上の高水位範囲にあると判定した場合、給水ポンプ２１を停止する。 Note that the water supply control unit 56 stops the water supply pump 21 when it determines that the water level value Ls detected by the water level sensor 5 is in the high water level range equal to or higher than the second set water level value Lr2.

給水制御部５６は、水位センサ５の検出水位値Ｌｓが第１設定水位値Ｌｒ１超過且つ第２設定水位値Ｌｒ２未満の範囲にあると判定した場合、検出水位値Ｌｓの上昇に伴って給水流量が所要流量からゼロに向かって段階的に減少されるように、給水流量調節手段２０Ａを制御する。換言すれば、給水制御部５６は、検出水位値Ｌｓが第１設定水位値Ｌｒ１超過且つ第２設定水位値Ｌｒ２未満の範囲にあると判定した場合、検出水位値Ｌｓの下降に伴って給水流量がゼロから所要流量に向かって段階的に増加されるように、給水流量調節手段２０Ａを制御する。 When the water supply control unit 56 determines that the detected water level value Ls of the water level sensor 5 is in the range of more than the first set water level value Lr1 and less than the second set water level value Lr2, the water supply flow rate increases as the detected water level value Ls rises. is decreased stepwise from the required flow rate to zero. In other words, when the water supply control unit 56 determines that the detected water level value Ls is in the range between the first set water level value Lr1 and the second set water level value Lr2, the water supply flow rate decreases as the detected water level value Ls decreases. is increased stepwise from zero toward the required flow rate, the water supply flow rate adjusting means 20A is controlled.

図３に示す例において、高水位範囲にあった検出水位値Ｌｓが第２設定水位値Ｌｒ２を下回り、水位センサ５の検出水位値Ｌｓが第２設定水位値Ｌｒ２と第２設定水位値Ｌｒ２よりも低い設定水位値Ｌｒａとの間の第１水位範囲にあると判定した場合、給水制御部５６は、給水タンク２への給水流量が第１流量になるように、給水流量調節手段２０Ａを制御する。給水制御部５６は、給水ポンプ２１が駆動されている状態で、熱交換器１０で加温された給水ＣＷが第１給水ライン１１を介して第１流量で給水タンク２に供給されるように、開度指定信号（開度：２０％）を第１給水弁２２に出力する。これにより、図１の矢印Ｆ１で示すように、補給水タンク４から送出され、第１給水ライン１１を流通する給水ＣＷは、熱交換器１０を介して給水タンク２に供給される。 In the example shown in FIG. 3, the detected water level value Ls in the high water level range is below the second set water level value Lr2, and the detected water level value Ls of the water level sensor 5 is lower than the second set water level value Lr2 and the second set water level value Lr2. If it is determined that the water level is within the first water level range between the lower set water level value Lra, the water supply control unit 56 controls the water supply flow rate adjusting means 20A so that the water supply flow rate to the water supply tank 2 becomes the first flow rate. do. The water supply controller 56 controls the supply of the water supply CW heated by the heat exchanger 10 to the water supply tank 2 through the first water supply line 11 at the first flow rate while the water supply pump 21 is being driven. , an opening designation signal (opening: 20%) is output to the first water supply valve 22 . As a result, the feed water CW sent from the make-up water tank 4 and flowing through the first feed water line 11 is supplied to the feed water tank 2 via the heat exchanger 10, as indicated by the arrow F1 in FIG.

第１水位範囲にあった検出水位値Ｌｓが設定水位値Ｌｒａを下回り、水位センサ５の検出水位値Ｌｓが設定水位値Ｌｒａと設定水位値Ｌｒａよりも低い設定水位値Ｌｒｂとの間の第２水位範囲にあると判定した場合、給水制御部５６は、給水タンク２への給水流量が第１流量よりも多い第２流量になるように、給水流量調節手段２０Ａを制御する。給水制御部５６は、給水ポンプ２１が駆動されている状態で、熱交換器１０で加温された給水ＣＷが第１給水ライン１１を介して第２流量で給水タンク２に供給されるように、開度指定信号（開度：４０％）を第１給水弁２２に出力する。 The detected water level value Ls that was in the first water level range is below the set water level value Lra, and the detected water level value Ls of the water level sensor 5 is the second between the set water level value Lra and the set water level value Lrb lower than the set water level value Lra. When it is determined that the water level is within the water level range, the water supply controller 56 controls the water supply flow rate adjusting means 20A so that the water supply flow rate to the water supply tank 2 becomes a second flow rate that is higher than the first flow rate. The water supply controller 56 controls the supply of the water supply CW heated by the heat exchanger 10 to the water supply tank 2 through the first water supply line 11 at the second flow rate while the water supply pump 21 is being driven. , an opening designation signal (opening: 40%) is output to the first water supply valve 22 .

第２水位範囲にあった検出水位値Ｌｓが設定水位値Ｌｒｂを下回り、水位センサ５の検出水位値Ｌｓが設定水位値Ｌｒｂと設定水位値Ｌｒｂよりも低い設定水位値Ｌｒｃとの間の第３水位範囲にあると判定した場合、給水制御部５６は、給水タンク２への給水流量が第２流量よりも多い第３流量になるように、給水流量調節手段２０Ａを制御する。給水制御部５６は、給水ポンプ２１が駆動されている状態で、熱交換器１０で加温された給水ＣＷが第１給水ライン１１を介して第３流量で給水タンク２に供給されるように、開度指定信号（開度：６０％）を第１給水弁２２に出力する。 The detected water level value Ls that was in the second water level range is below the set water level value Lrb, and the detected water level value Ls of the water level sensor 5 is the third between the set water level value Lrb and the set water level value Lrc lower than the set water level value Lrb. When it is determined that the water level is within the water level range, the water supply controller 56 controls the water supply flow rate adjusting means 20A so that the water supply flow rate to the water supply tank 2 becomes a third flow rate that is higher than the second flow rate. The water supply controller 56 controls the supply of the water supply CW heated by the heat exchanger 10 to the water supply tank 2 at the third flow rate through the first water supply line 11 while the water supply pump 21 is being driven. , an opening designation signal (opening: 60%) is output to the first water supply valve 22 .

第３水位範囲にあった検出水位値Ｌｓが設定水位値Ｌｒｃを下回り、水位センサ５の検出水位値Ｌｓが設定水位値Ｌｒｃと設定水位値Ｌｒｃよりも低い第１設定水位値Ｌｒ１との間の第４水位範囲にあると判定した場合、給水制御部５６は、給水タンク２への給水流量が第３流量よりも多い第４流量になるように、給水流量調節手段２０Ａを制御する。給水制御部５６は、給水ポンプ２１が駆動されている状態で、熱交換器１０で加温された給水ＣＷが第１給水ライン１１を介して第４流量で給水タンク２に供給されるように、開度指定信号（開度：８０％）を第１給水弁２２に出力する。 The detected water level value Ls in the third water level range falls below the set water level value Lrc, and the detected water level value Ls of the water level sensor 5 is between the set water level value Lrc and the first set water level value Lr1 lower than the set water level value Lrc. When it is determined that the water level is within the fourth water level range, the water supply controller 56 controls the water supply flow rate adjusting means 20A so that the water supply flow rate to the water supply tank 2 becomes a fourth flow rate that is higher than the third flow rate. The water supply controller 56 controls the supply of the water supply CW heated by the heat exchanger 10 to the water supply tank 2 at the fourth flow rate through the first water supply line 11 while the water supply pump 21 is being driven. , an opening designation signal (opening: 80%) is output to the first water supply valve 22 .

第４水位範囲にあった検出水位値Ｌｓが第１設定水位値Ｌｒ１を下回り、水位センサ５の検出水位値Ｌｓが第１設定水位値Ｌｒ１以下の所要水位範囲にあると判定した場合、給水制御部５６は、給水タンク２への給水流量が第４流量よりも多い所要流量になるように、給水流量調節手段２０Ａを制御する。給水制御部５６は、給水ポンプ２１が駆動されている状態で、熱交換器１０で加温された給水ＣＷが第１給水ライン１１を介して所要流量で給水タンク２に供給されるように、開度指定信号を第１給水弁２２に出力する。 When it is determined that the detected water level value Ls in the fourth water level range is below the first set water level value Lr1 and the detected water level value Ls of the water level sensor 5 is in the required water level range of the first set water level value Lr1 or less, water supply control The unit 56 controls the water supply flow rate adjusting means 20A so that the water supply flow rate to the water supply tank 2 becomes a required flow rate higher than the fourth flow rate. The water supply control unit 56 is configured to supply the water supply CW heated by the heat exchanger 10 to the water supply tank 2 at a required flow rate through the first water supply line 11 while the water supply pump 21 is being driven. An opening designation signal is output to the first water supply valve 22 .

所要流量は、例えば給水流量調節手段２０Ａが調節可能な最大流量である。給水制御部５６は、給水タンク２への給水流量が最大流量になるように、第１給水弁２２を開放する開度指定信号（開度：１００％）を出力する。第１給水弁２２の開度は、最大開度に調節される。なお、所要流量は、最大流量よりも少なくてもよく、例えば９０～９５％の開度指定信号を出力することもできる。 The required flow rate is, for example, the maximum flow rate that can be adjusted by the water supply flow rate adjusting means 20A. The water supply control unit 56 outputs an opening degree designation signal (opening degree: 100%) for opening the first water supply valve 22 so that the water supply flow rate to the water supply tank 2 becomes the maximum flow rate. The degree of opening of the first water supply valve 22 is adjusted to the maximum degree of opening. Note that the required flow rate may be less than the maximum flow rate, and for example, it is possible to output an opening designation signal of 90 to 95%.

所要水位範囲にあった検出水位値Ｌｓが第１設定水位値Ｌｒ１よりも低い第３設定水位値Ｌｒ３以下の低水位範囲にあると判定した場合、給水制御部５６は、第１給水弁２２が開放されている状態で、第２給水弁４１を開放する。すなわち、給水制御部５６は、給水ポンプ２１が駆動されている状態で、熱交換器１０を通過した給水ＣＷが第１給水ライン１１を介して給水タンク２に供給され、熱交換器１０を通過しない給水ＣＷが第２給水ライン１２を介して給水タンク２に供給されるように、開度指定信号を第１給水弁２２及び第２給水弁４１のそれぞれに出力する。これにより、図１の矢印Ｆ２で示すように、補給水タンク４から送出され、第２給水ライン１２を流通する給水ＣＷは、熱交換器１０を介さずに給水タンク２に供給される。第１給水弁２２の開度及び第２給水弁４１の開度のそれぞれは、最大開度に調節される。これにより、低水位範囲にあった給水ＣＷの水位は、短時間で上昇する。 When it is determined that the detected water level value Ls, which was in the required water level range, is in the low water level range equal to or lower than the third set water level value Lr3 which is lower than the first set water level value Lr1, the water supply control unit 56 determines that the first water supply valve 22 is The second water supply valve 41 is opened while it is open. That is, the water supply control unit 56 supplies the water supply CW that has passed through the heat exchanger 10 to the water supply tank 2 through the first water supply line 11 and passes through the heat exchanger 10 while the water supply pump 21 is being driven. An opening designation signal is output to each of the first water supply valve 22 and the second water supply valve 41 so that the water supply CW that is not supplied is supplied to the water supply tank 2 via the second water supply line 12 . As a result, the feed water CW sent from the make-up water tank 4 and flowing through the second feed water line 12 is supplied to the feed water tank 2 without passing through the heat exchanger 10, as indicated by an arrow F2 in FIG. The degree of opening of the first water supply valve 22 and the degree of opening of the second water supply valve 41 are each adjusted to the maximum degree of opening. As a result, the water level of the feed water CW, which has been in the low water level range, rises in a short period of time.

第１給水弁２２及び第２給水弁４１のそれぞれが開放され、給水タンク２において給水ＣＷの水位が上昇している状態において、水位センサ５の検出水位値Ｌｓが第３設定水位値Ｌｒ３よりも高く且つ第２設定水位値Ｌｒ２よりも低い第４設定水位値Ｌｒ４以上であると判定した場合、給水制御部５６は、第１給水弁２２が開放されている状態で、第２給水弁４１を閉鎖する。図３に示す例では、第４設定水位値Ｌｒ４は、第１設定水位値Ｌｒ１と同一である。なお、第４設定水位値Ｌｒ４は、第１設定水位値Ｌｒ１と同一でなくてもよいが、給水タンク２の平均水温を過度に低下させない観点から、第３設定水位値Ｌｒ３超過且つ第１設定水位値Ｌｒ１以下であることが望ましい。給水タンク２において給水ＣＷの水位が更に上昇し、水位センサ５の検出水位値Ｌｓが第２設定水位値Ｌｒ２以上であると判定した場合、給水制御部５６は、第２給水弁４１が閉鎖されている状態で、第１給水弁２２も閉鎖する。 In a state in which the first water supply valve 22 and the second water supply valve 41 are each opened and the water level of the water supply CW in the water supply tank 2 is rising, the water level value Ls detected by the water level sensor 5 is higher than the third set water level value Lr3. When it is determined that the water level is equal to or higher than the fourth set water level value Lr4 which is higher and lower than the second set water level value Lr2, the water supply control unit 56 closes the second water supply valve 41 while the first water supply valve 22 is open. to close. In the example shown in FIG. 3, the fourth set water level value Lr4 is the same as the first set water level value Lr1. The fourth set water level value Lr4 does not have to be the same as the first set water level value Lr1. It is desirable that the water level value Lr1 or less. When the water level of the water supply CW in the water supply tank 2 further rises and it is determined that the water level value Ls detected by the water level sensor 5 is equal to or higher than the second set water level value Lr2, the water supply control unit 56 closes the second water supply valve 41. In this state, the first water supply valve 22 is also closed.

（熱源水制御部の処理）
第１給水ライン１１に給水ＣＷが流通し、熱交換器１０に給水ＣＷを通水中、熱源水制御部５７は、熱源水入口温度センサ７Ａの検出温度値Ｔ３と給水出口温度センサ６Ｂの検出温度値Ｔ２との第２差分値ΔＴ２が予め設定された目標温度値Ｔｒとなるように、熱源水流量調節手段３０をフィードバック制御する。目標温度値Ｔｒは、例えば３℃である。なお、目標温度値Ｔｒは、３℃でなくてもよく、１℃以上１０℃以下の範囲において任意に設定される。熱交換器１０に流入する熱源水ＳＷの入口温度は、熱交換器１０から流出する給水ＣＷの出口温度よりも高い。 (Processing of heat source water control unit)
While the feed water CW is flowing through the first feed water line 11 and the feed water CW is being passed through the heat exchanger 10, the heat source water control unit 57 controls the detected temperature value T3 of the heat source water inlet temperature sensor 7A and the detected temperature of the feed water outlet temperature sensor 6B. The heat source water flow rate adjusting means 30 is feedback-controlled so that the second difference value ΔT2 from the value T2 becomes the preset target temperature value Tr. The target temperature value Tr is, for example, 3°C. Note that the target temperature value Tr does not have to be 3°C, and is arbitrarily set within the range of 1°C or higher and 10°C or lower. The inlet temperature of the heat source water SW flowing into the heat exchanger 10 is higher than the outlet temperature of the feed water CW flowing out of the heat exchanger 10 .

第２差分値ΔＴ２が目標温度値Ｔｒよりも大きいことは、熱交換器１０から流出する給水ＣＷが十分に加温されていないことを意味する。第２差分値ΔＴ２が目標温度値Ｔｒよりも大きい場合、熱源水制御部５７は、熱源水ライン１３を流通する熱源水ＳＷの流量を増加させるように、熱源水流量調節手段３０を制御する。熱源水制御部５７は、第２差分値ΔＴ２が大きいほど熱源水ライン１３を流通する熱源水ＳＷの流量が多くなるように、熱源水流量調節手段３０を制御する。 That the second difference value ΔT2 is larger than the target temperature value Tr means that the feed water CW flowing out of the heat exchanger 10 is not sufficiently heated. When the second difference value ΔT2 is greater than the target temperature value Tr, the heat source water controller 57 controls the heat source water flow rate adjustment means 30 to increase the flow rate of the heat source water SW flowing through the heat source water line 13 . The heat source water control unit 57 controls the heat source water flow rate adjusting means 30 such that the flow rate of the heat source water SW flowing through the heat source water line 13 increases as the second difference value ΔT2 increases.

上述のように、給水制御部５６は、水位センサ５の検出水位値Ｌｓに基づいて、第１給水ライン１１を流通する給水ＣＷの流量を変更する。例えば第１給水ライン１１を流通する給水ＣＷの流量が多い場合、熱源水ライン１３を流通する熱源水ＳＷの流量が少ないと、給水ＣＷは十分に加温されず、第２差分値ΔＴ２は目標温度値Ｔｒよりも大きくなる。第２差分値ΔＴ２が目標温度値Ｔｒよりも大きい場合、熱源水制御部５７は、熱源水ライン１３を流通する熱源水ＳＷの流量を増加させるように、熱源水流量調節手段３０を制御する。これにより、給水タンク２に送給される給水ＣＷは、熱交換器１０において十分に加温される。 As described above, the water supply controller 56 changes the flow rate of the water supply CW flowing through the first water supply line 11 based on the water level value Ls detected by the water level sensor 5 . For example, when the flow rate of the feed water CW flowing through the first water supply line 11 is high, if the flow rate of the heat source water SW flowing through the heat source water line 13 is low, the feed water CW is not sufficiently heated, and the second difference value ΔT2 reaches the target value. It becomes larger than the temperature value Tr. When the second difference value ΔT2 is greater than the target temperature value Tr, the heat source water controller 57 controls the heat source water flow rate adjustment means 30 to increase the flow rate of the heat source water SW flowing through the heat source water line 13 . Thereby, the feed water CW supplied to the feed water tank 2 is sufficiently heated in the heat exchanger 10 .

一方、第１給水ライン１１を流通する給水ＣＷの流量が少ない場合、熱源水ライン１３を流通する熱源水ＳＷの流量が少なくても、第２差分値ΔＴ２を目標温度値Ｔｒに近付けることができる。すなわち、第１給水ライン１１を流通する給水ＣＷの流量が少ない場合、熱源水制御部５７は、熱源水ポンプ３１の駆動周波数を低くしても、第２差分値ΔＴ２を目標温度値Ｔｒにすることができる。第１給水ライン１１を流通する給水ＣＷの流量が少ない場合、熱源水ポンプ３１の回転速度（駆動周波数）を高くしなくても済むため、熱源水ポンプ３１の消費電力が抑制される。また、熱源水ＳＷの流量が抑制されるため、熱源水ライン１３の下流端１３Ｂから排出される熱源水ＳＷの量が削減される。 On the other hand, when the flow rate of the water supply CW flowing through the first water supply line 11 is low, even if the flow rate of the heat source water SW flowing through the heat source water line 13 is low, the second difference value ΔT2 can be brought close to the target temperature value Tr. . That is, when the flow rate of the water supply CW flowing through the first water supply line 11 is small, the heat source water control unit 57 sets the second difference value ΔT2 to the target temperature value Tr even if the driving frequency of the heat source water pump 31 is lowered. be able to. When the flow rate of the water supply CW flowing through the first water supply line 11 is small, the power consumption of the heat source water pump 31 is suppressed because the rotation speed (driving frequency) of the heat source water pump 31 does not need to be increased. Moreover, since the flow rate of the heat source water SW is suppressed, the amount of the heat source water SW discharged from the downstream end 13B of the heat source water line 13 is reduced.

（判定出力部の処理）
判定出力部５８は、検出流量値ＦＭ１及び検出流量値ＦＭ２に基づいて、熱交換器１０の状態を判定する。熱交換器１０の状態は、熱交換器１０の熱伝達性能の状態を含む。 (Processing of judgment output section)
The determination output unit 58 determines the state of the heat exchanger 10 based on the detected flow rate value FM1 and the detected flow rate value FM2. The state of heat exchanger 10 includes the state of heat transfer performance of heat exchanger 10 .

例えば熱交換器１０が新品時においては、熱交換器１０の熱伝達性能は良好である。一方、例えば熱交換器１０の長期間の使用により熱交換器１０が汚染されると、熱交換器１０の汚染に起因して、熱伝達性能が不良になる可能性がある。熱交換器１０に対する給水ＣＷの給水状態が一定でも、熱交換器１０の熱伝達性能が良好な場合と不良な場合とでは、第２差分値ΔＴ２を目標温度値Ｔｒに調整するために必要な熱源水ＳＷの流量は異なる。熱交換器１０の熱伝達性能が不良な状態において第２差分値ΔＴ２を目標温度値Ｔｒに調整するために必要な熱源水ＳＷの流量は、熱交換器１０の熱伝達性能が良好な状態において第２差分値ΔＴ２を目標温度値Ｔｒに調整するために必要な熱源水ＳＷの流量よりも多くなる。 For example, when the heat exchanger 10 is new, the heat transfer performance of the heat exchanger 10 is good. On the other hand, if the heat exchanger 10 becomes contaminated due to, for example, long-term use of the heat exchanger 10, the heat transfer performance may become poor due to the contamination of the heat exchanger 10. Even if the feed water condition of the feed water CW to the heat exchanger 10 is constant, depending on whether the heat transfer performance of the heat exchanger 10 is good or bad, the temperature required to adjust the second difference value ΔT2 to the target temperature value Tr is The flow rate of the heat source water SW is different. The flow rate of the heat source water SW required to adjust the second difference value ΔT2 to the target temperature value Tr when the heat transfer performance of the heat exchanger 10 is poor is It is larger than the flow rate of the heat source water SW required to adjust the second difference value ΔT2 to the target temperature value Tr.

例えば、熱交換器１０の熱伝達性能が良好である場合、熱源水ライン１３を流通する熱源水ＳＷの流量が少なくても、給水ＣＷは十分に加温されるため、第２差分値ΔＴ２を目標温度値Ｔｒに近付けることができる。一方、熱交換器１０の熱伝達性能が不良である場合、給水ＣＷを十分に加温して第２差分値ΔＴ２を目標温度値Ｔｒに近付けるためには、熱源水ライン１３を流通する熱源水ＳＷの流量を多くしなければならない。このように、第２差分値ΔＴ２を目標温度値Ｔｒに調整するために必要な熱源水ＳＷの流量は、熱交換器１０の熱伝達性能に応じて変化する。 For example, when the heat transfer performance of the heat exchanger 10 is good, even if the flow rate of the heat source water SW flowing through the heat source water line 13 is small, the feed water CW is sufficiently heated. It is possible to approach the target temperature value Tr. On the other hand, when the heat transfer performance of the heat exchanger 10 is poor, in order to sufficiently heat the feed water CW and bring the second difference value ΔT2 closer to the target temperature value Tr, the heat source water flowing through the heat source water line 13 The flow rate of SW must be increased. Thus, the flow rate of the heat source water SW required to adjust the second difference value ΔT2 to the target temperature value Tr changes according to the heat transfer performance of the heat exchanger 10.

判定出力部５８は、熱交換器１０に供給される給水ＣＷの流量を示す検出流量値ＦＭ１及び熱交換器１０に供給される熱源水ＳＷの流量を示す検出流量値ＦＭ２に基づいて、熱交換器１０の熱伝達性能の状態を判定する。例えば検出流量値ＦＭ１が一定の状態において、第２差分値ΔＴ２を目標温度値Ｔｒにするために必要な熱源水ＳＷの流量が多くなり、検出流量値ＦＭ２が閾値よりも増加した場合、判定出力部５８は、熱交換器１０の熱伝達性能が悪化したと判定することができる。 The determination output unit 58 performs heat exchange based on a detected flow rate value FM1 indicating the flow rate of the feed water CW supplied to the heat exchanger 10 and a detected flow rate value FM2 indicating the flow rate of the heat source water SW supplied to the heat exchanger 10. Determine the state of heat transfer performance of vessel 10 . For example, when the detected flow rate value FM1 is constant and the flow rate of the heat source water SW required to make the second difference value ΔT2 equal to the target temperature value Tr increases, and the detected flow rate value FM2 increases more than the threshold value, the determination output The unit 58 can determine that the heat transfer performance of the heat exchanger 10 has deteriorated.

本実施形態において、熱伝達性能が良好な状態の熱交換器１０に流入する給水ＣＷの流量と、給水ＣＷが熱交換器１０に供給されたときに第２差分値ΔＴ２を目標温度値Ｔｒにするために要求される熱源水ＳＷの流量との関係を示す相関データ又は相関式が記憶部５５に予め記憶されている。本実施形態においては、相関式［ＦＭ２＝ＦＭ１×α］が記憶部５５に記憶されている。検出流量値取得部５３に取得された検出流量値ＦＭ１及び検出流量値ＦＭ２が、相関式［ＦＭ２≦ＦＭ１×α］の条件を満足する場合、熱交換器１０の熱伝達性能は良好である。一方、熱交換器１０の熱伝達性能が悪化すると、第２差分値ΔＴ２を目標温度値Ｔｒに調整するために要求される熱源水ＳＷの流量が増加し、検出流量値ＦＭ２は増加する。すなわち、熱交換器１０の熱伝達性能が悪化すると、検出流量値ＦＭ１と検出流量値ＦＭ２とは、［ＦＭ２＞ＦＭ１×α］の関係を示すこととなる。熱交換器１０の熱伝達性能の悪化が進行すると、［ＦＭ２］と［ＦＭ１×α］との差は大きくなる。 In the present embodiment, the flow rate of the feed water CW flowing into the heat exchanger 10 with good heat transfer performance and the second difference value ΔT2 when the feed water CW is supplied to the heat exchanger 10 are set to the target temperature value Tr. Correlation data or a correlation expression indicating the relationship with the flow rate of the heat source water SW required for the above is stored in advance in the storage unit 55 . In this embodiment, the correlation equation [FM2=FM1×α] is stored in the storage unit 55. FIG. When the detected flow rate value FM1 and the detected flow rate value FM2 acquired by the detected flow rate acquisition unit 53 satisfy the condition of the correlation formula [FM2≦FM1×α], the heat transfer performance of the heat exchanger 10 is good. On the other hand, when the heat transfer performance of the heat exchanger 10 deteriorates, the flow rate of the heat source water SW required to adjust the second difference value ΔT2 to the target temperature value Tr increases, and the detected flow rate value FM2 increases. That is, when the heat transfer performance of the heat exchanger 10 deteriorates, the detected flow rate value FM1 and the detected flow rate value FM2 show a relationship of [FM2>FM1×α]. As the deterioration of the heat transfer performance of the heat exchanger 10 progresses, the difference between [FM2] and [FM1×α] increases.

判定出力部５８は、検出流量値取得部５３に取得された検出流量値ＦＭ１及び検出流量値ＦＭ２が［ＦＭ２≦ＦＭ１×α］の条件を満足する場合、熱交換器１０の状態は良好であると判定し、検出流量値取得部５３に取得された検出流量値ＦＭ１及び検出流量値ＦＭ２が［ＦＭ２≦ＦＭ１×α］の条件を満足しない場合、熱交換器１０の状態は不良であると判定することができる。 When the detected flow rate value FM1 and the detected flow rate value FM2 obtained by the detected flow rate value obtaining section 53 satisfy the condition [FM2≦FM1×α], the determination output section 58 determines that the heat exchanger 10 is in good condition. If the detected flow rate value FM1 and the detected flow rate value FM2 obtained by the detected flow rate value obtaining unit 53 do not satisfy the condition [FM2≦FM1×α], the heat exchanger 10 is determined to be in a bad state. can do.

判定出力部５８は、熱交換器１０の状態の判定結果を示す判定データを出力装置６０に出力する。出力装置６０は、判定出力部５８の判定データを出力する。出力装置６０が表示装置である場合、判定出力部５８の判定データが表示装置に表示される。作業者は、出力装置６０から出力された判定データに基づいて、例えば熱交換器１０の洗浄等のメンテナンスを実施することができる。 The determination output unit 58 outputs determination data indicating the determination result of the state of the heat exchanger 10 to the output device 60 . The output device 60 outputs determination data from the determination output section 58 . If the output device 60 is a display device, the determination data of the determination output section 58 is displayed on the display device. The operator can perform maintenance such as cleaning of the heat exchanger 10 based on the determination data output from the output device 60 .

＜効果＞
以上説明したように、本実施形態によれば、熱源水ＳＷとの熱交換により給水ＣＷを加温する熱交換器１０を有する給水加温システム１において、給水タンク２の検出水位値Ｌｓに基づいて、給水タンク２への給水状態を切り換える給水状態切換手段２０が制御される。検出水位値Ｌｓに基づいて、給水タンク２への給水状態が最適に切り換えられることにより、熱源水ＳＷから効率良く熱回収することができる。 <effect>
As described above, according to the present embodiment, in the feed water heating system 1 having the heat exchanger 10 that heats the feed water CW by heat exchange with the heat source water SW, based on the detected water level value Ls of the feed water tank 2 Then, the water supply state switching means 20 for switching the state of water supply to the water supply tank 2 is controlled. By optimally switching the state of water supply to the water supply tank 2 based on the detected water level value Ls, heat can be efficiently recovered from the heat source water SW.

本実施形態においては、図３を参照して説明したように、給水タンク２の水位の上昇に伴って、熱交換器１０から給水タンク２に供給される給水流量が段階的に減少され、給水タンク２の水位の下降に伴って、熱交換器１０から給水タンク２に供給される給水流量が段階的に増加される。これにより、検出水位値Ｌｓが第２設定水位値Ｌｒ２未満の状態においては、給水タンク２の給水ＣＷの水位を適切に維持した状態で、熱源水ＳＷから効率良く熱回収し続けることができる。 In this embodiment, as described with reference to FIG. As the water level in the tank 2 decreases, the flow rate of water supplied from the heat exchanger 10 to the water tank 2 is increased stepwise. As a result, when the detected water level value Ls is less than the second set water level value Lr2, it is possible to continue efficiently recovering heat from the heat source water SW while appropriately maintaining the water level of the water supply CW in the water supply tank 2.

本実施形態においては、検出水位値Ｌｓが第３設定水位値Ｌｒ３以下になると第２給水弁４１が開放される。これにより、ボイラ８０の高負荷運転により低水位範囲にある給水ＣＷの水位を短時間で上昇させることができる。また、検出水位値Ｌｓが第１設定水位値Ｌｒ１以上になると第２給水弁４１が閉鎖される。これにより、給水タンク２の平均水温の過度な低下が防止される。 In this embodiment, the second water supply valve 41 is opened when the detected water level value Ls becomes equal to or lower than the third set water level value Lr3. As a result, the water level of the feed water CW in the low water level range can be raised in a short period of time by the high load operation of the boiler 80 . Further, when the detected water level value Ls becomes equal to or higher than the first set water level value Lr1, the second water supply valve 41 is closed. This prevents the average water temperature of the water supply tank 2 from excessively decreasing.

本実施形態においては、熱交換器１０に流入する熱源水ＳＷの検出温度値Ｔ３と熱交換器１０から流出する給水ＣＷの検出温度値Ｔ２との第２差分値ΔＴ２が予め設定された目標温度値Ｔｒとなるように熱源水流量調節手段３０が制御される。例えば熱交換器１０に流入する給水ＣＷの流量が多かったり給水ＣＷの温度が低かったりした場合、第２差分値ΔＴ２が目標温度値Ｔｒになるように熱源水流量調節手段３０が制御されることにより、給水タンク２に送給される給水ＣＷは、熱交換器１０において十分に加温される。一方、熱交換器１０に流入する給水ＣＷの流量が少なかったり給水ＣＷの温度が高かったりした場合、熱源水ライン１３を流通する熱源水ＳＷの流量が少なくても、第２差分値ΔＴ２を目標温度値Ｔｒに近付けることができる。熱交換器１０に流入する給水ＣＷの流量が少なかったり給水ＣＷの温度が高かったりした場合、熱源水ポンプ３１の回転速度（駆動周波数）を高くしなくても済むため、熱源水ポンプ３１の消費電力が抑制される。また、熱源水ＳＷの流量が抑制されるため、熱源水ライン１３の下流端１３Ｂから排出される熱源水ＳＷの量が削減される。 In the present embodiment, the second difference value ΔT2 between the detected temperature value T3 of the heat source water SW flowing into the heat exchanger 10 and the detected temperature value T2 of the feed water CW flowing out of the heat exchanger 10 is a preset target temperature. The heat source water flow rate adjusting means 30 is controlled so as to obtain the value Tr. For example, when the flow rate of the feed water CW flowing into the heat exchanger 10 is high or the temperature of the feed water CW is low, the heat source water flow rate adjusting means 30 is controlled so that the second difference value ΔT2 becomes the target temperature value Tr. Thus, the feed water CW supplied to the feed water tank 2 is sufficiently heated in the heat exchanger 10 . On the other hand, when the flow rate of the feed water CW flowing into the heat exchanger 10 is low or the temperature of the feed water CW is high, even if the flow rate of the heat source water SW flowing through the heat source water line 13 is low, the second difference value ΔT2 is the target. It can be brought close to the temperature value Tr. When the flow rate of the feed water CW flowing into the heat exchanger 10 is low or the temperature of the feed water CW is high, the rotation speed (driving frequency) of the heat source water pump 31 does not need to be increased. Power is curtailed. Moreover, since the flow rate of the heat source water SW is suppressed, the amount of the heat source water SW discharged from the downstream end 13B of the heat source water line 13 is reduced.

［第２実施形態］
第２実施形態について説明する。以下の説明において、上述の実施形態と同一の構成要素については同一の符号を付し、その説明を簡略又は省略する。 [Second embodiment]
A second embodiment will be described. In the following description, the same reference numerals are given to the same constituent elements as in the above-described embodiment, and the description thereof will be simplified or omitted.

図４は、本実施形態に係る給水加温システム１を示す機能ブロック図である。上述の第１実施形態においては、給水流量調節手段２０Ａが、予め設定された駆動周波数に応じた回転速度で駆動される給水ポンプ２１と、給水ポンプ２１の吐出側又は吸込側に設けられ、入力された開度指定信号に対応する開度で作動される第１給水弁２２と、を有することとした。図４に示すように、給水流量調節手段２０Ａは、熱交換器１０の上流側の第１給水ライン１１に設けられ、入力された駆動周波数に応じた回転速度で駆動される給水ポンプ２１Ｂと、入力された周波数指定信号に対応する駆動周波数を給水ポンプ２１に出力するインバータ２３（第１インバータ）と、を有してもよい。給水制御部５６は、水位センサ５の検出水位値Ｌｓに基づいて、インバータ２３に出力する周波数指定信号を決定してもよい。この場合、第１給水弁（２１）は省略されてもよい。 FIG. 4 is a functional block diagram showing the water supply heating system 1 according to this embodiment. In the above-described first embodiment, the water supply flow rate adjusting means 20A is provided on the water supply pump 21 driven at a rotation speed corresponding to a preset driving frequency, and on the discharge side or the suction side of the water supply pump 21, and the input and a first water supply valve 22 that is operated at an opening degree corresponding to the opening designation signal. As shown in FIG. 4, the water supply flow rate adjusting means 20A is provided in the first water supply line 11 on the upstream side of the heat exchanger 10, and is driven at a rotational speed corresponding to the input drive frequency. and an inverter 23 (first inverter) that outputs a drive frequency corresponding to the input frequency designation signal to the water supply pump 21 . The water supply control unit 56 may determine the frequency specifying signal to be output to the inverter 23 based on the water level value Ls detected by the water level sensor 5 . In this case, the first water supply valve (21) may be omitted.

また、上述の第１実施形態においては、熱源水流量調節手段３０が、入力された駆動周波数に応じた回転速度で駆動される熱源水ポンプ３１と、入力された周波数指定信号に対応する駆動周波数を熱源水ポンプ３１に出力するインバータ３２と、を有することとした。図４に示すように、熱源水流量調節手段３０は、熱交換器１０の上流側の熱源水ライン１３に設けられ、予め設定された駆動周波数に応じた回転速度で駆動される熱源水ポンプ３１Ｂと、熱源水ポンプ３１Ｂの吐出側又は吸込側に設けられ、入力された開度指定信号に対応する開度で作動される熱源水弁３３と、を有してもよい。 Further, in the above-described first embodiment, the heat source water flow rate adjusting means 30 includes the heat source water pump 31 driven at a rotational speed corresponding to the input drive frequency, and the drive frequency corresponding to the input frequency designation signal. to the heat source water pump 31 . As shown in FIG. 4, the heat source water flow rate adjusting means 30 is provided in the heat source water line 13 on the upstream side of the heat exchanger 10, and is driven at a rotational speed corresponding to a preset driving frequency. and a heat source water valve 33 that is provided on the discharge side or the suction side of the heat source water pump 31B and is operated at an opening degree corresponding to the inputted opening degree designation signal.

［第３実施形態］
第３実施形態について説明する。以下の説明において、上述の実施形態と同一の構成要素については同一の符号を付し、その説明を簡略又は省略する。 [Third Embodiment]
A third embodiment will be described. In the following description, the same reference numerals are given to the same constituent elements as in the above-described embodiment, and the description thereof will be simplified or omitted.

図５は、本実施形態に係る給水加温システム１を示す模式図である。図５に示すように、給水状態切換手段２０は、熱交換器１０の下流側の第１給水ライン１１から分岐し、熱交換器１０を通過後の給水ＣＷを補給水タンク４に還流させる還流ライン１７と、給水ＣＷの給水タンク２への送給と、補給水タンク４への還流とを切り換える第１流路切換手段２４と、を有して構成される。第１流路切換手段２４は、三方弁を含む。なお、複数の二方弁により第１流路切換手段２４の機能が発揮されてもよい。 FIG. 5 is a schematic diagram showing the water supply heating system 1 according to this embodiment. As shown in FIG. 5 , the feed water state switching means 20 branches from the first feed water line 11 on the downstream side of the heat exchanger 10 , and returns the feed water CW after passing through the heat exchanger 10 to the make-up water tank 4 . It is composed of a line 17 and a first channel switching means 24 for switching between feeding the water CW to the water tank 2 and returning it to the make-up water tank 4 . The first channel switching means 24 includes a three-way valve. In addition, the function of the 1st flow-path switching means 24 may be exhibited by several two-way valves.

第１流路切換手段２４は、第１給水ライン１１において、熱交換器１０と下流端１１Ｂとの間に設けられる。図５に示す例において、第１流路切換手段２４は、熱交換器１０と合流部１１Ｄとの間に設けられる。第１給水弁２２が設けられている場合、第１流路切換手段２４は、熱交換器１０と第１給水弁２２との間に設けられる。 The first flow path switching means 24 is provided in the first water supply line 11 between the heat exchanger 10 and the downstream end 11B. In the example shown in FIG. 5, the first flow path switching means 24 is provided between the heat exchanger 10 and the confluence portion 11D. When the first water supply valve 22 is provided, the first flow path switching means 24 is provided between the heat exchanger 10 and the first water supply valve 22 .

還流ライン１７の上流端１７Ａは、第１流路切換手段２４に接続される。還流ライン１７の下流端１７Ｂは、補給水タンク４に接続される。 An upstream end 17A of the reflux line 17 is connected to the first channel switching means 24 . A downstream end 17B of the reflux line 17 is connected to the makeup water tank 4 .

給水制御部５６は、水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５未満の場合、熱交換器１０を通過後の給水ＣＷを給水タンク２に送給するように第１流路切換手段２４を切り換える。給水制御部５６は、水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５以上の場合、熱交換器１０を通過後の給水ＣＷを補給水タンク４に還流させるように第１流路切換手段２４を切り換える。 When the water level value Ls detected by the water level sensor 5 is less than the fifth set water level value Lr5, the water supply control unit 56 switches the first flow path so that the water supply CW that has passed through the heat exchanger 10 is supplied to the water supply tank 2. switch the means 24; When the water level value Ls detected by the water level sensor 5 is equal to or higher than the fifth set water level value Lr5, the water supply control unit 56 switches the first flow path so that the water supply CW that has passed through the heat exchanger 10 is returned to the makeup water tank 4. switch the means 24;

本実施形態において、第５設定水位値Ｌｒ５は、図３を参照して説明した第２設定水位値Ｌｒ２と同一である。水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５未満の場合、給水制御部５６は、熱交換器１０を通過後の給水ＣＷを給水タンク２に送給するように第１流路切換手段２４を切り換えた状態で、上述の第１実施形態と同様に、検出水位値Ｌｓの下降に伴って給水タンク２に対する給水流量がゼロから所要流量に向かって段階的に増加されるように第１給水弁２２を制御する。 In this embodiment, the fifth set water level value Lr5 is the same as the second set water level value Lr2 described with reference to FIG. When the water level value Ls detected by the water level sensor 5 is less than the fifth set water level value Lr5, the water supply control unit 56 switches the first flow path so as to supply the water supply CW after passing through the heat exchanger 10 to the water supply tank 2. In a state where the means 24 is switched, as in the first embodiment, the water supply flow rate to the water supply tank 2 is increased stepwise from zero toward the required flow rate as the detected water level value Ls decreases. 1 to control the water supply valve 22;

水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５以上の場合、すなわち、検出水位値Ｌｓが高水位範囲にある場合、給水制御部５６は、熱交換器１０を通過後の給水ＣＷを補給水タンク４に還流させるように第１流路切換手段２４を切り換える。これにより、熱交換器１０で加温された給水ＣＷは、図５の矢印Ｆ４で示すように、補給水タンク４に還流される。給水ＣＷは、熱交換器１０を含む第１給水ライン１１の一部と、還流ライン１７と、補給水タンク４とを含む循環ラインにおいて、循環する。熱交換器１０を通過した給水ＣＷが補給水タンク４に供給されるので、補給水タンク４に貯留される給水ＣＷの温度は上昇する。 When the detected water level value Ls of the water level sensor 5 is equal to or higher than the fifth set water level value Lr5, that is, when the detected water level value Ls is in the high water level range, the feed water control unit 56 controls the feed water CW after passing through the heat exchanger 10. The first channel switching means 24 is switched so as to return the water to the make-up water tank 4 . As a result, the feed water CW heated by the heat exchanger 10 is returned to the make-up water tank 4 as indicated by an arrow F4 in FIG. Feed water CW circulates in a circulation line including a portion of first water supply line 11 including heat exchanger 10 , reflux line 17 , and make-up water tank 4 . Since the feed water CW that has passed through the heat exchanger 10 is supplied to the make-up water tank 4, the temperature of the feed water CW stored in the make-up water tank 4 rises.

水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５未満に下降した場合、給水制御部５６は、補給水タンク４から送出された給水ＣＷを、熱交換器１０を介して給水タンク２に送給させる。補給水タンク４に貯留されている給水ＣＷは加温されているため、加温された給水ＣＷが熱交換器１０に供給される。これにより、熱交換器１０は、熱源水ライン１３を流通する熱源水ＳＷの流量が少なくても、給水ＣＷを所要温度まで加温することができる。 When the water level value Ls detected by the water level sensor 5 drops below the fifth set water level value Lr5, the water supply control unit 56 transfers the water supply CW sent from the makeup water tank 4 to the water supply tank 2 via the heat exchanger 10. send it. Since the feed water CW stored in the make-up water tank 4 is heated, the heated feed water CW is supplied to the heat exchanger 10 . Thereby, the heat exchanger 10 can heat the feed water CW to the required temperature even if the flow rate of the heat source water SW flowing through the heat source water line 13 is small.

以上説明したように、本実施形態によれば、例えばボイラ８０が給水ＣＷの供給を要求せず、水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５以上の高水位範囲にあり、給水タンク２に対する給水ＣＷの送給を停止する必要がある状態において、熱交換器１０を通過した給水ＣＷは、給水タンク２に供給されずに補給水タンク４に還流される。これにより、熱交換器１０に供給され続けている熱源水ＳＷから熱を回収し続けることができる。したがって、熱源水ＳＷから効率良く熱回収することができる。 As described above, according to the present embodiment, for example, the boiler 80 does not request the supply of the feed water CW, the water level value Ls detected by the water level sensor 5 is in the high water level range of the fifth set water level value Lr5 or more, and the feed water In a state where it is necessary to stop feeding the feed water CW to the tank 2 , the feed water CW that has passed through the heat exchanger 10 is returned to the make-up water tank 4 without being supplied to the feed water tank 2 . Thereby, heat can be continuously recovered from the heat source water SW that is continuously supplied to the heat exchanger 10 . Therefore, heat can be efficiently recovered from the heat source water SW.

なお、本実施形態において、第５設定水位値Ｌｒ５は、第２設定水位値Ｌｒ２とは異なってもよい。 In this embodiment, the fifth set water level value Lr5 may be different from the second set water level value Lr2.

［第４実施形態］
第４実施形態について説明する。以下の説明において、上述の実施形態と同一の構成要素については同一の符号を付し、その説明を簡略又は省略する。 [Fourth Embodiment]
A fourth embodiment will be described. In the following description, the same reference numerals are given to the same constituent elements as in the above-described embodiment, and the description thereof will be simplified or omitted.

図６は、本実施形態に係る給水加温システム１を示す模式図である。上述の実施形態と同様、給水加温システム１は、還流ライン１７と、第１流路切換手段２４とを備える。本実施形態において、給水加温システム１は、熱交換器１０の上流側及び下流側の前記第１給水ライン同士を連通するバイパスライン１８と、給水ＣＷの熱交換器１０への流通と、バイパスライン１８への流通とを切り換える第２流路切換手段２５と、を備える。第２流路切換手段２５は、三方弁を含む。なお、複数の二方弁により第２流路切換手段２５の機能が発揮されてもよい。 FIG. 6 is a schematic diagram showing the water supply heating system 1 according to this embodiment. The feed water heating system 1 includes a reflux line 17 and a first flow path switching means 24, as in the above-described embodiment. In this embodiment, the feed water heating system 1 includes a bypass line 18 that communicates the first feed water lines on the upstream side and the downstream side of the heat exchanger 10, the flow of the feed water CW to the heat exchanger 10, and the bypass line. and a second flow path switching means 25 for switching between the flow and the flow to the line 18 . The second flow path switching means 25 includes a three-way valve. The function of the second flow path switching means 25 may be exhibited by a plurality of two-way valves.

第２流路切換手段２５は、第１給水ライン１１において、上流端１１Ａと熱交換器１０との間に設けられる。図５に示す例において、第２流路切換手段２５は、分岐部１１Ｃと熱交換器１０との間に設けられる。 The second flow path switching means 25 is provided between the upstream end 11A and the heat exchanger 10 in the first water supply line 11 . In the example shown in FIG. 5 , the second flow path switching means 25 is provided between the branch portion 11C and the heat exchanger 10 .

バイパスライン１８の上流端１８Ａは、第２流路切換手段２５に接続される。バイパスライン１８の下流端１８Ｂは、熱交換器１０と還流ライン１７の下流端１７Ｂとの間の第１給水ライン１１に接続される。 An upstream end 18</b>A of the bypass line 18 is connected to the second flow path switching means 25 . A downstream end 18B of the bypass line 18 is connected to the first feed water line 11 between the heat exchanger 10 and a downstream end 17B of the reflux line 17 .

給水制御部５６は、水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５未満の場合、熱交換器１０を通過後の給水ＣＷを給水タンク２に送給するように第１流路切換手段２４を切り換える。給水制御部５６は、水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５以上の場合、熱交換器１０を通過後の給水ＣＷを補給水タンク４に還流させるように第１流路切換手段２４を切り換える。 When the water level value Ls detected by the water level sensor 5 is less than the fifth set water level value Lr5, the water supply control unit 56 switches the first flow path so that the water supply CW that has passed through the heat exchanger 10 is supplied to the water supply tank 2. switch the means 24; When the water level value Ls detected by the water level sensor 5 is equal to or higher than the fifth set water level value Lr5, the water supply control unit 56 switches the first flow path so that the water supply CW that has passed through the heat exchanger 10 is returned to the makeup water tank 4. switch the means 24;

給水制御部５６は、熱交換器１０を通過後の給水ＣＷを補給水タンク４に還流させるように第１流路切換手段２４を切り換え中において、熱源水入口温度センサ７Ａの検出温度値Ｔ３と給水入口温度センサ６Ａの検出温度値Ｔ１との第１差分値Δ１が設定温度値Ｔｍ未満になると、給水ＣＷをバイパスライン１８に流通させるように第２流路切換手段２５を切り換えるとともに、熱源水ライン１３への熱源水ＳＷの流通を停止させる。設定温度値Ｔｍは、例えば５℃である。なお、設定温度値Ｔｍは、５℃でなくてもよく、１℃以上１０℃以下の範囲において任意に設定される。 The water supply controller 56 controls the temperature value T3 detected by the heat source water inlet temperature sensor 7A and the When the first difference value Δ1 between the temperature value T1 detected by the water inlet temperature sensor 6A and the temperature value T1 detected by the water inlet temperature sensor 6A becomes less than the set temperature value Tm, the second flow path switching means 25 is switched so that the water water CW is circulated through the bypass line 18, and the heat source water is switched. Circulation of the heat source water SW to the line 13 is stopped. The set temperature value Tm is, for example, 5°C. Note that the set temperature value Tm does not have to be 5°C, and is arbitrarily set within the range of 1°C or higher and 10°C or lower.

これにより、補給水タンク４から送出された給水ＣＷは、図６の矢印Ｆ５で示すように、熱交換器１０を通過することなく、バイパスライン１８を流通した後、還流ライン１７を介して、補給水タンク４に還流される。給水ＣＷは、熱交換器１０を含まない第１給水ライン１１の一部と、バイパスライン１８と、還流ライン１７と、補給水タンク４とを含む循環ラインにおいて、循環する。 As a result, the feed water CW sent out from the make-up water tank 4 flows through the bypass line 18 without passing through the heat exchanger 10 as indicated by the arrow F5 in FIG. The water is returned to the make-up water tank 4 . Feed water CW circulates in a circulation line including a portion of first water supply line 11 that does not include heat exchanger 10 , bypass line 18 , reflux line 17 , and make-up water tank 4 .

給水制御部５６は、熱交換器１０を通過後の給水ＣＷを補給水タンク４に還流させるように第１流路切換手段２４を切り換え中において、熱源水入口温度センサ７Ａの検出温度値Ｔ３と給水入口温度センサ６Ａの検出温度値Ｔ１との第１差分値Δ１が設定温度値Ｔｍ以上になると、給水ＣＷを熱交換器１０に流通させるように第２流路切換手段２５を切り換えるとともに、熱源水ライン１３に熱源水ＳＷを流通させる。 The water supply controller 56 controls the temperature value T3 detected by the heat source water inlet temperature sensor 7A and the When the first difference value Δ1 from the temperature value T1 detected by the feed water inlet temperature sensor 6A reaches or exceeds the set temperature value Tm, the second flow path switching means 25 is switched so that the feed water CW flows through the heat exchanger 10, and the heat source Heat source water SW is circulated through the water line 13 .

これにより、補給水タンク４から送出された給水ＣＷは、熱交換器１０を通過した後、還流ライン１７を介して、補給水タンク４に還流される。給水ＣＷは、熱交換器１０を含む第１給水ライン１１の一部と、還流ライン１７と、補給水タンク４とを含む循環ラインにおいて、循環する。熱源水ライン１３において熱源水ＳＷが流通しているので、熱交換器１０において給水ＣＷは加温される。熱交換器１０を通過した給水ＣＷが補給水タンク４に供給されるので、補給水タンク４に貯留される給水ＣＷの温度は上昇する。 As a result, the feed water CW sent from the makeup water tank 4 is returned to the makeup water tank 4 through the reflux line 17 after passing through the heat exchanger 10 . Feed water CW circulates in a circulation line including a portion of first water supply line 11 including heat exchanger 10 , reflux line 17 , and make-up water tank 4 . Since the heat source water SW flows through the heat source water line 13 , the feed water CW is heated in the heat exchanger 10 . Since the feed water CW that has passed through the heat exchanger 10 is supplied to the make-up water tank 4, the temperature of the feed water CW stored in the make-up water tank 4 rises.

以上説明したように、本実施形態によれば、水位センサ５の検出水位値Ｌｓが高水位範囲にあり、給水タンク２に対する給水ＣＷの送給を停止する必要がある状態において、第１差分値ΔＴ１が設定温度値Ｔｍ未満の場合、熱源水ＳＷからの熱の回収は実施されない。第１差分値Δ１が設定温度値Ｔｍ未満であることは、熱交換器１０に流入する給水ＣＷが高温となり、熱回収効率が低下していることを意味する。第１差分値ΔＴ１が設定温度値Ｔｍ未満である場合、熱源水制御部５７は、熱源水ポンプ３１を停止して、熱源水ライン１３への熱源水ＳＷの流通を停止させる。熱交換器１０において給水ＣＷを加温する必要が無い場合、熱源水ポンプ３１を駆動させないことにより、熱源水ポンプ３１の消費電力が抑制される。また、熱源水ライン１３の下流端１３Ｂから排出される熱源水ＳＷの量が削減される。 As described above, according to the present embodiment, when the water level value Ls detected by the water level sensor 5 is in the high water level range and the supply of the water supply CW to the water supply tank 2 needs to be stopped, the first difference value When ΔT1 is less than the set temperature value Tm, no heat is recovered from the heat source water SW. The fact that the first difference value Δ1 is less than the set temperature value Tm means that the temperature of the feed water CW flowing into the heat exchanger 10 is high and the heat recovery efficiency is lowered. When the first difference value ΔT1 is less than the set temperature value Tm, the heat source water control unit 57 stops the heat source water pump 31 to stop the circulation of the heat source water SW to the heat source water line 13 . When the heat exchanger 10 does not need to heat the feed water CW, power consumption of the heat source water pump 31 is suppressed by not driving the heat source water pump 31 . Also, the amount of heat source water SW discharged from the downstream end 13B of the heat source water line 13 is reduced.

また、水位センサ５の検出水位値Ｌｓが高水位範囲にあり、給水タンク２に対する給水ＣＷの送給を停止する必要がある状態において、第１差分値ΔＴ１が設定温度値Ｔｍ以上の場合、熱源水ライン１３に熱源水ＳＷが流通され、給水ＣＷは熱交換器１０に供給される。第１差分値ΔＴ１が設定温度値Ｔｍ以上であることは、熱交換器１０に流入する給水ＣＷが低温であり、熱回収効率が良好であることを意味する。第１差分値ΔＴ１が設定温度値Ｔｍ以上である場合、熱源水制御部５７は、熱源水ポンプ３１を駆動して、熱源水ライン１３に熱源水ＳＷを流通させる。熱交換器１０において給水ＣＷを加温できる場合、熱源水ポンプ３１を駆動させることにより、熱交換器１０において十分に加温された給水ＣＷが補給水タンク４に供給される。補給水タンク４に貯留される給水ＣＷの温度が上昇した状態で、水位センサ５の検出水位値Ｌｓが第５設定水位値Ｌｒ５未満に下降した場合、加温された給水ＣＷが熱交換器１０に供給される。これにより、熱交換器１０は、熱源水ライン１３を流通する熱源水ＳＷの流量が少なくても、給水ＣＷを所要温度まで加温することができる。 Further, when the detected water level value Ls of the water level sensor 5 is in the high water level range and the supply of the water supply CW to the water supply tank 2 needs to be stopped, and the first difference value ΔT1 is equal to or higher than the set temperature value Tm, the heat source Heat source water SW is circulated through the water line 13 , and feed water CW is supplied to the heat exchanger 10 . The fact that the first difference value ΔT1 is equal to or higher than the set temperature value Tm means that the feed water CW flowing into the heat exchanger 10 is at a low temperature and the heat recovery efficiency is good. When the first difference value ΔT1 is equal to or higher than the set temperature value Tm, the heat source water controller 57 drives the heat source water pump 31 to circulate the heat source water SW through the heat source water line 13 . When the feed water CW can be heated in the heat exchanger 10 , the feed water CW sufficiently heated in the heat exchanger 10 is supplied to the make-up water tank 4 by driving the heat source water pump 31 . When the water level value Ls detected by the water level sensor 5 drops below the fifth set water level value Lr5 in a state where the temperature of the feed water CW stored in the make-up water tank 4 has risen, the heated feed water CW reaches the heat exchanger 10. supplied to Thereby, the heat exchanger 10 can heat the feed water CW to the required temperature even if the flow rate of the heat source water SW flowing through the heat source water line 13 is small.

［コンピュータシステム］
図７は、コンピュータシステム１０００を示すブロック図である。上述の制御装置５０は、コンピュータシステム１０００を含む。コンピュータシステム１０００は、ＣＰＵ（Central Processing Unit）のようなプロセッサ１００１と、ＲＯＭ（Read Only Memory）のような不揮発性メモリ及びＲＡＭ（Random Access Memory）のような揮発性メモリを含むメインメモリ１００２と、ストレージ１００３と、入出力回路を含むインターフェース１００４とを有する。上述の制御装置５０の機能は、プログラムとしてストレージ１００３に記憶されている。プロセッサ１００１は、プログラムをストレージ１００３から読み出してメインメモリ１００２に展開し、プログラムに従って上述の処理を実行する。なお、プログラムは、ネットワークを介してコンピュータシステム１０００に配信されてもよい。 [Computer system]
FIG. 7 is a block diagram showing computer system 1000 . The controller 50 described above includes a computer system 1000 . A computer system 1000 includes a processor 1001 such as a CPU (Central Processing Unit), a main memory 1002 including non-volatile memory such as ROM (Read Only Memory) and volatile memory such as RAM (Random Access Memory), It has a storage 1003 and an interface 1004 including an input/output circuit. The functions of the control device 50 described above are stored in the storage 1003 as programs. The processor 1001 reads the program from the storage 1003, develops it in the main memory 1002, and executes the above-described processing according to the program. Note that the program may be distributed to computer system 1000 via a network.

［他の実施形態］
なお、上述の実施形態においては、第２給水ライン１２の上流端１２Ａが熱交換器１０の上流側の第１給水ライン１１に接続され、第２給水ライン１２の下流端１２Ｂが熱交換器１０の下流側の第１給水ライン１１に合流することとした。第２給水ライン１２の上流端１２Ａが補給水タンク４に接続され、第２給水ライン１２の下流端１２Ｂが給水タンク２に接続されてもよい。 [Other embodiments]
In the above-described embodiment, the upstream end 12A of the second water supply line 12 is connected to the first water supply line 11 on the upstream side of the heat exchanger 10, and the downstream end 12B of the second water supply line 12 is connected to the heat exchanger 10. We decided to join the first water supply line 11 on the downstream side of the. The upstream end 12A of the second water supply line 12 may be connected to the makeup water tank 4 and the downstream end 12B of the second water supply line 12 may be connected to the water supply tank 2 .

１…給水加温システム、２…給水タンク、３…熱源水タンク、４…補給水タンク、５…水位センサ、６Ａ…給水入口温度センサ、６Ｂ…給水出口温度センサ、７Ａ…熱源水入口温度センサ、７Ｂ…熱源水出口温度センサ、８…給水流量センサ、９…熱源水流量センサ、１０…熱交換器、１１…第１給水ライン、１１Ａ…上流端、１１Ｂ…下流端、１１Ｃ…分岐部、１１Ｄ…合流部、１２…第２給水ライン、１２Ａ…上流端、１２Ｂ…下流端、１３…熱源水ライン、１３Ａ…上流端、１３Ｂ…下流端、１４…原水ライン、１５…供給ライン、１６…オーバーフロー路、１７…還流ライン、１７Ａ…上流端、１７Ｂ…下流端、１８…バイパスライン、１８Ａ…上流端、１８Ｂ…下流端、２０…給水状態切換手段、２０Ａ…給水流量調節手段、２１…給水ポンプ、２１Ｂ…給水ポンプ、２２…第１給水弁、２３…インバータ（第１インバータ）、２４…第１流路切換手段、２５…第２流路切換手段、３０…熱源水流量調節手段、３１…熱源水ポンプ、３１Ｂ…熱源水ポンプ、３２…インバータ（第２インバータ）、３３…熱源水弁、４１…第２給水弁、４２…水処理装置、５０…制御装置、５１…検出水位値取得部、５２…検出温度値取得部、５３…検出流量値取得部、５４…差分値算出部、５５…記憶部、５６…給水制御部、５７…熱源水制御部、５８…判定出力部、６０…出力装置、８０…ボイラ、８１…温水ライン、８２…温水ポンプ、ＣＷ…給水、ＦＭ１…検出流量値、ＦＭ２…検出流量値、Ｌｓ…検出水位値、ＳＷ…熱源水、Ｔ１…検出温度値、Ｔ２…検出温度値、Ｔ３…検出温度値、Ｔ４…検出温度値。 DESCRIPTION OF SYMBOLS 1... Feed water heating system, 2... Feed water tank, 3... Heat source water tank, 4... Make-up water tank, 5... Water level sensor, 6A... Feed water inlet temperature sensor, 6B... Feed water outlet temperature sensor, 7A... Heat source water inlet temperature sensor , 7B... heat source water outlet temperature sensor, 8... feed water flow rate sensor, 9... heat source water flow rate sensor, 10... heat exchanger, 11... first water supply line, 11A... upstream end, 11B... downstream end, 11C... branch portion, 11D... confluence portion 12... second water supply line 12A... upstream end 12B... downstream end 13... heat source water line 13A... upstream end 13B... downstream end 14... raw water line 15... supply line 16... Overflow path 17 Circulation line 17A Upstream end 17B Downstream end 18 Bypass line 18A Upstream end 18B Downstream end 20 Water supply state switching means 20A Water supply flow rate adjusting means 21 Water supply Pump 21B... Water supply pump 22... First water supply valve 23... Inverter (first inverter) 24... First channel switching means 25... Second channel switching means 30... Heat source water flow rate adjusting means 31 ... Heat source water pump 31B ... Heat source water pump 32 ... Inverter (second inverter) 33 ... Heat source water valve 41 ... Second water supply valve 42 ... Water treatment device 50 ... Control device 51 ... Detected water level value acquisition Part 52... Detected temperature value acquisition part 53... Detected flow value acquisition part 54... Difference value calculation part 55... Storage part 56... Water supply control part 57... Heat source water control part 58... Judgment output part 60 Output device 80 Boiler 81 Hot water line 82 Hot water pump CW Water supply FM1 Detected flow rate value FM2 Detected flow rate value Ls Detected water level value SW Heat source water T1 Detected temperature value , T2...Detected temperature value, T3...Detected temperature value, T4...Detected temperature value.

Claims (8)

給水を貯留する給水タンクと、
熱源水を貯留する熱源水タンクと、
給水を前記給水タンクに送給する第１給水ラインと、
熱源水を前記熱源水タンクから送出する熱源水ラインと、
前記熱源水ラインを流通する熱源水との熱交換により、前記第１給水ラインを流通する給水を加熱する熱交換器と、
前記給水タンクの水位を検出する水位検出手段と、
前記第１給水ラインに設けられ、前記給水タンクへの給水状態を切り換える給水状態切換手段と、
前記水位検出手段の検出水位値に基づいて、前記給水状態切換手段を制御する制御手段と、を備え、
前記給水状態切換手段は、前記給水タンクへの給水流量を調節可能な給水流量調節手段として構成されており、
前記制御手段は、
前記水位検出手段の検出水位値が第１設定水位値以下の場合、給水流量が所要流量になるように前記給水流量調節手段を制御し、
前記検出水位値が前記第１設定水位値よりも高い第２設定水位値以上の場合、給水流量がゼロになるように前記給水流量調節手段を制御し、
前記検出水位値が前記第１設定水位値超過且つ前記第２設定水位値未満の範囲にある場合、前記検出水位値の上昇に伴って給水流量が前記所要流量からゼロに向かって段階的に減少されるように前記給水流量調節手段を制御する、
給水加温システム。 a water supply tank for storing water supply;
a heat source water tank for storing heat source water;
a first water supply line for supplying water to the water supply tank;
a heat source water line for delivering heat source water from the heat source water tank;
a heat exchanger that heats feed water flowing through the first feed water line by heat exchange with heat source water flowing through the heat source water line;
a water level detection means for detecting the water level of the water supply tank;
a water supply state switching means provided in the first water supply line for switching a state of water supply to the water supply tank;
a control means for controlling the water supply state switching means based on the water level value detected by the water level detection means ;
The water supply state switching means is configured as water supply flow rate adjusting means capable of adjusting the water supply flow rate to the water supply tank,
The control means is
when the detected water level value of the water level detection means is equal to or lower than the first set water level value, controlling the water supply flow rate adjusting means so that the water supply flow rate becomes the required flow rate;
when the detected water level value is equal to or higher than a second set water level value higher than the first set water level value, controlling the water supply flow rate adjusting means so that the water supply flow rate becomes zero;
When the detected water level value is in the range of exceeding the first set water level value and less than the second set water level value, the water supply flow rate gradually decreases from the required flow rate to zero as the detected water level value increases. controlling the water supply flow rate adjustment means so that
Water heating system. 前記給水流量調節手段は、
前記熱交換器の上流側の前記第１給水ラインに設けられ、予め設定された駆動周波数に応じた回転速度で駆動される給水ポンプと、
前記給水ポンプの吐出側又は吸込側に設けられ、入力された開度指定信号に対応する開度で作動される第１給水弁と、を有し、
前記制御手段は、前記検出水位値に基づいて、前記第１給水弁に出力する前記開度指定信号を決定する、
請求項１に記載の給水加温システム。 The water supply flow rate adjusting means is
a water supply pump provided in the first water supply line on the upstream side of the heat exchanger and driven at a rotational speed corresponding to a preset drive frequency;
a first water supply valve provided on the discharge side or the suction side of the water supply pump and operated at an opening corresponding to an input opening designation signal;
The control means determines the opening designation signal to be output to the first water supply valve based on the detected water level value.
The feed water heating system according to claim 1 . 前記給水流量調節手段は、
前記熱交換器の上流側の前記第１給水ラインに設けられ、入力された駆動周波数に応じた回転速度で駆動される給水ポンプと、
入力された周波数指定信号に対応する駆動周波数を前記給水ポンプに出力する第１インバータと、を有し、
前記制御手段は、前記検出水位値に基づいて、前記第１インバータに出力する周波数指定信号を決定する、
請求項１に記載の給水加温システム。 The water supply flow rate adjusting means is
a water supply pump provided in the first water supply line on the upstream side of the heat exchanger and driven at a rotational speed corresponding to the input drive frequency;
a first inverter that outputs a drive frequency corresponding to the input frequency designation signal to the water supply pump;
The control means determines a frequency designation signal to be output to the first inverter based on the detected water level value.
The feed water heating system according to claim 1 . 前記熱交換器を介さずに給水を前記給水タンクに送給する第２給水ラインと、
前記第２給水ラインに設けられた第２給水弁と、を備え、
前記制御手段は、
前記検出水位値が前記第１設定水位値よりも低い第３設定水位値以下になると前記第２給水弁を開放し、
前記検出水位値が前記第３設定水位値よりも高く且つ前記第２設定水位値よりも低い第４設定水位値以上になると前記第２給水弁を閉鎖する、
請求項１から請求項３のいずれか一項に記載の給水加温システム。 a second water supply line that supplies water to the water supply tank without passing through the heat exchanger;
a second water supply valve provided in the second water supply line,
The control means is
opening the second water supply valve when the detected water level value becomes equal to or lower than a third set water level value lower than the first set water level value;
closing the second water supply valve when the detected water level value reaches a fourth set water level value higher than the third set water level value and lower than the second set water level value;
The feed water heating system according to any one of claims 1 to 3 . 給水を貯留する給水タンクと、
熱源水を貯留する熱源水タンクと、
給水を前記給水タンクに送給する第１給水ラインと、
熱源水を前記熱源水タンクから送出する熱源水ラインと、
前記熱源水ラインを流通する熱源水との熱交換により、前記第１給水ラインを流通する給水を加熱する熱交換器と、
前記給水タンクの水位を検出する水位検出手段と、
前記第１給水ラインに設けられ、前記給水タンクへの給水状態を切り換える給水状態切換手段と、
前記水位検出手段の検出水位値に基づいて、前記給水状態切換手段を制御する制御手段と、
前記第１給水ラインの上流端に接続された補給水タンクと、を備え、
前記給水状態切換手段は、前記熱交換器の下流側の前記第１給水ラインから分岐し、前記熱交換器を通過後の給水を前記補給水タンクに還流させる還流ラインと、
給水の前記給水タンクへの送給と、前記補給水タンクへの還流とを切り換える第１流路切換手段と、を有して構成され、
前記制御手段は、
前記水位検出手段の検出水位値が第５設定水位値未満の場合、前記熱交換器を通過後の給水を前記給水タンクに送給するように前記第１流路切換手段を切り換え、
前記検出水位値が第５設定水位値以上の場合、前記熱交換器を通過後の給水を前記補給水タンクに還流させるように前記第１流路切換手段を切り換える、
給水加温システム。 a water supply tank for storing water supply;
a heat source water tank for storing heat source water;
a first water supply line for supplying water to the water supply tank;
a heat source water line for delivering heat source water from the heat source water tank;
a heat exchanger that heats feed water flowing through the first feed water line by heat exchange with heat source water flowing through the heat source water line;
a water level detection means for detecting the water level of the water supply tank;
a water supply state switching means provided in the first water supply line for switching a state of water supply to the water supply tank;
a control means for controlling the water supply state switching means based on the water level value detected by the water level detection means;
a make-up water tank connected to the upstream end of the first water supply line ;
The feed water state switching means is a reflux line branched from the first feed water line on the downstream side of the heat exchanger and returning the feed water after passing through the heat exchanger to the make-up water tank;
a first flow path switching means for switching between supply of water supply to the water supply tank and circulation of the supply water to the make-up water tank;
The control means is
when the detected water level value of the water level detection means is less than a fifth set water level value, switching the first flow path switching means so as to supply the water supply after passing through the heat exchanger to the water supply tank;
when the detected water level value is equal to or higher than a fifth set water level value, the first flow path switching means is switched so that the water supply after passing through the heat exchanger is returned to the makeup water tank;
Water heating system. 前記熱交換器に流入する熱源水の入口温度を検出する熱源水入口温度検出手段と、
前記熱交換器に流入する給水の入口温度を検出する給水入口温度検出手段と、
前記熱交換器の上流側及び下流側の前記第１給水ライン同士を連通するバイパスラインと、
給水の前記熱交換器への流通と、前記バイパスラインへの流通とを切り換える第２流路切換手段と、を備え、
前記制御手段は、前記熱交換器を通過後の給水を前記補給水タンクに還流させるように前記第１流路切換手段を切り換え中、
前記熱源水入口温度検出手段の検出温度値と前記給水入口温度検出手段の検出温度値との第１差分値が設定温度値未満になると、給水を前記バイパスラインに流通させるように前記第２流路切換手段を切り換えるとともに、前記熱源水ラインへの熱源水の流通を停止させ、
前記第１差分値が前記設定温度値以上になると、給水を前記熱交換器に流通させるように前記第２流路切換手段を切り換えるとともに、前記熱源水ラインに熱源水を流通させる、
請求項５に記載の給水加温システム。 heat source water inlet temperature detection means for detecting the inlet temperature of the heat source water flowing into the heat exchanger;
feed water inlet temperature detection means for detecting the inlet temperature of feed water flowing into the heat exchanger;
a bypass line communicating between the first water supply lines on the upstream side and the downstream side of the heat exchanger;
A second flow path switching means for switching between the flow of feed water to the heat exchanger and the flow to the bypass line,
While the control means is switching the first flow path switching means so that the water supply after passing through the heat exchanger is recirculated to the make-up water tank,
When a first difference value between the temperature value detected by the heat source water inlet temperature detection means and the temperature value detected by the water supply inlet temperature detection means becomes less than a set temperature value, the second flow is configured to circulate the water supply through the bypass line. Switching the path switching means and stopping the flow of the heat source water to the heat source water line;
When the first difference value becomes equal to or higher than the set temperature value, the second flow path switching means is switched so as to circulate feed water to the heat exchanger, and the heat source water is circulated through the heat source water line.
The feed water heating system according to claim 5 . 給水を貯留する給水タンクと、
熱源水を貯留する熱源水タンクと、
給水を前記給水タンクに送給する第１給水ラインと、
熱源水を前記熱源水タンクから送出する熱源水ラインと、
前記熱源水ラインを流通する熱源水との熱交換により、前記第１給水ラインを流通する給水を加熱する熱交換器と、
前記給水タンクの水位を検出する水位検出手段と、
前記第１給水ラインに設けられ、前記給水タンクへの給水状態を切り換える給水状態切換手段と、
前記水位検出手段の検出水位値に基づいて、前記給水状態切換手段を制御する制御手段と、
前記熱源水ラインを流通する熱源水の流量を調節する熱源水流量調節手段と、
前記熱交換器に流入する熱源水の入口温度を検出する熱源水入口温度検出手段と、
前記熱交換器から流出する給水の出口温度を検出する給水出口温度検出手段と、を備え、
前記制御手段は、前記熱交換器に給水を通水中、前記熱源水入口温度検出手段の検出温度値と前記給水出口温度検出手段の検出温度値との第２差分値が予め設定された目標温度値となるように前記熱源水流量調節手段を制御する、
給水加温システム。 a water supply tank for storing water supply;
a heat source water tank for storing heat source water;
a first water supply line for supplying water to the water supply tank;
a heat source water line for delivering heat source water from the heat source water tank;
a heat exchanger that heats feed water flowing through the first feed water line by heat exchange with heat source water flowing through the heat source water line;
a water level detection means for detecting the water level of the water supply tank;
a water supply state switching means provided in the first water supply line for switching a state of water supply to the water supply tank;
a control means for controlling the water supply state switching means based on the water level value detected by the water level detection means;
heat source water flow rate adjusting means for adjusting the flow rate of heat source water flowing through the heat source water line;
heat source water inlet temperature detection means for detecting the inlet temperature of the heat source water flowing into the heat exchanger;
a feed water outlet temperature detecting means for detecting the outlet temperature of the feed water flowing out of the heat exchanger ;
The control means controls a target temperature in which a second difference value between a temperature value detected by the heat source water inlet temperature detection means and a temperature value detected by the water supply outlet temperature detection means is set in advance while water is being supplied to the heat exchanger. controlling the heat source water flow rate adjusting means so that the value
Water heating system. 前記熱源水流量調節手段は、
前記熱交換器の上流側の前記熱源水ラインに設けられ、入力された駆動周波数に応じた回転速度で駆動される熱源水ポンプと、
入力された周波数指定信号に対応する駆動周波数を前記熱源水ポンプに出力する第２インバータと、を有し、
前記制御手段は、前記第２差分値が前記目標温度値となるように前記熱源水ポンプの駆動周波数を演算し、前記駆動周波数の演算値に対応する周波数指定信号を前記第２インバータに出力する、
請求項７に記載の給水加温システム。 The heat source water flow rate adjusting means is
a heat source water pump provided in the heat source water line on the upstream side of the heat exchanger and driven at a rotational speed corresponding to the input driving frequency;
a second inverter that outputs a drive frequency corresponding to the input frequency designation signal to the heat source water pump;
The control means calculates the drive frequency of the heat source water pump so that the second difference value becomes the target temperature value, and outputs a frequency designation signal corresponding to the calculated value of the drive frequency to the second inverter. ,
The feed water heating system according to claim 7 .
JP2018180977A 2018-09-26 2018-09-26 Water heating system Active JP7172366B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018180977A JP7172366B2 (en) 2018-09-26 2018-09-26 Water heating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018180977A JP7172366B2 (en) 2018-09-26 2018-09-26 Water heating system

Publications (2)

Publication Number Publication Date
JP2020051678A JP2020051678A (en) 2020-04-02
JP7172366B2 true JP7172366B2 (en) 2022-11-16

Family

ID=69996557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018180977A Active JP7172366B2 (en) 2018-09-26 2018-09-26 Water heating system

Country Status (1)

Country Link
JP (1) JP7172366B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014095497A (en) 2012-11-08 2014-05-22 Miura Co Ltd Boiler water supply heating system
JP2017146032A (en) 2016-02-18 2017-08-24 三浦工業株式会社 Feedwater heating system
JP2017203574A (en) 2016-05-10 2017-11-16 三浦工業株式会社 Heat recovery system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014095497A (en) 2012-11-08 2014-05-22 Miura Co Ltd Boiler water supply heating system
JP2017146032A (en) 2016-02-18 2017-08-24 三浦工業株式会社 Feedwater heating system
JP2017203574A (en) 2016-05-10 2017-11-16 三浦工業株式会社 Heat recovery system

Also Published As

Publication number Publication date
JP2020051678A (en) 2020-04-02

Similar Documents

Publication Publication Date Title
JP2007327725A (en) Heat pump type water heater
JP2010091181A (en) Storage water heater and heat pump water heater
US20160010890A1 (en) Heat pump water heating system
JP5067869B2 (en) Water heater
JP7172366B2 (en) Water heating system
KR101021983B1 (en) Apparatus and method for supplying chemical
JP7340283B2 (en) Methods, systems, programs and devices of hot water supply
US11796247B2 (en) Temperature control system
JP6948012B2 (en) Ultrapure water heating method
KR101541716B1 (en) boiler system for electrode type
JP4869965B2 (en) Substrate processing method and substrate processing apparatus
KR102212854B1 (en) Heat transfer midium circulation system and method for providing heat source to the fresh water generator
JP2007327727A (en) Heat pump water heater
JP2016191493A (en) Storage water heater
JP2010131953A (en) Mold temperature controller
KR20150121450A (en) Temperature control system for molds
JP2018159311A (en) Fuel oil transfer system
JP6889628B2 (en) Pure water production equipment and pure water production method
JP6451958B2 (en) Fuel oil transfer system
WO2016050684A1 (en) Laundry-care appliance comprising a heating element
JP6060025B2 (en) Bath water heater
JP2009018836A (en) Apparatus and method for heat treating container contents
TWI839582B (en) Temperature control system
JP2010101527A (en) Storage type water heater
KR102398341B1 (en) Liquid heating devices and cleaning systems

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210621

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220712

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20220908

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20221004

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20221017

R150 Certificate of patent or registration of utility model

Ref document number: 7172366

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150