JP2563703B2 - Subcooled ice heat storage device - Google Patents
Subcooled ice heat storage deviceInfo
- Publication number
- JP2563703B2 JP2563703B2 JP3279898A JP27989891A JP2563703B2 JP 2563703 B2 JP2563703 B2 JP 2563703B2 JP 3279898 A JP3279898 A JP 3279898A JP 27989891 A JP27989891 A JP 27989891A JP 2563703 B2 JP2563703 B2 JP 2563703B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- cold water
- storage tank
- heat
- ice
- 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.)
- Expired - Fee Related
Links
Landscapes
- Other Air-Conditioning Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空調用氷蓄熱装置や地
域冷房用氷蓄熱システムに適用される過冷却製氷蓄熱装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supercooled ice heat storage device applied to an ice heat storage device for air conditioning and an ice heat storage system for district cooling.
【０００２】[0002]
【従来の技術】従来より空調用氷蓄熱装置や地域冷房用
氷蓄熱システムに適用されていた過冷却製氷蓄熱装置の
構成を図２に例示する。同図で１は蓄熱槽であり、この
蓄熱槽１内の冷水が冷水ポンプ２によって吸引され、フ
ィルタ３内を通った後に過冷却器４のチューブ側を通り
ながら冷却される。この冷却は過冷却冷凍機の蒸発器に
相当する過冷却となっているため、冷媒が圧縮機６、凝
縮器７及び膨脹弁８を通った後に減圧されて送り込ま
れ、その冷媒の気化熱によって吸熱されることで冷水が
冷却されるようになる。2. Description of the Related Art FIG. 2 illustrates the configuration of a supercooled ice making heat storage device which has been conventionally applied to an ice heat storage device for air conditioning and an ice heat storage system for district cooling. In the figure, reference numeral 1 denotes a heat storage tank, in which cold water in the heat storage tank 1 is sucked by a cold water pump 2, passed through a filter 3, and then cooled while passing through a tube side of a subcooler 4. Since this cooling is supercooling corresponding to the evaporator of the subcooling refrigerator, the refrigerant is depressurized and sent after passing through the compressor 6, the condenser 7, and the expansion valve 8, and the heat of vaporization of the refrigerant causes the refrigerant to cool. The cold water is cooled by absorbing the heat.
【０００３】冷水は、製氷時にはこの過冷却器４で氷点
以下の過冷却状態となり、蓄熱槽１上部に設置された放
出部９よりノズルまたはトレイを介して放出される。し
かして、過冷却された冷水は、この放出の際の流速の変
化、衝撃等により過冷却状態が解除され、氷を生成しな
がら蓄熱槽１に蓄えられていく。During ice making, the cold water is supercooled below the freezing point by the supercooler 4 and is discharged from a discharging section 9 installed above the heat storage tank 1 through a nozzle or a tray. Then, the supercooled cold water is released from the supercooled state due to a change in the flow velocity at the time of this discharge, impact, etc., and is stored in the heat storage tank 1 while generating ice.
【０００４】放冷時に蓄熱槽１内の冷水は、蓄熱槽１の
内部に配置された配管等の吸引部１０を介して放冷ポン
プ１１により負荷熱交換器１２に送出され、温度上昇を
した後に放出部９より蓄熱槽１に放出される。During cooling, the cold water in the heat storage tank 1 is sent to the load heat exchanger 12 by the cooling pump 11 via the suction section 10 such as a pipe arranged inside the heat storage tank 1 to raise the temperature. After that, the heat is discharged from the discharging unit 9 to the heat storage tank 1.
【０００５】このとき、冷水は通常氷点以上となってお
り、蓄熱槽１の内部、特に上部にたまることの多い氷を
加熱して融解しつつ、冷水自身は放熱により温度を下げ
ることとなる。蓄熱槽１内の氷が完全に融解され、潜熱
熱交換がなくなった後は、蓄熱槽１内の温度上昇、すな
わち顕熱熱交換によって、外部負荷に対応する。At this time, the cold water is usually above the freezing point, and while the ice that often accumulates inside the heat storage tank 1, especially the upper part, is heated and melted, the cold water itself lowers the temperature by radiating heat. After the ice in the heat storage tank 1 is completely melted and the latent heat exchange is lost, the temperature inside the heat storage tank 1 is increased, that is, sensible heat exchange is performed to cope with the external load.
【０００６】一方、製氷時に蓄熱槽１内の温度は、過冷
却冷凍機５によって冷水を循環させることで下げていく
が、氷が生成され始めると蓄熱槽１内の温度は通常氷点
となる。したがって、冷水ポンプ２によって吸引される
冷水も氷点付近の温度となることが多く、冷水中に微細
な氷晶が混入することで過冷却器４より下流側の系統で
の冷水の過冷却が解除され、結氷することが多い。On the other hand, during ice making, the temperature in the heat storage tank 1 is lowered by circulating cold water by the subcooling refrigerator 5. However, when ice starts to be generated, the temperature in the heat storage tank 1 usually reaches the freezing point. Therefore, the cold water sucked by the cold water pump 2 often has a temperature near the freezing point, and fine ice crystals are mixed in the cold water to release the supercooling of the cold water in the system downstream of the supercooler 4. And often freezes.
【０００７】そのため、過冷却冷凍機５の入口部には予
め予熱熱交換器１３を設置し、ここを通過する冷水の温
度が氷点より若干高めとなって該氷晶が融解されるよう
に加熱制御する。なお、この時の予熱熱交換器１３の加
熱源には、冷却塔の冷却水を使用する。Therefore, a preheat heat exchanger 13 is installed in advance at the inlet of the subcooling refrigerator 5, and the temperature of the cold water passing therethrough is slightly raised above the freezing point so that the ice crystals are melted. Control. The cooling water of the cooling tower is used as the heating source of the preheat heat exchanger 13 at this time.
【０００８】また、過冷却器４の出口側の冷水系統にも
同様に冷水出口熱交換器１４を設置し、この系統の温度
変化（すなわち過冷却の解除）または圧力変化（すなわ
ち圧力の増加）を検知し、系統内での結氷または氷の生
成を検出して冷水温度が氷点以上になるように加熱制御
することで、系内の氷を融解することができる。A cold water outlet heat exchanger 14 is also installed in the cold water system on the outlet side of the subcooler 4, and the temperature change (that is, the supercooling is released) or the pressure change (that is, the pressure is increased) in this system. Is detected, ice formation or ice formation in the system is detected, and heating control is performed so that the cold water temperature is equal to or higher than the freezing point, whereby the ice in the system can be melted.
【０００９】[0009]
【発明が解決しようとする課題】上記のような構成にあ
って、冷水中の氷晶を融解するための予熱熱交換器１３
及び冷水出口熱交換器１４の加熱源には冷却水を使用し
ているため、氷を融解するための外部からの入熱が有効
に使用されることなく、装置としての熱ロスとなる。ま
た、この部分に電気ヒータ等の外部加熱手段を設置して
同様の作用を行なわせることも考えられるが、加熱源と
しての電力が必要となり、装置全体としての動作効率が
低下することとなる。With the above structure, the preheat heat exchanger 13 for melting the ice crystals in the cold water.
Also, since the cooling water is used as the heat source of the cold water outlet heat exchanger 14, heat input from the outside for melting the ice is not effectively used, resulting in heat loss as a device. Further, it is conceivable to install an external heating means such as an electric heater in this portion to perform the same operation, but this requires electric power as a heating source, and the operation efficiency of the entire apparatus is reduced.
【００１０】本発明は上記のような実情に鑑みてなされ
たもので、その目的とするところは、装置の効率を低下
させることなく製氷時の連続運転と他の蓄熱槽の低温化
を計ることが可能な過冷却製氷蓄熱装置を提供すること
にある。The present invention has been made in view of the above circumstances, and an object thereof is to measure continuous operation during ice making and lower temperature of other heat storage tanks without lowering the efficiency of the apparatus. It is an object of the present invention to provide a supercooled ice-making heat storage device capable of performing the above.
【００１１】[0011]
【課題を解決するための手段及び作用】すなわち本発明
は、複数の蓄熱槽を備え、同蓄熱槽内の冷水を過冷却器
に循環させて過冷却状態とし、この状態に変化を与える
ことにより過冷却状態を解除して製氷し、蓄熱槽内に蓄
熱する過冷却製氷蓄熱装置において、上記過冷却器を循
環させる冷水回路中に、他の蓄熱槽の温度の高い冷水が
循環され、該冷水回路中の冷水を加熱する熱交換器を設
けるようにしたもので、外部からの入熱を必要とせずに
製氷時の他の蓄熱槽の氷点以上の顕熱を利用して冷水回
路中の冷水を加熱するために装置の効率を低下させるこ
となく製氷時の連続運転と他の蓄熱槽の低温化を計るこ
とができる。That is, the present invention is provided with a plurality of heat storage tanks, and the cold water in the heat storage tanks is circulated to a subcooler to be in a supercooled state, and by changing this state. In the supercooled ice storage device that releases the supercooled state to make ice and stores heat in the heat storage tank, in the cold water circuit that circulates the supercooler, high temperature cold water in another heat storage tank is circulated, and the cold water is cooled. A heat exchanger that heats the cold water in the circuit is provided, and the sensible heat above the freezing point of the other heat storage tank during ice making is used without the need for heat input from the outside, and the cold water in the cold water circuit is used. It is possible to measure continuous operation during ice making and to lower the temperature of other heat storage tanks without lowering the efficiency of the device for heating.
【００１２】[0012]
【実施例】以下図面を参照して本発明の一実施例を説明
する。An embodiment of the present invention will be described below with reference to the drawings.
【００１３】図１は過冷却製氷蓄熱装置全体の構成を示
すもので、基本的な構成は上記図２に示したものとほぼ
同様であるので、同一部分には同一符号を付してその説
明は省略する。FIG. 1 shows the entire structure of the supercooled ice making heat storage device. Since the basic structure is almost the same as that shown in FIG. 2, the same parts are designated by the same reference numerals and their description is omitted. Is omitted.
【００１４】同図で、１５は上記蓄熱槽１と同様構造の
第２の蓄熱槽であり、この第２の蓄熱槽１５内の冷水が
配管２１、弁１６を介して予熱熱交換器１３へ、また、
配管２１、弁１７を介して冷水出口熱交換器１４へ供給
された後にそれぞれ放出部１８より第２の蓄熱槽１５内
に戻される。また、ここでは示さないが、さらに他の蓄
熱槽からの冷水も弁１９を介して予熱熱交換器１３へ、
弁２０を介して冷水出口熱交換器１４へ供給された後に
それぞれ元の蓄熱槽内に戻される。In the figure, 15 is a second heat storage tank having the same structure as the heat storage tank 1, and the cold water in the second heat storage tank 15 is transferred to the preheat heat exchanger 13 via the pipe 21 and the valve 16. ,Also,
After being supplied to the cold water outlet heat exchanger 14 via the pipe 21 and the valve 17, they are returned from the discharge part 18 into the second heat storage tank 15. Although not shown here, cold water from another heat storage tank is also passed through the valve 19 to the preheat heat exchanger 13.
After being supplied to the cold water outlet heat exchanger 14 via the valve 20, they are returned to their original heat storage tanks.
【００１５】上記のような構成にあって、通常放冷を終
了して製氷過程に入る場合には、通常蓄熱槽１内は氷点
以上の温度となっている。したがって、蓄熱槽１内に氷
を貯めていく際には、冷水予熱や凍結解除用の熱源とし
てこの蓄熱槽１内の冷水より温度の高い第２の蓄熱槽１
５からの冷水を使用しながら製氷を行なう。In the above structure, when the normal cooling is finished and the ice making process is started, the temperature in the heat storage tank 1 is usually above the freezing point. Therefore, when the ice is stored in the heat storage tank 1, the second heat storage tank 1 having a temperature higher than that of the cold water in the heat storage tank 1 is used as a heat source for preheating cold water and freezing release.
Make ice using cold water from 5.
【００１６】すなわち、上記弁１６，１７を共に開とす
ることで第２の蓄熱槽１５内の冷水を予熱熱交換器１
３、冷水出口熱交換器１４に供給し、ここを通過する蓄
熱槽１からの冷水を加熱させるものである。That is, by opening both the valves 16 and 17, the cold water in the second heat storage tank 15 is preheated to the heat exchanger 1.
3. The cold water is supplied to the cold water outlet heat exchanger 14, and the cold water from the heat storage tank 1 passing therethrough is heated.
【００１７】第２の蓄熱槽１５からの冷水自体は、この
予熱熱交換器１３、冷水出口熱交換器１４で放熱するこ
とで温度が低下し、再び第２の蓄熱槽１５に戻される。
そのため、第２の蓄熱槽１５内の冷水は順次その温度が
低下していく。The cold water itself from the second heat storage tank 15 is radiated by the preheat heat exchanger 13 and the cold water outlet heat exchanger 14 to lower the temperature, and is returned to the second heat storage tank 15 again.
Therefore, the temperature of the cold water in the second heat storage tank 15 gradually decreases.
【００１８】第２の蓄熱槽１５内の冷水の温度が氷点以
下となって蓄熱槽１内の冷水の温度より低下した場合、
それ以上の供給は無意味であるので、弁１６，１７を閉
とし、代えて弁１９，２０を開として他の蓄熱槽からの
氷点以上の温度の冷水を予熱熱交換器１３、冷水出口熱
交換器１４へ加熱源として供給するようにする。なお、
上記図１では示さなかったが、この蓄熱槽１内の冷水を
もって第２の蓄熱槽１５、その他の蓄熱槽での製氷時の
熱源とすることは勿論である。When the temperature of the cold water in the second heat storage tank 15 falls below the freezing point and becomes lower than the temperature of the cold water in the heat storage tank 1,
Since further supply is meaningless, the valves 16 and 17 are closed, and instead the valves 19 and 20 are opened to supply the cold water from the other heat storage tanks having a temperature equal to or higher than the freezing point to the preheat heat exchanger 13 and the cold water outlet heat. The heat is supplied to the exchanger 14 as a heat source. In addition,
Although not shown in FIG. 1, it is needless to say that the cold water in the heat storage tank 1 is used as the heat source for ice making in the second heat storage tank 15 and other heat storage tanks.
【００１９】[0019]
【発明の効果】以上に述べた如く本発明によれば、複数
の蓄熱槽を備え、同蓄熱槽内の冷水を過冷却器に循環さ
せて過冷却状態とし、この状態に変化を与えることによ
り過冷却状態を解除して製氷し、蓄熱槽内に蓄熱する過
冷却製氷蓄熱装置において、上記過冷却器を循環させる
冷水回路中に、他の蓄熱槽の温度の高い冷水が循環さ
れ、該冷水回路中の冷水を加熱する熱交換器を設けるよ
うにしたので、外部からの入熱を必要とせずに製氷時の
他の蓄熱槽の氷点以上の顕熱を利用して冷水回路中の冷
水を加熱するために装置の効率を低下させることなく製
氷時の連続運転と他の蓄熱槽の低温化を計ることが可能
な過冷却製氷蓄熱装置を提供することができる。As described above, according to the present invention, a plurality of heat storage tanks are provided, and cold water in the heat storage tanks is circulated to a supercooler to be in a supercooled state, and by changing this state. In the supercooled ice storage device that releases the supercooled state to make ice and stores heat in the heat storage tank, in the cold water circuit that circulates the supercooler, high temperature cold water in another heat storage tank is circulated, and the cold water is cooled. Since a heat exchanger for heating the cold water in the circuit is provided, the sensible heat above the freezing point of the other heat storage tank during ice making is used to remove the cold water in the cold water circuit without the need for heat input from the outside. It is possible to provide a supercooled ice making heat storage device capable of performing continuous operation during ice making and lowering the temperature of other heat storage tanks without lowering the efficiency of the device for heating.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例に係る装置全体の構成を示す
図。FIG. 1 is a diagram showing a configuration of an entire apparatus according to an embodiment of the present invention.
【図２】従来の過冷却製氷蓄熱装置の構成を示す図。FIG. 2 is a diagram showing a configuration of a conventional supercooled ice making heat storage device.
１…蓄熱槽、２…冷水ポンプ、３…フィルタ、４…過冷
却器、５…過冷却冷凍機、６…圧縮機、７…凝縮器、８
…膨脹弁、９…放出部、１０…吸引部、１１…放冷ポン
プ、１２…負荷熱交換器、１３…予熱熱交換器、１４…
冷水出口熱交換器、１５…第２の蓄熱槽、１６，１７，
１９，２０…弁、１８…放出部、２１…配管。1 ... Heat storage tank, 2 ... Cold water pump, 3 ... Filter, 4 ... Supercooler, 5 ... Supercooling refrigerator, 6 ... Compressor, 7 ... Condenser, 8
... expansion valve, 9 ... discharge part, 10 ... suction part, 11 ... cooling pump, 12 ... load heat exchanger, 13 ... preheat heat exchanger, 14 ...
Cold water outlet heat exchanger, 15 ... Second heat storage tank, 16, 17,
19, 20 ... Valve, 18 ... Discharge part, 21 ... Piping.
フロントページの続き (56)参考文献 特開 平５−118587（ＪＰ，Ａ) 特開 平２−97872（ＪＰ，Ａ) 特開 平４−263724（ＪＰ，Ａ) 特開 平３−241252（ＪＰ，Ａ)Continuation of front page (56) Reference JP-A-5-118587 (JP, A) JP-A-2-97872 (JP, A) JP-A-4-263724 (JP, A) JP-A-3-241252 (JP , A)
Claims (1)
を過冷却器に循環させて過冷却状態とし、この状態に変
化を与えることにより過冷却状態を解除して製氷し、蓄
熱槽内に蓄熱する過冷却製氷蓄熱装置において、 上記過冷却器を循環させる冷水回路中に、他の蓄熱槽の
温度の高い冷水が循環され、該冷水回路中の冷水を加熱
する熱交換器を設けたことを特徴とする過冷却製氷蓄熱
装置。1. A heat storage tank comprising a plurality of heat storage tanks, wherein cold water in the heat storage tanks is circulated to a supercooler to bring it into a supercooled state. In the supercooled ice heat storage device that stores heat in the tank, in the cold water circuit that circulates the supercooler, cold water having a high temperature in another heat storage tank is circulated, and a heat exchanger that heats the cold water in the cold water circuit is used. A supercooled ice heat storage device characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3279898A JP2563703B2 (en) | 1991-10-25 | 1991-10-25 | Subcooled ice heat storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3279898A JP2563703B2 (en) | 1991-10-25 | 1991-10-25 | Subcooled ice heat storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05118588A JPH05118588A (en) | 1993-05-14 |
| JP2563703B2 true JP2563703B2 (en) | 1996-12-18 |
Family
ID=17617463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3279898A Expired - Fee Related JP2563703B2 (en) | 1991-10-25 | 1991-10-25 | Subcooled ice heat storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2563703B2 (en) |
-
1991
- 1991-10-25 JP JP3279898A patent/JP2563703B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05118588A (en) | 1993-05-14 |
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