JP3080802B2 - Subcooled ice thermal storage device - Google Patents
Subcooled ice thermal storage deviceInfo
- Publication number
- JP3080802B2 JP3080802B2 JP04362154A JP36215492A JP3080802B2 JP 3080802 B2 JP3080802 B2 JP 3080802B2 JP 04362154 A JP04362154 A JP 04362154A JP 36215492 A JP36215492 A JP 36215492A JP 3080802 B2 JP3080802 B2 JP 3080802B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- temperature
- supercooled
- chilled water
- flow control
- 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】本発明は過冷却式氷蓄熱装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supercooled ice heat storage device.
【０００２】[0002]
【従来の技術】従来の過冷却式氷蓄熱装置の系統図が図
２に示されている。モータ１によって駆動されるターボ
冷凍機等の容量可変圧縮機２で圧縮された高温・高圧の
ガス冷媒は凝縮器４に入り、ここで伝熱管4a内を流過す
る冷却水に放熱することによって凝縮液化する。この液
冷媒は図示しない絞りを兼ねる冷媒流量調整装置を経て
過冷却熱交換器３に入り、ここで伝熱管3a内を流過する
冷水を冷却することによって蒸発気化した後、容量可変
圧縮機２に吸入されて再び圧縮される。2. Description of the Related Art A system diagram of a conventional supercooled ice heat storage device is shown in FIG. The high-temperature and high-pressure gas refrigerant compressed by the variable capacity compressor 2 such as a turbo refrigerator driven by the motor 1 enters the condenser 4 and radiates heat to the cooling water flowing through the heat transfer tube 4a. Condensed and liquefied. The liquid refrigerant enters the supercooling heat exchanger 3 via a refrigerant flow control device also serving as a throttle (not shown), where it is evaporated and vaporized by cooling the cold water flowing through the heat transfer tube 3a. And is compressed again.
【０００３】凝縮器４の伝熱管4aを流過することによっ
て昇温した冷却水は冷却塔17に入り、ここで大気に放熱
することによって降温した後、冷却水ポンプ14で付勢さ
れ、再び凝縮器４に循環する。[0003] The cooling water heated by flowing through the heat transfer tube 4a of the condenser 4 enters a cooling tower 17, where the temperature is lowered by releasing heat to the atmosphere, and the cooling water is energized by a cooling water pump 14 and again. Circulates to the condenser 4.
【０００４】蓄熱運転時、氷蓄熱槽10内に貯留されてい
るＯ℃の冷水は冷水ポンプ５によって抽出されて予熱熱
交換器７に入り、ここで予熱された後、バイパス回路21
及びこれに介装された開閉弁22を流過した冷水と合流し
て所定の温度（約＋0.5 ℃)となり、フィルター８を通
る過程で冷水中の氷核が除去された後、過冷却熱交換器
３に入り、その伝熱管3aを流過する過程で管外の冷媒と
熱交換することによって約−1.5 ℃に過冷却される。[0004] During the heat storage operation, the cold water of O ° C stored in the ice heat storage tank 10 is extracted by the chilled water pump 5 and enters the preheating heat exchanger 7 where it is preheated and then the bypass circuit 21.
And, it joins with the cold water flowing through the on-off valve 22 interposed therein and reaches a predetermined temperature (approximately + 0.5 ° C.). After entering the heat exchanger 3 and flowing through the heat transfer tube 3a, the heat exchanger 3 is supercooled to about -1.5 ° C. by exchanging heat with a refrigerant outside the tube.
【０００５】この過冷却水は冷水配管13を経て氷蓄熱槽
10に戻り、ここで過冷却状態が解除されることによりシ
ャーベット状の氷塊20を生成して蓄熱する。この間、戻
り管16内の冷水がポンプ31によって抽出されて予熱熱交
換器７に入り、その伝熱管7a内を流過することによって
冷却された後、供給管15に流入する。[0005] The supercooled water passes through a cold water pipe 13 and is stored in an ice heat storage tank.
Returning to 10, the supercooled state is released, so that sherbet-shaped ice blocks 20 are generated and stored. During this time, the cold water in the return pipe 16 is extracted by the pump 31 and enters the preheating heat exchanger 7, is cooled by flowing through the heat transfer pipe 7 a, and then flows into the supply pipe 15.
【０００６】過冷却熱交換器３の出口の冷水温度は温度
検出器11によって検出されてコントローラ12に入力され
る。このコントローラ12はサーボモータ18に出力してタ
ーボ冷凍機２の吸込ベーン19の開度を調整することによ
り過冷却熱交換器３出口の冷水温度を設定値に維持す
る。The temperature of the chilled water at the outlet of the supercooling heat exchanger 3 is detected by a temperature detector 11 and input to a controller 12. The controller 12 outputs a signal to the servomotor 18 to adjust the opening of the suction vane 19 of the centrifugal chiller 2 to maintain the temperature of the chilled water at the outlet of the subcooling heat exchanger 3 at a set value.
【０００７】放冷運転時には、氷蓄熱槽10内の冷水は冷
水ポンプ23によって抽出されて供給管15を経て冷房機等
の冷熱需要先24に送られ、ここで放冷することによって
昇温した冷水は戻り管16を経て氷蓄熱槽10内に戻る。During the cooling operation, the cold water in the ice heat storage tank 10 is extracted by the cold water pump 23 and sent to the cold demanding destination 24 such as a cooling machine through the supply pipe 15 where the temperature is raised by cooling. The cold water returns to the ice heat storage tank 10 via the return pipe 16.
【０００８】[0008]
【発明が解決しようとする課題】上記従来の装置では、
ターボ冷凍機２の吸込ベーン19の開度を調整したとき、
過冷却熱交換器３内の冷媒の蒸発圧力及び温度が急激に
変化するため、伝熱管3a内で冷水が凍結したり、冷水の
流動性が低下するおそれがあった。In the above-mentioned conventional apparatus,
When the opening of the suction vane 19 of the centrifugal chiller 2 is adjusted,
Since the evaporation pressure and temperature of the refrigerant in the subcooling heat exchanger 3 change rapidly, there is a possibility that the cold water freezes in the heat transfer tube 3a or the fluidity of the cold water decreases.
【０００９】[0009]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、冷媒を容量可変圧縮機、凝縮器、過冷却熱交換
器の順に循環させるとともに、氷蓄熱槽から予熱熱交換
器及びそのバイパス回路を経て供給された冷水を上記過
冷却熱交換器で過冷却状態に冷却した後、上記氷蓄熱槽
で過冷却状態を解除することにより氷を生成して蓄熱す
る過冷却式氷蓄熱装置において、上記過冷却熱交換器の
出入口の冷水温度をそれぞれ検出する温度検出器と、上
記予熱熱交換器の入口及びバイパス回路にそれぞれ設け
られた冷水流量調整弁と、上記過冷却熱交換器出口の冷
水温度が０℃以上のときに過冷却水が得られる容量に上
記圧縮機の容量を設定し、この状態で上記両温度検出器
による検出温度に応じて上記冷水流量調整弁の開度を増
減して上記過冷却熱交換器入口の冷水温度を調整するこ
とにより上記過冷却熱交換器出口の冷水温度を設定値に
維持するコントローラとを設けたことを特徴とする過冷
却式氷蓄熱装置にある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to provide a refrigerant with a variable capacity compressor, a condenser and a supercooling heat exchanger. While circulating in order, the cold water supplied from the ice heat storage tank through the preheating heat exchanger and its bypass circuit is cooled to the supercooled state by the supercooled heat exchanger, and then the supercooled state is released by the ice heat storage tank. In the supercooling type ice heat storage device that generates and stores ice by means of the above, a temperature detector for detecting the cold water temperature at the entrance and exit of the supercooling heat exchanger, and an inlet and a bypass circuit for the preheating heat exchanger are provided respectively. Chilled water flow regulating valve, and the capacity of the compressor is set to a capacity at which the supercooled water is obtained when the chilled water temperature at the outlet of the supercooled heat exchanger is 0 ° C. or higher. Due to the detected temperature A controller for maintaining the chilled water temperature at the outlet of the subcooling heat exchanger at a set value by adjusting the chilled water temperature at the inlet of the subcooling heat exchanger by increasing or decreasing the opening of the chilled water flow control valve. A supercooled ice heat storage device characterized in that:
【００１０】上記凝縮器への冷却水流量を調整するため
の冷却水流量調整弁を設け、上記冷水流量制御弁の開度
を増減することによって上記過冷却熱交換器出口の冷水
温度を設定値に維持できなくなったとき、上記コントロ
ーラにより上記冷却水流量調整弁の開度を制御すること
もできる。[0010] A cooling water flow control valve for adjusting the flow rate of cooling water to the condenser is provided, and the opening of the chilled water flow control valve is increased or decreased to set the chilled water temperature at the outlet of the subcooling heat exchanger to a set value. When it is no longer possible to maintain the cooling water flow rate, the opening degree of the cooling water flow control valve can be controlled by the controller.
【００１１】[0011]
【作用】本発明においては、上記構成を具えているた
め、過冷却熱交換器出口の冷水温度が０℃以上のとき過
冷却水が得られる容量に圧縮機の容量を設定し、この状
態で両温度検出器の検出温度に応じて冷水流量調整弁の
開度を増減して過冷却熱交換器入口の冷水温度を調整し
て過冷却熱交換器出口の冷水温度を設定値に維持する。In the present invention, since the above configuration is provided, the capacity of the compressor is set to a capacity at which the supercooled water is obtained when the chilled water temperature at the outlet of the supercooled heat exchanger is 0 ° C. or more. The chilled water temperature at the inlet of the subcooling heat exchanger is adjusted by increasing or decreasing the opening of the chilled water flow control valve in accordance with the temperature detected by both temperature detectors, and the chilled water temperature at the outlet of the subcooling heat exchanger is maintained at a set value.
【００１２】上記冷水流量制御弁の開度を増減すること
によって過冷却熱交換器出口の冷水温度を設定値に維持
できなくなったとき、冷却水流量調整弁の開度を制御す
る。When the chilled water temperature at the outlet of the supercooling heat exchanger cannot be maintained at the set value by increasing or decreasing the opening of the chilled water flow control valve, the opening of the cooling water flow control valve is controlled.
【００１３】[0013]
【実施例】本発明の１実施例が図１に示されている。過
冷却熱交換器３の入口における冷水の温度を検出する温
度検出器９及び過冷却熱交換器３の出口における冷水の
温度を検出する温度検出器11が設けられている。そし
て、予熱熱交換器７の入口には冷水流量調整弁６が設け
られ、バイパス回路21には冷水流量調整弁25が設けられ
ている。また、凝縮器4aの冷却水供給管26と冷却水流出
管27とを結ぶ短絡管28が設けられ、この短絡管28には冷
却水流量調整弁29が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. A temperature detector 9 for detecting the temperature of the chilled water at the inlet of the subcooling heat exchanger 3 and a temperature detector 11 for detecting the temperature of the chilled water at the outlet of the subcooling heat exchanger 3 are provided. A chilled water flow control valve 6 is provided at the inlet of the preheating heat exchanger 7, and a chilled water flow control valve 25 is provided in the bypass circuit 21. In addition, a short-circuit pipe 28 that connects the cooling water supply pipe 26 and the cooling water outflow pipe 27 of the condenser 4a is provided, and the short-circuit pipe 28 is provided with a cooling water flow control valve 29.
【００１４】温度検出器９、11の検出値はコントローラ
30に入力され、コントローラ30の出力はターボ冷凍機２
の吸込ベーン19駆動用サーボモータ18、冷水流量調整弁
６、25及び冷却水流量調整弁29に入力されてこれらの開
度を調整するようになっている。他の構成は図２に示す
従来のものと同様であり、対応する部材には同じ符号が
付されている。The detected values of the temperature detectors 9 and 11 are determined by a controller.
30 and the output of controller 30 is centrifugal chiller 2
Of the suction vane 19, the chilled water flow control valves 6, 25 and the chilled water flow control valve 29 to adjust their opening. The other configuration is the same as that of the conventional one shown in FIG. 2, and corresponding members are denoted by the same reference numerals.
【００１５】しかして、この氷蓄熱装置の蓄熱運転開始
時等過冷却熱交換器３の出口における冷水の温度が０℃
以上のときは、ターボ冷凍機２の容量が過冷却水が得ら
れる容量になるように吸込ベーン19の開度を設定する。
この状態で運転を継続することによって冷水は氷蓄熱槽
10と過冷却熱交換器３の間を循環して徐々に冷却され、
冷水の温度は次第に低下するが、過冷却熱交換器３の入
口における冷水温度は冷水の流動性を維持し、かつ、そ
の凍結を防止するための制約から＋0.3 〜0.8℃程度が
限界で、これ以下に低下させることは出来ない。When the temperature of the chilled water at the outlet of the supercooling heat exchanger 3 is 0 ° C., for example, when the heat storage operation of the ice heat storage device is started.
In the above case, the opening degree of the suction vane 19 is set so that the capacity of the centrifugal chiller 2 becomes a capacity for obtaining supercooled water.
By continuing the operation in this state, the cold water is stored in the ice storage tank.
Circulating between 10 and the supercooling heat exchanger 3 gradually cools down,
Although the temperature of the chilled water gradually decreases, the temperature of the chilled water at the inlet of the subcooling heat exchanger 3 is limited to about +0.3 to 0.8 ° C. due to restrictions for maintaining the flowability of the chilled water and preventing its freezing. , Cannot be reduced below this.
【００１６】そこで、温度検出器９による検出温度に応
じて冷水流量調整弁６、25の開度を増減して、過冷却熱
交換器３入口における冷水温度を調整することにより過
冷却熱交換器３出口の冷水温度が設定値になるように制
御する。冷水流量調整弁６、25の制御により過冷却熱交
換器３の出口の冷水温度を設定値に維持するのことが出
来なくなった時は、冷却水流量調整弁29の開度を調整し
て凝縮器４内の冷媒の凝縮圧力及び温度を変えるとによ
って過冷却熱交換器３における冷媒の蒸発圧力及び温度
の急変を避けて過冷却熱交換器３の出口の冷水温度を設
定値に維持する。Therefore, the degree of opening of the chilled water flow control valves 6, 25 is increased or decreased according to the temperature detected by the temperature detector 9, and the chilled water temperature at the inlet of the subcooled heat exchanger 3 is adjusted. Control is performed so that the chilled water temperature at the outlet 3 becomes a set value. When it becomes impossible to maintain the chilled water temperature at the outlet of the subcooling heat exchanger 3 at the set value by controlling the chilled water flow regulating valves 6 and 25, the opening degree of the cooling water flow regulating valve 29 is adjusted to condense. By changing the condensing pressure and temperature of the refrigerant in the heat exchanger 4, the sudden change of the evaporating pressure and temperature of the refrigerant in the supercooling heat exchanger 3 is avoided, and the chilled water temperature at the outlet of the supercooling heat exchanger 3 is maintained at a set value.
【００１７】[0017]
【発明の効果】本発明においては、過冷却熱交換器出口
の冷水温度が０℃以上のときに過冷却水が得られる容量
に圧縮機の容量を設定し、この状態で両温度検出器の検
出温度に応じて冷水流量調整弁の開度を増減して過冷却
熱交換器入口の冷水温度を調整して過冷却熱交換器出口
の冷水温度を設定値に維持しているため、過冷却熱交換
器における冷媒の蒸発圧力、温度の急変を回避しうるの
で、冷水の流動性低下及び管内での凍結を防止できる。According to the present invention, the capacity of the compressor is set to a capacity at which the supercooled water can be obtained when the temperature of the chilled water at the outlet of the supercooled heat exchanger is 0 ° C. or higher. The cooling water temperature at the inlet of the supercooling heat exchanger is adjusted by increasing or decreasing the opening of the chilled water flow control valve according to the detected temperature, and the chilled water temperature at the outlet of the supercooling heat exchanger is maintained at the set value. Since it is possible to avoid a sudden change in the evaporation pressure and temperature of the refrigerant in the heat exchanger, it is possible to prevent a decrease in the flowability of the cold water and freezing in the pipe.
【００１８】冷水流量制御弁の開度を増減することによ
って過冷却熱交換器出口の冷水温度を設定値に維持でき
なくなったとき、冷却水流量調整弁の開度を制御して、
凝縮器への冷却水流量を調整すれば、過冷却熱交換器出
口の冷水温度を設定値に維持できる。When the chilled water temperature at the outlet of the subcooling heat exchanger cannot be maintained at the set value by increasing or decreasing the opening of the chilled water flow control valve, the opening of the cooling water flow control valve is controlled,
By adjusting the flow rate of the cooling water to the condenser, the temperature of the cooling water at the outlet of the supercooling heat exchanger can be maintained at the set value.
【図１】本発明の１実施例を示す系統図である。FIG. 1 is a system diagram showing one embodiment of the present invention.
【図２】従来の装置の系統図である。FIG. 2 is a system diagram of a conventional device.
２ 容量可変圧縮機 ４ 凝縮器 ３ 過冷却熱交換器 10 氷蓄熱槽 ７ 予熱熱交換器 21 バイパス回路 ９、11 温度検出器 ６、25 冷水流量調整弁 30 コントローラ 29 冷却水流量調整弁 2 Variable capacity compressor 4 Condenser 3 Subcooling heat exchanger 10 Ice storage tank 7 Preheating heat exchanger 21 Bypass circuit 9, 11 Temperature detector 6, 25 Chilled water flow control valve 30 Controller 29 Cooled water flow control valve
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F24F 5/00 F25C 1/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) F24F 5/00 F25C 1/00
Claims (2)
熱交換器の順に循環させるとともに、氷蓄熱槽から予熱
熱交換器及びそのバイパス回路を経て供給された冷水を
上記過冷却熱交換器で過冷却状態に冷却した後、上記氷
蓄熱槽で過冷却状態を解除することにより氷を生成して
蓄熱する過冷却式氷蓄熱装置において、上記過冷却熱交
換器の出入口の冷水温度をそれぞれ検出する温度検出器
と、上記予熱熱交換器の入口及びバイパス回路にそれぞ
れ設けられた冷水流量調整弁と、上記過冷却熱交換器出
口の冷水温度が０℃以上のときに過冷却水が得られる容
量に上記圧縮機の容量を設定し、この状態で上記両温度
検出器による検出温度に応じて上記冷水流量調整弁の開
度を増減して上記過冷却熱交換器入口の冷水温度を調整
することにより上記過冷却熱交換器出口の冷水温度を設
定値に維持するコントローラとを設けたことを特徴とす
る過冷却式氷蓄熱装置。The refrigerant is circulated in the order of a variable capacity compressor, a condenser, and a supercooling heat exchanger, and chilled water supplied from an ice heat storage tank through a preheating heat exchanger and a bypass circuit thereof is subjected to the supercooling heat exchange. After cooling to a supercooled state with a heat exchanger, the supercooled ice heat storage device that generates ice and stores heat by releasing the supercooled state in the ice heat storage tank, the cold water temperature at the entrance and exit of the supercooled heat exchanger. A temperature detector for detecting each, a chilled water flow control valve provided at each of the inlet and the bypass circuit of the preheating heat exchanger, and supercooled water when the chilled water temperature at the outlet of the supercooled heat exchanger is 0 ° C or more. The capacity of the compressor is set to the obtained capacity, and in this state, the opening degree of the chilled water flow control valve is increased or decreased according to the temperature detected by the two temperature detectors to increase the chilled water temperature at the inlet of the subcooling heat exchanger. By adjusting above A supercooled ice heat storage device comprising: a controller for maintaining a temperature of a chilled water at an outlet of a supercooled heat exchanger at a set value.
めの冷却水流量調整弁を設け、上記冷水流量制御弁の開
度を増減することによって上記過冷却熱交換器出口の冷
水温度を設定値に維持できなくなったとき、上記コント
ローラにより上記冷却水流量調整弁の開度を制御するこ
とを特徴とする請求項１記載の過冷却式氷蓄熱装置。2. A cooling water flow control valve for adjusting the flow rate of cooling water to the condenser is provided, and the temperature of the cooling water at the outlet of the supercooling heat exchanger is reduced by increasing or decreasing the opening of the cooling water flow control valve. 2. The supercooled ice heat storage device according to claim 1, wherein the controller controls the opening degree of the cooling water flow control valve when the set value cannot be maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04362154A JP3080802B2 (en) | 1992-12-25 | 1992-12-25 | Subcooled ice thermal storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04362154A JP3080802B2 (en) | 1992-12-25 | 1992-12-25 | Subcooled ice thermal storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06193921A JPH06193921A (en) | 1994-07-15 |
| JP3080802B2 true JP3080802B2 (en) | 2000-08-28 |
Family
ID=18476088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04362154A Expired - Fee Related JP3080802B2 (en) | 1992-12-25 | 1992-12-25 | Subcooled ice thermal storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3080802B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4518544B2 (en) * | 2004-04-20 | 2010-08-04 | 三建設備工業株式会社 | Operation control device for steam compression refrigerator |
| US7824725B2 (en) | 2007-03-30 | 2010-11-02 | The Coca-Cola Company | Methods for extending the shelf life of partially solidified flowable compositions |
| KR102609495B1 (en) * | 2023-06-22 | 2023-12-05 | 주식회사 대일 | Ice making system using supercooling |
-
1992
- 1992-12-25 JP JP04362154A patent/JP3080802B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06193921A (en) | 1994-07-15 |
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