JPH02192538A - Low temperature cold water making device - Google Patents
Low temperature cold water making deviceInfo
- Publication number
- JPH02192538A JPH02192538A JP1007795A JP779589A JPH02192538A JP H02192538 A JPH02192538 A JP H02192538A JP 1007795 A JP1007795 A JP 1007795A JP 779589 A JP779589 A JP 779589A JP H02192538 A JPH02192538 A JP H02192538A
- Authority
- JP
- Japan
- Prior art keywords
- cold water
- temperature
- pline
- heat exchanger
- heat
- 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.)
- Granted
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、冷水製造装置に係わり、特に９調用の冷房、
工業用プロセスの冷却等に用いて、効率的な冷水製造装
置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chilled water production device, and in particular, to a 9-tone air conditioner,
This invention relates to an efficient cold water production device used for cooling industrial processes, etc.
冷凍機又はヒートポンプで冷水ｔ−ｇ造する場合、従来
は水の凍結による伝熱チューブの破損事故を懸念して、
冷水温度は５℃が下限でるつた。空調の分野では、５〜
７℃の冷水を空調機に送り、冷風と熱交換し、約１０−
１２０に上昇して戻るという循環が一般的である。又、
蓄熱機を介する場合でも蓄熱の有効温度差は１０℃−５
℃又は１２℃−５℃の５℃〜７℃の範囲であった。When producing cold water using a refrigerator or heat pump, conventional methods
The lower limit of the cold water temperature was 5°C. In the field of air conditioning, 5~
7℃ cold water is sent to the air conditioner and heat exchanged with the cold air, resulting in a temperature of about 10℃.
A cycle of rising to 120 and returning is common. or,
Even when using a heat storage device, the effective temperature difference for heat storage is 10℃-5
The temperature ranged from 5°C to 7°C or 12°C to 5°C.
ｍ１、工業分野では、プロセスによって、冷却する液体
の温度は異なるが、マイルド・プラインと称される使用
温度範囲が最も多い。マイルド・プラインとは、エチレ
ングリコール水溶液、プロピレンゲルコール水溶液、塩
化カルシウム水溶液等である。これらの不凍液は約５℃
〜−３０℃の範囲で使用されている。m1. In the industrial field, the temperature of the cooling liquid varies depending on the process, but the most commonly used temperature range is called mild prine. Mild prine includes ethylene glycol aqueous solution, propylene gelcol aqueous solution, calcium chloride aqueous solution, and the like. These antifreezes have a temperature of approximately 5℃
It is used in the range of -30°C.
空調分野においては、空調に利用される循環水の温度差
を大きくすることにより、循環水量の減少、輸送管径の
縮少によ夕、省エネルギと設備費の減少が望まれる。更
に、都市のビル地下室に設けられる蓄熱槽もその大きさ
に制限がろるので、大きさを同じにして蓄熱容量を増大
することができれば、深夜電力を利用した安価な電力料
金が利用できるから、このような蓄熱機の普及が望まれ
ている。In the field of air conditioning, it is desirable to reduce the amount of circulating water, reduce the diameter of transport pipes, save energy, and reduce equipment costs by increasing the temperature difference of circulating water used for air conditioning. Furthermore, there are restrictions on the size of heat storage tanks installed in the basements of buildings in cities, so if the heat storage capacity can be increased while keeping the size the same, it will be possible to use late-night electricity at cheaper electricity rates. It is desired that such heat storage devices become widespread.
また、工業用途においても、伝熱が悪く、腋の粘性も高
く、かつ腐食性のある不凍液はできる限り水に代えるこ
とによって、省エネルギとなり保守管理もしやすくなる
ことは明らかであった。Furthermore, in industrial applications, it has become clear that energy can be saved and maintenance management can be made easier by replacing antifreeze, which has poor heat transfer, high viscosity, and corrosive properties, with water as much as possible.
しかしながら、従来技術においては、冷水の冷却度を上
げると凍結による伝熱チューブの破損の問題が生じ、冷
水の温度は十分に低下することはできなかった。However, in the prior art, increasing the degree of cooling of the cold water causes the problem of damage to the heat transfer tubes due to freezing, and the temperature of the cold water cannot be lowered sufficiently.
本発明は、上記の要望に鑑み、凍結破損等の心配のない
冷水の温度が０℃近くまで冷却できる冷水製造装置を提
供することを目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned needs, an object of the present invention is to provide a cold water production device that can cool the cold water to a temperature close to 0° C. without worrying about freezing and damage.
本発明は、冷凍機又はヒートポンプと、プラインと冷水
との熱交換器と、前記両者を連結するプライン配管、プ
ライン循環ポンプ及びプラインタンク等からなるプライ
ン循環系の設備と、熱交換器に連結する冷水配管、冷水
供給ポンプ及び冷水蓄熱槽等からなる冷水循環系の設備
とからなる冷水製造及び冷水蓄熱装置において、熱交換
器出口における冷水温度を凍結点近傍即ち０℃近くに維
持するために、当該熱交換器出口の冷水温度を検出する
手段と前記冷凍機又はヒートポンプの蒸発器出口のプラ
イン温度を検出する手段との両手段を設け、冷水温度が
０℃以上でも、プライン温度が熱交換器内部で冷水を部
分的に凍結開始させる温度に達した場合、プライン温度
をわずかに上昇させて、凍結を回避させるための制御装
置を備えてなる冷水製造装置である。The present invention provides equipment for a pline circulation system consisting of a refrigerator or a heat pump, a heat exchanger for pline and cold water, pline piping connecting the two, a pline circulation pump, a pline tank, etc., and a pline circulation system connected to the heat exchanger. In a cold water production and cold water heat storage device consisting of cold water circulation system equipment consisting of cold water piping, a cold water supply pump, a cold water heat storage tank, etc., in order to maintain the cold water temperature at the heat exchanger outlet near the freezing point, that is, near 0 ° C. Both means for detecting the chilled water temperature at the outlet of the heat exchanger and means for detecting the pline temperature at the outlet of the evaporator of the refrigerator or heat pump are provided, so that even if the chilled water temperature is 0° C. or higher, the pline temperature does not reach the heat exchanger. This cold water production device is equipped with a control device for slightly raising the prine temperature to avoid freezing when the temperature reaches a point where the cold water starts to partially freeze inside.
次に、本発明の詳細な説明する。Next, the present invention will be explained in detail.
本発明では、予め、実機試験を行って、その結果により
熱交換器のプライン入口におけるプライン温度の下限を
定めておき、通常運転中は冷水出口温度で冷凍機又はヒ
ートポンプの圧縮機の容量を容量制御装置で制御してい
るが、同時にプライン入口温度も検出しておき、前述の
予め定めたプライン下限温度に達したならば、容量制御
手段を冷水出口温度制御からプライン入口温度制御に切
り換えてプライン温度をわずかに上昇させるものである
。In the present invention, an actual machine test is conducted in advance, and the lower limit of the pline temperature at the pline inlet of the heat exchanger is determined based on the results. During normal operation, the capacity of the compressor of the refrigerator or heat pump is set at the chilled water outlet temperature. It is controlled by a control device, but the pline inlet temperature is also detected at the same time, and when the predetermined pline lower limit temperature mentioned above is reached, the capacity control means is switched from chilled water outlet temperature control to pline inlet temperature control and the pline is stopped. It raises the temperature slightly.
以上の基本制御によって、負荷変動等が生じても凍結せ
ず、０℃近くの冷水が製造できるものである。With the above basic control, it is possible to produce cold water at a temperature close to 0° C. without freezing even if load fluctuations occur.
更に、本発明では、制御装置の追従性より急激な負荷変
動をも考慮して、プライン入口温度が下限値となり、プ
ライン入口温度制御に切り換わったときに、冷水流量を
一時的に強制増大させる方式を併用するのがよく、この
ために、熱交換器の冷水入口に可変速制御装置を設ける
ことによって、凍結を未然に防止することができる。こ
の場合、冷水ポンプは回転数制御が行える装置を設置す
る必要がある。Furthermore, in the present invention, taking into account sudden load fluctuations due to the followability of the control device, when the pline inlet temperature reaches the lower limit value and switching to pline inlet temperature control, the cold water flow rate is temporarily forcibly increased. For this purpose, freezing can be prevented by providing a variable speed control device at the cold water inlet of the heat exchanger. In this case, it is necessary to install a device that can control the rotation speed of the cold water pump.
また、同様に、流量を増大させる換りに冷水入口温度を
一時的に強制上昇させても同じ効果がある。この方式は
計画し丸め水入口温度よりも高温の冷水を混合して行う
ものである。このために、冷水蓄熱槽内の温度分布を考
慮して、最も高温部分の冷水を混合する手段を設けてお
くのがよい。Similarly, the same effect can be obtained by temporarily forcibly increasing the cold water inlet temperature instead of increasing the flow rate. This method is designed to mix cold water with a temperature higher than the temperature at the water inlet. For this purpose, it is preferable to consider the temperature distribution within the cold water heat storage tank and provide a means for mixing the cold water in the highest temperature area.
本発明では、冷凍機又はヒートポンプによって、−３℃
程度のプラインを製造し、このプラインを熱交換器のチ
ューブ内に通し、チューブ外には冷水を通水し、冷水を
冷却する装置において、この冷水出口を凍結させずに０
℃近くの温度に保つように制御するものである。In the present invention, -3°C is heated by a refrigerator or a heat pump.
This pline is passed through the tube of the heat exchanger, and cold water is passed through the outside of the tube.
It is controlled to keep the temperature close to ℃.
ところで、冷水が凍結した場合を考察すると、冷水出口
温度は冷水と氷表面との伝熱によって、凍結しても０℃
を保つ。ところが、プラインは、凍結した氷によって伝
熱が阻害され、熱交換量が減少することによってプライ
ン温度が低下し、増々凍結を促進させることになる。By the way, if we consider the case where cold water freezes, the cold water outlet temperature will remain at 0℃ due to heat transfer between the cold water and the ice surface.
keep it. However, in the pline, heat transfer is inhibited by frozen ice, and the amount of heat exchange is reduced, which lowers the prine temperature and further promotes freezing.
そこで、本発明では、冷水出口温度とともにプライン入
口温度をも検出しておき、プライン温度によって冷水の
凍結を防止するように制御するものである。Therefore, in the present invention, the pline inlet temperature is detected as well as the cold water outlet temperature, and control is performed to prevent the cold water from freezing based on the pline temperature.
以下、本発明を具体的に図面を用いて説明するが、本発
明はこの実施例に限定されるものではない。The present invention will be specifically described below with reference to the drawings, but the present invention is not limited to these embodiments.
実施例１
第１図は、本発明の一実施例を示す冷水委造装置のフロ
ー概略図である。Embodiment 1 FIG. 1 is a schematic flow diagram of a cold water construction apparatus showing an embodiment of the present invention.
第１図において、１は冷凍機又はヒートポンプ、２はプ
ラインと冷水との熱交換器、７［冷水蓄熱槽である。冷
凍機又はヒートポンプ内において、１７はクーラを、１
Ｂは圧縮機を表わし、プラインはクーラ１７において冷
却されて、熱交換器２で冷水との間の熱交換が行なわれ
、プラインタンク４で貯蔵されて、プラインポンプ３に
より、クーラ１７へと循環するサイクルをとる。−万冷
水は冷水蓄熱槽７の高温側ａから冷水１次ポンプ５によ
り熱交換器２に送られ、ここでプラインにより冷却され
て、冷水蓄熱槽７の低温側すに戻される。そして、この
冷水蓄熱槽７の低温側すの冷水が、冷水２次ポンプ８．
１０により、空調負荷９．１１に送られて、温度の上昇
した冷水が冷水蓄熱槽７の高温側ａに循環される。In FIG. 1, 1 is a refrigerator or a heat pump, 2 is a heat exchanger between a prine and cold water, and 7 is a cold water heat storage tank. In the refrigerator or heat pump, 17 is the cooler, 1
B represents a compressor, the pline is cooled in the cooler 17, heat exchanged with cold water in the heat exchanger 2, stored in the pline tank 4, and circulated to the cooler 17 by the pline pump 3. Take the cycle of doing. - The cold water is sent from the high temperature side a of the cold water heat storage tank 7 to the heat exchanger 2 by the cold water primary pump 5, where it is cooled by a pline and returned to the low temperature side of the cold water heat storage tank 7. Then, the cold water in the low temperature side of the cold water heat storage tank 7 is transferred to the cold water secondary pump 8.
10, the cold water whose temperature has increased by being sent to the air conditioning load 9.11 is circulated to the high temperature side a of the cold water heat storage tank 7.
ところで、このような循環系におｈて、通常の操作では
熱交換器２の冷水出口温度を検出器１２によって検出し
、冷水温度ｔ−０℃近くに保つように、冷凍機１の圧縮
機１８を容量制御する。このため、冷水出口温度コント
ローラ１３から指令して容量制御装置１６を可動させる
ものである。By the way, in such a circulation system, in normal operation, the temperature of the cold water outlet of the heat exchanger 2 is detected by the detector 12, and the compressor of the refrigerator 1 is turned on to maintain the cold water temperature near t-0°C. 18 to control the capacity. For this reason, the capacity control device 16 is operated by commands from the chilled water outlet temperature controller 13.
一万、プライン入口温度の下限は、予め実機試験により
冷水の凍結しない温度を定めておき、プライン入口温度
は検出器１４により検出しておく。そして、何かの異常
によってその検出値が、予め定めた下限以下となった場
合は、圧縮機の容量制御を冷水出口温度による制御から
、プライン入口温度コントローラ１５による制御に切ｐ
換えて、プライン温度を少し上昇させて凍結を回避させ
るものである。さらに、この場合に、同時に、可変速制
御装＃６を制御するととにより、冷水１次ポンプの容ｆ
を上げて、冷水流量を一時的に増量させるとより有効に
凍結が回避できる。The lower limit of the prine inlet temperature is determined in advance by an actual machine test at a temperature at which the cold water does not freeze, and the pline inlet temperature is detected by the detector 14. If the detected value falls below a predetermined lower limit due to some abnormality, the capacity control of the compressor is switched from control based on the chilled water outlet temperature to control using the pline inlet temperature controller 15.
Instead, the prine temperature is slightly raised to avoid freezing. Furthermore, in this case, by controlling variable speed control device #6 at the same time, the capacity f of the chilled water primary pump is
Freezing can be more effectively avoided by raising the temperature and temporarily increasing the flow rate of cold water.
本発明においては、凍結せずＫＯ℃近い冷水が製造でき
る。従来、空調分野においては、５℃の冷水を送り空調
機から１０℃で戻し、冷凍機で再び５℃迄冷却する冷水
循環系であるが、この場合１Ｏ−５＝５℃の温度差を利
用してｈたわけであす、本発明のように０℃の水が得ら
れれば１Ｏ−０＝１０℃の温度差が利用出来る。In the present invention, cold water close to KO° C. can be produced without freezing. Conventionally, in the air conditioning field, a cold water circulation system is used that sends cold water at 5℃ from an air conditioner, returns it at 10℃, and cools it again to 5℃ in a refrigerator, but in this case, a temperature difference of 1O-5 = 5℃ is used. Therefore, if water at 0°C can be obtained as in the present invention, a temperature difference of 10-0 = 10°C can be utilized.
前記のように、本発明においては、従来のものより２倍
の温度差が利用できるから、次式から、循環水量が半分
で済み、ポンプ動力（搬送動力）、配管径の縮少が可能
となる効果がある。As mentioned above, in the present invention, twice the temperature difference can be used compared to the conventional one, so from the following equation, the amount of circulating water can be halved, and the pump power (conveying power) and pipe diameter can be reduced. There is a certain effect.
Ｑ＝ＧｘΔＴｘｒｘｈ −・１１ （１１一方
、蓄熱容量も（１）式のＧを蓄熱槽内保有水量に置き換
えることによって、有効利用できる温度差Δでが倍増す
ることによって蓄熱容量も倍増できる。Q=GxΔTxrxh −・11 (11 On the other hand, by replacing G in equation (1) with the amount of water held in the heat storage tank, the heat storage capacity can also be doubled by doubling the effectively usable temperature difference Δ.
第１図は本発明の一実施例を示す冷水製造装置の７０−
概略図である。
１・・・冷凍機又はヒートポンプ、２・・・熱交換器、
３・・・プラインタンク％ ４・・・プラインタンク、
５・・・冷水１次ポンプ、６・・・可変速制御装置、７
・・・冷水蓄熱槽、８．１０・・・冷水２次ポンプ、９
．１１・・・空調負荷、１２・・・冷水出口温度検出器
、１３・・・冷水出口温度コントローラ、１４・・・プ
ライン入口温度検出器、１５・・・プライン入口温度コ
ントローラ、１６・・・容量制御装置、１７・・・クー
ラ、１８・・・圧ｍ機、ａ・・・蓄熱槽高温側、ｂ・・
・蓄熱槽低温側FIG. 1 shows an example of a cold water production apparatus 70-
It is a schematic diagram. 1... Refrigerator or heat pump, 2... Heat exchanger,
3... Pline tank% 4... Pline tank,
5... Cold water primary pump, 6... Variable speed control device, 7
... Cold water heat storage tank, 8.10 ... Cold water secondary pump, 9
．． 11... Air conditioning load, 12... Chilled water outlet temperature detector, 13... Chilled water outlet temperature controller, 14... Pline inlet temperature detector, 15... Pline inlet temperature controller, 16... Capacity Control device, 17... Cooler, 18... Pressure machine, a... Heat storage tank high temperature side, b...
・Heat storage tank low temperature side
Claims (1)
交換器と、前記両者を連結するプライン配管、プライン
循環ポンプ及びプラインタンク等からなるプライン循環
系の設備と、熱交換器に連結する冷水配管、冷水供給ポ
ンプ及び冷水蓄熱槽等からなる冷水循環系の設備とから
なる冷水製造及び冷水蓄熱装置において、熱交換器出口
における冷水温度を凍結点近傍、即ち０℃近くに維持す
るために、当該熱交換器出口の冷水温度を検出する手段
と前記冷凍機又はヒートポンプの蒸発器出口のプライン
温度を検出する手段との両手段を設け、冷水温度が０℃
以上でも、プライン温度が熱交換器内部で冷水を部分的
に凍結開始させる温度に達した場合、プライン温度をわ
ずかに上昇させて、凍結を回避させるための制御装置を
備えてなる冷水製造装置。 ２、請求項１記載の冷水製造装置において、プライン温
度をわずかに上昇させて、凍結を回避させるための制御
装置に加えて、冷水流量を一時的に増量させて、冷水の
凍結を回避させるための制御装置をも備えたことを特徴
とする冷水製造装置。 ３、請求項１又は２記載の冷水製造装置において、冷水
入口温度を一時的に上昇させて、冷水の凍結を回避させ
るための制御装置をも備えたことを特徴とする冷水製造
装置。[Scope of Claims] 1. Equipment of a pline circulation system consisting of a refrigerator or heat pump, a heat exchanger between pline and cold water, pline piping connecting the two, a pline circulation pump, a pline tank, etc., and a heat exchanger. In a cold water production and cold water heat storage system consisting of cold water piping connected to a heat exchanger, a cold water circulation system consisting of a cold water supply pump, a cold water heat storage tank, etc., the temperature of the cold water at the outlet of the heat exchanger is kept close to the freezing point, that is, close to 0°C. In order to maintain the chilled water temperature at 0°C, both means for detecting the cold water temperature at the outlet of the heat exchanger and means for detecting the pline temperature at the outlet of the evaporator of the refrigerator or heat pump are provided.
As described above, the cold water production apparatus includes a control device for slightly increasing the prine temperature to avoid freezing when the prine temperature reaches a temperature at which the cold water starts to partially freeze inside the heat exchanger. 2. In the chilled water production apparatus according to claim 1, in addition to the control device for slightly increasing the prine temperature to avoid freezing, the chilled water flow rate is temporarily increased to avoid freezing of the chilled water. A chilled water production device characterized in that it is also equipped with a control device. 3. The chilled water producing apparatus according to claim 1 or 2, further comprising a control device for temporarily increasing the cold water inlet temperature to avoid freezing of the chilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1007795A JPH02192538A (en) | 1989-01-18 | 1989-01-18 | Low temperature cold water making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1007795A JPH02192538A (en) | 1989-01-18 | 1989-01-18 | Low temperature cold water making device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02192538A true JPH02192538A (en) | 1990-07-30 |
| JPH0477216B2 JPH0477216B2 (en) | 1992-12-07 |
Family
ID=11675581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1007795A Granted JPH02192538A (en) | 1989-01-18 | 1989-01-18 | Low temperature cold water making device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02192538A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05133693A (en) * | 1991-11-12 | 1993-05-28 | Daikin Ind Ltd | Water cooler |
| WO2014091548A1 (en) * | 2012-12-11 | 2014-06-19 | 三菱電機株式会社 | Air conditioning hot water supply composite system |
| JP5626918B2 (en) * | 2009-11-25 | 2014-11-19 | 三菱電機株式会社 | Auxiliary heater control device, heating fluid utilization system, and auxiliary heater control method |
| JP2018119764A (en) * | 2017-01-27 | 2018-08-02 | スリーベネフィッツ株式会社 | Controller of heat source system and control method thereof |
-
1989
- 1989-01-18 JP JP1007795A patent/JPH02192538A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05133693A (en) * | 1991-11-12 | 1993-05-28 | Daikin Ind Ltd | Water cooler |
| JP5626918B2 (en) * | 2009-11-25 | 2014-11-19 | 三菱電機株式会社 | Auxiliary heater control device, heating fluid utilization system, and auxiliary heater control method |
| US9291376B2 (en) | 2009-11-25 | 2016-03-22 | Mitsubishi Electric Corporation | Auxiliary heater control device, heated fluid utilization system, and auxiliary heater control method |
| WO2014091548A1 (en) * | 2012-12-11 | 2014-06-19 | 三菱電機株式会社 | Air conditioning hot water supply composite system |
| JP5984965B2 (en) * | 2012-12-11 | 2016-09-06 | 三菱電機株式会社 | Air conditioning and hot water supply complex system |
| US9631826B2 (en) | 2012-12-11 | 2017-04-25 | Mistubishi Electric Corporation | Combined air-conditioning and hot-water supply system |
| JP2018119764A (en) * | 2017-01-27 | 2018-08-02 | スリーベネフィッツ株式会社 | Controller of heat source system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0477216B2 (en) | 1992-12-07 |
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