JPH0317052B2 - - Google Patents
Info
- Publication number
- JPH0317052B2 JPH0317052B2 JP58168919A JP16891983A JPH0317052B2 JP H0317052 B2 JPH0317052 B2 JP H0317052B2 JP 58168919 A JP58168919 A JP 58168919A JP 16891983 A JP16891983 A JP 16891983A JP H0317052 B2 JPH0317052 B2 JP H0317052B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerator
- refrigerators
- load
- input
- value
- 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 - Lifetime
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- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】
本発明は、高層ビルなどに設ける空調用冷凍機
の省エネルギー運転制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an energy-saving operation control method for an air conditioning refrigerator installed in a high-rise building or the like.
例えば、第１図に示すように１台の放熱器１に
対し複数台の冷凍機２を並列に配設して一つの冷
却系を構成する場合、冷房の必要程度に応じて順
次稼動させる冷凍機２の運転台数の増していくこ
とになる。 For example, when configuring one cooling system by arranging a plurality of refrigerators 2 in parallel to one radiator 1 as shown in Fig. 1, the refrigerators are operated in sequence according to the degree of cooling required. The number of Aircraft 2 in operation will increase.
まず、該冷凍機２の個々について見ると、第２
図に示すように入力（電力）に対する負荷特性は
60〜100％の負荷を与えるので消費電力が少なく
てすみ経済的な安定運転ができる。 First, looking at each of the refrigerators 2, the second
As shown in the figure, the load characteristics with respect to input (power) are
Since it applies a load of 60 to 100%, power consumption is low and economical and stable operation is possible.
従来は、この負荷の％を定めるのにカロリー計
算をもとにして決定していた。すなわち、該カロ
リーは、
Qkcal＝（入口温度−出口温度）×比重×比熱×流
量で決定され、このうち流量は一定のものと想定
されるのでカロリーは主として、入口、出口の温
度差に比例する。また、冷凍機２定格能力が定め
られており、実際のカロリー値がこの定格能力の
カロリー値に対してどの程度かで前記％が算出さ
れる。 Conventionally, the percentage of this load was determined based on calorie calculation. That is, the calorie is determined by Qkcal = (inlet temperature - outlet temperature) x specific gravity x specific heat x flow rate, and since the flow rate is assumed to be constant, the calorie is mainly proportional to the temperature difference between the inlet and outlet. . Further, the rated capacity of the refrigerator 2 is determined, and the percentage is calculated based on how much the actual calorie value is with respect to the calorie value of this rated capacity.
一方、第３図に示すように冷凍機２の投入台数
を制御するには、例えば１台の冷凍機の最大負荷
が100kcalであるとすれば４台の合計は400kcalで
あり、１台目の冷凍機が100％の負荷（100kcal）
を発揮した段階で２台目の冷凍機を投入し、
100kcalを２台の冷凍機で分担して50kcalずつ50
％の負荷状態から徐々に高めていく。この２台の
冷凍機がともに100％の負荷、合計200kcalを発揮
した段階で３台目の冷凍機を投入し、200kcalを
３台の冷凍機で分担して約66％の負荷状態から
徐々に高め、同様にして４台目の冷凍機の投入時
には各冷凍機の負荷は75％となる。 On the other hand, as shown in Fig. 3, in order to control the number of chillers 2 to be input, if the maximum load of one chiller is 100 kcal, the total load of the four chillers is 400 kcal, and the Freezer is at 100% load (100kcal)
At the stage when the temperature reached its full potential, the second refrigerator was turned on,
Divide 100kcal between two freezers and make 50kcal each.
% load and gradually increase it. When these two refrigerators are both at 100% load, producing a total of 200kcal, the third refrigerator is turned on, and the 200kcal is shared between the three refrigerators, gradually starting from a load of approximately 66%. In the same way, when the fourth refrigerator is turned on, the load on each refrigerator becomes 75%.
このようにして冷凍機２は常に50〜100％の負
荷状態で運転され、前記のごとく消費電力の少な
い経済運転が行われる。 In this way, the refrigerator 2 is always operated at a load of 50 to 100%, and economical operation with low power consumption is performed as described above.
しかし、実際の冷凍機では条件によつては定格
以上の出力を生じる場合もあり、また逆にシステ
ム全体が時間の経過とともに老朽化すると冷却水
が通る冷凍機内の熱交換器内部などが汚れ、これ
を原因として所定の入力（電力）を与えても期待
された定格出力を得られない場合もある。 However, in actual refrigerators, depending on the conditions, the output may exceed the rated output, and conversely, as the entire system deteriorates over time, the inside of the heat exchanger inside the refrigerator, through which cooling water passes, becomes dirty. Due to this, the expected rated output may not be obtained even if a predetermined input (power) is applied.
本発明の目的は前記従来例の不都合を解消し、
経年変化などに影響されずに適確な制御をなすこ
とができる空調用冷凍機の省エネルギー運転制御
方法を提供することにある。 The purpose of the present invention is to eliminate the disadvantages of the conventional example,
An object of the present invention is to provide an energy-saving operation control method for an air conditioning refrigerator that can perform accurate control without being affected by aging.
しかしてこの目的は本発明によれば、一つの冷
却系で複数台の冷凍機を並列に設置した場合にお
いて、各冷凍機に電流検出器を設け、各冷凍機の
負荷状況をこの冷凍器の定格電流値における実際
入力電流値で判断し、まず、第１台目の冷凍機の
入力電流が定格電流値から安全値を引いた値より
も大きい場合で、かつ負荷が上昇傾向にある場合
は第２台目の冷凍機を起動し、この２台の冷凍機
の内、入力大な冷凍機の入力電流が定格電流値か
ら安全値を引いた値よりも大きい場合で、かつ負
荷が上昇傾向にある場合は第３台目の冷凍機を起
動し、一方、２台の冷凍機の内、入力大な冷凍機
の入力電流が定格電流値から安全値を引いた値よ
りも小さい場合で、２台の冷凍機の入力電流の平
均が一定値以下の場合で、かつ負荷が下降傾向に
ある場合はその内の一台を停止し、以下同様に、
第４台目の冷凍機の起動、もしくは３台起動して
いる冷凍機の内の１台の停止を決定していくこと
により達成される。 However, according to the present invention, when a plurality of refrigerators are installed in parallel in one cooling system, a current detector is installed in each refrigerator, and the load status of each refrigerator is detected. Judging from the actual input current value at the rated current value, first, if the input current of the first refrigerator is greater than the rated current value minus the safety value, and if the load is increasing. When the second refrigerator is started and the input current of the refrigerator with the larger input is greater than the rated current value minus the safety value, and the load is increasing. If the input current of the larger input refrigerator among the two refrigerators is smaller than the rated current value minus the safety value, the third refrigerator will be started. If the average input current of the two refrigerators is below a certain value and the load is on a downward trend, one of the refrigerators is stopped, and the same applies.
This is achieved by deciding to start the fourth refrigerator or to stop one of the three activated refrigerators.
以下、図面について本発明の実施例を詳細に説
明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図に示すように１台の放熱器１に対し、複
数台の冷凍機２を並列に配設して一つの冷却系を
構成する場合に、各冷凍機２の変流器を用いた電
流検出器３を設けた。図中４は放熱器１への冷水
流量を制御するメインバルブ、５はメインポン
プ、６は冷凍機ユニツト７内で各冷凍機２に連結
するポンプ、８，９は冷凍機２への冷水の入口及
び出口温度を検出する温度センサー、１０は同じ
く冷凍機ユニツト７内の還流用の制御バルブを示
す。 As shown in Figure 1, when multiple refrigerators 2 are arranged in parallel to one radiator 1 to form one cooling system, a current transformer for each refrigerator 2 is used. A current detector 3 was provided. In the figure, 4 is the main valve that controls the flow of cold water to the radiator 1, 5 is the main pump, 6 is the pump connected to each refrigerator 2 in the refrigerator unit 7, and 8 and 9 are the main valves that control the flow of cold water to the refrigerator 2. A temperature sensor 10 detects the inlet and outlet temperatures, and 10 also indicates a control valve for recirculation within the refrigerator unit 7.
このような空調用冷却機構において、まず、現
在１台のみの冷凍機を起動する場合、第４図のフ
ローチヤートに示すように前記電流検出器３を用
いた当該冷凍機２の負荷電流を計測し、これが定
格電流値例えば545(A)から安全率α1を引いた値よ
りも大きいか否かを判断する（ステツプイ）。大
きい場合、冷凍機の負荷が上昇傾向にあるか否か
を判断する（ステツプロ）。この判断は例えば第
１図に示す温度センサー８，９を用いて冷水の出
入口温度差が上昇傾向であるか否かにより、また
はカロリー計を用いて熱量（カロリー）により、
若しくは開度計を用いて冷凍機ベーン開度の傾向
により行う。上昇傾向にある場合、すなわち１台
目の冷凍機をフル運転してもなお冷房の必要があ
る場合にはじめて２台目の冷凍機２を起動する。 In such an air conditioning cooling mechanism, first, when starting only one refrigerator at present, the load current of the refrigerator 2 is measured using the current detector 3 as shown in the flowchart of FIG. Then, it is determined whether or not this value is larger than the rated current value, for example, 545 (A) minus the safety factor α 1 (step 1). If it is large, determine whether the load on the refrigerator is on the rise (STETSUPRO). This judgment can be made, for example, by using the temperature sensors 8 and 9 shown in FIG. 1 to determine whether the temperature difference between the inlet and outlet of the cold water is on the rise or not, or by determining the amount of heat (calories) by using a calorimeter.
Alternatively, check the trend of refrigerator vane opening using an opening gauge. The second refrigerator 2 is started only when there is an upward trend, that is, when there is still a need for cooling even after the first refrigerator is operated at full capacity.
次いで、前記ステツプイと同じように２台の内
入力大の冷凍機２の電流が545(A)−α1よりも大き
いか否かを判断し（ステツプハ）、小さい場合、
２台の冷凍機２の入力電流の平均が273(A)よりも
小さいか否かを判断する（ステツプニ）。小さい
場合、前記ステツプロと同じような方法で冷凍機
負荷が下降傾向にあるか否かを判断し、下降傾向
であれば冷房は充分足りているものとして１台の
冷凍機２を停止する。一方、前記のステツプハで
２台のうち入力が大きい方の冷凍機２の電流が
545(A)−α1よりも大きい場合、冷凍機負荷が上昇
傾向にあれば（ステツプヘ）、３台目の冷凍機２
を起動する。 Next, in the same way as in Step 1, it is determined whether the current of the two high-input refrigerators 2 is larger than 545 (A) - α 1 (Step 3), and if it is smaller,
It is determined whether the average input current of the two refrigerators 2 is smaller than 273 (A) (step 2). If it is smaller, it is determined whether or not the refrigerator load is on a downward trend using a method similar to the step procedure described above, and if it is on a downward trend, one refrigerator 2 is stopped, assuming that the cooling is sufficient. On the other hand, in the above step, the current of the refrigerator 2, which has the larger input of the two units, is
If larger than 545(A)-α 1 , if the chiller load is on the rise (go to step), the third chiller 2
Start.
以下、同様にして４台目の冷凍機２の投入も決
定され、例えば３台起動している状態から１台を
停止するか否かの決定は３台の冷凍機２の入力電
流の平均が327(A)以下か否かで行う。 Thereafter, it is decided to turn on the fourth refrigerator 2 in the same way, and for example, from a state where three refrigerators are running, it is decided whether to stop one refrigerator or not based on the average input current of the three refrigerators 2. 327(A) or less.
このように、例えば４台ある冷凍機の投入台数
を決定するに際し、第３図に示すように各冷凍機
の負荷が50〜100％の間にあるように制御すれば、
第２図に示すようにより少ない入力電力で効率の
よい運転をなすことができる。なお、いずれの場
合も冷凍機２の起動台数を減じて行くときの判断
は安全を見て起動時よりも約10％低い負荷率でて
行うものとした。 In this way, when determining the number of refrigerators to be used, for example, if there are four refrigerators, if the load of each refrigerator is controlled to be between 50% and 100% as shown in Figure 3,
As shown in FIG. 2, efficient operation can be achieved with less input power. In both cases, the decision to reduce the number of chillers 2 to be started was made at a load factor that was approximately 10% lower than at the time of starting, for safety reasons.
以上述べたように、本発明の空調用冷凍機の省
エネルギー運転制御方法は、一つの冷却系で複数
台の冷凍機を並列に設置した場合において、各冷
凍機に電流検出器を設け、各冷凍機の負荷状況を
この冷凍器の定格電流値における実際入力電流値
で判断して投入すべき冷凍機の運転台数を制御す
ることとしたので、カロリーをもとに制御を行つ
ていた場合と異なり、配管や熱交換器等装置部品
の経年変化に影響されることなく適確な制御をな
すことができるものである。 As described above, in the energy-saving operation control method for air conditioning refrigerators of the present invention, when multiple refrigerators are installed in parallel in one cooling system, each refrigerator is provided with a current detector, and each refrigerator is We decided to control the number of operating chillers that should be turned on by judging the load status of the chiller based on the actual input current value at the rated current value of the chiller, which is different from the case where control was performed based on calories. In contrast, it is possible to perform accurate control without being affected by aging of equipment components such as piping and heat exchangers.
第１図は本発明方法の実施例を示す配管説明
図、第２図は冷凍機の負荷特性を示すグラフ、第
３図は投入台数制御状態を示すグラフ、第４図は
実施例を示すフローチヤートである。
１……放熱器、２……冷凍機、３……電流検出
器、４……メインバルブ、５……メインポンプ、
６……ポンプ、７……冷凍機ユニツト、８，９…
…温度センサー、１０……バルブ。
Fig. 1 is a piping explanatory diagram showing an embodiment of the method of the present invention, Fig. 2 is a graph showing the load characteristics of the refrigerator, Fig. 3 is a graph showing the control state of the number of input units, and Fig. 4 is a flowchart showing the embodiment. It's a chat. 1... Heat sink, 2... Refrigerator, 3... Current detector, 4... Main valve, 5... Main pump,
6... Pump, 7... Refrigerator unit, 8, 9...
...Temperature sensor, 10...Valve.
Claims (1)
した場合において、各冷凍機に電流検出器を設
け、各冷凍機の負荷状況をこの冷凍器の定格電流
値における実際入力電流値で判断し、まず、第１
台目の冷凍機の入力電流が定格電流値から安全値
を引いた値よりも大きい場合で、かつ負荷が上昇
傾向にある場合は第２台目の冷凍機を起動し、こ
の２台の冷凍機の内、入力大な冷凍機の入力電流
が定格電流値から安全値を引いた値よりも大きい
場合で、かつ負荷が上昇傾向にある場合は第３台
目の冷凍機を起動し、一方、２台の冷凍機の内、
入力大な冷凍機の入力電流が定格電流値から安全
値を引いた値よりも小さい場合で、２台の冷凍機
の入力電流の平均が一定値以下の場合で、かつ負
荷が下降傾向にある場合はその内の１台を停止
し、以下同様に、第４台目の冷凍機の起動、もし
くは３台起動している冷凍機の内の１台の停止を
決定していくことを特徴とする空調用冷凍機の省
エネルギー運転制御方法。1 When multiple refrigerators are installed in parallel in one cooling system, each refrigerator is equipped with a current detector, and the load status of each refrigerator is determined based on the actual input current value at the rated current value of this refrigerator. First, the first
If the input current of the first refrigerator is greater than the rated current value minus the safety value and the load is increasing, the second refrigerator is started and If the input current of the refrigerator with the highest input is greater than the rated current value minus the safety value, and if the load is on the rise, start the third refrigerator, and , of the two refrigerators,
When the input current of a high-input refrigerator is smaller than the rated current value minus the safety value, when the average input current of two refrigerators is below a certain value, and when the load is on a downward trend. In this case, one of the three refrigerators is stopped, and in the same manner, the fourth refrigerator is started, or one of the three activated refrigerators is stopped. An energy-saving operation control method for air conditioning refrigerators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58168919A JPS6060474A (en) | 1983-09-13 | 1983-09-13 | Energy-conserving operation control system of refrigerator for air-conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58168919A JPS6060474A (en) | 1983-09-13 | 1983-09-13 | Energy-conserving operation control system of refrigerator for air-conditioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6060474A JPS6060474A (en) | 1985-04-08 |
| JPH0317052B2 true JPH0317052B2 (en) | 1991-03-07 |
Family
ID=15876984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58168919A Granted JPS6060474A (en) | 1983-09-13 | 1983-09-13 | Energy-conserving operation control system of refrigerator for air-conditioning |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6060474A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4523461B2 (en) * | 2005-03-10 | 2010-08-11 | 新日本空調株式会社 | Operation control method for 1-pump heat source equipment |
| JP5029913B2 (en) * | 2008-07-04 | 2012-09-19 | 株式会社日立プラントテクノロジー | Air conditioning system and control method thereof |
| JP6422710B2 (en) * | 2014-09-22 | 2018-11-14 | 株式会社日立製作所 | Operation control apparatus and operation control method for energy network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54147547A (en) * | 1978-05-10 | 1979-11-17 | Sanyo Electric Co Ltd | Temperature controlling capacity controller |
| JPS5522710A (en) * | 1978-08-04 | 1980-02-18 | Fujitsu Ltd | Photo semiconductor element package |
-
1983
- 1983-09-13 JP JP58168919A patent/JPS6060474A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6060474A (en) | 1985-04-08 |
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