JP3327445B2 - Operation control device and operation control method for heat storage air conditioning system - Google Patents
Operation control device and operation control method for heat storage air conditioning systemInfo
- Publication number
- JP3327445B2 JP3327445B2 JP21670395A JP21670395A JP3327445B2 JP 3327445 B2 JP3327445 B2 JP 3327445B2 JP 21670395 A JP21670395 A JP 21670395A JP 21670395 A JP21670395 A JP 21670395A JP 3327445 B2 JP3327445 B2 JP 3327445B2
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- heat
- air conditioning
- heat storage
- conditioning system
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、ビルの空調などに用い
る蓄熱空調システムの運転制御装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for a heat storage air conditioning system used for air conditioning of a building.
【０００２】[0002]
【従来の技術】近年、割安な夜間電力を利用して蓄熱槽
に潜熱あるいは顕熱を利用して蓄熱し、昼間に蓄熱した
熱量を使いながら空調運転を行う蓄熱空調システムの開
発が進んでいる。この場合、充分な省エネルギー効果を
得るには、前夜に蓄えた熱を翌日完全に使いきる必要が
ある。そのように蓄熱槽からの放熱を制御する技術の一
例として、特開昭６３−２５１７４３号に開示された技
術がある。これは、放熱速度が異なる複数の運転パター
ンを有する氷蓄熱空調システムにおいて、空調装置の運
転中に測定した蓄熱量と、予め設定した予測蓄熱量とを
常に比較し、負荷変動があった場合にはその変動に追従
するように運転モードを自動的に切り換えることによ
り、余剰蓄熱量の使い切りを可能にしたものである。2. Description of the Related Art In recent years, a heat storage air conditioning system which stores heat using latent heat or sensible heat in a heat storage tank using inexpensive nighttime electric power and performs air conditioning operation using the amount of heat stored during the day has been developed. . In this case, in order to obtain a sufficient energy saving effect, it is necessary to completely use up the heat stored the previous night the next day. As an example of such a technique for controlling the heat radiation from the heat storage tank, there is a technique disclosed in JP-A-63-251743. This is because, in an ice thermal storage air conditioning system having a plurality of operation patterns with different heat radiation rates, the amount of heat storage measured during operation of the air conditioner is always compared with a preset predicted amount of heat storage, and when there is a load change. The present embodiment automatically switches the operation mode so as to follow the fluctuation, thereby enabling the surplus heat storage to be used up.
【０００３】[0003]
【発明が解決しようとする課題】ところで、蓄熱槽にお
いては、図５に示すように、出口温度を一定としたとき
に取り出せる単位時間当たりの放熱量（放熱可能量）は
蓄熱量により異なる。従って、放熱特性を一定として単
に蓄熱槽の出口温度だけを考慮して放熱制御を行ったの
では適正な放熱制御が行えず、そのため、熱源機優先モ
ード運転時に空調負荷が小さい場合には、空調終了時に
蓄熱が無駄に残ってしまう恐れがある。そこで、本発明
は、蓄熱空調システムの制御をよりきめ細かく行って、
無駄に蓄熱が残ることがないように蓄熱量を適切に取り
出すことを目的とする。As shown in FIG. 5, in the heat storage tank, the amount of heat released per unit time (amount of heat that can be released) when the outlet temperature is constant varies depending on the amount of heat stored. Therefore, if the heat radiation control is performed by simply considering the outlet temperature of the heat storage tank while keeping the heat radiation characteristics constant, appropriate heat radiation control cannot be performed. There is a risk that heat storage will be wasted at the end. Therefore, the present invention provides a finer control of the heat storage air conditioning system,
An object of the present invention is to appropriately extract a heat storage amount so that heat storage does not remain unnecessarily.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
の請求項１に記載の発明は、蓄熱槽と熱源機とを有する
蓄熱空調システムと、夜間に熱源機を運転して蓄熱し、
昼間にこの蓄熱を消費して空調を行うように上記蓄熱空
調システムを制御する制御装置とを有する蓄熱空調シス
テムの運転制御装置において、上記制御装置は、蓄熱槽
の残蓄熱量に依存する放熱特性を加味して推定放熱可能
量を算出し、これと予測空調負荷とを比較し、これに基
づいて蓄熱空調システムの最適な運転モードを自動的に
選択することを特徴とする蓄熱空調システムの運転制御
装置である。According to a first aspect of the present invention, there is provided a heat storage air conditioning system having a heat storage tank and a heat source device, and a heat source device that is operated at night to store heat.
A control device for controlling the heat storage air conditioning system so as to perform air conditioning by consuming the heat in the daytime, wherein the control device has a heat radiation characteristic dependent on the remaining heat storage amount of the heat storage tank. The operation of the thermal storage air-conditioning system is characterized in that the estimated heat-dissipable amount is calculated in consideration of the above, the predicted thermal conditioning load is compared with this, and the optimal operation mode of the thermal storage air-conditioning system is automatically selected based on this. It is a control device.
【０００５】このような制御は、空調運転が開始してか
ら任意の時刻に開始することができるが、よりきめ細か
い制御を行なうためには、運転開始直後から行なうのが
望ましい。またその時間間隔も任意であるが、３０分〜
１時間に１回で充分である。 [0005] Such control can be started at an arbitrary time after the start of the air-conditioning operation. However, in order to perform more detailed control, it is desirable to perform the control immediately after the start of the operation. The time interval is also arbitrary, but 30 minutes to
Ru enough der at once an hour.
【０００６】請求項２に記載の発明は、運転モードとし
て熱源機より放熱運転を優先的に運転する放熱優先モー
ドと放熱運転より熱源機を優先的に運転する熱源機優先
モードの少なくとも２つを有することを特徴とする請求
項１に記載の蓄熱空調システムの運転制御装置である。
請求項３に記載の発明は、上記の比較判断を繰り返し行
なうことを特徴とする請求項１又は２に記載の蓄熱空調
システムの運転制御装置である。請求項４に記載の発明
は、上記の比較判断をある設定時刻以降に行なうことを
特徴とする請求項１ないし３のいずれかに記載の蓄熱空
調システムの運転制御装置である。設定時刻は、空調が
行われる施設の条件に応じて適宜に選択され、例えば冷
房負荷が大幅に減少する終業時刻などが採用される。According to a second aspect of the present invention, at least two operation modes are provided: a heat-dissipation priority mode in which the heat-dissipation operation is preferentially performed by the heat-source device, and a heat-source-device priority mode in which the heat source device is preferentially operated by the heat-dissipation operation. The operation control device for a heat storage air conditioning system according to claim 1, wherein the operation control device has:
According to a third aspect of the present invention, there is provided the operation control device of the thermal storage air conditioning system according to the first or second aspect, wherein the comparison is repeatedly performed. The invention according to claim 4 is the operation control device for a heat storage air conditioning system according to any one of claims 1 to 3 , wherein the comparison determination is performed after a certain set time. The set time is appropriately selected according to the condition of the facility where the air conditioning is performed. For example, a closing time when the cooling load is significantly reduced is adopted.
【０００７】請求項５に記載の発明は、夜間に熱源機を
運転して蓄熱槽に蓄熱し、昼間にこの蓄熱を消費して空
調を行うように蓄熱空調システムを制御する蓄熱空調シ
ステムの運転制御方法において、蓄熱槽の残蓄熱量に依
存する放熱特性を加味して推定放熱可能量を算出し、こ
れと予め記憶された予測空調負荷とを比較し、これに基
づいて蓄熱空調システムの最適な運転モードを選択する
工程を有することを特徴とする蓄熱空調システムの運転
制御方法である。According to a fifth aspect of the present invention, there is provided an operation of a heat storage air conditioning system for controlling a heat storage air conditioning system to operate a heat source unit at night to store heat in a heat storage tank and to consume the heat during daytime to perform air conditioning. In the control method, it depends on the amount of heat stored in the heat storage tank.
Calculating the estimated amount of heat dissipable in consideration of the existing heat radiation characteristics, comparing the estimated heat dissipable amount with a predicted air conditioning load stored in advance, and selecting an optimal operation mode of the heat storage air conditioning system based on the calculated heat dissipation amount. The operation control method of the heat storage air conditioning system described above.
【０００８】[0008]
【作用】この発明においては、蓄熱槽の例えば残蓄熱量
に依存する放熱特性を加味して推定放熱可能量を算出
し、これと予測空調負荷とを比較し、これに基づいて蓄
熱空調システムの最適な運転モードを自動的に選択する
ので、蓄熱槽の放熱特性を考慮したよりきめ細かい運転
制御が行われる。According to the present invention, the estimated amount of heat dissipated is calculated by taking into account, for example, the heat radiation characteristics of the heat storage tank that depends on the residual heat storage amount, and this is compared with the predicted air conditioning load. Since the optimum operation mode is automatically selected, more detailed operation control is performed in consideration of the heat radiation characteristics of the heat storage tank.
【０００９】従って、例えば事務所などの終業時刻以降
において冷房負荷が急減するときでも、現状の残蓄量か
ら蓄熱槽の放熱特性を加味して算出した単位時間当たり
の放熱できる熱量（放熱可能量）と、熱負荷予測から算
出した現時刻から１時間の冷房負荷（予測冷房負荷）と
を比較し、現状の残蓄量で今後１時間の冷房負荷を賄え
ると判断された場合には、運転モードを放熱優先モード
に自動的に切り換えて、無駄に蓄熱が残らないようにす
る。Therefore, for example, even when the cooling load suddenly decreases after the closing time of an office or the like, the amount of heat that can be radiated per unit time (the amount of heat that can be radiated) calculated from the current remaining amount by taking into account the heat radiation characteristics of the heat storage tank. ) Is compared with the cooling load for one hour from the current time calculated from the heat load prediction (predicted cooling load). If it is determined that the current remaining amount can cover the cooling load for the next hour, the operation is started. The mode is automatically switched to the heat dissipation priority mode so that no waste heat is stored.
【００１０】[0010]
【実施例】図１は、本発明の一実施例の氷蓄熱空調シス
テムＳを示すものである。本システムの構成は、大きく
分けてブライン系と水系に分かれる。ブライン系は主に
蓄熱槽１、主熱源機（冷凍機）２、主熱源機にブライン
を循環させるためのブラインポンプ３、蓄熱槽からの放
熱運転を行うための放熱用ブラインポンプ４，５及び温
度調整を行うための三方弁６で構成されている。水系
は、補助熱源機（冷却機）７，８、補助熱源機に水を循
環させるための冷水ポンプ９，１０で構成されている。
また、放熱運転及び主熱源機の追いかけ運転時に、水と
ブラインを熱交換するための水−ブライン熱交換機１
１，１２、水−ブライン熱交換機に水を循環させるため
の２次側熱交ポンプ１３，１４で構成されている。FIG. 1 shows an ice storage air conditioning system S according to an embodiment of the present invention. The configuration of this system can be broadly divided into brine and water systems. The brine system mainly includes a heat storage tank 1, a main heat source unit (refrigerator) 2, a brine pump 3 for circulating brine to the main heat source unit, heat radiation brine pumps 4 and 5 for performing a heat radiation operation from the heat storage tank, and It comprises a three-way valve 6 for adjusting the temperature. The water system includes auxiliary heat source devices (coolers) 7 and 8 and cold water pumps 9 and 10 for circulating water to the auxiliary heat source devices.
A water-brine heat exchanger 1 for exchanging heat between water and brine during the heat dissipation operation and the chase operation of the main heat source unit.
1, 12 and secondary heat exchange pumps 13 and 14 for circulating water through the water-brine heat exchanger.
【００１１】図２は、氷蓄熱空調システムＳの制御装置
の構成を示すもので、各種データの記憶及び演算を行う
ためのパーソナルコンピュータ２１と、検出装置２２、
２３からなっている。FIG. 2 shows the configuration of a control device of the ice regenerative air conditioning system S. A personal computer 21 for storing and calculating various data, a detecting device 22,
23.
【００１２】この氷蓄熱槽１は内融式と呼ばれるもので
あり、図３に示すように蓄熱時は熱交換器１１，１２内
の水２４に囲まれたチューブ２５内に冷たいブライン２
６を流すことにより、チューブ２５の外表面に氷２７を
生成し、放熱時はチューブ２５内に温かいブライン２６
を流すことによりチューブ２５外表面の氷２７を融解す
るものである。氷蓄熱槽１には、現状の残蓄量を検出す
るための残蓄量検出装置２２及び温度検出装置２３が設
けられ、これらの出力端子はパソコン２１に接続されて
いる。The ice heat storage tank 1 is of the so-called internal melting type, and as shown in FIG. 3, when storing heat, a cold brine 2 is placed in a tube 25 surrounded by water 24 in the heat exchangers 11 and 12.
6, ice 27 is generated on the outer surface of the tube 25, and a warm brine 26
To melt the ice 27 on the outer surface of the tube 25. The ice storage tank 1 is provided with a remaining storage amount detection device 22 and a temperature detection device 23 for detecting the current remaining storage amount, and their output terminals are connected to a personal computer 21.
【００１３】パソコン２１には、キーボード部３０から
入力された制御開始時刻を記憶する開始時刻記憶部３
１、気象条件や過去の蓄積データなどを基に熱負荷予測
を行う熱負荷予測部３２、熱負荷予測部３２の結果に基
づいて単位時間当たりの予測空調負荷を算出する予測空
調負荷算出部３３、氷蓄熱槽の放熱特性を記憶する氷蓄
熱槽放熱特性記憶部３４、残蓄量及び氷蓄熱槽の放熱特
性から単位時間当たりの放熱量を算出する放熱可能量算
出部３５、複数の運転モードを記憶するための運転モー
ド記憶部３６、放熱可能量と予測空調負荷との比較判断
から運転モードを決定する運転モード判断部３７を備え
ている。運転モード記憶部３６に記憶されている運転モ
ードは、この実施例では、図４に示すように、冷凍機よ
り氷放熱を優先的に運転する氷放熱優先モード及び氷放
熱より冷凍機を優先的に運転する冷凍機優先モードがあ
る。The personal computer 21 has a start time storage unit 3 for storing the control start time inputted from the keyboard unit 30.
1. A heat load prediction unit 32 for predicting a heat load based on weather conditions and past accumulated data, and a predicted air conditioning load calculation unit 33 for calculating a predicted air conditioning load per unit time based on the result of the heat load prediction unit 32. An ice heat storage tank heat dissipation characteristic storage unit 34 for storing heat dissipation characteristics of the ice heat storage tank; a heat dissipable amount calculation unit 35 for calculating a heat dissipation amount per unit time from the remaining storage amount and the heat dissipation characteristics of the ice heat storage tank; And an operation mode determination unit 37 that determines an operation mode based on a comparison between the heat release amount and the predicted air conditioning load. In this embodiment, the operation modes stored in the operation mode storage unit 36 are, as shown in FIG. 4, the ice heat radiation priority mode in which the ice heat radiation is operated preferentially over the refrigerator, and the refrigerator is preferentially operated over the ice heat radiation. There is a refrigerator priority mode that operates in
【００１４】本発明の特徴は放熱制御を行う際、氷放熱
槽放熱特性記憶部３４に記憶された蓄熱槽の放熱特性を
用いることである。以下に、その放熱特性を加味した単
位時間当たりの放熱可能量の算出方法について説明す
る。氷蓄熱槽の交換熱量〔Ｑ〕は次の式で表わされる。 ここにおいて、 Ｕ：熱通過率（kcal／ｍ2 ・ｈ・
℃） Ａ：氷蓄熱槽内熱交換器の伝熱面積（外表面積）
（ｍ2 ） ΔＴ：対数平均温度差（℃） Ｔ0 ：槽内温度（℃） Ｔ1 ：ブライン入口温度（℃） Ｔ2 ：ブライン出口温度（℃） ここで、Ａはチューブの外径及び長さから、またＴ0 ，
Ｔ1 ，Ｔ2 は測温抵抗体から容易に求めることができ
る。従って、熱通過率Ｕを算出することにより、氷蓄熱
槽の交換熱量、つまり放熱可能量を算出できる。A feature of the present invention is that when performing heat radiation control, the heat radiation characteristics of the heat storage tank stored in the ice radiation tank heat radiation characteristic storage unit 34 are used. Hereinafter, a method of calculating the heat radiating amount per unit time in consideration of the heat radiating characteristic will be described. The exchange heat quantity [Q] of the ice storage tank is represented by the following equation. Here, U: heat transmission rate (kcal / m 2 · h ·
℃) A: Heat transfer area (external surface area) of heat exchanger in ice storage tank
(M 2 ) ΔT: logarithmic average temperature difference (° C.) T 0 : temperature in tank (° C.) T 1 : brine inlet temperature (° C.) T 2 : brine outlet temperature (° C.) where A is the outer diameter of the tube and From the length, again T 0 ,
T 1 and T 2 can be easily obtained from the resistance temperature detector. Therefore, by calculating the heat transmission rate U, the amount of exchanged heat of the ice heat storage tank, that is, the amount of heat that can be released can be calculated.
【００１５】次に、熱通過率Ｕの算出方法について説明
する。熱通過率Ｕは、一般的に次式で表わされる。 αi ：管内（ブライン側）熱伝達率（kcal／ｍ2 ・ｈ・
℃） α0 ：管外（水側）熱伝達率（kcal／ｍ2 ・ｈ・℃） Ｄi ：チューブ内径（ｍ） Ｄ0 ：チューブ外径（ｍ） Ｒt ：伝熱管抵抗 （kcal／ｍ2 ・ｈ・℃） Ｒs ：スケール係数（kcal／ｍ2 ・ｈ・℃） ここで、Ｄi ，Ｄ0 ，Ｒt ，Ｒs は定数、αi も使用範
囲内では変化は微小であり一定とする。従って、α0 を
算出できれば氷蓄熱槽の熱通過率Ｕを算出できる。Next, a method of calculating the heat transmittance U will be described. The heat transmission rate U is generally represented by the following equation. α i : heat transfer coefficient in pipe (brine side) (kcal / m 2 · h ·
° C) α 0 : Heat transfer coefficient outside the tube (water side) (kcal / m 2 · h · ° C) Di : Tube inner diameter (m) D 0 : Tube outer diameter (m) R t : Heat transfer tube resistance (kcal / m 2 · h · ° C.) R s : scale factor (kcal / m 2 · h · ° C.) Here, Di , D 0 , R t , and R s are constants, and α i also has a small change within the use range. It is constant. Therefore, if α 0 can be calculated, the heat transfer rate U of the ice heat storage tank can be calculated.
【００１６】次に、管外（水側）熱伝達率α0 の算出方
法について説明する。氷とチューブ表面との間は自然対
流伝熱であるが、４℃で比重に極値を持つ水は、その近
傍では自然対流であり、非常に特殊なものとなる。従っ
て、管外（水側）熱伝達率α0 を一般的に求めるのは難
しいが、この発明では以下の方法を採用する。Next, a method of calculating the out-of-pipe (water-side) heat transfer coefficient α 0 will be described. Although natural convection heat transfer occurs between the ice and the tube surface, water having an extreme value of specific gravity at 4 ° C. has a natural convection in the vicinity thereof and is very special. Therefore, it is generally difficult to find the heat transfer coefficient α 0 outside the tube (water side), but the present invention employs the following method.
【００１７】管外熱伝達率α0 は、一般的にチューブ管
壁の表面積、熱流束、ブライン温度・チューブ管外まわ
り温度分布に関係してくる。ここでは最大氷蓄熱量（満
蓄量）Ｑ0 を基準にし、蓄熱量（残蓄量）Ｑr との比率
で氷蓄熱率Ｐf を定義（Ｐf＝Ｑr ／Ｑ0 ）し、チュー
ブ管壁と氷の間の距離の代わりにこの氷蓄熱率Ｐf を用
いる。そこで、熱伝達率α0 を次の実験式に示すよう
に、Ｐf，Ｔ1−Ｔ0 ，Ｔ2 −Ｔ0 の関数で表わす。 α0 ＝ｆ（Ｐf ，Ｔ1 −Ｔ0 ，Ｔ2 −Ｔ0 ） このように、熱伝達率α0 は、残蓄量Ｑr 、槽内温度Ｔ
0 、ブライン入口温度Ｔ1、ブライン出口温度Ｔ2 の関
数であるので、前述の４つパラメータを算出すれば、氷
蓄熱の交換熱量つまり放熱可能量を算出することができ
る。これにより、図５に示すようなグラフが算出され
る。The heat transfer coefficient α 0 outside the tube is generally related to the surface area of the tube wall, heat flux, brine temperature, and temperature distribution around the tube tube. Here, based on the maximum ice heat storage amount (full storage amount) Q 0 , the ice heat storage rate P f is defined by the ratio with the heat storage amount (remaining storage amount) Q r (P f = Q r / Q 0 ), and the tube This ice heat storage rate Pf is used instead of the distance between the tube wall and ice. Therefore, the heat transfer coefficient α 0 is represented by a function of P f , T 1 −T 0 , and T 2 −T 0 as shown in the following empirical formula. α 0 = f (P f , T 1 −T 0 , T 2 −T 0 ) Thus, the heat transfer coefficient α 0 is determined by the residual amount Q r and the tank temperature T
0 , since it is a function of the brine inlet temperature T 1 and the brine outlet temperature T 2 , if the above four parameters are calculated, it is possible to calculate the amount of heat exchanged with ice heat storage, that is, the amount of heat that can be released. Thereby, a graph as shown in FIG. 5 is calculated.
【００１８】次に、図６に示す制御フロー図を参照しつ
つ、上記の氷蓄熱式空調システムの運転制御装置の作用
を説明する。予めキーボード部３０から、制御開始時刻
を入力しておき、制御開始時刻記憶部３１に記憶する
（ステップ１）。制御開始時刻は、運転の開始時刻と同
じでも良く、夕方など冷房負荷が急減する時刻（例え
ば、営業所や事務所の終業時刻である１８時）にしても
よい。制御開始時刻は更新されない限り同じである。Next, the operation of the operation control device of the above-mentioned ice regenerative air conditioning system will be described with reference to a control flow chart shown in FIG. The control start time is input in advance from the keyboard unit 30 and stored in the control start time storage unit 31 (step 1). The control start time may be the same as the operation start time, or may be the time when the cooling load suddenly decreases, such as in the evening (for example, 18:00 which is the closing time of the office or office). The control start time is the same unless updated.
【００１９】制御開始時刻を判断し（ステップ２）、残
蓄量検出装置２２にて氷蓄熱空調システムＳからの蓄熱
槽水位レベル信号より現状の残蓄量を検出し（ステップ
３）、温度検出装置２３にてブライン出入口温度及び槽
内温度を算出する（ステップ４）。放熱可能量算出部３
５において、上記の残蓄量、ブライン２６出入口温度及
び槽内温度から、氷蓄熱槽放熱特性記憶部３４に記憶さ
れている氷蓄熱槽１の放熱特性を加味して、つまり、上
述した式に基づいて放熱可能量を算出する（ステップ
５）。The control start time is determined (step 2), and the remaining amount detection device 22 detects the current remaining amount from the heat storage tank water level signal from the ice storage air conditioning system S (step 3), and detects the temperature. The brine inlet / outlet temperature and the tank temperature are calculated by the device 23 (step 4). Heat dissipation amount calculation unit 3
5, the heat storage characteristics of the ice heat storage tank 1 stored in the ice heat storage tank heat release characteristic storage unit 34 are added to the remaining storage amount, the brine 26 inlet / outlet temperature, and the tank temperature, that is, The heat radiable amount is calculated based on the calculated value (step 5).
【００２０】一方、熱負荷予測部３２において、気象条
件や過去の蓄積データなどを基に熱負荷予測を行い、予
測空調負荷算出部３３では熱負荷予測部３２の結果に基
づいて現時刻から次の蓄熱開始時刻までの予測空調負荷
を算出する（ステップ６）。そして、運転モード判断部
３７にて、上記で算出した放熱可能量（ａ）と予測空調
負荷（ｂ）とを比較して（ステップ７）、運転モード記
憶部３６に記憶されている運転モードの中から最適な運
転モードを選択する（ステップ８，９）。すなわち、 （ａ）＞（ｂ） ならば 氷放熱優先モード （ａ）＜（ｂ） ならば 冷凍機優先モード を選択する。選択された運転モードは氷蓄熱空調システ
ム１へ出力される。以上の制御は制御開始時刻から蓄熱
開始時刻まで一定時間毎に行われる。On the other hand, a heat load prediction unit 32 predicts a heat load based on weather conditions, past accumulated data, and the like, and a predicted air conditioning load calculation unit 33 calculates the next time from the current time based on the result of the heat load prediction unit 32. The predicted air conditioning load up to the heat storage start time is calculated (step 6). Then, the operation mode determination unit 37 compares the heat dissipation amount (a) calculated above with the predicted air conditioning load (b) (step 7), and determines the operation mode stored in the operation mode storage unit 36. An optimal operation mode is selected from among them (steps 8 and 9). That is, if (a)> (b), the ice heat radiation priority mode is selected, and if (a) <(b), the refrigerator priority mode is selected. The selected operation mode is output to the ice storage air conditioning system 1. The above control is performed at regular intervals from the control start time to the heat storage start time.
【００２１】図７は本発明の効果を説明するものであ
る。本発明による制御を行わなかった場合には、図９に
示すように、急激に負荷がなくなったときでも冷凍機が
優先的に運転され、蓄熱量が残ってしまう。一方、本発
明による制御を行った場合には、図７に示すように、負
荷変動に合わせて運転モードを切り換えることにより蓄
熱を適切に取り出すことができる。図８は、より簡単な
制御方法として、営業所や事務所の終業時刻である１８
時を制御開始時刻とした場合を示している。FIG. 7 illustrates the effect of the present invention. When the control according to the present invention is not performed, as shown in FIG. 9, even when the load suddenly disappears, the refrigerator is operated preferentially, and the heat storage amount remains. On the other hand, when the control according to the present invention is performed, heat storage can be appropriately taken out by switching the operation mode in accordance with the load fluctuation, as shown in FIG. FIG. 8 shows a simpler control method which is the closing time of a business office or office.
The case where time is set as the control start time is shown.
【００２２】尚、本発明が適用する空調システムは、氷
蓄熱空調システムのみならず、０℃以上あるいは以下で
凝固する蓄熱媒体による潜熱を利用したもの、あるいは
冷水蓄熱や温水蓄熱等の顕熱を利用したもの等の任意の
蓄熱空調システムに対して適用可能である。The air conditioning system to which the present invention is applied is not only an ice storage air conditioning system but also a system utilizing latent heat of a heat storage medium which solidifies at or above 0 ° C., or a sensible heat such as cold water heat storage or hot water heat storage. It can be applied to any heat storage air conditioning system such as the one used.
【００２３】[0023]
【発明の効果】本発明によれば、残蓄量、ブライン出入
口温度、槽内温度等の条件に加え、蓄熱槽の放熱特性を
も考慮して算出される放熱可能量と、熱負荷予測から算
出される予想空調負荷とを比較判断し、自動的に適切な
運転モードに切り換えることにより、蓄熱量を適切に取
り出すので、氷蓄熱空調システムをよりきめ細かく制御
して、蓄熱を有効に活用した空調システムを構築するこ
とができ、空調設備のランニングコストを大幅に軽減す
ることができる。According to the present invention, in addition to conditions such as the remaining storage amount, the temperature of the brine inlet / outlet, the temperature in the tank, etc., the heat release amount calculated in consideration of the heat release characteristics of the heat storage tank and the heat load prediction, By comparing and judging the calculated expected air-conditioning load and automatically switching to an appropriate operation mode, the amount of heat storage is taken out appropriately, so that the ice storage air-conditioning system can be controlled more finely and the heat storage can be used effectively. A system can be constructed, and the running cost of the air conditioning equipment can be significantly reduced.
【図１】この発明の一実施例の蓄熱システムの全体構成
を示すブロック図である。FIG. 1 is a block diagram showing an overall configuration of a heat storage system according to an embodiment of the present invention.
【図２】この発明の一実施例の蓄熱システムの制御装置
の全体構成を示すブロック図である。FIG. 2 is a block diagram showing an overall configuration of a control device of the heat storage system according to one embodiment of the present invention.
【図３】氷蓄熱槽の要部の構造を示す断面図である。FIG. 3 is a sectional view showing a structure of a main part of the ice heat storage tank.
【図４】本発明の一実施例の運転制御装置における運転
モードを示すグラフである。FIG. 4 is a graph showing an operation mode in the operation control device according to one embodiment of the present invention.
【図５】蓄熱量と放熱可能量の関係を示すグラフであ
る。FIG. 5 is a graph showing a relationship between a heat storage amount and a heat release amount.
【図６】運転制御装置の制御のフロー図である。FIG. 6 is a flowchart of control of the operation control device.
【図７】本発明による運転制御装置の効果を示すグラフ
である。FIG. 7 is a graph showing the effect of the operation control device according to the present invention.
【図８】本発明による運転制御装置の効果を示すグラフ
である。FIG. 8 is a graph showing the effect of the operation control device according to the present invention.
【図９】従来の運転制御装置の効果を示すグラフであ
る。FIG. 9 is a graph showing the effect of the conventional operation control device.
Ｓ 氷蓄熱空調システム １ 蓄熱槽 ２３ 制御装置（パソコン） ３３ 予測空調負荷部 ３５ 放熱可能量算出部 ３７ 運転モード判断部 S Ice storage air-conditioning system 1 Heat storage tank 23 Control device (PC) 33 Predicted air-conditioning load unit 35 Heat dissipation possible amount calculation unit 37 Operation mode determination unit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大澤 亙 東京都港区六本木一丁目４番33号 株式 会社 エヌ・ティ・ティ ファシリティ ーズ内 (72)発明者 牧田 昇 東京都大田区羽田旭町11番１号 株式会 社 荏原製作所内 (72)発明者 古谷 光輝 東京都大田区羽田旭町11番１号 株式会 社 荏原製作所内 (56)参考文献 特開 平３−59336（ＪＰ，Ａ) 特開 平５−172383（ＪＰ，Ａ) 特開 昭63−251743（ＪＰ，Ａ) 特開 昭61−289251（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F24F 11/02 102 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Wataru Osawa 1-4-3 Roppongi, Minato-ku, Tokyo Inside NTT Facilities Co., Ltd. (72) Inventor Noboru Makita Asahimachi Haneda, Ota-ku, Tokyo No. 11 in Ebara Corporation (72) Inventor Mitsuteru Furuya 11-1 in Haneda Asahimachi, Ota-ku, Tokyo Inside Ebara Corporation (56) References JP-A-3-59336 (JP, A) JP-A-5-172383 (JP, A) JP-A-63-251743 (JP, A) JP-A-61-289251 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) F24F 11/02 102
Claims (5)
テムと、 夜間に熱源機を運転して蓄熱し、昼間にこの蓄熱を消費
して空調を行うように上記蓄熱空調システムを制御する
制御装置とを有する蓄熱空調システムの運転制御装置に
おいて、 上記制御装置は、蓄熱槽の残蓄熱量に依存する放熱特性
を加味して推定放熱可能量を算出し、これと予め記憶さ
れた予測空調負荷とを比較し、これに基づいて蓄熱空調
システムの最適な運転モードを自動的に選択することを
特徴とする蓄熱空調システムの運転制御装置。1. A heat storage air conditioning system having a heat storage tank and a heat source device, and a control for controlling the heat storage air conditioning system to operate the heat source device at night to store heat and to consume the heat during daytime to perform air conditioning. An operation control device for a heat storage air conditioning system having a device, wherein the control device calculates an estimated possible heat release amount in consideration of a heat release characteristic depending on a residual heat storage amount of the heat storage tank, and calculates the estimated heat release amount and a predicted air conditioning load stored in advance. And automatically selecting an optimum operation mode of the heat storage air conditioning system based on the comparison.
優先的に運転する放熱優先モードと放熱運転より熱源機
を優先的に運転する熱源機優先モードの少なくとも２つ
を有することを特徴とする請求項１に記載の蓄熱空調シ
ステムの運転制御装置。2. The operation mode includes at least two of a heat-dissipation priority mode in which the heat-dissipation operation is preferentially operated over the heat-source device and a heat-source-device priority mode in which the heat source device is preferentially operated over the heat-dissipation operation. Item 2. An operation control device for a heat storage air conditioning system according to item 1 .
特徴とする請求項１又は２に記載の蓄熱空調システムの
運転制御装置。3. A driving control device for a heat storage air conditioning system according to claim 1 or 2, characterized in repeating the aforementioned comparison judgment.
なうことを特徴とする請求項１ないし３のいずれかに記
載の蓄熱空調システムの運転制御装置。4. The operation control apparatus of the heat storage air conditioning system according to any one of 3 claims 1 and performing after a set time in the comparison judgment.
し、昼間にこの蓄熱を消費して空調を行うように蓄熱空
調システムを制御する蓄熱空調システムの運転制御方法
において、 蓄熱槽の残蓄熱量に依存する放熱特性を加味して推定放
熱可能量を算出し、これと予め記憶された予測空調負荷
とを比較し、これに基づいて蓄熱空調システムの最適な
運転モードを選択する工程を有することを特徴とする蓄
熱空調システムの運転制御方法。5. An operation control method for a heat storage air conditioning system for controlling a heat storage air conditioning system to operate a heat source device at night to store heat in a heat storage tank and to consume the heat during daytime to perform air conditioning. A step of calculating an estimated radiable amount in consideration of a heat radiation characteristic depending on a remaining heat storage amount, comparing the estimated heat release amount with a predicted air conditioning load stored in advance, and selecting an optimal operation mode of the heat storage air conditioning system based on the calculated heat release amount; An operation control method for a heat storage air conditioning system, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21670395A JP3327445B2 (en) | 1995-08-02 | 1995-08-02 | Operation control device and operation control method for heat storage air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21670395A JP3327445B2 (en) | 1995-08-02 | 1995-08-02 | Operation control device and operation control method for heat storage air conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0942740A JPH0942740A (en) | 1997-02-14 |
| JP3327445B2 true JP3327445B2 (en) | 2002-09-24 |
Family
ID=16692604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21670395A Expired - Lifetime JP3327445B2 (en) | 1995-08-02 | 1995-08-02 | Operation control device and operation control method for heat storage air conditioning system |
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| Country | Link |
|---|---|
| JP (1) | JP3327445B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5975253B2 (en) * | 2011-12-15 | 2016-08-23 | 清水建設株式会社 | Air conditioning operation control system |
| CN108361885B (en) * | 2018-01-30 | 2021-02-05 | 深圳市奥宇节能技术股份有限公司 | Dynamic planning method for ice storage air conditioning system |
-
1995
- 1995-08-02 JP JP21670395A patent/JP3327445B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JPH0942740A (en) | 1997-02-14 |
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