JP2000258006A - Apparatus and method for controlling operation of ice storage cooling and refrigerating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an efficiency of a cooling and refrigerating system and to realize comfortable cooling, by predicting an atmospheric temperature during operating from detected results of an atmospheric temperature, a humidity and a solar radiation amount, calculating an air conditioning load, and calculating a transfer time from an operation stop to a peak cutting operation. SOLUTION: Detected values T1, U and S of atmospheric temperature detector 1, humidity detector 4 and solar radiation amount detector 3 are inputted every time. A predicted value T5 of an atmospheric temperature in the daytime is calculated by a simulation to obtain an air conditioning load L, and a thermal storage operating time, a peak cutting operation time and a radiation complete target time are set. A cooler chasing operation stopping time ts calculated from the load L, an atmospheric temperature T1 and the like, is inputted to a cooler control operating unit 42, the chasing operation is stopped, and then a peak cutting operation is continued for a given time. Thus, the chasing operation can be executed only for a necessary time by accurately following to the load L and the atmospheric state. Then, a wasteful operation and power dissipation are avoided, and a decrease in comfortableness in an excess cooling can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control method and an apparatus for each operation period in a cooling / refrigeration system having an ice heat storage tank.

[0002]

2. Description of the Related Art A cooling / refrigeration system using a heat storage tank is introduced in order to balance heat supply and reception, and the number of energy supply facilities corresponding to peak heat demand is reduced, and a load point or a high energy generation efficiency is reduced. It enables the operation of energy supply equipment during energy cost hours. In the cooling / refrigerating apparatus, an ice heat storage tank using water or brine as a heat storage medium is used as a heat storage tank in order to enhance a quantitative / time gap adjustment in heat energy reception, which is a basic function of the heat storage tank. .

[0003] In operating such an ice storage cooling / refrigeration system, conventionally, a time indicating the operation state of the cooling device is set in a time table, and during a peak period of power demand and a time period when the load is usually small, the cooling device is operated. The operation is stopped, and the vehicle is operated at a time when electric power is low at night. That is, FIGS. 3 and 4 are operation time tables of the ice storage cooling / refrigeration system. FIG. 3 shows the midsummer season from the beginning of July to the end of September, and FIG. The axis is the operating time, and the vertical axis is the refrigeration load.

[0004] In midsummer shown in FIG. 3, t ₁ is the start time of the thermal storage operation by the ice thermal storage tank, t ₂ starts radiating operation, cooling operation ends the thermal storage operation, also driving a cooling device additionally time to start hanging operation, t ₅ the end time of the radiating operation, t ₃ is the in radiating operation, the time for stopping the additionally multiplied operation of the cooling device (or time to start peak-cut operation), t ₄ is the peak This is the time to end the cut operation and restart the follow-up operation of the cooling device. Usually, the thermal storage operation period (night) is a 10 hours from 22 o'clock _{t 1} is the previous day until _{t 2} is 8, approximately at _{t 5} is 19, the peak cut time zone, _{t 3} from 13:00 , Time to restart the cooling device t
₄ is set to 10 hours until 16:00.

In the intermediate period shown in FIG. 4, t ₁ and t ₂ are the start and end times of the heat storage operation and t ₆
Start time of the radiating operation, the time t ₇ is to move to finished cooling apparatus operated radiating operation, t ₈ is the time to end the cooling device operation, usually set at about at the t _{8 =} 19 I have.

Conventionally, in such an ice storage cooling / refrigeration system, the operation period is divided into two periods of the midsummer period and other intermediate periods as described above, and the heat storage operation time (t
₁ ~t ₂₎ cooling device radiating operation (cooling operation including additionally hanging operation) time (t 2 _{~t 5)} and in the radiating operation period, the cooling device peak cut operation time for the peak-cut operation to stop the add hanging operation _(t 3 _~t 4), and thermal storage operation time in the interim period _(t 1 _~t 2), radiating operation time _(t 6 ~
t _7), the time to start the operation of the cooling device to stop the radiating operation of the _(t 7 _{~t 8),} are set in advance prior.

[0007]

Therefore, in the prior art, in the midsummer season when the refrigeration load is large, the time for stopping the follow-up operation of the cooling device during the heat dissipation operation and shifting to the peak cut operation is set in advance. Even if the refrigeration load, outside air temperature, humidity, etc. are at a level that does not require the operation of the cooling device, the cooling device continues to follow up until the set time, so that the peak cut operation Therefore, there is a problem that the cooling device is uselessly operated, the driving power of the cooling device is wasted, and the efficiency of the system is reduced. Further, in such a conventional technique, there is also a problem that excessive cooling is performed and comfort deteriorates because the follow-up operation of the cooling device is too long to be performed in the peak cut operation.

In view of the problems of the prior art, the present invention relates to a cooling / refrigeration system using ice heat storage, which is used for a required cooling / refrigeration operation such as an outside air temperature, humidity, and a refrigeration load during an operation period when the refrigeration load is large, such as in the middle of summer. According to the state, it is possible to shift from the stop of the chiller's follow-up operation to the peak cut operation,
It aims to improve the efficiency of the cooling / refrigeration system and realize comfortable cooling.

[0009]

According to the present invention, there is provided a compressor for compressing a refrigerant, comprising: a condenser for cooling and condensing the refrigerant compressed by the compressor. And a cooling device having a cooler for expanding and evaporating the liquid refrigerant from the condenser to cool the water in the heat storage tank to generate water or ice water, and the ice or the ice generated by the heat storage operation. A radiating operation in which ice water flows through the air-conditioning load to give cool air to the air-conditioning load, and a cooling device follow-up operation in which the cooling device is operated during the heat radiating operation to apply further cooling to the air-conditioning load are performed. An ice storage cooling / refrigeration system, comprising: an outside air state detecting means for detecting an outside air state of an outside air temperature, a humidity, and an amount of solar radiation; and an external air state at an early stage of the heat radiation operation detected by the outside air state detecting means. The outside air temperature prediction means for predicting the outside air temperature during the cooling device follow-up operation, the air conditioning load calculating means for calculating the air conditioning load based on the detected value of the outside air state, and the outside air state, the outside air temperature prediction value and the air conditioning load. An operation control device for an ice storage cooling / refrigeration system, comprising: a cooling device following operation stop time calculating means for calculating a transition time to the cooling device following operation and a peak cut operation based on the cooling device following operation. suggest.

According to a second aspect of the present invention, in the first aspect of the present invention, an operation time detector for detecting an operation time of the heat dissipation operation, a target value of the heat dissipation operation end time, and the operation time detector detect the operation time. A correction value calculator for calculating a correction value of the heat dissipation operation end time from a difference between the detected value of the heat dissipation operation end time and the correction value. The device follow-up operation time calculation section is configured to output the cooling device follow-up operation stop time corrected by the correction value.

According to a third aspect of the present invention, in the first aspect of the present invention, the outside air state detected by the outside air state detecting means and the state of the heat storage tank such as the temperature and water level of the heat storage tank can be continuously displayed. And a display device for displaying the setting items for the heat storage operation and the heat dissipation operation so that the set values can be changed.

A fourth aspect of the present invention is directed to a method of operating the cooling / refrigeration system according to any of the first to fourth aspects of the present invention, and includes a compressor for compressing a refrigerant, and a refrigerant compressed by the compressor. A condenser for cooling and condensing, and a cooling device having a cooler for expanding and storing the liquid refrigerant from the condenser to cool water in the heat storage tank to generate ice or ice water; A cooling operation for supplying cooling to the air-conditioning load by flowing air through the air-conditioning load, and a cooling device following operation for operating the cooling device during the heat-dissipating operation to apply further cooling to the air-conditioning load. In controlling the operation of the refrigeration system, the outside air temperature, humidity, and the amount of solar radiation are detected at the beginning of the heat radiation operation, and the outside air temperature during the cooling device follow-up operation is predicted based on these detected values. Both calculating the air conditioning load, and calculating the transition time to the cooling device follow-up operation and the transition to the peak cut operation based on the outside air condition, the predicted value of the outside air temperature and the calculated value of the cooling load, An operation control method for a cooling / refrigeration system.

According to the invention, the air-conditioning load calculating means calculates the air-conditioning load (predicted value) based on the detected value of the outside air condition including the outside air temperature, humidity and the amount of solar radiation at the beginning of the heat dissipation operation.
Based on the detected value of the outside air condition such as the outside air temperature, the temperature at the peak cut time (predicted value) is calculated and input to the cooling device follow-up operation stop time calculating means together with the predicted value of the air conditioning load. In the hanging operation stop time calculating means, the following operation stop time of the cooling device performed during the heat dissipation operation is calculated to control the following operation time of the cooling device.

Therefore, according to this invention, the operation of the cooling device is controlled by calculating the stop time of the cooling device follow-up operation during the heat radiation operation based on the predicted value of the air conditioning load based on the outside air condition and the detected value of the outside air condition. Therefore, the follow-up operation by the cooling device can be performed accurately following the air-conditioning load and the outside air condition, and the following operation is performed only for a necessary time depending on the air-conditioning load and the outside air condition. In addition to avoiding unnecessary driving and wasting of driving power, a decrease in comfort due to excessive cooling is prevented.

According to the third aspect of the present invention, setting and changing of operation time such as heat storage operation time, peak cut operation time, and heat radiation operation time, the outside air state such as outside air temperature and humidity, and the state of the heat storage tank. Is displayed on the display device, the operating state of the system can be accurately monitored.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, dimensions, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the invention, but are merely illustrative examples.

FIG. 1 is an overall configuration diagram (hardware configuration diagram) of an ice thermal storage cooling / refrigeration system according to an embodiment of the present invention, FIG. 2 is a control block diagram of the system in the midsummer period, and FIG. FIG. 4 shows an operation time table in the intermediate period.

Referring to FIG. 1, an ice thermal storage cooling / refrigeration system according to this embodiment includes a thermal storage tank 10, a computer 15 having an interface 14, a cooling coil 11, which is an evaporator incorporated in the thermal storage tank 10, Expansion valve 11a,
Condenser 12, compressor 13 provided outside heat storage tank 10
And a cooling device 20 including a pump 17 and an air conditioning load 16 having a chilled water supply path including a forward path supply path 18a and a return path supply path 18b. In FIG. 1, 1 is an outside air temperature detector for detecting the temperature of the outside air, 2 is a heat storage tank temperature detector for detecting the temperature in the heat storage tank 10, 3 is an insolation detector for detecting the amount of insolation, and 4 is A humidity detector for detecting the humidity of the outside air, 5 a water level detector for detecting the water level of the heat storage tank 10, and 6 an operation time detector for detecting the operation time of the present system. The data is input to the computer 15 via the interface 14 every moment.

The computer 15 performs necessary calculations, and outputs a control signal as a result of the calculation to the compressor 13 of the cooling device 20 to control the operation of the present system.

In the ice storage cooling / refrigeration system having the above-described structure, the refrigerant compressed by the compressor 13 is cooled and condensed by the condenser 12, and then thermally expanded in stages by the expansion valve 11 a. The heat is exchanged with the water in the heat storage tank to evaporate and return to the compressor 13. The cold generated by the cooling device 20 by this operation is stored in the heat storage tank 10.
The water inside is cooled or frozen, and stored in the heat storage tank 10 to form ice water. The ice thus formed is attached to the surface of the cooling coil 11. This amount of water is measured by the thickness of the attached ice. Then, the cold water in the heat storage tank 10 circulates through the air conditioning load 16 via the pump 17, the outgoing supply path 18a, and the return supply path 18b. At that time, the chilled water is heated by applying cold to the air conditioning load 16, the temperature is raised, and the chilled water returns to the heat storage tank 10.

Next, a control operation of the operation control device according to this embodiment in the midsummer season will be described with reference to FIG. FIG.
In the figure, reference numeral 100 denotes a load control device provided in the computer 15, and a detected value T1 of the outside air temperature from the outside air temperature detector ₁ is stored in an outside air temperature storage unit 32 of the load control device 100 by a humidity detector. Detected value of outside air U from 4
Is stored in the humidity storage unit 33, and the detection value S of the solar radiation amount from the solar radiation detector 3 is input and stored in the solar radiation storage unit 34 every moment.

Reference numeral 19 denotes a display device, and the detected value T _{1 of} the outside air temperature, the detected value U of the humidity, and the detected value S of the amount of solar radiation are input to the display device 19. Further, the display device 19 displays the heat storage tank temperature and the water level detector 5 from the heat storage tank temperature detector 2.
The detected value of the water level is input from time to time, and is displayed together with the outside air temperature, humidity, and solar radiation.

Reference numeral 50 denotes an operation type selection device, which is an operation time table as shown in FIG. 3 in the middle of summer (from early July to late September), and an operation time table as shown in FIG. ), And this selection signal is input to the load control device 100.

When the midsummer operation is selected by the operation type selection device 50, the load control device 100 performs the following control operation.

Reference numeral 36 denotes an outside air temperature predicting unit, which is _one of the outside air temperatures T1 stored in the outside air temperature storage unit 32 shown in FIG.
By using the humidity U ₀ at the initial time of the humidity U stored as the outside air temperature T ₁₀ in the humidity storage unit 33 in the radiating operation initial time (e.g., 9:00 a.m., hereinafter referred to as the initial time) in the simulation calculates the predicted value T ₅ of the outside air temperature during the day by the following approximate expression (1) derived from. T ₅ = 0.9T ₁₀ −0.065 U ₀ +10.4 (° C.) (1)

Reference numeral 31 denotes an air-conditioning load setting unit.
The relationship between the daytime and the outside air temperature during the day is set, for example, as shown in FIG. 39 is a air-conditioning load calculating section, the outside air temperature prediction unit of the outside air temperature from 36 daytime predicted value T ₅ is inputted, against the setting line of FIG. 5 which is set in the air-conditioning load setting unit 31 , determine the air conditioning load L corresponding to the predicted value T ₅ of the outside air temperature during day.

That is, in FIG.₅₁ (For example
Air conditioning load L at 32 ° C)₅₁(7201 Kcal / H)
And the temperature T₅₂(For example, 26 ° C.) air conditioning load L
₅₂(5197 KcaL / H), the outside air temperature T
₅₁Air conditioning load L at (32 ° C) ₅₁100%
And the predicted outside air temperature T during the day₅₂Air conditioning at (26 ° C)
Load L₅₂(L₅₂/ L₅₁) Is about 70%,
Temperature difference T₅₁-T ₅₂(32-26 = 6 ° C)
Full load: ΔL is ΔL = 30%.

Numeral 40 denotes a cooling device follow-up operation capability calculation unit, which radiates heat based on the heat storage operation capability of the present system: Q ₁
And add hanging capacity of the cooling device 20 (i.e. add hanging capacity of the refrigerator): ratio of _{Q 2 (i = (Q 2} / Q 1) × 100%)
Is set. In this embodiment, i is set to 60%.

An operation time setting unit 30 is shown in FIG.
Heat storage operation time indicating heat storage operation time (t ₁~ T₂)
Heat storage operation time setting device 301, start of peak cut operation
Time: t₃(See Fig. 3) During peak cut operation
Interval setter 302, target time t for completion of heat dissipation operation₅(See Figure 3
) For setting the heat dissipation operation time setting device 303 and the like.
The set values in the setting units 301, 302 and 303 are
The setting units 301 and 30 can be changed from outside.
The setting values in 2, 303 are available for the display device
Is displayed.

Reference numeral 35 denotes a heat dissipation operation time storage unit.
The operation time of the present system detected by the operation time detector 6, that is, the operation time from the beginning of the heat storage operation to the completion of the heat radiation operation in FIG. 3 is continuously stored. Numeral 38 denotes a correction value calculating unit, which is a heat radiation completion target time t ₅ (see FIG. 3) of the previous day from the heat radiation operation time setting unit 303 and an actual heat radiation completion time T stored in the heat radiation operation time storage unit 35. _The correction value ΔP to be fed back to the cooling device follow-up stop time: P, which will be described later, is calculated by the following equation (2) by using the difference from F.50. ΔP = (t ₅ −t ₅₀ ) / 2 + ΔP ₁ (2) Here, ΔP ₁ is a correction value of the previous day, and the initial value = 0.

[0031] 41 is a cooling device additionally multiplied downtime calculation unit, wherein the outside air temperature prediction unit 36 (1) is the predicted value t ₅ of the outside air temperature during the day calculated by equation outside air from the humidity storage unit 33 The detector U of the humidity receives the detected value S of the amount of solar radiation from the solar radiation amount storage unit 34, respectively. In addition, the cooling device follow-up operation time calculation unit includes a cooling device follow-up load capability ratio i (i = 60% in this embodiment) calculated from the cooling device follow-up operation capability calculation unit 40 as described above, and The correction value ΔP calculated by the equation (2) is input from the correction value storage unit 37.

Then, the cooling device follow-up operation stop time calculating unit 41 calculates the follow-up operation stop time of the cooling device 20 during the heat dissipation operation in the following procedure according to the following procedure. That is, the cooling device follow-up operation stop time (hour): ts is expressed as ts = P _k − {(8−0.25T ₅ ) −0.2S ₀ } −ΔP (3) When ts> P _k , = _Pk . Here, P _k = peak cut operation start time S ₀ = solar radiation amount at initial time (for example, 9:00 am)

Specifically, the stop time ts is calculated by the following procedure. The cooling device following capability ratio i (in this example, i =
60%) and constant temperature difference between the air conditioning load L calculated in the air-conditioning load calculating section 39 _(T 51 _{-T 52)} The full load [Delta] L (this example between _T 51 _{-T 5} 2 = 32-26 =
By contrast 6 ℃ ΔL = 30%) and the following (4) obtaining the cooling device additionally multiplied downtime _{x 0} at expression. ΔL × Δtp = i × x ₀ (4)

Here, Δtp = peak cut operation time (3 hours when the peak cut operation time zone is from 13:00 to 16:00). According to the above example, ΔL = 30%, i = 60%, and Δtp
= 3 (hr), x ₀ = ΔL × Δtp) / i = 30 × 3/60 = 1.5 (hr) Therefore, the cooling device follow-up operation stop time calculated based on the air-conditioning load and the outside air temperature is (3) as in the formula (), x = 8- (0.25 × (T 51 or _T 52)) ... (5) when the outside air temperature _T 51 = 32 ° C. Thus x = 8-0.25 × 32 = 0 x = 8−0.25 × 2 when the outside air temperature T ₅₂ = 26 ° C.
6 = 1.5 (hr), which is also shown in FIG.

Accordingly, the cooling device follow-up operation stop time ts incorporating the solar radiation amount S and the correction value ΔP is expressed by the following equation (3), the peak cut operation start time _Pk , the input value of the solar radiation amount S, and the equation (2). Can be calculated by substituting the correction amount ΔP calculated in.

The cooling device follow-up operation stop time ts calculated as described above is input to the cooling device control and operation device 42, and at this time ts, the follow-up operation by the cooling device 20 is stopped. Is a fixed time (t in FIG. 3)
₃ ~t ₄ between) is continued.

As described above, according to the embodiment, the predicted value of the air-conditioning load is calculated based on the detected value of the outside air temperature, and the predicted value of the air-conditioning load and the detected values of the outside air temperature, humidity, and solar radiation are calculated. , Cooling device follow-up operation stop time calculation unit 41
Calculates the cooling device follow-up operation stop time during the midsummer heat dissipation operation, and controls the operation of the cooling device 20, so that the follow-up operation time of the cooling device is controlled by correctly following the outside air condition and the air conditioning load. be able to.

[0038]

As described above, according to the present invention, the cooling during the heat radiation operation is performed based on the predicted value of the air-conditioning load based on the outside air condition and the detected value of the outside air condition in the high summer when the cooling device requires the follow-up operation. Since the operation of the cooling device is controlled by calculating the stop time of the device follow-up operation, the follow-up operation by the cooler can accurately follow the air-conditioning load and the outside air condition, and is necessary depending on the air-conditioning load and the outside air condition. The following operation can be performed only for a short time.

As a result, it is possible to avoid unnecessary operation of the cooling device and wasteful power consumption associated therewith, and also to prevent a decrease in comfort due to excessive cooling.

Further, in particular, according to the structure of claim 4,
Accurate operation of the system can be performed while monitoring the setting and change status of each operation time such as heat storage, peak cut, heat release, and the like, and the outside air condition on the display device.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram (hardware diagram) of an ice heat storage cooling / refrigeration system according to an embodiment of the present invention.

FIG. 2 is an operation control block diagram of the ice storage cooling / refrigeration system in the embodiment.

FIG. 3 is an operation time table of the ice thermal storage cooling / refrigeration system at a high summer time.

FIG. 4 is an operation time table at an intermediate time of the system.

FIG. 5 is a relationship diagram between an outside air temperature and an air conditioning load in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outside air temperature detector 2 Thermal storage tank temperature detector 3 Solar radiation detector 4 Humidity detector 5 Water level detector 6 Operating time detector 10 Thermal storage tank 11 Cooling coil 11a Expansion valve 12 Capacitor 13 Compressor 14 Interface 15 Computer 16 Air conditioning load Reference Signs List 17 pump 19 display device 20 cooling device 30 operation time setting unit 36 outside air temperature prediction unit 38 correction value calculation unit 39 air conditioning load calculation unit 40 cooling device tracking operation capability calculation unit 41 cooling device tracking operation stop time calculation unit 100 load control apparatus

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toru Matsuda 20-1 Kitakanyama, Midori-ku, Midori-ku, Nagoya-shi, Aichi 1 Inside Chubu Electric Power Co., Inc. (72) Katsuzo Hasegawa 2-chome Botan, Koto-ku, Tokyo No. 13-1 Inside Maekawa Corporation (72) Inventor Seiji Nishimura 2-1-1 Botan, Koto-ku, Tokyo Inside Maekawa Corporation

Claims (4)

[Claims] 1. A heat storage tank including a compressor for compressing a refrigerant, a condenser for cooling and condensing the refrigerant compressed by the compressor, and a cooler for expanding and evaporating a liquid refrigerant from the condenser. A heat storage operation for cooling the water to generate ice or ice water, a heat dissipation operation for flowing the ice or ice water generated by the heat storage operation to an air-conditioning load and applying cold to the air-conditioning load, In an ice storage cooling / refrigeration system in which the cooling device is operated to perform a cooling device follow-up operation for applying further cooling to the air conditioning load, an outside air condition detection for detecting an outside air condition of outside air temperature, humidity, and solar radiation Means for predicting the outside air temperature during the cooling device follow-up operation based on the outside air state at the beginning of the heat radiation operation detected by the outside air state detection means; and detecting the outside air state. An air-conditioning load calculating unit that calculates an air-conditioning load based on the output value; and a cooling device chasing operation stop time calculating unit that calculates a halt time of the cooling device chasing operation based on the outside air condition, an outside air temperature predicted value, and the air conditioning load. An operation control device for an ice storage cooling / refrigeration system, comprising: 2. An operation time detector for detecting an operation time of the heat dissipation operation; and a difference between a target value of the heat dissipation operation end time and a detected value of the heat dissipation operation end time detected by the operation time detector. A correction value calculating unit for calculating a correction value of the heat dissipation operation end time, wherein the correction value is input to the cooling device tracking operation stop time calculation unit, and the cooling device tracking operation time calculation unit calculates the correction value based on the correction value. 2. The operation control device for an ice storage cooling / refrigeration system according to claim 1, wherein the operation control device outputs the corrected cooling device follow-up operation stop time. 3. An external air state detected by the external air state detecting means and a state of the heat storage tank such as a temperature and a water level of the heat storage tank can be continuously displayed, and the setting during the heat storage operation and the heat radiation operation can be performed. 3. The operation control device for an ice storage cooling / refrigeration system according to claim 2, wherein the item is displayed so that its set value can be changed. 4. Heat storage by a cooling device having a compressor for compressing a refrigerant, a condenser for cooling and condensing the refrigerant compressed by the compressor, and a cooler for expanding and evaporating the liquid refrigerant from the condenser. A heat storage operation for cooling the water in the tank to generate ice or ice water, a heat dissipation operation for flowing the ice or ice water to an air conditioning load and applying cold to the air conditioning load,
In controlling the operation of the ice storage cooling / refrigeration system by operating the cooling device during the heat dissipation operation and performing a cooling device follow-up operation for applying further cooling to the air conditioning load, the outside air temperature, humidity, and the initial temperature of the heat dissipation operation are controlled. Detecting the outside air state of the amount of solar radiation, calculating the air conditioning load while predicting the outside air temperature during the cooling device follow-up operation based on these detected values,
An operation control method for an ice storage cooling / refrigeration system, wherein a stop time of the cooling device follow-up operation is obtained based on the outside air state, the predicted value of the outside air temperature, and a calculated value of a cooling load.