JP6291756B2 - Information processing apparatus, information processing method, program, and recording medium - Google Patents

Description

  The present invention relates to an information processing apparatus, an information processing method, a program, and a recording medium that generate information for controlling the operation of an external air conditioner.

  When there is a person in the room, if the indoor air does not circulate, the concentration of carbon dioxide in the room increases with time. It is dangerous for humans to raise the concentration too much. Therefore, it is necessary to take measures to prevent an increase in the carbon dioxide concentration in the room. An external air conditioner is known as a device for realizing this. The outdoor air conditioner takes outdoor air (outside air) into the room and circulates the air in the room, thereby reducing the carbon dioxide concentration in the room.

  When the indoor and outdoor temperatures are different from each other, when the outdoor air conditioner takes in the outside air as it is, the indoor temperature changes based on the indoor and outdoor temperature difference. For example, if the outside air is taken into the room as it is on a hot summer day, the room temperature rises. On the other hand, indoor temperatures drop on cold winter days. Neither is desirable for indoor people.

  Therefore, generally, the external air conditioner adjusts the temperature when taking outside air into the room. For example, when the outdoor temperature is higher than the room temperature, the outside air is cooled and then taken into the room. In the opposite case, warm the outside air and take it indoors. These measures will try to keep indoor temperature changes to a minimum.

  The external air conditioner usually adjusts the temperature of the outside air using a heat medium (mainly water) supplied from a heat source device. Therefore, when the outdoor air conditioner takes in outdoor air into the room, a certain load corresponding to the temperature difference between the outside and the room is applied to the heat source device.

  There are various methods for controlling the operation of the external air conditioner. One is to always take a designed amount of outside air into the room. In this case, the outside air is excessively taken into the room, and as a result, the electric energy of the external air conditioner may increase excessively. In addition, since a constant amount of heat energy for treating the outside air is always required, there is a possibility that the heat energy is wasted.

  Therefore, there is a method of changing the operation of the external air conditioner according to the situation from the viewpoint of energy saving. For example, in a store such as a department store, there is a method of reducing the amount of outside air taken in on weekdays to half of Sundays and public holidays. There is also a method of automatically detecting the carbon dioxide concentration in the room and adjusting the opening degree of the outside air damper based on the result. In either case, it is possible to reduce the power consumption of the external air conditioner and the load on the heat source device by reducing the amount of outside air taken in by the external air conditioner as necessary.

  In Patent Document 1, when performing outside air cooling, a damper opening MV (t) corresponding to a deviation between the supply air temperature Tpv and the supply air temperature setting value Tsp is obtained as a control output, and the damper opening MV of the outside air damper is obtained. An air-conditioning control device to be controlled is disclosed. According to this device, it is possible to always maintain appropriate outside air cooling control regardless of the temperature difference between the outside air temperature and the return air temperature.

Japanese Patent Laid-Open No. 11-211190 (released on August 6, 1999)

  However, the conventional technologies as described above do not consider any control of heat source equipment. Therefore, there is a problem that the heat source device cannot be operated with high efficiency.

  The present invention has been made to solve the above problems. The purpose is to reduce the power consumption of the external air conditioner and calculate the operation ratio of the external air conditioner and the number of operating heat source devices that can operate the heat source device with high efficiency. An information processing apparatus is to be realized.

[Summary]
In order to solve the above problems, an information processing apparatus according to the present invention provides
Load calculating means for calculating a load reduced in the specific time period from a plurality of heat source devices that supply a heat medium to the external conditioner when the external air conditioner does not operate in a specific time period;
Difference calculation means for calculating a difference obtained by subtracting the sum of the upper limit capacities of the predetermined number of the heat source devices from the predicted demand of the heat medium in the specific time zone,
An operation ratio calculating means for calculating an operation ratio of the external air conditioner in the specific time period based on a ratio of the difference with respect to the load;
Demand calculating means for calculating the demand for the heat medium when the external air conditioner operates based on the operating ratio in the specific time zone based on the predicted demand and the operating ratio;
An operation number calculating means for calculating the predetermined number as the operation number of the heat source devices in the specific time zone is provided.

  According to the above configuration, the information processing apparatus determines the ratio of the difference to the load that can be reduced when the external air conditioner is completely stopped in a specific time period, and the operation ratio of the external air conditioner in the specific time period. Calculate as Therefore, if the external air conditioner is stopped by an operation ratio in a specific time zone, the load actually reduced in the specific time zone becomes equal to the difference.

  The actual demand for the heat medium when the external air conditioner is controlled based on the closed ratio in a specific time zone is the value obtained by subtracting the load (= difference) actually reduced in the specific time zone from the predicted demand. It is. Since the predicted demand is the sum of the upper limit capacities added to the difference, the actual demand in a specific time zone theoretically matches the sum of the upper limit capacities of the heat source devices for a predetermined number. That is, the closed ratio calculated by the information processing apparatus is an operation ratio that enables a predetermined number of refrigerators 8 to operate at the limit of the upper limit capacity in a specific time zone. The information processing apparatus calculates this predetermined number as the number of heat source devices that are operated in a specific time zone.

  As described above, the information processing device reduces the power consumption of the external air conditioner and calculates the operation ratio of the external air conditioner and the number of heat source devices that can operate the heat source equipment with high efficiency. can do.

In the information processing apparatus according to the present invention,
It is preferable to further include a first output means for outputting a control signal for instructing operation based on the operation ratio to the external air conditioner.

  According to said structure, an external air handler can be controlled automatically.

In the information processing apparatus according to the present invention,
It is preferable that the apparatus further includes a second output unit that outputs a control signal instructing to operate the number of the operating units in the specific time zone to the plurality of heat source devices.

  According to said structure, each heat-source apparatus can be controlled automatically.

In the information processing apparatus according to the present invention,
It is preferable that the operation ratio calculation means calculates a ratio of time during which the external air conditioner stops in the specific time zone as the operation ratio.

  According to said structure, based on the calculated operation | movement ratio, it becomes possible to operate the heat-source apparatus of operation object with high efficiency by stopping an external air conditioner for a fixed time in a specific time slot | zone.

In the information processing apparatus according to the present invention,
It is preferable that the operation ratio calculation means calculates a ratio of the external air conditioner that stops among the plurality of external air conditioners in the specific time zone as the operation ratio.

  According to said structure, based on the calculated operation | movement ratio, it becomes possible to operate the heat-source apparatus of operation object with high efficiency by completely stopping a fixed number of external air conditioners in a specific time slot | zone. .

In the information processing apparatus according to the present invention,
Inside air enthalpy calculating means for calculating inside air enthalpy in the vicinity of the outlet of the external air conditioner,
An outside air enthalpy calculating means for calculating the outside air enthalpy in the specific time zone,
Preferably, the load calculating means calculates the load based on the inside air enthalpy and the outside air enthalpy.

  According to said structure, a load can be calculated correctly.

In the information processing apparatus according to the present invention,
The inside air enthalpy calculating means preferably calculates the inside air enthalpy based on a predetermined temperature and humidity near the outlet.

In the information processing apparatus according to the present invention,
It is preferable that the outside air enthalpy calculating unit calculates the outside air enthalpy based on the predicted temperature and humidity of the outside air in the specific time zone.

In the information processing apparatus according to the present invention,
The plurality of heat source devices are refrigerators,
Preferably, the load calculating means calculates the load based on a value obtained by subtracting the inside air enthalpy from the outside air enthalpy.

  According to said structure, the cooling of a living room can be performed efficiently.

In the information processing apparatus according to the present invention,
The plurality of heat source devices are heaters,
Preferably, the load calculating means calculates the load based on a value obtained by subtracting the outside air enthalpy from the inside air enthalpy.

  According to said structure, heating of a living room can be performed efficiently.

In the information processing apparatus according to the present invention,
The operation ratio is a ratio for stopping the external air conditioner,
The operating rate calculating means determines the operating rate as the minimum operating rate when the calculated operating rate is lower than a predetermined minimum operating rate based on a carbon dioxide concentration near the outlet of the external air conditioner. Is preferred.

  According to said structure, it can prevent that an external air handler operate | moves excessively and the power consumption rises.

In the information processing apparatus according to the present invention,
The operation ratio is a ratio for stopping the external air conditioner,
The operation ratio calculation means determines the operation ratio as the maximum operation ratio when the calculated operation ratio exceeds a predetermined maximum operation ratio based on the carbon dioxide concentration near the outlet of the external air conditioner. Is preferred.

  According to said structure, it can prevent that the carbon dioxide concentration in a living room rises excessively.

In order to solve the above problems, an information processing method according to the present invention provides
A load calculating step of calculating a load reduced in the specific time period from a plurality of heat source devices that supply a heat medium to the external conditioner when the external conditioner does not operate in a specific time period;
A difference calculating step of calculating a difference between the total of the upper limit capacities of the predetermined number of the heat source devices and the predicted demand of the heat medium in the specific time zone;
Based on the load and the difference, an operation ratio calculating step for calculating an operation ratio of the external air conditioner in the specific time zone;
Based on the predicted demand and the operation ratio, a demand calculation step of calculating the demand for the heat medium when the external air conditioner operates based on the operation ratio in the specific time zone;
The operation number calculation step of calculating the predetermined number is included as the operation number of the heat source devices in the specific time zone.

  According to said structure, there exists an effect similar to the information processing apparatus which concerns on this invention.

  Each of the information processing apparatuses described above may be realized by a computer. In this case, the information processing apparatus that realizes the information processing apparatus by a computer by causing the computer to operate as each unit included in the information processing apparatus. A control program and a computer-readable recording medium on which the control program is recorded also fall within the scope of the present invention.

  The present invention reduces the power consumption of the external air conditioner and can calculate the operation ratio of the external air conditioner and the number of heat source devices that can operate the heat source device with high efficiency. Play.

It is a block diagram which shows the structure of the air-conditioning control apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structure of the air-conditioning control system which concerns on the 1st Embodiment of this invention. It is a graph which shows the example of the relationship between the time slot | zone for one day of a specific day, and cold water demand in the air-conditioning control system which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the flow of the whole process which the air-conditioning control apparatus performs in the 1st Embodiment of this invention. In the 1st Embodiment of this invention, a load calculation part is a flowchart which shows the flow of a process at the time of calculating a closing ratio. In the 1st Embodiment of this invention, it is a flowchart explaining the flow of a process at the time of a demand calculation part calculating the cold water demand when controlling an external air conditioner in a specific time slot | zone. FIG. 6 is a flowchart for explaining the flow of processing when calculating the number of operating refrigerators in the first embodiment of the present invention when the operating number calculating unit controls the external air conditioner in time zone D. FIG. In the air-conditioning control system according to the first embodiment of the present invention, the time zone for one day on a specific day, the predicted demand for cold water calculated by the air-conditioning control device, and the cold water demand when controlling the external air conditioner It is a graph which shows the example of a relationship with a closing ratio. In the 1st Embodiment of this invention, it is a figure which shows the data which made the closing ratio of the external air conditioning machine in each time slot | zone, and the operation | movement number of refrigerators into the table format. It is a graph which shows the example of the relationship between the time slot | zone for one day of a specific day, and cold water demand in the air-conditioning control system which concerns on the 2nd Embodiment of this invention. In the air-conditioning control system according to the third embodiment of the present invention, the time period for one day on a specific day, the predicted demand for cold water calculated by the air-conditioning control device, and the cold water demand when controlling the external air conditioner It is a graph which shows the example of a relationship with a closing ratio. It is a block diagram which shows the structure of the air-conditioning control system which concerns on the 4th Embodiment of this invention. It is a figure which shows the modification of the air-conditioning control system which concerns on each 1st-4th embodiment of this invention.

Embodiment 1
An embodiment according to the present invention will be described below with reference to FIGS.

(Outline of air conditioning control system 100)
FIG. 2 is a block diagram showing the configuration of the air conditioning control system 100 according to the first embodiment of the present invention. As shown in this figure, an air conditioning control system 100 includes an air conditioning control device 1 (information processing device), an external air conditioner 4, an internal air conditioner 6, two refrigerators 8 (heat source equipment), and two cooling towers 10. Two pumps 12, two pumps 14, a header 16, a header 18, and two pumps 20 are provided.

  The air conditioning control system 100 is a system that controls the air conditioning in the living room 2. The air conditioning control in the present embodiment is cooling of the living room 2. The internal air conditioner 6 takes in the air in the living room 2 into itself, cools it, and then provides it to the living room 2 again. Thereby, the inside of the living room 2 is cooled. The external air conditioner 4 takes the outside air of the living room 2 into the living room 2. Thereby, the air in the living room 2 is circulated, and the increase in the carbon dioxide concentration in the living room 2 is prevented.

  The temperature of the outside air is often higher than the temperature in the living room 2. Therefore, the external air conditioner 4 cools the outside air and takes it into the living room 2. Thereby, compared with the case where outside air is taken in in a storage as it is, the grade which the temperature in the living room 2 rises with the taken in outside air is eased. Usually, the external air conditioner 4 is set to cool the living room 2 by taking outside air into the living room 2 after the outside air is lowered below the temperature of the living room 2.

  Both the internal air conditioner 6 and the external air conditioner 4 cool the air using cold water. In the air conditioning control system 100, the two refrigerators 8 provide cold water to the internal air conditioner 6 and the external air conditioner 4.

  In the air conditioning control system 100, a corresponding cooling tower 10 and pump 12 are provided for each refrigerator 8. The cooling tower 10 cools water using outside air and supplies it to the corresponding refrigerator 8 through the pump 12. The refrigerator 8 performs heat exchange between the cooling water provided from the cooling tower 10 and the water circulating inside itself through a predetermined refrigerant (water or the like). Thereby, the cooling water is warmed and becomes slim, and the water circulating around the inside is cooled to become cold water. Each pump 14 operates during operation of the corresponding refrigerator 8, and sends cold water in the corresponding refrigerator 8 to a common header 16. The header 16 is a water passage through which cold water sent from each refrigerator 8 joins. The cold water sent to the header 16 branches from the header 16 and is sent to the external air conditioner 6 and the internal air conditioner 6.

  The cooling water used for heat exchange in the refrigerator 8 is returned again to the corresponding cooling tower 10. The cooling tower 10 cools the water heated in the refrigerator 8 again using outside air.

  The cold water used for cooling the air in the internal air conditioner 6 and the external air conditioner 4 is sent to the header 18. The header 18 is a water passage where the sent water merges. Each pump 20 operates during operation of the corresponding refrigerator 8 and provides water in the header 18 to the corresponding refrigerator 8. The refrigerator 8 cools the water thus circulated using the cooling water provided from the cooling tower 10. As shown in FIG. 2, in the air conditioning control system 100, corresponding pumps 14 and 20 are provided for each refrigerator 8. Both of the two pumps 14 and the two pumps 20 are individually connected to the corresponding refrigerator 8.

  In the air conditioning control system 100, the air conditioning control device 1 controls the operation of these devices by transmitting predetermined control signals to the external air conditioner 4, the refrigerator 8, and the cooling tower 10. As will be described in detail later, the air conditioning control device 1 operates the external control so that one refrigerator 8 is operated with high efficiency and the remaining one is stopped in each time zone in which the external controller 4 operates. The operation ratio of the machine 4 is calculated. Thereby, while suppressing the power consumption of the external air handler 4, it implement | achieves operating the refrigerator 8 with high efficiency.

(Configuration of air conditioning control device 1)
FIG. 1 is a block diagram showing a configuration of an air conditioning control device 1 according to the first embodiment of the present invention. As shown in this figure, the air-conditioning control apparatus 1 includes a load calculation unit 22 (load calculation unit, inside air enthalpy calculation unit, outside air enthalpy calculation unit), a difference calculation unit 24 (difference calculation unit), and an operation ratio calculation unit 26 (operation A ratio calculation unit), a demand calculation unit 28 (demand calculation unit), an operation number calculation unit 30 (operation number calculation unit), and an output unit 32 (first output unit, second output unit).

(About parameters)
In the memory of the air conditioning control device 1, the following parameters are stored in advance.

・ Physical constants for enthalpy calculation ・ Maximum outdoor air load ratio to chilled water demand ・ Number of external air conditioners 4
・ Rated air volume near the outlet of the external air conditioner 4 ・ Air density near the outlet of the external air conditioner 4 ・ Temperature near the outlet of the external air conditioner 4 ・ Humidity near the outlet of the external air conditioner 4 ・ Minimum closing of the external air conditioner 4 Ratio ・ Maximum closed ratio of external air conditioner 4 ・ Operation start time of external air conditioner 4 ・ Operation end time of external air conditioner 4 ・ Upper capacity of refrigerator 8 ・ Predicted demand for cold water ・ Predicted temperature of outside air ・ Predicted humidity of outside air .

  The air conditioning control device 1 uses these parameters to calculate the operation ratio of the external air conditioner 4 and the number of refrigerators 8 to be operated in each time zone. Furthermore, the demand for cold water when the air conditioner 4 operates based on the calculated operation ratio is also calculated. The following supplements these parameters.

  The physical constant for calculating enthalpy is a physical constant included in an expression used for calculating enthalpy, such as Antoine constant.

  The maximum outside air load ratio with respect to the cold water demand is a ratio of the outside air load closing in the total demand for cold water. In other words, it is the ratio of the amount of cold water used by the external air conditioner 4 per unit time in the total amount of cold water supplied by each refrigerator 8 per unit time.

  The rated air volume, air density, temperature, and humidity in the vicinity of the outlet of the external air handler 4 are fixed values that are calculated in advance. That is, the air-conditioning control device 1 sends outside air into the living room 2 with a constant air volume in all time zones during which the external air conditioner 4 is in operation, whereby the air density, temperature, and It is assumed that the humidity is kept constant.

  The minimum closing rate (minimum operating rate) and the maximum closing rate (maximum operating rate) of the external air handler 4 are fixed values calculated in advance based on the carbon dioxide concentration in the living room 2. The minimum closing ratio is set to prevent the external air conditioner 4 from operating excessively. On the other hand, the maximum closing ratio is set to prevent the carbon dioxide concentration in the living room 2 from rising excessively.

  The operation start time and the operation end time of the external air conditioner 4 are the time at which the operation of the external air conditioner 4 is started and the time at which it is ended in one day. In this embodiment, the operation start time is 7 o'clock and the operation end time is 19 o'clock.

  The upper limit capacity of the refrigerator 8 is thermal energy that the refrigerator 8 takes away from water per unit time.

  The predicted cold water demand is a predicted value of the daily cold water demand on a day that is a calculation target of the operation ratio of the external air conditioner 4 that is calculated in advance using a predetermined simulator. The daily cold water demand can be calculated, for example, based on the measured value of the daily cold water demand on the same day in the past. Or it can also calculate based on the measured value of the cold water demand for one day measured on the day before the day which is the calculation target of the operation ratio of the external air conditioner 4. In this embodiment, the specific time is set every hour, and the length of each time slot is 1 hour. Specifically, the specific time is each time when the minute value is zero, such as 6 o'clock, 7 o'clock, and 8 o'clock. The air-conditioning control device 1 is preliminarily input with the predicted demand for cold water every hour for 24 hours. More specifically, a total of 24 predicted demands including a predicted demand at the time of 0 o'clock, a predicted demand at the time of 1 o'clock,.

  The predicted temperature of outside air is the predicted temperature of outside air on the day on which the operation ratio of the external air conditioner 4 is calculated in advance using a predetermined simulator. The predicted temperature of the outside air for one day can be calculated, for example, based on the measured value of the outside air temperature for one day on the same day in the past. Or it can also calculate based on the measured value of the outdoor temperature for one day measured on the day before the day for which the operation ratio of the external air conditioner 4 is calculated. The predicted temperature of the outside air every hour for 24 hours is input to the air conditioning control device 1 in advance. More specifically, a total of 24 predicted temperatures including a predicted temperature in the 0 o'clock range, an estimated temperature in the 1 o'clock range, and a predicted temperature in the 23 o'clock range are input.

  The predicted humidity of outside air is a predicted value of the outside humidity for one day on the day on which the operation ratio of the external air conditioner 4 is calculated, which is calculated in advance using a predetermined simulator. The predicted humidity of the outside air for one day can be calculated, for example, based on the measured value of the outside air humidity for the day in the same period of the past. Or it can also calculate based on the measured value of the outdoor air humidity for one day measured on the day before the day for which the operation ratio of the external air conditioner 4 is calculated. The predicted humidity of the outside air every hour for 24 hours is input to the air conditioning control device 1 in advance. More specifically, a total of 24 predicted humidity values including a predicted humidity level in the 0 o'clock range, a predicted humidity level in the o'clock range,.

  In addition, the air-conditioning control apparatus 1 also has a simulator function, and the predicted demand for cold water, the predicted temperature of outside air, and the predicted humidity of outside air may be calculated by itself.

(Cold water demand forecast)
FIG. 3 is a graph showing an example of the relationship between the time zone for a day on a specific day and the cold water demand in the air conditioning control system 100 according to the present embodiment. In this figure, the horizontal axis indicates the time zone (h), and the vertical axis indicates the cold water demand (MJ / h). The graph of FIG. 3 shows the predicted demand for cold water 42 in each time zone. In the present embodiment, the predicted demand 42 in each time zone for 24 hours is prepared in the air conditioning control device 1. In the present embodiment, the external air conditioner 4 operates from the 6 o'clock range to the 18 o'clock range and does not operate in other time zones. Zero.

  In FIG. 3, the member number 44 indicates the upper limit capacity of the refrigerator 8 for one unit, and the member number 46 indicates the difference 46 between the predicted demand 42 and the upper limit capacity 44. In a time zone in which the difference 46 is greater than zero, the predicted demand for cold water is greater than the upper limit capacity of the refrigerator 8 for one unit. When there is a cold water demand according to the predicted demand, even if one refrigerator 8 is fully operated, the cold water for the demand cannot be provided. Therefore, it becomes necessary to operate two refrigerators 8. In this case, since the other refrigerator 8 only needs to supply cold water corresponding to the difference 46, the operation efficiency may be much lower than that in the case of full operation. Actually, since the respective refrigerators 8 are equally loaded, the operating efficiency of the two refrigerators 8 is low in the time zone in which the difference 46 is larger than zero.

  Therefore, in the air conditioning control system 100, the air conditioning control device 1 pays attention to the difference 46 and controls the external controller 4 so that the actual demand is less than the predicted demand by the difference 46. As will be described in detail later, the overall operation efficiency of the refrigerator 8 in the air conditioning control system 100 can be increased and the power consumption of the external air conditioner 4 can be reduced by controlling the external air conditioner 4 by the air conditioning control device 1. It becomes possible.

(Air conditioning control processing)
The flow of air conditioning processing performed by the air conditioning control device 1 in the present embodiment will be described below. FIG. 4 is a flowchart showing the flow of overall processing performed by the air conditioning control device 1 in the present embodiment.

  In this embodiment, the air-conditioning control apparatus 1 calculates the operation ratio of the external air conditioner 4 and the number of operating refrigerators 8 in each time zone on the specific day after the next day. Below, the example which makes the calculation object the day when the external air handler 4 operates between 7:00 and 19:00 is demonstrated.

  The air conditioning control device 1 calculates the operating ratio of the external air conditioner 4 and the number of operating refrigerators 8 for each time zone in which the external air conditioner 4 operates. These are not calculated for the remaining time zones. Therefore, in the following example, first, the air conditioning control device 1 designates one time zone in which the external air conditioner 4 operates. Hereinafter, the designated time zone is expressed as time zone D.

(Calculation of shy enthalpy)
In the air conditioning control device 1, the load calculation unit 22 calculates the inside air enthalpy (kJ / kg) in the vicinity of the outlet of the external air conditioner 4 (step SS1). The procedure is as follows.

The load calculation unit 22 first calculates the vapor pressure of water near the outlet of the external air conditioner 4 based on the following equation.
log ₁₀ P = α−β ÷ (T _in + γ)
In this equation, P is the water vapor pressure. T _in is the temperature (K) in the vicinity of the outlet of the external air conditioner 4. α, β, and γ are Antoine constants.

Next, the load calculation unit 22 calculates the saturated vapor pressure (mmHg) of water near the outlet of the external air conditioner 4 based on the following equation.
pws = 7.50062 × P
In this equation, pws is the saturated vapor pressure of water.

Next, the load calculation unit 22 calculates the absolute humidity (kg / kgDA) of water near the outlet of the external air conditioner 4 based on the following equation.
Y = H _in × (0.622 × 1.004 × pws) ÷ (760−1.004 × pws) ÷ 100
In this equation, Y is the absolute humidity of water. H _in is the humidity near the outlet of the external air conditioner 4.

  Next, the load calculation unit 22 calculates the inside air enthalpy (kJ / kg) near the outlet of the external air conditioner 4 based on the following formula.

E _in = Cg × T _in + (hv ₀ + Cv × T _in ) × Y
In this equation, E _in is the inside air enthalpy, Cg is the constant pressure specific heat of dry air (kJ / kg / K), hv ₀ is the latent heat of vaporization of water at 1 atm and 0 ° C. (kJ / kg), Cv is a constant volume specific heat (kJ / kg / K) of water vapor.

(Calculation of outside air enthalpy)
The load calculation unit 22 selects the predicted outside air temperature and predicted humidity in the time zone D stored in the memory. The load calculation unit 22 calculates the outside air enthalpy (kJ / kg) using the predicted temperature and the predicted humidity. The procedure is as follows.

First, the load calculation unit 22 calculates the vapor pressure of water in the outside air based on the following equation.
log ₁₀ P = α−β ÷ (T _out + γ)
In this equation, P is the vapor pressure of water in the outside air, and T _out is the predicted temperature of the outside air in the time zone D.

Next, the load calculation unit 22 calculates the saturated vapor pressure (mmHg) of water based on the following equation.
pws = 7.50062 × P
Next, the load calculation unit 22 calculates the absolute humidity of water in the outside air based on the following formula.
Y = H _out × (0.622 × 1.004 × pws) ÷ (760−1.004 × pws) ÷ 100
In this equation, Y is the absolute humidity of water in the outside air, and H _out is the predicted humidity of outside air in the time zone D.

  Next, the load calculation unit 22 calculates the outside air enthalpy based on the following equation.

E _out = Cg × T _in + (hv ₀ + Cv × T _in ) × Y
In this equation, E _out is the outside air enthalpy.

(Calculation of load)
Based on the calculated inside air enthalpy and outside air enthalpy, the load calculating unit 22 calculates the time from the two refrigerators 8 that supply the heat medium to the outside air conditioner 4 when the outside air conditioner 4 does not operate in the time zone D. The load (MJ / h) reduced in the band D is calculated (step S3). At that time, the load calculation unit 22 uses the following equation.

L = (E _out −E _in ) × W × M × 1000 × N
In this equation, L is a load, W is a rated air volume (m ³ / h) near the outlet of the external air handler 4, and M is an air density (kg / m ³ ) near the outlet of the external air handler 4. Yes, N is the number of external air conditioners 4. In the present embodiment, since the refrigerator 8 cools the outside air using cold water, the outside air temperature is usually higher than the inside air, that is, the outside air enthalpy is larger than the inside air enthalpy. Therefore, the load calculation unit 22 subtracts the inside air enthalpy from the outside air enthalpy in order to calculate the load value that can be reduced as a positive value.

(Calculation of difference)
Next, the difference calculation unit 24 calculates the difference between the upper limit capacity of the refrigerator 8 for one unit and the predicted demand for cold water in the time zone D. The difference calculation unit 24 outputs the calculated difference to the motion ratio calculation unit 26.

(Calculation of closing rate)
The operation ratio calculation unit 26 calculates the operation ratio of the external air conditioner 4 in the time zone D based on the calculated load and difference, and outputs the operation ratio to the demand calculation unit 28, the operation number calculation unit 30, and the output unit 32 ( Step S5). In the present embodiment, as the operation ratio, the ratio of the time during which the external air conditioner 4 stops (closes) in a specific time period including the time period D is calculated. Hereinafter, this time ratio is expressed as a closed ratio. For example, when the time zone D is 1 hour from 7 o'clock to 8 o'clock and the closing ratio is 33%, the external air conditioner 4 is 33% of the hour in the time zone D, that is, It means that it does not operate for 1/3 hour.

  FIG. 5 is a flowchart showing the flow of processing when the air conditioning control device 1 calculates the closing ratio in the present embodiment. As shown in this figure, first, the motion ratio calculation unit 26 determines whether or not the load that can be reduced calculated by the load calculation unit 22 is greater than zero (step S11). When the result of the determination in step S11 is “No” (No), the operating number calculation unit 30 determines the closing ratio to be zero (step S12). Thereby, the calculation process of the closing ratio ends.

  If the result of determination in step S11 is “false”, the load that can be reduced in time zone D is zero or less. This means that the inside air enthalpy is equal to or greater than the outside air enthalpy, that is, the heat energy of the outside air is equal to or less than the heat energy of the inside air. In this case, even if outside air is taken into the room as it is, the room temperature does not change at all or decreases. Accordingly, since the external air conditioner 4 does not need to cool the outside air, no load is applied to each refrigerator 8 no matter how much the external air conditioner 4 operates. Therefore, the operation ratio calculation unit 26 determines that the external air conditioner 4 operates completely in the time zone D by determining the closing ratio to be zero. The complete operation here means that the external air conditioner 4 continues to operate without stopping at all in the time zone D.

  On the other hand, when the result of the determination in step S11 is “true” (Yes), the motion ratio calculation unit 26 determines whether or not the difference is greater than zero (step S13). When the result of determination in step S13 is “false” (No), the difference calculation unit 24 determines the closing ratio to be the minimum closing ratio (step S14). Thereby, the calculation process of the closing ratio ends.

  If the result of determination in step S13 is “false”, the upper limit capacity of one refrigerator 8 in time zone D is equal to or greater than the cold water demand in time zone D. This means that it is desirable to operate the external air conditioner 4 as much as possible because the capacity of the refrigerator 8 has a margin. On the other hand, operating the air conditioner 4 excessively is not preferable because it increases the power consumption of the air conditioner 4 and the load of the refrigerator 8 respectively. Therefore, the operation ratio calculation unit 26 determines that the closing ratio is the minimum closing ratio, so that a certain amount of outside air is taken into the living room 2 in the time zone D. Thereby, reduction of the power consumption of the external air conditioner 4 and the load of the refrigerator 8 is realizable, suppressing the raise of the carbon dioxide concentration in the living room 2. FIG.

  On the other hand, when the result of determination in step S13 is “true” (Yes), the operation ratio calculation unit 26 calculates the closing ratio (%) of the external air conditioner 4 in the time zone D based on the ratio of the difference to the load. (Step S15). In the present embodiment, the movement ratio calculation unit 26 calculates the closing ratio by using the formula: closing ratio = difference / load × 100.

  The closing ratio calculated by this equation matches the value occupied by the difference between the predicted demand and the upper limit capacity among the loads that can be reduced when the external air compressor 4 is completely stopped in the time zone D. Therefore, if the external air conditioner 4 is stopped in the time zone D by the closed ratio in one hour, the load actually reduced in the time zone D matches the difference between the predicted demand and the upper limit capacity. The actual demand in the time zone D is a value obtained by subtracting the load actually reduced in the time zone D from the predicted demand. Therefore, the actual cold water demand in the time zone D theoretically matches the upper limit capacity of one refrigerator 8. That is, in the present embodiment, the closing rate calculated by the operating rate calculating unit 26 is an operating rate that allows one refrigerator 8 to operate at the limit of the upper limit capacity.

  The movement ratio calculation unit 26 determines whether or not the calculated closing ratio is smaller than the minimum closing ratio (step S16). When the result of determination in step S16 is “true” (Yes), the motion ratio calculation unit 26 determines the closing ratio as the minimum closing ratio (step S14). This is a measure for preventing the external air conditioner 4 from operating excessively in the time zone D as a result of the calculated closing ratio being too small and the power consumption thereof becoming too high. Thereby, the calculation process of the closing ratio ends.

  On the other hand, when the result of determination in step S16 is “false” (No), the motion ratio calculation unit 26 calculates whether or not the calculated closing ratio is larger than the maximum closing ratio (step S17). When the result of the determination in step S17 is “true” (Yes), the movement ratio calculation unit 26 determines the closing ratio as the maximum closing ratio (step S18). This is because, if the calculated closing rate is too high, the external air conditioner 4 does not operate sufficiently in the time zone D, and as a result, the carbon dioxide concentration in the living room 2 is prevented from excessively rising. This is a measure. Thereby, the calculation process of the closing ratio ends.

  On the other hand, when the result of determination in step S17 is “false” (No), that is, when the calculated closing rate is not less than the minimum closing rate and not more than the maximum closing rate, the operation rate calculating unit 26 calculates the closing rate. The value is determined (step S19). Thereby, the calculation process of the closing ratio ends.

(Calculation of chilled water demand after external air conditioner 4 control)
The operation ratio calculation unit 26 outputs the closing ratio finally determined in step S5 to the demand calculation unit 28 and the operation number calculation unit 30. The demand calculation unit 28 calculates the cold water demand when the external air conditioner 4 is controlled in the time zone D (step S6) and outputs the cold water demand to the output unit 32. This process will be described below with reference to FIG.

  FIG. 6 is a flowchart for explaining the flow of processing when the air conditioning control device 1 according to the present embodiment calculates the cold water demand when the external air conditioner 4 is controlled in the time zone D. As shown in this figure, the demand calculation unit 28 first calculates the cold water demand when the external air conditioner 4 is controlled in the time zone D based on the predicted demand in the time zone D and the closing ratio in the time zone D. (Step S21). At this time, the demand calculation unit 28 uses the following formula: cold water demand in time zone D = predicted demand−closed ratio × reducible load / 100. When the closing rate is not less than the minimum closing rate and not more than the maximum closing rate, the cold water demand calculated at this time theoretically matches the upper limit capacity of one refrigerator 8.

  The demand calculation unit 28 determines whether or not the calculated cold water demand is greater than zero (step S22). When the result of determination in step S is “true” (Yes), the cold water demand calculation process is terminated. On the other hand, when the determination result in step S is “false” (No), the demand calculation unit 28 calculates the cold water demand when the external air conditioner 4 is controlled based on the maximum outside air load ratio with respect to the predicted cold water demand. (Step S23). The demand calculation unit 28 discards the value calculated in step S21 and determines the value calculated in step S23 as the cold water demand in the time zone D.

  In the time zone in which the external air conditioner 4 operates, the cold water demand must be present. Therefore, the cold water demand calculated in step S21 cannot be zero or less. However, it can be calculated as such for the convenience of calculation. For example, this is the case when the load that can be reduced by the control of the external air conditioner 4 is calculated too high. In this case, the value of the closing ratio is calculated to be very small, and as a result, the closing ratio is determined as the minimum closing ratio. Then, a case where the value of load that can be reduced × minimum closing ratio ÷ 100 becomes more than the predicted demand occurs.

  Therefore, when the calculated chilled water demand is zero or less, the demand calculating unit 28 calculates the chilled water demand in the time zone D using the formula: chilled water demand = predicted demand × (100−maximum outside air load ratio) ÷ 100. . As a result, a value obtained by removing the load necessary for the outside air conditioner 4 to process the outside air from the predicted demand is calculated as the cold water demand in the time zone D.

(Calculation of the number of operating refrigerators 8)
The number of operating units calculation unit 30 calculates the number of operating units of the refrigerator 8 when the external air conditioner 4 is controlled in the time zone D (step S7). This process will be described below with reference to FIG.

  FIG. 7 is a flowchart for explaining the flow of processing when calculating the number of operating refrigerators 8 when the operating number calculating unit 30 controls the external air conditioner 4 in the time zone D in the present embodiment. . As shown in this figure, the operating number calculation unit 30 first determines whether or not the cold water demand when the external air conditioner 4 is controlled exceeds the upper limit capacity of one refrigerator 8 (step S31). ). When the result of the determination in step S31 is “true” (Yes), the demand calculation unit 28 determines the number of operating refrigerators 8 to be two (step S32). This is because even if the external air conditioner 4 is controlled, the single refrigerator 8 still cannot supply enough cold water to meet the demand.

  On the other hand, when the result of the determination in step S31 is “false” (No), the operating number calculation unit 30 determines the operating number of the refrigerators 8 to be one (step S33). At this time, the cold water demand theoretically matches the upper limit capacity of one vehicle. Therefore, one refrigerator 8 to be operated operates with high efficiency.

(Control signal output)
The output unit 32 generates and outputs a predetermined control signal based on the operation ratio of the external air conditioner 4, the cold water demand when the external air conditioner 4 is controlled, and the number of the refrigerators 8 operated. Specifically, first, a control signal that instructs to operate in the time zone D based on the calculated closing ratio is output to the external air handler 4. After receiving the control signal, the external air conditioner 4 changes its setting so that it operates based on the closing rate indicated by the control signal when the current time is the start time in the time zone D. To do. In other words, only the closing ratio of the time zone D is stopped.

  Further, the output unit 32 outputs a control signal instructing that the calculated number of refrigerators 8 operate in the time zone D to each refrigerator 8. Specifically, when the number of operating units is two, the output unit 32 outputs a control signal instructing each refrigerator 8 to operate in the time zone D. On the other hand, when the number of operating units is one, a control signal instructing one refrigerator 8 to operate in the time zone D is output, and the other refrigerator 8 is stopped in the time zone D. A control signal instructing to do is output. Each refrigerator 8 operates or stops based on the content instructed by the control signal when the current time is the start time in the time zone D. This ensures that the number of refrigerators 8 operating in the time zone D matches the calculated number of operating units.

  The output of the control signal by the output unit 32 may not be performed immediately after the calculation of the operation ratio or the like. For example, it may be output to the external air compressor 4 and the refrigerator 8 immediately after the start time of the time zone D is reached. In this case, the external air conditioner 4 and the refrigerator 8 change the operation content based on the control signal immediately after receiving the control signal.

  The air conditioning control device 1 repeatedly executes a series of processes shown in FIG. 4 for each time zone in which the external air conditioner 4 operates. As a result, the closing ratio, the cold water demand, and the number of operating refrigerators 8 in the entire time zone in which the external air conditioner 4 operates are calculated.

(Control example)
FIG. 8 shows a case in which the air conditioning control system 100 according to the present embodiment controls the time zone for a specific day, the predicted demand for cold water calculated by the air conditioning control device 1, and the external air conditioner 4. It is a graph which shows the example of the relationship with cold water demand and a closing rate. In this figure, 48 indicates the closing ratio of the external air conditioner 4 in each time zone. Moreover, 50 shows the cold water demand at the time of controlling the external air handler 4 in each time slot | zone. Reference numerals 52 and 54 denote a minimum closing ratio and a maximum closing ratio, respectively.

  The external air conditioner 4 and the refrigerator 8 are controlled in each time zone as shown in the graph of FIG. The external air conditioner 4 operates during the time zone from 7 o'clock to 17 o'clock and does not operate during other time zones. Therefore, in FIG. 8, the closing ratio is not shown in the time zone from the time zone of 0 o'clock to the time zone of 6 o'clock and the time zone from the time zone of 18:00 to the time of 23 o'clock. The closing rate of the external air conditioner 4 in each time zone is always between the minimum closing rate 52 and the maximum closing rate 54.

  As shown in FIG. 8, the cold water demand 50 when the external air conditioner 4 is controlled is smaller than the predicted cold water demand 42 in each time zone in which the external air conditioner 4 operates. Therefore, the air-conditioning control apparatus 1 can reduce the power consumption in the external air conditioner 4 by transmitting a control signal based on the closing ratio of each time zone to the external air conditioner 4.

  In addition, in the time zone of 6 o'clock, the time zone of 10 o'clock, and the time zone of 12 o'clock to 16 o'clock, cold water demand 50 when the external air conditioner 4 is controlled is refrigeration for one unit. It is almost equal to or slightly below the upper limit capacity 44 of the machine 8. Therefore, in these time zones, the number of operating refrigerators 8 can be adjusted to one. Thereby, since it is not necessary to operate another refrigerator 8, power consumption can be reduced accordingly. Furthermore, since the cold water demand is approximately equal to or slightly lower than the upper limit capacity of one operating refrigerator 8, one refrigerator 8 operates with high efficiency.

  As described above, in this embodiment, the air conditioning control device 1 reduces the power consumption of the external air conditioner 4 and can operate the refrigerator 8 with high efficiency. And the number of operating refrigerators 8 can be calculated respectively. Further, based on the calculation result, the operation of the external air conditioner 4 can be controlled so that the refrigerator 8 operates with high efficiency. Thereby, the efficient air-conditioning control system 100 is realizable.

(Control of cooling tower 10)
As described above, in the air conditioning control system 100, the cooling tower 10 is provided for each refrigerator 8. It is a waste of electric power to operate the corresponding cooling tower 10 in the time zone when a certain refrigerator 8 stops. Therefore, the air conditioning control device 1 may generate a control signal instructing the operation or stop of the cooling tower 10 based on the calculated number of operating refrigerators 8 and transmit it to each cooling tower 10. For example, when a control signal instructing to stop in a time zone D is transmitted to a certain refrigerator 8, a control signal instructing to stop in a time zone D also to the corresponding cooling tower 10 Send. Thereby, compared with the case where only the refrigerator 8 is stopped, more power consumption can be reduced.

  In the air conditioning control system 100, each refrigerator 8 is also provided with a corresponding pump 14 and 18. Therefore, when the output unit 32 transmits a control signal instructing to stop in the time zone D to a certain refrigerator 8, it also stops in the time zone D to the corresponding pumps 14 and 18. A control signal instructing may be transmitted. Thereby, power consumption can be further reduced.

(Manual control)
The air conditioning control device 1 does not necessarily need to output each control signal described above. That is, the air conditioning control device 1 does not have to automatically control the external air conditioner 4, the refrigerator 8, and the cooling tower 10. Instead, the air conditioning control device 1 outputs the calculated closing ratio of the external air conditioner 4, cold water demand, and the number of operating refrigerators 8 as data. For example, the tabular data shown in FIG. 9 is generated and output to the display device. FIG. 9 is a diagram showing data in a tabular format for the closing ratio of the external air conditioner 4 and the number of operating refrigerators 8 in each time zone in the present embodiment. An administrator of the air conditioning control system 100 visually controls the tabular data and manually controls the external air conditioner 4 and the refrigerator 8. For example, it is manually set in the external air handler 4 to operate based on the calculated closing ratio in each time zone. Further, whether to operate or stop in each time zone is manually set in each refrigerator 8. Even with such manual control, the operation of the external air conditioner 4 can be controlled so that the refrigerator 8 operates with high efficiency.

[Embodiment 2]
A second embodiment according to the present invention will be described below. In addition, the same code | symbol is attached | subjected to each member which is common in 1st Embodiment mentioned above, and detailed description is abbreviate | omitted.

  Although not particularly illustrated, the air conditioning control system 100 according to the present embodiment includes a plurality of external air conditioners 4. Therefore, in the air conditioning control device 1, the parameter N is a number greater than 1.

  In the present embodiment, the operation ratio calculation unit 26 calculates the ratio of the external air conditioner 4 to be stopped among all the external air conditioners 4 in the time period D as the operation ratio of the external air conditioner 4 in the time period D. For example, when the number of the external air conditioners 4 is 10 and the calculated operation ratio is 30%, 70% (that is, 7) of the 10 external air conditioners 4 in the time zone D Is equivalent to fully operating, while the remaining 30% (ie 3 units) are completely stopped. The calculation method of the operation ratio is the same as the calculation method of the closing ratio in the first embodiment.

  The output unit 32 selects the external air conditioner 4 to be operated in the time zone D and the external air conditioner 4 to be stopped based on the calculated operation ratio. And the control signal which instruct | indicates to operate | move completely in the time slot | zone D is transmitted with respect to each external air handler 4 to operate | move. On the other hand, a control signal instructing to stop completely in the time zone D is transmitted to each external air conditioner 4 to be stopped. As a result, for example, in time zone D, seven of the ten external air handlers 4 continue to operate, and the remaining three units completely stop. The load actually reduced in the time zone D by this control is equal to the load in the case where the closing rate of 30% is calculated as the number of operating units, and the operation of all the external air conditioners 4 is controlled based on this closing rate. In any case, 30% of the load that can be reduced when all the external air conditioners 4 are completely stopped in the time zone D is actually reduced in the time zone D.

  Therefore, also in this embodiment, the actual cold water demand when each external air handler 4 is controlled in the time zone D theoretically matches the upper limit capacity of the refrigerator 8 for one unit. Therefore, the air conditioning control device 1 can control the operation of each external air conditioner 4 so that the refrigerator 8 operates with high efficiency. Thereby, the efficient air-conditioning control system 100 is realizable.

[Embodiment 3]
A third embodiment according to the present invention will be described below with reference to FIG. In addition, the same code | symbol is attached | subjected to each member which is common in 1st Embodiment mentioned above, and detailed description is abbreviate | omitted.

  Although not particularly illustrated, the air conditioning control system 100 according to the present embodiment includes three refrigerators 8. Therefore, cold water corresponding to the total of the upper limit capacities of the three refrigerators 8 can be supplied to the internal air conditioner 6 and the external air conditioner 4 at the maximum.

  FIG. 10 is a graph showing an example of the relationship between the time zone for a day on a specific day and the cold water demand in the air conditioning control system 100 according to the present embodiment. In this figure, the horizontal axis indicates the time zone (h), and the vertical axis indicates the cold water demand (MJ / h). In addition, the member number 54 indicates the upper limit capacity of the refrigerator 8 for one unit, the member number 56 indicates the upper limit capacity of the refrigerator 8 for two units, the member number 48 is the total 56 of the predicted demand 42 and the upper limit capacity. The difference 46 is shown.

  In the present embodiment, the air-conditioning control device 1 controls the number of the external air conditioners 4 so that two of the three refrigerators 8 operate at a level just below the upper limit capacity. In order to realize this, the difference calculation unit 24 calculates a difference 58 between the total upper limit capacity 56 of the two refrigerators 8 and the predicted cold water demand 42 in the time zone D. Thereby, when operation | movement of the external air handler 4 is controlled in the time slot | zone D based on the calculated closing rate, the actual cold water demand in the time slot | zone D will correspond theoretically to the sum 56 of upper limit capacity | capacitance theoretically. .

  The air conditioning control device 1 according to the present embodiment uses the ratio of the difference with respect to the load that can be reduced when the external air conditioner 4 is completely stopped in the time zone D as the closing rate of the external air conditioner 4 in the time zone D. calculate. Therefore, if the external air conditioner 4 is stopped by the closing rate in the time zone D, the load actually reduced in the time zone D becomes equal to the difference.

  In the time zone D, the actual demand for chilled water when the external controller 4 is controlled based on the closed ratio is a value obtained by subtracting the load (= difference) actually reduced in the time zone D from the predicted demand. . Since the predicted demand is the sum of the upper limit capacities of the refrigerators 8 for two units (predetermined number), the actual cold water demand in the time zone D is the upper limit capability of the heat source devices for two units. Theoretically matches the total. That is, the closed ratio calculated by the air conditioning control device 1 is a closed ratio that enables the two refrigerators 8 to operate at the limit of the upper limit capacity in the time zone D. The air-conditioning control device 1 determines whether or not the cold water demand when the external air conditioner 4 is controlled in the time zone D exceeds the total of the upper limit capacities of the two refrigerators 8. And when exceeding, the number of operation | movement of the refrigerator 8 is determined to 3 units, and when that is not right, it determines to 2 units | sets. In the latter case, the two refrigerators 8 to be operated operate with high efficiency.

  As described above, also in the present embodiment, the air-conditioning control apparatus 1 reduces the power consumption of the external air conditioner 4 and can operate each refrigerator 8 with high efficiency. The operation ratio and the number of operating refrigerators 8 can be calculated respectively.

[Embodiment 4]
A fourth embodiment according to the present invention will be described below with reference to FIG. In addition, the same code | symbol is attached | subjected to each member which is common in the 1st to 3rd embodiment mentioned above, and detailed description is abbreviate | omitted.

  In the present embodiment, the air-conditioning control apparatus 1 targets only the time period for the latest one hour, the closing rate of the external air conditioner 4, the cold water demand when the operation of the external air conditioner 4 is controlled, and the refrigerator 8 Calculate the number of operating units. Thereby, compared with the case where the closing ratio etc. in each time slot | zone from the operation start time of the refrigerator 8 to the operation end time are calculated collectively, the time required to complete the calculation can be shortened.

  FIG. 11 shows a case where the air conditioning control system 100 according to the present embodiment controls the time zone for a day on a specific day, the predicted demand for cold water calculated by the air conditioning control device 1, and the external air conditioner 4. It is a graph which shows the example of the relationship with cold water demand and a closing rate. In this figure, 48 indicates the closing ratio of the external air conditioner 4 in each time zone. Moreover, 50 shows the cold water demand at the time of controlling the external air handler 4 in each time slot | zone.

  In the example shown in FIG. 11, the air-conditioning control apparatus 1 has completed the calculation of the closing rate up to 11:00 on a specific day for each time zone in the time zone immediately before that. The air-conditioning control device 1 closes the external air conditioner 4 at 12 o'clock based on the predicted cold water demand at 12 o'clock, the predicted temperature of outside air, and the predicted temperature of outside air at 11 o'clock. The ratio, the cold water demand when the operation of the external air conditioner 4 is controlled, and the number of operating refrigerators 8 are calculated. Then, immediately after the 12 o'clock range starts, the control signals for the 12 o'clock range are collected and output to the refrigerator 8 and the cooling tower 10.

  The predicted cold water demand, the predicted outside air temperature, and the predicted outside air temperature at the 12 o'clock range are calculated by a predetermined simulator and provided to the air-conditioning control apparatus 1 at the 11 o'clock range, which is the time zone immediately before that. At this time, the simulator may calculate the predicted cold water demand, the predicted outside air temperature, and the predicted outside air temperature at 12 o'clock using the actual cold water demand at the 11:00 level, the measured temperature and the measured humidity of the outside air. Thereby, compared with the case where the cold water forecast demand for one day etc. are calculated collectively on the day before like 1st Embodiment, the precision of prediction can be improved. Therefore, the air-conditioning control apparatus 1 can more appropriately calculate the closing ratio in each time zone.

  Note that the air conditioning control device 1 may have the function of this simulator. In this case, a temperature sensor and a humidity sensor (not shown) are arranged outside the living room 2, and the air conditioning control device measures the current outside air temperature and outside air humidity using these sensors. Then, based on the measured value, the predicted temperature and predicted humidity of the outside air in the next time zone are calculated and used to calculate the load that can be reduced in the next time zone.

[Embodiment 5]
A fifth embodiment according to the present invention will be described below with reference to FIG. In addition, the same code | symbol is attached | subjected to each member which is common in the 1st-4th embodiment mentioned above, and detailed description is abbreviate | omitted.

  FIG. 12 is a block diagram illustrating a configuration of an air conditioning control system 100a according to the present embodiment. As shown in this figure, the air conditioning control system 100a includes an air conditioning control device 1, an external air conditioner 4, an internal air conditioner 6, two heaters 8a (heat source equipment), two pumps 12, and two pumps 14. , A header 16 and a header 18.

  The air conditioning control system 100 a is a system that controls the air conditioning in the living room 2. The air conditioning control in the present embodiment is heating of the living room 2. The internal air conditioner 6 takes in the air in the living room 2 into itself and warms it or provides it to the living room 2 again. Thereby, the inside of the living room 2 is heated. The external air conditioner 4 takes the outside air of the living room 2 into the living room 2. Thereby, the air in the living room 2 is circulated, and the increase in the carbon dioxide concentration in the living room 2 is prevented.

  Both the internal air conditioner 6 and the external air conditioner 4 warm the air using hot water. In the air conditioning control system 100a, the two heaters 8a provide hot water to the internal air conditioner 6 and the external air conditioner 4.

  In the air conditioning control system 100, the heater 8 a consumes electric power to warm water and sends it to the header 16 through the pump 14. The header 16 sends hot water to the internal air conditioner 6 and the external air conditioner 4. The hot water used for heating the air in the internal air conditioner 6 and the external air conditioner 4 is sent to the header 18. The header 18 is a water passage where the sent water merges. Each pump 20 is operating during operation of the corresponding heater 8 and provides the water in the header 18 to the corresponding heater 8a. The heater 8a heats the water thus circulated again.

  The control of the external air conditioner 4 and the heater 8a in the air conditioning control system 100a is basically the same as that of the air conditioning control system 100 according to the first embodiment. However, since there are some differences, the differences will be described below.

  In the present embodiment, the upper limit capacity of the heater 8a is stored in advance in the memory of the air conditioning control device 1 as a parameter. Based on the calculated inside air enthalpy and outside air enthalpy, the load calculating unit 22 calculates the time from the two heaters 8a that supply the heat medium to the external air conditioner 4 when the external air conditioner 4 does not operate in the time zone D. The load reduced in the band D is calculated. At that time, the load calculation unit 22 uses the following equation.

L = (E _in −E _out ) × W × M × 1000 × N
In this equation, L is a load, E _in is an inside air enthalpy, E _out is an outside air enthalpy, W is a rated air volume in the vicinity of the outlet of the external air conditioner 4, and M is near the outlet of the external air conditioner 4. N is the number of external air conditioners 4. In this embodiment, since the heater 8a heats the outside air using hot water, the outside air temperature is usually lower than the inside air, that is, the inside air enthalpy is larger than the outside air enthalpy. Therefore, the load calculation unit 22 subtracts the outside air enthalpy from the inside air enthalpy in order to calculate the load value that can be reduced as a positive value.

  The difference calculation unit 24 calculates the difference between the upper limit capacity of one heater 8a and the predicted demand for hot water in the time zone D.

  Except for the load and difference calculation processing, the processing is the same as in the first embodiment. Therefore, in this embodiment, the air-conditioning control apparatus 1 can control the operation of the external air conditioner 4 so that the heater 8a operates with high efficiency. Thereby, the efficient air-conditioning control system 100a is realizable.

[Example of software implementation]
The control block of the air conditioning control device 1 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software using a CPU (Central Processing Unit).

  In the latter case, the air conditioning control device 1 includes a CPU that executes instructions of a program that is software that implements each function, and a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by the computer (or CPU). Alternatively, a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) that expands the program, and the like are provided. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  For example, the air conditioning control system 100 may be configured as shown in FIG. FIG. 13 is a diagram illustrating a modification of the air conditioning control system 100 according to each of the first to fourth embodiments. In the example shown in this figure, each pump 14 does not correspond to only one refrigerator 8, but both correspond to both two pumps 14. In other words, each pump 14 is connected to each refrigerator 8 so that cold water can be sucked from the two refrigerators 8. The cold water sent from each refrigerator 8 joins once before entering each pump 14. The combined cold water is then divided again and enters each pump 14. Each pump 14 is connected to the header 16 through a common water channel. The cold water sent from each pump 14 does not individually enter the header 16, but once joins in a common water channel and then enters the header 16. When both the two refrigerators 8 operate, both the two pumps 14 also operate. On the other hand, when only one of the refrigerators 8 operates, only one of the pumps 14 operates.

  Moreover, in the example shown in FIG. 13, each pump 20 is connected to the header 18 through a common water channel. The water sent from the header 18 branches in the middle of the common water channel and enters each pump 20. Each pump 20 is connected only to the corresponding refrigerator 8 as in FIG. However, like the pump 14 shown in FIG. 13, each pump 20 may be connected to both of the two refrigerators 8 through a common water channel. When both of the two refrigerators 8 operate, both of the two pumps 120 operate. On the other hand, when only one of the refrigerators 8 operates, only one corresponding pump 20 operates.

  In the air conditioning control system 100a according to the fifth embodiment, the two pumps 143 and the two pumps 20 can be configured as shown in FIG.

  Further, the air conditioning control device 1 may control the external air conditioner 4 and the like in real time. In this case, the air conditioning control apparatus 1 measures the current actual outside air temperature and outside air humidity using a temperature sensor and a humidity sensor (not shown) provided outside the living room 2. Then, the actual actual outside air enthalpy is calculated using the actual outside air temperature and outside air humidity. Further, using the calculated outside air enthalpy, a load that can be reduced when the outside air conditioner 4 is stopped at the present time is calculated. Further, the closed ratio of the external air conditioner 4 at the present time is calculated using the calculated load, and a control signal based on the result is immediately output to the external air conditioner 4. Thereby, operation | movement of the external air handler 4 is controlled in real time based on the calculated closing rate.

  Further, the air conditioning control device 1 may calculate the degree of opening of the damper provided in the external air conditioner 4 as the operation ratio of the external air conditioner 4. Or when the external air conditioner 4 is provided with the inverter which controls a fan, you may calculate the operating frequency of the inverter. In any case, by controlling the operation of the external air conditioner 4 based on the calculated openness or frequency, the openness is such that the load actually reduced in the time zone D becomes equal to the calculated difference. Or the frequency is calculated.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as an information processing apparatus that generates information for controlling an external air conditioner and a heat source device that constitute an air conditioning control system.

1 Air conditioning control device (information processing device)
2 Living room 4 Internal air conditioner 6 External air conditioner 8 Refrigerator (heat source equipment)
8a Heater (heat source equipment)
10 cooling tower 22 load calculation unit (load calculation means, inside air enthalpy calculation means, outside air enthalpy calculation means)
24 Difference calculation unit (difference calculation means)
26 motion ratio calculation unit (motion ratio calculation means)
28 Demand calculation section (demand calculation means)
30 Number-of-operations calculation section (number-of-operations calculation means)
32 output section (first output means, second output means)
100, 100a air conditioning control system

Claims (15)

Load calculating means for calculating a load reduced in the specific time period from a plurality of heat source devices that supply a heat medium to the external conditioner when the external air conditioner does not operate in a specific time period;
A difference calculating means for calculating a difference between the total of the upper limit capacities of the predetermined number of the heat source devices and the predicted demand of the heat medium in the specific time zone;
An operation ratio calculating means for calculating an operation ratio of the external air conditioner in the specific time period based on a ratio of the difference with respect to the load;
Demand calculating means for calculating the demand for the heat medium when the external air conditioner operates based on the operating ratio in the specific time zone based on the predicted demand and the operating ratio;
When the demand does not exceed the total of the upper limit capacities of the predetermined number of the heat source devices, an operation number calculating means for calculating the predetermined number as the number of operating the heat source devices in the specific time zone is provided. An information processing apparatus characterized by the above.   The information processing apparatus according to claim 1, further comprising a first output unit that outputs a control signal instructing operation based on the operation ratio to the external air conditioner.   2. The information according to claim 1, further comprising: a second output unit that outputs a control signal instructing to operate the number of the operating units in the specific time zone to the plurality of heat source devices. Processing equipment.   The information processing apparatus according to claim 1, wherein the movement ratio calculation unit calculates a ratio of time during which the external air conditioner stops in the specific time period as the movement ratio.   2. The information processing according to claim 1, wherein the operation ratio calculation unit calculates, as the operation ratio, a ratio of the external air conditioner that stops in the plurality of external air conditioners in the specific time zone. apparatus. Inside air enthalpy calculating means for calculating inside air enthalpy in the vicinity of the outlet of the external air conditioner,
An outside air enthalpy calculating means for calculating the outside air enthalpy in the specific time zone,
The information processing apparatus according to claim 1, wherein the load calculating unit calculates the load based on the inside air enthalpy and the outside air enthalpy.   The information processing apparatus according to claim 6, wherein the inside air enthalpy calculating unit calculates the inside air enthalpy based on a predetermined temperature and humidity near the outlet.   The information processing apparatus according to claim 6, wherein the outside air enthalpy calculating unit calculates the outside air enthalpy based on a predicted temperature and predicted humidity of the outside air in the specific time zone. The plurality of heat source devices are refrigerators,
The information processing apparatus according to claim 6, wherein the load calculating unit calculates the load based on a value obtained by subtracting the inside air enthalpy from the outside air enthalpy. The plurality of heat source devices are heaters,
The information processing apparatus according to claim 6, wherein the load calculation unit calculates the load based on a value obtained by subtracting the outside air enthalpy from the inside air enthalpy. The operation ratio is a ratio for stopping the external air conditioner,
The operating rate calculating means determines the operating rate as the minimum operating rate when the calculated operating rate is lower than a predetermined minimum operating rate based on a carbon dioxide concentration near the outlet of the external air conditioner. The information processing apparatus according to claim 1 . The operation ratio is a ratio for stopping the external air conditioner,
The operation ratio calculation means determines the operation ratio as the maximum operation ratio when the calculated operation ratio exceeds a predetermined maximum operation ratio based on the carbon dioxide concentration near the outlet of the external air conditioner. The information processing apparatus according to claim 1. A load calculating step of calculating a load reduced in the specific time period from a plurality of heat source devices that supply a heat medium to the external conditioner when the external conditioner does not operate in a specific time period;
A difference calculating step of calculating a difference between the total of the upper limit capacities of the predetermined number of the heat source devices and the predicted demand of the heat medium in the specific time zone;
Based on the load and the difference, an operation ratio calculating step for calculating an operation ratio of the external air conditioner in the specific time zone;
Based on the predicted demand and the operation ratio, a demand calculation step of calculating the demand for the heat medium when the external air conditioner operates based on the operation ratio in the specific time zone;
An operation number calculating step of calculating the predetermined number as the number of operating the heat source devices in the specific time zone when the demand does not exceed the total of the upper limit capacities of the predetermined number of the heat source devices . An information processing method characterized by the above.   A program for causing the information processing apparatus according to claim 1 to operate, the program causing a computer to function as each of the units included in the information processing apparatus.   The computer-readable recording medium which has recorded the program of Claim 14.

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