JP2014238197A - Air conditioning control method and air conditioning control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to keep an air conditioned room at a safe temperature and realize energy saving of an air conditioner.SOLUTION: An air conditioning control method by a system for changing a preset first blow temperature of an air conditioner cooling an ICT device to a second blow temperature, comprises: a first step of estimating a first intake temperature of the ICT device using the first blow temperature and a calculation formula for estimating the first intake temperature of the ICT device; a second step of estimating power consumption of the air conditioner using the first blow temperature and a calculation formula for estimating the power consumption of the air conditioner; a step of acquiring the second intake temperature by a sensor; a step of calculating an error between the second intake temperature and the estimated first intake temperature; and a step of setting the second blow temperature of the air conditioner using a calculation formula for estimating the first intake temperature, a calculation formula for estimating the power consumption, and the error.

Description

  The present invention relates to an air conditioning control method and an air conditioning control system, and more particularly to an air conditioning control method and an air conditioning control system for controlling air conditioning in a room in which a plurality of ICT devices such as a server room, a communication machine room, and a data center are installed. .

  Conventionally, there is an air conditioning control system for controlling a cooling air conditioner for cooling an ICT device in a server room, a communication machine room or a data center where a plurality of ICT (Information and Communication Technology) devices are installed. To do. In the conventional cooling air conditioning system, the set temperature of the air conditioner is set sufficiently low, the temperature in the vicinity of the ICT device is measured, and the set temperature of the air conditioner is controlled so as to be maintained at a constant temperature. In addition, using a simulator that models the relationship between the intake and blowout temperatures of the air conditioner and the intake and exhaust temperatures of the ICT device, the total power consumption of the air conditioner can be calculated while satisfying the temperature conditions of the intake temperature of the ICT device. There is a conventional technique in which the temperature of the air conditioner is set so as to minimize the energy consumption to save energy (see Non-Patent Document 1). The air-conditioned room refers to, for example, a server room in which a plurality of ICT devices and a rack in which a plurality of ICT devices are stored, and a communication machine room.

Asayasu Hiroshi, Nakajima Tadakatsu, Okitsu Jun, Kato Takeshi, Saito Tatsuya, Toshima Yasuhiro, “IT-linked air conditioning optimization control method for environment-friendly data center”, IEICE Transactions, B Vol.J95-B, No.3, pp.397-404, 2012 Tetsuo Ichimori, "Mathematical programming-Optimization technique", Kyoritsu Shuppan, p. 4, August 1994

  However, the conventional cooling air conditioning system has a problem that the power consumption of the air conditioner increases when the set temperature of the cooling air conditioner is lowered more than necessary. Further, in the method of minimizing power consumption using the simulator described in Non-Patent Document 1, if the simulator can sufficiently reflect the characteristics of the actual air-conditioning room, the actual air-conditioner outlet temperature can be It is possible to satisfy the temperature condition. However, the simulator usually contains model errors. Therefore, even if the air conditioner is operated at the outlet temperature calculated so as to satisfy the temperature condition of the ICT device, the actual suction temperature of the ICT device may be different from the suction temperature of the ICT device estimated by the simulator. is there. As a result, there is a problem that the temperature condition of the suction temperature of the ICT device cannot be satisfied and the ICT device may not be operated stably.

  The present invention has been made in view of such problems, and an object of the present invention is to provide an air-conditioning control method and an air-conditioning control method for maintaining an air-conditioned room at a safe temperature and further realizing energy saving of the air-conditioner. The object is to provide an air conditioning control system.

  As means for solving the above-mentioned problems, an air conditioner that controls the temperature of the ICT device and an air conditioner control system in which the air conditioner control device that controls the air conditioner are connected by a network acquire the air temperature of the air conditioner. Means, means for obtaining power consumption of the air conditioner, means for estimating the suction temperature of the ICT device from the blowing temperature of the air conditioner, means for estimating power consumption of the air conditioner from the blowing temperature of the air conditioner, and ICT device Means for obtaining an error between the measured value and the estimated value of the suction temperature of the ICT device, and the sum of the estimated value of the suction temperature of the ICT device and the error is not more than the upper limit temperature of the ICT device and minimizes the power consumption of the air conditioner And a means for determining a blow-off temperature of the air conditioner.

  In order to achieve such an object, the present invention provides an air conditioner that cools the ICT device when the suction temperature of the ICT device having a sensor exceeds a certain temperature. An air-conditioning control method using a system for changing a preset first blowing temperature to a second blowing temperature, the first blowing temperature and the first of the ICT device stored in advance in a storage unit. The first step of estimating the first suction temperature using the calculation formula for estimating the suction temperature of the air, the first blowing temperature, and the power consumption of the air conditioner stored in advance in the storage unit A second step of estimating the power consumption using a calculation formula for estimating a second suction temperature measured by the sensor of the ICT device, and the acquired second Suction temperature and the estimated first The second blowout of the air conditioner is calculated using the step of calculating an error from the intake temperature, a calculation formula for estimating the first suction temperature, a calculation formula for estimating the power consumption, and the error. And a step of setting the temperature.

  As described above, according to the present invention, the air conditioning room can be maintained at a safe temperature, and further, energy saving of the air conditioner can be realized. Also, by reflecting the difference between the measured value and estimated value of the suction temperature of the ICT device in the setting of the air temperature of the air conditioner, the air conditioning is performed with higher accuracy and the suction temperature of the ICT device does not exceed the upper limit value. The machine can be controlled.

It is a lineblock diagram showing an air-conditioning control system concerning one embodiment of the present invention. It is a block diagram showing an air-conditioner control device concerning one embodiment of the present invention. It is a flowchart which shows the air-conditioning control method concerning one Embodiment of this invention.

  Hereinafter, embodiments of the air conditioning control method and the air conditioning control system of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a configuration of an air conditioning control system according to an embodiment of the present invention. The air conditioning room 1 includes a plurality of ICT devices 2I _j and a plurality of air conditioners 3A _i that cool the ICT devices 2I _j . The air conditioner control device 4 that controls the blowing temperature of the air conditioner 3A _i , the plurality of ICT devices 2I _j, and the plurality of air conditioners 3A _i are connected by a network 5 such as a LAN (Local Area Network).

  The blowout temperature of the air conditioner is the temperature near the cold air outlet of the air conditioner. The air temperature of the air conditioner is measured by a temperature sensor installed near the air outlet of the air conditioner. The set temperature of the air conditioner is a target value of the blowing temperature, unlike the blowing temperature that is the actually measured temperature. What can actually be set by air conditioning is a set temperature, which is a target value of the blowing temperature, and it takes a certain amount of time for the blowing temperature to be equal to the set temperature.

ICT device 2I _j includes ICT device 2I ₁ ,... ICT device 2I _m (j = _{1 to m} , m is a positive integer). The ICT device 2I _j includes a temperature sensor unit that measures the suction temperature of the ICT device 2I _j . The ICT device 2I _j is, for example, an IT device such as a server or a communication device, and can be stored in a server rack.

  The suction temperature of the ICT device is the temperature near the opening that is sucked into the ICT device. The suction temperature of the ICT device is measured by a sensor installed in the vicinity of the opening that is sucked into the ICT device.

The air conditioner 3A _i includes air conditioners 3A ₁ ,... 3A _n (i = 1 to n, n is a positive integer). Air conditioner 3A _i, for example, consists of an indoor unit and an outdoor unit. In FIG. 1, the air conditioner is included in the air conditioning room, but the air conditioner may be provided in a room different from the air conditioning room and supply cold air to the ICT apparatus through a duct. Air conditioner 3A _i is capable of temperature setting for controlling the air temperature, measures the air temperature, the power consumption of the air conditioner 3A _i.

Air conditioner control device 4, or can set the SNMP (Simple Network Management Protocol) to gather information air temperature and power consumption of the air conditioner 3A _i by using a blowout temperature of the air conditioner 3A _i .

FIG. 2 shows a block diagram of an example of the air conditioner control device 4 according to one embodiment of the present invention. The air conditioner control device 4 includes an air conditioner information acquisition unit 41 that collects air conditioner blowout temperature information and air conditioner power consumption information from the air conditioner 3A _i via the LAN, and an ICT device suction temperature from the sensor of the ICT device. The ICT device suction temperature information acquisition unit 42 to receive, the storage unit 43 for storing information on the blowout temperature of the air conditioner, the information on the power consumption of the air conditioner, the information on the suction temperature of the ICT device, and the like of each ICT device 2I _j the estimated value of the suction temperature, the ICT device inlet temperature estimating unit 44 calculated from the equation described below, the estimate of the power consumption of each of the air conditioners 3A _i, and the air conditioner consumed power estimation unit 45 for calculating from the equation described below, satisfy certain temperature condition, and has air conditioner blow temperature setting unit for determining the air conditioner blow temperature to the sum of the power consumption of the air conditioner 3A _i is minimized and (calculating unit) 46, a.

The air conditioner information acquisition unit 41 collects air conditioner temperature information and power consumption information from the air conditioner 3A _i via the LAN. Further, when varying the outlet temperature of each air conditioner 3A _i, showing the relationship of inlet temperature of the ICT device 2I _j is represents what happens in the next equation (1).
_{T j = f j (S 1} , S 2, ... S n) j = 1~m ( Equation 1)
n is the number of air conditioners 3A _i, m is the number of ICT device 2I _j, T _j is the estimated value of the suction temperature of the ICT device 2I _j (first suction _{temperature), S 1, S 2,} ... S n is the air-conditioning outlet temperature of the machine 3A _i (first blow-out temperature), f _j is a function representing the inlet temperature of the ICT device 2I _j to variable outlet temperature of the air conditioner 3A _i. The ICT device suction temperature estimation unit 44 calculates an estimated value T _j of the suction temperature of each ICT device 2I _j from (Equation 1). The function f _j representing the suction temperature of the ICT device 2I _j is determined by the learning data stored in the storage unit 43 in advance, and is given by a linear expression of the blowout temperature S _i of the air conditioner 3A _{i in} a simple function. Can do.

The simplest form of the function f _j is shown by the following linear expression (Expression 2).
a ₁・ S ₁ + a ₂・ S ₂ +… + a _n・ S _n (Formula 2)
a _i (i = 1 to n, n is a positive integer) is a positive number, and a least square method is used to determine a _i .

Varying the outlet temperature of each air conditioner 3A _i, for changing over the suction temperature and time of the ICT device 2I _j, time different, the suction temperature of the air temperature and ICT device 2I _j of each of the air conditioners 3A _i Prepare multiple sets of data. A plurality of sets of data having different times are stored in the storage unit 43 as learning data.

It indicates a vector of data of measured values of the suction temperature of the ICT device 2I _j the following (Equation 3).
T = (T _j (1), T _j (2),…, T _j (k)) ^t (Formula 3)
The numbers in parentheses of T _j each represent time (for example, if the unit time is every 10 minutes, 1 represents 10 minutes, 2 represents 20 minutes), and t represents transposition.

Further, it shows a matrix of data of measured values of air temperature of each air conditioner 3A _i the following (Equation 4).

The numbers in parentheses of S ₁ , S ₂ ,... S _n each represent the same time as the time of T _j .

a _i vector A
A = (a ₁ , a ₂ ,…, a _n ) ^t (Formula 5)
Then,
A = (S ^t · S) ^-1 S ^t · T (Formula 6)
It becomes. Here, −1 represents an inverse matrix. The same process was performed for each ICT device 2I _j a _1, a _2, determines a ... a _n. Accordingly, the vector T consisting of data of the suction temperature of the ICT device 2I _j, and a matrix S including data of air temperature of each air conditioner _{3A i, a 1, a 2} , ..., it is possible to obtain the a _n, Functions f _j and (Equation 1) can be determined.

ICT suction temperature of the device 2I _j includes a blowing temperature of the air conditioner 3A _i, may be expression that the variable airflow volume of cooling air for cooling the ICT device 2I _j. Airflow volume of the air conditioner 3A _i is may be controlled in proportion to the cooling capacity of the air conditioner 3A _i (processing heat). The cooling capacity refers to the amount of heat (kW) that can be removed from the room per unit time when the air conditioner is cooled. Therefore, the cooling capacity of the air conditioner 3A _i after changing the set temperature of the air conditioner 3A _i is the airflow volume of previous setting temperature, the air temperature set point of the suction temperature and the air conditioner 3A _i of the air conditioner 3A _i Can be estimated. Therefore, the amount of blown air after the set temperature is changed can be estimated from the estimated value of the cooling capacity. When estimating the airflow volume after setting change from the estimated cooling capacity of the air conditioner 3A _i, the air conditioner information obtaining unit 41 obtains the airflow volume of the air conditioner 3A _i, ICT device inlet temperature information acquisition unit 42 Then, the actual suction temperature of the ICT device 2I _j is acquired.

Furthermore, the relational expression for estimating the power consumption of the air conditioner 3A _i when the air temperature of the air conditioner 3A _i is changed using the air temperature of the air conditioner acquired by the air conditioner information acquisition unit 41 is expressed as 7).
P _i = g _i (S _i ) i = 1 to n (Expression 7)

S _i is outlet temperature of the air conditioning unit 3A _i, P _i is the estimated value of power consumption in the air conditioner 3A _i, g _i is a function which represents the power consumption of the air conditioner 3A _i that the outlet temperature of the air-conditioner 3A _i as a variable is there. The air conditioner power consumption estimation unit 45 calculates an estimated value P _{i of the} power consumption of each air conditioner 3A _i from (Equation 7). A function representing the power consumption of the air conditioner 3A _i is also determined by learning data stored in the storage unit 43 in advance. In a simple function, it can be given by a linear expression of the blowing temperature S _i of the air conditioner 3A _i .

The simplest form of the function g _i is shown by the following linear expression (Expression 8).
b ₁・ S _i + b ₂ (Formula 8)
b ₁ is a negative number, b ₂ is a positive number, and the least square method is used to determine b ₁ and b ₂ .

When the air temperature of the air conditioner 3A _i is changed, the power consumption of the air conditioner 3A _i also changes with the passage of time, so the data of the air temperature of the air conditioner 3A _{i and} the power consumption of the air conditioner 3A _{i at} different times Prepare multiple sets. A plurality of sets of data having different times are stored in the storage unit 43 as learning data.

A vector composed of the data of the actually measured power consumption of the air conditioner 3A _i is shown in the following (Equation 9).
P = (P _i (1), P _i (2),…, P _i (k)) ^t (Equation 9)
The numbers in parentheses of P _i each represent time (for example, if the unit time is every 10 minutes, 1 represents 10 minutes, 2 represents 20 minutes), and t represents transposition.

Further, it shows a matrix of data of the actual measurement values of the air temperature of the air conditioner 3A _i the following equation (10).

Each of the numbers in the parentheses of the S _i represents the same time as the time of P _i.

b ₁ , b ₂ vector B
B = (b ₁ , b ₂ ) ^t (Formula 11)
Then,
B = (R ^t · R) ^-1 R ^t · P (Formula 12)
It becomes. Here, −1 represents an inverse matrix. The same process was performed for each air conditioner 3A _i determining b _1, b ₂ of each air conditioner 3A _i. Thus it is possible to determine the function g _i and each air conditioner 3A _i (Equation 7).

Estimation method of power consumption of the air conditioner 3A _i may estimated airflow volume after air temperature and the set temperature change of the air conditioner 3A _i as an expression whose variable. When estimating the power consumption of the air conditioner 3A _i using the estimated airflow volume after air temperature and the set temperature change of the air conditioner 3A _i, the air conditioner information obtaining unit 41 obtains the airflow volume of the air conditioner 3A _i , ICT device inlet temperature information acquisition unit 42 acquires the actual suction temperature of ICT device 2I _j.

When the outside air temperature rises or the load of any ICT device 2I _j increases and the temperature rises, for example, the air conditioner outlet temperature setting unit 46 deviates from the suction temperature condition of the ICT device 2I _j . satisfy the original temperature conditions, and obtains the air conditioner blow temperature to the sum of the power consumption of the air conditioner 3A _i is minimized. Mathematical programming is used as a method for determining the air blower temperature. Mathematical programming is a technique for obtaining a set of variables that minimizes or maximizes an arbitrary objective function under a constraint condition expressed by an arbitrary equality or inequality (see Non-Patent Document 2).

When using a mathematical programming as a method for determining the outlet temperature of the air conditioner, set of variables to determine is the outlet temperature of each air conditioner 3A _i, the objective function to be minimized is the sum of air conditioning power. The objective function is shown in the following (Formula 13).

The inequality constraint condition is shown in the following (Expression 14).
f _j (S ′ ₁ , S ′ ₂ ,... S ′ _n ) + D _j ≦ T ^# j = ^{1 to} m (Formula 14)
S ′ _i is the blowing temperature (second blowing temperature) of the air conditioner 3A _i to be obtained, and S ′ ₁ , S ′ ₂ ,... S ′ _n are combinations of the blowing temperatures of the air conditioner 3A _i to be found.

D _j is an actual value (second suction temperature) T _j ^* of the suction temperature of the ICT device 2I _j obtained as a result of the previous air conditioning setting, and an estimated value f _j (S ₁ , S of the suction temperature of the ICT device 2I _{j. 2} ,... S _n ) and is expressed by the following (Equation 15).
D _j = T _j ^* −f _j (S ₁ , S ₂ ,... Sn) j = _{1 to} m (Formula 15)
T ^# is the upper limit value of the suction temperature of the ICT device 2I _j, for example, 27 ° C..

If all objective functions and constraint expressions are linear, linear programming is used. If the objective function and constraint expressions are not linear, nonlinear programming is used. The blowing temperature of the air conditioner 3A _i obtained by the mathematical programming method is transmitted to the air conditioner 3A _i . Moreover, the estimated temperature value of each ICT device 2I _{j is obtained} from (Equation 1) using the obtained outlet temperature of the air conditioner 3A _i . After a certain time, which is the air conditioning control cycle, the suction temperature T _j ^* of each ICT device 2I _j is measured, the error D _j in (Equation 15) is obtained, and used for the calculation of the blowout temperature of the next air conditioner. The fixed time that is the air conditioning control cycle is, for example, 10 minutes.

FIG. 3 shows a flowchart of an air conditioning control method according to an embodiment of the present invention. Air conditioner information acquisition unit 41 collects the air temperature information of the air conditioner 3A _i, ICT device inlet temperature information acquisition unit 42 collects inlet temperature information of the ICT device 2I _j. The ICT device suction temperature estimation unit 44 determines (Equation 1) based on the collected outlet temperature information of the air conditioner 3A _i and the suction temperature information of the ICT device 2I _j (S100), and is determined (Equation 1). Is recorded in the storage unit 43.

Air conditioner information acquisition unit 41 collects power consumption information and outlet temperature information of the air conditioner 3A _i. The air conditioner power consumption estimation unit 45 determines (Equation 7) based on the collected power consumption information and blowing temperature information of the air conditioner 3A _i (S101), and the determined (Equation 7) is the storage unit 43. To be recorded.

In the initial state temperature error _{D j} of each ICT device 2I _j is 0 to (S102). Air conditioner blow temperature setting unit 46, the estimated value of the suction temperature of the ICT device 2I _j, read out from the storage unit 43, the calculation formula for estimating the suction temperature of the ICT device 2I _j (Equation 1), the air conditioner 3A _i The blowout temperature S _i of each air conditioner 3A _i is calculated by mathematical programming using the calculation formula (formula 7) for estimating the power consumption and the error D _j (S103). Specific mathematical formulas for mathematical programming in step S103 are shown in the following (formula 16) to (formula 19).

st
f ₁ (S ′ ₁ , S ′ ₂ ,... S ′ _n ) + D ₁ ≦ T ^# (Equation 17)
f ₂ (S ′ ₁ , S ′ ₂ ,... S ′ _n ) + D ₂ ≦ T ^# (Formula 18)
・
・
・
f _m (S ′ ₁ , S ′ ₂ ,... S ′ _n ) + D _m ≦ T ^# (Formula 19)

Air conditioner blow temperature setting unit 46 sends the calculated air temperature to the respective air conditioners 3A _i, sets the outlet temperature of each air conditioner 3A _i (S104). Then, ICT device suction temperature estimating unit 44 calculates the inlet temperature estimate for each ICT devices 2I _j using the calculated air conditioner blow temperature (S105). Each air conditioner 3A _i supplies air to each ICT device 2I _j at the set blowing temperature (S106). The ICT device suction temperature information acquisition unit 42 measures and acquires the actual suction temperature of each ICT device 2I _j after a lapse of a fixed time when the output of the air conditioner 3A _i is stabilized (S107). The fixed time during which the output of the air conditioner 3A _i is stabilized is, for example, 10 minutes. Air conditioner blow temperature setting unit 46 calculates the actual suction temperature of the ICT device 2I _j measured, the error Di between suction temperature estimate for each ICT device 2I _j calculated in step S105 (S108) . Returning to step S103 again, the air conditioner blow temperature setting unit 46, air outlet temperature S _'i of each air conditioner 3A _i using an error D _j calculated by the estimation equation and step S108 in the power consumption of each of the air conditioners 3A _i Is calculated by mathematical programming (S103).

With respect to the flowchart of FIG. 3, in one embodiment of the present invention, the loop after step S108 is continuously performed at regular intervals. In the air conditioning control system according to the embodiment of the present invention, the operation status of the ICT device, in other words, the heat generation status of the ICT device can be controlled without being directly monitored. It is possible to cope with a change in the heat generation status of the ICT device by performing control for correcting an increase or decrease in the error D _j caused by the change in the heat generation status of the ICT device.

The storage unit 43 includes a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM estimates a program and various data necessary for operation control of the entire air conditioner control device 4 (for example, a calculation formula for estimating the suction temperature of the ICT device 2I _j and the power consumption of the air conditioner 3A _i The calculation formula for doing this is recorded. The RAM is provided with a recording area for temporarily storing data and programs, and holds programs and data.

Further, the function f _j and the function g _i may be determined by incorporating the measurement function and the learning function necessary for the air conditioning control system of the present invention and then performing learning for function determination first. Alternatively, a function determined using another system may be stored in the air conditioning control system of the present invention.

  According to the present embodiment, the air conditioning room can be maintained at a safe temperature, and further, energy saving of the air conditioner can be realized.

  In addition, according to the present embodiment, the difference between the actual measured value and the estimated value of the suction temperature of the ICT device can be reflected in the setting of the blowout temperature of the air conditioner, which is more accurate and the suction temperature of the ICT device is higher. It is possible to control the air conditioner so as not to exceed the upper limit value.

1 air-conditioned room _{2I 1, 2I 2, 2I j} , 2I m ICT device _{3A 1, 3A 2, 3A i} , 3A n air conditioner 4 air conditioner controller 41 air conditioner information acquiring unit 42 ICT device inlet temperature information acquisition unit 43 stores Unit 44 ICT device suction temperature estimation unit 45 Air conditioner power consumption estimation unit 46 Air conditioner outlet temperature setting unit

Claims (8)

Air conditioning control by a system that changes the preset first blowing temperature of the air conditioner that cools the ICT device to the second blowing temperature when the suction temperature of the ICT device having the sensor exceeds a certain temperature A method,
A first step of estimating the first suction temperature using the first blow-off temperature and a calculation formula preliminarily stored in the storage unit for estimating the first suction temperature of the ICT device;
A second step of estimating the power consumption using the first blowing temperature and a calculation formula for estimating the power consumption of the air conditioner, which is stored in advance in the storage unit;
Obtaining a second suction temperature measured by the sensor of the ICT device;
Calculating an error between the acquired second suction temperature and the estimated first suction temperature;
Using the calculation formula for estimating the first suction temperature, the calculation formula for estimating the power consumption, and the error, and setting the second blowing temperature of the air conditioner. Air conditioning control method. The first step of estimating is:
2. The air conditioner according to claim 1, wherein the first suction temperature of the ICT device is estimated based on an air volume blown from the air conditioner instead of a calculation formula for estimating the first suction temperature. Control method. The second step of estimating comprises
3. The air conditioning control method according to claim 1, wherein the power consumption of the air conditioner is estimated based on an air volume blown from the air conditioner instead of a calculation formula for estimating the power consumption. 4. . As means for setting the second blowing temperature so that the sum of the second blowing temperature of the air conditioner and the error is equal to or lower than a predetermined upper limit temperature and the power consumption of the air conditioner is minimized. Using mathematical programming,
Using the condition that the power consumption of the air conditioner is minimum as the objective function of the mathematical programming method,
The air conditioning control method according to any one of claims 1 to 3, wherein a constraint that the sum is equal to or less than the upper limit temperature is used as an inequality constraint in the mathematical programming. An air conditioning control system that changes a preset first blowing temperature of an air conditioner that cools the ICT device to a second blowing temperature when the suction temperature of the ICT device having a sensor exceeds a certain temperature. There,
A first estimator for estimating the first suction temperature using the first blowing temperature and a calculation formula preliminarily stored in the storage unit for estimating the first suction temperature of the ICT device; ,
A second estimation unit that estimates the power consumption using the first blowing temperature and a calculation formula that is stored in advance in the storage unit and that estimates the power consumption of the air conditioner;
A second suction temperature measured by the sensor of the ICT device;
A calculation unit that calculates an error between the acquired second suction temperature and the estimated first suction temperature;
A setting unit for setting the second blowing temperature of the air conditioner using the calculation formula for estimating the first suction temperature, the calculation formula for estimating the power consumption, and the error. Air conditioning control system characterized by The first estimation unit includes:
6. The air conditioning according to claim 5, wherein the first suction temperature of the ICT device is estimated based on an air volume blown from the air conditioner instead of a calculation formula for estimating the first suction temperature. Control system. The second estimation unit includes
7. The air conditioning control system according to claim 5, wherein the power consumption of the air conditioner is estimated based on an amount of air blown from the air conditioner instead of a calculation formula for estimating the power consumption. 8. . As means for setting the second blowing temperature so that the sum of the second blowing temperature of the air conditioner and the error is equal to or lower than a predetermined upper limit temperature and the power consumption of the air conditioner is minimized. Using mathematical programming,
Using the condition that the power consumption of the air conditioner is minimum as the objective function of the mathematical programming method,
The air conditioning control system according to any one of claims 5 to 7, wherein a constraint condition that the sum is equal to or less than the upper limit temperature is used as an inequality constraint condition of the mathematical programming method.

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