KR20110019925A - System for controlling air-conditioning of subway coach using carbon dioxide concentration, and method for the same - Google Patents

Abstract

PURPOSE: A system and a method for controlling the air conditioning of a cabin using carbon dioxide concentration are provided to maintain indoor temperature by operating a cooling mode based on the amount of passengers. CONSTITUTION: A system(100) for controlling the air conditioning of a cabin using carbon dioxide concentration comprises a carbon dioxide sensor(110), a passenger number converter(130), a heating value calculator(140), a cabin cooling controller. The carbon dioxide sensor detects carbon dioxide concentration in a cabin. The passenger number converter converts the number of passengers corresponding to the detected carbon dioxide concentration. The heating value calculator calculates a total heating value of the passengers. The cabin cooling controller variously controls the operation of an air conditioner by comparing the calculated heating value with a standard heating value.

Description

System for controlling air-conditioning of subway coach using carbon dioxide concentration, and method for the same}

The present invention relates to a room cooling control system, and more particularly, to a room cooling control system and method using the carbon dioxide concentration to control the cooling of the room according to the carbon dioxide concentration in the subway or railway vehicle.

In general, due to the improved living standards, most homes or buildings as well as most vehicles are equipped with air conditioners for a pleasant indoor atmosphere. Each of these air conditioners is controlled and operated by the user's control or by the controller so as to output the cool air of a proper temperature. For example, the air conditioning control of the subway cabin is achieved by automatically adjusting the operation of the air conditioner by setting the desired temperature for cooling. In general, the room temperature sensor is attached to the wall of the room to sense the temperature of the room.

In recent years, both subway trains, which have excellent transportation capacity and improved convenience, are equipped with air conditioners and heating devices, contributing to the comfort of passengers. Most of such electric vehicle air conditioners have a manual cooling control method, but recently, the concept of automatic control has been introduced and implemented.

For example, the automatic air conditioning control device is an indoor / outdoor temperature sensor for detecting the indoor / outdoor temperature; A temperature controller for transmitting the indoor / outdoor temperature received from the indoor / outdoor temperature sensor to the train controller at predetermined time intervals using the indoor / outdoor temperature serial communication interface; A heating / cooling selection switch for selecting one of 1/3 heating mode, 2/3 heating mode, ventilation mode, semi-cooling mode, all-cooling mode, stop mode, and automatic mode; And it may be configured as a train control device for outputting a heating and cooling control signal based on the indoor / outdoor temperature transmitted through the serial communication interface at a predetermined time interval.

However, since the conventional air-conditioning unit or the control unit can control the entire vehicle of the electric vehicle only at a preset temperature, it cannot actively control the temperature in response to the temperature changing in real time in each vehicle of the electric vehicle, Accordingly, there is a problem in that each vehicle can not be maintained at the optimum room temperature.

On the other hand, as a related technology, Korean Patent Application No. 2007-141373 (Application Date: December 31, 2007) discloses the invention "air cooling device and its cooling method", which is related to the interior of the vehicle The best indoor cooling atmosphere by supplying or controlling optimally controlled cold air to the room by measuring and comparing each temperature in real time based on the temperature of various variables, that is, the discharge temperature, the suction temperature, the outdoor temperature, and the indoor temperature. It is about maintaining.

On the other hand, as a related art, Korean Patent Application No. 2004-44945 (filed date: June 17, 2004) discloses an invention named "indoor ventilation control device of a railway vehicle", the turbidity of the vehicle indoor air According to the present invention, the air is introduced only during the appropriate time, thereby preventing the cooling efficiency of the air conditioner from being lowered and reducing the noise during the introduction of the outside air, thereby maintaining a comfortable environment in the vehicle cabin. This will be described with reference.

1 is a diagram illustrating a subway vehicle in which the indoor ventilation control apparatus according to the related art is implemented.

Referring to FIG. 1, the indoor ventilation control apparatus according to the related art passes the indoor air sucked through the return duct 21 through an evaporator coil and discharges the cooled air back into the vehicle interior to provide cooling. It is applied to an air conditioner which performs ventilation by introducing air into the vehicle interior through an air damper.

The carbon dioxide concentration detecting unit 22 for detecting the carbon dioxide concentration in the vehicle interior air is installed on the return duct 21 side which sucks the air in the vehicle 10 to the evaporator coil side, and introduces air into the vehicle interior. The damper 23 is provided with an actuator for opening and closing the air damper 23. And a control unit 24 for controlling the actuator to open and close the air damper 23 from time to time according to the carbon dioxide concentration in the vehicle interior detected by the carbon dioxide concentration sensor 22 is provided.

Accordingly, when the carbon dioxide concentration in the air sucked through the return duct 21 becomes equal to or more than a predetermined reference value during the operation of the air conditioner, the carbon dioxide concentration detecting unit 22 detects this and the air in the vehicle interior becomes cloudy. It is recognized that the control unit 24 operates the actuator installed in the air damper 23 to open the air damper 23 so that fresh air is introduced into the vehicle interior for a predetermined time. When the fresh outside air flows into the vehicle interior and the carbon dioxide concentration in the vehicle interior falls below a predetermined reference value, the actuator closes the air damper 23 by the detection of the carbon dioxide concentration detector 22 and the control of the controller 24. By blocking the inflow of outside air. Therefore, the introduction of outside air into the interior of the vehicle can be selectively performed according to the carbon dioxide concentration in the interior of the vehicle. Therefore, ventilation is performed only for a suitable time, which does not adversely affect the cooling efficiency of the air conditioner. The noise generation time is also reduced by that amount.

However, as described above, according to the related art, since the degree of congestion in the cabin is not taken into account, there is a problem of causing thermal discomfort of the passenger by simply cooling based on the indoor / outdoor temperature near the wall.

For example, the results of temperature measurement near the walls inside the cabin are often different from the passengers' temperature experienced in the cabin, and in particular, the heat and frustration is often felt due to heat generation between passengers crowded during crowded times. have. In addition, when the number of passengers during the non-crowded time is sharply reduced, there is a problem that many people feel the cold due to excessive cooling.

Technical problem to be solved by the present invention for solving the above-mentioned problems, subway cabin cooling control system using a carbon dioxide concentration that can maintain a comfortable room temperature by operating the cooling mode based on the number of passengers reflecting the passenger congestion degree and its It is to provide a method.

Another technical problem to be achieved by the present invention is to provide a subway cabin air conditioning control system and method using carbon dioxide concentration that can save energy by efficiently using the cooling energy through the cooling of the passenger congestion center.

As a means for achieving the above technical problem, the subway cabin air conditioning control system using the carbon dioxide concentration according to the present invention, the carbon dioxide (CO ₂ ) sensor for detecting the carbon dioxide concentration in the subway cabin; A passenger number converting unit converting the number of passengers in the subway cabin by a passenger number conversion equation corresponding to the carbon dioxide concentration detected by the carbon dioxide sensor; A calorific value calculator configured to calculate a total calorific value according to the number of passengers converted by the passenger number conversion formula; And a cabin cooling control unit configured to variably control driving of the cabin air conditioner by comparing a preset reference heat generation amount with the calculated calorific value, wherein the number of passengers in the subway cabin is linearly proportional to the carbon dioxide concentration generated by the passenger's breathing. Characterized in terms of the number of passengers conversion formula.

Here, the number of passengers (N) in terms of expression, a passenger number (N) = CO ₂ concentration (ppm) /8.37 - is given by 95.34, the CO ₂ concentration of 8.37ppm per passenger under the conditions of the lowest CO ₂ concentration is 798ppm It is characterized by increasing.

Here, the total calorific value (QT) in the cabin by the passenger calculated by the calorific value calculation unit is given as the number of passengers (N) x human body calorific value (Q), wherein the human body calorific value (Q) = sensible heat 45 kcal / h + Latent heat 70 kcal / h = 115 kcal / h.

Here, the air-conditioning control unit is characterized in that the variable variable drive the room air conditioner by comparing the total heat generation amount (QT) and the room air conditioning cooling capacity.

On the other hand, as another means for achieving the above-described technical problem, the subway cabin air conditioning control method using the carbon dioxide concentration according to the present invention, a) using a carbon dioxide sensor detecting the carbon dioxide concentration in the subway cabin; b) converting the number of passengers in the subway cabin by a passenger number conversion equation corresponding to the carbon dioxide concentration detected by the carbon dioxide sensor; c) calculating a total calorific value according to the number of passengers converted by the passenger number conversion formula; d) selectively generating a driving control signal for driving a room air conditioner by comparing a preset reference heat amount and the calculated heat amount; And e) variably driving the room air conditioner according to the selected drive control signal.

Here, in the step b), the number of passengers (N) = CO ₂ concentration (ppm) / 8.37-95.34 is obtained by the passenger conversion equation, the minimum CO ₂ concentration of 8.37ppm CO per passenger under the conditions of 798ppm _It is characterized by ₂ concentrations increasing.

Here, the total calorific value (QT) in the cabin of step c) is given as the number of passengers (N) × human body calorific value (Q), the human body calorific value (Q) per person = sensible heat 45 kcal / h + latent heat 70 kcal / h = 115 kcal / h.

Here, the step e) compares the total heat generation amount (QT) and the air conditioner cooling capacity (45,000 kcal / h), if QT ≤ 10,000 kcal / h Cooling Off, 10,000 kcal / h <QT <22,500 If the kcal / h is half cooling (Half Cooling), or 22,500 kcal / h ≤ QT ≤ 45,000 kcal / h characterized in that full cooling (Full Cooling).

According to the present invention, it is possible to maintain a comfortable room temperature by operating the cooling mode based on the number of passengers in consideration of the passenger congestion degree.

According to the present invention, it is possible to save energy by efficiently using the cooling energy through the cooling centered on the passenger congestion degree.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

First, a general subway air conditioner will be described schematically, where the subway is used to mean all of the conventional metropolitan subway, electric cars, railway cars, and the like.

A typical subway air conditioner is a ceiling concentrated distributed electric vehicle air conditioner unit that operates independently on the roof of each passenger car, and two units are installed per vehicle. In this case, a switchboard and two room temperature detectors and two CO ₂ detectors installed on the side of the passenger compartment may be installed in the cabin.

In addition, by the microcomputer air-conditioning selection switch or TCMS control, the air-conditioning unit is a test mode, a full cooling mode, a half cooling mode, an evaporator fan mode, a line Can operate in line flow fan mode, off mode, 1/3 heating mode, 2/3 heating mode, full heating mode, or auto mode have.

For example, the subway air conditioner has 22,500 kcal / h cooling capacity when the outdoor condition is 35 ± 1.5 ℃, the dry condition is 28 ± 1.0 ℃, the wet bulb temperature is 23 ± 1.0 ℃, and the air flow is 3,300 ~ 3450m3 / h. The cooling performance per cabin vehicle can be a total of 45,000 kcal / h.

On the other hand, Figure 2 is a diagram illustrating a room temperature sensor installed in a general subway cabin, Figure 3 is a diagram illustrating a general cabin cooling control unit configured in the form of a control panel.

As shown in FIG. 2, the room temperature sensor 25 installed in the general subway cabin 10 is fixed to the wall of the position between the door and the shelf, and is installed at the same position in the door opposite to the diagonal direction of the cabin 10. have. The average value of these two temperature sensor 25 measurements is taken as the room temperature value.

In addition, Figure 3 illustrates that the cooling control unit located near the passage between the cabin is implemented in the form of the control panel 30, the display unit 31, the outdoor temperature, the indoor temperature, the set temperature is displayed respectively.

Therefore, as shown in Figure 1, when controlling the cooling temperature in the cabin through the temperature sensor 25 located on the wall, it is difficult to properly reflect the comfort of the passenger, according to the embodiment of the present invention the congestion and human body of the passenger Provided is a cooling device control method based on a calorific value, wherein the number of passengers is converted using carbon dioxide (CO ₂ ) concentration generated by breathing.

4 is a block diagram of a subway cabin air conditioning control system using a carbon dioxide concentration according to an embodiment of the present invention.

Referring to FIG. 4, the subway cabin air conditioning control system 100 using carbon dioxide concentration according to an embodiment of the present invention includes a carbon dioxide (CO ₂ ) sensor 110, a cabin temperature sensor 120, and a passenger number conversion unit 130. ), The calorific value calculating unit 140 and the room cooling control unit 150.

The carbon dioxide sensor 110 detects the carbon dioxide concentration in the subway cabin.

The room temperature sensor 120 is fixed to the wall surface of the position between the door and the shelf, and is installed at the same position in the door opposite the room diagonal direction. The average value of the two measured temperature sensors 120 may be the room temperature value.

The passenger number converting unit 130 converts the number of passengers in the subway cabin by the passenger number conversion equation corresponding to the carbon dioxide concentration detected by the carbon dioxide sensor. For example, the number of passengers is converted based on the monitoring of the carbon dioxide concentration by using the correlation analysis result between the cabin carbon dioxide concentration and the number of passengers according to various seasons and routes of the metropolitan subway cabin.

Specifically, the number of passengers in the subway cabin is converted by a passenger number conversion formula which is linearly proportional to the carbon dioxide concentration generated by the passenger's breathing, where the number of passengers N converted by the passenger number conversion unit is converted. The equation is given by the number of passengers (N) = CO ₂ concentration (ppm) /8.37-95.34, with an increase in CO ₂ concentration of 8.37 ppm per passenger, provided that the lowest CO ₂ concentration is 798 ppm.

The calorific value calculating unit 140 calculates the total calorific value according to the number of passengers converted by the passenger number conversion formula. At this time, the total amount of heat generated in the cabin (QT) by the passenger can be given as the number of passengers (N) × human body heating amount (Q), for example, the human body heating value (Q) per person = sensible heat 45 kcal / h + latent heat 70 kcal / h = 115 kcal / h.

The room cooling controller 150 variably controls the driving of the room air conditioner 220 by comparing the preset reference heat amount with the calculated heat amount. That is, the room cooling controller 150 compares the total heat generation amount QT with the cooling capacity of the room air conditioner 220 to variably drive the room air conditioner 220.

The passenger number converting unit 130 and the calorific value calculating unit 140 described above are preferably implemented in a program form, but may be implemented in hardware, software, or a combination of hardware and software. For example, the passenger number converting unit 130 and the calorific value calculating unit 140 described above may be implemented in the cabin cooling control unit 150.

According to an embodiment of the present invention, the passenger congestion is considered by converting the number of passengers corresponding to the carbon dioxide concentration detected from the carbon dioxide sensor 110 installed in the subway cabin, and the air conditioner is operated based on the number of passengers. It is possible to maintain energy-saving through efficient use of cooling energy through cooling with a focus on passenger congestion.

On the other hand, Figure 5 is a diagram showing the correlation between the carbon dioxide concentration and the number of passengers according to an embodiment of the present invention, Figure 6 is a diagram showing a linear proportional proportion of carbon dioxide concentration and the number of passengers according to an embodiment of the present invention.

5 and 6, in order to grasp the correlation between the number of passengers and the cabin CO ₂ concentration, the number conversion equation through monitoring the CO ₂ concentration may be experimentally obtained as in Equation 1 below.

Passengers (N) = CO ₂ concentration (ppm) /8.37-95.34

At this time, the lowest CO ₂ concentration is 798 ppm.

In addition, the human body calorific value Q per person may be sensible heat 45 kcal / h + latent heat 70 kcal / h = 115 kcal / h, the total calorific value of the cabin by the passenger as shown in Equation 2 below.

Total cabin heat generated by passengers (QT) = N × Q

Afterwards, the total air-conditioning capacity of the passengers in the cabin and the air conditioning cooling capacity (45,000 kcal / h) are compared to select air-conditioning, semi-cooling or air conditioning.

For example, if the air conditioning cooling capacity is 45,000 kcal / h, Cooling Off if QT ≤ 10,000 kcal / h, Half Cooling if 10,000 kcal / h <QT <22,500 kcal / h, or Full cooling can be selected if 22,500 kcal / h ≤ QT ≤ 45,000 kcal / h. Of course, it will be apparent to those skilled in the art that the air conditioner can be further divided according to the amount of heat generated without being divided into the cooling operation stop, semi-cooling and pre-cooling.

Specifically, the measurement of the number of passengers in the cabin and the indoor CO ₂ concentration was performed 1259 times in total, and the measurement target line was performed in the Metropolitan Subway Lines 1-8, Bundang Line, Gyeongbu Line, and Gyeongin Line. 5 illustrates the case of subway line 3, wherein the data was analyzed based on the average CO ₂ concentration and the number of passengers between the two stations. For example, the measurement period of the data shown in FIG. 6 is as follows: 2007.03.20 ~ 2007.03.23, 2007.06.26 ~ 2007.06.29, 2008.10.15 ~ 2008.11.27 2009.01.13 ~ 2009.02.05, 2009.04. 20 ~ 2009.04.30.

In addition, as shown in Figure 6, there is a significant linear relationship between the number of passengers and the cabin CO ₂ concentration, the correlation can be expressed as CO ₂ concentration = 798 + 8.37 × N. That is, it was found that the CO ₂ increase effect of about 8.37 ppm per passenger per station.

For example, if the CO ₂ monitoring result is 3000 ppm, the number of passengers is 263, which is converted by the passenger number conversion formula, and the total heat generation amount (QT) is 30,245 kcal / h. The air conditioner in the room is operated in full cooling mode.

On the other hand, when the cabin is crowded, it is effective to operate a cabin line flow fan (not shown) together, for example, when the air conditioner driving signal and the line flow fan are QT> 10,000 kcal / h or more. The drive signal can be transmitted simultaneously.

In addition, the carbon dioxide sensor is typically installed in the room ceiling for monitoring the CO ₂ concentration in the room, at this time, the measured value can take the average value for about 2.5 minutes, the average operating time between subway stations to operate the room air conditioner.

On the other hand, Figure 7 is an operation flowchart of the subway cabin air conditioning control method using a carbon dioxide concentration according to an embodiment of the present invention.

Referring to FIG. 7, in the subway cabin air conditioning control method using the carbon dioxide concentration according to the present invention, first, the carbon dioxide concentration in the subway cabin is detected using a carbon dioxide sensor (S110).

Next, the number of passengers in the subway cabin is converted by the aforementioned passenger number conversion equation corresponding to the carbon dioxide concentration detected by the carbon dioxide sensor (S120). Number of the passenger, as described above, (N) = CO ₂ concentration (ppm) /8.37 - is obtained by a formula in terms of 95.34, increasing the concentration of CO ₂ per passenger 8.37ppm under the condition of the lowest CO ₂ concentration is 798ppm However, it is not limited to this.

Next, the total calorific value is calculated according to the number of passengers converted by the passenger number conversion formula. Here, the total calorific value (QT) in the cabin is given by the number of passengers (N) x human body calorie value (Q), wherein the human body calorific value (Q) per person = sensible heat 45 kcal / h + latent heat 70 kcal / h = 115 kcal / h days Can be, but is not limited to.

Next, the cooling control signal for driving the room air conditioner is selectively generated by comparing the predetermined reference heating value with the calculated heating value (S140).

Next, the air conditioner is variably driven in accordance with the selected cooling drive control signal (S150).

8 is an operation flowchart of a method for controlling the cooling of a subway cabin using carbon dioxide concentration according to a specific embodiment of the present invention.

Referring to FIG. 8, in the subway room air conditioning control method using the carbon dioxide concentration according to the present invention, steps S210 to S240 are the same as steps S110 to S140 shown in FIG. 7, and the selected drive control signal shown in FIG. Accordingly, instead of the variable driving of the room air conditioner (S150), a predetermined cooling switch may be selected and driven (S250). That is, the total calorific value QT and the air conditioner cooling capacity (45,000 kcal / h) are compared, and the total calorific value QT and the air conditioner cooling capacity (45,000 kcal / h) are compared. Perform a Cooling Off step (S260), perform a half cooling step (S270) if 10,000 kcal / h <QT <22,500 kcal / h, or 22,500 kcal / h ≤ QT ≤ 45,000 kcal If / h it is possible to perform a full cooling step (S280).

The foregoing description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a diagram illustrating a subway vehicle in which the indoor ventilation control apparatus according to the related art is implemented.

2 is a diagram illustrating a room temperature sensor installed in a general subway cabin.

3 is a view illustrating that a general cabin cooling control unit is configured in the form of a control panel.

4 is a block diagram of a subway cabin air conditioning control system using a carbon dioxide concentration according to an embodiment of the present invention.

5 is a view showing a correlation between the carbon dioxide concentration and the number of passengers according to an embodiment of the present invention.

6 is a view showing that the carbon dioxide concentration and the number of passengers linearly proportional to each other according to an embodiment of the present invention.

7 is an operation flowchart of a method for controlling the cooling of a subway cabin using carbon dioxide concentration according to an embodiment of the present invention.

8 is an operation flowchart of a method for controlling the cooling of a subway cabin using carbon dioxide concentration according to a specific embodiment of the present invention.

<Brief Description of Drawings>

100: room cooling control system 110: carbon dioxide sensor

120: room temperature sensor 130: passenger number conversion unit

140: calorific value calculation unit 150: room cooling control unit

210: room cooling drive unit 220: room air conditioning

Claims (8)

In the system for controlling the cooling of the subway cabin, A carbon dioxide (CO ₂ ) sensor for detecting carbon dioxide concentration in the subway cabin; A passenger number converting unit converting the number of passengers in the subway cabin by a passenger number conversion equation corresponding to the carbon dioxide concentration detected by the carbon dioxide sensor; A calorific value calculator configured to calculate a total calorific value according to the number of passengers converted by the passenger number conversion formula; And A room cooling controller configured to variably control driving of a room air conditioner by comparing a preset reference heat amount and the calculated heat amount. Including, Passenger number in the subway cabin is a subway cabin air conditioning control system using a carbon dioxide concentration, characterized in that converted by the passenger number conversion equation linearly proportional to the carbon dioxide concentration caused by the breathing of the passenger. The method of claim 1, The passenger number (N) conversion formula, passenger number (N) = CO ₂ concentration (ppm) / 8.37-95.34 Is given, the lowest CO ₂ concentration is underground room cooling control system under the conditions of 798ppm carbon dioxide concentration, characterized in that to increase the CO ₂ concentration of the passengers per 8.37ppm to. The method of claim 1, The total calorific value (QT) in the cabin by the passenger calculated by the calorific value calculation unit is given as the number of passengers (N) x human body calorific value (Q), wherein the human body calorific value (Q) = sensible heat 45 kcal / h + latent heat Subway cabin air conditioning control system using a carbon dioxide concentration, characterized in that 70kcal / h = 115kcal / h. The method of claim 1, The room cooling control unit compares the total heat generation amount (QT) and the room air conditioner cooling capacity by varying driving the room air conditioner, characterized in that the subway room air conditioning control system using a carbon dioxide concentration. In the method of controlling the cooling of the subway cabin, a) detecting carbon dioxide concentration in the subway cabin using a carbon dioxide sensor; b) converting the number of passengers in the subway cabin by a passenger number conversion equation corresponding to the carbon dioxide concentration detected by the carbon dioxide sensor; c) calculating a total calorific value according to the number of passengers converted by the passenger number conversion formula; d) selectively generating a driving control signal for driving a room air conditioner by comparing a preset reference heat amount and the calculated heat amount; And e) variably driving a room air conditioner according to the selected drive control signal; Subway room cooling control method using a carbon dioxide concentration comprising a. The method of claim 5, Wherein in step b), passenger (N) = CO ₂ concentration (ppm) /8.37 - passengers of 95.34 is obtained from the conversion equation, the lowest CO ₂ concentration is the concentration of CO ₂ per passenger 8.37ppm under the condition of 798ppm Subway room cooling control method using a carbon dioxide concentration, characterized in that the increase. The method of claim 5, The total calorific value (QT) in the cabin of step c) is given as the number of passengers (N) x human body calorific value (Q), but the human body calorific value (Q) per person = sensible heat 45 kcal / h + latent heat 70 kcal / h = 115 kcal Subway room cooling control method using the carbon dioxide concentration, characterized in that / h. The method of claim 5, The step e) compares the total calorific value (QT) with the air conditioner cooling capacity (45,000 kcal / h), when QT ≤ 10,000 kcal / h, cooling off, 10,000 kcal / h <QT <22,500 kcal / If h, half cooling (Half Cooling), or 22,500 kcal / h ≤ QT ≤ 45,000 kcal / h, Full cooling (cooling) subway room cabin control method using the carbon dioxide concentration, characterized in that.

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