WO2009096350A1

WO2009096350A1 - Air conditioning control system

Info

Publication number: WO2009096350A1
Application number: PCT/JP2009/051164
Authority: WO
Inventors: Kenzo Yonezawa; Yasuo Takagi; Nobutaka Nishimura; Yuuichi Hanada; Naoki Makino; Hiroshi Morimoto
Original assignee: Kabushiki Kaisha Toshiba
Priority date: 2008-01-28
Filing date: 2009-01-26
Publication date: 2009-08-06
Also published as: CN103292431B; TWI439644B; KR101198313B1; US20160195290A1; CN101925786B; TWI463101B; KR20100106508A; CN103292431A; DE112009000227T5; CN101925786A; JP2009174825A; TW200949165A; TW201337181A; US20100307731A1; JP5132334B2

Abstract

An air conditioning control system (1) includes: an air conditioner (10) having a external air cooling coil (11) for cooling an external air and a returning air cooling coil (12) for cooling an air returning from a room; a central heat source device (40) for supplying a cold water to the coils (11, 12) of the air conditioner (10); and an air conditioning linkage control device (50) which calculates a set value of the air conditioner (10) so as to minimize the total energy consumed in the air conditioning control system (1) within a preset range of the pleasance index.

Description

Air conditioning control system

The present invention relates to an air conditioning control system that controls air conditioning in an office, a residence, or the like.

About half of the energy consumed by all building equipment such as offices and residences is air-conditioning related energy. Therefore, the promotion of energy saving related to air conditioning control greatly contributes to energy saving of the entire building equipment.

In view of this, Patent Document 1 discloses a technique using an air-conditioning system that performs air-conditioning operation that achieves optimum energy saving in a building facility.

The technique of this patent document 1 includes the energy consumption of the heat source machine that produces cold / hot water, the energy consumption of the fan that sends out the air heat-exchanged by the air conditioning coil, and the energy consumption of the pump that sends the cold / hot water from the heat source machine By obtaining the coil temperature target value of the air conditioning coil and the cold / hot water temperature target value of the heat source machine so that the required energy consumption for air conditioning is minimized, it is possible to efficiently perform the energy saving air conditioning operation.
JP 2004-69134 A

While energy conservation is promoted in this way, it is required to ensure so-called comfort in a room subject to air conditioning control in order to satisfy the thermal sensation of the occupants. However, there is a trade-off between this “promotion of energy saving” and “ensuring the comfort of occupants”. That is, when energy conservation is promoted, the comfort of the occupants often decreases.

However, it is possible to suppress wasteful energy consumption by suppressing excessive energy consumption that exceeds the comfort range of the occupants.

Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioning control system capable of efficiently saving energy consumption while considering the comfort of the occupants.

In order to achieve the above object, an air conditioning control system according to a first aspect of the present invention includes an air conditioner, a central heat source device, an air conditioning control device that controls operations of the air conditioner and the central heat source device, and an air conditioning control. A measuring device that is installed corresponding to each target room or each indoor control zone and measures the temperature and humidity of the air conditioning control target is connected. The measurement device includes a measurement value transmission unit that acquires a temperature measurement value and a humidity measurement value measured in a room or an indoor control zone of the air conditioning control target, and transmits the temperature measurement value and the humidity measurement value to the air conditioning control device. The air conditioner takes in a predetermined amount of outside air and adjusts the temperature and humidity of the outside air taken in based on the temperature setting value and the humidity setting value acquired from the air conditioning control device, and the room of the air conditioning control target Alternatively, a predetermined amount of return air is taken in from the indoor control zone and the return air coil that adjusts the temperature of the return air taken in based on the temperature set value acquired from the air conditioning control device, and the outside air cooling coil Blower that generates air in which the outside air whose humidity has been adjusted and the return air whose temperature has been adjusted by the return air cooling coil is mixed, and blows the air mixed in the air-conditioning control target room or a control zone in the room And a fan. The central heat source device includes a refrigerator and a cooling tower, adjusts the water temperature based on a water temperature setting value acquired from the air conditioning control device, and generates cold water or hot water to be supplied to the air conditioner, and the air conditioning control A water supply pump for supplying cold water or hot water generated by the cold / hot water adjustment unit to at least one of the outside air coil and the return air coil of the air conditioner based on a flow rate value acquired from an apparatus; . The air conditioning control device stores a measurement value acquisition unit that acquires the temperature measurement value and the humidity measurement value transmitted from the measurement value transmission unit of the measurement device, and a preset target setting range of the comfort index. In the target setting range of the comfort index stored in the comfort index range storage unit based on the temperature measurement value and the humidity measurement value acquired by the comfort index range storage unit and the measurement value acquisition unit, the refrigeration Temperature setting value of air blown from the air conditioner so that the total value of energy consumption of the cooling unit, the cooling tower, the outside air coil, the return air coil, the water supply pump, and the blower fan is minimized An air conditioner set value calculating unit that calculates a humidity set value, a set value transmitting unit that transmits the temperature set value and humidity set value calculated by the air conditioner set value calculating unit to the air conditioner, and the air conditioner set value Temperature calculated by the calculator And calculates the water temperature set value and the flow rate value of the cold or hot water from the set value and the humidity set value, and a control value transmission unit that transmits to the central heat source device.

An air conditioning control system according to a second aspect of the present invention includes an air conditioner, a water pump, an air conditioning control device that controls operations of the air conditioner and the water pump, and a room or a room that is an air conditioning control target. A measurement device that is installed corresponding to each control zone and measures the temperature and humidity of the air conditioning control target is connected. The measurement apparatus includes a measurement value transmission unit that acquires a temperature measurement value and a humidity measurement value measured in the indoor or air-conditioning control target room or a control zone in the room, and transmits the measurement value to the air-conditioning control apparatus. The air conditioner takes in a predetermined amount of outside air, adjusts the temperature and humidity of the outside air taken in based on the temperature setting value and the humidity setting value acquired from the air conditioning control device, and the indoor or air conditioning control target room or A return air coil that takes in a predetermined amount of return air from an indoor control zone and adjusts the temperature of the return air that has been acquired based on the temperature setting value acquired from the air conditioning control device, and the temperature and humidity are adjusted by the outside air cooling coil. A blower fan that generates air in which the adjusted outside air and the return air whose temperature is adjusted by the return air cooling coil are mixed, and blows the air mixed in the air-conditioning control target room or a control zone in the room; . The water supply pump supplies cold water or hot water supplied from the outside to at least one of the outside air coil and the return air coil of the air conditioner based on the flow rate value acquired from the air conditioning controller. A water supply section is provided. The air conditioning control device stores a measurement value acquisition unit that acquires the temperature measurement value and the humidity measurement value transmitted from the measurement value transmission unit of the measurement device, and a preset target setting range of the comfort index. Within the target setting range of the comfort index stored in the comfort index range storage unit based on the temperature measurement value and the humidity measurement value acquired by the comfort index range storage unit and the measurement value acquisition unit, the outside air The temperature setting value and humidity setting value of the blast supplied from the air conditioner are calculated so that the total value of the energy consumption of each of the air coil, the return air coil, the water pump, and the blower fan is minimized. An air conditioner set value calculator, a set value transmitter that transmits the temperature set value and humidity set value calculated by the air conditioner set value calculator, and the air conditioner set value calculator Temperature setpoint and It calculates the flow rate value of the cold or hot water from degrees set value, and a control value transmission unit that transmits to the water pump.

According to the air conditioning control system of the present invention, energy consumption can be efficiently saved while taking into account the comfort of the occupants.

1 is an overall view showing a configuration of an air conditioning control system according to first to fifth embodiments of the present invention. FIG. 3 is a configuration diagram showing a detailed configuration of an air conditioning control system according to the first to third embodiments of the present invention. FIG. 10 is a sequence diagram showing an operation of the air conditioning control system according to the first to fifth embodiments of the present invention. 6 is a graph showing the relationship between room temperature and indoor humidity when the PMV value used in the air conditioning control system according to the first to fifth embodiments of the present invention is determined to be comfortable. In the air-conditioning control system by 3rd Embodiment of this invention, it is a graph which shows the change by the outside air intake amount of the damper opening for supplying the air to the coil 11 for external air cooling, the coil 12 for return air cooling, and the ventilation fan 13 . It is a block diagram which shows the detailed structure of the air-conditioning control system by 4th Embodiment of this invention. It is a block diagram which shows the detailed structure of the air conditioner of the air-conditioning control system by 5th Embodiment of this invention. It is a conceptual diagram which shows the flow path of the cold water which flows through the coil for external air cooling of the air conditioner by 5th Embodiment of this invention, and the coil for return air cooling.

Embodiments of an air conditioning control system of the present invention will be described with reference to the drawings. In recent years, many office buildings have good heat insulation, and since there are many PCs and OA devices, they are often in a cooling mode throughout the year. Therefore, in each of the following embodiments, a case where air conditioning control is mainly performed in the cooling mode will be described.

<< First Embodiment >>
<Configuration of air conditioning control system according to the first embodiment>
FIG. 1 shows an overall view of an air conditioning control system 1 according to the first embodiment of the present invention.

In the case of a large building, since the room is large, the room is divided into a plurality of control zones, and a plurality of air conditioners are installed in a machine room near the room corresponding to each control zone. Even in such a case, hereinafter, each control zone is also referred to as a room for simplicity.

The air conditioning control system 1 is for controlling the air conditioning in the building A to be air-conditioned. The air conditioning control system 1 includes an air conditioner 10 installed in each room in the building A, a temperature sensor 20 installed in each room in order to measure a room temperature and transmit a measured value to each air conditioner 10, In order to measure the humidity in the room and transmit the measured value to each air conditioner, a humidity sensor 30 installed in each room, a central heat source device 40 that manages the cold water supplied to each air conditioner 10, and each air conditioner 10 And an air conditioning linkage control device 50 as an air conditioning control device that receives the room temperature measurement value and the indoor humidity measurement value received in step S1 and controls the operation of the air conditioner 10.

Each air conditioner 10 acquires measurement values from the temperature sensor 20 and the humidity sensor 30 and transmits the measurement values to the air conditioning cooperation control device 50. Further, as shown in FIG. 2, each air conditioner 10 includes an outside air cooling coil 11 that dehumidifies and cools outside air using cold water supplied from the central heat source device 40, and cold water supplied from the central heat source device 40. The return air cooling coil 12 cools the sensible heat emitted from the indoor return air lighting, OA equipment, human body, etc., and the outside air cooled by the outside air cooling coil 11 and the return air cooling coil 12. And a blower fan 13 that blows air mixed with the return air cooled in step 4 into each room.

The central heat source device 40 includes a refrigerator 41 that generates cold water, a cooling tower 42 that cools the refrigerator 41 with air in order to reuse the water whose temperature has risen and the refrigerator 41, the refrigerator 41, and each air conditioner 10. Or the water supply pump 43 which conveys cold water between the cooling towers 42 is provided.

The air conditioning cooperation control device 50 acquires the measured values of the temperature sensor 20 and the humidity sensor 30 transmitted from each air conditioner 10. And the air-conditioning cooperation control device 50 is within the range of the comfort index set in advance, the cooling tower 42 of the central heat source device 40, the refrigerator 41, the water pump 43, the outside air cooling coil 11 of the air conditioner 10, the return The optimum room temperature setting value and humidity setting value for each room are calculated so that the total energy consumption of the air cooling coil 12 and the blower fan 13 is minimized. Further, the air conditioning cooperation control device 50 transmits the calculation result to each air conditioner 10 and the central heat source device 40.

<Operation of the air conditioning control system according to the first embodiment>
Operation | movement of the air-conditioning control system 1 in 1st Embodiment is demonstrated with reference to the sequence diagram of FIG.

First, air conditioning control in building A is started. Then, each temperature sensor 20 measures the temperature in each room, and each humidity sensor 30 measures the humidity in each room. And the measured value of the temperature and humidity of each room | chamber is transmitted to the air conditioner 10 with which each room was equipped (S1).

These measurement values are received by each air conditioner 10 and then transmitted from the air conditioner 10 to the air conditioning linkage control device 50 (S2).

The air-conditioning linkage control device 50 is based on the received measurement values, the PMV (Predicted Mean Vote) within a comfortable range, and the cooling tower 42 of the central heat source device 40, which is the total required energy consumption, the refrigerator 41, the water supply pump 43, and the optimum room temperature setting value in each room so that the total value of energy consumption in the outside air cooling coil 11, the return air cooling coil 12, and the blower fan 13 of the air conditioner 10 is minimized. A humidity set value is calculated (S3).

Here, PMV used for calculation of each value will be described.

PMV is a variable that affects human sense of heat against heat and cold. (A) Air temperature, (b) Relative humidity, (c) Average radiation temperature, (d) Airflow velocity, (e) Activity amount It is a comfort index obtained from six variables of (the amount of internal heat generated by the human body) and (f) the amount of clothes.

The amount of heat generated by a person is represented by the sum of the amount of radiation by convection, the amount of heat released by radiation, the amount of heat evaporated from the person, the amount of heat released by heat and the amount of heat stored. When the calorific value is in a thermal equilibrium state, the human body becomes thermally neutral. Therefore, the room is in a comfortable state that is neither hot nor cold for the human body. Conversely, when the calorific value is out of thermal equilibrium, the human body feels hot or cold.

Professor Fanger of the Technical University of Denmark announced the derivation of the comfort equation in 1967. Then, using this as a starting point, statistical analysis was conducted from questionnaires of a large number of subjects, and the thermal load of the human body and the thermal sensation of human beings were combined to propose PMV. This PMV was taken up by the ISO standard in 1994 and has recently been used frequently.

PMV, which is an index of thermal sensation, is a numerical value based on a 7-point scale,
+3: Hot,
+2: Warm,
+1: Somewhat warm,
0: Neither, comfortable,
-1: Somewhat cool,
-2: Cool,
-3: cold,
It is expressed as The range of human comfortable PMV values is -0.5 to +0.5.

Of the above six variables, the unit of met is used for the amount of activity representing work intensity, and the unit of clo is used for the amount of clothing.

The unit met represents the amount of metabolism and is a value based on resting metabolism in a thermally comfortable state. Here, 1met is represented by the following formula (1).

[Equation 1]
1 met = 58.2 W / m ² = 50 kcal / m ² · h (1)
In addition, the unit clo represents the thermal insulation of clothes. 1 clo is a room temperature of 21 ° C, relative humidity 50%, air flow of 5 cm / s or less, and the amount of heat released from the body surface is balanced with 1 met metabolism. It is a value in the clothing state which does. When this is converted into a normal thermal resistance value, it is represented by the following formula (2).

[Equation 2]
1 clo = 0.155 m ² · ° C / W = 0.180 m ² · h · ° C / kcal (2)
Next, a formula for calculating the PMV value is shown in the following formula (3).

Here, M: activity amount [kcal / h], A: human body surface area [m ² ], L: human body heat load [kcal / m ² h] (calculated from Fanger's comfort equation). Using this equation (3), within a comfortable range (-0.5 <PMV <+0.5), the PMV value on the hotter side during cooling and the PMV value on the colder side during heating Each PMV target value is set. This reduces the air conditioning load and achieves energy saving.

Next, calculation of the optimum set value for the air conditioner 10 will be described.

As described above, the total energy consumed in the air conditioning control system 1 is the cooling tower 42 of the central heat source device 40, the refrigerator 41, the water pump 43, the outside air cooling coil 11 of the air conditioner 10, and the return air cooling. It is the total value of the energy consumption of each of the coil 12 and the blower fan 13.

And there exists a technique as described in Unexamined-Japanese-Patent No. 2008-232507 as an algorithm which calculates the setting value of the air conditioning machine 10 so that the total consumption energy consumed in the air-conditioning control system 1 may become the minimum. This method uses the measured values of various sensors used for air conditioning control to determine the state quantities necessary for air conditioning optimization, for example, the amount of heat generated in the room, the amount of steam generated in the room, the overall heat transfer coefficient of the heat exchanger, and the heat transfer area. Estimate physical quantities such as products. This enables optimal control with a view to the entire air conditioning system. As another algorithm, there is a technique as described in Japanese Patent Application Laid-Open No. 2008-256258. In this method, a provisional total air conditioning load is calculated from the heat exchange amount between the current heat source device and the cold water coil in the initial stage. Then, with this total air conditioning load as a variable, the air conditioning equipment of the air conditioning system is controlled based on the optimum operating state quantity of the air conditioning system. Then, when the air condition of the air conditioning control target space substantially matches the set air conditioning condition, the true total air conditioning load is calculated, and the optimum operation state quantity is determined. As a result, the air conditioning is efficiently operated, and energy saving of the air conditioning system is realized.

In the first embodiment, as described above, the air conditioner 10 has a minimum PMV value within the comfortable range of −0.5 to +0.5 so that the total energy consumption in the air conditioning control system 1 is minimized. Is calculated, and the set value is transmitted to the air conditioner 10 and the central heat source device 40 (S3).

Then, when the optimum set value of the air conditioner 10 is acquired by the central heat source device 40, necessary cold water is supplied to the air conditioner 10 based on this set value (S4). As a result, the air adjusted in consideration of the comfort of the occupant is supplied to the air-conditioned room (S5).

Here, the operation of the air conditioner 10 when the adjusted air is supplied into the air-conditioning controlled room will be described.

When the cooling process is performed by the air conditioning control system, the function of dehumidifying and cooling fresh outside air taken into the building for the residents (latent heat cooling load) and the sensible heat generation of the lighting inside the building, OA equipment, human body, etc. Two functions of cooling (sensible heat cooling load) are performed in the air conditioner.

When performing cooling with a conventional air conditioner, the above two functions were performed simultaneously by mixing outside air and return air. However, in this case, only the outside air needs to be dehumidified. For this reason, the required temperature and flow rate of cold water are different for each function. Therefore, it is more efficient to perform the above two functions separately.

Therefore, as shown in FIG. 2, in the first embodiment, an outside air cooling coil 11 that dehumidifies and cools the outside air and a return air cooling coil 12 that cools the return air are provided separately. And the cold water of the temperature and flow volume suitable for each control is supplied.

According to the first embodiment described above, the comfort of the occupant is taken into account, the outside air and the indoor return air are adjusted separately, and the total required energy consumption in the system is controlled to be minimum. The Therefore, it is possible to efficiently perform air conditioning control that saves energy.

<< Second Embodiment >>
<Configuration of air conditioning control system according to the second embodiment>
The configuration of the air conditioning control system 2 according to the second embodiment of the present invention is the same as the configuration of the first embodiment shown in FIGS. 1 and 2. Therefore, detailed description of the configuration of the second embodiment is omitted.

<Operation of the air conditioning control system according to the second embodiment>
The operation of the air conditioning control system 2 in the second embodiment is the same as that of the first embodiment except for the calculation of the set value of each air conditioner 10 in step S3 of FIG. Therefore, detailed description of the same parts as those of the first embodiment is omitted.

In the second embodiment, in step S3 of FIG. 3, the processing when the air conditioning linkage control device 50 calculates the set value of each air conditioner 10 so that the required energy consumption is minimized within the range where the PMV is comfortable. explain.

Fig. 4 shows the relationship between room temperature and room humidity at which the PMV value is 0.3 to 0.5, which is energy-saving and comfortable during cooling, assuming an office building with an indoor wind speed of 0.1 m / s. Indicates. FIG. 4 shows that the PMV value is 0.3 to 0.5 when the room temperature and the room humidity are in a range A surrounded by a thick line (the humidity is limited to 20% to 80%). ).

On the other hand, in order to reduce greenhouse gases, the government recommends that the temperature setting of air conditioners in summer be 28 ° C.

However, in this case, as can be seen from FIG. 4, when the room temperature is 28 ° C., the PMV value becomes larger than +0.5 which is the upper limit of the comfortable range for humans, no matter how low the humidity is.

However, if the indoor wind speed is 0.5 m / s, the humidity is 40% and the PMV is +0.5 or less (about 0.43) even if the room temperature is 28 ° C.

Therefore, in the second embodiment, the wind with fluctuations from the air blowing portion of the air conditioner 10 so that the maximum wind speed is 0.5 m / s around 1 m from the floor which is the center position of the height where the human is. It is set so that it is supplied to the room subject to air conditioning control.

Since this supplied wind is a fluctuating wind, the average wind speed can be set to be smaller than 0.5 m / s. For this reason, even if the room temperature setting is 28 ° C., comfortable air conditioning control can be provided to the occupants without significantly increasing the energy consumption of the blower fan 13.

According to the second embodiment described above, the optimum setting value of the air conditioner 10 is calculated in consideration of the wind speed blown from the air conditioner 10. For this reason, it becomes possible to perform the air-conditioning control aiming at energy saving of energy consumption and maintenance of comfort more efficiently.

<< Third Embodiment >>
<Configuration of air conditioning control system according to the third embodiment>
In the configuration of the air conditioning control system 3 according to the third embodiment of the present invention, at least one of a carbon dioxide sensor (not shown) and a human sensor (not shown) is provided in a room subject to air conditioning control. Other configurations are the same as those of the first embodiment shown in FIGS. 1 and 2. Therefore, detailed description of the same parts as those of the first embodiment is omitted.

The carbon dioxide sensor measures the carbon dioxide concentration in the room exhausted from the occupants and transmits it to the air conditioner 10. The human sensor detects the number of occupants in the room subject to air conditioning control and transmits the detected number to the air conditioner 10.

<Operation of the air conditioning control system according to the third embodiment>
The operation of the air conditioning control system 3 in the third embodiment will be described with reference to FIG.

First, air conditioning control in building A is started. Then, each temperature sensor 20 measures the indoor temperature, and each humidity sensor 30 measures the indoor humidity. At the same time, the carbon dioxide sensor measures the carbon dioxide concentration in the room, or the human sensor detects the number of people in the room. The measured value measured by each sensor is transmitted to the air conditioner 10 in each room (S1).

Each air conditioner 10 receives the measurement value transmitted from each sensor and further transmits it to the air conditioning cooperation control device 50 (S2).

In the third embodiment, a process when the air conditioning linkage control device 50 calculates the optimum setting value of each air conditioner 10 so that the required energy consumption is minimized within the range where the PMV is comfortable will be described.

In the air conditioning linkage control device 50 of the third embodiment, the damper opening for supplying air to the outside air cooling coil 11, the return air cooling coil 12, and the blower fan 13 is controlled according to the graph shown in FIG.

As shown in FIG. 5, at the time of air conditioning startup (a), the tamper to the return air cooling coil 12 is fully open and the damper to the outside air cooling coil 11 is fully closed. Therefore, the indoor air is not exhausted to the outside air. Then, exhausting into the room is started after a certain time. Then, the minimum outside air (b) to the middle outside air (c) to the maximum outside air (d) so that the total energy consumption of each device is minimized by the temperature and humidity of the outside air and the temperature and humidity of the return air. Any one of the time points is selected, and each tamper opening degree is controlled.

When any point in time from the minimum outside air (b) to the middle outside air (c) to the maximum outside air (d) is selected, the room has a cooling request, and the enthalpy of the outside air is lower than the enthalpy in the room. When it is more effective to take outside air in terms of energy, the damper opening degree is controlled so that outside air is actively introduced. For this reason, the amount of cold water supplied to the return air cooling coil 12 is reduced.

Further, here, when the load of the outside air cooling coil 11 is larger than a certain value, each damper opening is controlled according to FIG. At this time, the set value of each device is calculated in consideration of the measurement value acquired from the carbon dioxide sensor or the human sensor.

Specifically, when the carbon dioxide concentration is higher than a certain level, or when the number of people in the room exceeds a certain level, a minimum amount of outside air is taken in to reduce the carbon dioxide concentration below the certain level. Thus, the damper opening is controlled and the carbon dioxide concentration is lowered by ventilation. In this way, ventilation is performed without the load of the outside air cooling coil 11 being excessive.

Thus, when determining the set value of each air conditioner 10 so that the required energy consumption of each device is minimized, the minimum based on the use of outside air cooling and the carbon dioxide concentration in the room or the number of people in the room (S3). And based on this setting value, the central heat source apparatus 40 supplies the cold water which is required to the air conditioner 10 (S4). As a result, the air adjusted in consideration of the comfort of the occupant is supplied to the air-conditioned room (S5).

According to the third embodiment described above, the optimum setting value of the air conditioner is calculated in consideration of the use of outside air cooling and the intake of outside air based on the indoor carbon dioxide concentration or the number of people in the room. Therefore, it becomes possible to perform the air conditioning control in which energy consumption is further efficiently saved.

<< 4th Embodiment >>
<Configuration of the air conditioning control system according to the fourth embodiment>
In the configuration of the air conditioning control system 4 according to the fourth embodiment of the present invention, as shown in FIG. 6, two systems of heat source devices, a central heat source device 40 and a second central heat source device 40 ′, are installed. Other configurations are the same as those of the first embodiment. Therefore, detailed description of the same parts as those of the first embodiment is omitted.

In the fourth embodiment, the central heat source device 40 supplies cold water to the outside air cooling coil 11, and the second central heat source device 40 ′ supplies cold water to the return air cooling coil 12.

<Operation of the air conditioning control system according to the fourth embodiment>
The operation of the air conditioning control system 4 in the fourth embodiment is the same as that in the first embodiment except for the processing when supplying cold water in step S5 of FIG. Therefore, detailed description of the same parts as those of the first embodiment is omitted.

In 4th Embodiment, when supplying cold water to each air conditioner 10 in step S6, the central heat source device 40 supplies cold water to the outside air cooling coil 11, and the second heat source device 40 is a separate system from the central heat source device 40. The central heat source device 40 ′ supplies cold water to the return air cooling coil 12.

In the conventional air conditioning control system, the cold water supplied to the cooling coil by the central heat source device is about 7 ° C. However, this 7 ° C. cold water is required only when the outside air is dehumidified and cooled. On the other hand, when cooling the return air in the air conditioning control target room, a temperature of about 13 ° C. is sufficient for the temperature of the cold water. The amount of energy required to dehumidify and cool the outside air (latent heat cooling load) is about 30 to 20% of the total amount of energy required for air conditioning control of cooling. Therefore, the amount of energy (sensible heat cooling load) required when cooling the return air corresponding to 70 to 80% of the total amount of energy is used to excessively cool the cold water. Therefore, useless energy is generated.

Therefore, in the fourth embodiment, two systems of cold water supply, that is, a central heat source device 40 that supplies cold water to the outside air cooling coil 11 and a second central heat source device 40 ′ that supplies cold water to the return air cooling coil 12. A source is provided. And the cold water which the central heat source apparatus 40 supplies to the coil 11 for external air cooling is adjusted to about 7 degreeC. In contrast, the cold water supplied to the return air cooling coil 12 by the second central heat source device 40 ′ is set to be adjusted to around 13 ° C.

According to the above fourth embodiment, two central heat source devices 40 and 40 'are provided. As a result, energy waste due to excessive adjustment of cold water to a low temperature can be eliminated. Therefore, it becomes possible to perform the air conditioning control in which energy consumption is further efficiently saved.

<< 5th Embodiment >>
<Configuration of air conditioning control system according to fifth embodiment>
The configuration of the air conditioning control system 5 according to the fifth embodiment of the present invention is the same as the configuration of the air conditioning control system 1 according to the first embodiment shown in FIG. However, the outside air cooling coil 11 is connected in series with the return air cooling coil 12 in each air conditioner 10.

Each air conditioner 10 includes a plurality of valves as shown in FIG. The first valve 14 adjusts the amount of cold water taken into the outside air cooling coil 11 from the central heat source device 40 according to the opening degree. The second valve 15 adjusts the amount of cold water taken into the return air cooling coil 12 after being used in the outside air cooling coil 11. The third valve 16 is connected in parallel with the return air cooling coil 12 and adjusts the amount of cold water drained directly after being used in the outside air cooling coil 11. The fourth valve 17 is connected to the outside air cooling coil 11 in parallel, and the valve 15 and the valve 16 are connected to be upstream of these in series and from the central heat source device 40 to the return air cooling coil 12. Adjust the amount of cold water taken directly into the.

<Operation of the air conditioning control system according to the fifth embodiment>
The operation of the air conditioning control system 5 in the fifth embodiment is the same as that in the first embodiment except for the processing when cold water is supplied in step S5 of FIG. Therefore, detailed description of the same parts as those of the first embodiment is omitted.

In the fifth embodiment, when supplying cold water to each air conditioner 10 in step S5, first, cold water of 7 ° C. is supplied from the central heat source device 40 to the outside air cooling coil 11. Then, the cold water after being used in the outside air cooling coil 11 is reused in the return air cooling coil 12. As described in the fourth embodiment, the cold water used in the return air cooling coil 12 does not have to be as low as the cold water used in the outside air cooling coil 11. Accordingly, the cold water used in the return air cooling coil 12 can be dealt with by reusing the cold water after being used in the outside air cooling coil 11.

At this time, the amount of cold water supplied from the central heat source device 40 to the outside air cooling coil 11 is adjusted by the opening degree of the valve 14. The amount of cold water that is used by the outside air cooling coil 11 and then supplied to the return air cooling coil 12 is adjusted by the opening degree of the valve 15 and the valve 16. Further, when the amount of cold water used in the return air cooling coil 12 is not sufficient after the use of the outside air cooling coil 11, the cold water is returned from the central heat source device 40 by opening the valve 17. Directly supplied to the cooling coil 12.

FIG. 8A shows the flow of cold water when the valve 14 and the valve 15 are opened to the same extent so that all the cold water used in the outside air cooling coil 11 is supplied to the return air cooling coil 12. It shows with. FIG. 8B shows that the valve 14, the valve 15, and the valve 16 are opened, so that a part of the cold water used in the outside air cooling coil 11 is supplied to the return air cooling coil 12 and is unnecessary. The flow of cold water when the cold water is drained without passing through the return air cooling coil 12 is indicated by a bold line. In FIG. 8C, when the valve 14, the valve 15, and the valve 17 are opened, the cold water used in the outside air cooling coil 11 and the cold water from the central heat source device 40 are supplied to the return air cooling coil 12. The flow of cold water in the case of

According to the above fifth embodiment, the outside air cooling coil 11 is connected in series with the return air cooling coil 12. With such a configuration, the cold water used in the outside air cooling coil 11 can be reused in the return air cooling coil 12. Therefore, it becomes possible to perform the air conditioning control in which energy consumption is further efficiently saved.

In the first to fifth embodiments, the case where the central heat source device 40 is provided in the building A subject to air conditioning control has been described. However, the refrigerator 41 and the cooling tower 42 of the central heat source device 40 are not in each building, and when performing air-conditioning control by DHC (District Heating and Cooling), cold / hot water may be supplied from the outside. (However, there is a water pump 43 that sends cold and hot water to each air conditioner). In such a case, the total consumed energy in the air conditioning control system is the total value of the consumed energy of the water pump, the outside air cooling coil, the return air cooling coil, and the blower fan.

In the first to fifth embodiments, the case where each measured value measured by each sensor is transmitted from each sensor to the air conditioning linkage control device 50 via the air conditioner 30 has been described. However, the present invention is not limited to this, and each measurement value may be directly transmitted from each sensor to the air conditioning cooperation control device 50.

In the first to fifth embodiments, the PMV value is used as a comfort index for human thermal sensation. However, the present invention is not limited to this, and air conditioning control may be performed using a standard effective temperature, a new effective temperature, or the like.

Further, the embodiments may be combined as much as possible. A higher effect can be obtained by combining the implementation states.

With the air conditioning control system of the present invention, in a large building or the like, while considering the comfort of the occupants, excessive energy consumption exceeding the occupant's comfort range is suppressed, and energy consumption is efficiently saved. Can be planned.

Claims

An air conditioner, a central heat source device, an air conditioning control device that controls the operation of the air conditioner and the central heat source device, and an air conditioning control target that is installed corresponding to each room or indoor control zone. In an air conditioning control system connected to a measuring device that measures temperature and humidity,
The measuring device is
A measurement value transmission unit that acquires the temperature measurement value and the humidity measurement value measured in the indoor or indoor control zone of the air conditioning control target, and transmits to the air conditioning control device,
The air conditioner
A coil for outside air that takes in a predetermined amount of outside air and adjusts the temperature and humidity of the outside air taken in based on the temperature setting value and the humidity setting value acquired from the air conditioning control device,
A return air coil that takes in a predetermined amount of return air from the air conditioning control target room or indoor control zone, and adjusts the temperature of the returned return air based on a temperature setting value acquired from the air conditioning control device;
Generates air in which the outside air whose temperature and humidity are adjusted by the outside air cooling coil and the return air whose temperature is adjusted by the return air cooling coil are mixed, and the room to be air-conditioned is controlled or a control zone in the room A blower fan for blowing the air mixed in
With
The central heat source device is
A chiller / cooling tower comprising a refrigerator and a cooling tower, adjusting the water temperature based on a water temperature setting value acquired from the air conditioning controller, and generating cold water or hot water to be supplied to the air conditioner;
Water supply for supplying cold water or hot water generated by the cold / hot water adjustment unit to at least one of the outside air coil and the return air coil of the air conditioner based on the flow rate value acquired from the air conditioning controller A pump,
With
The air conditioning control device
A measurement value acquisition unit that acquires the temperature measurement value and the humidity measurement value transmitted from the measurement value transmission unit of the measurement device;
A comfort index range storage unit that stores a target setting range of a comfort index set in advance;
Based on the temperature measurement value and the humidity measurement value acquired by the measurement value acquisition unit, in the target setting range of the comfort index stored in the comfort index range storage unit, the refrigerator, the cooling tower, the The temperature setting value and humidity setting value of the air blown from the air conditioner are calculated so that the total value of the energy consumption of the outside air coil, the return air coil, the water pump, and the blower fan is minimized. An air conditioner set value calculator,
A set value transmitting unit for transmitting the temperature set value and the humidity set value calculated by the air conditioner set value calculating unit to the air conditioner;
From the temperature setting value and the humidity setting value calculated by the air conditioner setting value calculation unit, a control value transmission unit that calculates a water temperature setting value and a flow rate value of the cold water or hot water, and transmits it to the central heat source device;
With
In the air-conditioning control system according to claim 1,
The central heat source device is provided with two systems,
The first central heat source device supplies cold water or hot water to the outside air coil,
The second central heat source device supplies cold water or hot water to the return air coil.
An air conditioner, a water pump, an air conditioning control device that controls the operation of the air conditioner and the water pump, and the temperature of the air conditioning control target that is installed corresponding to each indoor or indoor control zone. And an air conditioning control system connected to a measuring device for measuring humidity,
The measuring device is
A measurement value transmission unit that acquires the temperature measurement value and the humidity measurement value measured in the indoor or indoor control zone of the air conditioning control target, and transmits to the air conditioning control device,
The air conditioner
A coil for outside air that takes in a predetermined amount of outside air and adjusts the temperature and humidity of the taken-in outside air based on the temperature setting value and the humidity setting value acquired from the air conditioning control device;
A return air coil that takes in a predetermined amount of return air from the air-conditioning control target room or an indoor control zone, and adjusts the temperature of the acquired return air based on a temperature setting value acquired from the air-conditioning control device;
Generates air in which the outside air whose temperature and humidity are adjusted by the outside air cooling coil and the return air whose temperature is adjusted by the return air cooling coil are mixed, and the room to be air-conditioned is controlled or a control zone in the room A blower fan for blowing the air mixed in
With
The water pump is
Based on the flow rate value acquired from the air conditioning control device, comprising a water supply unit for supplying cold water or hot water supplied from the outside to at least one of the outside air coil and the return air coil of the air conditioner,
The air conditioning control device
A measurement value acquisition unit that acquires the temperature measurement value and the humidity measurement value transmitted from the measurement value transmission unit of the measurement device;
A comfort index range storage unit that stores a target setting range of a comfort index set in advance;
Based on the temperature measurement value and the humidity measurement value acquired by the measurement value acquisition unit, within the target setting range of the comfort index stored in the comfort index range storage unit, the outside air coil, the return air An air conditioner set value calculation unit that calculates a temperature set value and a humidity set value of the air supplied from the air conditioner so that a total value of energy consumption of each of the coil, the water pump, and the blower fan is minimized. When,
A set value transmitting unit for transmitting the temperature set value and the humidity set value calculated by the air conditioner set value calculating unit to the air conditioner;
From the temperature setting value and the humidity setting value calculated by the air conditioner set value calculation unit, a flow rate value of the cold water or hot water is calculated and transmitted to the water pump;
With
In the air-conditioning control system according to claim 1 or 3,
The air conditioner set value calculation unit of the air conditioning control device calculates a wind speed set value in addition to the temperature set value and the humidity set value,
The set value transmission unit of the air conditioning control device transmits a wind speed set value to the air conditioner in addition to the temperature set value and the humidity set value,
The blower fan of the air conditioner blows the mixed air into the air-conditioning control target room or the indoor control zone based on the wind speed setting value acquired from the air-conditioning control device.
In the air-conditioning control system according to claim 1 or 3,
The measurement device further measures the carbon dioxide concentration in the indoor or control zone of the indoor air conditioning control target,
The measurement value transmission unit of the measurement device further acquires a measurement value of the carbon dioxide concentration measured in the indoor or control room of the air conditioning control target, and transmits the measurement value to the air conditioning control device.
The measurement value acquisition unit of the air conditioning control device further acquires the measurement value of the carbon dioxide concentration from the measurement value transmission unit of the measurement device,
The air conditioner set value calculation unit of the air conditioning control device has a range of comfort indices stored in the comfort index range storage unit, and cooling is required by the air conditioner, so that the enthalpy of the outside air is greater than the enthalpy of the room. The amount of outside air taken in is increased, the load of the outside air cooling coil is higher than a predetermined value, and the measured value of the carbon dioxide concentration acquired by the measured value acquisition unit is a preset carbon dioxide concentration limit. When the value is higher than the value, the outside air amount setting value to be taken in by the outside air coil is further calculated so as to take in the minimum amount of outside air for making the indoor carbon dioxide concentration lower than the carbon dioxide concentration limit value. ,
The set value transmission unit of the air conditioning control device transmits an outside air amount set value taken in by the outside air coil calculated by the air conditioner set value calculation unit to the air conditioner,
The outside air coil of the air conditioner takes in outside air based on an outside air amount setting value transmitted from the set value transmission unit of the air conditioning control device.
In the air-conditioning control system according to claim 1 or 3,
The measuring device further measures the number of people in the room or the control zone in the room subject to air conditioning control,
The measurement value transmission unit of the measurement device further acquires a measurement value of the number of occupants measured in the indoor or control room of the air conditioning control target, and transmits the measurement value to the air conditioning control device.
The measurement value acquisition unit of the air conditioning control device further acquires a measurement value of the number of people in the room from the measurement value transmission unit of the measurement device,
The air conditioner set value calculation unit of the air conditioning control device has a range of comfort indices stored in the comfort index range storage unit, and cooling is required by the air conditioner, so that the enthalpy of the outside air is greater than the enthalpy of the room. When the temperature is lower, the intake amount of outside air is increased, and when the load of the outside air cooling coil is higher than a predetermined value and the measured number of people in the room is higher than the predetermined value, the indoor carbon dioxide concentration is set in advance. Further calculating an outside air amount set value to be taken in by the outside air coil so as to take in a minimum amount of outside air for lowering the set carbon dioxide concentration limit value,
The set value transmission unit of the air conditioning control device transmits an outside air amount set value taken in by the outside air coil calculated by the air conditioner set value calculation unit to the air conditioner,
The outside air coil of the air conditioner takes in outside air based on an outside air amount setting value transmitted from the set value transmission unit of the air conditioning control device.
In the air-conditioning control system according to claim 1 or 3,
The outside air coil and the return air coil are connected in series,
Cold water or hot water used in the outside air coil is reused in the return air coil.