KR102032811B1 - Appratus and method of reducing energy consumption using removed heat capacity of refrigerator - Google Patents

Abstract

The present invention relates to a device and method for reducing energy consumption using heat extraction of a refrigerator. The present invention comprises: an operating environment collection unit for collecting an outlet temperature, an inlet temperature, and the amount of the circulating medium, and the power consumption of a heating, ventilation, and air conditioning (HVAC) system as an operating environment for each of a refrigerator and an air handling unit (AHU) in the HVAC system; a heat extraction calculation unit for calculating heat extraction depending on the outflow and inflow of the circulating medium related to the refrigerator; and an energy control unit for controlling the HVAC system by determining an optimum power consumption of the HVAC system based on the amount of heat extraction in the operating environment. Therefore, the present invention can calculate a cold water inlet temperature and an air supply temperature based on the temperature difference of the data with the minimum power consumption and the cold water outlet temperature and the ventilation temperature of the measured data.

Description

APPARATUS AND METHOD OF REDUCING ENERGY CONSUMPTION USING REMOVED HEAT CAPACITY OF REFRIGERATOR}

The present invention relates to a technology for reducing energy consumption using the removed calories of a refrigerator, and more particularly, to an apparatus and method for reducing energy consumption using the removed calories of a refrigerator, which can minimize the consumption of cooling energy while maintaining an appropriate room temperature. will be.

The HVAC (Heating, Ventilation & Air Conditioning) system is a technology used for the comfort of the indoor environment. The purpose of air conditioning is to integrate the functionality of the target building to satisfy temperature, humidity, airflow, and cleanliness in any given space. To adjust the quality and quantity of air. In buildings, HVAC system includes building cost, energy consumption, energy load at maximum load, space configuration of system, allowance and countermeasures for noise and vibration, supply system and automatic control of heat source, and control method with information management. Balance needs to be made to suit all conditions. In addition, since most of the energy consumed for cooling in the HVAC system is used to make cold water, it is possible to save energy while maintaining a comfortable indoor environment by making the cool water at an appropriate temperature and adjusting the air supply temperature to maintain the indoor temperature. .

Korean Patent Laid-Open Publication No. 10-2012-0123335 (2012.11.08) relates to an HVAC control system and method, which includes: (a) developing an initial thermal model of a building, and over time (B) using the thermal model to continuously develop a daily HVAC operation plan for the building, and (c) continuously checking the current HVAC operation plan and aligning the current HVAC operation. ) Is optimized to the current HVAC operation plan.

Korean Laid-Open Patent Publication No. 10-2014-0045623 (2014.04.17) relates to an integrated control system of an HVAC system, which enables stable power supply and control by integrating and controlling equipment included in an HVAC system, and separately for each device. Since the state of the equipment is controlled by the equipment control device without the controller, the space in the structure can be saved, and power management and control of the connected HVAC equipment is performed to prevent malfunctions and mistakes during normal or maintenance. It can increase stability and efficiency.

Korean Unexamined Patent Publication No. 10-2012-0123335 (2012.11.08) Korean Unexamined Patent Publication No. 10-2014-0045623 (2014.04.17)

One embodiment of the present invention is to provide an apparatus and method for reducing energy consumption using heat removal from the refrigerator, which can minimize consumption of cooling energy while maintaining an appropriate room temperature.

One embodiment of the present invention is to provide an apparatus and method for reducing energy consumption using calorie removal calories that can calculate a cooling load in real time and set an optimized cold inlet temperature and an air supply temperature.

An embodiment of the present invention is to reduce the energy consumption by using the heat removal of the refrigerator to calculate the cold inlet temperature and the air supply temperature based on the temperature difference of the data to minimize the power consumption and the cold water outlet temperature and the ventilation temperature of the measured data. An apparatus and method are provided.

Among the embodiments, the energy saving device using the removal heat of the refrigerator may include the outlet temperature, the inlet temperature and the medium of the circulating medium for each of the refrigerator and the air handling unit (AHU) in the heating, ventilation & air conditioning (HVAC) system. An operating environment collection unit for collecting a quantity and power consumption of the HVAC system as an operating environment, a removal calorie calculation unit configured to calculate a removal calorie according to the outflow and inflow of the circulation medium related to the refrigerator, and the removal calorific value in the operating environment; And an energy controller for controlling the HVAC system by determining an optimum power consumption of the HVAC system.

The removal calorific value calculation unit may calculate a constant for the removal calorie value through a product of the difference between the inflow and outflow temperature of the circulating medium and the medium amount of the freezer.

The energy control unit may detect data corresponding to the removed calorific value from the collected operating environment data and determine, as the optimum power consumption data, a case in which the power consumption of the HVAC system is the smallest among the detected data.

The energy controller subtracts the current inlet temperature of the circulating medium for each of the refrigerator and the air conditioner by the temperature difference of each circulating medium included in the optimum power consumption data as the optimum outlet temperature for each of the refrigerator and the air conditioner. You can decide.

The energy control unit may control at least one of the refrigerator and the cold water pump based on the optimum outflow temperature of the refrigerator.

The energy control unit may control at least one of an air supply fan and a ventilation fan based on the optimum outflow temperature of the air conditioner.

The energy control unit may provide a check necessity notification of the HVAC system when the difference between the optimum power consumption and the current power consumption collected by the operating environment collection unit exceeds a specific criterion.

Among the embodiments, the energy saving method using the removal heat of the freezer is an outlet temperature, inlet temperature and medium of the circulating medium for each of the freezer and air handling unit (AHU) in the heating, ventilation & air conditioning (HVAC) system Collecting the amount and the power consumption of the HVAC system as an operating environment, calculating a calorific value according to the outflow and inflow of the circulation medium with respect to the refrigerator, and based on the calorific value of the HVAC system in the operating environment. Determining the optimum power consumption to control the HVAC system.

The disclosed technique can have the following effects. However, since a specific embodiment does not mean to include all of the following effects or only the following effects, it should not be understood that the scope of the disclosed technology is limited by this.

An apparatus and method for reducing energy consumption using calorie removal heat according to an embodiment of the present invention may calculate a cooling load in real time and set an optimized cold water inlet temperature and an air supply temperature.

An apparatus and method for reducing energy consumption using a calorie removal calorie according to an embodiment of the present invention are based on a temperature difference of data at which power consumption is minimized and a cold water outlet temperature and a ventilation temperature of measured data. Can be calculated.

1 is a view for explaining a system for reducing energy consumption using calories removed from the refrigerator according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating one embodiment of the HVAC system in FIG. 1.
3 is a view for explaining a connection relationship between the energy consumption reduction device and the HVAC system in FIG.
FIG. 4 is a block diagram illustrating an apparatus for reducing energy consumption of FIG. 1.
FIG. 5 is a flowchart illustrating an HVAC system control process performed in the energy consumption reducing apparatus of FIG. 1.
FIG. 6 is a flowchart illustrating an embodiment of an HVAC system control process performed in the energy consumption reduction apparatus of FIG. 1.

Description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as limited by the embodiments described in the text. That is, since the embodiments may be variously modified and may have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, the objects or effects presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as "first" and "second" are intended to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, the first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being "connected" to another component, it should be understood that there may be other components in between, although it may be directly connected to the other component. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in between. On the other hand, other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to", should be interpreted as well.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprise" or "have" refer to a feature, number, step, operation, component, part, or feature thereof. It is to be understood that the combination is intended to be present and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts or combinations thereof.

In each step, an identification code (e.g., a, b, c, etc.) is used for convenience of description, and the identification code does not describe the order of the steps, and each step clearly indicates a specific order in context. Unless stated otherwise, they may occur out of the order noted. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be embodied as computer readable code on a computer readable recording medium, and the computer readable recording medium includes all kinds of recording devices in which data can be read by a computer system. . Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. Generally, the terms defined in the dictionary used are to be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

1 is a view for explaining a system for reducing energy consumption using calories removed from a refrigerator according to an embodiment of the present invention.

Referring to FIG. 1, the energy consumption reduction system 100 using the removal calorie of the refrigerator may include an HVAC system 110, an energy consumption reduction device 130, and a database 150.

The HVAC (Heating, Ventilation & Air Conditioning) system 110 integrates the functionality of the building for the comfort of the indoor environment and adjusts the quality and quantity of air to satisfy temperature, humidity, airflow, cleanliness, etc. in any given space. It may correspond to the air conditioning system to be adjusted. The HVAC system 110 is described in more detail in FIG. 2.

The energy saving device 130 corresponds to a computer or program that is connected to the HVAC system 110 to automatically adjust the cold water temperature and the air temperature so that the HVAC system 110 saves energy consumption while maintaining the proper room temperature. It can be implemented as a server. The energy saving device 130 may be wirelessly connected to the HVAC system 110 through a wired or Bluetooth, WiFi, and the like, and may exchange data with the HVAC system 110 through a network.

In one embodiment, the energy saving device 130 may be implemented including a database 150, and may be implemented separately from the database 150. When implemented separately from the database 150, the energy saving device 130 may be connected to the database 150 to transmit and receive data.

The database 150 may store various information that the energy saving device 130 uses to control the HVAC system 110. For example, the database 150 may store operating environment related data collected from the HVAC system 110, and may store the removal calories of the refrigerator or the optimal power consumption of the HVAC system 110 calculated based on the operating environment data. In some embodiments, the energy saving device 130 may store information collected or processed in various forms in the energy saving process.

The database 150 may be composed of at least one independent sub-databases that store information belonging to a specific range, and may be configured as an integrated database in which at least one independent sub-databases are integrated into one. In the case of at least one independent sub-database, each sub-database may be wirelessly connected through Bluetooth, WiFi, and the like, and may exchange data with each other through a network. In the case of an integrated database, the sub-databases may be integrated into one and may include a control unit that manages data exchange and control flow between the sub-databases.

FIG. 2 is a diagram illustrating one embodiment of the HVAC system in FIG. 1.

Referring to FIG. 2, the basic configuration of the HVAC system 110 may be confirmed. The HVAC system 110 is aimed at air conditioning in order to maintain a comfortable indoor environment for a specific space of the room 270, and may include a cooling tower 210, a refrigerator 230, and an air conditioner 250.

Cooling tower 210 may correspond to a device for cooling the heat of the freezer generated during the operation of the freezer 230 to release to the outside. The cooling tower 210 may discharge heat of the freezer 230 to the outside using various methods. For example, the cooling tower 210 may circulate the coolant 211 using the coolant pump 213 and the freezer 230. The heat of the circulating cold water 231 may be transferred to the cooling water 211 and then released to the outside through the cooling fan.

The refrigerator 230 may correspond to an apparatus for cooling the air circulating in the air conditioner 250. The refrigerator 230 may be implemented by being connected to a cold water coil included in the air conditioner 250. The refrigerator 230 may cool the air by transferring heat of air to cold water in the process of passing air circulating the air conditioner into the cold water coil. have. The refrigerator 230 may include a cold water pump 233 to circulate the cold water 231.

An air handling unit (AHU) 250 may correspond to a device capable of circulating the cooled air to cool air in a specific space corresponding to the indoor 270 that is a cooling target. The air conditioner 250 may include an air supply fan and a ventilation fan 253 to circulate air, and may include a cold water coil connected to the refrigerator 230. The air conditioner 250 may send the cooled air supply 251 to the room 270 through the cold water coil through the air supply fan, and the ventilation 255 warmed due to the heat of the room 270 through the ventilation fan 253. By sending the to the air conditioner 250 can circulate the internal air.

In FIG. 2, the total power consumption used by the HVAC system 110 to cool the air in the room 270 is represented as follows.

P _total = P _{ct_fan} + P _{ct_pump} + P _chiller + P _{cw_pump} + P _fan

Here, P _{ct_fan} represents the power consumption of the cooling fan included in the cooling tower 210, P _{ct_pump} represents the power consumption of the cooling water pump 213 included in the cooling tower 210, P _chiller is the P _{cw_pump} represents power consumption of the cold water pump 233 included in the refrigerator, and P _fan represents power consumption of the fan included in the air conditioner 250. That is, P _fan = P _{sa_fan} + _{Pra_fan} , P _{sa_fan} represents power consumption of the supply fan, and P _{ra_fan} represents power consumption of the ventilation fan 253.

The power consumption of the cooling tower 210 in the HVAC system 110 may be equal to the sum of the power consumption for the cooling fan and the cooling water pump 213, the power consumption of the cooling tower 210 is smaller than the total power consumption. Since there is little variation, the value of P _chiller + P _{cw_pump} + P _fan takes up a significant portion of the total power consumption. The power consumption of each device varies depending on the manufacturer and capacity, but in general, the ratio of power consumption for each device can be roughly equivalent to the ratio of _chiller : P _{cw_pump} : P _fan = 80: 5: 15. have.

Accordingly, in order to save energy consumption of the HVAC system 110, it may be most effective to reduce the power consumption of the refrigerator 230, and the power consumption of the refrigerator 230 may be closely related to the load of the refrigerator 230. Can be. Here, the load of the freezer 230 may correspond to the amount of heat removed from the freezer 230. The amount of heat removed from the freezer 230 may correspond to the amount of heat removed through the freezer 230. The amount of heat removed is expressed as a constant as follows.

K _chiller = △ T _cw * M _cw

Here, K _chiller represents the removal calorie constant of the refrigerator 230, ΔT _cw represents the cold water inlet and outlet temperature difference, M _cw represents the cold water flow rate. ΔT _cw = T _{cw_out} -T _{cw_in} , T _{cw_out} denotes the cold water outlet temperature, and T _{cw_in} denotes the cold water inlet temperature.

Similar to the amount of heat removed in the refrigerator 230, the amount of heat removed in the air conditioner 250 may be calculated, and the amount of heat removed in the air conditioner 250 may be expressed as a constant.

K _ahu = △ T _air * M _air

Here, K _ahu represents a removal calorie constant of the air conditioner 250, ΔT _air represents an air temperature difference, and M _air represents an air flow rate. ΔT _air = T _ra -T _sa , where T _ra represents the ventilation temperature and T _sa represents the air supply temperature.

The air flow rate is related to the power consumption of the air supply fan and the ventilation fan 253, the air supply temperature is deeply related to the removal heat of the refrigerator 230, and if the cold water inlet temperature is determined, it can be adjusted by the cold water flow rate. have. That is, the air supply temperature may be adjusted by the cold water flow rate (operating amount) of the cold water pump 233.

Energy saving device 130 is a cold water inlet and outlet temperature difference (ΔT _cw ) according to the calorific value of the freezer 230 removed from the fact that the heat content of the air conditioner and the removal of the air conditioner 250 is proportional to the calorific value of the freezer 230, The relationship between the air temperature difference ΔT _air and the total power consumption may be measured and calculated from the HVAC system 110 and stored in the database 150.

The HVAC system 110 may change the amount of energy used according to the setting of the cold water inlet temperature and the air supply temperature. In addition, since the efficiency of the refrigerator 230 is changed according to the load (removal heat amount) of the refrigerator 230, the energy saving device 130 adjusts the cold water supply temperature and the air supply temperature according to the load of the refrigerator 230 to freeze the refrigerator. The efficiency of 230 may be optimized.

3 is a view for explaining a connection relationship between the energy saving device and the HVAC system in FIG.

Referring to FIG. 3, the energy saving device 130 includes a cold water inlet temperature 311, a cold water outlet temperature 313, an air supply temperature 331, and a ventilation temperature 333 through a plurality of sensors included in the HVAC system 110. ) Can be measured and collected, the calorific value of the freezer 230 can be calculated based on the collected data, and the total power consumption of the HVAC system 110 is calculated based on the calorie removed calorie of the freezer 230. Optimum power consumption of each of the refrigerator 230 and the air conditioner 250 may be determined.

The energy saving device 130 may control the HVAC system 110 by calculating the cold water inlet temperature 311 of the refrigerator 230 and the air supply temperature 331 of the air conditioner 250 based on the optimum power consumption. For example, the energy saving device 130 may control the power consumption of the refrigerator 230 and the cold water pump 233 in accordance with the optimum cold water inlet temperature 311, and supply the air in accordance with the optimum air supply temperature 331. Power consumption of the fan 320 and the ventilation fan 253 may be controlled.

4 is a block diagram illustrating the energy saving device of FIG. 1.

Referring to FIG. 4, the energy saving device 130 may include an operating environment collector 410, a removal calorie calculator 430, an energy controller 450, and a controller 470.

The operating environment collection unit 410 is configured to display the outlet temperature, the inlet temperature and the amount of the circulating medium, and the power consumption of the HVAC system 110 for each of the refrigerator 230 and the air conditioner 250 in the HVAC system 110. Can be collected as. The operating environment collector 410 may collect the data from each device constituting the HVAC system 110 at a specific time point and store the data in the database 150 in association with the specific time point.

Herein, the circulating medium may correspond to a material circulating through the freezer 230 or the air conditioner 250 corresponding to an energy consuming device (hereinafter, referred to as an energy consuming device). The circulating medium may correspond to cold water as a liquid when the energy consuming device is the refrigerator 230, and the circulating medium may correspond to air as a gas when the air conditioner 250 is used.

The outlet temperature of the circulating medium may correspond to the temperature when it flows out of each energy consuming device, and the inlet temperature of the circulating medium may correspond to the temperature when it flows into each energy consuming device. When the energy consumption device is the refrigerator 230, the outflow temperature may correspond to the cold inlet temperature 311, and the inflow temperature may correspond to the cold outlet temperature 313. When the energy consumption device is the air conditioner 250, the outflow temperature may correspond to the air supply temperature 331, and the inflow temperature may correspond to the ventilation temperature 333.

In one embodiment, the operating environment collection unit 410 may collect the operating environment for each of the at least one energy consumer in the HVAC system 110 in real time or periodically. In another embodiment, the operating environment collection unit 410 provides an operating environment for each of the at least one energy consumer in the HVAC system 110 each time the temperature of the room 270 is changed by the HVAC system 110. Can be collected. For example, the operating environment collector 410 may collect data about the operating environment from the HVAC system 110 whenever the temperature of the room 270 increases or decreases by one degree.

In one embodiment, the operating environment collector 410 may collect the operating environment from the HVAC system 110 according to the cycle calculated through the following equation (1).

[Equation 1]

Here, C ₁ is a period, k is a proportional constant, P _T is the total power consumption, P _chiller is the power consumption of the refrigerator, P _ahu is the power consumption of the air conditioner. The operating environment collection unit 410 according to the period C ₁ calculated based on a value obtained by dividing the sum of the total power consumption and the power consumption of the refrigerator 230 by the power consumption of the air conditioner 250 divided by the cubed value. The operating environment can be collected from the HVAC system 110.

In one embodiment, the operating environment collector 410 may collect the operating environment from the HVAC system 110 according to the cycle calculated through the following equation (2).

[Equation 2]

Here, C ₂ denotes a period, k denotes a proportional constant, T _{cw_out} denotes a cold water outlet temperature, T _ra denotes a ventilation temperature, T _{cw_in} denotes a cold water inlet temperature, and T _sa denotes an air supply temperature. The operating environment collection unit 410 may collect the operating environment from the HVAC system 110 according to the cycle C ₂ calculated based on the sum of the cold water outlet temperature and the ventilation temperature divided by the sum of the cold water inlet temperature and the air supply temperature. have.

The removal calorific value calculating unit 430 may calculate the calorific value according to the outflow and inflow of the circulation medium related to the freezer 230. Refrigerator 230 corresponds to an energy consumer that has the greatest impact on the overall power consumption of HVAC system 110 by using the most power consumption in the temperature change of indoor air that the HVAC system 110 is about to finally cool. can do. The removal calorific value calculation unit 430 may calculate the removal calorific value using the cold water inlet temperature 311 and the cold water outlet temperature 313 of the cold water circulating in the freezer 230.

In one embodiment, the removal calorific value calculation unit 430 may calculate a constant for the calorific value of heat through the product of the difference between the inflow and outflow temperature of the circulating medium and the amount of the medium with respect to the freezer (230). The removal calorific value calculating unit 430 may calculate the difference between the inflow and outflow temperature of the cold water of the freezer 230 through the cold water inlet temperature 311 and the cold water outlet temperature 313, and multiply the cold water flow rate to calculate a constant for the calorific value of the calorific water. have. In another embodiment, the operating environment collection unit 410 may include a database 150 along with operating environment data collected at each specific time of removal energy of each energy consuming device calculated at the specific time calculated by the removal heat calculation unit 430. ) Can be stored.

The energy controller 450 may control the HVAC system 110 by determining an optimum power consumption of the HVAC system 110 based on the amount of heat removed from the operating environment. In one embodiment, the energy controller 450 may determine the most optimized power consumption combination in the current operating environment through a combination of power consumptions of the respective energy consuming devices constituting the HVAC system 110. The energy control unit 450 compares the total power consumption according to the power consumption combination with the current total power consumption collected by the operating environment collection unit 410, and selects a better case, and according to the result, the heat exchange energy system 110. ), Energy can be saved.

In one embodiment, the energy control unit 450 may be composed of a refrigerator control unit for controlling the refrigerator 230, a cold water pump control unit for controlling the cold water pump 233, an air conditioner control unit for controlling the air conditioner (AHU) (250). . The air conditioner controller may include an air supply fan controller and a ventilation fan controller.

In one embodiment, the energy control unit 450 may detect the data corresponding to the current removal heat of the refrigerator 230 among the operating environment data collected by the operating environment collection unit 410, and the HVAC system among the detected data. The smallest power consumption of 110 can be determined as the optimal power consumption data. The energy control unit 450 includes the cold water outlet temperature 313 and the ventilation temperature 330 collected by the refrigerator 230 inflow and outflow temperature difference, the air conditioner 250 inflow and outflow temperature difference, and the operating environment collection unit 410 in the optimum power consumption data. ) To control the HVAC system 110.

In one embodiment, the energy control unit 450 subtracts the present inlet temperature of the circulating medium for each of the refrigerator 230 and the air conditioner 250 by the temperature difference of each circulating medium included in the optimum power consumption data. And the optimum outlet temperature for each of the air conditioners 250 can be determined. That is, the optimum outflow temperature of the refrigerator 230 may be calculated through 'current inflow temperature-difference in cold water inflow and outflow temperature on optimal power consumption data', and the optimum outflow temperature of the air conditioner 250 is 'current inflow temperature-optimal consumption'. The air temperature difference on the power data.

In one embodiment, the energy controller 450 may control at least one of the refrigerator 230 and the cold water pump 233 based on the optimum outflow temperature for the refrigerator 230. The energy controller 450 may adjust the power consumption of the refrigerator 230 and the cold water pump 233 according to the cold water inlet temperature 311 corresponding to the optimum outflow temperature.

In one embodiment, the energy controller 450 may control at least one of the air supply fan 320 and the ventilation fan 253 based on the optimum outflow temperature for the air conditioner 250. The energy controller 450 may adjust the power consumption of the air supply fan 320 and the ventilation fan 253 according to the air supply temperature 331 corresponding to the optimum outflow temperature.

In one embodiment, the energy controller 450 provides a notification that the HVAC system 110 needs to be checked if the difference between the optimal power consumption and the current power consumption collected by the operating environment collector 410 exceeds a certain criterion. can do. The energy control unit 450 may determine the optimum power consumption in the current operating environment, and if the current power consumption shows a large difference out of a predetermined reference range, the operation of the current HVAC system 110 is problematic. Can be present, so the user interface can indicate that it needs to be inspected in various forms.

For example, the energy controller 450 may display a check message on the display device through a user interface, and output a sound indicating that the check is necessary through the sound device. Accordingly, the manager may perform a check on the HVAC system 110 through the check necessity notification by the energy control unit 450.

The controller 470 may control the overall operation of the energy saving device 130 and may manage a control flow or data flow between the operating environment collector 410, the removal calorie calculation unit 430, and the energy controller 450. .

FIG. 5 is a flowchart illustrating an energy saving process performed in the energy saving device of FIG. 1.

Referring to FIG. 5, the energy saving device 130 includes an outlet temperature, an inlet temperature, and an outlet temperature of a circulating medium for each of the refrigerator 230 and the air conditioner 250 in the HVAC system 110 through the operating environment collector 410. The amount of medium and power consumption of the HVAC system 110 may be collected as an operating environment (step S510).

The energy saving device 130 uses the removal calorie calculation unit 430 to control the outflow and inflow of the circulating medium regarding the refrigerator 230 which has the greatest influence on the total power consumption among the energy consuming devices constituting the HVAC system 110. The amount of heat removed can be calculated (step S530). The energy saving device 130 may control the HVAC system 110 by determining an optimum power consumption of the HVAC system 110 based on the amount of heat removed from the operating environment through the energy control unit 450 (step S550).

6 is a flowchart illustrating an embodiment of an energy saving process performed in the energy saving device of FIG. 1.

Referring to FIG. 6, the energy saving device 130 collects cold water inlet / outlet temperature difference, cold water flow rate, air supply / ventilation temperature difference, and total power consumption data of the HVAC system 110 through the operating environment collection unit 410. It can be stored in the database 150 (step S610).

The energy saving device 130 may calculate the calorific value of the current refrigerator 230 from the data measured by the calorific value calculator 430 (step S620). The energy saving device 130 may search for data corresponding to the removal heat of the current refrigerator 230 among the data stored in the database 150, and sort the searched data in ascending order based on the power consumption to minimize the consumption. The optimal power consumption data corresponding to the power may be selected (step S630).

The energy saving device 130 may calculate the optimum cold water inlet temperature and the air supply temperature based on the cold water inlet / outlet temperature difference and the air supply / ventilation temperature difference, the current cold water outlet temperature, and the ventilation temperature included in the optimal power consumption data ( Step S640). The energy saving device 130 may determine whether the cold inlet temperature and the air supply temperature measured at the present time point are the same as the optimum cold water inlet temperature and the air supply temperature calculated based on the optimal power consumption data (step S650). If the measured data is different from the calculated data, the HVAC system 110 may be controlled according to the calculated optimal cold water inlet temperature and air supply temperature (step S660).

If the measured data and the calculated data are the same, the HVAC system 110 may be operated for a predetermined time while maintaining the current operating conditions without additional control (step S670). The energy saving device 130 may collect and store operating environment data from the HVAC system 110 periodically or in real time in the database 150 while controlling the operation of the HVAC system 110, and may be stored in the database 150. If operating environment data is accumulated over a certain size may be used for energy saving of the HVAC system (110).

In one embodiment, when the operating environment data stored in the database 150 exceeds a preset size, the energy saving device 130 may delete the oldest data to prevent the operating environment data from growing larger than a predetermined size. In another embodiment, the energy saving device 130 when the operating environment data of the same condition as the collected operating environment data is already stored in the database 150, the operating environment newly collected operating environment data stored in the past Can be updated with data.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

100: energy saving system using the calorific value of the freezer
110: HVAC system 130: energy saving device
150: database
210: cooling tower 211: cooling water
213: cooling water pump 230: refrigerator
231: cold water 233: cold water pump
250: AHU 251: air supply
253: ventilation fan 255: ventilation
270: indoor
310: cold water coil 320: air supply fan
311: cold water inlet temperature 313: cold water outlet temperature
331: supply air temperature 333: ventilation temperature
410: operating environment collection unit 430: removal calorie calculation unit
450: energy control unit 470: control unit

Claims (8)

The outlet temperature, the inlet temperature and the volume of the circulating medium and the power consumption of the HVAC system for each of the refrigerators and air handling units (AHUs) operating in conjunction with each other in the HVAC (Heating, Ventilation & Air Conditioning) system An operating environment collecting unit for collecting as an operating environment;
A removal calorie calculation unit configured to calculate removal calorie according to the outflow and inflow of the circulation medium related to the refrigerator; And
Determine the optimum power consumption of the HVAC system based on the removal heat in the operating environment, and control the operation of the interlocking operation between the refrigerator and the air conditioner based on the optimal outflow temperature of each circulation medium corresponding to the optimum power consumption Including an energy control unit for controlling the energy consumption of the HVAC system through,
The operating environment collecting unit collects the operating environment from the HVAC system according to a cycle calculated based on the outlet temperature and the inlet temperature of the circulation medium for each of the refrigerator and the air conditioner,
The operating environment is a database on the operating conditions of the HVAC system is energy saving device using the calorie removal calories of the refrigerator, characterized in that measured in the interlocking process between the refrigerator and the air conditioner and grouped by the calorific value.
The method of claim 1, wherein the calorie removal unit
Energy saving device using the removal calorie of the refrigerator, characterized in that for calculating the constant for the heat of removal through the product of the flow rate difference between the circulating medium and the amount of the medium.
The method of claim 1, wherein the energy control unit
Energy using the removed calorific value of the refrigerator, characterized in that the data corresponding to the calorific value is detected from the collected operating environment data, and the optimum power consumption data is determined when the power consumption of the HVAC system is the smallest among the detected data. Saving device.
The method of claim 3, wherein the energy control unit
And determining a value obtained by subtracting the temperature difference of each circulating medium included in the optimum power consumption data from the current inlet temperature of the circulating medium for each of the refrigerator and the air conditioner as the optimum outlet temperature for each of the refrigerator and the air conditioner. Energy saving device using the removed calories of the refrigerator.
The method of claim 4, wherein the energy control unit
And at least one of the refrigerator and the cold water pump based on the optimum outflow temperature for the refrigerator.
The method of claim 4, wherein the energy control unit
And at least one of an air supply fan and a ventilation fan based on the optimum outflow temperature of the air conditioner.
The method of claim 1, wherein the energy control unit
Energy saving device using the calorie removal calories of the refrigerator characterized in that the notification of the need to check the HVAC system when the difference between the optimum power consumption and the current power consumption collected by the operating environment collection unit exceeds a specific criterion .
In the energy saving method performed in the energy saving device using the removal heat of the refrigerator,
The outlet temperature, the inlet temperature and the volume of the circulating medium and the power consumption of the HVAC system for each of the refrigerators and air handling units (AHUs) operating in conjunction with each other in the HVAC (Heating, Ventilation & Air Conditioning) system Collecting as an operating environment;
Calculating the amount of heat removed according to the outflow and inflow of the circulation medium related to the freezer; And
Determine the optimum power consumption of the HVAC system based on the removal heat in the operating environment, and control the operation of the interlocking operation between the refrigerator and the air conditioner based on the optimal outflow temperature of each circulation medium corresponding to the optimum power consumption Controlling the energy consumption of the HVAC system through;
The collecting step includes collecting the operating environment from the HVAC system according to a cycle calculated based on the outlet temperature and the inlet temperature of the circulating medium for each of the refrigerator and the air conditioner.
The operating environment is a database on the operating conditions of the HVAC system is energy saving method using the calorie removal calories of the refrigerator, characterized in that measured in the interlocking process between the refrigerator and the air conditioner and grouped by the calorific value.

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