KR20130122194A - Method for managing energy controlling temperature differential of chilled or hot water and apparatus thereof - Google Patents

Abstract

The present invention relates to an energy managing method for buildings and an energy managing device for the same to save power for a pump by controlling temperature difference between primary cold and hot water and returning cold and hot water, changing the flow rate of the pump, and maintaining pleasant indoor environment. The present invention reduces the energy consumption of the pump by effectively operating the heat source equipment of a building based on systematic data and adjusting the flow rate of the pump when the temperature difference between the primary cold and hot water and the returning cold and hot water is below a predetermined temperature or the pump has an excessive flow rate; and optimizes energy saving effects by periodically or seasonally monitoring the temperature difference between the primary cold and hot water and the returning cold and hot water based on the usage of an energy managing system and changing the flow rate of the pump to satisfy conditions for obtaining safety factors for heat source facilities and pleasant indoor environments for users. [Reference numerals] (10) Cool/hot water generator;(11a,11b,11c,11d,11e) Thermometer;(12a,12b) Flowmeter;(14) Cool water pump;(17) Heat exchanger;(AA) Cool water supply;(BB) Hot water supply;(CC) Hot water recovery;(DD) Cool water recovery;(EE) Air-supply fan

Description

Energy management method for controlling cold and hot water reciprocating temperature difference, and an energy management apparatus for the same {} Method for managing energy controlling temperature differential of chilled or hot water and apparatus

The present invention relates to a building energy management method and an energy management device for the same. More specifically, by changing the flow rate of the pump through the control of cold and hot water reciprocating temperature difference, by reducing the pump power, cold and hot water that can increase the efficiency for energy calories An energy management method through a reciprocating temperature difference control and an energy management apparatus for the same.

In Korea, which is highly dependent on the supply and demand of energy resources, imports of imported energy have not decreased, but are still increasing, even at the time of ultra high oil prices exceeding $ 100 per barrel. In light of these circumstances, technology development and application of energy saving in the building sector is considered as a very important field. In other words, as the industry develops, the number of buildings is increasing, and each building uses a lot of energy for air conditioning and operation of facilities. Energy consumption in buildings accounts for about 20% of total domestic consumption, and is increasing every year.

In particular, the efficient use of energy in buildings is an important factor that directly affects the landlord's economic aspects and the national infrastructure industry, and technology development and investment are urgently required.

Unreasonable energy use is also associated with inefficient operation and management of the facilities in the building.

Such energy saving methods in buildings include architectural planning approaches and facility approaches that improve the operating efficiency of energy-using devices and systems. In the facility field approach, it is necessary to create an appropriate environment and to operate an efficient facility system considering energy consumption and environmental conservation.

And, as a building owner, the energy consumption of a building is directly linked to the financial expenditure, so inefficient building energy consumption places a significant financial burden on the building owner. In order to solve these problems, improvement measures are required to efficiently and systematically manage the use of energy consumed in buildings.

In order to solve the above problems, an object of the present invention is to reduce the pump power by changing the flow rate of the pump through the control of cold and hot water reciprocating temperature difference, energy management method through the control of cold and hot water reciprocating temperature difference to increase the efficiency for energy calories and To provide an energy management device for.

Energy management device through the cold and hot water reciprocating temperature difference control according to an embodiment of the present invention for achieving the object as described above collects the operation information for the cold and hot water generator, the flow rate for at least one of the cold water pump or hot water pump Communication unit for transmitting a signal requesting a change, management data for examining the cold heat source and heating load pattern of the cold and hot water generator, operation information of the cold and hot water generator, data for changing the flow rate of at least one of the cold water pump and hot water pump Analyzing the operating trend of the storage unit and the cold and hot water generator to store the cold and hot water reciprocating temperature difference control setting, and compare the operation information collected through the communication unit cold water pump or hot water pump according to the cold and hot water reciprocating temperature difference of the cold and hot water generator To determine whether flow rate control is applied to the cold water pump or the hot water pump. When the control is required, is characterized in that a control unit for calculating the control values for the chilled water pumps, or water pump, and request that hot water generating device is controlled based on the control value.

In addition, in the energy management device by controlling the cold and hot water reciprocating temperature difference according to the present invention, the operation information is the operating state of the cold and hot water generator, air supply and ventilation temperature of the air conditioner, air supply and ventilation humidity of the air conditioner, cold water supply temperature of the cold and hot water generator, It characterized in that it comprises one or more of cold water return temperature, hot water supply temperature, hot water return temperature and the coil valve opening rate of the air conditioner.

In addition, in the energy management device by controlling the cold and hot water reciprocating temperature difference according to the present invention, the control unit checks the energy consumption of the cold prevention water, heating index and cold and hot water generator in the middle of the previous year, and confirmed the cold prevention water, heating index and energy consumption It is characterized by grasping the application period for changing the flow rate of the cold water pump.

In addition, in the energy management device by controlling the cold and hot water reciprocating temperature difference according to the present invention, the control unit calculates the cold and hot water reciprocating temperature difference by using the operation information monitored in real time, and compares the calculated hot and cold water reciprocating temperature difference and the predetermined reference cold and hot water reciprocating temperature difference When the calculated cold / hot water reciprocating temperature difference is lower than the reference cold / hot water reciprocating temperature difference, the flow rate of at least one of the cold water pump or the hot water pump may be changed.

In addition, in the energy management device by controlling the cold and hot water reciprocating temperature difference according to the present invention, the control unit is characterized in that for checking the cold and hot water reciprocating temperature difference while adjusting the flow rate for at least one of the cold water pump or hot water pump at a predetermined unit interval. .

In addition, in the energy management device by controlling the cold and hot water reciprocating temperature difference according to the present invention, the control unit monitors the cold and hot water generator after the flow rate of at least one of the cold water pump or hot water pump is changed, the result information obtained through the monitoring Analysis of the operation time for at least one of the cold water pump or hot water pump before and after the implementation, the energy consumption of at least one of the cold or hot water pump before and after the implementation, COP (Coefficient of performance) of the cold and hot water generator, air supply of the air conditioner and It is characterized in that the efficiency of the energy calorie according to at least one of the ventilation temperature and the air supply and ventilation humidity of the air conditioner.

In addition, in the energy management device by controlling the cold and hot water reciprocating temperature difference according to the present invention, the control unit determines whether the alarm occurs according to the abnormal operation of the cold and hot water generator after the flow rate for at least one of the cold water pump or the hot water pump is changed. And, if the alarm occurs, the flow rate for at least one of the cold water pump or hot water pump is characterized in that to readjust.

In addition, in the energy management device through the cold and hot water reciprocating temperature difference control according to the present invention, after the control unit changes the flow rate for at least one of the cold water pump or hot water pump, and confirms the decrease in pump power according to the flow rate change, and confirm The result is classified and stored in at least one of yearly, quarterly, monthly, weekly, daily, weekday.

In addition, in the energy management device through the cold and hot water reciprocating temperature difference control according to the present invention, the control unit predicts the first control value through the simulation based on the mathematical modeling for the flow rate control of the cold water pump or hot water pump, and the past management accumulated The second control value is set by correcting the first control value for controlling the flow rate of the cold water pump or the hot water pump through the data, and after the second control value is applied, the second control value according to the operation information obtained through real-time monitoring of the cold / hot water generator. The final control value for the flow rate of the cold water pump or the hot water pump is set from the control value, and the control of the cold / hot water generator is performed as the final control value.

Energy management method through the control of cold and hot water reciprocating temperature difference according to an embodiment of the present invention comprises the step of setting the application period of the cold and hot water reciprocating temperature difference control by the energy management device to analyze the operating trend of the cold and hot water generator, the operation of the energy management device is monitored Comparing the information to determine whether to apply the flow control of the cold water pump or hot water pump according to the cold and hot water reciprocating temperature difference of the cold and hot water generator, and if the flow control of the cold water pump or hot water pump is required, the energy management device is cold water pump or hot water Calculating a control value for the pump; and requesting that the hot and cold water generator be controlled based on the control value.

In addition, in the energy management method by controlling the cold and hot water reciprocating temperature difference according to the present invention, the energy management device monitors at least one of the heat exchanger type, equipment status, aging degree of the cold and hot water generator, and the information that the energy management device is monitored According to the characterized in that it further comprises the step of setting the hot water supply temperature.

In addition, in the energy management method by controlling the cold and hot water reciprocating temperature difference according to the present invention, the step of calculating the energy management device to predict the first control value through the simulation based on the mathematical modeling for the flow control of the cold water pump or hot water pump And setting a second control value by correcting the first control value for the flow rate control of the cold water pump or the hot water pump based on past management data in which the energy management device is accumulated. Setting a final control value for the flow rate of the cold water pump or the hot water pump from the second control value according to the operation information obtained through real-time monitoring, and performing the control of the cold / hot water generator as the final control value by the energy management device. Characterized in that.

In addition, in the energy management method by controlling the cold and hot water reciprocating temperature difference according to the present invention, the step of calculating the energy management device to confirm the monitoring result of the heat exchanger, the energy management device is less thermal efficiency due to the aging of the heat exchanger In this case, the method may further include resetting the control value in consideration of this.

According to the present invention, by constructing a network-based building energy management system, it is possible to minimize the construction cost for each building for energy management, and to build in stages through functional segmentation and modularization.

In addition, it provides real-time or period-based data analysis services through an integrated platform to maximize the efficiency of energy calories through systematic integrated management of multiple buildings, and continuously analyzes energy consumption patterns by analyzing web-based real-time or period-based energy consumption patterns. Condition checks and feedback can assist in energy saving activities.

In addition, when the cold and hot water reciprocating temperature difference is less than the predetermined predetermined temperature, that is, when the excess flow rate, the amount of energy generated by the pump can be reduced by adjusting the flow rate of the cold water pump or the hot water pump, and the heat source equipment of the building can be efficiently Can be used to reduce energy consumption.

In addition, the energy management system of the building monitors the difference between the hot and cold water reciprocating temperature periodically or seasonally, and changes the flow rate of the pump within the range that satisfies the safety factor of the heat source equipment and the comfort of the indoor occupants. Efficiency can be optimized.

1 is a view showing a schematic configuration of a cold heat source equipment to which the present invention is applied.
2 is a view showing the configuration of a building energy management system according to an embodiment of the present invention.
3 is a block diagram illustrating a configuration of an energy management apparatus according to an exemplary embodiment of the present invention.
4 is a block diagram illustrating a configuration of a facility control apparatus according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating an operation of an energy management apparatus through cold water reciprocating temperature difference control according to an embodiment of the present invention.
6 is a flowchart illustrating the operation of the energy management device through the control of the hot water reciprocating temperature difference according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms or words used in the specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, and the inventors are appropriate as concepts of terms for explaining their own invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

Prior to the description, the building energy management system according to an embodiment of the present invention is a system for improving energy performance while maintaining a comfortable indoor environment in a building, performing operating state monitoring and automatic control of a facility system in a building, and identifying energy usage. And comprehensive analysis of environmental variables (outside air, humidity) according to time and time, and based on this, it provides a service to increase the efficiency of energy energy of buildings.

Building energy management system according to the present invention is to apply the cold and hot water generator to provide a service for improving the efficiency of energy calories, periodically monitoring the season or use status of the safety rate of the hot and cold water generator and the comfort of the indoor occupants The flow rate of the cold water pump or the hot water pump may be changed to control the cold / hot water reciprocating temperature difference (ΔT) within a range satisfying the condition. For example, the load and load rate can be calculated as the specific heat of cold water reciprocating temperature difference (ΔT) * cold water flow rate * water, and if the flow rate is constant, the cold water reciprocating temperature difference can be 5 ℃ according to design or equipment specification, but it can actually be 3 ℃ In this case, the flow rate of the cold water pump may be changed by determining that the excess flow rate is about 40%. In addition, the load and the load ratio may be calculated by the specific heat of the hot water reciprocating temperature difference (ΔT) * hot water flow rate * water.

In addition, the cold and hot water reciprocating temperature difference on the building energy management system according to an embodiment of the present invention represents the temperature difference with respect to the supply temperature of the cold water discharged from the cold and hot water generator 10, the return temperature of the cold water supplied to the cold and hot water generator 10 The cold water reciprocating temperature difference is divided into a hot water reciprocating temperature difference representing a temperature difference with respect to a supply temperature of the hot water discharged from the cold and hot water generator 10, and a temperature difference with respect to the return temperature of the hot water received by the cold and hot water generator 10.

The cold and hot water generator of the present invention stops operation by operating the protective stop function in the cold and hot water generator when the cold and hot water flow rate is lowered below a predetermined level. If the cold / hot water generator does not operate the protection stop function, it may be determined that the cold / hot water generator is broken or a mechanical defect.

In addition, the cold and hot water generator of the present invention is different from the appropriate cold water, hot water flow rate according to the operating characteristics for each part load. In other words, the cold and hot water generator is different COP (Coefficient of performance) of the facility itself, grasp the operating characteristics suitable for the cold and hot water generator, and presents the operating conditions accordingly.

Hereinafter, an embodiment of the present invention will be described with respect to a method and apparatus for adjusting a cold / hot water reciprocating temperature difference by controlling a cold water pump or a hot water pump in a building energy management system.

1 is a view showing a schematic configuration of a cold heat source equipment to which the present invention is applied.

Referring to Figure 1, the cold heat source equipment according to the present invention is cold and hot water generator 10, cold water supply thermometer (11a), hot water supply thermometer (11b), hot water return thermometer (11c), cold water return thermometer (11d), air supply It may consist of a thermometer 11e, a cold water flow meter 12a, a hot water flow meter 12b, a hot water coil 13, a cold water pump 14, a cold water coil 15, a hot water pump 16, a heat exchanger 17. In addition, the cold and hot water reciprocating temperature difference of the building energy management system can be adjusted to maintain a comfortable environment indoors.

In addition, the building energy management system according to the present invention monitors the operating state of the cold and hot water generator 10, monitoring the cold water supply / return temperature, hot water supply / return temperature, cold water flow rate and hot water flow rate, etc. of the cold and hot water generator 10 can do. Here, the cold water supply temperature is the temperature of the cold water discharged to the cold water coil 15 through the cold water pump 14 based on the cold and hot water generator 10, the cold water return temperature is the cold and hot water generator 10 from the cold water coil (15) The temperature of the cold water obtained by). In addition, the hot water supply temperature is the temperature of the hot water output to the hot water coil 13 through the hot water pump 16 on the basis of the cold and hot water generator 10, the hot water return temperature is the cold and hot water generator (10) from the hot water coil (13) The temperature of the hot water obtained by).

In addition, the cold and hot water generator 10 includes a heat exchanger 17, the hot water supply temperature is set according to the heat exchanger type, equipment conditions, aging degree and the like.

On the other hand, prior to the control of the cold and hot water reciprocating temperature difference, the building manager reviews the indoor environmental management data, that is, the indoor temperature and humidity management indicators, and reviews the indoor temperature and humidity management standard document. In other words, review the comfort management index for each building.

2 is a view showing the configuration of a building energy management system according to an embodiment of the present invention.

Referring to FIG. 2, the building energy management system 100 according to the present invention includes an energy management device 20, a facility control device 30, and a communication network 40.

Building energy management system 100 according to an embodiment of the present invention is a building management system that is introduced to increase the energy performance while maintaining a comfortable indoor environment in the building. This system monitors the operation status of the facility system in the building and automatically controls the energy consumption and comprehensively analyzes environmental variables (temperature, humidity, carbon dioxide concentration) according to time zones, and based on this, It is a system that can increase. In particular, the building energy management system 100 is a building management system for optimizing the indoor environment and energy performance, collects the operating state and the energy consumption of equipment or systems, evaluates them appropriately, and establishes optimal automatic control and is inefficient. By identifying operating equipment and analyzing energy consumption, the system can ultimately increase the efficiency of energy calories.

In addition, the main targets of the building energy management system 100 are building equipment such as heat source equipment, air conditioning equipment, sanitation equipment, ventilation equipment, electrical equipment, lighting equipment, disaster prevention equipment, and security equipment in buildings. Sensors and instruments are used to monitor, operate, and automatically control the indoor environment or the condition of the equipment.

The communication network 40 of the building energy management system 100 according to an embodiment of the present invention performs a series of data transmission and reception operations for data transmission and information exchange between the energy management device 20 and the facility control device 30. . In this case, the facility control device 30 may be connected to the communication network 40, and may be connected to the energy management device 20 through the communication network 40. In addition, the facility control apparatus 30 may connect to the communication network 40 in various ways according to a protocol supporting the connection. For example, the facility control apparatus 30 may connect to the communication network 40 through a fixed access method such as a digital subscriber line (DSL), a cable modem, or an Ethernet. In addition, the facility control device 30 may be connected to the communication network 40 through a mobile access method. In addition, the facility control apparatus 30 may access the communication network 40 through a wireless access method such as a wireless local area network (WLAN), wireless fidelity (Wi-Fi), worldwide interoperability for microwave access (WiMAX), or the like. Can be.

In particular, the facility control device 30 is to control the overall function of the heat source equipment and air conditioning equipment of the building, and provides the operation information of the cold and hot water generator 10 for controlling the cold and hot water reciprocating temperature difference to the energy management device (20). . Then, when the facility control device 30 is requested to adjust the flow rate of the cold water pump 14 or the hot water pump 16 from the energy management device 20, the cold water pump 14 according to the control value set in the energy management device 20 Or adjust the flow rate of the hot water pump 16. In addition, the facility control device 30 monitors a plurality of operation information according to a monitoring request from the energy management device 20, and transmits the monitored operation information to the energy management device 20. More specifically, the facility control device 30 is the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the cold water supply temperature of the cold and hot water generator 10, cold water return temperature, Monitor alarm management items for hot water supply temperature, hot water return temperature, and air conditioner coil valve opening rate.

The energy management device 20 monitors the energy efficiency of a plurality of buildings, and manages the control values of the facility control device 30 of the corresponding building. That is, the energy management device 20 sets the control value of the equipment required to increase the efficiency of the energy calories of each building, and the facility control device 30 controls each facility based on this. At this time, the energy management device 20 communicates with the facility control device 30 located in each building through the communication network 40. In particular, the energy management device 20 collects the operation information of the cold and hot water generator 10 for a predetermined period, and monitors the cold and hot water reciprocating temperature difference based on the collected operation information. The energy management device 20 compares the cold / hot water reciprocating temperature difference based on the monitoring result. According to the comparison result, the energy management device 20 requests the facility controller 30 to change the flow rate for the cold water pump 14 or the hot water pump 16, and the cold water pump 14 or the hot water pump 16. Check the efficiency of energy calorie according to the flow rate change.

To this end, the energy management device 20 predicts the first control value through simulation based on mathematical modeling for the flow rate control of the cold water pump 14 or the hot water pump 16. Then, the energy management device 20 sets the second control value by correcting the first control value for the flow rate control of the cold water pump 14 or the hot water pump 16 through the accumulated management data. Subsequently, the energy management device 20 uses the cold water pump 14 or the hot water pump 16 from the second control value according to the operation information and the site situation obtained through real-time monitoring of the cold / hot water generator 10 after the second control value is applied. Set the final control value for the flow rate of), and controls the cold and hot water generator 10 to the set final control value.

In addition, the energy management device 20 after changing to the set control value, the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, cold water supply temperature of the cold and hot water generator 10 Monitor changes in cold water return temperature, hot water supply temperature, hot water return temperature, and air conditioning coil valve opening rate. In addition, the energy management device 20 analyzes the energy efficiency before and after the change of the overall energy consumption of the cold / hot water generator 10 after controlling the flow rate of the cold water pump 14 or the hot water pump 16.

In the building energy management system 100 according to the present invention, immediately after construction of a building, the heating and cooling load of the target building is not clear, and the tendency and load rate of the heat source equipment, the air conditioning equipment, and the heating and cooling load are unclear. Therefore, unless special circumstances occur, the application of cold / hot water reciprocating temperature difference control at the time of operation for one year or more should be examined and implemented. In addition, only the measurement of the operation information and the effect confirmation are usually performed, and the flow rate is changed when the heating and cooling operation is stopped. In other words, it is desirable to carry out the measurement and analysis to check the current state and the effect of the air conditioner in order to grasp the actual air-conditioning load, and in principle, it is desirable not to change the flow rate during the heating and cooling supply period. On the other hand, the measuring instrument (thermometer, pressure gauge, etc.) installed in the air conditioning facility according to the present invention, because the measurement error occurs over time, the calibration is performed regularly, and the calibration data obtained by automatic control is also periodically corrected Should give.

Looking at the process of confirming the opening degree of the cold water pump or hot water pump discharge valve according to the present invention, after confirming the number of revolutions from the full opening of the valve to the full closing, and adjusts the opening and closing by about 5%. The administrator checks the vibration, the leakage of the flange, and the movement of the dustproof joint. If there is no problem, tighten the valve to about 20% and check the difference between the cold and hot water reciprocating temperature. When the flow rate is reduced by 20%, the difference between the cold and hot water reciprocating temperature increases by about 1 ° C. As a result, the flow rate of cold or hot water is reduced, and thus the change in cold / hot water reciprocating temperature difference of the air conditioner coil can be confirmed. In this state, the operation is continued for 1-2 hours. If there is no abnormality, tighten the valve until the temperature difference between the cold and hot water of the air conditioner becomes the target temperature difference. For example, the target temperature difference may be 5 ° C. for cold water and 5 ° C. to 10 ° C. for hot water. At this time, the valve operation always checks whether there is an abnormality by about 5%, and proceeds step by step while checking the temperature difference.

Confirm the expected energy consumption and efficiency for cold and hot water reciprocating temperature difference control according to the present invention. At this time, as a preliminary review, look at the review items according to the presence or absence of the inverter (Inverter) installation of the cold water pump (14) or hot water pump (16). First, if there is an inverter in the cold water pump 14 or the hot water pump 16, the review item examines the total power consumption (kw) for the frequency before improvement (Hz) and the frequency after improvement (Hz) of the pump. In addition, the operating hours for daily hours, monthly hours, annual hours, and hours are reviewed, and investment costs for inverter installation and other costs are reviewed. .

That is, the power consumption of the cold water pump 14 or the hot water pump 16 is calculated by applying the frequency before controlling the cold / hot water reciprocating temperature difference and the appropriate frequency for securing the cold / hot water reciprocating temperature difference to the Law of similarity. Here, if the size of the impeller (Impeller) in the cold water pump 14 or hot water pump 16 is D, the rotation speed is N, the head is H, the feed flow rate is Q, and the power is P, the following similar law is established. do. When D is constant and only the speed changes, the similarity law is Q₂ = Q₁ * (N₂ / N₁), H₂ = H₁ * (N2 / N₁) ², P₂ = P₁ * (N₂ / N₁) ³, and Q (flow rate) is It is proportional to the rotational speed, P (the head) is proportional to the rotational speed change, and the power P is proportional to the cube of the rotational speed change. Subsequently, when the estimated power consumption of the cold water pump 14 or the hot water pump 16 is calculated using the law of similarity, the total energy saving cost is calculated using the operating time and the power unit cost for the application period of the cold / hot water reciprocating temperature difference control. .

Next, when there is no inverter in the cold water pump 14 or the hot water pump 16, the review item is estimated based on the total flow rate (m 2) and the total power consumption (kw) of the cold water pump 14 or the hot water pump 16. We examine consumption rate (%) and electricity use unit price (yuan / kwh). In addition, the operating hours for daily hours, monthly hours, annual hours, and hours are reviewed, and investment costs for inverter installation and other costs are reviewed. .

On the other hand, in general, when the inverter is installed in the pump for automatic control, the flow rate is reduced by 30-40%. When the inverter is not installed, if the cold water or hot water supply valve is shut off at the place of use, the flow rate is bypassed and there is no change in power.However, when the inverter is installed, the flow rate is reduced by detecting the pressure rise in the pipe by blocking the supply valve at the place of use. The power of the pump is reduced. On the other hand, the inverter is installed, but when the timing of the flow rate adjustment due to the pressure rise due to problems such as aging of the pipe is likely to rupture the pipe is used to fix the inverter frequency. Subsequently, when the estimated power consumption of the cold water pump 14 or the hot water pump 16 is calculated using the law of similarity, the total energy consumption cost is calculated using the operating time and power unit price for the application period of the cold / hot water reciprocating temperature difference control. . Inverter is installed, but if there is a possibility of pipe rupture due to late timing of flow rate adjustment due to problems such as aging of the pipe, fix the inverter frequency.

Building energy management according to an embodiment of the present invention is applicable to a building equipped with a flow control function of the cold water pump 14 or hot water pump 16. Through this, when the cold and hot water reciprocating temperature difference is less than a predetermined predetermined temperature, that is, when the excess flow rate, it is possible to reduce the energy consumption of the pump by adjusting the flow rate of the cold water pump 14 or hot water pump 16, the heat source of the building The device can be operated efficiently based on systematic data to reduce energy consumption. In addition, the energy management system of the building monitors the difference between the hot and cold water reciprocating temperature periodically or seasonally, and changes the flow rate of the pump within the range that satisfies the safety factor of the heat source equipment and the comfort of the indoor occupants. Efficiency can be optimized.

3 is a block diagram illustrating a configuration of an energy management apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the energy management apparatus 20 according to the embodiment of the present invention includes a control unit 21, a storage unit 22, and a communication unit 23.

The communication unit 23 performs a function for transmitting and receiving data through the facility control apparatus 30 and the communication network 40. Here, the communication unit 23 includes RF transmitting means for upconverting and amplifying the frequency of the transmitted signal, and RF receiving means for low noise amplifying and downconverting the received signal, and the like. The communication unit 23 may include at least one of a wireless communication module (not shown) and a wired communication module (not shown). The wireless communication module may include a wireless network communication module, a wireless local area network (WLAN), a wireless fidelity or WiMAX, a worldwide interoperability for microwave access (WLAN) communication module, and a wireless fan (WPAN) communication. It may include at least one of the modules.

The wireless communication module is a component for transmitting and receiving data according to a wireless communication method, and when the facility control apparatus 30 uses wireless communication, using any one of a wireless network communication module, a wireless LAN communication module, and a wireless fan communication module. Data may be transmitted to or received from the facility control device 30. On the other hand, the wired communication module is for transmitting and receiving data by wire. The wired communication module may be connected to the communication network 40 through a wire to transmit or receive data to the facility control apparatus 30.

In particular, the communication unit 23 according to an embodiment of the present invention communicates with the facility control device 30 to collect and transmit operation information for controlling the cold and hot water reciprocating temperature difference, the flow rate of the cold water pump 14 or hot water pump 16 Send a control signal for adjustment.

The communication unit 23 transmits and receives data by connecting to a computer device of a site technical supporter and a building manager connected for building energy management, and transmits and receives data with other terminal devices through various communication methods as well as wired and wireless methods. can do. Particularly, in the present invention, the communication unit 23 transmits the work instruction sheet and the changed work instruction sheet created by the control unit 21 to the computer device of the site technical supporter and the building manager, and remotely communicates with the facility control apparatus 30 to cool and heat. The original equipment can be controlled automatically.

The communication unit 23 receives a notification message for a cold / hot water reciprocating temperature difference, and receives information on energy saving result report review or additional work instruction generated from a computer device of a site technical supporter to save energy received information. Transfer to control unit 21 to register as an example of an item.

Meanwhile, the communication unit 23 may receive the indoor environment management data input through the screen as a message including the indoor environment management data standard document from the computer device of the building manager. In addition, the embodiment of the present invention has been described as having a communication unit 23 in the energy management device 20 to transmit and receive data to and from the communication unit 23 through a computer device of the building manager and site technical supporter, but the communication unit 23 Building managers and site technologists can enter information directly on the screen, instead of through it.

The storage unit 22 is a device for storing data, and includes a main memory device and an auxiliary memory device, and stores an application program necessary for the functional operation of the energy management device 20. The storage unit 22 may largely include a program area and a data area. Here, when the energy management device 20 activates each function in response to a user's request, the energy management device 20 executes corresponding application programs under the control of the controller 21 to provide each function. In particular, the program area according to an embodiment of the present invention is a program for analyzing the operation information of the cold and hot water generator 10 from the facility control device 30, a program for setting the hot water supply temperature through the information on the heat exchanger (17) , A program for comparing the cold / hot water reciprocating temperature difference measurement value with a predetermined cold / hot water reciprocating temperature difference reference value, a program for adjusting the flow rate of the cold water pump 14 or the hot water pump 16 to control the cold / hot water reciprocating temperature difference, and the cold water pump 14 or Stores a program for determining the energy reduction effect according to the flow rate adjustment of the hot water pump (16). In addition, the data area is an area in which data generated according to the use of the energy management device 20 is stored. In particular, in the data area according to an exemplary embodiment of the present invention, operation information of the cold / hot water generator 10 is stored. Here, the operation information is the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the cold water supply temperature of the cold and hot water generator 10, cold water return temperature, hot water supply temperature, hot water return Temperature and the opening rate of the coil valve of the air conditioner.

The controller 21 may be a process device that drives an operating system (OS) and each component. For example, the controller 21 may be a central processing unit (CPU). In particular, the control unit 21 according to an embodiment of the present invention performs the control of the cold and hot water reciprocating temperature difference based on the management data and the monitored operating information of the cold and hot water generator 10. Specifically, the control unit 21 analyzes the trends for the management data of the cold / hot water generator 10 on a daily, monthly, day of the week, quarterly, and semi-annual periods, to prevent cold water (CCD: Cooling Degree Day) and cold / hot water generator in the middle of the previous year. Check the energy consumption of (10) to determine the application period according to the control of the cold and hot water reciprocating temperature difference. Here, the items for analyzing the trend of daily, monthly, weekday, quarterly, and semi-annual management data are as shown in Table 1 below.

NO Item data
interval X-axis Y-axis Y´- axis Remarks Name Unit Name Unit Name Unit One CDD VS Hot and Cold Water Generator Energy Consumption year Outdoor
Temperature
(CCD) - Cold and hot water
Generator
energy
Consumption Kwh - - - 2 Cold and Hot Water Generator Load Rate VS COP January cold water
supply
Temperature ℃ cold water
Return temperature ℃ - - - 3 Cold and Hot Water Generator Load Rate VS COP January hot water
supply
Temperature ℃ hot water
Return temperature ℃ - - -

Here, the energy consumption of the cold and hot water generating device 10 is dependent on the variable of the external temperature, the cooling degree water (CDD: Cooling Degree Days) is the daily average temperature minus the predetermined temperature (18 ℃), the daily average temperature Can be calculated by dividing the maximum and minimum temperatures by two (maximum temperature + minimum temperature) / 2). In addition, the Heat Index Days (HDD) is a value obtained by subtracting a daily average temperature value obtained by dividing a maximum temperature and a minimum temperature by 2 by a preset temperature (18 ° C). And, if the day average temperature is 18 degrees or less, it is calculated as 0.

The control unit 21 monitors the heat exchanger type, facility status, aging degree, etc. of the cold / hot water generator 10, and sets the hot water supply temperature according to the monitored information.

The controller 21 may monitor real-time energy monitoring and period-by-period energy monitoring, equipment and control, and indoor environment or alarm. In particular, the control unit 21 monitors the indoor environment and the cold and hot water generator 10 through various sensors and measuring instruments installed in the cold heat source facility, that is, monitoring the main items set in real time in real time, according to the monitored hot and cold water reciprocating temperature difference. The flow rate of the cold water pump 14 or the hot water pump 16 for control is set.

In addition, the controller 21 provides a monitoring result of the cold / hot water generator 10 to which the energy saving method according to the work instruction is applied. Here, the operation information corresponding to the main items monitored in real time is the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the cold water supply temperature of the cold and hot water generator 10, cold water return Temperature, hot water supply temperature, hot water return temperature and the air conditioner coil valve opening rate, etc. In addition, it may further include other items required for cold and hot water reciprocating temperature difference control.

Looking at the main operation information, the control unit 21 checks the operating state of the cold and hot water generator 10. In addition, the controller 21 checks the air conditioner air supply and the ventilation temperature and humidity in order to confirm that there is no abnormality in the room temperature and humidity and the blowing air. In addition, the controller 21 checks the cold water supply temperature and the return temperature in order to confirm the reciprocating temperature difference between the cold water supply temperature and the return temperature of the cold / hot water generator 10 or to determine whether there is excess flow. In addition, the controller 21 confirms the reciprocating temperature difference between the hot water supply temperature and the return temperature of the cold / hot water generator 10 or checks the hot water supply temperature and the return temperature in order to determine whether there is excess flow. In addition, the control unit 21 confirms the coil valve opening rate of the air conditioner in order to confirm the power energy consumption pattern of the cold / hot water generator 10 before the cold / hot water reciprocating temperature difference control.

The controller 21 compares the cold / hot water reciprocating temperature difference based on the monitoring result of the operation information of the cold / hot water generator 10. Here, the controller 21 checks the difference between the cold water supply temperature and the return temperature of the cold / hot water generator 10 to calculate the cold water reciprocation temperature difference, or calculates the hot water reciprocation temperature difference by checking the difference between the hot water supply temperature and the return temperature. Thereafter, the controller 21 compares the calculated cold / hot water reciprocating temperature difference with a preset reference cold / hot water reciprocating temperature difference. As a result of the comparison, when the calculated cold / hot water reciprocating temperature difference is lower than the reference cold / hot water reciprocating temperature difference, the controller 21 changes the flow rate of the cold water pump 14 or the hot water pump 16. For example, the controller 21 sets the cold water reciprocating temperature difference to 5 ° C. as the cold water supply temperature of 7 ° C. and the cold water return temperature of 12 ° C. as the reference value for the optimum cold / hot water reciprocating temperature difference. Set the hot water reciprocating temperature difference to 5 ~ 10 ℃ by supply temperature 50 ~ 80 ℃ and hot water return temperature 45 ~ 70 ℃. That is, the cold water can maintain a constant supply temperature, but the hot water is changed according to the conditions of the equipment, heating method, heat exchanger 17, etc., it is difficult to maintain a constant supply temperature. At this time, when the current cold water reciprocating temperature difference is less than 5 ℃, the reference value of the cold water reciprocating temperature difference, the controller 21 determines that the cold water is excessively supplied and adjusts the flow rate of the cold water pump 14, and the hot water reciprocating temperature difference is the reference of the hot water reciprocating temperature difference. When it is less than 5-10 degreeC which is a value, it is judged that hot water excess supply is performed and the flow volume adjustment of the hot water pump 16 is performed.

The control unit 21 prepares a work instruction for adjusting the flow rate of the cold water pump 14 or the hot water pump 16 to control the cold / hot water reciprocating temperature difference, and transmits it to the site technician and the building manager, and the cold water pump 14 or the hot water pump ( Instruction 16 changes the flow rate. Accordingly, the building manager changes the flow rate of the cold water pump 14 or the hot water pump 16 by applying the cold / hot water reciprocating temperature difference control to the cold / hot water generator 10 according to the work instruction, and the cold water pump 14 or the hot water pump 16 The facility control device 30 is notified that the flow rate of) is changed.

At this time, the building manager checks the temperature difference by the air conditioner coil valve and whether the automatic valve is opened or closed before operating the pump discharge valve. For example, check the temperature difference between the hot and cold water by adjusting the valve by 5%. When the cold water reciprocating temperature difference reaches 5 ° C. which is a reference value, the flow rate adjustment of the cold water pump 14 is terminated. When the hot water reciprocating temperature difference reaches 5 to 10 ° C. that is the reference value, the flow rate adjustment of the hot water pump 16 is terminated. .

On the other hand, since the control unit 21 can directly control the hot and cold water generator 10 from a remote without sending a work instruction to the building manager, the cold water pump 14 or hot water pump 16 of the cold and hot water generator 10 directly. You can also change the flow rate.

The control unit 21 monitors the cold / hot water generator 10 after the flow rate of the cold water pump 14 or the hot water pump 16 is changed, analyzes the result information obtained through the monitoring, and analyzes the cold water pump 14 before or after implementation. Operating time of hot water pump 16, energy consumption of cold water pump 14 or hot water pump 16 before and after implementation, COP of cold / hot water generator 10, air supply and ventilation temperature of air conditioner, air supply and ventilation humidity of air conditioner, etc. Check the efficiency for energy calories accordingly.

The control unit 21 applies the energy saving method according to the created work instruction, that is, analyzes the monitoring result information of the cold / hot water generator 10 which is operated according to the changed flow rate of the cold water pump 14 or the hot water pump 16, and alarm If the alarm occurs in the cold heat source facility by checking whether or not it occurs, it is instructed to readjust the flow rate of the cold water pump 14 or the hot water pump 16. To this end, the control unit 21 applies the analyzed result information to create a changed work order, and delivers the changed work order to the site technical supporter and the building manager. For example, the alarm is generated to lower the supply temperature of the cold / hot water generator 10 because the indoor comfort cannot be guaranteed when the indoor humidity condition is not satisfied. In addition, since the cold and hot water generator 10 may be determined to be overloaded even when the indoor temperature conditions are not satisfied, the cold water supply temperature or the hot water supply temperature of the cold and hot water generator 10 should be lowered.

When the alarm does not occur, the controller 21 changes the flow rate of the cold water pump 14 or the hot water pump 16, and then checks the power decrease of the pump according to the change of the flow rate. Afterwards, the energy saving result report is prepared and managed by year, quarter, month, week, day and day.

The controller 21 transmits the generated energy saving result report to the site technical supporter. Accordingly, when the site technical supporter instructs the energy saving result report to review or additional work items, the controller 21 registers information on the review results or additional work items as examples of energy saving items.

The control unit 21 is changed to a flow rate capable of saving energy for power of the cold water pump 14 or the hot water pump 16, and continuously monitors the energy saving state based on the operation information of the cold / hot water generator 10.

In particular, the controller 21 predicts the first control value through a simulation based on mathematical modeling for the flow rate control of the cold water pump 14 or the hot water pump 16. Then, the controller 21 corrects the first control value for the flow rate control of the cold water pump 14 or the hot water pump 16 through the accumulated management data of the past to set the second control value. Subsequently, the controller 21 controls the cold water pump 14 or the hot water pump 16 from the second control value according to the operation information and the site situation obtained through real-time monitoring of the cold / hot water generator 10 after the second control value is applied. The final control value for the flow rate is set, and the cold / hot water generator 10 is controlled to the set final control value.

In addition, after the control unit 21 is changed to the set control value, the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the cold water supply temperature of the cold and hot water generator 10, cold water Monitor changes in return temperature, hot water supply temperature, hot water return temperature, and air conditioning coil valve opening rate. In addition, the controller 21 analyzes the energy efficiency before and after the change of the overall energy consumption of the cold / hot water generator 10 after controlling the flow rate of the cold water pump 14 or the hot water pump 16.

In addition, the energy management 20 according to an embodiment of the present invention performs a data input function and an output function for energy management of the building. In this case, the energy management device 20 preferably further includes an input unit (not shown) and an output unit (not shown). In particular, the input unit receives various information such as numeric and text information, and transmits a signal input in connection with setting various functions and controlling the function of the energy management device 20 to the controller 21. In addition, the input unit may include at least one of a keypad and a touch pad for generating an input signal according to a user's touch or manipulation. At this time, the input unit may be configured in the form of one touch panel (or touch screen) together with the display unit to simultaneously perform input and display functions. Further, the input unit may be any type of input means that can be developed in addition to an input device such as a keyboard, a keypad, a mouse, a joystick, and the like. In particular, the input unit according to the present invention receives a reference value for the hot and cold water reciprocating temperature difference through the screen displayed on the output unit from the building manager.

In addition, the output unit displays information on a series of operation states and operation results that occur during the performance of the energy management device 20. In addition, the output unit may display a menu of the energy management device 20 and user data input by the user. The output unit includes a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), organic light emitting diodes (OLED), a light emitting diode (LED), an active matrix organic LED (AMOLED), a flexible display, and It may be configured as a three-dimensional display (3 Dimension). The output also includes an audio function through a microphone or speaker. In particular, the output unit according to the present invention configures and displays the screen so that the building manager of the energy management device 20 can input the reference value for the cold and hot water reciprocating temperature difference, the operation information and the control unit of the monitored cold and hot water generator 10 The work instruction sheet and the changed work instruction sheet created in (21) can be displayed on the screen.

In addition, the energy management device 20 configured as described above may be implemented as one or more servers operating in a server-based computing-based method or a cloud method. In particular, data used for building energy management using a cloud computing device may be provided through a cloud computing function that may be permanently stored in a cloud computing device on the Internet. Here, cloud computing utilizes Internet technology in digital terminals such as desktops, tablet computers, laptops, netbooks and smart phones to provide virtualized IT (Information Technology) resources such as hardware (server, storage, (Database, security, web server, etc.), service, data, etc. on demand.

4 is a block diagram illustrating a configuration of a facility control apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the facility control apparatus 30 according to an exemplary embodiment of the present invention includes a control module 31, a storage module 32, and a communication module 33.

Facility control apparatus 30 according to an embodiment of the present invention is connected to the communication network 40 is a device for transmitting and receiving data for energy management of the energy management device 20 and the building.

The communication module 33 performs a function for transmitting and receiving data through the energy management device 20 and the communication network 40. Here, the communication module 33 includes RF transmitting means for up-converting and amplifying the frequency of the transmitted signal, and RF receiving means for low-noise-amplifying and down-converting the received signal. The communication module 33 may include at least one of a wireless communication module (not shown) and a wired communication module (not shown). The wireless communication module may include at least one of a wireless network communication module, a wireless LAN or Wi-Fi, a wireless fidelity or WiMAX communication module, and a wireless fan communication module.

The wireless communication module is a component for transmitting and receiving data according to a wireless communication method, and when the energy management apparatus 20 uses wireless communication, using any one of a wireless network communication module, a wireless LAN communication module, and a wireless fan communication module. Data may be transmitted and received with the energy management device 20. On the other hand, the wired communication module is for transmitting and receiving data by wire. The wired communication module may be connected to the communication network 40 through a wire to transmit and receive data with the energy management device 20.

In particular, the communication module 33 according to an embodiment of the present invention collects and transmits operation information for the cold / hot water generator 10 according to a request of the energy management device 20, and transmits the cold water pump 14 or the hot water pump 16. Receive the control signal for the flow rate change of).

The storage module 32 is a device for storing data, and includes a main memory device and an auxiliary memory device, and stores an application program required for the functional operation of the energy management device 20. The storage module 32 may largely include a program area and a data area. Here, when the energy management device 20 activates each function in response to a user's request, the energy management device 20 executes corresponding application programs under the control of the control module 31 to provide each function. In particular, the program area according to an embodiment of the present invention stores a program for collecting and monitoring the operation information of the cold and hot water generator 10, and a program for changing the flow rate of the cold water pump 14 or hot water pump (16).

In addition, the data area is an area in which data generated according to the use of the energy management device 20 is stored. In particular, the data area according to an embodiment of the present invention stores the operation information of the cold and hot water generator 10, a report recording the efficiency of the energy calories according to the flow rate change of the cold water pump 14 or hot water pump 16, and the like. do.

The control module 31 may be a process device for driving an operating system (OS) and each component. For example, the control module 31 may be a central processing unit (CPU). In particular, the control module 31 according to the embodiment of the present invention collects and provides operation information of the cold / hot water generator 10 according to the request of the energy management device 20.

If the control module 31 is requested to change the flow rate of the cold water pump 14 or the hot water pump 16 to adjust the cold and hot water reciprocating temperature difference from the energy management device 20, the flow rate of the cold water pump 14 or hot water pump 16 Adjust it. In addition, the control module 31 notifies the energy management device 20 of the efficiency of the pump power reduction according to the flow rate change of the cold water pump 14 or the hot water pump 16.

The control module 31 continuously monitors a plurality of monitoring items and transmits the monitored information to the energy management apparatus 20 in real time.

5 is a flowchart illustrating an operation of an energy management apparatus through cold water reciprocating temperature difference control according to an embodiment of the present invention.

Referring to FIG. 5, the energy management device 20 for controlling the cold water reciprocating temperature difference according to the present invention collects operation information of the cold / hot water generator 10 at a step S31 for a predetermined period of time. For example, the operation information may include the operation state of the cold / hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the cold water supply temperature of the cold / hot water generator 10, the cold water return temperature, and the coil valve of the air conditioner. It includes items such as opening rate. Here, the energy management device 20 checks the cold water (CDD) in the middle of the previous year. Cold-prevented water is obtained by subtracting the preset temperature from the daily average temperature value divided by the maximum temperature plus the minimum temperature, and calculating the value as 0 on the day when the average daily temperature is below the preset temperature. When the cold water is confirmed, the energy management device 20 checks the energy consumption of the cold and hot water generator 10, and determines the application period according to the flow rate change of the cold water pump 14 by applying the identified cold water and energy consumption. do. That is, the energy management device 20 predicts the first control value through simulation based on mathematical modeling for the flow rate control of the cold water pump 14. In addition, the energy management device 20 sets the second control value by correcting the first control value for the flow rate control of the cold water pump 14 through the accumulated management data.

The energy management device 20 monitors the cold water reciprocating temperature difference based on the operation information collected in step S33. The energy management device 20 compares the cold water reciprocating temperature difference based on the monitoring result. At this time, the energy management device 20 calculates the cold water reciprocating temperature difference by using the operation information monitored in real time, and compares the cold water reciprocating temperature difference calculated in step S35 and the predetermined reference cold water reciprocating temperature difference. As a result of the comparison, when the calculated cold water reciprocating temperature difference is lower than the reference cold water reciprocating temperature difference, the energy management device 20 requests to change the flow rate of the cold water pump 14 in step S37. Prior to this, after applying the set second control value, the energy management device 20 is the flow rate of the cold water pump 14 from the second control value according to the operation information and site conditions obtained through real-time monitoring of the cold and hot water generator 10. Set the final control value for, and controls the cold and hot water generator 10 to the set final control value. At this time, the energy management device 20 confirms the cold water reciprocating temperature difference while adjusting the flow rate of the cold water pump 14 at a predetermined unit interval.

The energy management device 20 checks the efficiency of energy calories according to the flow rate change of the cold water pump 14 in step S39. Here, the energy management device 20 monitors the cold and hot water generator 10 after the flow rate of the cold water pump 14 is changed, and analyzes the result information obtained through the monitoring, before and after the cold water pump operation time. The efficiency of energy calories according to one or more of cold water pump energy usage, COP of cold / hot water generator 10, air supply and ventilation temperature of the air conditioner, and air supply and ventilation humidity of the air conditioner is checked.

The energy management device 20 determines whether an alarm occurs due to abnormal operation of the cold / hot water generator 10 after the flow rate of the cold water pump 14 is changed in step S41. When the alarm occurs, the energy management device 20 requests the facility control device 30 in step S43 to readjust the flow rate change of the cold water pump 14. On the other hand, the energy management device 20 after changing the flow rate of the cold water pump 14 in step S45, and confirms the efficiency of the energy calorie according to the power reduction of the cold water pump 14 according to the flow rate change. At this time, the efficiency for energy calories are stored by classifying at least one of the yearly, quarterly, monthly, weekly, daily, day of the week. Thereafter, the energy management device 20 changes to a flow rate capable of saving energy for the power of the cold water pump 14, and continuously monitors the energy saving state based on the operation information of the cold / hot water generator 10.

In particular, after the energy management device 20 according to the present invention changes to a set control value, the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, cold and hot water generator 10 Monitoring of cold water supply temperature, cold water return temperature, hot water supply temperature, hot water return temperature and air conditioner coil valve opening rate. In addition, the energy management device 20 analyzes the energy efficiency before and after the change to the overall energy consumption of the cold and hot water generator 10, after controlling the flow rate of the cold water pump (14).

6 is a flowchart illustrating the operation of the energy management device through the control of the hot water reciprocating temperature difference according to an embodiment of the present invention.

Referring to FIG. 6, the energy management device 20 for controlling the hot water reciprocating temperature difference according to the present invention checks the state of the heat exchanger 17 in step S61. Here, the energy management device 20 monitors at least one of the heat exchanger type, facility status, aging degree of the cold and hot water generator 10, and sets the hot water supply temperature according to the monitored information.

The energy management device 20 collects operation information of the cold / hot water generator 10 at a step S63 for a predetermined period of time. For example, the operation information may include the operation state of the cold / hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the hot water supply temperature of the cold / hot water generator 10, the hot water return temperature, and the coil valve of the air conditioner. It includes items such as opening rate. Here, the energy management device 20 checks the heating index (HDD) of the middle of the previous year. The heating index is calculated by subtracting the daily average temperature value obtained by dividing the maximum temperature and the minimum temperature by 2 by the preset temperature (18 ° C), and calculating the value as 0 on the day when the average daily temperature is below the preset temperature. When the heating index is confirmed, the energy management device 20 checks the energy consumption of the cold / hot water generator 10 and determines the application period according to the change of the flow rate of the hot water pump 16 by applying the identified cold prevention water and energy consumption. do. That is, the energy management device 20 predicts the first control value through simulation based on mathematical modeling for the flow rate control of the hot water pump 16. In addition, the energy management device 20 sets the second control value by correcting the first control value for the flow rate control of the hot water pump 16 through the accumulated management data.

On the other hand, when the thermal efficiency decreases due to the aging of the heat exchanger 17 as a result of the monitoring of the heat exchanger 17, the control value is reset in consideration of this.

The energy management device 20 monitors the hot water reciprocating temperature difference based on the operation information collected in step S65. The energy management device 20 compares the hot water reciprocating temperature difference based on the monitoring result. At this time, the energy management device 20 calculates the hot water reciprocating temperature difference using the operation information monitored in real time, and compares the hot water reciprocating temperature difference calculated in step S67 and the preset reference hot water reciprocating temperature difference. As a result of the comparison, when the calculated hot water reciprocating temperature difference is lower than the reference hot water reciprocating temperature difference, the energy management device 20 requests to change the flow rate of the hot water pump 16 in step S69. That is, the energy management device 20 sets the final control value for the flow rate of the hot water pump 16 from the second control value according to the operation information and the site situation obtained through the real-time monitoring of the cold and hot water generator 10, and set Cold and hot water generator 10 is controlled to the final control value. At this time, the energy management device 20 checks the hot water reciprocating temperature difference while adjusting the flow rate of the hot water pump 16 at a predetermined unit interval.

The energy management device 20 checks the efficiency of energy calories according to the flow rate change of the hot water pump 14 in step S71. Here, the energy management device 20 monitors the cold and hot water generator 10 after the flow rate of the hot water pump 14 is changed, and analyzes the result information obtained through the monitoring, before and after the hot water pump operation time before and after the execution. Check the efficiency of energy heat according to at least one of hot water pump energy usage, COP of the cold and hot water generator 10, air supply and ventilation temperature of the air conditioner and air supply and ventilation humidity of the air conditioner.

The energy management device 20 determines whether an alarm occurs according to an abnormal operation of the cold / hot water generator 10 after the flow rate of the hot water pump 14 is changed in step S73. When the alarm occurs, the energy management device 20 requests the facility control device 30 in step S75 to readjust the flow rate change of the hot water pump 16. On the other hand, the energy management device 20 after changing the flow rate of the hot water pump 16 in step S77, and confirms the efficiency of the energy calorie according to the power reduction of the hot water pump 16 according to the flow rate change. At this time, the efficiency for energy calories are stored by classifying at least one of the yearly, quarterly, monthly, weekly, daily, day of the week. Thereafter, the energy management device 20 continuously changes the energy saving state based on the operation information of the cold / hot water generator 10 after changing to a flow rate capable of saving energy for power of the hot water pump 16.

In particular, after the energy management device 20 according to the present invention changes to a set control value, the operating state of the cold and hot water generator 10, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, cold and hot water generator 10 Monitoring of cold water supply temperature, cold water return temperature, hot water supply temperature, hot water return temperature and air conditioner coil valve opening rate. In addition, the energy management device 20 analyzes the energy efficiency before and after the change to the overall energy consumption of the cold and hot water generator 10, after controlling the flow rate of the hot water pump 16.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

The present invention aims to reduce the power of the pump power while maintaining a comfortable indoor environment by changing the flow rate of the pump through the control of the cold and hot water reciprocating temperature difference. Accordingly, when the cold and hot water reciprocating temperature difference is less than the predetermined predetermined temperature, that is, when the excess flow rate, the energy consumption of the pump can be reduced by adjusting the flow rate of the cold water pump or the hot water pump, and the heat source equipment of the building is based on systematic data. It can be operated efficiently to reduce energy consumption. This is not only a possibility of commercialization or sales, but also a possibility of being industrially applicable since it is practically possible to carry out clearly.

10: cold and hot water generator 20: energy management device 30: equipment control device
11a, 11b, 11c, 11d, 11e: thermometer 12a, 12b: flow meter
13: cold water coil 14: cold water pump 15: hot water coil
16: hot water pump 17: heat exchanger 21: control unit
22: storage unit 23: communication unit 31: control module
32: storage module 33: communication module 40: communication network
100: building energy management system

Claims (13)

A communication unit for collecting operation information on the cold / hot water generator and transmitting a signal for requesting a flow rate change of at least one of the cold water pump and the hot water pump;
A storage unit for storing management data for reviewing a cold heat source and a heating load pattern of the cold / hot water generator, data for changing a flow rate of at least one of a cold water pump and a hot water pump of the cold / hot water generator; And
Analyze the operation trend of the cold and hot water generator, set the application period of the cold and hot water reciprocating temperature difference control, and compare the operation information collected through the communication unit, the flow rate of the cold water pump or hot water pump according to the cold and hot water reciprocating temperature difference of the cold and hot water generator It is determined whether the control is applied, and when the flow rate control of the cold water pump or hot water pump is necessary, calculates the control value for the cold water pump or hot water pump, and requests that the cold and hot water generator is controlled based on the control value Control unit;
Energy management device through cold and hot water reciprocating temperature difference control, comprising a. The method of claim 1, wherein the driving information
At least one of the operating condition of the cold and hot water generator, the air supply and ventilation temperature of the air conditioner, the air supply and ventilation humidity of the air conditioner, the cold water supply temperature, the cold water return temperature, the hot water supply temperature, the hot water return temperature and the coil valve opening rate of the air conditioner Energy management device through cold and hot water reciprocating temperature difference control comprising a. The apparatus of claim 1, wherein the control unit
Check the energy consumption of the cold prevention water, heating index and the cold and hot water generator in the middle of the previous year, by applying the identified cold prevention water, heating index and energy consumption to determine the application period for changing the flow rate of the cold water pump Energy management device by controlling the cold and hot water reciprocating temperature difference. The apparatus of claim 1, wherein the control unit
The cold / hot water reciprocating temperature difference is calculated using real-time monitored driving information, and the calculated cold / hot water reciprocating temperature difference is compared with a preset reference cold / hot water reciprocating temperature difference, and when the calculated cold / hot water reciprocating temperature difference is lower than a reference cold / hot water reciprocating temperature difference, the Energy management device through cold and hot water reciprocating temperature difference control, characterized in that for changing the flow rate for at least one of the cold water pump or hot water pump. The apparatus of claim 1, wherein the control unit
Energy management device by controlling the hot and cold water reciprocating temperature difference, characterized in that for checking the cold and hot water reciprocating temperature difference while adjusting the flow rate for at least one of the cold water pump or hot water pump at a predetermined unit interval. The apparatus of claim 1, wherein the control unit
After the flow rate of at least one of the cold water pump or the hot water pump is changed, the cold and hot water generator is monitored and the result information obtained through the monitoring is analyzed to operate at least one of the cold water pump and the hot water pump before and after the execution. Energy consumption according to at least one of time, energy consumption of at least one of the cold water pump or the hot water pump before and after implementation, COP (Coefficient of performance) of the cold and hot water generator, air supply and ventilation temperature of the air conditioner and air supply and ventilation humidity of the air conditioner. Energy management device through cold and hot water reciprocating temperature difference control, characterized in that for checking the efficiency. The apparatus of claim 1, wherein the control unit
After the flow rate of at least one of the cold water pump or the hot water pump is changed, it is determined whether an alarm occurs according to an abnormal operation of the cold / hot water generator, and when the alarm occurs, at least one pump of the cold water pump or the hot water pump Energy management device through cold and hot water reciprocating temperature difference control, characterized in that for adjusting the flow rate for. The apparatus of claim 1, wherein the control unit
After changing the flow rate of at least one of the cold water pump or the hot water pump, the pump power decrease according to the change of the flow rate is confirmed, and the result is determined annually, quarterly, monthly, weekly, daily, weekly Energy management device through cold and hot water reciprocating temperature difference control, characterized in that stored in at least one. The apparatus of claim 1, wherein the control unit
The first control value is predicted through a simulation based on mathematical modeling for the flow rate control of the cold water pump or the hot water pump, and the first control value for the flow rate control of the cold water pump or the hot water pump through the accumulated management data. Set a second control value by correcting the value, and apply the final value of the flow rate of the cold water pump or the hot water pump from the second control value according to the operation information obtained through real time monitoring of the cold / hot water generator after the second control value is applied. The energy management device through the control of the cold and hot water reciprocating temperature difference, characterized in that for setting a control value, the control of the cold and hot water generator as the final control value. Setting an application period of cold / hot water reciprocating temperature difference control by analyzing an operation trend of the cold / hot water generator by the energy management device;
Comparing the operation information monitored by the energy management device to determine whether to apply flow rate control of the cold water pump or the hot water pump according to the cold / hot water reciprocating temperature difference of the cold / hot water generator;
Estimating, by the energy management device, a control value for the cold water pump or the hot water pump when flow rate control of the cold water pump or the hot water pump is necessary; And
Requesting, by the energy management device, the cold / hot water generator to be controlled based on the control value;
Energy management method through cold and hot water reciprocating temperature difference control comprising a. The method of claim 10,
Monitoring, by the energy management device, at least one of a heat exchanger type, a facility status, and an aging degree of the cold / hot water generator; And
Setting, by the energy management device, a hot water supply temperature according to the monitored information;
Energy management method through cold and hot water reciprocating temperature difference control, characterized in that it further comprises. The method of claim 10, wherein the calculating
Predicting, by the energy management device, a first control value through simulation based on mathematical modeling for controlling the flow rate of the cold water pump or the hot water pump;
Setting a second control value by correcting the first control value for the flow rate control of the cold water pump or the hot water pump through past management data accumulated by the energy management device;
Setting, by the energy management device, a final control value for the flow rate of the cold water pump or the hot water pump from the second control value according to the operation information obtained through real-time monitoring of the cold / hot water generator; And
Performing control of the cold / hot water generator by the energy management device to the final control value;
Energy management method through cold and hot water reciprocating temperature difference control comprising a. The method of claim 10, wherein the calculating
Confirming, by the energy management device, a monitoring result of a heat exchanger;
Resetting a control value in consideration of this, when the energy management device has a low thermal efficiency due to aging of the heat exchanger;
Energy management method through cold and hot water reciprocating temperature difference control, characterized in that it further comprises.

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