KR20130117117A - Device and method for controlling inlet temperature of cooling water in network operating center building energy management system - Google Patents
Device and method for controlling inlet temperature of cooling water in network operating center building energy management system Download PDFInfo
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- KR20130117117A KR20130117117A KR1020120039875A KR20120039875A KR20130117117A KR 20130117117 A KR20130117117 A KR 20130117117A KR 1020120039875 A KR1020120039875 A KR 1020120039875A KR 20120039875 A KR20120039875 A KR 20120039875A KR 20130117117 A KR20130117117 A KR 20130117117A
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- 239000000498 cooling water Substances 0.000 title claims abstract description 191
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 claims abstract description 67
- 239000002826 coolant Substances 0.000 claims abstract description 63
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000004088 simulation Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000005856 abnormality Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 238000007726 management method Methods 0.000 description 32
- 238000001816 cooling Methods 0.000 description 31
- 238000004891 communication Methods 0.000 description 14
- 238000005057 refrigeration Methods 0.000 description 7
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000012552 review Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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Abstract
The present invention relates to an apparatus and method for controlling temperature of cooling water supply in a building energy management system for improving energy use efficiency while maintaining a pleasant indoor environment of a building by changing a cooling water supply temperature of a building chiller. Check the coolant supply temperature lower limit of the freezer, analyze the trend of statistical data of the freezer system, and determine whether to change the coolant supply temperature of the freezer by using the coolant supply temperature lower limit and the coolant supply temperature measurement of the freezer. When the cooling water supply temperature of the refrigerator needs to be changed, after performing the control for changing the cooling water supply temperature of the refrigerator by using the real-time monitoring information obtained through monitoring by the monitoring unit and the analyzed statistical data, real-time monitoring Information By confirming the energy saving results by analyzing, there is an effect that can reduce the energy consumption by changing the cooling water supply temperature of the freezer even in the medium and light loads.
Description
The present invention relates to a building energy management system, and more particularly, to an apparatus and method for controlling temperature of a cooling water supply in a building energy management system for improving energy use efficiency while maintaining a pleasant indoor environment of a building by changing a cooling water supply temperature of a building freezer. It is about.
In Korea, which is highly dependent on the supply and demand of energy resources, the consumption of imported energy does not decrease even in the period of very high oil prices. In view of these circumstances, technology development and application of energy saving in the building sector is considered as a very important field among energy consumption fields.
Efficient use of energy in buildings is an important factor that has a direct impact on landlords and the national infrastructure industry.
In particular, unreasonable energy use in buildings is also associated with inefficient operation and management of the facilities in the building. For example, 20% of the summer's electricity demand is the share of cooling load in the building's total load, indicating that cooling load has a significant effect on peak power and power reserves. Occupies. Energy saving methods in such buildings include architectural planning approaches and facility approaches that improve the operating efficiency of energy-using devices and systems. Among these approaches, in the field of facilities, it is required to create a proper environment and to design energy consumption and environmental conservation and to operate an efficient facility system.
Accordingly, the present invention has been proposed to solve the conventional inconvenience, the cooling water supply temperature control device for changing the cooling water supply temperature to collect and analyze data on the condition of the refrigerator and cooling tower in the building remotely from the building energy management system And to provide a method.
Cooling water supply temperature control device in the building energy management system of the present invention for achieving the above object, the monitoring unit for monitoring the refrigerator system in real time; And analyzing trends of statistical data of the freezer system, determining whether the coolant supply temperature of the freezer is changed by using a preset coolant supply temperature lower limit value and a measured value of the coolant supply temperature of the freezer, and changing the coolant supply temperature of the freezer. Cooling water supply temperature control device in a building energy management system comprising a control unit for performing a control for changing the cooling water supply temperature of the refrigerator by using the real-time monitoring information and the analyzed statistical data obtained through monitoring in the monitoring unit .
In addition, the cooling water supply temperature control apparatus in the building energy management system of the present invention for achieving the above object, the cooling water supply temperature lower limit value, cooling water supply temperature measurement value, statistical data, the main monitoring items, monitoring information and cooling water supply The apparatus may further include a storage unit which stores one or more of information for temperature control.
In the cooling water supply temperature control apparatus in the building energy management system of the present invention, when an alarm occurs due to an abnormal operation of the refrigerator system, the controller performs control for changing the cooling water supply temperature of the refrigerator again.
In the cooling water supply temperature control apparatus in the building energy management system of the present invention, the control unit, after changing the cooling water supply temperature of the refrigerator, analyzes the monitoring information obtained by monitoring the refrigerator system to confirm the energy saving result.
In the cooling water supply temperature control apparatus in the building energy management system of the present invention, the control unit analyzes the trend of the statistical data, checks the past cold prevention water and the refrigerator power consumption, grasps the application period, and determines the trend of the statistical data for each period. Analyze and check for abnormalities in the freezer. Cold-prevented water is obtained by subtracting the preset temperature from the daily average temperature value obtained by adding the maximum temperature and the minimum temperature to 2, and calculating the value as 0 for the day when the average daily temperature is below the preset temperature.
In the cooling water supply temperature control apparatus in the building energy management system of the present invention, the control unit applies preset basic data of the refrigerator system to the simulation, derives the first control value through simulation according to environmental variables, and statistical data. The second control value is set by correcting the first control value using, and after changing the cooling water supply temperature of the freezer to the set second control value, the second control value according to the monitoring information obtained through real-time monitoring of the refrigerator system. The final control value is set by correcting and the control for changing the cooling water supply temperature of the refrigerator is performed.
In the cooling water supply temperature control device in the building energy management system of the present invention, the control unit compares the cooling water supply temperature measurement value with the cooling water supply temperature lower limit value of the refrigerator, and when the cooling water supply temperature measurement value is larger than the cooling water supply temperature lower limit value, the cooling water is used. Change the supply temperature.
Cooling water supply temperature control method in the building energy management system of the present invention for achieving the above object, the step of checking the lower limit of the cooling water supply temperature of the pre-set refrigerator; Monitoring the freezer system in real time; Analyzing the trend of statistical data of the freezer system; Comparing the coolant supply temperature lower limit value and the coolant supply temperature measurement value to determine whether the coolant supply temperature is changed in the freezer, and when the coolant supply temperature of the freezer is required to be changed, the cooling water supply temperature of the freezer using the monitoring information and analyzed statistical data. Performing control to change the.
In addition, the cooling water supply temperature control method in the building energy management system of the present invention for achieving the above object, the step of checking whether the alarm occurs according to the abnormal operation of the refrigerator system; And when the alarm occurs, performing control for changing the coolant supply temperature of the refrigerator again.
Cooling water supply temperature control method in the building energy management system of the present invention for achieving the above object, the step of confirming the energy saving results by analyzing the monitoring information obtained by monitoring the refrigeration system after the cooling water supply temperature of the refrigerator is changed; It further includes.
In the method for changing the coolant supply temperature lower limit in the building energy management system of the present invention, analyzing the trend of the statistical data of the freezer includes: identifying past cold water; Identifying a freezer power consumption; And identifying the application period of the control for changing the cooling water supply temperature by applying the identified cold prevention water and the freezer power consumption.
In the method of controlling the cooling water supply temperature in the building energy management system of the present invention, the performing of the control for changing the cooling water supply temperature of the refrigerator includes applying preset basic data of the refrigerator system to the simulation and performing simulation according to environmental variables. Deriving a first control value through; Correcting the first control value using statistical data to set a second control value; Changing the cold water supply temperature of the freezer to the set second control value; Correcting the second control value according to the monitoring information obtained through real-time monitoring of the refrigerator system to set a final control value and performing control for changing the coolant supply temperature of the refrigerator to the final control value.
The present invention can reduce the power consumption of the refrigerator by improving the efficiency of the refrigerator by lowering the setting of the cooling water supply temperature, it is possible to reduce the energy consumption by operating the refrigerator system efficiently.
In addition, the present invention can improve the efficiency of the refrigerator by lowering the cooling water supply temperature when the cooling load is light load or cooling is required even in the winter or mid-term, thereby saving energy.
1 is a block diagram showing the structure of a general refrigerator system.
2 is a block diagram illustrating a structure of a cooling water supply temperature control device of a refrigerator in a building energy management system according to an exemplary embodiment of the present invention.
3 is a flowchart illustrating a method for controlling a cooling water supply temperature of a refrigerator in a building energy management system according to an exemplary 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.
Prior to the explanation, the Network Operating Center Building Energy Management System (NOC BEMS) is a system for improving energy performance while maintaining a pleasant indoor environment in a building. In addition, it analyzes energy usage and analyzes environment variables according to time zones and provides energy saving services to save building energy.
Hereinafter, an embodiment of the present invention will be described an apparatus and method for controlling the cooling water supply temperature of the refrigerator while monitoring and automatically controlling the operating state of the refrigerator system among various equipment systems in the building in the building energy management system.
First, referring to FIG. 1 attached to the refrigerator system, the
In addition, the building energy management system monitors the operating state of the
On the other hand, prior to the cooling water supply temperature control, the manager examines the cooling water lower limit temperature management index of the
Next, a structure of a cooling water supply temperature control device in a building energy management system for controlling a cooling water supply temperature of a refrigerator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, the cooling water supply temperature control according to the embodiment of the present invention can be applied regardless of the refrigerator manufacturer, it should be noted that the set value of the cooling water supply temperature may be different depending on the type and the manufacturer of the refrigerator.
2 is a block diagram illustrating a structure of a cooling water supply temperature control device of a refrigerator in a building energy management system according to an exemplary embodiment of the present invention.
Referring to FIG. 2, the cooling water supply
The input unit 110 receives a coolant supply temperature lower limit value of the
The
In these main items, the cold water supply temperature and the cold water return temperature are items for checking the range of the cold water supply temperature and the cold water return temperature, and confirming whether a temperature difference value ΔT between the cold water supply temperature and the cold water return temperature is obtained. Cold water flow rate is an item that determines whether cold water maintains a constant flow rate. Refrigerator power consumption is an item to check the energy consumption before and after the cooling water supply temperature control compared to the power consumption of the refrigerator, cooling tower, cooling water pump and cold water pump. Cooling water supply temperature is an item for confirming the cooling water supply temperature lower limit. Cooling water return temperature is an item to check whether the cooling water supply temperature and the temperature difference value is secured. The cooling water flow rate is an item for confirming the change in power consumption of the cooling water pump and for checking the cooling load.
The
Specifically, the
Value
(CCD)
The
The
In order to control the cooling water supply temperature change, specifically, the
Accordingly, the
On the other hand, even if the
The
The
The
The
In addition, the
Meanwhile, in the exemplary embodiment of the present invention, the cooling water supply
The
Next, a method for controlling the cooling water supply temperature of the refrigerator in the cooling water supply temperature control apparatus of the building energy management system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
The cooling water supply
3 is a flowchart illustrating a method for controlling a cooling water supply temperature of a refrigerator in a building energy management system according to an exemplary embodiment of the present invention.
Referring to FIG. 3, in
In
Accordingly, the cooling water supply
In detail, in
As a result of the comparison, when the measured value of the coolant supply temperature is larger than the lower limit of the coolant supply temperature, in
Specifically, the cooling water supply
Accordingly, the cooling water supply
Thereafter, if necessary in
After changing the coolant supply temperature of the freezer, in
As a result of the check, if an alarm occurs, the process proceeds to step 1104 and the cooling water supply
On the other hand, if the alarm does not occur during the set period, the cooling water supply
On the other hand, the cooling water supply
Specifically, the cooling water supply
In addition, the cooling water supply
Finally, the cooling water supply
Such energy savings confirmation can also be confirmed by the manager through an energy saving report.
In order to accurately compare energy savings, it may be necessary to select a period of time similar to the ambient temperature / humidity and air conditioning load, cooling water supply / return temperature, other than the cooling water supply temperature setpoint.
By analyzing the energy saving effect through the monitoring result information as described above, it is possible to know the change in the power consumption of the refrigerator according to the change in the coolant inlet temperature of the freezer.
By changing the cooling water supply temperature according to an embodiment of the present invention, the load of the refrigerator can be reduced to reduce the power consumption of the refrigerator.
The method for controlling the cooling water supply temperature of the refrigerator according to the present invention may be implemented in software form readable by various computer means and recorded on a computer readable recording medium. Here, the recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions recorded on the recording medium may be those specially designed and constructed for the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. For example, the recording medium may be an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM), a digital video disk (DVD) Includes a hardware device that is specially configured to store and execute program instructions such as a magneto-optical medium such as a floppy disk and a ROM, a random access memory (RAM), a flash memory, do. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art. In addition, although specific terms are used in the specification and the drawings, they are only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention, and are not intended to limit the scope of the present invention.
The present invention relates to an apparatus and a method for controlling a cooling water supply temperature in a building energy management system, and by reducing the setting of the cooling water supply temperature, it is possible to reduce the load of the refrigerator to reduce the consumption of the refrigerator and to operate the refrigerator system efficiently. This has the effect of reducing the energy consumption, so there is industrial applicability.
In addition, the present invention can improve the efficiency of the freezer by lowering the cooling water supply temperature when the cooling load is light load or when cooling is required even in the winter or mid-term, and thus there is an energy saving effect, so there is industrial applicability.
10: freezer system 11: freezer
100: cooling water supply temperature control device
110: input unit 120: monitoring unit
130: control unit 140: output unit
150: communication unit 160: storage unit
Claims (13)
Analyze the trend of statistical data of the refrigerator system, determine whether to change the cooling water supply temperature of the refrigerator by using a predetermined cooling water supply temperature lower limit value and the cooling water supply temperature measurement value of the refrigerator, and when the cooling water supply temperature of the refrigerator is required to be changed. And a controller configured to change the cooling water supply temperature of the refrigerator by using the real-time monitoring information obtained through monitoring by the monitoring unit and the analyzed statistical data;
Cooling water supply temperature control device in a building energy management system comprising a.
And a storage unit storing one or more of the coolant supply temperature lower limit value, the coolant supply temperature measurement value, the statistical data, the main monitoring items, the monitoring information, and the information for controlling the coolant supply temperature. Cooling water supply temperature control device in energy management system.
Cooling water supply temperature control device in the building energy management system, characterized in that if the alarm occurs according to the abnormal operation of the refrigerator system, the control for changing the cooling water supply temperature of the refrigerator again.
Cooling water supply temperature control device in the building energy management system, characterized in that after the cooling water supply temperature of the refrigerator is changed, the energy saving result is confirmed according to the analysis result by analyzing the monitoring information obtained by monitoring the refrigerator system.
Analyze the trend of the statistical data to determine the application period by identifying the cold water and the power consumption of the refrigerator in the past, by analyzing the trend of the statistical data for each period to check whether there is an abnormality of the refrigerator system Cooling water supply temperature control device in the management system.
The cold protection water is a value obtained by subtracting a preset temperature from a daily average temperature value obtained by dividing a maximum temperature and a minimum temperature by 2, and building energy management, wherein the day average temperature is less than a preset temperature. Cooling water supply temperature control system in the system.
Apply preset basic data of the refrigerator system to a simulation, derive a first control value through simulation according to an environmental variable, correct the first control value using the statistical data, and set a second control value; After changing the coolant supply temperature of the refrigerator to the set second control value, the final control value is set by correcting the second control value according to the monitoring information obtained through real-time monitoring of the refrigerator system, and setting the final control value to the set final control value. Cooling water supply temperature control device in a building energy management system, characterized in that for performing control for changing the cooling water supply temperature of the refrigerator.
In the building energy management system, the cooling water supply temperature is changed when the cooling water supply temperature measurement value is greater than the cooling water supply temperature lower limit value by comparing the cooling water supply temperature measurement value with the cooling water supply temperature lower limit value of the refrigerator. Cooling water supply temperature control device.
Monitoring the freezer system in real time;
Analyzing a trend of statistical data of the freezer system;
Comparing the coolant supply temperature lower limit value and the coolant supply temperature measurement value to determine whether the coolant supply temperature of the refrigerator is changed; And
If it is necessary to change the cooling water supply temperature of the refrigerator, performing control for changing the cooling water supply temperature of the refrigerator using monitoring information and the analyzed statistical data; Cooling water supply temperature control method in a building energy management system comprising a.
Checking whether an alarm occurs according to an abnormal operation of the refrigerator system; And
If an alarm occurs, performing control for changing the coolant supply temperature of the refrigerator again;
Cooling water supply temperature control method in a building energy management system characterized in that it further comprises.
Confirming an energy saving result by analyzing monitoring information obtained by monitoring the refrigerator system after the cooling water supply temperature of the refrigerator is changed;
Cooling water supply temperature control method in a building energy management system characterized in that it further comprises.
Identifying past cold water;
Identifying a freezer power consumption; And
Determining the application period of the control for changing the cooling water supply temperature by applying the identified cold prevention water and the refrigerator power consumption;
Cooling water supply temperature control method in a building energy management system comprising a.
Applying preset basic data of the refrigerator system to a simulation and deriving a first control value through simulation according to an environmental variable;
Correcting a first control value using the statistical data to set a second control value;
Changing a cold water supply temperature of the refrigerator to a set second control value;
Setting a final control value by correcting the second control value according to monitoring information obtained through real-time monitoring of the refrigerator system; And
Performing control for changing the coolant supply temperature of the refrigerator to the final control value;
Cooling water supply temperature control method in a building energy management system comprising a.
Priority Applications (1)
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KR1020120039875A KR20130117117A (en) | 2012-04-17 | 2012-04-17 | Device and method for controlling inlet temperature of cooling water in network operating center building energy management system |
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KR1020120039875A KR20130117117A (en) | 2012-04-17 | 2012-04-17 | Device and method for controlling inlet temperature of cooling water in network operating center building energy management system |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112082292A (en) * | 2020-08-28 | 2020-12-15 | 北京京仪自动化装备技术有限公司 | Refrigeration system |
CN112567187A (en) * | 2018-09-13 | 2021-03-26 | 三菱重工制冷空调***株式会社 | Control device, heat source system, method for calculating lower limit value of cooling water inlet temperature, control method, and program |
KR102325379B1 (en) | 2021-04-14 | 2021-11-10 | 경상국립대학교산학협력단 | Operation Control Method for High Temperature Difference and Low Condenser Water Temperature on Cooling Towers |
-
2012
- 2012-04-17 KR KR1020120039875A patent/KR20130117117A/en not_active Application Discontinuation
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112567187A (en) * | 2018-09-13 | 2021-03-26 | 三菱重工制冷空调***株式会社 | Control device, heat source system, method for calculating lower limit value of cooling water inlet temperature, control method, and program |
CN112567187B (en) * | 2018-09-13 | 2022-06-03 | 三菱重工制冷空调***株式会社 | Control device, heat source system, method for calculating lower limit value of cooling water inlet temperature, control method, and recording medium |
US11713900B2 (en) | 2018-09-13 | 2023-08-01 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Control device, heat source system, method for calculating lower limit of cooling water inlet temperature, control method, and program |
CN112082292A (en) * | 2020-08-28 | 2020-12-15 | 北京京仪自动化装备技术有限公司 | Refrigeration system |
CN112082292B (en) * | 2020-08-28 | 2022-03-22 | 北京京仪自动化装备技术有限公司 | Refrigeration system |
KR102325379B1 (en) | 2021-04-14 | 2021-11-10 | 경상국립대학교산학협력단 | Operation Control Method for High Temperature Difference and Low Condenser Water Temperature on Cooling Towers |
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