CN112728723A - Method for monitoring and analyzing operation energy efficiency of refrigeration machine room by intelligent group control system - Google Patents
Method for monitoring and analyzing operation energy efficiency of refrigeration machine room by intelligent group control system Download PDFInfo
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- CN112728723A CN112728723A CN202110077353.1A CN202110077353A CN112728723A CN 112728723 A CN112728723 A CN 112728723A CN 202110077353 A CN202110077353 A CN 202110077353A CN 112728723 A CN112728723 A CN 112728723A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention discloses a method for monitoring and analyzing the operation energy efficiency of a refrigeration machine room by an intelligent group control system, which belongs to the technical field of refrigeration machine room construction and comprises the following steps: the invention relates to a design technology line, machine room equipment installation, accurate measuring instrument installation, intelligent control system installation, group control system debugging and operation and maintenance management.
Description
Technical Field
The invention relates to the technical field of refrigeration machine room construction, in particular to a method for monitoring and analyzing the operation energy efficiency of a refrigeration machine room by an intelligent group control system.
Background
With the continuous forward development of national economy in China, more and more commercial buildings appear in city construction. The quality of the heating, ventilating and air conditioning engineering design serving as an important component of modern building design often reflects a series of technical problems to a great extent, such as selection of system schemes, selection of equipment, application of new technologies and the like. When designing and making decisions, the advanced performance, the practicability and the economical efficiency of the system need to be analyzed and compared, and meanwhile, the operation management and the economic benefit when the system is put into use after being built need to be analyzed and compared.
The general improvement of the society's requirement for artificial environment, the more and more attention is paid to the construction development of heating, ventilating and air conditioning system, which makes the design decision of the large-scale construction project which originally appears to be complex and heavy more important. Such a large air conditioning system for a single building not only needs to input a large amount of human resources if the operation is controlled by manpower, but also generates a large amount of power waste due to the difficulty in accurately controlling the operation of equipment, thereby increasing the operation cost. Therefore, the problem can be solved fundamentally only by adopting an advanced intelligent control technology.
The prior art is not enough to attach importance to the operation energy efficiency of the refrigeration machine rooms, most of the refrigeration machine rooms are not provided with an energy efficiency monitoring system or a small part of the refrigeration machine rooms are provided with the energy efficiency monitoring system, but the accuracy of data generally cannot meet the requirement, more electric power is consumed, and a large amount of manpower is required to be input in the later period to carry out operation and maintenance management, so that the operation and maintenance management is troublesome. Aiming at the defects, the technology is characterized in that by designing an implementation scheme, equipment and an accurate instrument device are installed in a refrigerating room system to monitor and analyze the operation energy efficiency, an accurate intelligent control system is established, and after debugging, group control system operation and later-stage operation and maintenance management are carried out.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a method for monitoring and analyzing the running energy efficiency of a refrigerating machine room by an intelligent group control system, the method is simple and convenient in process operation, equipment and an accurate instrument device are installed in the refrigerating machine room system to monitor and analyze the running energy efficiency, the accurate intelligent control system is established, and after debugging, group control system operation and later-stage operation and maintenance management are carried out, so that the problems that the running energy efficiency of the refrigerating machine room is lack of monitoring in a building, the power consumption is high, and the later-stage operation and maintenance management is troublesome can be effectively solved.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
a method for monitoring and analyzing the operation energy efficiency of a refrigeration machine room by an intelligent group control system comprises the following steps:
s1, designing a technical circuit: the method comprises the following steps of selecting types of equipment in a machine room, optimizing and installing the equipment, installing an accurate measuring instrument and establishing an intelligent control system; through the internet, the intelligent control system is in data intercommunication with the energy management platform, is in seamless connection, is expanded with functional modules, is displayed on multiple platforms, and can remotely monitor data at a remote client at any time and any place;
s2, machine room equipment installation: installing various machine room devices according to actual working requirements;
s3, mounting the accurate measuring instrument: the selection and installation of the accurate measuring instrument need to meet the design standard, the monitored data is accurate and reliable, the information of the monitored data (energy efficiency, cold quantity and the like) of the accurate energy efficiency system is stored and displayed on a system control platform, a worker analyzes whether the monitored data reaches the performance index or not, a decision is made according to the performance index, the optimal system overall control scheme is searched through historical monitoring data, and the control is carried out according to the formulated control strategy (system strategy and equipment strategy);
s4, installing an intelligent control system: installing intelligent control equipment, optimizing a starting-up strategy, compiling actual operation strategy logic of the equipment, accurately measuring system function and interface customized design and development, intelligently controlling system function and interface customized design and development, intelligently managing report customized design and development of an intelligent system, storing intelligent system data and designing and developing a cloud service function;
s5, debugging the group control system: a system debugging plan of a refrigeration machine room is formulated, and the data acquisition period is 2 weeks, so that the target energy efficiency of the system is achieved;
s6, operation and maintenance management: compiling an operation introduction manual of an intelligent control system of the efficient air conditioning system, training the operation and technology of the intelligent control system for management personnel, and providing an emergency service scheme for maintenance.
In a preferred embodiment of the present invention, the equipment room in S2 includes a chiller, a cooling tower, a water pump, and an end air conditioner.
As a preferred scheme of the present invention, the precise measurement instrument in S3 includes a precise intelligent gateway, a precise cold quantity measurement unit, a flow sensor, a temperature sensor, a digital electric meter, and the like, and the precise intelligent gateway has the configuration characteristics that: the maximum 24-bit resolution is that data recording is within 1 minute interval; the configuration characteristics of accurate cold volume measurement unit: the highest temperature precision is +/-0.03 ℃, and the lowest flow precision is +/-0.05%; the flow sensor has the configuration characteristics that: inserting ultrasonic waves, wherein the accuracy grade is 1 grade, and the pipe diameter range is 50 mm-1200 mm; the configuration characteristics of the temperature sensor are as follows: the precision is +/-0.03 ℃, the temperature range is 0-50 ℃, and a certificate is provided; the configuration characteristics of the digital electric meter are as follows: the accuracy is + -0.5%.
As a preferred scheme of the present invention, the intelligent control system in S4 operates the water chilling unit, the refrigeration pump, the cooling pump, and the electric valves of the cooling tower and the related equipment, and sets the control strategy and the control logic.
As a preferred scheme of the invention, the intelligent control system comprises a database server, a data acquisition, processing and publishing server, an application server, a disk display, a switch, a router and a firewall, and is externally connected with a remote client and an energy efficiency workstation through the Internet, wherein the remote client comprises a mobile phone, a computer and a pad.
As a preferred solution of the present invention, the debugging of the group control system in S5 includes pre-debugging checking, system stand-alone debugging, system on-load debugging, intelligent control system operation debugging, and preliminary acceptance.
As a preferred aspect of the present invention, the operation and maintenance management in S6 can ensure that the refrigeration machine room group control system operates efficiently through the following aspects:
(1) the efficient air conditioning system machine room part is scheduled for return visit on site;
(2) optimizing control logic according to the building industry;
(3) analyzing energy efficiency by remote online monitoring data;
(4) the expert diagnoses the energy consumption of the air conditioning system on line to ensure the energy efficiency target;
(5) and performing on-site return visit (not less than 4 times/year), recording and warehousing the system operation rules, performing coordinated management, and predicting energy efficiency.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
the intelligent group control system has the advantages that the technical process is simple to operate and wide in application, the running state of system equipment, the cold output and recovery condition and the energy and efficiency tracking condition can be displayed in real time by using the accurate monitoring instrument, the optimal performance requirement is met by adjusting, the humanized and visualized intelligent group control system interface is convenient for operation and maintenance personnel to monitor and make decisions, the later-stage running cost is greatly reduced, and the power consumption is saved. The expansion of the function module is carried out, the intelligent control system and the energy management platform are in data intercommunication and seamless connection, and meanwhile, data can be remotely monitored in a remote client at any time and any place, so that the practicability is high.
Drawings
FIG. 1 is a construction roadmap for the present invention;
FIG. 2 is a system control diagram of the present invention;
fig. 3 is a flow chart of the operation of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Example (b):
referring to fig. 1-3, a method for monitoring and analyzing the operation energy efficiency of a refrigeration machine room by an intelligent group control system includes the following steps:
s1, designing a technical circuit: the method comprises the following steps of selecting types of equipment in a machine room, optimizing and installing the equipment, installing an accurate measuring instrument and establishing an intelligent control system; through the internet, the intelligent control system is in data intercommunication with the energy management platform, is in seamless connection, is expanded with functional modules, is displayed on multiple platforms, and can remotely monitor data at a remote client at any time and any place;
s2, machine room equipment installation: installing various machine room devices according to actual working requirements;
s3, mounting the accurate measuring instrument: the selection and installation of the accurate measuring instrument need to meet the design standard, the monitored data is accurate and reliable, the information of the monitored data (energy efficiency, cold quantity and the like) of the accurate energy efficiency system is stored and displayed on a system control platform, a worker analyzes whether the monitored data reaches the performance index or not, a decision is made according to the performance index, the optimal system overall control scheme is searched through historical monitoring data, and the control is carried out according to the formulated control strategy (system strategy and equipment strategy);
s4, installing an intelligent control system: installing intelligent control equipment, optimizing a starting-up strategy, compiling actual operation strategy logic of the equipment, accurately measuring system function and interface customized design and development, intelligently controlling system function and interface customized design and development, intelligently managing report customized design and development of an intelligent system, storing intelligent system data and designing and developing a cloud service function;
s5, debugging the group control system: a system debugging plan of a refrigeration machine room is formulated, and the data acquisition period is 2 weeks, so that the target energy efficiency of the system is achieved;
s6, operation and maintenance management: compiling an operation introduction manual of an intelligent control system of the efficient air conditioning system, training the operation and technology of the intelligent control system for management personnel, and providing an emergency service scheme for maintenance.
Specifically, the equipment in the machine room in S2 includes a water chiller, a cooling tower, a water pump and a terminal air conditioner.
Specifically, the accurate measuring instrument in S3 includes instruments such as high-accuracy intelligent gateway, accurate cold volume measurement unit, flow sensor, temperature sensor and digital ammeter, and high-accuracy intelligent gateway' S configuration characteristics: the maximum 24-bit resolution is that data recording is within 1 minute interval; the configuration characteristics of accurate cold volume measurement unit: the highest temperature precision is +/-0.03 ℃, and the lowest flow precision is +/-0.05%; the flow sensor has the configuration characteristics that: inserting ultrasonic waves, wherein the accuracy grade is 1 grade, and the pipe diameter range is 50 mm-1200 mm; the configuration characteristics of the temperature sensor are as follows: the precision is +/-0.03 ℃, the temperature range is 0-50 ℃, and a certificate is provided; the configuration characteristics of the digital electric meter are as follows: the accuracy is + -0.5%.
Specifically, the intelligent control system in S4 operates the water chiller, the refrigeration pump, the cooling pump, and the electrically operated valves of the cooling tower and the equipment, and sets the control strategy and the control logic.
Specifically, the intelligent control system comprises a database server, a data acquisition, processing and publishing server, an application server, a disk display, a switch, a router and a firewall, and is externally connected with a remote client and an energy efficiency workstation through the Internet, wherein the remote client comprises a mobile phone, a computer and a pad.
Specifically, the debugging of the group control system in S5 includes pre-debugging inspection, system stand-alone debugging, system on-load debugging, intelligent control system operation debugging, and preliminary acceptance.
The information of monitoring data (energy efficiency, cold capacity and the like) of the accurate energy efficiency system is collected and transmitted in real time and is displayed on a system control interface, a worker analyzes whether the information reaches a performance index or not, a decision is made accordingly, the overall control of the system is optimized, and the operation and the control are carried out according to a set control strategy (a system strategy and an equipment strategy). The intelligent group control system is controlled and optimized, modeling is carried out according to accurate cooling capacity measurement and historical operation data, an optimal starting matching mode is selected through actual load, the system operation efficiency is optimized, the system energy efficiency is optimized, and meanwhile, control strategies of all devices are formulated;
and (3) a cold machine control strategy: based on accurate load measurement, automatically adding and subtracting the machine according to a demand cold machine, controlling by a time program, and adjusting according to the set water supply temperature to ensure that the system automatically maintains the stability of the pressure of a water system; the start and stop of the equipment and the valve of the water pump are controlled in a linkage manner, so that the pipeline in the cold machine is prevented from being frozen and the like; when the equipment is in a starting failure, the standby equipment is automatically put into use;
a freeze pump control strategy: on the premise of ensuring the comfort level of a machine room, a water pump sends chilled water to the tail end with the minimum energy consumption, and the minimum motor rotating speed, the normal system pressure, the minimum water flow speed for preventing cold machine tripping and the maintenance of turbulent flow are ensured by combining three methods of system pressure frequency conversion, temperature difference frequency conversion (control by return water temperature when just opened) and position frequency conversion of an adjusting valve according to cold load frequency conversion regulation to prevent a cold machine from freezing;
cooling pump control strategy: on the premise of not influencing the efficiency of the cold station, the water pump is enabled to convey cooling water with the minimum energy consumption, the cooling water outlet temperature of the cold machine is adjusted according to the frequency conversion of the cold load, the method of frequency conversion according to the temperature difference and the method of frequency conversion of the cold energy of the cold machine are combined, the minimum motor rotating speed, the cold machine cannot surge, the minimum flow rate can prevent the cold machine from tripping and the minimum water pressure for the cooling tower can be maintained;
cooling tower control strategy: under the cold quick-witted heat dissipation circumstances of assurance, let cooling tower and cold quick-witted power consumption reach the minimum, according to cold load frequency conversion regulation, control logic: the running frequency of a fan of the cooling tower is controlled according to the inlet water temperature of cooling water of the main machine, the control is combined according to outdoor meteorological parameters and a method according to cold quantity, the minimum motor rotating speed is guaranteed, the inlet water temperature setting range of the main machine is adjusted, and the surging of a cold machine is prevented.
Specifically, the operation and maintenance management in S6 can ensure that the refrigeration equipment room group control system operates efficiently through the following aspects:
(1) the efficient air conditioning system machine room part is scheduled for return visit on site;
(2) optimizing control logic according to the building industry;
(3) analyzing energy efficiency by remote online monitoring data;
(4) the expert diagnoses the energy consumption of the air conditioning system on line to ensure the energy efficiency target;
(5) and performing on-site return visit (not less than 4 times/year), recording and warehousing the system operation rules, performing coordinated management, and predicting energy efficiency.
In the embodiment, an accurate measuring instrument monitoring system is adopted for energy efficiency and real-time data acquisition and transmission, the running state and cold output and recovery conditions of the system equipment and energy and efficiency conditions are displayed in real time on an interface, an intelligent group control system is established, a starting strategy is optimized, a water chilling unit, a freezing pump, a cooling tower and electric valves related to the equipment can be operated and controlled on the interface, a control strategy and control logic are set, meanwhile, operation and maintenance personnel monitoring and decision are carried out after the optimal strategy or set value is adjusted to the optimal strategy or set value through system debugging, the refrigeration machine room system is ensured to reach performance running indexes, the power consumption cost is reduced, and the later operation and maintenance management is simplified. The function module is expanded, is connected with the Internet, shares data, and can remotely monitor in real time in a plurality of platforms such as a mobile phone end, a computer, a pad and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (7)
1. A method for monitoring and analyzing the operation energy efficiency of a refrigeration machine room by an intelligent group control system is characterized by comprising the following steps:
s1, designing a technical circuit: the method comprises the following steps of selecting types of equipment in a machine room, optimizing and installing the equipment, installing an accurate measuring instrument and establishing an intelligent control system; through the internet, the intelligent control system is in data intercommunication with the energy management platform, is in seamless connection, is expanded with functional modules, is displayed on multiple platforms, and can remotely monitor data at a remote client at any time and any place;
s2, machine room equipment installation: installing various machine room devices according to actual working requirements;
s3, mounting the accurate measuring instrument: the selection and installation of the accurate measuring instrument need to meet the design standard, the monitored data is accurate and reliable, the information of the monitored data (energy efficiency, cold quantity and the like) of the accurate energy efficiency system is stored and displayed on a system control platform, a worker analyzes whether the monitored data reaches the performance index or not, a decision is made according to the performance index, the optimal system overall control scheme is searched through historical monitoring data, and the control is carried out according to the formulated control strategy (system strategy and equipment strategy);
s4, installing an intelligent control system: installing intelligent control equipment, optimizing a starting-up strategy, compiling actual operation strategy logic of the equipment, accurately measuring system function and interface customized design and development, intelligently controlling system function and interface customized design and development, intelligently managing report customized design and development of an intelligent system, storing intelligent system data and designing and developing a cloud service function;
s5, debugging the group control system: a system debugging plan of a refrigeration machine room is formulated, and the data acquisition period is 2 weeks, so that the target energy efficiency of the system is achieved;
s6, operation and maintenance management: compiling an operation introduction manual of an intelligent control system of the efficient air conditioning system, training the operation and technology of the intelligent control system for management personnel, and providing an emergency service scheme for maintenance.
2. The method for monitoring and analyzing the operation energy efficiency of the refrigeration machine room by the intelligent group control system according to claim 1, wherein the method comprises the following steps: the equipment in the machine room in the S2 comprises a water chilling unit, a cooling tower, a water pump and a terminal air conditioner.
3. The method for monitoring and analyzing the operation energy efficiency of the refrigeration machine room by the intelligent group control system according to claim 1, wherein the method comprises the following steps: the accurate measuring instrument in S3 includes instruments such as high-accuracy intelligent gateway, accurate cold volume measurement unit, flow sensor, temperature sensor and digital ammeter, and high-accuracy intelligent gateway' S configuration characteristics: the maximum 24-bit resolution is that data recording is within 1 minute interval; the configuration characteristics of accurate cold volume measurement unit: the highest temperature precision is +/-0.03 ℃, and the lowest flow precision is +/-0.05%; the flow sensor has the configuration characteristics that: inserting ultrasonic waves, wherein the accuracy grade is 1 grade, and the pipe diameter range is 50 mm-1200 mm; the configuration characteristics of the temperature sensor are as follows: the precision is +/-0.03 ℃, the temperature range is 0-50 ℃, and a certificate is provided; the configuration characteristics of the digital electric meter are as follows: the accuracy is + -0.5%.
4. The method for monitoring and analyzing the operation energy efficiency of the refrigeration machine room by the intelligent group control system according to claim 1, wherein the method comprises the following steps: and the intelligent control system in the S4 controls the water chilling unit, the freezing pump, the cooling pump and the electric valve of the cooling tower related to the equipment, and sets a control strategy and a control logic.
5. The method for monitoring and analyzing the operation energy efficiency of the refrigeration machine room by the intelligent group control system according to claim 4, wherein the method comprises the following steps: the intelligent control system comprises a database server, a data acquisition, processing and publishing server, an application server, a disk display, a switch, a router and a firewall, and is externally connected with a remote client and an energy efficiency workstation through the Internet, wherein the remote client comprises a mobile phone, a computer and a pad.
6. The method for monitoring and analyzing the operation energy efficiency of the refrigeration machine room by the intelligent group control system according to claim 1, wherein the method comprises the following steps: and the debugging of the group control system in the S5 comprises pre-debugging check, system single machine debugging, system load debugging, intelligent control system operation debugging and preliminary acceptance.
7. The method for monitoring and analyzing the operation energy efficiency of the refrigeration machine room by the intelligent group control system according to claim 1, wherein the method comprises the following steps: the operation and maintenance management in S6 can ensure the efficient operation of the refrigeration machine room group control system through the following aspects:
(1) the efficient air conditioning system machine room part is scheduled for return visit on site;
(2) optimizing control logic according to the building industry;
(3) analyzing energy efficiency by remote online monitoring data;
(4) the expert diagnoses the energy consumption of the air conditioning system on line to ensure the energy efficiency target;
(5) and performing on-site return visit (not less than 4 times/year), recording and warehousing the system operation rules, performing coordinated management, and predicting energy efficiency.
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