CN111595090A - Circulating cooling water energy-saving operation system and method based on information physical system - Google Patents
Circulating cooling water energy-saving operation system and method based on information physical system Download PDFInfo
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- 239000007788 liquid Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 33
- 238000001816 cooling Methods 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 7
- 230000003134 recirculating effect Effects 0.000 description 7
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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Abstract
The invention provides a circulating cooling water energy-saving operation system and method based on an information physical system, wherein the system comprises: the physical layer is provided with a monitoring instrument and an executing mechanism, the monitoring instrument is used for detecting physical quantity information of the circulating cooling water system to obtain a signal of the physical quantity information, and the executing mechanism is used for adjusting operating parameters of the circulating cooling water system; a network layer for transmitting the signal; the information layer is provided with a digital twinning model of the circulating cooling water system, is used for processing the signals and carries out simulation optimization according to the processed physical quantity information through the digital twinning model to obtain optimal control parameters; and the control layer is used for carrying out logic judgment according to the optimal control parameters and sending an execution instruction to the execution mechanism according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system. The system and the method can realize the continuous energy-saving economic operation of the system on the basis of ensuring the stability and the reliability of the system.
Description
Technical Field
The invention relates to an energy-saving technology of a circulating cooling water system, in particular to a circulating cooling water energy-saving operation system and method based on an information physical system.
Background
The circulating cooling water system is a process system which is adopted in industrial enterprises in a large amount, the energy consumption is considerable, and the energy conservation of the system is beneficial to the energy conservation and emission reduction of the industrial enterprises and the enhancement of competitiveness. Because the resistance of a pipe network and the real-time requirement of a production process are difficult to accurately calculate in the design of the industrial circulating cooling water system, the designed and built circulating cooling water system is often not operated under the optimal working condition. Meanwhile, along with the change of production conditions, the change of environment and the change of equipment states, the circulating cooling water system is often in a variable working condition running state, and manual adjustment and local adjustment are difficult to meet the changing requirements, so that the running efficiency of the system is obviously reduced, and the consumption is increased.
One set of recirculating cooling water system often has a plurality of users, and each user often can be with the valve of oneself cooling branch pipeline open entirely, guarantees that oneself's water use is reliable, and this will make the system water delivery volume can not distribute as required, and total water delivery volume increases, and the supply and return water difference in temperature is low, and some is as low as 1.5 ℃ even, and it is big with design difference in temperature 7 ℃, leads to the system energy consumption huge. Moreover, since the adjustment of one user affects all other users, the adjustable range of manual adjustment or automatic adjustment by each adjusting valve is very limited, the system operation may be unstable to affect the production, and the key is that the real-time and accurate adjustment cannot be achieved, so that the problem of huge energy consumption of the system cannot be thoroughly solved. Therefore, in addition to the management and technology, such as the adoption of energy-saving technologies such as high-efficiency pumps and variable-frequency regulation, measures are taken to achieve certain energy conservation, a control strategy obtained by global overall optimization is necessary to be adopted to carry out real-time accurate regulation on the system, and the problem of huge energy consumption of the system in operation can be thoroughly solved.
In the past years, a large amount of technical energy-saving transformation is carried out on a circulating cooling water system in various industrial industries, and the system energy conservation is realized to a certain degree, but the analysis shows that the system still cannot achieve the optimal energy conservation for a long time. It is feared that the development of computer technology and communication technology makes the fusion of the actual physical system and the digital system possible, the digital system can perform operation optimization, and the adjustment parameters obtained after optimization can be used for guiding the adjustment of specific physical system equipment, thereby being beneficial to realizing the optimized operation of the physical system.
Therefore, by establishing a digital twin model of the actual circulating cooling water system, performing operation consumption optimization on the digital twin, giving control parameters such as the valve opening of the actual circulating cooling water system, the use condition and the operation rotating speed of the pump and the fan, and performing accurate adjustment by the executing mechanism, the continuous energy-saving economic operation of the circulating cooling water system can be expected to be realized.
Disclosure of Invention
The invention aims to provide a circulating cooling water energy-saving operation system and a circulating cooling water energy-saving operation method based on an information physical system, and aims to solve the problems that a circulating cooling water system which is adopted in a large number of existing industrial enterprises cannot be stably, reliably and efficiently adjusted according to production and environmental changes, is huge in energy consumption, and cannot continuously achieve optimal energy-saving economic operation.
The second purpose of the invention is to provide a circulating cooling water energy-saving operation system and method based on an information physical system, which are used for solving the problems that the circulating cooling water system is not thorough in energy conservation, not timely adjusted by multiple users, easy to be unstable in adjustment, and incapable of realizing continuous energy-saving economic operation.
In order to achieve the above object, the present invention provides a circulating cooling water energy-saving operation system based on an cyber-physical system, comprising: the physical layer is provided with a monitoring instrument and an executing mechanism, the monitoring instrument is used for detecting physical quantity information of the circulating cooling water system to obtain a signal of the physical quantity information, and the executing mechanism is used for adjusting operating parameters of the circulating cooling water system;
a network layer for transmitting the signal;
the information layer is provided with a digital twin model of the circulating cooling water system, is used for processing the signals from the network layer, and carries out simulation optimization according to the processed physical quantity information through the digital twin model to obtain the optimal control parameters of the circulating cooling water system;
and the control layer is used for carrying out logic judgment according to the optimal control parameters and sending an execution instruction to the execution mechanism according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system.
Preferably, the monitoring meter comprises: pressure, temperature, humidity, flow, liquid level, current, voltage, power factor, vibration and rotating speed monitoring instruments; correspondingly, the physical quantity information includes: pressure, temperature, humidity, flow, level, current, voltage, power factor, vibration, and rotational speed.
Preferably, the network layer includes a wired transmission network and/or a wireless transmission network.
Preferably, the digital twin model comprises a pipe network structure of components and connecting components, the performance of the components is determined by the rated performance of the corresponding components of the mirrored recirculating cooling water system and the received processing information, and the pipe network structure is the same as that of the mirrored recirculating cooling water system.
Preferably, the actuating mechanism comprises a valve opening adjusting mechanism of the circulating cooling water system, and a start-stop and rotation speed adjusting device of a pump and a fan. .
Preferably, the information layer comprises an information processing module and a digital twin model simulation optimization module, and the information processing module is used for filtering, cleaning and mapping the signal; and the digital twin model simulation optimization module is used for carrying out simulation optimization according to the data processed by the information processing module to obtain the optimal control parameters of the circulating cooling water system.
The invention also provides a circulating cooling water energy-saving operation method based on the information physical system, which comprises the following steps:
s1: detecting physical quantity information of the circulating cooling water system through a monitoring instrument in a physical layer, and transmitting an obtained signal to an information layer through a network layer;
s2: the signal is processed in the information layer and then is transmitted to a digital twin model of a circulating cooling water system in the information layer;
s3: performing operation simulation optimization through the digital twin model according to the processed physical quantity information to obtain the optimal control parameter of the circulating cooling water system and transmitting the optimal control parameter to the control layer;
s4: and the control layer carries out logic judgment according to the optimal control parameters and sends an execution instruction to an execution mechanism in the physical layer according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system.
Preferably, the physical quantity information includes: pressure, temperature, humidity, flow, level, current, voltage, power factor, vibration, and rotational speed.
Preferably, the digital twin model comprises a preset pipe network structure of components and connecting components, the performance of the components is determined by the rated performance of the corresponding components of the mirrored circulating cooling water system and the received information, and the pipe network structure is the same as that of the mirrored circulating cooling water system.
Preferably, the simulation optimization goal of the digital twin model is as follows: the running cost of the circulating cooling water system; the optimization parameters of the digital twin model are as follows: the valve opening of the circulating cooling water system, the use condition and the running speed of the pump and the fan.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1) the circulating cooling water energy-saving operation system and method based on the information physical system are suitable for various industrial circulating cooling water systems, and can realize continuous energy-saving and economic operation of the system;
2) the energy-saving circulating cooling water operation system and method based on the information physical system can carry out overall planning from the perspective of the whole system on the basis of less equipment transformation investment, so that the circulating cooling water system has higher cost performance;
3) the circulating cooling water energy-saving operation system and method based on the cyber-physical system can perform self-adaptive optimal adjustment on the changing production process requirements and environment and can keep normal operation of equipment;
4) the energy-saving circulating cooling water operation system and method based on the information physical system can keep the system to operate safely, stably and reliably under the condition that a plurality of circulating cooling water users adjust the system at the same time, so that the adjustment is more efficient.
Drawings
FIG. 1 is a schematic diagram of a typical recirculating cooling water system;
FIG. 2 is a schematic diagram of the system components provided in the preferred embodiment of the present invention;
fig. 3 is a schematic flow chart of a method provided by the preferred embodiment of the present invention.
Description of reference numerals: 1. 2, 3: a circulation pump; 4. 5, 6: a control valve; 7. 8, 9: a heat exchanger; 10. 11, 12: adjusting a valve; 13: a cold water tank; 14: and (5) cooling the tower.
Detailed Description
While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
As shown in fig. 1, a general circulating cooling water system includes a cold water tank 13, a circulating pump group (including circulating pumps 1, 2, and 3), a heat exchanger group (heat exchangers 7, 8, and 9), a cooling tower 14, and a valve group (including control valves 4, 5, and 6 and control valves 10, 11, and 12) connected in sequence through a pipeline, wherein the circulating pump is driven by a motor, and the cooling tower 14 is provided with a fan driven by the motor. The invention provides a circulating cooling water energy-saving operation system based on an information physical system aiming at the circulating cooling water system, so as to realize the continuous, energy-saving and economic operation of the circulating cooling water system.
As shown in fig. 2, the embodiment provides a recirculated cooling water energy-saving operation system based on an cyber-physical system, which is used for performing optimal adjustment on the operation parameters of the recirculated cooling water system. The system comprises: the physical layer 1 is provided with a monitoring instrument 11 and an executing mechanism 12, the monitoring instrument of the physical layer is used for detecting physical quantity information of the circulating cooling water system to obtain a signal of the physical quantity information, and the executing mechanism (valve) of the physical layer 1 is used for adjusting operating parameters of the circulating cooling water system; a network layer 2 for transmitting a signal of physical quantity information from the physical layer 1; an information layer 3, which is provided with a digital twin model of the circulating cooling water system, wherein the information layer 3 is used for processing the signals of the physical quantity information transmitted from the network layer, and the digital twin model of the information layer is adopted to carry out simulation optimization according to the processed physical quantity information, so that the optimal control parameters of the circulating cooling water system are obtained; and the control layer 4 is used for carrying out logic judgment according to the optimal control parameters and sending an execution instruction to the execution mechanism according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system.
The actuating mechanism mainly comprises a valve opening adjusting mechanism of a circulating cooling water system, and a start-stop and rotating speed adjusting device of a pump and a fan. The operation parameters of the circulating cooling water system can be adjusted through the equipment.
The physical layer, the network layer, the information layer and the control layer of the energy-saving circulating cooling water operation system form an information physical system, and the information physical system is an infrastructure for providing information acquisition, transmission, processing and control execution for optimization of a circulating cooling water system. Based on the four-layer structure of the information physical system, the continuous energy-saving economic operation of the circulating cooling water system is realized, the safe and reliable operation of the system is ensured, and the adjustment is timely and accurate.
The embodiment also provides a circulating cooling water energy-saving operation method based on the cyber-physical system, which specifically comprises the following steps:
s1: detecting physical quantity information of the circulating cooling water system through a monitoring instrument in a physical layer, and transmitting an obtained signal to an information layer through a network layer;
s2: the signal is processed in the information layer and then is transmitted to a digital twin model of a circulating cooling water system in the information layer;
s3: performing operation simulation optimization through the digital twin model according to the processed physical quantity information to obtain the optimal control parameter of the circulating cooling water system and transmitting the optimal control parameter to the control layer;
s4: and the control layer carries out logic judgment according to the optimal control parameters and sends an execution instruction to an execution mechanism in the physical layer according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system.
Specifically, the monitoring meter 11 of the physical layer 1 in this embodiment includes: pressure, temperature, humidity, flow, liquid level, current, voltage, power factor, vibration and rotating speed monitoring instruments; correspondingly, the physical quantity information detected by the physical layer includes: pressure, temperature, humidity, flow, level, current, voltage, power factor, vibration, and rotational speed. The pressure gauge (i.e. pressure monitoring instrument) is used for monitoring the pressure of the outlet of each circulating pump of the circulating cooling water system, the pressure of the main pipe, the pressure of the heat exchange branch on the main pipe, the pressure on the outlet pipeline of each branch heat exchanger, the pressure of the tower pipeline on the cooling tower and the like. The thermometer (temperature monitoring instrument) is used for monitoring the water temperature of the cold water pool, the water temperature of the main pipe, the water temperature of the outlet of each branch heat exchanger, the water temperature of the upper tower of the cooling tower and the like. The humidity meter is used for measuring the ambient humidity. The flow meter (flow monitoring instrument) is used for monitoring the outlet flow of each circulating pump, the flow of the main pipe, the flow of the outlet pipeline of each branch heat exchanger and the like. The liquid level meter (liquid level monitoring instrument) is used for measuring the liquid level of the cold water pool. The ammeter (current monitoring instrument) is used for monitoring the running current of each circulating pump and each cooling tower fan. A voltmeter (voltage monitoring instrument) is used to monitor the grid supply voltage. The power factor meter (power factor monitoring instrument) is used for testing the power factors of the circulating pumps and the fan motors of the cooling towers. The vibration meter (vibration monitoring instrument) is used for monitoring parameters such as vibration speed of each circulating pump, each cooling tower fan and the motor thereof. And the revolution meter (revolution speed monitoring instrument) is used for monitoring the revolution speeds of the circulating pumps and the cooling tower fans. The actuating mechanism 12 of the physical layer mainly includes various valves, such as inlet and outlet control valves of various circulating pumps, regulating valves on heat exchange branch pipelines, regulating valves on main pipelines, and the like, opening regulating mechanisms, and start-stop and rotating speed regulating devices of various circulating pumps and fans.
In the present embodiment, the network layer includes the wired transmission network 21 and the wireless transmission network 22, and in the step S1, the physical quantity information of the physical layer may be transmitted through the wired transmission network and the wireless transmission network of the network layer. Of course, in other preferred embodiments, the network layer may only be provided with a wired transmission network or only a wireless transmission network, and accordingly, the above-mentioned physical quantity information may be transmitted only through the wired transmission network or the wireless transmission network.
Specifically, the wired transmission network of the cyber layer of the cyber physical system may include: various field buses or multi-wire connection modes; the wireless transmission network may include: 3G, 4G, 5G and the like, and LoRa, NB-IOT, WiFi and the like. Through these communication modes, the signals collected by the physical layer can be transmitted to the information layer.
Referring again to fig. 2, the information layer of the present embodiment includes an information processing module 31 and a digital twin model simulation optimization module 32. Then, in step S2, after receiving the signals transmitted by the network layer, the information layer 3 first processes the signals of the physical quantity information transmitted by the network layer through the information processing module 31. Specifically, the signals transmitted by the physical layer are processed in the information layer by filtering, cleaning, mapping and the like, so that the signal data can be used by the digital twin model and is convenient to store, search and display.
Subsequently, step S3 is executed by the digital twin model simulation optimization module 32 according to the data processed by the information processing module 31, and the optimal control parameters obtained by the digital twin model simulation optimization are transmitted to the control layer.
Specifically, the digital twin model of the information layer in this embodiment is a digital mirror image of the recirculating cooling water system, and the model specifically includes: subassembly and coupling assembling's pipe network structure. Wherein, the performance of the components is determined by the rated performance of the corresponding components of the mirror image recirculating cooling water system, or the performance of the components obtained through actual test, and the received processing information, and the pipe network structure is the same as that of the mirror image recirculating cooling water system.
For example, for a circulation pump, the rated performance characteristics of the circulation pump may be obtained from factory data of the manufacturer, and the performance of the circulation pump may be modified in combination with the received processed information to reflect the current actual performance characteristics of the circulation pump. If the least square cubic polynomial is adopted to fit the flow and lift characteristics of the circulating pump given by a manufacturer, the following equation is obtained:
H＝aQ3+bQ2+cQ+d (1)
wherein: h is the head of the circulating pump, a, b, c and d are fitting parameters, and Q is the flow of the circulating pump.
And introducing individual undetermined parameters to obtain the performance characteristics of the circulating pump assembly in the digital twin model:
H′＝k(aQ3+bQ2+cQ+d) (2)
wherein: h' is the corrected lift of the circulating pump, and k is a parameter to be determined.
The information collected by the physical layer of the information physical system comprises parameters such as current, voltage, power factor, rotating speed, cold water pool liquid level, circulating pump outlet pressure and flow of the circulating pump, the actual lift, output power, input power (running power), efficiency and other parameters of the circulating pump can be calculated by hydraulics and an electromechanics equation, and the parameters determine the current actual performance of the circulating pump. And (3) substituting the actual lift into the formula (2) to obtain the undetermined coefficient k, thus determining the flow lift characteristic of the circulating pump assembly in the digital twin model, and calculating the actual lift of the circulating pump under different flows by the determined formula (2) through subsequent operation simulation optimization. Similar processing can obtain other relevant parameters such as the running power of the circulating pump under different flow rates.
Similarly, the heat exchanger, the cooling tower and the pipe section can be defined by a performance model by adopting a form which contains undetermined parameters and is based on a mathematical physical model established by a basic physical theory. For valves, the following equation can be used:
wherein: q is the flow through the valve, m is the undetermined parameter, lambda is the valve opening, e, f are the fitting parameters, and Δ p is the differential pressure before and after the valve.
According to the steps, when the component performance in the digital twin model is determined, the rated performance characteristics of the circulating cooling water system component and the physical quantity information obtained by actual testing are used, so that the basic performance characteristics and the current actual performance condition of the circulating cooling water system component can be reflected, the obtained digital twin model can truly reflect the actual performance of the mirrored circulating cooling water system, and the subsequent operation simulation optimization has pertinence and accuracy.
Further, the simulation optimization goal of the digital twin model provided by the system of the embodiment is as follows: the running cost of the circulating cooling water system is minimized. The operation cost includes one or more of operation energy consumption, equipment loss, maintenance cost, water loss, water treatment cost and the like, and a person skilled in the art can freely select a specific optimization target according to needs and can also define the life cycle cost of the mirrored circulating cooling water system.
And the optimization parameters of the digital twin model are as follows: the valve opening of the circulating cooling water system, the use condition and the running speed of the pump and the fan. The constraints comprise equality and inequality constraints, and are used for giving system composition and component performance conditions, meeting the requirements of a production process and the requirements of stable, reliable and efficient operation of components and the like. Because the optimization problem is a mixed integer nonlinear programming problem, a layered nesting algorithm can be adopted for solving.
For example, referring to FIG. 1, a circulating cooling water system with three circulating pumps, three heat exchange branches and one cooling tower is designed to supply water at a temperature not higher than 33 ℃ and return water at a temperature not higher than 40 ℃. The actual operation monitoring in a certain state shows that the water temperature of the water supply main pipe is 28 ℃, the water temperatures of the outlets of the three heat exchange branch heat exchangers are respectively 31 ℃, 33 ℃ and 38 ℃, the heat exchange branch control valves are all opened, and the water flow of each heat exchange branch is 200m3Per h, total water delivery of the system is 600m3And h, the water temperature of the upper tower of the cooling tower is 34 ℃. The skilled person can judge that the water distribution of several heat exchange branches of the system is not distributed according to the requirement, and there is energy loss caused by overlarge total water supply, but the skilled person can not accurately evaluate the water distribution in real timeWhen one heat exchange branch control valve is adjusted, the water amount of each heat exchange branch is changed, so that the system operation is difficult to rapidly stabilize, the system operation condition is frequently changed, and the water amount distribution is also changed, so that the thorough energy-saving economic operation of the system cannot be realized by manual adjustment of technicians. The method provided by the invention is adopted for optimization, the valve opening degrees of the first heat exchange branch and the second heat exchange branch and the rotating speed of the operating pump can be given at the same time, the adjustment becomes quick and accurate, the system stability is stronger, and the system can be in an energy-saving and economic operation state for more time. Through adjustment, the total water delivery is reduced, the water temperature of the upper tower is increased to 38 ℃, the safe and reliable operation requirements of the production process and the system can still be met, the total water delivery can be greatly reduced, the operation power of a circulating pump can also be greatly reduced, and the total energy consumption of the system can be expected to be saved by more than 30%.
In step S4, the control layer of the cyber-physical system performs logical judgment according to the obtained optimal control parameter, and sends an execution instruction to the execution mechanism in the physical layer according to a logical judgment result, so as to complete the optimal adjustment of the operation parameter of the circulating cooling water system.
Specifically, referring to fig. 2, the control layer 4 in the cyber-physical system includes a control unit 41, and the control logic of the control unit 41 enables safe operation of the circulating cooling water system. The control unit can adopt a PLC, a DCS and other control modes, wherein the control program realizes the safety restraint of the circulating cooling water system, such as the requirement on the water temperature of the cold water pool, the requirement on the water temperature of the heat exchange branch outlet or the performance of the heat exchanger by the production process, and the system fault caused by inaccurate monitoring is prevented. The processing mode can ensure the safe and reliable operation of the system to the maximum extent.
The above description is only an 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 able to make modifications or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A recirculated cooling water energy-saving operation system based on an information physical system is characterized by comprising:
the physical layer is provided with a monitoring instrument and an executing mechanism, the monitoring instrument is used for detecting physical quantity information of the circulating cooling water system to obtain a signal of the physical quantity information, and the executing mechanism is used for adjusting operating parameters of the circulating cooling water system;
a network layer for transmitting the signal;
the information layer is provided with a digital twin model of the circulating cooling water system, is used for processing the signals from the network layer, and carries out simulation optimization according to the processed physical quantity information through the digital twin model to obtain the optimal control parameters of the circulating cooling water system;
and the control layer is used for carrying out logic judgment according to the optimal control parameters and sending an execution instruction to the execution mechanism according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system.
2. The cyber-physical system-based circulating cooling water eco-run system according to claim 1, wherein the monitoring meter comprises: pressure, temperature, humidity, flow, liquid level, current, voltage, power factor, vibration and rotating speed monitoring instruments; correspondingly, the physical quantity information includes: pressure, temperature, humidity, flow, level, current, voltage, power factor, vibration, and rotational speed.
3. The cyber-physical system-based circulating cooling water energy-saving operation system according to claim 1, wherein the network layer includes a wired transmission network and/or a wireless transmission network.
4. The energy-saving circulating cooling water operation system based on the cyber-physical system as claimed in claim 1, wherein the digital twin model includes a pipe network structure of components and connecting components, the performance of the components is determined by the rating of the corresponding components of the mirrored circulating cooling water system and the received processing information, and the pipe network structure is the same as that of the mirrored circulating cooling water system.
5. The energy-saving circulating cooling water operation system based on the cyber-physical system as claimed in claim 1, wherein the executing mechanism comprises a valve opening adjusting mechanism of the circulating cooling water system, and a start-stop and rotation speed adjusting device of a pump and a fan.
6. The energy-saving circulating cooling water operation system based on the cyber-physical system as claimed in claim 1, wherein the information layer comprises an information processing module and a digital twin model simulation optimization module, and the information processing module is used for filtering, cleaning and mapping the signals; and the digital twin model simulation optimization module is used for carrying out simulation optimization according to the data processed by the information processing module to obtain the optimal control parameters of the circulating cooling water system.
7. A circulating cooling water energy-saving operation method based on an information physical system is characterized by comprising the following steps:
s1: detecting physical quantity information of the circulating cooling water system through a monitoring instrument in a physical layer, and transmitting an obtained signal to an information layer through a network layer;
s2: the signal is processed in the information layer and then is transmitted to a digital twin model of a circulating cooling water system in the information layer;
s3: performing operation simulation optimization through the digital twin model according to the processed physical quantity information to obtain the optimal control parameter of the circulating cooling water system and transmitting the optimal control parameter to the control layer;
s4: and the control layer carries out logic judgment according to the optimal control parameters and sends an execution instruction to an execution mechanism in the physical layer according to a logic judgment result so as to complete the optimization and adjustment of the operation parameters of the circulating cooling water system.
8. The cyber-physical system-based circulating cooling water energy-saving operation method according to claim 7, wherein the physical quantity information includes: pressure, temperature, humidity, flow, level, current, voltage, power factor, vibration, and rotational speed.
9. The energy-saving circulating cooling water operation method based on the cyber-physical system according to claim 7, wherein the digital twin model includes a predetermined pipe network structure of components and connecting components, the performance of the components is determined by the rating of the corresponding components of the mirrored circulating cooling water system and the received information, and the pipe network structure is the same as that of the mirrored circulating cooling water system.
10. The energy-saving operation method for circulating cooling water based on an cyber-physical system according to claim 7, wherein the simulation optimization goal of the digital twin model is as follows: the running cost of the circulating cooling water system is minimized; the optimization parameters of the digital twin model are as follows: the valve opening of the circulating cooling water system, the use condition and the running speed of the pump and the fan.
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