CN114413457B - Optimization control method and device for air conditioning system, electronic equipment and storage medium - Google Patents
Optimization control method and device for air conditioning system, electronic equipment and storage medium Download PDFInfo
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- CN114413457B CN114413457B CN202210084588.8A CN202210084588A CN114413457B CN 114413457 B CN114413457 B CN 114413457B CN 202210084588 A CN202210084588 A CN 202210084588A CN 114413457 B CN114413457 B CN 114413457B
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F11/84—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 valves
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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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application relates to the technical field of air conditioners, in particular to an optimization control method and device for an air conditioning system, electronic equipment and a storage medium, wherein the method comprises the following steps: detecting the average current percentage of the water-cooling centrifugal chiller; and when the average current percentage is higher than the critical current percentage, adopting a first optimizing control strategy, otherwise, judging whether the cold source is allowed to be closed to be any cold machine in the water-cooling centrifugal water chilling unit. And if any cold machine is allowed to be closed, closing any cold machine, continuously detecting the average current percentage until the air-conditioning system meets the optimization condition of the air-conditioning system under the low load, and adopting a second optimization control strategy. When the load of the air conditioning system is lower than the preset load, the purpose of optimal control is achieved. Therefore, the problem that the cold machine energy efficiency is obviously reduced due to the adoption of a refrigerant bypass control scheme under low load of the cold water unit in the past is solved.
Description
Technical Field
The present disclosure relates to the field of air conditioning technologies, and in particular, to an optimization control method and apparatus for an air conditioning system, an electronic device, and a storage medium.
Background
The centrifugal water chilling unit is a common cold source of an air conditioning system, when the ambient temperature is high, the running pressure of the compressor is high, when the compressor runs at low load, the compressor is easy to surge, and the cold machine cannot work normally. The cold machine manufacturer mainly prevents the compressor from surging by a refrigerant bypass method, which can make the cold water unit normally operate under low load, but the energy efficiency of the cold water unit is reduced due to the large amount of bypass of the refrigerant.
Therefore, the control scheme of the air conditioning system in the related art generally controls the maximum limit values of the outlet water temperature and the current of the water chilling unit only according to the indoor load demand, and neglects the problem of energy efficiency reduction caused by refrigerant bypass under low load.
Disclosure of Invention
The application provides an optimization control method and device for an air conditioning system, electronic equipment and a storage medium, and aims to solve the problem that the cold machine energy efficiency is obviously reduced due to the adoption of a refrigerant bypass control scheme under the low load of a cold water unit in the past.
An embodiment of a first aspect of the present application provides an optimization control method for an air conditioning system, where a cold source of the air conditioning system is a water-cooling centrifugal chiller, where the method includes the following steps: detecting the average current percentage of the water-cooled centrifugal chiller; when the average current percentage is higher than the critical current percentage, adopting a first optimization control strategy, otherwise, judging whether the cold source is allowed to be closed to be any cold machine in the water-cooling centrifugal type water chilling unit or not; and if any cold machine is allowed to be closed, closing any cold machine, continuously detecting the average current percentage until the air-conditioning system meets the air-conditioning system optimizing condition under the low load, and adopting a second optimizing control strategy to achieve the aim of optimal control when the load of the air-conditioning system is lower than the preset load.
Further, the judging whether to allow the cold source to be turned off is any one of the water-cooled centrifugal chiller units, and includes: acquiring the number of cold sources which are the starting numbers of cold machines in the water-cooling centrifugal water chilling unit; and when the number of the cold machines is larger than the preset number, judging that any cold machine is allowed to be closed.
Optionally, the optimization condition of the air conditioning system under low load may be that the number of cold machines is a preset number.
Further, a second optimization control strategy is adopted to achieve the purpose of optimal control when the air conditioning system is lower than the preset load, and the method comprises the following steps: detecting the actual opening degree of a bypass valve in the water-cooling centrifugal chiller; and when the actual opening degree is larger than the preset opening degree, increasing the current operating frequency of the cooling tower by a first preset threshold value, and after a first preset time duration, continuously detecting the actual opening degree until the actual opening degree is smaller than the preset opening degree.
Further, before the actual opening degree is smaller than the preset opening degree, the method further comprises: judging whether the frequency of the cooling tower reaches the power frequency; and when the power frequency is reached, maintaining the cooling tower to work at the preset opening degree, and simultaneously opening a new cooling tower to carry out cooperative work according to a preset working strategy.
Further, after the new cooling tower is opened to perform the cooperative work according to the preset working strategy, the method further comprises the following steps: judging whether the frequencies of the two cooling towers reach the power frequency; and if the frequencies of the two cooling towers reach the power frequency and the actual opening of the bypass valve is larger than the preset opening, increasing the current operating frequency of a chilled water pump of the air-conditioning system by a second preset threshold value, and continuously detecting the actual opening after the second preset duration is continued until the current operating frequency is increased to the power frequency.
The embodiment of the second aspect of this application provides an air conditioning system optimizing control device, air conditioning system's cold source is water-cooling centrifugal chiller, wherein, the device includes: the detection module is used for detecting the average current percentage of the water-cooling centrifugal chiller; a first control module for employing a first optimization control strategy when it is detected that the average current percentage is higher than a critical current percentage; the judging module is used for judging whether the cold source is allowed to be closed to any one of the water-cooling centrifugal water chilling unit or not when the average current percentage is detected to be smaller than or equal to the critical current percentage; and the second control module is used for closing any cold machine when the cold machine is allowed to be closed, continuously detecting the average current percentage until the air-conditioning system meets the optimization condition of the air-conditioning system under low load, and adopting a second optimization control strategy to achieve the purpose of optimal control when the load of the air-conditioning system is lower than the preset load.
Further, the determining module is configured to: acquiring the number of cold sources which are the starting numbers of cold machines in the water-cooling centrifugal water chilling unit; and when the number of the cold machines is larger than the preset number, judging that any cold machine is allowed to be closed.
Optionally, the optimization condition of the air conditioning system under low load may be that the number of cold machines is a preset number.
Further, the second control module is configured to: detecting the actual opening degree of a bypass valve in the water-cooling centrifugal chiller; and when the actual opening degree is larger than the preset opening degree, increasing the current operation frequency of the cooling tower by a first preset threshold value, and after the first preset time duration, continuously detecting the actual opening degree until the actual opening degree is smaller than the preset opening degree.
The second control module is further used for judging whether the frequency of the cooling tower reaches power frequency or not before the actual opening degree is smaller than the preset opening degree; and when the power frequency is reached, maintaining the cooling tower to work at the preset opening degree, and simultaneously opening a new cooling tower to carry out cooperative work according to a preset working strategy.
Further, the second control module is further configured to determine whether the frequencies of the two cooling towers both reach the power frequency after a new cooling tower is opened to perform cooperative work according to a preset working strategy; and if the frequencies of the two cooling towers reach the power frequency and the actual opening of the bypass valve is larger than the preset opening, increasing the current operating frequency of a chilled water pump of the air-conditioning system by a second preset threshold value, and continuously detecting the actual opening after the second preset duration is continued until the current operating frequency is increased to the power frequency.
An embodiment of a third aspect of the present application provides an electronic device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the air conditioning system optimizing control method according to the embodiment.
A fourth aspect of the present application provides a computer-readable storage medium storing computer instructions for causing a computer to execute the air conditioning system optimization control method according to the above embodiment.
Therefore, the application has at least the following beneficial effects:
the opening state of a refrigerant bypass valve in the water chilling unit is monitored, the state is brought into the control of the whole air conditioning system, the phenomenon that the energy efficiency of the water chilling unit is low due to refrigerant bypass under low load is avoided by adjusting other control parameters of the air conditioning system, the operation energy efficiency of the water chilling unit is improved from the perspective of the air conditioning system, and meanwhile noise generated by the water chilling unit when a bypass pipeline and the valve are opened can be avoided. Therefore, the problem that the cold machine energy efficiency is obviously reduced due to the adoption of a refrigerant bypass control scheme under low load of the cold water unit in the past is solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flowchart of an optimization control method for an air conditioning system according to an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating an optimization control method for an air conditioning system according to an embodiment of the present application;
FIG. 3 is a diagram illustrating an exemplary optimizing control device of an air conditioning system according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
An air conditioning system optimization control method, an air conditioning system optimization control device, an electronic apparatus, and a storage medium according to embodiments of the present application are described below with reference to the drawings. In the method, the opening state of a refrigerant bypass valve in the water chilling unit is monitored, the state is incorporated into the control of the whole air conditioning system, and other control parameters of the air conditioning system are adjusted to avoid the phenomenon that the unit energy efficiency is low due to the bypass of the refrigerant under low load, so that the operation energy efficiency of the water chilling unit is improved from the perspective of the air conditioning system, and meanwhile, the noise generated by the water chilling unit when a bypass pipeline and a valve are opened can be avoided. Therefore, the problem that the cold machine energy efficiency is obviously reduced due to the adoption of a refrigerant bypass control scheme under low load of the cold water unit in the past is solved.
Specifically, fig. 1 is a schematic flowchart of an optimization control method of an air conditioning system according to an embodiment of the present disclosure. The cold source of the air conditioning system is a water-cooling centrifugal water chilling unit, and the air conditioning system can realize that one water chilling unit operates corresponding to a plurality of cooling towers.
As shown in fig. 1, the optimizing control method of the air conditioning system includes the following steps:
in step S101, the average current percentage of the water-cooled centrifugal chiller is detected.
In step S102, when it is detected that the average current percentage is higher than the critical current percentage, a first optimization control strategy is adopted, otherwise, it is determined whether to allow the cold source to be turned off as any one of the water-cooled centrifugal chiller units.
The first optimization control strategy refers to a conventional optimization control method in the air conditioning field, and a person skilled in the art can specifically select the first optimization control strategy according to actual needs, which is not specifically limited.
The critical current percentage may be provided by a chiller manufacturer or specifically calibrated, but is not limited to this.
It can be understood that, the embodiment of the present application can monitor the average current percentage of the water chilling unit, and when the average current percentage is higher than the critical current percentage, a conventional optimization control method is adopted; and when the average current percentage of the water chilling units is lower than the critical current percentage, judging whether one of the chillers can be closed.
In this embodiment, determining whether to allow the cold source to be turned off is any one of the water-cooled centrifugal chiller units includes: acquiring the number of cold sources which are the starting numbers of the cold machines in the water-cooling centrifugal water chilling unit; and when the number of the opened cold machines is larger than the preset number, judging that any cold machine is allowed to be closed.
The preset number may be specifically set or calibrated according to actual conditions, for example, may be set to 1 or 2, and is not particularly limited.
It can be understood that in the embodiment of the present application, whether any refrigerator is allowed to be turned off or not can be determined when the number of the cold machines is increased, and the turning off is allowed when the number of the cold machines is increased to a certain value.
In step S103, if any of the chillers is allowed to be turned off, turning off any of the chillers, and continuing to detect the average current percentage until the air conditioning system meets the optimization condition of the air conditioning system under low load, and using a second optimization control strategy to achieve the purpose of optimal control when the load of the air conditioning system is lower than the preset load.
The optimization condition of the air conditioning system under the low load can be that the number of the cold machines is preset.
The preset load may be specifically set according to an actual control demand, and in this embodiment, the preset load refers to a low load, and therefore, the second optimization control strategy may refer to an optimization control method of the air conditioning system under the low load.
It can be understood that if any cold machine is allowed to be turned off, any cold machine is turned off, otherwise, the optimization control method of the air conditioning system under the low load can be triggered when the optimization condition of the air conditioning system under the low load is met, and the optimization control method of the air conditioning system under the load will be explained below.
In this embodiment, a second optimization control strategy is adopted to achieve the purpose of optimal control when the air conditioning system is lower than the preset load, and the second optimization control strategy includes: detecting the actual opening degree of a bypass valve in a water-cooling centrifugal chiller; and when the actual opening degree is larger than the preset opening degree, increasing the current operation frequency of the cooling tower by a preset threshold value, and continuously detecting the actual opening degree after the first preset time duration is continued until the actual opening degree is smaller than the preset opening degree.
The preset opening, the first preset threshold, and the first preset duration may all be specifically set or calibrated according to actual control requirements, for example, the preset opening may be set to 5% or 6%, the first preset threshold may be set to 2Hz or 3Hz, and the first preset duration may be set to 5min or 6min, which is not specifically limited.
It can be understood that, in the embodiment of the present application, the opening state of the refrigerant bypass valve in the water chiller may be monitored, and the operation frequency of the cooling tower, the number of the cooling tower operation units, and the operation frequency of the chilled water pump may be adjusted according to the comparison result between the real-time opening Ks of the bypass valve and the control opening target value, so that the opening of the bypass valve is maintained at or below the control opening target value, and thus the angle of the whole air conditioning system may be set, the problem of low unit energy efficiency caused by refrigerant bypass under low load of the variable frequency centrifuge may be avoided, so that the operation energy efficiency of the water chiller may be significantly improved, and noise generated by the water chiller when the bypass pipeline and the valve are opened may be avoided.
In this embodiment, before the step of making the actual opening degree smaller than the preset opening degree, the method further includes: judging whether the frequency of the cooling tower reaches the power frequency; when the power frequency is reached, the new cooling tower is opened to carry out cooperative work according to a preset working strategy while the cooling tower is maintained to work according to a preset opening degree.
It can be understood that, in the embodiment of the present application, after the current operating frequency of the cooling tower is increased by the preset threshold and lasts for the first preset time, if the actual opening is still greater than the preset opening, the cooling tower continues to increase the operating frequency by the step length of the preset threshold, and if the actual opening of the bypass valve is smaller than the preset opening before the frequency of the cooling tower reaches the power frequency, the fan frequency of the cooling tower is not adjusted at this time, and the current frequency is maintained to operate; and if the frequency of the cooling tower is increased to the power frequency and the opening degree of the bypass valve is still increased, one cooling tower is added.
The preset working strategy specifically comprises the following steps: the second cooling tower is put into operation at the minimum frequency, and in the adjusting process of the first cooling tower, the fan frequency of the cooling tower is not adjusted any more at the moment if the actual opening of the bypass valve is smaller than the preset opening before the frequency of the two cooling towers is lower than the power frequency, and the current frequency is maintained to be operated; and if the frequency of the two cooling towers is increased to the power frequency and the opening of the bypass valve is still increased, increasing the frequency of the chilled water pump.
In this embodiment, after the new cooling tower is opened to perform the cooperative operation according to the preset operation strategy, the method further includes: judging whether the frequencies of the two cooling towers reach the power frequency; and if the frequencies of the two cooling towers reach the power frequency and the actual opening of the bypass valve is larger than the preset opening, increasing the current operating frequency of a chilled water pump of the air-conditioning system by a second preset threshold, and continuously detecting the actual opening after the second preset time duration is continued until the current operating frequency is increased to the power frequency.
The second preset threshold and the second preset duration may be specifically set or calibrated according to actual control requirements, for example, the second preset threshold may be set to 2Hz or 3Hz, and the second preset duration may be set to 5min or 6min, and the like, which is not specifically limited.
It can be understood that after the current operating frequency of the chilled water pump is increased by a preset threshold value and the frequency is maintained to operate for a second preset time, if the actual opening of the bypass valve is smaller than the preset opening, the chilled water pump will maintain the frequency to operate; and if the opening of the bypass valve continues to rise or is kept unchanged, continuing to rise the running frequency of the chilled water pump by the step length of the preset threshold until the frequency of the chilled water pump rises to the power frequency.
The following explains the air conditioning system optimization control method by a specific embodiment, in the following embodiment, taking the preset number of units as 1, the preset opening as 5%, the first preset threshold as 2Hz, the first preset duration as 5min, the second preset threshold as 2Hz, and the second preset duration as 5min as an example, as shown in fig. 2, the method includes the following steps:
1) And monitoring the average current percentage alpha v of the water chilling unit, and adopting a conventional optimization control method when the average current percentage alpha v is more than or equal to the surge critical current percentage alpha 0 (which can be provided by a water chilling unit manufacturer).
2) And when the average current percentage alpha v of the water chilling unit is less than alpha 0, acquiring the number Nc of the started chillers. If Nc is more than 1, closing a cooling machine, running for 10min, monitoring the average current percentage alpha v of the cooling machine set, and if the alpha v is more than or equal to alpha 0, adopting a conventional optimization control method; if the alpha v is less than the alpha 0, continuously closing the cold machine, and after running for 10min, comparing the alpha v with the alpha 0 until the alpha v is more than or equal to the alpha 0, and keeping the current number of the cold water units running. And if Nc =1, triggering the optimization control of the air conditioning system under the low load.
3) And acquiring the real-time opening Ks of a bypass valve in the water chilling unit, and increasing the current operation frequency ft of the cooling tower by 2Hz when the Ks is more than 5 percent (an opening control target value).
4) Maintaining the raised frequency of the cooling tower to run for 5min, if the Ks of the opening of the bypass valve is still larger than 5%, continuing to raise the running frequency of the cooling tower in a step length of 2Hz, if the Ks of the bypass valve is smaller than 5% before the frequency of the cooling tower reaches the power frequency, at this time, no longer adjusting the fan frequency of the cooling tower, and maintaining the current frequency to run; and if the frequency of the cooling tower is increased to the power frequency and the opening degree of the bypass valve is still increased, one cooling tower is added.
5) The second cooling tower is put into operation at the minimum frequency, the adjusting process in the step 3) is repeated, and if the Ks of the bypass valve is less than 5 percent before the frequency of the two cooling towers is lower than the power frequency, the fan frequency of the cooling tower is not adjusted any more, and the current frequency is maintained to be operated; and if the frequency of the two cooling towers is increased to the power frequency and the opening of the bypass valve is still increased, increasing the frequency of the chilled water pump.
6) Increasing the current running frequency fp of the chilled water pump by 2Hz, and maintaining the running of the frequency for 5min, wherein if the opening Ks of the bypass valve is less than 5%, the chilled water pump maintains the running of the frequency; and if the opening of the bypass valve is continuously increased or maintained, continuously increasing the operating frequency of the chilled water pump by 2Hz step length until the frequency of the chilled water pump is increased to the power frequency.
According to the optimization control method for the air conditioning system, the opening state of the refrigerant bypass valve in the water chilling unit is monitored, the state is incorporated into the control of the whole air conditioning system, the phenomenon that the energy efficiency of the unit is low due to refrigerant bypass of the water chilling unit under low load is avoided by adjusting other control parameters of the air conditioning system, the operation energy efficiency of the water chilling unit is improved from the perspective of the air conditioning system, and meanwhile noise generated by the water chilling unit when the bypass pipeline and the valve are opened can be avoided.
Next, an air conditioning system optimization control apparatus according to an embodiment of the present application will be described with reference to the drawings.
Fig. 3 is a block diagram of an air conditioning system optimizing control device according to an embodiment of the present application.
Wherein, the cold source of the air conditioning system is a water-cooling centrifugal chiller, as shown in fig. 3, the optimizing control device 10 of the air conditioning system includes: the device comprises a detection module 100, a first control module 200, a judgment module 300 and a second control module 400.
The detection module 100 is used for detecting the average current percentage of the water-cooling centrifugal chiller; the first control module 200 is operable to employ a first optimization control strategy when the average current percentage is detected to be higher than the critical current percentage; the judging module 300 is configured to judge whether to allow the cold source to be turned off when the average current percentage is detected to be less than or equal to the critical current percentage; the second control module 400 is configured to close any one of the coolers when the cooler is allowed to be closed, and continue to detect the average current percentage until the air conditioning system meets the optimization condition of the air conditioning system under the low load, and adopt a second optimization control strategy to achieve the purpose of optimal control when the load of the air conditioning system is lower than the preset load.
In this embodiment, the determining module 300 is configured to: acquiring the number of cold sources which are the starting numbers of the cold machines in the water-cooling centrifugal water chilling unit; and when the number of the opened cold machines is larger than the preset number, judging that any cold machine is allowed to be closed.
In this embodiment, the optimization condition of the air conditioning system under low load may be that the number of cold machines is equal to the preset number.
In this embodiment, the second control module 400 is configured to: detecting the actual opening degree of a bypass valve in a water-cooling centrifugal chiller; and when the actual opening degree is larger than the preset opening degree, increasing the current operating frequency of the cooling tower by a first preset threshold value, and after the first preset time duration, continuously detecting the actual opening degree until the actual opening degree is smaller than the preset opening degree.
In this embodiment, the second control module 400 is further configured to determine whether the frequency of the cooling tower reaches the power frequency before the actual opening degree is smaller than the preset opening degree; when the power frequency is reached, the new cooling tower is opened to carry out cooperative work according to a preset working strategy while the cooling tower is maintained to work according to a preset opening degree.
In this embodiment, the second control module 400 is further configured to determine whether the frequencies of the two cooling towers both reach the power frequency after the new cooling tower is opened to perform cooperative work according to a preset work strategy; and if the frequencies of the two cooling towers reach the power frequency and the actual opening of the bypass valve is larger than the preset opening, increasing the current operating frequency of a chilled water pump of the air-conditioning system by a second preset threshold value, and continuously detecting the actual opening after the second preset time duration is continued until the current operating frequency is increased to the power frequency.
It should be noted that the above explanation of the embodiment of the optimization control method for an air conditioning system is also applicable to the optimization control device for an air conditioning system of the embodiment, and is not repeated herein.
According to the optimizing control device of the air conditioning system, the opening state of the refrigerant bypass valve in the water chilling unit is monitored, the state is incorporated into the control of the whole air conditioning system, the phenomenon that the energy efficiency of the unit is low due to refrigerant bypass of the water chilling unit under low load is avoided by adjusting other control parameters of the air conditioning system, the operation energy efficiency of the water chilling unit is improved from the perspective of the air conditioning system, and meanwhile noise generated by the water chilling unit when the bypass pipeline and the valve are opened can be avoided.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
The processor 402, when executing the program, implements the air conditioning system optimization control method provided in the above-described embodiments.
Further, the electronic device further includes:
a communication interface 403 for communication between the memory 401 and the processor 402.
A memory 401 for storing computer programs executable on the processor 402.
If the memory 401, the processor 402 and the communication interface 403 are implemented independently, the communication interface 403, the memory 401 and the processor 402 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 4, but that does not indicate only one bus or one type of bus.
Alternatively, in practical implementation, if the memory 401, the processor 402, and the communication interface 403 are integrated on one chip, the memory 401, the processor 402, and the communication interface 403 may complete mutual communication through an internal interface.
The processor 402 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the above optimization control method for an air conditioning system.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried out in the method of implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.
Claims (5)
1. An optimization control method for an air conditioning system is characterized in that a cold source of the air conditioning system is a water-cooling centrifugal type water chilling unit, wherein the method comprises the following steps:
detecting the average current percentage of the water-cooling centrifugal chiller;
when the average current percentage is higher than the critical current percentage, adopting a first optimization control strategy, otherwise, judging whether the cold source is allowed to be closed to be any cold machine in the water-cooling centrifugal water chilling unit;
if any cold machine is allowed to be closed, closing any cold machine, and continuously detecting the average current percentage until the air-conditioning system meets the optimization condition of the air-conditioning system under the low load, and adopting a second optimization control strategy to avoid the low energy efficiency caused by the bypass working condition of the refrigerant from the aspect of adjusting the operating parameters of the air-conditioning system instead of the cold machine when the load of the air-conditioning system is lower than the preset load, so as to achieve the purpose of optimal control;
and adopting a second optimization control strategy to avoid low energy efficiency caused by the bypass working condition of the refrigerant from the angle of adjusting the operating parameters of the air conditioning system instead of the cold machine when the air conditioning system is lower than the preset load, so as to achieve the purpose of optimal control, and the optimization control strategy comprises the following steps:
detecting the actual opening degree of a bypass valve in the water-cooling centrifugal chiller;
if the actual opening degree is larger than the preset opening degree, judging whether the frequency of the cooling tower reaches the power frequency;
if the frequency of the cooling tower does not reach the power frequency, increasing the current operating frequency of the cooling tower by a first preset threshold value, and continuing to detect the actual opening after a first preset duration;
if the frequency of the cooling tower reaches the power frequency, maintaining the working of the cooling tower at the preset opening degree, and simultaneously opening a new cooling tower to perform cooperative work by using a preset working strategy, wherein the preset working strategy is as follows: the new cooling tower is put into operation at the minimum frequency, in the adjusting process of the original cooling tower, before the frequencies of the two cooling towers are lower than the power frequency, if the actual opening of the bypass valve is smaller than the preset opening, the adjustment of the fan frequency of the cooling tower is stopped, and the current frequency is maintained to be operated; if the frequency of the two cooling towers is increased to the power frequency and the opening of the bypass valve is still increased, increasing the frequency of the chilled water pump;
after a new cooling tower is opened to carry out cooperative work by a preset working strategy, judging whether the frequencies of the two cooling towers reach the power frequency;
and if the frequencies of the two cooling towers reach the power frequency and the actual opening of the bypass valve is larger than the preset opening, increasing the current operating frequency of a chilled water pump of the air-conditioning system by a second preset threshold value, and continuously detecting the actual opening after the second preset duration is continued until the current operating frequency is increased to the power frequency.
2. The method of claim 1, wherein the air conditioning system under low load condition is that the number of cold machines is a preset number.
3. The optimizing control device of the air conditioning system is characterized in that a cold source of the air conditioning system is a water-cooling centrifugal chiller, wherein the device comprises:
the detection module is used for detecting the average current percentage of the water-cooling centrifugal chiller;
a first control module for employing a first optimization control strategy when the average current percentage is detected to be higher than a critical current percentage;
the judging module is used for judging whether the cold source is allowed to be closed to any one of the water-cooling centrifugal water chilling unit or not when the average current percentage is detected to be smaller than or equal to the critical current percentage;
the second control module is used for closing any cold machine when the cold machine is allowed to be closed, continuously detecting the average current percentage until the air-conditioning system meets the optimization condition of the air-conditioning system under low load, and adopting a second optimization control strategy to avoid low energy efficiency caused by the bypass working condition of the refrigerant from the aspect of adjusting the operating parameters of the air-conditioning system but not the cold machine when the load of the air-conditioning system is lower than the preset load so as to achieve the purpose of optimal control;
the second control module is configured to:
detecting the actual opening degree of a bypass valve in the water-cooling centrifugal chiller;
if the actual opening degree is larger than the preset opening degree, judging whether the frequency of the cooling tower reaches the power frequency;
if the frequency of the cooling tower does not reach the power frequency, increasing the current operating frequency of the cooling tower by a first preset threshold value, and continuing to detect the actual opening after the current operating frequency of the cooling tower lasts for a first preset time;
if the frequency of the cooling tower reaches the power frequency, maintaining the working of the cooling tower at the preset opening degree, and simultaneously opening a new cooling tower to perform cooperative work by using a preset working strategy, wherein the preset working strategy is as follows: the new cooling tower is put into operation at the minimum frequency, in the adjusting process of the original cooling tower, before the frequencies of the two cooling towers are lower than the power frequency, if the actual opening of the bypass valve is smaller than the preset opening, the adjustment of the fan frequency of the cooling tower is stopped, and the current frequency is maintained to be operated; if the frequency of the two cooling towers is increased to the power frequency and the opening of the bypass valve is still increased, increasing the frequency of the chilled water pump;
after a new cooling tower is opened to carry out cooperative work by a preset working strategy, judging whether the frequencies of the two cooling towers reach the power frequency;
and if the frequencies of the two cooling towers reach the power frequency and the actual opening of the bypass valve is larger than the preset opening, increasing the current operating frequency of a chilled water pump of the air-conditioning system by a second preset threshold value, and continuously detecting the actual opening after the second preset duration is continued until the current operating frequency is increased to the power frequency.
4. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the air conditioning system optimization control method of any of claims 1-3.
5. A computer-readable storage medium having a computer program stored thereon, wherein the program is executed by a processor for implementing the air conditioning system optimization control method according to any one of claims 1-2.
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