Control method and device of air conditioning system, air conditioner and storage medium

Abstract

The application provides a control method and device of an air conditioning system, an air conditioner and a computer readable storage medium, the air conditioning system comprises a cold source device and a water source heat pump, the control method comprises: determining a target function relationship; wherein the target function relationship is used to represent the relationship between the energy consumption of the cold source device and / or the water source heat pump and a target parameter, and the target parameter is a parameter used to control the air conditioning system; according to the target function relationship, determining the parameter value of the target parameter corresponding to the minimum value of the energy consumption; and according to the parameter value of the target parameter, controlling the operation of the air conditioning system.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and more specifically, to a control method, apparatus, air conditioner, and storage medium for an air conditioning system. Background Technology

[0002] Energy is the material foundation for social and economic development, and also the material foundation for human survival and development. Sustained and rapid economic and social development cannot be achieved without a strong energy guarantee. With social development, people's demands for spatial comfort are gradually increasing, and the use of air conditioning is becoming more and more widespread. To create a resource-saving and environmentally friendly society, energy conservation in air conditioning systems is imperative. Therefore, how to achieve energy conservation in air conditioning systems has become a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides a control method, apparatus, air conditioner, and storage medium for an air conditioning system, which enables energy saving in the air conditioning system.

[0004] In a first aspect, a control method for an air conditioning system is provided, the air conditioning system comprising: a cooling source device and a water source heat pump, the method comprising: determining an objective function relationship; wherein the objective function relationship is used to characterize the relationship between the energy consumption of the cooling source device and / or the water source heat pump and a target parameter, the target parameter being a parameter used to control the air conditioning system; determining, based on the objective function relationship, the parameter value of the target parameter corresponding to the minimum energy consumption; and controlling the operation of the air conditioning system based on the parameter value of the target parameter.

[0005] In the above technical solution, a target function relationship is determined, which characterizes the relationship between the energy consumption of the cold source equipment and / or water source heat pump and the target parameters. The target parameters are parameters used to control the air conditioning system. Based on the above target function relationship, the parameter value of the target parameter corresponding to the minimum energy consumption is determined. Based on the parameter value of the target parameter, the operation of the air conditioning system is controlled. This ensures that when the air conditioning system operates at the parameter value of the target parameter, the energy consumption of the cold source equipment and / or water source heat pump in the air conditioning system can reach the minimum level, thereby helping to achieve energy saving of the air conditioning system.

[0006] In conjunction with the first aspect, in some possible implementations, the aforementioned cold source equipment includes a cooling tower and a chiller unit; the aforementioned objective function relationship includes a first functional relationship between the first total power of the chiller unit, the cooling tower, and the water source heat pump and the objective parameters; the aforementioned objective parameters include the operating frequency of the cooling tower fan and the set outlet water temperature of the cooling tower; determining the parameter value of the objective parameter corresponding to the minimum energy consumption based on the aforementioned objective function relationship includes determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum first total power based on the aforementioned first functional relationship; controlling the operation of the air conditioning system based on the parameter value of the aforementioned objective parameters includes controlling the cooling tower fan in the air conditioning system to operate at the fan operating frequency value corresponding to the minimum first total power, and controlling the set outlet water temperature of the cooling tower to the set outlet water temperature value corresponding to the minimum first total power.

[0007] In conjunction with the first aspect, in some possible implementations, after controlling the set outlet water temperature of the cooling tower to be the set outlet water temperature value corresponding to the minimum value of the first total power, the method further includes: detecting the actual outlet water temperature value of the cooling tower; and adjusting the opening degree of the regulating valve of the water source heat pump based on the deviation between the actual outlet water temperature value and the set outlet water temperature value.

[0008] In conjunction with the first aspect, in some possible implementations, determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power based on the first functional relationship includes: under preset first constraints, determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power based on the first functional relationship; wherein the first constraints include one or any combination of the following: the fan operating frequency value is greater than or equal to a first preset frequency value and less than or equal to a second preset frequency value; the set outlet water temperature value is greater than or equal to a first preset temperature value and less than or equal to a second preset temperature value.

[0009] In conjunction with the first aspect, in some possible implementations, the aforementioned air conditioning system further includes a rotary dehumidifier, and the aforementioned cold source equipment includes a chiller and a water pump; the aforementioned objective function relationship includes a second functional relationship between the second total power of the chiller, the water pump, and the water source heat pump and the objective parameters, and the aforementioned objective parameters include the set regeneration temperature and the set return air temperature of the rotary dehumidifier; determining the parameter value of the objective parameter corresponding to the minimum energy consumption based on the aforementioned objective function relationship includes determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum second total power based on the aforementioned second functional relationship; controlling the operation of the aforementioned air conditioning system based on the parameter value of the aforementioned objective parameters includes controlling the rotary dehumidifier in the aforementioned air conditioning system to operate at the set regeneration temperature value and the set return air temperature value corresponding to the minimum second total power.

[0010] In conjunction with the first aspect, in some possible implementations, determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power according to the second functional relationship includes: under a preset second constraint condition, determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power according to the second functional relationship.

[0011] The second constraint includes one or any combination of the following: the set regeneration temperature value is greater than or equal to the first preset regeneration temperature value and less than or equal to the second preset regeneration temperature value; the set return air temperature value is greater than or equal to the first preset return air temperature value and less than or equal to the second preset return air temperature value; the indoor temperature value is greater than or equal to the difference between the indoor temperature set value and the preset indoor temperature hysteresis set value and less than or equal to the sum of the indoor temperature set value and the indoor temperature hysteresis set value; the indoor humidity value is greater than or equal to the difference between the indoor humidity set value and the preset indoor humidity hysteresis set value and less than or equal to the sum of the indoor humidity set value and the indoor humidity hysteresis set value.

[0012] In conjunction with the first aspect, in some possible implementations, the aforementioned cold source equipment includes a chiller unit and a cooling tower. The aforementioned objective function relationship includes a third function relationship between the correction coefficient of the energy efficiency ratio of the chiller unit and the objective parameter. The larger the correction coefficient, the lower the energy consumption of the chiller unit. The aforementioned objective parameter includes the set outlet water temperature of the cooling tower. Determining the parameter value of the objective parameter corresponding to the minimum energy consumption based on the aforementioned objective function relationship includes: determining the set outlet water temperature value corresponding to the maximum value of the correction coefficient based on the aforementioned third function relationship, and using the determined set outlet water temperature value as the set outlet water temperature value corresponding to the minimum energy consumption. Controlling the operation of the air conditioning system based on the parameter value of the aforementioned objective parameter includes: controlling the set outlet water temperature of the cooling tower to the set outlet water temperature value corresponding to the maximum value of the correction coefficient.

[0013] In conjunction with the first aspect, in some possible implementations, the aforementioned cold source equipment includes a chiller unit and a cooling tower. The aforementioned objective function relationship includes a fourth functional relationship between the correction factor of the thermal coefficient of the aforementioned water source heat pump and the objective parameter. The larger the correction factor, the lower the energy consumption of the aforementioned water source heat pump. The aforementioned objective parameter includes the set outlet water temperature of the aforementioned cooling tower. Determining the parameter value of the objective parameter corresponding to the minimum energy consumption based on the aforementioned objective function relationship includes: determining the set outlet water temperature value corresponding to the maximum value of the aforementioned correction factor based on the aforementioned fourth functional relationship, and using the determined set outlet water temperature value as the set outlet water temperature value corresponding to the minimum energy consumption. Controlling the operation of the aforementioned air conditioning system based on the parameter value of the aforementioned objective parameter includes: controlling the set outlet water temperature of the aforementioned cooling tower to be the set outlet water temperature value corresponding to the maximum value of the aforementioned correction factor.

[0014] In conjunction with the first aspect, in some possible implementations, the air conditioning system further includes: a rotary dehumidifier; the cold source equipment includes: a chiller and a cooling tower, the chiller and the water source heat pump are respectively connected to the cooling tower, and the chiller and the water source heat pump are independently arranged so that the water source heat pump and the chiller are connected in parallel; the cooling water flowing out of the cooling tower is used to be transferred to the chiller and the water source heat pump, the water source heat pump is used to cool the received cooling water, and uses the heat released during cooling to regenerate the rotary dehumidifier, and the cooling water flowing through the water source heat pump and the cooling water flowing through the chiller are mixed and then flow into the cooling tower.

[0015] Secondly, a control device for an air conditioning system is provided. The device includes: a first determining module for determining an objective function relationship; wherein the objective function relationship characterizes the relationship between the energy consumption of the cold source equipment and / or the water source heat pump and a target parameter, and the target parameter is a parameter used to control the air conditioning system; a second determining module for determining the parameter value of the target parameter corresponding to the minimum energy consumption based on the objective function relationship; and a control module for controlling the operation of the air conditioning system based on the parameter value of the target parameter.

[0016] In conjunction with the second aspect, in some possible implementations, the cold source equipment includes a cooling tower and a chiller unit. The aforementioned objective function relationship includes a first functional relationship between the first total power of the chiller unit, the cooling tower, and the water source heat pump and the target parameters. The target parameters include the fan operating frequency of the cooling tower and the set outlet water temperature of the cooling tower. The second determining module is specifically used to determine the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power based on the aforementioned first functional relationship. The control module is specifically used to control the fan of the cooling tower in the air conditioning system to operate at the fan operating frequency value corresponding to the minimum value of the first total power, and to control the set outlet water temperature of the cooling tower to the set outlet water temperature value corresponding to the minimum value of the first total power.

[0017] In conjunction with the second aspect, in some possible implementations, the above-mentioned device further includes: an adjustment module, which is used to detect the actual outlet water temperature of the cooling tower after controlling the set outlet water temperature of the cooling tower to be the set outlet water temperature value corresponding to the minimum value of the first total power; and to adjust the opening degree of the regulating valve of the water source heat pump according to the deviation between the actual outlet water temperature value and the set outlet water temperature value.

[0018] In conjunction with the second aspect, in some possible implementations, the second determining module is specifically used to: under preset first constraints, determine the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power according to the first functional relationship; wherein the first constraints include one or any combination of the following: the fan operating frequency value is greater than or equal to the first preset frequency value and less than or equal to the second preset frequency value; the set outlet water temperature value is greater than or equal to the first preset temperature value and less than or equal to the second preset temperature value.

[0019] In conjunction with the second aspect, in some possible implementations, the aforementioned air conditioning system further includes a rotary dehumidifier, and the aforementioned cold source equipment includes a chiller and a water pump; the aforementioned objective function relationship includes a second function relationship between the second total power of the chiller, the water pump, and the water source heat pump and the objective parameters, and the aforementioned objective parameters include the set regeneration temperature and the set return air temperature of the rotary dehumidifier; the aforementioned second determining module is specifically used to: determine the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the aforementioned second total power according to the aforementioned second function relationship; the control module is specifically used to: control the aforementioned rotary dehumidifier in the aforementioned air conditioning system to operate at the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the aforementioned second total power.

[0020] In conjunction with the second aspect, in some possible implementations, the second determining module is specifically used to: determine the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power according to the aforementioned second functional relationship, including: under preset second constraints, determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power according to the aforementioned second functional relationship; wherein, the aforementioned second constraints include one of the following or any combination thereof: the indoor temperature value is greater than or equal to the difference between the indoor temperature set value and the preset indoor temperature hysteresis set value and is less than or equal to the sum of the aforementioned indoor temperature set value and the aforementioned indoor temperature hysteresis set value; the indoor humidity value is greater than or equal to the difference between the indoor humidity set value and the preset indoor humidity hysteresis set value and is less than or equal to the sum of the aforementioned indoor humidity set value and the aforementioned indoor humidity hysteresis set value; the set regeneration temperature value is greater than or equal to the first preset regeneration temperature value and is less than or equal to the second preset regeneration temperature value; the set return air temperature value is greater than or equal to the first preset return air temperature value and is less than or equal to the second preset return air temperature value.

[0021] In conjunction with the second aspect, in some possible implementations, the aforementioned cold source equipment includes a chiller unit and a cooling tower. The aforementioned objective function relationship includes a third function relationship between the correction coefficient of the energy efficiency ratio of the chiller unit and the objective parameter. The larger the correction coefficient, the lower the energy consumption of the chiller unit. The aforementioned objective parameter includes the set outlet water temperature of the cooling tower. The second determining module is specifically used to: determine the set outlet water temperature value corresponding to the maximum value of the correction coefficient based on the aforementioned third function relationship, and use the determined set outlet water temperature value as the set outlet water temperature value corresponding to the minimum energy consumption. The control module is specifically used to: control the set outlet water temperature of the cooling tower to be the set outlet water temperature value corresponding to the maximum value of the correction coefficient.

[0022] In conjunction with the second aspect, in some possible implementations, the aforementioned cold source equipment includes a chiller unit and a cooling tower. The aforementioned objective function relationship includes a fourth function relationship between the correction factor of the thermodynamic coefficient of the aforementioned water source heat pump and the objective parameter. The larger the correction factor, the lower the energy consumption of the aforementioned water source heat pump. The aforementioned objective parameter includes the set outlet water temperature of the aforementioned cooling tower. The second determining module is specifically used to: determine the set outlet water temperature value corresponding to the maximum value of the aforementioned correction factor according to the aforementioned fourth function relationship, and use the determined set outlet water temperature value as the set outlet water temperature value corresponding to the minimum value of the aforementioned energy consumption. The control module is specifically used to: control the set outlet water temperature of the aforementioned cooling tower to be the set outlet water temperature value corresponding to the maximum value of the aforementioned correction factor.

[0023] In conjunction with the second aspect, in some possible implementations, the air conditioning system further includes: a rotary dehumidifier; the aforementioned cold source equipment includes: a chiller unit and a cooling tower, the chiller unit and the water source heat pump are respectively connected to the cooling tower, and the chiller unit and the water source heat pump are independently arranged so that the water source heat pump and the chiller unit are connected in parallel; the cooling water flowing out of the cooling tower is used to be transmitted to the chiller unit and the water source heat pump, the water source heat pump is used to cool the received cooling water, and uses the heat released during cooling to regenerate the rotary dehumidifier, and the cooling water flowing through the water source heat pump and the cooling water flowing through the chiller unit are mixed and then flow into the cooling tower.

[0024] Thirdly, an air conditioner is provided, including a memory and a processor. The memory is used to store executable program code, and the processor is used to call and run the executable program code from the memory, causing the air conditioner to perform the methods described in the first aspect or any possible implementation thereof.

[0025] Fourthly, a computer program product is provided, comprising: computer program code, which, when run on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof.

[0026] Fifthly, a computer-readable storage medium is provided that stores computer program code, which, when executed on a computer, causes the computer to perform the methods described in the first aspect or any possible implementation thereof. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an air conditioning system provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of another air conditioning system provided in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the air handling process in the air conditioning system provided in the embodiments of this application;

[0030] Figure 4 This is a flowchart illustrating a control method for an air conditioning system provided in an embodiment of this application;

[0031] Figure 5 This is a schematic diagram illustrating the linkage control of a cooling tower and a water source heat pump, as provided in an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the operating conditions of the rotary dehumidifier air conditioning system without a precooler provided in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the operating conditions of the rotary dehumidifier air conditioning system with a precooler provided in the embodiments of this application;

[0034] Figure 8 This is a schematic diagram of the structure of the control device for the air conditioning system provided in the embodiments of this application;

[0035] Figure 9 This is a schematic diagram of the structure of the air conditioner provided in the embodiment of this application. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this specification clearer, the embodiments of this specification will be described in further detail below with reference to the accompanying drawings.

[0037] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this specification as detailed in the appended claims.

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this specification more comprehensive and complete, and to fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a full understanding of the embodiments described herein. However, those skilled in the art will recognize that the technical solutions described herein may be practiced with one or more of the specific details omitted, or other methods, components, apparatus, steps, etc., may be employed. In other instances, well-known technical solutions are not shown or described in detail to avoid obscuring various aspects of this specification.

[0039] Furthermore, the accompanying drawings are merely illustrative diagrams of this specification and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0040] This application provides a control method for an air conditioning system, applied to an air conditioner. By controlling the air conditioning system using this method, energy saving can be achieved. The air conditioning system involved in this embodiment is described below:

[0041] In an exemplary embodiment, a schematic diagram of the air conditioning system can be referred to. Figure 1 The system includes: a cooling tower 101, a cooling water pump 102, a water source heat pump 103, a chiller unit 104, a chilled water pump 105, a rotary dehumidifier 106, an aftercooler 107, a rotary heater 108, a heat meter 109, and an electric butterfly valve 110. The cooling tower 101, cooling water pump 102, chiller unit 104, and chilled water pump 105 can all be considered as cold source equipment. The rotary dehumidifier 106 includes a regeneration zone and a dehumidification zone. During dehumidification, the adsorption disc rotates slowly under the drive of the drive device. When the adsorption disc reaches saturation with water molecules in the dehumidification zone, it enters the regeneration zone where it undergoes desorption and regeneration by high-temperature air. This process repeats continuously, with dry air continuously delivered to the designated space after temperature regulation, achieving high-precision temperature and humidity control. The heat meter 109 is an instrument for calculating heat, and the electric butterfly valve 110 is used to adjust the flow rate or control the flow path.

[0042] Figure 1 In this configuration, chiller unit 104 is connected to cooling tower 101, and water source heat pump 103 is also connected to cooling tower 101. Chiller unit 104 and water source heat pump 103 are independently configured, allowing them to be connected in parallel. Cooling water flowing from cooling tower 101 can be transferred to both chiller unit 104 and water source heat pump 103. Upon receiving the cooling water from cooling tower 101, water source heat pump 103 can cool the water and provide the heat generated during cooling to rotary dehumidifier 106 for regeneration. Finally, the cooling water flowing through water source heat pump 103 and chiller unit 104 mix and flow back into cooling tower 101.

[0043] In related technologies, chiller units generate a significant amount of heat in their condensers during operation. This heat is ultimately dissipated into the surrounding environment through the cooling tower in the cooling water system, and heat recovery devices are generally not installed, resulting in this heat not being effectively utilized. Figure 1 In the illustrated embodiment, a portion of the cooling water from the cooling tower 101 is connected to the water source heat pump 103 for cooling, which is equivalent to recovering the condensation heat of the chiller unit 104. That is, in this embodiment, the water source heat pump 103 can recover the condensation heat generated during the operation of the chiller unit 104, and use this portion of condensation heat to regenerate the rotary dehumidifier 106. The cooling water cooled by the water source heat pump 103 and the cooling water treated by the chiller unit 104 are mixed and flow back to the cooling tower 101, which reduces the inlet water temperature of the cooling tower and reduces the energy consumption of the cooling tower fan.

[0044] In this embodiment, the heat required for the regeneration of the rotary dehumidifier 106 comes from the water source heat pump 103. The chiller unit 104 and the water source heat pump 103 are connected in parallel. When the air conditioning system is running, part of the cooling water supplied from the cooling tower 101 absorbs heat and rises in temperature through the condenser of the chiller unit 104, and part of it releases heat and cools down through the evaporator of the water source heat pump 103. The cooling water flowing out of the water source heat pump 103 and the cooling water flowing out of the chiller unit 104 are mixed and finally flow back to the cooling tower 101. By using the water source heat pump 103, the cooling water generated during refrigeration can be used as a heat source to regenerate the rotary dehumidifier 106. On the one hand, this reduces the energy consumption of the rotary dehumidifier 106 regeneration, and on the other hand, the water source heat pump 103 can also perform part of the function of the cooling tower 101. At this time, the selected heat dissipation capacity of the cooling tower = the heat dissipation capacity of the chiller unit - the heat recovered by the water source heat pump, which can reduce the configuration of the cooling tower.

[0045] In an exemplary embodiment, a schematic diagram of the air conditioning system can be referred to. Figure 2 ,and Figure 1 compared to, Figure 2 The air conditioning system also includes a precooler 201 installed before the rotary dehumidifier 106. Indoor air is cooled by the precooler 201 before entering the rotary dehumidifier 106.

[0046] exist Figure 1 The schematic diagram of the air handling process in the air conditioning system without a precooler 201 is shown below. Figure 3 As shown in diagram a—c′—o, hot and humid air a is first dehumidified by the rotary dehumidifier 106 under isenthalpic conditions, and then cooled to the supply air state point o by the aftercooler 107 under isohumid conditions. Because the temperature at the indoor return air state point a is high, the dehumidification efficiency is low, requiring a higher regeneration temperature and resulting in higher regeneration energy consumption. Furthermore, due to the large amount of adsorption heat generated during the rotary dehumidification adsorption process, the temperature at point c is high, requiring a large amount of cooling capacity from the aftercooler 107 after rotary dehumidification, leading to higher energy consumption of the chiller unit. Figure 2 In the air conditioning system shown, a precooler 201 is installed before the rotary dehumidifier 106, and its air handling process is as follows: Figure 3 As shown in diagram a-b-c-o, hot and humid air a first undergoes isohumidification cooling treatment in precooler 201 to state point b, then isoenthalpic dehumidification in rotary dehumidifier 106 to state point c, and finally isohumidification cooling in aftercooler 107 to supply air state point o. Since the higher the inlet temperature of rotary dehumidifier 106, the lower its dehumidification capacity, adding precooler 201 effectively improves its dehumidification capacity, reduces the temperature of the regeneration air side, and saves regeneration energy. Furthermore, precooler 201 often does not require a very low temperature; the chilled water from aftercooler 107 can be directly used as the chilled water inlet for precooler 201, further reducing the system's total energy consumption.

[0047] exist Figure 2 In the air conditioning system shown, by setting up a precooler to reduce the inlet temperature of the processed air, the dehumidification capacity of the rotary dehumidifier can be effectively improved. Under the same dehumidification capacity, the setting of the precooler reduces the regeneration temperature and regeneration energy consumption.

[0048] exist Figure 1 and Figure 2 In the air conditioning system shown, the use of a rotary dehumidifier allows for independent control of the temperature and humidity of the air supplied by the air conditioner. The moisture load of the air conditioning system can be borne by the rotary dehumidifier, while the sensible heat load can be borne by the high-temperature chilled water. Compared with traditional cooling and dehumidification, the chilled water outlet temperature of the computer room can be increased to 13°C, which is beneficial to improving the energy efficiency ratio of the chiller unit.

[0049] Figure 4 This is a schematic flowchart illustrating a control method for an air conditioning system provided in an embodiment of this application. The air conditioning system can be... Figure 1 The air conditioning system shown can also be Figure 2 The air conditioning system shown.

[0050] For example, such as Figure 4 As shown, the control method includes:

[0051] Step 401: Determine the objective function relationship.

[0052] Step 402: Determine the parameter values ​​of the target parameters corresponding to the minimum energy consumption based on the objective function relationship.

[0053] Step 403: Control the operation of the air conditioning system according to the target parameter values.

[0054] exist Figure 4 In the embodiment shown, when the air conditioning system is operating at the target parameter values, the energy consumption of the cold source equipment and / or water source heat pump in the air conditioning system can be minimized, thereby helping to achieve energy saving of the air conditioning system.

[0055] The following is about Figure 4 The specific implementation methods of each step in the illustrated embodiment will be explained below:

[0056] In step 401, the variable characterizing the energy consumption of the cold source equipment and / or water source heat pump can be used as the dependent variable, and the target parameter used to control the air conditioning system can be used as the independent variable. By collecting and learning data on the dependent and independent variables over a period of time, the functional relationship between them is obtained. Therefore, the functional relationship between the dependent and independent variables can be determined as the target functional relationship.

[0057] In an exemplary embodiment, power can be used as a variable to characterize the energy consumption of the cooling source equipment and the water source heat pump. The objective function relationship described above includes: Figure 1 Or, as shown in Figure 2, there is a first functional relationship between the first total power of the chiller unit 104, cooling tower 101, and water source heat pump 103 and target parameters, where the target parameters include the fan operating frequency of the cooling tower 101 and the set outlet water temperature of the cooling tower 101. In other words, the aforementioned first functional relationship is a functional relationship between the first total power of the chiller unit 104, cooling tower 101, and water source heat pump 103 and the fan operating frequency and set outlet water temperature of the cooling tower 101.

[0058] For example, the first functional relationship described above can be as follows:

[0059] P1=Pch+Php+Ptower=f(Ttower,out,Frefan)

[0060] Where P1 is the first total power, Pch is the power of the chiller unit, Php is the power of the water source heat pump, Ptower is the power of the cooling tower, Ttower,out is the set outlet water temperature of the cooling tower, and Frefan is the operating frequency of the cooling tower fan.

[0061] In an exemplary embodiment, power can be used as a variable to characterize the energy consumption of the cooling source equipment and the water source heat pump. The objective function relationship described above includes: Figure 1 or Figure 2 The diagram illustrates a second functional relationship between the total second power of the chiller unit 104, cooling water pump 102, chilled water pump 105, and water source heat pump 103, and target parameters. These target parameters include the set regeneration temperature and set return air temperature of the rotary dehumidifier 106. In other words, the aforementioned second functional relationship is a functional relationship between the total second power of the chiller unit 104, cooling water pump 102, chilled water pump 105, and water source heat pump 103, and the set regeneration temperature and set return air temperature of the rotary dehumidifier 106.

[0062] For example, the second functional relationship described above can be as follows:

[0063] P2=Pch+Ppump+Php=f(Theat,Tin)

[0064] Where P2 is the second total power, Pch is the power of the chiller unit, Php is the power of the water source heat pump, and Ppump is the power of the water pump. The power of the water pump can be the sum of the power of the cooling water pump and the chilled water pump. Theat is the set regeneration temperature of the rotary dehumidifier, and Tin is the set return air temperature of the rotary dehumidifier, which can be understood as the inlet temperature of the processed air of the rotary dehumidifier.

[0065] In an exemplary embodiment, the correction coefficient θc,tcooling of the chiller unit's energy efficiency ratio can be used as a variable to characterize the chiller unit's energy consumption. The larger θc,tcooling is, the lower the chiller unit's energy consumption. The aforementioned objective function relationship may include a third function relationship between θc,tcooling and the target parameter, which includes the set outlet water temperature Ttower,out of the cooling tower 101. That is, the aforementioned third function relationship is a function relationship between θc,tcooling and Ttower,out.

[0066] For example, the third functional relationship described above can be as follows:

[0067] θc,tcooling=a*Ttower,out 3 -b*Ttower,out 2 +c*(Ttower,out-d)

[0068] Wherein, θc,tcooling is the aforementioned correction coefficient, Ttower,out is the set outlet water temperature of the cooling tower, and a, b, c, and d are preset constants, the specific values ​​of which can be determined by those skilled in the art through experiments. For different air conditioning systems, the values ​​of a, b, c, and d may differ, and this embodiment does not impose specific limitations on them. The aforementioned correction coefficient can be understood as: the correction coefficient for the influence of the cooling tower outlet water temperature setpoint Ttower,out on the energy efficiency ratio (EER) of the chiller unit. The EER of the chiller unit characterizes the energy efficiency of the cold source and is inversely proportional to Pch; that is, the larger the EER, the lower the energy consumption of the chiller unit. If the aforementioned θc,tcooling is larger, the energy consumption of the chiller unit will be lower. The aforementioned θc,tcooling is used to correct the EER of the chiller unit; the larger θc,tcooling is, the higher the energy efficiency and the lower the energy consumption.

[0069] For example, if the values ​​of a, b, c, and d are: a = 0.00009139, b = 0.0084, c = 0.2285, and d = 4.5, then the corresponding relationship of the third function mentioned above can be as follows:

[0070] θc,tcooling=0.00009139Ttower,out 3 -0.0084Ttower,out 2 +0.2285(Ttower,out-4.5)

[0071] In an exemplary embodiment, the correction factor εeva of the thermal coefficient of the water source heat pump can be used as a variable to characterize the energy consumption of the water source heat pump, and the larger εeva is, the lower the energy consumption of the water source heat pump. The objective function relationship includes a fourth functional relationship between εeva and the objective parameter, which includes the set outlet water temperature Ttower,out of the cooling tower 101. That is, the above-mentioned fourth functional relationship is a functional relationship between εeva and Ttower,out.

[0072] For example, the fourth functional relationship described above can be as follows:

[0073] εeva=e*Ttower,out 2 +f*Ttower,out+g

[0074] Wherein, εeva is the aforementioned correction factor, Ttower,out is the set outlet water temperature of the cooling tower, and e, f, and g are preset constants, the specific values ​​of which can be determined by those skilled in the art through experiments. The values ​​of e, f, and g may differ for different air conditioning systems, and this embodiment does not impose specific limitations on them. εeva can be understood as a correction factor for the influence of the cooling tower outlet water temperature setpoint Ttower,out on the coefficient of performance (COP) of the water source heat pump. The higher the COP of the water source heat pump, the larger the corresponding COP, and the better the heat exchange effect. If the aforementioned εeva is larger, the energy consumption of the water source heat pump will be lower. The aforementioned εeva is used to correct the COP of the water source heat pump; a larger εeva indicates higher energy efficiency and lower energy consumption.

[0075] For example, if the values ​​of e, f, and g are: e = 0.0004, f = 0.0068, and g = 0.9277, then the corresponding fourth function relationship mentioned above can be as follows:

[0076] εeva=0.0004Ttower,out 2 +0.0068Ttower,out+0.9277

[0077] In step 402, the minimum energy consumption can be calculated based on the objective function relationship, and then the parameter value of the objective parameter corresponding to the minimum energy consumption can be determined.

[0078] In an exemplary embodiment, when the objective function relationship includes the above-mentioned P1 = Pch + Php + Ptower = f(Ttower,out,Frefan), the parameter values ​​of the objective parameters corresponding to the minimum energy consumption include: the cooling tower fan operating frequency value Frefan and the cooling tower set outlet water temperature value Ttower,out, i.e., the outlet water temperature setpoint. The implementation of step 402 may include: determining Frefan and Ttower,out corresponding to the minimum value of the first total power P1 based on P1 = Pch + Php + Ptower = f(Ttower,out,Frefan). Specifically, the minimum value of P1 can be calculated first based on the function relationship P1 = f(Ttower,out,Frefan), and then the minimum value of P1 can be substituted into the above-mentioned first function relationship to calculate the fan operating frequency value Frefan and the outlet water temperature setpoint Ttower,out corresponding to the minimum value of P1.

[0079] In an exemplary embodiment, determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of P1 based on P1 = f(Ttower,out,Frefan) includes: under a preset first constraint condition, determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of P1 based on P1 = f(Ttower,out,Frefan). The first constraint condition may include one or more of the following conditions:

[0080] Frefan LSP ≤Frefan≤Frefan USP

[0081] Ttower,out LsP ≤Ttower,out≤Ttower,out USP

[0082] Frefan LSP The preset lower limit value of the wind turbine operating frequency, i.e., the first preset frequency value, is Frefan. USP The second preset frequency value is the upper limit of the wind turbine's operating frequency. (Ttower,out) LSP To set the preset lower limit value of the outlet water temperature, i.e., the first preset temperature value, Ttower,out USP This is to set the upper limit of the outlet water temperature, i.e., the second preset temperature value. (The above refers to Frefan.) LSP Frefan USP Ttower,out LSP Ttower,out USP This can be set by those skilled in the art according to actual needs, and this embodiment does not impose specific limitations on it. Under the preset first constraint, the Frefan corresponding to the minimum value of P1 is greater than or equal to the aforementioned Frefan. LSP And less than or equal to the Frefan mentioned above USP Under the preset first constraint, the minimum value of P1 corresponding to Ttower,out is greater than or equal to the aforementioned Ttower,out. LSP And less than or equal to the above Ttower,out USP .

[0083] For example, it can be done in Frefan LSP ≤Frefan≤Frefan USP And Ttower,out LSP ≤Ttower,out≤Ttower,out USP The minimum value of P1 is calculated within the range, thereby determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of P1.

[0084] In this embodiment, by combining the first constraint condition and the first functional relationship, it is beneficial for the cooling tower to obtain a suitable fan operating frequency value and a set outlet water temperature value, so as to reduce the system energy consumption to a low level and achieve system energy saving.

[0085] In an exemplary embodiment, when the objective function relationship includes the above-mentioned P2 = Pch + Ppump + Php = f(Theat,Tin), the parameter values ​​of the objective parameters corresponding to the minimum energy consumption include: the set regeneration temperature value and the set return air temperature value of the rotary dehumidifier. The implementation of step 402 may include: determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum second total power based on P2 = Pch + Ppump + Php = f(Theat,Tin). Specifically, the minimum value of P2 can be calculated first based on the function relationship P2 = f(Theat,Tin), and then the minimum value of P2 can be substituted into the above-mentioned second function relationship to calculate the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of P2.

[0086] In an exemplary embodiment, determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of P2 based on the second functional relationship includes: under preset second constraint conditions, determining the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power based on the second functional relationship. The second constraint conditions may include one or more of the following conditions:

[0087]

[0088] RHroom,set-σ≤RHroom≤RHroom,set+σ

[0089] T heat,min ≤T heat ≤T heat,max

[0090] T in,min ≤T in ≤T in,max

[0091] Where Troom is the indoor temperature value, which can be understood as the actual indoor temperature, and Troom,set is the indoor temperature setting value. RHroom is the preset indoor temperature hysteresis setting, which can be understood as the actual indoor temperature value. RHroom,set is the indoor humidity setting, and σ is the preset indoor humidity hysteresis setting. T heat To set the regeneration temperature, T heat,min and T heat,maxThese are the preset upper and lower limits for the regeneration temperature, respectively, i.e., T. heat,min The first preset regeneration temperature value, T heat,max This is the second preset regeneration temperature value. (T) in To set the return air temperature, T in,min and T in,max These are the preset upper and lower limits for the return air temperature, respectively, i.e., T. in,min The first preset return air temperature value, T in, This is the second preset return air temperature value. (The above...) σ, T heat,min T heat,max T in,min T in,max All settings can be configured by those skilled in the art according to actual needs; this embodiment does not limit their specific size. Under the preset second constraint, the set regeneration temperature value corresponding to the minimum value of the determined second total power is greater than or equal to the aforementioned T. heat,min And less than or equal to the above T heat,max Under the preset second constraint, the minimum value of P2 corresponds to a set return air temperature value that is greater than or equal to the aforementioned T. in,min And less than or equal to the above T in,max .

[0092] Understandably, T in The set return air temperature for a rotary dehumidifier, i.e., the inlet temperature of the treated air, is generally the indoor temperature measured by an indoor temperature sensor. Troom and RHroom are the actual indoor temperature and humidity values. Therefore, the inequality mentioned above regarding Troom and RHroom can also be understood as relating Troom and RHroom. in The limiting conditions or conditions for T in The constraints.

[0093] For example, the second constraint may include: T heat,min ≤T heat ≤T heat,max and T in,min ≤T in ≤T in,max Therefore, in this embodiment, it is possible to... heat,min ≤T heat ≤T heat,max T in,min ≤T in ≤T in,max The minimum value of P2 is calculated within the range, thereby determining the set regeneration temperature value and the set processing air inlet temperature corresponding to the minimum value of the second total power.

[0094] In this embodiment, by combining the second constraint and the second function relationship, it is beneficial to obtain a suitable fan operating frequency value and a set outlet water temperature value for the rotary dehumidifier, so as to reduce the system energy consumption to a low level and achieve system energy saving.

[0095] In an exemplary embodiment, when the objective function relationship includes the above θc,tcooling=a*Ttower,out 3 -b*Ttower,out 2 When +c*(Ttower,out-d), the target parameter values ​​corresponding to the minimum energy consumption include: the set outlet water temperature of the cooling tower. The implementation of step 402 above can include: based on θc,tcooling=a*Ttower,out 3 -b*Ttower,out 2 +c*(Ttower,out-d) determines the set outlet water temperature value corresponding to the maximum value of θc,tcooling, and uses the determined set outlet water temperature value as the set outlet water temperature value corresponding to the minimum energy consumption.

[0096] Specifically, we can first consider the following functional relationship.

[0097] θc,tcooling=a*Ttower,out 3 -b*Ttower,out 2 +c*(Ttower,out-d)

[0098] Calculate the minimum value of θc,tcooling, and then substitute the minimum value of θc,tcooling into the above function relationship to calculate the set outlet water temperature value corresponding to the minimum value of θc,tcooling.

[0099] In an exemplary embodiment, when the objective function relation includes the above εeva=e*Ttower,out 2 When +f*Ttower,out+g, the target parameter values ​​corresponding to the minimum energy consumption include: the set outlet water temperature of the cooling tower. The implementation of step 402 above can include: based on εeva=e*Ttower,out 2 +f*Ttower,out+g, determines the set outlet water temperature corresponding to the maximum value of εeva, and uses this determined set outlet water temperature as the set outlet water temperature corresponding to the minimum energy consumption. Specifically, this can be done by first determining εeva = e*Ttower,out 2The function +f*Ttower,out+g is used to calculate the minimum value of εeva. Then, the minimum value of εeva is substituted into the function to calculate the set outlet water temperature value corresponding to the minimum value of εeva.

[0100] In step 403, the operation of relevant equipment in the air conditioning system is controlled according to the parameter value of the target parameter, that is, the relevant equipment in the air conditioning system operates according to the parameter value of the target parameter.

[0101] In an exemplary embodiment, when the minimum value of P1 is determined in step 402 according to the first functional relationship, the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of P1 can be controlled in step 403 to operate the cooling tower fan in the air conditioning system at the fan operating frequency value corresponding to the minimum value of P1, and the set outlet water temperature of the cooling tower can be controlled to be the set outlet water temperature value corresponding to the minimum value of P1.

[0102] In an exemplary embodiment, after controlling the set outlet water temperature of the cooling tower to the minimum value corresponding to P1, the method may further include: detecting the actual outlet water temperature T1 of the cooling tower; and adjusting the opening of the regulating valve of the water source heat pump based on the deviation between T1 and the set outlet water temperature value. For example, when T1 is lower than the set outlet water temperature value, the opening of the regulating valve of the water source heat pump can be increased. In this case, the larger the deviation between T1 and the set outlet water temperature value, the greater the increase in the opening of the regulating valve. When T1 is higher than the set outlet water temperature value, the opening of the regulating valve of the water source heat pump can be decreased. In this case, the larger the deviation between T1 and the set outlet water temperature value, the greater the decrease in the opening of the regulating valve.

[0103] In this embodiment, considering that the lower the cooling tower outlet water temperature setpoint, the lower the energy consumption of the chiller unit, and the higher the operating frequency of the cooling tower fan, a suitable cooling tower outlet water temperature setpoint is generally considered to be. The higher the cooling tower outlet water temperature setpoint, the higher the energy consumption of the chiller unit, and the lower the corresponding operating frequency of the cooling tower fan. Therefore, a suitable cooling tower outlet water temperature setpoint is an important parameter for reducing the total energy consumption of the cold source system. For a water source heat pump operating in parallel with a chiller unit, the larger the opening of the regulating valve of the water source heat pump, the higher the cooling water flow through the water source heat pump, and the better the regeneration effect of the dehumidifier impeller. However, this also leads to a higher inlet water temperature for the cooling tower. In this case, to reduce the outlet water temperature of the cooling tower, the operating frequency of the cooling tower fan needs to be increased. Conversely, the smaller the opening of the regulating valve of the water source heat pump, the worse the regeneration effect of the dehumidifier impeller, but the lower the inlet water temperature of the cooling tower, allowing for a more appropriate reduction in the operating frequency of the cooling tower fan. Therefore, in this embodiment, by controlling the cooling tower fan in the air conditioning system to operate at the fan operating frequency value corresponding to the minimum value of the first total power, and controlling the set outlet water temperature of the cooling tower to the set outlet water temperature value corresponding to the minimum value of the first total power, the energy consumption of the system can be minimized, achieving a better energy-saving effect.

[0104] In an exemplary embodiment, a schematic diagram illustrating the coordinated control of the cooling tower and the water source heat pump can be found in [reference needed]. Figure 5 .

[0105] For the cooling tower side, a suitable setpoint outlet water temperature can be determined based on the actual air conditioning load and measured outdoor meteorological parameters. This setpoint outlet water temperature, determined by the air conditioning load and outdoor meteorological parameters, ensures that the total power of the cooling source equipment is minimized. The cooling tower fan operating frequency is adjusted using a proportional-integral-differential (PID) controller based on the actual and setpoint outlet water temperatures. For the water source heat pump side, the setpoint outlet water temperature of the water source heat pump is determined based on the actual outlet water temperature (i.e., the inlet water temperature) and the setpoint temperature. The opening of the cooling regulating valve of the water source heat pump is then adjusted using a PID controller based on the measured and setpoint outlet water temperatures. The cooling tower inlet water temperature is obtained by mixing the water from the water source heat pump and the chiller unit, thus forming a closed-loop feedback control.

[0106] In an exemplary embodiment, when the set regeneration temperature value and set return air temperature value corresponding to the minimum value of P2 are determined according to the second functional relationship in step 402, the rotary dehumidifier in the air conditioning system can be controlled to operate at the set regeneration temperature value and set return air temperature value corresponding to the minimum value of P2 in step 403.

[0107] In this embodiment, considering that the hot and humid air in the air conditioning system is first dehumidified by a rotary dehumidifier at enthalpy, and then cooled to the supply air state point by a cooler at humidity, the high inlet air temperature results in low dehumidification efficiency and requires a high regeneration temperature, leading to high regeneration energy consumption. Furthermore, the rotary dehumidifier releases a large amount of adsorption heat during the adsorption process, increasing the cooling capacity required by the cooler and thus increasing the cooling capacity of the chiller unit. Therefore, this embodiment optimizes the control of the rotary dehumidifier, controlling it to operate at the set regeneration temperature and set return air temperature corresponding to the minimum value of the second total power. This optimization is achieved by setting the regeneration temperature T... heat And the air inlet temperature, i.e., the return air temperature T. in This is beneficial for improving the dehumidification efficiency of the rotary dehumidifier while reducing the energy consumption of the chiller unit.

[0108] In this embodiment, the air conditioning system can be Figure 2The air conditioning system shown can optimize the control of the set regeneration temperature and set return air temperature of the rotary dehumidifier in the air conditioning system with added precooler 201, so as to improve the dehumidification efficiency of the rotary dehumidifier while reducing the energy consumption of the chiller unit.

[0109] In an exemplary embodiment, when the set outlet water temperature value corresponding to the maximum value of θc,tcooling is determined according to the third functional relationship in step 402, and the determined set outlet water temperature value is used as the set outlet water temperature value corresponding to the minimum energy consumption, the set outlet water temperature of the cooling tower in the air conditioning system can be controlled to be the set outlet water temperature value corresponding to the maximum value of θc,tcooling in step 403.

[0110] In this embodiment, considering that the EER of the chiller unit characterizes the energy efficiency of the cooling source and is inversely proportional to the power Pc□ of the chiller unit, that is, the larger the EER, the lower the energy consumption of the cooling source. According to the third function relationship, such as the relationship between θc and tcooling mentioned above, ensuring that this correction coefficient is as large as possible can minimize the energy consumption of the cooling source, thereby contributing to system energy saving.

[0111] In an exemplary embodiment, when the set outlet water temperature value corresponding to the maximum value of εeva is determined according to the fourth function relationship in step 402, and the determined set outlet water temperature value is used as the set outlet water temperature value corresponding to the minimum energy consumption, the set outlet water temperature of the cooling tower in the air conditioning system can be controlled to be the set outlet water temperature value corresponding to the maximum value of εeva in step 403.

[0112] In this embodiment, considering that the higher the set outlet water temperature of the cooling tower, the higher the COP of the water source heat pump, the larger the corresponding thermal coefficient, and the better the heat exchange effect, the fourth function relationship, such as the above-mentioned εeva relationship, can be used to ensure that εeva is as large as possible in order to determine the appropriate set outlet water temperature of the cooling tower, ensure the highest energy efficiency of the water source heat pump, and thus help the system save energy.

[0113] In this embodiment, the air conditioning system includes a rotary dehumidifier. An air conditioning system with a rotary dehumidifier is more energy-efficient than one without. (See also...) Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the operating points of a rotary dehumidifier air conditioning system without a precooler. Figure 7 This is a schematic diagram of the operating conditions of a rotary dehumidifier air conditioning system equipped with a precooler.

[0114] like Figure 6 As shown, assuming the chiller unit's outlet water temperature is 13 degrees Celsius, to improve the chiller unit's operating efficiency, the outlet water temperature can also be referred to as the supply water temperature. 24000m 3The airflow, after being processed by the rotary dehumidifier, results in an outlet air temperature of 19 degrees Celsius (dry bulb temperature) and 19 degrees Celsius (wet bulb temperature) at the dehumidification terminal. 60000m 3 After the airflow is cooled by the surface cooler, the outlet air temperature at the cooling terminal is 20 degrees Celsius (dry bulb temperature) and 18.4 degrees Celsius (wet bulb temperature). The surface cooler does not perform dehumidification. The air from the dehumidification terminal and the air from the cooling terminal are then mixed and sent into the room. The mixed air temperature is 20 degrees Celsius (dry bulb temperature) and below 18.4 degrees Celsius (wet bulb temperature). Figure 6 In this system, the chilled water temperature difference equals the chiller return water temperature of 20℃ minus the chiller inlet water temperature of 13℃, totaling 7℃. However, in traditional air conditioning systems, the chilled water temperature difference is typically 5℃. Therefore, Figure 6 In the air conditioning system shown, the water pump can operate with a large temperature difference to achieve energy-saving effects.

[0115] like Figure 7 As shown, assuming the chiller's outlet water temperature is 13 degrees Celsius, this allows for higher energy efficiency. When providing 24000m³ / h... 3 At the specified airflow rate, the temperature difference between the two coolers before and after the rotary dehumidifier is: pre-cooler outlet water temperature 21℃ - post-cooler inlet water temperature 13℃ = 21 - 13 = 8℃. 66000m 3 The chilled water temperature difference at the airflow control terminal is: lower surface cooler outlet water temperature - aftercooler inlet water temperature = 18 - 13 = 5℃. After these two portions of chilled water return, the temperature upon returning to the chiller unit is 20℃, meaning the return water temperature in the chiller room is 20℃. Therefore, the chilled water temperature difference = chiller unit return water temperature 20℃ - chiller unit inlet water temperature 13℃ = 7℃. In traditional air conditioning systems, the chilled water temperature difference is typically 5℃. Therefore... Figure 7 In the air conditioning system shown, the water pump can operate with a large temperature difference to achieve energy-saving effects.

[0116] In an exemplary embodiment, the power consumption and energy efficiency of the refrigeration system can be verified by comparing the power consumption and energy efficiency of the refrigeration system under two operating conditions: chilled water supply / return temperatures of 10 / 17°C and 13 / 20°C. Figure 1 and 2 The actual energy-saving effect of the air conditioning system shown is calculated and the results are shown in Table 1.

[0117] Table 1

[0118]

[0119]

[0120] Operating condition 1 can be for an air conditioning system without heat recovery, while operating condition 2 can be for an air conditioning system with heat recovery. An air conditioning system with heat recovery can be... Figure 1 or Figure 2The air conditioning system shown is a parallel configuration of a water source heat pump and a chiller unit. The water source heat pump recovers the heat released by the chiller unit to regenerate the rotary dehumidifier. Comparing two operating conditions with chilled water supply / return temperatures of 10 / 17℃ and 13 / 20℃, it can be seen that the total power consumption of the main unit can be reduced by 14.24%, the COP of the main unit is increased by 16.57%, and the annual energy efficiency of the chiller room is improved by 13.84%. Therefore, Figure 1 and Figure 2 The rotary dehumidifier air conditioning system that uses heat recovery can achieve good energy-saving effects.

[0121] In this embodiment, a water source heat pump recovers the heat released by the chiller unit to regenerate the rotary dehumidifier. The water source heat pump functions as part of the cooling tower, reducing the need for a separate cooling tower. The rotary dehumidification method allows for independent control of the temperature and humidity of the air conditioning supply air. Compared to traditional cooling dehumidification, the chilled water outlet temperature in the computer room can be increased by 13°C, improving the chiller unit's COP. A cooler is installed before the rotary dehumidifier, lowering its regeneration temperature and reducing the cooling capacity requirement of the cooler after the dehumidifier, thereby reducing the system's regeneration air heating energy consumption and the recooling energy consumption of the processed air. The chiller unit and water source heat pump operate in parallel. During joint operation, controlling the cooling tower fan operating frequency and the cooling regulating valve opening of the water source heat pump ensures heat balance while improving the system's combined operating energy efficiency. For air conditioning systems with an added pre-cooler, optimizing the regeneration temperature and return air temperature settings improves the rotary dehumidification efficiency while reducing the chiller unit's energy consumption.

[0122] Figure 8 This is a schematic diagram of the structure of a control device for an air conditioning system provided in an embodiment of this application.

[0123] For example, such as Figure 8 As shown, the device includes: a first determining module 801, used to determine an objective function relationship, which characterizes the relationship between the energy consumption of the aforementioned cold source equipment and / or the aforementioned water source heat pump and the objective parameter, wherein the objective parameter is a parameter used to control the aforementioned air conditioning system; a second determining module 802, used to determine the parameter value of the objective parameter corresponding to the minimum value of the aforementioned energy consumption based on the aforementioned objective function relationship; and a control module 803, used to control the operation of the aforementioned air conditioning system based on the parameter value of the aforementioned objective parameter.

[0124] It is not difficult to see that this embodiment is a device embodiment corresponding to the method embodiment described above. The relevant technical details and effects mentioned in the method embodiment above are still valid in this embodiment, and will not be repeated here to avoid repetition.

[0125] Figure 9 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this application.

[0126] For example, such as Figure 9 As shown, the air conditioner includes a memory 901 and a processor 902. The memory 901 stores executable program code, and the processor 902 is used to call and execute the executable program code to perform a control method for an air conditioning system.

[0127] This embodiment can divide the air conditioner into functional modules according to the above method example. For example, each module can correspond to a separate function module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0128] When each functional module is divided according to its corresponding function, the air conditioner may include: a first determining module, a second determining module, a control module, etc. It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0129] The air conditioner provided in this embodiment is used to execute the control method of the air conditioning system described above, and therefore can achieve the same effect as the above implementation method.

[0130] When using an integrated unit, the air conditioner may include a processing module and a storage module. The processing module is used to control and manage the operation of the air conditioner. The storage module is used to support the air conditioner in executing program code and data.

[0131] The processing module may be a processor or a controller, which can implement or execute various exemplary logic blocks, modules, and circuits as disclosed in this application. The processor may also be a combination of computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and microprocessors, etc., and the storage module may be a memory.

[0132] This embodiment also provides a computer-readable storage medium storing computer program code. When the computer program code is run on a computer, the computer executes the above-described related method steps to implement a control method for an air conditioning system in the above embodiment.

[0133] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned related steps to implement a control method for an air conditioning system as described in the above embodiment.

[0134] In addition, the air conditioner provided in the embodiments of this application may be a component or module. The air conditioner may include a connected processor and a memory. The memory is used to store instructions. When the air conditioner is running, the processor may call and execute the instructions to make the chip execute a control method of an air conditioning system in the above embodiments.

[0135] In this embodiment, the air conditioner, computer-readable storage medium, computer program product or chip are all used to execute the corresponding methods provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0136] Through the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0137] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0138] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When these computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this specification are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted through a computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The aforementioned available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., Digital Versatile Discs (DVDs)), or semiconductor media (e.g., Solid State Disks (SSDs)).

[0139] It should be noted that the above description describes specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims may be performed in a different order than that shown in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0140] The above description is merely a specific embodiment of this specification, but the scope of protection of this specification is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this specification should be included within the scope of protection of this specification. Therefore, equivalent variations made in accordance with the claims of this specification are still within the scope of this specification.

Claims

1. A control method for an air conditioning system, characterized in that, The air conditioning system includes: a cooling source device and a water source heat pump; the method includes: Determine the objective function relationship; wherein the objective function relationship is used to characterize the relationship between the energy consumption of the cold source equipment and / or the water source heat pump and the target parameters, and the target parameters are parameters used to control the air conditioning system; Based on the objective function relationship, determine the parameter values ​​of the objective parameters corresponding to the minimum energy consumption; and, The operation of the air conditioning system is controlled according to the parameter values ​​of the target parameters; The cold source equipment includes a cooling tower and a chiller unit. The chiller unit and the water source heat pump are respectively connected to the cooling tower, and the chiller unit and the water source heat pump are set independently so that the water source heat pump and the chiller unit are connected in parallel. The objective function relationship includes a first function relationship between the first total power of the chiller unit, the cooling tower and the water source heat pump and the objective parameters. The objective parameters include the fan operating frequency of the cooling tower and the set outlet water temperature of the cooling tower. The step of determining the parameter values ​​of the target parameters corresponding to the minimum energy consumption based on the target function relationship includes: Based on the first functional relationship, determine the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power; Controlling the operation of the air conditioning system based on the parameter value of the target parameter includes: The fan of the cooling tower in the air conditioning system is controlled to operate at the fan operating frequency value corresponding to the minimum value of the first total power, and the set outlet water temperature of the cooling tower is controlled to be the set outlet water temperature value corresponding to the minimum value of the first total power.

2. The control method for the air conditioning system according to claim 1, characterized in that, After controlling the set outlet water temperature of the cooling tower to be the set outlet water temperature value corresponding to the minimum value of the first total power, the method further includes: The actual outlet water temperature of the cooling tower is detected; and, The opening degree of the regulating valve of the water source heat pump is adjusted according to the deviation between the actual outlet water temperature value and the set outlet water temperature value.

3. The control method for the air conditioning system according to claim 1, wherein determining the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power based on the first functional relationship includes: Under the preset first constraint conditions, the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power are determined according to the first functional relationship. The first constraint includes one or any combination of the following: The operating frequency value of the fan is greater than or equal to the first preset frequency value and less than or equal to the second preset frequency value; The set outlet water temperature value is greater than or equal to the first preset temperature value and less than or equal to the second preset temperature value.

4. The control method for an air conditioning system according to claim 1, characterized in that, The air conditioning system also includes a rotary dehumidifier, and the cold source equipment also includes a water pump; the objective function relationship also includes: a second function relationship between the second total power of the chiller unit, the water pump and the water source heat pump and the objective parameters, and the objective parameters also include: the set regeneration temperature and the set return air temperature of the rotary dehumidifier; The step of determining the parameter values ​​of the target parameters corresponding to the minimum energy consumption based on the target function relationship further includes: Based on the second functional relationship, determine the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power; The step of controlling the operation of the air conditioning system according to the parameter value of the target parameter further includes: The rotary dehumidifier in the air conditioning system is controlled to operate at the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power.

5. The control method for the air conditioning system according to claim 4, characterized in that, The step of determining the set regeneration temperature value and set return air temperature value corresponding to the minimum value of the second total power based on the second functional relationship includes: Under the preset second constraint conditions, the set regeneration temperature value and the set return air temperature value corresponding to the minimum value of the second total power are determined according to the second functional relationship. The second constraint includes one or any combination of the following: The set regeneration temperature value is greater than or equal to the first preset regeneration temperature value and less than or equal to the second preset regeneration temperature value; The set return air temperature value is greater than or equal to the first preset return air temperature value and less than or equal to the second preset return air temperature value; The indoor temperature value is greater than or equal to the difference between the indoor temperature setpoint and the preset indoor temperature hysteresis setpoint, and less than or equal to the sum of the indoor temperature setpoint and the indoor temperature hysteresis setpoint. The indoor humidity value is greater than or equal to the difference between the indoor humidity setting value and the preset indoor humidity hysteresis setting value, and less than or equal to the sum of the indoor humidity setting value and the indoor humidity hysteresis setting value.

6. The control method for an air conditioning system according to claim 1, characterized in that, The objective function relationship also includes: a third function relationship between the correction coefficient of the energy efficiency ratio of the chiller unit and the objective parameter. The larger the correction coefficient, the lower the energy consumption of the chiller unit. The objective parameter also includes: the set outlet water temperature of the cooling tower. The step of determining the parameter values ​​of the target parameters corresponding to the minimum energy consumption based on the target function relationship further includes: Based on the third functional relationship, the set outlet water temperature value corresponding to the maximum value of the correction coefficient is determined, and the determined set outlet water temperature value is used as the set outlet water temperature value corresponding to the minimum value of energy consumption. The step of controlling the operation of the air conditioning system according to the parameter value of the target parameter further includes: The set outlet water temperature of the cooling tower is controlled to be the set outlet water temperature value corresponding to the maximum value of the correction coefficient.

7. The control method for an air conditioning system according to claim 1, characterized in that, The objective function relationship also includes: a fourth function relationship between the correction factor of the thermodynamic coefficient of the water source heat pump and the objective parameter. The larger the correction factor, the lower the energy consumption of the water source heat pump. The objective parameter also includes: the set outlet water temperature of the cooling tower. The step of determining the parameter values ​​of the target parameters corresponding to the minimum energy consumption based on the target function relationship further includes: Based on the fourth functional relationship, the set outlet water temperature value corresponding to the maximum value of the correction factor is determined, and the determined set outlet water temperature value is used as the set outlet water temperature value corresponding to the minimum value of energy consumption. The step of controlling the operation of the air conditioning system according to the parameter value of the target parameter further includes: The set outlet water temperature of the cooling tower is controlled to be the set outlet water temperature value corresponding to the maximum value of the correction factor.

8. The control method for an air conditioning system according to any one of claims 1 to 7, characterized in that, The air conditioning system also includes: a rotary dehumidifier; The cooling water flowing out of the cooling tower is used to transfer to the chiller and the water source heat pump. The water source heat pump is used to cool the received cooling water and use the heat released during cooling to regenerate the rotary dehumidifier. The cooling water flowing through the water source heat pump and the cooling water flowing through the chiller are mixed and then flow into the cooling tower.

9. A control device for an air conditioning system, characterized in that, The air conditioning system includes: a cooling source device and a water source heat pump; the device includes: The first determining module is used to determine the objective function relationship; wherein the objective function relationship is used to characterize the relationship between the energy consumption of the cold source equipment and / or the water source heat pump and the objective parameters, and the objective parameters are parameters used to control the air conditioning system; The second determining module is used to determine the parameter value of the target parameter corresponding to the minimum energy consumption based on the target function relationship. The control module is used to control the operation of the air conditioning system according to the parameter values ​​of the target parameters; The cold source equipment includes a cooling tower and a chiller unit. The chiller unit and the water source heat pump are respectively connected to the cooling tower, and the chiller unit and the water source heat pump are set independently so that the water source heat pump and the chiller unit are connected in parallel. The objective function relationship includes a first function relationship between the first total power of the chiller unit, the cooling tower and the water source heat pump and the objective parameters. The objective parameters include the fan operating frequency of the cooling tower and the set outlet water temperature of the cooling tower. The second determining module is specifically used to determine the fan operating frequency value and the set outlet water temperature value corresponding to the minimum value of the first total power based on the first functional relationship; The control module is specifically used to control the fan of the cooling tower in the air conditioning system to operate at the fan operating frequency value corresponding to the minimum value of the first total power, and to control the set outlet water temperature of the cooling tower to the set outlet water temperature value corresponding to the minimum value of the first total power.

10. An air conditioner, characterized in that, The air conditioner includes: Memory, used to store executable program code; A processor is configured to call and run the executable program code from the memory, causing the air conditioner to perform the method as described in any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed, implements the method as described in any one of claims 1 to 8.

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