Air compressor waste heat recovery cooling and heating load control method and system and storage medium

Abstract

The invention relates to the technical field of waste heat recovery and comprehensive utilization, in particular to an air compressor waste heat recovery cooling and heating load control method and system and a storage medium. According to the temperature data, the heat pump load is adjusted; obtaining a cooling water temperature trend of the air compressor; according to the air compressor cooling water temperature trend, whether the air compressor cooling water temperature exceeds an early warning value and continues to rise or not is judged; when it is judged that the temperature of the cooling water of the air compressor exceeds the early warning value and continues to rise, the opening degree of a three-way valve is adjusted according to the trend of the temperature of the cooling water of the air compressor; and adjusting the rotating speed of a cooling tower fan according to the temperature trend of the cooling water of the air compressor. Through cooperative regulation and control of the heat pump and the cooling tower, it can be ensured that the temperature of the cooling water is always stabilized in the optimal working interval, and the waste heat utilization rate is maximized on the premise that the operation stability of the air compressor system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery and comprehensive utilization, and in particular to a method, system and storage medium for controlling cooling and heating loads of waste heat recovery from an air compressor. Background Art

[0002] In industrial production, air compressors, as key air source equipment, are widely used in various fields. However, air compressors generate a large amount of heat during operation. In traditional cooling systems, this heat is typically discharged directly into the environment through cooling towers, leaving it unused. This results in significant energy waste and reduces the resource utilization of the air compressor. With rising energy costs and increasing environmental protection requirements, effectively recovering and utilizing waste heat from air compressor cooling water has become a key issue in industrial energy conservation.

[0003] Most existing air compressor waste heat recovery systems use a simple heat exchange method. While this method can recover heat to a certain extent, in actual production conditions, the cooling water's heating and cooling load demands are constantly changing and are affected by a combination of factors. Existing simple heat exchange waste heat recovery systems lack a flexible adjustment mechanism to adapt to these complex and changing conditions. This results in low waste heat recovery efficiency in some cases, and a large amount of waste heat is not effectively utilized. In other cases, the stability of the system operation is difficult to ensure, and problems such as abnormal fluctuations in cooling water temperature may occur, which in turn affects the normal operation of the entire production process.

[0004] These technical bottlenecks not only restrict the energy recovery efficiency, but also increase the system operation risk. There is an urgent need to develop a new waste heat recovery solution for air compressor waste heat recovery and intelligent control of hot and cold loads. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a method, system and storage medium for controlling the cooling and heating loads of waste heat recovery from an air compressor, so as to solve the technical problems of low waste heat recovery efficiency and insufficient system adaptability leading to operational risks.

[0006] To achieve the above objectives, an embodiment of the present invention provides a method for controlling heat and cold loads of an air compressor by recovering waste heat, comprising: Get the system's temperature data; adjusting the heat pump load according to the temperature data; Obtain the temperature trend of the air compressor cooling water; According to the air compressor cooling water temperature trend, determine whether the air compressor cooling water temperature exceeds the warning value; If it is judged that the warning value is exceeded, determine whether the air compressor cooling water temperature will continue to rise; When it is determined that the air compressor cooling water temperature will continue to rise, the opening of the three-way valve is adjusted according to the air compressor cooling water temperature trend; Adjust the cooling tower fan speed according to the air compressor cooling water temperature trend.

[0007] Optionally, adjusting the heat pump load according to the temperature data includes: Determine the objective function; Iteratively updating the heat pump hot end temperature setting value according to the objective function; The heat pump load is adjusted according to the heat pump hot end temperature setting value.

[0008] Optionally, determining the objective function includes: According to formula (1), the objective function is determined. , (1) in, is the objective function, is the hot end weight coefficient, is the cold end weight coefficient, is the ideal temperature of the hot end, is the hot end temperature setting value, is the system heat transfer efficiency, is the lower limit of cooling water temperature, is the cold end water outlet temperature, is an additional safety margin for the cold junction temperature.

[0009] Optionally, according to the objective function, iteratively updating the heat pump hot end temperature setting value includes: Update the heat pump hot end temperature setting value according to formula (2) and formula (3), , (2) , (3) in, for The hot end temperature setting value at the moment, for The hot end temperature setting value at the moment, is the learning rate, is the gradient of the objective function with respect to the set value of the hot end temperature, is the hot end weight coefficient, is the cold end weight coefficient, is the ideal temperature of the hot end, is the hot end temperature setting value, is the system heat transfer efficiency, is the lower limit of cooling water temperature, is the cold end water outlet temperature, is an additional safety margin for the cold junction temperature.

[0010] Optionally, adjusting the heat pump load according to the heat pump hot end temperature setting value includes: According to formula (4), the heat pump load is adjusted. , (4) in, The heat pump load, is the hot end temperature setting value, is the outlet water temperature at the hot end.

[0011] Optionally, obtaining the air compressor cooling water temperature trend includes: According to formula (5), the moving average of the cooling water temperature is obtained. , (5) in, is the moving average, is the window size of the moving average, For cooling water The temperature of the moment.

[0012] Optionally, adjusting the opening of the three-way valve according to the temperature trend of the air compressor cooling water includes: According to formula (6) to formula (8), the three-way valve opening instruction is obtained. , (6) , (7) , (8) in, is the final valve opening instruction, is the control quantity of the previous cycle, is the adjustment amount, is the proportional term coefficient, is the integral term coefficient, is the differential term coefficient, is the error signal, is the upper limit of cooling water temperature, is the cooling water temperature.

[0013] Optionally, adjusting the cooling tower fan speed according to the air compressor cooling water temperature trend includes: According to formula (9) and formula (10), the adjustment amount of fan frequency is obtained. , (9) , (10) in, is the adjustment amount of the fan frequency, 、 、 is the PID control parameter, is the error signal, is the upper limit of cooling water temperature, is the cooling water temperature; Compensation calculation is performed according to formula (11): , (11) in, is the fan frequency compensation caused by flow, is the flow compensation coefficient, is the flow rate change rate; According to formula (12), the final cooling tower fan frequency adjustment is obtained: , (12) in, The final fan frequency adjustment amount.

[0014] On the other hand, the present invention provides an air compressor waste heat recovery cooling and heating load control system, which includes a processor configured to execute any of the methods described above.

[0015] In another aspect, the present invention further provides a computer-readable storage medium having instructions stored thereon. When the instructions are executed by a processor, any of the above methods is implemented.

[0016] Beneficial effects of the present invention: The embodiment of the present invention establishes a dynamic control mechanism by collecting system temperature data in real time: the heat pump load is intelligently adjusted based on the cooling water temperature monitoring results. When it is detected that the temperature exceeds the set threshold, the system further analyzes the temperature change trend and coordinately adjusts the three-way valve opening and the cooling tower fan speed accordingly to form a closed-loop control strategy with multi-parameter linkage. Compared with the existing technology: through the coordinated regulation of the heat pump and the cooling tower, it can ensure that the cooling water temperature is always stable in the optimal working range. The trend prediction algorithm is used to respond to temperature fluctuations in advance, shortening the system adjustment response time. Through the load adaptive mechanism, the waste heat recovery efficiency is significantly improved under different working conditions. Ultimately, under the premise of ensuring the operational stability of the air compressor system, the waste heat utilization rate is maximized, the energy structure is significantly optimized, and carbon emissions are reduced.

[0017] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings: Figure 1 Flowchart of a method for controlling cooling and heating loads of waste heat recovery from an air compressor according to one embodiment of the present invention; Figure 2 A flow chart of a method for adjusting heat pump load according to one embodiment of the present invention; Figure 3 The figure is a block diagram of a cooling and heating load control system for air compressor waste heat recovery according to one embodiment of the present invention. Description of Reference Numerals 1. Heat pump unit; 2. Heat exchanger; 3. Air compressor; 4. Cooling tower; 5. Processor. DETAILED DESCRIPTION

[0019] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0020] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of laws and regulations. In the embodiments of this application, certain software, components, models, and other existing solutions in the industry may be mentioned. These should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use such solutions.

[0021] like Figure 1 The figure shows a flow chart of a method for controlling the heat load of air compressor waste heat recovery according to one embodiment of the present invention. Figure 1 In the control method, the following steps may be included: In step S10, temperature data of the system is obtained; In step S11, the heat pump load is adjusted according to the temperature data; In step S12, the temperature trend of the air compressor cooling water is obtained; In step S13, judging whether the air compressor cooling water temperature exceeds the warning value according to the air compressor cooling water temperature trend; In step S14, if it is determined that the temperature exceeds the warning value, it is determined whether the air compressor cooling water temperature will continue to rise; In step S15, when it is determined that the air compressor cooling water temperature will continue to rise, the opening of the three-way valve is adjusted according to the air compressor cooling water temperature trend; In step S16, the speed of the cooling tower fan is adjusted according to the temperature trend of the air compressor cooling water.

[0022] In this Figure 1In the air compressor waste heat recovery cooling and heating load control method shown, step S10 is used to obtain the system temperature data. Specifically, in this embodiment, the obtained system temperature data may include: the current air compressor cooling water temperature , heat pump hot end water temperature , cold end water temperature , heat pump hot end temperature setting value At the same time, in order to prevent the air compressor from being affected by the cooling water temperature, set the cooling water temperature lower limit , high temperature limit .

[0023] Step S11 is used to adjust the heat pump load according to the temperature data. In this example, the heat pump unit is set to the hot end temperature. Run for target value, combined with lower temperature limit , based on the model predictive control algorithm Real-time calculation and adjustment are performed to adjust the heat pump load to avoid the air compressor operation being affected by the low cooling water temperature. Specifically, in this embodiment, the specific method for adjusting the heat pump load in step S11 can be various forms known to those skilled in the art. In one example of the present invention, step S11 may include: Figure 2 The steps shown in Figure 2 In the embodiment, step S11 may include: In step S20, the objective function is determined; In step S21, the temperature setting value of the heat pump hot end is iteratively updated according to the objective function; In step S22, the heat pump load is adjusted according to the set value of the heat pump hot end temperature.

[0024] In this Figure 2 In the method shown, step S20 is used to determine the objective function. The desired setting value of the hot end is the ideal temperature value set according to the user's needs. , the objective function should be minimized and Specifically, in this example, the specific method for determining the objective function in step S20 can be various forms known to those skilled in the art. In one example of the present invention, step S20 may include: According to formula (1), the objective function is determined. , (1) in, is the objective function, is the hot end weight coefficient, is the cold end weight coefficient, which is used to balance the control importance of the hot end and the cold end. and The difference between them is dynamically adjusted. is the ideal temperature of the hot end, is the hot end temperature setting value, is the system heat transfer efficiency, is the lower limit of cooling water temperature, is the cold end water outlet temperature, An additional safety margin is provided for the cold end temperature to ensure that the cooling water temperature remains at above.

[0025] Step S21 is used to iteratively update the temperature setting value of the heat pump hot end. In this embodiment, in order to accurately update the setting value, step S21 can be updated by gradient calculation for each control cycle 𝑘. Furthermore, the specific method for iteratively updating the temperature setting value of the heat pump hot end in step S21 may be in various forms known to those skilled in the art. In one example of the present invention, step S21 may include: Update the heat pump hot end temperature setting value according to formula (2) and formula (3), , (2) , (3) in, for The hot end temperature setting value at the moment, for The hot end temperature setting value at the moment, is the learning rate, is the gradient of the objective function with respect to the set value of the hot end temperature, is the hot end weight coefficient, is the cold end weight coefficient, is the ideal temperature of the hot end, is the hot end temperature setting value, is the system heat transfer efficiency, is the lower limit of cooling water temperature, is the cold end water outlet temperature, is an additional safety margin for the cold junction temperature.

[0026] Through step S21, the adjustment can be calculated in real time , so that step S22 can further adjust the heat pump load Specifically, in this example, step S22 may be, for example, to adjust the heat pump load using formula (4), , (4) in, The heat pump load, is the hot end temperature setting value, is the outlet water temperature at the hot end.

[0027] Step S12 is used to obtain the temperature trend of the air compressor cooling water. In this embodiment, when the air compressor cooling water is not enough to be reduced to within the range of process requirements after heat exchange through the plate heat exchanger, in order to ensure the stable operation of the system, it is necessary to adjust the opening of the three-way valve on the cooling water circulation pipeline so that part of the cooling water is cooled through the cooling tower. At the same time, according to the water flow and temperature entering the cooling tower, the cooling tower fan is frequency-controlled to ensure that the temperature of the air compressor cooling water is always within the range of process requirements and the normal operation of the air compressor is guaranteed. Therefore, it is necessary to monitor the air compressor cooling water temperature and trend in real time and make corresponding processing. In this embodiment, the specific method for obtaining the air compressor cooling water temperature trend can be a variety of forms known to those skilled in the art. In one example of the present invention, it can be to first determine the window size of the moving average. , collect recent Temperature data at each time point , and calculate the arithmetic mean of the temperature data in the selected window. Specifically, in this example, this step may include: According to formula (5), the moving average of the cooling water temperature is obtained. , (5) in, is the moving average, is the window size of the moving average, For cooling water The temperature of the moment.

[0028] Step S13 is used to determine whether the air compressor cooling water temperature exceeds the warning value. Rising to the cooling water temperature warning value When the temperature of the air compressor cooling water continues to rise, step S14 is used to determine whether the temperature of the air compressor cooling water will continue to rise. If it is determined that the temperature of the air compressor cooling water will continue to rise, step S15 is used to adjust the opening of the three-way valve in advance. Specifically, in this embodiment, the specific method for adjusting the opening of the three-way valve in step S15 can be various forms known to those skilled in the art. In one example of the present invention, step S15 may include: According to formula (6) to formula (8), the three-way valve opening instruction is obtained. , (6) , (7) , (8) in, is the final valve opening instruction, is the control quantity of the previous cycle, is the adjustment amount, is the proportional term coefficient, is the integral term coefficient, is the differential term coefficient, is the error signal, is the upper limit of cooling water temperature, is the cooling water temperature.

[0029] Step S16 is used to adjust the cooling tower fan speed according to the air compressor cooling water temperature trend. In this embodiment, the specific method for adjusting the cooling tower fan speed in step S16 can be various forms known to those skilled in the art. In one example of the present invention, step S16 may include: According to formula (9) and formula (10), the adjustment amount of fan frequency is obtained. , (9) , (10) in, is the adjustment amount of the fan frequency, 、 、 is the PID control parameter, is the error signal, is the upper limit of cooling water temperature, is the cooling water temperature; Compensation calculation is performed according to formula (11): , (11) in, is the fan frequency compensation caused by flow, is the flow compensation coefficient, is the flow rate change rate; According to formula (12), the final cooling tower fan frequency adjustment is obtained: , (12) in, The final fan frequency adjustment amount.

[0030] Adjust PID parameters according to the three-way valve opening, cooling tower fan frequency, and air compressor cooling water temperature changes to optimize the control effect.

[0031] On the other hand, the present invention provides an air compressor waste heat recovery cooling and heating load control system. The structural block diagram of the control system can be as follows Figure 3 As shown. Figure 3 In the embodiment, the control system includes a heat pump unit 1, a heat exchanger 2, an air compressor 3, a cooling tower 4 and a processor 5.

[0032] Heat pump unit 1 is designed to use the hot-end set temperature as the control target and adjust the heat pump load in real time based on the difference between the actual temperature and the set value. The cold end of heat pump unit 1 is connected to a heat exchanger, which absorbs waste heat from the cooling water. The hot end converts the recovered heat into hot water for consumption at the user end. Heat exchanger 2 efficiently transfers waste heat generated during the operation of air compressor 3 to the cold end of heat pump unit 1. The high-temperature cooling water from air compressor 3 serves as the heat source for waste heat recovery and enters the subsequent heat exchange process. Cooling tower 4 is used to dissipate excess heat to the outside environment when heat pump unit 1 cannot fully absorb the cooling water waste heat. Cooling tower 4 is also connected to the air compressor cooling water circulation system. A three-way valve in the pipeline precisely adjusts the cooling tower flow rate to ensure that the cooling water temperature remains within the process requirements. Processor 5 is connected to the heat pump unit, heat exchanger, air compressor, and cooling tower and is configured to execute any of the above-described methods.

[0033] During system operation, heat pump unit 1 uses the hot-end setpoint temperature as its control target and adjusts the heat pump load in real time based on the difference between the actual temperature and the setpoint. This dynamic adjustment mechanism ensures stable heat output and meets user heat requirements. To prevent low cooling water temperatures from impacting the normal operation of the air compressor, the system incorporates a cold-end temperature protection mechanism. When the difference between the cold-end temperature and the minimum allowable temperature falls below a certain threshold, the system adjusts the heat pump load in real time based on operating conditions. This protects the cold-end temperature by adjusting the setpoint temperature of the heat pump's hot end. If the heat exchange capacity of the heat pump unit's cold end is insufficient to handle the excess heat from the compressor cooling water, the system adjusts the cooling tower flow rate via a three-way valve, directing some cooling water directly to the cooling tower for additional cooling. The cooling tower fan is also frequency-controlled based on the water flow and temperature entering the cooling tower to ensure the compressor cooling water temperature remains within the process requirements, ensuring stable operation of the compressor unit.

[0034] Furthermore, the compressor waste heat recovery cooling and heating load control system is capable of self-learning and optimization. The control system collects historical data on heat pump load, hot-end setpoint temperature, three-way valve opening, cooling tower fan frequency, and compressor cooling water temperature for model training and self-learning. By continuously optimizing the control model, the system can better adapt to different operating conditions, further improving waste heat recovery efficiency and system stability. To ensure efficient operation, the system sets upper and lower limits for the heat pump unit load and periodically updates these limits based on actual operating conditions. This ensures that the system consistently maintains optimal energy efficiency under varying operating conditions, avoiding energy waste and equipment loss caused by excessive or insufficient loads.

[0035] In another aspect, the present invention further provides a computer-readable storage medium having instructions stored thereon. When the instructions are executed by a processor, any of the above methods is implemented.

[0036] The embodiment of the present invention establishes a dynamic control mechanism by collecting system temperature data in real time: the heat pump load is intelligently adjusted based on the cooling water temperature monitoring results. When the temperature is detected to exceed the set threshold, the system further analyzes the temperature change trend and coordinately adjusts the three-way valve opening and the cooling tower fan speed accordingly, forming a closed-loop control strategy with multi-parameter linkage. Compared with the existing technology: through real-time detection and adjustment of hot and cold loads, the system can more efficiently recover the waste heat generated by the air compressor, improving energy utilization and overall system energy efficiency; the system can accurately control the heat pump load and valve opening according to the actual temperature changes of the air compressor cooling water, ensuring that the cooling water temperature can be stabilized within the process requirements while also optimizing the system energy consumption; the system takes into account the adaptability under different operating conditions, so that the waste heat recovery system can respond quickly and intelligently to load changes.

[0037] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0038] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0039] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1The function specified in one or more boxes.

[0040] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0041] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0042] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0043] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can be implemented using any method or technology for information storage. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change RAM (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

[0044] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0045] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for controlling the cooling and heating loads of waste heat recovery from an air compressor, characterized in that: The control method includes: Get the system's temperature data; adjusting the heat pump load according to the temperature data; Obtain the temperature trend of the air compressor cooling water; According to the air compressor cooling water temperature trend, determine whether the air compressor cooling water temperature exceeds the warning value; If it is judged that the warning value is exceeded, determine whether the air compressor cooling water temperature will continue to rise; When it is determined that the air compressor cooling water temperature will continue to rise, the opening of the three-way valve is adjusted according to the air compressor cooling water temperature trend; Adjust the cooling tower fan speed according to the air compressor cooling water temperature trend.

2. The control method according to claim 1, characterized in that: Adjusting the heat pump load according to the temperature data includes: Determine the objective function; Iteratively updating the heat pump hot end temperature setting value according to the objective function; The heat pump load is adjusted according to the heat pump hot end temperature setting value.

3. The control method according to claim 2, characterized in that: Determining the objective function includes: According to formula (1), the objective function is determined. ，（1） in, is the objective function, is the hot end weight coefficient, is the cold end weight coefficient, is the ideal temperature of the hot end, is the hot end temperature setting value, is the system heat transfer efficiency, is the lower limit of cooling water temperature, is the cold end water outlet temperature, is an additional safety margin for the cold junction temperature.

4. The control method according to claim 2, characterized in that: According to the objective function, iteratively updating the temperature setting value of the heat pump hot end includes: Update the heat pump hot end temperature setting value according to formula (2) and formula (3), ，（2） ，（3） in, for The hot end temperature setting value at the moment, for The hot end temperature setting value at the moment, is the learning rate, is the gradient of the objective function with respect to the set value of the hot end temperature, is the hot end weight coefficient, is the cold end weight coefficient, is the ideal temperature of the hot end, is the hot end temperature setting value, is the system heat transfer efficiency, is the lower limit of cooling water temperature, is the cold end water outlet temperature, is an additional safety margin for the cold junction temperature.

5. The control method according to claim 2, characterized in that: According to the set value of the heat pump hot end temperature, adjusting the heat pump load includes: According to formula (4), the heat pump load is adjusted. ，（4） in, The heat pump load, is the hot end temperature setting value, is the outlet water temperature at the hot end.

6. The control method according to claim 1, characterized in that: Obtaining the air compressor cooling water temperature trend includes: According to formula (5), the moving average of the cooling water temperature is obtained. ，（5） in, is the moving average, is the window size of the moving average, For cooling water The temperature of the moment.

7. The control method according to claim 1, characterized in that: According to the temperature trend of the air compressor cooling water, adjusting the opening of the three-way valve includes: According to formula (6) to formula (8), the three-way valve opening instruction is obtained. ，（6） ，（7） ，（8） in, is the final valve opening instruction, is the control quantity of the previous cycle, is the adjustment amount, is the proportional term coefficient, is the integral term coefficient, is the differential term coefficient, is the error signal, is the upper limit of cooling water temperature, is the cooling water temperature.

8. The control method according to claim 1, characterized in that: According to the air compressor cooling water temperature trend, adjusting the cooling tower fan speed includes: According to formula (9) and formula (10), the adjustment amount of fan frequency is obtained. ，（9） ，（10） in, is the adjustment amount of the fan frequency, 、 、 is the PID control parameter, is the error signal, is the upper limit of cooling water temperature, is the cooling water temperature; Compensation calculation is performed according to formula (11): ，（11） in, is the fan frequency compensation caused by flow, is the flow compensation coefficient, is the flow rate change rate; According to formula (12), the final cooling tower fan frequency adjustment is obtained: ，（12） in, The final fan frequency adjustment amount.

9. An air compressor waste heat recovery cooling and heating load control system, characterized in that: The system comprises a processor configured to execute the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores instructions, and when the instructions are executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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