Hydraulic working condition decoupling control method and device for water mixing heat exchange system

Abstract

The invention provides a control method and device for hydraulic working condition decoupling of a water mixing heat exchange system, temperature, pressure and flow data of cold and hot fluids in the water mixing heat exchange system are collected in real time through a sensor module, and after a control unit receives the data of the sensor module, the temperature, the pressure and the flow data of the cold and hot fluids in the water mixing heat exchange system are controlled by running a preset control algorithm program. The optimal water mixing proportion is calculated and transmitted to the decoupling controller according to an instruction of the control unit, the opening degree of the electric adjusting valve is adjusted so as to change the mixing proportion of cold water and hot water and ensure that the system outputs stable temperature, and the executing mechanism adjusts the rotating speed of the water pump and opening and closing of the air door according to needs so as to meet the operation requirement of the system and maintain overall hydraulic balance. The problems that an existing water mixing heat exchange system is insufficient in stability, high in energy consumption, difficult to control the outlet water temperature accurately and the like in the aspect of the hydraulic working condition are solved, accurate decoupling control over the hydraulic working condition of the water mixing heat exchange system is achieved, and therefore the system performance is improved, the energy consumption is reduced, and stable output of the outlet water temperature is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of heating, ventilation and air conditioning, and relates to a hydraulic condition decoupling control method and device for a mixed water heat exchange system. Background Art

[0002] In modern society, HVAC systems are widely used in residential, office, commercial and industrial areas as an important part of construction projects. Among them, the mixed water heat exchange system is a key subsystem in the HVAC system. Its main function is to meet users' needs for indoor temperature and comfort by accurately controlling the mixing of cold and hot media. However, with the expansion of the application scope of the mixed water heat exchange system, its problems such as unstable hydraulic conditions, high energy consumption and difficulty in accurately controlling the outlet water temperature have gradually become prominent, which are specifically reflected in the following aspects: Unstable hydraulic conditions: In actual operation, due to the influence of various factors (such as water flow changes, valve opening adjustment, etc.), the hydraulic conditions of the mixed water heat exchange system are prone to fluctuations, resulting in low system operation efficiency. Difficult to control outlet water temperature: In actual applications, due to the inability to accurately control the flow and proportion of cooling water or hot water, the outlet water temperature of the mixed water heat exchange system is difficult to stabilize at the set value. This fluctuation not only affects the user's comfort, but may also cause equipment damage. Difficult system maintenance: In the case of unstable hydraulic conditions, traditional mixed water heat exchange systems may need to frequently adjust parameters such as valve opening, which brings inconvenience to system maintenance.

[0003] The problems existing in the hydraulic conditions of the mixed water heat exchange system not only affect the performance and reliability of the system, but are also closely related to energy consumption, environmental protection and user comfort. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide a method and device for decoupling control of the hydraulic working conditions of a mixed water heat exchange system. By decoupling the mixed water heat exchange system, the cold and hot fluids can maintain a stable temperature when exchanging heat. This saves water resources, reduces the amount of mixed water, and reduces system energy consumption. An intelligent control algorithm is used to achieve precise control of the mixed water heat exchange system and improve the system operation stability. This increases the service life of the equipment, reduces maintenance costs, reduces heating costs, and achieves energy conservation and carbon reduction.

[0005] The present invention is achieved through the following technical solutions: A hydraulic condition decoupling control method for a mixed water heat exchange system, comprising: Real-time collection of temperature, pressure and flow data of cold and hot fluids in the mixed water heat exchange system; Based on the real-time collection of temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, mathematical modeling of the mixed water heat exchange system is carried out to construct a mathematical model of the mixed water heat exchange system; Solve the mathematical model of the mixed water heat exchange system to obtain the transfer function between the cold and hot fluids, and calculate the optimal mixed water ratio of the mixed water heat exchange system; According to the mixed water ratio of the mixed water heat exchange system, the opening of the electric regulating valve and the speed of the water pump are controlled to maintain the overall hydraulic balance.

[0006] Preferably, the temperature, pressure and flow rate data of the cold and hot fluids in the mixed water heat exchange system are collected in real time and preprocessed, including eliminating noise, filling missing values ​​and normalizing.

[0007] Preferably, a mathematical model of the mixed water heat exchange system is constructed as follows: Based on the real-time collection of temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, the mathematical model of the mixed water heat exchange system is constructed by using the energy conservation equation, momentum conservation equation and heat transfer equation combined with the characteristics of the mixed water heat exchange system.

[0008] Preferably, the energy conservation equation is expressed as: Q 热源 -Q 热损失 -Q 泵功 =Δ E 水 +Δ E 其他 in: Q 热源 The heat energy provided to the heat source; Q 热损失 It is the heat energy lost in the mixed water heat exchange system; Q 泵功 is the electric energy consumed by the operation of the water pump; Δ E 水 Change in thermal energy stored for water; Δ E 其他 It is the change in thermal energy of the heat exchanger and pipes in the mixed water heat exchange system.

[0009] Preferably, the momentum conservation equation is expressed as:

[0010] In the formula ： is the mass flow rate of the fluid, that is, the mass of the fluid passing through a certain cross section per unit time; V out and V in are the velocities of the fluid flowing out and into the cross section respectively.

[0011] Preferably, the heat transfer equation is expressed as: Q=UAΔT Where: Q is the heat transfer rate; UA is the heat transfer coefficient, ΔT is the temperature difference between the heat source and the fluid.

[0012] Preferably, the transfer function expression between the cold and hot fluids is:

[0013] Where: is the mixed water temperature, which is the output of the mixed water heat exchange system; and are the input temperatures of hot and cold water, respectively; and are the transfer functions between hot water flow rate and cold water flow rate and mixed water temperature respectively; s is the complex frequency domain variable in the Laplace transform.

[0014] A hydraulic condition decoupling control device for a mixed water heat exchange system, comprising: Sensor module, control unit, decoupling controller and actuator; The sensor module collects the temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system in real time. After receiving the data from the sensor module, the control unit calculates the optimal mixed water ratio by running the preset control algorithm program, and transmits it to the decoupling controller. According to the instructions of the control unit, the electric regulating valve opening is adjusted to change the mixing ratio of cold and hot water to ensure the stable temperature of the system output. The actuator adjusts the speed of the water pump and the opening and closing of the damper as needed to match the system operation requirements and maintain the overall hydraulic balance.

[0015] Preferably, the sensor module includes a temperature sensor, a pressure sensor and a flow sensor.

[0016] Preferably, the actuator includes an electric regulating valve and a water pump.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention also provides a hydraulic condition decoupling control method for a mixed water heat exchange system. By real-time acquisition of the temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, the system can understand the changes in the hydraulic condition in real time. Based on the real-time acquired data, the mixed water heat exchange system is mathematically modeled to construct a mathematical model of the mixed water heat exchange system. By solving the transfer function, the interaction relationship between the cold and hot fluids can be deeply understood, thereby calculating the optimal water mixing ratio. This calculation result provides an important basis for the precise control of the system. According to the calculated optimal water mixing ratio, the system can accurately control the opening of the electric regulating valve and the speed of the water pump to maintain the overall hydraulic balance. This precise control helps to reduce energy waste and improve the energy efficiency of the system. At the same time, by optimizing the mixing water ratio, the stability and safety of the system can also be ensured, and equipment damage or safety accidents caused by hydraulic imbalance can be avoided. This method realizes precise control of the hydraulic conditions of the mixed water heat exchange system through a decoupling control strategy. Decoupling control can eliminate the mutual influence between the cold and hot fluids, making the system easier to control and adjust. In addition, this method also improves the automation level of the system, reduces the need for manual intervention, and reduces the difficulty and cost of operation.

[0018] The present invention also provides a corresponding control device, including a sensor module, a controller and an actuator. The sensor module is responsible for collecting system parameters; the controller processes data and outputs a control signal; the actuator (such as a regulating valve, a pump) adjusts the mixed water volume according to the control signal to achieve precise control of the entire system. The present invention collects key parameters such as temperature, pressure and flow of the cold and hot fluids in the mixed water heat exchange system in real time by installing equipment such as temperature sensors, pressure sensors and flow sensors. These parameters are the basic data for decoupling control. Based on the collected parameters, the present invention uses an advanced modeling method to mathematically model the mixed water heat exchange system to obtain the transfer function between the cold and hot fluids. This step helps to deeply understand the complex relationship within the system and provide a theoretical basis for subsequent decoupling control. The present invention designs a decoupling controller, which dynamically adjusts the mixed water volume according to the transfer function and the preset control target. The core function of the decoupling controller is to eliminate the mutual interference between the cold and hot fluids to ensure that the system can maintain a stable operating state under different working conditions. In the control method, the present invention uses an intelligent control algorithm to optimize the decoupling controller to ensure that it can still output control signals quickly and accurately under complex and changeable working conditions. This enables the mixed water heat exchange system to adapt to changes in the external environment and achieve efficient and energy-saving operation.

[0019] Furthermore, the present invention realizes decoupling control between the cold and hot fluids through mathematical modeling and transfer function analysis. This decoupling control can effectively reduce the mutual interference between the various parts of the system and ensure that the system can operate stably under different working conditions; Furthermore, the present invention adopts advanced intelligent control algorithms, such as adaptive control, fuzzy control or neural network control, which can automatically adjust the control strategy under different operating conditions to improve the adaptability of the system; Furthermore, by accurately monitoring and calculating system parameters, the present invention can adjust the mixed water volume in real time, making the mixed water temperature more stable while avoiding energy waste; Furthermore, decoupling control technology improves heat exchange efficiency and reduces unnecessary heat loss, thus significantly reducing energy consumption while ensuring user comfort; Furthermore, the design of the present invention allows the system to automatically adjust the control strategy according to the actual operating conditions and changes in the external environment, which enables the system to maintain optimal performance under different seasons, temperatures and load changes; Furthermore, by precisely controlling the amount of mixed water, the present invention helps to optimize the use of water resources, reduce water waste, and meet the requirements of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a hydraulic condition decoupling control method for a mixed water heat exchange system; Figure 2 It is a schematic diagram of a hydraulic condition decoupling control device for a mixed water heat exchange system; In the figure: external network circulation pump 1, mixing water pump 2, sensor module 3, regulating valve 4. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0022] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] A hydraulic condition decoupling control method for a mixed water heat exchange system, such as Figure 1 As shown, including, Real-time collection of temperature, pressure and flow data of cold and hot fluids in the mixed water heat exchange system; Based on the real-time collection of temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, mathematical modeling of the mixed water heat exchange system is carried out to construct a mathematical model of the mixed water heat exchange system; Solve the mathematical model of the mixed water heat exchange system to obtain the transfer function between the cold and hot fluids, and calculate the optimal mixed water ratio of the mixed water heat exchange system; According to the mixed water ratio of the mixed water heat exchange system, the opening of the electric regulating valve and the speed of the water pump are controlled to maintain the overall hydraulic balance.

[0024] The temperature, pressure and flow rate data of the cold and hot fluids in the mixed water heat exchange system are collected in real time and preprocessed, including noise elimination, missing value filling and normalization.

[0025] The mathematical model of the mixed water heat exchange system is constructed as follows: Based on the real-time collection of temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, the mathematical model of the mixed water heat exchange system is constructed by using the energy conservation equation, momentum conservation equation and heat transfer equation combined with the characteristics of the mixed water heat exchange system.

[0026] The energy conservation equation is used to describe the input, output and storage of energy in the mixed water heat exchange system; The momentum conservation equation is used to describe the dynamic characteristics of fluid flow in a mixed water heat exchange system.

[0027] The heat transfer equation is used to describe the heat transfer process between the fluid and the wall of the mixed water heat exchanger in the mixed water heat exchange system; In a mixed water heat exchange system, the energy conservation equation is usually related to the change in water temperature and the mass flow rate of water. The energy conservation equation is expressed as: Q 热源 -Q 热损失 -Q 泵功 =Δ E 水 +Δ E 其他 in: Q 热源 It is the heat energy provided by the heat source; Q 热损失 It is the heat energy lost by the system due to heat dissipation and other reasons; Q 泵功 is the electrical energy consumed by the pump (this energy will eventually be converted into heat energy, but is considered as output energy here); Δ E 水 It is the change in thermal energy stored in water, which is related to the change in water temperature and the mass flow rate of water. E 其他 Other parts of the system that may store or release energy (such as thermal energy changes in heat exchangers, pipes, etc.); In mixed water heat transfer systems, the momentum conservation equation is a key principle that is used to describe the dynamic characteristics of fluid flow. The expression of the momentum conservation equation is usually based on Newton's second law, that is, force equals mass times acceleration. In fluid dynamics, this principle is extended to describe the change of momentum when the fluid flows; The momentum conservation equation is expressed as:

[0028] In the formula ： is the mass flow rate of the fluid, that is, the mass of the fluid passing through a certain cross section per unit time; V out and V in are the velocities of the fluid flowing out and into the cross section respectively.

[0029] The expression of the heat transfer equation can be derived and simplified according to different heat transfer methods and conditions, but it is usually based on the basic principles of heat conduction, convection heat transfer and radiation heat transfer.

[0030] The process of heat conduction, i.e. the transfer of heat through a solid wall (such as the wall of a heat exchanger), can be described using Fourier's law: Q = kAΔT 1 / L in: Q is the heat transfer rate (W); k is the thermal conductivity (W / (m·K)), which indicates the thermal conductivity of the material; ΔT 1 is the temperature difference between the two sides of the wall (K); L is the thickness of the wall (m); A is the heat transfer area (m²).

[0031] Convective heat transfer: For the convection heat transfer process, that is, heat is transferred through the interface between the fluid and the solid wall, it can be described by Newton's law of cooling: Q=hAΔT 2 in: h is the convective heat transfer coefficient (W / (m²·K)), which indicates the heat transfer capacity between the fluid and the wall; ΔT 2 is the temperature difference between the fluid and the wall (K); A is the convective heat transfer area (m²).

[0032] The heat transfer equation can be expressed as: Q = UAΔT in: Q is the heat transfer rate (W); UAis the heat transfer coefficient (W / (K·℃)), which combines the effects of heat conduction and convection heat transfer and is an important parameter to describe the performance of the entire heat transfer process; ΔT is the temperature difference between the heat source and the fluid (°C or K).

[0033] The transfer function is usually used to describe the relationship between the input and output of the system. In the mixed water heat exchange system, the temperature of the cold and hot fluids is used as the input and output to establish the transfer function, which is: Assuming that the cold and hot fluids are fully mixed in the heat exchanger and the heat loss inside the heat exchanger is ignored, the energy exchange between the cold and hot fluids can be expressed as: The transfer function expression between the cold and hot fluids is:

[0034] Where: is the mixed water temperature, which is the output of the mixed water heat exchange system; and are the input temperatures of hot and cold water, respectively; and are the transfer functions between hot water flow rate and cold water flow rate and mixed water temperature respectively; s is the complex frequency domain variable in the Laplace transform.

[0035] Assume that there are two main inputs in the system: hot water flow and cold water flow Mixing water temperature ( ) as output. During the actual operation of the system, the decoupling controller obtains the input temperature and flow information in real time and calculates the valve opening that needs to be adjusted through the algorithm. When the system load changes, the decoupling controller dynamically adjusts the temperature and flow according to the real-time data to keep the mixed water temperature within the set range. Through the adaptive algorithm, the controller can optimize according to the historical data and real-time data of the system to reduce energy waste.

[0036] Based on the transfer function between the cold and hot fluids, the objective function is defined according to the actual needs of the system (such as maximizing energy efficiency, minimizing costs, etc.), considering the physical limitations of the system (such as flow rate, temperature range, etc.) and operating conditions (such as safety, stability, etc.), and using appropriate optimization algorithms (such as gradient descent method, genetic algorithm, etc.) to solve the optimal solution of the objective function under the constraints, and determine the optimal water mixing ratio based on the results of the optimization algorithm.

[0037] The present invention also provides a decoupling control method for the hydraulic working condition of a mixed water heat exchange system. By collecting the temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system in real time, the system can understand the changes in the hydraulic working condition in real time. This real-time monitoring helps to timely discover abnormal conditions, such as flow deviation, temperature fluctuation, etc., so as to take corresponding adjustment measures. Based on the data collected in real time, the mixed water heat exchange system is mathematically modeled to construct a mathematical model of the mixed water heat exchange system. This step provides a basis for the subsequent transfer function solution. By solving the transfer function, the interaction relationship between the cold and hot fluids can be deeply understood, so as to calculate the optimal water mixing ratio. This calculation result provides an important basis for the precise control of the system. According to the calculated optimal water mixing ratio, the system can accurately control the opening of the electric regulating valve and the speed of the water pump to maintain the overall hydraulic balance. This precise control helps to reduce energy waste and improve the energy efficiency of the system. At the same time, by optimizing the water mixing ratio, the stability and safety of the system can also be ensured, and equipment damage or safety accidents caused by hydraulic imbalance can be avoided. The method realizes precise control of the hydraulic working condition of the mixed water heat exchange system through a decoupling control strategy. Decoupling control can eliminate the mutual influence between the cold and hot fluids, making the system easier to control and adjust. In addition, this method also improves the automation level of the system, reduces the need for manual intervention, and reduces the difficulty and cost of operation.

[0038] A hydraulic condition decoupling control device for a mixed water heat exchange system of the present invention comprises: Figure 2 As shown, the sensor module includes a temperature sensor, a pressure sensor and a flow sensor, which are used to collect system parameters in real time. The control unit includes a central processing unit and a control algorithm program, which are used to process sensor data and execute control logic. The decoupling controller, which adjusts the mixing ratio according to the control unit instruction, includes a regulating valve and a controller algorithm. The actuator includes a pump and a damper, which are used to adjust the fluid flow and mixing ratio.

[0039] The schematic diagram of the present invention is as follows: the cold water inlet is the user-side return water inlet. The hot water inlet is the thermal power station outlet. The mixed water outlet represents the mixed water outlet flowing out of the system. Sensor module 3: installed at the thermal power station outlet, the user-side return water inlet and the mixed water outlet, used to detect the mixed water temperature, flow rate and pressure. The control unit is the control center of the system, which is an electronic control board including a microprocessor or a PLC. The decoupling controller displays the control logic module, which is responsible for adjusting the mixed water ratio according to the temperature read by the sensor and the preset program. The actuator includes: a regulating valve 4: located at the mixed water outlet, used to adjust the mixed water flow rate to achieve mixing of cold and hot water. External network circulation pump 1, mixing water pump 2: located in a part of the system, used to circulate the flow of fluid.

[0040] The specific implementation is as follows: The sensor module is installed at the key position of the mixed water heat exchange system, and real-time collection of the specific implementation is as follows: The main parameters that the system needs to monitor include the temperature of cold water, hot water and mixed water. The outlet water temperature needs to be maintained within the set range (70-80°C) to ensure comfort. The system pressure is maintained within the predetermined range (for example: 0.5-2 bar) to avoid unstable hydraulic conditions. The flow of cold and hot water should be adjusted according to the mixed water ratio. Cold water and hot water enter the system through the outlet of the thermal power station and the return water outlet on the user side, and the flow is controlled by the mixing water pump respectively. The sensor module monitors the temperature, pressure and flow data of cold and hot water, and transmits the data to the control unit. The control unit calculates the required mixed water ratio through an algorithm and sends the command to the decoupling controller. The decoupling controller adjusts the opening of the regulating valve according to the command to accurately control the mixing ratio of cold and hot water. The actuator (pump) adjusts the flow and mixed water volume as needed to keep the system running stably. Real-time feedback loop ensures that the outlet water temperature is stable and the system can operate efficiently under different loads and working conditions.

[0041] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A method for decoupling control of hydraulic conditions of a mixed water heat exchange system, characterized in that: include, Real-time collection of temperature, pressure and flow data of cold and hot fluids in the mixed water heat exchange system; Based on the real-time collection of temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, mathematical modeling of the mixed water heat exchange system is carried out to construct a mathematical model of the mixed water heat exchange system; Solve the mathematical model of the mixed water heat exchange system, obtain the transfer function between the cold and hot fluids, and calculate the optimal mixed water ratio of the mixed water heat exchange system; According to the mixed water ratio of the mixed water heat exchange system, the opening of the electric regulating valve and the speed of the water pump are controlled to maintain the overall hydraulic balance.

2. A method for decoupling control of hydraulic conditions of a mixed water heat exchange system according to claim 1, characterized in that: The temperature, pressure and flow data were preprocessed, including noise removal, missing value filling and normalization.

3. The method for decoupling control of hydraulic conditions of a mixed water heat exchange system according to claim 1, characterized in that: The mathematical model of the mixed water heat exchange system is constructed as follows: Based on the real-time collection of temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system, the mathematical model of the mixed water heat exchange system is constructed by using the energy conservation equation, momentum conservation equation and heat transfer equation combined with the characteristics of the mixed water heat exchange system.

4. The method for decoupling control of hydraulic conditions of a mixed water heat exchange system according to claim 3, characterized in that: The energy conservation equation is expressed as: Q 热源 -Q 热损失 -Q 泵功 =D E 水 +D E 其他 in: Q 热源 The heat energy provided to the heat source; Q 热损失 It is the heat energy lost in the mixed water heat exchange system; Q 泵功 is the electric energy consumed by the operation of the water pump; Δ E 水 Change in thermal energy stored for water; Δ E 其他 It is the change in thermal energy of the heat exchanger and pipes in the mixed water heat exchange system.

5. The method for decoupling control of hydraulic conditions of a mixed water heat exchange system according to claim 3, characterized in that: The momentum conservation equation is expressed as: In the formula ： is the mass flow rate of the fluid, that is, the mass of the fluid passing through a certain cross section per unit time; V out and V in are the velocities of the fluid flowing out and into the cross section, respectively.

6. The method for decoupling control of hydraulic conditions of a mixed water heat exchange system according to claim 3, characterized in that: The heat transfer equation is expressed as: Q = UAΔT Where: Q is the heat transfer rate; UA is the heat transfer coefficient, ΔT is the temperature difference between the heat source and the fluid.

7. A method for decoupling control of hydraulic conditions of a mixed water heat exchange system according to claim 3, characterized in that: The transfer function expression between the cold and hot fluids is: Where: is the mixed water temperature, which is the output of the mixed water heat exchange system; and are the input temperatures of hot and cold water, respectively; and are the transfer functions between hot water flow rate and cold water flow rate and mixed water temperature respectively; s is the complex frequency domain variable in the Laplace transform.

8. A hydraulic condition decoupling control device for a mixed water heat exchange system, characterized in that: include, Sensor module, control unit, decoupling controller and actuator; The sensor module collects the temperature, pressure and flow data of the cold and hot fluids in the mixed water heat exchange system in real time. After receiving the data from the sensor module, the control unit calculates the optimal mixed water ratio by running the preset control algorithm program, and transmits it to the decoupling controller. According to the instructions of the control unit, the electric regulating valve opening is adjusted to change the mixing ratio of cold and hot water to ensure the stable temperature of the system output. The actuator adjusts the speed of the water pump and the opening and closing of the damper as needed to match the system operation requirements and maintain the overall hydraulic balance.

9. A hydraulic condition decoupling control device for a mixed water heat exchange system according to claim 8, characterized in that: The sensor module includes a temperature sensor, a pressure sensor and a flow sensor.

10. The hydraulic condition decoupling control device for a mixed water heat exchange system according to claim 8, characterized in that: The actuator includes a regulating valve and a pump.

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