Control method, control system and control device for cooling triangular louver and medium

Abstract

The invention discloses a control method, a control system, a control device and a medium for a cooling triangular shutter, and relates to the technical field of indirect air cooling. The current flow speed, detected by a water flow sensor in a cooling triangle, of circulating water in each pipe bundle and the current temperature, detected by a temperature sensor, of the circulating water in each pipe bundle are obtained; obtaining heat dissipation efficiency influence factor data of the cooling triangle; if the current flow speed is lower than the flow speed threshold value and / or the current temperature is lower than the temperature threshold value, the opening coefficient of the cooling triangular louver is calculated according to the current flow speed, the current temperature and the heat dissipation efficiency influence factor data; the target opening degree of the cooling triangular louver is determined according to the opening degree coefficient, and the opening degree of the louver is reduced to the target opening degree in the next control period; therefore, when the current flow speed and / or the current temperature are / is low, the opening degree of the shutter can be actively reduced, the ventilation quantity is reduced, heat loss is reduced, circulating water is effectively prevented from freezing, and reliable anti-freezing protection of the cooling triangle is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of indirect air cooling, in particular to a control method, a control system, a control device and a medium for cooling a cooling louvre. BACKGROUND

[0002] An indirect air cooling tower (referred to as an indirect cooling tower) is a cooling device arranged to cool the exhaust steam of a steam turbine in a thermal power generating unit, and is mostly a natural draft cooling tower. In order to cool the exhaust steam of the condenser, the indirect cooling unit uses circulating water as an intermediate medium. The circulating water is cooled by the exhaust steam of the steam turbine at the condenser, and the heated circulating water is brought to the cooling triangle of the indirect cooling tower sector by a circulating water pump, and exchanges heat with the cold air passing through the cooling triangle from the bottom of the tower to the top, so as to cool the circulating water in the pipeline. The cooled circulating water returns to the condenser for the next heat exchange cycle.

[0003] The cooling triangle is vertically placed at the bottom of the indirect cooling tower and is composed of two groups of heat dissipation surfaces and one group of louvres. During the power generation process of the indirect air cooling generator unit, the heated circulating water enters the cooling triangle through the circulating water pump and exchanges heat with the cold air in the cross-flow finned tube bundle of the heat dissipation surface under the action of the natural draft of the cooling tower. The circulating water is cooled by transferring heat to the air and returns to the condenser for the next heat exchange cycle. Since foreign matters such as fouling, impurity accumulation or biological pollution are likely to enter the cooling triangle during installation and use, and it is difficult to find the entry of foreign matters. The foreign matters in the tube bundle can significantly reduce the flow of the circulating water. The stagnant circulating water in the cold environment cannot remove heat through continuous flow, the local temperature rapidly drops below the freezing point, the circulating water expands after freezing, causing local stress concentration of the pipe wall, especially at the weak parts such as welds or elbows, and finally leading to the burst of the tube bundle, which has a safety impact on the indirect cooling tower and the generator unit.

[0004] Therefore, how to effectively prevent the circulating water from freezing to realize the anti-freezing protection of the cooling triangle is a problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a control method, a control system, a control device and a medium for cooling a cooling louvre, which are used to solve the problem that the stagnant circulating water in the cold environment cannot remove heat through continuous flow, the local temperature rapidly drops below the freezing point, and the circulating water freezing leads to the burst of the tube bundle.

[0006] To solve the above technical problems, the present application provides a control method for cooling a cooling louvre, comprising:

[0007] obtaining current flow rates of circulating water in each tube bundle detected by water flow sensors in the cooling triangle, current temperatures of the circulating water in each tube bundle detected by temperature sensors, and heat dissipation performance influencing factor data of the cooling triangle; wherein the heat dissipation performance influencing factor data comprises ambient temperature, ambient wind speed, ambient wind direction, target water temperature of the sector cold water mother pipe, and actual water temperature of the sector cold water mother pipe;

[0008] if the current flow rate is lower than a flow rate threshold value and / or the current temperature is lower than a temperature threshold value, calculating an opening degree coefficient of the cooling triangle louvers according to the current flow rate, the current temperature, and the heat dissipation performance influencing factor data;

[0009] determining a target opening degree of the cooling triangle louvers according to the opening degree coefficient, and reducing the opening degree of the louvers to the target opening degree in the next control cycle.

[0010] In an optional embodiment, calculating the opening degree coefficient of the cooling triangle louvers according to the current flow rate, the current temperature, and the heat dissipation performance influencing factor data comprises:

[0011] calculating current flow rates of each tube bundle according to the current flow rate and tube bundle cross-sectional area;

[0012] calculating tube bundle average flow rates according to circulating pump power, power flow rate coefficient, and the number of tube bundles of the cooling triangle;

[0013] determining flow rate errors of each tube bundle according to the current flow rates and the tube bundle average flow rates, and determining a cooling triangle flow rate mean square error based on the flow rate errors of each tube bundle;

[0014] determining tube bundle flow rate coefficients according to the cooling triangle flow rate mean square error and flow rate coefficients;

[0015] calculating tube bundle flow rate average values according to the current flow rates of circulating water in each tube bundle, and determining flow minimum values in the current flow rates of each tube bundle;

[0016] calculating the opening degree coefficient according to the heat dissipation performance influencing factor data, the tube bundle flow rate average values, the flow minimum values, temperature coefficients, wind speed coefficients, louver position coefficients, water temperature coefficients, tube bundle flow rate coefficients, and tube bundle flow rate coefficients.

[0017] In an optional embodiment, calculating current flow rates of each tube bundle according to the current flow rate and tube bundle cross-sectional area comprises:

[0018] calculating the current flow rates of each tube bundle according to a first preset formula;

[0019] The first preset formula is: ;

[0020] Wherein, F1 is the current flow, A is the pipe bundle cross-sectional area, S1 is the current flow rate.

[0021] In an alternative embodiment, the pipe bundle average flow is calculated according to the circulating pump power, the power flow coefficient, and the number of pipe bundles of the cooling triangle, comprising:

[0022] The pipe bundle average flow is calculated according to a second preset formula;

[0023] The second preset formula is: ;

[0024] Wherein, F3 is the pipe bundle average flow, E2 is the circulating pump power, K7 is the power flow coefficient, and N is the number of pipe bundles.

[0025] In an alternative embodiment, the pipe bundle flow rate coefficient is determined according to the cooling triangle flow mean square deviation and the flow rate coefficient, comprising:

[0026] The pipe bundle flow rate coefficient is calculated according to a third preset formula;

[0027] The third preset formula is: ;

[0028] Wherein, C is the pipe bundle flow rate coefficient, V is the cooling triangle flow mean square deviation, and K8 is the flow rate coefficient.

[0029] In an alternative embodiment, the opening degree coefficient is calculated according to the heat dissipation performance influencing factor data, the pipe bundle flow rate average value, the flow minimum value, the temperature coefficient, the wind speed coefficient, the louver position coefficient, the water temperature coefficient, the pipe bundle flow rate coefficient, and the pipe bundle flow coefficient, comprising:

[0030] The opening degree coefficient is calculated according to a fourth preset formula;

[0031] The fourth preset formula is: ;

[0032] Wherein, K1 is the opening degree coefficient, T3 is the ambient temperature, K2 is the temperature coefficient, S2 is the ambient wind speed, K3 is the wind speed coefficient, D2 is the ambient wind direction, K4 is the louver position coefficient, T1 is the sector cold water mother pipe target water temperature, T2 is the sector cold water mother pipe actual water temperature, K5 is the water temperature coefficient, S3 is the pipe bundle flow rate average value, C is the pipe bundle flow rate coefficient, F2 is the flow minimum value, and K6 is the pipe bundle flow coefficient.

[0033] The application also provides a control system of a cooling triangle louver, comprising: a plurality of water flow sensors, a plurality of temperature sensors, an environment monitoring device, and a data processing device.

[0034] The water flow sensor and the temperature sensor are arranged on the tube bundle of the cooling delta, the environment monitoring device is used for detecting the ambient temperature, the ambient wind speed and the ambient wind direction, and the data processing device is connected with the water flow sensor, the temperature sensor and the actuator of the cooling delta louvre respectively, and is used for executing the steps of the control method of the cooling delta louvre.

[0035] In an alternative embodiment, the data processing device comprises a server, a gateway and a DCS, the water flow sensor is a Hall flowmeter, the server is connected with the gateway and the DCS respectively, the gateway is connected with the Hall flowmeter and the temperature sensor respectively, and the DCS is connected with the actuator.

[0036] The application further provides a control device of a cooling delta louvre, comprising a memory for storing a computer program;

[0037] A processor is used for executing the computer program to realize the steps of the control method of the cooling delta louvre.

[0038] The application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the steps of the control method of the cooling delta louvre.

[0039] The application provides a control method of a cooling delta louvre, comprising: acquiring current flow rates of circulating water in each tube bundle detected by a water flow sensor in the cooling delta, current temperatures of the circulating water in each tube bundle detected by a temperature sensor, and data of factors influencing heat dissipation efficiency of the cooling delta; wherein the data of factors influencing heat dissipation efficiency of the cooling delta comprise an ambient temperature, an ambient wind speed, an ambient wind direction, a target water temperature of a sector cold water mother pipe and an actual water temperature of the sector cold water mother pipe; if the current flow rate is lower than a flow rate threshold value and / or the current temperature is lower than a temperature threshold value, calculating an opening degree coefficient of the cooling delta louvre according to the current flow rate, the current temperature and the data of factors influencing heat dissipation efficiency of the cooling delta; determining a target opening degree of the cooling delta louvre according to the opening degree coefficient, and reducing the opening degree of the louvre to the target opening degree in a next control period. By monitoring the current flow rate and the current temperature of the circulating water in each tube bundle, and dynamically calculating the opening degree coefficient of the louvre in combination with the ambient temperature, the ambient wind speed, the ambient wind direction, the target water temperature of the sector cold water mother pipe and the actual water temperature of the sector cold water mother pipe, the opening degree of the louvre can be actively reduced when the current flow rate and / or the current temperature is low, the ventilation amount is reduced, the heat dissipation is reduced, the freezing of the circulating water is effectively prevented, the reliable anti-freezing protection of the cooling delta is realized, and the safety influence on the intercooling tower and the generator set is effectively avoided.

[0040] In addition, the opening coefficient of the cooling louvers is calculated according to the current flow rate, the current temperature and the heat dissipation performance influencing factor data; and the target opening of the cooling louvers is determined according to the opening coefficient, which can effectively avoid the situation that the opening of the louvers is too small or not enough compared with the opening adjustment of the louvers based on artificial experience, and realizes the precise quantitative control of the opening of the louvers.

[0041] The cooling louver control system, the control device and the medium provided by the application have the corresponding advantages and effects of the cooling louver control method, and the effects are as described above. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0043] Figure 1 The flow chart of the cooling louver control method provided by the embodiments of the application is shown in the figure.

[0044] Figure 2 The structure diagram of the cooling louver control system provided by the embodiments of the application is shown in the figure.

[0045] Figure 3 The structure diagram of the cooling louver control device provided by the embodiments of the application is shown in the figure.

[0046] The reference signs are as follows: 1-cooling louver, 2-sensor assembly, 3-data acquisition cable, 4-gateway, 5-server, 6-distributed control system, 7-executing mechanism. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0048] The core of the application is to provide a cooling louver control method, a control system, a control device and a medium, which are used to effectively avoid the icing of circulating water to realize the anti-freezing protection of the cooling louver, and effectively avoid the safety impact on the inter-cooling tower and the generator set.

[0049] In order to make those skilled in the art better understand the application, the application will be further described in detail in combination with the drawings and the specific embodiments.

[0050] Figure 1 A flow chart of a control method for cooling louvers is provided for the embodiments of the present application, as shown in Figure 1 The control method for cooling louvers applied to an indirect air cooling tower, comprising:

[0051] S10: Obtain the current flow rate of circulating water in each tube bundle detected by a water flow sensor in the cooling triangle and the current temperature of circulating water in each tube bundle detected by a temperature sensor, and obtain the heat dissipation performance influencing factor data of the cooling triangle; wherein the heat dissipation performance influencing factor data includes environmental temperature, environmental wind speed, environmental wind direction, sector cold water mother pipe target water temperature and sector cold water mother pipe actual water temperature.

[0052] S11: If the current flow rate is lower than the flow rate threshold value and / or the current temperature is lower than the temperature threshold value, calculate the opening degree coefficient of the cooling louver according to the current flow rate, the current temperature and the heat dissipation performance influencing factor data.

[0053] S12: Determine the target opening degree of the cooling louver according to the opening degree coefficient, and reduce the opening degree of the louver to the target opening degree in the next control cycle.

[0054] In step S10, the cooling triangle is composed of two groups of heat dissipation surfaces and one group of louvers, each group of heat dissipation surface is composed of multiple tube bundles, and each sector contains multiple cooling triangles, each sector is equipped with a sector cold water mother pipe, and the sector cold water mother pipe is connected to each tube bundle in the cooling triangle through a branch pipe.

[0055] In step S11, if the current flow rate is lower than the flow rate threshold value and / or the current temperature is lower than the temperature threshold value, it indicates that there is a risk of freezing of circulating water in a cold environment, at which time the opening degree of the louver needs to be reduced to reduce the amount of cold air entering and increase the water temperature in the tube bundle to prevent freezing.

[0056] According to the current flow rate, the current temperature and the heat dissipation performance influencing factor data, the opening degree coefficient of the cooling louver is calculated, which specifically includes: calculating the current flow rate of each tube bundle according to the current flow rate and the cross-sectional area of the tube bundle; calculating the average flow rate of the tube bundle according to the circulating pump power, the power flow coefficient and the number of tube bundles of the cooling triangle; determining the flow error of each tube bundle according to the current flow rate and the average flow rate of the tube bundle, and determining the flow square error of the cooling triangle based on the flow error of each tube bundle; determining the tube bundle flow rate coefficient according to the flow square error of the cooling triangle and the flow rate coefficient; calculating the average flow rate of the tube bundle according to the current flow rate of the circulating water in each tube bundle, and determining the minimum value of the current flow rate of each tube bundle; calculating the opening degree coefficient according to the heat dissipation performance influencing factor data, the average flow rate of the tube bundle, the minimum value of the flow rate, the temperature coefficient, the wind speed coefficient, the louver position coefficient, the water temperature coefficient, the tube bundle flow rate coefficient and the tube bundle flow coefficient.

[0057] The current flow of each tube bundle is calculated according to the current flow rate and the tube bundle cross-sectional area, including: the current flow of each tube bundle is calculated according to a first preset formula; the first preset formula is: ; wherein F1 is the current flow, A is the tube bundle cross-sectional area, and S1 is the current flow rate. The calculation formula of the tube bundle cross-sectional area A is: ; D1 is the tube bundle inner diameter.

[0058] The average flow of the tube bundle is calculated according to the circulating pump power, the power flow coefficient, and the number of tube bundles of the cooling triangle, including: the average flow of the tube bundle is calculated according to a second preset formula; the second preset formula is: ; wherein F3 is the average flow of the tube bundle, E2 is the circulating pump power, K7 is the power flow coefficient, and N is the number of tube bundles.

[0059] The calculation formula of the flow error of each tube bundle is determined according to the current flow and the average flow of the tube bundle, that is, E1=F3-F1, wherein E1 is the flow error, F3 is the average flow of the tube bundle, and F1 is the current flow. The cooling triangle flow mean square error can be determined based on the existing calculation formula of the mean square error, which is not repeated here.

[0060] The tube bundle flow rate coefficient is determined according to the cooling triangle flow mean square error and the flow rate coefficient, including: the tube bundle flow rate coefficient is calculated according to a third preset formula; the third preset formula is: ; wherein C is the tube bundle flow rate coefficient, V is the cooling triangle flow mean square error, and K8 is the flow rate coefficient.

[0061] The opening coefficient is calculated according to the heat dissipation performance influencing factor data, the average tube bundle flow rate, the minimum flow, the temperature coefficient, the wind speed coefficient, the louver position coefficient, the water temperature coefficient, the tube bundle flow rate coefficient, and the tube bundle flow coefficient, including: the opening coefficient is calculated according to a fourth preset formula; the fourth preset formula is: ; wherein K1 is the opening coefficient, T3 is the ambient temperature, K2 is the temperature coefficient, S2 is the ambient wind speed, K3 is the wind speed coefficient, D2 is the ambient wind direction, K4 is the louver position coefficient, T1 is the target water temperature of the sector cold water mother pipe, T2 is the actual water temperature of the sector cold water mother pipe, K5 is the water temperature coefficient, S3 is the average tube bundle flow rate, C is the tube bundle flow rate coefficient, F2 is the minimum flow, and K6 is the tube bundle flow coefficient.

[0062] In step S12, how to determine the target opening of the cooling triangle louver according to the opening coefficient is described in detail as follows: a preset relationship table can be called to determine the target opening corresponding to the opening coefficient according to the preset relationship table; wherein the preset relationship table includes the corresponding relationship between the opening coefficient and the louver opening.

[0063] When the current flow rate is lower than the flow rate threshold value and / or the current temperature is lower than the temperature threshold value, the opening of the louvers is reduced to the target opening in the next control cycle, so as to reduce the amount of cold air entering, increase the water temperature in the tube bundle, and prevent freezing. Further, if the current temperature is higher than the temperature threshold value, the opening coefficient of the cooling triangular louver can be calculated according to the current flow rate, the current temperature and the heat dissipation performance influencing factor data; the target opening of the cooling triangular louver is determined according to the opening coefficient, and the opening of the louver is increased to the target opening in the next control cycle, so as to increase the heat dissipation amount and rapidly cool the circulating water.

[0064] The control method of the cooling triangular louver provided in the present application comprises: obtaining the current flow rate of each tube bundle circulating water detected by a cooling triangular water flow sensor and the current temperature of each tube bundle circulating water detected by a temperature sensor, and obtaining heat dissipation performance influencing factor data of the cooling triangular louver; wherein the heat dissipation performance influencing factor data comprises environmental temperature, environmental wind speed, environmental wind direction, sector cold water mother pipe target water temperature and sector cold water mother pipe actual water temperature; if the current flow rate is lower than the flow rate threshold value and / or the current temperature is lower than the temperature threshold value, the opening coefficient of the cooling triangular louver is calculated according to the current flow rate, the current temperature and the heat dissipation performance influencing factor data; the target opening of the cooling triangular louver is determined according to the opening coefficient, and the opening of the louver is reduced to the target opening in the next control cycle. By monitoring the current flow rate and the current temperature of each tube bundle circulating water, and dynamically calculating the louver opening coefficient in combination with the environmental temperature, the environmental wind speed, the environmental wind direction, the sector cold water mother pipe target water temperature and the sector cold water mother pipe actual water temperature, the louver opening can be actively reduced when the current flow rate and / or the current temperature is low, the ventilation amount is reduced, the heat dissipation is reduced, the freezing of the circulating water is effectively prevented, the reliable anti-freezing protection of the cooling triangular louver is realized, the safety influence on the intercooling tower and the generator set is effectively avoided, and the safety and reliability of the intercooling tower operation are improved.

[0065] In addition, the opening coefficient of the cooling triangular louver is calculated according to the current flow rate, the current temperature and the heat dissipation performance influencing factor data; the target opening of the cooling triangular louver is determined according to the opening coefficient, which can effectively avoid the excessive or insufficient reduction of the louver opening compared with the adjustment of the louver opening based on artificial experience, and realize the precise quantitative control of the louver opening.

[0066] Figure 2 The structure diagram of the control system of the cooling triangular louver provided in the embodiment of the present application is as shown in Figure 2As shown, a control system of a cooling delta fin includes a plurality of water flow sensors, a plurality of temperature sensors, an environment monitoring device and a data processing device; the water flow sensors and the temperature sensors are arranged on the tube bundle of the cooling delta 1, the environment monitoring device is used to detect the ambient temperature, the ambient wind speed and the ambient wind direction, and the data processing device is connected with the water flow sensors, the temperature sensors and the actuator 7 of the cooling delta 1 fin respectively, and is used to execute the steps of the control method of the cooling delta 1 fin.

[0067] In the embodiment of the present application, Figure 2 The sensor assembly 2 in the cooling delta fin is integrated with the water flow sensor and the temperature sensor; the data processing device includes a server 5, a gateway 4 and a distributed control system 6 (DCS), the water flow sensor is a Hall flowmeter, the server 5 is connected with the gateway 4 and the DCS respectively, the gateway 4 is connected with the Hall flowmeter and the temperature sensor respectively, and the DCS is connected with the actuator 7. The gateway 4 is connected with the sensor assembly 2 through the data acquisition cable 3, the actuator 7 can be a motor for driving the fin to move, and the environment monitoring device can be a weather station arranged outside the intercooling tower and capable of accurately reflecting the environmental conditions around the tower. By arranging the water flow sensor and the temperature sensor on each tube bundle of the cooling delta 1, the flow rate and temperature data in the tube bundle are collected in real time, the data are transmitted to the gateway 4 through the data acquisition cable 3, at the same time, the server 5 system also acquires the target water temperature and the actual water temperature of the sector cold water mother pipe from the DCS, and acquires the ambient temperature, the ambient wind speed and the ambient wind direction collected by the environment monitoring device, and receives the data collected by the gateway 4; the server 5 calculates the target opening degree of the fin according to the built-in control algorithm, outputs the target opening degree to the DCS, and drives the actuator 7 to adjust, so as to realize the precise control of the opening degree of the cooling delta 1 fin, and to realize the anti-freezing protection.

[0068] Figure 3 A structural diagram of a control device of a cooling delta fin provided in the embodiment of the present application is shown in Figure 3 As shown, the control device of the cooling delta fin includes a memory 20 for storing a computer program and a processor 21 for executing the computer program to realize the steps of the control method of the cooling delta fin according to the above embodiment.

[0069] The control device of the cooling delta fin provided in the embodiment can include but is not limited to a smart phone, a tablet computer, a notebook computer or a desktop computer and the like.

[0070] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which handles computational operations related to machine learning.

[0071] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the control method for the cooling triangular louvers disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc. The data 203 may include, but is not limited to, current flow rate, current temperature, and data on factors affecting heat dissipation efficiency.

[0072] In some embodiments, the control device for cooling triangular louvers may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0073] Those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on the control device for cooling triangular louvers and may include more or fewer components than shown.

[0074] The control device for cooling louvers provided by the embodiments of the present application comprises a memory and a processor. When the processor executes a program stored in the memory, the following method can be implemented: obtaining current flow rates of circulating water in each tube bundle detected by a water flow sensor in the cooling triangle, current temperatures of the circulating water in each tube bundle detected by a temperature sensor, and data of factors affecting heat dissipation efficiency of the cooling triangle; wherein the data of factors affecting heat dissipation efficiency of the cooling triangle comprises environmental temperature, environmental wind speed, environmental wind direction, target water temperature of the sector cold water mother pipe, and actual water temperature of the sector cold water mother pipe; if the current flow rate is lower than a flow rate threshold value and / or the current temperature is lower than a temperature threshold value, calculating an opening degree coefficient of the cooling louver according to the current flow rate, the current temperature, and the data of factors affecting heat dissipation efficiency of the cooling triangle; determining a target opening degree of the cooling louver according to the opening degree coefficient, and reducing the opening degree of the louver to the target opening degree in the next control cycle.

[0075] Finally, the present application also provides an embodiment corresponding to a computer readable storage medium. The computer readable storage medium stores a computer program. When the computer program is executed by a processor, the steps described in the control method of the cooling louver are implemented.

[0076] It can be understood that if the method in the above embodiments is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and executes all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0077] The control method, control system, control device and medium for cooling louvers provided by the present application are described in detail above. The embodiments in the specification are described in a progressive manner, and each embodiment mainly describes the differences from other embodiments. The same or similar parts of each embodiment can be referred to. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, it is described simply. The relevant parts are described in the method part. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0078] It also needs to be explained that in the present specification, the relational terms such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A method for controlling the cooling of triangular louvers, characterized in that, include: The current flow rate of circulating water in each tube bundle detected by the water flow sensor and the current temperature of circulating water in each tube bundle detected by the temperature sensor are obtained, as well as the data on factors affecting the heat dissipation performance of the cooling triangle are obtained; wherein, the data on factors affecting the heat dissipation performance include ambient temperature, ambient wind speed, ambient wind direction, target water temperature of the sector cold water header and actual water temperature of the sector cold water header. If the current flow rate is lower than the flow rate threshold and / or the current temperature is lower than the temperature threshold, the opening coefficient of the cooling triangular louver is calculated based on the current flow rate, the current temperature and the data on factors affecting heat dissipation efficiency. The target opening of the cooling triangular louver is determined based on the opening coefficient, and the opening of the louver is reduced to the target opening in the next control cycle.

2. The control method for cooling triangular louvers according to claim 1, characterized in that, The opening coefficient of the cooling triangular louvers is calculated based on the current flow rate, the current temperature, and the data on factors affecting heat dissipation efficiency, including: Calculate the current flow rate of each tube bundle based on the current flow velocity and the cross-sectional area of ​​the tube bundle; The average flow rate of the tube bundle is calculated based on the circulating pump power, power flow coefficient, and the number of tube bundles in the cooling triangle. The flow error of each tube bundle is determined based on the current flow rate and the average flow rate of the tube bundle, and the mean square error of the cooling triangle flow rate is determined based on the flow error of each tube bundle. The tube bundle velocity coefficient is determined based on the mean square error of the cooling triangle flow rate and the velocity coefficient. Calculate the average flow velocity of each tube bundle based on the current flow velocity of the circulating water in each tube bundle, and determine the minimum flow rate among the current flow rates of each tube bundle. The opening coefficient is calculated based on the data of factors affecting heat dissipation efficiency, the average flow velocity of the tube bundle, the minimum flow rate, the temperature coefficient, the wind speed coefficient, the louver position coefficient, the water temperature coefficient, the tube bundle flow velocity coefficient, and the tube bundle flow rate coefficient.

3. The control method for cooling triangular louvers according to claim 2, characterized in that, The current flow rate of each tube bundle is calculated based on the current flow velocity and the cross-sectional area of ​​the tube bundle, including: The current flow rate of each tube bundle is calculated according to the first preset formula; The first preset formula is: ; Wherein, F1 is the current flow rate, A is the cross-sectional area of ​​the tube bundle, and S1 is the current flow velocity.

4. The control method for cooling triangular louvers according to claim 2, characterized in that, The average flow rate of the tube bundle is calculated based on the circulating pump power, power-flow coefficient, and the number of tubes in the cooling triangle, including: The average flow rate of the tube bundle is calculated according to the second preset formula; The second preset formula is: ; Wherein, F3 is the average flow rate of the tube bundle, E2 is the power of the circulating pump, K7 is the power-flow coefficient, and N is the number of tube bundles.

5. The control method for cooling triangular louvers according to claim 2, characterized in that, The tube bundle velocity coefficient is determined based on the mean square error of the cooling triangle flow rate and the velocity coefficient, including: The tube bundle velocity coefficient is calculated according to the third preset formula; The third preset formula is: ; Wherein, C is the tube bundle velocity coefficient, V is the cooling triangle flow rate mean square error, and K8 is the velocity coefficient.

6. The control method for cooling triangular louvers according to claim 2, characterized in that, The opening coefficient is calculated based on the data of factors affecting heat dissipation efficiency, the average flow velocity of the tube bundle, the minimum flow rate, the temperature coefficient, the wind speed coefficient, the louver position coefficient, the water temperature coefficient, the tube bundle flow velocity coefficient, and the tube bundle flow rate coefficient, including: The opening coefficient is calculated according to the fourth preset formula; The fourth preset formula is: ; Wherein, K1 is the opening coefficient, T3 is the ambient temperature, K2 is the temperature coefficient, S2 is the ambient wind speed, K3 is the wind speed coefficient, D2 is the ambient wind direction, K4 is the louver position coefficient, T1 is the target water temperature of the sector cold water header, T2 is the actual water temperature of the sector cold water header, K5 is the water temperature coefficient, S3 is the average flow velocity of the tube bundle, C is the flow velocity coefficient of the tube bundle, F2 is the minimum flow rate, and K6 is the flow rate coefficient of the tube bundle.

7. A control system for cooling triangular louvers, characterized in that, include: Multiple water flow sensors, multiple temperature sensors, environmental monitoring equipment, and data processing equipment; Both the water flow sensor and the temperature sensor are mounted on the tube bundle of the cooling triangle. The environmental monitoring device is used to detect the ambient temperature, ambient wind speed, and ambient wind direction. The data processing device is connected to the water flow sensor, the temperature sensor, and the actuator of the cooling triangle louver. The data processing device is used to execute the steps of the control method for the cooling triangle louver according to any one of claims 1 to 6.

8. The control system for the cooling triangular louver according to claim 7, characterized in that, The data processing device includes a server, a gateway, and a DCS. The water flow sensor is a Hall effect flow meter. The server is connected to the gateway and the DCS. The gateway is connected to the Hall effect flow meter and the temperature sensor. The DCS is connected to the actuator.

9. A control device for cooling triangular louvers, characterized in that, Includes memory used to store computer programs; A processor, configured to execute the computer program to implement the steps of the control method for cooling triangular louvers as described in any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the control method for cooling triangular louvers as described in any one of claims 1 to 6.

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