Condenser cooling water flow refined control method and device

Abstract

The present invention discloses a method and device for fine-tuning the flow rate of cooling water in a condenser, wherein the control method is applied to a controller in a control system, wherein the control system further comprises a circulating water pump, a condenser, a regulating valve, a power switch, a temperature sensor, and a pressure sensor, wherein the controller is electrically connected to the circulating water pump, the regulating valve, the power switch, the temperature sensor, and the pressure sensor, respectively. The control method comprises: setting a critical operating pressure of the condenser; setting a minimum stable speed r of the circulating water pump; min ; Set multiple seawater critical temperatures, wherein the multiple seawater critical temperatures include a first seawater critical temperature t a , the second critical temperature of seawater t b , the third critical temperature of seawater t c and the fourth critical temperature of seawater t d The technical solution of the embodiment of the present invention can ensure the precise operation of the condenser, which is of great significance to the energy efficiency, safety and reliability of steam-powered ships.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of digital control technology for ships, and in particular to a method and device for finely controlling the flow rate of cooling water in a condenser. Background Art

[0002] The condenser is a core component of steam-powered vessels. It uses seawater to condense low-pressure wet steam from the turbine into water, completing the thermodynamic cycle. The condenser's operating pressure determines the turbine's exhaust pressure, which in turn affects the turbine's operating efficiency and safety. Excessively high exhaust pressure reduces turbine output power; excessively low exhaust pressure increases exhaust humidity, causing small droplets in the steam to strike the turbine blades, potentially causing wear or even breakage. Summary of the Invention

[0003] The embodiments of the present invention provide a method and device for finely controlling the cooling water flow of a condenser, which can ensure the precise operation of the condenser and is of great significance to the energy efficiency, safety and reliability of steam-powered ships.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a method for finely controlling the flow rate of cooling water in a condenser, which is applied to a controller of a control system, wherein the control system further includes a circulating water pump, a condenser, a regulating valve, a power switch, a temperature sensor, and a pressure sensor, and the controller is electrically connected to the circulating water pump, the regulating valve, the power switch, the temperature sensor, and the pressure sensor, respectively. The method for finely controlling the flow rate of cooling water in a condenser comprises:

[0005] Step S100, setting the critical operating pressure of the condenser;

[0006] Step S200, setting the minimum stable speed of the circulating water pump r min ;

[0007] Step S300: setting a plurality of critical seawater temperatures, wherein the plurality of critical seawater temperatures include a first critical seawater temperature t a , the second critical temperature of seawater t b , the third critical temperature of seawater t c and the fourth critical temperature of seawater t d ;

[0008] Step S400, determining the third critical seawater temperature t c Is it greater than the second critical temperature of seawater t b 、;

[0009] Step S500: If the result is greater than, the temperature of the seawater t1 and the condenser pressure P sThe circulating water pump and the regulating valve are controlled accordingly.

[0010] In one embodiment of the present invention, the step S400 further includes:

[0011] If the judgment result is not greater than, return to reset the critical operating pressure of the condenser and reset the minimum stable speed of the circulating water pump r min .

[0012] In one embodiment of the present invention, the condenser operation critical pressure includes a first critical pressure P a and the second critical pressure P b .

[0013] In one embodiment of the present invention, if the judgment result is greater than, according to the seawater temperature t1 and the condenser pressure P s The corresponding control of the circulating water pump and the regulating valve includes:

[0014] When the seawater temperature t1> the first seawater critical temperature t a When the circulating water pump speed is higher than the minimum stable speed r of the circulating water pump min Operation, adjust the regulating valve opening to 100%, when the condenser pressure P s Exceeding the first critical pressure P a When the circulating water pump speed is increased, the condenser pressure P s = the first critical pressure P a ;

[0015] When the first critical temperature of seawater t a ≥Seawater temperature t1 ≥ The third critical seawater temperature t c When the circulating water pump is at the lowest stable speed r min Run, adjust the opening of the regulating valve to 100%, at this time the second critical pressure P b <The condenser pressure P s <First critical pressure P a ;

[0016] When the third critical temperature of seawater t c >Seawater temperature t1 >Second critical seawater temperature t b When the previous state remains unchanged, the second critical pressure P b <Condenser pressure P s <First critical pressure P a ;

[0017] When the second critical temperature of seawater t b ≥Seawater temperature t1 ≥ Fourth seawater critical temperature t dWhen the circulating water pump stops, the regulating valve opening is adjusted to 100%. At this time, the second critical pressure P b ≤Condenser pressure P s <First critical pressure P a ;

[0018] When the seawater temperature t1 < the fourth seawater critical temperature t d When the regulating valve opening is reduced, the condenser pressure P s = Second critical pressure P b .

[0019] In a second aspect, the present invention provides a device for fine-tuning the flow rate of cooling water in a condenser, comprising: a first setting module, a second setting module, a third setting module, a judgment module, and an operation module. The first setting module is used to set the critical operating pressure of the condenser. The second setting module is used to set the minimum stable speed r of the circulating water pump. min The third setting module is used to set multiple seawater critical temperatures, wherein the multiple seawater critical temperatures include a first seawater critical temperature t a , the second critical temperature of seawater t b , the third critical temperature of seawater t c and the fourth critical temperature of seawater t d The judgment module is used to judge the third critical temperature of seawater t c Is it greater than the second critical temperature of seawater t b The operation module is used to determine whether the result is greater than the seawater temperature t1 and the condenser pressure P s The circulating water pump and the regulating valve are controlled accordingly.

[0020] In one embodiment of the present invention, the condenser cooling water flow refined control device further includes a return module for returning to reset the condenser operation critical pressure and reset the circulating water pump minimum stable speed r if the judgment result is not greater than min .

[0021] In one embodiment of the present invention, the condenser operation critical pressure includes a first critical pressure P a and the second critical pressure P b .

[0022] In one embodiment of the present invention, the operation module includes a first adjustment unit, a second adjustment unit, a holding unit, a third adjustment unit and a reduction unit. The first adjustment unit is used to adjust the temperature of the seawater when the seawater temperature t1 is greater than the first critical seawater temperature t a When the circulating water pump speed is higher than the minimum stable speed r of the circulating water pump min Operation, adjust the regulating valve opening to 100%, when the condenser pressure Ps Exceeding the first critical pressure P a When the circulating water pump speed is increased, the condenser pressure P s = the first critical pressure P a The second regulating unit is used for when the first critical temperature of seawater t a ≥Seawater temperature t1 ≥ The third critical seawater temperature t c When the circulating water pump is at the lowest stable speed r min Run, adjust the opening of the regulating valve to 100%, at this time the second critical pressure P b <The condenser pressure P s <First critical pressure P a The holding unit is used when the third critical temperature of seawater t c >Seawater temperature t1 >Second critical seawater temperature t b When the previous state remains unchanged, the second critical pressure P b <Condenser pressure P s <First critical pressure P a The third regulating unit is used to adjust the temperature of the second seawater to b ≥Seawater temperature t1 ≥ Fourth seawater critical temperature t d When the circulating water pump stops, the regulating valve opening is adjusted to 100%. At this time, the second critical pressure P b ≤Condenser pressure P s <First critical pressure P a The reducing unit is used when the seawater temperature t1 is less than the fourth seawater critical temperature t d When the regulating valve opening is reduced, the condenser pressure P s = Second critical pressure P b .

[0023] In a third aspect, the present invention provides an electronic device, comprising:

[0024] at least one processor; and

[0025] a memory communicatively coupled to the at least one processor;

[0026] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned method for fine-tuning the control of the condenser cooling water flow.

[0027] In a fourth aspect, the present invention provides a computer-readable storage medium comprising a computer program and instructions, which, when executed on a computer, enables the computer to execute the method for fine-tuning the condenser cooling water flow rate as described above.

[0028] Compared with the existing technology, the method and device for fine-tuning the condenser cooling water flow rate according to the present invention can coordinate the control of the circulating water pump and the regulating valve, thereby finely controlling the cooling water flow rate, ensuring that the condenser can operate within the design pressure range under different marine environments, and has high engineering value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of a method for finely controlling the cooling water flow rate of a condenser in the first embodiment of the present invention;

[0030] Figure 2 This is a schematic structural diagram of a device for finely controlling the flow rate of cooling water for a condenser in a second embodiment of the present invention;

[0031] Figure 3 is a schematic structural diagram of the control system in Embodiments 1 and 2 of the present invention;

[0032] Figure 4 This is a schematic structural diagram of an electronic device in Embodiment 3 of the present invention;

[0033] Figure 5 It is a logic flow diagram of a method for finely controlling the cooling water flow of a condenser according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions of the embodiments of the present invention, rather than all structures.

[0035] Example 1

[0036] Figure 1 This is a flow chart of a method for finely controlling the cooling water flow of a condenser in the first embodiment of the present invention. Figure 1 As shown, the first embodiment provides a method for finely controlling the flow rate of cooling water in a condenser, which is applied to a controller in a control system, such as Figure 3As shown, the control system further includes a circulating water pump 301, a condenser 302, a regulating valve 303, a power switch 307, a temperature sensor 304 and a pressure sensor 305. The controller 306 is electrically connected to the circulating water pump 301, the regulating valve 303, the power switch 307, the temperature sensor 304 and the pressure sensor 305 respectively. The method for finely controlling the cooling water flow of the condenser includes:

[0037] Step S100, setting the critical operating pressure of the condenser;

[0038] Step S200, setting the minimum stable speed of the circulating water pump r min ;

[0039] Step S300: setting a plurality of critical seawater temperatures, wherein the plurality of critical seawater temperatures include a first critical seawater temperature t a , the second critical temperature of seawater t b , the third critical temperature of seawater t c and the fourth critical temperature of seawater t d ;

[0040] Step S400, determining the third critical seawater temperature t c Is it greater than the second critical temperature of seawater t b 、;

[0041] Step S500: If the result is greater than, the temperature of the seawater t1 and the condenser pressure P s The circulating water pump 301 and the regulating valve 303 are controlled accordingly.

[0042] In this embodiment, the step S400 further includes:

[0043] If the judgment result is not greater than, return to reset the critical operating pressure of the condenser and reset the minimum stable speed of the circulating water pump r min .

[0044] In this embodiment, the condenser operation critical pressure includes the first critical pressure P a and the second critical pressure P b .

[0045] In this embodiment, if the judgment result is greater than, according to the seawater temperature t1 and the condenser pressure P s The corresponding control of the circulating water pump 301 and the regulating valve 303 includes:

[0046] When the seawater temperature t1> the first seawater critical temperature t a When the circulating water pump speed is higher than the minimum stable speed r of the circulating water pump minOperation, adjust the opening of the regulating valve 303 to 100%, when the condenser pressure P s Exceeding the first critical pressure P a When the circulating water pump speed is increased, the condenser pressure P s = the first critical pressure P a ;

[0047] When the first critical temperature of seawater t a ≥Seawater temperature t1 ≥ The third critical seawater temperature t c When the circulating water pump 301 is at the lowest stable speed r min Run, adjust the opening of the regulating valve 303 to 100%, at this time the second critical pressure P b <The condenser pressure P s <First critical pressure P a ;

[0048] When the third critical temperature of seawater t c >Seawater temperature t1 >Second critical seawater temperature t b When the previous state remains unchanged, the second critical pressure P b <Condenser pressure P s <First critical pressure P a ;

[0049] When the second critical temperature of seawater t b ≥Seawater temperature t1 ≥ Fourth seawater critical temperature t d When the circulating water pump stops, the regulating valve 303 is opened to 100%. At this time, the second critical pressure P b ≤Condenser pressure P s <First critical pressure P a ;

[0050] When the seawater temperature t1 < the fourth seawater critical temperature t d When the opening of the regulating valve 303 is reduced, the condenser pressure P s = Second critical pressure P b .

[0051] Figure 5 FIG. 1 is a logic flow diagram of a method for finely controlling the cooling water flow rate of a condenser according to a specific embodiment of the present invention. Figure 5 As shown, in a specific embodiment of the present invention, a method for fine-grained control of condenser cooling water flow is provided to meet the demand for fine-grained control of condenser cooling water flow, which is applied to a controller 306 of a control system. The control method ensures that the condenser pressure is maintained within the designed operating range at any seawater temperature by coordinating the start and stop of the circulating water pump, the speed of the circulating water pump, and the opening of the flow control valve. Figure 3 As shown, the control system includes a circulating water pump 301, a condenser 302, a regulating valve 303, a controller 306, a power switch 307, a temperature sensor 304, and a pressure sensor 305. The controller 306 controls the start and stop of the circulating water pump and the speed change. At the same time, the controller 306 controls the opening of the regulating valve 303. The controller 306 is electrically connected to the power switch 307, the circulating water pump 301, the regulating valve 303, the temperature sensor 304, and the pressure sensor 305 respectively. Wherein, the power switch 307 is electrically connected to the circulating water pump 301 and the ship's power grid for providing power; wherein, the temperature sensor 304 is arranged on the pipeline between the water inlet and the circulating water pump 301 for real-time monitoring of the water temperature and transmitting the monitoring results to the controller 306; wherein, the pressure sensor 305 is arranged on the condenser 302 for real-time monitoring of the pressure and transmitting the monitoring results to the controller 306; wherein, the regulating valve 303 is connected to the condenser 302.

[0052] In this specific embodiment, the method for finely controlling the condenser cooling water flow rate includes:

[0053] Step 1: Set the critical operating pressure of the condenser, including the first critical pressure P a and the second critical pressure P b , and P a >P b ;

[0054] Step 2: Set the minimum stable speed of the circulating water pump r min ;

[0055] Step 3: Set the critical temperature of seawater, including the first critical temperature of seawater t a , the second critical temperature of seawater t b , the third critical temperature of seawater t c and the fourth critical temperature of seawater t d , the critical temperatures are defined as follows:

[0056] 1. The circulating water pump 301 is at the lowest stable speed r min Operation, regulating valve 303 opening 100%, condenser pressure is P a , the corresponding water temperature at this time is the first critical temperature of seawater t a ;

[0057] 2. The circulating water pump 301 is at the lowest stable speed r min Operation, regulating valve 303 opening 100%, condenser pressure is P b , the corresponding water temperature at this time is the second critical temperature of seawater t b ;

[0058] 3. The circulating water pump 301 stops and starts to run, the regulating valve 303 is opened 100%, and the condenser pressure is P a , the corresponding water temperature at this time is the third critical temperature of seawater t c ;

[0059] 4. The circulating water pump 301 stops and starts to run, the regulating valve 303 is opened 100%, and the condenser pressure is P b , the corresponding water temperature at this time is the fourth seawater critical temperature t d .

[0060] Step 4: If t c >t b , go to step 5; otherwise, return to step 1 and reset the minimum stable speed r of the circulating water pump min , condenser first critical pressure P a and the second critical pressure P b .

[0061] According to the fact that the condenser pressure decreases with the increase of circulating water flow and increases with the increase of seawater temperature, there is a relationship t a >t b >t d , t a >t c >t d , when t c >t b When t a >t c >t b >t d In particular, to ensure the stability of the refined control of cooling water flow, t c >t b +1℃.

[0062] Step 5: Based on the seawater temperature t1 measured by the temperature sensor 304 and the condenser pressure P measured by the pressure sensor 305, s , perform corresponding operations (corresponding control) on the circulating water pump 301 and the regulating valve 303:

[0063] (1) When t1>t a , the circulating water pump speed is higher than the minimum stable speed r min Operation, regulating valve 303 opening 100%, when condenser pressure P s Exceeding the first critical value P a When the circulating water pump speed is increased, ensure that it does not exceed P a , that is, P s =P a ;

[0064] (2) When ta ≥t1≥t c , the circulating water pump 301 is at the lowest stable speed r min Operation, regulating valve 303 opening 100%, at this time P b <P s ≤P a ;

[0065] (3) When t c >t1>t b , keep the previous state unchanged, at this time, P b <P s <P a ;

[0066] (4) When t b ≥t1≥t d , the circulating water pump 301 stops, the regulating valve 303 opens 100%, and P b ≤P s <P a ;

[0067] (5) When t1 <t d , the circulating water pump 301 stops, and the opening of the regulating valve 303 is reduced. At this time, P s =P b .

[0068] In step 5, the specific meaning of keeping the state unchanged in step (3) is:

[0069] The previous state is that the circulating water pump 301 is at the lowest stable speed r min Operation, the regulating valve 303 is opened 100%, and this state is maintained;

[0070] The previous state is that the circulating water pump is shut down and the regulating valve 303 is opened 100%, and this state continues to be maintained.

[0071] In practical applications, the operation steps are explained in detail by taking the water temperature in a certain navigation area as an example and explaining the operation steps in detail.

[0072] As the temperature of the navigation area continues to rise, the opening states of the circulating water pump 301 and the regulating valve 303 are:

[0073] (1) When t1 <t d , the circulating water pump stops and the opening of the regulating valve 303 is less than 100%;

[0074] (2) When t c >t1≥t d , keep the circulating water pump stopped and the regulating valve 303 open 100%;

[0075] (3) When t a ≥t1≥tc , the circulating water pump 301 is at the lowest stable speed r min Operation, regulating valve 303 opening 100%;

[0076] (4) When t1>t a , the circulating water pump 301 runs at a speed greater than the minimum stable speed, and the regulating valve 303 is opened 100%.

[0077] That is, at t1=t c The circulating water pump 301 is switched from shutdown to startup, t c >t1>t b The circulating water pump 301 within the range is in shutdown state.

[0078] As the temperature of the navigation area continues to drop, the opening states of the circulating water pump 301 and the regulating valve 303 are:

[0079] (1) When t1>t a , the circulating water pump 301 runs at a speed greater than the minimum stable speed, and the regulating valve 303 is opened 100%;

[0080] (2) When t a ≥t1>t b , the circulating water pump 301 is turned on at the lowest stable speed r min Operation, regulating valve 303 opening 100%;

[0081] (3) When t b ≥t1≥t d , the circulating water pump stops and the opening of the regulating valve 303 is less than 100%;

[0082] (4) When t1 <t d , the circulating water pump stops and the opening of the regulating valve 303 is less than 100%;

[0083] That is, at t1=t b The circulating water pump 301 switches from start to stop, t c >t1>t b The circulating water pump 301 is at the lowest stable speed r min Running status.

[0084] Example 2

[0085] Figure 2 This is a schematic diagram of a structure of a device for finely controlling the flow of cooling water for a condenser in the second embodiment of the present invention. Figure 2As shown, the second embodiment provides a device for fine-tuning the flow rate of cooling water for a condenser, comprising: a first setting module 201, a second setting module 202, a third setting module 203, a judgment module 204, and an operation module 205. The first setting module 201 is used to set the critical operating pressure of the condenser. The second setting module 202 is used to set the minimum stable speed r of the circulating water pump. min The third setting module 203 is used to set multiple seawater critical temperatures, wherein the multiple seawater critical temperatures include a first seawater critical temperature t a , the second critical temperature of seawater t b , the third critical temperature of seawater t c and the fourth critical temperature of seawater t d The judgment module 204 is used to judge the third critical seawater temperature t c Is it greater than the second critical temperature of seawater t b The operation module 205 is used to, if the judgment result is greater than, according to the seawater temperature t1 and the condenser pressure P s The circulating water pump 301 and the regulating valve 303 are controlled accordingly.

[0086] In this embodiment, the condenser cooling water flow refined control device further includes a return module for returning to reset the condenser operation critical pressure and reset the circulating water pump minimum stable speed r if the judgment result is not greater than min .

[0087] In this embodiment, the condenser operation critical pressure includes the first critical pressure P a and the second critical pressure P b .

[0088] In this embodiment, the operation module 205 includes a first adjustment unit, a second adjustment unit, a holding unit, a third adjustment unit and a reduction unit. The first adjustment unit is used to adjust the temperature of the seawater when the seawater temperature t1 is greater than the first critical seawater temperature t a When the circulating water pump speed is higher than the minimum stable speed r of the circulating water pump min Operation, adjust the opening of the regulating valve 303 to 100%, when the condenser pressure P s Exceeding the first critical pressure P a When the circulating water pump speed is increased, the condenser pressure P s = the first critical pressure P a The second regulating unit is used for when the first critical temperature of seawater t a ≥Seawater temperature t1 ≥ The third critical seawater temperature t c When the circulating water pump 301 is at the lowest stable speed r minRun, adjust the opening of the regulating valve 303 to 100%, at this time the second critical pressure P b <The condenser pressure P s <First critical pressure P a The holding unit is used when the third critical temperature of seawater t c >Seawater temperature t1 >Second critical seawater temperature t b When the previous state remains unchanged, the second critical pressure P b <Condenser pressure P s <First critical pressure P a The third regulating unit is used to adjust the temperature of the second seawater to b ≥Seawater temperature t1 ≥ Fourth seawater critical temperature t d When the circulating water pump stops, the regulating valve 303 is opened to 100%. At this time, the second critical pressure P b ≤Condenser pressure P s <First critical pressure P a The reducing unit is used when the seawater temperature t1 is less than the fourth seawater critical temperature t d When the opening of the regulating valve 303 is reduced, the condenser pressure P s = Second critical pressure P b .

[0089] The various variations and specific examples of the method for fine-tuning the condenser cooling water flow rate provided in Example 1 are also applicable to the device for fine-tuning the condenser cooling water flow rate provided in this embodiment. Through the above detailed description of a method for fine-tuning the condenser cooling water flow rate, those skilled in the art can clearly know the implementation method of fine-tuning the condenser cooling water flow rate in this embodiment, so for the sake of brevity of the specification, it will not be described in detail here.

[0090] Example 3

[0091] Figure 4 This is a schematic diagram of the structure of an electronic device in the third embodiment of the present invention. Figure 4 As shown, the third embodiment further provides an electronic device 400 , which may include: a processor 401 and a memory 402 .

[0092] Memory 402 is used to store programs. Memory 402 may include volatile memory (volatile memory), such as random access memory (RAM), such as static random access memory (SRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), etc. Memory may also include nonvolatile memory (nonvolatile memory), such as flash memory. Memory 402 is used to store computer programs (such as applications, functional modules, etc. that implement the above-mentioned methods), computer instructions, etc. The above-mentioned computer programs, computer instructions, etc. may be partitioned and stored in one or more memories 402. Moreover, the above-mentioned computer programs, computer instructions, data, etc. can be called by processor 401.

[0093] The aforementioned computer programs, computer instructions, etc. may be partitioned and stored in one or more memories 402 . Furthermore, the aforementioned computer programs, computer instructions, etc. may be called by the processor 401 .

[0094] The processor 401 is configured to execute the computer program stored in the memory 402 to implement the various steps in the method involved in the above embodiment.

[0095] For details, please refer to the relevant description in the previous method embodiment.

[0096] The processor 401 and the memory 402 may be independent structures or integrated structures. When the processor 401 and the memory 402 are independent structures, the memory 402 and the processor 401 may be coupled via a bus 403 .

[0097] The electronic device of this embodiment can execute the technical solution in the above method. Its specific implementation process and technical principles are the same and will not be repeated here.

[0098] Example 4

[0099] Embodiment 4 further provides a computer-readable storage medium, comprising a computer program and instructions. When the computer program or instructions are executed on a computer, the computer executes the method for fine-tuning the condenser cooling water flow rate according to any embodiment of the present invention.

[0100] Computer-readable storage media include: USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks, and other media that can store program codes.

[0101] This embodiment also provides a computer program product, which includes: a computer program, which is stored in a readable storage medium. At least one processor of an electronic device can read the computer program from the readable storage medium, and at least one processor executes the computer program so that the electronic device executes the solution provided by any of the above embodiments.

[0102] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved. This is not limited herein.

[0103] In summary, the method and device for fine-tuning the condenser cooling water flow rate of the present invention can coordinate the control of the circulating water pump and the regulating valve, thereby finely controlling the cooling water flow rate, ensuring that the condenser can operate within the design pressure range under different marine environments, and has high engineering value.

[0104] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for finely controlling the flow rate of cooling water for a condenser, applied to a controller in a control system, wherein the control system further comprises a circulating water pump, a condenser, a regulating valve, a power switch, a temperature sensor, and a pressure sensor, wherein the controller is electrically connected to the circulating water pump, the regulating valve, the power switch, the temperature sensor, and the pressure sensor, respectively, and characterized in that: The method for finely controlling the condenser cooling water flow rate includes: Step S100, setting the critical operating pressure of the condenser, wherein the critical operating pressure of the condenser includes a first critical pressure P for controlling the speed of the circulating water pump. a and the second critical pressure P for controlling the opening of the regulating valve b ; Step S200, setting the minimum stable speed of the circulating water pump r min , as the reference value for the circulating water pump speed control; Step S300, setting multiple critical seawater temperatures, including: the circulating water pump is set at the lowest stable speed r of the circulating water pump. min Operation and condenser pressure is P a The first critical temperature of seawater corresponding to a , the circulating water pump is at the lowest stable speed r min Operation and condenser pressure is P b The second critical temperature of seawater corresponding to b , the circulating water pump stops and the condenser pressure is P a The third critical temperature of seawater corresponding to c , the circulating water pump stops and the condenser pressure is P b The fourth critical temperature of seawater corresponding to d ; Step S400, verifying the third critical seawater temperature t c Is it greater than the second critical temperature of seawater t b ; Step S500: If the third critical seawater temperature t c Greater than the second critical temperature of seawater t b , then the cooling water flow control operation is performed: according to the seawater temperature t1 collected by the temperature sensor and the condenser pressure P collected by the pressure sensor s , coordinate and control the circulating water pump and the regulating valve according to the following rules: When the seawater temperature t1> the first seawater critical temperature t a When the circulating water pump speed is higher than the minimum stable speed r of the circulating water pump min Operation, adjust the regulating valve opening to 100%, when the condenser pressure P s Exceeding the first critical pressure P a When the circulating water pump speed is increased, the condenser pressure P s = the first critical pressure P a ; When the first critical temperature of seawater t a ≥Seawater temperature t1 ≥ The third critical seawater temperature t c When the circulating water pump is at the lowest stable speed r min Run, adjust the opening of the regulating valve to 100%, at this time the second critical pressure P b <The condenser pressure P s <First critical pressure P a ; When the third critical temperature of seawater t c >Seawater temperature t1 >Second critical seawater temperature t b When the previous state remains unchanged, the second critical pressure P b <Condenser pressure P s <First critical pressure P a ; When the second critical temperature of seawater t b ≥Seawater temperature t1 ≥ Fourth seawater critical temperature t d When the circulating water pump stops, the regulating valve opening is adjusted to 100%. At this time, the second critical pressure P b ≤Condenser pressure P s <First critical pressure P a ; When the seawater temperature t1 < the fourth seawater critical temperature t d When the regulating valve opening is reduced, the condenser pressure P s = Second critical pressure P b .

2. The method for controlling the condenser cooling water flow rate in a refined manner according to claim 1, wherein: After step S400, the following steps are further included: If the third critical temperature of seawater t c Not greater than the second critical temperature of seawater t b , return to reset the critical operating pressure of the condenser and reset the minimum stable speed of the circulating water pump r min .

3. A device for finely controlling the flow rate of cooling water for a condenser, applied to a controller in a control system, wherein the control system further comprises a circulating water pump, a condenser, a regulating valve, a power switch, a temperature sensor, and a pressure sensor, wherein the controller is electrically connected to the circulating water pump, the regulating valve, the power switch, the temperature sensor, and the pressure sensor, respectively, and characterized in that: include: The first setting module is used to set the critical operating pressure of the condenser, which includes the first critical pressure P for controlling the speed of the circulating water pump. a and the second critical pressure P for controlling the opening of the regulating valve b ; The second setting module is used to set the minimum stable speed of the circulating water pump r min , as the reference value for the circulating water pump speed control; The third setting module is used to set multiple seawater critical temperatures, including: the circulating water pump is set at the lowest stable speed r of the circulating water pump. min Operation and condenser pressure is P a The first critical temperature of seawater corresponding to a , the circulating water pump is at the lowest stable speed r min Operation and condenser pressure is P b The second critical temperature of seawater corresponding to b , the circulating water pump stops and the condenser pressure is P a The third critical temperature of seawater corresponding to c , the circulating water pump stops and the condenser pressure is P b The fourth critical temperature of seawater corresponding to d ; A judgment module is used to verify the third critical temperature of seawater t c Is it greater than the second critical temperature of seawater t b ; The operating module is used for: if the third critical seawater temperature t c Greater than the second critical temperature of seawater t b , then the cooling water flow control operation is performed: according to the seawater temperature t1 collected by the temperature sensor and the condenser pressure P collected by the pressure sensor s , coordinate and control the circulating water pump and the regulating valve according to the following rules: When the seawater temperature t1> the first seawater critical temperature t a When the circulating water pump speed is higher than the minimum stable speed r of the circulating water pump min Operation, adjust the regulating valve opening to 100%, when the condenser pressure P s Exceeding the first critical pressure P a When the circulating water pump speed is increased, the condenser pressure P s = the first critical pressure P a ; When the first critical temperature of seawater t a ≥Seawater temperature t1 ≥ The third critical seawater temperature t c When the circulating water pump is at the lowest stable speed r min Run, adjust the opening of the regulating valve to 100%, at this time the second critical pressure P b <The condenser pressure P s <First critical pressure P a ; When the third critical temperature of seawater t c >Seawater temperature t1 >Second critical seawater temperature t b When the previous state remains unchanged, the second critical pressure P b <Condenser pressure P s <First critical pressure P a ; When the second critical temperature of seawater t b ≥Seawater temperature t1 ≥ Fourth seawater critical temperature t d When the circulating water pump stops, the regulating valve opening is adjusted to 100%. At this time, the second critical pressure P b ≤Condenser pressure P s <First critical pressure P a ; When the seawater temperature t1 < the fourth seawater critical temperature t d When the regulating valve opening is reduced, the condenser pressure P s = Second critical pressure P b .

4. The condenser cooling water flow refined control device according to claim 3, characterized in that: Also includes: Return module, used for if the third critical temperature of seawater t c Not greater than the second critical temperature of seawater t b , return to reset the critical operating pressure of the condenser and reset the minimum stable speed of the circulating water pump r min .

5. An electronic device, characterized in that: include: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for fine-tuning the condenser cooling water flow rate according to any one of claims 1-2.

6. A computer-readable storage medium, characterized in that The method comprises a computer program and instructions. When the computer program or the instructions are run on a computer, the computer is enabled to execute the method for fine-tuning the flow rate of cooling water of a condenser according to any one of claims 1 to 2.

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